hcd.c revision 7dd19e69d131ea34f74397559b422511e54d2911
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Linus Torvalds 1999 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Johannes Erdfelt 1999-2001 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Andreas Gal 1999 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Gregory P. Smith 1999 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Deti Fliegl 1999 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright Randy Dunlap 2000 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (C) Copyright David Brownell 2000-2002 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * option) any later version. 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for more details. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * along with this program; if not, write to the Free Software Foundation, 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/version.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dma-mapping.h> 354186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/byteorder.h> 38b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm#include <asm/unaligned.h> 3964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov#include <linux/platform_device.h> 406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#include <linux/workqueue.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 849beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 859beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 869beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 879beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 1004186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 106809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 107809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 109cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 111cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 115809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 119809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 131d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 142d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 143d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 151d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1607329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16116f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 163667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 164667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18416f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 186667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 187667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29388fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 297d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 300d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x19, 0x00, /* __le16 wTotalLength; FIXME */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 330d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 331d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 332d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* 333d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * All 3.0 hubs should have an endpoint companion descriptor, 334d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * but we're ignoring that for now. FIXME? 335d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp */ 336d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 337d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 34471d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluinstatic unsigned ascii2utf(char *s, u8 *utf, int utfmax) 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned retval; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 36971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluinstatic unsigned rh_string(int id, struct usb_hcd *hcd, u8 *data, unsigned len) 37071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 37771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin len = min_t(unsigned, len, 4); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 39196b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 39296b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 39371d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin } 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 41554bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 41654bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 41871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 419e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4207329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4217329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4239439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4249439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 425e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 426e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 427e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 428e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 429e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 430b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 431e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 446fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 447fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 448fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 449fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 450fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 451fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 452fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 453fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 454fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 455fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 456fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 457fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 458fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 459fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 460fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 461fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 463fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 464fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 471fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 476fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 477fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 478fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 4917dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 4927dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 493d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 4947dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 4957dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4977dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 4987dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 5007dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5017dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5037dd19e69d131ea34f74397559b422511e54d2911Viral Mehta } 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5057329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5067329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 5097dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5107dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 511d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 512d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 5137dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5147dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5177dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5187dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5217dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5227dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5237dd19e69d131ea34f74397559b422511e54d2911Viral Mehta goto error; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 525fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 52971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 53071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 53171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 53271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 570b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 571b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 572b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 573b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 574b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 575b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 576b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 577b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 579b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 580b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 581b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 595b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6117329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6127329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6137329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6147329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6157329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6167329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6177329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6219439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 622e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6239439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6249439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6259439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6269439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6279439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6289439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6294a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6309439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6319439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6329439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 639d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 640d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 641d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 643d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 644d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 646d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 647d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 648d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 649d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 650d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 651d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6531b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern if (unlikely(!hcd->rh_registered)) 6541b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 655d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 656d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 659d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 661d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 6629439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 663d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 664d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 665e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->poll_pending = 0; 666e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 667e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 668e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 6699439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 670e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6719439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6724a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 6739439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 674e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 675d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 676d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 677e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6789439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 68201cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 68301cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 68401cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 685d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 686d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 68701cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 689d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 692d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 693d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 694d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 695d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 696d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 697d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 699d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 701d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 70371d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 705d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 706e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 707d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 708d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 709e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 710e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 712e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 713e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 714e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 716e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 717e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 718e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 719e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 720e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 721e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 722e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (hcd->poll_pending) 723e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 724e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 725e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 726d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 727d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7325e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 733d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7345e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 736d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 742455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 743d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 744e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 746455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 747e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7499439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 750e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 751e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 752e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 753e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7545e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 755455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 756d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 757d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 758d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 759455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 760d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 761d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 762e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7649439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7654a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 7669439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 7679439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 7689439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 769e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 7709439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 771e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7745234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7755234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7765234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 7775234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7785234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7795234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7805234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7815234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 7825234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7835234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7845234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7855234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7865234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7875234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7885234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7895234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7905234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 7915234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 7945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 7965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 7985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 7995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 8075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 8085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 8095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 8105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 870eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8734186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 875eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 877eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 879eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 880eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 8815a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 8844186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8863099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 888eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 889eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 891eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 892eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 893eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 894eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9144186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9164186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9183099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9248ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9278ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 928b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 929b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 930b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 932b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 935b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9464186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 948551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9514186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9537071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9607071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9624186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1015498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1017498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1024782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1035e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1036e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1037e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1038e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1039e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1040e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1041e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1042e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1043e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1044e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1045e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1046e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1047e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1048e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1049e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1050e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 105749367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10609f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10676840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10686840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10696840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10706840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10716840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1079eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 10849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1087e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 10889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 10899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1090e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 10919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1092e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1093e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1094e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1095e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1096e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1097e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1098e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1099e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1100e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1101e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1102e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1103e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1104e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1105e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1106e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1107e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1108e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1109e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1110e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11189a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11199a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11209a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1121e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1122e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11249a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1127eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1128e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1129eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 11329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 11339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 11349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 11359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) && 11379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern !is_root_hub(urb->dev)) { 11389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 11399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 11409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 11419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1143e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1145e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1147e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1148e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1149e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1150e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1151e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1152e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1153e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1154e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1155e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1156e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1157e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1160e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1162e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1164e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1166b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1167b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1168b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1169b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1170b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1171b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1172b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1173b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1174b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1175b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1176b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1177b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1178b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1179b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1180b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1181b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1182b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1183b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1236b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 12479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 12529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1253e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1254e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 1262b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1265b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 1267b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1268b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1269b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1270b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1271b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1272b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1273b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1274b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1275b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1276b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1277b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret == 0 && urb->transfer_buffer_length != 0 1278b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1279b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 1284b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1285b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1286b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1287b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1288b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1289b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1290b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1291b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1292b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1293b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret && usb_endpoint_xfer_control(&urb->ep->desc) 1294b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 1295b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, 1296b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1297b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1298b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1299b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1300b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1302b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 13039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 13069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1307b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1308b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1309b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1310b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return; 1311b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1312b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1313b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1314b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 13159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, urb->setup_dma, 13169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern sizeof(struct usb_ctrlrequest), 13179a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern DMA_TO_DEVICE); 1318b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1319b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->setup_dma, 1320b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1321b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1322b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1323b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1324b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1325b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1326b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (urb->transfer_buffer_length != 0 1327b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1328b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 13299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, 13309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_dma, 13319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_buffer_length, 1332b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1333b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1334b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->transfer_dma, 1335b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1336b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1337b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 13389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 13399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 13409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 13429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 13449a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 13459a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 13469a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 13479a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13489a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 13499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 13509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 13519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 13529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 13549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 13559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 13569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 13589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 13594d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 13609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 13619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 13639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 13649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 13659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 13669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 13679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 13689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1369b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm status = map_urb_for_dma(hcd, urb, mem_flags); 1370b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (unlikely(status)) { 1371b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm usbmon_urb_submit_error(&hcd->self, urb, status); 1372b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm goto error; 1373b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1374b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1375e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (is_root_hub(urb->dev)) 1376e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1377e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else 1378e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 13799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 13829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 1383b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm error: 1384b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 13859a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 13869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 13874d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 138849367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 13899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 13909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1402e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1406809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1407e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1413e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1424a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14269a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1427cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1428cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1430cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1431cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1432cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1433cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1434cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1435cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1436cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1437cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1438cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1439cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1440cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1441cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1442cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1443cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1444cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1445cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1449e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 14509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 14519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 145732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 145832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 145932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 146032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 14614a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 146232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 146332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 146432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 146532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 146632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 146732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 146832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1469eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 14704a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1471eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1472eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 147332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 14744a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 147532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1476b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1477eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 14784a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1479eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1480b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 14814a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 14824a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 148332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 14841f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern unmap_urb_for_dma(hcd, urb); 14854a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 14861f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 14871f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 148832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 14894a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 149032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 149132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 149249367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 149332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 149432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 149532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1496782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 149732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 149832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 149932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 150095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 150195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 150295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 150495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1505a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 151095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 151195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 15129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 15131720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 151595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 15169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1517ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 15195e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 15245e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1525809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1527e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1528e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1529e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1530e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1531e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1532e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1533e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1534e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1535e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1536e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1537e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1538e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1539e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1540e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1541e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1542e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1543e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1544e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1545e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1546e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1550ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 155595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1556455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1557809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1558455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1559455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1560455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1561455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1562455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1563455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1564455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1565455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1566809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1567455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1568455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1569455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1570455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1571455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1572455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 157579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp/* Check whether a new configuration or alt setting for an interface 157679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * will exceed the bandwidth for the bus (or the host controller resources). 157779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * Only pass in a non-NULL config or interface, not both! 157879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * Passing NULL for both new_config and new_intf means the device will be 157979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * de-configured by issuing a set configuration 0 command. 158079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 158179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpint usb_hcd_check_bandwidth(struct usb_device *udev, 158279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 158379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_interface *new_intf) 158479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 158579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 158679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_interface_cache *intf_cache; 158779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_interface *alt = 0; 158879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 158979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 159079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 159179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 159279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 159379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 159479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 159579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 159679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 159779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!new_config && !new_intf) { 159879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 159979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 160079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 160179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 160279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 160379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 160479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 160579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 160679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 160779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 160879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 160979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 161079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 161179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 161279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 161379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 161479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 161579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 161679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 161779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 161879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 161979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 162079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 162179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 162279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 162379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 162479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 162579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 162679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 162779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 162879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 162979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 163079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 163179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 163279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 163379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 163479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 163579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Dig the endpoints for alt setting 0 out of the 163679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * interface cache for this interface 163779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 163879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp intf_cache = new_config->intf_cache[i]; 163979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < intf_cache->num_altsetting; j++) { 164079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (intf_cache->altsetting[j].desc.bAlternateSetting == 0) 164179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp alt = &intf_cache->altsetting[j]; 164279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!alt) { 164479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp printk(KERN_DEBUG "Did not find alt setting 0 for intf %d\n", i); 164579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp continue; 164679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 164879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 164979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 165079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 165179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 165279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 165379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 165479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 165579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 165679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 165779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 165879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 165979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 166079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 166195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 166295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 166395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 166495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 166595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 166695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 166795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 166895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 166995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 167095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 167195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 167295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 167395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 167495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 167595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 167695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 167795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 167895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 167995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 16803444b26afa145148951112534f298bdc554ec789David Vrabel/** 16813444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 16823444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 16833444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 16843444b26afa145148951112534f298bdc554ec789David Vrabel * 16853444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 16863444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 16873444b26afa145148951112534f298bdc554ec789David Vrabel */ 16883444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 16893444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 16903444b26afa145148951112534f298bdc554ec789David Vrabel{ 16913444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 16923444b26afa145148951112534f298bdc554ec789David Vrabel 16933444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 16943444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 16953444b26afa145148951112534f298bdc554ec789David Vrabel else { 16963444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 16973444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 16983444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 16993444b26afa145148951112534f298bdc554ec789David Vrabel 17003444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 17013444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 17023444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 17033444b26afa145148951112534f298bdc554ec789David Vrabel } 17043444b26afa145148951112534f298bdc554ec789David Vrabel} 17053444b26afa145148951112534f298bdc554ec789David Vrabel 1706cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1707cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1708cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1709cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1710cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1711cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1712cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1713cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1714cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1715cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1716cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 171932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 172032aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 172132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 172232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 172332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 172432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 172532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 172632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 172732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 172832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 172932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 173032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 17319293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 173365bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1735686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1736686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1737686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1739686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 174065bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 1741686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1742686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1743686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1744686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1745686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1746686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1747686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1748686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 17499293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1750686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1751686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1752686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 17539293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1754686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 17559293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 175865bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1760686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1761686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1762cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1764686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 176565bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 17660c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 17679293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1768979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1769979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1770686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 17719293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1772686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1773686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1774686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1775686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1776686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1777686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1778686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 17799293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1780686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1781cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1782686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 17839293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1784cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1785cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 17869293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 17879293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17906b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 17916b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 17926b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 17936b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 17946b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 17956b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 17966b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 17971941044aa9632aa8debbb94a3c8a5ed0ebddade8Alan Stern usb_mark_last_busy(udev); 179865bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern usb_external_resume_device(udev, PMSG_REMOTE_RESUME); 17996b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 18006b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 18016b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 18086b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 18096b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 18176b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern queue_work(ksuspend_usb_wq, &hcd->wakeup_work); 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18209293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1859782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18737d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 1876de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 1877de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1879de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 1880de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 1881de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 1882de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 1883de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1885de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT || 1886de85422b94ddb23c021126815ea49414047c13dcStefan Becker !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) { 1887de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1888de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 1889de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1890de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 1891de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 18928de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1893de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 1894de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 1895de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 1896de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 1897de85422b94ddb23c021126815ea49414047c13dcStefan Becker 1898de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 1899de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1920d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 19361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 19371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 19381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 19431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 19471b26da1510c02a2dac33c0ea48904256dcec4617Greg Kroah-Hartman struct device *dev, const char *bus_name) 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19517b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 19541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 19551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 19571720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 19581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 19601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 19611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1962dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1965d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1966d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 19676b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 19686b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 19696b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 19701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 19721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 19731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1976782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19781720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 19791720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 19801720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 19811720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 19821720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 19831720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 19841720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 19851720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 19861720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 19871720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 19881720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 19891720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 19901720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 1991782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 19921720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19951720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 19961720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1998782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 19991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 20021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 20031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 20121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20138ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 20148ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 20151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 20198de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 20208de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2021b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2022b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2023b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2024b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 20251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 20271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 20281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 20318ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2033b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2034b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2035b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2036b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2037b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 20386b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 20396b403b020c1f42180b14d28d832da61167cff822Sarah Sharp switch (hcd->driver->flags & HCD_MASK) { 20406b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 20416b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 20426b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20436b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 20446b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 20456b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20466b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 20476b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 20486b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20496b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 20506b403b020c1f42180b14d28d832da61167cff822Sarah Sharp goto err_allocate_root_hub; 20516b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2052b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 2053b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2054db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2055db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2056db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2057db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2058db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 2059db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 2060b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2061b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2062b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2063b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2064b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2065b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2066b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 2067b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2068fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2069fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2070fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2071b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2072b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2073b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 2075de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2076de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work as advertised when used together 2077de85422b94ddb23c021126815ea49414047c13dcStefan Becker * with IRQF_SHARED. As usb_hcd_irq() will always disable 2078de85422b94ddb23c021126815ea49414047c13dcStefan Becker * interrupts we can remove it here. 2079de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 208083a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand if (irqflags & IRQF_SHARED) 208183a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand irqflags &= ~IRQF_DISABLED; 2082de85422b94ddb23c021126815ea49414047c13dcStefan Becker 20831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 2088c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 20898ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 2092c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 21078ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2110b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 211155c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2112b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 21138ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 21148ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 21155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 21165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 21175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 21185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 21195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 21205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2121d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 2122d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 21241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 21265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 21275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_disconnect(&hcd->self.root_hub); 21285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2129b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 21308ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 2131b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 21331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2134b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2135b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 2136b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 2137b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 2138b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2140b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2144782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 21521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 21621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 21659ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 21666b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 2167d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 21686b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 21696b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 21705234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); 21714186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 21734186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21781b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern hcd->poll_rh = 0; 21791b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 21801b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2186782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 218864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 218964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 219064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 219164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 219264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 219364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 219464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 219564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2196782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 219764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2200f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 22161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 22171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 22191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 22201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 22231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 22251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 22281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 22291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 22321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 22331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 22351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2236f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2237