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Commit | Line | Data |
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1da177e4 LT |
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 | |
14557359 | 9 | * |
1da177e4 LT |
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 | ||
b53d657d | 25 | #include <linux/bcd.h> |
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/version.h> | |
28 | #include <linux/kernel.h> | |
45681366 | 29 | #include <linux/sched/task_stack.h> |
1da177e4 LT |
30 | #include <linux/slab.h> |
31 | #include <linux/completion.h> | |
32 | #include <linux/utsname.h> | |
33 | #include <linux/mm.h> | |
34 | #include <asm/io.h> | |
1da177e4 LT |
35 | #include <linux/device.h> |
36 | #include <linux/dma-mapping.h> | |
4186ecf8 | 37 | #include <linux/mutex.h> |
1da177e4 LT |
38 | #include <asm/irq.h> |
39 | #include <asm/byteorder.h> | |
b3476675 | 40 | #include <asm/unaligned.h> |
64a21d02 | 41 | #include <linux/platform_device.h> |
6b157c9b | 42 | #include <linux/workqueue.h> |
da0aa716 | 43 | #include <linux/pm_runtime.h> |
059239ad | 44 | #include <linux/types.h> |
1da177e4 | 45 | |
00433254 | 46 | #include <linux/phy/phy.h> |
1da177e4 | 47 | #include <linux/usb.h> |
27729aad | 48 | #include <linux/usb/hcd.h> |
103e127d | 49 | #include <linux/usb/phy.h> |
35be784c | 50 | #include <linux/usb/otg.h> |
1da177e4 LT |
51 | |
52 | #include "usb.h" | |
1da177e4 LT |
53 | |
54 | ||
1da177e4 LT |
55 | /*-------------------------------------------------------------------------*/ |
56 | ||
57 | /* | |
58 | * USB Host Controller Driver framework | |
59 | * | |
60 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing | |
61 | * HCD-specific behaviors/bugs. | |
62 | * | |
63 | * This does error checks, tracks devices and urbs, and delegates to a | |
64 | * "hc_driver" only for code (and data) that really needs to know about | |
65 | * hardware differences. That includes root hub registers, i/o queues, | |
66 | * and so on ... but as little else as possible. | |
67 | * | |
68 | * Shared code includes most of the "root hub" code (these are emulated, | |
69 | * though each HC's hardware works differently) and PCI glue, plus request | |
70 | * tracking overhead. The HCD code should only block on spinlocks or on | |
71 | * hardware handshaking; blocking on software events (such as other kernel | |
72 | * threads releasing resources, or completing actions) is all generic. | |
73 | * | |
74 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", | |
75 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used | |
76 | * only by the hub driver ... and that neither should be seen or used by | |
77 | * usb client device drivers. | |
78 | * | |
79 | * Contributors of ideas or unattributed patches include: David Brownell, | |
80 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... | |
81 | * | |
82 | * HISTORY: | |
83 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some | |
84 | * associated cleanup. "usb_hcd" still != "usb_bus". | |
85 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. | |
86 | */ | |
87 | ||
88 | /*-------------------------------------------------------------------------*/ | |
89 | ||
9beeee65 AS |
90 | /* Keep track of which host controller drivers are loaded */ |
91 | unsigned long usb_hcds_loaded; | |
92 | EXPORT_SYMBOL_GPL(usb_hcds_loaded); | |
93 | ||
1da177e4 | 94 | /* host controllers we manage */ |
5363de75 HK |
95 | DEFINE_IDR (usb_bus_idr); |
96 | EXPORT_SYMBOL_GPL (usb_bus_idr); | |
1da177e4 LT |
97 | |
98 | /* used when allocating bus numbers */ | |
99 | #define USB_MAXBUS 64 | |
1da177e4 LT |
100 | |
101 | /* used when updating list of hcds */ | |
a4b5d606 HK |
102 | DEFINE_MUTEX(usb_bus_idr_lock); /* exported only for usbfs */ |
103 | EXPORT_SYMBOL_GPL (usb_bus_idr_lock); | |
1da177e4 LT |
104 | |
105 | /* used for controlling access to virtual root hubs */ | |
106 | static DEFINE_SPINLOCK(hcd_root_hub_lock); | |
107 | ||
809a58b8 AS |
108 | /* used when updating an endpoint's URB list */ |
109 | static DEFINE_SPINLOCK(hcd_urb_list_lock); | |
1da177e4 | 110 | |
cde217a5 AS |
111 | /* used to protect against unlinking URBs after the device is gone */ |
112 | static DEFINE_SPINLOCK(hcd_urb_unlink_lock); | |
113 | ||
1da177e4 LT |
114 | /* wait queue for synchronous unlinks */ |
115 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); | |
116 | ||
809a58b8 AS |
117 | static inline int is_root_hub(struct usb_device *udev) |
118 | { | |
119 | return (udev->parent == NULL); | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /*-------------------------------------------------------------------------*/ |
123 | ||
124 | /* | |
125 | * Sharable chunks of root hub code. | |
126 | */ | |
127 | ||
128 | /*-------------------------------------------------------------------------*/ | |
b53d657d SAS |
129 | #define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff)) |
130 | #define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff)) | |
1da177e4 | 131 | |
9508e3b7 MN |
132 | /* usb 3.1 root hub device descriptor */ |
133 | static const u8 usb31_rh_dev_descriptor[18] = { | |
134 | 0x12, /* __u8 bLength; */ | |
135 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ | |
136 | 0x10, 0x03, /* __le16 bcdUSB; v3.1 */ | |
137 | ||
138 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
139 | 0x00, /* __u8 bDeviceSubClass; */ | |
140 | 0x03, /* __u8 bDeviceProtocol; USB 3 hub */ | |
141 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ | |
142 | ||
143 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ | |
144 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ | |
145 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ | |
146 | ||
147 | 0x03, /* __u8 iManufacturer; */ | |
148 | 0x02, /* __u8 iProduct; */ | |
149 | 0x01, /* __u8 iSerialNumber; */ | |
150 | 0x01 /* __u8 bNumConfigurations; */ | |
151 | }; | |
152 | ||
d2e9b4d6 SS |
153 | /* usb 3.0 root hub device descriptor */ |
154 | static const u8 usb3_rh_dev_descriptor[18] = { | |
155 | 0x12, /* __u8 bLength; */ | |
d491fe75 | 156 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
d2e9b4d6 SS |
157 | 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ |
158 | ||
159 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
160 | 0x00, /* __u8 bDeviceSubClass; */ | |
161 | 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ | |
162 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ | |
163 | ||
bfb8bfad | 164 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
cd780694 | 165 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ |
d2e9b4d6 SS |
166 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
167 | ||
168 | 0x03, /* __u8 iManufacturer; */ | |
169 | 0x02, /* __u8 iProduct; */ | |
170 | 0x01, /* __u8 iSerialNumber; */ | |
171 | 0x01 /* __u8 bNumConfigurations; */ | |
172 | }; | |
173 | ||
1a81f881 TP |
174 | /* usb 2.5 (wireless USB 1.0) root hub device descriptor */ |
175 | static const u8 usb25_rh_dev_descriptor[18] = { | |
176 | 0x12, /* __u8 bLength; */ | |
d491fe75 | 177 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
1a81f881 TP |
178 | 0x50, 0x02, /* __le16 bcdUSB; v2.5 */ |
179 | ||
180 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
181 | 0x00, /* __u8 bDeviceSubClass; */ | |
182 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ | |
183 | 0xFF, /* __u8 bMaxPacketSize0; always 0xFF (WUSB Spec 7.4.1). */ | |
184 | ||
185 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ | |
186 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ | |
187 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ | |
188 | ||
189 | 0x03, /* __u8 iManufacturer; */ | |
190 | 0x02, /* __u8 iProduct; */ | |
191 | 0x01, /* __u8 iSerialNumber; */ | |
192 | 0x01 /* __u8 bNumConfigurations; */ | |
193 | }; | |
194 | ||
1da177e4 | 195 | /* usb 2.0 root hub device descriptor */ |
14557359 | 196 | static const u8 usb2_rh_dev_descriptor[18] = { |
1da177e4 | 197 | 0x12, /* __u8 bLength; */ |
d491fe75 | 198 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
1da177e4 LT |
199 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ |
200 | ||
201 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
202 | 0x00, /* __u8 bDeviceSubClass; */ | |
7329e211 | 203 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
16f16d11 | 204 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 205 | |
bfb8bfad | 206 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
667d691e | 207 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
1da177e4 LT |
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 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ | |
217 | ||
218 | /* usb 1.1 root hub device descriptor */ | |
14557359 | 219 | static const u8 usb11_rh_dev_descriptor[18] = { |
1da177e4 | 220 | 0x12, /* __u8 bLength; */ |
d491fe75 | 221 | USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ |
1da177e4 LT |
222 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ |
223 | ||
224 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
225 | 0x00, /* __u8 bDeviceSubClass; */ | |
226 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ | |
16f16d11 | 227 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 228 | |
bfb8bfad | 229 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
667d691e | 230 | 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ |
1da177e4 LT |
231 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
232 | ||
233 | 0x03, /* __u8 iManufacturer; */ | |
234 | 0x02, /* __u8 iProduct; */ | |
235 | 0x01, /* __u8 iSerialNumber; */ | |
236 | 0x01 /* __u8 bNumConfigurations; */ | |
237 | }; | |
238 | ||
239 | ||
240 | /*-------------------------------------------------------------------------*/ | |
241 | ||
242 | /* Configuration descriptors for our root hubs */ | |
243 | ||
14557359 | 244 | static const u8 fs_rh_config_descriptor[] = { |
1da177e4 LT |
245 | |
246 | /* one configuration */ | |
247 | 0x09, /* __u8 bLength; */ | |
d491fe75 | 248 | USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ |
1da177e4 LT |
249 | 0x19, 0x00, /* __le16 wTotalLength; */ |
250 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
251 | 0x01, /* __u8 bConfigurationValue; */ | |
252 | 0x00, /* __u8 iConfiguration; */ | |
14557359 | 253 | 0xc0, /* __u8 bmAttributes; |
1da177e4 LT |
254 | Bit 7: must be set, |
255 | 6: Self-powered, | |
256 | 5: Remote wakeup, | |
257 | 4..0: resvd */ | |
258 | 0x00, /* __u8 MaxPower; */ | |
14557359 | 259 | |
1da177e4 LT |
260 | /* USB 1.1: |
261 | * USB 2.0, single TT organization (mandatory): | |
262 | * one interface, protocol 0 | |
263 | * | |
264 | * USB 2.0, multiple TT organization (optional): | |
265 | * two interfaces, protocols 1 (like single TT) | |
266 | * and 2 (multiple TT mode) ... config is | |
267 | * sometimes settable | |
268 | * NOT IMPLEMENTED | |
269 | */ | |
270 | ||
271 | /* one interface */ | |
272 | 0x09, /* __u8 if_bLength; */ | |
d491fe75 | 273 | USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ |
1da177e4 LT |
274 | 0x00, /* __u8 if_bInterfaceNumber; */ |
275 | 0x00, /* __u8 if_bAlternateSetting; */ | |
276 | 0x01, /* __u8 if_bNumEndpoints; */ | |
277 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
278 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
279 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
280 | 0x00, /* __u8 if_iInterface; */ | |
14557359 | 281 | |
1da177e4 LT |
282 | /* one endpoint (status change endpoint) */ |
283 | 0x07, /* __u8 ep_bLength; */ | |
d491fe75 | 284 | USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ |
1da177e4 | 285 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
14557359 MB |
286 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
287 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ | |
1da177e4 LT |
288 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ |
289 | }; | |
290 | ||
14557359 | 291 | static const u8 hs_rh_config_descriptor[] = { |
1da177e4 LT |
292 | |
293 | /* one configuration */ | |
294 | 0x09, /* __u8 bLength; */ | |
d491fe75 | 295 | USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ |
1da177e4 LT |
296 | 0x19, 0x00, /* __le16 wTotalLength; */ |
297 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
298 | 0x01, /* __u8 bConfigurationValue; */ | |
299 | 0x00, /* __u8 iConfiguration; */ | |
14557359 | 300 | 0xc0, /* __u8 bmAttributes; |
1da177e4 LT |
301 | Bit 7: must be set, |
302 | 6: Self-powered, | |
303 | 5: Remote wakeup, | |
304 | 4..0: resvd */ | |
305 | 0x00, /* __u8 MaxPower; */ | |
14557359 | 306 | |
1da177e4 LT |
307 | /* USB 1.1: |
308 | * USB 2.0, single TT organization (mandatory): | |
309 | * one interface, protocol 0 | |
310 | * | |
311 | * USB 2.0, multiple TT organization (optional): | |
312 | * two interfaces, protocols 1 (like single TT) | |
313 | * and 2 (multiple TT mode) ... config is | |
314 | * sometimes settable | |
315 | * NOT IMPLEMENTED | |
316 | */ | |
317 | ||
318 | /* one interface */ | |
319 | 0x09, /* __u8 if_bLength; */ | |
d491fe75 | 320 | USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ |
1da177e4 LT |
321 | 0x00, /* __u8 if_bInterfaceNumber; */ |
322 | 0x00, /* __u8 if_bAlternateSetting; */ | |
323 | 0x01, /* __u8 if_bNumEndpoints; */ | |
324 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
325 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
326 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
327 | 0x00, /* __u8 if_iInterface; */ | |
14557359 | 328 | |
1da177e4 LT |
329 | /* one endpoint (status change endpoint) */ |
330 | 0x07, /* __u8 ep_bLength; */ | |
d491fe75 | 331 | USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ |
1da177e4 | 332 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
14557359 | 333 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
88fafff9 | 334 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
335 | * see hub.c:hub_configure() for details. */ | |
336 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
1da177e4 LT |
337 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
338 | }; | |
339 | ||
d2e9b4d6 SS |
340 | static const u8 ss_rh_config_descriptor[] = { |
341 | /* one configuration */ | |
342 | 0x09, /* __u8 bLength; */ | |
d491fe75 | 343 | USB_DT_CONFIG, /* __u8 bDescriptorType; Configuration */ |
22c6a35d | 344 | 0x1f, 0x00, /* __le16 wTotalLength; */ |
d2e9b4d6 SS |
345 | 0x01, /* __u8 bNumInterfaces; (1) */ |
346 | 0x01, /* __u8 bConfigurationValue; */ | |
347 | 0x00, /* __u8 iConfiguration; */ | |
348 | 0xc0, /* __u8 bmAttributes; | |
349 | Bit 7: must be set, | |
350 | 6: Self-powered, | |
351 | 5: Remote wakeup, | |
352 | 4..0: resvd */ | |
353 | 0x00, /* __u8 MaxPower; */ | |
354 | ||
355 | /* one interface */ | |
356 | 0x09, /* __u8 if_bLength; */ | |
d491fe75 | 357 | USB_DT_INTERFACE, /* __u8 if_bDescriptorType; Interface */ |
d2e9b4d6 SS |
358 | 0x00, /* __u8 if_bInterfaceNumber; */ |
359 | 0x00, /* __u8 if_bAlternateSetting; */ | |
360 | 0x01, /* __u8 if_bNumEndpoints; */ | |
361 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
362 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
363 | 0x00, /* __u8 if_bInterfaceProtocol; */ | |
364 | 0x00, /* __u8 if_iInterface; */ | |
365 | ||
366 | /* one endpoint (status change endpoint) */ | |
367 | 0x07, /* __u8 ep_bLength; */ | |
d491fe75 | 368 | USB_DT_ENDPOINT, /* __u8 ep_bDescriptorType; Endpoint */ |
d2e9b4d6 SS |
369 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ |
370 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
371 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) | |
372 | * see hub.c:hub_configure() for details. */ | |
373 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
22c6a35d SS |
374 | 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
375 | ||
376 | /* one SuperSpeed endpoint companion descriptor */ | |
377 | 0x06, /* __u8 ss_bLength */ | |
d491fe75 SS |
378 | USB_DT_SS_ENDPOINT_COMP, /* __u8 ss_bDescriptorType; SuperSpeed EP */ |
379 | /* Companion */ | |
22c6a35d SS |
380 | 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ |
381 | 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ | |
382 | 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ | |
d2e9b4d6 SS |
383 | }; |
384 | ||
c4fc2342 CDH |
385 | /* authorized_default behaviour: |
386 | * -1 is authorized for all devices except wireless (old behaviour) | |
387 | * 0 is unauthorized for all devices | |
388 | * 1 is authorized for all devices | |
389 | */ | |
390 | static int authorized_default = -1; | |
391 | module_param(authorized_default, int, S_IRUGO|S_IWUSR); | |
392 | MODULE_PARM_DESC(authorized_default, | |
393 | "Default USB device authorization: 0 is not authorized, 1 is " | |
394 | "authorized, -1 is authorized except for wireless USB (default, " | |
395 | "old behaviour"); | |
1da177e4 LT |
396 | /*-------------------------------------------------------------------------*/ |
397 | ||
392ca68b GS |
398 | /** |
399 | * ascii2desc() - Helper routine for producing UTF-16LE string descriptors | |
400 | * @s: Null-terminated ASCII (actually ISO-8859-1) string | |
401 | * @buf: Buffer for USB string descriptor (header + UTF-16LE) | |
402 | * @len: Length (in bytes; may be odd) of descriptor buffer. | |
403 | * | |
626f090c YB |
404 | * Return: The number of bytes filled in: 2 + 2*strlen(s) or @len, |
405 | * whichever is less. | |
392ca68b | 406 | * |
626f090c | 407 | * Note: |
392ca68b GS |
408 | * USB String descriptors can contain at most 126 characters; input |
409 | * strings longer than that are truncated. | |
1da177e4 | 410 | */ |
392ca68b GS |
411 | static unsigned |
412 | ascii2desc(char const *s, u8 *buf, unsigned len) | |
1da177e4 | 413 | { |
392ca68b GS |
414 | unsigned n, t = 2 + 2*strlen(s); |
415 | ||
416 | if (t > 254) | |
417 | t = 254; /* Longest possible UTF string descriptor */ | |
418 | if (len > t) | |
419 | len = t; | |
420 | ||
421 | t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ | |
422 | ||
423 | n = len; | |
424 | while (n--) { | |
425 | *buf++ = t; | |
426 | if (!n--) | |
427 | break; | |
428 | *buf++ = t >> 8; | |
429 | t = (unsigned char)*s++; | |
1da177e4 | 430 | } |
392ca68b | 431 | return len; |
1da177e4 LT |
432 | } |
433 | ||
392ca68b GS |
434 | /** |
435 | * rh_string() - provides string descriptors for root hub | |
436 | * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) | |
1da177e4 | 437 | * @hcd: the host controller for this root hub |
392ca68b GS |
438 | * @data: buffer for output packet |
439 | * @len: length of the provided buffer | |
1da177e4 LT |
440 | * |
441 | * Produces either a manufacturer, product or serial number string for the | |
442 | * virtual root hub device. | |
626f090c YB |
443 | * |
444 | * Return: The number of bytes filled in: the length of the descriptor or | |
392ca68b | 445 | * of the provided buffer, whichever is less. |
1da177e4 | 446 | */ |
392ca68b GS |
447 | static unsigned |
448 | rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) | |
71d2718f | 449 | { |
392ca68b GS |
450 | char buf[100]; |
451 | char const *s; | |
452 | static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; | |
1da177e4 | 453 | |
048cb21c | 454 | /* language ids */ |
392ca68b GS |
455 | switch (id) { |
456 | case 0: | |
457 | /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ | |
458 | /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ | |
459 | if (len > 4) | |
460 | len = 4; | |
461 | memcpy(data, langids, len); | |
1da177e4 | 462 | return len; |
392ca68b GS |
463 | case 1: |
464 | /* Serial number */ | |
465 | s = hcd->self.bus_name; | |
466 | break; | |
467 | case 2: | |
468 | /* Product name */ | |
469 | s = hcd->product_desc; | |
470 | break; | |
471 | case 3: | |
472 | /* Manufacturer */ | |
96b644bd SH |
473 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
474 | init_utsname()->release, hcd->driver->description); | |
392ca68b GS |
475 | s = buf; |
476 | break; | |
1da177e4 | 477 | default: |
392ca68b GS |
478 | /* Can't happen; caller guarantees it */ |
479 | return 0; | |
1da177e4 | 480 | } |
392ca68b GS |
481 | |
482 | return ascii2desc(s, data, len); | |
1da177e4 LT |
483 | } |
484 | ||
485 | ||
486 | /* Root hub control transfers execute synchronously */ | |
487 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) | |
488 | { | |
489 | struct usb_ctrlrequest *cmd; | |
14557359 | 490 | u16 typeReq, wValue, wIndex, wLength; |
1da177e4 | 491 | u8 *ubuf = urb->transfer_buffer; |
71d2718f | 492 | unsigned len = 0; |
e9df41c5 | 493 | int status; |
7329e211 AS |
494 | u8 patch_wakeup = 0; |
495 | u8 patch_protocol = 0; | |
e57e780b SS |
496 | u16 tbuf_size; |
497 | u8 *tbuf = NULL; | |
498 | const u8 *bufp; | |
1da177e4 | 499 | |
9439eb94 AS |
500 | might_sleep(); |
501 | ||
e9df41c5 AS |
502 | spin_lock_irq(&hcd_root_hub_lock); |
503 | status = usb_hcd_link_urb_to_ep(hcd, urb); | |
504 | spin_unlock_irq(&hcd_root_hub_lock); | |
505 | if (status) | |
506 | return status; | |
b0d9efba | 507 | urb->hcpriv = hcd; /* Indicate it's queued */ |
e9df41c5 | 508 | |
1da177e4 LT |
509 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; |
510 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; | |
511 | wValue = le16_to_cpu (cmd->wValue); | |
512 | wIndex = le16_to_cpu (cmd->wIndex); | |
513 | wLength = le16_to_cpu (cmd->wLength); | |
514 | ||
515 | if (wLength > urb->transfer_buffer_length) | |
516 | goto error; | |
517 | ||
e57e780b SS |
518 | /* |
519 | * tbuf should be at least as big as the | |
520 | * USB hub descriptor. | |
521 | */ | |
522 | tbuf_size = max_t(u16, sizeof(struct usb_hub_descriptor), wLength); | |
523 | tbuf = kzalloc(tbuf_size, GFP_KERNEL); | |
16336820 AS |
524 | if (!tbuf) { |
525 | status = -ENOMEM; | |
526 | goto err_alloc; | |
527 | } | |
e57e780b SS |
528 | |
529 | bufp = tbuf; | |
530 | ||
531 | ||
1da177e4 LT |
532 | urb->actual_length = 0; |
533 | switch (typeReq) { | |
534 | ||
535 | /* DEVICE REQUESTS */ | |
536 | ||
fb669cc0 DB |
537 | /* The root hub's remote wakeup enable bit is implemented using |
538 | * driver model wakeup flags. If this system supports wakeup | |
539 | * through USB, userspace may change the default "allow wakeup" | |
540 | * policy through sysfs or these calls. | |
541 | * | |
542 | * Most root hubs support wakeup from downstream devices, for | |
543 | * runtime power management (disabling USB clocks and reducing | |
544 | * VBUS power usage). However, not all of them do so; silicon, | |
545 | * board, and BIOS bugs here are not uncommon, so these can't | |
546 | * be treated quite like external hubs. | |
547 | * | |
548 | * Likewise, not all root hubs will pass wakeup events upstream, | |
549 | * to wake up the whole system. So don't assume root hub and | |
550 | * controller capabilities are identical. | |
551 | */ | |
552 | ||
1da177e4 | 553 | case DeviceRequest | USB_REQ_GET_STATUS: |
14557359 | 554 | tbuf[0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
fb669cc0 | 555 | << USB_DEVICE_REMOTE_WAKEUP) |
1da177e4 | 556 | | (1 << USB_DEVICE_SELF_POWERED); |
14557359 | 557 | tbuf[1] = 0; |
1da177e4 LT |
558 | len = 2; |
559 | break; | |
560 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: | |
561 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) | |
fb669cc0 | 562 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
1da177e4 LT |
563 | else |
564 | goto error; | |
565 | break; | |
566 | case DeviceOutRequest | USB_REQ_SET_FEATURE: | |
fb669cc0 DB |
567 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
568 | && wValue == USB_DEVICE_REMOTE_WAKEUP) | |
569 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); | |
1da177e4 LT |
570 | else |
571 | goto error; | |
572 | break; | |
573 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: | |
14557359 | 574 | tbuf[0] = 1; |
1da177e4 LT |
575 | len = 1; |
576 | /* FALLTHROUGH */ | |
577 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: | |
578 | break; | |
579 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
580 | switch (wValue & 0xff00) { | |
581 | case USB_DT_DEVICE << 8: | |
83de4b2b | 582 | switch (hcd->speed) { |
71175225 | 583 | case HCD_USB31: |
9508e3b7 MN |
584 | bufp = usb31_rh_dev_descriptor; |
585 | break; | |
7dd19e69 | 586 | case HCD_USB3: |
d2e9b4d6 | 587 | bufp = usb3_rh_dev_descriptor; |
7dd19e69 | 588 | break; |
1a81f881 TP |
589 | case HCD_USB25: |
590 | bufp = usb25_rh_dev_descriptor; | |
591 | break; | |
7dd19e69 | 592 | case HCD_USB2: |
1da177e4 | 593 | bufp = usb2_rh_dev_descriptor; |
7dd19e69 VM |
594 | break; |
595 | case HCD_USB11: | |
1da177e4 | 596 | bufp = usb11_rh_dev_descriptor; |
7dd19e69 VM |
597 | break; |
598 | default: | |
1da177e4 | 599 | goto error; |
7dd19e69 | 600 | } |
1da177e4 | 601 | len = 18; |
7329e211 AS |
602 | if (hcd->has_tt) |
603 | patch_protocol = 1; | |
1da177e4 LT |
604 | break; |
605 | case USB_DT_CONFIG << 8: | |
83de4b2b | 606 | switch (hcd->speed) { |
71175225 | 607 | case HCD_USB31: |
7dd19e69 | 608 | case HCD_USB3: |
d2e9b4d6 SS |
609 | bufp = ss_rh_config_descriptor; |
610 | len = sizeof ss_rh_config_descriptor; | |
7dd19e69 | 611 | break; |
1a81f881 | 612 | case HCD_USB25: |
7dd19e69 | 613 | case HCD_USB2: |
1da177e4 LT |
614 | bufp = hs_rh_config_descriptor; |
615 | len = sizeof hs_rh_config_descriptor; | |
7dd19e69 VM |
616 | break; |
617 | case HCD_USB11: | |
1da177e4 LT |
618 | bufp = fs_rh_config_descriptor; |
619 | len = sizeof fs_rh_config_descriptor; | |
7dd19e69 VM |
620 | break; |
621 | default: | |
622 | goto error; | |
1da177e4 | 623 | } |
fb669cc0 | 624 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
625 | patch_wakeup = 1; |
626 | break; | |
627 | case USB_DT_STRING << 8: | |
71d2718f RK |
628 | if ((wValue & 0xff) < 4) |
629 | urb->actual_length = rh_string(wValue & 0xff, | |
630 | hcd, ubuf, wLength); | |
631 | else /* unsupported IDs --> "protocol stall" */ | |
1da177e4 | 632 | goto error; |
1da177e4 | 633 | break; |
48e82361 SS |
634 | case USB_DT_BOS << 8: |
635 | goto nongeneric; | |
1da177e4 LT |
636 | default: |
637 | goto error; | |
638 | } | |
639 | break; | |
640 | case DeviceRequest | USB_REQ_GET_INTERFACE: | |
14557359 | 641 | tbuf[0] = 0; |
1da177e4 LT |
642 | len = 1; |
643 | /* FALLTHROUGH */ | |
644 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: | |
645 | break; | |
646 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: | |
048cb21c | 647 | /* wValue == urb->dev->devaddr */ |
1da177e4 LT |
648 | dev_dbg (hcd->self.controller, "root hub device address %d\n", |
649 | wValue); | |
650 | break; | |
651 | ||
652 | /* INTERFACE REQUESTS (no defined feature/status flags) */ | |
653 | ||
654 | /* ENDPOINT REQUESTS */ | |
655 | ||
656 | case EndpointRequest | USB_REQ_GET_STATUS: | |
048cb21c | 657 | /* ENDPOINT_HALT flag */ |
14557359 MB |
658 | tbuf[0] = 0; |
659 | tbuf[1] = 0; | |
1da177e4 LT |
660 | len = 2; |
661 | /* FALLTHROUGH */ | |
662 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: | |
663 | case EndpointOutRequest | USB_REQ_SET_FEATURE: | |
664 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); | |
665 | break; | |
666 | ||
667 | /* CLASS REQUESTS (and errors) */ | |
668 | ||
669 | default: | |
48e82361 | 670 | nongeneric: |
1da177e4 | 671 | /* non-generic request */ |
b13296c6 DB |
672 | switch (typeReq) { |
673 | case GetHubStatus: | |
b13296c6 DB |
674 | len = 4; |
675 | break; | |
0cdd49a1 MN |
676 | case GetPortStatus: |
677 | if (wValue == HUB_PORT_STATUS) | |
678 | len = 4; | |
679 | else | |
680 | /* other port status types return 8 bytes */ | |
681 | len = 8; | |
682 | break; | |
b13296c6 DB |
683 | case GetHubDescriptor: |
684 | len = sizeof (struct usb_hub_descriptor); | |
685 | break; | |
48e82361 SS |
686 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
687 | /* len is returned by hub_control */ | |
688 | break; | |
1da177e4 | 689 | } |
b13296c6 DB |
690 | status = hcd->driver->hub_control (hcd, |
691 | typeReq, wValue, wIndex, | |
692 | tbuf, wLength); | |
d2123fd9 LT |
693 | |
694 | if (typeReq == GetHubDescriptor) | |
695 | usb_hub_adjust_deviceremovable(hcd->self.root_hub, | |
696 | (struct usb_hub_descriptor *)tbuf); | |
1da177e4 LT |
697 | break; |
698 | error: | |
699 | /* "protocol stall" on error */ | |
700 | status = -EPIPE; | |
701 | } | |
702 | ||
48e82361 | 703 | if (status < 0) { |
1da177e4 LT |
704 | len = 0; |
705 | if (status != -EPIPE) { | |
706 | dev_dbg (hcd->self.controller, | |
707 | "CTRL: TypeReq=0x%x val=0x%x " | |
708 | "idx=0x%x len=%d ==> %d\n", | |
709 | typeReq, wValue, wIndex, | |
b13296c6 | 710 | wLength, status); |
1da177e4 | 711 | } |
48e82361 SS |
712 | } else if (status > 0) { |
713 | /* hub_control may return the length of data copied. */ | |
714 | len = status; | |
715 | status = 0; | |
1da177e4 LT |
716 | } |
717 | if (len) { | |
718 | if (urb->transfer_buffer_length < len) | |
719 | len = urb->transfer_buffer_length; | |
720 | urb->actual_length = len; | |
048cb21c | 721 | /* always USB_DIR_IN, toward host */ |
1da177e4 LT |
722 | memcpy (ubuf, bufp, len); |
723 | ||
724 | /* report whether RH hardware supports remote wakeup */ | |
725 | if (patch_wakeup && | |
726 | len > offsetof (struct usb_config_descriptor, | |
727 | bmAttributes)) | |
728 | ((struct usb_config_descriptor *)ubuf)->bmAttributes | |
729 | |= USB_CONFIG_ATT_WAKEUP; | |
7329e211 AS |
730 | |
731 | /* report whether RH hardware has an integrated TT */ | |
732 | if (patch_protocol && | |
733 | len > offsetof(struct usb_device_descriptor, | |
734 | bDeviceProtocol)) | |
735 | ((struct usb_device_descriptor *) ubuf)-> | |
7bf01185 | 736 | bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT; |
1da177e4 LT |
737 | } |
738 | ||
e57e780b | 739 | kfree(tbuf); |
16336820 | 740 | err_alloc: |
e57e780b | 741 | |
1da177e4 | 742 | /* any errors get returned through the urb completion */ |
9439eb94 | 743 | spin_lock_irq(&hcd_root_hub_lock); |
e9df41c5 | 744 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4a00027d | 745 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 | 746 | spin_unlock_irq(&hcd_root_hub_lock); |
1da177e4 LT |
747 | return 0; |
748 | } | |
749 | ||
750 | /*-------------------------------------------------------------------------*/ | |
751 | ||
752 | /* | |
d5926ae7 AS |
753 | * Root Hub interrupt transfers are polled using a timer if the |
754 | * driver requests it; otherwise the driver is responsible for | |
755 | * calling usb_hcd_poll_rh_status() when an event occurs. | |
1da177e4 | 756 | * |
d5926ae7 AS |
757 | * Completions are called in_interrupt(), but they may or may not |
758 | * be in_irq(). | |
1da177e4 | 759 | */ |
d5926ae7 AS |
760 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
761 | { | |
762 | struct urb *urb; | |
763 | int length; | |
764 | unsigned long flags; | |
ad361c98 | 765 | char buffer[6]; /* Any root hubs with > 31 ports? */ |
1da177e4 | 766 | |
6d88e679 | 767 | if (unlikely(!hcd->rh_pollable)) |
1b42ae6d | 768 | return; |
d5926ae7 AS |
769 | if (!hcd->uses_new_polling && !hcd->status_urb) |
770 | return; | |
1da177e4 | 771 | |
d5926ae7 AS |
772 | length = hcd->driver->hub_status_data(hcd, buffer); |
773 | if (length > 0) { | |
1da177e4 | 774 | |
d5926ae7 | 775 | /* try to complete the status urb */ |
9439eb94 | 776 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
d5926ae7 AS |
777 | urb = hcd->status_urb; |
778 | if (urb) { | |
541c7d43 | 779 | clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 780 | hcd->status_urb = NULL; |
e9df41c5 AS |
781 | urb->actual_length = length; |
782 | memcpy(urb->transfer_buffer, buffer, length); | |
9439eb94 | 783 | |
e9df41c5 | 784 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4a00027d | 785 | usb_hcd_giveback_urb(hcd, urb, 0); |
e9df41c5 | 786 | } else { |
d5926ae7 | 787 | length = 0; |
541c7d43 | 788 | set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 789 | } |
