hcd.c revision b214f191d95ba4b5a35aebd69cd129cf7e3b1884
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> 4327729aadd31dafddaaf64c24f8ef6d0ff750f3aaEric Lescouet#include <linux/usb/hcd.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 839beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 849beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 859beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 869beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 994186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 105809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 106809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 108cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 109cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 114809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 115809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 130d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 131d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 142cd780694920fbf869b23c8afb0bd083e7b0448c7Alan Stern 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ 143d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1597329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16016f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 162667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 163667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18316f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 185667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 186667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29088fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 296d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 297d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 30022c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x1f, 0x00, /* __le16 wTotalLength; */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 33022c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 33122c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 33222c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp /* one SuperSpeed endpoint companion descriptor */ 33322c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x06, /* __u8 ss_bLength */ 33422c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ 33522c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ 33622c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ 33722c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ 338d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 339d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 342392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 343392ca68b401e0797115a08836642faad5778fdb2George Spelvin * ascii2desc() - Helper routine for producing UTF-16LE string descriptors 344392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @s: Null-terminated ASCII (actually ISO-8859-1) string 345392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @buf: Buffer for USB string descriptor (header + UTF-16LE) 346392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: Length (in bytes; may be odd) of descriptor buffer. 347392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 348392ca68b401e0797115a08836642faad5778fdb2George Spelvin * The return value is the number of bytes filled in: 2 + 2*strlen(s) or 349392ca68b401e0797115a08836642faad5778fdb2George Spelvin * buflen, whichever is less. 350392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 351392ca68b401e0797115a08836642faad5778fdb2George Spelvin * USB String descriptors can contain at most 126 characters; input 352392ca68b401e0797115a08836642faad5778fdb2George Spelvin * strings longer than that are truncated. 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 354392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 355392ca68b401e0797115a08836642faad5778fdb2George Spelvinascii2desc(char const *s, u8 *buf, unsigned len) 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 357392ca68b401e0797115a08836642faad5778fdb2George Spelvin unsigned n, t = 2 + 2*strlen(s); 358392ca68b401e0797115a08836642faad5778fdb2George Spelvin 359392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (t > 254) 360392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = 254; /* Longest possible UTF string descriptor */ 361392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > t) 362392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = t; 363392ca68b401e0797115a08836642faad5778fdb2George Spelvin 364392ca68b401e0797115a08836642faad5778fdb2George Spelvin t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ 365392ca68b401e0797115a08836642faad5778fdb2George Spelvin 366392ca68b401e0797115a08836642faad5778fdb2George Spelvin n = len; 367392ca68b401e0797115a08836642faad5778fdb2George Spelvin while (n--) { 368392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t; 369392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (!n--) 370392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 371392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t >> 8; 372392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = (unsigned char)*s++; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 374392ca68b401e0797115a08836642faad5778fdb2George Spelvin return len; 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 377392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 378392ca68b401e0797115a08836642faad5778fdb2George Spelvin * rh_string() - provides string descriptors for root hub 379392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 381392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @data: buffer for output packet 382392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: length of the provided buffer 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 386392ca68b401e0797115a08836642faad5778fdb2George Spelvin * Returns the number of bytes filled in: the length of the descriptor or 387392ca68b401e0797115a08836642faad5778fdb2George Spelvin * of the provided buffer, whichever is less. 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 389392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 390392ca68b401e0797115a08836642faad5778fdb2George Spelvinrh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) 39171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 392392ca68b401e0797115a08836642faad5778fdb2George Spelvin char buf[100]; 393392ca68b401e0797115a08836642faad5778fdb2George Spelvin char const *s; 394392ca68b401e0797115a08836642faad5778fdb2George Spelvin static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 397392ca68b401e0797115a08836642faad5778fdb2George Spelvin switch (id) { 398392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 0: 399392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ 400392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ 401392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > 4) 402392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = 4; 403392ca68b401e0797115a08836642faad5778fdb2George Spelvin memcpy(data, langids, len); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 405392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 1: 406392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Serial number */ 407392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->self.bus_name; 408392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 409392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 2: 410392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Product name */ 411392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->product_desc; 412392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 413392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 3: 414392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Manufacturer */ 41596b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 41696b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 417392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = buf; 418392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 420392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Can't happen; caller guarantees it */ 421392ca68b401e0797115a08836642faad5778fdb2George Spelvin return 0; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 423392ca68b401e0797115a08836642faad5778fdb2George Spelvin 424392ca68b401e0797115a08836642faad5778fdb2George Spelvin return ascii2desc(s, data, len); 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 43454bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 43554bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 43771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 438e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4397329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4407329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 444e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 445e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 446e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 447e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 448e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 449b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 450e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 465fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 466fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 467fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 468fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 469fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 470fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 471fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 472fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 473fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 474fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 475fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 476fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 477fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 478fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 479fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 480fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 482fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 483fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 490fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 495fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 496fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 497fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 51083de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp switch (hcd->speed) { 5117dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 512d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 5137dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5147dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 5167dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5177dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 5197dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5207dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5227dd19e69d131ea34f74397559b422511e54d2911Viral Mehta } 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5247329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5257329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 52883de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp switch (hcd->speed) { 5297dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 530d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 531d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 5327dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5337dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5367dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5377dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5407dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5417dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5427dd19e69d131ea34f74397559b422511e54d2911Viral Mehta goto error; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 544fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 54871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 54971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 55071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 55171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 589b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 590b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 591b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 592b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 593b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 594b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 595b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 596b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 598b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 599b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 600b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 614b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6307329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6317329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6327329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6337329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6347329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6357329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6367329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 