hcd.c revision dd990f16a39d4e615c0b70a0ab50b79b32bfb16d
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) { 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf (buf, sizeof buf, "%s %s %s", system_utsname.sysname, 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds system_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; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 tbuf [sizeof (struct usb_hub_descriptor)]; 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 0; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int patch_wakeup = 0; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = 0; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 370fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 371fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 372fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 373fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 374fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 375fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 376fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 377fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 378fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 379fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 380fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 381fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 382fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 383fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 384fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 385fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 387fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 388fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 395fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 400fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 401fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 402fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) { 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 431fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rh_string (wValue & 0xff, hcd, ubuf, wLength); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n < 0) 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = n; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 475b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 476b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 477b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 478b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 479b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 480b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 481b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 482b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 484b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 485b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 486b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 500b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_save (flags); 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status == -EINPROGRESS) 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hcd_giveback_urb (hcd, urb, NULL); 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 532d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 533d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 534d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 536d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 537d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 539d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 540d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 541d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 542d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 543d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 544d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 546d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 547d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 549d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 550d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 552d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 553d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_save (flags); 554d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock(&hcd_root_hub_lock); 555d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 556d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 557d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock(&urb->lock); 558d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb->status == -EINPROGRESS) { 559d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 0; 560d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 561d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->status = 0; 562d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = NULL; 563d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->actual_length = length; 564d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern memcpy(urb->transfer_buffer, buffer, length); 565d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else /* urb has been unlinked */ 566d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 567d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock(&urb->lock); 568d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else 569d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 570d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock(&hcd_root_hub_lock); 571d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 572d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* local irqs are always blocked in completions */ 573d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) 574d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_giveback_urb (hcd, urb, NULL); 575d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else 576d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 577d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_restore (flags); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 580d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 581d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * exceed that limit if HZ is 100. */ 582d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 583d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 584d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies + msecs_to_jiffies(250)); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 586d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 589d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 590d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 591d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 592d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 593d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 594d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 596d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 598d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 600d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int len = 1 + (urb->dev->maxchild / 8); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 602d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 603d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb->status != -EINPROGRESS) /* already unlinked */ 604d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = urb->status; 605d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else if (hcd->status_urb || urb->transfer_buffer_length < len) { 606d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 607d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 608d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { 609d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = urb; 610d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = hcd; /* indicate it's queued */ 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 612d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 613d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies + 614d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern msecs_to_jiffies(250)); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 616d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* If a status change has already occurred, report it ASAP */ 617d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else if (hcd->poll_pending) 618d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies); 619d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = 0; 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 621d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 622d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 627d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (usb_pipeint (urb->pipe)) 628d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe)) 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 631d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 636455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 637455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 638d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 641455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 643455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (usb_pipeendpoint(urb->pipe) == 0) { /* Control URB */ 644455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 645d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 646d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 647d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 648455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 649455b25fb209c8241e2163b491228b28667d82c1cAlan Stern local_irq_save (flags); 650d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock (&hcd_root_hub_lock); 651d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 652d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 653d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = NULL; 654d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else 655d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = NULL; /* wasn't fully queued */ 656d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock (&hcd_root_hub_lock); 657d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_giveback_urb (hcd, urb, NULL); 659455b25fb209c8241e2163b491228b28667d82c1cAlan Stern local_irq_restore (flags); 660d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported only within usbcore */ 6688561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstruct usb_bus *usb_bus_get(struct usb_bus *bus) 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6708561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (bus) 6718561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman kref_get(&bus->kref); 6728561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return bus; 6738561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman} 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6758561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic void usb_host_release(struct kref *kref) 6768561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman{ 6778561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman struct usb_bus *bus = container_of(kref, struct usb_bus, kref); 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6798561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (bus->release) 6808561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman bus->release(bus); 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported only within usbcore */ 6848561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanvoid usb_bus_put(struct usb_bus *bus) 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bus) 6878561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman kref_put(&bus->kref, usb_host_release); 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6928561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic struct class *usb_host_class; 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6968561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman int retval = 0; 6978561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 6988561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman usb_host_class = class_create(THIS_MODULE, "usb_host"); 6998561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(usb_host_class)) 7008561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman retval = PTR_ERR(usb_host_class); 7018561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return retval; 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7068561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_destroy(usb_host_class); 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->hcpriv = NULL; 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7318561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman kref_init(&bus->kref); 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7484186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (busnum < USB_MAXBUS) { 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (busnum, busmap.busmap); 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = busnum; 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 7554186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -E2BIG; 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 75953f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->class_dev = class_device_create(usb_host_class, NULL, MKDEV(0,0), 76053f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->controller, "usb_host%d", busnum); 7618561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(bus->class_dev)) { 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(busnum, busmap.busmap); 7634186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7648561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return PTR_ERR(bus->class_dev); 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7678561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_set_devdata(bus->class_dev, bus); 7688561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 7714186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7733099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum); 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7964186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 7984186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8003099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8048561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_device_unregister(bus->class_dev); 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8088ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8118ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 812b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 813b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 814b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 816b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 819b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8304186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 8354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8464186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 861d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_enable_root_hub_irq (struct usb_bus *bus) 862d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 863d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct usb_hcd *hcd; 864d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 865d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd = container_of (bus, struct usb_hcd, self); 866d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->driver->hub_irq_enable && !hcd->poll_rh && 867d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->state != HC_STATE_HALT) 868d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->driver->hub_irq_enable (hcd); 869d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 870d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 909498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 911498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_calc_bus_time); 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_check_bandwidth(): 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * old_alloc is from host_controller->bandwidth_allocated in microseconds; 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bustime is from calc_bus_time(), but converted to microseconds. 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns <bustime in us> if successful, 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or -ENOSPC if bandwidth request fails. 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME: 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This initial implementation does not use Endpoint.bInterval 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in managing bandwidth allocation. 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It probably needs to be expanded to use Endpoint.bInterval. 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This can be done as a later enhancement (correction). 