9439eb94 | 790 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
1da177e4 LT |
791 | } |
792 | ||
d5926ae7 | 793 | /* The USB 2.0 spec says 256 ms. This is close enough and won't |
01cd0819 AV |
794 | * exceed that limit if HZ is 100. The math is more clunky than |
795 | * maybe expected, this is to make sure that all timers for USB devices | |
25985edc | 796 | * fire at the same time to give the CPU a break in between */ |
541c7d43 | 797 | if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : |
d5926ae7 | 798 | (length == 0 && hcd->status_urb != NULL)) |
01cd0819 | 799 | mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
1da177e4 | 800 | } |
d5926ae7 | 801 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
1da177e4 LT |
802 | |
803 | /* timer callback */ | |
d5926ae7 AS |
804 | static void rh_timer_func (unsigned long _hcd) |
805 | { | |
806 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); | |
807 | } | |
808 | ||
809 | /*-------------------------------------------------------------------------*/ | |
1da177e4 | 810 | |
d5926ae7 | 811 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
1da177e4 | 812 | { |
d5926ae7 | 813 | int retval; |
1da177e4 | 814 | unsigned long flags; |
71d2718f | 815 | unsigned len = 1 + (urb->dev->maxchild / 8); |
1da177e4 | 816 | |
d5926ae7 | 817 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
e9df41c5 | 818 | if (hcd->status_urb || urb->transfer_buffer_length < len) { |
d5926ae7 AS |
819 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); |
820 | retval = -EINVAL; | |
e9df41c5 AS |
821 | goto done; |
822 | } | |
1da177e4 | 823 | |
e9df41c5 AS |
824 | retval = usb_hcd_link_urb_to_ep(hcd, urb); |
825 | if (retval) | |
826 | goto done; | |
1da177e4 | 827 | |
e9df41c5 AS |
828 | hcd->status_urb = urb; |
829 | urb->hcpriv = hcd; /* indicate it's queued */ | |
830 | if (!hcd->uses_new_polling) | |
831 | mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); | |
832 | ||
833 | /* If a status change has already occurred, report it ASAP */ | |
541c7d43 | 834 | else if (HCD_POLL_PENDING(hcd)) |
e9df41c5 AS |
835 | mod_timer(&hcd->rh_timer, jiffies); |
836 | retval = 0; | |
837 | done: | |
d5926ae7 AS |
838 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
839 | return retval; | |
1da177e4 LT |
840 | } |
841 | ||
1da177e4 LT |
842 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
843 | { | |
5e60a161 | 844 | if (usb_endpoint_xfer_int(&urb->ep->desc)) |
d5926ae7 | 845 | return rh_queue_status (hcd, urb); |
5e60a161 | 846 | if (usb_endpoint_xfer_control(&urb->ep->desc)) |
1da177e4 | 847 | return rh_call_control (hcd, urb); |
d5926ae7 | 848 | return -EINVAL; |
1da177e4 LT |
849 | } |
850 | ||
851 | /*-------------------------------------------------------------------------*/ | |
852 | ||
455b25fb AS |
853 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
854 | * since these URBs always execute synchronously. | |
d5926ae7 | 855 | */ |
e9df41c5 | 856 | static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 857 | { |
455b25fb | 858 | unsigned long flags; |
e9df41c5 | 859 | int rc; |
1da177e4 | 860 | |
9439eb94 | 861 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
e9df41c5 AS |
862 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
863 | if (rc) | |
864 | goto done; | |
865 | ||
5e60a161 | 866 | if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ |
455b25fb | 867 | ; /* Do nothing */ |
d5926ae7 AS |
868 | |
869 | } else { /* Status URB */ | |
870 | if (!hcd->uses_new_polling) | |
455b25fb | 871 | del_timer (&hcd->rh_timer); |
d5926ae7 AS |
872 | if (urb == hcd->status_urb) { |
873 | hcd->status_urb = NULL; | |
e9df41c5 | 874 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4a00027d | 875 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 AS |
876 | } |
877 | } | |
e9df41c5 | 878 | done: |
9439eb94 | 879 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
e9df41c5 | 880 | return rc; |
1da177e4 LT |
881 | } |
882 | ||
5234ce1b IPG |
883 | |
884 | ||
885 | /* | |
886 | * Show & store the current value of authorized_default | |
887 | */ | |
d03f254f GKH |
888 | static ssize_t authorized_default_show(struct device *dev, |
889 | struct device_attribute *attr, char *buf) | |
5234ce1b IPG |
890 | { |
891 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
892 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
ff8e2c56 | 893 | struct usb_hcd *hcd; |
5234ce1b | 894 | |
ff8e2c56 SK |
895 | hcd = bus_to_hcd(usb_bus); |
896 | return snprintf(buf, PAGE_SIZE, "%u\n", !!HCD_DEV_AUTHORIZED(hcd)); | |
5234ce1b IPG |
897 | } |
898 | ||
d03f254f GKH |
899 | static ssize_t authorized_default_store(struct device *dev, |
900 | struct device_attribute *attr, | |
901 | const char *buf, size_t size) | |
5234ce1b IPG |
902 | { |
903 | ssize_t result; | |
904 | unsigned val; | |
905 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
906 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
ff8e2c56 | 907 | struct usb_hcd *hcd; |
5234ce1b | 908 | |
ff8e2c56 | 909 | hcd = bus_to_hcd(usb_bus); |
5234ce1b IPG |
910 | result = sscanf(buf, "%u\n", &val); |
911 | if (result == 1) { | |
ff8e2c56 SK |
912 | if (val) |
913 | set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); | |
914 | else | |
915 | clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); | |
916 | ||
5234ce1b | 917 | result = size; |
d1ddb0a6 | 918 | } else { |
5234ce1b | 919 | result = -EINVAL; |
d1ddb0a6 | 920 | } |
5234ce1b IPG |
921 | return result; |
922 | } | |
d03f254f | 923 | static DEVICE_ATTR_RW(authorized_default); |
5234ce1b | 924 | |
6b2bd3c8 SK |
925 | /* |
926 | * interface_authorized_default_show - show default authorization status | |
927 | * for USB interfaces | |
928 | * | |
929 | * note: interface_authorized_default is the default value | |
930 | * for initializing the authorized attribute of interfaces | |
931 | */ | |
932 | static ssize_t interface_authorized_default_show(struct device *dev, | |
933 | struct device_attribute *attr, char *buf) | |
934 | { | |
935 | struct usb_device *usb_dev = to_usb_device(dev); | |
936 | struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus); | |
937 | ||
938 | return sprintf(buf, "%u\n", !!HCD_INTF_AUTHORIZED(hcd)); | |
939 | } | |
940 | ||
941 | /* | |
942 | * interface_authorized_default_store - store default authorization status | |
943 | * for USB interfaces | |
944 | * | |
945 | * note: interface_authorized_default is the default value | |
946 | * for initializing the authorized attribute of interfaces | |
947 | */ | |
948 | static ssize_t interface_authorized_default_store(struct device *dev, | |
949 | struct device_attribute *attr, const char *buf, size_t count) | |
950 | { | |
951 | struct usb_device *usb_dev = to_usb_device(dev); | |
952 | struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus); | |
953 | int rc = count; | |
954 | bool val; | |
955 | ||
956 | if (strtobool(buf, &val) != 0) | |
957 | return -EINVAL; | |
958 | ||
959 | if (val) | |
960 | set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags); | |
961 | else | |
962 | clear_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags); | |
963 | ||
964 | return rc; | |
965 | } | |
966 | static DEVICE_ATTR_RW(interface_authorized_default); | |
967 | ||
5234ce1b IPG |
968 | /* Group all the USB bus attributes */ |
969 | static struct attribute *usb_bus_attrs[] = { | |
970 | &dev_attr_authorized_default.attr, | |
6b2bd3c8 | 971 | &dev_attr_interface_authorized_default.attr, |
5234ce1b IPG |
972 | NULL, |
973 | }; | |
974 | ||
975 | static struct attribute_group usb_bus_attr_group = { | |
976 | .name = NULL, /* we want them in the same directory */ | |
977 | .attrs = usb_bus_attrs, | |
978 | }; | |
979 | ||
980 | ||
981 | ||
1da177e4 LT |
982 | /*-------------------------------------------------------------------------*/ |
983 | ||
1da177e4 LT |
984 | /** |
985 | * usb_bus_init - shared initialization code | |
986 | * @bus: the bus structure being initialized | |
987 | * | |
988 | * This code is used to initialize a usb_bus structure, memory for which is | |
989 | * separately managed. | |
990 | */ | |
991 | static void usb_bus_init (struct usb_bus *bus) | |
992 | { | |
993 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); | |
994 | ||
995 | bus->devnum_next = 1; | |
996 | ||
997 | bus->root_hub = NULL; | |
1da177e4 LT |
998 | bus->busnum = -1; |
999 | bus->bandwidth_allocated = 0; | |
1000 | bus->bandwidth_int_reqs = 0; | |
1001 | bus->bandwidth_isoc_reqs = 0; | |
feb26ac3 | 1002 | mutex_init(&bus->devnum_next_mutex); |
1da177e4 LT |
1003 | } |
1004 | ||
1da177e4 LT |
1005 | /*-------------------------------------------------------------------------*/ |
1006 | ||
1007 | /** | |
1008 | * usb_register_bus - registers the USB host controller with the usb core | |
1009 | * @bus: pointer to the bus to register | |
1010 | * Context: !in_interrupt() | |
1011 | * | |
1012 | * Assigns a bus number, and links the controller into usbcore data | |
1013 | * structures so that it can be seen by scanning the bus list. | |
626f090c YB |
1014 | * |
1015 | * Return: 0 if successful. A negative error code otherwise. | |
1da177e4 LT |
1016 | */ |
1017 | static int usb_register_bus(struct usb_bus *bus) | |
1018 | { | |
eb579f58 | 1019 | int result = -E2BIG; |
1da177e4 | 1020 | int busnum; |
1da177e4 | 1021 | |
a4b5d606 | 1022 | mutex_lock(&usb_bus_idr_lock); |
5363de75 HK |
1023 | busnum = idr_alloc(&usb_bus_idr, bus, 1, USB_MAXBUS, GFP_KERNEL); |
1024 | if (busnum < 0) { | |
1025 | pr_err("%s: failed to get bus number\n", usbcore_name); | |
eb579f58 | 1026 | goto error_find_busnum; |
1da177e4 | 1027 | } |
eb579f58 | 1028 | bus->busnum = busnum; |
a4b5d606 | 1029 | mutex_unlock(&usb_bus_idr_lock); |
1da177e4 | 1030 | |
3099e75a | 1031 | usb_notify_add_bus(bus); |
1da177e4 | 1032 | |
eb579f58 IPG |
1033 | dev_info (bus->controller, "new USB bus registered, assigned bus " |
1034 | "number %d\n", bus->busnum); | |
1da177e4 | 1035 | return 0; |
eb579f58 | 1036 | |
eb579f58 | 1037 | error_find_busnum: |
a4b5d606 | 1038 | mutex_unlock(&usb_bus_idr_lock); |
eb579f58 | 1039 | return result; |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | /** | |
1043 | * usb_deregister_bus - deregisters the USB host controller | |
1044 | * @bus: pointer to the bus to deregister | |
1045 | * Context: !in_interrupt() | |
1046 | * | |
1047 | * Recycles the bus number, and unlinks the controller from usbcore data | |
1048 | * structures so that it won't be seen by scanning the bus list. | |
1049 | */ | |
1050 | static void usb_deregister_bus (struct usb_bus *bus) | |
1051 | { | |
1052 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); | |
1053 | ||
1054 | /* | |
1055 | * NOTE: make sure that all the devices are removed by the | |
1056 | * controller code, as well as having it call this when cleaning | |
1057 | * itself up | |
1058 | */ | |
a4b5d606 | 1059 | mutex_lock(&usb_bus_idr_lock); |
5363de75 | 1060 | idr_remove(&usb_bus_idr, bus->busnum); |
a4b5d606 | 1061 | mutex_unlock(&usb_bus_idr_lock); |
1da177e4 | 1062 | |
3099e75a | 1063 | usb_notify_remove_bus(bus); |
1da177e4 LT |
1064 | } |
1065 | ||
1066 | /** | |
8ec8d20b | 1067 | * register_root_hub - called by usb_add_hcd() to register a root hub |
1da177e4 LT |
1068 | * @hcd: host controller for this root hub |
1069 | * | |
8ec8d20b | 1070 | * This function registers the root hub with the USB subsystem. It sets up |
b1e8f0a6 DB |
1071 | * the device properly in the device tree and then calls usb_new_device() |
1072 | * to register the usb device. It also assigns the root hub's USB address | |
1073 | * (always 1). | |
626f090c YB |
1074 | * |
1075 | * Return: 0 if successful. A negative error code otherwise. | |
1da177e4 | 1076 | */ |
b1e8f0a6 | 1077 | static int register_root_hub(struct usb_hcd *hcd) |
1da177e4 LT |
1078 | { |
1079 | struct device *parent_dev = hcd->self.controller; | |
b1e8f0a6 | 1080 | struct usb_device *usb_dev = hcd->self.root_hub; |
1da177e4 LT |
1081 | const int devnum = 1; |
1082 | int retval; | |
1083 | ||
1da177e4 LT |
1084 | usb_dev->devnum = devnum; |
1085 | usb_dev->bus->devnum_next = devnum + 1; | |
1086 | memset (&usb_dev->bus->devmap.devicemap, 0, | |
1087 | sizeof usb_dev->bus->devmap.devicemap); | |
1088 | set_bit (devnum, usb_dev->bus->devmap.devicemap); | |
1089 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); | |
1090 | ||
a4b5d606 | 1091 | mutex_lock(&usb_bus_idr_lock); |
1da177e4 | 1092 | |
551509d2 | 1093 | usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); |
1da177e4 LT |
1094 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); |
1095 | if (retval != sizeof usb_dev->descriptor) { | |
a4b5d606 | 1096 | mutex_unlock(&usb_bus_idr_lock); |
1da177e4 | 1097 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
7071a3ce | 1098 | dev_name(&usb_dev->dev), retval); |
1da177e4 LT |
1099 | return (retval < 0) ? retval : -EMSGSIZE; |
1100 | } | |
2d2a3167 LB |
1101 | |
1102 | if (le16_to_cpu(usb_dev->descriptor.bcdUSB) >= 0x0201) { | |
448b6eb1 | 1103 | retval = usb_get_bos_descriptor(usb_dev); |
2d2a3167 LB |
1104 | if (!retval) { |
1105 | usb_dev->lpm_capable = usb_device_supports_lpm(usb_dev); | |
8a1b2725 | 1106 | } else if (usb_dev->speed >= USB_SPEED_SUPER) { |
a4b5d606 | 1107 | mutex_unlock(&usb_bus_idr_lock); |
448b6eb1 SS |
1108 | dev_dbg(parent_dev, "can't read %s bos descriptor %d\n", |
1109 | dev_name(&usb_dev->dev), retval); | |
1110 | return retval; | |
1111 | } | |
1112 | } | |
1da177e4 | 1113 | |
1da177e4 | 1114 | retval = usb_new_device (usb_dev); |
1da177e4 | 1115 | if (retval) { |
1da177e4 | 1116 | dev_err (parent_dev, "can't register root hub for %s, %d\n", |
7071a3ce | 1117 | dev_name(&usb_dev->dev), retval); |
0a231403 | 1118 | } else { |
1da177e4 LT |
1119 | spin_lock_irq (&hcd_root_hub_lock); |
1120 | hcd->rh_registered = 1; | |
1121 | spin_unlock_irq (&hcd_root_hub_lock); | |
1122 | ||
1123 | /* Did the HC die before the root hub was registered? */ | |
69fff59d | 1124 | if (HCD_DEAD(hcd)) |
1da177e4 LT |
1125 | usb_hc_died (hcd); /* This time clean up */ |
1126 | } | |
a4b5d606 | 1127 | mutex_unlock(&usb_bus_idr_lock); |
1da177e4 LT |
1128 | |
1129 | return retval; | |
1130 | } | |
1da177e4 | 1131 | |
da0aa716 AS |
1132 | /* |
1133 | * usb_hcd_start_port_resume - a root-hub port is sending a resume signal | |
1134 | * @bus: the bus which the root hub belongs to | |
1135 | * @portnum: the port which is being resumed | |
1136 | * | |
1137 | * HCDs should call this function when they know that a resume signal is | |
1138 | * being sent to a root-hub port. The root hub will be prevented from | |
1139 | * going into autosuspend until usb_hcd_end_port_resume() is called. | |
1140 | * | |
1141 | * The bus's private lock must be held by the caller. | |
1142 | */ | |
1143 | void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum) | |
1144 | { | |
1145 | unsigned bit = 1 << portnum; | |
1146 | ||
1147 | if (!(bus->resuming_ports & bit)) { | |
1148 | bus->resuming_ports |= bit; | |
1149 | pm_runtime_get_noresume(&bus->root_hub->dev); | |
1150 | } | |
1151 | } | |
1152 | EXPORT_SYMBOL_GPL(usb_hcd_start_port_resume); | |
1153 | ||
1154 | /* | |
1155 | * usb_hcd_end_port_resume - a root-hub port has stopped sending a resume signal | |
1156 | * @bus: the bus which the root hub belongs to | |
1157 | * @portnum: the port which is being resumed | |
1158 | * | |
1159 | * HCDs should call this function when they know that a resume signal has | |
1160 | * stopped being sent to a root-hub port. The root hub will be allowed to | |
1161 | * autosuspend again. | |
1162 | * | |
1163 | * The bus's private lock must be held by the caller. | |
1164 | */ | |
1165 | void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum) | |
1166 | { | |
1167 | unsigned bit = 1 << portnum; | |
1168 | ||
1169 | if (bus->resuming_ports & bit) { | |