641e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6449439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6459439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6469439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6479439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6484a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6499439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6509439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6519439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 659d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 660d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 662d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 663d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 665d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 666d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 667d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 668d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 669d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 670ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches char buffer[6]; /* Any root hubs with > 31 ports? */ 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6726d88e6792574497bfac9a81403cc47712040636fAlan Stern if (unlikely(!hcd->rh_pollable)) 6731b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 674d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 675d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 677d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 678d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 680d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 6819439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 682d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 683d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 684541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 685e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 686e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 687e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 6889439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 689e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6909439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6914a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 6929439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 693e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 694d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 695541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 696e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6979439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 700d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 70101cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 70201cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 70325985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * fire at the same time to give the CPU a break in between */ 704541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : 705d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 70601cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 708d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 711d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 712d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 713d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 714d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 715d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 716d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 718d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 720d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 72271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 724d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 725e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 726d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 727d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 728e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 729e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 732e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 733e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 735e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 736e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 737e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 738e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 739e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 740e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 741541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern else if (HCD_POLL_PENDING(hcd)) 742e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 743e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 744e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 745d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 746d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7515e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 752d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7535e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 755d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 760455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 761455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 762d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 763e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 765455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 766e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7689439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 769e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 770e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 771e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 772e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7735e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 774455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 775d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 776d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 777d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 778455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 779d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 780d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 781e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7839439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7844a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 7859439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 7869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 7879439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 788e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 7899439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 790e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 7965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 8015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 8105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 8135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 8155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 8175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 8265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 8275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 8285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 8295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8505234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8515234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8525234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 889eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8924186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 894eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 896eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 898eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 899eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 9005a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 9034186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9053099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 907eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 908eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 910eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 911eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 912eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 913eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9334186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9373099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9438ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9468ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 947b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 948b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 949b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 951b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 954b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9654186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 967551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9704186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9727071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9797071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9814186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9899b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd) || hcd->state == HC_STATE_HALT) 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1034498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1036498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1043782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1057e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1058e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1059e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1060e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1061e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1062e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1063e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1064e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1065e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1066e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1067e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1068e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1069e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1073e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 107649367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10799f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10866840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10876840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10886840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10896840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10906840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10929a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10959b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_RH_RUNNING(hcd)) { 1096eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10979a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10989b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } else { 10999a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 11009a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1103e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 11059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1106e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 11079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1108e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1109e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1110e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1112e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1113e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1114e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1115e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1116e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1117e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1118e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1119e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1120e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1121e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1122e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1123e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1124e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1125e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1126e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1127e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1137e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1138e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1143eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1144e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1145eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 11489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 11499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 11519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1152541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (!HCD_SAW_IRQ(hcd) && !is_root_hub(urb->dev)) { 