hcd.c revision 96b644bdec977b97a45133e5b4466ba47a7a5e65
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> 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// #define USB_BANDWIDTH_MESSAGES 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 974186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating hcd data */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_data_lock); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDeviceProtocol; [ usb 2.0 single TT ]*/ 12916f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idVendor; */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idProduct; */ 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 15216f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idVendor; */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idProduct; */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ascii2utf (char *s, u8 *utf, int utfmax) 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @type: string describing our driver 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_string ( 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int id, 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd, 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *data, 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds) { 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = min (len, 4); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 32196b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 32296b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // unsupported IDs --> "protocol stall" 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPIPE; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 34854bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 34954bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 0; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int patch_wakeup = 0; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = 0; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 371fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 372fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 373fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 374fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 375fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 376fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 377fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 378fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 379fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 380fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 381fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 382fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 383fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 384fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 385fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 386fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 388fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 389fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 396fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 401fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 402fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 403fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) { 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 432fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rh_string (wValue & 0xff, hcd, ubuf, wLength); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n < 0) 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = n; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 476b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 477b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 478b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 479b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 480b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 481b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 482b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 483b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 485b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 486b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 487b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 501b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_save (flags); 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status == -EINPROGRESS) 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hcd_giveback_urb (hcd, urb, NULL); 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 533d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 534d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 535d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 537d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 538d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 540d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 541d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 542d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 543d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 544d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 545d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 547d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 548d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 550d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 551d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 553d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 554d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_save (flags); 555d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock(&hcd_root_hub_lock); 556d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 557d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 558d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock(&urb->lock); 559d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb->status == -EINPROGRESS) { 560d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 0; 561d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 562d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->status = 0; 563d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = NULL; 564d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->actual_length = length; 565d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern memcpy(urb->transfer_buffer, buffer, length); 566d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else /* urb has been unlinked */ 567d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 568d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock(&urb->lock); 569d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else 570d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 571d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock(&hcd_root_hub_lock); 572d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 573d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* local irqs are always blocked in completions */ 574d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) 575d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_giveback_urb (hcd, urb, NULL); 576d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else 577d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 578d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_restore (flags); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 582d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * exceed that limit if HZ is 100. */ 583d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 584d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 585d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies + msecs_to_jiffies(250)); 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 587d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 590d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 591d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 592d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 593d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 594d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 595d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 597d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 599d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 601d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int len = 1 + (urb->dev->maxchild / 8); 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 603d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 604d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb->status != -EINPROGRESS) /* already unlinked */ 605d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = urb->status; 606d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else if (hcd->status_urb || urb->transfer_buffer_length < len) { 607d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 608d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 609d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { 610d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = urb; 611d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = hcd; /* indicate it's queued */ 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 613d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 614d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies + 615d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern msecs_to_jiffies(250)); 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 617d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* If a status change has already occurred, report it ASAP */ 618d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else if (hcd->poll_pending) 619d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies); 620d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = 0; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 622d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 623d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 628d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (usb_pipeint (urb->pipe)) 629d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe)) 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 632d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 637455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 638455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 639d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 642455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 644455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (usb_pipeendpoint(urb->pipe) == 0) { /* Control URB */ 645455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 646d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 647d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 648d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 649455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 650455b25fb209c8241e2163b491228b28667d82c1cAlan Stern local_irq_save (flags); 651d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock (&hcd_root_hub_lock); 652d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 653d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 654d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = NULL; 655d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else 656d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = NULL; /* wasn't fully queued */ 657d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock (&hcd_root_hub_lock); 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) 659d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_giveback_urb (hcd, urb, NULL); 660455b25fb209c8241e2163b491228b28667d82c1cAlan Stern local_irq_restore (flags); 661d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6688561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic struct class *usb_host_class; 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6728561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman int retval = 0; 6738561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 6748561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman usb_host_class = class_create(THIS_MODULE, "usb_host"); 6758561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(usb_host_class)) 6768561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman retval = PTR_ERR(usb_host_class); 6778561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return retval; 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6828561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_destroy(usb_host_class); 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7214186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (busnum < USB_MAXBUS) { 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (busnum, busmap.busmap); 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = busnum; 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 7284186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -E2BIG; 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73253f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->class_dev = class_device_create(usb_host_class, NULL, MKDEV(0,0), 73353f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->controller, "usb_host%d", busnum); 7348561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(bus->class_dev)) { 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(busnum, busmap.busmap); 7364186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7378561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return PTR_ERR(bus->class_dev); 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7408561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_set_devdata(bus->class_dev, bus); 7418561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 7444186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7463099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum); 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7694186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 7714186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7733099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7778561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_device_unregister(bus->class_dev); 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7818ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7848ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 785b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 786b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 787b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 789b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 792b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8034186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 8084186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8194186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 834d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_enable_root_hub_irq (struct usb_bus *bus) 835d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 836d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct usb_hcd *hcd; 837d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 838d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd = container_of (bus, struct usb_hcd, self); 839d19ac7da72ab950c315d0da0aa03464587d88b53Alan Stern if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT) 840d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->driver->hub_irq_enable (hcd); 841d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 842d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 881498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 883498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_calc_bus_time); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_check_bandwidth(): 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * old_alloc is from host_controller->bandwidth_allocated in microseconds; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bustime is from calc_bus_time(), but converted to microseconds. 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns <bustime in us> if successful, 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or -ENOSPC if bandwidth request fails. 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME: 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This initial implementation does not use Endpoint.bInterval 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in managing bandwidth allocation. 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It probably needs to be expanded to use Endpoint.bInterval. 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This can be done as a later enhancement (correction). 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This will also probably require some kind of 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame allocation tracking...meaning, for example, 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that if multiple drivers request interrupts every 10 USB frames, 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they don't all have to be allocated at 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame numbers N, N+10, N+20, etc. Some of them could be at 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+11, N+21, N+31, etc., and others at 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+12, N+22, N+32, etc. 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Similarly for isochronous transfers... 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Individual HCDs can schedule more directly ... this logic 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is not correct for high speed transfers. 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_check_bandwidth (struct usb_device *dev, struct urb *urb) 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int pipe = urb->pipe; 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long bustime; 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_in = usb_pipein (pipe); 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_iso = usb_pipeisoc (pipe); 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int old_alloc = dev->bus->bandwidth_allocated; 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int new_alloc; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso, 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_maxpacket (dev, pipe, !is_in))); 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_iso) 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime /= urb->number_of_packets; 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_alloc = old_alloc + (int) bustime; 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) { 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *mode = 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ""; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "would have "; 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "usb_check_bandwidth %sFAILED: %d + %ld = %d usec\n", 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mode, old_alloc, bustime, new_alloc); 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = -ENOSPC; /* report error */ 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return bustime; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_check_bandwidth); 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_claim_bandwidth - records bandwidth for a periodic transfer 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bustime: bandwidth consumed, in (average) microseconds per frame 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bus bandwidth reservations are recorded purely for diagnostic purposes. 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCDs are expected not to overcommit periodic bandwidth, and to record such 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reservations whenever endpoints are added to the periodic schedule. 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * large its periodic schedule is. 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc) 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated += bustime; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs++; 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs++; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = bustime; 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc increased by %d (%s) to %d for %d requesters\n", 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime, 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_claim_bandwidth); 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_release_bandwidth - reverses effect of usb_claim_bandwidth() 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This records that previously allocated bandwidth has been released. 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bandwidth is released when endpoints are removed from the host controller's 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * periodic schedule. 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_release_bandwidth (struct usb_device *dev, struct urb *urb, int isoc) 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated -= urb->bandwidth; 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs--; 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs--; 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc reduced by %d (%s) to %d for %d requesters\n", 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth, 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = 0; 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_release_bandwidth); 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void urb_unlink (struct urb *urb) 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Release any periodic transfer bandwidth */ 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->bandwidth) 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_release_bandwidth (urb->dev, urb, 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipeisoc (urb->pipe)); 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear all state linking urb to this dev (and hcd) */ 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init (&urb->urb_list); 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* may be called in any context with a valid urb->dev usecount 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller surrenders "ownership" of urb 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * expects usb_submit_urb() to have sanity checked and conditioned all 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inputs in the urb 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1053a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status; 10561720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit(&hcd->self, urb); 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Atomically queue the urb, first to our records, then to the HCD. 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Access to urb->status is controlled by urb->lock ... changes on 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * i/o completion (normal or fault) or unlinking. 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME: verify that quiescing hc works right (RH cleans up) 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (!ep)) 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ENOENT; 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (unlikely (urb->reject)) 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPERM; 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else switch (hcd->state) { 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1083979d5199fee9e80290ddeb532e5993bd15506712David Brownelldoit: 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail (&urb->urb_list, &ep->urb_list); 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = 0; 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1087979d5199fee9e80290ddeb532e5993bd15506712David Brownell case HC_STATE_SUSPENDED: 1088979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* HC upstream links (register access, wakeup signaling) can work 1089979d5199fee9e80290ddeb532e5993bd15506712David Brownell * even when the downstream links (and DMA etc) are quiesced; let 1090979d5199fee9e80290ddeb532e5993bd15506712David Brownell * usbcore talk to the root hub. 1091979d5199fee9e80290ddeb532e5993bd15506712David Brownell */ 1092979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->self.controller->power.power_state.event == PM_EVENT_ON 1093979d5199fee9e80290ddeb532e5993bd15506712David Brownell && urb->dev->parent == NULL) 1094979d5199fee9e80290ddeb532e5993bd15506712David Brownell goto doit; 1095979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* FALL THROUGH */ 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ESHUTDOWN; 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&urb->urb_list); 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* increment urb's reference count as part of giving it to the HCD 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (which now controls it). HCD guarantees that it either returns 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * an error or calls giveback(), but not both. 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb = usb_get_urb (urb); 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc (&urb->use_count); 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) { 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: requirement on hub callers (usbfs and the hub 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver, for now) that URBs' urb->transfer_buffer be 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * valid and usb_buffer_{sync,unmap}() not be needed, since 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they could clobber root hub response data. 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = rh_urb_enqueue (hcd, urb); 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lower level hcd code should use *_dma exclusively, 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1127dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern if (hcd->self.uses_dma) { 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_dma = dma_map_single ( 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (status)) { 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->reject) 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* called in any context */ 1162a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11641720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 11651720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!HC_IS_RUNNING (hcd->state)) 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ESHUTDOWN; 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd->driver->get_frame_number (hcd); 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunlink1 (struct usb_hcd *hcd, struct urb *urb) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = usb_rh_urb_dequeue (hcd, urb); 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = hcd->driver->urb_dequeue (hcd, urb); 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (value != 0) 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "dequeue %p --> %d\n", 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, value); 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1205a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = NULL; 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *sys = NULL; 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *tmp; 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb) 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb->dev || !urb->dev->bus) 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we contend for urb->status with the hcd core, 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * which changes it while returning the urb. 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Caller guaranteed that the urb pointer hasn't been freed, and 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that it was submitted. But as a rule it can't know whether or 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not it's already been unlinked ... so we respect the reversed 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * lock sequence needed for the usb_hcd_giveback_urb() code paths 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (urb lock, then hcd_data_lock) in case some other CPU is now 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlinking it. 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&urb->lock, flags); 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sys = &urb->dev->dev; 12381720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(urb->dev->bus); 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd == NULL) { 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ENODEV; 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* insist the urb is still queued */ 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(tmp, &ep->urb_list) { 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == &urb->urb_list) 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp != &urb->urb_list) { 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EIDRM; 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Any status except -EINPROGRESS means something already started to 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlink this URB from the hardware. So there's no more work to do. 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) { 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EBUSY; 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* IRQ setup can easily be broken so that USB controllers 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * never get completion IRQs ... maybe even the ones we need to 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * finish unlinking the initial failed usb_set_address() 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or device descriptor fetch. 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12678de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) 12688de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt && hcd->self.root_hub != urb->dev) { 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_warn (hcd->self.controller, "Unlink after no-IRQ? " 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Controller is probably using the wrong IRQ." 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "\n"); 12728de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = unlink1 (hcd, urb); 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != -EIDRM && sys && sys->driver) 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (sys, "hcd_unlink_urb %p fail %d\n", urb, retval); 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* disables the endpoint: cancels any pending urbs, then synchronizes with 1296455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * the hcd to make sure all endpoint state is gone from hardware, and then 1297455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * waits until the endpoint's queue is completely drained. use for 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set_configuration, set_interface, driver removal, physical disconnect. 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example: a qh stored in ep->hcpriv, holding state related to endpoint 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * type, maxpacket size, toggle, halt status, and scheduling. 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1303a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternvoid usb_hcd_endpoint_disable (struct usb_device *udev, 1304a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13091720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT && 1312d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern udev->state != USB_STATE_NOTATTACHED); 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_disable (); 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ep is already gone from udev->ep_{in,out}[]; no more submits */ 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrescan: 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tmp; 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1322455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* the urb may already have been unlinked */ 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->status; 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = -ESHUTDOWN; 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* kick hcd unless it's already returning this */ 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) { 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->pipe; 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unlink1 (hcd, urb); 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "shutdown urb %p pipe %08x ep%d%s%s\n", 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, tmp, usb_pipeendpoint (tmp), 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (tmp & USB_DIR_IN) ? "in" : "out", 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ({ char *s; \ 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (usb_pipetype (tmp)) { \ 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_CONTROL: s = ""; break; \ 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_BULK: s = "-bulk"; break; \ 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_INTERRUPT: s = "-intr"; break; \ 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: s = "-iso"; break; \ 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; s;})); 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_enable (); 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* synchronize with the hardware, so old configuration state 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clears out immediately (and will be freed). 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds might_sleep (); 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->endpoint_disable) 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->endpoint_disable (hcd, ep); 1364455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1365455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* Wait until the endpoint queue is completely empty. Most HCDs 1366455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * will have done this already in their endpoint_disable method, 1367455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * but some might not. And there could be root-hub control URBs 1368455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * still pending since they aren't affected by the HCDs' 1369455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * endpoint_disable methods. 1370455b25fb209c8241e2163b491228b28667d82c1cAlan Stern */ 1371455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1372455b25fb209c8241e2163b491228b28667d82c1cAlan Stern spin_lock_irq (&hcd_data_lock); 1373455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1374455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1375455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1376455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1377455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1378455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1379455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1380455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1381455b25fb209c8241e2163b491228b28667d82c1cAlan Stern spin_unlock_irq (&hcd_data_lock); 1382455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1383455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1384455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1385455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1386455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1387455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13929293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13940c0382e32d46f606951010b202382be14d180a17Alan Sternint hcd_bus_suspend (struct usb_bus *bus) 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 13979293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell int status; 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14000c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_suspend) 14019293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 14029293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_QUIESCING; 14030c0382e32d46f606951010b202382be14d180a17Alan Stern status = hcd->driver->bus_suspend (hcd); 14049293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell if (status == 0) 14059293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 14069293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell else 14079293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", 14089293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 14099293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14120c0382e32d46f606951010b202382be14d180a17Alan Sternint hcd_bus_resume (struct usb_bus *bus) 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14159293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell int status; 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14180c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 14199293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1420979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1421979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 14229293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 14230c0382e32d46f606951010b202382be14d180a17Alan Stern status = hcd->driver->bus_resume (hcd); 14249293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell if (status == 0) 14259293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 14269293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell else { 14279293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", 14289293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 14299293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell usb_hc_died(hcd); 14309293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 14319293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wakeup request is received. It queues a request for khubd to 1441979d5199fee9e80290ddeb532e5993bd15506712David Brownell * resume the root hub (that is, manage its downstream ports again). 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_resume_root_hub (hcd->self.root_hub); 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14529293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 14641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_bus_start_enum); 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_giveback_urb - return URB from HCD to device driver 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller returning the URB 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: urb being returned to the USB device driver. 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @regs: pt_regs, passed down to the URB completion handler 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This hands the URB from HCD to its USB device driver, using its 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion function. The HCD has freed all per-urb resources 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (and is done using urb->hcpriv). It also released all HCD locks; 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device driver won't cause problems if it frees, modifies, 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or resubmits this URB. 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs) 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int at_root_hub; 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at_root_hub = (urb->dev == hcd->self.root_hub); 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1517dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern /* lower level hcd code should use *_dma exclusively if the 1518dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern * host controller does DMA */ 1519dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern if (hcd->self.uses_dma && !at_root_hub) { 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, urb->setup_dma, 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma, 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_complete (&hcd->self, urb); 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* pass ownership to the completion handler */ 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->complete (urb, regs); 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (urb->reject)) 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_hcd_giveback_urb); 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @r: saved hardware registers 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsirqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs * r) 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start = hcd->state; 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15618de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(start == HC_STATE_HALT || 15628de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq (hcd, r) == IRQ_NONE) 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15678de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 15688de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 15698de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(hcd->state == HC_STATE_HALT)) 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1592d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *dev, char *bus_name) 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16237b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 16291720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1634dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1637d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1638d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_create_hcd); 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16481720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 16491720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 16501720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 16511720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16521720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 16531720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 16541720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16551720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 16561720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 16571720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 16581720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 16591720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 16601720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 16611720058343fa43a1a25bfad9e62ea06e7e9743b6Alan SternEXPORT_SYMBOL (usb_get_hcd); 16621720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16651720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 16661720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_put_hcd); 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16838ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 16848ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16888de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 16898de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1690b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 1691b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 1692b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 1693b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 17008ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1702b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 1703b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 1704b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 1705b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 1706b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1707b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : 1708b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell USB_SPEED_FULL; 1709b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 1710b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1711db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 1712db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 1713db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 1714db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 1715db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 1716db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 1717b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 1718b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 1719b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 1720b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 1721b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 1722b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 1723b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1724b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1725fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 1726fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 1727fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 1728b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 1729b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1730b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 1737c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 17388ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 1741c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 17568ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1759b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 176055c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 1761b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 17628ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 17638ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 1764d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 1765d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1768b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 17698ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 1770b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 1773b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 1774b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 1775b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 1776b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 1777b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 1779b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_add_hcd); 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 18049ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 18054186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 18074186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1809d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 1810d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern del_timer_sync(&hcd->rh_timer); 1811d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_remove_hcd); 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 182264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 182364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 182464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 182564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 182664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 182764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 182864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 182964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 183064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey GorelovEXPORT_SYMBOL (usb_hcd_platform_shutdown); 183164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18344749f32da939d4e4160541b2cadc22492bb507ecAdrian Bunk#if defined(CONFIG_USB_MON) 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_MON */ 1871