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 | |
| 45 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 46 | #include <linux/usb/hcd.h> |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 47 | #include <linux/usb/phy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include "usb.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | /*-------------------------------------------------------------------------*/ |
| 53 | |
| 54 | /* |
| 55 | * USB Host Controller Driver framework |
| 56 | * |
| 57 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing |
| 58 | * HCD-specific behaviors/bugs. |
| 59 | * |
| 60 | * This does error checks, tracks devices and urbs, and delegates to a |
| 61 | * "hc_driver" only for code (and data) that really needs to know about |
| 62 | * hardware differences. That includes root hub registers, i/o queues, |
| 63 | * and so on ... but as little else as possible. |
| 64 | * |
| 65 | * Shared code includes most of the "root hub" code (these are emulated, |
| 66 | * though each HC's hardware works differently) and PCI glue, plus request |
| 67 | * tracking overhead. The HCD code should only block on spinlocks or on |
| 68 | * hardware handshaking; blocking on software events (such as other kernel |
| 69 | * threads releasing resources, or completing actions) is all generic. |
| 70 | * |
| 71 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", |
| 72 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used |
| 73 | * only by the hub driver ... and that neither should be seen or used by |
| 74 | * usb client device drivers. |
| 75 | * |
| 76 | * Contributors of ideas or unattributed patches include: David Brownell, |
| 77 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... |
| 78 | * |
| 79 | * HISTORY: |
| 80 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some |
| 81 | * associated cleanup. "usb_hcd" still != "usb_bus". |
| 82 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. |
| 83 | */ |
| 84 | |
| 85 | /*-------------------------------------------------------------------------*/ |
| 86 | |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 87 | /* Keep track of which host controller drivers are loaded */ |
| 88 | unsigned long usb_hcds_loaded; |
| 89 | EXPORT_SYMBOL_GPL(usb_hcds_loaded); |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | /* host controllers we manage */ |
| 92 | LIST_HEAD (usb_bus_list); |
| 93 | EXPORT_SYMBOL_GPL (usb_bus_list); |
| 94 | |
| 95 | /* used when allocating bus numbers */ |
| 96 | #define USB_MAXBUS 64 |
Matthias Beyer | 059239a | 2013-10-05 23:09:15 +0200 | [diff] [blame] | 97 | static DECLARE_BITMAP(busmap, USB_MAXBUS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | /* used when updating list of hcds */ |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 100 | DEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | EXPORT_SYMBOL_GPL (usb_bus_list_lock); |
| 102 | |
| 103 | /* used for controlling access to virtual root hubs */ |
| 104 | static DEFINE_SPINLOCK(hcd_root_hub_lock); |
| 105 | |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 106 | /* used when updating an endpoint's URB list */ |
| 107 | static DEFINE_SPINLOCK(hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 109 | /* used to protect against unlinking URBs after the device is gone */ |
| 110 | static DEFINE_SPINLOCK(hcd_urb_unlink_lock); |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* wait queue for synchronous unlinks */ |
| 113 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); |
| 114 | |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 115 | static inline int is_root_hub(struct usb_device *udev) |
| 116 | { |
| 117 | return (udev->parent == NULL); |
| 118 | } |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | /*-------------------------------------------------------------------------*/ |
| 121 | |
| 122 | /* |
| 123 | * Sharable chunks of root hub code. |
| 124 | */ |
| 125 | |
| 126 | /*-------------------------------------------------------------------------*/ |
Sebastian Andrzej Siewior | b53d657 | 2012-09-07 14:31:45 +0200 | [diff] [blame] | 127 | #define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff)) |
| 128 | #define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 130 | /* usb 3.0 root hub device descriptor */ |
| 131 | static const u8 usb3_rh_dev_descriptor[18] = { |
| 132 | 0x12, /* __u8 bLength; */ |
| 133 | 0x01, /* __u8 bDescriptorType; Device */ |
| 134 | 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ |
| 135 | |
| 136 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 137 | 0x00, /* __u8 bDeviceSubClass; */ |
| 138 | 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ |
| 139 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ |
| 140 | |
Paul Bolle | bfb8bfa | 2012-05-05 13:16:51 +0200 | [diff] [blame] | 141 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
Alan Stern | cd78069 | 2010-02-25 13:19:37 -0500 | [diff] [blame] | 142 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 143 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 144 | |
| 145 | 0x03, /* __u8 iManufacturer; */ |
| 146 | 0x02, /* __u8 iProduct; */ |
| 147 | 0x01, /* __u8 iSerialNumber; */ |
| 148 | 0x01 /* __u8 bNumConfigurations; */ |
| 149 | }; |
| 150 | |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 151 | /* usb 2.5 (wireless USB 1.0) root hub device descriptor */ |
| 152 | static const u8 usb25_rh_dev_descriptor[18] = { |
| 153 | 0x12, /* __u8 bLength; */ |
| 154 | 0x01, /* __u8 bDescriptorType; Device */ |
| 155 | 0x50, 0x02, /* __le16 bcdUSB; v2.5 */ |
| 156 | |
| 157 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 158 | 0x00, /* __u8 bDeviceSubClass; */ |
| 159 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
| 160 | 0xFF, /* __u8 bMaxPacketSize0; always 0xFF (WUSB Spec 7.4.1). */ |
| 161 | |
| 162 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
| 163 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
| 164 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 165 | |
| 166 | 0x03, /* __u8 iManufacturer; */ |
| 167 | 0x02, /* __u8 iProduct; */ |
| 168 | 0x01, /* __u8 iSerialNumber; */ |
| 169 | 0x01 /* __u8 bNumConfigurations; */ |
| 170 | }; |
| 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | /* usb 2.0 root hub device descriptor */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 173 | static const u8 usb2_rh_dev_descriptor[18] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | 0x12, /* __u8 bLength; */ |
| 175 | 0x01, /* __u8 bDescriptorType; Device */ |
| 176 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ |
| 177 | |
| 178 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 179 | 0x00, /* __u8 bDeviceSubClass; */ |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 180 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
Alan Stern | 16f16d1 | 2005-10-24 15:41:19 -0400 | [diff] [blame] | 181 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Paul Bolle | bfb8bfa | 2012-05-05 13:16:51 +0200 | [diff] [blame] | 183 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
Greg Kroah-Hartman | 667d691 | 2008-01-28 09:50:12 -0800 | [diff] [blame] | 184 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 186 | |
| 187 | 0x03, /* __u8 iManufacturer; */ |
| 188 | 0x02, /* __u8 iProduct; */ |
| 189 | 0x01, /* __u8 iSerialNumber; */ |
| 190 | 0x01 /* __u8 bNumConfigurations; */ |
| 191 | }; |
| 192 | |
| 193 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ |
| 194 | |
| 195 | /* usb 1.1 root hub device descriptor */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 196 | static const u8 usb11_rh_dev_descriptor[18] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | 0x12, /* __u8 bLength; */ |
| 198 | 0x01, /* __u8 bDescriptorType; Device */ |
| 199 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ |
| 200 | |
| 201 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ |
| 202 | 0x00, /* __u8 bDeviceSubClass; */ |
| 203 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ |
Alan Stern | 16f16d1 | 2005-10-24 15:41:19 -0400 | [diff] [blame] | 204 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Paul Bolle | bfb8bfa | 2012-05-05 13:16:51 +0200 | [diff] [blame] | 206 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
Greg Kroah-Hartman | 667d691 | 2008-01-28 09:50:12 -0800 | [diff] [blame] | 207 | 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
| 209 | |
| 210 | 0x03, /* __u8 iManufacturer; */ |
| 211 | 0x02, /* __u8 iProduct; */ |
| 212 | 0x01, /* __u8 iSerialNumber; */ |
| 213 | 0x01 /* __u8 bNumConfigurations; */ |
| 214 | }; |
| 215 | |
| 216 | |
| 217 | /*-------------------------------------------------------------------------*/ |
| 218 | |
| 219 | /* Configuration descriptors for our root hubs */ |
| 220 | |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 221 | static const u8 fs_rh_config_descriptor[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | /* one configuration */ |
| 224 | 0x09, /* __u8 bLength; */ |
| 225 | 0x02, /* __u8 bDescriptorType; Configuration */ |
| 226 | 0x19, 0x00, /* __le16 wTotalLength; */ |
| 227 | 0x01, /* __u8 bNumInterfaces; (1) */ |
| 228 | 0x01, /* __u8 bConfigurationValue; */ |
| 229 | 0x00, /* __u8 iConfiguration; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 230 | 0xc0, /* __u8 bmAttributes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | Bit 7: must be set, |
| 232 | 6: Self-powered, |
| 233 | 5: Remote wakeup, |
| 234 | 4..0: resvd */ |
| 235 | 0x00, /* __u8 MaxPower; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | /* USB 1.1: |
| 238 | * USB 2.0, single TT organization (mandatory): |
| 239 | * one interface, protocol 0 |
| 240 | * |
| 241 | * USB 2.0, multiple TT organization (optional): |
| 242 | * two interfaces, protocols 1 (like single TT) |
| 243 | * and 2 (multiple TT mode) ... config is |
| 244 | * sometimes settable |
| 245 | * NOT IMPLEMENTED |
| 246 | */ |
| 247 | |
| 248 | /* one interface */ |
| 249 | 0x09, /* __u8 if_bLength; */ |
| 250 | 0x04, /* __u8 if_bDescriptorType; Interface */ |
| 251 | 0x00, /* __u8 if_bInterfaceNumber; */ |
| 252 | 0x00, /* __u8 if_bAlternateSetting; */ |
| 253 | 0x01, /* __u8 if_bNumEndpoints; */ |
| 254 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ |
| 255 | 0x00, /* __u8 if_bInterfaceSubClass; */ |
| 256 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ |
| 257 | 0x00, /* __u8 if_iInterface; */ |
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 | /* one endpoint (status change endpoint) */ |
| 260 | 0x07, /* __u8 ep_bLength; */ |
| 261 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ |
| 262 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 263 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
| 264 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ |
| 266 | }; |
| 267 | |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 268 | static const u8 hs_rh_config_descriptor[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | /* one configuration */ |
| 271 | 0x09, /* __u8 bLength; */ |
| 272 | 0x02, /* __u8 bDescriptorType; Configuration */ |
| 273 | 0x19, 0x00, /* __le16 wTotalLength; */ |
| 274 | 0x01, /* __u8 bNumInterfaces; (1) */ |
| 275 | 0x01, /* __u8 bConfigurationValue; */ |
| 276 | 0x00, /* __u8 iConfiguration; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 277 | 0xc0, /* __u8 bmAttributes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | Bit 7: must be set, |
| 279 | 6: Self-powered, |
| 280 | 5: Remote wakeup, |
| 281 | 4..0: resvd */ |
| 282 | 0x00, /* __u8 MaxPower; */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | /* USB 1.1: |
| 285 | * USB 2.0, single TT organization (mandatory): |
| 286 | * one interface, protocol 0 |
| 287 | * |
| 288 | * USB 2.0, multiple TT organization (optional): |
| 289 | * two interfaces, protocols 1 (like single TT) |
| 290 | * and 2 (multiple TT mode) ... config is |
| 291 | * sometimes settable |
| 292 | * NOT IMPLEMENTED |
| 293 | */ |
| 294 | |
| 295 | /* one interface */ |
| 296 | 0x09, /* __u8 if_bLength; */ |
| 297 | 0x04, /* __u8 if_bDescriptorType; Interface */ |
| 298 | 0x00, /* __u8 if_bInterfaceNumber; */ |
| 299 | 0x00, /* __u8 if_bAlternateSetting; */ |
| 300 | 0x01, /* __u8 if_bNumEndpoints; */ |
| 301 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ |
| 302 | 0x00, /* __u8 if_bInterfaceSubClass; */ |
| 303 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ |
| 304 | 0x00, /* __u8 if_iInterface; */ |
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 | /* one endpoint (status change endpoint) */ |
| 307 | 0x07, /* __u8 ep_bLength; */ |
| 308 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ |
| 309 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 310 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
inaky@linux.intel.com | 88fafff | 2006-10-11 20:05:59 -0700 | [diff] [blame] | 311 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
| 312 | * see hub.c:hub_configure() for details. */ |
| 313 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
| 315 | }; |
| 316 | |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 317 | static const u8 ss_rh_config_descriptor[] = { |
| 318 | /* one configuration */ |
| 319 | 0x09, /* __u8 bLength; */ |
| 320 | 0x02, /* __u8 bDescriptorType; Configuration */ |
Sarah Sharp | 22c6a35 | 2010-09-13 12:01:02 -0700 | [diff] [blame] | 321 | 0x1f, 0x00, /* __le16 wTotalLength; */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 322 | 0x01, /* __u8 bNumInterfaces; (1) */ |
| 323 | 0x01, /* __u8 bConfigurationValue; */ |
| 324 | 0x00, /* __u8 iConfiguration; */ |
| 325 | 0xc0, /* __u8 bmAttributes; |
| 326 | Bit 7: must be set, |
| 327 | 6: Self-powered, |
| 328 | 5: Remote wakeup, |
| 329 | 4..0: resvd */ |
| 330 | 0x00, /* __u8 MaxPower; */ |
| 331 | |
| 332 | /* one interface */ |
| 333 | 0x09, /* __u8 if_bLength; */ |
| 334 | 0x04, /* __u8 if_bDescriptorType; Interface */ |
| 335 | 0x00, /* __u8 if_bInterfaceNumber; */ |
| 336 | 0x00, /* __u8 if_bAlternateSetting; */ |
| 337 | 0x01, /* __u8 if_bNumEndpoints; */ |
| 338 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ |
| 339 | 0x00, /* __u8 if_bInterfaceSubClass; */ |
| 340 | 0x00, /* __u8 if_bInterfaceProtocol; */ |
| 341 | 0x00, /* __u8 if_iInterface; */ |
| 342 | |
| 343 | /* one endpoint (status change endpoint) */ |
| 344 | 0x07, /* __u8 ep_bLength; */ |
| 345 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ |
| 346 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
| 347 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
| 348 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
| 349 | * see hub.c:hub_configure() for details. */ |
| 350 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, |
Sarah Sharp | 22c6a35 | 2010-09-13 12:01:02 -0700 | [diff] [blame] | 351 | 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
| 352 | |
| 353 | /* one SuperSpeed endpoint companion descriptor */ |
| 354 | 0x06, /* __u8 ss_bLength */ |
| 355 | 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ |
| 356 | 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ |
| 357 | 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ |
| 358 | 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 359 | }; |
| 360 | |
Carl-Daniel Hailfinger | c4fc234 | 2011-05-31 21:31:08 +0200 | [diff] [blame] | 361 | /* authorized_default behaviour: |
| 362 | * -1 is authorized for all devices except wireless (old behaviour) |
| 363 | * 0 is unauthorized for all devices |
| 364 | * 1 is authorized for all devices |
| 365 | */ |
| 366 | static int authorized_default = -1; |
| 367 | module_param(authorized_default, int, S_IRUGO|S_IWUSR); |
| 368 | MODULE_PARM_DESC(authorized_default, |
| 369 | "Default USB device authorization: 0 is not authorized, 1 is " |
| 370 | "authorized, -1 is authorized except for wireless USB (default, " |
| 371 | "old behaviour"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | /*-------------------------------------------------------------------------*/ |
| 373 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 374 | /** |
| 375 | * ascii2desc() - Helper routine for producing UTF-16LE string descriptors |
| 376 | * @s: Null-terminated ASCII (actually ISO-8859-1) string |
| 377 | * @buf: Buffer for USB string descriptor (header + UTF-16LE) |
| 378 | * @len: Length (in bytes; may be odd) of descriptor buffer. |
| 379 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 380 | * Return: The number of bytes filled in: 2 + 2*strlen(s) or @len, |
| 381 | * whichever is less. |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 382 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 383 | * Note: |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 384 | * USB String descriptors can contain at most 126 characters; input |
| 385 | * strings longer than that are truncated. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | */ |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 387 | static unsigned |
| 388 | ascii2desc(char const *s, u8 *buf, unsigned len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | { |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 390 | unsigned n, t = 2 + 2*strlen(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 392 | if (t > 254) |
| 393 | t = 254; /* Longest possible UTF string descriptor */ |
| 394 | if (len > t) |
| 395 | len = t; |
| 396 | |
| 397 | t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ |
| 398 | |
| 399 | n = len; |
| 400 | while (n--) { |
| 401 | *buf++ = t; |
| 402 | if (!n--) |
| 403 | break; |
| 404 | *buf++ = t >> 8; |
| 405 | t = (unsigned char)*s++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | } |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 407 | return len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 410 | /** |
| 411 | * rh_string() - provides string descriptors for root hub |
| 412 | * @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] | 413 | * @hcd: the host controller for this root hub |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 414 | * @data: buffer for output packet |
| 415 | * @len: length of the provided buffer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | * |
| 417 | * Produces either a manufacturer, product or serial number string for the |
| 418 | * virtual root hub device. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 419 | * |
| 420 | * 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] | 421 | * of the provided buffer, whichever is less. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | */ |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 423 | static unsigned |
