hcd.c revision e04748e3a87271fcf30d383e3780c5d3ee1c1618
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Linus Torvalds 1999 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Johannes Erdfelt 1999-2001 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Andreas Gal 1999 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Gregory P. Smith 1999 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Deti Fliegl 1999 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Randy Dunlap 2000 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright David Brownell 2000-2002 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * option) any later version. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software Foundation, 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 38b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm#include <asm/unaligned.h> 3964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov#include <linux/platform_device.h> 406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#include <linux/workqueue.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 849beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 859beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 869beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 879beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 1004186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 106809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 107809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 109cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 111cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 115809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 119809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 131d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 142d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 143d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 151d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1607329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16116f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 163667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 164667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18416f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 186667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 187667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29388fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 297d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 300d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x19, 0x00, /* __le16 wTotalLength; FIXME */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 330d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 331d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 332d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* 333d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * All 3.0 hubs should have an endpoint companion descriptor, 334d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * but we're ignoring that for now. FIXME? 335d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp */ 336d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 337d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34471d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluinstatic unsigned ascii2utf(char *s, u8 *utf, int utfmax) 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned retval; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluinstatic unsigned rh_string(int id, struct usb_hcd *hcd, u8 *data, unsigned len) 37071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 37771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin len = min_t(unsigned, len, 4); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 39196b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 39296b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 39371d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin } 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 41554bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 41654bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 41871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 419e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4207329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4217329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4239439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4249439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 425e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 426e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 427e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 428e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 429e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 430b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 431e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 446fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 447fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 448fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 449fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 450fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 451fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 452fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 453fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 454fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 455fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 456fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 457fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 458fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 459fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 460fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 461fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 463fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 464fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 471fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 476fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 477fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 478fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 491d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp if (hcd->driver->flags & HCD_USB3) 492d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 493d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp else if (hcd->driver->flags & HCD_USB2) 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5007329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5017329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 504d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp if (hcd->driver->flags & HCD_USB3) { 505d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 506d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 507d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp } else if (hcd->driver->flags & HCD_USB2) { 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 514fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 51871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 51971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 52071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 52171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 559b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 560b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 561b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 562b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 563b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 564b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 565b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 566b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 568b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 569b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 570b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 584b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6007329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6017329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6027329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6037329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6047329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6057329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6067329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6109439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 611e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6129439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6139439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6149439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6159439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6169439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6179439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6184a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6199439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6209439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6219439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 628d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 629d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 630d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 632d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 633d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 635d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 636d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 637d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 638d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 639d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 640d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6421b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern if (unlikely(!hcd->rh_registered)) 6431b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 644d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 645d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 647d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 648d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 650d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 6519439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 652d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 653d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 654e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->poll_pending = 0; 655e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 656e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 657e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 6589439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 659e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6609439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6614a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 6629439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 663e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 664d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 665d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 666e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6679439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 670d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 67101cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 67201cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 67301cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 674d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 675d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 67601cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 678d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 681d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 682d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 683d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 684d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 685d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 686d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 688d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 690d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 69271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 694d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 695e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 696d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 697d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 698e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 699e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 701e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 702e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 703e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 705e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 706e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 707e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 708e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 709e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 710e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 711e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (hcd->poll_pending) 712e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 713e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 714e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 715d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 716d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7215e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 722d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7235e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 725d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 730455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 731455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 732d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 733e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 735455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 736e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7389439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 739e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 740e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 741e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 742e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7435e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 744455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 745d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 746d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 747d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 748455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 749d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 750d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 751e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7539439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7544a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 7559439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 7569439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 7579439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 758e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 7599439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 760e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7635234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7645234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7655234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 7665234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7675234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7685234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7695234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7705234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 7715234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7725234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7735234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7745234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7755234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7765234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7775234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7785234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7795234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 7805234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7815234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7825234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 