hcd.c revision 70445ae6c669865e464307a155e881096e4a0ae7
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> 413f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp#include <linux/mutex.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hcd.h" 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "hub.h" 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB Host Controller Driver framework 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HCD-specific behaviors/bugs. 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This does error checks, tracks devices and urbs, and delegates to a 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "hc_driver" only for code (and data) that really needs to know about 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware differences. That includes root hub registers, i/o queues, 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and so on ... but as little else as possible. 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Shared code includes most of the "root hub" code (these are emulated, 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * though each HC's hardware works differently) and PCI glue, plus request 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tracking overhead. The HCD code should only block on spinlocks or on 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hardware handshaking; blocking on software events (such as other kernel 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * threads releasing resources, or completing actions) is all generic. 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Happens the USB 2.0 spec says this would be invisible inside the "USBD", 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and includes mostly a "HCDI" (HCD Interface) along with some APIs used 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only by the hub driver ... and that neither should be seen or used by 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb client device drivers. 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Contributors of ideas or unattributed patches include: David Brownell, 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HISTORY: 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2002-02-21 Pull in most of the usb_bus support from usb.c; some 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * associated cleanup. "usb_hcd" still != "usb_bus". 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 859beeee6584b9aa4f9192055512411484a2a624dfAlan Stern/* Keep track of which host controller drivers are loaded */ 869beeee6584b9aa4f9192055512411484a2a624dfAlan Sternunsigned long usb_hcds_loaded; 879beeee6584b9aa4f9192055512411484a2a624dfAlan SternEXPORT_SYMBOL_GPL(usb_hcds_loaded); 889beeee6584b9aa4f9192055512411484a2a624dfAlan Stern 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* host controllers we manage */ 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsLIST_HEAD (usb_bus_list); 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list); 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when allocating bus numbers */ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_MAXBUS 64 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_busmap { 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_busmap busmap; 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used when updating list of hcds */ 1014186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de VenDEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_bus_list_lock); 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* used for controlling access to virtual root hubs */ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEFINE_SPINLOCK(hcd_root_hub_lock); 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 107809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern/* used when updating an endpoint's URB list */ 108809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_list_lock); 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 110cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* used to protect against unlinking URBs after the device is gone */ 111cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternstatic DEFINE_SPINLOCK(hcd_urb_unlink_lock); 112cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* wait queue for synchronous unlinks */ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsDECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 116809a58b896ba07e771adc76a47c83e4ca1969da8Alan Sternstatic inline int is_root_hub(struct usb_device *udev) 117809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern{ 118809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern return (udev->parent == NULL); 119809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern} 120809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sharable chunks of root hub code. 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 132d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp/* usb 3.0 root hub device descriptor */ 133d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 usb3_rh_dev_descriptor[18] = { 134d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x12, /* __u8 bLength; */ 135d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bDescriptorType; Device */ 136d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ 137d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 138d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 139d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 bDeviceSubClass; */ 140d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ 141d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ 142d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 143d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 144d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 145d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 146d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 147d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 iManufacturer; */ 148d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 iProduct; */ 149d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 iSerialNumber; */ 150d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01 /* __u8 bNumConfigurations; */ 151d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 152d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 2.0 root hub device descriptor */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb2_rh_dev_descriptor [18] = { 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1617329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ 16216f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 164667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 165667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* usb 1.1 root hub device descriptor */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 usb11_rh_dev_descriptor [18] = { 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x12, /* __u8 bLength; */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bDescriptorType; Device */ 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceSubClass; */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ 18516f16d117c1eb99451e4c73c87546eef05c66790Alan Stern 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 187667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ 188667d691ed7a70c9a9fde5b6bd663a5f38326e026Greg Kroah-Hartman 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 iManufacturer; */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 iProduct; */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 iSerialNumber; */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01 /* __u8 bNumConfigurations; */ 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Configuration descriptors for our root hubs */ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 fs_rh_config_descriptor [] = { 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const u8 hs_rh_config_descriptor [] = { 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one configuration */ 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 bLength; */ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x02, /* __u8 bDescriptorType; Configuration */ 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x19, 0x00, /* __le16 wTotalLength; */ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bNumInterfaces; (1) */ 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 bConfigurationValue; */ 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 iConfiguration; */ 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xc0, /* __u8 bmAttributes; 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Bit 7: must be set, 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6: Self-powered, 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5: Remote wakeup, 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4..0: resvd */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 MaxPower; */ 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* USB 1.1: 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, single TT organization (mandatory): 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * one interface, protocol 0 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0, multiple TT organization (optional): 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two interfaces, protocols 1 (like single TT) 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and 2 (multiple TT mode) ... config is 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sometimes settable 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOT IMPLEMENTED 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one interface */ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bLength; */ 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x04, /* __u8 if_bDescriptorType; Interface */ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceNumber; */ 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bAlternateSetting; */ 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x01, /* __u8 if_bNumEndpoints; */ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceSubClass; */ 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x00, /* __u8 if_iInterface; */ 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* one endpoint (status change endpoint) */ 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x07, /* __u8 ep_bLength; */ 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x03, /* __u8 ep_bmAttributes; Interrupt */ 29288fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 29388fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com * see hub.c:hub_configure() for details. */ 29488fafff9d73c0a506c0b08e7cd637c89d8b604e1inaky@linux.intel.com (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 298d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharpstatic const u8 ss_rh_config_descriptor[] = { 299d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one configuration */ 300d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 bLength; */ 301d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x02, /* __u8 bDescriptorType; Configuration */ 302d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x19, 0x00, /* __le16 wTotalLength; FIXME */ 303d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bNumInterfaces; (1) */ 304d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 bConfigurationValue; */ 305d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 iConfiguration; */ 306d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0xc0, /* __u8 bmAttributes; 307d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp Bit 7: must be set, 308d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 6: Self-powered, 309d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 5: Remote wakeup, 310d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 4..0: resvd */ 311d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 MaxPower; */ 312d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 313d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one interface */ 314d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bLength; */ 315d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x04, /* __u8 if_bDescriptorType; Interface */ 316d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceNumber; */ 317d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bAlternateSetting; */ 318d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x01, /* __u8 if_bNumEndpoints; */ 319d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 320d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceSubClass; */ 321d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_bInterfaceProtocol; */ 322d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x00, /* __u8 if_iInterface; */ 323d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 324d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* one endpoint (status change endpoint) */ 325d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x07, /* __u8 ep_bLength; */ 326d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 327d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 328d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x03, /* __u8 ep_bmAttributes; Interrupt */ 329d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) 330d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * see hub.c:hub_configure() for details. */ 331d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, 332d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ 333d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp /* 334d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * All 3.0 hubs should have an endpoint companion descriptor, 335d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp * but we're ignoring that for now. FIXME? 336d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp */ 337d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp}; 338d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 342392ca68b401e0797115a08836642faad5778fdb2George Spelvin * ascii2desc() - Helper routine for producing UTF-16LE string descriptors 343392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @s: Null-terminated ASCII (actually ISO-8859-1) string 344392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @buf: Buffer for USB string descriptor (header + UTF-16LE) 345392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: Length (in bytes; may be odd) of descriptor buffer. 346392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 347392ca68b401e0797115a08836642faad5778fdb2George Spelvin * The return value is the number of bytes filled in: 2 + 2*strlen(s) or 348392ca68b401e0797115a08836642faad5778fdb2George Spelvin * buflen, whichever is less. 349392ca68b401e0797115a08836642faad5778fdb2George Spelvin * 350392ca68b401e0797115a08836642faad5778fdb2George Spelvin * USB String descriptors can contain at most 126 characters; input 351392ca68b401e0797115a08836642faad5778fdb2George Spelvin * strings longer than that are truncated. 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 353392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 354392ca68b401e0797115a08836642faad5778fdb2George Spelvinascii2desc(char const *s, u8 *buf, unsigned len) 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 356392ca68b401e0797115a08836642faad5778fdb2George Spelvin unsigned n, t = 2 + 2*strlen(s); 357392ca68b401e0797115a08836642faad5778fdb2George Spelvin 358392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (t > 254) 359392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = 254; /* Longest possible UTF string descriptor */ 360392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > t) 361392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = t; 362392ca68b401e0797115a08836642faad5778fdb2George Spelvin 363392ca68b401e0797115a08836642faad5778fdb2George Spelvin t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ 364392ca68b401e0797115a08836642faad5778fdb2George Spelvin 365392ca68b401e0797115a08836642faad5778fdb2George Spelvin n = len; 366392ca68b401e0797115a08836642faad5778fdb2George Spelvin while (n--) { 367392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t; 368392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (!n--) 369392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 370392ca68b401e0797115a08836642faad5778fdb2George Spelvin *buf++ = t >> 8; 371392ca68b401e0797115a08836642faad5778fdb2George Spelvin t = (unsigned char)*s++; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 373392ca68b401e0797115a08836642faad5778fdb2George Spelvin return len; 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 376392ca68b401e0797115a08836642faad5778fdb2George Spelvin/** 377392ca68b401e0797115a08836642faad5778fdb2George Spelvin * rh_string() - provides string descriptors for root hub 378392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the host controller for this root hub 380392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @data: buffer for output packet 381392ca68b401e0797115a08836642faad5778fdb2George Spelvin * @len: length of the provided buffer 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Produces either a manufacturer, product or serial number string for the 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * virtual root hub device. 385392ca68b401e0797115a08836642faad5778fdb2George Spelvin * Returns the number of bytes filled in: the length of the descriptor or 386392ca68b401e0797115a08836642faad5778fdb2George Spelvin * of the provided buffer, whichever is less. 