hcd.c revision 9ad3d6ccf5eee285e233dbaf186369b8d477a666
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Linus Torvalds 1999 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Johannes Erdfelt 1999-2001 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Andreas Gal 1999 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Gregory P. Smith 1999 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Deti Fliegl 1999 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Randy Dunlap 2000 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright David Brownell 2000-2002 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * option) any later version. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software Foundation, 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/scatterlist.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// #define USB_BANDWIDTH_MESSAGES 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_MUTEX (usb_bus_list_lock); /* exported only for usbfs */ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating hcd data */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_data_lock); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDeviceProtocol; [ usb 2.0 single TT ]*/ 12816f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idVendor; */ 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idProduct; */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 15116f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idVendor; */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x00, /* __le16 idProduct; */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ascii2utf (char *s, u8 *utf, int utfmax) 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @type: string describing our driver 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_string ( 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int id, 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd, 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *data, 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds) { 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = min (len, 4); 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf (buf, sizeof buf, "%s %s %s", system_utsname.sysname, 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds system_utsname.release, hcd->driver->description); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // unsupported IDs --> "protocol stall" 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPIPE; 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 tbuf [sizeof (struct usb_hub_descriptor)]; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len = 0; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int patch_wakeup = 0; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = 0; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int n; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = (hcd->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP) 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->remote_wakeup = 0; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->can_wakeup && wValue == USB_DEVICE_REMOTE_WAKEUP) 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->remote_wakeup = 1; 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) { 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->can_wakeup) 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rh_string (wValue & 0xff, hcd, ubuf, wLength); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n < 0) 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = n; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 456b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 457b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 458b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 459b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 460b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 461b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 462b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 463b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 465b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 466b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 467b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 481b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_save (flags); 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status == -EINPROGRESS) 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hcd_giveback_urb (hcd, urb, NULL); 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_restore (flags); 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 513d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 514d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 515d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 517d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 518d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 520d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 521d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 522d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 523d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 524d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 525d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 527d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 528d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 530d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 531d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 533d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 534d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_save (flags); 535d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock(&hcd_root_hub_lock); 536d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 537d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 538d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock(&urb->lock); 539d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb->status == -EINPROGRESS) { 540d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 0; 541d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 542d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->status = 0; 543d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = NULL; 544d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->actual_length = length; 545d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern memcpy(urb->transfer_buffer, buffer, length); 546d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else /* urb has been unlinked */ 547d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 548d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock(&urb->lock); 549d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else 550d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 551d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock(&hcd_root_hub_lock); 552d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 553d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* local irqs are always blocked in completions */ 554d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) 555d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_giveback_urb (hcd, urb, NULL); 556d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else 557d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 558d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_restore (flags); 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 562d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * exceed that limit if HZ is 100. */ 563d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 564d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 565d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies + msecs_to_jiffies(250)); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 567d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 570d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 571d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 572d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 573d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 574d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 575d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 577d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 579d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 581d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int len = 1 + (urb->dev->maxchild / 8); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 583d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 