7835234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7845234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 7855234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7865234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 7875234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 7885234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7895234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7905234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7915234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 7965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 7975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 7985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 7995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 859eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8624186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 864eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 866eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 868eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 869eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 8705a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 8734186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8753099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 877eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 878eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 880eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 881eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 882eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 883eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9034186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9054186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9073099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9138ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9168ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 917b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 918b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 919b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 921b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 924b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 937551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9404186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9427071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9497071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9514186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1004498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1006498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1013782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1024e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1025e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1026e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1027e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1028e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1029e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1030e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1031e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1032e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1033e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1034e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1035e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1036e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1037e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1038e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1039e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1043e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 104649367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10499f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10566840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10576840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10586840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10596840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10606840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1068eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 10739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1076e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 10779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 10789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1079e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1081e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1082e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1083e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1084e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1085e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1086e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1087e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1088e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1089e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1090e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1091e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1092e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1093e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1094e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1095e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1096e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1097e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1098e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1099e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1100e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1110e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1116eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1117e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1118eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11209a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 11219a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 11229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 11239a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 11249a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) && 11269a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern !is_root_hub(urb->dev)) { 11279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 11289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 11299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 11309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1132e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1134e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1136e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1137e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1138e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1139e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1140e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1141e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1142e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1143e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1144e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1145e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1146e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1149e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1151e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1153e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1155b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1156b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1157b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1158b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1159b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1160b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1161b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1162b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1163b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1164b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1165b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1166b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1167b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1168b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1169b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1170b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1171b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1172b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1173b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1174b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1175b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1176b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1177b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1178b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1179b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1180b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1181b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1182b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1183b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 12369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 12419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1242e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1243e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 1251b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1254b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1262b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1263b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1264b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1265b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1266b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret == 0 && urb->transfer_buffer_length != 0 1267b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1268b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 1273b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1274b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1275b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1276b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1277b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1278b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1279b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1280b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1281b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1282b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret && usb_endpoint_xfer_control(&urb->ep->desc) 1283b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 1284b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, 1285b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1286b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1287b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1288b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1289b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1291b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 12929a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12949a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12959a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1296b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1297b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1298b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1299b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return; 1300b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1301b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1302b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1303b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 13049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, urb->setup_dma, 13059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern sizeof(struct usb_ctrlrequest), 13069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern DMA_TO_DEVICE); 1307b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1308b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->setup_dma, 1309b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1310b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1311b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1312b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1313b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1314b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1315b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (urb->transfer_buffer_length != 0 1316b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1317b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 13189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, 13199a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_dma, 13209a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_buffer_length, 1321b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1322b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1323b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->transfer_dma, 1324b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1325b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1326b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 13279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 13289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 13299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 13319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 13339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 13349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 13359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 13369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 13389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 13399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 13409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 13419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 13439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 13449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 13459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 13479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 13484d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 13499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 13509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 13529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 13539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 13549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 13559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 13569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 13579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1358b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm status = map_urb_for_dma(hcd, urb, mem_flags); 1359b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (unlikely(status)) { 1360b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm usbmon_urb_submit_error(&hcd->self, urb, status); 1361b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm goto error; 1362b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1363b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1364e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (is_root_hub(urb->dev)) 1365e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1366e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else 1367e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 13689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 13719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 1372b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm error: 1373b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 13749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 13759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 13764d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 137749367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 13789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 