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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> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/completion.h> | |
31 | #include <linux/utsname.h> | |
32 | #include <linux/mm.h> | |
33 | #include <asm/io.h> | |
1da177e4 LT |
34 | #include <linux/device.h> |
35 | #include <linux/dma-mapping.h> | |
4186ecf8 | 36 | #include <linux/mutex.h> |
1da177e4 LT |
37 | #include <asm/irq.h> |
38 | #include <asm/byteorder.h> | |
b3476675 | 39 | #include <asm/unaligned.h> |
64a21d02 | 40 | #include <linux/platform_device.h> |
6b157c9b | 41 | #include <linux/workqueue.h> |
da0aa716 | 42 | #include <linux/pm_runtime.h> |
059239ad | 43 | #include <linux/types.h> |
1da177e4 LT |
44 | |
45 | #include <linux/usb.h> | |
27729aad | 46 | #include <linux/usb/hcd.h> |
103e127d | 47 | #include <linux/usb/phy.h> |
1da177e4 LT |
48 | |
49 | #include "usb.h" | |
1da177e4 LT |
50 | |
51 | ||
1da177e4 LT |
52 | /*-------------------------------------------------------------------------*/ |
53 | ||
54 | /* | |
55 | * USB Host Controller Driver framework | |
56 | * | |
57 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing | |
58 | * HCD-specific behaviors/bugs. | |
59 | * | |
60 | * This does error checks, tracks devices and urbs, and delegates to a | |
61 | * "hc_driver" only for code (and data) that really needs to know about | |
62 | * hardware differences. That includes root hub registers, i/o queues, | |
63 | * and so on ... but as little else as possible. | |
64 | * | |
65 | * Shared code includes most of the "root hub" code (these are emulated, | |
66 | * though each HC's hardware works differently) and PCI glue, plus request | |
67 | * tracking overhead. The HCD code should only block on spinlocks or on | |
68 | * hardware handshaking; blocking on software events (such as other kernel | |
69 | * threads releasing resources, or completing actions) is all generic. | |
70 | * | |
71 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", | |
72 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used | |
73 | * only by the hub driver ... and that neither should be seen or used by | |
74 | * usb client device drivers. | |
75 | * | |
76 | * Contributors of ideas or unattributed patches include: David Brownell, | |
77 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... | |
78 | * | |
79 | * HISTORY: | |
80 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some | |
81 | * associated cleanup. "usb_hcd" still != "usb_bus". | |
82 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. | |
83 | */ | |
84 | ||
85 | /*-------------------------------------------------------------------------*/ | |
86 | ||
9beeee65 AS |
87 | /* Keep track of which host controller drivers are loaded */ |
88 | unsigned long usb_hcds_loaded; | |
89 | EXPORT_SYMBOL_GPL(usb_hcds_loaded); | |
90 | ||
1da177e4 LT |
91 | /* host controllers we manage */ |
92 | LIST_HEAD (usb_bus_list); | |
93 | EXPORT_SYMBOL_GPL (usb_bus_list); | |
94 | ||
95 | /* used when allocating bus numbers */ | |
96 | #define USB_MAXBUS 64 | |
059239ad | 97 | static DECLARE_BITMAP(busmap, USB_MAXBUS); |
1da177e4 LT |
98 | |
99 | /* used when updating list of hcds */ | |
4186ecf8 | 100 | DEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ |
1da177e4 LT |
101 | EXPORT_SYMBOL_GPL (usb_bus_list_lock); |
102 | ||
103 | /* used for controlling access to virtual root hubs */ | |
104 | static DEFINE_SPINLOCK(hcd_root_hub_lock); | |
105 | ||
809a58b8 AS |
106 | /* used when updating an endpoint's URB list */ |
107 | static DEFINE_SPINLOCK(hcd_urb_list_lock); | |
1da177e4 | 108 | |
cde217a5 AS |
109 | /* used to protect against unlinking URBs after the device is gone */ |
110 | static DEFINE_SPINLOCK(hcd_urb_unlink_lock); | |
111 | ||
1da177e4 LT |
112 | /* wait queue for synchronous unlinks */ |
113 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); | |
114 | ||
809a58b8 AS |
115 | static inline int is_root_hub(struct usb_device *udev) |
116 | { | |
117 | return (udev->parent == NULL); | |
118 | } | |
119 | ||
1da177e4 LT |
120 | /*-------------------------------------------------------------------------*/ |
121 | ||
122 | /* | |
123 | * Sharable chunks of root hub code. | |
124 | */ | |
125 | ||
126 | /*-------------------------------------------------------------------------*/ | |
b53d657d SAS |
127 | #define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff)) |
128 | #define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff)) | |
1da177e4 | 129 | |
d2e9b4d6 SS |
130 | /* usb 3.0 root hub device descriptor */ |
131 | static const u8 usb3_rh_dev_descriptor[18] = { | |
132 | 0x12, /* __u8 bLength; */ | |
133 | 0x01, /* __u8 bDescriptorType; Device */ | |
134 | 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ | |
135 | ||
136 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
137 | 0x00, /* __u8 bDeviceSubClass; */ | |
138 | 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ | |
139 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ | |
140 | ||
bfb8bfad | 141 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
cd780694 | 142 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ |
d2e9b4d6 SS |
143 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
144 | ||
145 | 0x03, /* __u8 iManufacturer; */ | |
146 | 0x02, /* __u8 iProduct; */ | |
147 | 0x01, /* __u8 iSerialNumber; */ | |
148 | 0x01 /* __u8 bNumConfigurations; */ | |
149 | }; | |
150 | ||
1a81f881 TP |
151 | /* usb 2.5 (wireless USB 1.0) root hub device descriptor */ |
152 | static const u8 usb25_rh_dev_descriptor[18] = { | |
153 | 0x12, /* __u8 bLength; */ | |
154 | 0x01, /* __u8 bDescriptorType; Device */ | |
155 | 0x50, 0x02, /* __le16 bcdUSB; v2.5 */ | |
156 | ||
157 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
158 | 0x00, /* __u8 bDeviceSubClass; */ | |
159 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ | |
160 | 0xFF, /* __u8 bMaxPacketSize0; always 0xFF (WUSB Spec 7.4.1). */ | |
161 | ||
162 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ | |
163 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ | |
164 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ | |
165 | ||
166 | 0x03, /* __u8 iManufacturer; */ | |
167 | 0x02, /* __u8 iProduct; */ | |
168 | 0x01, /* __u8 iSerialNumber; */ | |
169 | 0x01 /* __u8 bNumConfigurations; */ | |
170 | }; | |
171 | ||
1da177e4 | 172 | /* usb 2.0 root hub device descriptor */ |
14557359 | 173 | static const u8 usb2_rh_dev_descriptor[18] = { |
1da177e4 LT |
174 | 0x12, /* __u8 bLength; */ |
175 | 0x01, /* __u8 bDescriptorType; Device */ | |
176 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ | |
177 | ||
178 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
179 | 0x00, /* __u8 bDeviceSubClass; */ | |
7329e211 | 180 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
16f16d11 | 181 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 182 | |
bfb8bfad | 183 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
667d691e | 184 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
1da177e4 LT |
185 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
186 | ||
187 | 0x03, /* __u8 iManufacturer; */ | |
188 | 0x02, /* __u8 iProduct; */ | |
189 | 0x01, /* __u8 iSerialNumber; */ | |
190 | 0x01 /* __u8 bNumConfigurations; */ | |
191 | }; | |
192 | ||
193 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ | |
194 | ||
195 | /* usb 1.1 root hub device descriptor */ | |
14557359 | 196 | static const u8 usb11_rh_dev_descriptor[18] = { |
1da177e4 LT |
197 | 0x12, /* __u8 bLength; */ |
198 | 0x01, /* __u8 bDescriptorType; Device */ | |
199 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ | |
200 | ||
201 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
202 | 0x00, /* __u8 bDeviceSubClass; */ | |
203 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ | |
16f16d11 | 204 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 205 | |
bfb8bfad | 206 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
667d691e | 207 | 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ |
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 | ||
217 | /*-------------------------------------------------------------------------*/ | |
218 | ||
219 | /* Configuration descriptors for our root hubs */ | |
220 | ||
14557359 | 221 | static const u8 fs_rh_config_descriptor[] = { |
1da177e4 LT |
222 | |
223 | /* one configuration */ | |
224 | 0x09, /* __u8 bLength; */ | |
225 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
226 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
227 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
228 | 0x01, /* __u8 bConfigurationValue; */ | |
229 | 0x00, /* __u8 iConfiguration; */ | |
14557359 | 230 | 0xc0, /* __u8 bmAttributes; |
1da177e4 LT |
231 | Bit 7: must be set, |
232 | 6: Self-powered, | |
233 | 5: Remote wakeup, | |
234 | 4..0: resvd */ | |
235 | 0x00, /* __u8 MaxPower; */ | |
14557359 | 236 | |
1da177e4 LT |
237 | /* USB 1.1: |
238 | * USB 2.0, single TT organization (mandatory): | |
239 | * one interface, protocol 0 | |
240 | * | |
241 | * USB 2.0, multiple TT organization (optional): | |
242 | * two interfaces, protocols 1 (like single TT) | |
243 | * and 2 (multiple TT mode) ... config is | |
244 | * sometimes settable | |
245 | * NOT IMPLEMENTED | |
246 | */ | |
247 | ||
248 | /* one interface */ | |
249 | 0x09, /* __u8 if_bLength; */ | |
250 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
251 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
252 | 0x00, /* __u8 if_bAlternateSetting; */ | |
253 | 0x01, /* __u8 if_bNumEndpoints; */ | |
254 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
255 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
256 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
257 | 0x00, /* __u8 if_iInterface; */ | |
14557359 | 258 | |
1da177e4 LT |
259 | /* one endpoint (status change endpoint) */ |
260 | 0x07, /* __u8 ep_bLength; */ | |
261 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
262 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
14557359 MB |
263 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
264 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ | |
1da177e4 LT |
265 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ |
266 | }; | |
267 | ||
14557359 | 268 | static const u8 hs_rh_config_descriptor[] = { |
1da177e4 LT |
269 | |
270 | /* one configuration */ | |
271 | 0x09, /* __u8 bLength; */ | |
272 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
273 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
274 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
