hcd.c revision abc4f9b099e9e7db3f6f945210aee125571c236d
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Linus Torvalds 1999 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Johannes Erdfelt 1999-2001 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Andreas Gal 1999 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Gregory P. Smith 1999 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Deti Fliegl 1999 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Randy Dunlap 2000 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright David Brownell 2000-2002 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * option) any later version. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software Foundation, 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 38b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm#include <asm/unaligned.h> 3964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov#include <linux/platform_device.h> 406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#include <linux/workqueue.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 4327729aadd31dafddaaf64c24f8ef6d0ff750f3aaEric Lescouet#include <linux/usb/hcd.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 839beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 849beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 859beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 869beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 994186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 105809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 106809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 108cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 109cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 114809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 115809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 130d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 131d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 142cd780694920fbf869b23c8afb0bd083e7b0448c7Alan Stern 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ 143d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1597329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16016f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 162667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 163667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18316f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 185667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 186667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29088fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 296d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 297d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 300d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x19, 0x00, /* __le16 wTotalLength; FIXME */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 330d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 331d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* 332d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * All 3.0 hubs should have an endpoint companion descriptor, 333d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * but we're ignoring that for now. FIXME? 334d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp */ 335d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 336d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 339392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 340392ca68b401e0797115a08836642faad5778fdb2George Spelvin * ascii2desc() - Helper routine for producing UTF-16LE string descriptors 341392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @s: Null-terminated ASCII (actually ISO-8859-1) string 342392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @buf: Buffer for USB string descriptor (header + UTF-16LE) 343392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: Length (in bytes; may be odd) of descriptor buffer. 344392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 345392ca68b401e0797115a08836642faad5778fdb2George Spelvin * The return value is the number of bytes filled in: 2 + 2*strlen(s) or 346392ca68b401e0797115a08836642faad5778fdb2George Spelvin * buflen, whichever is less. 347392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 348392ca68b401e0797115a08836642faad5778fdb2George Spelvin * USB String descriptors can contain at most 126 characters; input 349392ca68b401e0797115a08836642faad5778fdb2George Spelvin * strings longer than that are truncated. 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 351392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 352392ca68b401e0797115a08836642faad5778fdb2George Spelvinascii2desc(char const *s, u8 *buf, unsigned len) 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 354392ca68b401e0797115a08836642faad5778fdb2George Spelvin unsigned n, t = 2 + 2*strlen(s); 355392ca68b401e0797115a08836642faad5778fdb2George Spelvin 356392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (t > 254) 357392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = 254; /* Longest possible UTF string descriptor */ 358392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > t) 359392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = t; 360392ca68b401e0797115a08836642faad5778fdb2George Spelvin 361392ca68b401e0797115a08836642faad5778fdb2George Spelvin t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ 362392ca68b401e0797115a08836642faad5778fdb2George Spelvin 363392ca68b401e0797115a08836642faad5778fdb2George Spelvin n = len; 364392ca68b401e0797115a08836642faad5778fdb2George Spelvin while (n--) { 365392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t; 366392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (!n--) 367392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 368392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t >> 8; 369392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = (unsigned char)*s++; 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 371392ca68b401e0797115a08836642faad5778fdb2George Spelvin return len; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 374392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 375392ca68b401e0797115a08836642faad5778fdb2George Spelvin * rh_string() - provides string descriptors for root hub 376392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 378392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @data: buffer for output packet 379392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: length of the provided buffer 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 383392ca68b401e0797115a08836642faad5778fdb2George Spelvin * Returns the number of bytes filled in: the length of the descriptor or 384392ca68b401e0797115a08836642faad5778fdb2George Spelvin * of the provided buffer, whichever is less. 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 386392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 387392ca68b401e0797115a08836642faad5778fdb2George Spelvinrh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) 38871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 389392ca68b401e0797115a08836642faad5778fdb2George Spelvin char buf[100]; 390392ca68b401e0797115a08836642faad5778fdb2George Spelvin char const *s; 391392ca68b401e0797115a08836642faad5778fdb2George Spelvin static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 394392ca68b401e0797115a08836642faad5778fdb2George Spelvin switch (id) { 395392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 0: 396392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ 397392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ 398392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > 4) 399392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = 4; 400392ca68b401e0797115a08836642faad5778fdb2George Spelvin memcpy(data, langids, len); 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 402392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 1: 403392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Serial number */ 404392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->self.bus_name; 405392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 406392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 2: 407392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Product name */ 408392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->product_desc; 409392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 410392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 3: 411392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Manufacturer */ 41296b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 41396b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 414392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = buf; 415392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 417392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Can't happen; caller guarantees it */ 418392ca68b401e0797115a08836642faad5778fdb2George Spelvin return 0; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 420392ca68b401e0797115a08836642faad5778fdb2George Spelvin 421392ca68b401e0797115a08836642faad5778fdb2George Spelvin return ascii2desc(s, data, len); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 43154bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 43254bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 43471d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 435e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4367329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4377329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4399439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 441e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 442e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 443e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 444e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 445e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 446b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 447e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 462fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 463fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 464fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 465fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 466fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 467fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 468fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 469fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 470fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 471fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 472fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 473fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 474fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 475fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 476fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 477fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 479fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 480fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 487fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 492fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 493fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 494fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 5077dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5087dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 509d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 5107dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5117dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 5137dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5147dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 5167dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5177dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5197dd19e69d131ea34f74397559b422511e54d2911Viral Mehta } 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5217329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5227329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 5257dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5267dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 527d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 528d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 5297dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5307dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5337dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5347dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5377dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5387dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5397dd19e69d131ea34f74397559b422511e54d2911Viral Mehta goto error; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 541fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 54571d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 54671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 54771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 54871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 586b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 587b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 588b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 589b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 590b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 591b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 592b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 593b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 595b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 596b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 597b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 