hcd.c revision 71d2718f2507dc17501d04e2bdca7b8e694ce365
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 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1397329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 14016f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 142667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 143667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 16316f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 165667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 166667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 27088fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 27188fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 27288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * helper routine for returning string descriptors in UTF-16LE 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * input can actually be ISO-8859-1; ASCII is its 7-bit subset 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 28271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluinstatic unsigned ascii2utf(char *s, u8 *utf, int utfmax) 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 28471d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned retval; 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = *s++; 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf++ = 0; 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (utfmax > 0) { 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *utf = *s; 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++retval; 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rh_string - provides manufacturer, product and serial strings for root hub 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @id: the string ID number (1: serial number, 2: product, 3: vendor) 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @data: return packet in UTF-16 LE 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @len: length of the return packet 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 30771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluinstatic unsigned rh_string(int id, struct usb_hcd *hcd, u8 *data, unsigned len) 30871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char buf [100]; 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (id == 0) { 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ 31571d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin len = min_t(unsigned, len, 4); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (data, buf, len); 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // serial number 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 1) { 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->self.bus_name, sizeof buf); 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // product description 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 2) { 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strlcpy (buf, hcd->product_desc, sizeof buf); 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // id 3 == vendor description 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (id == 3) { 32996b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 33096b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 33171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin } 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (len) { /* All cases fall through */ 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2 + ascii2utf (buf, data + 2, len - 2); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 2: 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [1] = 3; /* type == string */ 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 1: 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data [0] = 2 * (strlen (buf) + 1); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; /* Compiler wants a statement here */ 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 35354bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 35454bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 35671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 357e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 3587329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 3597329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3619439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 3629439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 363e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 364e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 365e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 366e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 367e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 368b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 369e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 384fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 385fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 386fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 387fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 388fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 389fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 390fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 391fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 392fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 393fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 394fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 395fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 396fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 397fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 398fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 399fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 401fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 402fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 409fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 414fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 415fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 416fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (hcd->driver->flags & HCD_USB11) 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 4367329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 4377329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->flags & HCD_USB2) { 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 447fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 45171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 45271d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 45371d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 45471d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 492b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 493b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 494b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 495b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 496b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 497b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 498b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 499b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 501b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 502b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 503b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 517b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 5337329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 5347329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 5357329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 5367329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 5377329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 5387329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 5397329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 5439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 544e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 5459439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 5469439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 5479439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 5489439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 5499439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 5509439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 5514a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 5529439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 5539439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 5549439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 561d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 562d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 563d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 565d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 566d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 568d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 569d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 570d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 571d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 572d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 573d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern char buffer[4]; /* Any root hubs with > 31 ports? */ 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5751b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern if (unlikely(!hcd->rh_registered)) 5761b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 577d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 578d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 580d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 581d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 583d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 5849439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 585d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 586d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 587e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->poll_pending = 0; 588e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 589e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 590e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 5919439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 592e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 5939439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 5944a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 5959439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 596e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 597d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 598d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 599e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6009439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 603d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 60401cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 60501cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 60601cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 607d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 608d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 60901cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 611d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 614d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 615d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 616d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 617d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 618d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 619d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 623d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 62571d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 627d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 628e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 629d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 630d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 631e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 632e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 634e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 635e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 636e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 638e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 639e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 640e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 641e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 642e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 643e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 644e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (hcd->poll_pending) 645e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 646e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 647e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 648d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 649d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6545e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 655d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 6565e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 663455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 664455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 665d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 666e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 668455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 669e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6719439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 672e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 673e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 674e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 675e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 6765e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 677455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 678d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 679d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 680d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 681455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 682d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 683d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 684e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6874a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6889439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6899439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 6909439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 691e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 6929439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 693e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 6975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 6985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 6995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 7045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 7135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 7165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 7185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 7195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 7205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 7215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 7225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 7235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 7245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 7265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 7275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 7285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 7295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 7305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 7315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 7325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 7335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 7345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 7355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 7365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 7375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 7395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 7405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 7415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 7445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 7455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 7465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 7475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 7485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 7505234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 7515234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 7525234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 7535234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7545234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7555234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7588561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartmanstatic struct class *usb_host_class; 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_host_init(void) 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7628561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman int retval = 0; 7638561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 7648561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman usb_host_class = class_create(THIS_MODULE, "usb_host"); 7658561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman if (IS_ERR(usb_host_class)) 7668561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman retval = PTR_ERR(usb_host_class); 7678561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman return retval; 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_host_cleanup(void) 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7728561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman class_destroy(usb_host_class); 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 809eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8124186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 814eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 816eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 818eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 819eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 8205a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 821b0b090e5792fa228b5c825fcc5e1b7b0da7abec9Greg Kroah-Hartman bus->dev = device_create(usb_host_class, bus->controller, MKDEV(0, 0), 822b0b090e5792fa228b5c825fcc5e1b7b0da7abec9Greg Kroah-Hartman bus, "usb_host%d", busnum); 8235a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones result = PTR_ERR(bus->dev); 8245a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones if (IS_ERR(bus->dev)) 825eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_create_class_dev; 8268561b10f6e7ef0a085709ffc844f74130a067abeGreg Kroah-Hartman 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 8294186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8313099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 833eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 834eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 836eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 837eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_create_class_dev: 838eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez clear_bit(busnum, busmap.busmap); 839eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 840eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 841eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8614186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 8634186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8653099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8695a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones device_unregister(bus->dev); 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8738ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8768ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 877b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 878b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 879b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 881b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 884b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8954186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 897551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9004186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9027071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9097071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9114186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 964498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 966498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 973782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 984e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 985e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 986e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 987e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 988e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 989e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 990e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 991e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 992e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 993e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 994e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 995e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 996e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 997e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 998e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 999e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1003e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 100649367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10099f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10119a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10166840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10176840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10186840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10196840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10206840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10229a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10239a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10259a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1028eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 10339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1036e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 10379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 10389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1039e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 10409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1041e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1042e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1043e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1044e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1045e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1046e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1047e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1048e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1049e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1050e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1051e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1052e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1053e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1057e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1058e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1059e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1060e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 10619a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 10629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 10639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 10649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 10659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 10669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 10679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 10689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 10699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1070e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1071e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 10749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1076eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1077e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1078eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 10829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 10839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 10849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 10859a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) && 10869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern !is_root_hub(urb->dev)) { 10879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 10889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 10899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 10909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1092e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 10939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1094e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 10959a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1096e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1097e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1098e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1099e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1100e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1101e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1102e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1103e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1104e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1105e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1106e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1109e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1113e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1115b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1116b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1117b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1118b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1119b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1120b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1121b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1122b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1123b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1124b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1125b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1126b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1127b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1128b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1129b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1130b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1131b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1132b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1133b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1134b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1135b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1136b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1137b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1138b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1139b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1140b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1141b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1142b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1143b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1144b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1145b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1146b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1147b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1148b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1149b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1150b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1151b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1152b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1153b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1154b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1155b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1156b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1157b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1158b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1159b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1160b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1161b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1162b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1163b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1164b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1165b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1166b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1167b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1168b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1169b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1170b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1171b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1172b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1173b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1174b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1175b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1176b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1177b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1178b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1179b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1180b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1181b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1182b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1183b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 11969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12009a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 12019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * unless it uses pio or talks to another transport. 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret == 0 && urb->transfer_buffer_length != 0 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1236b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret && usb_endpoint_xfer_control(&urb->ep->desc) 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 12519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 12549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1255b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return; 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1262b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 12639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, urb->setup_dma, 12649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern sizeof(struct usb_ctrlrequest), 12659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern DMA_TO_DEVICE); 1266b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1267b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->setup_dma, 1268b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1269b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1270b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1271b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1272b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1273b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1274b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (urb->transfer_buffer_length != 0 1275b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1276b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 12779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, 12789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_dma, 12799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_buffer_length, 1280b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1281b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1282b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->transfer_dma, 1283b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1284b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1285b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 12869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 12879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 12889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 12899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 12909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 12919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 12929a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 12939a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 12949a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 12959a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 12969a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 12979a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 12989a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 12999a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 13009a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 13029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 13039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 13049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13059a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 13069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 13074d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 13089a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 13099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 13119a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 13129a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 13139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 13149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 13159a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 13169a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1317b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm status = map_urb_for_dma(hcd, urb, mem_flags); 1318b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (unlikely(status)) { 1319b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm usbmon_urb_submit_error(&hcd->self, urb, status); 1320b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm goto error; 1321b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1322b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1323e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (is_root_hub(urb->dev)) 1324e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1325e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else 1326e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 13279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13289a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 13309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 1331b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm error: 1332b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 13339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 13349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 13354d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 133649367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 13379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 13389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1350e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1354809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1355e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1361e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1372a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1375cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1376cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1378cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1379cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1380cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1381cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1382cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1383cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1384cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1385cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1386cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1387cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1388cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1389cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1390cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1391cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1392cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1393cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1397e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 13989a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 13999a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 140532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 140632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 140732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 140832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 14094a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 141032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 141132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 141232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 141332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 141432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 141532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 141632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1417eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 14184a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1419eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1420eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 142132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 14224a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 142332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1424b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1425eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 14264a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1427eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1428b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 14294a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 14304a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 143132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 14321f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern unmap_urb_for_dma(hcd, urb); 14334a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 14341f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 14351f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 143632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 14374a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 143832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 143932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 144049367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 144132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 144232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 144332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1444782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 144532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 144632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 144732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 144895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 144995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 145095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 145295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1453a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 145895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 145995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 14609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 14611720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 146395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 14649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1465ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 14675e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1469eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 14725e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1473809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1475e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1476e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1477e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1478e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1479e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1480e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1481e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1482e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1483e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1484e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1485e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1486e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1487e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1488e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1489e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1490e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1491e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1492e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1493e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1494e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1498ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 150395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1504455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1505809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1506455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1507455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1508455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1509455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1510455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1511455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1512455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1513455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1514809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1515455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1516455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1517455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1518455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1519455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1520455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 152395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 152495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 152595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 152695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 152795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 152895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 152995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 153095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 153195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 153295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 153395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 153495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 153595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 153695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 153795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 153895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 153995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 154095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 154195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 1542cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1543cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1544cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1545cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1546cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1547cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1548cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1549cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1550cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1551cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1552cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 155532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 155632aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 155732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 155832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 155932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 156032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 156132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 156232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 156332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 156432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 156532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 156632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 15679293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 156965bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1571686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1572686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1573686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1575686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 157665bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 1577686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1578686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1579686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1580686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1581686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1582686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1583686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1584686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 15859293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1586686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1587686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1588686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 15899293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1590686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 15919293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 159465bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1596686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1597686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1598cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1600686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 160165bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 16020c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 16039293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1604979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1605979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1606686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 16079293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1608686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1609686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1610686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1611686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1612686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1613686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1614686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 16159293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1616686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1617cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1618686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 16199293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1620cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1621cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 16229293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 16239293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16266b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 16276b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 16286b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 16296b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 16306b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 16316b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 16326b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 16331941044aa9632aa8debbb94a3c8a5ed0ebddade8Alan Stern usb_mark_last_busy(udev); 163465bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern usb_external_resume_device(udev, PMSG_REMOTE_RESUME); 16356b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 16366b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 16376b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 16446b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 16456b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 16536b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern queue_work(ksuspend_usb_wq, &hcd->wakeup_work); 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16569293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1695782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17097d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 1712de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 1713de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1715de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 1716de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 1717de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 1718de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 1719de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT || 1722de85422b94ddb23c021126815ea49414047c13dcStefan Becker !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) { 1723de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1724de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 1725de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1726de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 1727de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 17288de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1729de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 1730de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 1731de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 1732de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 1733de85422b94ddb23c021126815ea49414047c13dcStefan Becker 1734de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 1735de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1756d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 17831b26da1510c02a2dac33c0ea48904256dcec4617Greg Kroah-Hartman struct device *dev, const char *bus_name) 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17877b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 17931720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 1798dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 1801d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 1802d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 18036b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 18046b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 18056b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1812782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18141720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 18151720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 18161720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 18171720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 18181720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 18191720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 18201720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 18211720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 18221720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 18231720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 18241720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 18251720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 18261720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 1827782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 18281720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 18291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18311720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 18321720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1834782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 18431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18498ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 18508ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18545234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 18558de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 18568de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1857b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 1858b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 1859b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 1860b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 18678ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1869b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 1870b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 1871b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 1872b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 1873b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1874b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : 1875b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell USB_SPEED_FULL; 1876b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 1877b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1878db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 1879db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 1880db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 1881db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 1882db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 1883db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 1884b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 1885b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 1886b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 1887b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 1888b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 1889b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 1890b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 1891b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1892fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 1893fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 1894fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 1895b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 1896b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 1897b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 18981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 1899de85422b94ddb23c021126815ea49414047c13dcStefan Becker 1900de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work as advertised when used together 1901de85422b94ddb23c021126815ea49414047c13dcStefan Becker * with IRQF_SHARED. As usb_hcd_irq() will always disable 1902de85422b94ddb23c021126815ea49414047c13dcStefan Becker * interrupts we can remove it here. 1903de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 190483a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand if (irqflags & IRQF_SHARED) 190583a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand irqflags &= ~IRQF_DISABLED; 1906de85422b94ddb23c021126815ea49414047c13dcStefan Becker 19071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 1912c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 19138ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 1916c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 19318ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1934b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 193555c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 1936b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 19378ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 19388ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 19395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 19405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 19415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 19425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 19435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 19445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 1945d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 1946d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 19471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 19505234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 19515234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_disconnect(&hcd->self.root_hub); 19525234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 1953b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 19548ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 1955b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 19571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 1958b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 1959b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 1960b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 1961b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 1962b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 1964b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 19651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 19671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1968782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 19691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 19721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 19731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 19761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 19791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 19811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 19841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 19871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 19899ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 19906b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 1991d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 19926b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 19936b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 19945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); 19954186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 19974186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 19981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 20001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20021b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern hcd->poll_rh = 0; 20031b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 20041b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2010782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 201364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 201464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 201564a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 201664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 201764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 201864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 201964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2020782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 202164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2024f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 20251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 20271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 20291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 20301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 20311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 20341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 20371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 20401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 20441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 20531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2060f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2061