584d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb->status != -EINPROGRESS) /* already unlinked */ 585d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = urb->status; 586d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else if (hcd->status_urb || urb->transfer_buffer_length < len) { 587d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 588d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 589d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { 590d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = urb; 591d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = hcd; /* indicate it's queued */ 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 593d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 594d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies + 595d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern msecs_to_jiffies(250)); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 597d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* If a status change has already occurred, report it ASAP */ 598d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern else if (hcd->poll_pending) 599d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern mod_timer (&hcd->rh_timer, jiffies); 600d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = 0; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 602d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 603d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 608d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (usb_pipeint (urb->pipe)) 609d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe)) 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 612d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 617d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/* Asynchronous unlinks of root-hub control URBs are legal, but they 618d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * don't do anything. Status URB unlinks must be made in process context 619d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * with interrupts enabled. 620d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 623d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (usb_pipeendpoint(urb->pipe) == 0) { /* Control URB */ 624d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (in_interrupt()) 625d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return 0; /* nothing to do */ 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&urb->lock); /* from usb_kill_urb */ 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++urb->reject; 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&urb->lock); 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_event(usb_kill_urb_queue, 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_read(&urb->use_count) == 0); 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&urb->lock); 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds --urb->reject; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&urb->lock); 637d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 638d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 639d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 640d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern del_timer_sync (&hcd->rh_timer); 641d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_disable (); 642d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock (&hcd_root_hub_lock); 643d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 644d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 645d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb->hcpriv = NULL; 646d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else 647d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = NULL; /* wasn't fully queued */ 648d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock (&hcd_root_hub_lock); 649d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) 650d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_giveback_urb (hcd, urb, NULL); 651d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern local_irq_enable (); 652d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported only within usbcore */ 6608561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstruct usb_bus *usb_bus_get(struct usb_bus *bus) 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6628561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (bus) 6638561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman kref_get(&bus->kref); 6648561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return bus; 6658561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman} 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6678561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic void usb_host_release(struct kref *kref) 6688561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman{ 6698561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman struct usb_bus *bus = container_of(kref, struct usb_bus, kref); 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6718561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (bus->release) 6728561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman bus->release(bus); 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* exported only within usbcore */ 6768561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanvoid usb_bus_put(struct usb_bus *bus) 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bus) 6798561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman kref_put(&bus->kref, usb_host_release); 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6848561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic struct class *usb_host_class; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6888561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman int retval = 0; 6898561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 6908561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman usb_host_class = class_create(THIS_MODULE, "usb_host"); 6918561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(usb_host_class)) 6928561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman retval = PTR_ERR(usb_host_class); 6938561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return retval; 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6988561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_destroy(usb_host_class); 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->hcpriv = NULL; 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7238561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman kref_init(&bus->kref); 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_alloc_bus - creates a new USB host controller structure 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @op: pointer to a struct usb_operations that this bus structure should use 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Creates a USB host controller bus structure with the specified 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_operations and initializes all the necessary internal objects. 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If no memory is available, NULL is returned. 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The caller should call usb_put_bus() when it is finished with the structure. 