611b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6277329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6287329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6297329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6307329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6317329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6327329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6337329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6379439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 638e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6399439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6409439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6449439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6454a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6469439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6479439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6489439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 655d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 656d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 657d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 659d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 660d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 662d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 663d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 664d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 665d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 666d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 667ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches char buffer[6]; /* Any root hubs with > 31 ports? */ 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6696d88e6792574497bfac9a81403cc47712040636fAlan Stern if (unlikely(!hcd->rh_pollable)) 6701b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 671d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 672d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 674d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 675d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 677d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 6789439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 679d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 680d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 681541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 682e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 683e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 684e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 6859439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 686e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6879439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6884a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 6899439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 690e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 691d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 692541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 693e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6949439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 697d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 69801cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 69901cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 70001cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 701541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : 702d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 70301cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 705d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 708d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 709d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 710d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 711d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 712d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 713d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 715d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 717d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 71971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 721d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 722e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 723d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 724d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 725e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 726e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 728e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 729e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 730e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 732e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 733e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 734e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 735e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 736e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 737e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 738541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern else if (HCD_POLL_PENDING(hcd)) 739e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 740e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 741e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 742d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 743d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7485e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 749d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7505e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 752d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 757455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 758455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 759d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 760e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 762455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 763e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7659439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 766e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 767e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 768e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 769e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7705e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 771455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 772d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 773d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 774d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 775455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 776d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 777d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 778e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7809439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7814a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 7829439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 7839439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 7849439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 785e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 7869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 787e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7905234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7915234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 7935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 7985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 8075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 8105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 8125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 8145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 8155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 8235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 8245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 8255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 8265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 886eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8894186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 891eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 893eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 895eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 896eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 8975a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 9004186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9023099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 904eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 905eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 907eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 908eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 909eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 910eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9304186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9324186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9343099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9408ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9438ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 944b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 945b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 946b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 948b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 951b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9624186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 964551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9674186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9697071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9767071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9784186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9869b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd) || hcd->state == HC_STATE_HALT) 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1031498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1033498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1040782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1052e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1053e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1057e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1058e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1059e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1060e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1061e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1062e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1063e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1064e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1065e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1066e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1070e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 107349367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10769f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10836840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10846840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10856840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10866840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10876840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10929b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_RH_RUNNING(hcd)) { 1093eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10949a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10959b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } else { 10969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 10979a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10999a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1100e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 11029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1103e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 11049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1105e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1106e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1107e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1108e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1109e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1110e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1112e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1113e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1114e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1115e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1116e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1117e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1118e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1119e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1120e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1121e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1122e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1123e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1124e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11269a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1134e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1135e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1140eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1141e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1142eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 11459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 11469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 11479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 11489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1149541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (!HCD_SAW_IRQ(hcd) && !is_root_hub(urb->dev)) { 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 11519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 11529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 11539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1155e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1157e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1159e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1160e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1161e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1162e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1163e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1164e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1165e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1166e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1167e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1168e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1169e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1172e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1174e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1176e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1178b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1179b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1180b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1181b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1182b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1183b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12174307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi if (*vaddr_handle == NULL) { 12184307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi WARN_ON_ONCE(1); 12194307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi return -EFAULT; 12204307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi } 12214307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1236b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1251b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1252b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1253b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1254b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1255b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1262c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morellvoid usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) 1263ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern{ 1264ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) 1265ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1266ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->setup_dma, 1267ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1268ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1269ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) 1270ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1271ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->setup_dma, 1272ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern (void **) &urb->setup_packet, 1273ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1274ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1275ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 12761dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey /* Make it safe to call this routine more than once */ 12771dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); 12781dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey} 1279c8cf203a1d228fa001b95534f639ffb7a23d5386Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); 12801dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 12812694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morellstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12822694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell{ 12832694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell if (hcd->driver->unmap_urb_for_dma) 12842694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell hcd->driver->unmap_urb_for_dma(hcd, urb); 12852694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell else 12862694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell usb_hcd_unmap_urb_for_dma(hcd, urb); 12872694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell} 12882694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell 1289c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morellvoid usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12901dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey{ 12911dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey enum dma_data_direction dir; 12921dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 1293c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morell usb_hcd_unmap_urb_setup_for_dma(hcd, urb); 12941dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 1295ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1296ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_DMA_MAP_SG) 1297ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_sg(hcd->self.controller, 1298910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1299ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1300ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1301ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_PAGE) 1302ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_page(hcd->self.controller, 1303ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1304ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1305ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1306ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) 1307ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1308ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1309ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1310ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1311ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_MAP_LOCAL) 1312ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1313ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_dma, 1314ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_buffer, 1315ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1316ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1317ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1318ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern /* Make it safe to call this routine more than once */ 13191dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | 1320ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); 1321ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern} 1322c8cf203a1d228fa001b95534f639ffb7a23d5386Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); 1323ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1324b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1325b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 13269a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 13272694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell if (hcd->driver->map_urb_for_dma) 13282694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); 13292694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell else 13302694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); 13312694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell} 13322694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell 13332694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morellint usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 13342694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell gfp_t mem_flags) 13352694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell{ 1336b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1337b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1338b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 13399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 13409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1341e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1342e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1344b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 134585bcb5ee889e0ebb9154718939e049de265fcdfbAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) { 134607a8cdd2bb17a4da68136d963b8bc71959bd31a5Anand Gadiyar if (hcd->self.uses_pio_for_control) 134707a8cdd2bb17a4da68136d963b8bc71959bd31a5Anand Gadiyar return ret; 134885e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1349b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1352b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 135485e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (dma_mapping_error(hcd->self.controller, 135585e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->setup_dma)) 135685e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger return -EAGAIN; 1357ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_SINGLE; 1358f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1359b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1360b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1361b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1362b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1363b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1364b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1365ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret) 1366ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern return ret; 1367ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_LOCAL; 1368f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } 1369b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1370b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1371b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1372ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_buffer_length != 0 1373b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 137485e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1375ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->num_sgs) { 1376ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern int n = dma_map_sg( 1377ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1378910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1379ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1380ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1381ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n <= 0) 1382ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1383ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1384ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SG; 1385ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n != urb->num_sgs) { 1386ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs = n; 1387ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= 1388ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_SG_COMBINED; 1389ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1390ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else if (urb->sg) { 1391910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox struct scatterlist *sg = urb->sg; 1392ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_page( 1393ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1394ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg_page(sg), 1395ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg->offset, 1396ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1397ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1398ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 139985e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->transfer_dma)) 1400ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1401ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1402ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_PAGE; 1403ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1404ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_single( 1405ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1406ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer, 1407ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1408ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1409ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 1410ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma)) 1411ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1412ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1413ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SINGLE; 1414ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 141585e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1416b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1417b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1418b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1419b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1420b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1421b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1422ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret == 0) 1423ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_MAP_LOCAL; 1424b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1425ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | 1426ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_SETUP_MAP_LOCAL))) 1427c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morell usb_hcd_unmap_urb_for_dma(hcd, urb); 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1429b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 14309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 14312694a48d9007a8bdf1731c1b97d4942c9cc49296Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 14349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 14369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 14379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 14389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 14399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 14419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 14429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 14439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 14449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 14469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 14479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 