hcd.c revision ff2f07874362d34684296f2bd5547a099f33c6d4
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> 419bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#include <linux/pm_runtime.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 4427729aadd31dafddaaf64c24f8ef6d0ff750f3aaEric Lescouet#include <linux/usb/hcd.h> 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 849beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 859beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 869beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 879beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 1004186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 106809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 107809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 109cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 111cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 115809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 119809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 131d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 142d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 143cd780694920fbf869b23c8afb0bd083e7b0448c7Alan Stern 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 151d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1607329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16116f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 163667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 164667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18416f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 186667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 187667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29388fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 297d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 300d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x19, 0x00, /* __le16 wTotalLength; FIXME */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 330d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 331d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 332d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* 333d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * All 3.0 hubs should have an endpoint companion descriptor, 334d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * but we're ignoring that for now. FIXME? 335d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp */ 336d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 337d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 340392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 341392ca68b401e0797115a08836642faad5778fdb2George Spelvin * ascii2desc() - Helper routine for producing UTF-16LE string descriptors 342392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @s: Null-terminated ASCII (actually ISO-8859-1) string 343392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @buf: Buffer for USB string descriptor (header + UTF-16LE) 344392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: Length (in bytes; may be odd) of descriptor buffer. 345392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 346392ca68b401e0797115a08836642faad5778fdb2George Spelvin * The return value is the number of bytes filled in: 2 + 2*strlen(s) or 347392ca68b401e0797115a08836642faad5778fdb2George Spelvin * buflen, whichever is less. 348392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 349392ca68b401e0797115a08836642faad5778fdb2George Spelvin * USB String descriptors can contain at most 126 characters; input 350392ca68b401e0797115a08836642faad5778fdb2George Spelvin * strings longer than that are truncated. 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 352392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 353392ca68b401e0797115a08836642faad5778fdb2George Spelvinascii2desc(char const *s, u8 *buf, unsigned len) 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 355392ca68b401e0797115a08836642faad5778fdb2George Spelvin unsigned n, t = 2 + 2*strlen(s); 356392ca68b401e0797115a08836642faad5778fdb2George Spelvin 357392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (t > 254) 358392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = 254; /* Longest possible UTF string descriptor */ 359392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > t) 360392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = t; 361392ca68b401e0797115a08836642faad5778fdb2George Spelvin 362392ca68b401e0797115a08836642faad5778fdb2George Spelvin t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ 363392ca68b401e0797115a08836642faad5778fdb2George Spelvin 364392ca68b401e0797115a08836642faad5778fdb2George Spelvin n = len; 365392ca68b401e0797115a08836642faad5778fdb2George Spelvin while (n--) { 366392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t; 367392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (!n--) 368392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 369392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t >> 8; 370392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = (unsigned char)*s++; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 372392ca68b401e0797115a08836642faad5778fdb2George Spelvin return len; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 375392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 376392ca68b401e0797115a08836642faad5778fdb2George Spelvin * rh_string() - provides string descriptors for root hub 377392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 379392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @data: buffer for output packet 380392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: length of the provided buffer 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 384392ca68b401e0797115a08836642faad5778fdb2George Spelvin * Returns the number of bytes filled in: the length of the descriptor or 385392ca68b401e0797115a08836642faad5778fdb2George Spelvin * of the provided buffer, whichever is less. 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 387392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 388392ca68b401e0797115a08836642faad5778fdb2George Spelvinrh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) 38971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 390392ca68b401e0797115a08836642faad5778fdb2George Spelvin char buf[100]; 391392ca68b401e0797115a08836642faad5778fdb2George Spelvin char const *s; 392392ca68b401e0797115a08836642faad5778fdb2George Spelvin static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 395392ca68b401e0797115a08836642faad5778fdb2George Spelvin switch (id) { 396392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 0: 397392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ 398392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ 399392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > 4) 400392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = 4; 401392ca68b401e0797115a08836642faad5778fdb2George Spelvin memcpy(data, langids, len); 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 403392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 1: 404392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Serial number */ 405392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->self.bus_name; 406392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 407392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 2: 408392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Product name */ 409392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->product_desc; 410392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 411392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 3: 412392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Manufacturer */ 41396b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 41496b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 415392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = buf; 416392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 418392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Can't happen; caller guarantees it */ 419392ca68b401e0797115a08836642faad5778fdb2George Spelvin return 0; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 421392ca68b401e0797115a08836642faad5778fdb2George Spelvin 422392ca68b401e0797115a08836642faad5778fdb2George Spelvin return ascii2desc(s, data, len); 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 43254bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 43354bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 43571d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 436e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4377329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4387329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 442e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 443e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 444e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 445e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 446e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 447b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 448e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 463fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 464fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 465fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 466fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 467fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 468fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 469fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 470fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 471fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 472fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 473fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 474fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 475fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 476fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 477fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 478fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 480fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 481fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 488fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 493fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 494fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 495fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 5087dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5097dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 510d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 5117dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5127dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 5147dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5157dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 5177dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5187dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5207dd19e69d131ea34f74397559b422511e54d2911Viral Mehta } 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5227329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5237329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 5267dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5277dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 528d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 529d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 5307dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5317dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5347dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5357dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5387dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5397dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5407dd19e69d131ea34f74397559b422511e54d2911Viral Mehta goto error; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 542fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 54671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 54771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 54871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 54971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 587b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 588b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 589b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 590b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 591b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 592b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 593b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 594b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 596b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 597b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 598b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 612b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6287329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6297329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6307329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6317329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6327329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6337329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6347329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6389439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 639e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6449439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6459439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6464a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6479439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6489439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6499439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 656d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 657d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 660d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 661d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 663d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 664d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 665d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 666d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 667d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 668ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches char buffer[6]; /* Any root hubs with > 31 ports? */ 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6706d88e6792574497bfac9a81403cc47712040636fAlan Stern if (unlikely(!hcd->rh_pollable)) 6711b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 672d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 673d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 675d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 676d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 678d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 6799439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 680d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 681d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 682541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 683e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 684e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 685e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 6869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 687e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6889439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6894a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 6909439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 691e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 692d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 693541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 694e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6959439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 698d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 69901cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 70001cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 70101cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 702541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : 703d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 70401cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 706d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 709d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 710d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 711d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 712d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 713d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 714d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 716d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 718d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 72071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 722d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 723e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 724d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 725d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 726e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 727e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 729e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 730e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 731e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 733e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 734e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 735e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 736e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 737e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 738e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 739541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern else if (HCD_POLL_PENDING(hcd)) 740e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 741e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 742e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 743d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 744d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7495e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 750d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7515e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 753d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 758455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 759455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 760d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 761e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 763455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 764e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7669439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 767e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 768e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 769e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 770e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7715e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 772455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 773d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 774d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 775d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 776455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 777d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 778d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 779e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7819439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7824a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 7839439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 7849439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 7859439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 786e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 7879439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 788e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7915234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 7945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 7995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 8085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 8115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 8135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 8155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 8165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 8245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 8255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 8265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 8275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8505234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 887eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8904186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 892eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 894eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 896eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 897eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 8985a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 9014186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9033099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 905eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 906eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 908eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 909eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 910eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 911eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9314186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9334186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9353099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9418ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9448ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 945b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 946b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 947b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 949b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 952b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9634186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 965551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9684186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9707071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9777071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9794186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1032498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1034498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1041782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1052e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1053e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1057e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1058e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1059e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1060e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1061e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1062e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1063e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1064e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1065e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1066e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1067e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 107449367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10779f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10846840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10856840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10866840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10876840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10886840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1096eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10979a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 11009a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 11019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1104e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 11069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1107e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 11089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1109e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1110e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1112e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1113e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1114e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1115e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1116e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1117e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1118e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1119e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1120e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1121e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1122e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1123e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1124e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1125e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1126e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1127e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1128e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1138e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1139e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1144eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1145e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1146eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 11499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 11519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 11529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1153541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (!HCD_SAW_IRQ(hcd) && !is_root_hub(urb->dev)) { 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 11559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 11569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 11579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1159e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1161e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1163e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1164e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1165e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1166e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1167e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1168e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1169e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1170e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1171e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1172e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1173e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1176e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1178e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1180e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1182b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1183b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1236b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1251b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1252b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1253b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1254b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1255b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1261ff9c895f07d36193c75533bda8193bde8ca99d02Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 1262ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern{ 1263ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern enum dma_data_direction dir; 1264ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1265ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) 1266ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1267ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->setup_dma, 1268ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1269ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1270ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) 1271ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1272ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->setup_dma, 1273ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern (void **) &urb->setup_packet, 1274ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1275ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1276ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1277ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1278ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_DMA_MAP_SG) 1279ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_sg(hcd->self.controller, 1280910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1281ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1282ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1283ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_PAGE) 1284ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_page(hcd->self.controller, 1285ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1286ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1287ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1288ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) 1289ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1290ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1291ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1292ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1293ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_MAP_LOCAL) 1294ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1295ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_dma, 1296ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_buffer, 1297ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1298ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1299ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1300ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern /* Make it safe to call this routine more than once */ 1301ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL | 1302ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | 1303ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); 1304ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern} 1305ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1306b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1307b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 13089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1309b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1310b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1311b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 13129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 13139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1314e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1315e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1317b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 131885bcb5ee889e0ebb9154718939e049de265fcdfbAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) { 131985e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1320b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1323b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 132585e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (dma_mapping_error(hcd->self.controller, 132685e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->setup_dma)) 132785e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger return -EAGAIN; 1328ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_SINGLE; 1329f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1330b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1331b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1332b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1333b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1334b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1335b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1336ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret) 1337ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern return ret; 1338ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_LOCAL; 1339f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } 1340b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1341b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1342b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1343ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_buffer_length != 0 1344b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 134585e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1346ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->num_sgs) { 1347ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern int n = dma_map_sg( 1348ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1349910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1350ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1351ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1352ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n <= 0) 1353ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1354ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1355ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SG; 1356ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n != urb->num_sgs) { 1357ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs = n; 1358ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= 1359ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_SG_COMBINED; 1360ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1361ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else if (urb->sg) { 1362910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox struct scatterlist *sg = urb->sg; 1363ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_page( 1364ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1365ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg_page(sg), 1366ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg->offset, 1367ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1368ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1369ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 137085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->transfer_dma)) 1371ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1372ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1373ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_PAGE; 1374ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1375ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_single( 1376ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1377ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer, 1378ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1379ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1380ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 1381ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma)) 1382ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1383ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1384ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SINGLE; 1385ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 138685e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1387b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1388b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1389b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1390b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1391b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1392b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1393ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret == 0) 1394ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_MAP_LOCAL; 1395b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1396ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | 1397ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_SETUP_MAP_LOCAL))) 1398ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern unmap_urb_for_dma(hcd, urb); 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1400b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 14019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 14049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 14069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 14079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 14089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 14099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 14119a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 14129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 14139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 14149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 14169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 14179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 14189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14199a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 14209a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 14214d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 14229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 14239a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14249a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 14259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 14269a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 14279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 14289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 14299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 14309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1431b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1432ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (is_root_hub(urb->dev)) { 1433e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1434ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1435ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = map_urb_for_dma(hcd, urb, mem_flags); 1436ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (likely(status == 0)) { 1437ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 1438ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (unlikely(status)) 1439ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern unmap_urb_for_dma(hcd, urb); 1440ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1441ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 14429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 1445b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 14469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 14479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 14484d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 144949367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 14509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 14519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1463e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 14641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1467809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1468e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1474e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1485a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1488cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1489cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1491cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1492cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1493cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1494cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1495cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1496cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1497cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1498cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1499cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1500cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1501cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1502cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1503cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1504cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1505cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1506cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1510e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 15119a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 15129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 151832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 151932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 152032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 152132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 15224a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 152332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 152432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 152532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 152632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 152732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 152832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 152932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1530eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 15314a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1532eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1533eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 153432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 15354a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 153632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1537b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1538eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 15394a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1540eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1541b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 15424a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 15434a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 154432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 15451f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern unmap_urb_for_dma(hcd, urb); 15464a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 15471f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 15481f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 154932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 15504a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 155132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 155232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 155349367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 155432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 155532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 155632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1557782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 155832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 155932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 156032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 156195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 156295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 156395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 156595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1566a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 157195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 157295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 15739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 15741720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 157695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 15779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1578ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 15805e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1582eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 15855e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1586809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1588e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1589e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1590e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1591e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1592e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1593e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1594e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1595e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1596e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1597e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1598e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1599e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1600e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1601e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1602e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1603e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1604e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1605e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1606e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1607e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1611ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 161695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1617455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1618809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1619455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1620455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1621455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1622455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1623455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1624455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1625455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1626455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1627809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1628455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1629455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1630455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1631455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1632455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1633455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16363f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp/** 163770445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds 163870445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * the bus bandwidth 163970445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * @udev: target &usb_device 16403f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_config: new configuration to install 16413f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @cur_alt: the current alternate interface setting 16423f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_alt: alternate interface setting that is being installed 16433f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16443f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change configurations, pass in the new configuration in new_config, 16453f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass NULL for cur_alt and new_alt. 16463f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16473f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To reset a device's configuration (put the device in the ADDRESSED state), 16483f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in NULL for new_config, cur_alt, and new_alt. 16493f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16503f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change alternate interface settings, pass in NULL for new_config, 16513f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in the current alternate interface setting in cur_alt, 16523f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass in the new alternate interface setting in new_alt. 16533f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16543f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * Returns an error if the requested bandwidth change exceeds the 16553f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * bus bandwidth or host controller internal resources. 165679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 16573f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharpint usb_hcd_alloc_bandwidth(struct usb_device *udev, 165879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 16593f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *cur_alt, 16603f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *new_alt) 166179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 166279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 1663576a362ad2103da481e1f6e13de01f33d3d4c7b1H Hartley Sweeten struct usb_host_interface *alt = NULL; 166479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 166579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 166679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 166779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 166879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 166979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 167079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 167179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 167279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 16733f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!new_config && !cur_alt) { 167479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 167579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 167679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 167779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 167879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 167979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 168079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 168179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 168279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 168379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 168479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 168579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 168679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 168779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 168879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 168979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 169079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 169179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 169279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 169379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 169479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 169579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 169679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 169779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 169879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 169979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 170079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 170179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 170279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 170379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 170479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 170579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 170679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 170779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 170879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 170979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 1710d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp struct usb_host_interface *first_alt; 1711d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp int iface_num; 1712d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp 1713d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp first_alt = &new_config->intf_cache[i]->altsetting[0]; 1714d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp iface_num = first_alt->desc.bInterfaceNumber; 171591017f9cf5fcfb601b8d583c896ac7de7d200c57Sarah Sharp /* Set up endpoints for alternate interface setting 0 */ 1716d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = usb_find_alt_setting(new_config, iface_num, 0); 17173f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!alt) 17183f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* No alt setting 0? Pick the first setting. */ 1719d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = first_alt; 17203f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp 172179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 172279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 172379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 172479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 172579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 172679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 172779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 17283f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (cur_alt && new_alt) { 172904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp struct usb_interface *iface = usb_ifnum_to_if(udev, 173004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt->desc.bInterfaceNumber); 173104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 173204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (iface->resetting_device) { 173304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp /* 173404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * The USB core just reset the device, so the xHCI host 173504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * and the device will think alt setting 0 is installed. 173604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * However, the USB core will pass in the alternate 173704a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting installed before the reset as cur_alt. Dig 173804a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * out the alternate setting 0 structure, or the first 173904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * alternate setting if a broken device doesn't have alt 174004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting 0. 174104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp */ 174204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = usb_altnum_to_altsetting(iface, 0); 174304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (!cur_alt) 174404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = &iface->altsetting[0]; 174504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp } 174604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 17473f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Drop all the endpoints in the current alt setting */ 17483f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { 17493f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, 17503f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &cur_alt->endpoint[i]); 17513f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17523f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17533f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17543f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Add all the endpoints in the new alt setting */ 17553f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { 17563f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, 17573f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &new_alt->endpoint[i]); 17583f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17593f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17603f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17613f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 176279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 176379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 176479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 176579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 176679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 176779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 176879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 176995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 177095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 177195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 177295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 177395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 177495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 177595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 177695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 177795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 177895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 177995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 178095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 178195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 178295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 178395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 178495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 178595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 178695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 178795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 17883444b26afa145148951112534f298bdc554ec789David Vrabel/** 17893444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 17903444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 17913444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 17923444b26afa145148951112534f298bdc554ec789David Vrabel * 17933444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 17943444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 17953444b26afa145148951112534f298bdc554ec789David Vrabel */ 17963444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 17973444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 17983444b26afa145148951112534f298bdc554ec789David Vrabel{ 17993444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 18003444b26afa145148951112534f298bdc554ec789David Vrabel 18013444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 18023444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 18033444b26afa145148951112534f298bdc554ec789David Vrabel else { 18043444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 18053444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 18063444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 18073444b26afa145148951112534f298bdc554ec789David Vrabel 18083444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 18093444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 18103444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 18113444b26afa145148951112534f298bdc554ec789David Vrabel } 18123444b26afa145148951112534f298bdc554ec789David Vrabel} 18133444b26afa145148951112534f298bdc554ec789David Vrabel 1814eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1815eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_alloc_streams - allocate bulk endpoint stream IDs. 1816eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1817eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints that need streams. 1818eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1819eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_streams: number of streams to allocate. 1820eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1821eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1822eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Sets up a group of bulk endpoints to have num_streams stream IDs available. 1823eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Drivers may queue multiple transfers to different stream IDs, which may 1824eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * complete in a different order than they were queued. 1825eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1826eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpint usb_alloc_streams(struct usb_interface *interface, 1827eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1828eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp unsigned int num_streams, gfp_t mem_flags) 1829eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1830eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1831eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1832eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1833eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1834eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1835eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1836eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) 1837eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1838eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1839eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1840eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1841eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1842eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1843eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) 1844eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1845eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1846eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, 1847eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp num_streams, mem_flags); 1848eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1849eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_alloc_streams); 1850eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1851eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1852eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_free_streams - free bulk endpoint stream IDs. 1853eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1854eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints to remove streams from. 1855eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1856eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1857eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1858eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Reverts a group of bulk endpoints back to not using stream IDs. 1859eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Can fail if we are given bad arguments, or HCD is broken. 1860eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1861eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpvoid usb_free_streams(struct usb_interface *interface, 1862eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1863eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 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 (dev->speed != USB_SPEED_SUPER) 1872eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1873eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1874eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1875eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1876eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) 1877eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1878eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1879eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); 1880eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1881eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_free_streams); 1882eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1883cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1884cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1885cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1886cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1887cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1888cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1889cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1890cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1891cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1892cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1893cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 18941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 189632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 189732aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 189832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 189932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 190032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 190132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 190232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 190332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 190432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 190532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 190632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 190732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19089293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 191065bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1912686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1913686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1914686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1916686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 191765bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 1918686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1919686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1920686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1921686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1922686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1923686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1924686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1925686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 19269293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1927686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1928686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1929686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 19309293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1931686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 19329293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 193565bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 19361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1937686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1938686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1939cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 19401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1941686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 194265bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 1943ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 19440c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 19459293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1946979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1947979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1948686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 19499293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1950686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1951686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1952686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1953686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1954686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1955686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1956686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 19579293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1958686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1959cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1960686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 19619293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1962cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1963cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 19649293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 19659293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19689bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_PM */ 19699bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 19709bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 19719bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 19726b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 19736b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 19746b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 19756b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 19766b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 19776b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 19786b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 19790534d46848990e8eed7cd0832d745d813e827261Alan Stern usb_remote_wakeup(udev); 19806b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 19816b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 19826b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 19851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 19896b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 19906b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 1997ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern if (hcd->rh_registered) { 1998ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 19999bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern queue_work(pm_wq, &hcd->wakeup_work); 2000ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern } 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 20021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20039293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20059bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_USB_SUSPEND */ 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 20101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 20131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 20141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 20151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 20181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 20191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 20201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 20231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 20251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 20281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 20291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 20301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 20341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 20361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 20371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 20391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 20401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2042782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 20451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 20551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20567d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 2059de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 2060de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2062de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 2063de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 2064de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 2065de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 2066de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2068541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (unlikely(hcd->state == HC_STATE_HALT || !HCD_HW_ACCESSIBLE(hcd))) { 2069de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2070de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 2071de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2072de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 2073de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 20748de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2075de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 2076de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 2077de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 2078de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 2079de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2080de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 2081de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 2102541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 21101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 21171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 21181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 21191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 21201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 21211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 21241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 21251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 21271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 21291b26da1510c02a2dac33c0ea48904256dcec4617Greg Kroah-Hartman struct device *dev, const char *bus_name) 21301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21337b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 21391720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 2144dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 2147d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 2148d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 21499bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 21506b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 21516b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 21523f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp mutex_init(&hcd->bandwidth_mutex); 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2159782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21611720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 21621720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 21631720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 21641720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 21651720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 21661720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 21671720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 21681720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 21691720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 21701720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 21711720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 21721720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 21731720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 2174782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 21751720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21781720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 21791720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 21801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2181782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 21861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21968ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 21978ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 22028de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 22038de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2204b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2205b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2206b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2207b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 22148ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2216b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2217b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2218b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2219b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2220b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 22216d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->self.root_hub = rhdev; 22226b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 22236b403b020c1f42180b14d28d832da61167cff822Sarah Sharp switch (hcd->driver->flags & HCD_MASK) { 22246b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 22256b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 22266b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 22276b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 22286b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 22296b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 22306b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 22316b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 22326b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 22336b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 223496e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern goto err_set_rh_speed; 22356b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2236b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2237db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2238db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2239db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2240db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2241db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 2242db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 2243b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2244b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2245b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2246b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2247b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2248b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2249b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 22506d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 1; 2251b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2252fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2253fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2254fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2255b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2256b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2257b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 22581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 2259de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2260de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work as advertised when used together 2261de85422b94ddb23c021126815ea49414047c13dcStefan Becker * with IRQF_SHARED. As usb_hcd_irq() will always disable 2262de85422b94ddb23c021126815ea49414047c13dcStefan Becker * interrupts we can remove it here. 2263de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 226483a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand if (irqflags & IRQF_SHARED) 226583a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand irqflags &= ~IRQF_DISABLED; 2266de85422b94ddb23c021126815ea49414047c13dcStefan Becker 22671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 22691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 22701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 22711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 2272c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 22738ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 22741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 2276c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 22771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 22781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 22791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 22801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 22811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 22821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 22831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 22841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 22851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 22861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 22871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 22901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 22918ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 22921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2294b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 229555c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2296b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 22978ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 22988ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 22995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 23005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 23015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 23025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 23035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 23045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2305541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) 2306d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 23071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 23081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 231096e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern if (HC_IS_RUNNING(hcd->state)) 231196e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_QUIESCING; 231296e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_lock_irq(&hcd_root_hub_lock); 231396e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->rh_registered = 0; 231496e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 231596e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 231696e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#ifdef CONFIG_USB_SUSPEND 231796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern cancel_work_sync(&hcd->wakeup_work); 231896e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#endif 23195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 23206d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 23215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2322b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 23236d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2324541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 23256d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 23268ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 232796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_HALT; 2328541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 232996e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern del_timer_sync(&hcd->rh_timer); 2330b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 23311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 23321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2333b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2334b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 233596e077ae347912dfce0e93f5958efc3ed6f311f4Alan Sternerr_set_rh_speed: 23366d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 2337b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 23381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2339b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 23401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 23411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 23421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2343782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 23441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 23461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 23471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 23481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 23491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 23501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 23511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 23521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 23531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 23541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23556d88e6792574497bfac9a81403cc47712040636fAlan Stern struct usb_device *rhdev = hcd->self.root_hub; 23566d88e6792574497bfac9a81403cc47712040636fAlan Stern 23571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 23581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23596d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_get_dev(rhdev); 23606d88e6792574497bfac9a81403cc47712040636fAlan Stern sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); 236196e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 23621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 23631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 23641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 23661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 23671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 23681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 23699ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 23709bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 2371d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 23726b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 23736b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 23744186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 23756d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 23764186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 23771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23786d88e6792574497bfac9a81403cc47712040636fAlan Stern /* Prevent any more root-hub status calls from the timer. 23796d88e6792574497bfac9a81403cc47712040636fAlan Stern * The HCD might still restart the timer (if a port status change 23806d88e6792574497bfac9a81403cc47712040636fAlan Stern * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke 23816d88e6792574497bfac9a81403cc47712040636fAlan Stern * the hub_status_data() callback. 23826d88e6792574497bfac9a81403cc47712040636fAlan Stern */ 23836d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2384541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 23856d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 23866d88e6792574497bfac9a81403cc47712040636fAlan Stern 23871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 23881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 23891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23906d88e6792574497bfac9a81403cc47712040636fAlan Stern /* In case the HCD restarted the timer, stop it again. */ 2391541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 23921b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 23931b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 23941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 23951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 23966d88e6792574497bfac9a81403cc47712040636fAlan Stern 23976d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 23981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 23991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 24001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2401782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 24021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 240364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 240464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 240564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 240664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 240764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 240864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 240964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 241064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2411782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 241264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 24131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 24141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2415f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 24161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 24181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 24201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 24211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 24221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 24231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 24241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 24251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 24261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 24281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 24311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 24321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 24341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 24351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 24361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 24371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 24381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 24401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 24431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 24441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 24451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 24471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 24481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 24491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 24501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2451f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2452