| 424 | 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] | 425 | { |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 426 | char buf[100]; |
| 427 | char const *s; |
| 428 | static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 430 | /* language ids */ |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 431 | switch (id) { |
| 432 | case 0: |
| 433 | /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ |
| 434 | /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ |
| 435 | if (len > 4) |
| 436 | len = 4; |
| 437 | memcpy(data, langids, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | return len; |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 439 | case 1: |
| 440 | /* Serial number */ |
| 441 | s = hcd->self.bus_name; |
| 442 | break; |
| 443 | case 2: |
| 444 | /* Product name */ |
| 445 | s = hcd->product_desc; |
| 446 | break; |
| 447 | case 3: |
| 448 | /* Manufacturer */ |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 449 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
| 450 | init_utsname()->release, hcd->driver->description); |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 451 | s = buf; |
| 452 | break; |
| 453 | default: |
| 454 | /* Can't happen; caller guarantees it */ |
| 455 | return 0; |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 456 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
George Spelvin | 392ca68 | 2009-08-24 22:06:41 -0400 | [diff] [blame] | 458 | return ascii2desc(s, data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | |
| 462 | /* Root hub control transfers execute synchronously */ |
| 463 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) |
| 464 | { |
| 465 | struct usb_ctrlrequest *cmd; |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 466 | u16 typeReq, wValue, wIndex, wLength; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | u8 *ubuf = urb->transfer_buffer; |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 468 | unsigned len = 0; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 469 | int status; |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 470 | u8 patch_wakeup = 0; |
| 471 | u8 patch_protocol = 0; |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 472 | u16 tbuf_size; |
| 473 | u8 *tbuf = NULL; |
| 474 | const u8 *bufp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 476 | might_sleep(); |
| 477 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 478 | spin_lock_irq(&hcd_root_hub_lock); |
| 479 | status = usb_hcd_link_urb_to_ep(hcd, urb); |
| 480 | spin_unlock_irq(&hcd_root_hub_lock); |
| 481 | if (status) |
| 482 | return status; |
Alan Stern | b0d9efb | 2007-08-21 15:39:21 -0400 | [diff] [blame] | 483 | urb->hcpriv = hcd; /* Indicate it's queued */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; |
| 486 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; |
| 487 | wValue = le16_to_cpu (cmd->wValue); |
| 488 | wIndex = le16_to_cpu (cmd->wIndex); |
| 489 | wLength = le16_to_cpu (cmd->wLength); |
| 490 | |
| 491 | if (wLength > urb->transfer_buffer_length) |
| 492 | goto error; |
| 493 | |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 494 | /* |
| 495 | * tbuf should be at least as big as the |
| 496 | * USB hub descriptor. |
| 497 | */ |
| 498 | tbuf_size = max_t(u16, sizeof(struct usb_hub_descriptor), wLength); |
| 499 | tbuf = kzalloc(tbuf_size, GFP_KERNEL); |
| 500 | if (!tbuf) |
| 501 | return -ENOMEM; |
| 502 | |
| 503 | bufp = tbuf; |
| 504 | |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | urb->actual_length = 0; |
| 507 | switch (typeReq) { |
| 508 | |
| 509 | /* DEVICE REQUESTS */ |
| 510 | |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 511 | /* The root hub's remote wakeup enable bit is implemented using |
| 512 | * driver model wakeup flags. If this system supports wakeup |
| 513 | * through USB, userspace may change the default "allow wakeup" |
| 514 | * policy through sysfs or these calls. |
| 515 | * |
| 516 | * Most root hubs support wakeup from downstream devices, for |
| 517 | * runtime power management (disabling USB clocks and reducing |
| 518 | * VBUS power usage). However, not all of them do so; silicon, |
| 519 | * board, and BIOS bugs here are not uncommon, so these can't |
| 520 | * be treated quite like external hubs. |
| 521 | * |
| 522 | * Likewise, not all root hubs will pass wakeup events upstream, |
| 523 | * to wake up the whole system. So don't assume root hub and |
| 524 | * controller capabilities are identical. |
| 525 | */ |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | case DeviceRequest | USB_REQ_GET_STATUS: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 528 | tbuf[0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 529 | << USB_DEVICE_REMOTE_WAKEUP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | | (1 << USB_DEVICE_SELF_POWERED); |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 531 | tbuf[1] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | len = 2; |
| 533 | break; |
| 534 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: |
| 535 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 536 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | else |
| 538 | goto error; |
| 539 | break; |
| 540 | case DeviceOutRequest | USB_REQ_SET_FEATURE: |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 541 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
| 542 | && wValue == USB_DEVICE_REMOTE_WAKEUP) |
| 543 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | else |
| 545 | goto error; |
| 546 | break; |
| 547 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 548 | tbuf[0] = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | len = 1; |
| 550 | /* FALLTHROUGH */ |
| 551 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: |
| 552 | break; |
| 553 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
| 554 | switch (wValue & 0xff00) { |
| 555 | case USB_DT_DEVICE << 8: |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 556 | switch (hcd->speed) { |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 557 | case HCD_USB3: |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 558 | bufp = usb3_rh_dev_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 559 | break; |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 560 | case HCD_USB25: |
| 561 | bufp = usb25_rh_dev_descriptor; |
| 562 | break; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 563 | case HCD_USB2: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | bufp = usb2_rh_dev_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 565 | break; |
| 566 | case HCD_USB11: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | bufp = usb11_rh_dev_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 568 | break; |
| 569 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | goto error; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 571 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | len = 18; |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 573 | if (hcd->has_tt) |
| 574 | patch_protocol = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | break; |
| 576 | case USB_DT_CONFIG << 8: |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 577 | switch (hcd->speed) { |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 578 | case HCD_USB3: |
Sarah Sharp | d2e9b4d | 2009-04-27 19:55:01 -0700 | [diff] [blame] | 579 | bufp = ss_rh_config_descriptor; |
| 580 | len = sizeof ss_rh_config_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 581 | break; |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 582 | case HCD_USB25: |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 583 | case HCD_USB2: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | bufp = hs_rh_config_descriptor; |
| 585 | len = sizeof hs_rh_config_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 586 | break; |
| 587 | case HCD_USB11: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | bufp = fs_rh_config_descriptor; |
| 589 | len = sizeof fs_rh_config_descriptor; |
Viral Mehta | 7dd19e6 | 2009-05-05 15:54:23 +0530 | [diff] [blame] | 590 | break; |
| 591 | default: |
| 592 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 594 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | patch_wakeup = 1; |
| 596 | break; |
| 597 | case USB_DT_STRING << 8: |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 598 | if ((wValue & 0xff) < 4) |
| 599 | urb->actual_length = rh_string(wValue & 0xff, |
| 600 | hcd, ubuf, wLength); |
| 601 | else /* unsupported IDs --> "protocol stall" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | break; |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 604 | case USB_DT_BOS << 8: |
| 605 | goto nongeneric; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | default: |
| 607 | goto error; |
| 608 | } |
| 609 | break; |
| 610 | case DeviceRequest | USB_REQ_GET_INTERFACE: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 611 | tbuf[0] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | len = 1; |
| 613 | /* FALLTHROUGH */ |
| 614 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: |
| 615 | break; |
| 616 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 617 | /* wValue == urb->dev->devaddr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | dev_dbg (hcd->self.controller, "root hub device address %d\n", |
| 619 | wValue); |
| 620 | break; |
| 621 | |
| 622 | /* INTERFACE REQUESTS (no defined feature/status flags) */ |
| 623 | |
| 624 | /* ENDPOINT REQUESTS */ |
| 625 | |
| 626 | case EndpointRequest | USB_REQ_GET_STATUS: |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 627 | /* ENDPOINT_HALT flag */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 628 | tbuf[0] = 0; |
| 629 | tbuf[1] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | len = 2; |
| 631 | /* FALLTHROUGH */ |
| 632 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: |
| 633 | case EndpointOutRequest | USB_REQ_SET_FEATURE: |
| 634 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); |
| 635 | break; |
| 636 | |
| 637 | /* CLASS REQUESTS (and errors) */ |
| 638 | |
| 639 | default: |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 640 | nongeneric: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | /* non-generic request */ |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 642 | switch (typeReq) { |
| 643 | case GetHubStatus: |
| 644 | case GetPortStatus: |
| 645 | len = 4; |
| 646 | break; |
| 647 | case GetHubDescriptor: |
| 648 | len = sizeof (struct usb_hub_descriptor); |
| 649 | break; |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 650 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
| 651 | /* len is returned by hub_control */ |
| 652 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | } |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 654 | status = hcd->driver->hub_control (hcd, |
| 655 | typeReq, wValue, wIndex, |
| 656 | tbuf, wLength); |
Lan Tianyu | d2123fd | 2013-01-21 22:18:00 +0800 | [diff] [blame] | 657 | |
| 658 | if (typeReq == GetHubDescriptor) |
| 659 | usb_hub_adjust_deviceremovable(hcd->self.root_hub, |
| 660 | (struct usb_hub_descriptor *)tbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | break; |
| 662 | error: |
| 663 | /* "protocol stall" on error */ |
| 664 | status = -EPIPE; |
| 665 | } |
| 666 | |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 667 | if (status < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | len = 0; |
| 669 | if (status != -EPIPE) { |
| 670 | dev_dbg (hcd->self.controller, |
| 671 | "CTRL: TypeReq=0x%x val=0x%x " |
| 672 | "idx=0x%x len=%d ==> %d\n", |
| 673 | typeReq, wValue, wIndex, |
David Brownell | b13296c | 2005-09-27 10:38:54 -0700 | [diff] [blame] | 674 | wLength, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | } |
Sarah Sharp | 48e8236 | 2011-10-06 11:54:23 -0700 | [diff] [blame] | 676 | } else if (status > 0) { |
| 677 | /* hub_control may return the length of data copied. */ |
| 678 | len = status; |
| 679 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | } |
| 681 | if (len) { |
| 682 | if (urb->transfer_buffer_length < len) |
| 683 | len = urb->transfer_buffer_length; |
| 684 | urb->actual_length = len; |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 685 | /* always USB_DIR_IN, toward host */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | memcpy (ubuf, bufp, len); |
| 687 | |
| 688 | /* report whether RH hardware supports remote wakeup */ |
| 689 | if (patch_wakeup && |
| 690 | len > offsetof (struct usb_config_descriptor, |
| 691 | bmAttributes)) |
| 692 | ((struct usb_config_descriptor *)ubuf)->bmAttributes |
| 693 | |= USB_CONFIG_ATT_WAKEUP; |
Alan Stern | 7329e21 | 2008-04-03 18:02:56 -0400 | [diff] [blame] | 694 | |
| 695 | /* report whether RH hardware has an integrated TT */ |
| 696 | if (patch_protocol && |
| 697 | len > offsetof(struct usb_device_descriptor, |
| 698 | bDeviceProtocol)) |
| 699 | ((struct usb_device_descriptor *) ubuf)-> |
Aman Deep | 7bf0118 | 2011-12-08 12:05:22 +0530 | [diff] [blame] | 700 | bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | } |
| 702 | |
Sean O. Stalley | e57e780 | 2013-08-13 10:36:12 -0700 | [diff] [blame] | 703 | kfree(tbuf); |
| 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | /* any errors get returned through the urb completion */ |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 706 | spin_lock_irq(&hcd_root_hub_lock); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 707 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 708 | usb_hcd_giveback_urb(hcd, urb, status); |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 709 | spin_unlock_irq(&hcd_root_hub_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | /*-------------------------------------------------------------------------*/ |
| 714 | |
| 715 | /* |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 716 | * Root Hub interrupt transfers are polled using a timer if the |
| 717 | * driver requests it; otherwise the driver is responsible for |
| 718 | * calling usb_hcd_poll_rh_status() when an event occurs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | * |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 720 | * Completions are called in_interrupt(), but they may or may not |
| 721 | * be in_irq(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | */ |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 723 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | { |
| 725 | struct urb *urb; |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 726 | int length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | unsigned long flags; |
Joe Perches | ad361c9 | 2009-07-06 13:05:40 -0700 | [diff] [blame] | 728 | char buffer[6]; /* Any root hubs with > 31 ports? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 730 | if (unlikely(!hcd->rh_pollable)) |
Alan Stern | 1b42ae6 | 2007-03-13 11:10:52 -0400 | [diff] [blame] | 731 | return; |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 732 | if (!hcd->uses_new_polling && !hcd->status_urb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 735 | length = hcd->driver->hub_status_data(hcd, buffer); |
| 736 | if (length > 0) { |
| 737 | |
| 738 | /* try to complete the status urb */ |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 739 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 740 | urb = hcd->status_urb; |
| 741 | if (urb) { |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 742 | clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 743 | hcd->status_urb = NULL; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 744 | urb->actual_length = length; |
| 745 | memcpy(urb->transfer_buffer, buffer, length); |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 746 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 747 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 748 | usb_hcd_giveback_urb(hcd, urb, 0); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 749 | } else { |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 750 | length = 0; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 751 | set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 752 | } |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 753 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 754 | } |
| 755 | |
| 756 | /* 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] | 757 | * exceed that limit if HZ is 100. The math is more clunky than |
| 758 | * 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] | 759 | * 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] | 760 | if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 761 | (length == 0 && hcd->status_urb != NULL)) |
Arjan van de Ven | 01cd081 | 2007-05-22 12:42:56 -0700 | [diff] [blame] | 762 | mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 763 | } |
| 764 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
| 765 | |
| 766 | /* timer callback */ |
| 767 | static void rh_timer_func (unsigned long _hcd) |
| 768 | { |
| 769 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | } |
| 771 | |
| 772 | /*-------------------------------------------------------------------------*/ |
| 773 | |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 774 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
| 775 | { |
| 776 | int retval; |
| 777 | unsigned long flags; |
Roel Kluin | 71d2718 | 2009-03-13 12:19:18 +0100 | [diff] [blame] | 778 | unsigned len = 1 + (urb->dev->maxchild / 8); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 779 | |
| 780 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 781 | if (hcd->status_urb || urb->transfer_buffer_length < len) { |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 782 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); |
| 783 | retval = -EINVAL; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 784 | goto done; |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 785 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 786 | |
| 787 | retval = usb_hcd_link_urb_to_ep(hcd, urb); |
| 788 | if (retval) |
| 789 | goto done; |
| 790 | |
| 791 | hcd->status_urb = urb; |
| 792 | urb->hcpriv = hcd; /* indicate it's queued */ |
| 793 | if (!hcd->uses_new_polling) |
| 794 | mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
| 795 | |
| 796 | /* If a status change has already occurred, report it ASAP */ |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 797 | else if (HCD_POLL_PENDING(hcd)) |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 798 | mod_timer(&hcd->rh_timer, jiffies); |
