11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Linus Torvalds 1999 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Johannes Erdfelt 1999-2001 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Andreas Gal 1999 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Gregory P. Smith 1999 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Deti Fliegl 1999 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Randy Dunlap 2000 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright David Brownell 2000-2002 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * option) any later version. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software Foundation, 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 38b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm#include <asm/unaligned.h> 3964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov#include <linux/platform_device.h> 406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#include <linux/workqueue.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 4327729aadd31dafddaaf64c24f8ef6d0ff750f3aaEric Lescouet#include <linux/usb/hcd.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 839beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 849beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 859beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 869beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 994186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 105809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 106809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 108cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 109cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 114809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 115809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 130d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 131d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 142cd780694920fbf869b23c8afb0bd083e7b0448c7Alan Stern 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ 143d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1597329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16016f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 162667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 163667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18316f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 185667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 186667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29088fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 296d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 297d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 30022c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x1f, 0x00, /* __le16 wTotalLength; */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 33022c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 33122c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 33222c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp /* one SuperSpeed endpoint companion descriptor */ 33322c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x06, /* __u8 ss_bLength */ 33422c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ 33522c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ 33622c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ 33722c6a35d41f71b5b40ba8debcb8bd4e8e291ae43Sarah Sharp 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ 338d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 339d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 340c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger/* authorized_default behaviour: 341c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger * -1 is authorized for all devices except wireless (old behaviour) 342c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger * 0 is unauthorized for all devices 343c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger * 1 is authorized for all devices 344c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger */ 345c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfingerstatic int authorized_default = -1; 346c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfingermodule_param(authorized_default, int, S_IRUGO|S_IWUSR); 347c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel HailfingerMODULE_PARM_DESC(authorized_default, 348c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger "Default USB device authorization: 0 is not authorized, 1 is " 349c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger "authorized, -1 is authorized except for wireless USB (default, " 350c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger "old behaviour"); 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 353392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 354392ca68b401e0797115a08836642faad5778fdb2George Spelvin * ascii2desc() - Helper routine for producing UTF-16LE string descriptors 355392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @s: Null-terminated ASCII (actually ISO-8859-1) string 356392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @buf: Buffer for USB string descriptor (header + UTF-16LE) 357392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: Length (in bytes; may be odd) of descriptor buffer. 358392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 359392ca68b401e0797115a08836642faad5778fdb2George Spelvin * The return value is the number of bytes filled in: 2 + 2*strlen(s) or 360392ca68b401e0797115a08836642faad5778fdb2George Spelvin * buflen, whichever is less. 361392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 362392ca68b401e0797115a08836642faad5778fdb2George Spelvin * USB String descriptors can contain at most 126 characters; input 363392ca68b401e0797115a08836642faad5778fdb2George Spelvin * strings longer than that are truncated. 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 365392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 366392ca68b401e0797115a08836642faad5778fdb2George Spelvinascii2desc(char const *s, u8 *buf, unsigned len) 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 368392ca68b401e0797115a08836642faad5778fdb2George Spelvin unsigned n, t = 2 + 2*strlen(s); 369392ca68b401e0797115a08836642faad5778fdb2George Spelvin 370392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (t > 254) 371392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = 254; /* Longest possible UTF string descriptor */ 372392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > t) 373392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = t; 374392ca68b401e0797115a08836642faad5778fdb2George Spelvin 375392ca68b401e0797115a08836642faad5778fdb2George Spelvin t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ 376392ca68b401e0797115a08836642faad5778fdb2George Spelvin 377392ca68b401e0797115a08836642faad5778fdb2George Spelvin n = len; 378392ca68b401e0797115a08836642faad5778fdb2George Spelvin while (n--) { 379392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t; 380392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (!n--) 381392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 382392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t >> 8; 383392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = (unsigned char)*s++; 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 385392ca68b401e0797115a08836642faad5778fdb2George Spelvin return len; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 388392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 389392ca68b401e0797115a08836642faad5778fdb2George Spelvin * rh_string() - provides string descriptors for root hub 390392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 392392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @data: buffer for output packet 393392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: length of the provided buffer 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 397392ca68b401e0797115a08836642faad5778fdb2George Spelvin * Returns the number of bytes filled in: the length of the descriptor or 398392ca68b401e0797115a08836642faad5778fdb2George Spelvin * of the provided buffer, whichever is less. 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 400392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 401392ca68b401e0797115a08836642faad5778fdb2George Spelvinrh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) 40271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 403392ca68b401e0797115a08836642faad5778fdb2George Spelvin char buf[100]; 404392ca68b401e0797115a08836642faad5778fdb2George Spelvin char const *s; 405392ca68b401e0797115a08836642faad5778fdb2George Spelvin static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 408392ca68b401e0797115a08836642faad5778fdb2George Spelvin switch (id) { 409392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 0: 410392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ 411392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ 412392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > 4) 413392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = 4; 414392ca68b401e0797115a08836642faad5778fdb2George Spelvin memcpy(data, langids, len); 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 416392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 1: 417392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Serial number */ 418392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->self.bus_name; 419392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 420392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 2: 421392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Product name */ 422392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->product_desc; 423392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 424392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 3: 425392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Manufacturer */ 42696b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 42796b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 428392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = buf; 429392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 431392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Can't happen; caller guarantees it */ 432392ca68b401e0797115a08836642faad5778fdb2George Spelvin return 0; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 434392ca68b401e0797115a08836642faad5778fdb2George Spelvin 435392ca68b401e0797115a08836642faad5778fdb2George Spelvin return ascii2desc(s, data, len); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 44548e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp /* 44648e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp * tbuf should be as big as the BOS descriptor and 44748e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp * the USB hub descriptor. 44848e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp */ 44948e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp u8 tbuf[USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE] 45054bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 45271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 453e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4547329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4557329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4579439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4589439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 459e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 460e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 461e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 462e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 463e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 464b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 465e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 480fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 481fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 482fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 483fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 484fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 485fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 486fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 487fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 488fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 489fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 490fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 491fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 492fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 493fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 494fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 495fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 497fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 498fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 505fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 510fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 511fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 512fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 52583de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp switch (hcd->speed) { 5267dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 527d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 5287dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5297dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 5317dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5327dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 5347dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5357dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5377dd19e69d131ea34f74397559b422511e54d2911Viral Mehta } 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5397329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5407329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 54383de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp switch (hcd->speed) { 5447dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 545d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 546d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 5477dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5487dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5517dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5527dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5557dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5567dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5577dd19e69d131ea34f74397559b422511e54d2911Viral Mehta goto error; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 559fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 56371d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 56471d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 56571d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 56671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 56948e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp case USB_DT_BOS << 8: 57048e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp goto nongeneric; 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 60548e8236114c12c5366e032fc517e1bd376369a56Sarah Sharpnongeneric: 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 607b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 608b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 609b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 610b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 611b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 612b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 613b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 614b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 61548e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 61648e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp /* len is returned by hub_control */ 61748e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp break; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 619b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 620b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 621b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 62848e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp if (status < 0) { 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 635b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 63748e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp } else if (status > 0) { 63848e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp /* hub_control may return the length of data copied. */ 63948e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp len = status; 64048e8236114c12c5366e032fc517e1bd376369a56Sarah Sharp status = 0; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6557329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6567329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6577329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6587329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6597329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6607329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6617bf01185c5e9ec19f739f7208646dc2e2cf1904bAman Deep bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT; 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6659439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 666e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6679439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6689439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6699439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6709439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6719439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6729439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6734a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6749439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6759439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6769439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 683d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 684d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 685d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 687d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 688d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 690d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 691d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 692d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 693d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 694d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 695ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches char buffer[6]; /* Any root hubs with > 31 ports? */ 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6976d88e6792574497bfac9a81403cc47712040636fAlan Stern if (unlikely(!hcd->rh_pollable)) 6981b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 699d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 700d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 702d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 703d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 705d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 7069439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 707d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 708d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 709541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 710e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 711e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 712e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 7139439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 714e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7159439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7164a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 7179439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 718e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 719d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 720541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); 721e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7229439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 725d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 72601cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 72701cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 72825985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * fire at the same time to give the CPU a break in between */ 729541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : 730d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 73101cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 733d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 736d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 737d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 738d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 739d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 740d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 741d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 743d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 745d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 74771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 749d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 750e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 751d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 752d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 753e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 754e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 756e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 757e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 758e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 760e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 761e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 762e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 763e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 764e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 765e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 766541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern else if (HCD_POLL_PENDING(hcd)) 767e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 768e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 769e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 770d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 771d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7765e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 777d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7785e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 780d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 785455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 786455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 787d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 788e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 790455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 791e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7939439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 794e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 795e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 796e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 797e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7985e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 799455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 800d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 801d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 802d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 803455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 804d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 805d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 806e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8089439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 8094a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 8109439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 8119439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 8129439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 813e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 8149439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 815e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 8235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 8245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 8265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 8355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 8385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 8405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 8425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 8435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8505234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 8515234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 8525234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 8535234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 8545234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8555234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8565234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8575234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8585234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8595234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8605234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8615234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8625234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8635234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8645234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8655234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8665234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8675234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8685234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8695234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8705234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8715234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8725234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8735234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8745234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8755234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8765234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8775234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 914eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9174186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 919eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 921eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 923eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 924eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 9255a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 9284186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9303099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 932eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 933eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 935eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 936eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 937eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 938eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9584186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9604186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9623099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9688ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9718ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 972b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 973b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 974b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 976b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 979b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9904186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 992551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9954186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9977071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 10047071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10064186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 101469fff59de4d844f8b4c2454c3c23d32b69dcbfd7Alan Stern if (HCD_DEAD(hcd)) 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1059498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1061498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1068782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1079e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1080e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1081e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1082e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1083e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1084e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1085e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1086e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1087e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1088e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1089e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1090e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1091e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1092e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1093e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1094e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1098e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11009a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 110149367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 11029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 11039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 11049f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 11079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 11089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 11099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11116840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 11126840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 11136840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 11146840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 11156840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 11179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 11189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11209b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_RH_RUNNING(hcd)) { 1121eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 11229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 11239b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } else { 11249a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 11259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1128e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 11309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1131e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 11329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1133e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1134e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1135e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1136e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1137e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1138e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1139e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1140e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1141e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1142e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1143e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1144e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1145e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1146e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1147e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1148e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1149e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1150e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1151e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1152e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1162e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1163e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1168eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1169e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1170eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 1171e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1173e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1175e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1176e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1177e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1178e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1179e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1180e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1181e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1182e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1183e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1184e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1185e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1188e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1190e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1192e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12334307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi if (*vaddr_handle == NULL) { 12344307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi WARN_ON_ONCE(1); 12354307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi return -EFAULT; 12364307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi } 12374307a28eb0128417d9a2b9d858d2bce70ee5b383Andrea Righi 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1251b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1252b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1253b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1254b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1255b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1262b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1263b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1264b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1265b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1266b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1267b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1268b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1269b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1270b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1271b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1272b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1273b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1274b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1275b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1276b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1277b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1278c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morellvoid usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) 1279ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern{ 1280ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) 1281ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1282ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->setup_dma, 1283ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1284ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1285ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) 1286ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1287ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->setup_dma, 1288ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern (void **) &urb->setup_packet, 1289ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sizeof(struct usb_ctrlrequest), 1290ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern DMA_TO_DEVICE); 1291ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 12921dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey /* Make it safe to call this routine more than once */ 12931dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); 12941dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey} 1295c8cf203a1d228fa001b95534f639ffb7a23d5386Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); 12961dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 12972694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morellstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12982694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell{ 12992694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell if (hcd->driver->unmap_urb_for_dma) 13002694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell hcd->driver->unmap_urb_for_dma(hcd, urb); 13012694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell else 13022694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell usb_hcd_unmap_urb_for_dma(hcd, urb); 13032694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell} 13042694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell 1305c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morellvoid usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 13061dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey{ 13071dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey enum dma_data_direction dir; 13081dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 1309c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morell usb_hcd_unmap_urb_setup_for_dma(hcd, urb); 13101dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey 1311ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1312ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_flags & URB_DMA_MAP_SG) 1313ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_sg(hcd->self.controller, 1314910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1315ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1316ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1317ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_PAGE) 1318ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_page(hcd->self.controller, 1319ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1320ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1321ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1322ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) 1323ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dma_unmap_single(hcd->self.controller, 1324ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma, 1325ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1326ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1327ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else if (urb->transfer_flags & URB_MAP_LOCAL) 1328ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd_free_coherent(urb->dev->bus, 1329ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_dma, 1330ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern &urb->transfer_buffer, 1331ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1332ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1333ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1334ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern /* Make it safe to call this routine more than once */ 13351dae423dd9b247b048eda00cb598c755e5933213Martin Fuzzey urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | 1336ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); 1337ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern} 1338c8cf203a1d228fa001b95534f639ffb7a23d5386Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); 1339ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern 1340b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1341b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 13429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 13432694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell if (hcd->driver->map_urb_for_dma) 13442694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); 13452694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell else 13462694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); 13472694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell} 13482694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell 13492694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morellint usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 13502694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell gfp_t mem_flags) 13512694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell{ 1352b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1353b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1354b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 13559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 13569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1357e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1358e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1360b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 136185bcb5ee889e0ebb9154718939e049de265fcdfbAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) { 136207a8cdd2bb17a4da68136d963b8bc71959bd31a5Anand Gadiyar if (hcd->self.uses_pio_for_control) 136307a8cdd2bb17a4da68136d963b8bc71959bd31a5Anand Gadiyar return ret; 136485e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1365b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1368b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 137085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (dma_mapping_error(hcd->self.controller, 137185e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->setup_dma)) 137285e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger return -EAGAIN; 1373ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_SINGLE; 1374f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1375b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1376b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1377b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1378b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1379b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1380b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1381ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret) 1382ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern return ret; 1383ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_SETUP_MAP_LOCAL; 1384f537da685c35a81a75f6067751bddb902c8adb68Ming Lei } 1385b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1386b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1387b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1388ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->transfer_buffer_length != 0 1389b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 139085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1391ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (urb->num_sgs) { 1392ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern int n = dma_map_sg( 1393ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1394910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox urb->sg, 1395ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->num_sgs, 1396ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1397ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (n <= 0) 1398ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1399ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1400ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SG; 1401bc677d5b64644c399cd3db6a905453e611f402abClemens Ladisch urb->num_mapped_sgs = n; 