275 | 0x01, /* __u8 bConfigurationValue; */ | |
276 | 0x00, /* __u8 iConfiguration; */ | |
14557359 | 277 | 0xc0, /* __u8 bmAttributes; |
1da177e4 LT |
278 | Bit 7: must be set, |
279 | 6: Self-powered, | |
280 | 5: Remote wakeup, | |
281 | 4..0: resvd */ | |
282 | 0x00, /* __u8 MaxPower; */ | |
14557359 | 283 | |
1da177e4 LT |
284 | /* USB 1.1: |
285 | * USB 2.0, single TT organization (mandatory): | |
286 | * one interface, protocol 0 | |
287 | * | |
288 | * USB 2.0, multiple TT organization (optional): | |
289 | * two interfaces, protocols 1 (like single TT) | |
290 | * and 2 (multiple TT mode) ... config is | |
291 | * sometimes settable | |
292 | * NOT IMPLEMENTED | |
293 | */ | |
294 | ||
295 | /* one interface */ | |
296 | 0x09, /* __u8 if_bLength; */ | |
297 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
298 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
299 | 0x00, /* __u8 if_bAlternateSetting; */ | |
300 | 0x01, /* __u8 if_bNumEndpoints; */ | |
301 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
302 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
303 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
304 | 0x00, /* __u8 if_iInterface; */ | |
14557359 | 305 | |
1da177e4 LT |
306 | /* one endpoint (status change endpoint) */ |
307 | 0x07, /* __u8 ep_bLength; */ | |
308 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
309 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
14557359 | 310 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ |
88fafff9 | 311 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
312 | * see hub.c:hub_configure() for details. */ | |
313 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
1da177e4 LT |
314 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
315 | }; | |
316 | ||
d2e9b4d6 SS |
317 | static const u8 ss_rh_config_descriptor[] = { |
318 | /* one configuration */ | |
319 | 0x09, /* __u8 bLength; */ | |
320 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
22c6a35d | 321 | 0x1f, 0x00, /* __le16 wTotalLength; */ |
d2e9b4d6 SS |
322 | 0x01, /* __u8 bNumInterfaces; (1) */ |
323 | 0x01, /* __u8 bConfigurationValue; */ | |
324 | 0x00, /* __u8 iConfiguration; */ | |
325 | 0xc0, /* __u8 bmAttributes; | |
326 | Bit 7: must be set, | |
327 | 6: Self-powered, | |
328 | 5: Remote wakeup, | |
329 | 4..0: resvd */ | |
330 | 0x00, /* __u8 MaxPower; */ | |
331 | ||
332 | /* one interface */ | |
333 | 0x09, /* __u8 if_bLength; */ | |
334 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
335 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
336 | 0x00, /* __u8 if_bAlternateSetting; */ | |
337 | 0x01, /* __u8 if_bNumEndpoints; */ | |
338 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
339 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
340 | 0x00, /* __u8 if_bInterfaceProtocol; */ | |
341 | 0x00, /* __u8 if_iInterface; */ | |
342 | ||
343 | /* one endpoint (status change endpoint) */ | |
344 | 0x07, /* __u8 ep_bLength; */ | |
345 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
346 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
347 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
348 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) | |
349 | * see hub.c:hub_configure() for details. */ | |
350 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
22c6a35d SS |
351 | 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
352 | ||
353 | /* one SuperSpeed endpoint companion descriptor */ | |
354 | 0x06, /* __u8 ss_bLength */ | |
355 | 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ | |
356 | 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ | |
357 | 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ | |
358 | 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ | |
d2e9b4d6 SS |
359 | }; |
360 | ||
c4fc2342 CDH |
361 | /* authorized_default behaviour: |
362 | * -1 is authorized for all devices except wireless (old behaviour) | |
363 | * 0 is unauthorized for all devices | |
364 | * 1 is authorized for all devices | |
365 | */ | |
366 | static int authorized_default = -1; | |
367 | module_param(authorized_default, int, S_IRUGO|S_IWUSR); | |
368 | MODULE_PARM_DESC(authorized_default, | |
369 | "Default USB device authorization: 0 is not authorized, 1 is " | |
370 | "authorized, -1 is authorized except for wireless USB (default, " | |
371 | "old behaviour"); | |
1da177e4 LT |
372 | /*-------------------------------------------------------------------------*/ |
373 | ||
392ca68b GS |
374 | /** |
375 | * ascii2desc() - Helper routine for producing UTF-16LE string descriptors | |
376 | * @s: Null-terminated ASCII (actually ISO-8859-1) string | |
377 | * @buf: Buffer for USB string descriptor (header + UTF-16LE) | |
378 | * @len: Length (in bytes; may be odd) of descriptor buffer. | |
379 | * | |
626f090c YB |
380 | * Return: The number of bytes filled in: 2 + 2*strlen(s) or @len, |
381 | * whichever is less. | |
392ca68b | 382 | * |
626f090c | 383 | * Note: |
392ca68b GS |
384 | * USB String descriptors can contain at most 126 characters; input |
385 | * strings longer than that are truncated. | |
1da177e4 | 386 | */ |
392ca68b GS |
387 | static unsigned |
388 | ascii2desc(char const *s, u8 *buf, unsigned len) | |
1da177e4 | 389 | { |
392ca68b GS |
390 | unsigned n, t = 2 + 2*strlen(s); |
391 | ||
392 | if (t > 254) | |
393 | t = 254; /* Longest possible UTF string descriptor */ | |
394 | if (len > t) | |
395 | len = t; | |
396 | ||
397 | t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ | |
398 | ||
399 | n = len; | |
400 | while (n--) { | |
401 | *buf++ = t; | |
402 | if (!n--) | |
403 | break; | |
404 | *buf++ = t >> 8; | |
405 | t = (unsigned char)*s++; | |
1da177e4 | 406 | } |
392ca68b | 407 | return len; |
1da177e4 LT |
408 | } |
409 | ||
392ca68b GS |
410 | /** |
411 | * rh_string() - provides string descriptors for root hub | |
412 | * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) | |
1da177e4 | 413 | * @hcd: the host controller for this root hub |
392ca68b GS |
414 | * @data: buffer for output packet |
415 | * @len: length of the provided buffer | |
1da177e4 LT |
416 | * |
417 | * Produces either a manufacturer, product or serial number string for the | |
418 | * virtual root hub device. | |
626f090c YB |
419 | * |
420 | * Return: The number of bytes filled in: the length of the descriptor or | |
392ca68b | 421 | * of the provided buffer, whichever is less. |
1da177e4 | 422 | */ |
392ca68b GS |
423 | static unsigned |
424 | rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) | |
71d2718f | 425 | { |
392ca68b GS |
426 | char buf[100]; |
427 | char const *s; | |
428 | static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; | |
1da177e4 | 429 | |
048cb21c | 430 | /* language ids */ |
392ca68b GS |
431 | switch (id) { |
432 | case 0: | |
433 | /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ | |
434 | /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ | |
435 | if (len > 4) | |
436 | len = 4; | |
437 | memcpy(data, langids, len); | |
1da177e4 | 438 | return len; |
392ca68b GS |
439 | case 1: |
440 | /* Serial number */ | |
441 | s = hcd->self.bus_name; | |
442 | break; | |
443 | case 2: | |
444 | /* Product name */ | |
445 | s = hcd->product_desc; | |
446 | break; | |
447 | case 3: | |
448 | /* Manufacturer */ | |
96b644bd SH |
449 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
450 | init_utsname()->release, hcd->driver->description); | |
392ca68b GS |
451 | s = buf; |
452 | break; | |
1da177e4 | 453 | default: |
392ca68b GS |
454 | /* Can't happen; caller guarantees it */ |
455 | return 0; | |
1da177e4 | 456 | } |
392ca68b GS |
457 | |
458 | return ascii2desc(s, data, len); | |
1da177e4 LT |
459 | } |
460 | ||
461 | ||
462 | /* Root hub control transfers execute synchronously */ | |
463 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) | |
464 | { | |
465 | struct usb_ctrlrequest *cmd; | |
14557359 | 466 | u16 typeReq, wValue, wIndex, wLength; |
1da177e4 | 467 | u8 *ubuf = urb->transfer_buffer; |
71d2718f | 468 | unsigned len = 0; |
e9df41c5 | 469 | int status; |
7329e211 AS |
470 | u8 patch_wakeup = 0; |
471 | u8 patch_protocol = 0; | |
e57e780b SS |
472 | u16 tbuf_size; |
473 | u8 *tbuf = NULL; | |
474 | const u8 *bufp; | |
1da177e4 | 475 | |
9439eb94 AS |
476 | might_sleep(); |
477 | ||
e9df41c5 AS |
478 | spin_lock_irq(&hcd_root_hub_lock); |
479 | status = usb_hcd_link_urb_to_ep(hcd, urb); | |
480 | spin_unlock_irq(&hcd_root_hub_lock); | |
481 | if (status) | |
482 | return status; | |
b0d9efba | 483 | urb->hcpriv = hcd; /* Indicate it's queued */ |
e9df41c5 | 484 | |
1da177e4 LT |
485 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; |
486 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; | |
487 | wValue = le16_to_cpu (cmd->wValue); | |
488 | wIndex = le16_to_cpu (cmd->wIndex); | |
489 | wLength = le16_to_cpu (cmd->wLength); | |
490 | ||
491 | if (wLength > urb->transfer_buffer_length) | |
492 | goto error; | |
493 | ||
e57e780b SS |
494 | /* |
495 | * tbuf should be at least as big as the | |
496 | * USB hub descriptor. | |
497 | */ | |
498 | tbuf_size = max_t(u16, sizeof(struct usb_hub_descriptor), wLength); | |
499 | tbuf = kzalloc(tbuf_size, GFP_KERNEL); | |
500 | if (!tbuf) | |
501 | return -ENOMEM; | |
502 | ||
503 | bufp = tbuf; | |
504 | ||
505 | ||
1da177e4 LT |
506 | urb->actual_length = 0; |
507 | switch (typeReq) { | |
508 | ||
509 | /* DEVICE REQUESTS */ | |
510 | ||
fb669cc0 DB |
511 | /* The root hub's remote wakeup enable bit is implemented using |
512 | * driver model wakeup flags. If this system supports wakeup | |
513 | * through USB, userspace may change the default "allow wakeup" | |
514 | * policy through sysfs or these calls. | |
515 | * | |
516 | * Most root hubs support wakeup from downstream devices, for | |
517 | * runtime power management (disabling USB clocks and reducing | |
518 | * VBUS power usage). However, not all of them do so; silicon, | |
519 | * board, and BIOS bugs here are not uncommon, so these can't | |
520 | * be treated quite like external hubs. | |
521 | * | |
522 | * Likewise, not all root hubs will pass wakeup events upstream, | |
523 | * to wake up the whole system. So don't assume root hub and | |
524 | * controller capabilities are identical. | |
525 | */ | |
526 | ||
1da177e4 | 527 | case DeviceRequest | USB_REQ_GET_STATUS: |
14557359 | 528 | tbuf[0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
fb669cc0 | 529 | << USB_DEVICE_REMOTE_WAKEUP) |
1da177e4 | 530 | | (1 << USB_DEVICE_SELF_POWERED); |
14557359 | 531 | tbuf[1] = 0; |
1da177e4 LT |