| 799 | retval = 0; |
| 800 | done: |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 801 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
| 802 | return retval; |
| 803 | } |
| 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
| 806 | { |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 807 | if (usb_endpoint_xfer_int(&urb->ep->desc)) |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 808 | return rh_queue_status (hcd, urb); |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 809 | if (usb_endpoint_xfer_control(&urb->ep->desc)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | return rh_call_control (hcd, urb); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 811 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | /*-------------------------------------------------------------------------*/ |
| 815 | |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 816 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
| 817 | * since these URBs always execute synchronously. |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 818 | */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 819 | 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] | 820 | { |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 821 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 822 | int rc; |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 823 | |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 824 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 825 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 826 | if (rc) |
| 827 | goto done; |
| 828 | |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 829 | if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 830 | ; /* Do nothing */ |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 831 | |
| 832 | } else { /* Status URB */ |
| 833 | if (!hcd->uses_new_polling) |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 834 | del_timer (&hcd->rh_timer); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 835 | if (urb == hcd->status_urb) { |
| 836 | hcd->status_urb = NULL; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 837 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 838 | usb_hcd_giveback_urb(hcd, urb, status); |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 839 | } |
| 840 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 841 | done: |
Alan Stern | 9439eb9 | 2007-08-02 15:05:45 -0400 | [diff] [blame] | 842 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 843 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | } |
| 845 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 846 | |
| 847 | |
| 848 | /* |
| 849 | * Show & store the current value of authorized_default |
| 850 | */ |
Greg Kroah-Hartman | d03f254 | 2013-08-23 16:05:26 -0700 | [diff] [blame] | 851 | static ssize_t authorized_default_show(struct device *dev, |
| 852 | struct device_attribute *attr, char *buf) |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 853 | { |
| 854 | struct usb_device *rh_usb_dev = to_usb_device(dev); |
| 855 | struct usb_bus *usb_bus = rh_usb_dev->bus; |
| 856 | struct usb_hcd *usb_hcd; |
| 857 | |
| 858 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ |
| 859 | return -ENODEV; |
| 860 | usb_hcd = bus_to_hcd(usb_bus); |
| 861 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); |
| 862 | } |
| 863 | |
Greg Kroah-Hartman | d03f254 | 2013-08-23 16:05:26 -0700 | [diff] [blame] | 864 | static ssize_t authorized_default_store(struct device *dev, |
| 865 | struct device_attribute *attr, |
| 866 | const char *buf, size_t size) |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 867 | { |
| 868 | ssize_t result; |
| 869 | unsigned val; |
| 870 | struct usb_device *rh_usb_dev = to_usb_device(dev); |
| 871 | struct usb_bus *usb_bus = rh_usb_dev->bus; |
| 872 | struct usb_hcd *usb_hcd; |
| 873 | |
| 874 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ |
| 875 | return -ENODEV; |
| 876 | usb_hcd = bus_to_hcd(usb_bus); |
| 877 | result = sscanf(buf, "%u\n", &val); |
| 878 | if (result == 1) { |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 879 | usb_hcd->authorized_default = val ? 1 : 0; |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 880 | result = size; |
Matthias Beyer | d1ddb0a | 2013-10-05 18:02:10 +0200 | [diff] [blame] | 881 | } else { |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 882 | result = -EINVAL; |
Matthias Beyer | d1ddb0a | 2013-10-05 18:02:10 +0200 | [diff] [blame] | 883 | } |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 884 | return result; |
| 885 | } |
Greg Kroah-Hartman | d03f254 | 2013-08-23 16:05:26 -0700 | [diff] [blame] | 886 | static DEVICE_ATTR_RW(authorized_default); |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 887 | |
| 888 | /* Group all the USB bus attributes */ |
| 889 | static struct attribute *usb_bus_attrs[] = { |
| 890 | &dev_attr_authorized_default.attr, |
| 891 | NULL, |
| 892 | }; |
| 893 | |
| 894 | static struct attribute_group usb_bus_attr_group = { |
| 895 | .name = NULL, /* we want them in the same directory */ |
| 896 | .attrs = usb_bus_attrs, |
| 897 | }; |
| 898 | |
| 899 | |
| 900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | /*-------------------------------------------------------------------------*/ |
| 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | /** |
| 904 | * usb_bus_init - shared initialization code |
| 905 | * @bus: the bus structure being initialized |
| 906 | * |
| 907 | * This code is used to initialize a usb_bus structure, memory for which is |
| 908 | * separately managed. |
| 909 | */ |
| 910 | static void usb_bus_init (struct usb_bus *bus) |
| 911 | { |
| 912 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); |
| 913 | |
| 914 | bus->devnum_next = 1; |
| 915 | |
| 916 | bus->root_hub = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | bus->busnum = -1; |
| 918 | bus->bandwidth_allocated = 0; |
| 919 | bus->bandwidth_int_reqs = 0; |
| 920 | bus->bandwidth_isoc_reqs = 0; |
Todd E Brandt | 6fecd4f | 2014-05-19 10:55:32 -0700 | [diff] [blame] | 921 | mutex_init(&bus->usb_address0_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | |
| 923 | INIT_LIST_HEAD (&bus->bus_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | } |
| 925 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | /*-------------------------------------------------------------------------*/ |
| 927 | |
| 928 | /** |
| 929 | * usb_register_bus - registers the USB host controller with the usb core |
| 930 | * @bus: pointer to the bus to register |
| 931 | * Context: !in_interrupt() |
| 932 | * |
| 933 | * Assigns a bus number, and links the controller into usbcore data |
| 934 | * structures so that it can be seen by scanning the bus list. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 935 | * |
| 936 | * Return: 0 if successful. A negative error code otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | */ |
| 938 | static int usb_register_bus(struct usb_bus *bus) |
| 939 | { |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 940 | int result = -E2BIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | int busnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 943 | mutex_lock(&usb_bus_list_lock); |
Matthias Beyer | 059239a | 2013-10-05 23:09:15 +0200 | [diff] [blame] | 944 | busnum = find_next_zero_bit(busmap, USB_MAXBUS, 1); |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 945 | if (busnum >= USB_MAXBUS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | printk (KERN_ERR "%s: too many buses\n", usbcore_name); |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 947 | goto error_find_busnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | } |
Matthias Beyer | 059239a | 2013-10-05 23:09:15 +0200 | [diff] [blame] | 949 | set_bit(busnum, busmap); |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 950 | bus->busnum = busnum; |
Tony Jones | 5a3201b | 2007-09-11 14:07:31 -0700 | [diff] [blame] | 951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | /* Add it to the local list of buses */ |
| 953 | list_add (&bus->bus_list, &usb_bus_list); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 954 | mutex_unlock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | |
Greg Kroah-Hartman | 3099e75 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 956 | usb_notify_add_bus(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 958 | dev_info (bus->controller, "new USB bus registered, assigned bus " |
| 959 | "number %d\n", bus->busnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | return 0; |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 961 | |
Inaky Perez-Gonzalez | eb579f5 | 2007-07-31 20:33:59 -0700 | [diff] [blame] | 962 | error_find_busnum: |
| 963 | mutex_unlock(&usb_bus_list_lock); |
| 964 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | /** |
| 968 | * usb_deregister_bus - deregisters the USB host controller |
| 969 | * @bus: pointer to the bus to deregister |
| 970 | * Context: !in_interrupt() |
| 971 | * |
| 972 | * Recycles the bus number, and unlinks the controller from usbcore data |
| 973 | * structures so that it won't be seen by scanning the bus list. |
| 974 | */ |
| 975 | static void usb_deregister_bus (struct usb_bus *bus) |
| 976 | { |
| 977 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); |
| 978 | |
| 979 | /* |
| 980 | * NOTE: make sure that all the devices are removed by the |
| 981 | * controller code, as well as having it call this when cleaning |
| 982 | * itself up |
| 983 | */ |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 984 | mutex_lock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | list_del (&bus->bus_list); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 986 | mutex_unlock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
Greg Kroah-Hartman | 3099e75 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 988 | usb_notify_remove_bus(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | |
Matthias Beyer | 059239a | 2013-10-05 23:09:15 +0200 | [diff] [blame] | 990 | clear_bit(bus->busnum, busmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | /** |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 994 | * 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] | 995 | * @hcd: host controller for this root hub |
| 996 | * |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 997 | * 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] | 998 | * the device properly in the device tree and then calls usb_new_device() |
| 999 | * to register the usb device. It also assigns the root hub's USB address |
| 1000 | * (always 1). |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1001 | * |
| 1002 | * Return: 0 if successful. A negative error code otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | */ |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 1004 | static int register_root_hub(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | { |
| 1006 | struct device *parent_dev = hcd->self.controller; |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 1007 | struct usb_device *usb_dev = hcd->self.root_hub; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | const int devnum = 1; |
| 1009 | int retval; |
| 1010 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | usb_dev->devnum = devnum; |
| 1012 | usb_dev->bus->devnum_next = devnum + 1; |
| 1013 | memset (&usb_dev->bus->devmap.devicemap, 0, |
| 1014 | sizeof usb_dev->bus->devmap.devicemap); |
| 1015 | set_bit (devnum, usb_dev->bus->devmap.devicemap); |
| 1016 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); |
| 1017 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1018 | mutex_lock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 1020 | usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); |
| 1022 | if (retval != sizeof usb_dev->descriptor) { |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 1023 | mutex_unlock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1025 | dev_name(&usb_dev->dev), retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | return (retval < 0) ? retval : -EMSGSIZE; |
| 1027 | } |
Sarah Sharp | 448b6eb | 2012-05-15 16:58:45 -0700 | [diff] [blame] | 1028 | if (usb_dev->speed == USB_SPEED_SUPER) { |
| 1029 | retval = usb_get_bos_descriptor(usb_dev); |
| 1030 | if (retval < 0) { |
| 1031 | mutex_unlock(&usb_bus_list_lock); |
| 1032 | dev_dbg(parent_dev, "can't read %s bos descriptor %d\n", |
| 1033 | dev_name(&usb_dev->dev), retval); |
| 1034 | return retval; |
| 1035 | } |
| 1036 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | retval = usb_new_device (usb_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | if (retval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | 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] | 1041 | dev_name(&usb_dev->dev), retval); |
Alan Stern | 0a23140 | 2012-09-26 13:09:53 -0400 | [diff] [blame] | 1042 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | spin_lock_irq (&hcd_root_hub_lock); |
| 1044 | hcd->rh_registered = 1; |
| 1045 | spin_unlock_irq (&hcd_root_hub_lock); |
| 1046 | |
| 1047 | /* Did the HC die before the root hub was registered? */ |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 1048 | if (HCD_DEAD(hcd)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | usb_hc_died (hcd); /* This time clean up */ |
| 1050 | } |
Alan Stern | 0a23140 | 2012-09-26 13:09:53 -0400 | [diff] [blame] | 1051 | mutex_unlock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | |
| 1053 | return retval; |
| 1054 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
Alan Stern | da0aa71 | 2013-01-25 17:09:42 -0500 | [diff] [blame] | 1056 | /* |
| 1057 | * usb_hcd_start_port_resume - a root-hub port is sending a resume signal |
| 1058 | * @bus: the bus which the root hub belongs to |
| 1059 | * @portnum: the port which is being resumed |
| 1060 | * |
| 1061 | * HCDs should call this function when they know that a resume signal is |
| 1062 | * being sent to a root-hub port. The root hub will be prevented from |
| 1063 | * going into autosuspend until usb_hcd_end_port_resume() is called. |
| 1064 | * |
| 1065 | * The bus's private lock must be held by the caller. |
| 1066 | */ |
| 1067 | void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum) |
| 1068 | { |
| 1069 | unsigned bit = 1 << portnum; |
| 1070 | |
| 1071 | if (!(bus->resuming_ports & bit)) { |
| 1072 | bus->resuming_ports |= bit; |
| 1073 | pm_runtime_get_noresume(&bus->root_hub->dev); |
| 1074 | } |
| 1075 | } |
| 1076 | EXPORT_SYMBOL_GPL(usb_hcd_start_port_resume); |
| 1077 | |
| 1078 | /* |
| 1079 | * usb_hcd_end_port_resume - a root-hub port has stopped sending a resume signal |
| 1080 | * @bus: the bus which the root hub belongs to |
| 1081 | * @portnum: the port which is being resumed |
| 1082 | * |
| 1083 | * HCDs should call this function when they know that a resume signal has |
| 1084 | * stopped being sent to a root-hub port. The root hub will be allowed to |
| 1085 | * autosuspend again. |
| 1086 | * |
| 1087 | * The bus's private lock must be held by the caller. |
| 1088 | */ |
| 1089 | void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum) |
| 1090 | { |
| 1091 | unsigned bit = 1 << portnum; |
| 1092 | |
| 1093 | if (bus->resuming_ports & bit) { |
| 1094 | bus->resuming_ports &= ~bit; |
| 1095 | pm_runtime_put_noidle(&bus->root_hub->dev); |
| 1096 | } |
| 1097 | } |
| 1098 | EXPORT_SYMBOL_GPL(usb_hcd_end_port_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
| 1100 | /*-------------------------------------------------------------------------*/ |
| 1101 | |
| 1102 | /** |
| 1103 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds |
| 1104 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} |
| 1105 | * @is_input: true iff the transaction sends data to the host |
| 1106 | * @isoc: true for isochronous transactions, false for interrupt ones |
| 1107 | * @bytecount: how many bytes in the transaction. |
| 1108 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1109 | * Return: Approximate bus time in nanoseconds for a periodic transaction. |
| 1110 | * |
| 1111 | * Note: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be |
| 1113 | * scheduled in software, this function is only used for such scheduling. |
| 1114 | */ |
| 1115 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) |
| 1116 | { |
| 1117 | unsigned long tmp; |
| 1118 | |
| 1119 | switch (speed) { |
| 1120 | case USB_SPEED_LOW: /* INTR only */ |
| 1121 | if (is_input) { |
| 1122 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1123 | return 64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | } else { |
| 1125 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1126 | return 64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | case USB_SPEED_FULL: /* ISOC or INTR */ |
| 1129 | if (isoc) { |
| 1130 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1131 | return ((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | } else { |
| 1133 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; |
Matthias Beyer | 0701049 | 2013-10-05 18:02:09 +0200 | [diff] [blame] | 1134 | return 9107L + BW_HOST_DELAY + tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | } |
| 1136 | case USB_SPEED_HIGH: /* ISOC or INTR */ |
Matthias Beyer | 048cb21 | 2013-10-05 18:02:08 +0200 | [diff] [blame] | 1137 | /* FIXME adjust for input vs output */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | if (isoc) |
Dan Streetman | 498f78e | 2005-07-29 12:18:28 -0700 | [diff] [blame] | 1139 | tmp = HS_NSECS_ISO (bytecount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | else |
Dan Streetman | 498f78e | 2005-07-29 12:18:28 -0700 | [diff] [blame] | 1141 | tmp = HS_NSECS (bytecount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | return tmp; |
| 1143 | default: |
| 1144 | pr_debug ("%s: bogus device speed!\n", usbcore_name); |
| 1145 | return -1; |
| 1146 | } |
| 1147 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 1148 | EXPORT_SYMBOL_GPL(usb_calc_bus_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | |
| 1151 | /*-------------------------------------------------------------------------*/ |
| 1152 | |
| 1153 | /* |
| 1154 | * Generic HC operations. |
| 1155 | */ |
| 1156 | |
| 1157 | /*-------------------------------------------------------------------------*/ |
| 1158 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1159 | /** |