11539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 11559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 1156ff9d78b36f76687c91c67b9f4c5c33bc888ed2f9Sarah Sharp if (hcd->shared_hcd) 1157ff9d78b36f76687c91c67b9f4c5c33bc888ed2f9Sarah Sharp set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags); 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1160e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1162e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1164e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1165e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1166e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1167e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1168e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1169e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1170e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1171e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1172e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1173e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1174e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1177e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1179e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1181e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1183b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12224307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi if (*vaddr_handle == NULL) { 12234307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi WARN_ON_ONCE(1); 12244307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi return -EFAULT; 12254307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi } 12264307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1236b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1251b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1252b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1253b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1254b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1255b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1262b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1263b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1264b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1265b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1266b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1267c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morellvoid usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) 1268ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern{ 1269ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) 1270ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1271ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->setup_dma, 1272ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1273ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1274ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) 1275ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1276ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->setup_dma, 1277ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern (void **) &urb->setup_packet, 1278ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1279ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1280ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 12811dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey /* Make it safe to call this routine more than once */ 12821dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); 12831dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey} 1284c8cf203a1d228fa001b95534f639ffb7a23d5386Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); 12851dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 12862694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morellstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12872694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell{ 12882694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell if (hcd->driver->unmap_urb_for_dma) 12892694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell hcd->driver->unmap_urb_for_dma(hcd, urb); 12902694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell else 12912694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell usb_hcd_unmap_urb_for_dma(hcd, urb); 12922694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell} 12932694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell 1294c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morellvoid usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12951dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey{ 12961dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey enum dma_data_direction dir; 12971dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 1298c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morell usb_hcd_unmap_urb_setup_for_dma(hcd, urb); 12991dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 1300ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1301ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_DMA_MAP_SG) 1302ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_sg(hcd->self.controller, 1303910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1304ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1305ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1306ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_PAGE) 1307ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_page(hcd->self.controller, 1308ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1309ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1310ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1311ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) 1312ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1313ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1314ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1315ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1316ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_MAP_LOCAL) 1317ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1318ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_dma, 1319ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_buffer, 1320ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1321ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1322ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1323ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern /* Make it safe to call this routine more than once */ 13241dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | 1325ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); 1326ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern} 1327c8cf203a1d228fa001b95534f639ffb7a23d5386Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); 1328ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1329b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1330b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 13319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 13322694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell if (hcd->driver->map_urb_for_dma) 13332694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); 13342694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell else 13352694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); 13362694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell} 13372694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell 13382694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morellint usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 13392694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell gfp_t mem_flags) 13402694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell{ 1341b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1342b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1343b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 13449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 13459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1346e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1347e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1349b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 135085bcb5ee889e0ebb9154718939e049de265fcdfbAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) { 135107a8cdd2bb17a4da68136d963b8bc71959bd31a5Anand Gadiyar if (hcd->self.uses_pio_for_control) 135207a8cdd2bb17a4da68136d963b8bc71959bd31a5Anand Gadiyar return ret; 135385e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1354b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1357b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 135985e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (dma_mapping_error(hcd->self.controller, 136085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->setup_dma)) 136185e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger return -EAGAIN; 1362ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_SINGLE; 1363f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1364b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1365b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1366b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1367b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1368b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1369b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1370ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret) 1371ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern return ret; 1372ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_LOCAL; 1373f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } 1374b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1375b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1376b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1377ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_buffer_length != 0 1378b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 137985e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1380ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->num_sgs) { 1381ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern int n = dma_map_sg( 1382ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1383910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1384ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1385ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1386ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n <= 0) 1387ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1388ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1389ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SG; 1390ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n != urb->num_sgs) { 1391ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs = n; 1392ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= 1393ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_SG_COMBINED; 1394ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1395ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else if (urb->sg) { 1396910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox struct scatterlist *sg = urb->sg; 1397ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_page( 1398ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1399ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg_page(sg), 1400ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg->offset, 1401ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1402ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1403ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 140485e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->transfer_dma)) 1405ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1406ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1407ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_PAGE; 1408ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1409ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_single( 1410ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1411ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer, 1412ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1413ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1414ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 1415ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma)) 1416ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1417ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1418ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SINGLE; 1419ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 142085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1421b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1422b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1423b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1424b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1425b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1426b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1427ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret == 0) 1428ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_MAP_LOCAL; 1429b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1430ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | 1431ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_SETUP_MAP_LOCAL))) 1432c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morell