532 | len = 2; |
533 | break; | |
534 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: | |
535 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) | |
fb669cc0 | 536 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
1da177e4 LT |
537 | else |
538 | goto error; | |
539 | break; | |
540 | case DeviceOutRequest | USB_REQ_SET_FEATURE: | |
fb669cc0 DB |
541 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
542 | && wValue == USB_DEVICE_REMOTE_WAKEUP) | |
543 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); | |
1da177e4 LT |
544 | else |
545 | goto error; | |
546 | break; | |
547 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: | |
14557359 | 548 | tbuf[0] = 1; |
1da177e4 LT |
549 | len = 1; |
550 | /* FALLTHROUGH */ | |
551 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: | |
552 | break; | |
553 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
554 | switch (wValue & 0xff00) { | |
555 | case USB_DT_DEVICE << 8: | |
83de4b2b | 556 | switch (hcd->speed) { |
7dd19e69 | 557 | case HCD_USB3: |
d2e9b4d6 | 558 | bufp = usb3_rh_dev_descriptor; |
7dd19e69 | 559 | break; |
1a81f881 TP |
560 | case HCD_USB25: |
561 | bufp = usb25_rh_dev_descriptor; | |
562 | break; | |
7dd19e69 | 563 | case HCD_USB2: |
1da177e4 | 564 | bufp = usb2_rh_dev_descriptor; |
7dd19e69 VM |
565 | break; |
566 | case HCD_USB11: | |
1da177e4 | 567 | bufp = usb11_rh_dev_descriptor; |
7dd19e69 VM |
568 | break; |
569 | default: | |
1da177e4 | 570 | goto error; |
7dd19e69 | 571 | } |
1da177e4 | 572 | len = 18; |
7329e211 AS |
573 | if (hcd->has_tt) |
574 | patch_protocol = 1; | |
1da177e4 LT |
575 | break; |
576 | case USB_DT_CONFIG << 8: | |
83de4b2b | 577 | switch (hcd->speed) { |
7dd19e69 | 578 | case HCD_USB3: |
d2e9b4d6 SS |
579 | bufp = ss_rh_config_descriptor; |
580 | len = sizeof ss_rh_config_descriptor; | |
7dd19e69 | 581 | break; |
1a81f881 | 582 | case HCD_USB25: |
7dd19e69 | 583 | case HCD_USB2: |
1da177e4 LT |
584 | bufp = hs_rh_config_descriptor; |
585 | len = sizeof hs_rh_config_descriptor; | |
7dd19e69 VM |
586 | break; |
587 | case HCD_USB11: | |
1da177e4 LT |
588 | bufp = fs_rh_config_descriptor; |
589 | len = sizeof fs_rh_config_descriptor; | |
7dd19e69 VM |
590 | break; |
591 | default: | |
592 | goto error; | |
1da177e4 | 593 | } |
fb669cc0 | 594 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
595 | patch_wakeup = 1; |
596 | break; | |
597 | case USB_DT_STRING << 8: | |
71d2718f RK |
598 | if ((wValue & 0xff) < 4) |
599 | urb->actual_length = rh_string(wValue & 0xff, | |
600 | hcd, ubuf, wLength); | |
601 | else /* unsupported IDs --> "protocol stall" */ | |
1da177e4 | 602 | goto error; |
1da177e4 | 603 | break; |
48e82361 SS |
604 | case USB_DT_BOS << 8: |
605 | goto nongeneric; | |
1da177e4 LT |
606 | default: |
607 | goto error; | |
608 | } | |
609 | break; | |
610 | case DeviceRequest | USB_REQ_GET_INTERFACE: | |
14557359 | 611 | tbuf[0] = 0; |
1da177e4 LT |
612 | len = 1; |
613 | /* FALLTHROUGH */ | |
614 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: | |
615 | break; | |
616 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: | |
048cb21c | 617 | /* wValue == urb->dev->devaddr */ |
1da177e4 LT |
618 | dev_dbg (hcd->self.controller, "root hub device address %d\n", |
619 | wValue); | |
620 | break; | |
621 | ||
622 | /* INTERFACE REQUESTS (no defined feature/status flags) */ | |
623 | ||
624 | /* ENDPOINT REQUESTS */ | |
625 | ||
626 | case EndpointRequest | USB_REQ_GET_STATUS: | |
048cb21c | 627 | /* ENDPOINT_HALT flag */ |
14557359 MB |
628 | tbuf[0] = 0; |
629 | tbuf[1] = 0; | |
1da177e4 LT |
630 | len = 2; |
631 | /* FALLTHROUGH */ | |
632 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: | |
633 | case EndpointOutRequest | USB_REQ_SET_FEATURE: | |
634 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); | |
635 | break; | |
636 | ||
637 | /* CLASS REQUESTS (and errors) */ | |
638 | ||
639 | default: | |
48e82361 | 640 | nongeneric: |
1da177e4 | 641 | /* non-generic request */ |
b13296c6 DB |
642 | switch (typeReq) { |
643 | case GetHubStatus: | |
644 | case GetPortStatus: | |
645 | len = 4; | |
646 | break; | |
647 | case GetHubDescriptor: | |
648 | len = sizeof (struct usb_hub_descriptor); | |
649 | break; | |
48e82361 SS |
650 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
651 | /* len is returned by hub_control */ | |
652 | break; | |
1da177e4 | 653 | } |
b13296c6 DB |
654 | status = hcd->driver->hub_control (hcd, |
655 | typeReq, wValue, wIndex, | |
656 | tbuf, wLength); | |
d2123fd9 LT |
657 | |
658 | if (typeReq == GetHubDescriptor) | |
659 | usb_hub_adjust_deviceremovable(hcd->self.root_hub, | |
660 | (struct usb_hub_descriptor *)tbuf); | |
1da177e4 LT |
661 | break; |
662 | error: | |
663 | /* "protocol stall" on error */ | |
664 | status = -EPIPE; | |
665 | } | |
666 | ||
48e82361 | 667 | if (status < 0) { |
1da177e4 LT |
668 | len = 0; |
669 | if (status != -EPIPE) { | |
670 | dev_dbg (hcd->self.controller, | |
671 | "CTRL: TypeReq=0x%x val=0x%x " | |
672 | "idx=0x%x len=%d ==> %d\n", | |
673 | typeReq, wValue, wIndex, | |
b13296c6 | 674 | wLength, status); |
1da177e4 | 675 | } |
48e82361 SS |
676 | } else if (status > 0) { |
677 | /* hub_control may return the length of data copied. */ | |
678 | len = status; | |
679 | status = 0; | |
1da177e4 LT |
680 | } |
681 | if (len) { | |
682 | if (urb->transfer_buffer_length < len) | |
683 | len = urb->transfer_buffer_length; | |
684 | urb->actual_length = len; | |
048cb21c | 685 | /* always USB_DIR_IN, toward host */ |
1da177e4 LT |
686 | memcpy (ubuf, bufp, len); |
687 | ||
688 | /* report whether RH hardware supports remote wakeup */ | |
689 | if (patch_wakeup && | |
690 | len > offsetof (struct usb_config_descriptor, | |
691 | bmAttributes)) | |
692 | ((struct usb_config_descriptor *)ubuf)->bmAttributes | |
693 | |= USB_CONFIG_ATT_WAKEUP; | |
7329e211 AS |
694 | |
695 | /* report whether RH hardware has an integrated TT */ | |
696 | if (patch_protocol && | |
697 | len > offsetof(struct usb_device_descriptor, | |
698 | bDeviceProtocol)) | |
699 | ((struct usb_device_descriptor *) ubuf)-> | |
7bf01185 | 700 | bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT; |
1da177e4 LT |
701 | } |
702 | ||
e57e780b SS |
703 | kfree(tbuf); |
704 | ||
1da177e4 | 705 | /* any errors get returned through the urb completion */ |
9439eb94 | 706 | spin_lock_irq(&hcd_root_hub_lock); |
e9df41c5 | 707 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4a00027d | 708 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 | 709 | spin_unlock_irq(&hcd_root_hub_lock); |
1da177e4 LT |
710 | return 0; |
711 | } | |
712 | ||
713 | /*-------------------------------------------------------------------------*/ | |
714 | ||
715 | /* | |
d5926ae7 AS |
716 | * Root Hub interrupt transfers are polled using a timer if the |
717 | * driver requests it; otherwise the driver is responsible for | |
718 | * calling usb_hcd_poll_rh_status() when an event occurs. | |
1da177e4 | 719 | * |
d5926ae7 AS |
720 | * Completions are called in_interrupt(), but they may or may not |
721 | * be in_irq(). | |
1da177e4 | 722 | */ |
d5926ae7 AS |
723 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
724 | { | |
725 | struct urb *urb; | |
726 | int length; | |
727 | unsigned long flags; | |
ad361c98 | 728 | char buffer[6]; /* Any root hubs with > 31 ports? */ |
1da177e4 | 729 | |
6d88e679 | 730 | if (unlikely(!hcd->rh_pollable)) |
1b42ae6d | 731 | return; |
d5926ae7 AS |
732 | if (!hcd->uses_new_polling && !hcd->status_urb) |
733 | return; | |
1da177e4 | 734 | |
d5926ae7 AS |
735 | length = hcd->driver->hub_status_data(hcd, buffer); |
736 | if (length > 0) { | |
1da177e4 | 737 | |
d5926ae7 | 738 | /* try to complete the status urb */ |
9439eb94 | 739 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
d5926ae7 AS |
740 | urb = hcd->status_urb; |
741 | if (urb) { | |
541c7d43 | 742 | clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 743 | hcd->status_urb = NULL; |
e9df41c5 AS |
744 | urb->actual_length = length; |
745 | memcpy(urb->transfer_buffer, buffer, length); | |
9439eb94 | 746 | |
e9df41c5 | 747 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4a00027d | 748 | usb_hcd_giveback_urb(hcd, urb, 0); |
e9df41c5 | 749 | } else { |
d5926ae7 | 750 | length = 0; |
541c7d43 | 751 | set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 752 | } |
9439eb94 | 753 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
1da177e4 LT |
754 | } |
755 | ||
d5926ae7 | 756 | /* The USB 2.0 spec says 256 ms. This is close enough and won't |
01cd0819 AV |
757 | * exceed that limit if HZ is 100. The math is more clunky than |
758 | * maybe expected, this is to make sure that all timers for USB devices | |
25985edc | 759 | * fire at the same time to give the CPU a break in between */ |
541c7d43 | 760 | if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : |
d5926ae7 | 761 | (length == 0 && hcd->status_urb != NULL)) |
01cd0819 | 762 | mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
1da177e4 | 763 | } |
d5926ae7 | 764 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
1da177e4 LT |
765 | |
766 | /* timer callback */ | |
d5926ae7 AS |
767 | static void rh_timer_func (unsigned long _hcd) |
768 | { | |
769 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); | |
770 | } | |
771 | ||
772 | /*-------------------------------------------------------------------------*/ | |
1da177e4 | 773 | |
d5926ae7 | 774 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
1da177e4 | 775 | { |
d5926ae7 | 776 | int retval; |
1da177e4 | 777 | unsigned long flags; |
71d2718f | 778 | unsigned len = 1 + (urb->dev->maxchild / 8); |
1da177e4 | 779 | |
d5926ae7 | 780 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
e9df41c5 | 781 | if (hcd->status_urb || urb->transfer_buffer_length < len) { |
d5926ae7 AS |
782 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); |
783 | retval = -EINVAL; | |
e9df41c5 AS |
784 | goto done; |
785 | } | |
1da177e4 | 786 | |
e9df41c5 AS |
787 | retval = usb_hcd_link_urb_to_ep(hcd, urb); |
788 | if (retval) | |
789 | goto done; | |
1da177e4 | 790 | |
e9df41c5 AS |
791 | hcd->status_urb = urb; |
792 | urb->hcpriv = hcd; /* indicate it's queued */ | |
793 | if (!hcd->uses_new_polling) | |
794 | mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); | |
795 | ||
796 | /* If a status change has already occurred, report it ASAP */ | |
541c7d43 | 797 | else if (HCD_POLL_PENDING(hcd)) |
e9df41c5 AS |
798 | mod_timer(&hcd->rh_timer, jiffies); |
799 | retval = 0; | |
800 | done: | |
d5926ae7 AS |
801 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
802 | return retval; | |
1da177e4 LT |
803 | } |
804 | ||
1da177e4 LT |
805 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
806 | { | |
5e60a161 | 807 | if (usb_endpoint_xfer_int(&urb->ep->desc)) |
d5926ae7 | 808 | return rh_queue_status (hcd, urb); |
5e60a161 | 809 | if (usb_endpoint_xfer_control(&urb->ep->desc)) |
1da177e4 | 810 | return rh_call_control (hcd, urb); |
d5926ae7 | 811 | return -EINVAL; |
1da177e4 LT |
812 | } |
813 | ||
814 | /*-------------------------------------------------------------------------*/ | |
815 | ||
455b25fb AS |
816 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
817 | * since these URBs always execute synchronously. | |
d5926ae7 | 818 | */ |
e9df41c5 | 819 | static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 820 | { |
455b25fb | 821 | unsigned long flags; |
e9df41c5 | 822 | int rc; |
1da177e4 | 823 | |
9439eb94 | 824 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
e9df41c5 AS |
825 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
826 | if (rc) | |
827 | goto done; | |
828 | ||
5e60a161 | 829 | if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ |
455b25fb | 830 | ; /* Do nothing */ |
d5926ae7 AS |
831 | |
832 | } else { /* Status URB */ | |
833 | if (!hcd->uses_new_polling) | |
455b25fb | 834 | del_timer (&hcd->rh_timer); |
d5926ae7 AS |
835 | if (urb == hcd->status_urb) { |
836 | hcd->status_urb = NULL; | |
e9df41c5 | 837 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
4a00027d | 838 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 AS |
839 | } |
840 | } | |
e9df41c5 | 841 | done: |
9439eb94 | 842 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
e9df41c5 | 843 | return rc; |
1da177e4 LT |
844 | } |
845 | ||
5234ce1b IPG |
846 | |
847 | ||
848 | /* | |
849 | * Show & store the current value of authorized_default | |
850 | */ | |
d03f254f GKH |
851 | static ssize_t authorized_default_show(struct device *dev, |
852 | struct device_attribute *attr, char *buf) | |
5234ce1b IPG |
853 | { |
854 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
855 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
856 | struct usb_hcd *usb_hcd; | |
857 | ||
858 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ | |
859 | return -ENODEV; | |
860 | usb_hcd = bus_to_hcd(usb_bus); | |
861 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); | |
862 | } | |
863 | ||
d03f254f GKH |
864 | static ssize_t authorized_default_store(struct device *dev, |
865 | struct device_attribute *attr, | |
866 | const char *buf, size_t size) | |
5234ce1b IPG |
867 | { |
868 | ssize_t result; | |
869 | unsigned val; | |
870 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
871 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
872 | struct usb_hcd *usb_hcd; | |
873 | ||
874 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ | |
875 | return -ENODEV; | |
876 | usb_hcd = bus_to_hcd(usb_bus); | |
877 | result = sscanf(buf, "%u\n", &val); | |
878 | if (result == 1) { | |
14557359 | 879 | usb_hcd->authorized_default = val ? 1 : 0; |
5234ce1b | 880 | result = size; |
d1ddb0a6 | 881 | } else { |
5234ce1b | 882 | result = -EINVAL; |
d1ddb0a6 | 883 | } |
5234ce1b IPG |
884 | return result; |
885 | } | |
d03f254f | 886 | static DEVICE_ATTR_RW(authorized_default); |
5234ce1b IPG |
887 | |
888 | /* Group all the USB bus attributes */ | |
889 | static struct attribute *usb_bus_attrs[] = { | |
890 | &dev_attr_authorized_default.attr, | |
891 | NULL, | |
892 | }; | |
893 | ||
894 | static struct attribute_group usb_bus_attr_group = { | |
895 | .name = NULL, /* we want them in the same directory */ | |
896 | .attrs = usb_bus_attrs, | |
897 | }; | |
898 | ||
899 | ||
900 | ||
1da177e4 LT |
901 | /*-------------------------------------------------------------------------*/ |
902 | ||
1da177e4 LT |
903 | /** |
904 | * usb_bus_init - shared initialization code | |
905 | * @bus: the bus structure being initialized | |
906 | * | |
907 | * This code is used to initialize a usb_bus structure, memory for which is | |
908 | * separately managed. | |
909 | */ | |
910 | static void usb_bus_init (struct usb_bus *bus) | |
911 | { | |
912 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); | |
913 | ||
914 | bus->devnum_next = 1; | |
915 | ||
916 | bus->root_hub = NULL; | |
1da177e4 LT |
917 | bus->busnum = -1; |
918 | bus->bandwidth_allocated = 0; | |
919 | bus->bandwidth_int_reqs = 0; | |
920 | bus->bandwidth_isoc_reqs = 0; | |
921 | ||
922 | INIT_LIST_HEAD (&bus->bus_list); | |
1da177e4 LT |
923 | } |
924 | ||
1da177e4 LT |
925 | /*-------------------------------------------------------------------------*/ |
926 | ||
927 | /** | |
928 | * usb_register_bus - registers the USB host controller with the usb core | |
929 | * @bus: pointer to the bus to register | |
930 | * Context: !in_interrupt() | |
931 | * | |
932 | * Assigns a bus number, and links the controller into usbcore data | |
933 | * structures so that it can be seen by scanning the bus list. | |
626f090c YB |
934 | * |
935 | * Return: 0 if successful. A negative error code otherwise. | |
1da177e4 LT |
936 | */ |
937 | static int usb_register_bus(struct usb_bus *bus) | |
938 | { | |
eb579f58 | 939 | int result = -E2BIG; |
1da177e4 | 940 | int busnum; |
1da177e4 | 941 | |
4186ecf8 | 942 | mutex_lock(&usb_bus_list_lock); |
059239ad | 943 | busnum = find_next_zero_bit(busmap, USB_MAXBUS, 1); |
eb579f58 | 944 | if (busnum >= USB_MAXBUS) { |
1da177e4 | 945 | printk (KERN_ERR "%s: too many buses\n", usbcore_name); |
eb579f58 | 946 | goto error_find_busnum; |
1da177e4 | 947 | } |
059239ad | 948 | set_bit(busnum, busmap); |
eb579f58 | 949 | bus->busnum = busnum; |
5a3201b2 | 950 | |
1da177e4 LT |
951 | /* Add it to the local list of buses */ |
952 | list_add (&bus->bus_list, &usb_bus_list); | |
4186ecf8 | 953 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 954 | |
3099e75a | 955 | usb_notify_add_bus(bus); |
1da177e4 | 956 | |
eb579f58 IPG |
957 | dev_info (bus->controller, "new USB bus registered, assigned bus " |
958 | "number %d\n", bus->busnum); | |
1da177e4 | 959 | return 0; |
eb579f58 | 960 | |
eb579f58 IPG |
961 | error_find_busnum: |
962 | mutex_unlock(&usb_bus_list_lock); | |
963 | return result; | |
1da177e4 LT |
964 | } |
965 | ||
966 | /** | |
967 | * usb_deregister_bus - deregisters the USB host controller | |
968 | * @bus: pointer to the bus to deregister | |
969 | * Context: !in_interrupt() | |
970 | * | |
971 | * Recycles the bus number, and unlinks the controller from usbcore data | |
972 | * structures so that it won't be seen by scanning the bus list. | |
973 | */ | |
974 | static void usb_deregister_bus (struct usb_bus *bus) | |
975 | { | |
976 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); | |
977 | ||
978 | /* | |
979 | * NOTE: make sure that all the devices are removed by the | |
980 | * controller code, as well as having it call this when cleaning | |
981 | * itself up | |
982 | */ | |
4186ecf8 | 983 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 984 | list_del (&bus->bus_list); |
4186ecf8 | 985 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 986 | |
3099e75a | 987 | usb_notify_remove_bus(bus); |
1da177e4 | 988 | |
059239ad | 989 | clear_bit(bus->busnum, busmap); |
1da177e4 LT |
990 | } |
991 | ||
992 | /** | |
8ec8d20b | 993 | * register_root_hub - called by usb_add_hcd() to register a root hub |
1da177e4 LT |
994 | * @hcd: host controller for this root hub |
995 | * | |
8ec8d20b | 996 | * This function registers the root hub with the USB subsystem. It sets up |
b1e8f0a6 DB |
997 | * the device properly in the device tree and then calls usb_new_device() |
998 | * to register the usb device. It also assigns the root hub's USB address | |
999 | * (always 1). | |
626f090c YB |
1000 | * |
1001 | * Return: 0 if successful. A negative error code otherwise. | |
1da177e4 | 1002 | */ |
b1e8f0a6 | 1003 | static int register_root_hub(struct usb_hcd *hcd) |
1da177e4 LT |
1004 | { |
1005 | struct device *parent_dev = hcd->self.controller; | |
b1e8f0a6 | 1006 | struct usb_device *usb_dev = hcd->self.root_hub; |
1da177e4 LT |
1007 | const int devnum = 1; |
1008 | int retval; | |
1009 | ||
1da177e4 LT |
1010 | usb_dev->devnum = devnum; |
1011 | usb_dev->bus->devnum_next = devnum + 1; | |
1012 | memset (&usb_dev->bus->devmap.devicemap, 0, | |
1013 | sizeof usb_dev->bus->devmap.devicemap); | |
1014 | set_bit (devnum, usb_dev->bus->devmap.devicemap); | |
1015 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); | |
1016 | ||
4186ecf8 | 1017 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 1018 | |
551509d2 | 1019 | usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); |
1da177e4 LT |
1020 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); |
1021 | if (retval != sizeof usb_dev->descriptor) { | |
4186ecf8 | 1022 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 1023 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
7071a3ce | 1024 | dev_name(&usb_dev->dev), retval); |
1da177e4 LT |
1025 | return (retval < 0) ? retval : -EMSGSIZE; |
1026 | } | |
448b6eb1 SS |
1027 | if (usb_dev->speed == USB_SPEED_SUPER) { |
1028 | retval = usb_get_bos_descriptor(usb_dev); | |
1029 | if (retval < 0) { | |
1030 | mutex_unlock(&usb_bus_list_lock); | |
1031 | dev_dbg(parent_dev, "can't read %s bos descriptor %d\n", | |
1032 | dev_name(&usb_dev->dev), retval); | |
1033 | return retval; | |
1034 | } | |
1035 | } | |
1da177e4 | 1036 | |
1da177e4 | 1037 | retval = usb_new_device (usb_dev); |
1da177e4 | 1038 | if (retval) { |
1da177e4 | 1039 | dev_err (parent_dev, "can't register root hub for %s, %d\n", |
7071a3ce | 1040 | dev_name(&usb_dev->dev), retval); |
0a231403 | 1041 | } else { |
1da177e4 LT |
1042 | spin_lock_irq (&hcd_root_hub_lock); |
1043 | hcd->rh_registered = 1; | |
1044 | spin_unlock_irq (&hcd_root_hub_lock); | |
1045 | ||
1046 | /* Did the HC die before the root hub was registered? */ | |
69fff59d | 1047 | if (HCD_DEAD(hcd)) |
1da177e4 LT |
1048 | usb_hc_died (hcd); /* This time clean up */ |
1049 | } | |
0a231403 | 1050 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
1051 | |
1052 | return retval; | |
1053 | } | |
1da177e4 | 1054 | |
da0aa716 AS |
1055 | /* |
1056 | * usb_hcd_start_port_resume - a root-hub port is sending a resume signal | |
1057 | * @bus: the bus which the root hub belongs to | |
1058 | * @portnum: the port which is being resumed | |
1059 | * | |
1060 | * HCDs should call this function when they know that a resume signal is | |
1061 | * being sent to a root-hub port. The root hub will be prevented from | |
1062 | * going into autosuspend until usb_hcd_end_port_resume() is called. | |
1063 | * | |
1064 | * The bus's private lock must be held by the caller. | |
1065 | */ | |
1066 | void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum) | |
1067 | { | |
1068 | unsigned bit = 1 << portnum; | |
1069 | ||
1070 | if (!(bus->resuming_ports & bit)) { | |
1071 | bus->resuming_ports |= bit; | |
1072 | pm_runtime_get_noresume(&bus->root_hub->dev); | |
1073 | } | |
1074 | } | |
1075 | EXPORT_SYMBOL_GPL(usb_hcd_start_port_resume); | |
1076 | ||
1077 | /* | |
1078 | * usb_hcd_end_port_resume - a root-hub port has stopped sending a resume signal | |
1079 | * @bus: the bus which the root hub belongs to | |
1080 | * @portnum: the port which is being resumed | |
1081 | * | |
1082 | * HCDs should call this function when they know that a resume signal has | |
1083 | * stopped being sent to a root-hub port. The root hub will be allowed to | |
1084 | * autosuspend again. | |
1085 | * | |
1086 | * The bus's private lock must be held by the caller. | |
1087 | */ | |
1088 | void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum) | |
1089 | { | |
1090 | unsigned bit = 1 << portnum; | |
1091 | ||
1092 | if (bus->resuming_ports & bit) { | |
1093 | bus->resuming_ports &= ~bit; | |
1094 | pm_runtime_put_noidle(&bus->root_hub->dev); | |
1095 | } | |
1096 | } | |
1097 | EXPORT_SYMBOL_GPL(usb_hcd_end_port_resume); | |
1da177e4 LT |
1098 | |
1099 | /*-------------------------------------------------------------------------*/ | |
1100 | ||
1101 | /** | |
1102 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds | |
1103 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} | |
1104 | * @is_input: true iff the transaction sends data to the host | |
1105 | * @isoc: true for isochronous transactions, false for interrupt ones | |
1106 | * @bytecount: how many bytes in the transaction. | |
1107 | * | |
626f090c YB |
1108 | * Return: Approximate bus time in nanoseconds for a periodic transaction. |
1109 | * | |
1110 | * Note: | |
1da177e4 LT |
1111 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be |
1112 | * scheduled in software, this function is only used for such scheduling. | |
1113 | */ | |
1114 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) | |
1115 | { | |
1116 | unsigned long tmp; | |
1117 | ||
1118 | switch (speed) { | |
1119 | case USB_SPEED_LOW: /* INTR only */ | |
1120 | if (is_input) { | |
1121 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1122 | return 64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1123 | } else { |
1124 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1125 | return 64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1126 | } |
1127 | case USB_SPEED_FULL: /* ISOC or INTR */ | |
1128 | if (isoc) { | |
1129 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1130 | return ((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1131 | } else { |
1132 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
07010496 | 1133 | return 9107L + BW_HOST_DELAY + tmp; |
1da177e4 LT |
1134 | } |
1135 | case USB_SPEED_HIGH: /* ISOC or INTR */ | |
048cb21c | 1136 | /* FIXME adjust for input vs output */ |
1da177e4 | 1137 | if (isoc) |
498f78e6 | 1138 | tmp = HS_NSECS_ISO (bytecount); |
1da177e4 | 1139 | else |
498f78e6 | 1140 | tmp = HS_NSECS (bytecount); |
1da177e4 LT |
1141 | return tmp; |
1142 | default: | |
1143 | pr_debug ("%s: bogus device speed!\n", usbcore_name); | |
1144 | return -1; | |
1145 | } | |
1146 | } | |
782e70c6 | 1147 | EXPORT_SYMBOL_GPL(usb_calc_bus_time); |
1da177e4 | 1148 | |
1da177e4 LT |
1149 | |
1150 | /*-------------------------------------------------------------------------*/ | |
1151 | ||
1152 | /* | |
1153 | * Generic HC operations. | |
1154 | */ | |
1155 | ||
1156 | /*-------------------------------------------------------------------------*/ | |
1157 | ||
e9df41c5 AS |
1158 | /** |
1159 | * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue | |
1160 | * @hcd: host controller to which @urb was submitted | |
1161 | * @urb: URB being submitted | |
1162 | * | |
1163 | * Host controller drivers should call this routine in their enqueue() | |
1164 | * method. The HCD's private spinlock must be held and interrupts must | |
1165 | * be disabled. The actions carried out here are required for URB | |
1166 | * submission, as well as for endpoint shutdown and for usb_kill_urb. | |
1167 | * | |
626f090c | 1168 | * Return: 0 for no error, otherwise a negative error code (in which case |
e9df41c5 AS |
1169 | * the enqueue() method must fail). If no error occurs but enqueue() fails |
1170 | * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing | |
1171 | * the private spinlock and returning. | |
1172 | */ | |
1173 | int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) | |
1da177e4 | 1174 | { |
9a9bf406 | 1175 | int rc = 0; |
1da177e4 | 1176 | |
e9df41c5 | 1177 | spin_lock(&hcd_urb_list_lock); |
1da177e4 | 1178 | |
9a9bf406 | 1179 | /* Check that the URB isn't being killed */ |
49367d8f | 1180 | if (unlikely(atomic_read(&urb->reject))) { |
9a9bf406 AS |
1181 | rc = -EPERM; |
1182 | goto done; | |
9f6a93f7 | 1183 | } |
1da177e4 | 1184 | |
9a9bf406 AS |
1185 | if (unlikely(!urb->ep->enabled)) { |
1186 | rc = -ENOENT; | |
1187 | goto done; | |
1188 | } | |
1da177e4 | 1189 | |
6840d255 AS |
1190 | if (unlikely(!urb->dev->can_submit)) { |
1191 | rc = -EHOSTUNREACH; | |
1192 | goto done; | |
1193 | } | |
1194 | ||
1da177e4 | 1195 | /* |
9a9bf406 AS |
1196 | * Check the host controller's state and add the URB to the |
1197 | * endpoint's queue. | |
1da177e4 | 1198 | */ |
9b37596a | 1199 | if (HCD_RH_RUNNING(hcd)) { |
eb231054 | 1200 | urb->unlinked = 0; |
9a9bf406 | 1201 | list_add_tail(&urb->urb_list, &urb->ep->urb_list); |
9b37596a | 1202 | } else { |
9a9bf406 AS |
1203 | rc = -ESHUTDOWN; |
1204 | goto done; | |
1da177e4 | 1205 | } |
9a9bf406 | 1206 | done: |
e9df41c5 | 1207 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 AS |
1208 | return rc; |
1209 | } | |
e9df41c5 | 1210 | EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); |
9a9bf406 | 1211 | |
e9df41c5 AS |
1212 | /** |
1213 | * usb_hcd_check_unlink_urb - check whether an URB may be unlinked | |
1214 | * @hcd: host controller to which @urb was submitted | |
1215 | * @urb: URB being checked for unlinkability | |
1216 | * @status: error code to store in @urb if the unlink succeeds | |
1217 | * | |
1218 | * Host controller drivers should call this routine in their dequeue() | |
1219 | * method. The HCD's private spinlock must be held and interrupts must | |
1220 | * be disabled. The actions carried out here are required for making | |
1221 | * sure than an unlink is valid. | |
1222 | * | |
626f090c | 1223 | * Return: 0 for no error, otherwise a negative error code (in which case |
e9df41c5 AS |
1224 | * the dequeue() method must fail). The possible error codes are: |
1225 | * | |
1226 | * -EIDRM: @urb was not submitted or has already completed. | |
1227 | * The completion function may not have been called yet. | |
1228 | * | |
1229 | * -EBUSY: @urb has already been unlinked. | |
1230 | */ | |
1231 | int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
9a9bf406 AS |
1232 | int status) |
1233 | { | |
9a9bf406 | 1234 | struct list_head *tmp; |
9a9bf406 AS |
1235 | |
1236 | /* insist the urb is still queued */ | |
1237 | list_for_each(tmp, &urb->ep->urb_list) { | |
1238 | if (tmp == &urb->urb_list) | |
1239 | break; | |
1240 | } | |
e9df41c5 AS |
1241 | if (tmp != &urb->urb_list) |
1242 | return -EIDRM; | |
1da177e4 | 1243 | |
9a9bf406 AS |
1244 | /* Any status except -EINPROGRESS means something already started to |
1245 | * unlink this URB from the hardware. So there's no more work to do. | |
1da177e4 | 1246 | */ |
eb231054 | 1247 | if (urb->unlinked) |
e9df41c5 | 1248 | return -EBUSY; |
eb231054 | 1249 | urb->unlinked = status; |
e9df41c5 | 1250 | return 0; |
9a9bf406 | 1251 | } |
e9df41c5 | 1252 | EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); |
9a9bf406 | 1253 | |
e9df41c5 AS |
1254 | /** |
1255 | * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue | |
1256 | * @hcd: host controller to which @urb was submitted | |
1257 | * @urb: URB being unlinked | |
1258 | * | |
1259 | * Host controller drivers should call this routine before calling | |
1260 | * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and | |
1261 | * interrupts must be disabled. The actions carried out here are required | |
1262 | * for URB completion. | |
1263 | */ | |
1264 | void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) | |
9a9bf406 | 1265 | { |
9a9bf406 | 1266 | /* clear all state linking urb to this dev (and hcd) */ |
e9df41c5 | 1267 | spin_lock(&hcd_urb_list_lock); |
9a9bf406 | 1268 | list_del_init(&urb->urb_list); |
e9df41c5 | 1269 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 | 1270 | } |
e9df41c5 | 1271 | EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); |
9a9bf406 | 1272 | |
b3476675 MD |
1273 | /* |
1274 | * Some usb host controllers can only perform dma using a small SRAM area. | |
1275 | * The usb core itself is however optimized for host controllers that can dma | |
1276 | * using regular system memory - like pci devices doing bus mastering. | |
1277 | * | |
1278 | * To support host controllers with limited dma capabilites we provide dma | |
1279 | * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. | |
1280 | * For this to work properly the host controller code must first use the | |
1281 | * function dma_declare_coherent_memory() to point out which memory area | |
1282 | * that should be used for dma allocations. | |
1283 | * | |
1284 | * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for | |
1285 | * dma using dma_alloc_coherent() which in turn allocates from the memory | |
1286 | * area pointed out with dma_declare_coherent_memory(). | |
1287 | * | |
1288 | * So, to summarize... | |
1289 | * | |
1290 | * - We need "local" memory, canonical example being | |
1291 | * a small SRAM on a discrete controller being the | |
1292 | * only memory that the controller can read ... | |
1293 | * (a) "normal" kernel memory is no good, and | |
1294 | * (b) there's not enough to share | |
1295 | * | |
1296 | * - The only *portable* hook for such stuff in the | |
1297 | * DMA framework is dma_declare_coherent_memory() | |
1298 | * | |
1299 | * - So we use that, even though the primary requirement | |
025d4430 | 1300 | * is that the memory be "local" (hence addressable |
b3476675 MD |
1301 | * by that device), not "coherent". |
1302 | * | |
1303 | */ | |
1304 | ||
1305 | static int hcd_alloc_coherent(struct usb_bus *bus, | |
1306 | gfp_t mem_flags, dma_addr_t *dma_handle, | |
1307 | void **vaddr_handle, size_t size, | |
1308 | enum dma_data_direction dir) | |
1309 | { | |
1310 | unsigned char *vaddr; | |
1311 | ||
4307a28e AR |
1312 | if (*vaddr_handle == NULL) { |
1313 | WARN_ON_ONCE(1); | |
1314 | return -EFAULT; | |
1315 | } | |
1316 | ||
b3476675 MD |
1317 | vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), |
1318 | mem_flags, dma_handle); | |
1319 | if (!vaddr) | |
1320 | return -ENOMEM; | |
1321 | ||
1322 | /* | |
1323 | * Store the virtual address of the buffer at the end | |
1324 | * of the allocated dma buffer. The size of the buffer | |
1325 | * may be uneven so use unaligned functions instead | |
1326 | * of just rounding up. It makes sense to optimize for | |
1327 | * memory footprint over access speed since the amount | |
1328 | * of memory available for dma may be limited. | |
1329 | */ | |
1330 | put_unaligned((unsigned long)*vaddr_handle, | |
1331 | (unsigned long *)(vaddr + size)); | |
1332 | ||
1333 | if (dir == DMA_TO_DEVICE) | |
1334 | memcpy(vaddr, *vaddr_handle, size); | |
1335 | ||
1336 | *vaddr_handle = vaddr; | |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, | |
1341 | void **vaddr_handle, size_t size, | |
1342 | enum dma_data_direction dir) | |
1343 | { | |
1344 | unsigned char *vaddr = *vaddr_handle; | |
1345 | ||
1346 | vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); | |
1347 | ||
1348 | if (dir == DMA_FROM_DEVICE) | |
1349 | memcpy(vaddr, *vaddr_handle, size); | |
1350 | ||
1351 | hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); | |
1352 | ||
1353 | *vaddr_handle = vaddr; | |
1354 | *dma_handle = 0; | |
1355 | } | |
1356 | ||
c8cf203a | 1357 | void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) |
ff9c895f | 1358 | { |
ff9c895f AS |
1359 | if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) |
1360 | dma_unmap_single(hcd->self.controller, | |
1361 | urb->setup_dma, | |
1362 | sizeof(struct usb_ctrlrequest), | |
1363 | DMA_TO_DEVICE); | |
1364 | else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) | |
1365 | hcd_free_coherent(urb->dev->bus, | |
1366 | &urb->setup_dma, | |
1367 | (void **) &urb->setup_packet, | |
1368 | sizeof(struct usb_ctrlrequest), | |
1369 | DMA_TO_DEVICE); | |
1370 | ||
1dae423d MF |
1371 | /* Make it safe to call this routine more than once */ |
1372 | urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); | |
1373 | } | |
c8cf203a | 1374 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); |
1dae423d | 1375 | |
2694a48d RM |
1376 | static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1377 | { | |
1378 | if (hcd->driver->unmap_urb_for_dma) | |
1379 | hcd->driver->unmap_urb_for_dma(hcd, urb); | |
1380 | else | |
1381 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
1382 | } | |
1383 | ||
c8cf203a | 1384 | void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1dae423d MF |
1385 | { |
1386 | enum dma_data_direction dir; | |
1387 | ||
c8cf203a | 1388 | usb_hcd_unmap_urb_setup_for_dma(hcd, urb); |
1dae423d | 1389 | |
ff9c895f AS |
1390 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
1391 | if (urb->transfer_flags & URB_DMA_MAP_SG) | |
1392 | dma_unmap_sg(hcd->self.controller, | |
910f8d0c | 1393 | urb->sg, |
ff9c895f AS |
1394 | urb->num_sgs, |
1395 | dir); | |
1396 | else if (urb->transfer_flags & URB_DMA_MAP_PAGE) | |
1397 | dma_unmap_page(hcd->self.controller, | |
1398 | urb->transfer_dma, | |
1399 | urb->transfer_buffer_length, | |
1400 | dir); | |
1401 | else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) | |
1402 | dma_unmap_single(hcd->self.controller, | |
1403 | urb->transfer_dma, | |
1404 | urb->transfer_buffer_length, | |
1405 | dir); | |
1406 | else if (urb->transfer_flags & URB_MAP_LOCAL) | |
1407 | hcd_free_coherent(urb->dev->bus, | |
1408 | &urb->transfer_dma, | |
1409 | &urb->transfer_buffer, | |
1410 | urb->transfer_buffer_length, | |
1411 | dir); | |
1412 | ||
1413 | /* Make it safe to call this routine more than once */ | |
1dae423d | 1414 | urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | |
ff9c895f AS |
1415 | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); |
1416 | } | |
c8cf203a | 1417 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); |
ff9c895f | 1418 | |
b3476675 MD |
1419 | static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
1420 | gfp_t mem_flags) | |
2694a48d RM |
1421 | { |
1422 | if (hcd->driver->map_urb_for_dma) | |
1423 | return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); | |
1424 | else | |
1425 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); | |
1426 | } | |
1427 | ||
1428 | int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, | |
1429 | gfp_t mem_flags) | |
9a9bf406 | 1430 | { |
b3476675 MD |
1431 | enum dma_data_direction dir; |
1432 | int ret = 0; | |
1433 | ||
9a9bf406 AS |
1434 | /* Map the URB's buffers for DMA access. |
1435 | * Lower level HCD code should use *_dma exclusively, | |
e04748e3 SS |
1436 | * unless it uses pio or talks to another transport, |
1437 | * or uses the provided scatter gather list for bulk. | |
1da177e4 | 1438 | */ |
b3476675 | 1439 | |
85bcb5ee | 1440 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
07a8cdd2 AG |
1441 | if (hcd->self.uses_pio_for_control) |
1442 | return ret; | |
85e034fd | 1443 | if (hcd->self.uses_dma) { |
b3476675 | 1444 | urb->setup_dma = dma_map_single( |
1da177e4 LT |
1445 | hcd->self.controller, |
1446 | urb->setup_packet, | |
b3476675 | 1447 | sizeof(struct usb_ctrlrequest), |
1da177e4 | 1448 | DMA_TO_DEVICE); |
85e034fd LF |
1449 | if (dma_mapping_error(hcd->self.controller, |
1450 | urb->setup_dma)) | |
1451 | return -EAGAIN; | |
ff9c895f | 1452 | urb->transfer_flags |= URB_SETUP_MAP_SINGLE; |
f537da68 | 1453 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1454 | ret = hcd_alloc_coherent( |
1455 | urb->dev->bus, mem_flags, | |
1456 | &urb->setup_dma, | |
1457 | (void **)&urb->setup_packet, | |
1458 | sizeof(struct usb_ctrlrequest), | |
1459 | DMA_TO_DEVICE); | |
ff9c895f AS |
1460 | if (ret) |
1461 | return ret; | |
1462 | urb->transfer_flags |= URB_SETUP_MAP_LOCAL; | |
f537da68 | 1463 | } |
b3476675 MD |
1464 | } |
1465 | ||
1466 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
ff9c895f | 1467 | if (urb->transfer_buffer_length != 0 |
b3476675 | 1468 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { |
85e034fd | 1469 | if (hcd->self.uses_dma) { |
ff9c895f | 1470 | if (urb->num_sgs) { |
fe2072cc HG |
1471 | int n; |
1472 | ||
1473 | /* We don't support sg for isoc transfers ! */ | |
1474 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { | |
1475 | WARN_ON(1); | |
1476 | return -EINVAL; | |
1477 | } | |
1478 | ||
1479 | n = dma_map_sg( | |
ff9c895f | 1480 | hcd->self.controller, |
910f8d0c | 1481 | urb->sg, |
ff9c895f AS |
1482 | urb->num_sgs, |
1483 | dir); | |
1484 | if (n <= 0) | |
1485 | ret = -EAGAIN; | |
1486 | else | |
1487 | urb->transfer_flags |= URB_DMA_MAP_SG; | |
bc677d5b CL |
1488 | urb->num_mapped_sgs = n; |
1489 | if (n != urb->num_sgs) | |
ff9c895f AS |
1490 | urb->transfer_flags |= |
1491 | URB_DMA_SG_COMBINED; | |
ff9c895f | 1492 | } else if (urb->sg) { |
910f8d0c | 1493 | struct scatterlist *sg = urb->sg; |
ff9c895f AS |
1494 | urb->transfer_dma = dma_map_page( |
1495 | hcd->self.controller, | |
1496 | sg_page(sg), | |
1497 | sg->offset, | |
1498 | urb->transfer_buffer_length, | |
1499 | dir); | |
1500 | if (dma_mapping_error(hcd->self.controller, | |
85e034fd | 1501 | urb->transfer_dma)) |
ff9c895f AS |
1502 | ret = -EAGAIN; |
1503 | else | |
1504 | urb->transfer_flags |= URB_DMA_MAP_PAGE; | |
1505 | } else { | |
1506 | urb->transfer_dma = dma_map_single( | |
1507 | hcd->self.controller, | |
1508 | urb->transfer_buffer, | |
1509 | urb->transfer_buffer_length, | |
1510 | dir); | |
1511 | if (dma_mapping_error(hcd->self.controller, | |
1512 | urb->transfer_dma)) | |
1513 | ret = -EAGAIN; | |
1514 | else | |
1515 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; | |
1516 | } | |
85e034fd | 1517 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1518 | ret = hcd_alloc_coherent( |
1519 | urb->dev->bus, mem_flags, | |
1520 | &urb->transfer_dma, | |
1521 | &urb->transfer_buffer, | |
1522 | urb->transfer_buffer_length, | |
1523 | dir); | |
ff9c895f AS |
1524 | if (ret == 0) |
1525 | urb->transfer_flags |= URB_MAP_LOCAL; | |
b3476675 | 1526 | } |
ff9c895f AS |
1527 | if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | |
1528 | URB_SETUP_MAP_LOCAL))) | |
c8cf203a | 1529 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
1da177e4 | 1530 | } |
b3476675 | 1531 | return ret; |
9a9bf406 | 1532 | } |
2694a48d | 1533 | EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); |
1da177e4 | 1534 | |
9a9bf406 AS |
1535 | /*-------------------------------------------------------------------------*/ |
1536 | ||
1537 | /* may be called in any context with a valid urb->dev usecount | |
1538 | * caller surrenders "ownership" of urb | |
1539 | * expects usb_submit_urb() to have sanity checked and conditioned all | |
1540 | * inputs in the urb | |
1541 | */ | |
1542 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) | |
1543 | { | |
1544 | int status; | |
1545 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); | |
1546 | ||
1547 | /* increment urb's reference count as part of giving it to the HCD | |
1548 | * (which will control it). HCD guarantees that it either returns | |
1549 | * an error or calls giveback(), but not both. | |
1550 | */ | |
1551 | usb_get_urb(urb); | |
1552 | atomic_inc(&urb->use_count); | |
4d59d8a1 | 1553 | atomic_inc(&urb->dev->urbnum); |
9a9bf406 AS |
1554 | usbmon_urb_submit(&hcd->self, urb); |
1555 | ||
1556 | /* NOTE requirements on root-hub callers (usbfs and the hub | |
1557 | * driver, for now): URBs' urb->transfer_buffer must be | |
1558 | * valid and usb_buffer_{sync,unmap}() not be needed, since | |
1559 | * they could clobber root hub response data. Also, control | |
1560 | * URBs must be submitted in process context with interrupts | |
1561 | * enabled. | |
1562 | */ | |
b3476675 | 1563 | |
ff9c895f | 1564 | if (is_root_hub(urb->dev)) { |
e9df41c5 | 1565 | status = rh_urb_enqueue(hcd, urb); |
ff9c895f AS |
1566 | } else { |
1567 | status = map_urb_for_dma(hcd, urb, mem_flags); | |
1568 | if (likely(status == 0)) { | |
1569 | status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); | |
1570 | if (unlikely(status)) | |
2694a48d | 1571 | unmap_urb_for_dma(hcd, urb); |
ff9c895f AS |
1572 | } |
1573 | } | |
9a9bf406 AS |
1574 | |
1575 | if (unlikely(status)) { | |
1da177e4 | 1576 | usbmon_urb_submit_error(&hcd->self, urb, status); |
b0d9efba | 1577 | urb->hcpriv = NULL; |
9a9bf406 AS |
1578 | INIT_LIST_HEAD(&urb->urb_list); |
1579 | atomic_dec(&urb->use_count); | |
4d59d8a1 | 1580 | atomic_dec(&urb->dev->urbnum); |
49367d8f | 1581 | if (atomic_read(&urb->reject)) |
9a9bf406 AS |
1582 | wake_up(&usb_kill_urb_queue); |
1583 | usb_put_urb(urb); | |
1da177e4 LT |
1584 | } |
1585 | return status; | |
1586 | } | |
1587 | ||
1588 | /*-------------------------------------------------------------------------*/ | |
1589 | ||
1da177e4 LT |
1590 | /* this makes the hcd giveback() the urb more quickly, by kicking it |
1591 | * off hardware queues (which may take a while) and returning it as | |
1592 | * soon as practical. we've already set up the urb's return status, | |
1593 | * but we can't know if the callback completed already. | |
1594 | */ | |
e9df41c5 | 1595 | static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
1596 | { |
1597 | int value; | |
1598 | ||
809a58b8 | 1599 | if (is_root_hub(urb->dev)) |
e9df41c5 | 1600 | value = usb_rh_urb_dequeue(hcd, urb, status); |
1da177e4 LT |
1601 | else { |
1602 | ||
1603 | /* The only reason an HCD might fail this call is if | |
1604 | * it has not yet fully queued the urb to begin with. | |
1605 | * Such failures should be harmless. */ | |
e9df41c5 | 1606 | value = hcd->driver->urb_dequeue(hcd, urb, status); |
1da177e4 | 1607 | } |
1da177e4 LT |
1608 | return value; |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * called in any context | |
1613 | * | |
1614 | * caller guarantees urb won't be recycled till both unlink() | |
1615 | * and the urb's completion function return | |
1616 | */ | |
a6d2bb9f | 1617 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
1da177e4 | 1618 | { |
9a9bf406 | 1619 | struct usb_hcd *hcd; |
cde217a5 AS |
1620 | int retval = -EIDRM; |
1621 | unsigned long flags; | |
1da177e4 | 1622 | |
cde217a5 AS |
1623 | /* Prevent the device and bus from going away while |
1624 | * the unlink is carried out. If they are already gone | |
1625 | * then urb->use_count must be 0, since disconnected | |
1626 | * devices can't have any active URBs. | |
1627 | */ | |
1628 | spin_lock_irqsave(&hcd_urb_unlink_lock, flags); | |
1629 | if (atomic_read(&urb->use_count) > 0) { | |
1630 | retval = 0; | |
1631 | usb_get_dev(urb->dev); | |
1632 | } | |
1633 | spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); | |
1634 | if (retval == 0) { | |
1635 | hcd = bus_to_hcd(urb->dev->bus); | |
1636 | retval = unlink1(hcd, urb, status); | |
1637 | usb_put_dev(urb->dev); | |
1638 | } | |
1da177e4 | 1639 | |
1da177e4 LT |
1640 | if (retval == 0) |
1641 | retval = -EINPROGRESS; | |
e9df41c5 | 1642 | else if (retval != -EIDRM && retval != -EBUSY) |
9a9bf406 AS |
1643 | dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", |
1644 | urb, retval); | |
1da177e4 LT |
1645 | return retval; |
1646 | } | |
1647 | ||
1648 | /*-------------------------------------------------------------------------*/ | |
1649 | ||
94dfd7ed ML |
1650 | static void __usb_hcd_giveback_urb(struct urb *urb) |
1651 | { | |
1652 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); | |
6ec4147e | 1653 | struct usb_anchor *anchor = urb->anchor; |
94dfd7ed ML |
1654 | int status = urb->unlinked; |
1655 | unsigned long flags; | |
1656 | ||
1657 | urb->hcpriv = NULL; | |
1658 | if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && | |
1659 | urb->actual_length < urb->transfer_buffer_length && | |
1660 | !status)) | |
1661 | status = -EREMOTEIO; | |
1662 | ||
1663 | unmap_urb_for_dma(hcd, urb); | |
1664 | usbmon_urb_complete(&hcd->self, urb, status); | |
6ec4147e | 1665 | usb_anchor_suspend_wakeups(anchor); |
94dfd7ed ML |
1666 | usb_unanchor_urb(urb); |
1667 | ||
1668 | /* pass ownership to the completion handler */ | |
1669 | urb->status = status; | |
1670 | ||
1671 | /* | |
1672 | * We disable local IRQs here avoid possible deadlock because | |
1673 | * drivers may call spin_lock() to hold lock which might be | |
1674 | * acquired in one hard interrupt handler. | |
1675 | * | |
1676 | * The local_irq_save()/local_irq_restore() around complete() | |
1677 | * will be removed if current USB drivers have been cleaned up | |
1678 | * and no one may trigger the above deadlock situation when | |
1679 | * running complete() in tasklet. | |
1680 | */ | |
1681 | local_irq_save(flags); | |
1682 | urb->complete(urb); | |
1683 | local_irq_restore(flags); | |
1684 | ||
6ec4147e | 1685 | usb_anchor_resume_wakeups(anchor); |
94dfd7ed ML |
1686 | atomic_dec(&urb->use_count); |
1687 | if (unlikely(atomic_read(&urb->reject))) | |
1688 | wake_up(&usb_kill_urb_queue); | |
1689 | usb_put_urb(urb); | |
1690 | } | |
1691 | ||
1692 | static void usb_giveback_urb_bh(unsigned long param) | |
1693 | { | |
1694 | struct giveback_urb_bh *bh = (struct giveback_urb_bh *)param; | |
1695 | struct list_head local_list; | |
1696 | ||
1697 | spin_lock_irq(&bh->lock); | |
1698 | bh->running = true; | |
1699 | restart: | |
1700 | list_replace_init(&bh->head, &local_list); | |
1701 | spin_unlock_irq(&bh->lock); | |
1702 | ||
1703 | while (!list_empty(&local_list)) { | |
1704 | struct urb *urb; | |
1705 | ||
1706 | urb = list_entry(local_list.next, struct urb, urb_list); | |
1707 | list_del_init(&urb->urb_list); | |
c7ccde6e | 1708 | bh->completing_ep = urb->ep; |
94dfd7ed | 1709 | __usb_hcd_giveback_urb(urb); |
c7ccde6e | 1710 | bh->completing_ep = NULL; |
94dfd7ed ML |
1711 | } |
1712 | ||
1713 | /* check if there are new URBs to giveback */ | |
1714 | spin_lock_irq(&bh->lock); | |
1715 | if (!list_empty(&bh->head)) | |
1716 | goto restart; | |
1717 | bh->running = false; | |
1718 | spin_unlock_irq(&bh->lock); | |
1719 | } | |
1720 | ||
32aca560 AS |
1721 | /** |
1722 | * usb_hcd_giveback_urb - return URB from HCD to device driver | |
1723 | * @hcd: host controller returning the URB | |
1724 | * @urb: urb being returned to the USB device driver. | |
4a00027d | 1725 | * @status: completion status code for the URB. |
32aca560 AS |
1726 | * Context: in_interrupt() |
1727 | * | |
1728 | * This hands the URB from HCD to its USB device driver, using its | |
1729 | * completion function. The HCD has freed all per-urb resources | |
1730 | * (and is done using urb->hcpriv). It also released all HCD locks; | |
1731 | * the device driver won't cause problems if it frees, modifies, | |
1732 | * or resubmits this URB. | |
eb231054 | 1733 | * |
4a00027d | 1734 | * If @urb was unlinked, the value of @status will be overridden by |
eb231054 AS |
1735 | * @urb->unlinked. Erroneous short transfers are detected in case |
1736 | * the HCD hasn't checked for them. | |
32aca560 | 1737 | */ |
4a00027d | 1738 | void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) |
32aca560 | 1739 | { |
94dfd7ed ML |
1740 | struct giveback_urb_bh *bh; |
1741 | bool running, high_prio_bh; | |
32aca560 | 1742 | |
94dfd7ed ML |
1743 | /* pass status to tasklet via unlinked */ |
1744 | if (likely(!urb->unlinked)) | |
1745 | urb->unlinked = status; | |
1f5a3d0f | 1746 | |
94dfd7ed ML |
1747 | if (!hcd_giveback_urb_in_bh(hcd) && !is_root_hub(urb->dev)) { |
1748 | __usb_hcd_giveback_urb(urb); | |
1749 | return; | |
1750 | } | |
1751 | ||
1752 | if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) { | |
1753 | bh = &hcd->high_prio_bh; | |
1754 | high_prio_bh = true; | |
1755 | } else { | |
1756 | bh = &hcd->low_prio_bh; | |
1757 | high_prio_bh = false; | |
1758 | } | |
1759 | ||
1760 | spin_lock(&bh->lock); | |
1761 | list_add_tail(&urb->urb_list, &bh->head); | |
1762 | running = bh->running; | |
1763 | spin_unlock(&bh->lock); | |
1764 | ||
1765 | if (running) | |
1766 | ; | |
1767 | else if (high_prio_bh) | |
1768 | tasklet_hi_schedule(&bh->bh); | |
1769 | else | |
1770 | tasklet_schedule(&bh->bh); | |
32aca560 | 1771 | } |
782e70c6 | 1772 | EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); |
32aca560 AS |
1773 | |
1774 | /*-------------------------------------------------------------------------*/ | |
1775 | ||
95cf82f9 AS |
1776 | /* Cancel all URBs pending on this endpoint and wait for the endpoint's |
1777 | * queue to drain completely. The caller must first insure that no more | |
1778 | * URBs can be submitted for this endpoint. | |
1da177e4 | 1779 | */ |
95cf82f9 | 1780 | void usb_hcd_flush_endpoint(struct usb_device *udev, |
a6d2bb9f | 1781 | struct usb_host_endpoint *ep) |
1da177e4 LT |
1782 | { |
1783 | struct usb_hcd *hcd; | |
1784 | struct urb *urb; | |
1785 | ||
95cf82f9 AS |
1786 | if (!ep) |
1787 | return; | |
9a9bf406 | 1788 | might_sleep(); |
17200583 | 1789 | hcd = bus_to_hcd(udev->bus); |
1da177e4 | 1790 | |
95cf82f9 | 1791 | /* No more submits can occur */ |
9a9bf406 | 1792 | spin_lock_irq(&hcd_urb_list_lock); |
ddc1fd6a | 1793 | rescan: |
1da177e4 | 1794 | list_for_each_entry (urb, &ep->urb_list, urb_list) { |
5e60a161 | 1795 | int is_in; |
1da177e4 | 1796 | |
eb231054 | 1797 | if (urb->unlinked) |
1da177e4 LT |
1798 | continue; |
1799 | usb_get_urb (urb); | |
5e60a161 | 1800 | is_in = usb_urb_dir_in(urb); |
809a58b8 | 1801 | spin_unlock(&hcd_urb_list_lock); |
1da177e4 | 1802 | |
e9df41c5 AS |
1803 | /* kick hcd */ |
1804 | unlink1(hcd, urb, -ESHUTDOWN); | |
1805 | dev_dbg (hcd->self.controller, | |
1806 | "shutdown urb %p ep%d%s%s\n", | |
1807 | urb, usb_endpoint_num(&ep->desc), | |
1808 | is_in ? "in" : "out", | |
1809 | ({ char *s; | |
1810 | ||
1811 | switch (usb_endpoint_type(&ep->desc)) { | |
1812 | case USB_ENDPOINT_XFER_CONTROL: | |
1813 | s = ""; break; | |
1814 | case USB_ENDPOINT_XFER_BULK: | |
1815 | s = "-bulk"; break; | |
1816 | case USB_ENDPOINT_XFER_INT: | |
1817 | s = "-intr"; break; | |
1818 | default: | |
14557359 | 1819 | s = "-iso"; break; |
e9df41c5 AS |
1820 | }; |
1821 | s; | |
1822 | })); | |
1da177e4 LT |
1823 | usb_put_urb (urb); |
1824 | ||
1825 | /* list contents may have changed */ | |
ddc1fd6a | 1826 | spin_lock(&hcd_urb_list_lock); |
1da177e4 LT |
1827 | goto rescan; |
1828 | } | |
9a9bf406 | 1829 | spin_unlock_irq(&hcd_urb_list_lock); |
1da177e4 | 1830 | |
95cf82f9 | 1831 | /* Wait until the endpoint queue is completely empty */ |
455b25fb | 1832 | while (!list_empty (&ep->urb_list)) { |
809a58b8 | 1833 | spin_lock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1834 | |
1835 | /* The list may have changed while we acquired the spinlock */ | |
1836 | urb = NULL; | |
1837 | if (!list_empty (&ep->urb_list)) { | |
1838 | urb = list_entry (ep->urb_list.prev, struct urb, | |
1839 | urb_list); | |
1840 | usb_get_urb (urb); | |
1841 | } | |