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_bus *usb_alloc_bus (struct usb_operations *op) 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_bus *bus; 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7420a1ef3b5a765a6f20e7b8caf295aad3276243966Alan Stern bus = kzalloc (sizeof *bus, GFP_KERNEL); 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus) 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init (bus); 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->op = op; 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return bus; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down (&usb_bus_list_lock); 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (busnum < USB_MAXBUS) { 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (busnum, busmap.busmap); 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = busnum; 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&usb_bus_list_lock); 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -E2BIG; 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 77553f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->class_dev = class_device_create(usb_host_class, NULL, MKDEV(0,0), 77653f4654272df7c51064825024340554b39c9efbaGreg Kroah-Hartman bus->controller, "usb_host%d", busnum); 7778561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(bus->class_dev)) { 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(busnum, busmap.busmap); 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&usb_bus_list_lock); 7808561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return PTR_ERR(bus->class_dev); 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7838561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_set_devdata(bus->class_dev, bus); 7848561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7893099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum); 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down (&usb_bus_list_lock); 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8163099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8208561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_device_unregister(bus->class_dev); 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8248ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @usb_dev: the usb root hub device to be registered. 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8288ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 8298ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * the device properly in the device tree and stores the root_hub pointer 8308ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * in the bus structure, then calls usb_new_device() to register the usb 8318ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * device. It also assigns the root hub's USB address (always 1). 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8338ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Sternstatic int register_root_hub (struct usb_device *usb_dev, 8348ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_hcd *hcd) 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down (&usb_bus_list_lock); 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->root_hub = usb_dev; 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->root_hub = NULL; 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->root_hub = NULL; 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->dev.bus_id, retval); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up (&usb_bus_list_lock); 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 881d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_enable_root_hub_irq (struct usb_bus *bus) 882d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 883d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct usb_hcd *hcd; 884d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 885d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd = container_of (bus, struct usb_hcd, self); 886d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->driver->hub_irq_enable && !hcd->poll_rh && 887d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->state != HC_STATE_HALT) 888d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->driver->hub_irq_enable (hcd); 889d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 890d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 929498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 931498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_calc_bus_time); 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_check_bandwidth(): 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * old_alloc is from host_controller->bandwidth_allocated in microseconds; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bustime is from calc_bus_time(), but converted to microseconds. 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * returns <bustime in us> if successful, 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or -ENOSPC if bandwidth request fails. 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME: 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This initial implementation does not use Endpoint.bInterval 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in managing bandwidth allocation. 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It probably needs to be expanded to use Endpoint.bInterval. 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This can be done as a later enhancement (correction). 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This will also probably require some kind of 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame allocation tracking...meaning, for example, 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that if multiple drivers request interrupts every 10 USB frames, 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they don't all have to be allocated at 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * frame numbers N, N+10, N+20, etc. Some of them could be at 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+11, N+21, N+31, etc., and others at 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * N+12, N+22, N+32, etc. 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Similarly for isochronous transfers... 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Individual HCDs can schedule more directly ... this logic 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is not correct for high speed transfers. 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_check_bandwidth (struct usb_device *dev, struct urb *urb) 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int pipe = urb->pipe; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long bustime; 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_in = usb_pipein (pipe); 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int is_iso = usb_pipeisoc (pipe); 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int old_alloc = dev->bus->bandwidth_allocated; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int new_alloc; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso, 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_maxpacket (dev, pipe, !is_in))); 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_iso) 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime /= urb->number_of_packets; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_alloc = old_alloc + (int) bustime; 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) { 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *mode = 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ""; 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "would have "; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "usb_check_bandwidth %sFAILED: %d + %ld = %d usec\n", 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mode, old_alloc, bustime, new_alloc); 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_BANDWIDTH 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime = -ENOSPC; /* report error */ 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return bustime; 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_check_bandwidth); 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_claim_bandwidth - records bandwidth for a periodic transfer 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bustime: bandwidth consumed, in (average) microseconds per frame 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bus bandwidth reservations are recorded purely for diagnostic purposes. 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCDs are expected not to overcommit periodic bandwidth, and to record such 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * reservations whenever endpoints are added to the periodic schedule. 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * large its periodic schedule is. 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc) 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated += bustime; 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs++; 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs++; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = bustime; 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc increased by %d (%s) to %d for %d requesters\n", 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bustime, 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_claim_bandwidth); 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_release_bandwidth - reverses effect of usb_claim_bandwidth() 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: source/target of request 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: request (urb->dev == dev) 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true iff the request is isochronous 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This records that previously allocated bandwidth has been released. 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bandwidth is released when endpoints are removed from the host controller's 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * periodic schedule. 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_release_bandwidth (struct usb_device *dev, struct urb *urb, int isoc) 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated -= urb->bandwidth; 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_isoc_reqs--; 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs--; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef USB_BANDWIDTH_MESSAGES 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (&dev->dev, "bandwidth alloc reduced by %d (%s) to %d for %d requesters\n", 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth, 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isoc ? "ISOC" : "INTR", 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_allocated, 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->bandwidth = 0; 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_release_bandwidth); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void urb_unlink (struct urb *urb) 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Release any periodic transfer bandwidth */ 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->bandwidth) 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_release_bandwidth (urb->dev, urb, 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipeisoc (urb->pipe)); 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear all state linking urb to this dev (and hcd) */ 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del_init (&urb->urb_list); 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_dev (urb->dev); 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* may be called in any context with a valid urb->dev usecount 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller surrenders "ownership" of urb 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * expects usb_submit_urb() to have sanity checked and conditioned all 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * inputs in the urb 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 110255016f10e31bb15b85d8c500f979dfdceb37d548Al Virostatic int hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status; 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = urb->dev->bus->hcpriv; 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit(&hcd->self, urb); 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Atomically queue the urb, first to our records, then to the HCD. 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Access to urb->status is controlled by urb->lock ... changes on 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * i/o completion (normal or fault) or unlinking. 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME: verify that quiescing hc works right (RH cleans up) 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_data_lock, flags); 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (!ep)) 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ENOENT; 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (unlikely (urb->reject)) 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPERM; 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else switch (hcd->state) { 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1132979d5199fee9e80290ddeb532e5993bd15506712David Brownelldoit: 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_dev (urb->dev); 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail (&urb->urb_list, &ep->urb_list); 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = 0; 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1137979d5199fee9e80290ddeb532e5993bd15506712David Brownell case HC_STATE_SUSPENDED: 1138979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* HC upstream links (register access, wakeup signaling) can work 1139979d5199fee9e80290ddeb532e5993bd15506712David Brownell * even when the downstream links (and DMA etc) are quiesced; let 1140979d5199fee9e80290ddeb532e5993bd15506712David Brownell * usbcore talk to the root hub. 1141979d5199fee9e80290ddeb532e5993bd15506712David Brownell */ 1142979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->self.controller->power.power_state.event == PM_EVENT_ON 1143979d5199fee9e80290ddeb532e5993bd15506712David Brownell && urb->dev->parent == NULL) 1144979d5199fee9e80290ddeb532e5993bd15506712David Brownell goto doit; 1145979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* FALL THROUGH */ 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -ESHUTDOWN; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_data_lock, flags); 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&urb->urb_list); 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* increment urb's reference count as part of giving it to the HCD 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (which now controls it). HCD guarantees that it either returns 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * an error or calls giveback(), but not both. 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb = usb_get_urb (urb); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_inc (&urb->use_count); 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) { 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: requirement on hub callers (usbfs and the hub 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver, for now) that URBs' urb->transfer_buffer be 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * valid and usb_buffer_{sync,unmap}() not be needed, since 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * they could clobber root hub response data. 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = rh_urb_enqueue (hcd, urb); 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lower level hcd code should use *_dma exclusively, 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->self.controller->dma_mask) { 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_dma = dma_map_single ( 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (status)) { 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->reject) 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* called in any context */ 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_get_frame_number (struct usb_device *udev) 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = (struct usb_hcd *)udev->bus->hcpriv; 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!HC_IS_RUNNING (hcd->state)) 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ESHUTDOWN; 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd->driver->get_frame_number (hcd); 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunlink1 (struct usb_hcd *hcd, struct urb *urb) 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->dev == hcd->self.root_hub) 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = usb_rh_urb_dequeue (hcd, urb); 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = hcd->driver->urb_dequeue (hcd, urb); 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (value != 0) 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "dequeue %p --> %d\n", 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, value); 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hcd_unlink_urb (struct urb *urb, int status) 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_host_endpoint *ep; 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = NULL; 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *sys = NULL; 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *tmp; 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb) 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!urb->dev || !urb->dev->bus) 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [usb_pipeendpoint(urb->pipe)]; 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we contend for urb->status with the hcd core, 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * which changes it while returning the urb. 