hcd.c revision 95cf82f99cfbd697c15572c444bd4f54f19745b0
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); 535e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 5369439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 5379439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 5389439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 5399439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 5409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 5419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 5424a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 5439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 5449439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 5459439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 552d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 553d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 554d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 556d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 557d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 559d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 560d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 561d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 562d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 563d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 564d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5661b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern if (unlikely(!hcd->rh_registered)) 5671b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 568d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 569d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 572d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 574d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 5759439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 576d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 577d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 578e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->poll_pending = 0; 579e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 580e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 581e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 5829439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 583e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 5849439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 5854a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 5869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 587e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 588d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 589d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 590e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 5919439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 594d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 59501cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 59601cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 59701cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 598d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 599d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 60001cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 602d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 605d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 606d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 607d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 608d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 609d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 610d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 612d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 614d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 616d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int len = 1 + (urb->dev->maxchild / 8); 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 618d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 619e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 620d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 621d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 622e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 623e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 625e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 626e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 627e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 629e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 630e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 631e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 632e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 633e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 634e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 635e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (hcd->poll_pending) 636e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 637e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 638e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 639d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 640d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6455e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 646d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 6475e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 649d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 654455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 655455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 656d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 657e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 659455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 660e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6629439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 663e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 664e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 665e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 666e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 6675e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 668455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 669d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 670d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 671d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 672455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 673d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 674d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 675e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6779439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6784a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6799439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6809439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 6819439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 682e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 6839439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 684e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6875234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 6885234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 6895234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 6905234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 6915234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 6925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 6935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 6945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 6955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 6965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 6975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 6985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 6995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 7045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 7075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 7095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 7115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 7125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 7205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 7215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 7225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 7235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 7245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 7255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 7265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 7275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 7305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 7315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 7325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 7355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 7365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 7375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 7385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 7395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 7415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 7425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 7435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 7445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7498561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic struct class *usb_host_class; 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7538561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman int retval = 0; 7548561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 7558561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman usb_host_class = class_create(THIS_MODULE, "usb_host"); 7568561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(usb_host_class)) 7578561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman retval = PTR_ERR(usb_host_class); 7588561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return retval; 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7638561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_destroy(usb_host_class); 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 800eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8034186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 805eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 807eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 809eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 810eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 81153f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->class_dev = class_device_create(usb_host_class, NULL, MKDEV(0,0), 812eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->controller, "usb_host%d", 813eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez busnum); 814eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez result = PTR_ERR(bus->class_dev); 815eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (IS_ERR(bus->class_dev)) 816eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_create_class_dev; 8178561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_set_devdata(bus->class_dev, bus); 8188561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 8214186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8233099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 825eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 826eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 828eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 829eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_create_class_dev: 830eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez clear_bit(busnum, busmap.busmap); 831eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 832eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 833eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8534186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 8554186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8573099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8618561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_device_unregister(bus->class_dev); 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8658ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8688ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 869b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 870b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 871b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 873b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 876b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8874186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 8924186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9034186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 918d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_enable_root_hub_irq (struct usb_bus *bus) 919d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 920d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct usb_hcd *hcd; 921d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 922d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd = container_of (bus, struct usb_hcd, self); 923d19ac7da72ab950c315d0da0aa03464587d88b53Alan Stern if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT) 924d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->driver->hub_irq_enable (hcd); 925d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 926d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 965498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 967498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_calc_bus_time); 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 985e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 986e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 987e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 988e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 989e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 990e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 991e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 992e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 993e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 994e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 995e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 996e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 997e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 998e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 999e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1000e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1004e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 10079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(urb->reject)) { 10089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10109f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10199a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10219a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1024eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 10299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1032e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 10339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 10349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1035e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 10369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1037e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1038e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1039e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1040e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1041e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1042e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1043e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1044e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1045e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1046e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1047e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1048e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1049e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1050e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1051e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1052e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1053e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 10579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 10589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 10599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 10609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 10619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 10629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 10639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 10649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 10659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1066e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1067e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 10709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1072eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1073e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1074eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 10779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 10789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 10799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) && 10829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern !is_root_hub(urb->dev)) { 10839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 10849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 10859a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 10869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1088e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 10899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1090e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 10919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1092e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1093e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1094e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1095e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1096e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1097e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1098e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1099e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1100e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1101e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1102e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1105e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1107e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1109e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11119a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 11129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 11149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (hcd->self.uses_dma && !is_root_hub(urb->dev)) { 11185e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc) 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_dma = dma_map_single ( 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 1131fea3409112a93581db18da4c4332c8bf8d68af6bAlan Stern usb_urb_dir_in(urb) 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 11389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (hcd->self.uses_dma && !is_root_hub(urb->dev)) { 11409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (usb_endpoint_xfer_control(&urb->ep->desc) 11419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, urb->setup_dma, 11439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern sizeof(struct usb_ctrlrequest), 11449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern DMA_TO_DEVICE); 11459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (urb->transfer_buffer_length != 0 11469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, 11489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_dma, 11499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_buffer_length, 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_urb_dir_in(urb) 11519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern ? DMA_FROM_DEVICE 11529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern : DMA_TO_DEVICE); 11539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 11559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 11579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 11599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 11609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 11619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 11629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 11649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 11669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 11679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 11699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 11709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 11719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 11739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 11749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 11759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 11779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 11789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 11799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 11809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 11819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 11829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1183e9df41c5c5899259541dc928872cad4d07b82076Alan Stern map_urb_for_dma(hcd, urb); 1184e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (is_root_hub(urb->dev)) 1185e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1186e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else 