1170 | bus->resuming_ports &= ~bit; | |
1171 | pm_runtime_put_noidle(&bus->root_hub->dev); | |
1172 | } | |
1173 | } | |
1174 | EXPORT_SYMBOL_GPL(usb_hcd_end_port_resume); | |
1da177e4 LT |
1175 | |
1176 | /*-------------------------------------------------------------------------*/ | |
1177 | ||
1178 | /** | |
1179 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds | |
1180 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} | |
1181 | * @is_input: true iff the transaction sends data to the host | |
1182 | * @isoc: true for isochronous transactions, false for interrupt ones | |
1183 | * @bytecount: how many bytes in the transaction. | |
1184 | * | |
626f090c YB |
1185 | * Return: Approximate bus time in nanoseconds for a periodic transaction. |
1186 | * | |
1187 | * Note: | |
1da177e4 LT |
1188 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be |
1189 | * scheduled in software, this function is only used for such scheduling. | |
1190 | */ | |
1191 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) | |
1192 | { | |
1193 | unsigned long tmp; | |
1194 | ||
1195 | switch (speed) { | |
1196 | case USB_SPEED_LOW: /* INTR only */ | |
1197 | if (is_input) { | |
1198 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1199 | return 64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1200 | } else { |
1201 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1202 | return 64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1203 | } |
1204 | case USB_SPEED_FULL: /* ISOC or INTR */ | |
1205 | if (isoc) { | |
1206 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1207 | return ((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1208 | } else { |
1209 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1210 | return 9107L + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1211 | } |
1212 | case USB_SPEED_HIGH: /* ISOC or INTR */ | |
048cb21c | 1213 | /* FIXME adjust for input vs output */ |
1da177e4 | 1214 | if (isoc) |
498f78e6 | 1215 | tmp = HS_NSECS_ISO (bytecount); |
1da177e4 | 1216 | else |
498f78e6 | 1217 | tmp = HS_NSECS (bytecount); |
1da177e4 LT |
1218 | return tmp; |
1219 | default: | |
1220 | pr_debug ("%s: bogus device speed!\n", usbcore_name); | |
1221 | return -1; | |
1222 | } | |
1223 | } | |
782e70c6 | 1224 | EXPORT_SYMBOL_GPL(usb_calc_bus_time); |
1da177e4 | 1225 | |
1da177e4 LT |
1226 | |
1227 | /*-------------------------------------------------------------------------*/ | |
1228 | ||
1229 | /* | |
1230 | * Generic HC operations. | |
1231 | */ | |
1232 | ||
1233 | /*-------------------------------------------------------------------------*/ | |
1234 | ||
e9df41c5 AS |
1235 | /** |
1236 | * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue | |
1237 | * @hcd: host controller to which @urb was submitted | |
1238 | * @urb: URB being submitted | |
1239 | * | |
1240 | * Host controller drivers should call this routine in their enqueue() | |
1241 | * method. The HCD's private spinlock must be held and interrupts must | |
1242 | * be disabled. The actions carried out here are required for URB | |
1243 | * submission, as well as for endpoint shutdown and for usb_kill_urb. | |
1244 | * | |
626f090c | 1245 | * Return: 0 for no error, otherwise a negative error code (in which case |
e9df41c5 AS |
1246 | * the enqueue() method must fail). If no error occurs but enqueue() fails |
1247 | * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing | |
1248 | * the private spinlock and returning. | |
1249 | */ | |
1250 | int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) | |
1da177e4 | 1251 | { |
9a9bf406 | 1252 | int rc = 0; |
1da177e4 | 1253 | |
e9df41c5 | 1254 | spin_lock(&hcd_urb_list_lock); |
1da177e4 | 1255 | |
9a9bf406 | 1256 | /* Check that the URB isn't being killed */ |
49367d8f | 1257 | if (unlikely(atomic_read(&urb->reject))) { |
9a9bf406 AS |
1258 | rc = -EPERM; |
1259 | goto done; | |
9f6a93f7 | 1260 | } |
1da177e4 | 1261 | |
9a9bf406 AS |
1262 | if (unlikely(!urb->ep->enabled)) { |
1263 | rc = -ENOENT; | |
1264 | goto done; | |
1265 | } | |
1da177e4 | 1266 | |
6840d255 AS |
1267 | if (unlikely(!urb->dev->can_submit)) { |
1268 | rc = -EHOSTUNREACH; | |
1269 | goto done; | |
1270 | } | |
1271 | ||
1da177e4 | 1272 | /* |
9a9bf406 AS |
1273 | * Check the host controller's state and add the URB to the |
1274 | * endpoint's queue. | |
1da177e4 | 1275 | */ |
9b37596a | 1276 | if (HCD_RH_RUNNING(hcd)) { |
eb231054 | 1277 | urb->unlinked = 0; |
9a9bf406 | 1278 | list_add_tail(&urb->urb_list, &urb->ep->urb_list); |
9b37596a | 1279 | } else { |
9a9bf406 AS |
1280 | rc = -ESHUTDOWN; |
1281 | goto done; | |
1da177e4 | 1282 | } |
9a9bf406 | 1283 | done: |
e9df41c5 | 1284 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 AS |
1285 | return rc; |
1286 | } | |
e9df41c5 | 1287 | EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); |
9a9bf406 | 1288 | |
e9df41c5 AS |
1289 | /** |
1290 | * usb_hcd_check_unlink_urb - check whether an URB may be unlinked | |
1291 | * @hcd: host controller to which @urb was submitted | |
1292 | * @urb: URB being checked for unlinkability | |
1293 | * @status: error code to store in @urb if the unlink succeeds | |
1294 | * | |
1295 | * Host controller drivers should call this routine in their dequeue() | |
1296 | * method. The HCD's private spinlock must be held and interrupts must | |
1297 | * be disabled. The actions carried out here are required for making | |
1298 | * sure than an unlink is valid. | |
1299 | * | |
626f090c | 1300 | * Return: 0 for no error, otherwise a negative error code (in which case |
e9df41c5 AS |
1301 | * the dequeue() method must fail). The possible error codes are: |
1302 | * | |
1303 | * -EIDRM: @urb was not submitted or has already completed. | |
1304 | * The completion function may not have been called yet. | |
1305 | * | |
1306 | * -EBUSY: @urb has already been unlinked. | |
1307 | */ | |
1308 | int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
9a9bf406 AS |
1309 | int status) |
1310 | { | |
9a9bf406 | 1311 | struct list_head *tmp; |
9a9bf406 AS |
1312 | |
1313 | /* insist the urb is still queued */ | |
1314 | list_for_each(tmp, &urb->ep->urb_list) { | |
1315 | if (tmp == &urb->urb_list) | |
1316 | break; | |
1317 | } | |
e9df41c5 AS |
1318 | if (tmp != &urb->urb_list) |
1319 | return -EIDRM; | |
1da177e4 | 1320 | |
9a9bf406 AS |
1321 | /* Any status except -EINPROGRESS means something already started to |
1322 | * unlink this URB from the hardware. So there's no more work to do. | |
1da177e4 | 1323 | */ |
eb231054 | 1324 | if (urb->unlinked) |
e9df41c5 | 1325 | return -EBUSY; |
eb231054 | 1326 | urb->unlinked = status; |
e9df41c5 | 1327 | return 0; |
9a9bf406 | 1328 | } |
e9df41c5 | 1329 | EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); |
9a9bf406 | 1330 | |
e9df41c5 AS |
1331 | /** |
1332 | * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue | |
1333 | * @hcd: host controller to which @urb was submitted | |
1334 | * @urb: URB being unlinked | |
1335 | * | |
1336 | * Host controller drivers should call this routine before calling | |
1337 | * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and | |
1338 | * interrupts must be disabled. The actions carried out here are required | |
1339 | * for URB completion. | |
1340 | */ | |
1341 | void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) | |
9a9bf406 | 1342 | { |
9a9bf406 | 1343 | /* clear all state linking urb to this dev (and hcd) */ |
e9df41c5 | 1344 | spin_lock(&hcd_urb_list_lock); |
9a9bf406 | 1345 | list_del_init(&urb->urb_list); |
e9df41c5 | 1346 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 | 1347 | } |
e9df41c5 | 1348 | EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); |
9a9bf406 | 1349 | |
b3476675 MD |
1350 | /* |
1351 | * Some usb host controllers can only perform dma using a small SRAM area. | |
1352 | * The usb core itself is however optimized for host controllers that can dma | |
1353 | * using regular system memory - like pci devices doing bus mastering. | |
1354 | * | |
a6cd244b | 1355 | * To support host controllers with limited dma capabilities we provide dma |
b3476675 MD |
1356 | * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. |
1357 | * For this to work properly the host controller code must first use the | |
1358 | * function dma_declare_coherent_memory() to point out which memory area | |
1359 | * that should be used for dma allocations. | |
1360 | * | |
1361 | * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for | |
1362 | * dma using dma_alloc_coherent() which in turn allocates from the memory | |
1363 | * area pointed out with dma_declare_coherent_memory(). | |
1364 | * | |
1365 | * So, to summarize... | |
1366 | * | |
1367 | * - We need "local" memory, canonical example being | |
1368 | * a small SRAM on a discrete controller being the | |
1369 | * only memory that the controller can read ... | |
1370 | * (a) "normal" kernel memory is no good, and | |
1371 | * (b) there's not enough to share | |
1372 | * | |
1373 | * - The only *portable* hook for such stuff in the | |
1374 | * DMA framework is dma_declare_coherent_memory() | |
1375 | * | |
1376 | * - So we use that, even though the primary requirement | |
025d4430 | 1377 | * is that the memory be "local" (hence addressable |
b3476675 MD |
1378 | * by that device), not "coherent". |
1379 | * | |
1380 | */ | |
1381 | ||
1382 | static int hcd_alloc_coherent(struct usb_bus *bus, | |
1383 | gfp_t mem_flags, dma_addr_t *dma_handle, | |
1384 | void **vaddr_handle, size_t size, | |
1385 | enum dma_data_direction dir) | |
1386 | { | |
1387 | unsigned char *vaddr; | |
1388 | ||
4307a28e AR |
1389 | if (*vaddr_handle == NULL) { |
1390 | WARN_ON_ONCE(1); | |
1391 | return -EFAULT; | |
1392 | } | |
1393 | ||
b3476675 MD |
1394 | vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), |
1395 | mem_flags, dma_handle); | |
1396 | if (!vaddr) | |
1397 | return -ENOMEM; | |
1398 | ||
1399 | /* | |
1400 | * Store the virtual address of the buffer at the end | |
1401 | * of the allocated dma buffer. The size of the buffer | |
1402 | * may be uneven so use unaligned functions instead | |
1403 | * of just rounding up. It makes sense to optimize for | |
1404 | * memory footprint over access speed since the amount | |
1405 | * of memory available for dma may be limited. | |
1406 | */ | |
1407 | put_unaligned((unsigned long)*vaddr_handle, | |
1408 | (unsigned long *)(vaddr + size)); | |
1409 | ||
1410 | if (dir == DMA_TO_DEVICE) | |
1411 | memcpy(vaddr, *vaddr_handle, size); | |
1412 | ||
1413 | *vaddr_handle = vaddr; | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, | |
1418 | void **vaddr_handle, size_t size, | |
1419 | enum dma_data_direction dir) | |
1420 | { | |
1421 | unsigned char *vaddr = *vaddr_handle; | |
1422 | ||
1423 | vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); | |
1424 | ||
1425 | if (dir == DMA_FROM_DEVICE) | |
1426 | memcpy(vaddr, *vaddr_handle, size); | |
1427 | ||
1428 | hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); | |
1429 | ||
1430 | *vaddr_handle = vaddr; | |
1431 | *dma_handle = 0; | |
1432 | } | |
1433 | ||
c8cf203a | 1434 | void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) |
ff9c895f | 1435 | { |
58f2266f GU |
1436 | if (IS_ENABLED(CONFIG_HAS_DMA) && |
1437 | (urb->transfer_flags & URB_SETUP_MAP_SINGLE)) | |
bde654a5 | 1438 | dma_unmap_single(hcd->self.sysdev, |
ff9c895f AS |
1439 | urb->setup_dma, |
1440 | sizeof(struct usb_ctrlrequest), | |
1441 | DMA_TO_DEVICE); | |
1442 | else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) | |
1443 | hcd_free_coherent(urb->dev->bus, | |
1444 | &urb->setup_dma, | |
1445 | (void **) &urb->setup_packet, | |
1446 | sizeof(struct usb_ctrlrequest), | |
1447 | DMA_TO_DEVICE); | |
1448 | ||
1dae423d MF |
1449 | /* Make it safe to call this routine more than once */ |
1450 | urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); | |
1451 | } | |
c8cf203a | 1452 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); |
1dae423d | 1453 | |
2694a48d RM |
1454 | static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1455 | { | |
1456 | if (hcd->driver->unmap_urb_for_dma) | |
1457 | hcd->driver->unmap_urb_for_dma(hcd, urb); | |
1458 | else | |
1459 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
1460 | } | |
1461 | ||
c8cf203a | 1462 | void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1dae423d MF |
1463 | { |
1464 | enum dma_data_direction dir; | |
1465 | ||
c8cf203a | 1466 | usb_hcd_unmap_urb_setup_for_dma(hcd, urb); |
1dae423d | 1467 | |
ff9c895f | 1468 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
58f2266f GU |
1469 | if (IS_ENABLED(CONFIG_HAS_DMA) && |
1470 | (urb->transfer_flags & URB_DMA_MAP_SG)) | |
a8c06e40 | 1471 | dma_unmap_sg(hcd->self.sysdev, |
910f8d0c | 1472 | urb->sg, |
ff9c895f AS |
1473 | urb->num_sgs, |
1474 | dir); | |
58f2266f GU |
1475 | else if (IS_ENABLED(CONFIG_HAS_DMA) && |
1476 | (urb->transfer_flags & URB_DMA_MAP_PAGE)) | |
a8c06e40 | 1477 | dma_unmap_page(hcd->self.sysdev, |
ff9c895f AS |
1478 | urb->transfer_dma, |
1479 | urb->transfer_buffer_length, | |
1480 | dir); | |
58f2266f GU |
1481 | else if (IS_ENABLED(CONFIG_HAS_DMA) && |
1482 | (urb->transfer_flags & URB_DMA_MAP_SINGLE)) | |
a8c06e40 | 1483 | dma_unmap_single(hcd->self.sysdev, |
ff9c895f AS |
1484 | urb->transfer_dma, |
1485 | urb->transfer_buffer_length, | |
1486 | dir); | |
1487 | else if (urb->transfer_flags & URB_MAP_LOCAL) | |
1488 | hcd_free_coherent(urb->dev->bus, | |
1489 | &urb->transfer_dma, | |
1490 | &urb->transfer_buffer, | |
1491 | urb->transfer_buffer_length, | |
1492 | dir); | |
1493 | ||
1494 | /* Make it safe to call this routine more than once */ | |
1dae423d | 1495 | urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | |
ff9c895f AS |
1496 | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); |
1497 | } | |
c8cf203a | 1498 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); |
ff9c895f | 1499 | |
b3476675 MD |
1500 | static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
1501 | gfp_t mem_flags) | |
2694a48d RM |
1502 | { |
1503 | if (hcd->driver->map_urb_for_dma) | |
1504 | return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); | |
1505 | else | |
1506 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); | |
1507 | } | |
1508 | ||
1509 | int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, | |
1510 | gfp_t mem_flags) | |
9a9bf406 | 1511 | { |
b3476675 MD |
1512 | enum dma_data_direction dir; |
1513 | int ret = 0; | |
1514 | ||
9a9bf406 AS |
1515 | /* Map the URB's buffers for DMA access. |
1516 | * Lower level HCD code should use *_dma exclusively, | |
e04748e3 SS |
1517 | * unless it uses pio or talks to another transport, |
1518 | * or uses the provided scatter gather list for bulk. | |
1da177e4 | 1519 | */ |
b3476675 | 1520 | |
85bcb5ee | 1521 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
07a8cdd2 AG |
1522 | if (hcd->self.uses_pio_for_control) |
1523 | return ret; | |
58f2266f | 1524 | if (IS_ENABLED(CONFIG_HAS_DMA) && hcd->self.uses_dma) { |
45681366 FF |
1525 | if (is_vmalloc_addr(urb->setup_packet)) { |
1526 | WARN_ONCE(1, "setup packet is not dma capable\n"); | |
1527 | return -EAGAIN; | |
1528 | } else if (object_is_on_stack(urb->setup_packet)) { | |
1529 | WARN_ONCE(1, "setup packet is on stack\n"); | |
1530 | return -EAGAIN; | |
1531 | } | |
1532 | ||
b3476675 | 1533 | urb->setup_dma = dma_map_single( |
a8c06e40 | 1534 | hcd->self.sysdev, |
1da177e4 | 1535 | urb->setup_packet, |
b3476675 | 1536 | sizeof(struct usb_ctrlrequest), |
1da177e4 | 1537 | DMA_TO_DEVICE); |
a8c06e40 | 1538 | if (dma_mapping_error(hcd->self.sysdev, |
85e034fd LF |
1539 | urb->setup_dma)) |
1540 | return -EAGAIN; | |
ff9c895f | 1541 | urb->transfer_flags |= URB_SETUP_MAP_SINGLE; |
f537da68 | 1542 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1543 | ret = hcd_alloc_coherent( |
