file_storage.c revision b6c63937001889af6fe431aaba97e59d04e028e7
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file_storage.c -- File-backed USB Storage Gadget, for USB development 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern * Copyright (C) 2003-2007 Alan Stern 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or without 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modification, are permitted provided that the following conditions 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are met: 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1. Redistributions of source code must retain the above copyright 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions, and the following disclaimer, 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * without modification. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer in the 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * documentation and/or other materials provided with the distribution. 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3. The names of the above-listed copyright holders may not be used 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to endorse or promote products derived from this software without 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * specific prior written permission. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ALTERNATIVELY, this software may be distributed under the terms of the 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License ("GPL") as published by the Free Software 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, either version 2 of that License or (at your option) any 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * later version. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The File-backed Storage Gadget acts as a USB Mass Storage device, 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * appearing to the host as a disk drive. In addition to providing an 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example of a genuinely useful gadget driver for a USB device, it also 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * illustrates a technique of double-buffering for increased throughput. 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Last but not least, it gives an easy way to probe the behavior of the 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mass Storage drivers in a USB host. 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Backing storage is provided by a regular file or a block device, specified 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the "file" module parameter. Access can be limited to read-only by 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * setting the optional "ro" module parameter. The gadget will indicate that 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has removable media if the optional "removable" module parameter is set. 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI), 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the optional "transport" module parameter. It also supports the 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03), 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the optional "protocol" module parameter. In addition, the default 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Vendor ID, Product ID, and release number can be overridden. 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * There is support for multiple logical units (LUNs), each of which has 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * its own backing file. The number of LUNs can be set using the optional 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "luns" module parameter (anywhere from 1 to 8), and the corresponding 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * files are specified using comma-separated lists for "file" and "ro". 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The default number of LUNs is taken from the number of "file" elements; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it is 1 if "file" is not given. If "removable" is not set then a backing 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file must be specified for each LUN. If it is set, then an unspecified 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or empty backing filename means the LUN's medium is not loaded. 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Requirements are modest; only a bulk-in and a bulk-out endpoint are 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * needed (an interrupt-out endpoint is also needed for CBI). The memory 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * requirement amounts to two 16K buffers, size configurable by a parameter. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Support is included for both full-speed and high-speed operation. 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7414cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * Note that the driver is slightly non-portable in that it assumes a 7514cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * single memory/DMA buffer will be useable for bulk-in, bulk-out, and 7614cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * interrupt-in endpoints. With most device controllers this isn't an 7714cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * issue, but there may be some with hardware restrictions that prevent 7814cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * a buffer from being used by more than one endpoint. 7914cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Module options: 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file=filename[,filename...] 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Required if "removable" is not set, names of 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the files or block devices used for 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * backing storage 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ro=b[,b...] Default false, booleans for read-only access 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * removable Default false, boolean for removable media 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * luns=N Default N = number of filenames, number of 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LUNs to support 90d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * stall Default determined according to the type of 91d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * USB device controller (usually true), 92d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * boolean to permit the driver to halt 93d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * bulk endpoints 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * transport=XXX Default BBB, transport name (CB, CBI, or BBB) 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * protocol=YYY Default SCSI, protocol name (RBC, 8020 or 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ATAPI, QIC, UFI, 8070, or SCSI; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * also 1 - 6) 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vendor=0xVVVV Default 0x0525 (NetChip), USB Vendor ID 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * product=0xPPPP Default 0xa4a5 (FSG), USB Product ID 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * release=0xRRRR Override the USB release number (bcdDevice) 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buflen=N Default N=16384, buffer size used (will be 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rounded down to a multiple of 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PAGE_CACHE_SIZE) 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "ro", 106d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * "removable", "luns", and "stall" options are available; default values 107d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * are used for everything else. 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The pathnames of the backing files and the ro settings are available in 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the attribute files "file" and "ro" in the lun<n> subdirectory of the 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * gadget's sysfs directory. If the "removable" option is set, writing to 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * these files will simulate ejecting/loading the medium (writing an empty 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * line means eject) and adjusting a write-enable tab. Changes to the ro 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * setting are not allowed when the medium is loaded. 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This gadget driver is heavily based on "Gadget Zero" by David Brownell. 117aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * The driver's SCSI command interface was based on the "Information 118aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * technology - Small Computer System Interface - 2" document from 119aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * X3T9.2 Project 375D, Revision 10L, 7-SEP-93, available at 120aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>. The single exception 121aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * is opcode 0x23 (READ FORMAT CAPACITIES), which was based on the 122aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * "Universal Serial Bus Mass Storage Class UFI Command Specification" 123aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * document, Revision 1.0, December 14, 1998, available at 124aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>. 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Driver Design 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The FSG driver is fairly straightforward. There is a main kernel 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread that handles most of the work. Interrupt routines field 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * callbacks from the controller driver: bulk- and interrupt-request 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion notifications, endpoint-0 events, and disconnect events. 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Completion events are passed to the main thread by wakeup calls. Many 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ep0 requests are handled at interrupt time, but SetInterface, 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SetConfiguration, and device reset requests are forwarded to the 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread in the form of "exceptions" using SIGUSR1 signals (since they 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * should interrupt any ongoing file I/O operations). 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The thread's main routine implements the standard command/data/status 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parts of a SCSI interaction. It and its subroutines are full of tests 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for pending signals/exceptions -- all this polling is necessary since 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the kernel has no setjmp/longjmp equivalents. (Maybe this is an 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * indication that the driver really wants to be running in userspace.) 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * An important point is that so long as the thread is alive it keeps an 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * open reference to the backing file. This will prevent unmounting 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the backing file's underlying filesystem and could cause problems 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * during system shutdown, for example. To prevent such problems, the 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread catches INT, TERM, and KILL signals and converts them into 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * an EXIT exception. 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * In normal operation the main thread is started during the gadget's 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fsg_bind() callback and stopped during fsg_unbind(). But it can also 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exit when it receives a signal, and there's no point leaving the 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * gadget running when the thread is dead. So just before the thread 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exits, it deregisters the gadget driver. This makes things a little 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tricky: The driver is deregistered at two places, and the exiting 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread can indirectly call fsg_unbind() which in turn can tell the 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread to exit. The first problem is resolved through the use of the 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * REGISTERED atomic bitflag; the driver will only be deregistered once. 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The second problem is resolved by having fsg_unbind() check 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fsg->state; it won't try to stop the thread if the state is already 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FSG_STATE_TERMINATED. 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * To provide maximum throughput, the driver uses a circular pipeline of 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffer heads (struct fsg_buffhd). In principle the pipeline can be 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * arbitrarily long; in practice the benefits don't justify having more 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * than 2 stages (i.e., double buffering). But it helps to think of the 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pipeline as being a long one. Each buffer head contains a bulk-in and 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a bulk-out request pointer (since the buffer can be used for both 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * output and input -- directions always are given from the host's 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * point of view) as well as a pointer to the buffer and various state 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * variables. 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Use of the pipeline follows a simple protocol. There is a variable 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (fsg->next_buffhd_to_fill) that points to the next buffer head to use. 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * At any time that buffer head may still be in use from an earlier 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * request, so each buffer head has a state variable indicating whether 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffer head to be EMPTY, filling the buffer either by file I/O or by 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB I/O (during which the buffer head is BUSY), and marking the buffer 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * head FULL when the I/O is complete. Then the buffer will be emptied 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (again possibly by USB I/O, during which it is marked BUSY) and 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * finally marked EMPTY again (possibly by a completion routine). 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A module parameter tells the driver to avoid stalling the bulk 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * endpoints wherever the transport specification allows. This is 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * necessary for some UDCs like the SuperH, which cannot reliably clear a 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * halt on a bulk endpoint. However, under certain circumstances the 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bulk-only specification requires a stall. In such cases the driver 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * will halt the endpoint and set a flag indicating that it should clear 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the halt in software during the next device reset. Hopefully this 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * will permit everything to work correctly. Furthermore, although the 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * specification allows the bulk-out endpoint to halt when the host sends 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * too much data, implementing this would cause an unavoidable race. 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The driver will always use the "no-stall" approach for OUT transfers. 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * One subtle point concerns sending status-stage responses for ep0 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * requests. Some of these requests, such as device reset, can involve 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * interrupting an ongoing file I/O operation, which might take an 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * arbitrarily long time. During that delay the host might give up on 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the original ep0 request and issue a new one. When that happens the 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver should not notify the host about completion of the original 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * request, as the host will no longer be waiting for it. So the driver 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * assigns to each ep0 request a unique tag, and it keeps track of the 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tag value of the request associated with a long-running exception 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (device-reset, interface-change, or configuration-change). When the 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exception handler is finished, the status-stage response is submitted 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only if the current ep0 request tag is equal to the exception request 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tag. Thus only the most recently received ep0 request will get a 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * status-stage response. 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Warning: This driver source file is too long. It ought to be split up 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * into a header file plus about 3 separate .c files, to handle the details 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the Gadget, USB Mass Storage, and SCSI protocols. 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2202e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell/* #define VERBOSE_DEBUG */ 22179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern/* #define DUMP_MSGS */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkdev.h> 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dcache.h> 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fcntl.h> 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/file.h> 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 23287c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern#include <linux/kref.h> 23322efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern#include <linux/kthread.h> 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/limits.h> 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rwsem.h> 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 2397dfb71030f7636a0d65200158113c37764552f93Nigel Cunningham#include <linux/freezer.h> 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2425f848137744106ee737f559454ce5adfceb38347David Brownell#include <linux/usb/ch9.h> 2439454a57ab5922e5cd25321cae9d1a8cbeb3e2e85David Brownell#include <linux/usb/gadget.h> 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "gadget_chips.h" 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_DESC "File-backed Storage Gadget" 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_NAME "g_file_storage" 25279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#define DRIVER_VERSION "7 August 2007" 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char longname[] = DRIVER_DESC; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char shortname[] = DRIVER_NAME; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION(DRIVER_DESC); 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_AUTHOR("Alan Stern"); 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("Dual BSD/GPL"); 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Thanks to NetChip Technologies for donating this product ID. 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DO NOT REUSE THESE IDs with any other driver!! Ever!! 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Instead: allocate your own, using normal USB-IF procedures. */ 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_VENDOR_ID 0x0525 // NetChip 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_PRODUCT_ID 0xa4a5 // Linux-USB File-backed Storage Gadget 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This driver assumes self-powered hardware and has no way for users to 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * trigger remote wakeup. It uses autoconfiguration to select endpoints 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and endpoint addresses. 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LDBG(lun,fmt,args...) \ 27979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_dbg(&(lun)->dev , fmt , ## args) 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MDBG(fmt,args...) \ 28100274921a052d3232d9f00856387fb269ac0af11David Brownell pr_debug(DRIVER_NAME ": " fmt , ## args) 28200274921a052d3232d9f00856387fb269ac0af11David Brownell 28300274921a052d3232d9f00856387fb269ac0af11David Brownell#ifndef DEBUG 2842e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#undef VERBOSE_DEBUG 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef DUMP_MSGS 28600274921a052d3232d9f00856387fb269ac0af11David Brownell#endif /* !DEBUG */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2882e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#ifdef VERBOSE_DEBUG 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VLDBG LDBG 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VLDBG(lun,fmt,args...) \ 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { } while (0) 2932e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#endif /* VERBOSE_DEBUG */ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LERROR(lun,fmt,args...) \ 29679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_err(&(lun)->dev , fmt , ## args) 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LWARN(lun,fmt,args...) \ 29879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_warn(&(lun)->dev , fmt , ## args) 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LINFO(lun,fmt,args...) \ 30079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_info(&(lun)->dev , fmt , ## args) 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MINFO(fmt,args...) \ 30300274921a052d3232d9f00856387fb269ac0af11David Brownell pr_info(DRIVER_NAME ": " fmt , ## args) 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3052e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define DBG(d, fmt, args...) \ 3062e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_dbg(&(d)->gadget->dev , fmt , ## args) 3072e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define VDBG(d, fmt, args...) \ 3082e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_vdbg(&(d)->gadget->dev , fmt , ## args) 3092e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define ERROR(d, fmt, args...) \ 3102e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_err(&(d)->gadget->dev , fmt , ## args) 311b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven#define WARNING(d, fmt, args...) \ 3122e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_warn(&(d)->gadget->dev , fmt , ## args) 3132e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define INFO(d, fmt, args...) \ 3142e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_info(&(d)->gadget->dev , fmt , ## args) 3152e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Encapsulate the module parameter settings */ 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MAX_LUNS 8 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct { 324aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern char *file[MAX_LUNS]; 325aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern int ro[MAX_LUNS]; 3262e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell unsigned int num_filenames; 3272e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell unsigned int num_ros; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int nluns; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 330d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern int removable; 331d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern int can_stall; 332d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *transport_parm; 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *protocol_parm; 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short vendor; 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short product; 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short release; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int buflen; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int transport_type; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *transport_name; 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int protocol_type; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *protocol_name; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} mod_data = { // Default values 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .transport_parm = "BBB", 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .protocol_parm = "SCSI", 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .removable = 0, 349d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern .can_stall = 1, 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .vendor = DRIVER_VENDOR_ID, 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .product = DRIVER_PRODUCT_ID, 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = 0xffff, // Use controller chip type 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .buflen = 16384, 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 357aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Sternmodule_param_array_named(file, mod_data.file, charp, &mod_data.num_filenames, 358aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern S_IRUGO); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(file, "names of backing files or devices"); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Sternmodule_param_array_named(ro, mod_data.ro, bool, &mod_data.num_ros, S_IRUGO); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(ro, "true to force read-only"); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(luns, mod_data.nluns, uint, S_IRUGO); 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(luns, "number of LUNs"); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(removable, mod_data.removable, bool, S_IRUGO); 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(removable, "true to simulate removable media"); 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 370d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Sternmodule_param_named(stall, mod_data.can_stall, bool, S_IRUGO); 371d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan SternMODULE_PARM_DESC(stall, "false to prevent bulk stalls"); 372d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* In the non-TEST version, only the module parameters listed above 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are available. */ 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(transport, mod_data.transport_parm, charp, S_IRUGO); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)"); 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(protocol, mod_data.protocol_parm, charp, S_IRUGO); 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, " 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "8070, or SCSI)"); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(vendor, mod_data.vendor, ushort, S_IRUGO); 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(vendor, "USB Vendor ID"); 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(product, mod_data.product, ushort, S_IRUGO); 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(product, "USB Product ID"); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(release, mod_data.release, ushort, S_IRUGO); 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(release, "USB release number"); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(buflen, mod_data.buflen, uint, S_IRUGO); 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(buflen, "I/O buffer size"); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* USB protocol value = the transport method */ 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_PR_CBI 0x00 // Control/Bulk/Interrupt 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_PR_CB 0x01 // Control/Bulk w/o interrupt 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_PR_BULK 0x50 // Bulk-only 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* USB subclass value = the protocol encapsulation */ 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_RBC 0x01 // Reduced Block Commands (flash) 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_8020 0x02 // SFF-8020i, MMC-2, ATAPI (CD-ROM) 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_QIC 0x03 // QIC-157 (tape) 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_UFI 0x04 // UFI (floppy) 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_8070 0x05 // SFF-8070i (removable) 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_SCSI 0x06 // Transparent SCSI 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bulk-only data structures */ 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Command Block Wrapper */ 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct bulk_cb_wrap { 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 Signature; // Contains 'USBC' 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 Tag; // Unique per command id 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 DataTransferLength; // Size of the data 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Flags; // Direction in bit 7 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Lun; // LUN (normally 0) 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Length; // Of the CDB, <= MAX_COMMAND_SIZE 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 CDB[16]; // Command Data Block 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CB_WRAP_LEN 31 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CB_SIG 0x43425355 // Spells out USBC 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_IN_FLAG 0x80 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Command Status Wrapper */ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct bulk_cs_wrap { 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 Signature; // Should = 'USBS' 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 Tag; // Same as original command 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 Residue; // Amount not transferred 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Status; // See below 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CS_WRAP_LEN 13 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CS_SIG 0x53425355 // Spells out 'USBS' 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_STATUS_PASS 0 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_STATUS_FAIL 1 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_STATUS_PHASE_ERROR 2 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bulk-only class specific requests */ 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_RESET_REQUEST 0xff 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* CBI Interrupt data structure */ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct interrupt_data { 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 bType; 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 bValue; 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CBI_INTERRUPT_DATA_LEN 2 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* CBI Accept Device-Specific Command request */ 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_CBI_ADSC_REQUEST 0x00 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MAX_COMMAND_SIZE 16 // Length of a SCSI Command Data Block 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* SCSI commands that we recognize */ 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_FORMAT_UNIT 0x04 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_INQUIRY 0x12 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SELECT_6 0x15 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SELECT_10 0x55 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SENSE_6 0x1a 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SENSE_10 0x5a 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_6 0x08 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_10 0x28 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_12 0xa8 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_CAPACITY 0x25 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_FORMAT_CAPACITIES 0x23 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_RELEASE 0x17 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_REQUEST_SENSE 0x03 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_RESERVE 0x16 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_SEND_DIAGNOSTIC 0x1d 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_START_STOP_UNIT 0x1b 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_SYNCHRONIZE_CACHE 0x35 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_TEST_UNIT_READY 0x00 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_VERIFY 0x2f 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_WRITE_6 0x0a 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_WRITE_10 0x2a 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_WRITE_12 0xaa 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */ 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_NO_SENSE 0 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_COMMUNICATION_FAILURE 0x040800 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_INVALID_COMMAND 0x052000 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_INVALID_FIELD_IN_CDB 0x052400 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_MEDIUM_NOT_PRESENT 0x023a00 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_NOT_READY_TO_READY_TRANSITION 0x062800 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_RESET_OCCURRED 0x062900 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_UNRECOVERED_READ_ERROR 0x031100 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_WRITE_ERROR 0x030c02 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_WRITE_PROTECTED 0x072700 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SK(x) ((u8) ((x) >> 16)) // Sense Key byte, etc. 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ASC(x) ((u8) ((x) >> 8)) 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ASCQ(x) ((u8) (x)) 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * These definitions will permit the compiler to avoid generating code for 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parts of the driver that aren't used in the non-TEST version. Even gcc 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * can recognize when a test of a constant expression yields a dead code 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * path. 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_bbb() (mod_data.transport_type == USB_PR_BULK) 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_cbi() (mod_data.transport_type == USB_PR_CBI) 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define protocol_is_scsi() (mod_data.protocol_type == USB_SC_SCSI) 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_bbb() 1 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_cbi() 0 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define protocol_is_scsi() 1 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct lun { 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t file_length; 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t num_sectors; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int ro : 1; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int prevent_medium_removal : 1; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int registered : 1; 5436174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern unsigned int info_valid : 1; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sense_data; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sense_data_info; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 unit_attention_data; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device dev; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define backing_file_is_open(curlun) ((curlun)->filp != NULL) 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 55479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic struct lun *dev_to_lun(struct device *dev) 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return container_of(dev, struct lun, dev); 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Big enough to hold our biggest descriptor */ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define EP0_BUFSIZE 256 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DELAYED_STATUS (EP0_BUFSIZE + 999) // An impossibly large value 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Number of buffers we will use. 2 is enough for double-buffering */ 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define NUM_BUFFERS 2 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum fsg_buffer_state { 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUF_STATE_EMPTY = 0, 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUF_STATE_FULL, 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUF_STATE_BUSY 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct fsg_buffhd { 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 575a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern enum fsg_buffer_state state; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *next; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The NetChip 2280 is faster, and handles some protocol faults 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * better, if we don't submit any short bulk-out read requests. 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * So we will record the intended request length here. */ 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_out_intended_length; 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *inreq; 584a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int inreq_busy; 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *outreq; 586a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int outreq_busy; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum fsg_state { 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_COMMAND_PHASE = -10, // This one isn't used anywhere 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_DATA_PHASE, 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_STATUS_PHASE, 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_IDLE = 0, 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_ABORT_BULK_OUT, 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_RESET, 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_INTERFACE_CHANGE, 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_CONFIG_CHANGE, 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_DISCONNECT, 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_EXIT, 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_TERMINATED 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum data_direction { 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_UNKNOWN = 0, 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_FROM_HOST, 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_TO_HOST, 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_NONE 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct fsg_dev { 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lock protects: state, all the req_busy's, and cbbuf_cmnd */ 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_gadget *gadget; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* filesem protects: backing files in use */ 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rw_semaphore filesem; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 61987c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern /* reference counting: wait until all LUNs are released */ 62087c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern struct kref ref; 62187c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *ep0; // Handy copy of gadget->ep0 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *ep0req; // For control responses 624a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern unsigned int ep0_req_tag; 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *ep0req_name; 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *intreq; // For interrupt responses 628a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int intreq_busy; 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *intr_buffhd; 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_out_maxpacket; 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum fsg_state state; // For exception handling 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int exception_req_tag; 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 config, new_config; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int running : 1; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_in_enabled : 1; 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_out_enabled : 1; 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int intr_in_enabled : 1; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int phase_error : 1; 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int short_packet_received : 1; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bad_lun_okay : 1; 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long atomic_bitflags; 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define REGISTERED 0 647b950bdbc67041412cb042e404938667204c7902cAlan Stern#define IGNORE_BULK_OUT 1 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SUSPENDED 2 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *bulk_in; 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *bulk_out; 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *intr_in; 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *next_buffhd_to_fill; 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *next_buffhd_to_drain; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd buffhds[NUM_BUFFERS]; 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int thread_wakeup_needed; 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct completion thread_notifier; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct task_struct *thread_task; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cmnd_size; 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 cmnd[MAX_COMMAND_SIZE]; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum data_direction data_dir; 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_size; 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_size_from_cmnd; 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 tag; 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int lun; 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 residue; 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 usb_amount_left; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The CB protocol offers no way for a host to know when a command 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * has completed. As a result the next command may arrive early, 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and we will still have to handle it. For that reason we need 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a buffer to store new commands when using CB (or CBI, which 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * does not oblige a host to wait for command completion either). */ 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cbbuf_cmnd_size; 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 cbbuf_cmnd[MAX_COMMAND_SIZE]; 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int nluns; 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *luns; 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef void (*fsg_routine_t)(struct fsg_dev *); 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 68779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic int exception_in_progress(struct fsg_dev *fsg) 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (fsg->state > FSG_STATE_IDLE); 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Make bulk-out requests be divisible by the maxpacket size */ 69379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void set_bulk_out_req_length(struct fsg_dev *fsg, 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh, unsigned int length) 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int rem; 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->bulk_out_intended_length = length; 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rem = length % fsg->bulk_out_maxpacket; 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rem > 0) 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds length += fsg->bulk_out_maxpacket - rem; 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->length = length; 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct fsg_dev *the_fsg; 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_gadget_driver fsg_driver; 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_backing_file(struct lun *curlun); 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_all_backing_files(struct fsg_dev *fsg); 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DUMP_MSGS 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void dump_msg(struct fsg_dev *fsg, const char *label, 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *buf, unsigned int length) 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 71979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (length < 512) { 72079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern DBG(fsg, "%s, length %u:\n", label, length); 72179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 72279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 16, 1, buf, length, 0); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 72679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_cdb(struct fsg_dev *fsg) 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_msg(struct fsg_dev *fsg, const char *label, 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *buf, unsigned int length) 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#ifdef VERBOSE_DEBUG 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_cdb(struct fsg_dev *fsg) 73879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern{ 73979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, 74079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 16, 1, fsg->cmnd, fsg->cmnd_size, 0); 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 74379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#else 74479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 74579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_cdb(struct fsg_dev *fsg) 74679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern{} 74779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 74879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#endif /* VERBOSE_DEBUG */ 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DUMP_MSGS */ 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep) 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *name; 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ep == fsg->bulk_in) 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = "bulk-in"; 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (ep == fsg->bulk_out) 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = "bulk-out"; 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = ep->name; 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "%s set halt\n", name); 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return usb_ep_set_halt(ep); 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Routines for unaligned data access */ 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 77179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic u16 get_be16(u8 *buf) 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((u16) buf[0] << 8) | ((u16) buf[1]); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 77679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic u32 get_be32(u8 *buf) 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) | 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((u32) buf[2] << 8) | ((u32) buf[3]); 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 78279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void put_be16(u8 *buf, u16 val) 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = val >> 8; 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = val; 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 78879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void put_be32(u8 *buf, u32 val) 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = val >> 24; 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = val >> 16; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = val >> 8; 7931bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell buf[3] = val & 0xff; 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DESCRIPTORS ... most are static, but strings and (full) configuration 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * descriptors are built on demand. Also the (static) config and interface 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * descriptors are adjusted during fsg_bind(). 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_MANUFACTURER 1 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_PRODUCT 2 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_SERIAL 3 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_CONFIG 4 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_INTERFACE 5 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* There is only one configuration. */ 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CONFIG_VALUE 1 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_device_descriptor 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdevice_desc = { 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof device_desc, 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_DEVICE, 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bcdUSB = __constant_cpu_to_le16(0x0200), 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDeviceClass = USB_CLASS_PER_INTERFACE, 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The next three values can be overridden by module parameters */ 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .idVendor = __constant_cpu_to_le16(DRIVER_VENDOR_ID), 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .idProduct = __constant_cpu_to_le16(DRIVER_PRODUCT_ID), 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bcdDevice = __constant_cpu_to_le16(0xffff), 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iManufacturer = STRING_MANUFACTURER, 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iProduct = STRING_PRODUCT, 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iSerialNumber = STRING_SERIAL, 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumConfigurations = 1, 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_config_descriptor 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsconfig_desc = { 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof config_desc, 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_CONFIG, 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wTotalLength computed by usb_gadget_config_buf() */ 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumInterfaces = 1, 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bConfigurationValue = CONFIG_VALUE, 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iConfiguration = STRING_CONFIG, 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bMaxPower = 1, // self-powered 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_otg_descriptor 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsotg_desc = { 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof(otg_desc), 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_OTG, 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_OTG_SRP, 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* There is only one interface. */ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_interface_descriptor 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsintf_desc = { 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof intf_desc, 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_INTERFACE, 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumEndpoints = 2, // Adjusted during fsg_bind() 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterfaceClass = USB_CLASS_MASS_STORAGE, 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterfaceSubClass = USB_SC_SCSI, // Adjusted during fsg_bind() 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterfaceProtocol = USB_PR_BULK, // Adjusted during fsg_bind() 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iInterface = STRING_INTERFACE, 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Three full-speed endpoint descriptors: bulk-in, bulk-out, 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and interrupt-in. */ 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfs_bulk_in_desc = { 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bEndpointAddress = USB_DIR_IN, 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wMaxPacketSize set by autoconfiguration */ 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfs_bulk_out_desc = { 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bEndpointAddress = USB_DIR_OUT, 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wMaxPacketSize set by autoconfiguration */ 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfs_intr_in_desc = { 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bEndpointAddress = USB_DIR_IN, 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_INT, 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(2), 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterval = 32, // frames -> 32 ms 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const struct usb_descriptor_header *fs_function[] = { 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &otg_desc, 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &intf_desc, 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &fs_bulk_in_desc, 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &fs_bulk_out_desc, 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &fs_intr_in_desc, 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NULL, 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define FS_FUNCTION_PRE_EP_ENTRIES 2 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0 devices need to expose both high speed and full speed 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * descriptors, unless they only run at full speed. 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * That means alternate endpoint descriptors (bigger packets) 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and a "device qualifier" ... plus more construction options 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for the config descriptor. 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_qualifier_descriptor 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdev_qualifier = { 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof dev_qualifier, 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bcdUSB = __constant_cpu_to_le16(0x0200), 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDeviceClass = USB_CLASS_PER_INTERFACE, 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumConfigurations = 1, 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshs_bulk_in_desc = { 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */ 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(512), 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshs_bulk_out_desc = { 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */ 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(512), 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterval = 1, // NAK every 1 uframe 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshs_intr_in_desc = { 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */ 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_INT, 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(2), 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterval = 9, // 2**(9-1) = 256 uframes -> 32 ms 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const struct usb_descriptor_header *hs_function[] = { 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &otg_desc, 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &intf_desc, 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &hs_bulk_in_desc, 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &hs_bulk_out_desc, 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &hs_intr_in_desc, 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NULL, 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HS_FUNCTION_PRE_EP_ENTRIES 2 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Maxpacket and other transfer characteristics vary by speed. */ 97479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic struct usb_endpoint_descriptor * 9752e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownellep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs, 9762e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell struct usb_endpoint_descriptor *hs) 9772e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell{ 9782e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 9792e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell return hs; 9802e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell return fs; 9812e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell} 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The CBI specification limits the serial string to 12 uppercase hexadecimal 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * characters. */ 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char manufacturer[64]; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char serial[13]; 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */ 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_string strings[] = { 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_MANUFACTURER, manufacturer}, 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_PRODUCT, longname}, 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_SERIAL, serial}, 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_CONFIG, "Self-powered"}, 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_INTERFACE, "Mass Storage"}, 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {} 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_gadget_strings stringtab = { 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .language = 0x0409, // en-us 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .strings = strings, 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Config descriptors must agree with the code that sets configurations 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and with code managing interfaces and their altsettings. They must 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * also handle different speeds and other-speed requests. 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int populate_config_buf(struct usb_gadget *gadget, 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf, u8 type, unsigned index) 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum usb_device_speed speed = gadget->speed; 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len; 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_descriptor_header **function; 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (index > 0) 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10202e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(gadget) && type == USB_DT_OTHER_SPEED_CONFIG) 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed; 10222e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(gadget) && speed == USB_SPEED_HIGH) 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds function = hs_function; 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds function = fs_function; 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* for now, don't advertise srp-only devices */ 10282e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (!gadget_is_otg(gadget)) 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds function++; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = usb_gadget_config_buf(&config_desc, buf, EP0_BUFSIZE, function); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *) buf)->bDescriptorType = type; 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* These routines may be called in process context or in_irq */ 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1041a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern/* Caller must hold fsg->lock */ 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void wakeup_thread(struct fsg_dev *fsg) 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Tell the main thread that something has happened */ 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->thread_wakeup_needed = 1; 1046a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern if (fsg->thread_task) 1047a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern wake_up_process(fsg->thread_task); 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state) 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Do nothing if a higher-priority exception is already in progress. 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If a lower-or-equal priority exception is in progress, preempt it 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and notify the main thread by sending it a signal. */ 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&fsg->lock, flags); 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state <= new_state) { 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->exception_req_tag = fsg->ep0_req_tag; 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = new_state; 106222efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern if (fsg->thread_task) 106322efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern send_sig_info(SIGUSR1, SEND_SIG_FORCED, 106422efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern fsg->thread_task); 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&fsg->lock, flags); 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The disconnect callback and ep0 routines. These always run in_irq, 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * except that ep0_queue() is called in the main thread to acknowledge 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion of various requests: set config, set interface, and 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bulk-only device reset. */ 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsg_disconnect(struct usb_gadget *gadget) 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "disconnect or port reset\n"); 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_DISCONNECT); 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ep0_queue(struct fsg_dev *fsg) 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC); 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0 && rc != -ESHUTDOWN) { 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't do much more than wait for a reset */ 1094b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven WARNING(fsg, "error in submission: %s --> %d\n", 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0->name, rc); 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ep0_complete(struct usb_ep *ep, struct usb_request *req) 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11027ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->actual > 0) 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, fsg->ep0req_name, req->buf, req->actual); 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != req->length) 1107441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison DBG(fsg, "%s --> %d, %u/%u\n", __func__, 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, req->length); 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == 0 && req->context) 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((fsg_routine_t) (req->context))(fsg); 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bulk and interrupt endpoint completion handlers. 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * These always run in_irq. */ 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bulk_in_complete(struct usb_ep *ep, struct usb_request *req) 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11247ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11257ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_buffhd *bh = req->context; 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != req->length) 1128441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison DBG(fsg, "%s --> %d, %u/%u\n", __func__, 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, req->length); 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Hold the lock while we update the request and buffer states */ 1134a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_wmb(); 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq_busy = 0; 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1139a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bulk_out_complete(struct usb_ep *ep, struct usb_request *req) 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11447ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11457ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_buffhd *bh = req->context; 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "bulk-out", req->buf, req->actual); 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != bh->bulk_out_intended_length) 1149441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison DBG(fsg, "%s --> %d, %u/%u\n", __func__, 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->bulk_out_intended_length); 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Hold the lock while we update the request and buffer states */ 1156a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_wmb(); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq_busy = 0; 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1161a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void intr_in_complete(struct usb_ep *ep, struct usb_request *req) 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11687ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11697ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_buffhd *bh = req->context; 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != req->length) 1172441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison DBG(fsg, "%s --> %d, %u/%u\n", __func__, 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, req->length); 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Hold the lock while we update the request and buffer states */ 1178a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_wmb(); 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq_busy = 0; 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1183a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void intr_in_complete(struct usb_ep *ep, struct usb_request *req) 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Ep0 class-specific handlers. These always run in_irq. */ 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh) 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static u8 cbi_reset_cmnd[6] = { 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SC_SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff}; 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Error in command transfer? */ 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->length != req->actual || 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->actual < 6 || req->actual > MAX_COMMAND_SIZE) { 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Not all controllers allow a protocol stall after 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * receiving control-out data, but we'll try anyway. */ 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->ep0); 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; // Wait for reset 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is it the special reset command? */ 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->actual >= sizeof cbi_reset_cmnd && 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcmp(req->buf, cbi_reset_cmnd, 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof cbi_reset_cmnd) == 0) { 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to stop the current operation 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and reinitialize our state. */ 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "cbi reset request\n"); 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_RESET); 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "CB[I] accept device-specific command\n"); 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Save the command for later */ 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cbbuf_cmnd_size) 1230b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven WARNING(fsg, "CB[I] overwriting previous command\n"); 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cbbuf_cmnd_size = req->actual; 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size); 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1235a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh) 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int class_setup_req(struct fsg_dev *fsg, 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_ctrlrequest *ctrl) 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value = -EOPNOTSUPP; 12491bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_index = le16_to_cpu(ctrl->wIndex); 125088e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret u16 w_value = le16_to_cpu(ctrl->wValue); 12511bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_length = le16_to_cpu(ctrl->wLength); 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->config) 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle Bulk-only class-specific requests */ 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (ctrl->bRequest) { 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_BULK_RESET_REQUEST: 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT | 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_TYPE_CLASS | USB_RECIP_INTERFACE)) 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 126488e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret if (w_index != 0 || w_value != 0) { 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to stop the current operation 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and reinitialize our state. */ 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "bulk reset request\n"); 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_RESET); 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = DELAYED_STATUS; 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_BULK_GET_MAX_LUN_REQUEST: 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_TYPE_CLASS | USB_RECIP_INTERFACE)) 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 128088e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret if (w_index != 0 || w_value != 0) { 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get max LUN\n"); 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(u8 *) req->buf = fsg->nluns - 1; 128676f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = 1; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle CBI class-specific requests */ 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (ctrl->bRequest) { 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_CBI_ADSC_REQUEST: 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT | 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_TYPE_CLASS | USB_RECIP_INTERFACE)) 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 129988e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret if (w_index != 0 || w_value != 0) { 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (w_length > MAX_COMMAND_SIZE) { 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EOVERFLOW; 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = w_length; 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->context = received_cbi_adsc; 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (value == -EOPNOTSUPP) 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "unknown class-specific control req " 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "%02x.%02x v%04x i%04x l%u\n", 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl->bRequestType, ctrl->bRequest, 13181bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell le16_to_cpu(ctrl->wValue), w_index, w_length); 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Ep0 standard request handlers. These always run in_irq. */ 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int standard_setup_req(struct fsg_dev *fsg, 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_ctrlrequest *ctrl) 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value = -EOPNOTSUPP; 13321bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_index = le16_to_cpu(ctrl->wIndex); 13331bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_value = le16_to_cpu(ctrl->wValue); 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Usually this just stores reply data in the pre-allocated ep0 buffer, 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but config change events will also reconfigure hardware. */ 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (ctrl->bRequest) { 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_GET_DESCRIPTOR: 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_DEVICE)) 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (w_value >> 8) { 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE: 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get device descriptor\n"); 134776f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = sizeof device_desc; 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(req->buf, &device_desc, value); 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE_QUALIFIER: 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get device qualifier\n"); 13522e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (!gadget_is_dualspeed(fsg->gadget)) 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 135476f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = sizeof dev_qualifier; 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(req->buf, &dev_qualifier, value); 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_OTHER_SPEED_CONFIG: 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get other-speed config descriptor\n"); 13602e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (!gadget_is_dualspeed(fsg->gadget)) 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto get_config; 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG: 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get configuration descriptor\n"); 13652e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownellget_config: 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = populate_config_buf(fsg->gadget, 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->buf, 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds w_value >> 8, 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds w_value & 0xff); 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING: 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get string descriptor\n"); 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wIndex == language code */ 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = usb_gadget_get_string(&stringtab, 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds w_value & 0xff, req->buf); 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* One config, two speeds */ 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_SET_CONFIGURATION: 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_DEVICE)) 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "set configuration\n"); 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (w_value == CONFIG_VALUE || w_value == 0) { 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->new_config = w_value; 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to wipe out previous transaction 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * state (queued bufs, etc) and set the new config. */ 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_CONFIG_CHANGE); 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = DELAYED_STATUS; 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_GET_CONFIGURATION: 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_DEVICE)) 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get configuration\n"); 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(u8 *) req->buf = fsg->config; 140376f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = 1; 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_SET_INTERFACE: 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD | 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_INTERFACE)) 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->config && w_index == 0) { 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to wipe out previous transaction 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * state (queued bufs, etc) and install the new 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * interface altsetting. */ 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_INTERFACE_CHANGE); 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = DELAYED_STATUS; 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_GET_INTERFACE: 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_INTERFACE)) 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->config) 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (w_index != 0) { 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get interface\n"); 14301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(u8 *) req->buf = 0; 143176f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = 1; 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "unknown control req %02x.%02x v%04x i%04x l%u\n", 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl->bRequestType, ctrl->bRequest, 14381bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell w_value, w_index, le16_to_cpu(ctrl->wLength)); 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsg_setup(struct usb_gadget *gadget, 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_ctrlrequest *ctrl) 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 14501bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell int w_length = le16_to_cpu(ctrl->wLength); 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++fsg->ep0_req_tag; // Record arrival of a new request 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->context = NULL; 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->length = 0; 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl)); 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = class_setup_req(fsg, ctrl); 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = standard_setup_req(fsg, ctrl); 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Respond with data/status or defer until later? */ 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc >= 0 && rc != DELAYED_STATUS) { 146476f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern rc = min(rc, w_length); 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->length = rc; 14661bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell fsg->ep0req->zero = rc < w_length; 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ? 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ep0-in" : "ep0-out"); 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = ep0_queue(fsg); 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Device either stalls (rc < 0) or reports success */ 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* All the following routines run in process context */ 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Use this for bulk or interrupt transfers, not ep0 */ 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep, 1484a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern struct usb_request *req, int *pbusy, 1485a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern enum fsg_buffer_state *state) 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ep == fsg->bulk_in) 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "bulk-in", req->buf, req->length); 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (ep == fsg->intr_in) 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "intr-in", req->buf, req->length); 1493a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern 1494a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_lock_irq(&fsg->lock); 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *pbusy = 1; 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *state = BUF_STATE_BUSY; 1497a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock_irq(&fsg->lock); 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_queue(ep, req, GFP_KERNEL); 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0) { 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *pbusy = 0; 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *state = BUF_STATE_EMPTY; 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't do much more than wait for a reset */ 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Note: currently the net2280 driver fails zero-length 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * submissions if DMA is enabled. */ 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP && 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->length == 0)) 1509b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven WARNING(fsg, "error in submission: %s --> %d\n", 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->name, rc); 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int sleep_thread(struct fsg_dev *fsg) 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1517a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int rc = 0; 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait until a signal arrives or we are woken up */ 1520a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern for (;;) { 1521a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern try_to_freeze(); 1522a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern set_current_state(TASK_INTERRUPTIBLE); 1523a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern if (signal_pending(current)) { 1524a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern rc = -EINTR; 1525a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern break; 1526a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern } 1527a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern if (fsg->thread_wakeup_needed) 1528a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern break; 1529a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern schedule(); 1530a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern } 1531a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern __set_current_state(TASK_RUNNING); 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->thread_wakeup_needed = 0; 1533a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern return rc; 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_read(struct fsg_dev *fsg) 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba; 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount_left; 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t file_offset, file_offset_tmp; 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int amount; 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int partial_page; 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t nread; 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the starting Logical Block Address and check that it's 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not too big */ 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] == SC_READ_6) 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]); 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = get_be32(&fsg->cmnd[2]); 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We allow DPO (Disable Page Out = don't save data in the 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache) and FUA (Force Unit Access = don't read from the 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache), but we don't implement them. */ 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x18) != 0) { 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (lba >= curlun->num_sectors) { 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset = ((loff_t) lba) << 9; 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Carry out the file reads */ 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left = fsg->data_size_from_cmnd; 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(amount_left == 0)) 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Figure out how much we need to read: 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Try to read the remaining amount. 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * But don't read more than the buffer size. 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * And don't try to read past the end of the file. 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finally, if we're not at a page boundary, don't read past 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the next page. 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this means reading 0 then we were asked to read past 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the end of file. */ 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((unsigned int) amount_left, mod_data.buflen); 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((loff_t) amount, 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->file_length - file_offset); 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds partial_page = file_offset & (PAGE_CACHE_SIZE - 1); 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (partial_page > 0) 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(amount, (unsigned int) PAGE_CACHE_SIZE - 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds partial_page); 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available */ 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 159879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 159979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If we were asked to read past the end of file, 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * end with an empty buffer. */ 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 16096174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = 0; 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Perform the read */ 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset_tmp = file_offset; 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = vfs_read(curlun->filp, 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (char __user *) bh->buf, 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, &file_offset_tmp); 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) file_offset, 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread < 0) { 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "error in file read: %d\n", 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = 0; 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (nread < amount) { 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "partial file read: %d/%u\n", 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread, amount); 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread -= (nread & 511); // Round down to a block 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset += nread; 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left -= nread; 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue -= nread; 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = nread; 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If an error occurred, report it and its position */ 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread < amount) { 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_UNRECOVERED_READ_ERROR; 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 16456174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount_left == 0) 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // No more left to read 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Send this buffer and go read some more */ 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_write(struct fsg_dev *fsg) 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba; 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int get_some_more; 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount_left_to_req, amount_left_to_write; 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t usb_offset, file_offset, file_offset_tmp; 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int amount; 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int partial_page; 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t nwritten; 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->ro) { 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_WRITE_PROTECTED; 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp->f_flags &= ~O_SYNC; // Default is not to wait 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the starting Logical Block Address and check that it's 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not too big */ 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] == SC_WRITE_6) 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]); 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = get_be32(&fsg->cmnd[2]); 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We allow DPO (Disable Page Out = don't save data in the 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache) and FUA (Force Unit Access = write directly to the 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * medium). We don't implement DPO; we implement FUA by 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * performing synchronous output. */ 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x18) != 0) { 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[1] & 0x08) // FUA 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp->f_flags |= O_SYNC; 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (lba >= curlun->num_sectors) { 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Carry out the file writes */ 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 1; 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset = usb_offset = ((loff_t) lba) << 9; 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd; 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (amount_left_to_write > 0) { 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Queue a request for more data from the host */ 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_EMPTY && get_some_more) { 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Figure out how much we want to get: 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Try to get the remaining amount. 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * But don't get more than the buffer size. 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * And don't try to go past the end of the file. 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we're not at a page boundary, 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * don't go past the next page. 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this means getting 0, then we were asked 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to write past the end of file. 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finally, round down to a block boundary. */ 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(amount_left_to_req, mod_data.buflen); 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((loff_t) amount, curlun->file_length - 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_offset); 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds partial_page = usb_offset & (PAGE_CACHE_SIZE - 1); 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (partial_page > 0) 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(amount, 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned int) PAGE_CACHE_SIZE - partial_page); 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 0; 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = usb_offset >> 9; 17406174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount -= (amount & 511); 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Why were we were asked to transfer a 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * partial block? */ 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 0; 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the next buffer */ 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_offset += amount; 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left -= amount; 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left_to_req -= amount; 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount_left_to_req == 0) 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 0; 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* amount is always divisible by 512, hence by 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the bulk-out maxpacket size */ 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->length = bh->bulk_out_intended_length = 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount; 176370ffe6e14d7c5db84b92841471ce6fd0200010cdAlan Stern bh->outreq->short_not_ok = 1; 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_out, bh->outreq, 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->outreq_busy, &bh->state); 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write the received data to the backing file */ 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_drain; 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_EMPTY && !get_some_more) 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // We stopped early 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_FULL) { 1775a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_rmb(); 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_drain = bh->next; 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did something go wrong with the transfer? */ 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq->status != 0) { 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_COMMUNICATION_FAILURE; 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 17836174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = bh->outreq->actual; 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->file_length - file_offset < amount) { 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LERROR(curlun, 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "write %u @ %llu beyond end %llu\n", 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, (unsigned long long) file_offset, 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) curlun->file_length); 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = curlun->file_length - file_offset; 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Perform the write */ 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset_tmp = file_offset; 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nwritten = vfs_write(curlun->filp, 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (char __user *) bh->buf, 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, &file_offset_tmp); 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "file write %u @ %llu -> %d\n", amount, 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) file_offset, 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nwritten); 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; // Interrupted! 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nwritten < 0) { 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "error in file write: %d\n", 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nwritten); 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nwritten = 0; 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (nwritten < amount) { 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "partial file write: %d/%u\n", 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nwritten, amount); 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nwritten -= (nwritten & 511); 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Round down to a block 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset += nwritten; 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left_to_write -= nwritten; 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue -= nwritten; 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If an error occurred, report it and its position */ 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nwritten < amount) { 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_WRITE_ERROR; 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 18256174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the host decide to stop early? */ 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq->actual != bh->outreq->length) { 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->short_packet_received = 1; 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for something to happen */ 183879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 183979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Sync the file data, don't bother with the metadata. 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code was copied from fs/buffer.c:sys_fdatasync(). */ 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsync_sub(struct lun *curlun) 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp = curlun->filp; 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct inode *inode; 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc, err; 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->ro || !filp) 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!filp->f_op->fsync) 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 186233cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek inode = filp->f_path.dentry->d_inode; 18631b1dcc1b57a49136f118a0f16367256ff9994a69Jes Sorensen mutex_lock(&inode->i_mutex); 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = filemap_fdatawrite(inode->i_mapping); 186533cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek err = filp->f_op->fsync(filp, filp->f_path.dentry, 1); 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!rc) 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = err; 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = filemap_fdatawait(inode->i_mapping); 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!rc) 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = err; 18711b1dcc1b57a49136f118a0f16367256ff9994a69Jes Sorensen mutex_unlock(&inode->i_mutex); 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "fdatasync -> %d\n", rc); 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsync_all(struct fsg_dev *fsg) 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 18791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) 18811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_sub(&fsg->luns[i]); 18821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_synchronize_cache(struct fsg_dev *fsg) 18851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 18871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 18881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We ignore the requested LBA and write out all file's 18901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dirty data buffers. */ 18911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = fsync_sub(curlun); 18921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) 18931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_WRITE_ERROR; 18941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void invalidate_sub(struct lun *curlun) 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp = curlun->filp; 190333cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek struct inode *inode = filp->f_path.dentry->d_inode; 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long rc; 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1906fc0ecff698165ae8e178efa086e0dd1f385206b1Andrew Morton rc = invalidate_mapping_pages(inode->i_mapping, 0, -1); 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "invalidate_inode_pages -> %ld\n", rc); 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_verify(struct fsg_dev *fsg) 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba; 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 verification_length; 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t file_offset, file_offset_tmp; 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount_left; 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int amount; 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t nread; 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the starting Logical Block Address and check that it's 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not too big */ 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = get_be32(&fsg->cmnd[2]); 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (lba >= curlun->num_sectors) { 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We allow DPO (Disable Page Out = don't save data in the 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache) but we don't implement it. */ 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x10) != 0) { 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds verification_length = get_be16(&fsg->cmnd[7]); 19371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(verification_length == 0)) 19381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Prepare to carry out the file verify */ 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left = verification_length << 9; 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset = ((loff_t) lba) << 9; 19431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write out all the dirty buffers before invalidating them */ 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_sub(curlun); 19461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 19471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds invalidate_sub(curlun); 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 19511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Just try to read the requested blocks */ 19541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (amount_left > 0) { 19551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Figure out how much we need to read: 19571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Try to read the remaining amount, but not more than 19581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the buffer size. 19591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * And don't try to read past the end of the file. 19601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this means reading 0 then we were asked to read 19611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * past the end of file. */ 19621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((unsigned int) amount_left, mod_data.buflen); 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((loff_t) amount, 19641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->file_length - file_offset); 19651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = 19671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 19681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 19696174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 19701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 19711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Perform the read */ 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset_tmp = file_offset; 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = vfs_read(curlun->filp, 19761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (char __user *) bh->buf, 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, &file_offset_tmp); 19781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, 19791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) file_offset, 19801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 19811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread < 0) { 19851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "error in file verify: %d\n", 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 19871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = 0; 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (nread < amount) { 19891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "partial file verify: %d/%u\n", 19901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread, amount); 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread -= (nread & 511); // Round down to a sector 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread == 0) { 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_UNRECOVERED_READ_ERROR; 19951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 19966174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 19981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset += nread; 20001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left -= nread; 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh) 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char vendor_id[] = "Linux "; 20131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char product_id[] = "File-Stor Gadget"; 20141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->curlun) { // Unsupported LUNs are okay 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bad_lun_okay = 1; 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 36); 20181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 0x7f; // Unsupported, no device-type 20191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 36; 20201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 8); // Non-removable, direct-access device 20231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.removable) 20241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = 0x80; 20251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 2; // ANSI SCSI level 2 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = 2; // SCSI-2 INQUIRY data format 20271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[4] = 31; // Additional length 20281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // No special options 20291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(buf + 8, "%-8s%-16s%04x", vendor_id, product_id, 20301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.release); 20311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 36; 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh) 20361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 20391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sd, sdinfo; 20406174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern int valid; 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * From the SCSI-2 spec., section 7.9 (Unit attention condition): 20441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If a REQUEST SENSE command is received from an initiator 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with a pending unit attention condition (before the target 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * generates the contingent allegiance condition), then the 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * target shall either: 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a) report any pending sense data and preserve the unit 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * attention condition on the logical unit, or, 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * b) report the unit attention condition, may discard any 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pending sense data, and clear the unit attention 20531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * condition on the logical unit for that initiator. 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FSG normally uses option a); enable this code to use option b). 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun && curlun->unit_attention_data != SS_NO_SENSE) { 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = curlun->unit_attention_data; 20601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = SS_NO_SENSE; 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!curlun) { // Unsupported LUNs are okay 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bad_lun_okay = 1; 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdinfo = 0; 20686174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern valid = 0; 20691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 20701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = curlun->sense_data; 20711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdinfo = curlun->sense_data_info; 20726174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern valid = curlun->info_valid << 7; 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_NO_SENSE; 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = 0; 20756174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 0; 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 18); 20796174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern buf[0] = valid | 0x70; // Valid, current error 20801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = SK(sd); 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[3], sdinfo); // Sense information 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[7] = 18 - 8; // Additional sense length 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[12] = ASC(sd); 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[13] = ASCQ(sd); 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 18; 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh) 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba = get_be32(&fsg->cmnd[2]); 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int pmi = fsg->cmnd[8]; 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check the PMI and LBA fields */ 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pmi > 1 || (pmi == 0 && lba != 0)) { 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[0], curlun->num_sectors - 1); // Max logical block 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[4], 512); // Block length 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 8; 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh) 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 21111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int mscmnd = fsg->cmnd[0]; 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf0 = buf; 21141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int pc, page_code; 21151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int changeable_values, all_pages; 21161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int valid_page = 0; 21171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len, limit; 21181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x08) != 0) { // Mask away DBD 21201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 21211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pc = fsg->cmnd[2] >> 6; 21241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds page_code = fsg->cmnd[2] & 0x3f; 21251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pc == 3) { 21261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED; 21271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds changeable_values = (pc == 1); 21301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds all_pages = (page_code == 0x3f); 21311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write the mode parameter header. Fixed values are: default 21331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * medium type, no cache control (DPOFUA), and no block descriptors. 