13799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1391e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1395809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1396e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1402e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1413a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1416cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1417cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1419cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1420cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1421cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1422cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1423cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1424cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1425cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1426cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1427cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1428cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1429cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1430cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1431cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1432cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1433cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1434cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1438e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 14399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 14409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 144632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 144732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 144832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 144932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 14504a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 145132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 145232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 145332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 145432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 145532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 145632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 145732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1458eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 14594a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1460eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1461eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 146232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 14634a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 146432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1465b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1466eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 14674a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1468eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1469b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 14704a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 14714a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 147232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 14731f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern unmap_urb_for_dma(hcd, urb); 14744a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 14751f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 14761f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 147732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 14784a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 147932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 148032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 148149367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 148232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 148332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 148432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1485782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 148632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 148732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 148832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 148995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 149095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 149195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 149395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1494a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 149995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 150095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 15019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 15021720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 150495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 15059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1506ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 15085e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1510eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 15135e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1514809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1516e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1517e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1518e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1519e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1520e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1521e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1522e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1523e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1524e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1525e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1526e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1527e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1528e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1529e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1530e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1531e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1532e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1533e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1534e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1535e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1539ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 154495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1545455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1546809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1547455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1548455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1549455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1550455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1551455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1552455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1553455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1554455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1555809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1556455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1557455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1558455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1559455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1560455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1561455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 156479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp/* Check whether a new configuration or alt setting for an interface 156579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * will exceed the bandwidth for the bus (or the host controller resources). 156679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * Only pass in a non-NULL config or interface, not both! 156779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * Passing NULL for both new_config and new_intf means the device will be 156879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * de-configured by issuing a set configuration 0 command. 156979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 157079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpint usb_hcd_check_bandwidth(struct usb_device *udev, 157179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 157279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_interface *new_intf) 157379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 157479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 157579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_interface_cache *intf_cache; 157679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_interface *alt = 0; 157779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 157879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 157979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 158079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 158179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 158279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 158379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 158479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 158579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 158679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!new_config && !new_intf) { 158779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 158879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 158979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 159079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 159179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 159279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 159379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 159479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 159579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 159679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 159779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 159879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 159979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 160079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 160179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 160279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 160379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 160479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 160579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 160679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 160779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 160879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 160979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 161079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 161179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 161279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 161379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 161479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 161579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 161679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 161779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 161879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 161979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 162079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 162179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 162279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 162379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 162479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Dig the endpoints for alt setting 0 out of the 162579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * interface cache for this interface 162679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 162779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp intf_cache = new_config->intf_cache[i]; 162879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < intf_cache->num_altsetting; j++) { 162979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (intf_cache->altsetting[j].desc.bAlternateSetting == 0) 163079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp alt = &intf_cache->altsetting[j]; 163179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 163279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!alt) { 163379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp printk(KERN_DEBUG "Did not find alt setting 0 for intf %d\n", i); 163479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp continue; 163579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 163679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 163779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 163879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 163979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 164079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 164479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 164579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 164679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 164779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 164879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 164979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 165095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 165195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 165295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 165395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 165495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 165595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 165695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 165795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 165895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 165995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 166095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 166195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 166295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 166395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 166495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 166595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 166695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 166795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 166895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 16693444b26afa145148951112534f298bdc554ec789David Vrabel/** 16703444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 16713444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 16723444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 16733444b26afa145148951112534f298bdc554ec789David Vrabel * 16743444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 16753444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 16763444b26afa145148951112534f298bdc554ec789David Vrabel */ 16773444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 16783444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 16793444b26afa145148951112534f298bdc554ec789David Vrabel{ 16803444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 16813444b26afa145148951112534f298bdc554ec789David Vrabel 16823444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 16833444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 16843444b26afa145148951112534f298bdc554ec789David Vrabel else { 16853444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 16863444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 16873444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 16883444b26afa145148951112534f298bdc554ec789David Vrabel 16893444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 16903444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 16913444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 16923444b26afa145148951112534f298bdc554ec789David Vrabel } 16933444b26afa145148951112534f298bdc554ec789David Vrabel} 16943444b26afa145148951112534f298bdc554ec789David Vrabel 1695cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1696cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1697cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1698cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1699cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1700cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1701cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1702cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1703cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1704cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1705cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 170832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 170932aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 171032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 171132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 171232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 171332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 171432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 171532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 