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This will also probably require some kind of 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame allocation tracking...meaning, for example, 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that if multiple drivers request interrupts every 10 USB frames, 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they don't all have to be allocated at 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame numbers N, N+10, N+20, etc. Some of them could be at 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+11, N+21, N+31, etc., and others at 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+12, N+22, N+32, etc. 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Similarly for isochronous transfers... 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Individual HCDs can schedule more directly ... this logic 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is not correct for high speed transfers. 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_check_bandwidth (struct usb_device *dev, struct urb *urb) 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int pipe = urb->pipe; 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long bustime; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_in = usb_pipein (pipe); 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_iso = usb_pipeisoc (pipe); 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int old_alloc = dev->bus->bandwidth_allocated; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int new_alloc; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso, 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_maxpacket (dev, pipe, !is_in))); 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_iso) 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime /= urb->number_of_packets; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_alloc = old_alloc + (int) bustime; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) { 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *mode = 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ""; 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "would have "; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "usb_check_bandwidth %sFAILED: %d + %ld = %d usec\n", 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mode, old_alloc, bustime, new_alloc); 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = -ENOSPC; /* report error */ 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return bustime; 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_check_bandwidth); 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_claim_bandwidth - records bandwidth for a periodic transfer 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bustime: bandwidth consumed, in (average) microseconds per frame 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bus bandwidth reservations are recorded purely for diagnostic purposes. 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCDs are expected not to overcommit periodic bandwidth, and to record such 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reservations whenever endpoints are added to the periodic schedule. 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * large its periodic schedule is. 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc) 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated += bustime; 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs++; 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs++; 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = bustime; 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc increased by %d (%s) to %d for %d requesters\n", 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime, 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_claim_bandwidth); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_release_bandwidth - reverses effect of usb_claim_bandwidth() 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This records that previously allocated bandwidth has been released. 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bandwidth is released when endpoints are removed from the host controller's 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * periodic schedule. 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_release_bandwidth (struct usb_device *dev, struct urb *urb, int isoc) 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated -= urb->bandwidth; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs--; 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs--; 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc reduced by %d (%s) to %d for %d requesters\n", 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth, 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = 0; 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_release_bandwidth); 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void urb_unlink (struct urb *urb) 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Release any periodic transfer bandwidth */ 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->bandwidth) 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_release_bandwidth (urb->dev, urb, 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipeisoc (urb->pipe)); 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear all state linking urb to this dev (and hcd) */ 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init (&urb->urb_list); 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* may be called in any context with a valid urb->dev usecount 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller surrenders "ownership" of urb 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * expects usb_submit_urb() to have sanity checked and conditioned all 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inputs in the urb 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1081a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status; 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = urb->dev->bus->hcpriv; 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit(&hcd->self, urb); 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Atomically queue the urb, first to our records, then to the HCD. 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Access to urb->status is controlled by urb->lock ... changes on 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * i/o completion (normal or fault) or unlinking. 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME: verify that quiescing hc works right (RH cleans up) 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (!ep)) 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ENOENT; 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (unlikely (urb->reject)) 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPERM; 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else switch (hcd->state) { 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1111979d5199fee9e80290ddeb532e5993bd15506712David Brownelldoit: 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail (&urb->urb_list, &ep->urb_list); 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = 0; 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1115979d5199fee9e80290ddeb532e5993bd15506712David Brownell case HC_STATE_SUSPENDED: 1116979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* HC upstream links (register access, wakeup signaling) can work 1117979d5199fee9e80290ddeb532e5993bd15506712David Brownell * even when the downstream links (and DMA etc) are quiesced; let 1118979d5199fee9e80290ddeb532e5993bd15506712David Brownell * usbcore talk to the root hub. 1119979d5199fee9e80290ddeb532e5993bd15506712David Brownell */ 1120979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->self.controller->power.power_state.event == PM_EVENT_ON 1121979d5199fee9e80290ddeb532e5993bd15506712David Brownell && urb->dev->parent == NULL) 1122979d5199fee9e80290ddeb532e5993bd15506712David Brownell goto doit; 1123979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* FALL THROUGH */ 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ESHUTDOWN; 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&urb->urb_list); 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* increment urb's reference count as part of giving it to the HCD 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (which now controls it). HCD guarantees that it either returns 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * an error or calls giveback(), but not both. 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb = usb_get_urb (urb); 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc (&urb->use_count); 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) { 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: requirement on hub callers (usbfs and the hub 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver, for now) that URBs' urb->transfer_buffer be 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * valid and usb_buffer_{sync,unmap}() not be needed, since 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they could clobber root hub response data. 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = rh_urb_enqueue (hcd, urb); 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lower level hcd code should use *_dma exclusively, 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1155dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern if (hcd->self.uses_dma) { 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_dma = dma_map_single ( 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (status)) { 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->reject) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* called in any context */ 1190a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = (struct usb_hcd *)udev->bus->hcpriv; 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!HC_IS_RUNNING (hcd->state)) 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ESHUTDOWN; 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd->driver->get_frame_number (hcd); 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunlink1 (struct usb_hcd *hcd, struct urb *urb) 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = usb_rh_urb_dequeue (hcd, urb); 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = hcd->driver->urb_dequeue (hcd, urb); 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (value != 0) 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "dequeue %p --> %d\n", 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, value); 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1232a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = NULL; 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *sys = NULL; 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *tmp; 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb) 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb->dev || !urb->dev->bus) 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we contend for urb->status with the hcd core, 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * which changes it while returning the urb. 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Caller guaranteed that the urb pointer hasn't been freed, and 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that it was submitted. But as a rule it can't know whether or 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not it's already been unlinked ... so we respect the reversed 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * lock sequence needed for the usb_hcd_giveback_urb() code paths 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (urb lock, then hcd_data_lock) in case some other CPU is now 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlinking it. 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&urb->lock, flags); 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sys = &urb->dev->dev; 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = urb->dev->bus->hcpriv; 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd == NULL) { 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ENODEV; 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* insist the urb is still queued */ 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(tmp, &ep->urb_list) { 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == &urb->urb_list) 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp != &urb->urb_list) { 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EIDRM; 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Any status except -EINPROGRESS means something already started to 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlink this URB from the hardware. So there's no more work to do. 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) { 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EBUSY; 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* IRQ setup can easily be broken so that USB controllers 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * never get completion IRQs ... maybe even the ones we need to 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * finish unlinking the initial failed usb_set_address() 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or device descriptor fetch. 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12948de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) 12958de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt && hcd->self.root_hub != urb->dev) { 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_warn (hcd->self.controller, "Unlink after no-IRQ? " 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Controller is probably using the wrong IRQ." 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "\n"); 12998de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = unlink1 (hcd, urb); 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != -EIDRM && sys && sys->driver) 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (sys, "hcd_unlink_urb %p fail %d\n", urb, retval); 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* disables the endpoint: cancels any pending urbs, then synchronizes with 1323455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * the hcd to make sure all endpoint state is gone from hardware, and then 1324455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * waits until the endpoint's queue is completely drained. use for 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set_configuration, set_interface, driver removal, physical disconnect. 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example: a qh stored in ep->hcpriv, holding state related to endpoint 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * type, maxpacket size, toggle, halt status, and scheduling. 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1330a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternvoid usb_hcd_endpoint_disable (struct usb_device *udev, 1331a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = udev->bus->hcpriv; 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1338d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT && 1339d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern udev->state != USB_STATE_NOTATTACHED); 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_disable (); 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ep is already gone from udev->ep_{in,out}[]; no more submits */ 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrescan: 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tmp; 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1349455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* the urb may already have been unlinked */ 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->status; 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = -ESHUTDOWN; 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* kick hcd unless it's already returning this */ 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) { 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->pipe; 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unlink1 (hcd, urb); 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "shutdown urb %p pipe %08x ep%d%s%s\n", 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, tmp, usb_pipeendpoint (tmp), 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (tmp & USB_DIR_IN) ? "in" : "out", 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ({ char *s; \ 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (usb_pipetype (tmp)) { \ 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_CONTROL: s = ""; break; \ 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_BULK: s = "-bulk"; break; \ 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_INTERRUPT: s = "-intr"; break; \ 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: s = "-iso"; break; \ 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; s;})); 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_enable (); 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* synchronize with the hardware, so old configuration state 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clears out immediately (and will be freed). 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds might_sleep (); 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->endpoint_disable) 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->endpoint_disable (hcd, ep); 1391455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1392455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* Wait until the endpoint queue is completely empty. Most HCDs 1393455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * will have done this already in their endpoint_disable method, 1394455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * but some might not. And there could be root-hub control URBs 1395455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * still pending since they aren't affected by the HCDs' 1396455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * endpoint_disable methods. 1397455b25fb209c8241e2163b491228b28667d82c1cAlan Stern */ 1398455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1399455b25fb209c8241e2163b491228b28667d82c1cAlan Stern spin_lock_irq (&hcd_data_lock); 1400455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1401455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1402455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1403455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1404455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1405455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1406455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1407455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1408455b25fb209c8241e2163b491228b28667d82c1cAlan Stern spin_unlock_irq (&hcd_data_lock); 1409455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1410455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1411455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1412455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1413455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1414455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14199293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14210c0382e32d46f606951010b202382be14d180a17Alan Sternint hcd_bus_suspend (struct usb_bus *bus) 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14249293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell int status; 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14270c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_suspend) 14289293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 14299293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_QUIESCING; 14300c0382e32d46f606951010b202382be14d180a17Alan Stern status = hcd->driver->bus_suspend (hcd); 14319293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell if (status == 0) 14329293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 14339293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell else 14349293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", 14359293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 14369293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14390c0382e32d46f606951010b202382be14d180a17Alan Sternint hcd_bus_resume (struct usb_bus *bus) 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14429293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell int status; 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14450c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 14469293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1447979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1448979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 14499293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 14500c0382e32d46f606951010b202382be14d180a17Alan Stern status = hcd->driver->bus_resume (hcd); 14519293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell if (status == 0) 14529293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 14539293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell else { 14549293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", 14559293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 14569293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell usb_hc_died(hcd); 14579293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 14589293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461979d5199fee9e80290ddeb532e5993bd15506712David Brownell/* 1462979d5199fee9e80290ddeb532e5993bd15506712David Brownell * usb_hcd_suspend_root_hub - HCD autosuspends downstream ports 1463979d5199fee9e80290ddeb532e5993bd15506712David Brownell * @hcd: host controller for this root hub 1464979d5199fee9e80290ddeb532e5993bd15506712David Brownell * 1465979d5199fee9e80290ddeb532e5993bd15506712David Brownell * This call arranges that usb_hcd_resume_root_hub() is safe to call later; 1466979d5199fee9e80290ddeb532e5993bd15506712David Brownell * that the HCD's root hub polling is deactivated; and that the root's hub 1467979d5199fee9e80290ddeb532e5993bd15506712David Brownell * driver is suspended. HCDs may call this to autosuspend when their root 1468979d5199fee9e80290ddeb532e5993bd15506712David Brownell * hub's downstream ports are all inactive: unpowered, disconnected, 1469979d5199fee9e80290ddeb532e5993bd15506712David Brownell * disabled, or suspended. 1470979d5199fee9e80290ddeb532e5993bd15506712David Brownell * 1471979d5199fee9e80290ddeb532e5993bd15506712David Brownell * The HCD will autoresume on device connect change detection (using SRP 1472979d5199fee9e80290ddeb532e5993bd15506712David Brownell * or a D+/D- pullup). The HCD also autoresumes on remote wakeup signaling 1473979d5199fee9e80290ddeb532e5993bd15506712David Brownell * from any ports that are suspended (if that is enabled). In most cases, 1474979d5199fee9e80290ddeb532e5993bd15506712David Brownell * overcurrent signaling (on powered ports) will also start autoresume. 1475979d5199fee9e80290ddeb532e5993bd15506712David Brownell * 1476979d5199fee9e80290ddeb532e5993bd15506712David Brownell * Always called with IRQs blocked. 1477979d5199fee9e80290ddeb532e5993bd15506712David Brownell */ 1478979d5199fee9e80290ddeb532e5993bd15506712David Brownellvoid usb_hcd_suspend_root_hub (struct usb_hcd *hcd) 1479979d5199fee9e80290ddeb532e5993bd15506712David Brownell{ 1480979d5199fee9e80290ddeb532e5993bd15506712David Brownell struct urb *urb; 1481979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1482979d5199fee9e80290ddeb532e5993bd15506712David Brownell spin_lock (&hcd_root_hub_lock); 1483979d5199fee9e80290ddeb532e5993bd15506712David Brownell usb_suspend_root_hub (hcd->self.root_hub); 1484979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1485979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* force status urb to complete/unlink while suspended */ 1486979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->status_urb) { 1487979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb = hcd->status_urb; 1488979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb->status = -ECONNRESET; 1489979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb->hcpriv = NULL; 1490979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb->actual_length = 0; 1491979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1492979d5199fee9e80290ddeb532e5993bd15506712David Brownell del_timer (&hcd->rh_timer); 1493979d5199fee9e80290ddeb532e5993bd15506712David Brownell hcd->poll_pending = 0; 1494979d5199fee9e80290ddeb532e5993bd15506712David Brownell hcd->status_urb = NULL; 1495979d5199fee9e80290ddeb532e5993bd15506712David Brownell } else 1496979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb = NULL; 1497979d5199fee9e80290ddeb532e5993bd15506712David Brownell spin_unlock (&hcd_root_hub_lock); 1498979d5199fee9e80290ddeb532e5993bd15506712David Brownell hcd->state = HC_STATE_SUSPENDED; 1499979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1500979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (urb) 1501979d5199fee9e80290ddeb532e5993bd15506712David Brownell usb_hcd_giveback_urb (hcd, urb, NULL); 1502979d5199fee9e80290ddeb532e5993bd15506712David Brownell} 1503979d5199fee9e80290ddeb532e5993bd15506712David BrownellEXPORT_SYMBOL_GPL(usb_hcd_suspend_root_hub); 1504979d5199fee9e80290ddeb532e5993bd15506712David Brownell 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wakeup request is received. It queues a request for khubd to 1512979d5199fee9e80290ddeb532e5993bd15506712David Brownell * resume the root hub (that is, manage its downstream ports again). 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_resume_root_hub (hcd->self.root_hub); 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15239293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_bus_start_enum); 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_giveback_urb - return URB from HCD to device driver 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller returning the URB 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: urb being returned to the USB device driver. 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @regs: pt_regs, passed down to the URB completion handler 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This hands the URB from HCD to its USB device driver, using its 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion function. The HCD has freed all per-urb resources 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (and is done using urb->hcpriv). It also released all HCD locks; 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device driver won't cause problems if it frees, modifies, 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or resubmits this URB. 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs) 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int at_root_hub; 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at_root_hub = (urb->dev == hcd->self.root_hub); 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1588dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern /* lower level hcd code should use *_dma exclusively if the 1589dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern * host controller does DMA */ 1590dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern if (hcd->self.uses_dma && !at_root_hub) { 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, urb->setup_dma, 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma, 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_complete (&hcd->self, urb); 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* pass ownership to the completion handler */ 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->complete (urb, regs); 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (urb->reject)) 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_hcd_giveback_urb); 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @r: saved hardware registers 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsirqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs * r) 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start = hcd->state; 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16328de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(start == HC_STATE_HALT || 16338de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq (hcd, r) == IRQ_NONE) 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16388de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 16398de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 16408de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(hcd->state == HC_STATE_HALT)) 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1663d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hcd_release (struct usb_bus *bus) 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of(bus, struct usb_hcd, self); 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(hcd); 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *dev, char *bus_name) 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17027b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.hcpriv = hcd; 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.release = &hcd_release; 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1714dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1717d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1718d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_create_hcd); 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(hcd->self.controller, NULL); 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_put(&hcd->self); 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_put_hcd); 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17488ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 17498ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17538de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 17548de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1755b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 1756b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 1757b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 1758b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 17658ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1767b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 1768b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 1769b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 1770b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 1771b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1772b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : 1773b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell USB_SPEED_FULL; 1774b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 1775b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1776db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 1777db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 1778db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 1779db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 1780db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 1781db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 1782b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 1783b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 1784b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 1785b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 1786b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 1787b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 1788b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1789b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1790fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 1791fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 1792fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 1793b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 1794b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1795b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 1802c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 18038ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 1806c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 18218ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1824b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 182555c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 1826b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 18278ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 18288ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 1829d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 1830d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1833b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 18348ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 1835b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 1838b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 1839b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 1840b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 1841b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 1842b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 1844b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_add_hcd); 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 18699ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 18704186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 18724186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1874d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 1875d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern del_timer_sync(&hcd->rh_timer); 1876d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 18791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 18811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 18821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 18831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_remove_hcd); 18861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 188764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 188864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 188964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 189064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 189164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 189264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 189364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 189464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 189564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey GorelovEXPORT_SYMBOL (usb_hcd_platform_shutdown); 189664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 18971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18994749f32da939d4e4160541b2cadc22492bb507ecAdrian Bunk#if defined(CONFIG_USB_MON) 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_MON */ 1936