usb_hcd_unmap_urb_for_dma(hcd, urb); 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1434b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 14359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 14362694a48d9007a8bdf1731c1b97d4942c9cc49296Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 14399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 14419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 14429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 14439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 14449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 14469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 14479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 14489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 14499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 14519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 14529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 14539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 14559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 14564d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 14579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 14589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 14609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 14619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 14629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 14639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 14649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 14659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1466b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1467ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (is_root_hub(urb->dev)) { 1468e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1469ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1470ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = map_urb_for_dma(hcd, urb, mem_flags); 1471ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (likely(status == 0)) { 1472ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 1473ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (unlikely(status)) 14742694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell unmap_urb_for_dma(hcd, urb); 1475ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1476ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 14779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 1480b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 14819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 14829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 14834d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 148449367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 14859a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 14869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1498e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1502809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1503e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1509e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1520a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1523cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1524cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1526cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1527cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1528cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1529cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1530cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1531cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1532cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1533cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1534cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1535cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1536cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1537cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1538cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1539cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1540cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1541cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1545e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 15469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 15479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 155332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 155432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 155532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 155632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 15574a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 155832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 155932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 156032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 156132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 156232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 156332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 156432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1565eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 15664a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1567eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1568eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 156932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 15704a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 157132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1572b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1573eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 15744a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1575eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1576b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 15774a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 15784a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 157932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 15802694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell unmap_urb_for_dma(hcd, urb); 15814a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 15821f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 15831f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 158432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 15854a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 158632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 158732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 158849367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 158932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 159032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 159132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1592782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 159332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 159432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 159532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 159695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 159795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 159895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 160095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1601a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 160695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 160795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 16089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 16091720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 161195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 16129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1613ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 16155e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1617eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 16205e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1621809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1623e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1624e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1625e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1626e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1627e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1628e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1629e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1630e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1631e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1632e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1633e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1634e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1635e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1636e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1637e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1638e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1639e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1640e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1641e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1642e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1646ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 165195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1652455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1653809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1654455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1655455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1656455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1657455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1658455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1659455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1660455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1661455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1662809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1663455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1664455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1665455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1666455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1667455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1668455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16713f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp/** 167270445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds 167370445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * the bus bandwidth 167470445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * @udev: target &usb_device 16753f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_config: new configuration to install 16763f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @cur_alt: the current alternate interface setting 16773f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_alt: alternate interface setting that is being installed 16783f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16793f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change configurations, pass in the new configuration in new_config, 16803f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass NULL for cur_alt and new_alt. 16813f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16823f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To reset a device's configuration (put the device in the ADDRESSED state), 16833f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in NULL for new_config, cur_alt, and new_alt. 16843f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16853f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change alternate interface settings, pass in NULL for new_config, 16863f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in the current alternate interface setting in cur_alt, 16873f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass in the new alternate interface setting in new_alt. 16883f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16893f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * Returns an error if the requested bandwidth change exceeds the 16903f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * bus bandwidth or host controller internal resources. 