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Caller guaranteed that the urb pointer hasn't been freed, and 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that it was submitted. But as a rule it can't know whether or 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not it's already been unlinked ... so we respect the reversed 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * lock sequence needed for the usb_hcd_giveback_urb() code paths 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (urb lock, then hcd_data_lock) in case some other CPU is now 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlinking it. 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&urb->lock, flags); 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sys = &urb->dev->dev; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = urb->dev->bus->hcpriv; 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd == NULL) { 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ENODEV; 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* insist the urb is still queued */ 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(tmp, &ep->urb_list) { 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == &urb->urb_list) 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp != &urb->urb_list) { 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EIDRM; 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Any status except -EINPROGRESS means something already started to 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unlink this URB from the hardware. So there's no more work to do. 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) { 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EBUSY; 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto done; 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* IRQ setup can easily be broken so that USB controllers 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * never get completion IRQs ... maybe even the ones we need to 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * finish unlinking the initial failed usb_set_address() 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or device descriptor fetch. 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13168de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) 13178de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt && hcd->self.root_hub != urb->dev) { 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_warn (hcd->self.controller, "Unlink after no-IRQ? " 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "Controller is probably using the wrong IRQ." 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "\n"); 13218de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = status; 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = unlink1 (hcd, urb); 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdone: 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&urb->lock, flags); 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != -EIDRM && sys && sys->driver) 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (sys, "hcd_unlink_urb %p fail %d\n", urb, retval); 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* disables the endpoint: cancels any pending urbs, then synchronizes with 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the hcd to make sure all endpoint state is gone from hardware. use for 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set_configuration, set_interface, driver removal, physical disconnect. 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example: a qh stored in ep->hcpriv, holding state related to endpoint 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * type, maxpacket size, toggle, halt status, and scheduling. 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshcd_endpoint_disable (struct usb_device *udev, struct usb_host_endpoint *ep) 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = udev->bus->hcpriv; 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1359d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT && 1360d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern udev->state != USB_STATE_NOTATTACHED); 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_disable (); 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FIXME move most of this into message.c as part of its 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * endpoint disable logic 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ep is already gone from udev->ep_{in,out}[]; no more submits */ 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrescan: 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&hcd_data_lock); 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int tmp; 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* another cpu may be in hcd, spinning on hcd_data_lock 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to giveback() this urb. the races here should be 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * small, but a full fix needs a new "can't submit" 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * urb state. 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FIXME urb->reject should allow that... 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status != -EINPROGRESS) 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock (&urb->lock); 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->status; 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = -ESHUTDOWN; 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&urb->lock); 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* kick hcd unless it's already returning this */ 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp == -EINPROGRESS) { 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = urb->pipe; 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unlink1 (hcd, urb); 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "shutdown urb %p pipe %08x ep%d%s%s\n", 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb, tmp, usb_pipeendpoint (tmp), 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (tmp & USB_DIR_IN) ? "in" : "out", 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ({ char *s; \ 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (usb_pipetype (tmp)) { \ 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_CONTROL: s = ""; break; \ 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_BULK: s = "-bulk"; break; \ 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PIPE_INTERRUPT: s = "-intr"; break; \ 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: s = "-iso"; break; \ 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; s;})); 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock (&hcd_data_lock); 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds local_irq_enable (); 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* synchronize with the hardware, so old configuration state 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clears out immediately (and will be freed). 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds might_sleep (); 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->endpoint_disable) 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->endpoint_disable (hcd, ep); 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14259293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14270c0382e32d46f606951010b202382be14d180a17Alan Sternint hcd_bus_suspend (struct usb_bus *bus) 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14309293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell int status; 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14330c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_suspend) 14349293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 14359293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_QUIESCING; 14360c0382e32d46f606951010b202382be14d180a17Alan Stern status = hcd->driver->bus_suspend (hcd); 14379293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell if (status == 0) 14389293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 14399293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell else 14409293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", 14419293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 14429293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14450c0382e32d46f606951010b202382be14d180a17Alan Sternint hcd_bus_resume (struct usb_bus *bus) 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14489293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell int status; 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 14510c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 14529293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1453979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1454979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 14559293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 14560c0382e32d46f606951010b202382be14d180a17Alan Stern status = hcd->driver->bus_resume (hcd); 14579293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell if (status == 0) 14589293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 14599293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell else { 14609293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", 14619293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 14629293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell usb_hc_died(hcd); 14639293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 14649293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1467979d5199fee9e80290ddeb532e5993bd15506712David Brownell/* 1468979d5199fee9e80290ddeb532e5993bd15506712David Brownell * usb_hcd_suspend_root_hub - HCD autosuspends downstream ports 1469979d5199fee9e80290ddeb532e5993bd15506712David Brownell * @hcd: host controller for this root hub 1470979d5199fee9e80290ddeb532e5993bd15506712David Brownell * 1471979d5199fee9e80290ddeb532e5993bd15506712David Brownell * This call arranges that usb_hcd_resume_root_hub() is safe to call later; 1472979d5199fee9e80290ddeb532e5993bd15506712David Brownell * that the HCD's root hub polling is deactivated; and that the root's hub 1473979d5199fee9e80290ddeb532e5993bd15506712David Brownell * driver is suspended. HCDs may call this to autosuspend when their root 1474979d5199fee9e80290ddeb532e5993bd15506712David Brownell * hub's downstream ports are all inactive: unpowered, disconnected, 1475979d5199fee9e80290ddeb532e5993bd15506712David Brownell * disabled, or suspended. 1476979d5199fee9e80290ddeb532e5993bd15506712David Brownell * 1477979d5199fee9e80290ddeb532e5993bd15506712David Brownell * The HCD will autoresume on device connect change detection (using SRP 1478979d5199fee9e80290ddeb532e5993bd15506712David Brownell * or a D+/D- pullup). The HCD also autoresumes on remote wakeup signaling 1479979d5199fee9e80290ddeb532e5993bd15506712David Brownell * from any ports that are suspended (if that is enabled). In most cases, 1480979d5199fee9e80290ddeb532e5993bd15506712David Brownell * overcurrent signaling (on powered ports) will also start autoresume. 1481979d5199fee9e80290ddeb532e5993bd15506712David Brownell * 1482979d5199fee9e80290ddeb532e5993bd15506712David Brownell * Always called with IRQs blocked. 1483979d5199fee9e80290ddeb532e5993bd15506712David Brownell */ 1484979d5199fee9e80290ddeb532e5993bd15506712David Brownellvoid usb_hcd_suspend_root_hub (struct usb_hcd *hcd) 1485979d5199fee9e80290ddeb532e5993bd15506712David Brownell{ 1486979d5199fee9e80290ddeb532e5993bd15506712David Brownell struct urb *urb; 1487979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1488979d5199fee9e80290ddeb532e5993bd15506712David Brownell spin_lock (&hcd_root_hub_lock); 1489979d5199fee9e80290ddeb532e5993bd15506712David Brownell usb_suspend_root_hub (hcd->self.root_hub); 1490979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1491979d5199fee9e80290ddeb532e5993bd15506712David Brownell /* force status urb to complete/unlink while suspended */ 1492979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->status_urb) { 1493979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb = hcd->status_urb; 1494979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb->status = -ECONNRESET; 1495979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb->hcpriv = NULL; 1496979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb->actual_length = 0; 1497979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1498979d5199fee9e80290ddeb532e5993bd15506712David Brownell del_timer (&hcd->rh_timer); 1499979d5199fee9e80290ddeb532e5993bd15506712David Brownell hcd->poll_pending = 0; 1500979d5199fee9e80290ddeb532e5993bd15506712David Brownell hcd->status_urb = NULL; 1501979d5199fee9e80290ddeb532e5993bd15506712David Brownell } else 1502979d5199fee9e80290ddeb532e5993bd15506712David Brownell urb = NULL; 1503979d5199fee9e80290ddeb532e5993bd15506712David Brownell spin_unlock (&hcd_root_hub_lock); 1504979d5199fee9e80290ddeb532e5993bd15506712David Brownell hcd->state = HC_STATE_SUSPENDED; 1505979d5199fee9e80290ddeb532e5993bd15506712David Brownell 1506979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (urb) 1507979d5199fee9e80290ddeb532e5993bd15506712David Brownell usb_hcd_giveback_urb (hcd, urb, NULL); 1508979d5199fee9e80290ddeb532e5993bd15506712David Brownell} 1509979d5199fee9e80290ddeb532e5993bd15506712David BrownellEXPORT_SYMBOL_GPL(usb_hcd_suspend_root_hub); 1510979d5199fee9e80290ddeb532e5993bd15506712David Brownell 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * wakeup request is received. It queues a request for khubd to 1518979d5199fee9e80290ddeb532e5993bd15506712David Brownell * resume the root hub (that is, manage its downstream ports again). 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_resume_root_hub (hcd->self.root_hub); 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15299293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_bus_start_enum); 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_operations - adapts usb_bus framework to HCD framework (bus glue) 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_operations usb_hcd_operations = { 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .get_frame_number = hcd_get_frame_number, 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .submit_urb = hcd_submit_urb, 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .unlink_urb = hcd_unlink_urb, 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .buffer_alloc = hcd_buffer_alloc, 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .buffer_free = hcd_buffer_free, 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .disable = hcd_endpoint_disable, 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_giveback_urb - return URB from HCD to device driver 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller returning the URB 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @urb: urb being returned to the USB device driver. 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @regs: pt_regs, passed down to the URB completion handler 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This hands the URB from HCD to its USB device driver, using its 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion function. The HCD has freed all per-urb resources 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (and is done using urb->hcpriv). It also released all HCD locks; 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the device driver won't cause problems if it frees, modifies, 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or resubmits this URB. 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs) 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int at_root_hub; 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds at_root_hub = (urb->dev == hcd->self.root_hub); 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb_unlink (urb); 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lower level hcd code should use *_dma exclusively */ 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->self.controller->dma_mask && !at_root_hub) { 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usb_pipecontrol (urb->pipe) 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, urb->setup_dma, 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof (struct usb_ctrlrequest), 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length != 0 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dma_unmap_single (hcd->self.controller, 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma, 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_pipein (urb->pipe) 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ? DMA_FROM_DEVICE 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds : DMA_TO_DEVICE); 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_complete (&hcd->self, urb); 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* pass ownership to the completion handler */ 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->complete (urb, regs); 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds atomic_dec (&urb->use_count); 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely (urb->reject)) 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up (&usb_kill_urb_queue); 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_hcd_giveback_urb); 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @r: saved hardware registers 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsirqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs * r) 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int start = hcd->state; 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16518de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(start == HC_STATE_HALT || 16528de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq (hcd, r) == IRQ_NONE) 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_NONE; 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16578de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 16588de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 16598de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt if (unlikely(hcd->state == HC_STATE_HALT)) 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return IRQ_HANDLED; 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1682d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hcd_release (struct usb_bus *bus) 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of(bus, struct usb_hcd, self); 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(hcd); 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *dev, char *bus_name) 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17217b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.op = &usb_hcd_operations; 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.hcpriv = hcd; 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.release = &hcd_release; 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1736d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1737d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_create_hcd); 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(hcd->self.controller, NULL); 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_put(&hcd->self); 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_put_hcd); 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17678ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 17688ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17728de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 17738de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* till now HC has been in an indeterminate state ... */ 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "can't reset\n"); 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 17868ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf[8], *bufp = buf; 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef __sparc__ 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = __irq_itoa(irqnum); 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(buf, "%d", irqnum); 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 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, 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "request interrupt %s failed\n", bufp); 18038ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "irq %s, %s 0x%08llx\n", bufp, 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 18198ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern /* Allocate the root hub before calling hcd->driver->start(), 18208ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * but don't register it until afterward so that the hardware 18218ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * is running. 18228ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern */ 18238ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 18248ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern dev_err(hcd->self.controller, "unable to allocate root hub\n"); 18258ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern retval = -ENOMEM; 18268ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_allocate_root_hub; 18278ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern } 18288ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : 18298ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern USB_SPEED_FULL; 18308ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 18318ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern /* Although in principle hcd->driver->start() might need to use rhdev, 18328ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * none of the current drivers do. 18338ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern */ 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 18368ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18398ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern /* hcd->driver->start() reported can_wakeup, probably with 18408ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * assistance from board's boot firmware. 18418ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * NOTE: normal devices won't enable wakeup by default. 18428ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern */ 18438ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern if (hcd->can_wakeup) 18448ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 18458ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->remote_wakeup = hcd->can_wakeup; 18468ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 18478ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern if ((retval = register_root_hub(rhdev, hcd)) != 0) 18488ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 18498ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 1850d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 1851d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18548ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern err_register_root_hub: 18558ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 18568ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 18578ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern err_hcd_driver_start: 18588ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern usb_put_dev(rhdev); 18598ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 18608ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern err_allocate_root_hub: 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 18638ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 18648ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern err_request_irq: 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 18668ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 18678ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern err_register_bus: 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_add_hcd); 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 18751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 18761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 18791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 18801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 18821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 18861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 18871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 18891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 18901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 18911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 18929ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 18939ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern down(&usb_bus_list_lock); 18941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 18959ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern up(&usb_bus_list_lock); 18961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1897d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 1898d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern del_timer_sync(&hcd->rh_timer); 1899d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL (usb_remove_hcd); 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19124749f32da939d4e4160541b2cadc22492bb507ecAdrian Bunk#if defined(CONFIG_USB_MON) 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 19371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 19401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 19471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_MON */ 1949