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 388392ca68b401e0797115a08836642faad5778fdb2George Spelvinstatic unsigned 389392ca68b401e0797115a08836642faad5778fdb2George Spelvinrh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) 39071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin{ 391392ca68b401e0797115a08836642faad5778fdb2George Spelvin char buf[100]; 392392ca68b401e0797115a08836642faad5778fdb2George Spelvin char const *s; 393392ca68b401e0797115a08836642faad5778fdb2George Spelvin static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // language ids 396392ca68b401e0797115a08836642faad5778fdb2George Spelvin switch (id) { 397392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 0: 398392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ 399392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ 400392ca68b401e0797115a08836642faad5778fdb2George Spelvin if (len > 4) 401392ca68b401e0797115a08836642faad5778fdb2George Spelvin len = 4; 402392ca68b401e0797115a08836642faad5778fdb2George Spelvin memcpy(data, langids, len); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 404392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 1: 405392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Serial number */ 406392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->self.bus_name; 407392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 408392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 2: 409392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Product name */ 410392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = hcd->product_desc; 411392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 412392ca68b401e0797115a08836642faad5778fdb2George Spelvin case 3: 413392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Manufacturer */ 41496b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, 41596b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->release, hcd->driver->description); 416392ca68b401e0797115a08836642faad5778fdb2George Spelvin s = buf; 417392ca68b401e0797115a08836642faad5778fdb2George Spelvin break; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 419392ca68b401e0797115a08836642faad5778fdb2George Spelvin /* Can't happen; caller guarantees it */ 420392ca68b401e0797115a08836642faad5778fdb2George Spelvin return 0; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 422392ca68b401e0797115a08836642faad5778fdb2George Spelvin 423392ca68b401e0797115a08836642faad5778fdb2George Spelvin return ascii2desc(s, data, len); 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Root hub control transfers execute synchronously */ 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ctrlrequest *cmd; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 typeReq, wValue, wIndex, wLength; 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *ubuf = urb->transfer_buffer; 43354bee6e1b455573658972510a76119f279db32b7Mikael Pettersson u8 tbuf [sizeof (struct usb_hub_descriptor)] 43454bee6e1b455573658972510a76119f279db32b7Mikael Pettersson __attribute__((aligned(4))); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *bufp = tbuf; 43671d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 0; 437e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int status; 4387329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_wakeup = 0; 4397329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern u8 patch_protocol = 0; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern might_sleep(); 4429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 443e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock_irq(&hcd_root_hub_lock); 444e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = usb_hcd_link_urb_to_ep(hcd, urb); 445e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 446e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (status) 447e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return status; 448b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = hcd; /* Indicate it's queued */ 449e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmd = (struct usb_ctrlrequest *) urb->setup_packet; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq = (cmd->bRequestType << 8) | cmd->bRequest; 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue = le16_to_cpu (cmd->wValue); 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wIndex = le16_to_cpu (cmd->wIndex); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wLength = le16_to_cpu (cmd->wLength); 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wLength > urb->transfer_buffer_length) 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = 0; 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (typeReq) { 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DEVICE REQUESTS */ 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 464fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* The root hub's remote wakeup enable bit is implemented using 465fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * driver model wakeup flags. If this system supports wakeup 466fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * through USB, userspace may change the default "allow wakeup" 467fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * policy through sysfs or these calls. 468fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 469fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Most root hubs support wakeup from downstream devices, for 470fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * runtime power management (disabling USB clocks and reducing 471fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * VBUS power usage). However, not all of them do so; silicon, 472fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * board, and BIOS bugs here are not uncommon, so these can't 473fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * be treated quite like external hubs. 474fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * 475fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * Likewise, not all root hubs will pass wakeup events upstream, 476fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * to wake up the whole system. So don't assume root hub and 477fb669cc01ed778c4926f395e44a9b61644597d38David Brownell * controller capabilities are identical. 478fb669cc01ed778c4926f395e44a9b61644597d38David Brownell */ 479fb669cc01ed778c4926f395e44a9b61644597d38David Brownell 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_STATUS: 481fb669cc01ed778c4926f395e44a9b61644597d38David Brownell tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) 482fb669cc01ed778c4926f395e44a9b61644597d38David Brownell << USB_DEVICE_REMOTE_WAKEUP) 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | (1 << USB_DEVICE_SELF_POWERED); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (wValue == USB_DEVICE_REMOTE_WAKEUP) 489fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_FEATURE: 494fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev) 495fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && wValue == USB_DEVICE_REMOTE_WAKEUP) 496fb669cc01ed778c4926f395e44a9b61644597d38David Brownell device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_CONFIGURATION: 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 1; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (wValue & 0xff00) { 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE << 8: 5097dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5107dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 511d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = usb3_rh_dev_descriptor; 5127dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5137dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb2_rh_dev_descriptor; 5157dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5167dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = usb11_rh_dev_descriptor; 5187dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5197dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5217dd19e69d131ea34f74397559b422511e54d2911Viral Mehta } 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 18; 5237329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (hcd->has_tt) 5247329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern patch_protocol = 1; 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG << 8: 5277dd19e69d131ea34f74397559b422511e54d2911Viral Mehta switch (hcd->driver->flags & HCD_MASK) { 5287dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB3: 529d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp bufp = ss_rh_config_descriptor; 530d2e9b4d6734db2327af3149d8ca7555307e10828Sarah Sharp len = sizeof ss_rh_config_descriptor; 5317dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5327dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB2: 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = hs_rh_config_descriptor; 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof hs_rh_config_descriptor; 5357dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5367dd19e69d131ea34f74397559b422511e54d2911Viral Mehta case HCD_USB11: 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bufp = fs_rh_config_descriptor; 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = sizeof fs_rh_config_descriptor; 5397dd19e69d131ea34f74397559b422511e54d2911Viral Mehta break; 5407dd19e69d131ea34f74397559b422511e54d2911Viral Mehta default: 5417dd19e69d131ea34f74397559b422511e54d2911Viral Mehta goto error; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 543fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(&hcd->self.root_hub->dev)) 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds patch_wakeup = 1; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING << 8: 54771d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin if ((wValue & 0xff) < 4) 54871d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin urb->actual_length = rh_string(wValue & 0xff, 54971d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin hcd, ubuf, wLength); 55071d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin else /* unsupported IDs --> "protocol stall" */ 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto error; 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceRequest | USB_REQ_GET_INTERFACE: 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 1; 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_INTERFACE: 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DeviceOutRequest | USB_REQ_SET_ADDRESS: 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // wValue == urb->dev->devaddr 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "root hub device address %d\n", 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wValue); 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INTERFACE REQUESTS (no defined feature/status flags) */ 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* ENDPOINT REQUESTS */ 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointRequest | USB_REQ_GET_STATUS: 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // ENDPOINT_HALT flag 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [0] = 0; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tbuf [1] = 0; 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 2; 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* FALLTHROUGH */ 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case EndpointOutRequest | USB_REQ_SET_FEATURE: 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, "no endpoint features yet\n"); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* CLASS REQUESTS (and errors) */ 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* non-generic request */ 588b13296c6617f22e8c0174a7af32780617db0e680David Brownell switch (typeReq) { 589b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubStatus: 590b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetPortStatus: 591b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = 4; 592b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 593b13296c6617f22e8c0174a7af32780617db0e680David Brownell case GetHubDescriptor: 594b13296c6617f22e8c0174a7af32780617db0e680David Brownell len = sizeof (struct usb_hub_descriptor); 595b13296c6617f22e8c0174a7af32780617db0e680David Brownell break; 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 597b13296c6617f22e8c0174a7af32780617db0e680David Brownell status = hcd->driver->hub_control (hcd, 598b13296c6617f22e8c0174a7af32780617db0e680David Brownell typeReq, wValue, wIndex, 599b13296c6617f22e8c0174a7af32780617db0e680David Brownell tbuf, wLength); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldserror: 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* "protocol stall" on error */ 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = -EPIPE; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = 0; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status != -EPIPE) { 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (hcd->self.controller, 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "CTRL: TypeReq=0x%x val=0x%x " 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "idx=0x%x len=%d ==> %d\n", 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds typeReq, wValue, wIndex, 613b13296c6617f22e8c0174a7af32780617db0e680David Brownell wLength, status); 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len) { 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->transfer_buffer_length < len) 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = urb->transfer_buffer_length; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->actual_length = len; 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // always USB_DIR_IN, toward host 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy (ubuf, bufp, len); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* report whether RH hardware supports remote wakeup */ 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (patch_wakeup && 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len > offsetof (struct usb_config_descriptor, 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bmAttributes)) 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *)ubuf)->bmAttributes 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds |= USB_CONFIG_ATT_WAKEUP; 6297329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern 6307329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern /* report whether RH hardware has an integrated TT */ 6317329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern if (patch_protocol && 6327329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern len > offsetof(struct usb_device_descriptor, 6337329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol)) 6347329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern ((struct usb_device_descriptor *) ubuf)-> 6357329e211b987a493cbcfca0e98c60eb108ab42dfAlan Stern bDeviceProtocol = 1; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* any errors get returned through the urb completion */ 6399439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irq(&hcd_root_hub_lock); 640e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6419439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6429439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern /* This peculiar use of spinlocks echoes what real HC drivers do. 6439439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * Avoiding calls to local_irq_disable/enable makes the code 6449439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern * RT-friendly. 6459439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern */ 6469439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6474a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 6489439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 6499439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 6509439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irq(&hcd_root_hub_lock); 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 657d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Root Hub interrupt transfers are polled using a timer if the 658d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * driver requests it; otherwise the driver is responsible for 659d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * calling usb_hcd_poll_rh_status() when an event occurs. 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 661d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * Completions are called in_interrupt(), but they may or may not 662d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern * be in_irq(). 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 664d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternvoid usb_hcd_poll_rh_status(struct usb_hcd *hcd) 665d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 666d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern struct urb *urb; 667d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int length; 668d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern unsigned long flags; 669ad361c9884e809340f6daca80d56a9e9c871690aJoe Perches char buffer[6]; /* Any root hubs with > 31 ports? */ 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6711b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern if (unlikely(!hcd->rh_registered)) 6721b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern return; 673d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling && !hcd->status_urb) 674d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return; 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 676d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = hcd->driver->hub_status_data(hcd, buffer); 677d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (length > 0) { 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 679d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* try to complete the status urb */ 6809439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 681d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern urb = hcd->status_urb; 682d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb) { 683e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->poll_pending = 0; 684e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = NULL; 685e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->actual_length = length; 686e9df41c5c5899259541dc928872cad4d07b82076Alan Stern memcpy(urb->transfer_buffer, buffer, length); 6879439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern 688e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 6899439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 6904a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, 0); 6919439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 692e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } else { 693d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern length = 0; 694d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_pending = 1; 695e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 6969439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 699d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern /* The USB 2.0 spec says 256 ms. This is close enough and won't 70001cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * exceed that limit if HZ is 100. The math is more clunky than 70101cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * maybe expected, this is to make sure that all timers for USB devices 70201cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven * fire at the same time to give the CPU a break inbetween */ 703d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling ? hcd->poll_rh : 704d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern (length == 0 && hcd->status_urb != NULL)) 70501cd08192040eab30f837f061ca07f43cf15f4a1Arjan van de Ven mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 707d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan SternEXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* timer callback */ 710d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic void rh_timer_func (unsigned long _hcd) 711d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern{ 712d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); 713d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern} 714d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 715d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern/*-------------------------------------------------------------------------*/ 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 717d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Sternstatic int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 719d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern int retval; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 72171d2718f2507dc17501d04e2bdca7b8e694ce365Roel Kluin unsigned len = 1 + (urb->dev->maxchild / 8); 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 723d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_lock_irqsave (&hcd_root_hub_lock, flags); 724e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (hcd->status_urb || urb->transfer_buffer_length < len) { 725d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); 726d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern retval = -EINVAL; 727e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 728e9df41c5c5899259541dc928872cad4d07b82076Alan Stern } 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 730e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = usb_hcd_link_urb_to_ep(hcd, urb); 731e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (retval) 732e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 734e9df41c5c5899259541dc928872cad4d07b82076Alan Stern hcd->status_urb = urb; 735e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb->hcpriv = hcd; /* indicate it's queued */ 736e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (!hcd->uses_new_polling) 737e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); 738e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 739e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* If a status change has already occurred, report it ASAP */ 740e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (hcd->poll_pending) 741e9df41c5c5899259541dc928872cad4d07b82076Alan Stern mod_timer(&hcd->rh_timer, jiffies); 742e9df41c5c5899259541dc928872cad4d07b82076Alan Stern retval = 0; 743e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 744d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 745d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return retval; 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7505e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_int(&urb->ep->desc)) 751d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return rh_queue_status (hcd, urb); 7525e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_xfer_control(&urb->ep->desc)) 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rh_call_control (hcd, urb); 754d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern return -EINVAL; 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 759455b25fb209c8241e2163b491228b28667d82c1cAlan Stern/* Unlinks of root-hub control URBs are legal, but they don't do anything 760455b25fb209c8241e2163b491228b28667d82c1cAlan Stern * since these URBs always execute synchronously. 761d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern */ 762e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 764455b25fb209c8241e2163b491228b28667d82c1cAlan Stern unsigned long flags; 765e9df41c5c5899259541dc928872cad4d07b82076Alan Stern int rc; 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7679439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock_irqsave(&hcd_root_hub_lock, flags); 768e9df41c5c5899259541dc928872cad4d07b82076Alan Stern rc = usb_hcd_check_unlink_urb(hcd, urb, status); 769e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (rc) 770e9df41c5c5899259541dc928872cad4d07b82076Alan Stern goto done; 771e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 7725e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ 773455b25fb209c8241e2163b491228b28667d82c1cAlan Stern ; /* Do nothing */ 774d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern 775d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern } else { /* Status URB */ 776d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (!hcd->uses_new_polling) 777455b25fb209c8241e2163b491228b28667d82c1cAlan Stern del_timer (&hcd->rh_timer); 778d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (urb == hcd->status_urb) { 779d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->status_urb = NULL; 780e9df41c5c5899259541dc928872cad4d07b82076Alan Stern usb_hcd_unlink_urb_from_ep(hcd, urb); 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7829439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock(&hcd_root_hub_lock); 7834a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usb_hcd_giveback_urb(hcd, urb, status); 7849439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_lock(&hcd_root_hub_lock); 7859439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 7869439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern } 787e9df41c5c5899259541dc928872cad4d07b82076Alan Stern done: 7889439eb94b5c374d5b02699f8897fc43aa3603701Alan Stern spin_unlock_irqrestore(&hcd_root_hub_lock, flags); 789e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return rc; 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7925234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7935234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 7945234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* 7955234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez * Show & store the current value of authorized_default 7965234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez */ 7975234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_show(struct device *dev, 7985234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 7995234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez char *buf) 8005234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8015234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8025234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8035234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8045234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8055234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8065234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8075234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8085234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); 8095234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8105234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8115234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic ssize_t usb_host_authorized_default_store(struct device *dev, 8125234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct device_attribute *attr, 8135234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez const char *buf, size_t size) 8145234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez{ 8155234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez ssize_t result; 8165234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez unsigned val; 8175234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_device *rh_usb_dev = to_usb_device(dev); 8185234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_bus *usb_bus = rh_usb_dev->bus; 8195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez struct usb_hcd *usb_hcd; 8205234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8215234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ 8225234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return -ENODEV; 8235234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd = bus_to_hcd(usb_bus); 8245234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = sscanf(buf, "%u\n", &val); 8255234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (result == 1) { 8265234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_hcd->authorized_default = val? 1 : 0; 8275234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = size; 8285234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 8295234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez else 8305234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez result = -EINVAL; 8315234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez return result; 8325234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez} 8335234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8345234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic DEVICE_ATTR(authorized_default, 0644, 8355234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_show, 8365234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_host_authorized_default_store); 8375234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8385234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8395234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez/* Group all the USB bus attributes */ 8405234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute *usb_bus_attrs[] = { 8415234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez &dev_attr_authorized_default.attr, 8425234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez NULL, 8435234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8445234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8455234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezstatic struct attribute_group usb_bus_attr_group = { 8465234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .name = NULL, /* we want them in the same directory */ 8475234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez .attrs = usb_bus_attrs, 8485234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez}; 8495234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8505234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8515234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_init - shared initialization code 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus structure being initialized 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code is used to initialize a usb_bus structure, memory for which is 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * separately managed. 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_bus_init (struct usb_bus *bus) 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&bus->devmap, 0, sizeof(struct usb_devmap)); 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->devnum_next = 1; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->root_hub = NULL; 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->busnum = -1; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_allocated = 0; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_int_reqs = 0; 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus->bandwidth_isoc_reqs = 0; 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD (&bus->bus_list); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_register_bus - registers the USB host controller with the usb core 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to register 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Assigns a bus number, and links the controller into usbcore data 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it can be seen by scanning the bus list. 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int usb_register_bus(struct usb_bus *bus) 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 888eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez int result = -E2BIG; 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int busnum; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8914186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); 893eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez if (busnum >= USB_MAXBUS) { 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk (KERN_ERR "%s: too many buses\n", usbcore_name); 895eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez goto error_find_busnum; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 897eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez set_bit (busnum, busmap.busmap); 898eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez bus->busnum = busnum; 8995a3201b2809a9f7bcda8413c445483f5b5e490a3Tony Jones 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Add it to the local list of buses */ 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add (&bus->bus_list, &usb_bus_list); 9024186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9043099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_add_bus(bus); 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 906eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez dev_info (bus->controller, "new USB bus registered, assigned bus " 907eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez "number %d\n", bus->busnum); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 909eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez 910eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalezerror_find_busnum: 911eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 912eb579f5811ddbc052c8d6b3bba38dd4e5148cf7bInaky Perez-Gonzalez return result; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_deregister_bus - deregisters the USB host controller 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: pointer to the bus to deregister 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Recycles the bus number, and unlinks the controller from usbcore data 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * structures so that it won't be seen by scanning the bus list. 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void usb_deregister_bus (struct usb_bus *bus) 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NOTE: make sure that all the devices are removed by the 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * controller code, as well as having it call this when cleaning 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * itself up 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9324186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del (&bus->bus_list); 9344186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9363099e75a7ccc3c5b0a4cf988a76d9c4a7fa5e91aGreg Kroah-Hartman usb_notify_remove_bus(bus); 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit (bus->busnum, busmap.busmap); 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9428ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * register_root_hub - called by usb_add_hcd() to register a root hub 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9458ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern * This function registers the root hub with the USB subsystem. It sets up 946b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * the device properly in the device tree and then calls usb_new_device() 947b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * to register the usb device. It also assigns the root hub's USB address 948b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * (always 1). 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 950b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellstatic int register_root_hub(struct usb_hcd *hcd) 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device *parent_dev = hcd->self.controller; 953b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell struct usb_device *usb_dev = hcd->self.root_hub; 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const int devnum = 1; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->devnum = devnum; 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_dev->bus->devnum_next = devnum + 1; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset (&usb_dev->bus->devmap.devicemap, 0, 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof usb_dev->bus->devmap.devicemap); 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit (devnum, usb_dev->bus->devmap.devicemap); 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state(usb_dev, USB_STATE_ADDRESS); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9644186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 966551509d267905705f6d723e51ec706916f06b859Harvey Harrison usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval != sizeof usb_dev->descriptor) { 9694186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (parent_dev, "can't read %s device descriptor %d\n", 9717071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (retval < 0) ? retval : -EMSGSIZE; 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_new_device (usb_dev); 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) { 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (parent_dev, "can't register root hub for %s, %d\n", 9787071a3ce0ca058ad2a9e3e8c33f30fb0bce62005Kay Sievers dev_name(&usb_dev->dev), retval); 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9804186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) { 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 1; 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the HC die before the root hub was registered? */ 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->state == HC_STATE_HALT) 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_hc_died (hcd); /* This time clean up */ 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_calc_bus_time - approximate periodic transaction time in nanoseconds 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @is_input: true iff the transaction sends data to the host 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @isoc: true for isochronous transactions, false for interrupt ones 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bytecount: how many bytes in the transaction. 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Returns approximate bus time in nanoseconds for a periodic transaction. 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See USB 2.0 spec section 5.11.3; only periodic transfers need to be 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * scheduled in software, this function is only used for such scheduling. 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldslong usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long tmp; 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (speed) { 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: /* INTR only */ 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (is_input) { 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: /* ISOC or INTR */ 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) { 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (9107L + BW_HOST_DELAY + tmp); 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: /* ISOC or INTR */ 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // FIXME adjust for input vs output 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isoc) 1033498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS_ISO (bytecount); 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 1035498f78e6fcf558d0dec31f5648f43426ae16433fDan Streetman tmp = HS_NSECS (bytecount); 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return tmp; 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pr_debug ("%s: bogus device speed!\n", usbcore_name); 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1042782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_calc_bus_time); 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HC operations. 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1053e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1054e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue 1055e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1056e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being submitted 1057e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1058e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their enqueue() 1059e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1060e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for URB 1061e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * submission, as well as for endpoint shutdown and for usb_kill_urb. 1062e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1063e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1064e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the enqueue() method must fail). If no error occurs but enqueue() fails 1065e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing 1066e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the private spinlock and returning. 1067e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1068e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int rc = 0; 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1072e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Check that the URB isn't being killed */ 107549367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) { 10769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -EPERM; 10779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10789f6a93f7bbb6d73ca0e43c000f3bbf521cd4f782Pete Zaitcev } 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(!urb->ep->enabled)) { 10819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ENOENT; 10829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 10839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10856840d2555afd66290be7a39b400b5e66a840b82dAlan Stern if (unlikely(!urb->dev->can_submit)) { 10866840d2555afd66290be7a39b400b5e66a840b82dAlan Stern rc = -EHOSTUNREACH; 10876840d2555afd66290be7a39b400b5e66a840b82dAlan Stern goto done; 10886840d2555afd66290be7a39b400b5e66a840b82dAlan Stern } 10896840d2555afd66290be7a39b400b5e66a840b82dAlan Stern 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 10919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Check the host controller's state and add the URB to the 10929a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * endpoint's queue. 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10949a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern switch (hcd->state) { 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RUNNING: 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case HC_STATE_RESUMING: 1097eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = 0; 10989a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_add_tail(&urb->urb_list, &urb->ep->urb_list); 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 11019a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern rc = -ESHUTDOWN; 11029a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern goto done; 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern done: 1105e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern return rc; 11079a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1108e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); 11099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1110e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1111e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_check_unlink_urb - check whether an URB may be unlinked 1112e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1113e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being checked for unlinkability 1114e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @status: error code to store in @urb if the unlink succeeds 1115e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1116e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine in their dequeue() 1117e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * method. The HCD's private spinlock must be held and interrupts must 1118e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * be disabled. The actions carried out here are required for making 1119e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * sure than an unlink is valid. 1120e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1121e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Returns 0 for no error, otherwise a negative error code (in which case 1122e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * the dequeue() method must fail). The possible error codes are: 1123e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1124e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EIDRM: @urb was not submitted or has already completed. 1125e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * The completion function may not have been called yet. 1126e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1127e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * -EBUSY: @urb has already been unlinked. 1128e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1129e9df41c5c5899259541dc928872cad4d07b82076Alan Sternint usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, 11309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status) 11319a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11329a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct list_head *tmp; 11339a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 11349a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* insist the urb is still queued */ 11359a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_for_each(tmp, &urb->ep->urb_list) { 11369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (tmp == &urb->urb_list) 11379a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern break; 11389a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 1139e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (tmp != &urb->urb_list) 1140e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EIDRM; 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11429a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Any status except -EINPROGRESS means something already started to 11439a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * unlink this URB from the hardware. So there's no more work to do. 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1145eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 1146e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return -EBUSY; 1147eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern urb->unlinked = status; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11499a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* IRQ setup can easily be broken so that USB controllers 11509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * never get completion IRQs ... maybe even the ones we need to 11519a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * finish unlinking the initial failed usb_set_address() 11529a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * or device descriptor fetch. 11539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 11549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) && 11559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern !is_root_hub(urb->dev)) { 11569a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_warn(hcd->self.controller, "Unlink after no-IRQ? " 11579a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern "Controller is probably using the wrong IRQ.\n"); 11589a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 11599a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 11609a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1161e9df41c5c5899259541dc928872cad4d07b82076Alan Stern return 0; 11629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1163e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); 11649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1165e9df41c5c5899259541dc928872cad4d07b82076Alan Stern/** 1166e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue 1167e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @hcd: host controller to which @urb was submitted 1168e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * @urb: URB being unlinked 1169e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * 1170e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * Host controller drivers should call this routine before calling 1171e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and 1172e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * interrupts must be disabled. The actions carried out here are required 1173e9df41c5c5899259541dc928872cad4d07b82076Alan Stern * for URB completion. 1174e9df41c5c5899259541dc928872cad4d07b82076Alan Stern */ 1175e9df41c5c5899259541dc928872cad4d07b82076Alan Sternvoid usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) 11769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 11779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* clear all state linking urb to this dev (and hcd) */ 1178e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_lock(&hcd_urb_list_lock); 11799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern list_del_init(&urb->urb_list); 1180e9df41c5c5899259541dc928872cad4d07b82076Alan Stern spin_unlock(&hcd_urb_list_lock); 11819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 1182e9df41c5c5899259541dc928872cad4d07b82076Alan SternEXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); 11839a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 1184b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm/* 1185b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Some usb host controllers can only perform dma using a small SRAM area. 1186b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The usb core itself is however optimized for host controllers that can dma 1187b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * using regular system memory - like pci devices doing bus mastering. 1188b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1189b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * To support host controllers with limited dma capabilites we provide dma 1190b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. 1191b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * For this to work properly the host controller code must first use the 1192b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * function dma_declare_coherent_memory() to point out which memory area 1193b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * that should be used for dma allocations. 1194b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1195b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for 1196b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * dma using dma_alloc_coherent() which in turn allocates from the memory 1197b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * area pointed out with dma_declare_coherent_memory(). 1198b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1199b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * So, to summarize... 1200b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1201b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - We need "local" memory, canonical example being 1202b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * a small SRAM on a discrete controller being the 1203b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * only memory that the controller can read ... 1204b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (a) "normal" kernel memory is no good, and 1205b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * (b) there's not enough to share 1206b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1207b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - The only *portable* hook for such stuff in the 1208b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * DMA framework is dma_declare_coherent_memory() 1209b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1210b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * - So we use that, even though the primary requirement 1211b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * is that the memory be "local" (hence addressible 1212b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * by that device), not "coherent". 1213b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * 1214b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1215b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1216b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int hcd_alloc_coherent(struct usb_bus *bus, 1217b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags, dma_addr_t *dma_handle, 1218b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1219b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1220b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1221b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr; 1222b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1223b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), 1224b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm mem_flags, dma_handle); 1225b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (!vaddr) 1226b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return -ENOMEM; 1227b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1228b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm /* 1229b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * Store the virtual address of the buffer at the end 1230b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of the allocated dma buffer. The size of the buffer 1231b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * may be uneven so use unaligned functions instead 1232b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of just rounding up. It makes sense to optimize for 1233b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * memory footprint over access speed since the amount 1234b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm * of memory available for dma may be limited. 1235b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm */ 1236b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm put_unaligned((unsigned long)*vaddr_handle, 1237b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (unsigned long *)(vaddr + size)); 1238b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1239b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_TO_DEVICE) 1240b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1241b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1242b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1243b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1244b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1245b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1246b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, 1247b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm void **vaddr_handle, size_t size, 1248b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir) 1249b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm{ 1250b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm unsigned char *vaddr = *vaddr_handle; 1251b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1252b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); 1253b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1254b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (dir == DMA_FROM_DEVICE) 1255b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm memcpy(vaddr, *vaddr_handle, size); 1256b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1257b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); 1258b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1259b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *vaddr_handle = vaddr; 1260b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm *dma_handle = 0; 1261b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm} 1262b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1263b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Dammstatic int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 1264b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm gfp_t mem_flags) 12659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1266b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1267b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm int ret = 0; 1268b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 12699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* Map the URB's buffers for DMA access. 12709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * Lower level HCD code should use *_dma exclusively, 1271e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * unless it uses pio or talks to another transport, 1272e04748e3a87271fcf30d383e3780c5d3ee1c1618Sarah Sharp * or uses the provided scatter gather list for bulk. 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1274b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1275b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return 0; 1276b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1277b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1278b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 127985e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 1280b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->setup_dma = dma_map_single( 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->setup_packet, 1283b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DMA_TO_DEVICE); 128585e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (dma_mapping_error(hcd->self.controller, 128685e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->setup_dma)) 128785e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger return -EAGAIN; 128885e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger } else if (hcd->driver->flags & HCD_LOCAL_MEM) 1289b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1290b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1291b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1292b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1293b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1294b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1295b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1296b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1297b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1298b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret == 0 && urb->transfer_buffer_length != 0 1299b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 130085e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (hcd->self.uses_dma) { 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_dma = dma_map_single ( 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller, 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer, 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->transfer_buffer_length, 1305b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 130685e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger if (dma_mapping_error(hcd->self.controller, 130785e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger urb->transfer_dma)) 130885e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger return -EAGAIN; 130985e034fdff2af6befc55904f3ab9cc5aa31be8feLarry Finger } else if (hcd->driver->flags & HCD_LOCAL_MEM) { 1310b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm ret = hcd_alloc_coherent( 1311b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->dev->bus, mem_flags, 1312b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_dma, 1313b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1314b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1315b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1316b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1317b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (ret && usb_endpoint_xfer_control(&urb->ep->desc) 1318b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) 1319b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, 1320b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->setup_dma, 1321b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1322b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1323b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1324b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1326b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return ret; 13279a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13299a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternstatic void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) 13309a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 1331b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm enum dma_data_direction dir; 1332b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1333b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (is_root_hub(urb->dev)) 1334b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm return; 1335b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1336b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (usb_endpoint_xfer_control(&urb->ep->desc) 1337b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) { 1338b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 13399a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, urb->setup_dma, 13409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern sizeof(struct usb_ctrlrequest), 13419a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern DMA_TO_DEVICE); 1342b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1343b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->setup_dma, 1344b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm (void **)&urb->setup_packet, 1345b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm sizeof(struct usb_ctrlrequest), 1346b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm DMA_TO_DEVICE); 1347b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1348b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1349b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1350b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (urb->transfer_buffer_length != 0 1351b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { 1352b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (hcd->self.uses_dma) 13539a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dma_unmap_single(hcd->self.controller, 13549a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_dma, 13559a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb->transfer_buffer_length, 1356b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 1357b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm else if (hcd->driver->flags & HCD_LOCAL_MEM) 1358b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm hcd_free_coherent(urb->dev->bus, &urb->transfer_dma, 1359b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm &urb->transfer_buffer, 1360b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm urb->transfer_buffer_length, 1361b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm dir); 13629a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern } 13639a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern} 13649a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13659a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/*-------------------------------------------------------------------------*/ 13669a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13679a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern/* may be called in any context with a valid urb->dev usecount 13689a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * caller surrenders "ownership" of urb 13699a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * expects usb_submit_urb() to have sanity checked and conditioned all 13709a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * inputs in the urb 13719a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13729a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Sternint usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) 13739a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern{ 13749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern int status; 13759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); 13769a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* increment urb's reference count as part of giving it to the HCD 13789a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * (which will control it). HCD guarantees that it either returns 13799a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * an error or calls giveback(), but not both. 13809a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 13819a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_get_urb(urb); 13829a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_inc(&urb->use_count); 13834d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_inc(&urb->dev->urbnum); 13849a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usbmon_urb_submit(&hcd->self, urb); 13859a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 13869a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern /* NOTE requirements on root-hub callers (usbfs and the hub 13879a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * driver, for now): URBs' urb->transfer_buffer must be 13889a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * valid and usb_buffer_{sync,unmap}() not be needed, since 13899a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * they could clobber root hub response data. Also, control 13909a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * URBs must be submitted in process context with interrupts 13919a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern * enabled. 13929a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern */ 1393b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm status = map_urb_for_dma(hcd, urb, mem_flags); 1394b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm if (unlikely(status)) { 1395b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm usbmon_urb_submit_error(&hcd->self, urb, status); 1396b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm goto error; 1397b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm } 1398b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm 1399e9df41c5c5899259541dc928872cad4d07b82076Alan Stern if (is_root_hub(urb->dev)) 1400e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = rh_urb_enqueue(hcd, urb); 1401e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else 1402e9df41c5c5899259541dc928872cad4d07b82076Alan Stern status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); 14039a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern 14049a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern if (unlikely(status)) { 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usbmon_urb_submit_error(&hcd->self, urb, status); 14069a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern unmap_urb_for_dma(hcd, urb); 1407b3476675320eda83cf061a686cdc80b76f2bfdc4Magnus Damm error: 1408b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 14099a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern INIT_LIST_HEAD(&urb->urb_list); 14109a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern atomic_dec(&urb->use_count); 14114d59d8a11383ebf0e0260ee481a4e766959fd7d9Sarah Sharp atomic_dec(&urb->dev->urbnum); 141249367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (atomic_read(&urb->reject)) 14139a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern wake_up(&usb_kill_urb_queue); 14149a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern usb_put_urb(urb); 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* this makes the hcd giveback() the urb more quickly, by kicking it 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * off hardware queues (which may take a while) and returning it as 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * soon as practical. we've already set up the urb's return status, 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but we can't know if the callback completed already. 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1426e9df41c5c5899259541dc928872cad4d07b82076Alan Sternstatic int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value; 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1430809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern if (is_root_hub(urb->dev)) 1431e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = usb_rh_urb_dequeue(hcd, urb, status); 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The only reason an HCD might fail this call is if 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has not yet fully queued the urb to begin with. 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Such failures should be harmless. */ 1437e9df41c5c5899259541dc928872cad4d07b82076Alan Stern value = hcd->driver->urb_dequeue(hcd, urb, status); 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called in any context 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * caller guarantees urb won't be recycled till both unlink() 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and the urb's completion function return 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1448a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Sternint usb_hcd_unlink_urb (struct urb *urb, int status) 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14509a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern struct usb_hcd *hcd; 1451cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern int retval = -EIDRM; 1452cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern unsigned long flags; 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1454cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern /* Prevent the device and bus from going away while 1455cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * the unlink is carried out. If they are already gone 1456cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * then urb->use_count must be 0, since disconnected 1457cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * devices can't have any active URBs. 1458cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1459cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irqsave(&hcd_urb_unlink_lock, flags); 1460cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (atomic_read(&urb->use_count) > 0) { 1461cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = 0; 1462cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_get_dev(urb->dev); 1463cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 1464cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); 1465cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern if (retval == 0) { 1466cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern hcd = bus_to_hcd(urb->dev->bus); 1467cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern retval = unlink1(hcd, urb, status); 1468cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern usb_put_dev(urb->dev); 1469cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern } 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval == 0) 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EINPROGRESS; 1473e9df41c5c5899259541dc928872cad4d07b82076Alan Stern else if (retval != -EIDRM && retval != -EBUSY) 14749a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", 14759a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern urb, retval); 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 148132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/** 148232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * usb_hcd_giveback_urb - return URB from HCD to device driver 148332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @hcd: host controller returning the URB 148432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * @urb: urb being returned to the USB device driver. 14854a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * @status: completion status code for the URB. 148632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * Context: in_interrupt() 148732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * 148832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * This hands the URB from HCD to its USB device driver, using its 148932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * completion function. The HCD has freed all per-urb resources 149032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * (and is done using urb->hcpriv). It also released all HCD locks; 149132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * the device driver won't cause problems if it frees, modifies, 149232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern * or resubmits this URB. 1493eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * 14944a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern * If @urb was unlinked, the value of @status will be overridden by 1495eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * @urb->unlinked. Erroneous short transfers are detected in case 1496eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern * the HCD hasn't checked for them. 149732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern */ 14984a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Sternvoid usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) 149932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 1500b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->hcpriv = NULL; 1501eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (unlikely(urb->unlinked)) 15024a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = urb->unlinked; 1503eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && 1504b0d9efba3ec53468984aecef8eeaf079089f2e5aAlan Stern urb->actual_length < urb->transfer_buffer_length && 15054a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern !status)) 15064a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern status = -EREMOTEIO; 150732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 15081f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern unmap_urb_for_dma(hcd, urb); 15094a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern usbmon_urb_complete(&hcd->self, urb, status); 15101f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern usb_unanchor_urb(urb); 15111f5a3d0f34fd5719081c6b8f3dbbcbe328d4da31Alan Stern 151232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern /* pass ownership to the completion handler */ 15134a00027dcb088bf90fa8fb14a7e8ba3506d78f22Alan Stern urb->status = status; 151432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern urb->complete (urb); 151532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern atomic_dec (&urb->use_count); 151649367d8f1d9f26482cf7089489e90f0afd0a942cMing Lei if (unlikely(atomic_read(&urb->reject))) 151732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern wake_up (&usb_kill_urb_queue); 151832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern usb_put_urb (urb); 151932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 1520782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); 152132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 152232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 152332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 152495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Cancel all URBs pending on this endpoint and wait for the endpoint's 152595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * queue to drain completely. The caller must first insure that no more 152695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * URBs can be submitted for this endpoint. 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 152895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_flush_endpoint(struct usb_device *udev, 1529a6d2bb9ff919b4685bd684620ec7a1ffa8bf2349Alan Stern struct usb_host_endpoint *ep) 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct urb *urb; 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 153495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (!ep) 153595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern return; 15369a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern might_sleep(); 15371720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern hcd = bus_to_hcd(udev->bus); 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 153995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* No more submits can occur */ 15409a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1541ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Sternrescan: 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry (urb, &ep->urb_list, urb_list) { 15435e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern int is_in; 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1545eb23105462304fd35571fd0cab1de7aec79a9ec5Alan Stern if (urb->unlinked) 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_get_urb (urb); 15485e60a16139c2a48b9876b0ff910671eee5fb32ecAlan Stern is_in = usb_urb_dir_in(urb); 1549809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock(&hcd_urb_list_lock); 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1551e9df41c5c5899259541dc928872cad4d07b82076Alan Stern /* kick hcd */ 1552e9df41c5c5899259541dc928872cad4d07b82076Alan Stern unlink1(hcd, urb, -ESHUTDOWN); 1553e9df41c5c5899259541dc928872cad4d07b82076Alan Stern dev_dbg (hcd->self.controller, 1554e9df41c5c5899259541dc928872cad4d07b82076Alan Stern "shutdown urb %p ep%d%s%s\n", 1555e9df41c5c5899259541dc928872cad4d07b82076Alan Stern urb, usb_endpoint_num(&ep->desc), 1556e9df41c5c5899259541dc928872cad4d07b82076Alan Stern is_in ? "in" : "out", 1557e9df41c5c5899259541dc928872cad4d07b82076Alan Stern ({ char *s; 1558e9df41c5c5899259541dc928872cad4d07b82076Alan Stern 1559e9df41c5c5899259541dc928872cad4d07b82076Alan Stern switch (usb_endpoint_type(&ep->desc)) { 1560e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_CONTROL: 1561e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = ""; break; 1562e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_BULK: 1563e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-bulk"; break; 1564e9df41c5c5899259541dc928872cad4d07b82076Alan Stern case USB_ENDPOINT_XFER_INT: 1565e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-intr"; break; 1566e9df41c5c5899259541dc928872cad4d07b82076Alan Stern default: 1567e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s = "-iso"; break; 1568e9df41c5c5899259541dc928872cad4d07b82076Alan Stern }; 1569e9df41c5c5899259541dc928872cad4d07b82076Alan Stern s; 1570e9df41c5c5899259541dc928872cad4d07b82076Alan Stern })); 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_put_urb (urb); 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* list contents may have changed */ 1574ddc1fd6ac1f3ad3275e19451fb07d2eff249161cAlan Stern spin_lock(&hcd_urb_list_lock); 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rescan; 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15779a9bf406df3ce238089d14f4cb41157ca56d8ad3Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 157995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern /* Wait until the endpoint queue is completely empty */ 1580455b25fb209c8241e2163b491228b28667d82c1cAlan Stern while (!list_empty (&ep->urb_list)) { 1581809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_lock_irq(&hcd_urb_list_lock); 1582455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1583455b25fb209c8241e2163b491228b28667d82c1cAlan Stern /* The list may have changed while we acquired the spinlock */ 1584455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = NULL; 1585455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (!list_empty (&ep->urb_list)) { 1586455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb = list_entry (ep->urb_list.prev, struct urb, 1587455b25fb209c8241e2163b491228b28667d82c1cAlan Stern urb_list); 1588455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_get_urb (urb); 1589455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1590809a58b896ba07e771adc76a47c83e4ca1969da8Alan Stern spin_unlock_irq(&hcd_urb_list_lock); 1591455b25fb209c8241e2163b491228b28667d82c1cAlan Stern 1592455b25fb209c8241e2163b491228b28667d82c1cAlan Stern if (urb) { 1593455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_kill_urb (urb); 1594455b25fb209c8241e2163b491228b28667d82c1cAlan Stern usb_put_urb (urb); 1595455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 1596455b25fb209c8241e2163b491228b28667d82c1cAlan Stern } 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15993f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp/** 160070445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds 160170445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * the bus bandwidth 160270445ae6c669865e464307a155e881096e4a0ae7Randy Dunlap * @udev: target &usb_device 16033f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_config: new configuration to install 16043f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @cur_alt: the current alternate interface setting 16053f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * @new_alt: alternate interface setting that is being installed 16063f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16073f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change configurations, pass in the new configuration in new_config, 16083f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass NULL for cur_alt and new_alt. 16093f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16103f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To reset a device's configuration (put the device in the ADDRESSED state), 16113f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in NULL for new_config, cur_alt, and new_alt. 16123f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16133f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * To change alternate interface settings, pass in NULL for new_config, 16143f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * pass in the current alternate interface setting in cur_alt, 16153f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * and pass in the new alternate interface setting in new_alt. 16163f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * 16173f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * Returns an error if the requested bandwidth change exceeds the 16183f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp * bus bandwidth or host controller internal resources. 161979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 16203f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharpint usb_hcd_alloc_bandwidth(struct usb_device *udev, 162179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_config *new_config, 16223f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *cur_alt, 16233f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp struct usb_host_interface *new_alt) 162479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp{ 162579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int num_intfs, i, j; 1626576a362ad2103da481e1f6e13de01f33d3d4c7b1H Hartley Sweeten struct usb_host_interface *alt = NULL; 162779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp int ret = 0; 162879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_hcd *hcd; 162979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp struct usb_host_endpoint *ep; 163079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 163179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd = bus_to_hcd(udev->bus); 163279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (!hcd->driver->check_bandwidth) 163379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 163479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 163579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Configuration is being removed - set configuration 0 */ 16363f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!new_config && !cur_alt) { 163779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 163879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 163979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 164079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 164179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 164279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) 164379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->drop_endpoint(hcd, udev, ep); 164479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->check_bandwidth(hcd, udev); 164679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return 0; 164779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 164879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Check if the HCD says there's enough bandwidth. Enable all endpoints 164979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * each interface's alt setting 0 and ask the HCD to check the bandwidth 165079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * of the bus. There will always be bandwidth for endpoint 0, so it's 165179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * ok to exclude it. 165279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 165379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (new_config) { 165479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp num_intfs = new_config->desc.bNumInterfaces; 165579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp /* Remove endpoints (except endpoint 0, which is always on the 165679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp * schedule) from the old config from the schedule 165779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp */ 165879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 1; i < 16; ++i) { 165979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_out[i]; 166079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 166179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 166279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 166379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 166479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 166579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ep = udev->ep_in[i]; 166679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ep) { 166779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, ep); 166879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 166979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 167079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 167179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 167279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (i = 0; i < num_intfs; ++i) { 167391017f9cf5fcfb601b8d583c896ac7de7d200c57Sarah Sharp /* Set up endpoints for alternate interface setting 0 */ 167491017f9cf5fcfb601b8d583c896ac7de7d200c57Sarah Sharp alt = usb_find_alt_setting(new_config, i, 0); 16753f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (!alt) 16763f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* No alt setting 0? Pick the first setting. */ 16773f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp alt = &new_config->intf_cache[i]->altsetting[0]; 16783f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp 167979abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp for (j = 0; j < alt->desc.bNumEndpoints; j++) { 168079abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); 168179abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 168279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp goto reset; 168379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 168479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 168579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp } 16863f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (cur_alt && new_alt) { 16873f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Drop all the endpoints in the current alt setting */ 16883f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { 16893f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->drop_endpoint(hcd, udev, 16903f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &cur_alt->endpoint[i]); 16913f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 16923f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 16933f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 16943f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp /* Add all the endpoints in the new alt setting */ 16953f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { 16963f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp ret = hcd->driver->add_endpoint(hcd, udev, 16973f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp &new_alt->endpoint[i]); 16983f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp if (ret < 0) 16993f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp goto reset; 17003f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 17013f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp } 170279abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp ret = hcd->driver->check_bandwidth(hcd, udev); 170379abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharpreset: 170479abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp if (ret < 0) 170579abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp hcd->driver->reset_bandwidth(hcd, udev); 170679abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp return ret; 170779abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp} 170879abb1ab13cee5ba488210798b6e7bbae0b391acSarah Sharp 170995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern/* Disables the endpoint: synchronizes with the hcd to make sure all 171095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must 171195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * have been called previously. Use for set_configuration, set_interface, 171295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * driver removal, physical disconnect. 171395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * 171495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * example: a qh stored in ep->hcpriv, holding state related to endpoint 171595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern * type, maxpacket size, toggle, halt status, and scheduling. 171695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern */ 171795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Sternvoid usb_hcd_disable_endpoint(struct usb_device *udev, 171895cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_host_endpoint *ep) 171995cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern{ 172095cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern struct usb_hcd *hcd; 172195cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 172295cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern might_sleep(); 172395cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd = bus_to_hcd(udev->bus); 172495cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern if (hcd->driver->endpoint_disable) 172595cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern hcd->driver->endpoint_disable(hcd, ep); 172695cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern} 172795cf82f99cfbd697c15572c444bd4f54f19745b0Alan Stern 17283444b26afa145148951112534f298bdc554ec789David Vrabel/** 17293444b26afa145148951112534f298bdc554ec789David Vrabel * usb_hcd_reset_endpoint - reset host endpoint state 17303444b26afa145148951112534f298bdc554ec789David Vrabel * @udev: USB device. 17313444b26afa145148951112534f298bdc554ec789David Vrabel * @ep: the endpoint to reset. 17323444b26afa145148951112534f298bdc554ec789David Vrabel * 17333444b26afa145148951112534f298bdc554ec789David Vrabel * Resets any host endpoint state such as the toggle bit, sequence 17343444b26afa145148951112534f298bdc554ec789David Vrabel * number and current window. 17353444b26afa145148951112534f298bdc554ec789David Vrabel */ 17363444b26afa145148951112534f298bdc554ec789David Vrabelvoid usb_hcd_reset_endpoint(struct usb_device *udev, 17373444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_host_endpoint *ep) 17383444b26afa145148951112534f298bdc554ec789David Vrabel{ 17393444b26afa145148951112534f298bdc554ec789David Vrabel struct usb_hcd *hcd = bus_to_hcd(udev->bus); 17403444b26afa145148951112534f298bdc554ec789David Vrabel 17413444b26afa145148951112534f298bdc554ec789David Vrabel if (hcd->driver->endpoint_reset) 17423444b26afa145148951112534f298bdc554ec789David Vrabel hcd->driver->endpoint_reset(hcd, ep); 17433444b26afa145148951112534f298bdc554ec789David Vrabel else { 17443444b26afa145148951112534f298bdc554ec789David Vrabel int epnum = usb_endpoint_num(&ep->desc); 17453444b26afa145148951112534f298bdc554ec789David Vrabel int is_out = usb_endpoint_dir_out(&ep->desc); 17463444b26afa145148951112534f298bdc554ec789David Vrabel int is_control = usb_endpoint_xfer_control(&ep->desc); 17473444b26afa145148951112534f298bdc554ec789David Vrabel 17483444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, is_out, 0); 17493444b26afa145148951112534f298bdc554ec789David Vrabel if (is_control) 17503444b26afa145148951112534f298bdc554ec789David Vrabel usb_settoggle(udev, epnum, !is_out, 0); 17513444b26afa145148951112534f298bdc554ec789David Vrabel } 17523444b26afa145148951112534f298bdc554ec789David Vrabel} 17533444b26afa145148951112534f298bdc554ec789David Vrabel 1754cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern/* Protect against drivers that try to unlink URBs after the device 1755cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * is gone, by waiting until all unlinks for @udev are finished. 1756cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * Since we don't currently track URBs by device, simply wait until 1757cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern * nothing is running in the locked region of usb_hcd_unlink_urb(). 1758cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern */ 1759cde217a556ec552d28ac9e136c5a94684a69ae94Alan Sternvoid usb_hcd_synchronize_unlinks(struct usb_device *udev) 1760cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern{ 1761cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_lock_irq(&hcd_urb_unlink_lock); 1762cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern spin_unlock_irq(&hcd_urb_unlink_lock); 1763cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern} 1764cde217a556ec552d28ac9e136c5a94684a69ae94Alan Stern 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 176732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/* called in any context */ 176832aca5600526189dd876e6c92b64fd88cf052c8dAlan Sternint usb_hcd_get_frame_number (struct usb_device *udev) 176932aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern{ 177032aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern struct usb_hcd *hcd = bus_to_hcd(udev->bus); 177132aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 177232aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern if (!HC_IS_RUNNING (hcd->state)) 177332aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return -ESHUTDOWN; 177432aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern return hcd->driver->get_frame_number (hcd); 177532aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern} 177632aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 177732aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern/*-------------------------------------------------------------------------*/ 177832aca5600526189dd876e6c92b64fd88cf052c8dAlan Stern 17799293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell#ifdef CONFIG_PM 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 178165bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1783686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1784686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1785686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int old_state = hcd->state; 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1787686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s%s\n", 178865bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); 1789686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (!hcd->driver->bus_suspend) { 1790686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = -ENOENT; 1791686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1792686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = HC_STATE_QUIESCING; 1793686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_suspend(hcd); 1794686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 1795686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1796686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, USB_STATE_SUSPENDED); 17979293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_SUSPENDED; 1798686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1799686314cfbdac21c9019c0e04487b5d940db62406Alan Stern hcd->state = old_state; 1800686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 18019293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "suspend", status); 1802686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } 18039293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 180665bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Sternint hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1808686314cfbdac21c9019c0e04487b5d940db62406Alan Stern struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); 1809686314cfbdac21c9019c0e04487b5d940db62406Alan Stern int status; 1810cfa59dab27d1b282886e7772a8f9548236883892Alan Stern int old_state = hcd->state; 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1812686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "usb %s%s\n", 181365bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); 18140c0382e32d46f606951010b202382be14d180a17Alan Stern if (!hcd->driver->bus_resume) 18159293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return -ENOENT; 1816979d5199fee9e80290ddeb532e5993bd15506712David Brownell if (hcd->state == HC_STATE_RUNNING) 1817979d5199fee9e80290ddeb532e5993bd15506712David Brownell return 0; 1818686314cfbdac21c9019c0e04487b5d940db62406Alan Stern 18199293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RESUMING; 1820686314cfbdac21c9019c0e04487b5d940db62406Alan Stern status = hcd->driver->bus_resume(hcd); 1821686314cfbdac21c9019c0e04487b5d940db62406Alan Stern if (status == 0) { 1822686314cfbdac21c9019c0e04487b5d940db62406Alan Stern /* TRSMRCY = 10 msec */ 1823686314cfbdac21c9019c0e04487b5d940db62406Alan Stern msleep(10); 1824686314cfbdac21c9019c0e04487b5d940db62406Alan Stern usb_set_device_state(rhdev, rhdev->actconfig 1825686314cfbdac21c9019c0e04487b5d940db62406Alan Stern ? USB_STATE_CONFIGURED 1826686314cfbdac21c9019c0e04487b5d940db62406Alan Stern : USB_STATE_ADDRESS); 18279293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell hcd->state = HC_STATE_RUNNING; 1828686314cfbdac21c9019c0e04487b5d940db62406Alan Stern } else { 1829cfa59dab27d1b282886e7772a8f9548236883892Alan Stern hcd->state = old_state; 1830686314cfbdac21c9019c0e04487b5d940db62406Alan Stern dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", 18319293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell "resume", status); 1832cfa59dab27d1b282886e7772a8f9548236883892Alan Stern if (status != -ESHUTDOWN) 1833cfa59dab27d1b282886e7772a8f9548236883892Alan Stern usb_hc_died(hcd); 18349293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell } 18359293677af3dace2645dec0d0808efa02d36bf47bDavid Brownell return status; 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18386b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern/* Workqueue routine for root-hub remote wakeup */ 18396b157c9bf3bace6eeb4a973da63923ef24995cceAlan Sternstatic void hcd_resume_work(struct work_struct *work) 18406b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern{ 18416b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); 18426b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern struct usb_device *udev = hcd->self.root_hub; 18436b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 18446b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_lock_device(udev); 18451941044aa9632aa8debbb94a3c8a5ed0ebddade8Alan Stern usb_mark_last_busy(udev); 184665bfd2967c906ca322a4bb69a285fe0de8916ac6Alan Stern usb_external_resume_device(udev, PMSG_REMOTE_RESUME); 18476b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern usb_unlock_device(udev); 18486b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern} 18496b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_resume_root_hub - called by HCD to resume its root hub 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: host controller for this root hub 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The USB host controller calls this function when its root hub is 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * suspended (with the remote wakeup feature enabled) and a remote 18566b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * wakeup request is received. The routine submits a workqueue request 18576b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern * to resume the root hub (that is, manage its downstream ports again). 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hcd_resume_root_hub (struct usb_hcd *hcd) 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) 18656b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern queue_work(ksuspend_usb_wq, &hcd->wakeup_work); 18661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 18671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18689293677af3dace2645dec0d0808efa02d36bf47bDavid BrownellEXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); 18691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_OTG 18751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_bus_start_enum - start immediate enumeration (for OTG) 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus: the bus (must use hcd framework) 18791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @port_num: 1-based number of port; usually bus->otg_port 18801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: in_interrupt() 18811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 18821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Starts enumeration, with an immediate reset followed later by 18831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * khubd identifying and possibly configuring the device. 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is needed by OTG controller drivers, where it helps meet 18851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HNP protocol timing requirements for starting a port reset. 18861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) 18881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 18901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status = -EOPNOTSUPP; 18911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTE: since HNP can't start by grabbing the bus's address0_sem, 18931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * boards with root hubs hooked up to internal devices (instead of 18941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * just the OTG port) may need more attention to resetting... 18951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 18961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd = container_of (bus, struct usb_hcd, self); 18971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port_num && hcd->driver->start_port_reset) 18981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = hcd->driver->start_port_reset(hcd, port_num); 18991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* run khubd shortly after (first) root port reset finishes; 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it may issue others, until at least 50 msecs have passed. 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status == 0) 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1907782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_bus_start_enum); 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 19101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hcd_irq - hook IRQs to HCD framework (bus glue) 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irq: the IRQ being raised 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @__hcd: pointer to the HCD whose IRQ is being signaled 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If the controller isn't HALTed, calls the driver's irq handler. 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Checks whether the controller is now dead. 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19217d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsirqreturn_t usb_hcd_irq (int irq, void *__hcd) 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd = __hcd; 1924de85422b94ddb23c021126815ea49414047c13dcStefan Becker unsigned long flags; 1925de85422b94ddb23c021126815ea49414047c13dcStefan Becker irqreturn_t rc; 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1927de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work correctly with shared IRQs 1928de85422b94ddb23c021126815ea49414047c13dcStefan Becker * when the first handler doesn't use it. So let's just 1929de85422b94ddb23c021126815ea49414047c13dcStefan Becker * assume it's never used. 1930de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 1931de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_save(flags); 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1933de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT || 1934de85422b94ddb23c021126815ea49414047c13dcStefan Becker !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) { 1935de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1936de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else if (hcd->driver->irq(hcd) == IRQ_NONE) { 1937de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_NONE; 1938de85422b94ddb23c021126815ea49414047c13dcStefan Becker } else { 1939de85422b94ddb23c021126815ea49414047c13dcStefan Becker set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); 19408de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 1941de85422b94ddb23c021126815ea49414047c13dcStefan Becker if (unlikely(hcd->state == HC_STATE_HALT)) 1942de85422b94ddb23c021126815ea49414047c13dcStefan Becker usb_hc_died(hcd); 1943de85422b94ddb23c021126815ea49414047c13dcStefan Becker rc = IRQ_HANDLED; 1944de85422b94ddb23c021126815ea49414047c13dcStefan Becker } 1945de85422b94ddb23c021126815ea49414047c13dcStefan Becker 1946de85422b94ddb23c021126815ea49414047c13dcStefan Becker local_irq_restore(flags); 1947de85422b94ddb23c021126815ea49414047c13dcStefan Becker return rc; 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_hc_died - report abnormal shutdown of a host controller (bus glue) 19541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: pointer to the HCD representing the controller 19551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This is called by bus glue to report a USB host controller that died 19571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * while operations may still have been pending. It's called automatically 19581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the PCI glue, so only glue for non-PCI busses should need to call it. 19591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_hc_died (struct usb_hcd *hcd) 19611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err (hcd->self.controller, "HC died; cleaning up\n"); 19651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&hcd_root_hub_lock, flags); 19671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rh_registered) { 1968d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->poll_rh = 0; 19691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* make khubd clean up old urbs and devices */ 19711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_device_state (hcd->self.root_hub, 19721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_STATE_NOTATTACHED); 19731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kick_khubd (hcd->self.root_hub); 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&hcd_root_hub_lock, flags); 19761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_hc_died); 19781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_create_hcd - create and initialize an HCD structure 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @driver: HC driver that will use this hcd 19841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @dev: device for this HC, stored in hcd->self.controller 19851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @bus_name: value to store in hcd->self.bus_name 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 19871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a struct usb_hcd, with extra space at the end for the 19891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * HC driver's private data. Initialize the generic members of the 19901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hcd structure. 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If memory is unavailable, returns NULL. 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_hcd *usb_create_hcd (const struct hc_driver *driver, 19951b26da1510c02a2dac33c0ea48904256dcec4617Greg Kroah-Hartman struct device *dev, const char *bus_name) 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_hcd *hcd; 19981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19997b842b6e3704f4b9606ff8a4ffe03579d9addf5ePekka Enberg hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); 20001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!hcd) { 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg (dev, "hcd alloc failed\n"); 20021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 20031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(dev, hcd); 20051720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_init(&hcd->kref); 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_bus_init(&hcd->self); 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.controller = dev; 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->self.bus_name = bus_name; 2010dd990f16a39d4e615c0b70a0ab50b79b32bfb16dAlan Stern hcd->self.uses_dma = (dev->dma_mask != NULL); 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&hcd->rh_timer); 2013d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.function = rh_timer_func; 2014d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern hcd->rh_timer.data = (unsigned long) hcd; 20156b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 20166b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern INIT_WORK(&hcd->wakeup_work, hcd_resume_work); 20176b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 20183f0479e00a3fca9590ae8d9edc4e9c47b7fa0610Sarah Sharp mutex_init(&hcd->bandwidth_mutex); 20191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver = driver; 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->product_desc = (driver->product_desc) ? driver->product_desc : 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "USB Host Controller"; 20231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return hcd; 20241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2025782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_create_hcd); 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20271720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstatic void hcd_release (struct kref *kref) 20281720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 20291720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); 20301720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 20311720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kfree(hcd); 20321720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 20331720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 20341720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Sternstruct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) 20351720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern{ 20361720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 20371720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_get (&hcd->kref); 20381720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern return hcd; 20391720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern} 2040782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_get_hcd); 20411720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_put_hcd (struct usb_hcd *hcd) 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20441720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern if (hcd) 20451720058343fa43a1a25bfad9e62ea06e7e9743b6Alan Stern kref_put (&hcd->kref, hcd_release); 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2047782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_put_hcd); 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_add_hcd - finish generic HCD structure initialization and register 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to initialize 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqnum: Interrupt line to allocate 20531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @irqflags: Interrupt type flags 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finish the remaining parts of generic HCD initialization: allocate the 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffers of consistent memory, register the bus, request the IRQ line, 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and call the driver's reset() and start() routines. 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_add_hcd(struct usb_hcd *hcd, 20601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irqnum, unsigned long irqflags) 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20628ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern int retval; 20638ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern struct usb_device *rhdev; 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s\n", hcd->product_desc); 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20675234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez hcd->authorized_default = hcd->wireless? 0 : 1; 20688de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 20698de98402652c01839ae321be6cb3054cf5735d83Benjamin Herrenschmidt 2070b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* HC is in reset state, but accessible. Now do the one-time init, 2071b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * bottom up so that hcds can customize the root hubs before khubd 2072b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * starts talking to them. (Note, bus id is assigned early too.) 2073b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd_buffer_create(hcd)) != 0) { 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "pool alloc failed\n"); 20761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 20771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = usb_register_bus(&hcd->self)) < 0) 20808ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_bus; 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2082b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { 2083b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "unable to allocate root hub\n"); 2084b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell retval = -ENOMEM; 2085b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_allocate_root_hub; 2086b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 20876b403b020c1f42180b14d28d832da61167cff822Sarah Sharp 20886b403b020c1f42180b14d28d832da61167cff822Sarah Sharp switch (hcd->driver->flags & HCD_MASK) { 20896b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB11: 20906b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_FULL; 20916b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20926b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB2: 20936b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_HIGH; 20946b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20956b403b020c1f42180b14d28d832da61167cff822Sarah Sharp case HCD_USB3: 20966b403b020c1f42180b14d28d832da61167cff822Sarah Sharp rhdev->speed = USB_SPEED_SUPER; 20976b403b020c1f42180b14d28d832da61167cff822Sarah Sharp break; 20986b403b020c1f42180b14d28d832da61167cff822Sarah Sharp default: 20996b403b020c1f42180b14d28d832da61167cff822Sarah Sharp goto err_allocate_root_hub; 21006b403b020c1f42180b14d28d832da61167cff822Sarah Sharp } 2101b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = rhdev; 2102b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2103db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell /* wakeup flag init defaults to "everything works" for root hubs, 2104db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * but drivers can override it in reset() if needed, along with 2105db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell * recording the overall controller's system wakeup capability. 2106db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell */ 2107db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell device_init_wakeup(&rhdev->dev, 1); 2108db4cefaaea4c6d67cdaebfd315abc791c5c9d22fDavid Brownell 2109b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* "reset" is misnamed; its role is now one-time init. the controller 2110b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell * should already have been reset (and boot firmware kicked off etc). 2111b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell */ 2112b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { 2113b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_err(hcd->self.controller, "can't setup\n"); 2114b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell goto err_hcd_driver_setup; 2115b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell } 2116b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2117fb669cc01ed778c4926f395e44a9b61644597d38David Brownell /* NOTE: root hub and controller capabilities may not be the same */ 2118fb669cc01ed778c4926f395e44a9b61644597d38David Brownell if (device_can_wakeup(hcd->self.controller) 2119fb669cc01ed778c4926f395e44a9b61644597d38David Brownell && device_can_wakeup(&hcd->self.root_hub->dev)) 2120b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); 2121b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell 2122b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* enable irqs just before we start the controller */ 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->driver->irq) { 2124de85422b94ddb23c021126815ea49414047c13dcStefan Becker 2125de85422b94ddb23c021126815ea49414047c13dcStefan Becker /* IRQF_DISABLED doesn't work as advertised when used together 2126de85422b94ddb23c021126815ea49414047c13dcStefan Becker * with IRQF_SHARED. As usb_hcd_irq() will always disable 2127de85422b94ddb23c021126815ea49414047c13dcStefan Becker * interrupts we can remove it here. 2128de85422b94ddb23c021126815ea49414047c13dcStefan Becker */ 212983a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand if (irqflags & IRQF_SHARED) 213083a798207361cc26385187b2e71efa2b5d75de7fGeoff Levand irqflags &= ~IRQF_DISABLED; 2131de85422b94ddb23c021126815ea49414047c13dcStefan Becker 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", 21331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->description, hcd->self.busnum); 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq_descr, hcd)) != 0) { 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, 2137c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller "request interrupt %d failed\n", irqnum); 21388ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_request_irq; 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = irqnum; 2141c6387a48cf5958e43c201fc27a158c328927531aDavid S. Miller dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->irq = -1; 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->rsrc_start) 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "%s 0x%08llx\n", 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hcd->driver->flags & HCD_MEMORY) ? 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "io mem" : "io base", 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long)hcd->rsrc_start); 21521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((retval = hcd->driver->start(hcd)) < 0) { 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(hcd->self.controller, "startup error %d\n", retval); 21568ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_hcd_driver_start; 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2159b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell /* starting here, usbcore will pay attention to this root hub */ 216055c527187c9d78f840b284d596a0b298bc1493afAlan Stern rhdev->bus_mA = min(500u, hcd->power_budget); 2161b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell if ((retval = register_root_hub(hcd)) != 0) 21628ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern goto err_register_root_hub; 21638ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern 21645234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); 21655234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez if (retval < 0) { 21665234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", 21675234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez retval); 21685234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez goto error_create_attr_group; 21695234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez } 2170d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern if (hcd->uses_new_polling && hcd->poll_rh) 2171d5926ae7a827bdd06b588ffbc56fd4525cd9214aAlan Stern usb_hcd_poll_rh_status(hcd); 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21745234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalezerror_create_attr_group: 21755234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_lock(&usb_bus_list_lock); 21765234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez usb_disconnect(&hcd->self.root_hub); 21775234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez mutex_unlock(&usb_bus_list_lock); 2178b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_root_hub: 21798ec8d20b21f00a36343ca0ebd6c6be9421724a1eAlan Stern hcd->driver->stop(hcd); 2180b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_start: 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(irqnum, hcd); 2183b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_request_irq: 2184b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_hcd_driver_setup: 2185b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell hcd->self.root_hub = NULL; 2186b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownell usb_put_dev(rhdev); 2187b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_allocate_root_hub: 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 2189b1e8f0a6a8805c971857cd10a65cf8caa4c1a672David Brownellerr_register_bus: 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2193782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_add_hcd); 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/** 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * usb_remove_hcd - shutdown processing for generic HCDs 21971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * @hcd: the usb_hcd structure to remove 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Context: !in_interrupt() 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Disconnects the root hub, then reverses the effects of usb_add_hcd(), 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * invoking the HCD's stop() method. 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_remove_hcd(struct usb_hcd *hcd) 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (HC_IS_RUNNING (hcd->state)) 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_QUIESCING; 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq (&hcd_root_hub_lock); 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->rh_registered = 0; 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq (&hcd_root_hub_lock); 22149ad3d6ccf5eee285e233dbaf186369b8d477a666Alan Stern 22156b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#ifdef CONFIG_PM 2216d5d4db704b962773c03ee3beb3258b6450611e66Alan Stern cancel_work_sync(&hcd->wakeup_work); 22176b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern#endif 22186b157c9bf3bace6eeb4a973da63923ef24995cceAlan Stern 22195234ce1b02ae2574098ebe9839dcf241076a9367Inaky Perez-Gonzalez sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); 22204186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_lock(&usb_bus_list_lock); 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_disconnect(&hcd->self.root_hub); 22224186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven mutex_unlock(&usb_bus_list_lock); 22231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->driver->stop(hcd); 22251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd->state = HC_STATE_HALT; 22261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22271b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern hcd->poll_rh = 0; 22281b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern del_timer_sync(&hcd->rh_timer); 22291b42ae6d4355328dc4406b6f0188adcf8c566435Alan Stern 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hcd->irq >= 0) 22311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds free_irq(hcd->irq, hcd); 22321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister_bus(&hcd->self); 22331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hcd_buffer_destroy(hcd); 22341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2235782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_remove_hcd); 22361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 223764a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovvoid 223864a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelovusb_hcd_platform_shutdown(struct platform_device* dev) 223964a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov{ 224064a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov struct usb_hcd *hcd = platform_get_drvdata(dev); 224164a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 224264a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov if (hcd->driver->shutdown) 224364a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov hcd->driver->shutdown(hcd); 224464a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov} 2245782e70c6fc2290a0395850e8e02583b8b62264d8Greg Kroah-HartmanEXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); 224664a21d025d3a979a8715f2ec7acabca7b5406c8aAleksey Gorelov 22471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 22481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2249f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) 22501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct usb_mon_operations *mon_ops; 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 22541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The registration is unlocked. 22551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We do it this way because we do not want to lock in hot paths. 22561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 22571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notice that the code is minimally error-proof. Because usbmon needs 22581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. 22591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 22601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint usb_mon_register (struct usb_mon_operations *ops) 22621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops) 22651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 22661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = ops; 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 22691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_register); 22721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_mon_deregister (void) 22741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mon_ops == NULL) { 22771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR "USB: monitor was not registered\n"); 22781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 22791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mon_ops = NULL; 22811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mb(); 22821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL_GPL (usb_mon_deregister); 22841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2285f150fa1afbf69a87f54752579ff2bb769aad88b3Pete Zaitcev#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ 2286