1187e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 11889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 1192b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 11939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 11949a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 11959a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (urb->reject) 11969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 11979a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1209e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1213809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1214e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1220e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1231a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 12349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int retval; 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12361720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1237e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = unlink1(hcd, urb, status); 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1241e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 12429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 12439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 124932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 125032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 125132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 125232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 12534a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 125432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 125532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 125632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 125732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 125832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 125932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 126032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1261eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 12624a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1263eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1264eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 126532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 12664a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 126732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1268b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1269eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 12704a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1271eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1272b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 12734a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 12744a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 127532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 12761f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern unmap_urb_for_dma(hcd, urb); 12774a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 12781f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 12791f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 128032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 12814a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 128232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 128332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 128432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (unlikely (urb->reject)) 128532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 128632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 128732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 128832aca5600526189dd876e6c92b64fd88cf052c8dAlan SternEXPORT_SYMBOL (usb_hcd_giveback_urb); 128932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 129032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 129132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 129295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 129395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 129495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 129695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1297a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 130295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 130395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 13049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 13051720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 130795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrescan: 13099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 13115e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1313eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 13165e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1317809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1319e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1320e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1321e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1322e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1323e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1324e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1325e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1326e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1327e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1328e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1329e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1330e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1331e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1332e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1333e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1334e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1335e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1336e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1337e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1338e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 134695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1347455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1348809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1349455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1350455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1351455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1352455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1353455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1354455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1355455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1356455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1357809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1358455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1359455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1360455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1361455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1362455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1363455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 136695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 136795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 136895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 136995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 137095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 137195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 137295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 137395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 137495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 137595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 137695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 137795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 137895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 137995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 138095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 138195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 138295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 138395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 138495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 138732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 138832aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 138932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 139032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 139132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 139232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 139332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 139432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 139532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 139632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 139732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 139832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 13999293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401686314cfbdac21c9019c0e04487b5d940db62406Alan Sternint hcd_bus_suspend(struct usb_device *rhdev) 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1403686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1404686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1405686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1407686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 1408686314cfbdac21c9019c0e04487b5d940db62406Alan Stern rhdev->auto_pm ? "auto-" : "", "suspend"); 1409686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1410686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1411686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1412686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1413686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1414686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1415686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1416686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 14179293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1418686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1419686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1420686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 14219293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1422686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 14239293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1426686314cfbdac21c9019c0e04487b5d940db62406Alan Sternint hcd_bus_resume(struct usb_device *rhdev) 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1428686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1429686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1430cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1432686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 1433686314cfbdac21c9019c0e04487b5d940db62406Alan Stern rhdev->auto_pm ? "auto-" : "", "resume"); 14340c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 14359293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1436979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1437979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1438686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 14399293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1440686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1441686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1442686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1443686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1444686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1445686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1446686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 14479293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1448686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1449cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1450686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 14519293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1452cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1453cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 14549293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 14559293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14586b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 14596b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 14606b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 14616b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 14626b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 14636b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 14646b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 14651941044aa9632aa8debbb94a3c8a5ed0ebddade8Alan Stern usb_mark_last_busy(udev); 14666b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_external_resume_device(udev); 14676b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 14686b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 14696b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 14766b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 14776b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 14856b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern queue_work(ksuspend_usb_wq, &hcd->wakeup_work); 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14889293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_bus_start_enum); 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @r: saved hardware registers 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15427d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start = hcd->state; 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15478de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(start == HC_STATE_HALT || 15488de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15507d12e780e003f93433d49ce78cfedf4b4c52adc5David Howells if (hcd->driver->irq (hcd) == IRQ_NONE) 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15538de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 15548de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 15558de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(hcd->state == HC_STATE_HALT)) 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1578d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *dev, char *bus_name) 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16097b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 16151720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1620dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1623d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1624d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 16256b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 16266b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 16276b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_create_hcd); 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16361720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 16371720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 16381720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 16391720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16401720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 16411720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 16421720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16431720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 16441720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 16451720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 16461720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 16471720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 16481720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 16491720058343fa43a1a25bfad9e62ea06e7e9743b6Alan SternEXPORT_SYMBOL (usb_get_hcd); 16501720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16531720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 16541720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_put_hcd); 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16718ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 16728ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16765234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 16778de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 16788de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1679b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 1680b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 1681b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 1682b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 16898ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 1692b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 1693b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 1694b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 1695b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1696b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : 1697b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell USB_SPEED_FULL; 1698b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 1699b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1700db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 1701db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 1702db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 1703db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 1704db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 1705db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 1706b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 1707b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 1708b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 1709b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 1710b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 1711b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 1712b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1713b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1714fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 1715fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 1716fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 1717b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 1718b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1719b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 1726c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 17278ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 1730c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 17458ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1748b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 174955c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 1750b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 17518ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 17528ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 17535234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 17545234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 17555234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 17565234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 17575234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 17585234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 1759d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 1760d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17635234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 17645234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 17655234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_disconnect(&hcd->self.root_hub); 17665234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 1767b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 17688ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 1769b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 1772b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 1773b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 1774b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 1775b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 1776b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 1778b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_add_hcd); 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 18039ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 18046b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 1805d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 18066b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 18076b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 18085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); 18094186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 18114186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18161b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern hcd->poll_rh = 0; 18171b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 18181b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_remove_hcd); 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 182664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 182764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 182864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 182964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 183064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 183164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 183264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 183364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 183464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey GorelovEXPORT_SYMBOL (usb_hcd_platform_shutdown); 183564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18384749f32da939d4e4160541b2cadc22492bb507ecAdrian Bunk#if defined(CONFIG_USB_MON) 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_MON */ 1875