| 1160 | * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue |
| 1161 | * @hcd: host controller to which @urb was submitted |
| 1162 | * @urb: URB being submitted |
| 1163 | * |
| 1164 | * Host controller drivers should call this routine in their enqueue() |
| 1165 | * method. The HCD's private spinlock must be held and interrupts must |
| 1166 | * be disabled. The actions carried out here are required for URB |
| 1167 | * submission, as well as for endpoint shutdown and for usb_kill_urb. |
| 1168 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1169 | * 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] | 1170 | * the enqueue() method must fail). If no error occurs but enqueue() fails |
| 1171 | * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing |
| 1172 | * the private spinlock and returning. |
| 1173 | */ |
| 1174 | 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] | 1175 | { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1176 | int rc = 0; |
| 1177 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1178 | spin_lock(&hcd_urb_list_lock); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1179 | |
| 1180 | /* Check that the URB isn't being killed */ |
Ming Lei | 49367d8 | 2008-12-12 21:38:45 +0800 | [diff] [blame] | 1181 | if (unlikely(atomic_read(&urb->reject))) { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1182 | rc = -EPERM; |
| 1183 | goto done; |
| 1184 | } |
| 1185 | |
| 1186 | if (unlikely(!urb->ep->enabled)) { |
| 1187 | rc = -ENOENT; |
| 1188 | goto done; |
| 1189 | } |
| 1190 | |
Alan Stern | 6840d25 | 2007-09-10 11:34:26 -0400 | [diff] [blame] | 1191 | if (unlikely(!urb->dev->can_submit)) { |
| 1192 | rc = -EHOSTUNREACH; |
| 1193 | goto done; |
| 1194 | } |
| 1195 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1196 | /* |
| 1197 | * Check the host controller's state and add the URB to the |
| 1198 | * endpoint's queue. |
| 1199 | */ |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 1200 | if (HCD_RH_RUNNING(hcd)) { |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1201 | urb->unlinked = 0; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1202 | list_add_tail(&urb->urb_list, &urb->ep->urb_list); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 1203 | } else { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1204 | rc = -ESHUTDOWN; |
| 1205 | goto done; |
| 1206 | } |
| 1207 | done: |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1208 | spin_unlock(&hcd_urb_list_lock); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1209 | return rc; |
| 1210 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1211 | EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1212 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1213 | /** |
| 1214 | * usb_hcd_check_unlink_urb - check whether an URB may be unlinked |
| 1215 | * @hcd: host controller to which @urb was submitted |
| 1216 | * @urb: URB being checked for unlinkability |
| 1217 | * @status: error code to store in @urb if the unlink succeeds |
| 1218 | * |
| 1219 | * Host controller drivers should call this routine in their dequeue() |
| 1220 | * method. The HCD's private spinlock must be held and interrupts must |
| 1221 | * be disabled. The actions carried out here are required for making |
| 1222 | * sure than an unlink is valid. |
| 1223 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1224 | * 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] | 1225 | * the dequeue() method must fail). The possible error codes are: |
| 1226 | * |
| 1227 | * -EIDRM: @urb was not submitted or has already completed. |
| 1228 | * The completion function may not have been called yet. |
| 1229 | * |
| 1230 | * -EBUSY: @urb has already been unlinked. |
| 1231 | */ |
| 1232 | 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] | 1233 | int status) |
| 1234 | { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1235 | struct list_head *tmp; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1236 | |
| 1237 | /* insist the urb is still queued */ |
| 1238 | list_for_each(tmp, &urb->ep->urb_list) { |
| 1239 | if (tmp == &urb->urb_list) |
| 1240 | break; |
| 1241 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1242 | if (tmp != &urb->urb_list) |
| 1243 | return -EIDRM; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1244 | |
| 1245 | /* Any status except -EINPROGRESS means something already started to |
| 1246 | * unlink this URB from the hardware. So there's no more work to do. |
| 1247 | */ |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1248 | if (urb->unlinked) |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1249 | return -EBUSY; |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1250 | urb->unlinked = status; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1251 | return 0; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1252 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1253 | EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1254 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1255 | /** |
| 1256 | * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue |
| 1257 | * @hcd: host controller to which @urb was submitted |
| 1258 | * @urb: URB being unlinked |
| 1259 | * |
| 1260 | * Host controller drivers should call this routine before calling |
| 1261 | * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and |
| 1262 | * interrupts must be disabled. The actions carried out here are required |
| 1263 | * for URB completion. |
| 1264 | */ |
| 1265 | 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] | 1266 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | /* clear all state linking urb to this dev (and hcd) */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1268 | spin_lock(&hcd_urb_list_lock); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1269 | list_del_init(&urb->urb_list); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1270 | spin_unlock(&hcd_urb_list_lock); |
Pete Zaitcev | 9f6a93f | 2007-06-08 13:37:49 -0700 | [diff] [blame] | 1271 | } |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1272 | EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1274 | /* |
| 1275 | * Some usb host controllers can only perform dma using a small SRAM area. |
| 1276 | * The usb core itself is however optimized for host controllers that can dma |
| 1277 | * using regular system memory - like pci devices doing bus mastering. |
| 1278 | * |
| 1279 | * To support host controllers with limited dma capabilites we provide dma |
| 1280 | * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. |
| 1281 | * For this to work properly the host controller code must first use the |
| 1282 | * function dma_declare_coherent_memory() to point out which memory area |
| 1283 | * that should be used for dma allocations. |
| 1284 | * |
| 1285 | * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for |
| 1286 | * dma using dma_alloc_coherent() which in turn allocates from the memory |
| 1287 | * area pointed out with dma_declare_coherent_memory(). |
| 1288 | * |
| 1289 | * So, to summarize... |
| 1290 | * |
| 1291 | * - We need "local" memory, canonical example being |
| 1292 | * a small SRAM on a discrete controller being the |
| 1293 | * only memory that the controller can read ... |
| 1294 | * (a) "normal" kernel memory is no good, and |
| 1295 | * (b) there's not enough to share |
| 1296 | * |
| 1297 | * - The only *portable* hook for such stuff in the |
| 1298 | * DMA framework is dma_declare_coherent_memory() |
| 1299 | * |
| 1300 | * - So we use that, even though the primary requirement |
Rahul Bedarkar | 025d443 | 2014-01-04 11:24:41 +0530 | [diff] [blame] | 1301 | * is that the memory be "local" (hence addressable |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1302 | * by that device), not "coherent". |
| 1303 | * |
| 1304 | */ |
| 1305 | |
| 1306 | static int hcd_alloc_coherent(struct usb_bus *bus, |
| 1307 | gfp_t mem_flags, dma_addr_t *dma_handle, |
| 1308 | void **vaddr_handle, size_t size, |
| 1309 | enum dma_data_direction dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1311 | unsigned char *vaddr; |
| 1312 | |
Andrea Righi | 4307a28 | 2010-06-28 16:56:45 +0200 | [diff] [blame] | 1313 | if (*vaddr_handle == NULL) { |
| 1314 | WARN_ON_ONCE(1); |
| 1315 | return -EFAULT; |
| 1316 | } |
| 1317 | |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1318 | vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), |
| 1319 | mem_flags, dma_handle); |
| 1320 | if (!vaddr) |
| 1321 | return -ENOMEM; |
| 1322 | |
| 1323 | /* |
| 1324 | * Store the virtual address of the buffer at the end |
| 1325 | * of the allocated dma buffer. The size of the buffer |
| 1326 | * may be uneven so use unaligned functions instead |
| 1327 | * of just rounding up. It makes sense to optimize for |
| 1328 | * memory footprint over access speed since the amount |
| 1329 | * of memory available for dma may be limited. |
| 1330 | */ |
| 1331 | put_unaligned((unsigned long)*vaddr_handle, |
| 1332 | (unsigned long *)(vaddr + size)); |
| 1333 | |
| 1334 | if (dir == DMA_TO_DEVICE) |
| 1335 | memcpy(vaddr, *vaddr_handle, size); |
| 1336 | |
| 1337 | *vaddr_handle = vaddr; |
| 1338 | return 0; |
| 1339 | } |
| 1340 | |
| 1341 | static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, |
| 1342 | void **vaddr_handle, size_t size, |
| 1343 | enum dma_data_direction dir) |
| 1344 | { |
| 1345 | unsigned char *vaddr = *vaddr_handle; |
| 1346 | |
| 1347 | vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); |
| 1348 | |
| 1349 | if (dir == DMA_FROM_DEVICE) |
| 1350 | memcpy(vaddr, *vaddr_handle, size); |
| 1351 | |
| 1352 | hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); |
| 1353 | |
| 1354 | *vaddr_handle = vaddr; |
| 1355 | *dma_handle = 0; |
| 1356 | } |
| 1357 | |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1358 | 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] | 1359 | { |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1360 | if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) |
| 1361 | dma_unmap_single(hcd->self.controller, |
| 1362 | urb->setup_dma, |
| 1363 | sizeof(struct usb_ctrlrequest), |
| 1364 | DMA_TO_DEVICE); |
| 1365 | else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) |
| 1366 | hcd_free_coherent(urb->dev->bus, |
| 1367 | &urb->setup_dma, |
| 1368 | (void **) &urb->setup_packet, |
| 1369 | sizeof(struct usb_ctrlrequest), |
| 1370 | DMA_TO_DEVICE); |
| 1371 | |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1372 | /* Make it safe to call this routine more than once */ |
| 1373 | urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); |
| 1374 | } |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1375 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1376 | |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1377 | static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
| 1378 | { |
| 1379 | if (hcd->driver->unmap_urb_for_dma) |
| 1380 | hcd->driver->unmap_urb_for_dma(hcd, urb); |
| 1381 | else |
| 1382 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
| 1383 | } |
| 1384 | |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1385 | 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] | 1386 | { |
| 1387 | enum dma_data_direction dir; |
| 1388 | |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1389 | usb_hcd_unmap_urb_setup_for_dma(hcd, urb); |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1390 | |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1391 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
| 1392 | if (urb->transfer_flags & URB_DMA_MAP_SG) |
| 1393 | dma_unmap_sg(hcd->self.controller, |
Matthew Wilcox | 910f8d0 | 2010-05-01 12:20:01 -0600 | [diff] [blame] | 1394 | urb->sg, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1395 | urb->num_sgs, |
| 1396 | dir); |
| 1397 | else if (urb->transfer_flags & URB_DMA_MAP_PAGE) |
| 1398 | dma_unmap_page(hcd->self.controller, |
| 1399 | urb->transfer_dma, |
| 1400 | urb->transfer_buffer_length, |
| 1401 | dir); |
| 1402 | else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) |
| 1403 | dma_unmap_single(hcd->self.controller, |
| 1404 | urb->transfer_dma, |
| 1405 | urb->transfer_buffer_length, |
| 1406 | dir); |
| 1407 | else if (urb->transfer_flags & URB_MAP_LOCAL) |
| 1408 | hcd_free_coherent(urb->dev->bus, |
| 1409 | &urb->transfer_dma, |
| 1410 | &urb->transfer_buffer, |
| 1411 | urb->transfer_buffer_length, |
| 1412 | dir); |
| 1413 | |
| 1414 | /* Make it safe to call this routine more than once */ |
Martin Fuzzey | 1dae423 | 2010-10-01 00:21:55 +0200 | [diff] [blame] | 1415 | urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1416 | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); |
| 1417 | } |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1418 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1419 | |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1420 | static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
| 1421 | gfp_t mem_flags) |
| 1422 | { |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1423 | if (hcd->driver->map_urb_for_dma) |
| 1424 | return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); |
| 1425 | else |
| 1426 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); |
| 1427 | } |
| 1428 | |
| 1429 | int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
| 1430 | gfp_t mem_flags) |
| 1431 | { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1432 | enum dma_data_direction dir; |
| 1433 | int ret = 0; |
| 1434 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1435 | /* Map the URB's buffers for DMA access. |
| 1436 | * Lower level HCD code should use *_dma exclusively, |
Sarah Sharp | e04748e | 2009-04-27 19:59:01 -0700 | [diff] [blame] | 1437 | * unless it uses pio or talks to another transport, |
| 1438 | * or uses the provided scatter gather list for bulk. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | */ |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1440 | |
Alan Stern | 85bcb5e | 2010-04-30 16:35:37 -0400 | [diff] [blame] | 1441 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
Anand Gadiyar | 07a8cdd | 2010-11-18 18:54:17 +0530 | [diff] [blame] | 1442 | if (hcd->self.uses_pio_for_control) |
| 1443 | return ret; |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1444 | if (hcd->self.uses_dma) { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1445 | urb->setup_dma = dma_map_single( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | hcd->self.controller, |
| 1447 | urb->setup_packet, |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1448 | sizeof(struct usb_ctrlrequest), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | DMA_TO_DEVICE); |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1450 | if (dma_mapping_error(hcd->self.controller, |
| 1451 | urb->setup_dma)) |
| 1452 | return -EAGAIN; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1453 | urb->transfer_flags |= URB_SETUP_MAP_SINGLE; |
Ming Lei | f537da6 | 2010-05-12 23:38:12 +0800 | [diff] [blame] | 1454 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1455 | ret = hcd_alloc_coherent( |
| 1456 | urb->dev->bus, mem_flags, |
| 1457 | &urb->setup_dma, |
| 1458 | (void **)&urb->setup_packet, |
| 1459 | sizeof(struct usb_ctrlrequest), |
| 1460 | DMA_TO_DEVICE); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1461 | if (ret) |
| 1462 | return ret; |
| 1463 | urb->transfer_flags |= URB_SETUP_MAP_LOCAL; |
Ming Lei | f537da6 | 2010-05-12 23:38:12 +0800 | [diff] [blame] | 1464 | } |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1465 | } |
| 1466 | |
| 1467 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1468 | if (urb->transfer_buffer_length != 0 |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1469 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1470 | if (hcd->self.uses_dma) { |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1471 | if (urb->num_sgs) { |
Hans de Goede | fe2072c | 2012-07-09 15:57:00 +0200 | [diff] [blame] | 1472 | int n; |
| 1473 | |
| 1474 | /* We don't support sg for isoc transfers ! */ |
| 1475 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
| 1476 | WARN_ON(1); |
| 1477 | return -EINVAL; |
| 1478 | } |
| 1479 | |
| 1480 | n = dma_map_sg( |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1481 | hcd->self.controller, |
Matthew Wilcox | 910f8d0 | 2010-05-01 12:20:01 -0600 | [diff] [blame] | 1482 | urb->sg, |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1483 | urb->num_sgs, |
| 1484 | dir); |
| 1485 | if (n <= 0) |
| 1486 | ret = -EAGAIN; |
| 1487 | else |
| 1488 | urb->transfer_flags |= URB_DMA_MAP_SG; |
Clemens Ladisch | bc677d5 | 2011-12-03 23:41:31 +0100 | [diff] [blame] | 1489 | urb->num_mapped_sgs = n; |
| 1490 | if (n != urb->num_sgs) |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1491 | urb->transfer_flags |= |
| 1492 | URB_DMA_SG_COMBINED; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1493 | } else if (urb->sg) { |
Matthew Wilcox | 910f8d0 | 2010-05-01 12:20:01 -0600 | [diff] [blame] | 1494 | struct scatterlist *sg = urb->sg; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1495 | urb->transfer_dma = dma_map_page( |
| 1496 | hcd->self.controller, |
| 1497 | sg_page(sg), |
| 1498 | sg->offset, |
| 1499 | urb->transfer_buffer_length, |
| 1500 | dir); |
| 1501 | if (dma_mapping_error(hcd->self.controller, |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1502 | urb->transfer_dma)) |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1503 | ret = -EAGAIN; |
| 1504 | else |
| 1505 | urb->transfer_flags |= URB_DMA_MAP_PAGE; |
Dan Williams | 29d2fef | 2014-05-08 19:25:56 +0300 | [diff] [blame] | 1506 | } else if (is_vmalloc_addr(urb->transfer_buffer)) { |
| 1507 | WARN_ONCE(1, "transfer buffer not dma capable\n"); |
| 1508 | ret = -EAGAIN; |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1509 | } else { |
| 1510 | urb->transfer_dma = dma_map_single( |
| 1511 | hcd->self.controller, |
| 1512 | urb->transfer_buffer, |
| 1513 | urb->transfer_buffer_length, |
| 1514 | dir); |
| 1515 | if (dma_mapping_error(hcd->self.controller, |
| 1516 | urb->transfer_dma)) |
| 1517 | ret = -EAGAIN; |
| 1518 | else |
| 1519 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; |
| 1520 | } |
Larry Finger | 85e034f | 2009-11-05 10:37:03 -0600 | [diff] [blame] | 1521 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1522 | ret = hcd_alloc_coherent( |
| 1523 | urb->dev->bus, mem_flags, |
| 1524 | &urb->transfer_dma, |
| 1525 | &urb->transfer_buffer, |
| 1526 | urb->transfer_buffer_length, |
| 1527 | dir); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1528 | if (ret == 0) |
| 1529 | urb->transfer_flags |= URB_MAP_LOCAL; |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1530 | } |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1531 | if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | |
| 1532 | URB_SETUP_MAP_LOCAL))) |
Robert Morell | c8cf203 | 2011-01-26 19:06:47 -0800 | [diff] [blame] | 1533 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | } |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1535 | return ret; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1536 | } |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1537 | EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1539 | /*-------------------------------------------------------------------------*/ |
| 1540 | |
| 1541 | /* may be called in any context with a valid urb->dev usecount |
| 1542 | * caller surrenders "ownership" of urb |
| 1543 | * expects usb_submit_urb() to have sanity checked and conditioned all |
| 1544 | * inputs in the urb |
| 1545 | */ |
| 1546 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) |
| 1547 | { |
| 1548 | int status; |
| 1549 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); |
| 1550 | |
| 1551 | /* increment urb's reference count as part of giving it to the HCD |
| 1552 | * (which will control it). HCD guarantees that it either returns |
| 1553 | * an error or calls giveback(), but not both. |
| 1554 | */ |
| 1555 | usb_get_urb(urb); |
| 1556 | atomic_inc(&urb->use_count); |
Sarah Sharp | 4d59d8a | 2007-10-03 14:56:03 -0700 | [diff] [blame] | 1557 | atomic_inc(&urb->dev->urbnum); |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1558 | usbmon_urb_submit(&hcd->self, urb); |
| 1559 | |
| 1560 | /* NOTE requirements on root-hub callers (usbfs and the hub |
| 1561 | * driver, for now): URBs' urb->transfer_buffer must be |
| 1562 | * valid and usb_buffer_{sync,unmap}() not be needed, since |
| 1563 | * they could clobber root hub response data. Also, control |
| 1564 | * URBs must be submitted in process context with interrupts |
| 1565 | * enabled. |
| 1566 | */ |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1567 | |
| 1568 | if (is_root_hub(urb->dev)) { |
| 1569 | status = rh_urb_enqueue(hcd, urb); |
| 1570 | } else { |
| 1571 | status = map_urb_for_dma(hcd, urb, mem_flags); |
| 1572 | if (likely(status == 0)) { |
| 1573 | status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); |
| 1574 | if (unlikely(status)) |
Robert Morell | 2694a48 | 2011-01-26 19:06:48 -0800 | [diff] [blame] | 1575 | unmap_urb_for_dma(hcd, urb); |
Alan Stern | ff9c895 | 2010-04-02 13:27:28 -0400 | [diff] [blame] | 1576 | } |
Magnus Damm | b347667 | 2008-01-23 15:58:35 +0900 | [diff] [blame] | 1577 | } |
| 1578 | |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1579 | if (unlikely(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | usbmon_urb_submit_error(&hcd->self, urb, status); |
Alan Stern | b0d9efb | 2007-08-21 15:39:21 -0400 | [diff] [blame] | 1581 | urb->hcpriv = NULL; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1582 | INIT_LIST_HEAD(&urb->urb_list); |
| 1583 | atomic_dec(&urb->use_count); |
Sarah Sharp | 4d59d8a | 2007-10-03 14:56:03 -0700 | [diff] [blame] | 1584 | atomic_dec(&urb->dev->urbnum); |
Ming Lei | 49367d8 | 2008-12-12 21:38:45 +0800 | [diff] [blame] | 1585 | if (atomic_read(&urb->reject)) |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1586 | wake_up(&usb_kill_urb_queue); |
| 1587 | usb_put_urb(urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | } |
| 1589 | return status; |
| 1590 | } |
| 1591 | |
| 1592 | /*-------------------------------------------------------------------------*/ |
| 1593 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | /* this makes the hcd giveback() the urb more quickly, by kicking it |
| 1595 | * off hardware queues (which may take a while) and returning it as |
| 1596 | * soon as practical. we've already set up the urb's return status, |
| 1597 | * but we can't know if the callback completed already. |
| 1598 | */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1599 | static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | { |
| 1601 | int value; |
| 1602 | |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1603 | if (is_root_hub(urb->dev)) |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1604 | value = usb_rh_urb_dequeue(hcd, urb, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | else { |
| 1606 | |
| 1607 | /* The only reason an HCD might fail this call is if |
| 1608 | * it has not yet fully queued the urb to begin with. |
| 1609 | * Such failures should be harmless. */ |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1610 | value = hcd->driver->urb_dequeue(hcd, urb, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | return value; |
| 1613 | } |
| 1614 | |
| 1615 | /* |
| 1616 | * called in any context |
| 1617 | * |
| 1618 | * caller guarantees urb won't be recycled till both unlink() |
| 1619 | * and the urb's completion function return |
| 1620 | */ |
Alan Stern | a6d2bb9 | 2006-08-30 11:27:36 -0400 | [diff] [blame] | 1621 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | { |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1623 | struct usb_hcd *hcd; |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 1624 | int retval = -EIDRM; |
| 1625 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 1627 | /* Prevent the device and bus from going away while |
| 1628 | * the unlink is carried out. If they are already gone |
| 1629 | * then urb->use_count must be 0, since disconnected |
| 1630 | * devices can't have any active URBs. |
| 1631 | */ |
| 1632 | spin_lock_irqsave(&hcd_urb_unlink_lock, flags); |
| 1633 | if (atomic_read(&urb->use_count) > 0) { |
| 1634 | retval = 0; |
| 1635 | usb_get_dev(urb->dev); |
| 1636 | } |
| 1637 | spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); |
| 1638 | if (retval == 0) { |
| 1639 | hcd = bus_to_hcd(urb->dev->bus); |
| 1640 | retval = unlink1(hcd, urb, status); |
| 1641 | usb_put_dev(urb->dev); |
| 1642 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | if (retval == 0) |
| 1645 | retval = -EINPROGRESS; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1646 | else if (retval != -EIDRM && retval != -EBUSY) |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1647 | dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", |
| 1648 | urb, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | return retval; |
| 1650 | } |
| 1651 | |
| 1652 | /*-------------------------------------------------------------------------*/ |
| 1653 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1654 | static void __usb_hcd_giveback_urb(struct urb *urb) |
| 1655 | { |
| 1656 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); |
Hans de Goede | 6ec4147 | 2013-10-09 17:01:41 +0200 | [diff] [blame] | 1657 | struct usb_anchor *anchor = urb->anchor; |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1658 | int status = urb->unlinked; |
| 1659 | unsigned long flags; |
| 1660 | |
| 1661 | urb->hcpriv = NULL; |
| 1662 | if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && |
| 1663 | urb->actual_length < urb->transfer_buffer_length && |
| 1664 | !status)) |
| 1665 | status = -EREMOTEIO; |
| 1666 | |
| 1667 | unmap_urb_for_dma(hcd, urb); |
| 1668 | usbmon_urb_complete(&hcd->self, urb, status); |
Hans de Goede | 6ec4147 | 2013-10-09 17:01:41 +0200 | [diff] [blame] | 1669 | usb_anchor_suspend_wakeups(anchor); |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1670 | usb_unanchor_urb(urb); |
| 1671 | |
| 1672 | /* pass ownership to the completion handler */ |
| 1673 | urb->status = status; |
| 1674 | |
| 1675 | /* |
| 1676 | * We disable local IRQs here avoid possible deadlock because |
| 1677 | * drivers may call spin_lock() to hold lock which might be |
| 1678 | * acquired in one hard interrupt handler. |
| 1679 | * |
| 1680 | * The local_irq_save()/local_irq_restore() around complete() |
| 1681 | * will be removed if current USB drivers have been cleaned up |
| 1682 | * and no one may trigger the above deadlock situation when |
| 1683 | * running complete() in tasklet. |
| 1684 | */ |
| 1685 | local_irq_save(flags); |
| 1686 | urb->complete(urb); |
| 1687 | local_irq_restore(flags); |
| 1688 | |
Hans de Goede | 6ec4147 | 2013-10-09 17:01:41 +0200 | [diff] [blame] | 1689 | usb_anchor_resume_wakeups(anchor); |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1690 | atomic_dec(&urb->use_count); |
| 1691 | if (unlikely(atomic_read(&urb->reject))) |
| 1692 | wake_up(&usb_kill_urb_queue); |
| 1693 | usb_put_urb(urb); |
| 1694 | } |
| 1695 | |
| 1696 | static void usb_giveback_urb_bh(unsigned long param) |
| 1697 | { |
| 1698 | struct giveback_urb_bh *bh = (struct giveback_urb_bh *)param; |
| 1699 | struct list_head local_list; |
| 1700 | |
| 1701 | spin_lock_irq(&bh->lock); |
| 1702 | bh->running = true; |
| 1703 | restart: |
| 1704 | list_replace_init(&bh->head, &local_list); |
| 1705 | spin_unlock_irq(&bh->lock); |
| 1706 | |
| 1707 | while (!list_empty(&local_list)) { |
| 1708 | struct urb *urb; |
| 1709 | |
| 1710 | urb = list_entry(local_list.next, struct urb, urb_list); |
| 1711 | list_del_init(&urb->urb_list); |
Alan Stern | c7ccde6 | 2013-09-03 13:58:43 -0400 | [diff] [blame] | 1712 | bh->completing_ep = urb->ep; |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1713 | __usb_hcd_giveback_urb(urb); |
Alan Stern | c7ccde6 | 2013-09-03 13:58:43 -0400 | [diff] [blame] | 1714 | bh->completing_ep = NULL; |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1715 | } |
| 1716 | |
| 1717 | /* check if there are new URBs to giveback */ |
| 1718 | spin_lock_irq(&bh->lock); |
| 1719 | if (!list_empty(&bh->head)) |
| 1720 | goto restart; |
| 1721 | bh->running = false; |
| 1722 | spin_unlock_irq(&bh->lock); |
| 1723 | } |
| 1724 | |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1725 | /** |
| 1726 | * usb_hcd_giveback_urb - return URB from HCD to device driver |
| 1727 | * @hcd: host controller returning the URB |
| 1728 | * @urb: urb being returned to the USB device driver. |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1729 | * @status: completion status code for the URB. |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1730 | * Context: in_interrupt() |
| 1731 | * |
| 1732 | * This hands the URB from HCD to its USB device driver, using its |
| 1733 | * completion function. The HCD has freed all per-urb resources |
| 1734 | * (and is done using urb->hcpriv). It also released all HCD locks; |
| 1735 | * the device driver won't cause problems if it frees, modifies, |
| 1736 | * or resubmits this URB. |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1737 | * |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1738 | * If @urb was unlinked, the value of @status will be overridden by |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1739 | * @urb->unlinked. Erroneous short transfers are detected in case |
| 1740 | * the HCD hasn't checked for them. |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1741 | */ |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1742 | 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] | 1743 | { |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1744 | struct giveback_urb_bh *bh; |
| 1745 | bool running, high_prio_bh; |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1746 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1747 | /* pass status to tasklet via unlinked */ |
| 1748 | if (likely(!urb->unlinked)) |
| 1749 | urb->unlinked = status; |
Alan Stern | 1f5a3d0 | 2007-08-22 13:06:53 -0400 | [diff] [blame] | 1750 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 1751 | if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) { |
| 1752 | __usb_hcd_giveback_urb(urb); |
| 1753 | return; |
| 1754 | } |
| 1755 | |
| 1756 | if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) { |
| 1757 | bh = &hcd->high_prio_bh; |
| 1758 | high_prio_bh = true; |
| 1759 | } else { |
| 1760 | bh = &hcd->low_prio_bh; |
| 1761 | high_prio_bh = false; |
| 1762 | } |
| 1763 | |
| 1764 | spin_lock(&bh->lock); |
| 1765 | list_add_tail(&urb->urb_list, &bh->head); |
| 1766 | running = bh->running; |
| 1767 | spin_unlock(&bh->lock); |
| 1768 | |
| 1769 | if (running) |
| 1770 | ; |
| 1771 | else if (high_prio_bh) |
| 1772 | tasklet_hi_schedule(&bh->bh); |
| 1773 | else |
| 1774 | tasklet_schedule(&bh->bh); |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1775 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 1776 | EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 1777 | |
| 1778 | /*-------------------------------------------------------------------------*/ |
| 1779 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1780 | /* Cancel all URBs pending on this endpoint and wait for the endpoint's |
| 1781 | * queue to drain completely. The caller must first insure that no more |
| 1782 | * URBs can be submitted for this endpoint. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | */ |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1784 | void usb_hcd_flush_endpoint(struct usb_device *udev, |
Alan Stern | a6d2bb9 | 2006-08-30 11:27:36 -0400 | [diff] [blame] | 1785 | struct usb_host_endpoint *ep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | { |
| 1787 | struct usb_hcd *hcd; |
| 1788 | struct urb *urb; |
| 1789 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1790 | if (!ep) |
| 1791 | return; |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1792 | might_sleep(); |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 1793 | hcd = bus_to_hcd(udev->bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1795 | /* No more submits can occur */ |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1796 | spin_lock_irq(&hcd_urb_list_lock); |
Alan Stern | ddc1fd6 | 2007-11-21 15:13:10 -0800 | [diff] [blame] | 1797 | rescan: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | list_for_each_entry (urb, &ep->urb_list, urb_list) { |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 1799 | int is_in; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1801 | if (urb->unlinked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | continue; |
| 1803 | usb_get_urb (urb); |
Alan Stern | 5e60a16 | 2007-07-30 17:07:21 -0400 | [diff] [blame] | 1804 | is_in = usb_urb_dir_in(urb); |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1805 | spin_unlock(&hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1807 | /* kick hcd */ |
| 1808 | unlink1(hcd, urb, -ESHUTDOWN); |
| 1809 | dev_dbg (hcd->self.controller, |
| 1810 | "shutdown urb %p ep%d%s%s\n", |
| 1811 | urb, usb_endpoint_num(&ep->desc), |
| 1812 | is_in ? "in" : "out", |
| 1813 | ({ char *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1815 | switch (usb_endpoint_type(&ep->desc)) { |
| 1816 | case USB_ENDPOINT_XFER_CONTROL: |
| 1817 | s = ""; break; |
| 1818 | case USB_ENDPOINT_XFER_BULK: |
| 1819 | s = "-bulk"; break; |
| 1820 | case USB_ENDPOINT_XFER_INT: |
| 1821 | s = "-intr"; break; |
| 1822 | default: |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 1823 | s = "-iso"; break; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1824 | }; |
| 1825 | s; |
| 1826 | })); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | usb_put_urb (urb); |
| 1828 | |
| 1829 | /* list contents may have changed */ |
Alan Stern | ddc1fd6 | 2007-11-21 15:13:10 -0800 | [diff] [blame] | 1830 | spin_lock(&hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | goto rescan; |
| 1832 | } |
Alan Stern | 9a9bf40 | 2007-08-02 15:06:54 -0400 | [diff] [blame] | 1833 | spin_unlock_irq(&hcd_urb_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1835 | /* Wait until the endpoint queue is completely empty */ |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 1836 | while (!list_empty (&ep->urb_list)) { |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1837 | spin_lock_irq(&hcd_urb_list_lock); |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 1838 | |
| 1839 | /* The list may have changed while we acquired the spinlock */ |
| 1840 | urb = NULL; |
| 1841 | if (!list_empty (&ep->urb_list)) { |
| 1842 | urb = list_entry (ep->urb_list.prev, struct urb, |
| 1843 | urb_list); |
| 1844 | usb_get_urb (urb); |
| 1845 | } |
Alan Stern | 809a58b | 2007-07-18 12:14:24 -0400 | [diff] [blame] | 1846 | spin_unlock_irq(&hcd_urb_list_lock); |
Alan Stern | 455b25f | 2006-08-11 16:01:45 -0400 | [diff] [blame] | 1847 | |
| 1848 | if (urb) { |
| 1849 | usb_kill_urb (urb); |
| 1850 | usb_put_urb (urb); |
| 1851 | } |
| 1852 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | } |
| 1854 | |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1855 | /** |
Randy Dunlap | 70445ae | 2009-12-13 10:17:16 -0800 | [diff] [blame] | 1856 | * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds |
| 1857 | * the bus bandwidth |
| 1858 | * @udev: target &usb_device |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1859 | * @new_config: new configuration to install |
| 1860 | * @cur_alt: the current alternate interface setting |
| 1861 | * @new_alt: alternate interface setting that is being installed |
| 1862 | * |
| 1863 | * To change configurations, pass in the new configuration in new_config, |
| 1864 | * and pass NULL for cur_alt and new_alt. |
| 1865 | * |
| 1866 | * To reset a device's configuration (put the device in the ADDRESSED state), |
| 1867 | * pass in NULL for new_config, cur_alt, and new_alt. |
| 1868 | * |
| 1869 | * To change alternate interface settings, pass in NULL for new_config, |
| 1870 | * pass in the current alternate interface setting in cur_alt, |
| 1871 | * and pass in the new alternate interface setting in new_alt. |
| 1872 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 1873 | * Return: An error if the requested bandwidth change exceeds the |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1874 | * bus bandwidth or host controller internal resources. |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1875 | */ |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1876 | int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1877 | struct usb_host_config *new_config, |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1878 | struct usb_host_interface *cur_alt, |
| 1879 | struct usb_host_interface *new_alt) |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1880 | { |
| 1881 | int num_intfs, i, j; |
H Hartley Sweeten | 576a362 | 2009-11-17 14:53:41 -0800 | [diff] [blame] | 1882 | struct usb_host_interface *alt = NULL; |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1883 | int ret = 0; |
| 1884 | struct usb_hcd *hcd; |
| 1885 | struct usb_host_endpoint *ep; |
| 1886 | |
| 1887 | hcd = bus_to_hcd(udev->bus); |
| 1888 | if (!hcd->driver->check_bandwidth) |
| 1889 | return 0; |
| 1890 | |
| 1891 | /* Configuration is being removed - set configuration 0 */ |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1892 | if (!new_config && !cur_alt) { |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1893 | for (i = 1; i < 16; ++i) { |
| 1894 | ep = udev->ep_out[i]; |
| 1895 | if (ep) |
| 1896 | hcd->driver->drop_endpoint(hcd, udev, ep); |
| 1897 | ep = udev->ep_in[i]; |
| 1898 | if (ep) |
| 1899 | hcd->driver->drop_endpoint(hcd, udev, ep); |
| 1900 | } |
| 1901 | hcd->driver->check_bandwidth(hcd, udev); |
| 1902 | return 0; |
| 1903 | } |
| 1904 | /* Check if the HCD says there's enough bandwidth. Enable all endpoints |
| 1905 | * each interface's alt setting 0 and ask the HCD to check the bandwidth |
| 1906 | * of the bus. There will always be bandwidth for endpoint 0, so it's |
| 1907 | * ok to exclude it. |
| 1908 | */ |
| 1909 | if (new_config) { |
| 1910 | num_intfs = new_config->desc.bNumInterfaces; |
| 1911 | /* Remove endpoints (except endpoint 0, which is always on the |
| 1912 | * schedule) from the old config from the schedule |
| 1913 | */ |
| 1914 | for (i = 1; i < 16; ++i) { |
| 1915 | ep = udev->ep_out[i]; |
| 1916 | if (ep) { |
| 1917 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); |
| 1918 | if (ret < 0) |
| 1919 | goto reset; |
| 1920 | } |
| 1921 | ep = udev->ep_in[i]; |
| 1922 | if (ep) { |
| 1923 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); |
| 1924 | if (ret < 0) |
| 1925 | goto reset; |
| 1926 | } |
| 1927 | } |
| 1928 | for (i = 0; i < num_intfs; ++i) { |
Sarah Sharp | d837e21 | 2010-01-05 14:33:29 -0800 | [diff] [blame] | 1929 | struct usb_host_interface *first_alt; |
| 1930 | int iface_num; |
| 1931 | |
| 1932 | first_alt = &new_config->intf_cache[i]->altsetting[0]; |
| 1933 | iface_num = first_alt->desc.bInterfaceNumber; |
Sarah Sharp | 91017f9 | 2009-12-03 09:44:34 -0800 | [diff] [blame] | 1934 | /* Set up endpoints for alternate interface setting 0 */ |
Sarah Sharp | d837e21 | 2010-01-05 14:33:29 -0800 | [diff] [blame] | 1935 | alt = usb_find_alt_setting(new_config, iface_num, 0); |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1936 | if (!alt) |
| 1937 | /* No alt setting 0? Pick the first setting. */ |
Sarah Sharp | d837e21 | 2010-01-05 14:33:29 -0800 | [diff] [blame] | 1938 | alt = first_alt; |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1939 | |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1940 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { |
| 1941 | ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); |
| 1942 | if (ret < 0) |
| 1943 | goto reset; |
| 1944 | } |
| 1945 | } |
| 1946 | } |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1947 | if (cur_alt && new_alt) { |
Sarah Sharp | 04a723e | 2010-01-06 10:16:51 -0800 | [diff] [blame] | 1948 | struct usb_interface *iface = usb_ifnum_to_if(udev, |
| 1949 | cur_alt->desc.bInterfaceNumber); |
| 1950 | |
Sarah Sharp | 8a9af4f | 2011-08-09 16:31:54 -0700 | [diff] [blame] | 1951 | if (!iface) |
| 1952 | return -EINVAL; |
Sarah Sharp | 04a723e | 2010-01-06 10:16:51 -0800 | [diff] [blame] | 1953 | if (iface->resetting_device) { |
| 1954 | /* |
| 1955 | * The USB core just reset the device, so the xHCI host |
| 1956 | * and the device will think alt setting 0 is installed. |
| 1957 | * However, the USB core will pass in the alternate |
| 1958 | * setting installed before the reset as cur_alt. Dig |
| 1959 | * out the alternate setting 0 structure, or the first |
| 1960 | * alternate setting if a broken device doesn't have alt |
| 1961 | * setting 0. |
| 1962 | */ |
| 1963 | cur_alt = usb_altnum_to_altsetting(iface, 0); |
| 1964 | if (!cur_alt) |
| 1965 | cur_alt = &iface->altsetting[0]; |
| 1966 | } |
| 1967 | |
Sarah Sharp | 3f0479e | 2009-12-03 09:44:36 -0800 | [diff] [blame] | 1968 | /* Drop all the endpoints in the current alt setting */ |
| 1969 | for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { |
| 1970 | ret = hcd->driver->drop_endpoint(hcd, udev, |
| 1971 | &cur_alt->endpoint[i]); |
| 1972 | if (ret < 0) |
| 1973 | goto reset; |
| 1974 | } |
| 1975 | /* Add all the endpoints in the new alt setting */ |
| 1976 | for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { |
| 1977 | ret = hcd->driver->add_endpoint(hcd, udev, |
| 1978 | &new_alt->endpoint[i]); |
| 1979 | if (ret < 0) |
| 1980 | goto reset; |
| 1981 | } |
| 1982 | } |
Sarah Sharp | 79abb1a | 2009-04-27 19:58:26 -0700 | [diff] [blame] | 1983 | ret = hcd->driver->check_bandwidth(hcd, udev); |
| 1984 | reset: |
| 1985 | if (ret < 0) |
| 1986 | hcd->driver->reset_bandwidth(hcd, udev); |
| 1987 | return ret; |
| 1988 | } |
| 1989 | |
Alan Stern | 95cf82f | 2007-09-10 11:33:05 -0400 | [diff] [blame] | 1990 | /* Disables the endpoint: synchronizes with the hcd to make sure all |
| 1991 | * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must |
| 1992 | * have been called previously. Use for set_configuration, set_interface, |
| 1993 | * driver removal, physical disconnect. |
| 1994 | * |
| 1995 | * example: a qh stored in ep->hcpriv, holding state related to endpoint |
| 1996 | * type, maxpacket size, toggle, halt status, and scheduling. |
| 1997 | */ |
| 1998 | void usb_hcd_disable_endpoint(struct usb_device *udev, |
| 1999 | struct usb_host_endpoint *ep) |
| 2000 | { |
| 2001 | struct usb_hcd *hcd; |
| 2002 | |
| 2003 | might_sleep(); |
| 2004 | hcd = bus_to_hcd(udev->bus); |
| 2005 | if (hcd->driver->endpoint_disable) |
| 2006 | hcd->driver->endpoint_disable(hcd, ep); |
| 2007 | } |
| 2008 | |
David Vrabel | 3444b26 | 2009-04-08 17:36:28 +0000 | [diff] [blame] | 2009 | /** |
| 2010 | * usb_hcd_reset_endpoint - reset host endpoint state |
| 2011 | * @udev: USB device. |
| 2012 | * @ep: the endpoint to reset. |
| 2013 | * |
| 2014 | * Resets any host endpoint state such as the toggle bit, sequence |
| 2015 | * number and current window. |
| 2016 | */ |
| 2017 | void usb_hcd_reset_endpoint(struct usb_device *udev, |
| 2018 | struct usb_host_endpoint *ep) |
| 2019 | { |
| 2020 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| 2021 | |
| 2022 | if (hcd->driver->endpoint_reset) |
| 2023 | hcd->driver->endpoint_reset(hcd, ep); |
| 2024 | else { |
| 2025 | int epnum = usb_endpoint_num(&ep->desc); |
| 2026 | int is_out = usb_endpoint_dir_out(&ep->desc); |
| 2027 | int is_control = usb_endpoint_xfer_control(&ep->desc); |
| 2028 | |
| 2029 | usb_settoggle(udev, epnum, is_out, 0); |
| 2030 | if (is_control) |
| 2031 | usb_settoggle(udev, epnum, !is_out, 0); |
| 2032 | } |
| 2033 | } |
| 2034 | |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2035 | /** |
| 2036 | * usb_alloc_streams - allocate bulk endpoint stream IDs. |
| 2037 | * @interface: alternate setting that includes all endpoints. |
| 2038 | * @eps: array of endpoints that need streams. |
| 2039 | * @num_eps: number of endpoints in the array. |
| 2040 | * @num_streams: number of streams to allocate. |
| 2041 | * @mem_flags: flags hcd should use to allocate memory. |
| 2042 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2043 | * 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] | 2044 | * Drivers may queue multiple transfers to different stream IDs, which may |
| 2045 | * complete in a different order than they were queued. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2046 | * |
| 2047 | * Return: On success, the number of allocated streams. On failure, a negative |
| 2048 | * error code. |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2049 | */ |
| 2050 | int usb_alloc_streams(struct usb_interface *interface, |
| 2051 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 2052 | unsigned int num_streams, gfp_t mem_flags) |
| 2053 | { |
| 2054 | struct usb_hcd *hcd; |
| 2055 | struct usb_device *dev; |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2056 | int i, ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2057 | |
| 2058 | dev = interface_to_usbdev(interface); |
| 2059 | hcd = bus_to_hcd(dev->bus); |
| 2060 | if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) |
| 2061 | return -EINVAL; |
| 2062 | if (dev->speed != USB_SPEED_SUPER) |
| 2063 | return -EINVAL; |
| 2064 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2065 | for (i = 0; i < num_eps; i++) { |
| 2066 | /* Streams only apply to bulk endpoints. */ |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2067 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) |
| 2068 | return -EINVAL; |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2069 | /* Re-alloc is not allowed */ |
| 2070 | if (eps[i]->streams) |
| 2071 | return -EINVAL; |
| 2072 | } |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2073 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2074 | ret = hcd->driver->alloc_streams(hcd, dev, eps, num_eps, |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2075 | num_streams, mem_flags); |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2076 | if (ret < 0) |
| 2077 | return ret; |
| 2078 | |
| 2079 | for (i = 0; i < num_eps; i++) |
| 2080 | eps[i]->streams = ret; |
| 2081 | |
| 2082 | return ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2083 | } |
| 2084 | EXPORT_SYMBOL_GPL(usb_alloc_streams); |
| 2085 | |
| 2086 | /** |
| 2087 | * usb_free_streams - free bulk endpoint stream IDs. |
| 2088 | * @interface: alternate setting that includes all endpoints. |
| 2089 | * @eps: array of endpoints to remove streams from. |
| 2090 | * @num_eps: number of endpoints in the array. |
| 2091 | * @mem_flags: flags hcd should use to allocate memory. |
| 2092 | * |
| 2093 | * Reverts a group of bulk endpoints back to not using stream IDs. |
| 2094 | * 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] | 2095 | * |
Hans de Goede | 12d4bbc | 2013-10-09 17:19:23 +0200 | [diff] [blame] | 2096 | * Return: 0 on success. On failure, a negative error code. |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2097 | */ |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2098 | int usb_free_streams(struct usb_interface *interface, |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2099 | struct usb_host_endpoint **eps, unsigned int num_eps, |
| 2100 | gfp_t mem_flags) |
| 2101 | { |
| 2102 | struct usb_hcd *hcd; |
| 2103 | struct usb_device *dev; |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2104 | int i, ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2105 | |
| 2106 | dev = interface_to_usbdev(interface); |
| 2107 | hcd = bus_to_hcd(dev->bus); |
| 2108 | if (dev->speed != USB_SPEED_SUPER) |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2109 | return -EINVAL; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2110 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2111 | /* Double-free is not allowed */ |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2112 | for (i = 0; i < num_eps; i++) |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2113 | if (!eps[i] || !eps[i]->streams) |
Hans de Goede | 6c74dad | 2013-08-30 14:03:59 +0200 | [diff] [blame] | 2114 | return -EINVAL; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2115 | |
Hans de Goede | 8d4f70b | 2013-10-09 17:19:25 +0200 | [diff] [blame] | 2116 | ret = hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); |
| 2117 | if (ret < 0) |
| 2118 | return ret; |
| 2119 | |
| 2120 | for (i = 0; i < num_eps; i++) |
| 2121 | eps[i]->streams = 0; |
| 2122 | |
| 2123 | return ret; |
Sarah Sharp | eab1caf | 2010-04-05 10:55:58 -0700 | [diff] [blame] | 2124 | } |
| 2125 | EXPORT_SYMBOL_GPL(usb_free_streams); |
| 2126 | |
Alan Stern | cde217a | 2008-10-21 15:28:46 -0400 | [diff] [blame] | 2127 | /* Protect against drivers that try to unlink URBs after the device |
| 2128 | * is gone, by waiting until all unlinks for @udev are finished. |
| 2129 | * Since we don't currently track URBs by device, simply wait until |
| 2130 | * nothing is running in the locked region of usb_hcd_unlink_urb(). |
| 2131 | */ |
| 2132 | void usb_hcd_synchronize_unlinks(struct usb_device *udev) |
| 2133 | { |
| 2134 | spin_lock_irq(&hcd_urb_unlink_lock); |
| 2135 | spin_unlock_irq(&hcd_urb_unlink_lock); |
| 2136 | } |
| 2137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | /*-------------------------------------------------------------------------*/ |
| 2139 | |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 2140 | /* called in any context */ |
| 2141 | int usb_hcd_get_frame_number (struct usb_device *udev) |
| 2142 | { |
| 2143 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| 2144 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2145 | if (!HCD_RH_RUNNING(hcd)) |
Alan Stern | 32aca56 | 2007-07-18 12:08:02 -0400 | [diff] [blame] | 2146 | return -ESHUTDOWN; |
| 2147 | return hcd->driver->get_frame_number (hcd); |
| 2148 | } |
| 2149 | |
| 2150 | /*-------------------------------------------------------------------------*/ |
| 2151 | |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2152 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | |
Alan Stern | 65bfd29 | 2008-11-25 16:39:18 -0500 | [diff] [blame] | 2154 | int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | { |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2156 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
| 2157 | int status; |
| 2158 | int old_state = hcd->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | |
Alan Stern | 30b1a7a | 2011-09-27 21:54:22 +0200 | [diff] [blame] | 2160 | dev_dbg(&rhdev->dev, "bus %ssuspend, wakeup %d\n", |
| 2161 | (PMSG_IS_AUTO(msg) ? "auto-" : ""), |
| 2162 | rhdev->do_remote_wakeup); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2163 | if (HCD_DEAD(hcd)) { |
| 2164 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); |
| 2165 | return 0; |
| 2166 | } |
| 2167 | |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2168 | if (!hcd->driver->bus_suspend) { |
| 2169 | status = -ENOENT; |
| 2170 | } else { |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2171 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2172 | hcd->state = HC_STATE_QUIESCING; |
| 2173 | status = hcd->driver->bus_suspend(hcd); |
| 2174 | } |
| 2175 | if (status == 0) { |
| 2176 | usb_set_device_state(rhdev, USB_STATE_SUSPENDED); |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2177 | hcd->state = HC_STATE_SUSPENDED; |
Alan Stern | 879d38e | 2012-04-03 15:24:18 -0400 | [diff] [blame] | 2178 | |
| 2179 | /* Did we race with a root-hub wakeup event? */ |
| 2180 | if (rhdev->do_remote_wakeup) { |
| 2181 | char buffer[6]; |
| 2182 | |
| 2183 | status = hcd->driver->hub_status_data(hcd, buffer); |
| 2184 | if (status != 0) { |
| 2185 | dev_dbg(&rhdev->dev, "suspend raced with wakeup event\n"); |
| 2186 | hcd_bus_resume(rhdev, PMSG_AUTO_RESUME); |
| 2187 | status = -EBUSY; |
| 2188 | } |
| 2189 | } |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2190 | } else { |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2191 | spin_lock_irq(&hcd_root_hub_lock); |
| 2192 | if (!HCD_DEAD(hcd)) { |
| 2193 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2194 | hcd->state = old_state; |
| 2195 | } |
| 2196 | spin_unlock_irq(&hcd_root_hub_lock); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2197 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2198 | "suspend", status); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2199 | } |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2200 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | } |
| 2202 | |
Alan Stern | 65bfd29 | 2008-11-25 16:39:18 -0500 | [diff] [blame] | 2203 | int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | { |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2205 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
| 2206 | int status; |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 2207 | int old_state = hcd->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | |
Alan Stern | 30b1a7a | 2011-09-27 21:54:22 +0200 | [diff] [blame] | 2209 | dev_dbg(&rhdev->dev, "usb %sresume\n", |
| 2210 | (PMSG_IS_AUTO(msg) ? "auto-" : "")); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2211 | if (HCD_DEAD(hcd)) { |
| 2212 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); |
| 2213 | return 0; |
| 2214 | } |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 2215 | if (!hcd->driver->bus_resume) |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2216 | return -ENOENT; |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2217 | if (HCD_RH_RUNNING(hcd)) |
David Brownell | 979d519 | 2005-09-22 22:32:24 -0700 | [diff] [blame] | 2218 | return 0; |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2219 | |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2220 | hcd->state = HC_STATE_RESUMING; |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2221 | status = hcd->driver->bus_resume(hcd); |
Alan Stern | bf3d7d4 | 2011-02-02 13:59:33 -0500 | [diff] [blame] | 2222 | clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2223 | if (status == 0) { |
Alan Stern | bfd1e91 | 2012-10-19 11:03:39 -0400 | [diff] [blame] | 2224 | struct usb_device *udev; |
| 2225 | int port1; |
| 2226 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2227 | spin_lock_irq(&hcd_root_hub_lock); |
| 2228 | if (!HCD_DEAD(hcd)) { |
| 2229 | usb_set_device_state(rhdev, rhdev->actconfig |
| 2230 | ? USB_STATE_CONFIGURED |
| 2231 | : USB_STATE_ADDRESS); |
| 2232 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2233 | hcd->state = HC_STATE_RUNNING; |
| 2234 | } |
| 2235 | spin_unlock_irq(&hcd_root_hub_lock); |
Alan Stern | bfd1e91 | 2012-10-19 11:03:39 -0400 | [diff] [blame] | 2236 | |
| 2237 | /* |
| 2238 | * Check whether any of the enabled ports on the root hub are |
| 2239 | * unsuspended. If they are then a TRSMRCY delay is needed |
| 2240 | * (this is what the USB-2 spec calls a "global resume"). |
| 2241 | * Otherwise we can skip the delay. |
| 2242 | */ |
| 2243 | usb_hub_for_each_child(rhdev, port1, udev) { |
| 2244 | if (udev->state != USB_STATE_NOTATTACHED && |
| 2245 | !udev->port_is_suspended) { |
| 2246 | usleep_range(10000, 11000); /* TRSMRCY */ |
| 2247 | break; |
| 2248 | } |
| 2249 | } |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2250 | } else { |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 2251 | hcd->state = old_state; |
Alan Stern | 686314c | 2007-05-30 15:34:36 -0400 | [diff] [blame] | 2252 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2253 | "resume", status); |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 2254 | if (status != -ESHUTDOWN) |
| 2255 | usb_hc_died(hcd); |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2256 | } |
| 2257 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | } |
| 2259 | |
Alan Stern | 9bbdf1e | 2010-01-08 12:57:28 -0500 | [diff] [blame] | 2260 | #endif /* CONFIG_PM */ |
| 2261 | |
Alan Stern | 84ebc10 | 2013-03-27 16:14:46 -0400 | [diff] [blame] | 2262 | #ifdef CONFIG_PM_RUNTIME |
Alan Stern | 9bbdf1e | 2010-01-08 12:57:28 -0500 | [diff] [blame] | 2263 | |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2264 | /* Workqueue routine for root-hub remote wakeup */ |
| 2265 | static void hcd_resume_work(struct work_struct *work) |
| 2266 | { |
| 2267 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); |
| 2268 | struct usb_device *udev = hcd->self.root_hub; |
| 2269 | |
| 2270 | usb_lock_device(udev); |
Alan Stern | 0534d46 | 2010-01-08 12:56:30 -0500 | [diff] [blame] | 2271 | usb_remote_wakeup(udev); |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2272 | usb_unlock_device(udev); |
| 2273 | } |
| 2274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | /** |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 2276 | * 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] | 2277 | * @hcd: host controller for this root hub |
| 2278 | * |
| 2279 | * The USB host controller calls this function when its root hub is |
| 2280 | * suspended (with the remote wakeup feature enabled) and a remote |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2281 | * wakeup request is received. The routine submits a workqueue request |
| 2282 | * to resume the root hub (that is, manage its downstream ports again). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | */ |
| 2284 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) |
| 2285 | { |
| 2286 | unsigned long flags; |
| 2287 | |
| 2288 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
Alan Stern | ff2f078 | 2010-06-25 14:02:35 -0400 | [diff] [blame] | 2289 | if (hcd->rh_registered) { |
| 2290 | set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
Alan Stern | 9bbdf1e | 2010-01-08 12:57:28 -0500 | [diff] [blame] | 2291 | queue_work(pm_wq, &hcd->wakeup_work); |
Alan Stern | ff2f078 | 2010-06-25 14:02:35 -0400 | [diff] [blame] | 2292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
| 2294 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
| 2296 | |
Alan Stern | 84ebc10 | 2013-03-27 16:14:46 -0400 | [diff] [blame] | 2297 | #endif /* CONFIG_PM_RUNTIME */ |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 2298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | /*-------------------------------------------------------------------------*/ |
| 2300 | |
| 2301 | #ifdef CONFIG_USB_OTG |
| 2302 | |
| 2303 | /** |
| 2304 | * usb_bus_start_enum - start immediate enumeration (for OTG) |
| 2305 | * @bus: the bus (must use hcd framework) |
| 2306 | * @port_num: 1-based number of port; usually bus->otg_port |
| 2307 | * Context: in_interrupt() |
| 2308 | * |
| 2309 | * Starts enumeration, with an immediate reset followed later by |
| 2310 | * khubd identifying and possibly configuring the device. |
| 2311 | * This is needed by OTG controller drivers, where it helps meet |
| 2312 | * HNP protocol timing requirements for starting a port reset. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2313 | * |
| 2314 | * Return: 0 if successful. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | */ |
| 2316 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) |
| 2317 | { |
| 2318 | struct usb_hcd *hcd; |
| 2319 | int status = -EOPNOTSUPP; |
| 2320 | |
| 2321 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, |
| 2322 | * boards with root hubs hooked up to internal devices (instead of |
| 2323 | * just the OTG port) may need more attention to resetting... |
| 2324 | */ |
| 2325 | hcd = container_of (bus, struct usb_hcd, self); |
| 2326 | if (port_num && hcd->driver->start_port_reset) |
| 2327 | status = hcd->driver->start_port_reset(hcd, port_num); |
| 2328 | |
| 2329 | /* run khubd shortly after (first) root port reset finishes; |
| 2330 | * it may issue others, until at least 50 msecs have passed. |
| 2331 | */ |
| 2332 | if (status == 0) |
| 2333 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); |
| 2334 | return status; |
| 2335 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2336 | EXPORT_SYMBOL_GPL(usb_bus_start_enum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | |
| 2338 | #endif |
| 2339 | |
| 2340 | /*-------------------------------------------------------------------------*/ |
| 2341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) |
| 2344 | * @irq: the IRQ being raised |
| 2345 | * @__hcd: pointer to the HCD whose IRQ is being signaled |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | * |
| 2347 | * If the controller isn't HALTed, calls the driver's irq handler. |
| 2348 | * Checks whether the controller is now dead. |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2349 | * |
| 2350 | * Return: %IRQ_HANDLED if the IRQ was handled. %IRQ_NONE otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2352 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | { |
| 2354 | struct usb_hcd *hcd = __hcd; |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2355 | irqreturn_t rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | |
Alan Stern | 968b822 | 2011-11-03 12:03:38 -0400 | [diff] [blame] | 2357 | if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2358 | rc = IRQ_NONE; |
Alan Stern | 968b822 | 2011-11-03 12:03:38 -0400 | [diff] [blame] | 2359 | else if (hcd->driver->irq(hcd) == IRQ_NONE) |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2360 | rc = IRQ_NONE; |
Alan Stern | 968b822 | 2011-11-03 12:03:38 -0400 | [diff] [blame] | 2361 | else |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2362 | rc = IRQ_HANDLED; |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2363 | |
Stefan Becker | de85422 | 2008-07-01 19:19:22 +0300 | [diff] [blame] | 2364 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | } |
Dong Nguyen | 43b86af | 2010-07-21 16:56:08 -0700 | [diff] [blame] | 2366 | EXPORT_SYMBOL_GPL(usb_hcd_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
| 2368 | /*-------------------------------------------------------------------------*/ |
| 2369 | |
| 2370 | /** |
| 2371 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) |
| 2372 | * @hcd: pointer to the HCD representing the controller |
| 2373 | * |
| 2374 | * This is called by bus glue to report a USB host controller that died |
| 2375 | * while operations may still have been pending. It's called automatically |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2376 | * by the PCI glue, so only glue for non-PCI busses should need to call it. |
| 2377 | * |
| 2378 | * Only call this function with the primary HCD. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | */ |
| 2380 | void usb_hc_died (struct usb_hcd *hcd) |
| 2381 | { |
| 2382 | unsigned long flags; |
| 2383 | |
| 2384 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); |
| 2385 | |
| 2386 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2387 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2388 | set_bit(HCD_FLAG_DEAD, &hcd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | if (hcd->rh_registered) { |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2390 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | |
| 2392 | /* make khubd clean up old urbs and devices */ |
| 2393 | usb_set_device_state (hcd->self.root_hub, |
| 2394 | USB_STATE_NOTATTACHED); |
| 2395 | usb_kick_khubd (hcd->self.root_hub); |
| 2396 | } |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2397 | if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { |
| 2398 | hcd = hcd->shared_hcd; |
| 2399 | if (hcd->rh_registered) { |
| 2400 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
| 2401 | |
| 2402 | /* make khubd clean up old urbs and devices */ |
| 2403 | usb_set_device_state(hcd->self.root_hub, |
| 2404 | USB_STATE_NOTATTACHED); |
| 2405 | usb_kick_khubd(hcd->self.root_hub); |
| 2406 | } |
| 2407 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2409 | /* Make sure that the other roothub is also deallocated. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | } |
| 2411 | EXPORT_SYMBOL_GPL (usb_hc_died); |
| 2412 | |
| 2413 | /*-------------------------------------------------------------------------*/ |
| 2414 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 2415 | static void init_giveback_urb_bh(struct giveback_urb_bh *bh) |
| 2416 | { |
| 2417 | |
| 2418 | spin_lock_init(&bh->lock); |
| 2419 | INIT_LIST_HEAD(&bh->head); |
| 2420 | tasklet_init(&bh->bh, usb_giveback_urb_bh, (unsigned long)bh); |
| 2421 | } |
| 2422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2423 | /** |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2424 | * usb_create_shared_hcd - create and initialize an HCD structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | * @driver: HC driver that will use this hcd |
| 2426 | * @dev: device for this HC, stored in hcd->self.controller |
| 2427 | * @bus_name: value to store in hcd->self.bus_name |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2428 | * @primary_hcd: a pointer to the usb_hcd structure that is sharing the |
| 2429 | * PCI device. Only allocate certain resources for the primary HCD |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | * Context: !in_interrupt() |
| 2431 | * |
| 2432 | * Allocate a struct usb_hcd, with extra space at the end for the |
| 2433 | * HC driver's private data. Initialize the generic members of the |
| 2434 | * hcd structure. |
| 2435 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2436 | * Return: On success, a pointer to the created and initialized HCD structure. |
| 2437 | * On failure (e.g. if memory is unavailable), %NULL. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | */ |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2439 | struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
| 2440 | struct device *dev, const char *bus_name, |
| 2441 | struct usb_hcd *primary_hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | { |
| 2443 | struct usb_hcd *hcd; |
| 2444 | |
Pekka Enberg | 7b842b6 | 2005-09-06 15:18:34 -0700 | [diff] [blame] | 2445 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | if (!hcd) { |
| 2447 | dev_dbg (dev, "hcd alloc failed\n"); |
| 2448 | return NULL; |
| 2449 | } |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2450 | if (primary_hcd == NULL) { |
| 2451 | hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), |
| 2452 | GFP_KERNEL); |
| 2453 | if (!hcd->bandwidth_mutex) { |
| 2454 | kfree(hcd); |
| 2455 | dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); |
| 2456 | return NULL; |
| 2457 | } |
| 2458 | mutex_init(hcd->bandwidth_mutex); |
| 2459 | dev_set_drvdata(dev, hcd); |
| 2460 | } else { |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2461 | mutex_lock(&usb_port_peer_mutex); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2462 | hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; |
| 2463 | hcd->primary_hcd = primary_hcd; |
| 2464 | primary_hcd->primary_hcd = primary_hcd; |
| 2465 | hcd->shared_hcd = primary_hcd; |
| 2466 | primary_hcd->shared_hcd = hcd; |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2467 | mutex_unlock(&usb_port_peer_mutex); |
Sarah Sharp | d673bfc | 2010-10-15 08:55:24 -0700 | [diff] [blame] | 2468 | } |
Sarah Sharp | d673bfc | 2010-10-15 08:55:24 -0700 | [diff] [blame] | 2469 | |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2470 | kref_init(&hcd->kref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | |
| 2472 | usb_bus_init(&hcd->self); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | hcd->self.controller = dev; |
| 2474 | hcd->self.bus_name = bus_name; |
Alan Stern | dd990f1 | 2006-08-30 11:29:56 -0400 | [diff] [blame] | 2475 | hcd->self.uses_dma = (dev->dma_mask != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2476 | |
| 2477 | init_timer(&hcd->rh_timer); |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 2478 | hcd->rh_timer.function = rh_timer_func; |
| 2479 | hcd->rh_timer.data = (unsigned long) hcd; |
Alan Stern | 84ebc10 | 2013-03-27 16:14:46 -0400 | [diff] [blame] | 2480 | #ifdef CONFIG_PM_RUNTIME |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2481 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); |
| 2482 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | |
| 2484 | hcd->driver = driver; |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 2485 | hcd->speed = driver->flags & HCD_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2486 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : |
| 2487 | "USB Host Controller"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | return hcd; |
| 2489 | } |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2490 | EXPORT_SYMBOL_GPL(usb_create_shared_hcd); |
| 2491 | |
| 2492 | /** |
| 2493 | * usb_create_hcd - create and initialize an HCD structure |
| 2494 | * @driver: HC driver that will use this hcd |
| 2495 | * @dev: device for this HC, stored in hcd->self.controller |
| 2496 | * @bus_name: value to store in hcd->self.bus_name |
| 2497 | * Context: !in_interrupt() |
| 2498 | * |
| 2499 | * Allocate a struct usb_hcd, with extra space at the end for the |
| 2500 | * HC driver's private data. Initialize the generic members of the |
| 2501 | * hcd structure. |
| 2502 | * |
Yacine Belkadi | 626f090 | 2013-08-02 20:10:04 +0200 | [diff] [blame] | 2503 | * Return: On success, a pointer to the created and initialized HCD |
| 2504 | * structure. On failure (e.g. if memory is unavailable), %NULL. |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2505 | */ |
| 2506 | struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, |
| 2507 | struct device *dev, const char *bus_name) |
| 2508 | { |
| 2509 | return usb_create_shared_hcd(driver, dev, bus_name, NULL); |
| 2510 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2511 | EXPORT_SYMBOL_GPL(usb_create_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2513 | /* |
| 2514 | * Roothubs that share one PCI device must also share the bandwidth mutex. |
| 2515 | * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is |
| 2516 | * deallocated. |
| 2517 | * |
| 2518 | * Make sure to only deallocate the bandwidth_mutex when the primary HCD is |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2519 | * freed. When hcd_release() is called for either hcd in a peer set |
| 2520 | * invalidate the peer's ->shared_hcd and ->primary_hcd pointers to |
| 2521 | * block new peering attempts |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2522 | */ |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2523 | static void hcd_release(struct kref *kref) |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2524 | { |
| 2525 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); |
| 2526 | |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2527 | mutex_lock(&usb_port_peer_mutex); |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2528 | if (usb_hcd_is_primary_hcd(hcd)) |
| 2529 | kfree(hcd->bandwidth_mutex); |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2530 | if (hcd->shared_hcd) { |
| 2531 | struct usb_hcd *peer = hcd->shared_hcd; |
| 2532 | |
| 2533 | peer->shared_hcd = NULL; |
| 2534 | if (peer->primary_hcd == hcd) |
| 2535 | peer->primary_hcd = NULL; |
| 2536 | } |
| 2537 | mutex_unlock(&usb_port_peer_mutex); |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2538 | kfree(hcd); |
| 2539 | } |
| 2540 | |
| 2541 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) |
| 2542 | { |
| 2543 | if (hcd) |
| 2544 | kref_get (&hcd->kref); |
| 2545 | return hcd; |
| 2546 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2547 | EXPORT_SYMBOL_GPL(usb_get_hcd); |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | void usb_put_hcd (struct usb_hcd *hcd) |
| 2550 | { |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 2551 | if (hcd) |
| 2552 | kref_put (&hcd->kref, hcd_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2554 | EXPORT_SYMBOL_GPL(usb_put_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2556 | int usb_hcd_is_primary_hcd(struct usb_hcd *hcd) |
| 2557 | { |
| 2558 | if (!hcd->primary_hcd) |
| 2559 | return 1; |
| 2560 | return hcd == hcd->primary_hcd; |
| 2561 | } |
| 2562 | EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); |
| 2563 | |
Lan Tianyu | 3f5eb14 | 2013-03-19 16:48:12 +0800 | [diff] [blame] | 2564 | int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1) |
| 2565 | { |
| 2566 | if (!hcd->driver->find_raw_port_number) |
| 2567 | return port1; |
| 2568 | |
| 2569 | return hcd->driver->find_raw_port_number(hcd, port1); |
| 2570 | } |
| 2571 | |
Sarah Sharp | 23e0d10 | 2010-10-21 11:14:54 -0700 | [diff] [blame] | 2572 | static int usb_hcd_request_irqs(struct usb_hcd *hcd, |
| 2573 | unsigned int irqnum, unsigned long irqflags) |
| 2574 | { |
| 2575 | int retval; |
| 2576 | |
| 2577 | if (hcd->driver->irq) { |
Greg Kroah-Hartman | e592c5d | 2012-11-13 10:52:52 -0800 | [diff] [blame] | 2578 | |
Sarah Sharp | 23e0d10 | 2010-10-21 11:14:54 -0700 | [diff] [blame] | 2579 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", |
| 2580 | hcd->driver->description, hcd->self.busnum); |
| 2581 | retval = request_irq(irqnum, &usb_hcd_irq, irqflags, |
| 2582 | hcd->irq_descr, hcd); |
| 2583 | if (retval != 0) { |
| 2584 | dev_err(hcd->self.controller, |
| 2585 | "request interrupt %d failed\n", |
| 2586 | irqnum); |
| 2587 | return retval; |
| 2588 | } |
| 2589 | hcd->irq = irqnum; |
| 2590 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, |
| 2591 | (hcd->driver->flags & HCD_MEMORY) ? |
| 2592 | "io mem" : "io base", |
| 2593 | (unsigned long long)hcd->rsrc_start); |
| 2594 | } else { |
Felipe Balbi | cd70469 | 2012-02-29 16:46:23 +0200 | [diff] [blame] | 2595 | hcd->irq = 0; |
Sarah Sharp | 23e0d10 | 2010-10-21 11:14:54 -0700 | [diff] [blame] | 2596 | if (hcd->rsrc_start) |
| 2597 | dev_info(hcd->self.controller, "%s 0x%08llx\n", |
| 2598 | (hcd->driver->flags & HCD_MEMORY) ? |
| 2599 | "io mem" : "io base", |
| 2600 | (unsigned long long)hcd->rsrc_start); |
| 2601 | } |
| 2602 | return 0; |
| 2603 | } |
| 2604 | |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2605 | /* |
| 2606 | * Before we free this root hub, flush in-flight peering attempts |
| 2607 | * and disable peer lookups |
| 2608 | */ |
| 2609 | static void usb_put_invalidate_rhdev(struct usb_hcd *hcd) |
| 2610 | { |
| 2611 | struct usb_device *rhdev; |
| 2612 | |
| 2613 | mutex_lock(&usb_port_peer_mutex); |
| 2614 | rhdev = hcd->self.root_hub; |
| 2615 | hcd->self.root_hub = NULL; |
| 2616 | mutex_unlock(&usb_port_peer_mutex); |
| 2617 | usb_put_dev(rhdev); |
| 2618 | } |
| 2619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | /** |
| 2621 | * usb_add_hcd - finish generic HCD structure initialization and register |
| 2622 | * @hcd: the usb_hcd structure to initialize |
| 2623 | * @irqnum: Interrupt line to allocate |
| 2624 | * @irqflags: Interrupt type flags |
| 2625 | * |
| 2626 | * Finish the remaining parts of generic HCD initialization: allocate the |
| 2627 | * buffers of consistent memory, register the bus, request the IRQ line, |
| 2628 | * and call the driver's reset() and start() routines. |
| 2629 | */ |
| 2630 | int usb_add_hcd(struct usb_hcd *hcd, |
| 2631 | unsigned int irqnum, unsigned long irqflags) |
| 2632 | { |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2633 | int retval; |
| 2634 | struct usb_device *rhdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2635 | |
Valentine Barshak | 1ae5799 | 2013-12-04 01:42:22 +0400 | [diff] [blame] | 2636 | if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->phy) { |
| 2637 | struct usb_phy *phy = usb_get_phy_dev(hcd->self.controller, 0); |
| 2638 | |
| 2639 | if (IS_ERR(phy)) { |
| 2640 | retval = PTR_ERR(phy); |
| 2641 | if (retval == -EPROBE_DEFER) |
| 2642 | return retval; |
| 2643 | } else { |
| 2644 | retval = usb_phy_init(phy); |
| 2645 | if (retval) { |
| 2646 | usb_put_phy(phy); |
| 2647 | return retval; |
| 2648 | } |
| 2649 | hcd->phy = phy; |
| 2650 | hcd->remove_phy = 1; |
| 2651 | } |
| 2652 | } |
| 2653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); |
| 2655 | |
Carl-Daniel Hailfinger | c4fc234 | 2011-05-31 21:31:08 +0200 | [diff] [blame] | 2656 | /* Keep old behaviour if authorized_default is not in [0, 1]. */ |
| 2657 | if (authorized_default < 0 || authorized_default > 1) |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 2658 | hcd->authorized_default = hcd->wireless ? 0 : 1; |
Carl-Daniel Hailfinger | c4fc234 | 2011-05-31 21:31:08 +0200 | [diff] [blame] | 2659 | else |
| 2660 | hcd->authorized_default = authorized_default; |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 2661 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 2662 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2663 | /* HC is in reset state, but accessible. Now do the one-time init, |
| 2664 | * bottom up so that hcds can customize the root hubs before khubd |
| 2665 | * starts talking to them. (Note, bus id is assigned early too.) |
| 2666 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | if ((retval = hcd_buffer_create(hcd)) != 0) { |
| 2668 | dev_dbg(hcd->self.controller, "pool alloc failed\n"); |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 2669 | goto err_remove_phy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2670 | } |
| 2671 | |
| 2672 | if ((retval = usb_register_bus(&hcd->self)) < 0) |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2673 | goto err_register_bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2675 | if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { |
| 2676 | dev_err(hcd->self.controller, "unable to allocate root hub\n"); |
| 2677 | retval = -ENOMEM; |
| 2678 | goto err_allocate_root_hub; |
| 2679 | } |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2680 | mutex_lock(&usb_port_peer_mutex); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2681 | hcd->self.root_hub = rhdev; |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2682 | mutex_unlock(&usb_port_peer_mutex); |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2683 | |
Sarah Sharp | 83de4b2 | 2010-12-02 14:45:18 -0800 | [diff] [blame] | 2684 | switch (hcd->speed) { |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2685 | case HCD_USB11: |
| 2686 | rhdev->speed = USB_SPEED_FULL; |
| 2687 | break; |
| 2688 | case HCD_USB2: |
| 2689 | rhdev->speed = USB_SPEED_HIGH; |
| 2690 | break; |
Thomas Pugliese | 1a81f88 | 2013-05-31 14:16:13 -0500 | [diff] [blame] | 2691 | case HCD_USB25: |
| 2692 | rhdev->speed = USB_SPEED_WIRELESS; |
| 2693 | break; |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2694 | case HCD_USB3: |
| 2695 | rhdev->speed = USB_SPEED_SUPER; |
| 2696 | break; |
| 2697 | default: |
Sebastian Andrzej Siewior | 1d15ee4 | 2011-04-14 11:22:32 +0200 | [diff] [blame] | 2698 | retval = -EINVAL; |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2699 | goto err_set_rh_speed; |
Sarah Sharp | 6b403b0 | 2009-04-27 19:54:10 -0700 | [diff] [blame] | 2700 | } |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2701 | |
David Brownell | db4cefa | 2006-05-01 22:07:13 -0700 | [diff] [blame] | 2702 | /* wakeup flag init defaults to "everything works" for root hubs, |
| 2703 | * but drivers can override it in reset() if needed, along with |
| 2704 | * recording the overall controller's system wakeup capability. |
| 2705 | */ |
Alan Stern | a6eeeb9 | 2011-09-26 11:23:38 -0400 | [diff] [blame] | 2706 | device_set_wakeup_capable(&rhdev->dev, 1); |
David Brownell | db4cefa | 2006-05-01 22:07:13 -0700 | [diff] [blame] | 2707 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2708 | /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is |
| 2709 | * registered. But since the controller can die at any time, |
| 2710 | * let's initialize the flag before touching the hardware. |
| 2711 | */ |
| 2712 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
| 2713 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2714 | /* "reset" is misnamed; its role is now one-time init. the controller |
| 2715 | * should already have been reset (and boot firmware kicked off etc). |
| 2716 | */ |
| 2717 | if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { |
Mark Brown | c10750b | 2013-08-07 22:32:40 +0100 | [diff] [blame] | 2718 | dev_err(hcd->self.controller, "can't setup: %d\n", retval); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2719 | goto err_hcd_driver_setup; |
| 2720 | } |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2721 | hcd->rh_pollable = 1; |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2722 | |
David Brownell | fb669cc | 2006-01-24 08:40:27 -0800 | [diff] [blame] | 2723 | /* NOTE: root hub and controller capabilities may not be the same */ |
| 2724 | if (device_can_wakeup(hcd->self.controller) |
| 2725 | && device_can_wakeup(&hcd->self.root_hub->dev)) |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2726 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2727 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 2728 | /* initialize tasklets */ |
| 2729 | init_giveback_urb_bh(&hcd->high_prio_bh); |
| 2730 | init_giveback_urb_bh(&hcd->low_prio_bh); |
| 2731 | |
Sarah Sharp | 68d07f6 | 2012-02-13 16:25:57 -0800 | [diff] [blame] | 2732 | /* enable irqs just before we start the controller, |
| 2733 | * if the BIOS provides legacy PCI irqs. |
| 2734 | */ |
| 2735 | if (usb_hcd_is_primary_hcd(hcd) && irqnum) { |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2736 | retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); |
| 2737 | if (retval) |
| 2738 | goto err_request_irq; |
| 2739 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | |
Sarah Sharp | 4814030 | 2011-03-11 13:46:17 -0800 | [diff] [blame] | 2741 | hcd->state = HC_STATE_RUNNING; |
Sarah Sharp | abc4f9b | 2010-12-01 09:22:05 -0800 | [diff] [blame] | 2742 | retval = hcd->driver->start(hcd); |
| 2743 | if (retval < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2744 | dev_err(hcd->self.controller, "startup error %d\n", retval); |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2745 | goto err_hcd_driver_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2746 | } |
| 2747 | |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2748 | /* starting here, usbcore will pay attention to this root hub */ |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2749 | if ((retval = register_root_hub(hcd)) != 0) |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2750 | goto err_register_root_hub; |
| 2751 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 2752 | retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
| 2753 | if (retval < 0) { |
| 2754 | printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", |
| 2755 | retval); |
| 2756 | goto error_create_attr_group; |
| 2757 | } |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2758 | if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) |
Alan Stern | d5926ae7 | 2005-04-21 15:56:37 -0400 | [diff] [blame] | 2759 | usb_hcd_poll_rh_status(hcd); |
Alan Stern | a6eeeb9 | 2011-09-26 11:23:38 -0400 | [diff] [blame] | 2760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | return retval; |
| 2762 | |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 2763 | error_create_attr_group: |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2764 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2765 | if (HC_IS_RUNNING(hcd->state)) |
| 2766 | hcd->state = HC_STATE_QUIESCING; |
| 2767 | spin_lock_irq(&hcd_root_hub_lock); |
| 2768 | hcd->rh_registered = 0; |
| 2769 | spin_unlock_irq(&hcd_root_hub_lock); |
| 2770 | |
Alan Stern | 84ebc10 | 2013-03-27 16:14:46 -0400 | [diff] [blame] | 2771 | #ifdef CONFIG_PM_RUNTIME |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2772 | cancel_work_sync(&hcd->wakeup_work); |
| 2773 | #endif |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 2774 | mutex_lock(&usb_bus_list_lock); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2775 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
Inaky Perez-Gonzalez | 5234ce1 | 2007-07-31 20:33:58 -0700 | [diff] [blame] | 2776 | mutex_unlock(&usb_bus_list_lock); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2777 | err_register_root_hub: |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2778 | hcd->rh_pollable = 0; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2779 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2780 | del_timer_sync(&hcd->rh_timer); |
Alan Stern | 8ec8d20 | 2005-04-25 11:25:17 -0400 | [diff] [blame] | 2781 | hcd->driver->stop(hcd); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2782 | hcd->state = HC_STATE_HALT; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2783 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2784 | del_timer_sync(&hcd->rh_timer); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2785 | err_hcd_driver_start: |
Felipe Balbi | cd70469 | 2012-02-29 16:46:23 +0200 | [diff] [blame] | 2786 | if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2787 | free_irq(irqnum, hcd); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2788 | err_request_irq: |
| 2789 | err_hcd_driver_setup: |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2790 | err_set_rh_speed: |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2791 | usb_put_invalidate_rhdev(hcd); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2792 | err_allocate_root_hub: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | usb_deregister_bus(&hcd->self); |
David Brownell | b1e8f0a | 2006-01-23 15:25:40 -0800 | [diff] [blame] | 2794 | err_register_bus: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | hcd_buffer_destroy(hcd); |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 2796 | err_remove_phy: |
| 2797 | if (hcd->remove_phy && hcd->phy) { |
| 2798 | usb_phy_shutdown(hcd->phy); |
| 2799 | usb_put_phy(hcd->phy); |
| 2800 | hcd->phy = NULL; |
| 2801 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | return retval; |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 2803 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2804 | EXPORT_SYMBOL_GPL(usb_add_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | |
| 2806 | /** |
| 2807 | * usb_remove_hcd - shutdown processing for generic HCDs |
| 2808 | * @hcd: the usb_hcd structure to remove |
| 2809 | * Context: !in_interrupt() |
| 2810 | * |
| 2811 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), |
| 2812 | * invoking the HCD's stop() method. |
| 2813 | */ |
| 2814 | void usb_remove_hcd(struct usb_hcd *hcd) |
| 2815 | { |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2816 | struct usb_device *rhdev = hcd->self.root_hub; |
| 2817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); |
| 2819 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2820 | usb_get_dev(rhdev); |
| 2821 | sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
Alan Stern | 96e077a | 2010-06-09 17:34:05 -0400 | [diff] [blame] | 2822 | |
Alan Stern | 9b37596 | 2011-03-07 11:11:52 -0500 | [diff] [blame] | 2823 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | if (HC_IS_RUNNING (hcd->state)) |
| 2825 | hcd->state = HC_STATE_QUIESCING; |
| 2826 | |
| 2827 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); |
| 2828 | spin_lock_irq (&hcd_root_hub_lock); |
| 2829 | hcd->rh_registered = 0; |
| 2830 | spin_unlock_irq (&hcd_root_hub_lock); |
Alan Stern | 9ad3d6c | 2005-11-17 17:10:32 -0500 | [diff] [blame] | 2831 | |
Alan Stern | 84ebc10 | 2013-03-27 16:14:46 -0400 | [diff] [blame] | 2832 | #ifdef CONFIG_PM_RUNTIME |
Alan Stern | d5d4db7 | 2007-05-29 16:34:52 -0400 | [diff] [blame] | 2833 | cancel_work_sync(&hcd->wakeup_work); |
Alan Stern | 6b157c9 | 2007-03-13 16:37:30 -0400 | [diff] [blame] | 2834 | #endif |
| 2835 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 2836 | mutex_lock(&usb_bus_list_lock); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2837 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 2838 | mutex_unlock(&usb_bus_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2839 | |
Ming Lei | 94dfd7e | 2013-07-03 22:53:07 +0800 | [diff] [blame] | 2840 | /* |
| 2841 | * tasklet_kill() isn't needed here because: |
| 2842 | * - driver's disconnect() called from usb_disconnect() should |
| 2843 | * make sure its URBs are completed during the disconnect() |
| 2844 | * callback |
| 2845 | * |
| 2846 | * - it is too late to run complete() here since driver may have |
| 2847 | * been removed already now |
| 2848 | */ |
| 2849 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2850 | /* Prevent any more root-hub status calls from the timer. |
| 2851 | * The HCD might still restart the timer (if a port status change |
| 2852 | * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke |
| 2853 | * the hub_status_data() callback. |
| 2854 | */ |
| 2855 | hcd->rh_pollable = 0; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2856 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2857 | del_timer_sync(&hcd->rh_timer); |
| 2858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | hcd->driver->stop(hcd); |
| 2860 | hcd->state = HC_STATE_HALT; |
| 2861 | |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2862 | /* In case the HCD restarted the timer, stop it again. */ |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2863 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
Alan Stern | 1b42ae6 | 2007-03-13 11:10:52 -0400 | [diff] [blame] | 2864 | del_timer_sync(&hcd->rh_timer); |
| 2865 | |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2866 | if (usb_hcd_is_primary_hcd(hcd)) { |
Felipe Balbi | cd70469 | 2012-02-29 16:46:23 +0200 | [diff] [blame] | 2867 | if (hcd->irq > 0) |
Sarah Sharp | c563543 | 2010-10-28 15:40:26 -0700 | [diff] [blame] | 2868 | free_irq(hcd->irq, hcd); |
| 2869 | } |
Alan Stern | 6d88e67 | 2010-06-09 17:34:17 -0400 | [diff] [blame] | 2870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | usb_deregister_bus(&hcd->self); |
| 2872 | hcd_buffer_destroy(hcd); |
Valentine Barshak | 103e127 | 2013-12-04 01:42:21 +0400 | [diff] [blame] | 2873 | if (hcd->remove_phy && hcd->phy) { |
| 2874 | usb_phy_shutdown(hcd->phy); |
| 2875 | usb_put_phy(hcd->phy); |
| 2876 | hcd->phy = NULL; |
| 2877 | } |
Dan Williams | d8521af | 2014-05-20 18:08:28 -0700 | [diff] [blame^] | 2878 | |
| 2879 | usb_put_invalidate_rhdev(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2881 | EXPORT_SYMBOL_GPL(usb_remove_hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2882 | |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 2883 | void |
Matthias Beyer | 842c196 | 2013-10-05 18:02:06 +0200 | [diff] [blame] | 2884 | usb_hcd_platform_shutdown(struct platform_device *dev) |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 2885 | { |
| 2886 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
| 2887 | |
| 2888 | if (hcd->driver->shutdown) |
| 2889 | hcd->driver->shutdown(hcd); |
| 2890 | } |
Greg Kroah-Hartman | 782e70c | 2008-01-25 11:12:21 -0600 | [diff] [blame] | 2891 | EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); |
Aleksey Gorelov | 64a21d0 | 2006-08-08 17:24:08 -0700 | [diff] [blame] | 2892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | /*-------------------------------------------------------------------------*/ |
| 2894 | |
Pete Zaitcev | f150fa1 | 2008-11-13 21:31:21 -0700 | [diff] [blame] | 2895 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2896 | |
| 2897 | struct usb_mon_operations *mon_ops; |
| 2898 | |
| 2899 | /* |
| 2900 | * The registration is unlocked. |
| 2901 | * We do it this way because we do not want to lock in hot paths. |
| 2902 | * |
| 2903 | * Notice that the code is minimally error-proof. Because usbmon needs |
| 2904 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. |
| 2905 | */ |
Matthias Beyer | 1455735 | 2013-10-05 18:02:07 +0200 | [diff] [blame] | 2906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | int usb_mon_register (struct usb_mon_operations *ops) |
| 2908 | { |
| 2909 | |
| 2910 | if (mon_ops) |
| 2911 | return -EBUSY; |
| 2912 | |
| 2913 | mon_ops = ops; |
| 2914 | mb(); |
| 2915 | return 0; |
| 2916 | } |
| 2917 | EXPORT_SYMBOL_GPL (usb_mon_register); |
| 2918 | |
| 2919 | void usb_mon_deregister (void) |
| 2920 | { |
| 2921 | |
| 2922 | if (mon_ops == NULL) { |
| 2923 | printk(KERN_ERR "USB: monitor was not registered\n"); |
| 2924 | return; |
| 2925 | } |
| 2926 | mon_ops = NULL; |
| 2927 | mb(); |
| 2928 | } |
| 2929 | EXPORT_SYMBOL_GPL (usb_mon_deregister); |
| 2930 | |
Pete Zaitcev | f150fa1 | 2008-11-13 21:31:21 -0700 | [diff] [blame] | 2931 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |