Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright Linus Torvalds 1999 |
| 3 | * (C) Copyright Johannes Erdfelt 1999-2001 |
| 4 | * (C) Copyright Andreas Gal 1999 |
| 5 | * (C) Copyright Gregory P. Smith 1999 |
| 6 | * (C) Copyright Deti Fliegl 1999 |
| 7 | * (C) Copyright Randy Dunlap 2000 |
| 8 | * (C) Copyright David Brownell 2000-2002 |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 17 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 18 | * for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software Foundation, |
| 22 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
Sebastian Andrzej Siewior | b53d657 | 2012-09-07 14:31:45 +0200 | [diff] [blame] | 25 | #include <linux/bcd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | #include <linux/version.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/completion.h> |
| 31 | #include <linux/utsname.h> |
| 32 | #include <linux/mm.h> |
| 33 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/device.h> |
| 35 | #include <linux/dma-mapping.h> |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 36 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <asm/irq.h> |
| 38 | #include <asm/byteorder.h> |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 39 | #include <asm/unaligned.h> |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 40 | #include <linux/platform_device.h> |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 41 | #include <linux/workqueue.h> |
Alan Stern | da0aa71 | 2013-01-25 17:09:42 -0500 | [diff] [blame] | 42 | #include <linux/pm_runtime.h> |
Matthias Beyer | 059239a | 2013-10-05 23:09:15 +0200 | [diff] [blame] | 43 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 45 | #include <linux/phy/phy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 47 | #include <linux/usb/hcd.h> |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 48 | #include <linux/usb/phy.h> |
Baoyou Xie | 35be784 | 2016-09-23 21:44:13 +0800 | [diff] [blame] | 49 | #include <linux/usb/otg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #include "usb.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | /*-------------------------------------------------------------------------*/ |
| 55 | |
| 56 | /* |
| 57 | * USB Host Controller Driver framework |
| 58 | * |
| 59 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing |
| 60 | * HCD-specific behaviors/bugs. |
| 61 | * |
| 62 | * This does error checks, tracks devices and urbs, and delegates to a |
| 63 | * "hc_driver" only for code (and data) that really needs to know about |
| 64 | * hardware differences. That includes root hub registers, i/o queues, |
| 65 | * and so on ... but as little else as possible. |
| 66 | * |
| 67 | * Shared code includes most of the "root hub" code (these are emulated, |
| 68 | * though each HC's hardware works differently) and PCI glue, plus request |
| 69 | * tracking overhead. The HCD code should only block on spinlocks or on |
| 70 | * hardware handshaking; blocking on software events (such as other kernel |
| 71 | * threads releasing resources, or completing actions) is all generic. |
| 72 | * |
| 73 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", |
| 74 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used |
| 75 | * only by the hub driver ... and that neither should be seen or used by |
| 76 | * usb client device drivers. |
| 77 | * |
| 78 | * Contributors of ideas or unattributed patches include: David Brownell, |
| 79 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... |
| 80 | * |
| 81 | * HISTORY: |
| 82 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some |
| 83 | * associated cleanup. "usb_hcd" still != "usb_bus". |
| 84 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. |
| 85 | */ |
| 86 | |
| 87 | /*-------------------------------------------------------------------------*/ |
| 88 | |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 89 | /* Keep track of which host controller drivers are loaded */ |
| 90 | unsigned long usb_hcds_loaded; |
| 91 | EXPORT_SYMBOL_GPL(usb_hcds_loaded); |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | /* host controllers we manage */ |
Heiner Kallweit | 5363de7 | 2016-01-25 20:30:30 +0100 | [diff] [blame] | 94 | DEFINE_IDR (usb_bus_idr); |
| 95 | EXPORT_SYMBOL_GPL (usb_bus_idr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | /* used when allocating bus numbers */ |
| 98 | #define USB_MAXBUS 64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | /* used when updating list of hcds */ |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 101 | DEFINE_MUTEX(usb_bus_idr_lock); /* exported only for usbfs */ |
| 102 | EXPORT_SYMBOL_GPL (usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | /* used for controlling access to virtual root hubs */ |
| 105 | static DEFINE_SPINLOCK(hcd_root_hub_lock); |
| 106 | |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 107 | /* used when updating an endpoint's URB list */ |
| 108 | static DEFINE_SPINLOCK(hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 110 | /* used to protect against unlinking URBs after the device is gone */ |
| 111 | static DEFINE_SPINLOCK(hcd_urb_unlink_lock); |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | /* wait queue for synchronous unlinks */ |
| 114 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); |
| 115 | |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 116 | static inline int is_root_hub(struct usb_device *udev) |
| 117 | { |
| 118 | return (udev->parent == NULL); |
| 119 | } |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /*-------------------------------------------------------------------------*/ |
| 122 | |
| 123 | /* |
| 124 | * Sharable chunks of root hub code. |
| 125 | */ |
| 126 | |
| 127 | /*-------------------------------------------------------------------------*/ |
Sebastian Andrzej Siewior | b53d657 | 2012-09-07 14:31:45 +0200 | [diff] [blame] | 128 | #define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff)) |
| 129 | #define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Mathias Nyman | 9508e3b | 2015-12-10 09:59:28 +0200 | [diff] [blame] | 131 | /* usb 3.1 root hub device descriptor */ |
| 132 | static const u8 usb31_rh_dev_descriptor[18] = { |
| 133 | 0x12, /* __u8 bLength; */ |
| 134 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
| 135 | 0x10, 0x03, /* __le16 bcdUSB; v3.1 */ |
| 136 | |
| 137 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 138 | 0x00, /* __u8 bDeviceSubClass; */ |
| 139 | 0x03, /* __u8 bDeviceProtocol; USB 3 hub */ |
| 140 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ |
| 141 | |
| 142 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
| 143 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ |
| 144 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 145 | |
| 146 | 0x03, /* __u8 iManufacturer; */ |
| 147 | 0x02, /* __u8 iProduct; */ |
| 148 | 0x01, /* __u8 iSerialNumber; */ |
| 149 | 0x01 /* __u8 bNumConfigurations; */ |
| 150 | }; |
| 151 | |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 152 | /* usb 3.0 root hub device descriptor */ |
| 153 | static const u8 usb3_rh_dev_descriptor[18] = { |
| 154 | 0x12, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 155 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 156 | 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ |
| 157 | |
| 158 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 159 | 0x00, /* __u8 bDeviceSubClass; */ |
| 160 | 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ |
| 161 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ |
| 162 | |
Paul Bolle | bfb8bfa | 2012-05-05 13:16:51 +0200 | [diff] [blame] | 163 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
Alan Stern | cd78069 | 2010-02-25 13:19:37 -0500 | [diff] [blame] | 164 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 165 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 166 | |
| 167 | 0x03, /* __u8 iManufacturer; */ |
| 168 | 0x02, /* __u8 iProduct; */ |
| 169 | 0x01, /* __u8 iSerialNumber; */ |
| 170 | 0x01 /* __u8 bNumConfigurations; */ |
| 171 | }; |
| 172 | |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 173 | /* usb 2.5 (wireless USB 1.0) root hub device descriptor */ |
| 174 | static const u8 usb25_rh_dev_descriptor[18] = { |
| 175 | 0x12, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 176 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 177 | 0x50, 0x02, /* __le16 bcdUSB; v2.5 */ |
| 178 | |
| 179 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 180 | 0x00, /* __u8 bDeviceSubClass; */ |
| 181 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
| 182 | 0xFF, /* __u8 bMaxPacketSize0; always 0xFF (WUSB Spec 7.4.1). */ |
| 183 | |
| 184 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
| 185 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
| 186 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 187 | |
| 188 | 0x03, /* __u8 iManufacturer; */ |
| 189 | 0x02, /* __u8 iProduct; */ |
| 190 | 0x01, /* __u8 iSerialNumber; */ |
| 191 | 0x01 /* __u8 bNumConfigurations; */ |
| 192 | }; |
| 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | /* usb 2.0 root hub device descriptor */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 195 | static const u8 usb2_rh_dev_descriptor[18] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | 0x12, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 197 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ |
| 199 | |
| 200 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 201 | 0x00, /* __u8 bDeviceSubClass; */ |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 202 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
Alan Stern | 16f16d1 | 2005-10-24 15:41:19 -0400 | [diff] [blame] | 203 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Paul Bolle | bfb8bfa | 2012-05-05 13:16:51 +0200 | [diff] [blame] | 205 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
Greg Kroah-Hartman | 667d691 | 2008-01-28 09:50:12 -0800 | [diff] [blame] | 206 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 208 | |
| 209 | 0x03, /* __u8 iManufacturer; */ |
| 210 | 0x02, /* __u8 iProduct; */ |
| 211 | 0x01, /* __u8 iSerialNumber; */ |
| 212 | 0x01 /* __u8 bNumConfigurations; */ |
| 213 | }; |
| 214 | |
| 215 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ |
| 216 | |
| 217 | /* usb 1.1 root hub device descriptor */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 218 | static const u8 usb11_rh_dev_descriptor[18] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | 0x12, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 220 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ |
| 222 | |
| 223 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 224 | 0x00, /* __u8 bDeviceSubClass; */ |
| 225 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ |
Alan Stern | 16f16d1 | 2005-10-24 15:41:19 -0400 | [diff] [blame] | 226 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Paul Bolle | bfb8bfa | 2012-05-05 13:16:51 +0200 | [diff] [blame] | 228 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
Greg Kroah-Hartman | 667d691 | 2008-01-28 09:50:12 -0800 | [diff] [blame] | 229 | 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 231 | |
| 232 | 0x03, /* __u8 iManufacturer; */ |
| 233 | 0x02, /* __u8 iProduct; */ |
| 234 | 0x01, /* __u8 iSerialNumber; */ |
| 235 | 0x01 /* __u8 bNumConfigurations; */ |
| 236 | }; |
| 237 | |
| 238 | |
| 239 | /*-------------------------------------------------------------------------*/ |
| 240 | |
| 241 | /* Configuration descriptors for our root hubs */ |
| 242 | |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 243 | static const u8 fs_rh_config_descriptor[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | /* one configuration */ |
| 246 | 0x09, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 247 | USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | 0x19, 0x00, /* __le16 wTotalLength; */ |
| 249 | 0x01, /* __u8 bNumInterfaces; (1) */ |
| 250 | 0x01, /* __u8 bConfigurationValue; */ |
| 251 | 0x00, /* __u8 iConfiguration; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 252 | 0xc0, /* __u8 bmAttributes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | Bit 7: must be set, |
| 254 | 6: Self-powered, |
| 255 | 5: Remote wakeup, |
| 256 | 4..0: resvd */ |
| 257 | 0x00, /* __u8 MaxPower; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | /* USB 1.1: |
| 260 | * USB 2.0, single TT organization (mandatory): |
| 261 | * one interface, protocol 0 |
| 262 | * |
| 263 | * USB 2.0, multiple TT organization (optional): |
| 264 | * two interfaces, protocols 1 (like single TT) |
| 265 | * and 2 (multiple TT mode) ... config is |
| 266 | * sometimes settable |
| 267 | * NOT IMPLEMENTED |
| 268 | */ |
| 269 | |
| 270 | /* one interface */ |
| 271 | 0x09, /* __u8 if_bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 272 | USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | 0x00, /* __u8 if_bInterfaceNumber; */ |
| 274 | 0x00, /* __u8 if_bAlternateSetting; */ |
| 275 | 0x01, /* __u8 if_bNumEndpoints; */ |
| 276 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ |
| 277 | 0x00, /* __u8 if_bInterfaceSubClass; */ |
| 278 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ |
| 279 | 0x00, /* __u8 if_iInterface; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | /* one endpoint (status change endpoint) */ |
| 282 | 0x07, /* __u8 ep_bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 283 | USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 285 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
| 286 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ |
| 288 | }; |
| 289 | |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 290 | static const u8 hs_rh_config_descriptor[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | /* one configuration */ |
| 293 | 0x09, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 294 | USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | 0x19, 0x00, /* __le16 wTotalLength; */ |
| 296 | 0x01, /* __u8 bNumInterfaces; (1) */ |
| 297 | 0x01, /* __u8 bConfigurationValue; */ |
| 298 | 0x00, /* __u8 iConfiguration; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 299 | 0xc0, /* __u8 bmAttributes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | Bit 7: must be set, |
| 301 | 6: Self-powered, |
| 302 | 5: Remote wakeup, |
| 303 | 4..0: resvd */ |
| 304 | 0x00, /* __u8 MaxPower; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | /* USB 1.1: |
| 307 | * USB 2.0, single TT organization (mandatory): |
| 308 | * one interface, protocol 0 |
| 309 | * |
| 310 | * USB 2.0, multiple TT organization (optional): |
| 311 | * two interfaces, protocols 1 (like single TT) |
| 312 | * and 2 (multiple TT mode) ... config is |
| 313 | * sometimes settable |
| 314 | * NOT IMPLEMENTED |
| 315 | */ |
| 316 | |
| 317 | /* one interface */ |
| 318 | 0x09, /* __u8 if_bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 319 | USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | 0x00, /* __u8 if_bInterfaceNumber; */ |
| 321 | 0x00, /* __u8 if_bAlternateSetting; */ |
| 322 | 0x01, /* __u8 if_bNumEndpoints; */ |
| 323 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ |
| 324 | 0x00, /* __u8 if_bInterfaceSubClass; */ |
| 325 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ |
| 326 | 0x00, /* __u8 if_iInterface; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | /* one endpoint (status change endpoint) */ |
| 329 | 0x07, /* __u8 ep_bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 330 | USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 332 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
inaky@linux.intel.com | 88fafff | 2006-10-11 20:05:59 -0700 | [diff] [blame] | 333 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
| 334 | * see hub.c:hub_configure() for details. */ |
| 335 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
| 337 | }; |
| 338 | |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 339 | static const u8 ss_rh_config_descriptor[] = { |
| 340 | /* one configuration */ |
| 341 | 0x09, /* __u8 bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 342 | USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ |
Sarah Sharp | 22c6a35 | 2010-09-13 12:01:02 -0700 | [diff] [blame] | 343 | 0x1f, 0x00, /* __le16 wTotalLength; */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 344 | 0x01, /* __u8 bNumInterfaces; (1) */ |
| 345 | 0x01, /* __u8 bConfigurationValue; */ |
| 346 | 0x00, /* __u8 iConfiguration; */ |
| 347 | 0xc0, /* __u8 bmAttributes; |
| 348 | Bit 7: must be set, |
| 349 | 6: Self-powered, |
| 350 | 5: Remote wakeup, |
| 351 | 4..0: resvd */ |
| 352 | 0x00, /* __u8 MaxPower; */ |
| 353 | |
| 354 | /* one interface */ |
| 355 | 0x09, /* __u8 if_bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 356 | USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 357 | 0x00, /* __u8 if_bInterfaceNumber; */ |
| 358 | 0x00, /* __u8 if_bAlternateSetting; */ |
| 359 | 0x01, /* __u8 if_bNumEndpoints; */ |
| 360 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ |
| 361 | 0x00, /* __u8 if_bInterfaceSubClass; */ |
| 362 | 0x00, /* __u8 if_bInterfaceProtocol; */ |
| 363 | 0x00, /* __u8 if_iInterface; */ |
| 364 | |
| 365 | /* one endpoint (status change endpoint) */ |
| 366 | 0x07, /* __u8 ep_bLength; */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 367 | USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 368 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
| 369 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
| 370 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
| 371 | * see hub.c:hub_configure() for details. */ |
| 372 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, |
Sarah Sharp | 22c6a35 | 2010-09-13 12:01:02 -0700 | [diff] [blame] | 373 | 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
| 374 | |
| 375 | /* one SuperSpeed endpoint companion descriptor */ |
| 376 | 0x06, /* __u8 ss_bLength */ |
Sergei Shtylyov | d491fe7 | 2015-10-04 21:11:35 +0300 | [diff] [blame] | 377 | USB_DT_SS_ENDPOINT_COMP, /* __u8 ss_bDescriptorType; SuperSpeed EP */ |
| 378 | /* Companion */ |
Sarah Sharp | 22c6a35 | 2010-09-13 12:01:02 -0700 | [diff] [blame] | 379 | 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ |
| 380 | 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ |
| 381 | 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 382 | }; |
| 383 | |
Carl-Daniel Hailfinger | c4fc234 | 2011-05-31 21:31:08 +0200 | [diff] [blame] | 384 | /* authorized_default behaviour: |
| 385 | * -1 is authorized for all devices except wireless (old behaviour) |
| 386 | * 0 is unauthorized for all devices |
| 387 | * 1 is authorized for all devices |
| 388 | */ |
| 389 | static int authorized_default = -1; |
| 390 | module_param(authorized_default, int, S_IRUGO|S_IWUSR); |
| 391 | MODULE_PARM_DESC(authorized_default, |
| 392 | "Default USB device authorization: 0 is not authorized, 1 is " |
| 393 | "authorized, -1 is authorized except for wireless USB (default, " |
| 394 | "old behaviour"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | /*-------------------------------------------------------------------------*/ |
| 396 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 397 | /** |
| 398 | * ascii2desc() - Helper routine for producing UTF-16LE string descriptors |
| 399 | * @s: Null-terminated ASCII (actually ISO-8859-1) string |
| 400 | * @buf: Buffer for USB string descriptor (header + UTF-16LE) |
| 401 | * @len: Length (in bytes; may be odd) of descriptor buffer. |
| 402 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 403 | * Return: The number of bytes filled in: 2 + 2*strlen(s) or @len, |
| 404 | * whichever is less. |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 405 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 406 | * Note: |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 407 | * USB String descriptors can contain at most 126 characters; input |
| 408 | * strings longer than that are truncated. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | */ |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 410 | static unsigned |
| 411 | ascii2desc(char const *s, u8 *buf, unsigned len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | { |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 413 | unsigned n, t = 2 + 2*strlen(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 415 | if (t > 254) |
| 416 | t = 254; /* Longest possible UTF string descriptor */ |
| 417 | if (len > t) |
| 418 | len = t; |
| 419 | |
| 420 | t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ |
| 421 | |
| 422 | n = len; |
| 423 | while (n--) { |
| 424 | *buf++ = t; |
| 425 | if (!n--) |
| 426 | break; |
| 427 | *buf++ = t >> 8; |
| 428 | t = (unsigned char)*s++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | } |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 430 | return len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 433 | /** |
| 434 | * rh_string() - provides string descriptors for root hub |
| 435 | * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | * @hcd: the host controller for this root hub |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 437 | * @data: buffer for output packet |
| 438 | * @len: length of the provided buffer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | * |
| 440 | * Produces either a manufacturer, product or serial number string for the |
| 441 | * virtual root hub device. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 442 | * |
| 443 | * Return: The number of bytes filled in: the length of the descriptor or |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 444 | * of the provided buffer, whichever is less. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | */ |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 446 | static unsigned |
| 447 | rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 448 | { |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 449 | char buf[100]; |
| 450 | char const *s; |
| 451 | static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 453 | /* language ids */ |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 454 | switch (id) { |
| 455 | case 0: |
| 456 | /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ |
| 457 | /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ |
| 458 | if (len > 4) |
| 459 | len = 4; |
| 460 | memcpy(data, langids, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | return len; |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 462 | case 1: |
| 463 | /* Serial number */ |
| 464 | s = hcd->self.bus_name; |
| 465 | break; |
| 466 | case 2: |
| 467 | /* Product name */ |
| 468 | s = hcd->product_desc; |
| 469 | break; |
| 470 | case 3: |
| 471 | /* Manufacturer */ |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 472 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
| 473 | init_utsname()->release, hcd->driver->description); |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 474 | s = buf; |
| 475 | break; |
| 476 | default: |
| 477 | /* Can't happen; caller guarantees it */ |
| 478 | return 0; |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 481 | return ascii2desc(s, data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | |
| 485 | /* Root hub control transfers execute synchronously */ |
| 486 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) |
| 487 | { |
| 488 | struct usb_ctrlrequest *cmd; |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 489 | u16 typeReq, wValue, wIndex, wLength; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | u8 *ubuf = urb->transfer_buffer; |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 491 | unsigned len = 0; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 492 | int status; |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 493 | u8 patch_wakeup = 0; |
| 494 | u8 patch_protocol = 0; |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 495 | u16 tbuf_size; |
| 496 | u8 *tbuf = NULL; |
| 497 | const u8 *bufp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 499 | might_sleep(); |
| 500 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 501 | spin_lock_irq(&hcd_root_hub_lock); |
| 502 | status = usb_hcd_link_urb_to_ep(hcd, urb); |
| 503 | spin_unlock_irq(&hcd_root_hub_lock); |
| 504 | if (status) |
| 505 | return status; |
Alan Stern | b0d9efb | 2007-08-21 15:39:21 -0400 | [diff] [blame] | 506 | urb->hcpriv = hcd; /* Indicate it's queued */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; |
| 509 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; |
| 510 | wValue = le16_to_cpu (cmd->wValue); |
| 511 | wIndex = le16_to_cpu (cmd->wIndex); |
| 512 | wLength = le16_to_cpu (cmd->wLength); |
| 513 | |
| 514 | if (wLength > urb->transfer_buffer_length) |
| 515 | goto error; |
| 516 | |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 517 | /* |
| 518 | * tbuf should be at least as big as the |
| 519 | * USB hub descriptor. |
| 520 | */ |
| 521 | tbuf_size = max_t(u16, sizeof(struct usb_hub_descriptor), wLength); |
| 522 | tbuf = kzalloc(tbuf_size, GFP_KERNEL); |
Alan Stern | 1633682 | 2017-03-24 13:38:28 -0400 | [diff] [blame] | 523 | if (!tbuf) { |
| 524 | status = -ENOMEM; |
| 525 | goto err_alloc; |
| 526 | } |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 527 | |
| 528 | bufp = tbuf; |
| 529 | |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | urb->actual_length = 0; |
| 532 | switch (typeReq) { |
| 533 | |
| 534 | /* DEVICE REQUESTS */ |
| 535 | |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 536 | /* The root hub's remote wakeup enable bit is implemented using |
| 537 | * driver model wakeup flags. If this system supports wakeup |
| 538 | * through USB, userspace may change the default "allow wakeup" |
| 539 | * policy through sysfs or these calls. |
| 540 | * |
| 541 | * Most root hubs support wakeup from downstream devices, for |
| 542 | * runtime power management (disabling USB clocks and reducing |
| 543 | * VBUS power usage). However, not all of them do so; silicon, |
| 544 | * board, and BIOS bugs here are not uncommon, so these can't |
| 545 | * be treated quite like external hubs. |
| 546 | * |
| 547 | * Likewise, not all root hubs will pass wakeup events upstream, |
| 548 | * to wake up the whole system. So don't assume root hub and |
| 549 | * controller capabilities are identical. |
| 550 | */ |
| 551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | case DeviceRequest | USB_REQ_GET_STATUS: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 553 | tbuf[0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 554 | << USB_DEVICE_REMOTE_WAKEUP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | | (1 << USB_DEVICE_SELF_POWERED); |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 556 | tbuf[1] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | len = 2; |
| 558 | break; |
| 559 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: |
| 560 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 561 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | else |
| 563 | goto error; |
| 564 | break; |
| 565 | case DeviceOutRequest | USB_REQ_SET_FEATURE: |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 566 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
| 567 | && wValue == USB_DEVICE_REMOTE_WAKEUP) |
| 568 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | else |
| 570 | goto error; |
| 571 | break; |
| 572 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 573 | tbuf[0] = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | len = 1; |
| 575 | /* FALLTHROUGH */ |
| 576 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: |
| 577 | break; |
| 578 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
| 579 | switch (wValue & 0xff00) { |
| 580 | case USB_DT_DEVICE << 8: |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 581 | switch (hcd->speed) { |
Mathias Nyman | 7117522 | 2015-10-01 18:40:37 +0300 | [diff] [blame] | 582 | case HCD_USB31: |
Mathias Nyman | 9508e3b | 2015-12-10 09:59:28 +0200 | [diff] [blame] | 583 | bufp = usb31_rh_dev_descriptor; |
| 584 | break; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 585 | case HCD_USB3: |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 586 | bufp = usb3_rh_dev_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 587 | break; |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 588 | case HCD_USB25: |
| 589 | bufp = usb25_rh_dev_descriptor; |
| 590 | break; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 591 | case HCD_USB2: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | bufp = usb2_rh_dev_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 593 | break; |
| 594 | case HCD_USB11: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | bufp = usb11_rh_dev_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 596 | break; |
| 597 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | goto error; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 599 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | len = 18; |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 601 | if (hcd->has_tt) |
| 602 | patch_protocol = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | break; |
| 604 | case USB_DT_CONFIG << 8: |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 605 | switch (hcd->speed) { |
Mathias Nyman | 7117522 | 2015-10-01 18:40:37 +0300 | [diff] [blame] | 606 | case HCD_USB31: |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 607 | case HCD_USB3: |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 608 | bufp = ss_rh_config_descriptor; |
| 609 | len = sizeof ss_rh_config_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 610 | break; |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 611 | case HCD_USB25: |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 612 | case HCD_USB2: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | bufp = hs_rh_config_descriptor; |
| 614 | len = sizeof hs_rh_config_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 615 | break; |
| 616 | case HCD_USB11: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | bufp = fs_rh_config_descriptor; |
| 618 | len = sizeof fs_rh_config_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 619 | break; |
| 620 | default: |
| 621 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 623 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | patch_wakeup = 1; |
| 625 | break; |
| 626 | case USB_DT_STRING << 8: |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 627 | if ((wValue & 0xff) < 4) |
| 628 | urb->actual_length = rh_string(wValue & 0xff, |
| 629 | hcd, ubuf, wLength); |
| 630 | else /* unsupported IDs --> "protocol stall" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | break; |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 633 | case USB_DT_BOS << 8: |
| 634 | goto nongeneric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | default: |
| 636 | goto error; |
| 637 | } |
| 638 | break; |
| 639 | case DeviceRequest | USB_REQ_GET_INTERFACE: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 640 | tbuf[0] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | len = 1; |
| 642 | /* FALLTHROUGH */ |
| 643 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: |
| 644 | break; |
| 645 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 646 | /* wValue == urb->dev->devaddr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | dev_dbg (hcd->self.controller, "root hub device address %d\n", |
| 648 | wValue); |
| 649 | break; |
| 650 | |
| 651 | /* INTERFACE REQUESTS (no defined feature/status flags) */ |
| 652 | |
| 653 | /* ENDPOINT REQUESTS */ |
| 654 | |
| 655 | case EndpointRequest | USB_REQ_GET_STATUS: |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 656 | /* ENDPOINT_HALT flag */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 657 | tbuf[0] = 0; |
| 658 | tbuf[1] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | len = 2; |
| 660 | /* FALLTHROUGH */ |
| 661 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: |
| 662 | case EndpointOutRequest | USB_REQ_SET_FEATURE: |
| 663 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); |
| 664 | break; |
| 665 | |
| 666 | /* CLASS REQUESTS (and errors) */ |
| 667 | |
| 668 | default: |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 669 | nongeneric: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | /* non-generic request */ |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 671 | switch (typeReq) { |
| 672 | case GetHubStatus: |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 673 | len = 4; |
| 674 | break; |
Mathias Nyman | 0cdd49a | 2015-12-10 09:59:29 +0200 | [diff] [blame] | 675 | case GetPortStatus: |
| 676 | if (wValue == HUB_PORT_STATUS) |
| 677 | len = 4; |
| 678 | else |
| 679 | /* other port status types return 8 bytes */ |
| 680 | len = 8; |
| 681 | break; |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 682 | case GetHubDescriptor: |
| 683 | len = sizeof (struct usb_hub_descriptor); |
| 684 | break; |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 685 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
| 686 | /* len is returned by hub_control */ |
| 687 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | } |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 689 | status = hcd->driver->hub_control (hcd, |
| 690 | typeReq, wValue, wIndex, |
| 691 | tbuf, wLength); |
Lan Tianyu | d2123fd | 2013-01-21 22:18:00 +0800 | [diff] [blame] | 692 | |
| 693 | if (typeReq == GetHubDescriptor) |
| 694 | usb_hub_adjust_deviceremovable(hcd->self.root_hub, |
| 695 | (struct usb_hub_descriptor *)tbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | break; |
| 697 | error: |
| 698 | /* "protocol stall" on error */ |
| 699 | status = -EPIPE; |
| 700 | } |
| 701 | |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 702 | if (status < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | len = 0; |
| 704 | if (status != -EPIPE) { |
| 705 | dev_dbg (hcd->self.controller, |
| 706 | "CTRL: TypeReq=0x%x val=0x%x " |
| 707 | "idx=0x%x len=%d ==> %d\n", |
| 708 | typeReq, wValue, wIndex, |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 709 | wLength, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 711 | } else if (status > 0) { |
| 712 | /* hub_control may return the length of data copied. */ |
| 713 | len = status; |
| 714 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | } |
| 716 | if (len) { |
| 717 | if (urb->transfer_buffer_length < len) |
| 718 | len = urb->transfer_buffer_length; |
| 719 | urb->actual_length = len; |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 720 | /* always USB_DIR_IN, toward host */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | memcpy (ubuf, bufp, len); |
| 722 | |
| 723 | /* report whether RH hardware supports remote wakeup */ |
| 724 | if (patch_wakeup && |
| 725 | len > offsetof (struct usb_config_descriptor, |
| 726 | bmAttributes)) |
| 727 | ((struct usb_config_descriptor *)ubuf)->bmAttributes |
| 728 | |= USB_CONFIG_ATT_WAKEUP; |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 729 | |
| 730 | /* report whether RH hardware has an integrated TT */ |
| 731 | if (patch_protocol && |
| 732 | len > offsetof(struct usb_device_descriptor, |
| 733 | bDeviceProtocol)) |
| 734 | ((struct usb_device_descriptor *) ubuf)-> |
Aman Deep | 7bf0118 | 2011-12-08 12:05:22 +0530 | [diff] [blame] | 735 | bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 738 | kfree(tbuf); |
Alan Stern | 1633682 | 2017-03-24 13:38:28 -0400 | [diff] [blame] | 739 | err_alloc: |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | /* any errors get returned through the urb completion */ |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 742 | spin_lock_irq(&hcd_root_hub_lock); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 743 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 744 | usb_hcd_giveback_urb(hcd, urb, status); |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 745 | spin_unlock_irq(&hcd_root_hub_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | /*-------------------------------------------------------------------------*/ |
| 750 | |
| 751 | /* |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 752 | * Root Hub interrupt transfers are polled using a timer if the |
| 753 | * driver requests it; otherwise the driver is responsible for |
| 754 | * calling usb_hcd_poll_rh_status() when an event occurs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | * |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 756 | * Completions are called in_interrupt(), but they may or may not |
| 757 | * be in_irq(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | */ |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 759 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | { |
| 761 | struct urb *urb; |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 762 | int length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | unsigned long flags; |
Joe Perches | ad361c9 | 2009-07-06 13:05:40 -0700 | [diff] [blame] | 764 | char buffer[6]; /* Any root hubs with > 31 ports? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 766 | if (unlikely(!hcd->rh_pollable)) |
Alan Stern | 1b42ae6 | 2007-03-13 11:10:52 -0400 | [diff] [blame] | 767 | return; |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 768 | if (!hcd->uses_new_polling && !hcd->status_urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 771 | length = hcd->driver->hub_status_data(hcd, buffer); |
| 772 | if (length > 0) { |
| 773 | |
| 774 | /* try to complete the status urb */ |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 775 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 776 | urb = hcd->status_urb; |
| 777 | if (urb) { |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 778 | clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 779 | hcd->status_urb = NULL; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 780 | urb->actual_length = length; |
| 781 | memcpy(urb->transfer_buffer, buffer, length); |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 782 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 783 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 784 | usb_hcd_giveback_urb(hcd, urb, 0); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 785 | } else { |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 786 | length = 0; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 787 | set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 788 | } |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 789 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | /* The USB 2.0 spec says 256 ms. This is close enough and won't |
Arjan van de Ven | 01cd081 | 2007-05-22 12:42:56 -0700 | [diff] [blame] | 793 | * exceed that limit if HZ is 100. The math is more clunky than |
| 794 | * maybe expected, this is to make sure that all timers for USB devices |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 795 | * fire at the same time to give the CPU a break in between */ |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 796 | if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 797 | (length == 0 && hcd->status_urb != NULL)) |
Arjan van de Ven | 01cd081 | 2007-05-22 12:42:56 -0700 | [diff] [blame] | 798 | mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 799 | } |
| 800 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
| 801 | |
| 802 | /* timer callback */ |
| 803 | static void rh_timer_func (unsigned long _hcd) |
| 804 | { |
| 805 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | /*-------------------------------------------------------------------------*/ |
| 809 | |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 810 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
| 811 | { |
| 812 | int retval; |
| 813 | unsigned long flags; |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 814 | unsigned len = 1 + (urb->dev->maxchild / 8); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 815 | |
| 816 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 817 | if (hcd->status_urb || urb->transfer_buffer_length < len) { |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 818 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); |
| 819 | retval = -EINVAL; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 820 | goto done; |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 821 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 822 | |
| 823 | retval = usb_hcd_link_urb_to_ep(hcd, urb); |
| 824 | if (retval) |
| 825 | goto done; |
| 826 | |
| 827 | hcd->status_urb = urb; |
| 828 | urb->hcpriv = hcd; /* indicate it's queued */ |
| 829 | if (!hcd->uses_new_polling) |
| 830 | mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
| 831 | |
| 832 | /* If a status change has already occurred, report it ASAP */ |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 833 | else if (HCD_POLL_PENDING(hcd)) |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 834 | mod_timer(&hcd->rh_timer, jiffies); |
| 835 | retval = 0; |
| 836 | done: |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 837 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
| 838 | return retval; |
| 839 | } |
| 840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
| 842 | { |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 843 | if (usb_endpoint_xfer_int(&urb->ep->desc)) |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 844 | return rh_queue_status (hcd, urb); |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 845 | if (usb_endpoint_xfer_control(&urb->ep->desc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | return rh_call_control (hcd, urb); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 847 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | /*-------------------------------------------------------------------------*/ |
| 851 | |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 852 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
| 853 | * since these URBs always execute synchronously. |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 854 | */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 855 | static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | { |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 857 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 858 | int rc; |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 859 | |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 860 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 861 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 862 | if (rc) |
| 863 | goto done; |
| 864 | |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 865 | if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 866 | ; /* Do nothing */ |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 867 | |
| 868 | } else { /* Status URB */ |
| 869 | if (!hcd->uses_new_polling) |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 870 | del_timer (&hcd->rh_timer); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 871 | if (urb == hcd->status_urb) { |
| 872 | hcd->status_urb = NULL; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 873 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 874 | usb_hcd_giveback_urb(hcd, urb, status); |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 875 | } |
| 876 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 877 | done: |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 878 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 879 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | } |
| 881 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 882 | |
| 883 | |
| 884 | /* |
| 885 | * Show & store the current value of authorized_default |
| 886 | */ |
Greg Kroah-Hartman | d03f254 | 2013-08-23 16:05:26 -0700 | [diff] [blame] | 887 | static ssize_t authorized_default_show(struct device *dev, |
| 888 | struct device_attribute *attr, char *buf) |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 889 | { |
| 890 | struct usb_device *rh_usb_dev = to_usb_device(dev); |
| 891 | struct usb_bus *usb_bus = rh_usb_dev->bus; |
Stefan Koch | ff8e2c5 | 2015-08-25 21:10:11 +0200 | [diff] [blame] | 892 | struct usb_hcd *hcd; |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 893 | |
Stefan Koch | ff8e2c5 | 2015-08-25 21:10:11 +0200 | [diff] [blame] | 894 | hcd = bus_to_hcd(usb_bus); |
| 895 | return snprintf(buf, PAGE_SIZE, "%u\n", !!HCD_DEV_AUTHORIZED(hcd)); |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 896 | } |
| 897 | |
Greg Kroah-Hartman | d03f254 | 2013-08-23 16:05:26 -0700 | [diff] [blame] | 898 | static ssize_t authorized_default_store(struct device *dev, |
| 899 | struct device_attribute *attr, |
| 900 | const char *buf, size_t size) |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 901 | { |
| 902 | ssize_t result; |
| 903 | unsigned val; |
| 904 | struct usb_device *rh_usb_dev = to_usb_device(dev); |
| 905 | struct usb_bus *usb_bus = rh_usb_dev->bus; |
Stefan Koch | ff8e2c5 | 2015-08-25 21:10:11 +0200 | [diff] [blame] | 906 | struct usb_hcd *hcd; |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 907 | |
Stefan Koch | ff8e2c5 | 2015-08-25 21:10:11 +0200 | [diff] [blame] | 908 | hcd = bus_to_hcd(usb_bus); |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 909 | result = sscanf(buf, "%u\n", &val); |
| 910 | if (result == 1) { |
Stefan Koch | ff8e2c5 | 2015-08-25 21:10:11 +0200 | [diff] [blame] | 911 | if (val) |
| 912 | set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); |
| 913 | else |
| 914 | clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); |
| 915 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 916 | result = size; |
Matthias Beyer | d1ddb0a | 2013-10-05 18:02:10 +0200 | [diff] [blame] | 917 | } else { |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 918 | result = -EINVAL; |
Matthias Beyer | d1ddb0a | 2013-10-05 18:02:10 +0200 | [diff] [blame] | 919 | } |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 920 | return result; |
| 921 | } |
Greg Kroah-Hartman | d03f254 | 2013-08-23 16:05:26 -0700 | [diff] [blame] | 922 | static DEVICE_ATTR_RW(authorized_default); |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 923 | |
Stefan Koch | 6b2bd3c | 2015-08-25 21:10:06 +0200 | [diff] [blame] | 924 | /* |
| 925 | * interface_authorized_default_show - show default authorization status |
| 926 | * for USB interfaces |
| 927 | * |
| 928 | * note: interface_authorized_default is the default value |
| 929 | * for initializing the authorized attribute of interfaces |
| 930 | */ |
| 931 | static ssize_t interface_authorized_default_show(struct device *dev, |
| 932 | struct device_attribute *attr, char *buf) |
| 933 | { |
| 934 | struct usb_device *usb_dev = to_usb_device(dev); |
| 935 | struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus); |
| 936 | |
| 937 | return sprintf(buf, "%u\n", !!HCD_INTF_AUTHORIZED(hcd)); |
| 938 | } |
| 939 | |
| 940 | /* |
| 941 | * interface_authorized_default_store - store default authorization status |
| 942 | * for USB interfaces |
| 943 | * |
| 944 | * note: interface_authorized_default is the default value |
| 945 | * for initializing the authorized attribute of interfaces |
| 946 | */ |
| 947 | static ssize_t interface_authorized_default_store(struct device *dev, |
| 948 | struct device_attribute *attr, const char *buf, size_t count) |
| 949 | { |
| 950 | struct usb_device *usb_dev = to_usb_device(dev); |
| 951 | struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus); |
| 952 | int rc = count; |
| 953 | bool val; |
| 954 | |
| 955 | if (strtobool(buf, &val) != 0) |
| 956 | return -EINVAL; |
| 957 | |
| 958 | if (val) |
| 959 | set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags); |
| 960 | else |
| 961 | clear_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags); |
| 962 | |
| 963 | return rc; |
| 964 | } |
| 965 | static DEVICE_ATTR_RW(interface_authorized_default); |
| 966 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 967 | /* Group all the USB bus attributes */ |
| 968 | static struct attribute *usb_bus_attrs[] = { |
| 969 | &dev_attr_authorized_default.attr, |
Stefan Koch | 6b2bd3c | 2015-08-25 21:10:06 +0200 | [diff] [blame] | 970 | &dev_attr_interface_authorized_default.attr, |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 971 | NULL, |
| 972 | }; |
| 973 | |
| 974 | static struct attribute_group usb_bus_attr_group = { |
| 975 | .name = NULL, /* we want them in the same directory */ |
| 976 | .attrs = usb_bus_attrs, |
| 977 | }; |
| 978 | |
| 979 | |
| 980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | /*-------------------------------------------------------------------------*/ |
| 982 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | /** |
| 984 | * usb_bus_init - shared initialization code |
| 985 | * @bus: the bus structure being initialized |
| 986 | * |
| 987 | * This code is used to initialize a usb_bus structure, memory for which is |
| 988 | * separately managed. |
| 989 | */ |
| 990 | static void usb_bus_init (struct usb_bus *bus) |
| 991 | { |
| 992 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); |
| 993 | |
| 994 | bus->devnum_next = 1; |
| 995 | |
| 996 | bus->root_hub = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | bus->busnum = -1; |
| 998 | bus->bandwidth_allocated = 0; |
| 999 | bus->bandwidth_int_reqs = 0; |
| 1000 | bus->bandwidth_isoc_reqs = 0; |
Chris Bainbridge | feb26ac | 2016-04-25 13:48:38 +0100 | [diff] [blame] | 1001 | mutex_init(&bus->devnum_next_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | /*-------------------------------------------------------------------------*/ |
| 1005 | |
| 1006 | /** |
| 1007 | * usb_register_bus - registers the USB host controller with the usb core |
| 1008 | * @bus: pointer to the bus to register |
| 1009 | * Context: !in_interrupt() |
| 1010 | * |
| 1011 | * Assigns a bus number, and links the controller into usbcore data |
| 1012 | * structures so that it can be seen by scanning the bus list. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1013 | * |
| 1014 | * Return: 0 if successful. A negative error code otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | */ |
| 1016 | static int usb_register_bus(struct usb_bus *bus) |
| 1017 | { |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1018 | int result = -E2BIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | int busnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1021 | mutex_lock(&usb_bus_idr_lock); |
Heiner Kallweit | 5363de7 | 2016-01-25 20:30:30 +0100 | [diff] [blame] | 1022 | busnum = idr_alloc(&usb_bus_idr, bus, 1, USB_MAXBUS, GFP_KERNEL); |
| 1023 | if (busnum < 0) { |
| 1024 | pr_err("%s: failed to get bus number\n", usbcore_name); |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1025 | goto error_find_busnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | } |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1027 | bus->busnum = busnum; |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1028 | mutex_unlock(&usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | |
Greg Kroah-Hartman | 3099e75 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1030 | usb_notify_add_bus(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1032 | dev_info (bus->controller, "new USB bus registered, assigned bus " |
| 1033 | "number %d\n", bus->busnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | return 0; |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1035 | |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1036 | error_find_busnum: |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1037 | mutex_unlock(&usb_bus_idr_lock); |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 1038 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | /** |
| 1042 | * usb_deregister_bus - deregisters the USB host controller |
| 1043 | * @bus: pointer to the bus to deregister |
| 1044 | * Context: !in_interrupt() |
| 1045 | * |
| 1046 | * Recycles the bus number, and unlinks the controller from usbcore data |
| 1047 | * structures so that it won't be seen by scanning the bus list. |
| 1048 | */ |
| 1049 | static void usb_deregister_bus (struct usb_bus *bus) |
| 1050 | { |
| 1051 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); |
| 1052 | |
| 1053 | /* |
| 1054 | * NOTE: make sure that all the devices are removed by the |
| 1055 | * controller code, as well as having it call this when cleaning |
| 1056 | * itself up |
| 1057 | */ |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1058 | mutex_lock(&usb_bus_idr_lock); |
Heiner Kallweit | 5363de7 | 2016-01-25 20:30:30 +0100 | [diff] [blame] | 1059 | idr_remove(&usb_bus_idr, bus->busnum); |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1060 | mutex_unlock(&usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
Greg Kroah-Hartman | 3099e75 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1062 | usb_notify_remove_bus(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | /** |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 1066 | * register_root_hub - called by usb_add_hcd() to register a root hub |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | * @hcd: host controller for this root hub |
| 1068 | * |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 1069 | * This function registers the root hub with the USB subsystem. It sets up |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 1070 | * the device properly in the device tree and then calls usb_new_device() |
| 1071 | * to register the usb device. It also assigns the root hub's USB address |
| 1072 | * (always 1). |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1073 | * |
| 1074 | * Return: 0 if successful. A negative error code otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | */ |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 1076 | static int register_root_hub(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | { |
| 1078 | struct device *parent_dev = hcd->self.controller; |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1079 | struct device *sysdev = hcd->self.sysdev; |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 1080 | struct usb_device *usb_dev = hcd->self.root_hub; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | const int devnum = 1; |
| 1082 | int retval; |
| 1083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | usb_dev->devnum = devnum; |
| 1085 | usb_dev->bus->devnum_next = devnum + 1; |
| 1086 | memset (&usb_dev->bus->devmap.devicemap, 0, |
| 1087 | sizeof usb_dev->bus->devmap.devicemap); |
| 1088 | set_bit (devnum, usb_dev->bus->devmap.devicemap); |
| 1089 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); |
| 1090 | |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1091 | mutex_lock(&usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 1093 | usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); |
| 1095 | if (retval != sizeof usb_dev->descriptor) { |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1096 | mutex_unlock(&usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1098 | dev_name(&usb_dev->dev), retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | return (retval < 0) ? retval : -EMSGSIZE; |
| 1100 | } |
Lu Baolu | 2d2a316 | 2015-06-16 09:08:26 +0800 | [diff] [blame] | 1101 | |
| 1102 | if (le16_to_cpu(usb_dev->descriptor.bcdUSB) >= 0x0201) { |
Sarah Sharp | 448b6eb | 2012-05-15 16:58:45 -0700 | [diff] [blame] | 1103 | retval = usb_get_bos_descriptor(usb_dev); |
Lu Baolu | 2d2a316 | 2015-06-16 09:08:26 +0800 | [diff] [blame] | 1104 | if (!retval) { |
| 1105 | usb_dev->lpm_capable = usb_device_supports_lpm(usb_dev); |
Mathias Nyman | 8a1b272 | 2015-12-10 09:59:25 +0200 | [diff] [blame] | 1106 | } else if (usb_dev->speed >= USB_SPEED_SUPER) { |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1107 | mutex_unlock(&usb_bus_idr_lock); |
Sarah Sharp | 448b6eb | 2012-05-15 16:58:45 -0700 | [diff] [blame] | 1108 | dev_dbg(parent_dev, "can't read %s bos descriptor %d\n", |
| 1109 | dev_name(&usb_dev->dev), retval); |
| 1110 | return retval; |
| 1111 | } |
| 1112 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | retval = usb_new_device (usb_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | if (retval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | dev_err (parent_dev, "can't register root hub for %s, %d\n", |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1117 | dev_name(&usb_dev->dev), retval); |
Alan Stern | 0a23140 | 2012-09-26 13:09:53 -0400 | [diff] [blame] | 1118 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | spin_lock_irq (&hcd_root_hub_lock); |
| 1120 | hcd->rh_registered = 1; |
| 1121 | spin_unlock_irq (&hcd_root_hub_lock); |
| 1122 | |
| 1123 | /* Did the HC die before the root hub was registered? */ |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 1124 | if (HCD_DEAD(hcd)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | usb_hc_died (hcd); /* This time clean up */ |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1126 | usb_dev->dev.of_node = sysdev->of_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 1128 | mutex_unlock(&usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
| 1130 | return retval; |
| 1131 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
Alan Stern | da0aa71 | 2013-01-25 17:09:42 -0500 | [diff] [blame] | 1133 | /* |
| 1134 | * usb_hcd_start_port_resume - a root-hub port is sending a resume signal |
| 1135 | * @bus: the bus which the root hub belongs to |
| 1136 | * @portnum: the port which is being resumed |
| 1137 | * |
| 1138 | * HCDs should call this function when they know that a resume signal is |
| 1139 | * being sent to a root-hub port. The root hub will be prevented from |
| 1140 | * going into autosuspend until usb_hcd_end_port_resume() is called. |
| 1141 | * |
| 1142 | * The bus's private lock must be held by the caller. |
| 1143 | */ |
| 1144 | void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum) |
| 1145 | { |
| 1146 | unsigned bit = 1 << portnum; |
| 1147 | |
| 1148 | if (!(bus->resuming_ports & bit)) { |
| 1149 | bus->resuming_ports |= bit; |
| 1150 | pm_runtime_get_noresume(&bus->root_hub->dev); |
| 1151 | } |
| 1152 | } |
| 1153 | EXPORT_SYMBOL_GPL(usb_hcd_start_port_resume); |
| 1154 | |
| 1155 | /* |
| 1156 | * usb_hcd_end_port_resume - a root-hub port has stopped sending a resume signal |
| 1157 | * @bus: the bus which the root hub belongs to |
| 1158 | * @portnum: the port which is being resumed |
| 1159 | * |
| 1160 | * HCDs should call this function when they know that a resume signal has |
| 1161 | * stopped being sent to a root-hub port. The root hub will be allowed to |
| 1162 | * autosuspend again. |
| 1163 | * |
| 1164 | * The bus's private lock must be held by the caller. |
| 1165 | */ |
| 1166 | void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum) |
| 1167 | { |
| 1168 | unsigned bit = 1 << portnum; |
| 1169 | |
| 1170 | if (bus->resuming_ports & bit) { |
| 1171 | bus->resuming_ports &= ~bit; |
| 1172 | pm_runtime_put_noidle(&bus->root_hub->dev); |
| 1173 | } |
| 1174 | } |
| 1175 | EXPORT_SYMBOL_GPL(usb_hcd_end_port_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | |
| 1177 | /*-------------------------------------------------------------------------*/ |
| 1178 | |
| 1179 | /** |
| 1180 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds |
| 1181 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} |
| 1182 | * @is_input: true iff the transaction sends data to the host |
| 1183 | * @isoc: true for isochronous transactions, false for interrupt ones |
| 1184 | * @bytecount: how many bytes in the transaction. |
| 1185 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1186 | * Return: Approximate bus time in nanoseconds for a periodic transaction. |
| 1187 | * |
| 1188 | * Note: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be |
| 1190 | * scheduled in software, this function is only used for such scheduling. |
| 1191 | */ |
| 1192 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) |
| 1193 | { |
| 1194 | unsigned long tmp; |
| 1195 | |
| 1196 | switch (speed) { |
| 1197 | case USB_SPEED_LOW: /* INTR only */ |
| 1198 | if (is_input) { |
| 1199 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1200 | return 64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | } else { |
| 1202 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1203 | return 64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | } |
| 1205 | case USB_SPEED_FULL: /* ISOC or INTR */ |
| 1206 | if (isoc) { |
| 1207 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1208 | return ((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } else { |