1544 | urb->dev->bus, mem_flags, | |
1545 | &urb->setup_dma, | |
1546 | (void **)&urb->setup_packet, | |
1547 | sizeof(struct usb_ctrlrequest), | |
1548 | DMA_TO_DEVICE); | |
ff9c895f AS |
1549 | if (ret) |
1550 | return ret; | |
1551 | urb->transfer_flags |= URB_SETUP_MAP_LOCAL; | |
f537da68 | 1552 | } |
b3476675 MD |
1553 | } |
1554 | ||
1555 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
ff9c895f | 1556 | if (urb->transfer_buffer_length != 0 |
b3476675 | 1557 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { |
58f2266f | 1558 | if (IS_ENABLED(CONFIG_HAS_DMA) && hcd->self.uses_dma) { |
ff9c895f | 1559 | if (urb->num_sgs) { |
fe2072cc HG |
1560 | int n; |
1561 | ||
1562 | /* We don't support sg for isoc transfers ! */ | |
1563 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { | |
1564 | WARN_ON(1); | |
1565 | return -EINVAL; | |
1566 | } | |
1567 | ||
1568 | n = dma_map_sg( | |
a8c06e40 | 1569 | hcd->self.sysdev, |
910f8d0c | 1570 | urb->sg, |
ff9c895f AS |
1571 | urb->num_sgs, |
1572 | dir); | |
1573 | if (n <= 0) | |
1574 | ret = -EAGAIN; | |
1575 | else | |
1576 | urb->transfer_flags |= URB_DMA_MAP_SG; | |
bc677d5b CL |
1577 | urb->num_mapped_sgs = n; |
1578 | if (n != urb->num_sgs) | |
ff9c895f AS |
1579 | urb->transfer_flags |= |
1580 | URB_DMA_SG_COMBINED; | |
ff9c895f | 1581 | } else if (urb->sg) { |
910f8d0c | 1582 | struct scatterlist *sg = urb->sg; |
ff9c895f | 1583 | urb->transfer_dma = dma_map_page( |
a8c06e40 | 1584 | hcd->self.sysdev, |
ff9c895f AS |
1585 | sg_page(sg), |
1586 | sg->offset, | |
1587 | urb->transfer_buffer_length, | |
1588 | dir); | |
a8c06e40 | 1589 | if (dma_mapping_error(hcd->self.sysdev, |
85e034fd | 1590 | urb->transfer_dma)) |
ff9c895f AS |
1591 | ret = -EAGAIN; |
1592 | else | |
1593 | urb->transfer_flags |= URB_DMA_MAP_PAGE; | |
29d2fef8 DW |
1594 | } else if (is_vmalloc_addr(urb->transfer_buffer)) { |
1595 | WARN_ONCE(1, "transfer buffer not dma capable\n"); | |
1596 | ret = -EAGAIN; | |
45681366 FF |
1597 | } else if (object_is_on_stack(urb->transfer_buffer)) { |
1598 | WARN_ONCE(1, "transfer buffer is on stack\n"); | |
1599 | ret = -EAGAIN; | |
ff9c895f AS |
1600 | } else { |
1601 | urb->transfer_dma = dma_map_single( | |
a8c06e40 | 1602 | hcd->self.sysdev, |
ff9c895f AS |
1603 | urb->transfer_buffer, |
1604 | urb->transfer_buffer_length, | |
1605 | dir); | |
a8c06e40 | 1606 | if (dma_mapping_error(hcd->self.sysdev, |
ff9c895f AS |
1607 | urb->transfer_dma)) |
1608 | ret = -EAGAIN; | |
1609 | else | |
1610 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; | |
1611 | } | |
85e034fd | 1612 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1613 | ret = hcd_alloc_coherent( |
1614 | urb->dev->bus, mem_flags, | |
1615 | &urb->transfer_dma, | |
1616 | &urb->transfer_buffer, | |
1617 | urb->transfer_buffer_length, | |
1618 | dir); | |
ff9c895f AS |
1619 | if (ret == 0) |
1620 | urb->transfer_flags |= URB_MAP_LOCAL; | |
b3476675 | 1621 | } |
ff9c895f AS |
1622 | if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | |
1623 | URB_SETUP_MAP_LOCAL))) | |
c8cf203a | 1624 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
1da177e4 | 1625 | } |
b3476675 | 1626 | return ret; |
9a9bf406 | 1627 | } |
2694a48d | 1628 | EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); |
1da177e4 | 1629 | |
9a9bf406 AS |
1630 | /*-------------------------------------------------------------------------*/ |
1631 | ||
1632 | /* may be called in any context with a valid urb->dev usecount | |
1633 | * caller surrenders "ownership" of urb | |
1634 | * expects usb_submit_urb() to have sanity checked and conditioned all | |
1635 | * inputs in the urb | |
1636 | */ | |
1637 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) | |
1638 | { | |
1639 | int status; | |
1640 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); | |
1641 | ||
1642 | /* increment urb's reference count as part of giving it to the HCD | |
1643 | * (which will control it). HCD guarantees that it either returns | |
1644 | * an error or calls giveback(), but not both. | |
1645 | */ | |
1646 | usb_get_urb(urb); | |
1647 | atomic_inc(&urb->use_count); | |
4d59d8a1 | 1648 | atomic_inc(&urb->dev->urbnum); |
9a9bf406 AS |
1649 | usbmon_urb_submit(&hcd->self, urb); |
1650 | ||
1651 | /* NOTE requirements on root-hub callers (usbfs and the hub | |
1652 | * driver, for now): URBs' urb->transfer_buffer must be | |
1653 | * valid and usb_buffer_{sync,unmap}() not be needed, since | |
1654 | * they could clobber root hub response data. Also, control | |
1655 | * URBs must be submitted in process context with interrupts | |
1656 | * enabled. | |
1657 | */ | |
b3476675 | 1658 | |
ff9c895f | 1659 | if (is_root_hub(urb->dev)) { |
e9df41c5 | 1660 | status = rh_urb_enqueue(hcd, urb); |
ff9c895f AS |
1661 | } else { |
1662 | status = map_urb_for_dma(hcd, urb, mem_flags); | |
1663 | if (likely(status == 0)) { | |
1664 | status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); | |
1665 | if (unlikely(status)) | |
2694a48d | 1666 | unmap_urb_for_dma(hcd, urb); |
ff9c895f AS |
1667 | } |
1668 | } | |
9a9bf406 AS |
1669 | |
1670 | if (unlikely(status)) { | |
1da177e4 | 1671 | usbmon_urb_submit_error(&hcd->self, urb, status); |
b0d9efba | 1672 | urb->hcpriv = NULL; |
9a9bf406 AS |
1673 | INIT_LIST_HEAD(&urb->urb_list); |
1674 | atomic_dec(&urb->use_count); | |
4d59d8a1 | 1675 | atomic_dec(&urb->dev->urbnum); |
49367d8f | 1676 | if (atomic_read(&urb->reject)) |
9a9bf406 AS |
1677 | wake_up(&usb_kill_urb_queue); |
1678 | usb_put_urb(urb); | |
1da177e4 LT |
1679 | } |
1680 | return status; | |
1681 | } | |
1682 | ||
1683 | /*-------------------------------------------------------------------------*/ | |
1684 | ||
1da177e4 LT |
1685 | /* this makes the hcd giveback() the urb more quickly, by kicking it |
1686 | * off hardware queues (which may take a while) and returning it as | |
1687 | * soon as practical. we've already set up the urb's return status, | |
1688 | * but we can't know if the callback completed already. | |
1689 | */ | |
e9df41c5 | 1690 | static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
1691 | { |
1692 | int value; | |
1693 | ||
809a58b8 | 1694 | if (is_root_hub(urb->dev)) |
e9df41c5 | 1695 | value = usb_rh_urb_dequeue(hcd, urb, status); |
1da177e4 LT |
1696 | else { |
1697 | ||
1698 | /* The only reason an HCD might fail this call is if | |
1699 | * it has not yet fully queued the urb to begin with. | |
1700 | * Such failures should be harmless. */ | |
e9df41c5 | 1701 | value = hcd->driver->urb_dequeue(hcd, urb, status); |
1da177e4 | 1702 | } |
1da177e4 LT |
1703 | return value; |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * called in any context | |
1708 | * | |
1709 | * caller guarantees urb won't be recycled till both unlink() | |
1710 | * and the urb's completion function return | |
1711 | */ | |
a6d2bb9f | 1712 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
1da177e4 | 1713 | { |
9a9bf406 | 1714 | struct usb_hcd *hcd; |
c9919790 | 1715 | struct usb_device *udev = urb->dev; |
cde217a5 AS |
1716 | int retval = -EIDRM; |
1717 | unsigned long flags; | |
1da177e4 | 1718 | |
cde217a5 AS |
1719 | /* Prevent the device and bus from going away while |
1720 | * the unlink is carried out. If they are already gone | |
1721 | * then urb->use_count must be 0, since disconnected | |
1722 | * devices can't have any active URBs. | |
1723 | */ | |
1724 | spin_lock_irqsave(&hcd_urb_unlink_lock, flags); | |
1725 | if (atomic_read(&urb->use_count) > 0) { | |
1726 | retval = 0; | |
c9919790 | 1727 | usb_get_dev(udev); |
cde217a5 AS |
1728 | } |
1729 | spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); | |
1730 | if (retval == 0) { | |
1731 | hcd = bus_to_hcd(urb->dev->bus); | |
1732 | retval = unlink1(hcd, urb, status); | |
c9919790 AS |
1733 | if (retval == 0) |
1734 | retval = -EINPROGRESS; | |
1735 | else if (retval != -EIDRM && retval != -EBUSY) | |
2f964780 | 1736 | dev_dbg(&udev->dev, "hcd_unlink_urb %pK fail %d\n", |
c9919790 AS |
1737 | urb, retval); |
1738 | usb_put_dev(udev); | |
cde217a5 | 1739 | } |
1da177e4 LT |
1740 | return retval; |
1741 | } | |
1742 | ||
1743 | /*-------------------------------------------------------------------------*/ | |
1744 | ||
94dfd7ed ML |
1745 | static void __usb_hcd_giveback_urb(struct urb *urb) |
1746 | { | |
1747 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); | |
6ec4147e | 1748 | struct usb_anchor *anchor = urb->anchor; |
94dfd7ed ML |
1749 | int status = urb->unlinked; |
1750 | unsigned long flags; | |
1751 | ||
1752 | urb->hcpriv = NULL; | |
1753 | if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && | |
1754 | urb->actual_length < urb->transfer_buffer_length && | |
1755 | !status)) | |
1756 | status = -EREMOTEIO; | |
1757 | ||
1758 | unmap_urb_for_dma(hcd, urb); | |
1759 | usbmon_urb_complete(&hcd->self, urb, status); | |
6ec4147e | 1760 | usb_anchor_suspend_wakeups(anchor); |
94dfd7ed | 1761 | usb_unanchor_urb(urb); |
0cfbd328 MS |
1762 | if (likely(status == 0)) |
1763 | usb_led_activity(USB_LED_EVENT_HOST); | |
94dfd7ed ML |
1764 | |
1765 | /* pass ownership to the completion handler */ | |
1766 | urb->status = status; | |
1767 | ||
1768 | /* | |
1769 | * We disable local IRQs here avoid possible deadlock because | |
1770 | * drivers may call spin_lock() to hold lock which might be | |
1771 | * acquired in one hard interrupt handler. | |
1772 | * | |
1773 | * The local_irq_save()/local_irq_restore() around complete() | |
1774 | * will be removed if current USB drivers have been cleaned up | |
1775 | * and no one may trigger the above deadlock situation when | |
1776 | * running complete() in tasklet. | |
1777 | */ | |
1778 | local_irq_save(flags); | |
1779 | urb->complete(urb); | |
1780 | local_irq_restore(flags); | |
1781 | ||
6ec4147e | 1782 | usb_anchor_resume_wakeups(anchor); |
94dfd7ed ML |
1783 | atomic_dec(&urb->use_count); |
1784 | if (unlikely(atomic_read(&urb->reject))) | |
1785 | wake_up(&usb_kill_urb_queue); | |
1786 | usb_put_urb(urb); | |
1787 | } | |
1788 | ||
1789 | static void usb_giveback_urb_bh(unsigned long param) | |
1790 | { | |
1791 | struct giveback_urb_bh *bh = (struct giveback_urb_bh *)param; | |
1792 | struct list_head local_list; | |
1793 | ||
1794 | spin_lock_irq(&bh->lock); | |
1795 | bh->running = true; | |
1796 | restart: | |
1797 | list_replace_init(&bh->head, &local_list); | |
1798 | spin_unlock_irq(&bh->lock); | |
1799 | ||
1800 | while (!list_empty(&local_list)) { | |
1801 | struct urb *urb; | |
1802 | ||
1803 | urb = list_entry(local_list.next, struct urb, urb_list); | |
1804 | list_del_init(&urb->urb_list); | |
c7ccde6e | 1805 | bh->completing_ep = urb->ep; |
94dfd7ed | 1806 | __usb_hcd_giveback_urb(urb); |
c7ccde6e | 1807 | bh->completing_ep = NULL; |
94dfd7ed ML |
1808 | } |
1809 | ||
1810 | /* check if there are new URBs to giveback */ | |
1811 | spin_lock_irq(&bh->lock); | |
1812 | if (!list_empty(&bh->head)) | |
1813 | goto restart; | |
1814 | bh->running = false; | |
1815 | spin_unlock_irq(&bh->lock); | |
1816 | } | |
1817 | ||
32aca560 AS |
1818 | /** |
1819 | * usb_hcd_giveback_urb - return URB from HCD to device driver | |
1820 | * @hcd: host controller returning the URB | |
1821 | * @urb: urb being returned to the USB device driver. | |
4a00027d | 1822 | * @status: completion status code for the URB. |
32aca560 AS |
1823 | * Context: in_interrupt() |
1824 | * | |
1825 | * This hands the URB from HCD to its USB device driver, using its | |
1826 | * completion function. The HCD has freed all per-urb resources | |
1827 | * (and is done using urb->hcpriv). It also released all HCD locks; | |
1828 | * the device driver won't cause problems if it frees, modifies, | |
1829 | * or resubmits this URB. | |
eb231054 | 1830 | * |
4a00027d | 1831 | * If @urb was unlinked, the value of @status will be overridden by |
eb231054 AS |
1832 | * @urb->unlinked. Erroneous short transfers are detected in case |
1833 | * the HCD hasn't checked for them. | |
32aca560 | 1834 | */ |
4a00027d | 1835 | void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) |
32aca560 | 1836 | { |
94dfd7ed ML |
1837 | struct giveback_urb_bh *bh; |
1838 | bool running, high_prio_bh; | |
32aca560 | 1839 | |
94dfd7ed ML |
1840 | /* pass status to tasklet via unlinked */ |
1841 | if (likely(!urb->unlinked)) | |
1842 | urb->unlinked = status; | |
1f5a3d0f | 1843 | |
94dfd7ed ML |
1844 | if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) { |
1845 | __usb_hcd_giveback_urb(urb); | |
1846 | return; | |
1847 | } | |
1848 | ||
1849 | if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) { | |
1850 | bh = &hcd->high_prio_bh; | |
1851 | high_prio_bh = true; | |
1852 | } else { | |
1853 | bh = &hcd->low_prio_bh; | |
1854 | high_prio_bh = false; | |
1855 | } | |
1856 | ||
1857 | spin_lock(&bh->lock); | |
1858 | list_add_tail(&urb->urb_list, &bh->head); | |
1859 | running = bh->running; | |
1860 | spin_unlock(&bh->lock); | |
1861 | ||
1862 | if (running) | |
1863 | ; | |
1864 | else if (high_prio_bh) | |
1865 | tasklet_hi_schedule(&bh->bh); | |
1866 | else | |
1867 | tasklet_schedule(&bh->bh); | |
32aca560 | 1868 | } |
782e70c6 | 1869 | EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); |
32aca560 AS |
1870 | |
1871 | /*-------------------------------------------------------------------------*/ | |
1872 | ||
95cf82f9 AS |
1873 | /* Cancel all URBs pending on this endpoint and wait for the endpoint's |
1874 | * queue to drain completely. The caller must first insure that no more | |
1875 | * URBs can be submitted for this endpoint. | |
1da177e4 | 1876 | */ |
95cf82f9 | 1877 | void usb_hcd_flush_endpoint(struct usb_device *udev, |
a6d2bb9f | 1878 | struct usb_host_endpoint *ep) |
1da177e4 LT |
1879 | { |
1880 | struct usb_hcd *hcd; | |
1881 | struct urb *urb; | |
1882 | ||
95cf82f9 AS |
1883 | if (!ep) |
1884 | return; | |
9a9bf406 | 1885 | might_sleep(); |
17200583 | 1886 | hcd = bus_to_hcd(udev->bus); |
1da177e4 | 1887 | |
95cf82f9 | 1888 | /* No more submits can occur */ |
9a9bf406 | 1889 | spin_lock_irq(&hcd_urb_list_lock); |
ddc1fd6a | 1890 | rescan: |
2eac1362 | 1891 | list_for_each_entry_reverse(urb, &ep->urb_list, urb_list) { |
5e60a161 | 1892 | int is_in; |
1da177e4 | 1893 | |
eb231054 | 1894 | if (urb->unlinked) |
1da177e4 LT |
1895 | continue; |
1896 | usb_get_urb (urb); | |
5e60a161 | 1897 | is_in = usb_urb_dir_in(urb); |
809a58b8 | 1898 | spin_unlock(&hcd_urb_list_lock); |
1da177e4 | 1899 | |
e9df41c5 AS |
1900 | /* kick hcd */ |
1901 | unlink1(hcd, urb, -ESHUTDOWN); | |
1902 | dev_dbg (hcd->self.controller, | |
2f964780 | 1903 | "shutdown urb %pK ep%d%s%s\n", |
e9df41c5 AS |
1904 | urb, usb_endpoint_num(&ep->desc), |
1905 | is_in ? "in" : "out", | |
1906 | ({ char *s; | |
1907 | ||
1908 | switch (usb_endpoint_type(&ep->desc)) { | |
1909 | case USB_ENDPOINT_XFER_CONTROL: | |
1910 | s = ""; break; | |
1911 | case USB_ENDPOINT_XFER_BULK: | |
1912 | s = "-bulk"; break; | |
1913 | case USB_ENDPOINT_XFER_INT: | |
1914 | s = "-intr"; break; | |
1915 | default: | |
14557359 | 1916 | s = "-iso"; break; |
e9df41c5 AS |
1917 | }; |
1918 | s; | |
1919 | })); | |
1da177e4 LT |
1920 | usb_put_urb (urb); |
1921 | ||
1922 | /* list contents may have changed */ | |
ddc1fd6a | 1923 | spin_lock(&hcd_urb_list_lock); |
1da177e4 LT |
1924 | goto rescan; |
1925 | } | |
9a9bf406 | 1926 | spin_unlock_irq(&hcd_urb_list_lock); |
1da177e4 | 1927 | |
95cf82f9 | 1928 | /* Wait until the endpoint queue is completely empty */ |
455b25fb | 1929 | while (!list_empty (&ep->urb_list)) { |
809a58b8 | 1930 | spin_lock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1931 | |
1932 | /* The list may have changed while we acquired the spinlock */ | |
1933 | urb = NULL; | |
1934 | if (!list_empty (&ep->urb_list)) { | |
1935 | urb = list_entry (ep->urb_list.prev, struct urb, | |
1936 | urb_list); | |
1937 | usb_get_urb (urb); | |
1938 | } | |
809a58b8 | 1939 | spin_unlock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1940 | |
1941 | if (urb) { | |
1942 | usb_kill_urb (urb); | |
1943 | usb_put_urb (urb); | |
1944 | } | |
1945 | } | |
1da177e4 LT |
1946 | } |
1947 | ||
3f0479e0 | 1948 | /** |
70445ae6 RD |
1949 | * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds |
1950 | * the bus bandwidth | |
1951 | * @udev: target &usb_device | |
3f0479e0 SS |
1952 | * @new_config: new configuration to install |
1953 | * @cur_alt: the current alternate interface setting | |
1954 | * @new_alt: alternate interface setting that is being installed | |
1955 | * | |
1956 | * To change configurations, pass in the new configuration in new_config, | |
1957 | * and pass NULL for cur_alt and new_alt. | |
1958 | * | |
1959 | * To reset a device's configuration (put the device in the ADDRESSED state), | |
1960 | * pass in NULL for new_config, cur_alt, and new_alt. | |
1961 | * | |
1962 | * To change alternate interface settings, pass in NULL for new_config, | |
1963 | * pass in the current alternate interface setting in cur_alt, | |
1964 | * and pass in the new alternate interface setting in new_alt. | |
1965 | * | |
626f090c | 1966 | * Return: An error if the requested bandwidth change exceeds the |
3f0479e0 | 1967 | * bus bandwidth or host controller internal resources. |
79abb1ab | 1968 | */ |
3f0479e0 | 1969 | int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 1970 | struct usb_host_config *new_config, |
3f0479e0 SS |
1971 | struct usb_host_interface *cur_alt, |
1972 | struct usb_host_interface *new_alt) | |
79abb1ab SS |
1973 | { |
1974 | int num_intfs, i, j; | |
576a362a | 1975 | struct usb_host_interface *alt = NULL; |
79abb1ab SS |
1976 | int ret = 0; |
1977 | struct usb_hcd *hcd; | |
1978 | struct usb_host_endpoint *ep; | |
1979 | ||
1980 | hcd = bus_to_hcd(udev->bus); | |
1981 | if (!hcd->driver->check_bandwidth) | |
1982 | return 0; | |
1983 | ||
1984 | /* Configuration is being removed - set configuration 0 */ | |
3f0479e0 | 1985 | if (!new_config && !cur_alt) { |
79abb1ab SS |
1986 | for (i = 1; i < 16; ++i) { |
1987 | ep = udev->ep_out[i]; | |
1988 | if (ep) | |
1989 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1990 | ep = udev->ep_in[i]; | |
1991 | if (ep) | |
1992 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1993 | } | |
1994 | hcd->driver->check_bandwidth(hcd, udev); | |
1995 | return 0; | |
1996 | } | |
1997 | /* Check if the HCD says there's enough bandwidth. Enable all endpoints | |
1998 | * each interface's alt setting 0 and ask the HCD to check the bandwidth | |
1999 | * of the bus. There will always be bandwidth for endpoint 0, so it's | |
2000 | * ok to exclude it. | |
2001 | */ | |
2002 | if (new_config) { | |
2003 | num_intfs = new_config->desc.bNumInterfaces; | |
2004 | /* Remove endpoints (except endpoint 0, which is always on the | |
2005 | * schedule) from the old config from the schedule | |
2006 | */ | |
2007 | for (i = 1; i < 16; ++i) { | |
2008 | ep = udev->ep_out[i]; | |
2009 | if (ep) { | |
2010 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
2011 | if (ret < 0) | |
2012 | goto reset; | |
2013 | } | |
2014 | ep = udev->ep_in[i]; | |
2015 | if (ep) { | |
2016 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
2017 | if (ret < 0) | |
2018 | goto reset; | |
2019 | } | |
2020 | } | |
2021 | for (i = 0; i < num_intfs; ++i) { | |
d837e219 SS |
2022 | struct usb_host_interface *first_alt; |
2023 | int iface_num; | |
2024 | ||
2025 | first_alt = &new_config->intf_cache[i]->altsetting[0]; | |
2026 | iface_num = first_alt->desc.bInterfaceNumber; | |
91017f9c | 2027 | /* Set up endpoints for alternate interface setting 0 */ |
d837e219 | 2028 | alt = usb_find_alt_setting(new_config, iface_num, 0); |
3f0479e0 SS |
2029 | if (!alt) |
2030 | /* No alt setting 0? Pick the first setting. */ | |
d837e219 | 2031 | alt = first_alt; |
3f0479e0 | 2032 | |
79abb1ab SS |
2033 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { |
2034 | ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); | |
2035 | if (ret < 0) | |
2036 | goto reset; | |
2037 | } | |
2038 | } | |
2039 | } | |
3f0479e0 | 2040 | if (cur_alt && new_alt) { |
04a723ea SS |
2041 | struct usb_interface *iface = usb_ifnum_to_if(udev, |
2042 | cur_alt->desc.bInterfaceNumber); | |
2043 | ||
8a9af4fd SS |
2044 | if (!iface) |
2045 | return -EINVAL; | |
04a723ea SS |
2046 | if (iface->resetting_device) { |
2047 | /* | |
2048 | * The USB core just reset the device, so the xHCI host | |
2049 | * and the device will think alt setting 0 is installed. | |
2050 | * However, the USB core will pass in the alternate | |
2051 | * setting installed before the reset as cur_alt. Dig | |
2052 | * out the alternate setting 0 structure, or the first | |
2053 | * alternate setting if a broken device doesn't have alt | |
2054 | * setting 0. | |
2055 | */ | |
2056 | cur_alt = usb_altnum_to_altsetting(iface, 0); | |
2057 | if (!cur_alt) | |
2058 | cur_alt = &iface->altsetting[0]; | |
2059 | } | |
2060 | ||
3f0479e0 SS |
2061 | /* Drop all the endpoints in the current alt setting */ |
2062 | for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { | |
2063 | ret = hcd->driver->drop_endpoint(hcd, udev, | |
2064 | &cur_alt->endpoint[i]); | |
2065 | if (ret < 0) | |
2066 | goto reset; | |
2067 | } | |
2068 | /* Add all the endpoints in the new alt setting */ | |
2069 | for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { | |
2070 | ret = hcd->driver->add_endpoint(hcd, udev, | |
2071 | &new_alt->endpoint[i]); | |
2072 | if (ret < 0) | |
2073 | goto reset; | |
2074 | } | |
2075 | } | |
79abb1ab SS |
2076 | ret = hcd->driver->check_bandwidth(hcd, udev); |
2077 | reset: | |
2078 | if (ret < 0) | |
2079 | hcd->driver->reset_bandwidth(hcd, udev); | |
2080 | return ret; | |
2081 | } | |
2082 | ||
95cf82f9 AS |
2083 | /* Disables the endpoint: synchronizes with the hcd to make sure all |
2084 | * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must | |
2085 | * have been called previously. Use for set_configuration, set_interface, | |
2086 | * driver removal, physical disconnect. | |
2087 | * | |
2088 | * example: a qh stored in ep->hcpriv, holding state related to endpoint | |
2089 | * type, maxpacket size, toggle, halt status, and scheduling. | |
2090 | */ | |
2091 | void usb_hcd_disable_endpoint(struct usb_device *udev, | |
2092 | struct usb_host_endpoint *ep) | |
2093 | { | |
2094 | struct usb_hcd *hcd; | |
2095 | ||
2096 | might_sleep(); | |
2097 | hcd = bus_to_hcd(udev->bus); | |
2098 | if (hcd->driver->endpoint_disable) | |
2099 | hcd->driver->endpoint_disable(hcd, ep); | |
2100 | } | |
2101 | ||
3444b26a DV |
2102 | /** |
2103 | * usb_hcd_reset_endpoint - reset host endpoint state | |
2104 | * @udev: USB device. | |
2105 | * @ep: the endpoint to reset. | |
2106 | * | |
2107 | * Resets any host endpoint state such as the toggle bit, sequence | |
2108 | * number and current window. | |
2109 | */ | |
2110 | void usb_hcd_reset_endpoint(struct usb_device *udev, | |
2111 | struct usb_host_endpoint *ep) | |
2112 | { | |
2113 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
2114 | ||
2115 | if (hcd->driver->endpoint_reset) | |
2116 | hcd->driver->endpoint_reset(hcd, ep); | |
2117 | else { | |
2118 | int epnum = usb_endpoint_num(&ep->desc); | |
2119 | int is_out = usb_endpoint_dir_out(&ep->desc); | |
2120 | int is_control = usb_endpoint_xfer_control(&ep->desc); | |
2121 | ||
2122 | usb_settoggle(udev, epnum, is_out, 0); | |
2123 | if (is_control) | |
2124 | usb_settoggle(udev, epnum, !is_out, 0); | |
2125 | } | |
2126 | } | |
2127 | ||
eab1cafc SS |
2128 | /** |
2129 | * usb_alloc_streams - allocate bulk endpoint stream IDs. | |
2130 | * @interface: alternate setting that includes all endpoints. | |
2131 | * @eps: array of endpoints that need streams. | |
2132 | * @num_eps: number of endpoints in the array. | |
2133 | * @num_streams: number of streams to allocate. | |
2134 | * @mem_flags: flags hcd should use to allocate memory. | |
2135 | * | |
626f090c | 2136 | * Sets up a group of bulk endpoints to have @num_streams stream IDs available. |
eab1cafc SS |
2137 | * Drivers may queue multiple transfers to different stream IDs, which may |
2138 | * complete in a different order than they were queued. | |
626f090c YB |
2139 | * |
2140 | * Return: On success, the number of allocated streams. On failure, a negative | |
2141 | * error code. | |
eab1cafc SS |
2142 | */ |
2143 | int usb_alloc_streams(struct usb_interface *interface, | |
2144 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2145 | unsigned int num_streams, gfp_t mem_flags) | |
2146 | { | |
2147 | struct usb_hcd *hcd; | |
2148 | struct usb_device *dev; | |
8d4f70b2 | 2149 | int i, ret; |
eab1cafc SS |
2150 | |
2151 | dev = interface_to_usbdev(interface); | |
2152 | hcd = bus_to_hcd(dev->bus); | |
2153 | if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) | |
2154 | return -EINVAL; | |
8a1b2725 | 2155 | if (dev->speed < USB_SPEED_SUPER) |
eab1cafc | 2156 | return -EINVAL; |
90a646c7 HG |
2157 | if (dev->state < USB_STATE_CONFIGURED) |
2158 | return -ENODEV; | |
eab1cafc | 2159 | |
8d4f70b2 HG |
2160 | for (i = 0; i < num_eps; i++) { |
2161 | /* Streams only apply to bulk endpoints. */ | |
eab1cafc SS |
2162 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) |
2163 | return -EINVAL; | |
8d4f70b2 HG |
2164 | /* Re-alloc is not allowed */ |
2165 | if (eps[i]->streams) | |
2166 | return -EINVAL; | |
2167 | } | |
eab1cafc | 2168 | |
8d4f70b2 | 2169 | ret = hcd->driver->alloc_streams(hcd, dev, eps, num_eps, |
eab1cafc | 2170 | num_streams, mem_flags); |
8d4f70b2 HG |
2171 | if (ret < 0) |
2172 | return ret; | |
2173 | ||
2174 | for (i = 0; i < num_eps; i++) | |
2175 | eps[i]->streams = ret; | |
2176 | ||
2177 | return ret; | |
eab1cafc SS |
2178 | } |
2179 | EXPORT_SYMBOL_GPL(usb_alloc_streams); | |
2180 | ||
2181 | /** | |
2182 | * usb_free_streams - free bulk endpoint stream IDs. | |
2183 | * @interface: alternate setting that includes all endpoints. | |
2184 | * @eps: array of endpoints to remove streams from. | |
2185 | * @num_eps: number of endpoints in the array. | |
2186 | * @mem_flags: flags hcd should use to allocate memory. | |
2187 | * | |
2188 | * Reverts a group of bulk endpoints back to not using stream IDs. | |
2189 | * Can fail if we are given bad arguments, or HCD is broken. | |
6c74dada | 2190 | * |
12d4bbce | 2191 | * Return: 0 on success. On failure, a negative error code. |
eab1cafc | 2192 | */ |
6c74dada | 2193 | int usb_free_streams(struct usb_interface *interface, |
eab1cafc SS |
2194 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2195 | gfp_t mem_flags) | |
2196 | { | |
2197 | struct usb_hcd *hcd; | |
2198 | struct usb_device *dev; | |
8d4f70b2 | 2199 | int i, ret; |
eab1cafc SS |
2200 | |
2201 | dev = interface_to_usbdev(interface); | |
2202 | hcd = bus_to_hcd(dev->bus); | |
8a1b2725 | 2203 | if (dev->speed < USB_SPEED_SUPER) |
6c74dada | 2204 | return -EINVAL; |
eab1cafc | 2205 | |
8d4f70b2 | 2206 | /* Double-free is not allowed */ |
eab1cafc | 2207 | for (i = 0; i < num_eps; i++) |
8d4f70b2 | 2208 | if (!eps[i] || !eps[i]->streams) |
6c74dada | 2209 | return -EINVAL; |
eab1cafc | 2210 | |
8d4f70b2 HG |
2211 | ret = hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); |
2212 | if (ret < 0) | |
2213 | return ret; | |
2214 | ||
2215 | for (i = 0; i < num_eps; i++) | |
2216 | eps[i]->streams = 0; | |
2217 | ||
2218 | return ret; | |
eab1cafc SS |
2219 | } |
2220 | EXPORT_SYMBOL_GPL(usb_free_streams); | |
2221 | ||
cde217a5 AS |
2222 | /* Protect against drivers that try to unlink URBs after the device |
2223 | * is gone, by waiting until all unlinks for @udev are finished. | |
2224 | * Since we don't currently track URBs by device, simply wait until | |
2225 | * nothing is running in the locked region of usb_hcd_unlink_urb(). | |
2226 | */ | |
2227 | void usb_hcd_synchronize_unlinks(struct usb_device *udev) | |
2228 | { | |
2229 | spin_lock_irq(&hcd_urb_unlink_lock); | |
2230 | spin_unlock_irq(&hcd_urb_unlink_lock); | |
2231 | } | |
2232 | ||
1da177e4 LT |
2233 | /*-------------------------------------------------------------------------*/ |
2234 | ||
32aca560 AS |
2235 | /* called in any context */ |
2236 | int usb_hcd_get_frame_number (struct usb_device *udev) | |
2237 | { | |
2238 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
2239 | ||
9b37596a | 2240 | if (!HCD_RH_RUNNING(hcd)) |
32aca560 AS |
2241 | return -ESHUTDOWN; |
2242 | return hcd->driver->get_frame_number (hcd); | |
2243 | } | |
2244 | ||
2245 | /*-------------------------------------------------------------------------*/ | |
2246 | ||
9293677a | 2247 | #ifdef CONFIG_PM |
1da177e4 | 2248 | |
65bfd296 | 2249 | int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 2250 | { |
6ae706ae | 2251 | struct usb_hcd *hcd = bus_to_hcd(rhdev->bus); |
686314cf AS |
2252 | int status; |
2253 | int old_state = hcd->state; | |
1da177e4 | 2254 | |
30b1a7a3 AS |
2255 | dev_dbg(&rhdev->dev, "bus %ssuspend, wakeup %d\n", |
2256 | (PMSG_IS_AUTO(msg) ? "auto-" : ""), | |
2257 | rhdev->do_remote_wakeup); | |
9b37596a AS |
2258 | if (HCD_DEAD(hcd)) { |
2259 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); | |
2260 | return 0; | |
2261 | } | |
2262 | ||
686314cf AS |
2263 | if (!hcd->driver->bus_suspend) { |
2264 | status = -ENOENT; | |
2265 | } else { | |
9b37596a | 2266 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
686314cf AS |
2267 | hcd->state = HC_STATE_QUIESCING; |
2268 | status = hcd->driver->bus_suspend(hcd); | |
2269 | } | |
2270 | if (status == 0) { | |
2271 | usb_set_device_state(rhdev, USB_STATE_SUSPENDED); | |
9293677a | 2272 | hcd->state = HC_STATE_SUSPENDED; |
879d38e6 AS |
2273 | |
2274 | /* Did we race with a root-hub wakeup event? */ | |
2275 | if (rhdev->do_remote_wakeup) { | |
2276 | char buffer[6]; | |
2277 | ||
2278 | status = hcd->driver->hub_status_data(hcd, buffer); | |
2279 | if (status != 0) { | |
2280 | dev_dbg(&rhdev->dev, "suspend raced with wakeup event\n"); | |
2281 | hcd_bus_resume(rhdev, PMSG_AUTO_RESUME); | |
2282 | status = -EBUSY; | |
2283 | } | |
2284 | } | |
686314cf | 2285 | } else { |
9b37596a AS |
2286 | spin_lock_irq(&hcd_root_hub_lock); |
2287 | if (!HCD_DEAD(hcd)) { | |
2288 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2289 | hcd->state = old_state; | |
2290 | } | |
2291 | spin_unlock_irq(&hcd_root_hub_lock); | |
686314cf | 2292 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2293 | "suspend", status); |
686314cf | 2294 | } |
9293677a | 2295 | return status; |
1da177e4 LT |
2296 | } |
2297 | ||
65bfd296 | 2298 | int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 2299 | { |
6ae706ae | 2300 | struct usb_hcd *hcd = bus_to_hcd(rhdev->bus); |
686314cf | 2301 | int status; |
cfa59dab | 2302 | int old_state = hcd->state; |
1da177e4 | 2303 | |
30b1a7a3 AS |
2304 | dev_dbg(&rhdev->dev, "usb %sresume\n", |
2305 | (PMSG_IS_AUTO(msg) ? "auto-" : "")); | |
9b37596a AS |
2306 | if (HCD_DEAD(hcd)) { |
2307 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); | |
2308 | return 0; | |
2309 | } | |
0c0382e3 | 2310 | if (!hcd->driver->bus_resume) |
9293677a | 2311 | return -ENOENT; |
9b37596a | 2312 | if (HCD_RH_RUNNING(hcd)) |
979d5199 | 2313 | return 0; |
686314cf | 2314 | |
9293677a | 2315 | hcd->state = HC_STATE_RESUMING; |
686314cf | 2316 | status = hcd->driver->bus_resume(hcd); |
bf3d7d40 | 2317 | clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
686314cf | 2318 | if (status == 0) { |
bfd1e910 AS |
2319 | struct usb_device *udev; |
2320 | int port1; | |
2321 | ||
9b37596a AS |
2322 | spin_lock_irq(&hcd_root_hub_lock); |
2323 | if (!HCD_DEAD(hcd)) { | |
2324 | usb_set_device_state(rhdev, rhdev->actconfig | |
2325 | ? USB_STATE_CONFIGURED | |
2326 | : USB_STATE_ADDRESS); | |
2327 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2328 | hcd->state = HC_STATE_RUNNING; | |
2329 | } | |
2330 | spin_unlock_irq(&hcd_root_hub_lock); | |
bfd1e910 AS |
2331 | |
2332 | /* | |
2333 | * Check whether any of the enabled ports on the root hub are | |
2334 | * unsuspended. If they are then a TRSMRCY delay is needed | |
2335 | * (this is what the USB-2 spec calls a "global resume"). | |
2336 | * Otherwise we can skip the delay. | |
2337 | */ | |
2338 | usb_hub_for_each_child(rhdev, port1, udev) { | |
2339 | if (udev->state != USB_STATE_NOTATTACHED && | |
2340 | !udev->port_is_suspended) { | |
2341 | usleep_range(10000, 11000); /* TRSMRCY */ | |
2342 | break; | |
2343 | } | |
2344 | } | |
686314cf | 2345 | } else { |
cfa59dab | 2346 | hcd->state = old_state; |
686314cf | 2347 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2348 | "resume", status); |
cfa59dab AS |
2349 | if (status != -ESHUTDOWN) |
2350 | usb_hc_died(hcd); | |
9293677a DB |
2351 | } |
2352 | return status; | |
1da177e4 LT |
2353 | } |
2354 | ||
6b157c9b AS |
2355 | /* Workqueue routine for root-hub remote wakeup */ |
2356 | static void hcd_resume_work(struct work_struct *work) | |
2357 | { | |
2358 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); | |
2359 | struct usb_device *udev = hcd->self.root_hub; | |
2360 | ||
0534d468 | 2361 | usb_remote_wakeup(udev); |
6b157c9b AS |
2362 | } |
2363 | ||
1da177e4 | 2364 | /** |
14557359 | 2365 | * usb_hcd_resume_root_hub - called by HCD to resume its root hub |
1da177e4 LT |
2366 | * @hcd: host controller for this root hub |
2367 | * | |
2368 | * The USB host controller calls this function when its root hub is | |
2369 | * suspended (with the remote wakeup feature enabled) and a remote | |
6b157c9b AS |
2370 | * wakeup request is received. The routine submits a workqueue request |
2371 | * to resume the root hub (that is, manage its downstream ports again). | |
1da177e4 LT |
2372 | */ |
2373 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) | |
2374 | { | |
2375 | unsigned long flags; | |
2376 | ||
2377 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
ff2f0787 AS |
2378 | if (hcd->rh_registered) { |
2379 | set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); | |
9bbdf1e0 | 2380 | queue_work(pm_wq, &hcd->wakeup_work); |
ff2f0787 | 2381 | } |
1da177e4 LT |
2382 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
2383 | } | |
9293677a | 2384 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
1da177e4 | 2385 | |
ceb6c9c8 | 2386 | #endif /* CONFIG_PM */ |
1da177e4 LT |
2387 | |
2388 | /*-------------------------------------------------------------------------*/ | |
2389 | ||
2390 | #ifdef CONFIG_USB_OTG | |
2391 | ||
2392 | /** | |
2393 | * usb_bus_start_enum - start immediate enumeration (for OTG) | |
2394 | * @bus: the bus (must use hcd framework) | |
2395 | * @port_num: 1-based number of port; usually bus->otg_port | |
2396 | * Context: in_interrupt() | |
2397 | * | |
2398 | * Starts enumeration, with an immediate reset followed later by | |
37ebb549 | 2399 | * hub_wq identifying and possibly configuring the device. |
1da177e4 LT |
2400 | * This is needed by OTG controller drivers, where it helps meet |
2401 | * HNP protocol timing requirements for starting a port reset. | |
626f090c YB |
2402 | * |
2403 | * Return: 0 if successful. | |
1da177e4 LT |
2404 | */ |
2405 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) | |
2406 | { | |
2407 | struct usb_hcd *hcd; | |
2408 | int status = -EOPNOTSUPP; | |
2409 | ||
2410 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, | |
2411 | * boards with root hubs hooked up to internal devices (instead of | |
2412 | * just the OTG port) may need more attention to resetting... | |
2413 | */ | |
6ae706ae | 2414 | hcd = bus_to_hcd(bus); |
1da177e4 LT |
2415 | if (port_num && hcd->driver->start_port_reset) |
2416 | status = hcd->driver->start_port_reset(hcd, port_num); | |
2417 | ||
37ebb549 | 2418 | /* allocate hub_wq shortly after (first) root port reset finishes; |
1da177e4 LT |
2419 | * it may issue others, until at least 50 msecs have passed. |
2420 | */ | |
2421 | if (status == 0) | |
2422 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); | |
2423 | return status; | |
2424 | } | |
782e70c6 | 2425 | EXPORT_SYMBOL_GPL(usb_bus_start_enum); |
1da177e4 LT |
2426 | |
2427 | #endif | |
2428 | ||
2429 | /*-------------------------------------------------------------------------*/ | |
2430 | ||
1da177e4 LT |
2431 | /** |
2432 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) | |
2433 | * @irq: the IRQ being raised | |
2434 | * @__hcd: pointer to the HCD whose IRQ is being signaled | |
1da177e4 LT |
2435 | * |
2436 | * If the controller isn't HALTed, calls the driver's irq handler. | |
2437 | * Checks whether the controller is now dead. | |
626f090c YB |
2438 | * |
2439 | * Return: %IRQ_HANDLED if the IRQ was handled. %IRQ_NONE otherwise. | |
1da177e4 | 2440 | */ |
7d12e780 | 2441 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
1da177e4 LT |
2442 | { |
2443 | struct usb_hcd *hcd = __hcd; | |
de85422b | 2444 | irqreturn_t rc; |
1da177e4 | 2445 | |
968b822c | 2446 | if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) |
de85422b | 2447 | rc = IRQ_NONE; |
968b822c | 2448 | else if (hcd->driver->irq(hcd) == IRQ_NONE) |
de85422b | 2449 | rc = IRQ_NONE; |
968b822c | 2450 | else |
de85422b | 2451 | rc = IRQ_HANDLED; |
de85422b | 2452 | |
de85422b | 2453 | return rc; |
1da177e4 | 2454 | } |
43b86af8 | 2455 | EXPORT_SYMBOL_GPL(usb_hcd_irq); |
1da177e4 LT |
2456 | |
2457 | /*-------------------------------------------------------------------------*/ | |
2458 | ||
2459 | /** | |
2460 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) | |
2461 | * @hcd: pointer to the HCD representing the controller | |
2462 | * | |
2463 | * This is called by bus glue to report a USB host controller that died | |
2464 | * while operations may still have been pending. It's called automatically | |
c5635437 SS |
2465 | * by the PCI glue, so only glue for non-PCI busses should need to call it. |
2466 | * | |
2467 | * Only call this function with the primary HCD. | |
1da177e4 LT |
2468 | */ |
2469 | void usb_hc_died (struct usb_hcd *hcd) | |
2470 | { | |
2471 | unsigned long flags; | |
2472 | ||
2473 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); | |
2474 | ||
2475 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
9b37596a AS |
2476 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
2477 | set_bit(HCD_FLAG_DEAD, &hcd->flags); | |
1da177e4 | 2478 | if (hcd->rh_registered) { |
541c7d43 | 2479 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1da177e4 | 2480 | |
37ebb549 | 2481 | /* make hub_wq clean up old urbs and devices */ |
1da177e4 LT |
2482 | usb_set_device_state (hcd->self.root_hub, |
2483 | USB_STATE_NOTATTACHED); | |
59d48b3f | 2484 | usb_kick_hub_wq(hcd->self.root_hub); |
1da177e4 | 2485 | } |
c5635437 SS |
2486 | if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { |
2487 | hcd = hcd->shared_hcd; | |
cd5a6a4f RW |
2488 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
2489 | set_bit(HCD_FLAG_DEAD, &hcd->flags); | |
c5635437 SS |
2490 | if (hcd->rh_registered) { |
2491 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
2492 | ||
37ebb549 | 2493 | /* make hub_wq clean up old urbs and devices */ |
c5635437 SS |
2494 | usb_set_device_state(hcd->self.root_hub, |
2495 | USB_STATE_NOTATTACHED); | |
59d48b3f | 2496 | usb_kick_hub_wq(hcd->self.root_hub); |
c5635437 SS |
2497 | } |
2498 | } | |
1da177e4 | 2499 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
c5635437 | 2500 | /* Make sure that the other roothub is also deallocated. */ |
1da177e4 LT |
2501 | } |
2502 | EXPORT_SYMBOL_GPL (usb_hc_died); | |
2503 | ||
2504 | /*-------------------------------------------------------------------------*/ | |
2505 | ||
94dfd7ed ML |
2506 | static void init_giveback_urb_bh(struct giveback_urb_bh *bh) |
2507 | { | |
2508 | ||
2509 | spin_lock_init(&bh->lock); | |
2510 | INIT_LIST_HEAD(&bh->head); | |
2511 | tasklet_init(&bh->bh, usb_giveback_urb_bh, (unsigned long)bh); | |
2512 | } | |
2513 | ||
a8c06e40 AB |
2514 | struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver, |
2515 | struct device *sysdev, struct device *dev, const char *bus_name, | |
c5635437 | 2516 | struct usb_hcd *primary_hcd) |
1da177e4 LT |
2517 | { |
2518 | struct usb_hcd *hcd; | |
2519 | ||
7b842b6e | 2520 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
36af2db8 | 2521 | if (!hcd) |
1da177e4 | 2522 | return NULL; |
c5635437 | 2523 | if (primary_hcd == NULL) { |
feb26ac3 CB |
2524 | hcd->address0_mutex = kmalloc(sizeof(*hcd->address0_mutex), |
2525 | GFP_KERNEL); | |
2526 | if (!hcd->address0_mutex) { | |
2527 | kfree(hcd); | |
2528 | dev_dbg(dev, "hcd address0 mutex alloc failed\n"); | |
2529 | return NULL; | |
2530 | } | |
2531 | mutex_init(hcd->address0_mutex); | |
c5635437 SS |
2532 | hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), |
2533 | GFP_KERNEL); | |
2534 | if (!hcd->bandwidth_mutex) { | |
1a744d2e | 2535 | kfree(hcd->address0_mutex); |
c5635437 SS |
2536 | kfree(hcd); |
2537 | dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); | |
2538 | return NULL; | |
2539 | } | |
2540 | mutex_init(hcd->bandwidth_mutex); | |
2541 | dev_set_drvdata(dev, hcd); | |
2542 | } else { | |
d8521afe | 2543 | mutex_lock(&usb_port_peer_mutex); |
feb26ac3 | 2544 | hcd->address0_mutex = primary_hcd->address0_mutex; |
c5635437 SS |
2545 | hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; |
2546 | hcd->primary_hcd = primary_hcd; | |
2547 | primary_hcd->primary_hcd = primary_hcd; | |
2548 | hcd->shared_hcd = primary_hcd; | |
2549 | primary_hcd->shared_hcd = hcd; | |
d8521afe | 2550 | mutex_unlock(&usb_port_peer_mutex); |
d673bfcb | 2551 | } |
d673bfcb | 2552 | |
17200583 | 2553 | kref_init(&hcd->kref); |
1da177e4 LT |
2554 | |
2555 | usb_bus_init(&hcd->self); | |
1da177e4 | 2556 | hcd->self.controller = dev; |
a8c06e40 | 2557 | hcd->self.sysdev = sysdev; |
1da177e4 | 2558 | hcd->self.bus_name = bus_name; |
a8c06e40 | 2559 | hcd->self.uses_dma = (sysdev->dma_mask != NULL); |
1da177e4 LT |
2560 | |
2561 | init_timer(&hcd->rh_timer); | |
d5926ae7 AS |
2562 | hcd->rh_timer.function = rh_timer_func; |
2563 | hcd->rh_timer.data = (unsigned long) hcd; | |
ceb6c9c8 | 2564 | #ifdef CONFIG_PM |
6b157c9b AS |
2565 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); |
2566 | #endif | |
1da177e4 LT |
2567 | |
2568 | hcd->driver = driver; | |
83de4b2b | 2569 | hcd->speed = driver->flags & HCD_MASK; |
1da177e4 LT |
2570 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : |
2571 | "USB Host Controller"; | |
1da177e4 LT |
2572 | return hcd; |
2573 | } | |
a8c06e40 AB |
2574 | EXPORT_SYMBOL_GPL(__usb_create_hcd); |
2575 | ||
2576 | /** | |
2577 | * usb_create_shared_hcd - create and initialize an HCD structure | |
2578 | * @driver: HC driver that will use this hcd | |
2579 | * @dev: device for this HC, stored in hcd->self.controller | |
2580 | * @bus_name: value to store in hcd->self.bus_name | |
2581 | * @primary_hcd: a pointer to the usb_hcd structure that is sharing the | |
2582 | * PCI device. Only allocate certain resources for the primary HCD | |
2583 | * Context: !in_interrupt() | |
2584 | * | |
2585 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2586 | * HC driver's private data. Initialize the generic members of the | |
2587 | * hcd structure. | |
2588 | * | |
2589 | * Return: On success, a pointer to the created and initialized HCD structure. | |
2590 | * On failure (e.g. if memory is unavailable), %NULL. | |
2591 | */ | |
2592 | struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, | |
2593 | struct device *dev, const char *bus_name, | |
2594 | struct usb_hcd *primary_hcd) | |
2595 | { | |
2596 | return __usb_create_hcd(driver, dev, dev, bus_name, primary_hcd); | |
2597 | } | |
c5635437 SS |
2598 | EXPORT_SYMBOL_GPL(usb_create_shared_hcd); |
2599 | ||
2600 | /** | |
2601 | * usb_create_hcd - create and initialize an HCD structure | |
2602 | * @driver: HC driver that will use this hcd | |
2603 | * @dev: device for this HC, stored in hcd->self.controller | |
2604 | * @bus_name: value to store in hcd->self.bus_name | |
2605 | * Context: !in_interrupt() | |
2606 | * | |
2607 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2608 | * HC driver's private data. Initialize the generic members of the | |
2609 | * hcd structure. | |
2610 | * | |
626f090c YB |
2611 | * Return: On success, a pointer to the created and initialized HCD |
2612 | * structure. On failure (e.g. if memory is unavailable), %NULL. | |
c5635437 SS |
2613 | */ |
2614 | struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, | |
2615 | struct device *dev, const char *bus_name) | |
2616 | { | |
a8c06e40 | 2617 | return __usb_create_hcd(driver, dev, dev, bus_name, NULL); |
c5635437 | 2618 | } |
782e70c6 | 2619 | EXPORT_SYMBOL_GPL(usb_create_hcd); |
1da177e4 | 2620 | |
c5635437 SS |
2621 | /* |
2622 | * Roothubs that share one PCI device must also share the bandwidth mutex. | |
2623 | * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is | |
2624 | * deallocated. | |
2625 | * | |
ab2a4bf8 AS |
2626 | * Make sure to deallocate the bandwidth_mutex only when the last HCD is |
2627 | * freed. When hcd_release() is called for either hcd in a peer set, | |
2628 | * invalidate the peer's ->shared_hcd and ->primary_hcd pointers. | |
c5635437 | 2629 | */ |
d8521afe | 2630 | static void hcd_release(struct kref *kref) |
17200583 AS |
2631 | { |
2632 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); | |
2633 | ||
d8521afe | 2634 | mutex_lock(&usb_port_peer_mutex); |
d8521afe DW |
2635 | if (hcd->shared_hcd) { |
2636 | struct usb_hcd *peer = hcd->shared_hcd; | |
2637 | ||
2638 | peer->shared_hcd = NULL; | |
ab2a4bf8 AS |
2639 | peer->primary_hcd = NULL; |
2640 | } else { | |
2641 | kfree(hcd->address0_mutex); | |
2642 | kfree(hcd->bandwidth_mutex); | |
d8521afe DW |
2643 | } |
2644 | mutex_unlock(&usb_port_peer_mutex); | |
17200583 AS |
2645 | kfree(hcd); |
2646 | } | |
2647 | ||
2648 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) | |
2649 | { | |
2650 | if (hcd) | |
2651 | kref_get (&hcd->kref); | |
2652 | return hcd; | |
2653 | } | |
782e70c6 | 2654 | EXPORT_SYMBOL_GPL(usb_get_hcd); |
17200583 | 2655 | |
1da177e4 LT |
2656 | void usb_put_hcd (struct usb_hcd *hcd) |
2657 | { | |
17200583 AS |
2658 | if (hcd) |
2659 | kref_put (&hcd->kref, hcd_release); | |
1da177e4 | 2660 | } |
782e70c6 | 2661 | EXPORT_SYMBOL_GPL(usb_put_hcd); |
1da177e4 | 2662 | |
c5635437 SS |
2663 | int usb_hcd_is_primary_hcd(struct usb_hcd *hcd) |
2664 | { | |
2665 | if (!hcd->primary_hcd) | |
2666 | return 1; | |
2667 | return hcd == hcd->primary_hcd; | |
2668 | } | |
2669 | EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); | |
2670 | ||
3f5eb141 LT |
2671 | int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1) |
2672 | { | |
2673 | if (!hcd->driver->find_raw_port_number) | |
2674 | return port1; | |
2675 | ||
2676 | return hcd->driver->find_raw_port_number(hcd, port1); | |
2677 | } | |
2678 | ||
23e0d106 SS |
2679 | static int usb_hcd_request_irqs(struct usb_hcd *hcd, |
2680 | unsigned int irqnum, unsigned long irqflags) | |
2681 | { | |
2682 | int retval; | |
2683 | ||
2684 | if (hcd->driver->irq) { | |
e592c5d0 | 2685 | |
23e0d106 SS |
2686 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", |
2687 | hcd->driver->description, hcd->self.busnum); | |
2688 | retval = request_irq(irqnum, &usb_hcd_irq, irqflags, | |
2689 | hcd->irq_descr, hcd); | |
2690 | if (retval != 0) { | |
2691 | dev_err(hcd->self.controller, | |
2692 | "request interrupt %d failed\n", | |
2693 | irqnum); | |
2694 | return retval; | |
2695 | } | |
2696 | hcd->irq = irqnum; | |
2697 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, | |
2698 | (hcd->driver->flags & HCD_MEMORY) ? | |
2699 | "io mem" : "io base", | |
2700 | (unsigned long long)hcd->rsrc_start); | |
2701 | } else { | |
cd70469d | 2702 | hcd->irq = 0; |
23e0d106 SS |
2703 | if (hcd->rsrc_start) |
2704 | dev_info(hcd->self.controller, "%s 0x%08llx\n", | |
2705 | (hcd->driver->flags & HCD_MEMORY) ? | |
2706 | "io mem" : "io base", | |
2707 | (unsigned long long)hcd->rsrc_start); | |
2708 | } | |
2709 | return 0; | |
2710 | } | |
2711 | ||
d8521afe DW |
2712 | /* |
2713 | * Before we free this root hub, flush in-flight peering attempts | |
2714 | * and disable peer lookups | |
2715 | */ | |
2716 | static void usb_put_invalidate_rhdev(struct usb_hcd *hcd) | |
2717 | { | |
2718 | struct usb_device *rhdev; | |
2719 | ||
2720 | mutex_lock(&usb_port_peer_mutex); | |
2721 | rhdev = hcd->self.root_hub; | |
2722 | hcd->self.root_hub = NULL; | |
2723 | mutex_unlock(&usb_port_peer_mutex); | |
2724 | usb_put_dev(rhdev); | |
2725 | } | |
2726 | ||
1da177e4 LT |
2727 | /** |
2728 | * usb_add_hcd - finish generic HCD structure initialization and register | |
2729 | * @hcd: the usb_hcd structure to initialize | |
2730 | * @irqnum: Interrupt line to allocate | |
2731 | * @irqflags: Interrupt type flags | |
2732 | * | |
2733 | * Finish the remaining parts of generic HCD initialization: allocate the | |
2734 | * buffers of consistent memory, register the bus, request the IRQ line, | |
2735 | * and call the driver's reset() and start() routines. | |
2736 | */ | |
2737 | int usb_add_hcd(struct usb_hcd *hcd, | |
2738 | unsigned int irqnum, unsigned long irqflags) | |
2739 | { | |
8ec8d20b AS |
2740 | int retval; |
2741 | struct usb_device *rhdev; | |
1da177e4 | 2742 | |
3d46e73d | 2743 | if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->usb_phy) { |
a8c06e40 | 2744 | struct usb_phy *phy = usb_get_phy_dev(hcd->self.sysdev, 0); |
1ae5799e VB |
2745 | |
2746 | if (IS_ERR(phy)) { | |
2747 | retval = PTR_ERR(phy); | |
2748 | if (retval == -EPROBE_DEFER) | |
2749 | return retval; | |
2750 | } else { | |
2751 | retval = usb_phy_init(phy); | |
2752 | if (retval) { | |
2753 | usb_put_phy(phy); | |
2754 | return retval; | |
2755 | } | |
3d46e73d | 2756 | hcd->usb_phy = phy; |
1ae5799e VB |
2757 | hcd->remove_phy = 1; |
2758 | } | |
2759 | } | |
2760 | ||
ef44cb42 | 2761 | if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) { |
a8c06e40 | 2762 | struct phy *phy = phy_get(hcd->self.sysdev, "usb"); |
00433254 SS |
2763 | |
2764 | if (IS_ERR(phy)) { | |
2765 | retval = PTR_ERR(phy); | |
2766 | if (retval == -EPROBE_DEFER) | |
2767 | goto err_phy; | |
2768 | } else { | |
2769 | retval = phy_init(phy); | |
2770 | if (retval) { | |
2771 | phy_put(phy); | |
2772 | goto err_phy; | |
2773 | } | |
2774 | retval = phy_power_on(phy); | |
2775 | if (retval) { | |
2776 | phy_exit(phy); | |
2777 | phy_put(phy); | |
2778 | goto err_phy; | |
2779 | } | |
2780 | hcd->phy = phy; | |
ef44cb42 | 2781 | hcd->remove_phy = 1; |
00433254 SS |
2782 | } |
2783 | } | |
2784 | ||
1da177e4 LT |
2785 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); |
2786 | ||
c4fc2342 | 2787 | /* Keep old behaviour if authorized_default is not in [0, 1]. */ |
ff8e2c56 SK |
2788 | if (authorized_default < 0 || authorized_default > 1) { |
2789 | if (hcd->wireless) | |
2790 | clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); | |
2791 | else | |
2792 | set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); | |
2793 | } else { | |
2794 | if (authorized_default) | |
2795 | set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); | |
2796 | else | |
2797 | clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags); | |
2798 | } | |
8de98402 BH |
2799 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
2800 | ||
6b2bd3c8 SK |
2801 | /* per default all interfaces are authorized */ |
2802 | set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags); | |
2803 | ||
b1e8f0a6 | 2804 | /* HC is in reset state, but accessible. Now do the one-time init, |
37ebb549 | 2805 | * bottom up so that hcds can customize the root hubs before hub_wq |
b1e8f0a6 DB |
2806 | * starts talking to them. (Note, bus id is assigned early too.) |
2807 | */ | |
0faaad46 KB |
2808 | retval = hcd_buffer_create(hcd); |
2809 | if (retval != 0) { | |
a8c06e40 | 2810 | dev_dbg(hcd->self.sysdev, "pool alloc failed\n"); |
00433254 | 2811 | goto err_create_buf; |
1da177e4 LT |
2812 | } |
2813 | ||
0faaad46 KB |
2814 | retval = usb_register_bus(&hcd->self); |
2815 | if (retval < 0) | |
8ec8d20b | 2816 | goto err_register_bus; |
1da177e4 | 2817 | |
c688d621 GKH |
2818 | rhdev = usb_alloc_dev(NULL, &hcd->self, 0); |
2819 | if (rhdev == NULL) { | |
a8c06e40 | 2820 | dev_err(hcd->self.sysdev, "unable to allocate root hub\n"); |
b1e8f0a6 DB |
2821 | retval = -ENOMEM; |
2822 | goto err_allocate_root_hub; | |
2823 | } | |
d8521afe | 2824 | mutex_lock(&usb_port_peer_mutex); |
6d88e679 | 2825 | hcd->self.root_hub = rhdev; |
d8521afe | 2826 | mutex_unlock(&usb_port_peer_mutex); |
6b403b02 | 2827 | |
83de4b2b | 2828 | switch (hcd->speed) { |
6b403b02 SS |
2829 | case HCD_USB11: |
2830 | rhdev->speed = USB_SPEED_FULL; | |
2831 | break; | |
2832 | case HCD_USB2: | |
2833 | rhdev->speed = USB_SPEED_HIGH; | |
2834 | break; | |
1a81f881 TP |
2835 | case HCD_USB25: |
2836 | rhdev->speed = USB_SPEED_WIRELESS; | |
2837 | break; | |
6b403b02 SS |
2838 | case HCD_USB3: |
2839 | rhdev->speed = USB_SPEED_SUPER; | |
2840 | break; | |
5f9c3a66 MN |
2841 | case HCD_USB31: |
2842 | rhdev->speed = USB_SPEED_SUPER_PLUS; | |
2843 | break; | |
6b403b02 | 2844 | default: |
1d15ee4c | 2845 | retval = -EINVAL; |
96e077ae | 2846 | goto err_set_rh_speed; |
6b403b02 | 2847 | } |
b1e8f0a6 | 2848 | |
db4cefaa DB |
2849 | /* wakeup flag init defaults to "everything works" for root hubs, |
2850 | * but drivers can override it in reset() if needed, along with | |
2851 | * recording the overall controller's system wakeup capability. | |
2852 | */ | |
a6eeeb9f | 2853 | device_set_wakeup_capable(&rhdev->dev, 1); |
db4cefaa | 2854 | |
9b37596a AS |
2855 | /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is |
2856 | * registered. But since the controller can die at any time, | |
2857 | * let's initialize the flag before touching the hardware. | |
2858 | */ | |
2859 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2860 | ||
b1e8f0a6 DB |
2861 | /* "reset" is misnamed; its role is now one-time init. the controller |
2862 | * should already have been reset (and boot firmware kicked off etc). | |
2863 | */ | |
0faaad46 KB |
2864 | if (hcd->driver->reset) { |
2865 | retval = hcd->driver->reset(hcd); | |
2866 | if (retval < 0) { | |
2867 | dev_err(hcd->self.controller, "can't setup: %d\n", | |
2868 | retval); | |
2869 | goto err_hcd_driver_setup; | |
2870 | } | |
b1e8f0a6 | 2871 | } |
6d88e679 | 2872 | hcd->rh_pollable = 1; |
b1e8f0a6 | 2873 | |
fb669cc0 DB |
2874 | /* NOTE: root hub and controller capabilities may not be the same */ |
2875 | if (device_can_wakeup(hcd->self.controller) | |
2876 | && device_can_wakeup(&hcd->self.root_hub->dev)) | |
b1e8f0a6 | 2877 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
b1e8f0a6 | 2878 | |
94dfd7ed ML |
2879 | /* initialize tasklets */ |
2880 | init_giveback_urb_bh(&hcd->high_prio_bh); | |
2881 | init_giveback_urb_bh(&hcd->low_prio_bh); | |
2882 | ||
68d07f64 SS |
2883 | /* enable irqs just before we start the controller, |
2884 | * if the BIOS provides legacy PCI irqs. | |
2885 | */ | |
2886 | if (usb_hcd_is_primary_hcd(hcd) && irqnum) { | |
c5635437 SS |
2887 | retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); |
2888 | if (retval) | |
2889 | goto err_request_irq; | |
2890 | } | |
1da177e4 | 2891 | |
4814030c | 2892 | hcd->state = HC_STATE_RUNNING; |
abc4f9b0 SS |
2893 | retval = hcd->driver->start(hcd); |
2894 | if (retval < 0) { | |
1da177e4 | 2895 | dev_err(hcd->self.controller, "startup error %d\n", retval); |
8ec8d20b | 2896 | goto err_hcd_driver_start; |
1da177e4 LT |
2897 | } |
2898 | ||
b1e8f0a6 | 2899 | /* starting here, usbcore will pay attention to this root hub */ |
0faaad46 KB |
2900 | retval = register_root_hub(hcd); |
2901 | if (retval != 0) | |
8ec8d20b AS |
2902 | goto err_register_root_hub; |
2903 | ||
5234ce1b IPG |
2904 | retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
2905 | if (retval < 0) { | |
2906 | printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", | |
2907 | retval); | |
2908 | goto error_create_attr_group; | |
2909 | } | |
541c7d43 | 2910 | if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) |
d5926ae7 | 2911 | usb_hcd_poll_rh_status(hcd); |
a6eeeb9f | 2912 | |
1da177e4 LT |
2913 | return retval; |
2914 | ||
5234ce1b | 2915 | error_create_attr_group: |
9b37596a | 2916 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
96e077ae AS |
2917 | if (HC_IS_RUNNING(hcd->state)) |
2918 | hcd->state = HC_STATE_QUIESCING; | |
2919 | spin_lock_irq(&hcd_root_hub_lock); | |
2920 | hcd->rh_registered = 0; | |
2921 | spin_unlock_irq(&hcd_root_hub_lock); | |
2922 | ||
ceb6c9c8 | 2923 | #ifdef CONFIG_PM |
96e077ae AS |
2924 | cancel_work_sync(&hcd->wakeup_work); |
2925 | #endif | |
a4b5d606 | 2926 | mutex_lock(&usb_bus_idr_lock); |
6d88e679 | 2927 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
a4b5d606 | 2928 | mutex_unlock(&usb_bus_idr_lock); |
b1e8f0a6 | 2929 | err_register_root_hub: |
6d88e679 | 2930 | hcd->rh_pollable = 0; |
541c7d43 | 2931 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 | 2932 | del_timer_sync(&hcd->rh_timer); |
8ec8d20b | 2933 | hcd->driver->stop(hcd); |
96e077ae | 2934 | hcd->state = HC_STATE_HALT; |
541c7d43 | 2935 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
96e077ae | 2936 | del_timer_sync(&hcd->rh_timer); |
b1e8f0a6 | 2937 | err_hcd_driver_start: |
cd70469d | 2938 | if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) |
1da177e4 | 2939 | free_irq(irqnum, hcd); |
b1e8f0a6 DB |
2940 | err_request_irq: |
2941 | err_hcd_driver_setup: | |
96e077ae | 2942 | err_set_rh_speed: |
d8521afe | 2943 | usb_put_invalidate_rhdev(hcd); |
b1e8f0a6 | 2944 | err_allocate_root_hub: |
1da177e4 | 2945 | usb_deregister_bus(&hcd->self); |
b1e8f0a6 | 2946 | err_register_bus: |
1da177e4 | 2947 | hcd_buffer_destroy(hcd); |
00433254 | 2948 | err_create_buf: |
ef44cb42 | 2949 | if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) { |
00433254 SS |
2950 | phy_power_off(hcd->phy); |
2951 | phy_exit(hcd->phy); | |
2952 | phy_put(hcd->phy); | |
2953 | hcd->phy = NULL; | |
2954 | } | |
2955 | err_phy: | |
3d46e73d AT |
2956 | if (hcd->remove_phy && hcd->usb_phy) { |
2957 | usb_phy_shutdown(hcd->usb_phy); | |
2958 | usb_put_phy(hcd->usb_phy); | |
2959 | hcd->usb_phy = NULL; | |
103e127d | 2960 | } |
1da177e4 | 2961 | return retval; |
14557359 | 2962 | } |
782e70c6 | 2963 | EXPORT_SYMBOL_GPL(usb_add_hcd); |
1da177e4 LT |
2964 | |
2965 | /** | |
2966 | * usb_remove_hcd - shutdown processing for generic HCDs | |
2967 | * @hcd: the usb_hcd structure to remove | |
2968 | * Context: !in_interrupt() | |
2969 | * | |
2970 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), | |
2971 | * invoking the HCD's stop() method. | |
2972 | */ | |
2973 | void usb_remove_hcd(struct usb_hcd *hcd) | |
2974 | { | |
6d88e679 AS |
2975 | struct usb_device *rhdev = hcd->self.root_hub; |
2976 | ||
1da177e4 LT |
2977 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); |
2978 | ||
6d88e679 AS |
2979 | usb_get_dev(rhdev); |
2980 | sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); | |
96e077ae | 2981 | |
9b37596a | 2982 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
1da177e4 LT |
2983 | if (HC_IS_RUNNING (hcd->state)) |
2984 | hcd->state = HC_STATE_QUIESCING; | |
2985 | ||
2986 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); | |
2987 | spin_lock_irq (&hcd_root_hub_lock); | |
2988 | hcd->rh_registered = 0; | |
2989 | spin_unlock_irq (&hcd_root_hub_lock); | |
9ad3d6cc | 2990 | |
ceb6c9c8 | 2991 | #ifdef CONFIG_PM |
d5d4db70 | 2992 | cancel_work_sync(&hcd->wakeup_work); |
6b157c9b AS |
2993 | #endif |
2994 | ||
a4b5d606 | 2995 | mutex_lock(&usb_bus_idr_lock); |
6d88e679 | 2996 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
a4b5d606 | 2997 | mutex_unlock(&usb_bus_idr_lock); |
1da177e4 | 2998 | |
94dfd7ed ML |
2999 | /* |
3000 | * tasklet_kill() isn't needed here because: | |
3001 | * - driver's disconnect() called from usb_disconnect() should | |
3002 | * make sure its URBs are completed during the disconnect() | |
3003 | * callback | |
3004 | * | |
3005 | * - it is too late to run complete() here since driver may have | |
3006 | * been removed already now | |
3007 | */ | |
3008 | ||
6d88e679 AS |
3009 | /* Prevent any more root-hub status calls from the timer. |
3010 | * The HCD might still restart the timer (if a port status change | |
3011 | * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke | |
3012 | * the hub_status_data() callback. | |
3013 | */ | |
3014 | hcd->rh_pollable = 0; | |
541c7d43 | 3015 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 AS |
3016 | del_timer_sync(&hcd->rh_timer); |
3017 | ||
1da177e4 LT |
3018 | hcd->driver->stop(hcd); |
3019 | hcd->state = HC_STATE_HALT; | |
3020 | ||
6d88e679 | 3021 | /* In case the HCD restarted the timer, stop it again. */ |
541c7d43 | 3022 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1b42ae6d AS |
3023 | del_timer_sync(&hcd->rh_timer); |
3024 | ||
c5635437 | 3025 | if (usb_hcd_is_primary_hcd(hcd)) { |
cd70469d | 3026 | if (hcd->irq > 0) |
c5635437 SS |
3027 | free_irq(hcd->irq, hcd); |
3028 | } | |
6d88e679 | 3029 | |
1da177e4 LT |
3030 | usb_deregister_bus(&hcd->self); |
3031 | hcd_buffer_destroy(hcd); | |
00433254 | 3032 | |
ef44cb42 | 3033 | if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) { |
00433254 SS |
3034 | phy_power_off(hcd->phy); |
3035 | phy_exit(hcd->phy); | |
3036 | phy_put(hcd->phy); | |
3037 | hcd->phy = NULL; | |
3038 | } | |
3d46e73d AT |
3039 | if (hcd->remove_phy && hcd->usb_phy) { |
3040 | usb_phy_shutdown(hcd->usb_phy); | |
3041 | usb_put_phy(hcd->usb_phy); | |
3042 | hcd->usb_phy = NULL; | |
103e127d | 3043 | } |
d8521afe DW |
3044 | |
3045 | usb_put_invalidate_rhdev(hcd); | |
76b8db0d | 3046 | hcd->flags = 0; |
1da177e4 | 3047 | } |
782e70c6 | 3048 | EXPORT_SYMBOL_GPL(usb_remove_hcd); |
1da177e4 | 3049 | |
64a21d02 | 3050 | void |
842c1960 | 3051 | usb_hcd_platform_shutdown(struct platform_device *dev) |
64a21d02 AG |
3052 | { |
3053 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
3054 | ||
3055 | if (hcd->driver->shutdown) | |
3056 | hcd->driver->shutdown(hcd); | |
3057 | } | |
782e70c6 | 3058 | EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); |
64a21d02 | 3059 | |
1da177e4 LT |
3060 | /*-------------------------------------------------------------------------*/ |
3061 | ||
f7b7f375 | 3062 | #if IS_ENABLED(CONFIG_USB_MON) |
1da177e4 | 3063 | |
6fb8ac81 | 3064 | const struct usb_mon_operations *mon_ops; |
1da177e4 LT |
3065 | |
3066 | /* | |
3067 | * The registration is unlocked. | |
3068 | * We do it this way because we do not want to lock in hot paths. | |
3069 | * | |
3070 | * Notice that the code is minimally error-proof. Because usbmon needs | |
3071 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. | |
3072 | */ | |
14557359 | 3073 | |
6fb8ac81 | 3074 | int usb_mon_register(const struct usb_mon_operations *ops) |
1da177e4 LT |
3075 | { |
3076 | ||
3077 | if (mon_ops) | |
3078 | return -EBUSY; | |
3079 | ||
3080 | mon_ops = ops; | |
3081 | mb(); | |
3082 | return 0; | |
3083 | } | |
3084 | EXPORT_SYMBOL_GPL (usb_mon_register); | |
3085 | ||
3086 | void usb_mon_deregister (void) | |
3087 | { | |
3088 | ||
3089 | if (mon_ops == NULL) { | |
3090 | printk(KERN_ERR "USB: monitor was not registered\n"); | |
3091 | return; | |
3092 | } | |
3093 | mon_ops = NULL; | |
3094 | mb(); | |
3095 | } | |
3096 | EXPORT_SYMBOL_GPL (usb_mon_deregister); | |
3097 | ||
f150fa1a | 3098 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |