hcd.c revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Linus Torvalds 1999 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Johannes Erdfelt 1999-2001 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Andreas Gal 1999 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Gregory P. Smith 1999 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Deti Fliegl 1999 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Randy Dunlap 2000 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright David Brownell 2000-2002 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * option) any later version. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software Foundation, 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_DEBUG 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DEBUG 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/scatterlist.h> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// #define USB_BANDWIDTH_MESSAGES 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_MUTEX (usb_bus_list_lock); /* exported only for usbfs */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating hcd data */ 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_data_lock); 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDeviceProtocol; [ usb 2.0 single TT ]*/ 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idVendor; */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idProduct; */ 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idVendor; */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idProduct; */ 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ascii2utf (char *s, u8 *utf, int utfmax) 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @type: string describing our driver 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_string ( 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int id, 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd, 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *data, 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds) { 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = min (len, 4); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf (buf, sizeof buf, "%s %s %s", system_utsname.sysname, 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds system_utsname.release, hcd->driver->description); 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // unsupported IDs --> "protocol stall" 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPIPE; 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 tbuf [sizeof (struct usb_hub_descriptor)]; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 0; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int patch_wakeup = 0; 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = 0; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = (hcd->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP) 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->remote_wakeup = 0; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->can_wakeup && wValue == USB_DEVICE_REMOTE_WAKEUP) 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->remote_wakeup = 1; 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) { 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->can_wakeup) 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rh_string (wValue & 0xff, hcd, ubuf, wLength); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n < 0) 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = n; 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_SUSPENDED (hcd->state)) 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EAGAIN; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case GetHubStatus: 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case GetPortStatus: 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 4; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case GetHubDescriptor: 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof (struct usb_hub_descriptor); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->hub_control (hcd, 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf, wLength); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength, urb->status); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_save (flags); 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status == -EINPROGRESS) 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hcd_giveback_urb (hcd, urb, NULL); 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Root Hub interrupt transfers are synthesized with a timer. 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Completions are called in_interrupt() but not in_irq(). 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: some root hubs (including common UHCI based designs) can't 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * correctly issue port change IRQs. They're the ones that _need_ a 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * timer; most other root hubs don't. Some systems could save a 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * lot of battery power by eliminating these root hub timer IRQs. 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rh_report_status (unsigned long ptr); 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_status_urb (struct usb_hcd *hcd, struct urb *urb) 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 1 + (urb->dev->maxchild / 8); 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* rh_timer protected by hcd_data_lock */ 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_timer.data || urb->transfer_buffer_length < len) { 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "not queuing rh status urb, stat %d\n", 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status); 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer (&hcd->rh_timer); 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_timer.function = rh_report_status; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_timer.data = (unsigned long) urb; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 2.0 spec says 256msec; this is close enough */ 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_timer.expires = jiffies + HZ/4; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_timer (&hcd->rh_timer); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->hcpriv = hcd; /* nonzero to indicate it's queued */ 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void rh_report_status (unsigned long ptr) 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int length = 0; 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb = (struct urb *) ptr; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_save (flags); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* do nothing if the urb's been unlinked */ 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb->dev 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds || urb->status != -EINPROGRESS 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds || (hcd = urb->dev->bus->hcpriv) == NULL) { 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* complete the status urb, or retrigger the timer */ 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev->state == USB_STATE_CONFIGURED) { 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds length = hcd->driver->hub_status_data ( 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd, urb->transfer_buffer); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (length > 0) { 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_timer.data = 0; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = length; 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = 0; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->hcpriv = NULL; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer (&hcd->rh_timer, jiffies + HZ/4); 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* local irqs are always blocked in completions */ 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (length > 0) 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hcd_giveback_urb (hcd, urb, NULL); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipeint (urb->pipe)) { 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = rh_status_urb (hcd, urb); 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe)) 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* note: always a synchronous unlink */ 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((unsigned long) urb == hcd->rh_timer.data) { 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer_sync (&hcd->rh_timer); 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_timer.data = 0; 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_save (flags); 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->hcpriv = NULL; 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hcd_giveback_urb (hcd, urb, NULL); 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (usb_pipeendpoint(urb->pipe) == 0) { 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&urb->lock); /* from usb_kill_urb */ 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++urb->reject; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&urb->lock); 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_event(usb_kill_urb_queue, 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_read(&urb->use_count) == 0); 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&urb->lock); 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds --urb->reject; 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&urb->lock); 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported only within usbcore */ 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_bus *usb_bus_get (struct usb_bus *bus) 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct class_device *tmp; 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus) 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = class_device_get(&bus->class_dev); 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp) 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return to_usb_bus(tmp); 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported only within usbcore */ 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_bus_put (struct usb_bus *bus) 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bus) 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds class_device_put(&bus->class_dev); 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_host_release(struct class_device *class_dev) 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_bus *bus = to_usb_bus(class_dev); 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bus->release) 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->release(bus); 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct class usb_host_class = { 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "usb_host", 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = &usb_host_release, 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return class_register(&usb_host_class); 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds class_unregister(&usb_host_class); 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->hcpriv = NULL; 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds class_device_initialize(&bus->class_dev); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->class_dev.class = &usb_host_class; 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_alloc_bus - creates a new USB host controller structure 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @op: pointer to a struct usb_operations that this bus structure should use 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Creates a USB host controller bus structure with the specified 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_operations and initializes all the necessary internal objects. 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If no memory is available, NULL is returned. 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The caller should call usb_put_bus() when it is finished with the structure. 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_bus *usb_alloc_bus (struct usb_operations *op) 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_bus *bus; 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus = kmalloc (sizeof *bus, GFP_KERNEL); 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus) 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(bus, 0, sizeof(struct usb_bus)); 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init (bus); 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->op = op; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return bus; 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down (&usb_bus_list_lock); 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (busnum < USB_MAXBUS) { 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (busnum, busmap.busmap); 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = busnum; 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&usb_bus_list_lock); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -E2BIG; 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(bus->class_dev.class_id, BUS_ID_SIZE, "usb%d", busnum); 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->class_dev.dev = bus->controller; 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = class_device_add(&bus->class_dev); 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(busnum, busmap.busmap); 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&usb_bus_list_lock); 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbfs_add_bus (bus); 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_notify_bus_add (bus); 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum); 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down (&usb_bus_list_lock); 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_notify_bus_remove (bus); 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbfs_remove_bus (bus); 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds class_device_del(&bus->class_dev); 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_register_root_hub - called by HCD to register its root hub 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @usb_dev: the usb root hub device to be registered. 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function to register the root hub 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * properly with the USB subsystem. It sets up the device properly in 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device tree and stores the root_hub pointer in the bus structure, 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * then calls usb_new_device() to register the usb device. It also 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * assigns the root hub's USB address (always 1). 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_hcd_register_root_hub (struct usb_device *usb_dev, struct usb_hcd *hcd) 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* hcd->driver->start() reported can_wakeup, probably with 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * assistance from board's boot firmware. 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: normal devices won't enable wakeup by default. 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->can_wakeup) 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "supports USB remote wakeup\n"); 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->remote_wakeup = hcd->can_wakeup; 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down (&usb_bus_list_lock); 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->root_hub = usb_dev; 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->root_hub = NULL; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_lock_device (usb_dev); 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_unlock_device (usb_dev); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->root_hub = NULL; 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL(usb_hcd_register_root_hub); 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = HS_USECS (bytecount); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = HS_USECS_ISO (bytecount); 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_calc_bus_time); 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_check_bandwidth(): 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * old_alloc is from host_controller->bandwidth_allocated in microseconds; 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bustime is from calc_bus_time(), but converted to microseconds. 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns <bustime in us> if successful, 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or -ENOSPC if bandwidth request fails. 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME: 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This initial implementation does not use Endpoint.bInterval 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in managing bandwidth allocation. 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It probably needs to be expanded to use Endpoint.bInterval. 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This can be done as a later enhancement (correction). 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This will also probably require some kind of 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame allocation tracking...meaning, for example, 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that if multiple drivers request interrupts every 10 USB frames, 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they don't all have to be allocated at 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame numbers N, N+10, N+20, etc. Some of them could be at 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+11, N+21, N+31, etc., and others at 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+12, N+22, N+32, etc. 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Similarly for isochronous transfers... 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Individual HCDs can schedule more directly ... this logic 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is not correct for high speed transfers. 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_check_bandwidth (struct usb_device *dev, struct urb *urb) 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int pipe = urb->pipe; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long bustime; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_in = usb_pipein (pipe); 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_iso = usb_pipeisoc (pipe); 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int old_alloc = dev->bus->bandwidth_allocated; 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int new_alloc; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso, 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_maxpacket (dev, pipe, !is_in))); 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_iso) 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime /= urb->number_of_packets; 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_alloc = old_alloc + (int) bustime; 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) { 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *mode = 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ""; 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "would have "; 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "usb_check_bandwidth %sFAILED: %d + %ld = %d usec\n", 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mode, old_alloc, bustime, new_alloc); 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = -ENOSPC; /* report error */ 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return bustime; 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_check_bandwidth); 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_claim_bandwidth - records bandwidth for a periodic transfer 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bustime: bandwidth consumed, in (average) microseconds per frame 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bus bandwidth reservations are recorded purely for diagnostic purposes. 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCDs are expected not to overcommit periodic bandwidth, and to record such 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reservations whenever endpoints are added to the periodic schedule. 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * large its periodic schedule is. 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc) 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated += bustime; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs++; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs++; 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = bustime; 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc increased by %d (%s) to %d for %d requesters\n", 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime, 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_claim_bandwidth); 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_release_bandwidth - reverses effect of usb_claim_bandwidth() 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This records that previously allocated bandwidth has been released. 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bandwidth is released when endpoints are removed from the host controller's 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * periodic schedule. 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_release_bandwidth (struct usb_device *dev, struct urb *urb, int isoc) 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated -= urb->bandwidth; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs--; 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs--; 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc reduced by %d (%s) to %d for %d requesters\n", 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth, 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = 0; 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_release_bandwidth); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void urb_unlink (struct urb *urb) 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Release any periodic transfer bandwidth */ 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->bandwidth) 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_release_bandwidth (urb->dev, urb, 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipeisoc (urb->pipe)); 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear all state linking urb to this dev (and hcd) */ 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init (&urb->urb_list); 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_dev (urb->dev); 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* may be called in any context with a valid urb->dev usecount 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller surrenders "ownership" of urb 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * expects usb_submit_urb() to have sanity checked and conditioned all 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inputs in the urb 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_submit_urb (struct urb *urb, int mem_flags) 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status; 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = urb->dev->bus->hcpriv; 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit(&hcd->self, urb); 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Atomically queue the urb, first to our records, then to the HCD. 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Access to urb->status is controlled by urb->lock ... changes on 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * i/o completion (normal or fault) or unlinking. 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME: verify that quiescing hc works right (RH cleans up) 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (!ep)) 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ENOENT; 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (unlikely (urb->reject)) 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPERM; 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else switch (hcd->state) { 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_dev (urb->dev); 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail (&urb->urb_list, &ep->urb_list); 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = 0; 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ESHUTDOWN; 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&urb->urb_list); 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* increment urb's reference count as part of giving it to the HCD 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (which now controls it). HCD guarantees that it either returns 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * an error or calls giveback(), but not both. 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb = usb_get_urb (urb); 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc (&urb->use_count); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) { 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: requirement on hub callers (usbfs and the hub 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver, for now) that URBs' urb->transfer_buffer be 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * valid and usb_buffer_{sync,unmap}() not be needed, since 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they could clobber root hub response data. 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = rh_urb_enqueue (hcd, urb); 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lower level hcd code should use *_dma exclusively, 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->self.controller->dma_mask) { 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_dma = dma_map_single ( 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (status)) { 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->reject) 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* called in any context */ 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_get_frame_number (struct usb_device *udev) 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = (struct usb_hcd *)udev->bus->hcpriv; 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!HC_IS_RUNNING (hcd->state)) 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ESHUTDOWN; 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd->driver->get_frame_number (hcd); 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunlink1 (struct usb_hcd *hcd, struct urb *urb) 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = usb_rh_urb_dequeue (hcd, urb); 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = hcd->driver->urb_dequeue (hcd, urb); 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (value != 0) 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "dequeue %p --> %d\n", 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, value); 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_unlink_urb (struct urb *urb, int status) 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = NULL; 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *sys = NULL; 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *tmp; 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb) 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb->dev || !urb->dev->bus) 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we contend for urb->status with the hcd core, 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * which changes it while returning the urb. 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Caller guaranteed that the urb pointer hasn't been freed, and 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that it was submitted. But as a rule it can't know whether or 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not it's already been unlinked ... so we respect the reversed 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * lock sequence needed for the usb_hcd_giveback_urb() code paths 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (urb lock, then hcd_data_lock) in case some other CPU is now 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlinking it. 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&urb->lock, flags); 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sys = &urb->dev->dev; 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = urb->dev->bus->hcpriv; 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd == NULL) { 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ENODEV; 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* running ~= hc unlink handshake works (irq, timer, etc) 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * halted ~= no unlink handshake is needed 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended, resuming == should never happen 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT); 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* insist the urb is still queued */ 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(tmp, &ep->urb_list) { 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == &urb->urb_list) 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp != &urb->urb_list) { 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EIDRM; 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Any status except -EINPROGRESS means something already started to 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlink this URB from the hardware. So there's no more work to do. 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) { 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EBUSY; 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* IRQ setup can easily be broken so that USB controllers 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * never get completion IRQs ... maybe even the ones we need to 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * finish unlinking the initial failed usb_set_address() 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or device descriptor fetch. 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd->saw_irq && hcd->self.root_hub != urb->dev) { 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_warn (hcd->self.controller, "Unlink after no-IRQ? " 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Controller is probably using the wrong IRQ." 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "\n"); 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->saw_irq = 1; 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = unlink1 (hcd, urb); 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != -EIDRM && sys && sys->driver) 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (sys, "hcd_unlink_urb %p fail %d\n", urb, retval); 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* disables the endpoint: cancels any pending urbs, then synchronizes with 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the hcd to make sure all endpoint state is gone from hardware. use for 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set_configuration, set_interface, driver removal, physical disconnect. 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example: a qh stored in ep->hcpriv, holding state related to endpoint 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * type, maxpacket size, toggle, halt status, and scheduling. 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshcd_endpoint_disable (struct usb_device *udev, struct usb_host_endpoint *ep) 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = udev->bus->hcpriv; 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT); 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_disable (); 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME move most of this into message.c as part of its 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * endpoint disable logic 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ep is already gone from udev->ep_{in,out}[]; no more submits */ 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrescan: 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tmp; 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* another cpu may be in hcd, spinning on hcd_data_lock 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to giveback() this urb. the races here should be 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * small, but a full fix needs a new "can't submit" 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * urb state. 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME urb->reject should allow that... 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->status; 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = -ESHUTDOWN; 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* kick hcd unless it's already returning this */ 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) { 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->pipe; 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unlink1 (hcd, urb); 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "shutdown urb %p pipe %08x ep%d%s%s\n", 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, tmp, usb_pipeendpoint (tmp), 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (tmp & USB_DIR_IN) ? "in" : "out", 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ({ char *s; \ 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (usb_pipetype (tmp)) { \ 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_CONTROL: s = ""; break; \ 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_BULK: s = "-bulk"; break; \ 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_INTERRUPT: s = "-intr"; break; \ 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: s = "-iso"; break; \ 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; s;})); 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_enable (); 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* synchronize with the hardware, so old configuration state 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clears out immediately (and will be freed). 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds might_sleep (); 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->endpoint_disable) 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->endpoint_disable (hcd, ep); 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_SUSPEND 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_hub_suspend (struct usb_bus *bus) 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->hub_suspend) 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd->driver->hub_suspend (hcd); 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_hub_resume (struct usb_bus *bus) 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->hub_resume) 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd->driver->hub_resume (hcd); 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wakeup request is received. It queues a request for khubd to 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * resume the root hub. 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_resume_root_hub (hcd->self.root_hub); 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_bus_start_enum); 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_operations - adapts usb_bus framework to HCD framework (bus glue) 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_operations usb_hcd_operations = { 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .get_frame_number = hcd_get_frame_number, 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .submit_urb = hcd_submit_urb, 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .unlink_urb = hcd_unlink_urb, 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .buffer_alloc = hcd_buffer_alloc, 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .buffer_free = hcd_buffer_free, 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .disable = hcd_endpoint_disable, 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_SUSPEND 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .hub_suspend = hcd_hub_suspend, 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .hub_resume = hcd_hub_resume, 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_giveback_urb - return URB from HCD to device driver 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller returning the URB 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: urb being returned to the USB device driver. 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @regs: pt_regs, passed down to the URB completion handler 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This hands the URB from HCD to its USB device driver, using its 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion function. The HCD has freed all per-urb resources 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (and is done using urb->hcpriv). It also released all HCD locks; 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device driver won't cause problems if it frees, modifies, 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or resubmits this URB. 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs) 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int at_root_hub; 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at_root_hub = (urb->dev == hcd->self.root_hub); 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lower level hcd code should use *_dma exclusively */ 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->self.controller->dma_mask && !at_root_hub) { 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, urb->setup_dma, 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma, 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_complete (&hcd->self, urb); 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* pass ownership to the completion handler */ 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->complete (urb, regs); 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (urb->reject)) 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_hcd_giveback_urb); 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @r: saved hardware registers 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsirqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs * r) 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start = hcd->state; 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (start == HC_STATE_HALT) 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq (hcd, r) == IRQ_NONE) 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->saw_irq = 1; 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state != start && hcd->state == HC_STATE_HALT) 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hcd_release (struct usb_bus *bus) 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of(bus, struct usb_hcd, self); 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(hcd); 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *dev, char *bus_name) 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = kcalloc(1, sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.op = &usb_hcd_operations; 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.hcpriv = hcd; 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.release = &hcd_release; 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_create_hcd); 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(hcd->self.controller, NULL); 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_put(&hcd->self); 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_put_hcd); 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* till now HC has been in an indeterminate state ... */ 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "can't reset\n"); 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err1; 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf[8], *bufp = buf; 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef __sparc__ 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = __irq_itoa(irqnum); 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(buf, "%d", irqnum); 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "request interrupt %s failed\n", bufp); 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err2; 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "irq %s, %s 0x%08llx\n", bufp, 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto err3; 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err3: 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err2: 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err1: 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_add_hcd); 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_remove_hcd); 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_MON */ 1841