| 1210 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1211 | return 9107L + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | case USB_SPEED_HIGH: /* ISOC or INTR */ |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 1214 | /* FIXME adjust for input vs output */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | if (isoc) |
Dan Streetman | 498f78e | 2005-07-29 12:18:28 -0700 | [diff] [blame] | 1216 | tmp = HS_NSECS_ISO (bytecount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | else |
Dan Streetman | 498f78e | 2005-07-29 12:18:28 -0700 | [diff] [blame] | 1218 | tmp = HS_NSECS (bytecount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | return tmp; |
| 1220 | default: |
| 1221 | pr_debug ("%s: bogus device speed!\n", usbcore_name); |
| 1222 | return -1; |
| 1223 | } |
| 1224 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 1225 | EXPORT_SYMBOL_GPL(usb_calc_bus_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | |
| 1228 | /*-------------------------------------------------------------------------*/ |
| 1229 | |
| 1230 | /* |
| 1231 | * Generic HC operations. |
| 1232 | */ |
| 1233 | |
| 1234 | /*-------------------------------------------------------------------------*/ |
| 1235 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1236 | /** |
| 1237 | * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue |
| 1238 | * @hcd: host controller to which @urb was submitted |
| 1239 | * @urb: URB being submitted |
| 1240 | * |
| 1241 | * Host controller drivers should call this routine in their enqueue() |
| 1242 | * method. The HCD's private spinlock must be held and interrupts must |
| 1243 | * be disabled. The actions carried out here are required for URB |
| 1244 | * submission, as well as for endpoint shutdown and for usb_kill_urb. |
| 1245 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1246 | * Return: 0 for no error, otherwise a negative error code (in which case |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1247 | * the enqueue() method must fail). If no error occurs but enqueue() fails |
| 1248 | * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing |
| 1249 | * the private spinlock and returning. |
| 1250 | */ |
| 1251 | int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1252 | { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1253 | int rc = 0; |
| 1254 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1255 | spin_lock(&hcd_urb_list_lock); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1256 | |
| 1257 | /* Check that the URB isn't being killed */ |
Ming Lei | 49367d8 | 2008-12-12 21:38:45 +0800 | [diff] [blame] | 1258 | if (unlikely(atomic_read(&urb->reject))) { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1259 | rc = -EPERM; |
| 1260 | goto done; |
| 1261 | } |
| 1262 | |
| 1263 | if (unlikely(!urb->ep->enabled)) { |
| 1264 | rc = -ENOENT; |
| 1265 | goto done; |
| 1266 | } |
| 1267 | |
Alan Stern | 6840d25 | 2007-09-10 11:34:26 -0400 | [diff] [blame] | 1268 | if (unlikely(!urb->dev->can_submit)) { |
| 1269 | rc = -EHOSTUNREACH; |
| 1270 | goto done; |
| 1271 | } |
| 1272 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1273 | /* |
| 1274 | * Check the host controller's state and add the URB to the |
| 1275 | * endpoint's queue. |
| 1276 | */ |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 1277 | if (HCD_RH_RUNNING(hcd)) { |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1278 | urb->unlinked = 0; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1279 | list_add_tail(&urb->urb_list, &urb->ep->urb_list); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 1280 | } else { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1281 | rc = -ESHUTDOWN; |
| 1282 | goto done; |
| 1283 | } |
| 1284 | done: |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1285 | spin_unlock(&hcd_urb_list_lock); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1286 | return rc; |
| 1287 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1288 | EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1289 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1290 | /** |
| 1291 | * usb_hcd_check_unlink_urb - check whether an URB may be unlinked |
| 1292 | * @hcd: host controller to which @urb was submitted |
| 1293 | * @urb: URB being checked for unlinkability |
| 1294 | * @status: error code to store in @urb if the unlink succeeds |
| 1295 | * |
| 1296 | * Host controller drivers should call this routine in their dequeue() |
| 1297 | * method. The HCD's private spinlock must be held and interrupts must |
| 1298 | * be disabled. The actions carried out here are required for making |
| 1299 | * sure than an unlink is valid. |
| 1300 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1301 | * Return: 0 for no error, otherwise a negative error code (in which case |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1302 | * the dequeue() method must fail). The possible error codes are: |
| 1303 | * |
| 1304 | * -EIDRM: @urb was not submitted or has already completed. |
| 1305 | * The completion function may not have been called yet. |
| 1306 | * |
| 1307 | * -EBUSY: @urb has already been unlinked. |
| 1308 | */ |
| 1309 | int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1310 | int status) |
| 1311 | { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1312 | struct list_head *tmp; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1313 | |
| 1314 | /* insist the urb is still queued */ |
| 1315 | list_for_each(tmp, &urb->ep->urb_list) { |
| 1316 | if (tmp == &urb->urb_list) |
| 1317 | break; |
| 1318 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1319 | if (tmp != &urb->urb_list) |
| 1320 | return -EIDRM; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1321 | |
| 1322 | /* Any status except -EINPROGRESS means something already started to |
| 1323 | * unlink this URB from the hardware. So there's no more work to do. |
| 1324 | */ |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1325 | if (urb->unlinked) |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1326 | return -EBUSY; |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1327 | urb->unlinked = status; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1328 | return 0; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1329 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1330 | EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1331 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1332 | /** |
| 1333 | * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue |
| 1334 | * @hcd: host controller to which @urb was submitted |
| 1335 | * @urb: URB being unlinked |
| 1336 | * |
| 1337 | * Host controller drivers should call this routine before calling |
| 1338 | * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and |
| 1339 | * interrupts must be disabled. The actions carried out here are required |
| 1340 | * for URB completion. |
| 1341 | */ |
| 1342 | void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | /* clear all state linking urb to this dev (and hcd) */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1345 | spin_lock(&hcd_urb_list_lock); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1346 | list_del_init(&urb->urb_list); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1347 | spin_unlock(&hcd_urb_list_lock); |
Pete Zaitcev | 9f6a93f | 2007-06-08 13:37:49 -0700 | [diff] [blame] | 1348 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1349 | EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1351 | /* |
| 1352 | * Some usb host controllers can only perform dma using a small SRAM area. |
| 1353 | * The usb core itself is however optimized for host controllers that can dma |
| 1354 | * using regular system memory - like pci devices doing bus mastering. |
| 1355 | * |
Mickael Maison | a6cd244 | 2014-09-18 11:25:04 +0200 | [diff] [blame] | 1356 | * To support host controllers with limited dma capabilities we provide dma |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1357 | * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. |
| 1358 | * For this to work properly the host controller code must first use the |
| 1359 | * function dma_declare_coherent_memory() to point out which memory area |
| 1360 | * that should be used for dma allocations. |
| 1361 | * |
| 1362 | * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for |
| 1363 | * dma using dma_alloc_coherent() which in turn allocates from the memory |
| 1364 | * area pointed out with dma_declare_coherent_memory(). |
| 1365 | * |
| 1366 | * So, to summarize... |
| 1367 | * |
| 1368 | * - We need "local" memory, canonical example being |
| 1369 | * a small SRAM on a discrete controller being the |
| 1370 | * only memory that the controller can read ... |
| 1371 | * (a) "normal" kernel memory is no good, and |
| 1372 | * (b) there's not enough to share |
| 1373 | * |
| 1374 | * - The only *portable* hook for such stuff in the |
| 1375 | * DMA framework is dma_declare_coherent_memory() |
| 1376 | * |
| 1377 | * - So we use that, even though the primary requirement |
Rahul Bedarkar | 025d443 | 2014-01-04 11:24:41 +0530 | [diff] [blame] | 1378 | * is that the memory be "local" (hence addressable |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1379 | * by that device), not "coherent". |
| 1380 | * |
| 1381 | */ |
| 1382 | |
| 1383 | static int hcd_alloc_coherent(struct usb_bus *bus, |
| 1384 | gfp_t mem_flags, dma_addr_t *dma_handle, |
| 1385 | void **vaddr_handle, size_t size, |
| 1386 | enum dma_data_direction dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1388 | unsigned char *vaddr; |
| 1389 | |
Andrea Righi | 4307a28 | 2010-06-28 16:56:45 +0200 | [diff] [blame] | 1390 | if (*vaddr_handle == NULL) { |
| 1391 | WARN_ON_ONCE(1); |
| 1392 | return -EFAULT; |
| 1393 | } |
| 1394 | |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1395 | vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), |
| 1396 | mem_flags, dma_handle); |
| 1397 | if (!vaddr) |
| 1398 | return -ENOMEM; |
| 1399 | |
| 1400 | /* |
| 1401 | * Store the virtual address of the buffer at the end |
| 1402 | * of the allocated dma buffer. The size of the buffer |
| 1403 | * may be uneven so use unaligned functions instead |
| 1404 | * of just rounding up. It makes sense to optimize for |
| 1405 | * memory footprint over access speed since the amount |
| 1406 | * of memory available for dma may be limited. |
| 1407 | */ |
| 1408 | put_unaligned((unsigned long)*vaddr_handle, |
| 1409 | (unsigned long *)(vaddr + size)); |
| 1410 | |
| 1411 | if (dir == DMA_TO_DEVICE) |
| 1412 | memcpy(vaddr, *vaddr_handle, size); |
| 1413 | |
| 1414 | *vaddr_handle = vaddr; |
| 1415 | return 0; |
| 1416 | } |
| 1417 | |
| 1418 | static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, |
| 1419 | void **vaddr_handle, size_t size, |
| 1420 | enum dma_data_direction dir) |
| 1421 | { |
| 1422 | unsigned char *vaddr = *vaddr_handle; |
| 1423 | |
| 1424 | vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); |
| 1425 | |
| 1426 | if (dir == DMA_FROM_DEVICE) |
| 1427 | memcpy(vaddr, *vaddr_handle, size); |
| 1428 | |
| 1429 | hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); |
| 1430 | |
| 1431 | *vaddr_handle = vaddr; |
| 1432 | *dma_handle = 0; |
| 1433 | } |
| 1434 | |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1435 | void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1436 | { |
Geert Uytterhoeven | 58f2266 | 2016-02-16 16:10:57 +0100 | [diff] [blame] | 1437 | if (IS_ENABLED(CONFIG_HAS_DMA) && |
| 1438 | (urb->transfer_flags & URB_SETUP_MAP_SINGLE)) |
Sekhar Nori | bde654a | 2017-04-03 13:56:52 +0530 | [diff] [blame] | 1439 | dma_unmap_single(hcd->self.sysdev, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1440 | urb->setup_dma, |
| 1441 | sizeof(struct usb_ctrlrequest), |
| 1442 | DMA_TO_DEVICE); |
| 1443 | else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) |
| 1444 | hcd_free_coherent(urb->dev->bus, |
| 1445 | &urb->setup_dma, |
| 1446 | (void **) &urb->setup_packet, |
| 1447 | sizeof(struct usb_ctrlrequest), |
| 1448 | DMA_TO_DEVICE); |
| 1449 | |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1450 | /* Make it safe to call this routine more than once */ |
| 1451 | urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); |
| 1452 | } |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1453 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1454 | |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1455 | static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
| 1456 | { |
| 1457 | if (hcd->driver->unmap_urb_for_dma) |
| 1458 | hcd->driver->unmap_urb_for_dma(hcd, urb); |
| 1459 | else |
| 1460 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
| 1461 | } |
| 1462 | |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1463 | void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1464 | { |
| 1465 | enum dma_data_direction dir; |
| 1466 | |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1467 | usb_hcd_unmap_urb_setup_for_dma(hcd, urb); |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1468 | |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1469 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
Geert Uytterhoeven | 58f2266 | 2016-02-16 16:10:57 +0100 | [diff] [blame] | 1470 | if (IS_ENABLED(CONFIG_HAS_DMA) && |
| 1471 | (urb->transfer_flags & URB_DMA_MAP_SG)) |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1472 | dma_unmap_sg(hcd->self.sysdev, |
Matthew Wilcox | 910f8d0 | 2010-05-01 12:20:01 -0600 | [diff] [blame] | 1473 | urb->sg, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1474 | urb->num_sgs, |
| 1475 | dir); |
Geert Uytterhoeven | 58f2266 | 2016-02-16 16:10:57 +0100 | [diff] [blame] | 1476 | else if (IS_ENABLED(CONFIG_HAS_DMA) && |
| 1477 | (urb->transfer_flags & URB_DMA_MAP_PAGE)) |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1478 | dma_unmap_page(hcd->self.sysdev, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1479 | urb->transfer_dma, |
| 1480 | urb->transfer_buffer_length, |
| 1481 | dir); |
Geert Uytterhoeven | 58f2266 | 2016-02-16 16:10:57 +0100 | [diff] [blame] | 1482 | else if (IS_ENABLED(CONFIG_HAS_DMA) && |
| 1483 | (urb->transfer_flags & URB_DMA_MAP_SINGLE)) |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1484 | dma_unmap_single(hcd->self.sysdev, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1485 | urb->transfer_dma, |
| 1486 | urb->transfer_buffer_length, |
| 1487 | dir); |
| 1488 | else if (urb->transfer_flags & URB_MAP_LOCAL) |
| 1489 | hcd_free_coherent(urb->dev->bus, |
| 1490 | &urb->transfer_dma, |
| 1491 | &urb->transfer_buffer, |
| 1492 | urb->transfer_buffer_length, |
| 1493 | dir); |
| 1494 | |
| 1495 | /* Make it safe to call this routine more than once */ |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1496 | urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1497 | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); |
| 1498 | } |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1499 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1500 | |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1501 | static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
| 1502 | gfp_t mem_flags) |
| 1503 | { |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1504 | if (hcd->driver->map_urb_for_dma) |
| 1505 | return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); |
| 1506 | else |
| 1507 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); |
| 1508 | } |
| 1509 | |
| 1510 | int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
| 1511 | gfp_t mem_flags) |
| 1512 | { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1513 | enum dma_data_direction dir; |
| 1514 | int ret = 0; |
| 1515 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1516 | /* Map the URB's buffers for DMA access. |
| 1517 | * Lower level HCD code should use *_dma exclusively, |
Sarah Sharp | e04748e | 2009-04-27 19:59:01 -0700 | [diff] [blame] | 1518 | * unless it uses pio or talks to another transport, |
| 1519 | * or uses the provided scatter gather list for bulk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | */ |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1521 | |
Alan Stern | 85bcb5e | 2010-04-30 16:35:37 -0400 | [diff] [blame] | 1522 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
Anand Gadiyar | 07a8cdd | 2010-11-18 18:54:17 +0530 | [diff] [blame] | 1523 | if (hcd->self.uses_pio_for_control) |
| 1524 | return ret; |
Geert Uytterhoeven | 58f2266 | 2016-02-16 16:10:57 +0100 | [diff] [blame] | 1525 | if (IS_ENABLED(CONFIG_HAS_DMA) && hcd->self.uses_dma) { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1526 | urb->setup_dma = dma_map_single( |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1527 | hcd->self.sysdev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | urb->setup_packet, |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1529 | sizeof(struct usb_ctrlrequest), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | DMA_TO_DEVICE); |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1531 | if (dma_mapping_error(hcd->self.sysdev, |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1532 | urb->setup_dma)) |
| 1533 | return -EAGAIN; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1534 | urb->transfer_flags |= URB_SETUP_MAP_SINGLE; |
Ming Lei | f537da6 | 2010-05-12 23:38:12 +0800 | [diff] [blame] | 1535 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1536 | ret = hcd_alloc_coherent( |
| 1537 | urb->dev->bus, mem_flags, |
| 1538 | &urb->setup_dma, |
| 1539 | (void **)&urb->setup_packet, |
| 1540 | sizeof(struct usb_ctrlrequest), |
| 1541 | DMA_TO_DEVICE); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1542 | if (ret) |
| 1543 | return ret; |
| 1544 | urb->transfer_flags |= URB_SETUP_MAP_LOCAL; |
Ming Lei | f537da6 | 2010-05-12 23:38:12 +0800 | [diff] [blame] | 1545 | } |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1546 | } |
| 1547 | |
| 1548 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1549 | if (urb->transfer_buffer_length != 0 |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1550 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { |
Geert Uytterhoeven | 58f2266 | 2016-02-16 16:10:57 +0100 | [diff] [blame] | 1551 | if (IS_ENABLED(CONFIG_HAS_DMA) && hcd->self.uses_dma) { |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1552 | if (urb->num_sgs) { |
Hans de Goede | fe2072c | 2012-07-09 15:57:00 +0200 | [diff] [blame] | 1553 | int n; |
| 1554 | |
| 1555 | /* We don't support sg for isoc transfers ! */ |
| 1556 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
| 1557 | WARN_ON(1); |
| 1558 | return -EINVAL; |
| 1559 | } |
| 1560 | |
| 1561 | n = dma_map_sg( |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1562 | hcd->self.sysdev, |
Matthew Wilcox | 910f8d0 | 2010-05-01 12:20:01 -0600 | [diff] [blame] | 1563 | urb->sg, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1564 | urb->num_sgs, |
| 1565 | dir); |
| 1566 | if (n <= 0) |
| 1567 | ret = -EAGAIN; |
| 1568 | else |
| 1569 | urb->transfer_flags |= URB_DMA_MAP_SG; |
Clemens Ladisch | bc677d5 | 2011-12-03 23:41:31 +0100 | [diff] [blame] | 1570 | urb->num_mapped_sgs = n; |
| 1571 | if (n != urb->num_sgs) |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1572 | urb->transfer_flags |= |
| 1573 | URB_DMA_SG_COMBINED; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1574 | } else if (urb->sg) { |
Matthew Wilcox | 910f8d0 | 2010-05-01 12:20:01 -0600 | [diff] [blame] | 1575 | struct scatterlist *sg = urb->sg; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1576 | urb->transfer_dma = dma_map_page( |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1577 | hcd->self.sysdev, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1578 | sg_page(sg), |
| 1579 | sg->offset, |
| 1580 | urb->transfer_buffer_length, |
| 1581 | dir); |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1582 | if (dma_mapping_error(hcd->self.sysdev, |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1583 | urb->transfer_dma)) |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1584 | ret = -EAGAIN; |
| 1585 | else |
| 1586 | urb->transfer_flags |= URB_DMA_MAP_PAGE; |
Dan Williams | 29d2fef | 2014-05-08 19:25:56 +0300 | [diff] [blame] | 1587 | } else if (is_vmalloc_addr(urb->transfer_buffer)) { |
| 1588 | WARN_ONCE(1, "transfer buffer not dma capable\n"); |
| 1589 | ret = -EAGAIN; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1590 | } else { |
| 1591 | urb->transfer_dma = dma_map_single( |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1592 | hcd->self.sysdev, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1593 | urb->transfer_buffer, |
| 1594 | urb->transfer_buffer_length, |
| 1595 | dir); |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 1596 | if (dma_mapping_error(hcd->self.sysdev, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1597 | urb->transfer_dma)) |
| 1598 | ret = -EAGAIN; |
| 1599 | else |
| 1600 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; |
| 1601 | } |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1602 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1603 | ret = hcd_alloc_coherent( |
| 1604 | urb->dev->bus, mem_flags, |
| 1605 | &urb->transfer_dma, |
| 1606 | &urb->transfer_buffer, |
| 1607 | urb->transfer_buffer_length, |
| 1608 | dir); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1609 | if (ret == 0) |
| 1610 | urb->transfer_flags |= URB_MAP_LOCAL; |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1611 | } |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1612 | if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | |
| 1613 | URB_SETUP_MAP_LOCAL))) |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1614 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | } |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1616 | return ret; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1617 | } |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1618 | EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1620 | /*-------------------------------------------------------------------------*/ |
| 1621 | |
| 1622 | /* may be called in any context with a valid urb->dev usecount |
| 1623 | * caller surrenders "ownership" of urb |
| 1624 | * expects usb_submit_urb() to have sanity checked and conditioned all |
| 1625 | * inputs in the urb |
| 1626 | */ |
| 1627 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) |
| 1628 | { |
| 1629 | int status; |
| 1630 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); |
| 1631 | |
| 1632 | /* increment urb's reference count as part of giving it to the HCD |
| 1633 | * (which will control it). HCD guarantees that it either returns |
| 1634 | * an error or calls giveback(), but not both. |
| 1635 | */ |
| 1636 | usb_get_urb(urb); |
| 1637 | atomic_inc(&urb->use_count); |
Sarah Sharp | 4d59d8a | 2007-10-03 14:56:03 -0700 | [diff] [blame] | 1638 | atomic_inc(&urb->dev->urbnum); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1639 | usbmon_urb_submit(&hcd->self, urb); |
| 1640 | |
| 1641 | /* NOTE requirements on root-hub callers (usbfs and the hub |
| 1642 | * driver, for now): URBs' urb->transfer_buffer must be |
| 1643 | * valid and usb_buffer_{sync,unmap}() not be needed, since |
| 1644 | * they could clobber root hub response data. Also, control |
| 1645 | * URBs must be submitted in process context with interrupts |
| 1646 | * enabled. |
| 1647 | */ |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1648 | |
| 1649 | if (is_root_hub(urb->dev)) { |
| 1650 | status = rh_urb_enqueue(hcd, urb); |
| 1651 | } else { |
| 1652 | status = map_urb_for_dma(hcd, urb, mem_flags); |
| 1653 | if (likely(status == 0)) { |
| 1654 | status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); |
| 1655 | if (unlikely(status)) |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1656 | unmap_urb_for_dma(hcd, urb); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1657 | } |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1658 | } |
| 1659 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1660 | if (unlikely(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | usbmon_urb_submit_error(&hcd->self, urb, status); |
Alan Stern | b0d9efb | 2007-08-21 15:39:21 -0400 | [diff] [blame] | 1662 | urb->hcpriv = NULL; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1663 | INIT_LIST_HEAD(&urb->urb_list); |
| 1664 | atomic_dec(&urb->use_count); |
Sarah Sharp | 4d59d8a | 2007-10-03 14:56:03 -0700 | [diff] [blame] | 1665 | atomic_dec(&urb->dev->urbnum); |
Ming Lei | 49367d8 | 2008-12-12 21:38:45 +0800 | [diff] [blame] | 1666 | if (atomic_read(&urb->reject)) |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1667 | wake_up(&usb_kill_urb_queue); |
| 1668 | usb_put_urb(urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | } |
| 1670 | return status; |
| 1671 | } |
| 1672 | |
| 1673 | /*-------------------------------------------------------------------------*/ |
| 1674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | /* this makes the hcd giveback() the urb more quickly, by kicking it |
| 1676 | * off hardware queues (which may take a while) and returning it as |
| 1677 | * soon as practical. we've already set up the urb's return status, |
| 1678 | * but we can't know if the callback completed already. |
| 1679 | */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1680 | static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | { |
| 1682 | int value; |
| 1683 | |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1684 | if (is_root_hub(urb->dev)) |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1685 | value = usb_rh_urb_dequeue(hcd, urb, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | else { |
| 1687 | |
| 1688 | /* The only reason an HCD might fail this call is if |
| 1689 | * it has not yet fully queued the urb to begin with. |
| 1690 | * Such failures should be harmless. */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1691 | value = hcd->driver->urb_dequeue(hcd, urb, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | return value; |
| 1694 | } |
| 1695 | |
| 1696 | /* |
| 1697 | * called in any context |
| 1698 | * |
| 1699 | * caller guarantees urb won't be recycled till both unlink() |
| 1700 | * and the urb's completion function return |
| 1701 | */ |
Alan Stern | a6d2bb9 | 2006-08-30 11:27:36 -0400 | [diff] [blame] | 1702 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1704 | struct usb_hcd *hcd; |
Alan Stern | c991979 | 2015-01-30 12:58:26 -0500 | [diff] [blame] | 1705 | struct usb_device *udev = urb->dev; |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 1706 | int retval = -EIDRM; |
| 1707 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 1709 | /* Prevent the device and bus from going away while |
| 1710 | * the unlink is carried out. If they are already gone |
| 1711 | * then urb->use_count must be 0, since disconnected |
| 1712 | * devices can't have any active URBs. |
| 1713 | */ |
| 1714 | spin_lock_irqsave(&hcd_urb_unlink_lock, flags); |
| 1715 | if (atomic_read(&urb->use_count) > 0) { |
| 1716 | retval = 0; |
Alan Stern | c991979 | 2015-01-30 12:58:26 -0500 | [diff] [blame] | 1717 | usb_get_dev(udev); |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 1718 | } |
| 1719 | spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); |
| 1720 | if (retval == 0) { |
| 1721 | hcd = bus_to_hcd(urb->dev->bus); |
| 1722 | retval = unlink1(hcd, urb, status); |
Alan Stern | c991979 | 2015-01-30 12:58:26 -0500 | [diff] [blame] | 1723 | if (retval == 0) |
| 1724 | retval = -EINPROGRESS; |
| 1725 | else if (retval != -EIDRM && retval != -EBUSY) |
Vamsi Krishna Samavedam | 2f96478 | 2017-05-16 14:38:08 +0200 | [diff] [blame] | 1726 | dev_dbg(&udev->dev, "hcd_unlink_urb %pK fail %d\n", |
Alan Stern | c991979 | 2015-01-30 12:58:26 -0500 | [diff] [blame] | 1727 | urb, retval); |
| 1728 | usb_put_dev(udev); |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 1729 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | return retval; |
| 1731 | } |
| 1732 | |
| 1733 | /*-------------------------------------------------------------------------*/ |
| 1734 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1735 | static void __usb_hcd_giveback_urb(struct urb *urb) |
| 1736 | { |
| 1737 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); |
Hans de Goede | 6ec4147 | 2013-10-09 17:01:41 +0200 | [diff] [blame] | 1738 | struct usb_anchor *anchor = urb->anchor; |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1739 | int status = urb->unlinked; |
| 1740 | unsigned long flags; |
| 1741 | |
| 1742 | urb->hcpriv = NULL; |
| 1743 | if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && |
| 1744 | urb->actual_length < urb->transfer_buffer_length && |
| 1745 | !status)) |
| 1746 | status = -EREMOTEIO; |
| 1747 | |
| 1748 | unmap_urb_for_dma(hcd, urb); |
| 1749 | usbmon_urb_complete(&hcd->self, urb, status); |
Hans de Goede | 6ec4147 | 2013-10-09 17:01:41 +0200 | [diff] [blame] | 1750 | usb_anchor_suspend_wakeups(anchor); |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1751 | usb_unanchor_urb(urb); |
Michal Sojka | 0cfbd32 | 2014-09-24 22:43:21 +0200 | [diff] [blame] | 1752 | if (likely(status == 0)) |
| 1753 | usb_led_activity(USB_LED_EVENT_HOST); |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1754 | |
| 1755 | /* pass ownership to the completion handler */ |
| 1756 | urb->status = status; |
| 1757 | |
| 1758 | /* |
| 1759 | * We disable local IRQs here avoid possible deadlock because |
| 1760 | * drivers may call spin_lock() to hold lock which might be |
| 1761 | * acquired in one hard interrupt handler. |
| 1762 | * |
| 1763 | * The local_irq_save()/local_irq_restore() around complete() |
| 1764 | * will be removed if current USB drivers have been cleaned up |
| 1765 | * and no one may trigger the above deadlock situation when |
| 1766 | * running complete() in tasklet. |
| 1767 | */ |
| 1768 | local_irq_save(flags); |
| 1769 | urb->complete(urb); |
| 1770 | local_irq_restore(flags); |
| 1771 | |
Hans de Goede | 6ec4147 | 2013-10-09 17:01:41 +0200 | [diff] [blame] | 1772 | usb_anchor_resume_wakeups(anchor); |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1773 | atomic_dec(&urb->use_count); |
| 1774 | if (unlikely(atomic_read(&urb->reject))) |
| 1775 | wake_up(&usb_kill_urb_queue); |
| 1776 | usb_put_urb(urb); |
| 1777 | } |
| 1778 | |
| 1779 | static void usb_giveback_urb_bh(unsigned long param) |
| 1780 | { |
| 1781 | struct giveback_urb_bh *bh = (struct giveback_urb_bh *)param; |
| 1782 | struct list_head local_list; |
| 1783 | |
| 1784 | spin_lock_irq(&bh->lock); |
| 1785 | bh->running = true; |
| 1786 | restart: |
| 1787 | list_replace_init(&bh->head, &local_list); |
| 1788 | spin_unlock_irq(&bh->lock); |
| 1789 | |
| 1790 | while (!list_empty(&local_list)) { |
| 1791 | struct urb *urb; |
| 1792 | |
| 1793 | urb = list_entry(local_list.next, struct urb, urb_list); |
| 1794 | list_del_init(&urb->urb_list); |
Alan Stern | c7ccde6 | 2013-09-03 13:58:43 -0400 | [diff] [blame] | 1795 | bh->completing_ep = urb->ep; |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1796 | __usb_hcd_giveback_urb(urb); |
Alan Stern | c7ccde6 | 2013-09-03 13:58:43 -0400 | [diff] [blame] | 1797 | bh->completing_ep = NULL; |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1798 | } |
| 1799 | |
| 1800 | /* check if there are new URBs to giveback */ |
| 1801 | spin_lock_irq(&bh->lock); |
| 1802 | if (!list_empty(&bh->head)) |
| 1803 | goto restart; |
| 1804 | bh->running = false; |
| 1805 | spin_unlock_irq(&bh->lock); |
| 1806 | } |
| 1807 | |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1808 | /** |
| 1809 | * usb_hcd_giveback_urb - return URB from HCD to device driver |
| 1810 | * @hcd: host controller returning the URB |
| 1811 | * @urb: urb being returned to the USB device driver. |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1812 | * @status: completion status code for the URB. |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1813 | * Context: in_interrupt() |
| 1814 | * |
| 1815 | * This hands the URB from HCD to its USB device driver, using its |
| 1816 | * completion function. The HCD has freed all per-urb resources |
| 1817 | * (and is done using urb->hcpriv). It also released all HCD locks; |
| 1818 | * the device driver won't cause problems if it frees, modifies, |
| 1819 | * or resubmits this URB. |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1820 | * |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1821 | * If @urb was unlinked, the value of @status will be overridden by |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1822 | * @urb->unlinked. Erroneous short transfers are detected in case |
| 1823 | * the HCD hasn't checked for them. |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1824 | */ |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1825 | void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1826 | { |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1827 | struct giveback_urb_bh *bh; |
| 1828 | bool running, high_prio_bh; |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1829 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1830 | /* pass status to tasklet via unlinked */ |
| 1831 | if (likely(!urb->unlinked)) |
| 1832 | urb->unlinked = status; |
Alan Stern | 1f5a3d0 | 2007-08-22 13:06:53 -0400 | [diff] [blame] | 1833 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1834 | if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) { |
| 1835 | __usb_hcd_giveback_urb(urb); |
| 1836 | return; |
| 1837 | } |
| 1838 | |
| 1839 | if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) { |
| 1840 | bh = &hcd->high_prio_bh; |
| 1841 | high_prio_bh = true; |
| 1842 | } else { |
| 1843 | bh = &hcd->low_prio_bh; |
| 1844 | high_prio_bh = false; |
| 1845 | } |
| 1846 | |
| 1847 | spin_lock(&bh->lock); |
| 1848 | list_add_tail(&urb->urb_list, &bh->head); |
| 1849 | running = bh->running; |
| 1850 | spin_unlock(&bh->lock); |
| 1851 | |
| 1852 | if (running) |
| 1853 | ; |
| 1854 | else if (high_prio_bh) |
| 1855 | tasklet_hi_schedule(&bh->bh); |
| 1856 | else |
| 1857 | tasklet_schedule(&bh->bh); |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1858 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 1859 | EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1860 | |
| 1861 | /*-------------------------------------------------------------------------*/ |
| 1862 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1863 | /* Cancel all URBs pending on this endpoint and wait for the endpoint's |
| 1864 | * queue to drain completely. The caller must first insure that no more |
| 1865 | * URBs can be submitted for this endpoint. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | */ |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1867 | void usb_hcd_flush_endpoint(struct usb_device *udev, |
Alan Stern | a6d2bb9 | 2006-08-30 11:27:36 -0400 | [diff] [blame] | 1868 | struct usb_host_endpoint *ep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | { |
| 1870 | struct usb_hcd *hcd; |
| 1871 | struct urb *urb; |
| 1872 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1873 | if (!ep) |
| 1874 | return; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1875 | might_sleep(); |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 1876 | hcd = bus_to_hcd(udev->bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1878 | /* No more submits can occur */ |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1879 | spin_lock_irq(&hcd_urb_list_lock); |
Alan Stern | ddc1fd6 | 2007-11-21 15:13:10 -0800 | [diff] [blame] | 1880 | rescan: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | list_for_each_entry (urb, &ep->urb_list, urb_list) { |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 1882 | int is_in; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1884 | if (urb->unlinked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | continue; |
| 1886 | usb_get_urb (urb); |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 1887 | is_in = usb_urb_dir_in(urb); |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1888 | spin_unlock(&hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1890 | /* kick hcd */ |
| 1891 | unlink1(hcd, urb, -ESHUTDOWN); |
| 1892 | dev_dbg (hcd->self.controller, |
Vamsi Krishna Samavedam | 2f96478 | 2017-05-16 14:38:08 +0200 | [diff] [blame] | 1893 | "shutdown urb %pK ep%d%s%s\n", |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1894 | urb, usb_endpoint_num(&ep->desc), |
| 1895 | is_in ? "in" : "out", |
| 1896 | ({ char *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1898 | switch (usb_endpoint_type(&ep->desc)) { |
| 1899 | case USB_ENDPOINT_XFER_CONTROL: |
| 1900 | s = ""; break; |
| 1901 | case USB_ENDPOINT_XFER_BULK: |
| 1902 | s = "-bulk"; break; |
| 1903 | case USB_ENDPOINT_XFER_INT: |
| 1904 | s = "-intr"; break; |
| 1905 | default: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 1906 | s = "-iso"; break; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1907 | }; |
| 1908 | s; |
| 1909 | })); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | usb_put_urb (urb); |
| 1911 | |
| 1912 | /* list contents may have changed */ |
Alan Stern | ddc1fd6 | 2007-11-21 15:13:10 -0800 | [diff] [blame] | 1913 | spin_lock(&hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | goto rescan; |
| 1915 | } |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1916 | spin_unlock_irq(&hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1918 | /* Wait until the endpoint queue is completely empty */ |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 1919 | while (!list_empty (&ep->urb_list)) { |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1920 | spin_lock_irq(&hcd_urb_list_lock); |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 1921 | |
| 1922 | /* The list may have changed while we acquired the spinlock */ |
| 1923 | urb = NULL; |
| 1924 | if (!list_empty (&ep->urb_list)) { |
| 1925 | urb = list_entry (ep->urb_list.prev, struct urb, |
| 1926 | urb_list); |
| 1927 | usb_get_urb (urb); |
| 1928 | } |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1929 | spin_unlock_irq(&hcd_urb_list_lock); |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 1930 | |
| 1931 | if (urb) { |
| 1932 | usb_kill_urb (urb); |
| 1933 | usb_put_urb (urb); |
| 1934 | } |
| 1935 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | } |
| 1937 | |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1938 | /** |
Randy Dunlap | 70445ae | 2009-12-13 10:17:16 -0800 | [diff] [blame] | 1939 | * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds |
| 1940 | * the bus bandwidth |
| 1941 | * @udev: target &usb_device |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1942 | * @new_config: new configuration to install |
| 1943 | * @cur_alt: the current alternate interface setting |
| 1944 | * @new_alt: alternate interface setting that is being installed |
| 1945 | * |
| 1946 | * To change configurations, pass in the new configuration in new_config, |
| 1947 | * and pass NULL for cur_alt and new_alt. |
| 1948 | * |
| 1949 | * To reset a device's configuration (put the device in the ADDRESSED state), |
| 1950 | * pass in NULL for new_config, cur_alt, and new_alt. |
| 1951 | * |
| 1952 | * To change alternate interface settings, pass in NULL for new_config, |
| 1953 | * pass in the current alternate interface setting in cur_alt, |
| 1954 | * and pass in the new alternate interface setting in new_alt. |
| 1955 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1956 | * Return: An error if the requested bandwidth change exceeds the |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1957 | * bus bandwidth or host controller internal resources. |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1958 | */ |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1959 | int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1960 | struct usb_host_config *new_config, |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1961 | struct usb_host_interface *cur_alt, |
| 1962 | struct usb_host_interface *new_alt) |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1963 | { |
| 1964 | int num_intfs, i, j; |
H Hartley Sweeten | 576a362 | 2009-11-17 14:53:41 -0800 | [diff] [blame] | 1965 | struct usb_host_interface *alt = NULL; |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1966 | int ret = 0; |
| 1967 | struct usb_hcd *hcd; |
| 1968 | struct usb_host_endpoint *ep; |
| 1969 | |
| 1970 | hcd = bus_to_hcd(udev->bus); |
| 1971 | if (!hcd->driver->check_bandwidth) |
| 1972 | return 0; |
| 1973 | |
| 1974 | /* Configuration is being removed - set configuration 0 */ |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1975 | if (!new_config && !cur_alt) { |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1976 | for (i = 1; i < 16; ++i) { |
| 1977 | ep = udev->ep_out[i]; |
| 1978 | if (ep) |
| 1979 | hcd->driver->drop_endpoint(hcd, udev, ep); |
| 1980 | ep = udev->ep_in[i]; |
| 1981 | if (ep) |
| 1982 | hcd->driver->drop_endpoint(hcd, udev, ep); |
| 1983 | } |
| 1984 | hcd->driver->check_bandwidth(hcd, udev); |
| 1985 | return 0; |
| 1986 | } |
| 1987 | /* Check if the HCD says there's enough bandwidth. Enable all endpoints |
| 1988 | * each interface's alt setting 0 and ask the HCD to check the bandwidth |
| 1989 | * of the bus. There will always be bandwidth for endpoint 0, so it's |
| 1990 | * ok to exclude it. |
| 1991 | */ |
| 1992 | if (new_config) { |
| 1993 | num_intfs = new_config->desc.bNumInterfaces; |
| 1994 | /* Remove endpoints (except endpoint 0, which is always on the |
| 1995 | * schedule) from the old config from the schedule |
| 1996 | */ |
| 1997 | for (i = 1; i < 16; ++i) { |
| 1998 | ep = udev->ep_out[i]; |
| 1999 | if (ep) { |
| 2000 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); |
| 2001 | if (ret < 0) |
| 2002 | goto reset; |
| 2003 | } |
| 2004 | ep = udev->ep_in[i]; |
| 2005 | if (ep) { |
| 2006 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); |
| 2007 | if (ret < 0) |
| 2008 | goto reset; |
| 2009 | } |
| 2010 | } |
| 2011 | for (i = 0; i < num_intfs; ++i) { |
Sarah Sharp | d837e21 | 2010-01-05 14:33:29 -0800 | [diff] [blame] | 2012 | struct usb_host_interface *first_alt; |
| 2013 | int iface_num; |
| 2014 | |
| 2015 | first_alt = &new_config->intf_cache[i]->altsetting[0]; |
| 2016 | iface_num = first_alt->desc.bInterfaceNumber; |
Sarah Sharp | 91017f9 | 2009-12-03 09:44:34 -0800 | [diff] [blame] | 2017 | /* Set up endpoints for alternate interface setting 0 */ |
Sarah Sharp | d837e21 | 2010-01-05 14:33:29 -0800 | [diff] [blame] | 2018 | alt = usb_find_alt_setting(new_config, iface_num, 0); |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 2019 | if (!alt) |
| 2020 | /* No alt setting 0? Pick the first setting. */ |
Sarah Sharp | d837e21 | 2010-01-05 14:33:29 -0800 | [diff] [blame] | 2021 | alt = first_alt; |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 2022 | |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 2023 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { |
| 2024 | ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); |
| 2025 | if (ret < 0) |
| 2026 | goto reset; |
| 2027 | } |
| 2028 | } |
| 2029 | } |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 2030 | if (cur_alt && new_alt) { |
Sarah Sharp | 04a723e | 2010-01-06 10:16:51 -0800 | [diff] [blame] | 2031 | struct usb_interface *iface = usb_ifnum_to_if(udev, |
| 2032 | cur_alt->desc.bInterfaceNumber); |
| 2033 | |
Sarah Sharp | 8a9af4f | 2011-08-09 16:31:54 -0700 | [diff] [blame] | 2034 | if (!iface) |
| 2035 | return -EINVAL; |
Sarah Sharp | 04a723e | 2010-01-06 10:16:51 -0800 | [diff] [blame] | 2036 | if (iface->resetting_device) { |
| 2037 | /* |
| 2038 | * The USB core just reset the device, so the xHCI host |
| 2039 | * and the device will think alt setting 0 is installed. |
| 2040 | * However, the USB core will pass in the alternate |
| 2041 | * setting installed before the reset as cur_alt. Dig |
| 2042 | * out the alternate setting 0 structure, or the first |
| 2043 | * alternate setting if a broken device doesn't have alt |
| 2044 | * setting 0. |
| 2045 | */ |
| 2046 | cur_alt = usb_altnum_to_altsetting(iface, 0); |
| 2047 | if (!cur_alt) |
| 2048 | cur_alt = &iface->altsetting[0]; |
| 2049 | } |
| 2050 | |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 2051 | /* Drop all the endpoints in the current alt setting */ |
| 2052 | for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { |
| 2053 | ret = hcd->driver->drop_endpoint(hcd, udev, |
| 2054 | &cur_alt->endpoint[i]); |
| 2055 | if (ret < 0) |
| 2056 | goto reset; |
| 2057 | } |
| 2058 | /* Add all the endpoints in the new alt setting */ |
| 2059 | for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { |
| 2060 | ret = hcd->driver->add_endpoint(hcd, udev, |
| 2061 | &new_alt->endpoint[i]); |
| 2062 | if (ret < 0) |
| 2063 | goto reset; |
| 2064 | } |
| 2065 | } |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 2066 | ret = hcd->driver->check_bandwidth(hcd, udev); |
| 2067 | reset: |
| 2068 | if (ret < 0) |
| 2069 | hcd->driver->reset_bandwidth(hcd, udev); |
| 2070 | return ret; |
| 2071 | } |
| 2072 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 2073 | /* Disables the endpoint: synchronizes with the hcd to make sure all |
| 2074 | * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must |
| 2075 | * have been called previously. Use for set_configuration, set_interface, |
| 2076 | * driver removal, physical disconnect. |
| 2077 | * |
| 2078 | * example: a qh stored in ep->hcpriv, holding state related to endpoint |
| 2079 | * type, maxpacket size, toggle, halt status, and scheduling. |
| 2080 | */ |
| 2081 | void usb_hcd_disable_endpoint(struct usb_device *udev, |
| 2082 | struct usb_host_endpoint *ep) |
| 2083 | { |
| 2084 | struct usb_hcd *hcd; |
| 2085 | |
| 2086 | might_sleep(); |
| 2087 | hcd = bus_to_hcd(udev->bus); |
| 2088 | if (hcd->driver->endpoint_disable) |
| 2089 | hcd->driver->endpoint_disable(hcd, ep); |
| 2090 | } |
| 2091 | |
David Vrabel | 3444b26 | 2009-04-08 17:36:28 +0000 | [diff] [blame] | 2092 | /** |
| 2093 | * usb_hcd_reset_endpoint - reset host endpoint state |
| 2094 | * @udev: USB device. |
| 2095 | * @ep: the endpoint to reset. |
| 2096 | * |
| 2097 | * Resets any host endpoint state such as the toggle bit, sequence |
| 2098 | * number and current window. |
| 2099 | */ |
| 2100 | void usb_hcd_reset_endpoint(struct usb_device *udev, |
| 2101 | struct usb_host_endpoint *ep) |
| 2102 | { |
| 2103 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| 2104 | |
| 2105 | if (hcd->driver->endpoint_reset) |
| 2106 | hcd->driver->endpoint_reset(hcd, ep); |
| 2107 | else { |
| 2108 | int epnum = usb_endpoint_num(&ep->desc); |
| 2109 | int is_out = usb_endpoint_dir_out(&ep->desc); |
| 2110 | int is_control = usb_endpoint_xfer_control(&ep->desc); |
| 2111 | |
| 2112 | usb_settoggle(udev, epnum, is_out, 0); |
| 2113 | if (is_control) |
| 2114 | usb_settoggle(udev, epnum, !is_out, 0); |
| 2115 | } |
| 2116 | } |
| 2117 | |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2118 | /** |
| 2119 | * usb_alloc_streams - allocate bulk endpoint stream IDs. |
| 2120 | * @interface: alternate setting that includes all endpoints. |
| 2121 | * @eps: array of endpoints that need streams. |
| 2122 | * @num_eps: number of endpoints in the array. |
| 2123 | * @num_streams: number of streams to allocate. |
| 2124 | * @mem_flags: flags hcd should use to allocate memory. |
| 2125 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2126 | * Sets up a group of bulk endpoints to have @num_streams stream IDs available. |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2127 | * Drivers may queue multiple transfers to different stream IDs, which may |
| 2128 | * complete in a different order than they were queued. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2129 | * |
| 2130 | * Return: On success, the number of allocated streams. On failure, a negative |
| 2131 | * error code. |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2132 | */ |
| 2133 | int usb_alloc_streams(struct usb_interface *interface, |
| 2134 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 2135 | unsigned int num_streams, gfp_t mem_flags) |
| 2136 | { |
| 2137 | struct usb_hcd *hcd; |
| 2138 | struct usb_device *dev; |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2139 | int i, ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2140 | |
| 2141 | dev = interface_to_usbdev(interface); |
| 2142 | hcd = bus_to_hcd(dev->bus); |
| 2143 | if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) |
| 2144 | return -EINVAL; |
Mathias Nyman | 8a1b272 | 2015-12-10 09:59:25 +0200 | [diff] [blame] | 2145 | if (dev->speed < USB_SPEED_SUPER) |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2146 | return -EINVAL; |
Hans de Goede | 90a646c | 2014-10-01 11:29:14 +0200 | [diff] [blame] | 2147 | if (dev->state < USB_STATE_CONFIGURED) |
| 2148 | return -ENODEV; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2149 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2150 | for (i = 0; i < num_eps; i++) { |
| 2151 | /* Streams only apply to bulk endpoints. */ |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2152 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) |
| 2153 | return -EINVAL; |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2154 | /* Re-alloc is not allowed */ |
| 2155 | if (eps[i]->streams) |
| 2156 | return -EINVAL; |
| 2157 | } |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2158 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2159 | ret = hcd->driver->alloc_streams(hcd, dev, eps, num_eps, |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2160 | num_streams, mem_flags); |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2161 | if (ret < 0) |
| 2162 | return ret; |
| 2163 | |
| 2164 | for (i = 0; i < num_eps; i++) |
| 2165 | eps[i]->streams = ret; |
| 2166 | |
| 2167 | return ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2168 | } |
| 2169 | EXPORT_SYMBOL_GPL(usb_alloc_streams); |
| 2170 | |
| 2171 | /** |
| 2172 | * usb_free_streams - free bulk endpoint stream IDs. |
| 2173 | * @interface: alternate setting that includes all endpoints. |
| 2174 | * @eps: array of endpoints to remove streams from. |
| 2175 | * @num_eps: number of endpoints in the array. |
| 2176 | * @mem_flags: flags hcd should use to allocate memory. |
| 2177 | * |
| 2178 | * Reverts a group of bulk endpoints back to not using stream IDs. |
| 2179 | * Can fail if we are given bad arguments, or HCD is broken. |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2180 | * |
Hans de Goede | 12d4bbc | 2013-10-09 17:19:23 +0200 | [diff] [blame] | 2181 | * Return: 0 on success. On failure, a negative error code. |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2182 | */ |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2183 | int usb_free_streams(struct usb_interface *interface, |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2184 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 2185 | gfp_t mem_flags) |
| 2186 | { |
| 2187 | struct usb_hcd *hcd; |
| 2188 | struct usb_device *dev; |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2189 | int i, ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2190 | |
| 2191 | dev = interface_to_usbdev(interface); |
| 2192 | hcd = bus_to_hcd(dev->bus); |
Mathias Nyman | 8a1b272 | 2015-12-10 09:59:25 +0200 | [diff] [blame] | 2193 | if (dev->speed < USB_SPEED_SUPER) |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2194 | return -EINVAL; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2195 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2196 | /* Double-free is not allowed */ |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2197 | for (i = 0; i < num_eps; i++) |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2198 | if (!eps[i] || !eps[i]->streams) |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2199 | return -EINVAL; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2200 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2201 | ret = hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); |
| 2202 | if (ret < 0) |
| 2203 | return ret; |
| 2204 | |
| 2205 | for (i = 0; i < num_eps; i++) |
| 2206 | eps[i]->streams = 0; |
| 2207 | |
| 2208 | return ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2209 | } |
| 2210 | EXPORT_SYMBOL_GPL(usb_free_streams); |
| 2211 | |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 2212 | /* Protect against drivers that try to unlink URBs after the device |
| 2213 | * is gone, by waiting until all unlinks for @udev are finished. |
| 2214 | * Since we don't currently track URBs by device, simply wait until |
| 2215 | * nothing is running in the locked region of usb_hcd_unlink_urb(). |
| 2216 | */ |
| 2217 | void usb_hcd_synchronize_unlinks(struct usb_device *udev) |
| 2218 | { |
| 2219 | spin_lock_irq(&hcd_urb_unlink_lock); |
| 2220 | spin_unlock_irq(&hcd_urb_unlink_lock); |
| 2221 | } |
| 2222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | /*-------------------------------------------------------------------------*/ |
| 2224 | |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 2225 | /* called in any context */ |
| 2226 | int usb_hcd_get_frame_number (struct usb_device *udev) |
| 2227 | { |
| 2228 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| 2229 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2230 | if (!HCD_RH_RUNNING(hcd)) |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 2231 | return -ESHUTDOWN; |
| 2232 | return hcd->driver->get_frame_number (hcd); |
| 2233 | } |
| 2234 | |
| 2235 | /*-------------------------------------------------------------------------*/ |
| 2236 | |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2237 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | |
Alan Stern | 65bfd29 | 2008-11-25 16:39:18 -0500 | [diff] [blame] | 2239 | int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | { |
Geliang Tang | 6ae706a | 2015-12-23 21:26:51 +0800 | [diff] [blame] | 2241 | struct usb_hcd *hcd = bus_to_hcd(rhdev->bus); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2242 | int status; |
| 2243 | int old_state = hcd->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | |
Alan Stern | 30b1a7a | 2011-09-27 21:54:22 +0200 | [diff] [blame] | 2245 | dev_dbg(&rhdev->dev, "bus %ssuspend, wakeup %d\n", |
| 2246 | (PMSG_IS_AUTO(msg) ? "auto-" : ""), |
| 2247 | rhdev->do_remote_wakeup); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2248 | if (HCD_DEAD(hcd)) { |
| 2249 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); |
| 2250 | return 0; |
| 2251 | } |
| 2252 | |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2253 | if (!hcd->driver->bus_suspend) { |
| 2254 | status = -ENOENT; |
| 2255 | } else { |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2256 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2257 | hcd->state = HC_STATE_QUIESCING; |
| 2258 | status = hcd->driver->bus_suspend(hcd); |
| 2259 | } |
| 2260 | if (status == 0) { |
| 2261 | usb_set_device_state(rhdev, USB_STATE_SUSPENDED); |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2262 | hcd->state = HC_STATE_SUSPENDED; |
Alan Stern | 879d38e | 2012-04-03 15:24:18 -0400 | [diff] [blame] | 2263 | |
| 2264 | /* Did we race with a root-hub wakeup event? */ |
| 2265 | if (rhdev->do_remote_wakeup) { |
| 2266 | char buffer[6]; |
| 2267 | |
| 2268 | status = hcd->driver->hub_status_data(hcd, buffer); |
| 2269 | if (status != 0) { |
| 2270 | dev_dbg(&rhdev->dev, "suspend raced with wakeup event\n"); |
| 2271 | hcd_bus_resume(rhdev, PMSG_AUTO_RESUME); |
| 2272 | status = -EBUSY; |
| 2273 | } |
| 2274 | } |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2275 | } else { |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2276 | spin_lock_irq(&hcd_root_hub_lock); |
| 2277 | if (!HCD_DEAD(hcd)) { |
| 2278 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2279 | hcd->state = old_state; |
| 2280 | } |
| 2281 | spin_unlock_irq(&hcd_root_hub_lock); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2282 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2283 | "suspend", status); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2284 | } |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2285 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | } |
| 2287 | |
Alan Stern | 65bfd29 | 2008-11-25 16:39:18 -0500 | [diff] [blame] | 2288 | int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | { |
Geliang Tang | 6ae706a | 2015-12-23 21:26:51 +0800 | [diff] [blame] | 2290 | struct usb_hcd *hcd = bus_to_hcd(rhdev->bus); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2291 | int status; |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 2292 | int old_state = hcd->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | |
Alan Stern | 30b1a7a | 2011-09-27 21:54:22 +0200 | [diff] [blame] | 2294 | dev_dbg(&rhdev->dev, "usb %sresume\n", |
| 2295 | (PMSG_IS_AUTO(msg) ? "auto-" : "")); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2296 | if (HCD_DEAD(hcd)) { |
| 2297 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); |
| 2298 | return 0; |
| 2299 | } |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 2300 | if (!hcd->driver->bus_resume) |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2301 | return -ENOENT; |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2302 | if (HCD_RH_RUNNING(hcd)) |
David Brownell | 979d519 | 2005-09-22 22:32:24 -0700 | [diff] [blame] | 2303 | return 0; |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2304 | |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2305 | hcd->state = HC_STATE_RESUMING; |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2306 | status = hcd->driver->bus_resume(hcd); |
Alan Stern | bf3d7d4 | 2011-02-02 13:59:33 -0500 | [diff] [blame] | 2307 | clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2308 | if (status == 0) { |
Alan Stern | bfd1e91 | 2012-10-19 11:03:39 -0400 | [diff] [blame] | 2309 | struct usb_device *udev; |
| 2310 | int port1; |
| 2311 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2312 | spin_lock_irq(&hcd_root_hub_lock); |
| 2313 | if (!HCD_DEAD(hcd)) { |
| 2314 | usb_set_device_state(rhdev, rhdev->actconfig |
| 2315 | ? USB_STATE_CONFIGURED |
| 2316 | : USB_STATE_ADDRESS); |
| 2317 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2318 | hcd->state = HC_STATE_RUNNING; |
| 2319 | } |
| 2320 | spin_unlock_irq(&hcd_root_hub_lock); |
Alan Stern | bfd1e91 | 2012-10-19 11:03:39 -0400 | [diff] [blame] | 2321 | |
| 2322 | /* |
| 2323 | * Check whether any of the enabled ports on the root hub are |
| 2324 | * unsuspended. If they are then a TRSMRCY delay is needed |
| 2325 | * (this is what the USB-2 spec calls a "global resume"). |
| 2326 | * Otherwise we can skip the delay. |
| 2327 | */ |
| 2328 | usb_hub_for_each_child(rhdev, port1, udev) { |
| 2329 | if (udev->state != USB_STATE_NOTATTACHED && |
| 2330 | !udev->port_is_suspended) { |
| 2331 | usleep_range(10000, 11000); /* TRSMRCY */ |
| 2332 | break; |
| 2333 | } |
| 2334 | } |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2335 | } else { |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 2336 | hcd->state = old_state; |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2337 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2338 | "resume", status); |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 2339 | if (status != -ESHUTDOWN) |
| 2340 | usb_hc_died(hcd); |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2341 | } |
| 2342 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | } |
| 2344 | |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2345 | /* Workqueue routine for root-hub remote wakeup */ |
| 2346 | static void hcd_resume_work(struct work_struct *work) |
| 2347 | { |
| 2348 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); |
| 2349 | struct usb_device *udev = hcd->self.root_hub; |
| 2350 | |
Alan Stern | 0534d46 | 2010-01-08 12:56:30 -0500 | [diff] [blame] | 2351 | usb_remote_wakeup(udev); |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2352 | } |
| 2353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | /** |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 2355 | * usb_hcd_resume_root_hub - called by HCD to resume its root hub |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | * @hcd: host controller for this root hub |
| 2357 | * |
| 2358 | * The USB host controller calls this function when its root hub is |
| 2359 | * suspended (with the remote wakeup feature enabled) and a remote |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2360 | * wakeup request is received. The routine submits a workqueue request |
| 2361 | * to resume the root hub (that is, manage its downstream ports again). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | */ |
| 2363 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) |
| 2364 | { |
| 2365 | unsigned long flags; |
| 2366 | |
| 2367 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
Alan Stern | ff2f078 | 2010-06-25 14:02:35 -0400 | [diff] [blame] | 2368 | if (hcd->rh_registered) { |
| 2369 | set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
Alan Stern | 9bbdf1e | 2010-01-08 12:57:28 -0500 | [diff] [blame] | 2370 | queue_work(pm_wq, &hcd->wakeup_work); |
Alan Stern | ff2f078 | 2010-06-25 14:02:35 -0400 | [diff] [blame] | 2371 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
| 2373 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
| 2375 | |
Rafael J. Wysocki | ceb6c9c | 2014-11-29 23:47:05 +0100 | [diff] [blame] | 2376 | #endif /* CONFIG_PM */ |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | /*-------------------------------------------------------------------------*/ |
| 2379 | |
| 2380 | #ifdef CONFIG_USB_OTG |
| 2381 | |
| 2382 | /** |
| 2383 | * usb_bus_start_enum - start immediate enumeration (for OTG) |
| 2384 | * @bus: the bus (must use hcd framework) |
| 2385 | * @port_num: 1-based number of port; usually bus->otg_port |
| 2386 | * Context: in_interrupt() |
| 2387 | * |
| 2388 | * Starts enumeration, with an immediate reset followed later by |
Petr Mladek | 37ebb54 | 2014-09-19 17:32:23 +0200 | [diff] [blame] | 2389 | * hub_wq identifying and possibly configuring the device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | * This is needed by OTG controller drivers, where it helps meet |
| 2391 | * HNP protocol timing requirements for starting a port reset. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2392 | * |
| 2393 | * Return: 0 if successful. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2394 | */ |
| 2395 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) |
| 2396 | { |
| 2397 | struct usb_hcd *hcd; |
| 2398 | int status = -EOPNOTSUPP; |
| 2399 | |
| 2400 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, |
| 2401 | * boards with root hubs hooked up to internal devices (instead of |
| 2402 | * just the OTG port) may need more attention to resetting... |
| 2403 | */ |
Geliang Tang | 6ae706a | 2015-12-23 21:26:51 +0800 | [diff] [blame] | 2404 | hcd = bus_to_hcd(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | if (port_num && hcd->driver->start_port_reset) |
| 2406 | status = hcd->driver->start_port_reset(hcd, port_num); |
| 2407 | |
Petr Mladek | 37ebb54 | 2014-09-19 17:32:23 +0200 | [diff] [blame] | 2408 | /* allocate hub_wq shortly after (first) root port reset finishes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | * it may issue others, until at least 50 msecs have passed. |
| 2410 | */ |
| 2411 | if (status == 0) |
| 2412 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); |
| 2413 | return status; |
| 2414 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2415 | EXPORT_SYMBOL_GPL(usb_bus_start_enum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | |
| 2417 | #endif |
| 2418 | |
| 2419 | /*-------------------------------------------------------------------------*/ |
| 2420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2421 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) |
| 2423 | * @irq: the IRQ being raised |
| 2424 | * @__hcd: pointer to the HCD whose IRQ is being signaled |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | * |
| 2426 | * If the controller isn't HALTed, calls the driver's irq handler. |
| 2427 | * Checks whether the controller is now dead. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2428 | * |
| 2429 | * Return: %IRQ_HANDLED if the IRQ was handled. %IRQ_NONE otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2431 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | { |
| 2433 | struct usb_hcd *hcd = __hcd; |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2434 | irqreturn_t rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | |
Alan Stern | 968b822 | 2011-11-03 12:03:38 -0400 | [diff] [blame] | 2436 | if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2437 | rc = IRQ_NONE; |
Alan Stern | 968b822 | 2011-11-03 12:03:38 -0400 | [diff] [blame] | 2438 | else if (hcd->driver->irq(hcd) == IRQ_NONE) |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2439 | rc = IRQ_NONE; |
Alan Stern | 968b822 | 2011-11-03 12:03:38 -0400 | [diff] [blame] | 2440 | else |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2441 | rc = IRQ_HANDLED; |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2442 | |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2443 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | } |
Dong Nguyen | 43b86af | 2010-07-21 16:56:08 -0700 | [diff] [blame] | 2445 | EXPORT_SYMBOL_GPL(usb_hcd_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | |
| 2447 | /*-------------------------------------------------------------------------*/ |
| 2448 | |
| 2449 | /** |
| 2450 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) |
| 2451 | * @hcd: pointer to the HCD representing the controller |
| 2452 | * |
| 2453 | * This is called by bus glue to report a USB host controller that died |
| 2454 | * while operations may still have been pending. It's called automatically |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2455 | * by the PCI glue, so only glue for non-PCI busses should need to call it. |
| 2456 | * |
| 2457 | * Only call this function with the primary HCD. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | */ |
| 2459 | void usb_hc_died (struct usb_hcd *hcd) |
| 2460 | { |
| 2461 | unsigned long flags; |
| 2462 | |
| 2463 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); |
| 2464 | |
| 2465 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2466 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2467 | set_bit(HCD_FLAG_DEAD, &hcd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | if (hcd->rh_registered) { |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2469 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | |
Petr Mladek | 37ebb54 | 2014-09-19 17:32:23 +0200 | [diff] [blame] | 2471 | /* make hub_wq clean up old urbs and devices */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2472 | usb_set_device_state (hcd->self.root_hub, |
| 2473 | USB_STATE_NOTATTACHED); |
Petr Mladek | 59d48b3 | 2014-09-19 17:32:22 +0200 | [diff] [blame] | 2474 | usb_kick_hub_wq(hcd->self.root_hub); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | } |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2476 | if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { |
| 2477 | hcd = hcd->shared_hcd; |
| 2478 | if (hcd->rh_registered) { |
| 2479 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
| 2480 | |
Petr Mladek | 37ebb54 | 2014-09-19 17:32:23 +0200 | [diff] [blame] | 2481 | /* make hub_wq clean up old urbs and devices */ |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2482 | usb_set_device_state(hcd->self.root_hub, |
| 2483 | USB_STATE_NOTATTACHED); |
Petr Mladek | 59d48b3 | 2014-09-19 17:32:22 +0200 | [diff] [blame] | 2484 | usb_kick_hub_wq(hcd->self.root_hub); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2485 | } |
| 2486 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2488 | /* Make sure that the other roothub is also deallocated. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | } |
| 2490 | EXPORT_SYMBOL_GPL (usb_hc_died); |
| 2491 | |
| 2492 | /*-------------------------------------------------------------------------*/ |
| 2493 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 2494 | static void init_giveback_urb_bh(struct giveback_urb_bh *bh) |
| 2495 | { |
| 2496 | |
| 2497 | spin_lock_init(&bh->lock); |
| 2498 | INIT_LIST_HEAD(&bh->head); |
| 2499 | tasklet_init(&bh->bh, usb_giveback_urb_bh, (unsigned long)bh); |
| 2500 | } |
| 2501 | |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2502 | struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver, |
| 2503 | struct device *sysdev, struct device *dev, const char *bus_name, |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2504 | struct usb_hcd *primary_hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | { |
| 2506 | struct usb_hcd *hcd; |
| 2507 | |
Pekka Enberg | 7b842b6 | 2005-09-06 15:18:34 -0700 | [diff] [blame] | 2508 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
Wolfram Sang | 36af2db | 2016-08-25 19:38:58 +0200 | [diff] [blame] | 2509 | if (!hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | return NULL; |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2511 | if (primary_hcd == NULL) { |
Chris Bainbridge | feb26ac | 2016-04-25 13:48:38 +0100 | [diff] [blame] | 2512 | hcd->address0_mutex = kmalloc(sizeof(*hcd->address0_mutex), |
| 2513 | GFP_KERNEL); |
| 2514 | if (!hcd->address0_mutex) { |
| 2515 | kfree(hcd); |
| 2516 | dev_dbg(dev, "hcd address0 mutex alloc failed\n"); |
| 2517 | return NULL; |
| 2518 | } |
| 2519 | mutex_init(hcd->address0_mutex); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2520 | hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), |
| 2521 | GFP_KERNEL); |
| 2522 | if (!hcd->bandwidth_mutex) { |
Anton Bondarenko | 1a744d2 | 2017-05-07 01:53:46 +0200 | [diff] [blame] | 2523 | kfree(hcd->address0_mutex); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2524 | kfree(hcd); |
| 2525 | dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); |
| 2526 | return NULL; |
| 2527 | } |
| 2528 | mutex_init(hcd->bandwidth_mutex); |
| 2529 | dev_set_drvdata(dev, hcd); |
| 2530 | } else { |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2531 | mutex_lock(&usb_port_peer_mutex); |
Chris Bainbridge | feb26ac | 2016-04-25 13:48:38 +0100 | [diff] [blame] | 2532 | hcd->address0_mutex = primary_hcd->address0_mutex; |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2533 | hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; |
| 2534 | hcd->primary_hcd = primary_hcd; |
| 2535 | primary_hcd->primary_hcd = primary_hcd; |
| 2536 | hcd->shared_hcd = primary_hcd; |
| 2537 | primary_hcd->shared_hcd = hcd; |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2538 | mutex_unlock(&usb_port_peer_mutex); |
Sarah Sharp | d673bfc | 2010-10-15 08:55:24 -0700 | [diff] [blame] | 2539 | } |
Sarah Sharp | d673bfc | 2010-10-15 08:55:24 -0700 | [diff] [blame] | 2540 | |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2541 | kref_init(&hcd->kref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | |
| 2543 | usb_bus_init(&hcd->self); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | hcd->self.controller = dev; |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2545 | hcd->self.sysdev = sysdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | hcd->self.bus_name = bus_name; |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2547 | hcd->self.uses_dma = (sysdev->dma_mask != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | |
| 2549 | init_timer(&hcd->rh_timer); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 2550 | hcd->rh_timer.function = rh_timer_func; |
| 2551 | hcd->rh_timer.data = (unsigned long) hcd; |
Rafael J. Wysocki | ceb6c9c | 2014-11-29 23:47:05 +0100 | [diff] [blame] | 2552 | #ifdef CONFIG_PM |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2553 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); |
| 2554 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | |
| 2556 | hcd->driver = driver; |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 2557 | hcd->speed = driver->flags & HCD_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : |
| 2559 | "USB Host Controller"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | return hcd; |
| 2561 | } |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2562 | EXPORT_SYMBOL_GPL(__usb_create_hcd); |
| 2563 | |
| 2564 | /** |
| 2565 | * usb_create_shared_hcd - create and initialize an HCD structure |
| 2566 | * @driver: HC driver that will use this hcd |
| 2567 | * @dev: device for this HC, stored in hcd->self.controller |
| 2568 | * @bus_name: value to store in hcd->self.bus_name |
| 2569 | * @primary_hcd: a pointer to the usb_hcd structure that is sharing the |
| 2570 | * PCI device. Only allocate certain resources for the primary HCD |
| 2571 | * Context: !in_interrupt() |
| 2572 | * |
| 2573 | * Allocate a struct usb_hcd, with extra space at the end for the |
| 2574 | * HC driver's private data. Initialize the generic members of the |
| 2575 | * hcd structure. |
| 2576 | * |
| 2577 | * Return: On success, a pointer to the created and initialized HCD structure. |
| 2578 | * On failure (e.g. if memory is unavailable), %NULL. |
| 2579 | */ |
| 2580 | struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
| 2581 | struct device *dev, const char *bus_name, |
| 2582 | struct usb_hcd *primary_hcd) |
| 2583 | { |
| 2584 | return __usb_create_hcd(driver, dev, dev, bus_name, primary_hcd); |
| 2585 | } |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2586 | EXPORT_SYMBOL_GPL(usb_create_shared_hcd); |
| 2587 | |
| 2588 | /** |
| 2589 | * usb_create_hcd - create and initialize an HCD structure |
| 2590 | * @driver: HC driver that will use this hcd |
| 2591 | * @dev: device for this HC, stored in hcd->self.controller |
| 2592 | * @bus_name: value to store in hcd->self.bus_name |
| 2593 | * Context: !in_interrupt() |
| 2594 | * |
| 2595 | * Allocate a struct usb_hcd, with extra space at the end for the |
| 2596 | * HC driver's private data. Initialize the generic members of the |
| 2597 | * hcd structure. |
| 2598 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2599 | * Return: On success, a pointer to the created and initialized HCD |
| 2600 | * structure. On failure (e.g. if memory is unavailable), %NULL. |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2601 | */ |
| 2602 | struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, |
| 2603 | struct device *dev, const char *bus_name) |
| 2604 | { |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2605 | return __usb_create_hcd(driver, dev, dev, bus_name, NULL); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2606 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2607 | EXPORT_SYMBOL_GPL(usb_create_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2609 | /* |
| 2610 | * Roothubs that share one PCI device must also share the bandwidth mutex. |
| 2611 | * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is |
| 2612 | * deallocated. |
| 2613 | * |
Alan Stern | ab2a4bf | 2016-06-27 10:23:10 -0400 | [diff] [blame] | 2614 | * Make sure to deallocate the bandwidth_mutex only when the last HCD is |
| 2615 | * freed. When hcd_release() is called for either hcd in a peer set, |
| 2616 | * invalidate the peer's ->shared_hcd and ->primary_hcd pointers. |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2617 | */ |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2618 | static void hcd_release(struct kref *kref) |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2619 | { |
| 2620 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); |
| 2621 | |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2622 | mutex_lock(&usb_port_peer_mutex); |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2623 | if (hcd->shared_hcd) { |
| 2624 | struct usb_hcd *peer = hcd->shared_hcd; |
| 2625 | |
| 2626 | peer->shared_hcd = NULL; |
Alan Stern | ab2a4bf | 2016-06-27 10:23:10 -0400 | [diff] [blame] | 2627 | peer->primary_hcd = NULL; |
| 2628 | } else { |
| 2629 | kfree(hcd->address0_mutex); |
| 2630 | kfree(hcd->bandwidth_mutex); |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2631 | } |
| 2632 | mutex_unlock(&usb_port_peer_mutex); |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2633 | kfree(hcd); |
| 2634 | } |
| 2635 | |
| 2636 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) |
| 2637 | { |
| 2638 | if (hcd) |
| 2639 | kref_get (&hcd->kref); |
| 2640 | return hcd; |
| 2641 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2642 | EXPORT_SYMBOL_GPL(usb_get_hcd); |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | void usb_put_hcd (struct usb_hcd *hcd) |
| 2645 | { |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2646 | if (hcd) |
| 2647 | kref_put (&hcd->kref, hcd_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2648 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2649 | EXPORT_SYMBOL_GPL(usb_put_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2650 | |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2651 | int usb_hcd_is_primary_hcd(struct usb_hcd *hcd) |
| 2652 | { |
| 2653 | if (!hcd->primary_hcd) |
| 2654 | return 1; |
| 2655 | return hcd == hcd->primary_hcd; |
| 2656 | } |
| 2657 | EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); |
| 2658 | |
Lan Tianyu | 3f5eb14 | 2013-03-19 16:48:12 +0800 | [diff] [blame] | 2659 | int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1) |
| 2660 | { |
| 2661 | if (!hcd->driver->find_raw_port_number) |
| 2662 | return port1; |
| 2663 | |
| 2664 | return hcd->driver->find_raw_port_number(hcd, port1); |
| 2665 | } |
| 2666 | |
Sarah Sharp | 23e0d10 | 2010-10-21 11:14:54 -0700 | [diff] [blame] | 2667 | static int usb_hcd_request_irqs(struct usb_hcd *hcd, |
| 2668 | unsigned int irqnum, unsigned long irqflags) |
| 2669 | { |
| 2670 | int retval; |
| 2671 | |
| 2672 | if (hcd->driver->irq) { |
Greg Kroah-Hartman | e592c5d | 2012-11-13 10:52:52 -0800 | [diff] [blame] | 2673 | |
Sarah Sharp | 23e0d10 | 2010-10-21 11:14:54 -0700 | [diff] [blame] | 2674 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", |
| 2675 | hcd->driver->description, hcd->self.busnum); |
| 2676 | retval = request_irq(irqnum, &usb_hcd_irq, irqflags, |
| 2677 | hcd->irq_descr, hcd); |
| 2678 | if (retval != 0) { |
| 2679 | dev_err(hcd->self.controller, |
| 2680 | "request interrupt %d failed\n", |
| 2681 | irqnum); |
| 2682 | return retval; |
| 2683 | } |
| 2684 | hcd->irq = irqnum; |
| 2685 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, |
| 2686 | (hcd->driver->flags & HCD_MEMORY) ? |
| 2687 | "io mem" : "io base", |
| 2688 | (unsigned long long)hcd->rsrc_start); |
| 2689 | } else { |
Felipe Balbi | cd70469 | 2012-02-29 16:46:23 +0200 | [diff] [blame] | 2690 | hcd->irq = 0; |
Sarah Sharp | 23e0d10 | 2010-10-21 11:14:54 -0700 | [diff] [blame] | 2691 | if (hcd->rsrc_start) |
| 2692 | dev_info(hcd->self.controller, "%s 0x%08llx\n", |
| 2693 | (hcd->driver->flags & HCD_MEMORY) ? |
| 2694 | "io mem" : "io base", |
| 2695 | (unsigned long long)hcd->rsrc_start); |
| 2696 | } |
| 2697 | return 0; |
| 2698 | } |
| 2699 | |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2700 | /* |
| 2701 | * Before we free this root hub, flush in-flight peering attempts |
| 2702 | * and disable peer lookups |
| 2703 | */ |
| 2704 | static void usb_put_invalidate_rhdev(struct usb_hcd *hcd) |
| 2705 | { |
| 2706 | struct usb_device *rhdev; |
| 2707 | |
| 2708 | mutex_lock(&usb_port_peer_mutex); |
| 2709 | rhdev = hcd->self.root_hub; |
| 2710 | hcd->self.root_hub = NULL; |
| 2711 | mutex_unlock(&usb_port_peer_mutex); |
| 2712 | usb_put_dev(rhdev); |
| 2713 | } |
| 2714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | /** |
| 2716 | * usb_add_hcd - finish generic HCD structure initialization and register |
| 2717 | * @hcd: the usb_hcd structure to initialize |
| 2718 | * @irqnum: Interrupt line to allocate |
| 2719 | * @irqflags: Interrupt type flags |
| 2720 | * |
| 2721 | * Finish the remaining parts of generic HCD initialization: allocate the |
| 2722 | * buffers of consistent memory, register the bus, request the IRQ line, |
| 2723 | * and call the driver's reset() and start() routines. |
| 2724 | */ |
| 2725 | int usb_add_hcd(struct usb_hcd *hcd, |
| 2726 | unsigned int irqnum, unsigned long irqflags) |
| 2727 | { |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2728 | int retval; |
| 2729 | struct usb_device *rhdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2730 | |
Antoine Tenart | 3d46e73 | 2014-09-24 23:05:50 +0400 | [diff] [blame] | 2731 | if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->usb_phy) { |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2732 | struct usb_phy *phy = usb_get_phy_dev(hcd->self.sysdev, 0); |
Valentine Barshak | 1ae5799 | 2013-12-04 01:42:22 +0400 | [diff] [blame] | 2733 | |
| 2734 | if (IS_ERR(phy)) { |
| 2735 | retval = PTR_ERR(phy); |
| 2736 | if (retval == -EPROBE_DEFER) |
| 2737 | return retval; |
| 2738 | } else { |
| 2739 | retval = usb_phy_init(phy); |
| 2740 | if (retval) { |
| 2741 | usb_put_phy(phy); |
| 2742 | return retval; |
| 2743 | } |
Antoine Tenart | 3d46e73 | 2014-09-24 23:05:50 +0400 | [diff] [blame] | 2744 | hcd->usb_phy = phy; |
Valentine Barshak | 1ae5799 | 2013-12-04 01:42:22 +0400 | [diff] [blame] | 2745 | hcd->remove_phy = 1; |
| 2746 | } |
| 2747 | } |
| 2748 | |
Antoine Tenart | ef44cb4 | 2014-10-30 18:41:16 +0100 | [diff] [blame] | 2749 | if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) { |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2750 | struct phy *phy = phy_get(hcd->self.sysdev, "usb"); |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 2751 | |
| 2752 | if (IS_ERR(phy)) { |
| 2753 | retval = PTR_ERR(phy); |
| 2754 | if (retval == -EPROBE_DEFER) |
| 2755 | goto err_phy; |
| 2756 | } else { |
| 2757 | retval = phy_init(phy); |
| 2758 | if (retval) { |
| 2759 | phy_put(phy); |
| 2760 | goto err_phy; |
| 2761 | } |
| 2762 | retval = phy_power_on(phy); |
| 2763 | if (retval) { |
| 2764 | phy_exit(phy); |
| 2765 | phy_put(phy); |
| 2766 | goto err_phy; |
| 2767 | } |
| 2768 | hcd->phy = phy; |
Antoine Tenart | ef44cb4 | 2014-10-30 18:41:16 +0100 | [diff] [blame] | 2769 | hcd->remove_phy = 1; |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 2770 | } |
| 2771 | } |
| 2772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); |
| 2774 | |
Carl-Daniel Hailfinger | c4fc234 | 2011-05-31 21:31:08 +0200 | [diff] [blame] | 2775 | /* Keep old behaviour if authorized_default is not in [0, 1]. */ |
Stefan Koch | ff8e2c5 | 2015-08-25 21:10:11 +0200 | [diff] [blame] | 2776 | if (authorized_default < 0 || authorized_default > 1) { |
| 2777 | if (hcd->wireless) |
| 2778 | clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); |
| 2779 | else |
| 2780 | set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); |
| 2781 | } else { |
| 2782 | if (authorized_default) |
| 2783 | set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); |
| 2784 | else |
| 2785 | clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); |
| 2786 | } |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 2787 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 2788 | |
Stefan Koch | 6b2bd3c | 2015-08-25 21:10:06 +0200 | [diff] [blame] | 2789 | /* per default all interfaces are authorized */ |
| 2790 | set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags); |
| 2791 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2792 | /* HC is in reset state, but accessible. Now do the one-time init, |
Petr Mladek | 37ebb54 | 2014-09-19 17:32:23 +0200 | [diff] [blame] | 2793 | * bottom up so that hcds can customize the root hubs before hub_wq |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2794 | * starts talking to them. (Note, bus id is assigned early too.) |
| 2795 | */ |
Kris Borer | 0faaad4 | 2015-07-14 09:28:30 -0400 | [diff] [blame] | 2796 | retval = hcd_buffer_create(hcd); |
| 2797 | if (retval != 0) { |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2798 | dev_dbg(hcd->self.sysdev, "pool alloc failed\n"); |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 2799 | goto err_create_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2800 | } |
| 2801 | |
Kris Borer | 0faaad4 | 2015-07-14 09:28:30 -0400 | [diff] [blame] | 2802 | retval = usb_register_bus(&hcd->self); |
| 2803 | if (retval < 0) |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2804 | goto err_register_bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | |
Greg Kroah-Hartman | c688d62 | 2015-04-30 11:32:52 +0200 | [diff] [blame] | 2806 | rhdev = usb_alloc_dev(NULL, &hcd->self, 0); |
| 2807 | if (rhdev == NULL) { |
Arnd Bergmann | a8c06e4 | 2017-03-13 10:18:41 +0800 | [diff] [blame] | 2808 | dev_err(hcd->self.sysdev, "unable to allocate root hub\n"); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2809 | retval = -ENOMEM; |
| 2810 | goto err_allocate_root_hub; |
| 2811 | } |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2812 | mutex_lock(&usb_port_peer_mutex); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2813 | hcd->self.root_hub = rhdev; |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2814 | mutex_unlock(&usb_port_peer_mutex); |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2815 | |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 2816 | switch (hcd->speed) { |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2817 | case HCD_USB11: |
| 2818 | rhdev->speed = USB_SPEED_FULL; |
| 2819 | break; |
| 2820 | case HCD_USB2: |
| 2821 | rhdev->speed = USB_SPEED_HIGH; |
| 2822 | break; |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 2823 | case HCD_USB25: |
| 2824 | rhdev->speed = USB_SPEED_WIRELESS; |
| 2825 | break; |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2826 | case HCD_USB3: |
| 2827 | rhdev->speed = USB_SPEED_SUPER; |
| 2828 | break; |
Mathias Nyman | 5f9c3a6 | 2015-12-10 09:59:26 +0200 | [diff] [blame] | 2829 | case HCD_USB31: |
| 2830 | rhdev->speed = USB_SPEED_SUPER_PLUS; |
| 2831 | break; |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2832 | default: |
Sebastian Andrzej Siewior | 1d15ee4 | 2011-04-14 11:22:32 +0200 | [diff] [blame] | 2833 | retval = -EINVAL; |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2834 | goto err_set_rh_speed; |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2835 | } |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2836 | |
David Brownell | db4cefa | 2006-05-01 22:07:13 -0700 | [diff] [blame] | 2837 | /* wakeup flag init defaults to "everything works" for root hubs, |
| 2838 | * but drivers can override it in reset() if needed, along with |
| 2839 | * recording the overall controller's system wakeup capability. |
| 2840 | */ |
Alan Stern | a6eeeb9 | 2011-09-26 11:23:38 -0400 | [diff] [blame] | 2841 | device_set_wakeup_capable(&rhdev->dev, 1); |
David Brownell | db4cefa | 2006-05-01 22:07:13 -0700 | [diff] [blame] | 2842 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2843 | /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is |
| 2844 | * registered. But since the controller can die at any time, |
| 2845 | * let's initialize the flag before touching the hardware. |
| 2846 | */ |
| 2847 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2848 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2849 | /* "reset" is misnamed; its role is now one-time init. the controller |
| 2850 | * should already have been reset (and boot firmware kicked off etc). |
| 2851 | */ |
Kris Borer | 0faaad4 | 2015-07-14 09:28:30 -0400 | [diff] [blame] | 2852 | if (hcd->driver->reset) { |
| 2853 | retval = hcd->driver->reset(hcd); |
| 2854 | if (retval < 0) { |
| 2855 | dev_err(hcd->self.controller, "can't setup: %d\n", |
| 2856 | retval); |
| 2857 | goto err_hcd_driver_setup; |
| 2858 | } |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2859 | } |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2860 | hcd->rh_pollable = 1; |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2861 | |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 2862 | /* NOTE: root hub and controller capabilities may not be the same */ |
| 2863 | if (device_can_wakeup(hcd->self.controller) |
| 2864 | && device_can_wakeup(&hcd->self.root_hub->dev)) |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2865 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2866 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 2867 | /* initialize tasklets */ |
| 2868 | init_giveback_urb_bh(&hcd->high_prio_bh); |
| 2869 | init_giveback_urb_bh(&hcd->low_prio_bh); |
| 2870 | |
Sarah Sharp | 68d07f6 | 2012-02-13 16:25:57 -0800 | [diff] [blame] | 2871 | /* enable irqs just before we start the controller, |
| 2872 | * if the BIOS provides legacy PCI irqs. |
| 2873 | */ |
| 2874 | if (usb_hcd_is_primary_hcd(hcd) && irqnum) { |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2875 | retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); |
| 2876 | if (retval) |
| 2877 | goto err_request_irq; |
| 2878 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2879 | |
Sarah Sharp | 4814030 | 2011-03-11 13:46:17 -0800 | [diff] [blame] | 2880 | hcd->state = HC_STATE_RUNNING; |
Sarah Sharp | abc4f9b | 2010-12-01 09:22:05 -0800 | [diff] [blame] | 2881 | retval = hcd->driver->start(hcd); |
| 2882 | if (retval < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2883 | dev_err(hcd->self.controller, "startup error %d\n", retval); |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2884 | goto err_hcd_driver_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | } |
| 2886 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2887 | /* starting here, usbcore will pay attention to this root hub */ |
Kris Borer | 0faaad4 | 2015-07-14 09:28:30 -0400 | [diff] [blame] | 2888 | retval = register_root_hub(hcd); |
| 2889 | if (retval != 0) |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2890 | goto err_register_root_hub; |
| 2891 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 2892 | retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
| 2893 | if (retval < 0) { |
| 2894 | printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", |
| 2895 | retval); |
| 2896 | goto error_create_attr_group; |
| 2897 | } |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2898 | if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 2899 | usb_hcd_poll_rh_status(hcd); |
Alan Stern | a6eeeb9 | 2011-09-26 11:23:38 -0400 | [diff] [blame] | 2900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | return retval; |
| 2902 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 2903 | error_create_attr_group: |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2904 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2905 | if (HC_IS_RUNNING(hcd->state)) |
| 2906 | hcd->state = HC_STATE_QUIESCING; |
| 2907 | spin_lock_irq(&hcd_root_hub_lock); |
| 2908 | hcd->rh_registered = 0; |
| 2909 | spin_unlock_irq(&hcd_root_hub_lock); |
| 2910 | |
Rafael J. Wysocki | ceb6c9c | 2014-11-29 23:47:05 +0100 | [diff] [blame] | 2911 | #ifdef CONFIG_PM |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2912 | cancel_work_sync(&hcd->wakeup_work); |
| 2913 | #endif |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 2914 | mutex_lock(&usb_bus_idr_lock); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2915 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 2916 | mutex_unlock(&usb_bus_idr_lock); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2917 | err_register_root_hub: |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2918 | hcd->rh_pollable = 0; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2919 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2920 | del_timer_sync(&hcd->rh_timer); |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2921 | hcd->driver->stop(hcd); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2922 | hcd->state = HC_STATE_HALT; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2923 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2924 | del_timer_sync(&hcd->rh_timer); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2925 | err_hcd_driver_start: |
Felipe Balbi | cd70469 | 2012-02-29 16:46:23 +0200 | [diff] [blame] | 2926 | if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | free_irq(irqnum, hcd); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2928 | err_request_irq: |
| 2929 | err_hcd_driver_setup: |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2930 | err_set_rh_speed: |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 2931 | usb_put_invalidate_rhdev(hcd); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2932 | err_allocate_root_hub: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | usb_deregister_bus(&hcd->self); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2934 | err_register_bus: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | hcd_buffer_destroy(hcd); |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 2936 | err_create_buf: |
Antoine Tenart | ef44cb4 | 2014-10-30 18:41:16 +0100 | [diff] [blame] | 2937 | if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) { |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 2938 | phy_power_off(hcd->phy); |
| 2939 | phy_exit(hcd->phy); |
| 2940 | phy_put(hcd->phy); |
| 2941 | hcd->phy = NULL; |
| 2942 | } |
| 2943 | err_phy: |
Antoine Tenart | 3d46e73 | 2014-09-24 23:05:50 +0400 | [diff] [blame] | 2944 | if (hcd->remove_phy && hcd->usb_phy) { |
| 2945 | usb_phy_shutdown(hcd->usb_phy); |
| 2946 | usb_put_phy(hcd->usb_phy); |
| 2947 | hcd->usb_phy = NULL; |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 2948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2949 | return retval; |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 2950 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2951 | EXPORT_SYMBOL_GPL(usb_add_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | |
| 2953 | /** |
| 2954 | * usb_remove_hcd - shutdown processing for generic HCDs |
| 2955 | * @hcd: the usb_hcd structure to remove |
| 2956 | * Context: !in_interrupt() |
| 2957 | * |
| 2958 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), |
| 2959 | * invoking the HCD's stop() method. |
| 2960 | */ |
| 2961 | void usb_remove_hcd(struct usb_hcd *hcd) |
| 2962 | { |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2963 | struct usb_device *rhdev = hcd->self.root_hub; |
| 2964 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); |
| 2966 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2967 | usb_get_dev(rhdev); |
| 2968 | sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2969 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2970 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | if (HC_IS_RUNNING (hcd->state)) |
| 2972 | hcd->state = HC_STATE_QUIESCING; |
| 2973 | |
| 2974 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); |
| 2975 | spin_lock_irq (&hcd_root_hub_lock); |
| 2976 | hcd->rh_registered = 0; |
| 2977 | spin_unlock_irq (&hcd_root_hub_lock); |
Alan Stern | 9ad3d6c | 2005-11-17 17:10:32 -0500 | [diff] [blame] | 2978 | |
Rafael J. Wysocki | ceb6c9c | 2014-11-29 23:47:05 +0100 | [diff] [blame] | 2979 | #ifdef CONFIG_PM |
Alan Stern | d5d4db7 | 2007-05-29 16:34:52 -0400 | [diff] [blame] | 2980 | cancel_work_sync(&hcd->wakeup_work); |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2981 | #endif |
| 2982 | |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 2983 | mutex_lock(&usb_bus_idr_lock); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2984 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
Heiner Kallweit | a4b5d60 | 2016-02-03 23:35:23 +0100 | [diff] [blame] | 2985 | mutex_unlock(&usb_bus_idr_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 2987 | /* |
| 2988 | * tasklet_kill() isn't needed here because: |
| 2989 | * - driver's disconnect() called from usb_disconnect() should |
| 2990 | * make sure its URBs are completed during the disconnect() |
| 2991 | * callback |
| 2992 | * |
| 2993 | * - it is too late to run complete() here since driver may have |
| 2994 | * been removed already now |
| 2995 | */ |
| 2996 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2997 | /* Prevent any more root-hub status calls from the timer. |
| 2998 | * The HCD might still restart the timer (if a port status change |
| 2999 | * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke |
| 3000 | * the hub_status_data() callback. |
| 3001 | */ |
| 3002 | hcd->rh_pollable = 0; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 3003 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 3004 | del_timer_sync(&hcd->rh_timer); |
| 3005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | hcd->driver->stop(hcd); |
| 3007 | hcd->state = HC_STATE_HALT; |
| 3008 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 3009 | /* In case the HCD restarted the timer, stop it again. */ |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 3010 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 1b42ae6 | 2007-03-13 11:10:52 -0400 | [diff] [blame] | 3011 | del_timer_sync(&hcd->rh_timer); |
| 3012 | |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 3013 | if (usb_hcd_is_primary_hcd(hcd)) { |
Felipe Balbi | cd70469 | 2012-02-29 16:46:23 +0200 | [diff] [blame] | 3014 | if (hcd->irq > 0) |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 3015 | free_irq(hcd->irq, hcd); |
| 3016 | } |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 3017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | usb_deregister_bus(&hcd->self); |
| 3019 | hcd_buffer_destroy(hcd); |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 3020 | |
Antoine Tenart | ef44cb4 | 2014-10-30 18:41:16 +0100 | [diff] [blame] | 3021 | if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) { |
Sergei Shtylyov | 0043325 | 2014-09-24 23:09:44 +0400 | [diff] [blame] | 3022 | phy_power_off(hcd->phy); |
| 3023 | phy_exit(hcd->phy); |
| 3024 | phy_put(hcd->phy); |
| 3025 | hcd->phy = NULL; |
| 3026 | } |
Antoine Tenart | 3d46e73 | 2014-09-24 23:05:50 +0400 | [diff] [blame] | 3027 | if (hcd->remove_phy && hcd->usb_phy) { |
| 3028 | usb_phy_shutdown(hcd->usb_phy); |
| 3029 | usb_put_phy(hcd->usb_phy); |
| 3030 | hcd->usb_phy = NULL; |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 3031 | } |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame] | 3032 | |
| 3033 | usb_put_invalidate_rhdev(hcd); |
William wu | 76b8db0 | 2017-01-13 11:04:22 +0800 | [diff] [blame] | 3034 | hcd->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3035 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 3036 | EXPORT_SYMBOL_GPL(usb_remove_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 3038 | void |
Matthias Beyer | 842c196 | 2013-10-05 18:02:06 +0200 | [diff] [blame] | 3039 | usb_hcd_platform_shutdown(struct platform_device *dev) |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 3040 | { |
| 3041 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
| 3042 | |
| 3043 | if (hcd->driver->shutdown) |
| 3044 | hcd->driver->shutdown(hcd); |
| 3045 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 3046 | EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 3047 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3048 | /*-------------------------------------------------------------------------*/ |
| 3049 | |
Javier Martinez Canillas | f7b7f37 | 2016-08-18 09:45:04 -0400 | [diff] [blame] | 3050 | #if IS_ENABLED(CONFIG_USB_MON) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | |
Julia Lawall | 6fb8ac8 | 2015-11-28 16:07:10 +0100 | [diff] [blame] | 3052 | const struct usb_mon_operations *mon_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3053 | |
| 3054 | /* |
| 3055 | * The registration is unlocked. |
| 3056 | * We do it this way because we do not want to lock in hot paths. |
| 3057 | * |
| 3058 | * Notice that the code is minimally error-proof. Because usbmon needs |
| 3059 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. |
| 3060 | */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 3061 | |
Julia Lawall | 6fb8ac8 | 2015-11-28 16:07:10 +0100 | [diff] [blame] | 3062 | int usb_mon_register(const struct usb_mon_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3063 | { |
| 3064 | |
| 3065 | if (mon_ops) |
| 3066 | return -EBUSY; |
| 3067 | |
| 3068 | mon_ops = ops; |
| 3069 | mb(); |
| 3070 | return 0; |
| 3071 | } |
| 3072 | EXPORT_SYMBOL_GPL (usb_mon_register); |
| 3073 | |
| 3074 | void usb_mon_deregister (void) |
| 3075 | { |
| 3076 | |
| 3077 | if (mon_ops == NULL) { |
| 3078 | printk(KERN_ERR "USB: monitor was not registered\n"); |
| 3079 | return; |
| 3080 | } |
| 3081 | mon_ops = NULL; |
| 3082 | mb(); |
| 3083 | } |
| 3084 | EXPORT_SYMBOL_GPL (usb_mon_deregister); |
| 3085 | |
Pete Zaitcev | f150fa1 | 2008-11-13 21:31:21 -0700 | [diff] [blame] | 3086 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |