hcd.c revision b0d9efba3ec53468984aecef8eeaf079089f2e5a
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/module.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/scatterlist.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 364186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 3964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov#include <linux/platform_device.h> 406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#include <linux/workqueue.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 964186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 102809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 103809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 108809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 109809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 110809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 111809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 112809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 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 ]*/ 13316f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 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 ] */ 15616f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 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 */ 26388fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 26488fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 26588fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ascii2utf (char *s, u8 *utf, int utfmax) 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @type: string describing our driver 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_string ( 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int id, 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd, 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *data, 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds) { 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = min (len, 4); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 32796b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 32896b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // unsupported IDs --> "protocol stall" 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPIPE; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 35454bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 35554bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 0; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int patch_wakeup = 0; 359e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3629439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 3639439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 364e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 365e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 366e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 367e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 368e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 369b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 370e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 385fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 386fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 387fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 388fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 389fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 390fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 391fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 392fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 393fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 394fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 395fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 396fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 397fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 398fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 399fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 400fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 402fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 403fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 410fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 415fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 416fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 417fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) { 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 446fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rh_string (wValue & 0xff, hcd, ubuf, wLength); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n < 0) 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = n; 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 490b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 491b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 492b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 493b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 494b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 495b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 496b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 497b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 499b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 500b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 501b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 515b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 5349439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status == -EINPROGRESS) 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 537e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 5389439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 5399439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 5409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 5419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 5429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 5439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 5449439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern usb_hcd_giveback_urb(hcd, urb); 5459439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 5469439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 5479439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 554d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 555d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 556d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 558d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 559d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 561d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 562d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 563d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 564d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 565d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 566d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern if (unlikely(!hcd->rh_registered)) 5691b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 570d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 571d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 573d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 574d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 576d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 5779439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 578d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 579d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 580e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->poll_pending = 0; 581e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 582e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->status = 0; 583e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 584e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 5859439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 586e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 5879439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 5889439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern usb_hcd_giveback_urb(hcd, urb); 5899439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 590e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 591d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 592d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 593e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 5949439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 597d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 59801cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 59901cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 60001cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 601d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 602d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 60301cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 605d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 608d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 609d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 610d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 611d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 612d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 613d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 615d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 617d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 619d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int len = 1 + (urb->dev->maxchild / 8); 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 622e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 623d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 624d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 625e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 626e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 628e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 629e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 630e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 632e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 633e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 634e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 635e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 636e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 637e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 638e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (hcd->poll_pending) 639e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 640e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 641e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 642d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 643d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6485e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 649d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 6505e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 652d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 657455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 658455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 659d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 660e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 662455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 663e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6659439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 666e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 667e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 668e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 669e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 6705e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 671455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 672d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 673d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 674d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 675455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 676d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 677d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 678e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6809439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6819439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern usb_hcd_giveback_urb(hcd, urb); 6829439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6839439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 6849439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 685e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 6869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 687e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6905234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 6915234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 6925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 6935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 6945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 6955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 6965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 6975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 6985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 6995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 7075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 7105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 7125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 7145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 7155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 7235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 7245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 7255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 7265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 7275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 7285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 7295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 7305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 7335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 7345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 7355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 7385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 7395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 7405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 7415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 7425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 7445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 7455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 7465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 7475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7528561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic struct class *usb_host_class; 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7568561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman int retval = 0; 7578561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 7588561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman usb_host_class = class_create(THIS_MODULE, "usb_host"); 7598561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(usb_host_class)) 7608561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman retval = PTR_ERR(usb_host_class); 7618561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return retval; 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7668561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_destroy(usb_host_class); 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 803eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8064186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 808eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 810eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 812eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 813eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 81453f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->class_dev = class_device_create(usb_host_class, NULL, MKDEV(0,0), 815eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->controller, "usb_host%d", 816eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez busnum); 817eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez result = PTR_ERR(bus->class_dev); 818eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (IS_ERR(bus->class_dev)) 819eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_create_class_dev; 8208561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_set_devdata(bus->class_dev, bus); 8218561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 8244186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8263099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 828eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 829eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 831eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 832eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_create_class_dev: 833eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez clear_bit(busnum, busmap.busmap); 834eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 835eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 836eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8564186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 8584186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8603099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8648561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_device_unregister(bus->class_dev); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8688ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8718ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 872b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 873b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 874b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 876b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 879b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8904186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 8954186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9064186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_enable_root_hub_irq (struct usb_bus *bus) 922d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 923d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct usb_hcd *hcd; 924d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 925d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd = container_of (bus, struct usb_hcd, self); 926d19ac7da72ab950c315d0da0aa03464587d88b53Alan Stern if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT) 927d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->driver->hub_irq_enable (hcd); 928d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 929d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 968498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 970498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_calc_bus_time); 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 988e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 989e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 990e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 991e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 992e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 993e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 994e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 995e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 996e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 997e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 998e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 999e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1000e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1001e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1002e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1003e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1007e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 10109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(urb->reject)) { 10119a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10139f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10219a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10249a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 10279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 10319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1034e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 10359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 10369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1037e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 10389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1039e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1040e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1041e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1042e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1043e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1044e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1045e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1046e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1047e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1048e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1049e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1050e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1051e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1052e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1053e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1057e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1058e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 10599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 10609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 10619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 10629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 10639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 10649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 10659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 10669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 10679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1068e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1069e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 10729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1074e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (urb->status != -EINPROGRESS) 1075e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 10769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->status = status; 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 10799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 10829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 10839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) && 10849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern !is_root_hub(urb->dev)) { 10859a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 10869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 10879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 10889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1090e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 10919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1092e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 10939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1094e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1095e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1096e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1097e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1098e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1099e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1100e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1101e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1102e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1103e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1104e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1107e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1109e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1111e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 11149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 11169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11199a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (hcd->self.uses_dma && !is_root_hub(urb->dev)) { 11205e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc) 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_dma = dma_map_single ( 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 1133fea3409112a93581db18da4c4332c8bf8d68af6bAlan Stern usb_urb_dir_in(urb) 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 11409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (hcd->self.uses_dma && !is_root_hub(urb->dev)) { 11429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (usb_endpoint_xfer_control(&urb->ep->desc) 11439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, urb->setup_dma, 11459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern sizeof(struct usb_ctrlrequest), 11469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern DMA_TO_DEVICE); 11479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (urb->transfer_buffer_length != 0 11489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_dma, 11519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_buffer_length, 11529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_urb_dir_in(urb) 11539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern ? DMA_FROM_DEVICE 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern : DMA_TO_DEVICE); 11559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 11579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 11599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 11619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 11629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 11639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 11649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 11669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 11689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 11699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 11719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 11729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 11739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 11759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 11769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 11779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 11799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 11809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 11819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 11829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 11839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 11849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1185e9df41c5c5899259541dc928872cad4d07b82076Alan Stern map_urb_for_dma(hcd, urb); 1186e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (is_root_hub(urb->dev)) 1187e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1188e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else 1189e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 11909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 1194b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 11959a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 11969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 11979a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (urb->reject) 11989a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 11999a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1211e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1215809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1216e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1222e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1233a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 12369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int retval; 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12381720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1239e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = unlink1(hcd, urb, status); 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1243e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 12449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 12459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 125132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 125232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 125332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 125432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 125532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 125632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 125732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 125832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 125932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 126032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 126132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 126232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 126332aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternvoid usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb) 126432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 12659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 126632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usbmon_urb_complete (&hcd->self, urb); 126732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_unanchor_urb(urb); 1268b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1269b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1270b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 1271b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern !urb->status)) 1272b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->status = -EREMOTEIO; 127332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 127432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 127532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 127632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 127732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (unlikely (urb->reject)) 127832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 127932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 128032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 128132aca5600526189dd876e6c92b64fd88cf052c8dAlan SternEXPORT_SYMBOL (usb_hcd_giveback_urb); 128232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 128332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 128432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* disables the endpoint: cancels any pending urbs, then synchronizes with 1286455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * the hcd to make sure all endpoint state is gone from hardware, and then 1287455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * waits until the endpoint's queue is completely drained. use for 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set_configuration, set_interface, driver removal, physical disconnect. 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example: a qh stored in ep->hcpriv, holding state related to endpoint 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * type, maxpacket size, toggle, halt status, and scheduling. 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1293a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternvoid usb_hcd_endpoint_disable (struct usb_device *udev, 1294a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12999a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 13001720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ep is already gone from udev->ep_{in,out}[]; no more submits */ 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrescan: 13049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 13065e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1308455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* the urb may already have been unlinked */ 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 13125e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1313809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1315e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1316e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1317e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1318e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1319e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1320e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1321e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1322e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1323e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1324e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1325e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1326e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1327e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1328e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1329e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1330e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1331e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1332e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1333e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1334e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* synchronize with the hardware, so old configuration state 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clears out immediately (and will be freed). 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->endpoint_disable) 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->endpoint_disable (hcd, ep); 1347455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1348455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* Wait until the endpoint queue is completely empty. Most HCDs 1349455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * will have done this already in their endpoint_disable method, 1350455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * but some might not. And there could be root-hub control URBs 1351455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * still pending since they aren't affected by the HCDs' 1352455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * endpoint_disable methods. 1353455b25fb209c8241e2163b491228b28667d82c1cAlan Stern */ 1354455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1355809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1356455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1357455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1358455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1359455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1360455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1361455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1362455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1363455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1364809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1365455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1366455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1367455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1368455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1369455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1370455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 137532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 137632aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 137732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 137832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 137932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 138032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 138132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 138232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 138332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 138432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 138532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 138632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 13879293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1389686314cfbdac21c9019c0e04487b5d940db62406Alan Sternint hcd_bus_suspend(struct usb_device *rhdev) 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1391686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1392686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1393686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1395686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 1396686314cfbdac21c9019c0e04487b5d940db62406Alan Stern rhdev->auto_pm ? "auto-" : "", "suspend"); 1397686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1398686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1399686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1400686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1401686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1402686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1403686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1404686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 14059293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1406686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1407686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1408686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 14099293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1410686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 14119293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1414686314cfbdac21c9019c0e04487b5d940db62406Alan Sternint hcd_bus_resume(struct usb_device *rhdev) 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1416686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1417686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1418cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1420686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 1421686314cfbdac21c9019c0e04487b5d940db62406Alan Stern rhdev->auto_pm ? "auto-" : "", "resume"); 14220c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 14239293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1424979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1425979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1426686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 14279293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1428686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1429686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1430686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1431686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1432686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1433686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1434686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 14359293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1436686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1437cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1438686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 14399293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1440cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1441cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 14429293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 14439293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14466b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 14476b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 14486b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 14496b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 14506b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 14516b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 14526b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 14531941044aa9632aa8debbb94a3c8a5ed0ebddade8Alan Stern usb_mark_last_busy(udev); 14546b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_external_resume_device(udev); 14556b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 14566b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 14576b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 14646b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 14656b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 14736b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern queue_work(ksuspend_usb_wq, &hcd->wakeup_work); 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14769293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_bus_start_enum); 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @r: saved hardware registers 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15307d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start = hcd->state; 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15358de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(start == HC_STATE_HALT || 15368de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15387d12e780e003f93433d49ce78cfedf4b4c52adc5David Howells if (hcd->driver->irq (hcd) == IRQ_NONE) 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15418de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 15428de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 15438de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(hcd->state == HC_STATE_HALT)) 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1566d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *dev, char *bus_name) 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15977b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 16031720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1608dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1611d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1612d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 16136b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 16146b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 16156b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_create_hcd); 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16241720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 16251720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 16261720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 16271720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16281720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 16291720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 16301720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16311720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 16321720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 16331720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 16341720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 16351720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 16361720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 16371720058343fa43a1a25bfad9e62ea06e7e9743b6Alan SternEXPORT_SYMBOL (usb_get_hcd); 16381720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16411720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 16421720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_put_hcd); 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16598ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 16608ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16645234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 16658de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 16668de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1667b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 1668b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 1669b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 1670b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 16778ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1679b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 1680b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 1681b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 1682b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 1683b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1684b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : 1685b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell USB_SPEED_FULL; 1686b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 1687b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1688db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 1689db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 1690db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 1691db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 1692db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 1693db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 1694b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 1695b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 1696b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 1697b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 1698b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 1699b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 1700b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1701b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1702fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 1703fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 1704fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 1705b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 1706b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1707b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 1714c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 17158ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 1718c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 17338ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1736b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 173755c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 1738b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 17398ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 17408ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 17415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 17425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 17435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 17445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 17455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 17465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 1747d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 1748d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17515234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 17525234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 17535234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_disconnect(&hcd->self.root_hub); 17545234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 1755b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 17568ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 1757b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 1760b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 1761b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 1762b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 1763b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 1764b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 1766b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_add_hcd); 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 17919ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 17926b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 1793d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 17946b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 17956b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 17965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); 17974186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 17994186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18041b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern hcd->poll_rh = 0; 18051b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 18061b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_remove_hcd); 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 181464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 181564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 181664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 181764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 181864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 181964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 182064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 182164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 182264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey GorelovEXPORT_SYMBOL (usb_hcd_platform_shutdown); 182364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18264749f32da939d4e4160541b2cadc22492bb507ecAdrian Bunk#if defined(CONFIG_USB_MON) 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_MON */ 1863