1402bc677d5b64644c399cd3db6a905453e611f402abClemens Ladisch if (n != urb->num_sgs) 1403ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= 1404ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_DMA_SG_COMBINED; 1405ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else if (urb->sg) { 1406910f8d0cede74beff1eee93cf9cf2a28d7600e66Matthew Wilcox struct scatterlist *sg = urb->sg; 1407ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_page( 1408ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1409ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg_page(sg), 1410ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern sg->offset, 1411ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1412ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1413ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 141485e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->transfer_dma)) 1415ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1416ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1417ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_PAGE; 1418ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1419ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma = dma_map_single( 1420ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern hcd->self.controller, 1421ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer, 1422ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_buffer_length, 1423ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern dir); 1424ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (dma_mapping_error(hcd->self.controller, 1425ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_dma)) 1426ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern ret = -EAGAIN; 1427ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern else 1428ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_DMA_MAP_SINGLE; 1429ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 143085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1431b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1432b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1433b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1434b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1435b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1436b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1437ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret == 0) 1438ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern urb->transfer_flags |= URB_MAP_LOCAL; 1439b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1440ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | 1441ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern URB_SETUP_MAP_LOCAL))) 1442c8cf203a1d228fa001b95534f639ffb7a23d5386Robert Morell usb_hcd_unmap_urb_for_dma(hcd, urb); 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1444b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 14459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 14462694a48d9007a8bdf1731c1b97d4942c9cc49296Robert MorellEXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 14499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 14519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 14529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 14539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 14549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 14569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 14579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 14589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 14599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 14619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 14629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 14639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 14649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 14659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 14664d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 14679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 14689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 14709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 14719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 14729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 14739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 14749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 14759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1476b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1477ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (is_root_hub(urb->dev)) { 1478e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1479ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } else { 1480ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = map_urb_for_dma(hcd, urb, mem_flags); 1481ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (likely(status == 0)) { 1482ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 1483ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern if (unlikely(status)) 14842694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell unmap_urb_for_dma(hcd, urb); 1485ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 1486ff9c895f07d36193c75533bda8193bde8ca99d02Alan Stern } 14879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 1490b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 14919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 14929a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 14934d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 149449367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 14959a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 14969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1508e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1512809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1513e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1519e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1530a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1533cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1534cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1536cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1537cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1538cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1539cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1540cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1541cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1542cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1543cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1544cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1545cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1546cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1547cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1548cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1549cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1550cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1551cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1555e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 15569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 15579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 156332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 156432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 156532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 156632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 15674a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 156832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 156932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 157032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 157132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 157232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 157332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 157432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1575eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 15764a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1577eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1578eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 157932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 15804a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 158132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1582b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1583eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 15844a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1585eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1586b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 15874a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 15884a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 158932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 15902694a48d9007a8bdf1731c1b97d4942c9cc49296Robert Morell unmap_urb_for_dma(hcd, urb); 15914a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 15921f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 15931f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 159432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 15954a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 159632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 159732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 159849367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 159932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 160032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 160132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1602782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 160332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 160432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 160532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 160695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 160795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 160895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 161095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1611a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 161695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 161795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 16189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 16191720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 162195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 16229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1623ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 16255e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1627eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 16305e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1631809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1633e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1634e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1635e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1636e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1637e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1638e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1639e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1640e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1641e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1642e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1643e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1644e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1645e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1646e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1647e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1648e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1649e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1650e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1651e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1652e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1656ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 166195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1662455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1663809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1664455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1665455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1666455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1667455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1668455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1669455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1670455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1671455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1672809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1673455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1674455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1675455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1676455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1677455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1678455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16813f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp/** 168270445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds 168370445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * the bus bandwidth 168470445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * @udev: target &usb_device 16853f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_config: new configuration to install 16863f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @cur_alt: the current alternate interface setting 16873f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_alt: alternate interface setting that is being installed 16883f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16893f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change configurations, pass in the new configuration in new_config, 16903f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass NULL for cur_alt and new_alt. 16913f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16923f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To reset a device's configuration (put the device in the ADDRESSED state), 16933f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in NULL for new_config, cur_alt, and new_alt. 16943f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16953f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change alternate interface settings, pass in NULL for new_config, 16963f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in the current alternate interface setting in cur_alt, 16973f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass in the new alternate interface setting in new_alt. 16983f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16993f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * Returns an error if the requested bandwidth change exceeds the 17003f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * bus bandwidth or host controller internal resources. 170179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 17023f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharpint usb_hcd_alloc_bandwidth(struct usb_device *udev, 170379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 17043f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *cur_alt, 17053f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *new_alt) 170679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 170779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 1708576a362ad2103da481e1f6e13de01f33d3d4c7b1H Hartley Sweeten struct usb_host_interface *alt = NULL; 170979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 171079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 171179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 171279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 171379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 171479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 171579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 171679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 171779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 17183f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!new_config && !cur_alt) { 171979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 172079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 172179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 172279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 172379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 172479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 172579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 172679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 172779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 172879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 172979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 173079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 173179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 173279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 173379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 173479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 173579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 173679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 173779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 173879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 173979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 174079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 174179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 174279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 174379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 174479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 174579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 174679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 174779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 174879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 174979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 175079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 175179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 175279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 175379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 175479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 1755d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp struct usb_host_interface *first_alt; 1756d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp int iface_num; 1757d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp 1758d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp first_alt = &new_config->intf_cache[i]->altsetting[0]; 1759d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp iface_num = first_alt->desc.bInterfaceNumber; 176091017f9cf5fcfb601b8d583c896ac7de7d200c57Sarah Sharp /* Set up endpoints for alternate interface setting 0 */ 1761d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = usb_find_alt_setting(new_config, iface_num, 0); 17623f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!alt) 17633f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* No alt setting 0? Pick the first setting. */ 1764d837e219daf3bf0cc84fcfb9781807d9fe8d03b5Sarah Sharp alt = first_alt; 17653f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp 176679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 176779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 176879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 176979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 177079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 177179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 177279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 17733f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (cur_alt && new_alt) { 177404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp struct usb_interface *iface = usb_ifnum_to_if(udev, 177504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt->desc.bInterfaceNumber); 177604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 17778a9af4fdf6d5eeb3200a088354d266a87e8260b0Sarah Sharp if (!iface) 17788a9af4fdf6d5eeb3200a088354d266a87e8260b0Sarah Sharp return -EINVAL; 177904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (iface->resetting_device) { 178004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp /* 178104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * The USB core just reset the device, so the xHCI host 178204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * and the device will think alt setting 0 is installed. 178304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * However, the USB core will pass in the alternate 178404a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting installed before the reset as cur_alt. Dig 178504a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * out the alternate setting 0 structure, or the first 178604a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * alternate setting if a broken device doesn't have alt 178704a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp * setting 0. 178804a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp */ 178904a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = usb_altnum_to_altsetting(iface, 0); 179004a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp if (!cur_alt) 179104a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp cur_alt = &iface->altsetting[0]; 179204a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp } 179304a723ea9c53ba608b0411aa36948bb57c51a08eSarah Sharp 17943f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Drop all the endpoints in the current alt setting */ 17953f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { 17963f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, 17973f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &cur_alt->endpoint[i]); 17983f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 17993f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 18003f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 18013f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Add all the endpoints in the new alt setting */ 18023f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { 18033f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, 18043f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &new_alt->endpoint[i]); 18053f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 18063f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 18073f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 18083f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 180979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 181079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 181179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 181279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 181379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 181479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 181579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 181695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 181795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 181895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 181995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 182095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 182195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 182295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 182395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 182495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 182595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 182695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 182795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 182895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 182995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 183095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 183195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 183295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 183395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 183495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 18353444b26afa145148951112534f298bdc554ec789David Vrabel/** 18363444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 18373444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 18383444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 18393444b26afa145148951112534f298bdc554ec789David Vrabel * 18403444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 18413444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 18423444b26afa145148951112534f298bdc554ec789David Vrabel */ 18433444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 18443444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 18453444b26afa145148951112534f298bdc554ec789David Vrabel{ 18463444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 18473444b26afa145148951112534f298bdc554ec789David Vrabel 18483444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 18493444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 18503444b26afa145148951112534f298bdc554ec789David Vrabel else { 18513444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 18523444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 18533444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 18543444b26afa145148951112534f298bdc554ec789David Vrabel 18553444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 18563444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 18573444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 18583444b26afa145148951112534f298bdc554ec789David Vrabel } 18593444b26afa145148951112534f298bdc554ec789David Vrabel} 18603444b26afa145148951112534f298bdc554ec789David Vrabel 1861eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1862eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_alloc_streams - allocate bulk endpoint stream IDs. 1863eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1864eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints that need streams. 1865eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1866eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_streams: number of streams to allocate. 1867eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1868eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1869eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Sets up a group of bulk endpoints to have num_streams stream IDs available. 1870eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Drivers may queue multiple transfers to different stream IDs, which may 1871eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * complete in a different order than they were queued. 1872eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1873eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpint usb_alloc_streams(struct usb_interface *interface, 1874eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1875eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp unsigned int num_streams, gfp_t mem_flags) 1876eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1877eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1878eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1879eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1880eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1881eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1882eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1883eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) 1884eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1885eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1886eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1887eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1888eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1889eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1890eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) 1891eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return -EINVAL; 1892eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1893eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, 1894eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp num_streams, mem_flags); 1895eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1896eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_alloc_streams); 1897eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1898eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp/** 1899eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * usb_free_streams - free bulk endpoint stream IDs. 1900eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @interface: alternate setting that includes all endpoints. 1901eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @eps: array of endpoints to remove streams from. 1902eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @num_eps: number of endpoints in the array. 1903eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * @mem_flags: flags hcd should use to allocate memory. 1904eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * 1905eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Reverts a group of bulk endpoints back to not using stream IDs. 1906eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp * Can fail if we are given bad arguments, or HCD is broken. 1907eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp */ 1908eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharpvoid usb_free_streams(struct usb_interface *interface, 1909eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_host_endpoint **eps, unsigned int num_eps, 1910eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp gfp_t mem_flags) 1911eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp{ 1912eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_hcd *hcd; 1913eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp struct usb_device *dev; 1914eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp int i; 1915eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1916eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp dev = interface_to_usbdev(interface); 1917eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd = bus_to_hcd(dev->bus); 1918eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp if (dev->speed != USB_SPEED_SUPER) 1919eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1920eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1921eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp /* Streams only apply to bulk endpoints. */ 1922eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp for (i = 0; i < num_eps; i++) 1923b214f191d95ba4b5a35aebd69cd129cf7e3b1884Matthew Wilcox if (!eps[i] || !usb_endpoint_xfer_bulk(&eps[i]->desc)) 1924eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp return; 1925eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1926eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); 1927eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp} 1928eab1cafc3b524b714b0567ab98fc75ace09db98cSarah SharpEXPORT_SYMBOL_GPL(usb_free_streams); 1929eab1cafc3b524b714b0567ab98fc75ace09db98cSarah Sharp 1930cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1931cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1932cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1933cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1934cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1935cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1936cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1937cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1938cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1939cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1940cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 194332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 194432aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 194532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 194632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 194732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19489b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_RH_RUNNING(hcd)) 194932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 195032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 195132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 195232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 195332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 195432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 19559293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 195765bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 19581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1959686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1960686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1961686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 19621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 196330b1a7a32ca48fd8758f8ca44d60deebc0aa3d72Alan Stern dev_dbg(&rhdev->dev, "bus %ssuspend, wakeup %d\n", 196430b1a7a32ca48fd8758f8ca44d60deebc0aa3d72Alan Stern (PMSG_IS_AUTO(msg) ? "auto-" : ""), 196530b1a7a32ca48fd8758f8ca44d60deebc0aa3d72Alan Stern rhdev->do_remote_wakeup); 19669b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd)) { 19679b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); 19689b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern return 0; 19699b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19709b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern 1971686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1972686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1973686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 19749b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 1975686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1976686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1977686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1978686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1979686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 19809293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1981879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern 1982879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern /* Did we race with a root-hub wakeup event? */ 1983879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern if (rhdev->do_remote_wakeup) { 1984879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern char buffer[6]; 1985879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern 1986879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern status = hcd->driver->hub_status_data(hcd, buffer); 1987879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern if (status != 0) { 1988879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern dev_dbg(&rhdev->dev, "suspend raced with wakeup event\n"); 1989879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern hcd_bus_resume(rhdev, PMSG_AUTO_RESUME); 1990879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern status = -EBUSY; 1991879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern } 1992879d38e6bc36d73b0ac40ec9b0d839fda9fa8b1aAlan Stern } 1993686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 19949b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_lock_irq(&hcd_root_hub_lock); 19959b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_DEAD(hcd)) { 19969b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 19979b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern hcd->state = old_state; 19989b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 19999b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_unlock_irq(&hcd_root_hub_lock); 2000686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 20019293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 2002686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 20039293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 200665bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2008686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 2009686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 2010cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201230b1a7a32ca48fd8758f8ca44d60deebc0aa3d72Alan Stern dev_dbg(&rhdev->dev, "usb %sresume\n", 201330b1a7a32ca48fd8758f8ca44d60deebc0aa3d72Alan Stern (PMSG_IS_AUTO(msg) ? "auto-" : "")); 20149b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_DEAD(hcd)) { 20159b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); 20169b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern return 0; 20179b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 20180c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 20199293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 20209b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (HCD_RH_RUNNING(hcd)) 2021979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 2022686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 20239293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 2024686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 2025bf3d7d40e42a85ca73a34e1385ff34f092a384ebAlan Stern clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 2026686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 2027686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 2028686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 20299b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_lock_irq(&hcd_root_hub_lock); 20309b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern if (!HCD_DEAD(hcd)) { 20319b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern usb_set_device_state(rhdev, rhdev->actconfig 20329b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern ? USB_STATE_CONFIGURED 20339b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern : USB_STATE_ADDRESS); 20349b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 20359b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern hcd->state = HC_STATE_RUNNING; 20369b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern } 20379b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern spin_unlock_irq(&hcd_root_hub_lock); 2038686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 2039cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 2040686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 20419293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 2042cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 2043cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 20449293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 20459293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20489bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_PM */ 20499bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 20509bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 20519bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern 20526b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 20536b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 20546b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 20556b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 20566b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 20576b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 20586b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 20590534d46848990e8eed7cd0832d745d813e827261Alan Stern usb_remote_wakeup(udev); 20606b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 20616b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 20626b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 20681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 20696b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 20706b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 20711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 2077ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern if (hcd->rh_registered) { 2078ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); 20799bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern queue_work(pm_wq, &hcd->wakeup_work); 2080ff2f07874362d34684296f2bd5547a099f33c6d4Alan Stern } 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20839293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20859bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#endif /* CONFIG_USB_SUSPEND */ 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 21101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 21141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 21161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 21171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 21191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 21201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 21211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2122782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 21251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 21301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 21311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21367d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 2139de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 2140de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2142de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 2143de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 2144de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 2145de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 2146de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2148968b822c0023861ef6e4e15bb68582b36e89ad29Alan Stern if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) 2149de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2150968b822c0023861ef6e4e15bb68582b36e89ad29Alan Stern else if (hcd->driver->irq(hcd) == IRQ_NONE) 2151de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 2152968b822c0023861ef6e4e15bb68582b36e89ad29Alan Stern else 2153de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 2154de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2155de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 2156de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 215843b86af83da7db8b2c6d85ca970203950e5bad88Dong NguyenEXPORT_SYMBOL_GPL(usb_hcd_irq); 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 21671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 2168c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * by the PCI glue, so only glue for non-PCI busses should need to call it. 2169c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2170c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Only call this function with the primary HCD. 21711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 21751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 21799b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 21809b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_DEAD, &hcd->flags); 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 2182541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 21861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2189c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { 2190c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd = hcd->shared_hcd; 2191c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (hcd->rh_registered) { 2192c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 2193c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp 2194c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp /* make khubd clean up old urbs and devices */ 2195c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp usb_set_device_state(hcd->self.root_hub, 2196c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp USB_STATE_NOTATTACHED); 2197c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp usb_kick_khubd(hcd->self.root_hub); 2198c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 2199c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 2201c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp /* Make sure that the other roothub is also deallocated. */ 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 2208c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * usb_create_shared_hcd - create and initialize an HCD structure 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 2212c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @primary_hcd: a pointer to the usb_hcd structure that is sharing the 2213c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * PCI device. Only allocate certain resources for the primary HCD 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 22171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 22181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 22191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2222c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharpstruct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, 2223c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp struct device *dev, const char *bus_name, 2224c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp struct usb_hcd *primary_hcd) 22251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 22271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22287b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 22291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 22311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 22321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2233c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (primary_hcd == NULL) { 2234c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), 2235c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp GFP_KERNEL); 2236c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (!hcd->bandwidth_mutex) { 2237c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp kfree(hcd); 2238c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); 2239c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return NULL; 2240c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 2241c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp mutex_init(hcd->bandwidth_mutex); 2242c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp dev_set_drvdata(dev, hcd); 2243c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } else { 2244c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; 2245c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->primary_hcd = primary_hcd; 2246c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp primary_hcd->primary_hcd = primary_hcd; 2247c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->shared_hcd = primary_hcd; 2248c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp primary_hcd->shared_hcd = hcd; 2249d673bfcbfffdeb56064a6b1ee047b85590bed76cSarah Sharp } 2250d673bfcbfffdeb56064a6b1ee047b85590bed76cSarah Sharp 22511720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 22541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 22551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 2256dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 22571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 2259d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 2260d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 22619bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 22626b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 22636b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 22641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 226683de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp hcd->speed = driver->flags & HCD_MASK; 22671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 22691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 22701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2271c56354378426e550aaf6ddf3983f502a8fddeab5Sarah SharpEXPORT_SYMBOL_GPL(usb_create_shared_hcd); 2272c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp 2273c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp/** 2274c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * usb_create_hcd - create and initialize an HCD structure 2275c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @driver: HC driver that will use this hcd 2276c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @dev: device for this HC, stored in hcd->self.controller 2277c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * @bus_name: value to store in hcd->self.bus_name 2278c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Context: !in_interrupt() 2279c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2280c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Allocate a struct usb_hcd, with extra space at the end for the 2281c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * HC driver's private data. Initialize the generic members of the 2282c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * hcd structure. 2283c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2284c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * If memory is unavailable, returns NULL. 2285c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp */ 2286c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharpstruct usb_hcd *usb_create_hcd(const struct hc_driver *driver, 2287c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp struct device *dev, const char *bus_name) 2288c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp{ 2289c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return usb_create_shared_hcd(driver, dev, bus_name, NULL); 2290c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp} 2291782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 22921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2293c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp/* 2294c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Roothubs that share one PCI device must also share the bandwidth mutex. 2295c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is 2296c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * deallocated. 2297c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * 2298c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * Make sure to only deallocate the bandwidth_mutex when the primary HCD is 2299c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * freed. When hcd_release() is called for the non-primary HCD, set the 2300c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * primary_hcd's shared_hcd pointer to null (since the non-primary HCD will be 2301c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp * freed shortly). 2302c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp */ 23031720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 23041720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 23051720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 23061720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 2307c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd)) 2308c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp kfree(hcd->bandwidth_mutex); 2309c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp else 2310c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp hcd->shared_hcd->shared_hcd = NULL; 23111720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 23121720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 23131720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 23141720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 23151720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 23161720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 23171720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 23181720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 23191720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 2320782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 23211720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 23221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 23231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23241720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 23251720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 23261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2327782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 23281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2329c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharpint usb_hcd_is_primary_hcd(struct usb_hcd *hcd) 2330c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp{ 2331c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (!hcd->primary_hcd) 2332c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return 1; 2333c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp return hcd == hcd->primary_hcd; 2334c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp} 2335c56354378426e550aaf6ddf3983f502a8fddeab5Sarah SharpEXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); 2336c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp 233723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharpstatic int usb_hcd_request_irqs(struct usb_hcd *hcd, 233823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp unsigned int irqnum, unsigned long irqflags) 233923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp{ 234023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp int retval; 234123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 234223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (hcd->driver->irq) { 234323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 234423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp /* IRQF_DISABLED doesn't work as advertised when used together 234523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp * with IRQF_SHARED. As usb_hcd_irq() will always disable 234623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp * interrupts we can remove it here. 234723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp */ 234823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (irqflags & IRQF_SHARED) 234923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp irqflags &= ~IRQF_DISABLED; 235023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 235123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 235223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->driver->description, hcd->self.busnum); 235323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 235423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->irq_descr, hcd); 235523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (retval != 0) { 235623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp dev_err(hcd->self.controller, 235723e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp "request interrupt %d failed\n", 235823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp irqnum); 235923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp return retval; 236023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp } 236123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp hcd->irq = irqnum; 236223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 236323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (hcd->driver->flags & HCD_MEMORY) ? 236423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp "io mem" : "io base", 236523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (unsigned long long)hcd->rsrc_start); 236623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp } else { 2367cd70469d084fde198dc07c1a31b8463562228a5aFelipe Balbi hcd->irq = 0; 236823e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp if (hcd->rsrc_start) 236923e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp dev_info(hcd->self.controller, "%s 0x%08llx\n", 237023e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (hcd->driver->flags & HCD_MEMORY) ? 237123e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp "io mem" : "io base", 237223e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp (unsigned long long)hcd->rsrc_start); 237323e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp } 237423e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp return 0; 237523e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp} 237623e0d1066f429ab44305e96fbff13f1793886277Sarah Sharp 23771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 23781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 23791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 23801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 23811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 23821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 23831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 23841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 23851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 23861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 23871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 23881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 23891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23908ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 23918ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 23921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 23941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2395c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger /* Keep old behaviour if authorized_default is not in [0, 1]. */ 2396c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger if (authorized_default < 0 || authorized_default > 1) 2397c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger hcd->authorized_default = hcd->wireless? 0 : 1; 2398c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger else 2399c4fc2342cb611f945fa468e742759e25984005adCarl-Daniel Hailfinger hcd->authorized_default = authorized_default; 24008de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 24018de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2402b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2403b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2404b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2405b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 24061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 24071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 24081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 24091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 24128ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 24131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2414b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2415b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2416b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2417b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2418b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 24196d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->self.root_hub = rhdev; 24206b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 242183de4b2b90887b5b317d8313864fe4cc5db35280Sarah Sharp switch (hcd->speed) { 24226b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 24236b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 24246b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 24256b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 24266b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 24276b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 24286b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 24296b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 24306b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 24316b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 24321d15ee4cd7c9ddacfb4b517131b257d8c0d74d42Sebastian Andrzej Siewior retval = -EINVAL; 243396e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern goto err_set_rh_speed; 24346b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2435b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2436db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2437db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2438db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2439db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2440a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern device_set_wakeup_capable(&rhdev->dev, 1); 2441db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 24429b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is 24439b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern * registered. But since the controller can die at any time, 24449b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern * let's initialize the flag before touching the hardware. 24459b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern */ 24469b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 24479b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern 2448b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2449b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2450b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2451b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2452b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2453b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2454b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 24556d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 1; 2456b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2457fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2458fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2459fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2460b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2461b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 246268d07f64b8a11a852d48d1b05b724c3e20c0d94bSarah Sharp /* enable irqs just before we start the controller, 246368d07f64b8a11a852d48d1b05b724c3e20c0d94bSarah Sharp * if the BIOS provides legacy PCI irqs. 246468d07f64b8a11a852d48d1b05b724c3e20c0d94bSarah Sharp */ 246568d07f64b8a11a852d48d1b05b724c3e20c0d94bSarah Sharp if (usb_hcd_is_primary_hcd(hcd) && irqnum) { 2466c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); 2467c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (retval) 2468c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp goto err_request_irq; 2469c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 24701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24714814030ce11f08350b7a91573487ad4b600dae34Sarah Sharp hcd->state = HC_STATE_RUNNING; 2472abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp retval = hcd->driver->start(hcd); 2473abc4f9b099e9e7db3f6f945210aee125571c236dSarah Sharp if (retval < 0) { 24741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 24758ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 24761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2478b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 247955c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2480b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 24818ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 24828ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 24835234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 24845234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 24855234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 24865234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 24875234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 24885234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2489541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) 2490d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 2491a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern 2492a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern /* 2493a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern * Host controllers don't generate their own wakeup requests; 2494a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern * they only forward requests from the root hub. Therefore 2495a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern * controllers should always be enabled for remote wakeup. 2496a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern */ 2497a6eeeb9f45b5a417f574f3bc799b7122270bf59bAlan Stern device_wakeup_enable(hcd->self.controller); 24981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 24991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 25019b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 250296e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern if (HC_IS_RUNNING(hcd->state)) 250396e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_QUIESCING; 250496e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_lock_irq(&hcd_root_hub_lock); 250596e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->rh_registered = 0; 250696e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 250796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 250896e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#ifdef CONFIG_USB_SUSPEND 250996e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern cancel_work_sync(&hcd->wakeup_work); 251096e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern#endif 25115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 25126d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 25135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2514b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 25156d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2516541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 25176d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 25188ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 251996e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern hcd->state = HC_STATE_HALT; 2520541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 252196e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern del_timer_sync(&hcd->rh_timer); 2522b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 2523cd70469d084fde198dc07c1a31b8463562228a5aFelipe Balbi if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) 25241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2525b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2526b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 252796e077ae347912dfce0e93f5958efc3ed6f311f4Alan Sternerr_set_rh_speed: 25286d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 2529b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 25301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2531b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 25321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 25331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 25341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2535782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 25361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 25381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 25391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 25401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 25411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 25421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 25431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 25441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 25451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 25461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25476d88e6792574497bfac9a81403cc47712040636fAlan Stern struct usb_device *rhdev = hcd->self.root_hub; 25486d88e6792574497bfac9a81403cc47712040636fAlan Stern 25491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 25501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25516d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_get_dev(rhdev); 25526d88e6792574497bfac9a81403cc47712040636fAlan Stern sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); 255396e077ae347912dfce0e93f5958efc3ed6f311f4Alan Stern 25549b37596a2e860404503a3f2a6513db60c296bfdcAlan Stern clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); 25551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 25561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 25571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 25591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 25601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 25611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 25629ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 25639bbdf1e0afe771ca7650f9f476769310bee9d8f3Alan Stern#ifdef CONFIG_USB_SUSPEND 2564d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 25656b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 25666b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 25674186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 25686d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_disconnect(&rhdev); /* Sets rhdev to NULL */ 25694186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 25701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25716d88e6792574497bfac9a81403cc47712040636fAlan Stern /* Prevent any more root-hub status calls from the timer. 25726d88e6792574497bfac9a81403cc47712040636fAlan Stern * The HCD might still restart the timer (if a port status change 25736d88e6792574497bfac9a81403cc47712040636fAlan Stern * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke 25746d88e6792574497bfac9a81403cc47712040636fAlan Stern * the hub_status_data() callback. 25756d88e6792574497bfac9a81403cc47712040636fAlan Stern */ 25766d88e6792574497bfac9a81403cc47712040636fAlan Stern hcd->rh_pollable = 0; 2577541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 25786d88e6792574497bfac9a81403cc47712040636fAlan Stern del_timer_sync(&hcd->rh_timer); 25796d88e6792574497bfac9a81403cc47712040636fAlan Stern 25801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 25811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 25821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25836d88e6792574497bfac9a81403cc47712040636fAlan Stern /* In case the HCD restarted the timer, stop it again. */ 2584541c7d432f76771079e7c295d596ea47cc6a3030Alan Stern clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); 25851b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 25861b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 2587c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp if (usb_hcd_is_primary_hcd(hcd)) { 2588cd70469d084fde198dc07c1a31b8463562228a5aFelipe Balbi if (hcd->irq > 0) 2589c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp free_irq(hcd->irq, hcd); 2590c56354378426e550aaf6ddf3983f502a8fddeab5Sarah Sharp } 25916d88e6792574497bfac9a81403cc47712040636fAlan Stern 25926d88e6792574497bfac9a81403cc47712040636fAlan Stern usb_put_dev(hcd->self.root_hub); 25931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 25941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 25951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2596782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 25971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 259864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 259964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 260064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 260164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 260264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 260364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 260464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 260564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2606782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 260764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 26081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 26091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2610f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 26111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 26131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 26151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 26161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 26171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 26181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 26191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 26201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 26211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 26231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 26261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 26271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 26291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 26301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 26311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 26321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 26331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 26351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 26381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 26391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 26401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 26421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 26431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 26441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 26451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2646f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2647