169179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 16923f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharpint usb_hcd_alloc_bandwidth(struct usb_device *udev, 169379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 16943f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *cur_alt, 16953f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *new_alt) 169679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 169779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 1698576a362ad2103da481e1f6e13de01f33d3d4c7b1H Hartley Sweeten struct usb_host_interface *alt = NULL; 169979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 170079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 170179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 170279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 170379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 170479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 170579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 170679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 170779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 17083f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!new_config && !cur_alt) { 170979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 171079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 171179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 171279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 171379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 171479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 171579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 171679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 171779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 171879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 171979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 172079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 172179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 172279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 172379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 172479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 172579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 172679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 172779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 172879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 172979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 173079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 173179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 173279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 173379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 173479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 173579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 173679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 173779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 173879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 173979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 174079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 174179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 174279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 174379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 174479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 1745d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp struct usb_host_interface *first_alt; 1746d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp int iface_num; 1747d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp 1748d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp first_alt = &new_config->intf_cache[i]->altsetting[0]; 1749d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp iface_num = first_alt->desc.bInterfaceNumber; 175091017f9cf5fcfb601b8d583c896ac7de7d200c57Sarah Sharp /* Set up endpoints for alternate interface setting 0 */ 1751d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = usb_find_alt_setting(new_config, iface_num, 0); 17523f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!alt) 17533f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* No alt setting 0? Pick the first setting. */ 1754d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = first_alt; 17553f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp 175679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 175779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 175879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 175979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 176079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 176179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 176279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 17633f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (cur_alt && new_alt) { 176404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp struct usb_interface *iface = usb_ifnum_to_if(udev, 176504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt->desc.bInterfaceNumber); 176604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 176704a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (iface->resetting_device) { 176804a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp /* 176904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * The USB core just reset the device, so the xHCI host 177004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * and the device will think alt setting 0 is installed. 177104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * However, the USB core will pass in the alternate 177204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting installed before the reset as cur_alt. Dig 177304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * out the alternate setting 0 structure, or the first 177404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * alternate setting if a broken device doesn't have alt 177504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting 0. 177604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp */ 177704a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = usb_altnum_to_altsetting(iface, 0); 177804a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (!cur_alt) 177904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = &iface->altsetting[0]; 178004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp } 178104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 17823f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Drop all the endpoints in the current alt setting */ 17833f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { 17843f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, 17853f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &cur_alt->endpoint[i]); 17863f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17873f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17883f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17893f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Add all the endpoints in the new alt setting */ 17903f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { 17913f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, 17923f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &new_alt->endpoint[i]); 17933f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17943f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17953f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17963f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 179779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 179879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 179979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 180079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 180179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 180279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 180379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 180495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 180595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 180695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 180795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 180895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 180995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 181095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 181195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 181295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 181395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 181495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 181595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 181695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 181795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 181895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 181995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 182095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 182195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 182295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 18233444b26afa145148951112534f298bdc554ec789David Vrabel/** 18243444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 18253444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 18263444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 18273444b26afa145148951112534f298bdc554ec789David Vrabel * 18283444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 18293444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 18303444b26afa145148951112534f298bdc554ec789David Vrabel */ 18313444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 18323444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 18333444b26afa145148951112534f298bdc554ec789David Vrabel{ 18343444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 18353444b26afa145148951112534f298bdc554ec789David Vrabel 18363444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 18373444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 18383444b26afa145148951112534f298bdc554ec789David Vrabel else { 18393444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 18403444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 18413444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 18423444b26afa145148951112534f298bdc554ec789David Vrabel 18433444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 18443444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 18453444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 18463444b26afa145148951112534f298bdc554ec789David Vrabel } 18473444b26afa145148951112534f298bdc554ec789David Vrabel} 18483444b26afa145148951112534f298bdc554ec789David Vrabel 1849eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1850eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_alloc_streams - allocate bulk endpoint stream IDs. 1851eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1852eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints that need streams. 1853eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1854eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_streams: number of streams to allocate. 1855eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1856eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1857eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Sets up a group of bulk endpoints to have num_streams stream IDs available. 1858eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Drivers may queue multiple transfers to different stream IDs, which may 1859eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * complete in a different order than they were queued. 1860eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1861eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpint usb_alloc_streams(struct usb_interface *interface, 1862eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1863eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp unsigned int num_streams, gfp_t mem_flags) 1864eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1865eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1866eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1867eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1868eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1869eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1870eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1871eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) 1872eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1873eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1874eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1875eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1876eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1877eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1878eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) 1879eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1880eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1881eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, 1882eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp num_streams, mem_flags); 1883eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1884eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_alloc_streams); 1885eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1886eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1887eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_free_streams - free bulk endpoint stream IDs. 1888eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1889eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints to remove streams from. 1890eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1891eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1892eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1893eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Reverts a group of bulk endpoints back to not using stream IDs. 1894eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Can fail if we are given bad arguments, or HCD is broken. 1895eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1896eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpvoid usb_free_streams(struct usb_interface *interface, 1897eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1898eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp gfp_t mem_flags) 1899eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1900eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1901eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1902eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1903eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1904eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1905eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1906eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1907eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1908eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1909eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1910eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1911b214f191d95ba4b5a35aebd69cd129cf7e3b1884Matthew Wilcox if (!eps[i] || !usb_endpoint_xfer_bulk(&eps[i]->desc)) 1912eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1913eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1914eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); 1915eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1916eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_free_streams); 1917eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1918cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1919cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1920cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1921cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1922cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1923cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1924cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1925cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1926cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1927cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1928cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 193132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 193232aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 193332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 193432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 193532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19369b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_RH_RUNNING(hcd)) 193732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 193832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 193932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 194032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 194132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 194232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19439293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 194565bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 19461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1947686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1948686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1949686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 195265bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 19539b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd)) { 19549b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); 19559b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern return 0; 19569b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19579b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern 1958686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1959686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1960686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 19619b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 1962686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1963686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1964686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1965686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1966686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 19679293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1968686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 19699b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_lock_irq(&hcd_root_hub_lock); 19709b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_DEAD(hcd)) { 19719b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 19729b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern hcd->state = old_state; 19739b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19749b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_unlock_irq(&hcd_root_hub_lock); 1975686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 19769293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1977686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 19789293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 19791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 198165bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1983686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1984686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1985cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1987686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 198865bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 19899b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd)) { 19909b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); 19919b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern return 0; 19929b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19930c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 19949293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 19959b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_RH_RUNNING(hcd)) 1996979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1997686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 19989293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1999686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 2000bf3d7d40e42a85ca73a34e1385ff34f092a384ebAlan Stern clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 2001686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 2002686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 2003686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 20049b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_lock_irq(&hcd_root_hub_lock); 20059b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_DEAD(hcd)) { 20069b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern usb_set_device_state(rhdev, rhdev->actconfig 20079b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern ? USB_STATE_CONFIGURED 20089b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern : USB_STATE_ADDRESS); 20099b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 20109b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern hcd->state = HC_STATE_RUNNING; 20119b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 20129b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_unlock_irq(&hcd_root_hub_lock); 2013686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 2014cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 2015686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 20169293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 2017cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 2018cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 20199293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 20209293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20239bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_PM */ 20249bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 20259bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 20269bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 20276b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 20286b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 20296b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 20306b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 20316b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 20326b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 20336b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 20340534d46848990e8eed7cd0832d745d813e827261Alan Stern usb_remote_wakeup(udev); 20356b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 20366b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 20376b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 20401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 20446b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 20456b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 2052ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern if (hcd->rh_registered) { 2053ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 20549bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern queue_work(pm_wq, &hcd->wakeup_work); 2055ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern } 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20589293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20609bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_USB_SUSPEND */ 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 20681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 20691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 20701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 20711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 20781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 20801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2097782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 21101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21117d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 2114de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 2115de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 21161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2117de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 2118de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 2119de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 2120de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 2121de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 21221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21239b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) { 2124de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2125de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 2126de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2127de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 2128de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 2129ff9d78b36f76687c91c67b9f4c5c33bc888ed2f9Sarah Sharp if (hcd->shared_hcd) 2130ff9d78b36f76687c91c67b9f4c5c33bc888ed2f9Sarah Sharp set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags); 21318de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2132de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 2133de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 2134de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 2135de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 2136de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2137de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 2138de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 214043b86af83da7db8b2c6d85ca970203950e5bad88Dong NguyenEXPORT_SYMBOL_GPL(usb_hcd_irq); 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 2150c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * by the PCI glue, so only glue for non-PCI busses should need to call it. 2151c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2152c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Only call this function with the primary HCD. 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 21619b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 21629b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_DEAD, &hcd->flags); 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 2164541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 21671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 21681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 21691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 21701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2171c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { 2172c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd = hcd->shared_hcd; 2173c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (hcd->rh_registered) { 2174c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 2175c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp 2176c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp /* make khubd clean up old urbs and devices */ 2177c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp usb_set_device_state(hcd->self.root_hub, 2178c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp USB_STATE_NOTATTACHED); 2179c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp usb_kick_khubd(hcd->self.root_hub); 2180c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 2181c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 2183c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp /* Make sure that the other roothub is also deallocated. */ 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 21861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2190c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * usb_create_shared_hcd - create and initialize an HCD structure 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 2194c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @primary_hcd: a pointer to the usb_hcd structure that is sharing the 2195c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * PCI device. Only allocate certain resources for the primary HCD 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 21971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2204c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharpstruct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, 2205c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp struct device *dev, const char *bus_name, 2206c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp struct usb_hcd *primary_hcd) 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22107b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2215c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (primary_hcd == NULL) { 2216c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), 2217c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp GFP_KERNEL); 2218c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (!hcd->bandwidth_mutex) { 2219c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp kfree(hcd); 2220c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); 2221c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return NULL; 2222c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 2223c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp mutex_init(hcd->bandwidth_mutex); 2224c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp dev_set_drvdata(dev, hcd); 2225c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } else { 2226c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; 2227c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->primary_hcd = primary_hcd; 2228c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp primary_hcd->primary_hcd = primary_hcd; 2229c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->shared_hcd = primary_hcd; 2230c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp primary_hcd->shared_hcd = hcd; 2231d673bfcbfffdeb56064a6b1ee047b85590bed76cSarah Sharp } 2232d673bfcbfffdeb56064a6b1ee047b85590bed76cSarah Sharp 22331720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 22341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 22361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 22371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 2238dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 22391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 2241d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 2242d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 22439bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 22446b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 22456b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 22461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 224883de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp hcd->speed = driver->flags & HCD_MASK; 22491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 22501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 22511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2253c56354378426e550aaf6ddf3983f502a8fddeab5Sarah SharpEXPORT_SYMBOL_GPL(usb_create_shared_hcd); 2254c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp 2255c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp/** 2256c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * usb_create_hcd - create and initialize an HCD structure 2257c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @driver: HC driver that will use this hcd 2258c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @dev: device for this HC, stored in hcd->self.controller 2259c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @bus_name: value to store in hcd->self.bus_name 2260c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Context: !in_interrupt() 2261c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2262c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Allocate a struct usb_hcd, with extra space at the end for the 2263c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * HC driver's private data. Initialize the generic members of the 2264c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * hcd structure. 2265c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2266c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * If memory is unavailable, returns NULL. 2267c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp */ 2268c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharpstruct usb_hcd *usb_create_hcd(const struct hc_driver *driver, 2269c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp struct device *dev, const char *bus_name) 2270c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp{ 2271c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return usb_create_shared_hcd(driver, dev, bus_name, NULL); 2272c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp} 2273782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 22741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2275c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp/* 2276c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Roothubs that share one PCI device must also share the bandwidth mutex. 2277c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is 2278c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * deallocated. 2279c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2280c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Make sure to only deallocate the bandwidth_mutex when the primary HCD is 2281c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * freed. When hcd_release() is called for the non-primary HCD, set the 2282c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * primary_hcd's shared_hcd pointer to null (since the non-primary HCD will be 2283c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * freed shortly). 2284c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp */ 22851720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 22861720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 22871720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 22881720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 2289c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd)) 2290c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp kfree(hcd->bandwidth_mutex); 2291c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp else 2292c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->shared_hcd->shared_hcd = NULL; 22931720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 22941720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 22951720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 22961720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 22971720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 22981720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 22991720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 23001720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 23011720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 2302782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 23031720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 23041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 23051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23061720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 23071720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 23081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2309782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 23101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2311c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharpint usb_hcd_is_primary_hcd(struct usb_hcd *hcd) 2312c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp{ 2313c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (!hcd->primary_hcd) 2314c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return 1; 2315c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return hcd == hcd->primary_hcd; 2316c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp} 2317c56354378426e550aaf6ddf3983f502a8fddeab5Sarah SharpEXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); 2318c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp 231923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharpstatic int usb_hcd_request_irqs(struct usb_hcd *hcd, 232023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp unsigned int irqnum, unsigned long irqflags) 232123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp{ 232223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp int retval; 232323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 232423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (hcd->driver->irq) { 232523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 232623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp /* IRQF_DISABLED doesn't work as advertised when used together 232723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp * with IRQF_SHARED. As usb_hcd_irq() will always disable 232823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp * interrupts we can remove it here. 232923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp */ 233023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (irqflags & IRQF_SHARED) 233123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp irqflags &= ~IRQF_DISABLED; 233223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 233323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 233423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->driver->description, hcd->self.busnum); 233523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 233623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->irq_descr, hcd); 233723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (retval != 0) { 233823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp dev_err(hcd->self.controller, 233923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp "request interrupt %d failed\n", 234023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp irqnum); 234123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp return retval; 234223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp } 234323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->irq = irqnum; 234423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 234523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (hcd->driver->flags & HCD_MEMORY) ? 234623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp "io mem" : "io base", 234723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (unsigned long long)hcd->rsrc_start); 234823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp } else { 234923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->irq = -1; 235023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (hcd->rsrc_start) 235123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp dev_info(hcd->self.controller, "%s 0x%08llx\n", 235223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (hcd->driver->flags & HCD_MEMORY) ? 235323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp "io mem" : "io base", 235423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (unsigned long long)hcd->rsrc_start); 235523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp } 235623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp return 0; 235723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp} 235823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 23591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 23601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 23611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 23621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 23631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 23641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 23651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 23661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 23671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 23681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 23691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 23701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 23711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23728ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 23738ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 23741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 23761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23775234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 23788de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 23798de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2380b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2381b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2382b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2383b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 23841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 23851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 23861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 23871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 23908ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 23911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2392b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2393b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2394b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2395b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2396b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 23976d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->self.root_hub = rhdev; 23986b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 239983de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp switch (hcd->speed) { 24006b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 24016b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 24026b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 24036b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 24046b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 24056b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 24066b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 24076b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 24086b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 24096b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 241096e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern goto err_set_rh_speed; 24116b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2412b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2413db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2414db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2415db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2416db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2417db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 2418db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 24199b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is 24209b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern * registered. But since the controller can die at any time, 24219b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern * let's initialize the flag before touching the hardware. 24229b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern */ 24239b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 24249b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern 2425b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2426b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2427b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2428b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2429b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2430b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2431b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 24326d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 1; 2433b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2434fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2435fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2436fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2437b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2438b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2439b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 2440c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd)) { 2441c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); 2442c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (retval) 2443c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp goto err_request_irq; 2444c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 24451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24464814030ce11f08350b7a91573487ad4b600dae34Sarah Sharp hcd->state = HC_STATE_RUNNING; 2447abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp retval = hcd->driver->start(hcd); 2448abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp if (retval < 0) { 24491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 24508ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 24511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2453b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 245455c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2455b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 24568ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 24578ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 24585234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 24595234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 24605234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 24615234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 24625234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 24635234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2464541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) 2465d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 24661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 24671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24685234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 24699b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 247096e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern if (HC_IS_RUNNING(hcd->state)) 247196e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_QUIESCING; 247296e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_lock_irq(&hcd_root_hub_lock); 247396e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->rh_registered = 0; 247496e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 247596e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 247696e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#ifdef CONFIG_USB_SUSPEND 247796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern cancel_work_sync(&hcd->wakeup_work); 247896e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#endif 24795234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 24806d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 24815234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2482b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 24836d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2484541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 24856d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 24868ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 248796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_HALT; 2488541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 248996e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern del_timer_sync(&hcd->rh_timer); 2490b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 2491c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd) && hcd->irq >= 0) 24921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2493b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2494b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 249596e077ae347912dfce0e93f5958efc3ed6f311f4Alan Sternerr_set_rh_speed: 24966d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 2497b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 24981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2499b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 25001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 25011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 25021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2503782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 25041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 25061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 25071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 25081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 25091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 25101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 25111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 25121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 25131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 25141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25156d88e6792574497bfac9a81403cc47712040636fAlan Stern struct usb_device *rhdev = hcd->self.root_hub; 25166d88e6792574497bfac9a81403cc47712040636fAlan Stern 25171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 25181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25196d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_get_dev(rhdev); 25206d88e6792574497bfac9a81403cc47712040636fAlan Stern sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); 252196e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 25229b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 25231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 25241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 25251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 25271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 25281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 25291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 25309ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 25319bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 2532d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 25336b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 25346b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 25354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 25366d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 25374186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 25381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25396d88e6792574497bfac9a81403cc47712040636fAlan Stern /* Prevent any more root-hub status calls from the timer. 25406d88e6792574497bfac9a81403cc47712040636fAlan Stern * The HCD might still restart the timer (if a port status change 25416d88e6792574497bfac9a81403cc47712040636fAlan Stern * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke 25426d88e6792574497bfac9a81403cc47712040636fAlan Stern * the hub_status_data() callback. 25436d88e6792574497bfac9a81403cc47712040636fAlan Stern */ 25446d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2545541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 25466d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 25476d88e6792574497bfac9a81403cc47712040636fAlan Stern 25481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 25491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 25501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25516d88e6792574497bfac9a81403cc47712040636fAlan Stern /* In case the HCD restarted the timer, stop it again. */ 2552541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 25531b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 25541b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 2555c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd)) { 2556c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (hcd->irq >= 0) 2557c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp free_irq(hcd->irq, hcd); 2558c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 25596d88e6792574497bfac9a81403cc47712040636fAlan Stern 25606d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 25611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 25621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 25631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2564782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 25651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 256664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 256764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 256864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 256964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 257064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 257164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 257264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 257364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2574782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 257564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 25761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 25771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2578f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 25791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 25811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 25831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 25841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 25851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 25861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 25871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 25881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 25891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 25911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 25941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 25951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 25971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 25981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 25991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 26001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 26011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 26031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 26061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 26071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 26081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 26101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 26111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 26121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 26131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2614f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2615