171632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 171732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 171832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 171932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 17209293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 172265bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1724686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1725686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1726686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1728686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 172965bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 1730686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1731686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1732686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1733686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1734686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1735686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1736686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1737686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 17389293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1739686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1740686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1741686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 17429293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1743686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 17449293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 174765bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1749686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1750686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1751cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1753686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 175465bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 17550c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 17569293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1757979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1758979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1759686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 17609293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1761686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1762686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1763686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1764686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1765686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1766686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1767686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 17689293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1769686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1770cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1771686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 17729293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1773cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1774cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 17759293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 17769293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17796b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 17806b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 17816b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 17826b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 17836b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 17846b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 17856b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 17861941044aa9632aa8debbb94a3c8a5ed0ebddade8Alan Stern usb_mark_last_busy(udev); 178765bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern usb_external_resume_device(udev, PMSG_REMOTE_RESUME); 17886b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 17896b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 17906b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 17976b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 17986b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 18066b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern queue_work(ksuspend_usb_wq, &hcd->wakeup_work); 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18099293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1848782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18627d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 1865de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 1866de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1868de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 1869de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 1870de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 1871de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 1872de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1874de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT || 1875de85422b94ddb23c021126815ea49414047c13dcStefan Becker !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) { 1876de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1877de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 1878de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1879de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 1880de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 18818de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1882de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 1883de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 1884de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 1885de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 1886de85422b94ddb23c021126815ea49414047c13dcStefan Becker 1887de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 1888de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 18891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 18951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 18961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 18981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 18991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1909d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 19361b26da1510c02a2dac33c0ea48904256dcec4617Greg Kroah-Hartman struct device *dev, const char *bus_name) 19371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19407b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 19431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 19461720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 19471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1951dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1954d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1955d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 19566b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 19576b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 19586b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 19591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 19611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 19621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 19641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1965782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19671720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 19681720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 19691720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 19701720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 19711720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 19721720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 19731720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 19741720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 19751720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 19761720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 19771720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 19781720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 19791720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 1980782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 19811720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19841720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 19851720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1987782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 19981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 20001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20028ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 20038ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 20088de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 20098de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2010b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2011b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2012b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2013b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 20141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 20151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 20208ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2022b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2023b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2024b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2025b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2026b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 20276b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 20286b403b020c1f42180b14d28d832da61167cff822Sarah Sharp switch (hcd->driver->flags & HCD_MASK) { 20296b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 20306b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 20316b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20326b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 20336b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 20346b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20356b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 20366b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 20376b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20386b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 20396b403b020c1f42180b14d28d832da61167cff822Sarah Sharp goto err_allocate_root_hub; 20406b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2041b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 2042b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2043db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2044db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2045db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2046db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2047db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 2048db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 2049b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2050b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2051b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2052b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2053b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2054b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2055b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 2056b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2057fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2058fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2059fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2060b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2061b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2062b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 2064de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2065de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work as advertised when used together 2066de85422b94ddb23c021126815ea49414047c13dcStefan Becker * with IRQF_SHARED. As usb_hcd_irq() will always disable 2067de85422b94ddb23c021126815ea49414047c13dcStefan Becker * interrupts we can remove it here. 2068de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 206983a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand if (irqflags & IRQF_SHARED) 207083a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand irqflags &= ~IRQF_DISABLED; 2071de85422b94ddb23c021126815ea49414047c13dcStefan Becker 20721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 2077c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 20788ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 20791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 2081c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 20968ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2099b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 210055c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2101b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 21028ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 21038ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 21045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 21055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 21065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 21075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 21085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 21095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2110d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 2111d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 21155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 21165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_disconnect(&hcd->self.root_hub); 21175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2118b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 21198ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 2120b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 21211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 21221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2123b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2124b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 2125b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 2126b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 2127b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 21281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2129b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 21301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 21311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2133782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 21521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 21549ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 21556b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 2156d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 21576b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 21586b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 21595234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); 21604186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 21624186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21671b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern hcd->poll_rh = 0; 21681b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 21691b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 21701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 21711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2175782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 217764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 217864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 217964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 218064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 218164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 218264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 218364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 218464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2185782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 218664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2189f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 22171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 22181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 22191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 22221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 22241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2225f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2226