14489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 14509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 14514d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 14529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 14539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 14559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 14569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 14579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 14589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 14599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 14609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1461b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1462ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (is_root_hub(urb->dev)) { 1463e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1464ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1465ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = map_urb_for_dma(hcd, urb, mem_flags); 1466ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (likely(status == 0)) { 1467ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 1468ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (unlikely(status)) 14692694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell unmap_urb_for_dma(hcd, urb); 1470ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1471ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 14729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 1475b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 14769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 14779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 14784d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 147949367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 14809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 14819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1493e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1497809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1498e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1504e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1515a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1518cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1519cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1522cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1523cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1524cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1525cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1526cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1527cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1528cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1529cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1530cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1531cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1532cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1533cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1534cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1535cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1536cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1540e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 15419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 15429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 154832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 154932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 155032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 155132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 15524a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 155332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 155432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 155532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 155632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 155732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 155832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 155932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1560eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 15614a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1562eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1563eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 156432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 15654a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 156632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1567b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1568eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 15694a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1570eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1571b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 15724a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 15734a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 157432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 15752694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell unmap_urb_for_dma(hcd, urb); 15764a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 15771f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 15781f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 157932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 15804a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 158132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 158232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 158349367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 158432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 158532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 158632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1587782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 158832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 158932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 159032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 159195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 159295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 159395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 159595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1596a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 160195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 160295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 16039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 16041720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 160695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 16079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1608ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 16105e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1612eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 16155e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1616809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1618e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1619e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1620e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1621e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1622e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1623e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1624e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1625e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1626e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1627e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1628e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1629e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1630e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1631e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1632e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1633e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1634e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1635e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1636e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1637e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1641ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 164695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1647455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1648809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1649455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1650455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1651455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1652455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1653455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1654455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1655455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1656455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1657809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1658455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1659455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1660455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1661455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1662455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1663455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16663f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp/** 166770445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds 166870445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * the bus bandwidth 166970445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * @udev: target &usb_device 16703f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_config: new configuration to install 16713f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @cur_alt: the current alternate interface setting 16723f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_alt: alternate interface setting that is being installed 16733f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16743f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change configurations, pass in the new configuration in new_config, 16753f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass NULL for cur_alt and new_alt. 16763f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16773f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To reset a device's configuration (put the device in the ADDRESSED state), 16783f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in NULL for new_config, cur_alt, and new_alt. 16793f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16803f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change alternate interface settings, pass in NULL for new_config, 16813f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in the current alternate interface setting in cur_alt, 16823f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass in the new alternate interface setting in new_alt. 16833f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16843f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * Returns an error if the requested bandwidth change exceeds the 16853f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * bus bandwidth or host controller internal resources. 168679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 16873f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharpint usb_hcd_alloc_bandwidth(struct usb_device *udev, 168879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 16893f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *cur_alt, 16903f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *new_alt) 169179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 169279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 1693576a362ad2103da481e1f6e13de01f33d3d4c7b1H Hartley Sweeten struct usb_host_interface *alt = NULL; 169479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 169579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 169679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 169779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 169879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 169979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 170079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 170179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 170279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 17033f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!new_config && !cur_alt) { 170479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 170579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 170679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 170779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 170879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 170979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 171079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 171179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 171279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 171379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 171479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 171579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 171679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 171779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 171879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 171979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 172079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 172179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 172279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 172379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 172479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 172579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 172679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 172779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 172879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 172979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 173079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 173179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 173279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 173379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 173479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 173579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 173679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 173779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 173879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 173979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 1740d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp struct usb_host_interface *first_alt; 1741d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp int iface_num; 1742d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp 1743d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp first_alt = &new_config->intf_cache[i]->altsetting[0]; 1744d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp iface_num = first_alt->desc.bInterfaceNumber; 174591017f9cf5fcfb601b8d583c896ac7de7d200c57Sarah Sharp /* Set up endpoints for alternate interface setting 0 */ 1746d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = usb_find_alt_setting(new_config, iface_num, 0); 17473f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!alt) 17483f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* No alt setting 0? Pick the first setting. */ 1749d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = first_alt; 17503f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp 175179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 175279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 175379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 175479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 175579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 175679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 175779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 17583f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (cur_alt && new_alt) { 175904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp struct usb_interface *iface = usb_ifnum_to_if(udev, 176004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt->desc.bInterfaceNumber); 176104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 176204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (iface->resetting_device) { 176304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp /* 176404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * The USB core just reset the device, so the xHCI host 176504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * and the device will think alt setting 0 is installed. 176604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * However, the USB core will pass in the alternate 176704a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting installed before the reset as cur_alt. Dig 176804a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * out the alternate setting 0 structure, or the first 176904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * alternate setting if a broken device doesn't have alt 177004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting 0. 177104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp */ 177204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = usb_altnum_to_altsetting(iface, 0); 177304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (!cur_alt) 177404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = &iface->altsetting[0]; 177504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp } 177604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 17773f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Drop all the endpoints in the current alt setting */ 17783f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { 17793f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, 17803f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &cur_alt->endpoint[i]); 17813f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17823f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17833f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17843f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Add all the endpoints in the new alt setting */ 17853f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { 17863f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, 17873f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &new_alt->endpoint[i]); 17883f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17893f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17903f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17913f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 179279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 179379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 179479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 179579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 179679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 179779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 179879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 179995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 180095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 180195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 180295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 180395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 180495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 180595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 180695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 180795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 180895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 180995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 181095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 181195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 181295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 181395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 181495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 181595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 181695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 181795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 18183444b26afa145148951112534f298bdc554ec789David Vrabel/** 18193444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 18203444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 18213444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 18223444b26afa145148951112534f298bdc554ec789David Vrabel * 18233444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 18243444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 18253444b26afa145148951112534f298bdc554ec789David Vrabel */ 18263444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 18273444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 18283444b26afa145148951112534f298bdc554ec789David Vrabel{ 18293444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 18303444b26afa145148951112534f298bdc554ec789David Vrabel 18313444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 18323444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 18333444b26afa145148951112534f298bdc554ec789David Vrabel else { 18343444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 18353444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 18363444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 18373444b26afa145148951112534f298bdc554ec789David Vrabel 18383444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 18393444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 18403444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 18413444b26afa145148951112534f298bdc554ec789David Vrabel } 18423444b26afa145148951112534f298bdc554ec789David Vrabel} 18433444b26afa145148951112534f298bdc554ec789David Vrabel 1844eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1845eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_alloc_streams - allocate bulk endpoint stream IDs. 1846eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1847eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints that need streams. 1848eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1849eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_streams: number of streams to allocate. 1850eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1851eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1852eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Sets up a group of bulk endpoints to have num_streams stream IDs available. 1853eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Drivers may queue multiple transfers to different stream IDs, which may 1854eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * complete in a different order than they were queued. 1855eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1856eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpint usb_alloc_streams(struct usb_interface *interface, 1857eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1858eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp unsigned int num_streams, gfp_t mem_flags) 1859eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1860eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1861eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1862eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1863eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1864eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1865eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1866eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) 1867eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1868eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1869eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1870eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1871eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1872eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1873eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) 1874eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1875eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1876eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, 1877eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp num_streams, mem_flags); 1878eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1879eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_alloc_streams); 1880eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1881eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1882eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_free_streams - free bulk endpoint stream IDs. 1883eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1884eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints to remove streams from. 1885eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1886eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1887eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1888eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Reverts a group of bulk endpoints back to not using stream IDs. 1889eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Can fail if we are given bad arguments, or HCD is broken. 1890eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1891eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpvoid usb_free_streams(struct usb_interface *interface, 1892eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1893eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp gfp_t mem_flags) 1894eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1895eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1896eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1897eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1898eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1899eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1900eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1901eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1902eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1903eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1904eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1905eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1906eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) 1907eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1908eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1909eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); 1910eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1911eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_free_streams); 1912eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1913cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1914cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1915cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1916cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1917cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1918cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1919cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1920cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1921cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1922cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1923cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 192632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 192732aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 192832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 192932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 193032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19319b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_RH_RUNNING(hcd)) 193232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 193332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 193432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 193532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 193632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 193732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19389293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 194065bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1942686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1943686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1944686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1946686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 194765bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 19489b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd)) { 19499b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); 19509b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern return 0; 19519b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19529b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern 1953686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1954686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1955686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 19569b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 1957686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1958686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1959686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1960686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1961686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 19629293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1963686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 19649b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_lock_irq(&hcd_root_hub_lock); 19659b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_DEAD(hcd)) { 19669b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 19679b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern hcd->state = old_state; 19689b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19699b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_unlock_irq(&hcd_root_hub_lock); 1970686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 19719293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1972686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 19739293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 197665bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1978686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1979686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1980cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 19811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1982686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 198365bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 19849b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd)) { 19859b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); 19869b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern return 0; 19879b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19880c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 19899293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 19909b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_RH_RUNNING(hcd)) 1991979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1992686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 19939293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1994686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1995bf3d7d40e42a85ca73a34e1385ff34f092a384ebAlan Stern clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 1996686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1997686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1998686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 19999b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_lock_irq(&hcd_root_hub_lock); 20009b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_DEAD(hcd)) { 20019b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern usb_set_device_state(rhdev, rhdev->actconfig 20029b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern ? USB_STATE_CONFIGURED 20039b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern : USB_STATE_ADDRESS); 20049b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 20059b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern hcd->state = HC_STATE_RUNNING; 20069b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 20079b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_unlock_irq(&hcd_root_hub_lock); 2008686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 2009cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 2010686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 20119293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 2012cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 2013cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 20149293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 20159293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20189bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_PM */ 20199bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 20209bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 20219bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 20226b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 20236b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 20246b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 20256b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 20266b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 20276b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 20286b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 20290534d46848990e8eed7cd0832d745d813e827261Alan Stern usb_remote_wakeup(udev); 20306b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 20316b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 20326b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 20351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 20361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 20396b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 20406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 2047ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern if (hcd->rh_registered) { 2048ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 20499bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern queue_work(pm_wq, &hcd->wakeup_work); 2050ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern } 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20539293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20559bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_USB_SUSPEND */ 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 20601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 20681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 20691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 20701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 20711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 20781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 20791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 20801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2092782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21067d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 2109de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 2110de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 21111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2112de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 2113de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 2114de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 2115de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 2116de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 21171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21189b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) { 2119de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2120de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 2121de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2122de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 2123de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 21248de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2125de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 2126de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 2127de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 2128de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 2129de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2130de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 2131de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 213343b86af83da7db8b2c6d85ca970203950e5bad88Dong NguyenEXPORT_SYMBOL_GPL(usb_hcd_irq); 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 21529b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 21539b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_DEAD, &hcd->flags); 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 2155541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 21701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 21711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 21781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 21801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 21821b26da1510c02a2dac33c0ea48904256dcec4617Greg Kroah-Hartman struct device *dev, const char *bus_name) 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21867b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 21891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 21921720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 2197dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 2200d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 2201d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 22029bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 22036b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 22046b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 22053f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp mutex_init(&hcd->bandwidth_mutex); 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2212782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22141720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 22151720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 22161720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 22171720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 22181720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 22191720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 22201720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 22211720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 22221720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 22231720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 22241720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 22251720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 22261720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 2227782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 22281720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 22291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22311720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 22321720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 22331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2234782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 22351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 22371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 22381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 22391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 22401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 22411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 22431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 22441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 22451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 22471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 22481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22498ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 22508ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 22511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 22531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22545234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 22558de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 22568de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2257b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2258b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2259b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2260b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 22611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 22621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 22631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 22641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 22678ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2269b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2270b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2271b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2272b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2273b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 22746d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->self.root_hub = rhdev; 22756b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 22766b403b020c1f42180b14d28d832da61167cff822Sarah Sharp switch (hcd->driver->flags & HCD_MASK) { 22776b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 22786b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 22796b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 22806b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 22816b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 22826b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 22836b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 22846b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 22856b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 22866b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 228796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern goto err_set_rh_speed; 22886b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2289b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2290db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2291db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2292db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2293db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2294db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 2295db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 22969b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is 22979b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern * registered. But since the controller can die at any time, 22989b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern * let's initialize the flag before touching the hardware. 22999b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern */ 23009b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 23019b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern 2302b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2303b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2304b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2305b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2306b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2307b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2308b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 23096d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 1; 2310b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2311fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2312fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2313fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2314b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2315b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2316b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 23171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 2318de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2319de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work as advertised when used together 2320de85422b94ddb23c021126815ea49414047c13dcStefan Becker * with IRQF_SHARED. As usb_hcd_irq() will always disable 2321de85422b94ddb23c021126815ea49414047c13dcStefan Becker * interrupts we can remove it here. 2322de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 232383a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand if (irqflags & IRQF_SHARED) 232483a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand irqflags &= ~IRQF_DISABLED; 2325de85422b94ddb23c021126815ea49414047c13dcStefan Becker 23261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 23271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 2328abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 2329abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp hcd->irq_descr, hcd); 2330abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp if (retval != 0) { 23311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 2332abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp "request interrupt %d failed\n", 2333abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp irqnum); 23348ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 23351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 2337c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 23381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 23391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 23401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 23411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 23421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 23431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 23441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 23451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 23461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 23471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 23481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2350abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp retval = hcd->driver->start(hcd); 2351abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp if (retval < 0) { 23521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 23538ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 23541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2356b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 235755c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2358b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 23598ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 23608ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 23615234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 23625234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 23635234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 23645234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 23655234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 23665234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2367541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) 2368d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 23691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 23701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23715234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 23729b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 237396e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern if (HC_IS_RUNNING(hcd->state)) 237496e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_QUIESCING; 237596e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_lock_irq(&hcd_root_hub_lock); 237696e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->rh_registered = 0; 237796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 237896e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 237996e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#ifdef CONFIG_USB_SUSPEND 238096e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern cancel_work_sync(&hcd->wakeup_work); 238196e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#endif 23825234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 23836d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 23845234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2385b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 23866d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2387541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 23886d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 23898ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 239096e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_HALT; 2391541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 239296e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern del_timer_sync(&hcd->rh_timer); 2393b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 23941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 23951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2396b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2397b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 239896e077ae347912dfce0e93f5958efc3ed6f311f4Alan Sternerr_set_rh_speed: 23996d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 2400b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 24011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2402b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 24031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 24041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 24051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2406782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 24071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 24091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 24101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 24111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 24121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 24131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 24141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 24151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 24161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 24171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24186d88e6792574497bfac9a81403cc47712040636fAlan Stern struct usb_device *rhdev = hcd->self.root_hub; 24196d88e6792574497bfac9a81403cc47712040636fAlan Stern 24201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 24211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24226d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_get_dev(rhdev); 24236d88e6792574497bfac9a81403cc47712040636fAlan Stern sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); 242496e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 24259b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 24261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 24271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 24281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 24301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 24311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 24321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 24339ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 24349bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 2435d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 24366b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 24376b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 24384186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 24396d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 24404186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 24411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24426d88e6792574497bfac9a81403cc47712040636fAlan Stern /* Prevent any more root-hub status calls from the timer. 24436d88e6792574497bfac9a81403cc47712040636fAlan Stern * The HCD might still restart the timer (if a port status change 24446d88e6792574497bfac9a81403cc47712040636fAlan Stern * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke 24456d88e6792574497bfac9a81403cc47712040636fAlan Stern * the hub_status_data() callback. 24466d88e6792574497bfac9a81403cc47712040636fAlan Stern */ 24476d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2448541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 24496d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 24506d88e6792574497bfac9a81403cc47712040636fAlan Stern 24511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 24521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 24531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24546d88e6792574497bfac9a81403cc47712040636fAlan Stern /* In case the HCD restarted the timer, stop it again. */ 2455541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 24561b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 24571b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 24581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 24591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 24606d88e6792574497bfac9a81403cc47712040636fAlan Stern 24616d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 24621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 24631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 24641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2465782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 24661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 246764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 246864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 246964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 247064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 247164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 247264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 247364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 247464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2475782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 247664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 24771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 24781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2479f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 24801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 24821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 24841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 24851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 24861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 24871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 24881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 24891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 24901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 24921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 24931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 24951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 24961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 24981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 24991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 25001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 25011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 25021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 25041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 25071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 25081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 25091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 25111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 25121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 25131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 25141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2515f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2516