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The only variable value is the WriteProtect bit. We will fill in 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the mode data length later. */ 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 8); 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mscmnd == SC_MODE_SENSE_6) { 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 4; 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds limit = 255; 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // SC_MODE_SENSE_10 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 8; 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds limit = 65535; // Should really be mod_data.buflen 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No block descriptors */ 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The mode pages, in numerical order. The only page we support 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is the Caching page. */ 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (page_code == 0x08 || all_pages) { 21521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds valid_page = 1; 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 0x08; // Page code 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = 10; // Page length 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf+2, 0, 10); // None of the fields are changeable 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!changeable_values) { 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x04; // Write cache enable, 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Read cache not disabled 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // No cache retention priorities 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(&buf[4], 0xffff); // Don't disable prefetch 21621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Minimum prefetch = 0 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(&buf[8], 0xffff); // Maximum prefetch 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(&buf[10], 0xffff); // Maximum prefetch ceiling 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 12; 21671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that a valid page was requested and the mode data length 21701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * isn't too long. */ 21711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = buf - buf0; 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!valid_page || len > limit) { 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store the mode data length */ 21781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mscmnd == SC_MODE_SENSE_6) 21791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf0[0] = len - 1; 21801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(buf0, len - 2); 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_start_stop(struct fsg_dev *fsg) 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 21891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int loej, start; 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mod_data.removable) { 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_COMMAND; 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // int immed = fsg->cmnd[1] & 0x01; 21971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loej = fsg->cmnd[4] & 0x02; 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start = fsg->cmnd[4] & 0x01; 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x01) != 0 || // Mask away Immed 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (fsg->cmnd[4] & ~0x03) != 0) { // Mask LoEj, Start 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!start) { 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Are we allowed to unload the media? */ 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->prevent_medium_removal) { 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "unload attempt prevented\n"); 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED; 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (loej) { // Simulate an unload/eject 22161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 22171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_write(&fsg->filesem); 22181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_backing_file(curlun); 22191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_write(&fsg->filesem); 22201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 22231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Our emulation doesn't support mounting; the medium is 22251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * available for use as soon as it is loaded. */ 22261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!backing_file_is_open(curlun)) { 22271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_MEDIUM_NOT_PRESENT; 22281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 22321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_prevent_allow(struct fsg_dev *fsg) 22371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 22391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int prevent; 22401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mod_data.removable) { 22421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_COMMAND; 22431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prevent = fsg->cmnd[4] & 0x01; 22471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[4] & ~0x01) != 0) { // Mask away Prevent 22481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 22491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->prevent_medium_removal && !prevent) 22531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_sub(curlun); 22541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->prevent_medium_removal = prevent; 22551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_read_format_capacities(struct fsg_dev *fsg, 22601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh) 22611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 22631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 22641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = buf[1] = buf[2] = 0; 22661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = 8; // Only the Current/Maximum Capacity Descriptor 22671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 4; 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[0], curlun->num_sectors); // Number of blocks 22701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[4], 512); // Block length 22711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[4] = 0x02; // Current capacity 22721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 12; 22731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh) 22771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 22791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We don't support MODE SELECT */ 22811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_COMMAND; 22821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 22871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int halt_bulk_in_endpoint(struct fsg_dev *fsg) 22891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 22911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = fsg_set_halt(fsg, fsg->bulk_in); 22931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc == -EAGAIN) 22941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "delayed bulk-in endpoint halt\n"); 22951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (rc != 0) { 22961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -EAGAIN) { 2297b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven WARNING(fsg, "usb_ep_set_halt -> %d\n", rc); 22981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 22991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 23001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for a short time and then try again */ 23031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msleep_interruptible(100) != 0) 23041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 23051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_set_halt(fsg->bulk_in); 23061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 23081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231062fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopostatic int wedge_bulk_in_endpoint(struct fsg_dev *fsg) 231162fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo{ 231262fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo int rc; 231362fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo 231462fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo DBG(fsg, "bulk-in set wedge\n"); 231562fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo rc = usb_ep_set_wedge(fsg->bulk_in); 231662fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo if (rc == -EAGAIN) 231762fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo VDBG(fsg, "delayed bulk-in endpoint wedge\n"); 231862fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo while (rc != 0) { 231962fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo if (rc != -EAGAIN) { 2320b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven WARNING(fsg, "usb_ep_set_wedge -> %d\n", rc); 232162fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo rc = 0; 232262fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo break; 232362fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo } 232462fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo 232562fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo /* Wait for a short time and then try again */ 232662fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo if (msleep_interruptible(100) != 0) 232762fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo return -EINTR; 232862fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo rc = usb_ep_set_wedge(fsg->bulk_in); 232962fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo } 233062fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo return rc; 233162fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo} 233262fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo 23331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pad_with_zeros(struct fsg_dev *fsg) 23341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; 23361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 nkeep = bh->inreq->length; 23371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 nsend; 23381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 23391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; // For the first iteration 23411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left = nkeep + fsg->residue; 23421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fsg->usb_amount_left > 0) { 23431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to be free */ 23451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 234679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 234779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 23481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 23491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nsend = min(fsg->usb_amount_left, (u32) mod_data.buflen); 23521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(bh->buf + nkeep, 0, nsend - nkeep); 23531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = nsend; 23541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 23551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 23561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 23571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill = bh->next; 23581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left -= nsend; 23591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nkeep = 0; 23601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 23621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int throw_away_data(struct fsg_dev *fsg) 23651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 23671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount; 23681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 23691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY || 23711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left > 0) { 23721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Throw away the data in a filled buffer */ 23741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_FULL) { 2375a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_rmb(); 23761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 23771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_drain = bh->next; 23781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* A short packet or an error ends everything */ 23801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq->actual != bh->outreq->length || 23811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->status != 0) { 23821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); 23831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 23841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 23861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Try to submit another request if we need one */ 23891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 23901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) { 23911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(fsg->usb_amount_left, 23921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (u32) mod_data.buflen); 23931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* amount is always divisible by 512, hence by 23951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the bulk-out maxpacket size */ 23961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->length = bh->bulk_out_intended_length = 23971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount; 239870ffe6e14d7c5db84b92841471ce6fd0200010cdAlan Stern bh->outreq->short_not_ok = 1; 23991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_out, bh->outreq, 24001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->outreq_busy, &bh->state); 24011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left -= amount; 24031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 24041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Otherwise wait for something to happen */ 240779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 240879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 24091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 24101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 24121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 24131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int finish_reply(struct fsg_dev *fsg) 24161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; 24181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 24191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (fsg->data_dir) { 24211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_NONE: 24221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // Nothing to send 24231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If we don't know whether the host wants to read or write, 24251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this must be CB or CBI with an unknown command. We mustn't 24261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * try to send or receive any data. So stall both bulk pipes 24271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if we can and wait for a reset. */ 24281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_UNKNOWN: 24291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall) { 24301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 24311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = halt_bulk_in_endpoint(fsg); 24321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 24341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* All but the last buffer of data must have already been sent */ 24361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_TO_HOST: 24371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size == 0) 24381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Nothing to send 24391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If there's no residue, simply send the last buffer */ 24411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (fsg->residue == 0) { 24421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 24431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 24441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 24451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* There is a residue. For CB and CBI, simply mark the end 24491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the data with a short packet. However, if we are 24501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allowed to stall, there was no data at all (residue == 24511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * data_size), and the command failed (invalid LUN or 24521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sense data is set), then halt the bulk-in endpoint 24531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * instead. */ 24541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (!transport_is_bbb()) { 24551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall && 24561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue == fsg->data_size && 24571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) { 24581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 24591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = halt_bulk_in_endpoint(fsg); 24601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 24611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 1; 24621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 24631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 24641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For Bulk-only, if we're allowed to stall then send the 24691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * short packet and halt the bulk-in endpoint. If we can't 24701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * stall, pad out the remaining data with 0's. */ 24711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 24721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall) { 24731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 1; 24741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 24751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 24761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = halt_bulk_in_endpoint(fsg); 24781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 24791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = pad_with_zeros(fsg); 24801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 24821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We have processed all we want from the data the host has sent. 24841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * There may still be outstanding bulk-out requests. */ 24851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_FROM_HOST: 24861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->residue == 0) 24871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Nothing to receive 24881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the host stop sending unexpectedly early? */ 24901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (fsg->short_packet_received) { 24911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); 24921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINTR; 24931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We haven't processed all the incoming data. Even though 24961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we may be allowed to stall, doing so would cause a race. 24971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The controller may already have ACK'ed all the remaining 24981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bulk-out packets, in which case the host wouldn't see a 24991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * STALL. Not realizing the endpoint was halted, it wouldn't 25001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clear the halt -- leading to problems later on. */ 25011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 25021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (mod_data.can_stall) { 25031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 25041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); 25051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINTR; 25061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 25081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't stall. Read in the excess data and throw it 25101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * all away. */ 25111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 25121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = throw_away_data(fsg); 25131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 25141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 25161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 25171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int send_status(struct fsg_dev *fsg) 25201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 25221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 25231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 25241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 status = USB_STATUS_PASS; 25251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sd, sdinfo = 0; 25261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available */ 25281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 25291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 253079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 253179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 25321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 25331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun) { 25361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = curlun->sense_data; 25371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdinfo = curlun->sense_data_info; 25381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (fsg->bad_lun_okay) 25391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_NO_SENSE; 25401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 25411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; 25421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->phase_error) { 25441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "sending phase-error status\n"); 25451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = USB_STATUS_PHASE_ERROR; 25461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_INVALID_COMMAND; 25471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (sd != SS_NO_SENSE) { 25481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "sending command-failure status\n"); 25491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = USB_STATUS_FAIL; 25501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;" 25511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds " info x%x\n", 25521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SK(sd), ASC(sd), ASCQ(sd), sdinfo); 25531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 25567ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct bulk_cs_wrap *csw = bh->buf; 25571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store and send the Bulk-only CSW */ 25591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Signature = __constant_cpu_to_le32(USB_BULK_CS_SIG); 25601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Tag = fsg->tag; 25611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Residue = cpu_to_le32(fsg->residue); 25621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Status = status; 25631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = USB_BULK_CS_WRAP_LEN; 25651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 25661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 25671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 25681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (mod_data.transport_type == USB_PR_CB) { 25701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Control-Bulk transport has no status phase! */ 25721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 25731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // USB_PR_CBI 25757ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct interrupt_data *buf = bh->buf; 25761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store and send the Interrupt data. UFI sends the ASC 25781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and ASCQ bytes. Everything else sends a Type (which 25791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is always 0) and the status Value. */ 25801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.protocol_type == USB_SC_UFI) { 25811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bType = ASC(sd); 25821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bValue = ASCQ(sd); 25831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 25841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bType = 0; 25851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bValue = status; 25861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->length = CBI_INTERRUPT_DATA_LEN; 25881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_buffhd = bh; // Point to the right buffhd 25901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->buf = bh->inreq->buf; 25911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->context = bh; 25921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->intr_in, fsg->intreq, 25931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &fsg->intreq_busy, &bh->state); 25941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 25971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 25981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 25991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 26021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the command is properly formed and whether its data size 26041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and direction agree with the values we already have. */ 26051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int check_command(struct fsg_dev *fsg, int cmnd_size, 26061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum data_direction data_dir, unsigned int mask, 26071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int needs_medium, const char *name) 26081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 26101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int lun = fsg->cmnd[1] >> 5; 26111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static const char dirletter[4] = {'u', 'o', 'i', 'n'}; 26121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char hdlen[20]; 26131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 26141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Adjust the expected cmnd_size for protocol encapsulation padding. 26161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Transparent SCSI doesn't pad. */ 26171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (protocol_is_scsi()) 26181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; 26191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* There's some disagreement as to whether RBC pads commands or not. 26211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We'll play it safe and accept either form. */ 26221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (mod_data.protocol_type == USB_SC_RBC) { 26231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd_size == 12) 26241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmnd_size = 12; 26251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* All the other protocols pad to 12 bytes */ 26271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 26281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmnd_size = 12; 26291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlen[0] = 0; 26311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_dir != DATA_DIR_UNKNOWN) 26321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir], 26331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size); 26341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n", 26351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name, cmnd_size, dirletter[(int) data_dir], 26361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen); 26371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't reply at all until we know the correct data direction 26391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and size. */ 26401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size_from_cmnd == 0) 26411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_dir = DATA_DIR_NONE; 26421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_dir == DATA_DIR_UNKNOWN) { // CB or CBI 26431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = data_dir; 26441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size = fsg->data_size_from_cmnd; 26451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // Bulk-only 26471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size < fsg->data_size_from_cmnd) { 26481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Host data size < Device data size is a phase error. 26501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Carry out the command, but only transfer as much 26511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as we are allowed. */ 26521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->data_size; 26531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 1; 26541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue = fsg->usb_amount_left = fsg->data_size; 26571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Conflicting data directions is a phase error */ 26591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) { 26601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 1; 26611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 26621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Verify the length of the command itself */ 26651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cmnd_size != fsg->cmnd_size) { 26661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Special case workaround: MS-Windows issues REQUEST SENSE 26681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with cbw->Length == 12 (it should be 6). */ 26691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] == SC_REQUEST_SENSE && fsg->cmnd_size == 12) 26701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmnd_size = fsg->cmnd_size; 26711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 26721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 1; 26731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 26741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2677d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern /* Check that the LUN values are consistent */ 26781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 26791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->lun != lun) 26801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "using LUN %d from CBW, " 26811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "not LUN %d from CDB\n", 26821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->lun, lun); 26831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 26841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->lun = lun; // Use LUN from the command 26851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check the LUN */ 26871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->lun >= 0 && fsg->lun < fsg->nluns) { 26881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->curlun = curlun = &fsg->luns[fsg->lun]; 26891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] != SC_REQUEST_SENSE) { 26901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_NO_SENSE; 26911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = 0; 26926174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 0; 26931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 26951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->curlun = curlun = NULL; 26961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bad_lun_okay = 0; 26971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INQUIRY and REQUEST SENSE commands are explicitly allowed 26991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to use unsupported LUNs; all others may not. */ 27001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] != SC_INQUIRY && 27011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[0] != SC_REQUEST_SENSE) { 27021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "unsupported LUN %d\n", fsg->lun); 27031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 27041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If a unit attention condition exists, only INQUIRY and 27081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * REQUEST SENSE commands are allowed; anything else must fail. */ 27091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun && curlun->unit_attention_data != SS_NO_SENSE && 27101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[0] != SC_INQUIRY && 27111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[0] != SC_REQUEST_SENSE) { 27121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = curlun->unit_attention_data; 27131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = SS_NO_SENSE; 27141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 27151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that only command bytes listed in the mask are non-zero */ 27181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[1] &= 0x1f; // Mask away the LUN 27191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 1; i < cmnd_size; ++i) { 27201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[i] && !(mask & (1 << i))) { 27211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun) 27221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 27231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 27241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the medium isn't mounted and the command needs to access 27281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it, return an error. */ 27291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun && !backing_file_is_open(curlun) && needs_medium) { 27301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_MEDIUM_NOT_PRESENT; 27311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 27321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 27351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 27361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_scsi_command(struct fsg_dev *fsg) 27391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 27401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 27411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 27421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int reply = -EINVAL; 27431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 27441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char unknown[16]; 27451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_cdb(fsg); 27471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available for data or status */ 27491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill; 27501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 275179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 275279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 27531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 275479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 27551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 0; 27561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->short_packet_received = 0; 27571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); // We're using the backing file 27591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (fsg->cmnd[0]) { 27601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_INQUIRY: 27621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 27631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 27641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<4), 0, 27651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "INQUIRY")) == 0) 27661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_inquiry(fsg, bh); 27671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SELECT_6: 27701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 27711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST, 27721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<4), 0, 27731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SELECT(6)")) == 0) 27741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_select(fsg, bh); 27751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SELECT_10: 27781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]); 27791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST, 27801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (3<<7), 0, 27811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SELECT(10)")) == 0) 27821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_select(fsg, bh); 27831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SENSE_6: 27861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 27871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 27881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<2) | (1<<4), 0, 27891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SENSE(6)")) == 0) 27901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_sense(fsg, bh); 27911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SENSE_10: 27941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]); 27951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 27961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<2) | (3<<7), 0, 27971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SENSE(10)")) == 0) 27981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_sense(fsg, bh); 27991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_PREVENT_ALLOW_MEDIUM_REMOVAL: 28021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_NONE, 28041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<4), 0, 28051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "PREVENT-ALLOW MEDIUM REMOVAL")) == 0) 28061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_prevent_allow(fsg); 28071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_6: 28101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = fsg->cmnd[4]; 28111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9; 28121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 28131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (7<<1) | (1<<4), 1, 28141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ(6)")) == 0) 28151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read(fsg); 28161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_10: 28191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9; 28201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 28211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (3<<7), 1, 28221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ(10)")) == 0) 28231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read(fsg); 28241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_12: 28271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9; 28281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST, 28291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (0xf<<6), 1, 28301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ(12)")) == 0) 28311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read(fsg); 28321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_CAPACITY: 28351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 8; 28361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 28371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (0xf<<2) | (1<<8), 1, 28381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ CAPACITY")) == 0) 28391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read_capacity(fsg, bh); 28401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_FORMAT_CAPACITIES: 28431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]); 28441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 28451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (3<<7), 1, 28461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ FORMAT CAPACITIES")) == 0) 28471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read_format_capacities(fsg, bh); 28481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_REQUEST_SENSE: 28511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 28521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 28531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<4), 0, 28541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "REQUEST SENSE")) == 0) 28551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_request_sense(fsg, bh); 28561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_START_STOP_UNIT: 28591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_NONE, 28611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<4), 0, 28621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "START-STOP UNIT")) == 0) 28631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_start_stop(fsg); 28641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_SYNCHRONIZE_CACHE: 28671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_NONE, 28691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (0xf<<2) | (3<<7), 1, 28701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "SYNCHRONIZE CACHE")) == 0) 28711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_synchronize_cache(fsg); 28721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_TEST_UNIT_READY: 28751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = check_command(fsg, 6, DATA_DIR_NONE, 28771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, 1, 28781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "TEST UNIT READY"); 28791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Although optional, this command is used by MS-Windows. We 28821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * support a minimal version: BytChk must be 0. */ 28831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_VERIFY: 28841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_NONE, 28861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (3<<7), 1, 28871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "VERIFY")) == 0) 28881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_verify(fsg); 28891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_WRITE_6: 28921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = fsg->cmnd[4]; 28931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9; 28941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST, 28951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (7<<1) | (1<<4), 1, 28961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "WRITE(6)")) == 0) 28971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_write(fsg); 28981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_WRITE_10: 29011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9; 29021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST, 29031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (3<<7), 1, 29041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "WRITE(10)")) == 0) 29051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_write(fsg); 29061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 29071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_WRITE_12: 29091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9; 29101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST, 29111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (0xf<<6), 1, 29121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "WRITE(12)")) == 0) 29131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_write(fsg); 29141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 29151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some mandatory commands that we recognize but don't implement. 29171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * They don't mean much in this setting. It's left as an exercise 29181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for anyone interested to implement RESERVE and RELEASE in terms 29191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of Posix locks. */ 29201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_FORMAT_UNIT: 29211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_RELEASE: 29221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_RESERVE: 29231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_SEND_DIAGNOSTIC: 29241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Fall through 29251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 29271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 29281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]); 29291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, fsg->cmnd_size, 29301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_UNKNOWN, 0xff, 0, unknown)) == 0) { 29311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->curlun->sense_data = SS_INVALID_COMMAND; 29321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = -EINVAL; 29331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 29351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 29371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (reply == -EINTR || signal_pending(current)) 29391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 29401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the single reply buffer for finish_reply() */ 29421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (reply == -EINVAL) 29431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = 0; // Error reply length 29441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) { 29451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = min((u32) reply, fsg->data_size_from_cmnd); 29461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = reply; 29471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 29481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue -= reply; 29491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } // Otherwise it's already set 29501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 29521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 29561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh) 29581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = bh->outreq; 29607ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct bulk_cb_wrap *cbw = req->buf; 29611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2962b950bdbc67041412cb042e404938667204c7902cAlan Stern /* Was this a real packet? Should it be ignored? */ 2963b950bdbc67041412cb042e404938667204c7902cAlan Stern if (req->status || test_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags)) 29641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 29651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is the CBW valid? */ 29671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->actual != USB_BULK_CB_WRAP_LEN || 29681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cbw->Signature != __constant_cpu_to_le32( 29691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_BULK_CB_SIG)) { 29701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "invalid CBW: len %u sig 0x%x\n", 29711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->actual, 29721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds le32_to_cpu(cbw->Signature)); 29731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2974b950bdbc67041412cb042e404938667204c7902cAlan Stern /* The Bulk-only spec says we MUST stall the IN endpoint 2975b950bdbc67041412cb042e404938667204c7902cAlan Stern * (6.6.1), so it's unavoidable. It also says we must 2976b950bdbc67041412cb042e404938667204c7902cAlan Stern * retain this state until the next reset, but there's 2977b950bdbc67041412cb042e404938667204c7902cAlan Stern * no way to tell the controller driver it should ignore 2978b950bdbc67041412cb042e404938667204c7902cAlan Stern * Clear-Feature(HALT) requests. 2979b950bdbc67041412cb042e404938667204c7902cAlan Stern * 2980b950bdbc67041412cb042e404938667204c7902cAlan Stern * We aren't required to halt the OUT endpoint; instead 2981b950bdbc67041412cb042e404938667204c7902cAlan Stern * we can simply accept and discard any data received 2982b950bdbc67041412cb042e404938667204c7902cAlan Stern * until the next reset. */ 298362fd2cac5bf5cf9e6fcb2fc40b32e7271e605c53David Lopo wedge_bulk_in_endpoint(fsg); 2984b950bdbc67041412cb042e404938667204c7902cAlan Stern set_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); 29851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 29861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is the CBW meaningful? */ 29891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cbw->Lun >= MAX_LUNS || cbw->Flags & ~USB_BULK_IN_FLAG || 299012943f097e5a4a0550f52f98ab8f476435e2ce15Alan Stern cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) { 29911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, " 29921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "cmdlen %u\n", 29931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cbw->Lun, cbw->Flags, cbw->Length); 29941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can do anything we want here, so let's stall the 29961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bulk pipes if we are allowed to. */ 29971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall) { 29981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 29991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds halt_bulk_in_endpoint(fsg); 30001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 30021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Save the command for later */ 30051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd_size = cbw->Length; 30061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size); 30071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cbw->Flags & USB_BULK_IN_FLAG) 30081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_TO_HOST; 30091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 30101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_FROM_HOST; 30111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size = le32_to_cpu(cbw->DataTransferLength); 30121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size == 0) 30131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_NONE; 30141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->lun = cbw->Lun; 30151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->tag = cbw->Tag; 30161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 30171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_next_command(struct fsg_dev *fsg) 30211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 30231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 30241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 30261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available */ 30281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 30291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 303079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 303179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 30321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 303379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 30341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Queue a request to read a Bulk-only CBW */ 30361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN); 303770ffe6e14d7c5db84b92841471ce6fd0200010cdAlan Stern bh->outreq->short_not_ok = 1; 30381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_out, bh->outreq, 30391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->outreq_busy, &bh->state); 30401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We will drain the buffer in software, which means we 30421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * can reuse it for the next filling. No need to advance 30431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * next_buffhd_to_fill. */ 30441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the CBW to arrive */ 30461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_FULL) { 304779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 304879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 30491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 305079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 3051a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_rmb(); 30521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = received_cbw(fsg, bh); 30531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 30541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // USB_PR_CB or USB_PR_CBI 30561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next command to arrive */ 30581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fsg->cbbuf_cmnd_size == 0) { 305979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 306079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 30611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 306279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 30631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is the previous status interrupt request still busy? 30651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The host is allowed to skip reading the status, 30661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * so we must cancel it. */ 30671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intreq_busy) 30681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->intr_in, fsg->intreq); 30691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Copy the command and mark the buffer empty */ 30711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_UNKNOWN; 30721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 30731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd_size = fsg->cbbuf_cmnd_size; 30741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size); 30751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cbbuf_cmnd_size = 0; 30761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 30771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 30791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 30831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep, 30851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_endpoint_descriptor *d) 30861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 30881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; 30901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_enable(ep, d); 30911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) 30921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc); 30931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 30941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep, 30971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request **preq) 30981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *preq = usb_ep_alloc_request(ep, GFP_ATOMIC); 31001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (*preq) 31011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 31021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "can't allocate request for %s\n", ep->name); 31031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 31041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 31051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 31071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reset interface setting and re-init endpoint state (toggle etc). 31081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Call with altsetting < 0 to disable the interface. The only other 31091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * available altsetting is 0, which enables the interface. 31101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 31111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_set_interface(struct fsg_dev *fsg, int altsetting) 31121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 31131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 31141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 31151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_endpoint_descriptor *d; 31161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->running) 31181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "reset interface\n"); 31191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsreset: 31211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Deallocate the requests */ 31221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 31231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = &fsg->buffhds[i]; 31241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->inreq) { 31261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->bulk_in, bh->inreq); 31271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq = NULL; 31281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq) { 31301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->bulk_out, bh->outreq); 31311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq = NULL; 31321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intreq) { 31351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->intr_in, fsg->intreq); 31361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq = NULL; 31371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Disable the endpoints */ 31401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_in_enabled) { 31411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_disable(fsg->bulk_in); 31421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_in_enabled = 0; 31431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_out_enabled) { 31451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_disable(fsg->bulk_out); 31461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out_enabled = 0; 31471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intr_in_enabled) { 31491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_disable(fsg->intr_in); 31501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_in_enabled = 0; 31511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->running = 0; 31541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (altsetting < 0 || rc != 0) 31551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 31561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "set interface %d\n", altsetting); 31581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Enable the endpoints */ 31601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = ep_desc(fsg->gadget, &fs_bulk_in_desc, &hs_bulk_in_desc); 31611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0) 31621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_in_enabled = 1; 31641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = ep_desc(fsg->gadget, &fs_bulk_out_desc, &hs_bulk_out_desc); 31661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0) 31671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out_enabled = 1; 31691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize); 3170b950bdbc67041412cb042e404938667204c7902cAlan Stern clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags); 31711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_cbi()) { 31731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = ep_desc(fsg->gadget, &fs_intr_in_desc, &hs_intr_in_desc); 31741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0) 31751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_in_enabled = 1; 31771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate the requests */ 31801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 31811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = &fsg->buffhds[i]; 31821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq)) != 0) 31841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq)) != 0) 31861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->buf = bh->outreq->buf = bh->buf; 31881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->context = bh->outreq->context = bh; 31891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->complete = bulk_in_complete; 31901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->complete = bulk_out_complete; 31911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_cbi()) { 31931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0) 31941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->complete = intr_in_complete; 31961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->running = 1; 31991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) 32001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED; 32011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 32021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 32031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 32061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Change our operational configuration. This code must agree with the code 32071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that returns config descriptors, and with interface altsetting code. 32081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 32091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It's also responsible for power management interactions. Some 32101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * configurations might not work with our current power sources. 32111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * For now we just assume the gadget is always self-powered. 32121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 32131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_set_config(struct fsg_dev *fsg, u8 new_config) 32141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 32151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 32161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Disable the single interface */ 32181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->config != 0) { 32191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "reset config\n"); 32201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->config = 0; 32211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = do_set_interface(fsg, -1); 32221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Enable the interface */ 32251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_config != 0) { 32261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->config = new_config; 32271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = do_set_interface(fsg, 0)) != 0) 32281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->config = 0; // Reset on errors 32291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 32301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *speed; 32311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (fsg->gadget->speed) { 32331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: speed = "low"; break; 32341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: speed = "full"; break; 32351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: speed = "high"; break; 32361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: speed = "?"; break; 32371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, "%s speed config #%d\n", speed, fsg->config); 32391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 32421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 32431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 32461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void handle_exception(struct fsg_dev *fsg) 32481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 32491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 32501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int sig; 32511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 32521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int num_active; 32531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 32541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum fsg_state old_state; 32551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 new_config; 32561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 32571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int exception_req_tag; 32581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 32591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear the existing signals. Anything but SIGUSR1 is converted 32611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * into a high-priority EXIT exception. */ 32621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 32638cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov sig = dequeue_signal_lock(current, ¤t->blocked, &info); 32641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sig) 32651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 32661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sig != SIGUSR1) { 32671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state < FSG_STATE_EXIT) 32681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "Main thread exiting on signal\n"); 32691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_EXIT); 32701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Cancel all the pending transfers */ 32741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intreq_busy) 32751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->intr_in, fsg->intreq); 32761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 32771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = &fsg->buffhds[i]; 32781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->inreq_busy) 32791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->bulk_in, bh->inreq); 32801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq_busy) 32811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->bulk_out, bh->outreq); 32821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait until everything is idle */ 32851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 32861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds num_active = fsg->intreq_busy; 32871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 32881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = &fsg->buffhds[i]; 32891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds num_active += bh->inreq_busy + bh->outreq_busy; 32901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (num_active == 0) 32921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 32931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sleep_thread(fsg)) 32941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 32951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the controller's fifos */ 32981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_in_enabled) 32991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(fsg->bulk_in); 33001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_out_enabled) 33011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(fsg->bulk_out); 33021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intr_in_enabled) 33031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(fsg->intr_in); 33041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Reset the I/O buffer states and pointers, the SCSI 33061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * state, and the exception. Then invoke the handler. */ 33071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 33081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 33101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = &fsg->buffhds[i]; 33111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 33121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain = 33141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &fsg->buffhds[0]; 33151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds exception_req_tag = fsg->exception_req_tag; 33171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_config = fsg->new_config; 33181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old_state = fsg->state; 33191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old_state == FSG_STATE_ABORT_BULK_OUT) 33211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_STATUS_PHASE; 33221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 33231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 33241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 33251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->prevent_medium_removal = 0; 33261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = curlun->unit_attention_data = 33271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_NO_SENSE; 33281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = 0; 33296174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 0; 33301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_IDLE; 33321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 33341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Carry out any extra actions required for the exception */ 33361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (old_state) { 33371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 33381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_ABORT_BULK_OUT: 33411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds send_status(fsg); 33421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 33431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state == FSG_STATE_STATUS_PHASE) 33441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_IDLE; 33451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 33461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_RESET: 33491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* In case we were forced against our will to halt a 33501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bulk endpoint, clear the halt now. (The SuperH UDC 33511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * requires this.) */ 3352b950bdbc67041412cb042e404938667204c7902cAlan Stern if (test_and_clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags)) 33531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_clear_halt(fsg->bulk_in); 33541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 33561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->ep0_req_tag == exception_req_tag) 33571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep0_queue(fsg); // Complete the status stage 33581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (transport_is_cbi()) 33601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds send_status(fsg); // Status by interrupt pipe 33611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Technically this should go here, but it would only be 33631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a waste of time. Ditto for the INTERFACE_CHANGE and 33641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONFIG_CHANGE cases. */ 33651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // for (i = 0; i < fsg->nluns; ++i) 33661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED; 33671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_INTERFACE_CHANGE: 33701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = do_set_interface(fsg, 0); 33711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->ep0_req_tag != exception_req_tag) 33721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0) // STALL on errors 33741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->ep0); 33751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else // Complete the status stage 33761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep0_queue(fsg); 33771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_CONFIG_CHANGE: 33801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = do_set_config(fsg, new_config); 33811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->ep0_req_tag != exception_req_tag) 33821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0) // STALL on errors 33841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->ep0); 33851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else // Complete the status stage 33861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep0_queue(fsg); 33871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_DISCONNECT: 33901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_all(fsg); 33911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_set_config(fsg, 0); // Unconfigured state 33921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_EXIT: 33951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_TERMINATED: 33961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_set_config(fsg, 0); // Free resources 33971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 33981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_TERMINATED; // Stop the thread 33991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 34011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 34031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 34061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsg_main_thread(void *fsg_) 34081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34097ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = fsg_; 34101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allow the thread to be killed by a signal, but set the signal mask 34121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to block everything but INT, TERM, KILL, and USR1. */ 34138cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGINT); 34148cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGTERM); 34158cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGKILL); 34168cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGUSR1); 34171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3418831441862956fffa17b9801db37e6ea1650b0f69Rafael J. Wysocki /* Allow the thread to be frozen */ 3419831441862956fffa17b9801db37e6ea1650b0f69Rafael J. Wysocki set_freezable(); 3420831441862956fffa17b9801db37e6ea1650b0f69Rafael J. Wysocki 34211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Arrange for userspace references to be interpreted as kernel 34221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pointers. That way we can pass a kernel pointer to a routine 34231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that expects a __user pointer and it will work okay. */ 34241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs(get_ds()); 34251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The main loop */ 34271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fsg->state != FSG_STATE_TERMINATED) { 34281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (exception_in_progress(fsg) || signal_pending(current)) { 34291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds handle_exception(fsg); 34301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->running) { 34341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sleep_thread(fsg); 34351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (get_next_command(fsg)) 34391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 34421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!exception_in_progress(fsg)) 34431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_DATA_PHASE; 34441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (do_scsi_command(fsg) || finish_reply(fsg)) 34471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 34501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!exception_in_progress(fsg)) 34511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_STATUS_PHASE; 34521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (send_status(fsg)) 34551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 34581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!exception_in_progress(fsg)) 34591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_IDLE; 34601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 346322efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern spin_lock_irq(&fsg->lock); 34641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->thread_task = NULL; 346522efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern spin_unlock_irq(&fsg->lock); 34661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* In case we are exiting because of a signal, unregister the 34681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * gadget driver and close the backing file. */ 34691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) { 34701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_gadget_unregister_driver(&fsg_driver); 34711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_all_backing_files(fsg); 34721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let the unbind and cleanup routines know the thread has exited */ 34751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complete_and_exit(&fsg->thread_notifier, 0); 34761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 34771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 34801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* If the next two routines are called while the gadget is registered, 34821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the caller must own fsg->filesem for writing. */ 34831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int open_backing_file(struct lun *curlun, const char *filename) 34851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ro; 34871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp = NULL; 34881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = -EINVAL; 34891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct inode *inode = NULL; 34901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t size; 34911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t num_sectors; 34921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* R/W if we can, R/O if we must */ 34941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = curlun->ro; 34951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ro) { 34961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0); 34971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (-EROFS == PTR_ERR(filp)) 34981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 34991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ro) 35011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0); 35021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(filp)) { 35031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "unable to open backing file: %s\n", filename); 35041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(filp); 35051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(filp->f_mode & FMODE_WRITE)) 35081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 35091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351033cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek if (filp->f_path.dentry) 351133cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek inode = filp->f_path.dentry->d_inode; 35121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (inode && S_ISBLK(inode->i_mode)) { 35131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev_read_only(inode->i_bdev)) 35141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 35151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (!inode || !S_ISREG(inode->i_mode)) { 35161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "invalid file type: %s\n", filename); 35171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If we can't read the file, it's no good. 35211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we can't write the file, use it read-only. */ 35221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!filp->f_op || !(filp->f_op->read || filp->f_op->aio_read)) { 35231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "file not readable: %s\n", filename); 35241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(filp->f_op->write || filp->f_op->aio_write)) 35271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 35281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = i_size_read(inode->i_mapping->host); 35301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (size < 0) { 35311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "unable to find file size: %s\n", filename); 35321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = (int) size; 35331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds num_sectors = size >> 9; // File size in 512-byte sectors 35361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (num_sectors == 0) { 35371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "file too small: %s\n", filename); 35381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ETOOSMALL; 35391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_file(filp); 35431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->ro = ro; 35441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp = filp; 35451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->file_length = size; 35461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->num_sectors = num_sectors; 35471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "open backing file: %s\n", filename); 35481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 35491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 35511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp_close(filp, current->files); 35521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 35531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_backing_file(struct lun *curlun) 35571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->filp) { 35591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "close backing file\n"); 35601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fput(curlun->filp); 35611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp = NULL; 35621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_all_backing_files(struct fsg_dev *fsg) 35661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 35681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) 35701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_backing_file(&fsg->luns[i]); 35711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 357410523b3b82456e416cbaffcc24ea2246980aa746Yani Ioannoustatic ssize_t show_ro(struct device *dev, struct device_attribute *attr, char *buf) 35751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 35771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sprintf(buf, "%d\n", curlun->ro); 35791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 358179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic ssize_t show_file(struct device *dev, struct device_attribute *attr, 358279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern char *buf) 35831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 35857ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 35861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *p; 35871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t rc; 35881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); 35901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { // Get the complete pathname 3591cf28b4863f9ee8f122e8ff3ac0d403e07ba9c6d9Jan Blunck p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1); 35921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 35931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = PTR_ERR(p); 35941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 35951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = strlen(p); 35961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memmove(buf, p, rc); 35971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[rc] = '\n'; // Add a newline 35981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[++rc] = 0; 35991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // No file, return 0 bytes 36011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *buf = 0; 36021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 36031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 36051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 36061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 360979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic ssize_t store_ro(struct device *dev, struct device_attribute *attr, 361079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern const char *buf, size_t count) 36111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t rc = count; 36131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 36147ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 36151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 36161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sscanf(buf, "%d", &i) != 1) 36181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 36191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allow the write-enable status to change only while the backing file 36211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is closed. */ 36221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); 36231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { 36241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "read-only status change prevented\n"); 36251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EBUSY; 36261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 36271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->ro = !!i; 36281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "read-only status set to %d\n", curlun->ro); 36291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 36311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 36321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 363479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic ssize_t store_file(struct device *dev, struct device_attribute *attr, 363579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern const char *buf, size_t count) 36361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 36387ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 36391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 36401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->prevent_medium_removal && backing_file_is_open(curlun)) { 36421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "eject attempt prevented\n"); 36431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; // "Door is locked" 36441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Remove a trailing newline */ 36471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > 0 && buf[count-1] == '\n') 36481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((char *) buf)[count-1] = 0; // Ugh! 36491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Eject current medium */ 36511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_write(&fsg->filesem); 36521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { 36531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_backing_file(curlun); 36541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT; 36551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Load new medium */ 36581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > 0 && buf[0]) { 36591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = open_backing_file(curlun, buf); 36601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc == 0) 36611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = 36621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_NOT_READY_TO_READY_TRANSITION; 36631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_write(&fsg->filesem); 36651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (rc < 0 ? rc : count); 36661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The write permissions and store_xxx pointers are set in fsg_bind() */ 36701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEVICE_ATTR(ro, 0444, show_ro, NULL); 36711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEVICE_ATTR(file, 0444, show_file, NULL); 36721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 36751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 367687c4252a35310fdbb2aabb880a39b83f83cadf62Alan Sternstatic void fsg_release(struct kref *ref) 367787c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern{ 367887c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern struct fsg_dev *fsg = container_of(ref, struct fsg_dev, ref); 367987c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern 368087c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kfree(fsg->luns); 368187c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kfree(fsg); 368287c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern} 368387c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern 36841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void lun_release(struct device *dev) 36851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36867ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 36871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 368887c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_put(&fsg->ref, fsg_release); 36891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3691a353678d3136306c1d00f0d2319de1dac8a6b1dbDavid Brownellstatic void /* __init_or_exit */ fsg_unbind(struct usb_gadget *gadget) 36921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 36941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 36951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 36961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 36971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "unbind\n"); 36991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(REGISTERED, &fsg->atomic_bitflags); 37001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unregister the sysfs attribute files and the LUNs */ 37021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 37031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 37041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->registered) { 37051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_remove_file(&curlun->dev, &dev_attr_ro); 37061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_remove_file(&curlun->dev, &dev_attr_file); 37071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_unregister(&curlun->dev); 37081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->registered = 0; 37091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the thread isn't already dead, tell it to exit now */ 37131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state != FSG_STATE_TERMINATED) { 37141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_EXIT); 37151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&fsg->thread_notifier); 37161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The cleanup routine waits for this completion also */ 37181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complete(&fsg->thread_notifier); 37191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Free the data buffers */ 37229d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell for (i = 0; i < NUM_BUFFERS; ++i) 37239d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell kfree(fsg->buffhds[i].buf); 37241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Free the request and buffer for endpoint 0 */ 37261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req) { 37279d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell kfree(req->buf); 37281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->ep0, req); 37291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_gadget_data(gadget, NULL); 37321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 37331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init check_parameters(struct fsg_dev *fsg) 37361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 37371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int prot; 373891e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell int gcnum; 37391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store the default values */ 37411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_type = USB_PR_BULK; 37421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name = "Bulk-only"; 37431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_SCSI; 37441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "Transparent SCSI"; 37451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gadget_is_sh(fsg->gadget)) 37471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.can_stall = 0; 37481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.release == 0xffff) { // Parameter wasn't set 37501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The sa1100 controller is not supported */ 375191e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell if (gadget_is_sa1100(fsg->gadget)) 375291e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell gcnum = -1; 375391e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell else 375491e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell gcnum = usb_gadget_controller_number(fsg->gadget); 375591e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell if (gcnum >= 0) 375691e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell mod_data.release = 0x0300 + gcnum; 37571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 3758b6c63937001889af6fe431aaba97e59d04e028e7Arjan van de Ven WARNING(fsg, "controller '%s' not recognized\n", 37591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->gadget->name); 37601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.release = 0x0399; 37611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot = simple_strtol(mod_data.protocol_parm, NULL, 0); 37651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 37671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) { 37681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Use default setting 37691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) { 37701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_type = USB_PR_CB; 37711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name = "Control-Bulk"; 37721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) { 37731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_type = USB_PR_CBI; 37741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name = "Control-Bulk-Interrupt"; 37751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 37761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm); 37771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 37781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 || 37811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_SCSI) { 37821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Use default setting 37831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 || 37841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_RBC) { 37851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_RBC; 37861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "RBC"; 37871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 || 37881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 || 37891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_8020) { 37901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_8020; 37911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "8020i (ATAPI)"; 37921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 || 37931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_QIC) { 37941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_QIC; 37951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "QIC-157"; 37961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 || 37971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_UFI) { 37981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_UFI; 37991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "UFI"; 38001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 || 38011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_8070) { 38021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_8070; 38031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "8070i"; 38041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 38051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm); 38061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 38071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.buflen &= PAGE_CACHE_MASK; 38101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.buflen <= 0) { 38111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid buflen\n"); 38121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ETOOSMALL; 38131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 38151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 38171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 38181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init fsg_bind(struct usb_gadget *gadget) 38211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 38221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = the_fsg; 38231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 38241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 38251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 38261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *ep; 38271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req; 38281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *pathbuf, *p; 38291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->gadget = gadget; 38311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_gadget_data(gadget, fsg); 38321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0 = gadget->ep0; 38331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0->driver_data = fsg; 38341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = check_parameters(fsg)) != 0) 38361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.removable) { // Enable the store_xxx attributes 38391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_attr_ro.attr.mode = dev_attr_file.attr.mode = 0644; 38401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_attr_ro.store = store_ro; 38411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_attr_file.store = store_file; 38421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Find out how many LUNs there should be */ 38451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = mod_data.nluns; 38461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i == 0) 38472e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell i = max(mod_data.num_filenames, 1u); 38481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i > MAX_LUNS) { 38491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid number of LUNs: %d\n", i); 38501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINVAL; 38511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create the LUNs, open their backing files, and register the 38551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LUN devices in sysfs. */ 3856a922c68732725866c88457026cf06a7620846506Alan Stern fsg->luns = kzalloc(i * sizeof(struct lun), GFP_KERNEL); 38571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->luns) { 38581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOMEM; 38591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->nluns = i; 38621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 38641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 3865aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern curlun->ro = mod_data.ro[i]; 38662de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern curlun->dev.release = lun_release; 38671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->dev.parent = &gadget->dev; 38681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->dev.driver = &fsg_driver.driver; 38691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(&curlun->dev, fsg); 38700031a06e2f07ab0d1bc98c31dbb6801f95f4bf01Kay Sievers dev_set_name(&curlun->dev,"%s-lun%d", 38710031a06e2f07ab0d1bc98c31dbb6801f95f4bf01Kay Sievers dev_name(&gadget->dev), i); 38721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38732de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern if ((rc = device_register(&curlun->dev)) != 0) { 38741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, "failed to register LUN%d: %d\n", i, rc); 38752de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern goto out; 38762de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern } 38772de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern if ((rc = device_create_file(&curlun->dev, 38782de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern &dev_attr_ro)) != 0 || 38792de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern (rc = device_create_file(&curlun->dev, 38802de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern &dev_attr_file)) != 0) { 38812de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern device_unregister(&curlun->dev); 38822de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern goto out; 38831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38842de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern curlun->registered = 1; 38852de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern kref_get(&fsg->ref); 38861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3887aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern if (mod_data.file[i] && *mod_data.file[i]) { 3888aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern if ((rc = open_backing_file(curlun, 3889aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern mod_data.file[i])) != 0) 38901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (!mod_data.removable) { 38921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "no file given for LUN%d\n", i); 38931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINVAL; 38941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Find all the endpoints we will use */ 38991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_autoconfig_reset(gadget); 39001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = usb_ep_autoconfig(gadget, &fs_bulk_in_desc); 39011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 39021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto autoconf_fail; 39031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; // claim the endpoint 39041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_in = ep; 39051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = usb_ep_autoconfig(gadget, &fs_bulk_out_desc); 39071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 39081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto autoconf_fail; 39091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; // claim the endpoint 39101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out = ep; 39111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_cbi()) { 39131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = usb_ep_autoconfig(gadget, &fs_intr_in_desc); 39141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 39151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto autoconf_fail; 39161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; // claim the endpoint 39171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_in = ep; 39181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Fix up the descriptors */ 39211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket; 39221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.idVendor = cpu_to_le16(mod_data.vendor); 39231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.idProduct = cpu_to_le16(mod_data.product); 39241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.bcdDevice = cpu_to_le16(mod_data.release); 39251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = (transport_is_cbi() ? 3 : 2); // Number of endpoints 39271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intf_desc.bNumEndpoints = i; 39281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intf_desc.bInterfaceSubClass = mod_data.protocol_type; 39291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intf_desc.bInterfaceProtocol = mod_data.transport_type; 39301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fs_function[i + FS_FUNCTION_PRE_EP_ENTRIES] = NULL; 39311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39322e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(gadget)) { 39332e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_function[i + HS_FUNCTION_PRE_EP_ENTRIES] = NULL; 39341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39352e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell /* Assume ep0 uses the same maxpacket value for both speeds */ 39362e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket; 39371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39382e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell /* Assume endpoint addresses are the same for both speeds */ 39392e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_bulk_in_desc.bEndpointAddress = 39402e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell fs_bulk_in_desc.bEndpointAddress; 39412e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_bulk_out_desc.bEndpointAddress = 39422e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell fs_bulk_out_desc.bEndpointAddress; 39432e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_intr_in_desc.bEndpointAddress = 39442e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell fs_intr_in_desc.bEndpointAddress; 39452e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell } 39461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39472e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_otg(gadget)) 3948020363384adfb02f26c1c038a127ed3da3d5cf37Tony Lindgren otg_desc.bmAttributes |= USB_OTG_HNP; 39491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOMEM; 39511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate the request and buffer for endpoint 0 */ 39531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req = req = usb_ep_alloc_request(fsg->ep0, GFP_KERNEL); 39541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!req) 39551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 39569d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell req->buf = kmalloc(EP0_BUFSIZE, GFP_KERNEL); 39571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!req->buf) 39581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 39591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->complete = ep0_complete; 39601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate the data buffers */ 39621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 39631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = &fsg->buffhds[i]; 39641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 396514cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern /* Allocate for the bulk-in endpoint. We assume that 396614cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * the buffer will also work with the bulk-out (and 396714cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * interrupt-in) endpoint. */ 39689d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell bh->buf = kmalloc(mod_data.buflen, GFP_KERNEL); 39691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bh->buf) 39701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 39711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->next = bh + 1; 39721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->buffhds[NUM_BUFFERS - 1].next = &fsg->buffhds[0]; 39741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This should reflect the actual gadget power source */ 39761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_gadget_set_selfpowered(gadget); 39771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", 397996b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->sysname, init_utsname()->release, 39801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gadget->name); 39811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* On a real device, serial[] would be loaded from permanent 39831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * storage. We just encode it from the driver version string. */ 39841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < sizeof(serial) - 2; i += 2) { 39851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char c = DRIVER_VERSION[i / 2]; 39861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!c) 39881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 39891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(&serial[i], "%02X", c); 39901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 399222efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern fsg->thread_task = kthread_create(fsg_main_thread, fsg, 399322efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern "file-storage-gadget"); 399422efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern if (IS_ERR(fsg->thread_task)) { 399522efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern rc = PTR_ERR(fsg->thread_task); 39961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 399722efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern } 39981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, DRIVER_DESC ", version: " DRIVER_VERSION "\n"); 40001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, "Number of LUNs=%d\n", fsg->nluns); 40011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); 40031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 40041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 40051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { 40061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = NULL; 40071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pathbuf) { 4008cf28b4863f9ee8f122e8ff3ac0d403e07ba9c6d9Jan Blunck p = d_path(&curlun->filp->f_path, 4009cf28b4863f9ee8f122e8ff3ac0d403e07ba9c6d9Jan Blunck pathbuf, PATH_MAX); 40101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 40111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = NULL; 40121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "ro=%d, file: %s\n", 40141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->ro, (p ? p : "(error)")); 40151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 40171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(pathbuf); 40181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "transport=%s (x%02x)\n", 40201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name, mod_data.transport_type); 40211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "protocol=%s (x%02x)\n", 40221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name, mod_data.protocol_type); 40231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n", 40241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.vendor, mod_data.product, mod_data.release); 40251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "removable=%d, stall=%d, buflen=%u\n", 40261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.removable, mod_data.can_stall, 40271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.buflen); 4028ba25f9dcc4ea6e30839fcab5a5516f2176d5bfedPavel Emelyanov DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task)); 4029a922c68732725866c88457026cf06a7620846506Alan Stern 4030a922c68732725866c88457026cf06a7620846506Alan Stern set_bit(REGISTERED, &fsg->atomic_bitflags); 4031a922c68732725866c88457026cf06a7620846506Alan Stern 4032a922c68732725866c88457026cf06a7620846506Alan Stern /* Tell the thread to start working */ 4033a922c68732725866c88457026cf06a7620846506Alan Stern wake_up_process(fsg->thread_task); 40341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 40351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsautoconf_fail: 40371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "unable to autoconfigure all endpoints\n"); 40381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOTSUPP; 40391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 40411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_TERMINATED; // The thread is dead 40421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_unbind(gadget); 40431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_all_backing_files(fsg); 40441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 40451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 40491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsg_suspend(struct usb_gadget *gadget) 40511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 40531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "suspend\n"); 40551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(SUSPENDED, &fsg->atomic_bitflags); 40561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsg_resume(struct usb_gadget *gadget) 40591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 40611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "resume\n"); 40631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(SUSPENDED, &fsg->atomic_bitflags); 40641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 40681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_gadget_driver fsg_driver = { 40701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_GADGET_DUALSPEED 40711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .speed = USB_SPEED_HIGH, 40721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 40731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .speed = USB_SPEED_FULL, 40741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 40751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .function = (char *) longname, 40761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bind = fsg_bind, 40776bea476cf628eb7bb18a036ac6a8fed1ad319951David Brownell .unbind = fsg_unbind, 40781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .disconnect = fsg_disconnect, 40791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .setup = fsg_setup, 40801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .suspend = fsg_suspend, 40811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .resume = fsg_resume, 40821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .driver = { 40841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = (char *) shortname, 4085d0d5049fb02fc1082c17e08deecd6fed8db549b6Ben Dooks .owner = THIS_MODULE, 40861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // .release = ... 40871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // .suspend = ... 40881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // .resume = ... 40891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 40901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 40911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init fsg_alloc(void) 40941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg; 40961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4097a922c68732725866c88457026cf06a7620846506Alan Stern fsg = kzalloc(sizeof *fsg, GFP_KERNEL); 40981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg) 40991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 41001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&fsg->lock); 41011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_rwsem(&fsg->filesem); 410287c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_init(&fsg->ref); 41031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_completion(&fsg->thread_notifier); 41041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the_fsg = fsg; 41061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 41071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init fsg_init(void) 41111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 41121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 41131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg; 41141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = fsg_alloc()) != 0) 41161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 41171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg = the_fsg; 4118a922c68732725866c88457026cf06a7620846506Alan Stern if ((rc = usb_gadget_register_driver(&fsg_driver)) != 0) 411987c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_put(&fsg->ref, fsg_release); 4120a922c68732725866c88457026cf06a7620846506Alan Stern return rc; 41211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(fsg_init); 41231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit fsg_cleanup(void) 41261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 41271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = the_fsg; 41281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unregister the driver iff the thread hasn't already done so */ 41301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) 41311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_gadget_unregister_driver(&fsg_driver); 41321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the thread to finish up */ 41341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&fsg->thread_notifier); 41351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_all_backing_files(fsg); 413787c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_put(&fsg->ref, fsg_release); 41381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(fsg_cleanup); 4140