809a58b8 | 1842 | spin_unlock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1843 | |
1844 | if (urb) { | |
1845 | usb_kill_urb (urb); | |
1846 | usb_put_urb (urb); | |
1847 | } | |
1848 | } | |
1da177e4 LT |
1849 | } |
1850 | ||
3f0479e0 | 1851 | /** |
70445ae6 RD |
1852 | * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds |
1853 | * the bus bandwidth | |
1854 | * @udev: target &usb_device | |
3f0479e0 SS |
1855 | * @new_config: new configuration to install |
1856 | * @cur_alt: the current alternate interface setting | |
1857 | * @new_alt: alternate interface setting that is being installed | |
1858 | * | |
1859 | * To change configurations, pass in the new configuration in new_config, | |
1860 | * and pass NULL for cur_alt and new_alt. | |
1861 | * | |
1862 | * To reset a device's configuration (put the device in the ADDRESSED state), | |
1863 | * pass in NULL for new_config, cur_alt, and new_alt. | |
1864 | * | |
1865 | * To change alternate interface settings, pass in NULL for new_config, | |
1866 | * pass in the current alternate interface setting in cur_alt, | |
1867 | * and pass in the new alternate interface setting in new_alt. | |
1868 | * | |
626f090c | 1869 | * Return: An error if the requested bandwidth change exceeds the |
3f0479e0 | 1870 | * bus bandwidth or host controller internal resources. |
79abb1ab | 1871 | */ |
3f0479e0 | 1872 | int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 1873 | struct usb_host_config *new_config, |
3f0479e0 SS |
1874 | struct usb_host_interface *cur_alt, |
1875 | struct usb_host_interface *new_alt) | |
79abb1ab SS |
1876 | { |
1877 | int num_intfs, i, j; | |
576a362a | 1878 | struct usb_host_interface *alt = NULL; |
79abb1ab SS |
1879 | int ret = 0; |
1880 | struct usb_hcd *hcd; | |
1881 | struct usb_host_endpoint *ep; | |
1882 | ||
1883 | hcd = bus_to_hcd(udev->bus); | |
1884 | if (!hcd->driver->check_bandwidth) | |
1885 | return 0; | |
1886 | ||
1887 | /* Configuration is being removed - set configuration 0 */ | |
3f0479e0 | 1888 | if (!new_config && !cur_alt) { |
79abb1ab SS |
1889 | for (i = 1; i < 16; ++i) { |
1890 | ep = udev->ep_out[i]; | |
1891 | if (ep) | |
1892 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1893 | ep = udev->ep_in[i]; | |
1894 | if (ep) | |
1895 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1896 | } | |
1897 | hcd->driver->check_bandwidth(hcd, udev); | |
1898 | return 0; | |
1899 | } | |
1900 | /* Check if the HCD says there's enough bandwidth. Enable all endpoints | |
1901 | * each interface's alt setting 0 and ask the HCD to check the bandwidth | |
1902 | * of the bus. There will always be bandwidth for endpoint 0, so it's | |
1903 | * ok to exclude it. | |
1904 | */ | |
1905 | if (new_config) { | |
1906 | num_intfs = new_config->desc.bNumInterfaces; | |
1907 | /* Remove endpoints (except endpoint 0, which is always on the | |
1908 | * schedule) from the old config from the schedule | |
1909 | */ | |
1910 | for (i = 1; i < 16; ++i) { | |
1911 | ep = udev->ep_out[i]; | |
1912 | if (ep) { | |
1913 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
1914 | if (ret < 0) | |
1915 | goto reset; | |
1916 | } | |
1917 | ep = udev->ep_in[i]; | |
1918 | if (ep) { | |
1919 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
1920 | if (ret < 0) | |
1921 | goto reset; | |
1922 | } | |
1923 | } | |
1924 | for (i = 0; i < num_intfs; ++i) { | |
d837e219 SS |
1925 | struct usb_host_interface *first_alt; |
1926 | int iface_num; | |
1927 | ||
1928 | first_alt = &new_config->intf_cache[i]->altsetting[0]; | |
1929 | iface_num = first_alt->desc.bInterfaceNumber; | |
91017f9c | 1930 | /* Set up endpoints for alternate interface setting 0 */ |
d837e219 | 1931 | alt = usb_find_alt_setting(new_config, iface_num, 0); |
3f0479e0 SS |
1932 | if (!alt) |
1933 | /* No alt setting 0? Pick the first setting. */ | |
d837e219 | 1934 | alt = first_alt; |
3f0479e0 | 1935 | |
79abb1ab SS |
1936 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { |
1937 | ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); | |
1938 | if (ret < 0) | |
1939 | goto reset; | |
1940 | } | |
1941 | } | |
1942 | } | |
3f0479e0 | 1943 | if (cur_alt && new_alt) { |
04a723ea SS |
1944 | struct usb_interface *iface = usb_ifnum_to_if(udev, |
1945 | cur_alt->desc.bInterfaceNumber); | |
1946 | ||
8a9af4fd SS |
1947 | if (!iface) |
1948 | return -EINVAL; | |
04a723ea SS |
1949 | if (iface->resetting_device) { |
1950 | /* | |
1951 | * The USB core just reset the device, so the xHCI host | |
1952 | * and the device will think alt setting 0 is installed. | |
1953 | * However, the USB core will pass in the alternate | |
1954 | * setting installed before the reset as cur_alt. Dig | |
1955 | * out the alternate setting 0 structure, or the first | |
1956 | * alternate setting if a broken device doesn't have alt | |
1957 | * setting 0. | |
1958 | */ | |
1959 | cur_alt = usb_altnum_to_altsetting(iface, 0); | |
1960 | if (!cur_alt) | |
1961 | cur_alt = &iface->altsetting[0]; | |
1962 | } | |
1963 | ||
3f0479e0 SS |
1964 | /* Drop all the endpoints in the current alt setting */ |
1965 | for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { | |
1966 | ret = hcd->driver->drop_endpoint(hcd, udev, | |
1967 | &cur_alt->endpoint[i]); | |
1968 | if (ret < 0) | |
1969 | goto reset; | |
1970 | } | |
1971 | /* Add all the endpoints in the new alt setting */ | |
1972 | for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { | |
1973 | ret = hcd->driver->add_endpoint(hcd, udev, | |
1974 | &new_alt->endpoint[i]); | |
1975 | if (ret < 0) | |
1976 | goto reset; | |
1977 | } | |
1978 | } | |
79abb1ab SS |
1979 | ret = hcd->driver->check_bandwidth(hcd, udev); |
1980 | reset: | |
1981 | if (ret < 0) | |
1982 | hcd->driver->reset_bandwidth(hcd, udev); | |
1983 | return ret; | |
1984 | } | |
1985 | ||
95cf82f9 AS |
1986 | /* Disables the endpoint: synchronizes with the hcd to make sure all |
1987 | * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must | |
1988 | * have been called previously. Use for set_configuration, set_interface, | |
1989 | * driver removal, physical disconnect. | |
1990 | * | |
1991 | * example: a qh stored in ep->hcpriv, holding state related to endpoint | |
1992 | * type, maxpacket size, toggle, halt status, and scheduling. | |
1993 | */ | |
1994 | void usb_hcd_disable_endpoint(struct usb_device *udev, | |
1995 | struct usb_host_endpoint *ep) | |
1996 | { | |
1997 | struct usb_hcd *hcd; | |
1998 | ||
1999 | might_sleep(); | |
2000 | hcd = bus_to_hcd(udev->bus); | |
2001 | if (hcd->driver->endpoint_disable) | |
2002 | hcd->driver->endpoint_disable(hcd, ep); | |
2003 | } | |
2004 | ||
3444b26a DV |
2005 | /** |
2006 | * usb_hcd_reset_endpoint - reset host endpoint state | |
2007 | * @udev: USB device. | |
2008 | * @ep: the endpoint to reset. | |
2009 | * | |
2010 | * Resets any host endpoint state such as the toggle bit, sequence | |
2011 | * number and current window. | |
2012 | */ | |
2013 | void usb_hcd_reset_endpoint(struct usb_device *udev, | |
2014 | struct usb_host_endpoint *ep) | |
2015 | { | |
2016 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
2017 | ||
2018 | if (hcd->driver->endpoint_reset) | |
2019 | hcd->driver->endpoint_reset(hcd, ep); | |
2020 | else { | |
2021 | int epnum = usb_endpoint_num(&ep->desc); | |
2022 | int is_out = usb_endpoint_dir_out(&ep->desc); | |
2023 | int is_control = usb_endpoint_xfer_control(&ep->desc); | |
2024 | ||
2025 | usb_settoggle(udev, epnum, is_out, 0); | |
2026 | if (is_control) | |
2027 | usb_settoggle(udev, epnum, !is_out, 0); | |
2028 | } | |
2029 | } | |
2030 | ||
eab1cafc SS |
2031 | /** |
2032 | * usb_alloc_streams - allocate bulk endpoint stream IDs. | |
2033 | * @interface: alternate setting that includes all endpoints. | |
2034 | * @eps: array of endpoints that need streams. | |
2035 | * @num_eps: number of endpoints in the array. | |
2036 | * @num_streams: number of streams to allocate. | |
2037 | * @mem_flags: flags hcd should use to allocate memory. | |
2038 | * | |
626f090c | 2039 | * Sets up a group of bulk endpoints to have @num_streams stream IDs available. |
eab1cafc SS |
2040 | * Drivers may queue multiple transfers to different stream IDs, which may |
2041 | * complete in a different order than they were queued. | |
626f090c YB |
2042 | * |
2043 | * Return: On success, the number of allocated streams. On failure, a negative | |
2044 | * error code. | |
eab1cafc SS |
2045 | */ |
2046 | int usb_alloc_streams(struct usb_interface *interface, | |
2047 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2048 | unsigned int num_streams, gfp_t mem_flags) | |
2049 | { | |
2050 | struct usb_hcd *hcd; | |
2051 | struct usb_device *dev; | |
2052 | int i; | |
2053 | ||
2054 | dev = interface_to_usbdev(interface); | |
2055 | hcd = bus_to_hcd(dev->bus); | |
2056 | if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) | |
2057 | return -EINVAL; | |
2058 | if (dev->speed != USB_SPEED_SUPER) | |
2059 | return -EINVAL; | |
2060 | ||
2061 | /* Streams only apply to bulk endpoints. */ | |
2062 | for (i = 0; i < num_eps; i++) | |
2063 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) | |
2064 | return -EINVAL; | |
2065 | ||
2066 | return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, | |
2067 | num_streams, mem_flags); | |
2068 | } | |
2069 | EXPORT_SYMBOL_GPL(usb_alloc_streams); | |
2070 | ||
2071 | /** | |
2072 | * usb_free_streams - free bulk endpoint stream IDs. | |
2073 | * @interface: alternate setting that includes all endpoints. | |
2074 | * @eps: array of endpoints to remove streams from. | |
2075 | * @num_eps: number of endpoints in the array. | |
2076 | * @mem_flags: flags hcd should use to allocate memory. | |
2077 | * | |
2078 | * Reverts a group of bulk endpoints back to not using stream IDs. | |
2079 | * Can fail if we are given bad arguments, or HCD is broken. | |
6c74dada HG |
2080 | * |
2081 | * Return: On success, the number of allocated streams. On failure, a negative | |
2082 | * error code. | |
eab1cafc | 2083 | */ |
6c74dada | 2084 | int usb_free_streams(struct usb_interface *interface, |
eab1cafc SS |
2085 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2086 | gfp_t mem_flags) | |
2087 | { | |
2088 | struct usb_hcd *hcd; | |
2089 | struct usb_device *dev; | |
2090 | int i; | |
2091 | ||
2092 | dev = interface_to_usbdev(interface); | |
2093 | hcd = bus_to_hcd(dev->bus); | |
2094 | if (dev->speed != USB_SPEED_SUPER) | |
6c74dada | 2095 | return -EINVAL; |
eab1cafc SS |
2096 | |
2097 | /* Streams only apply to bulk endpoints. */ | |
2098 | for (i = 0; i < num_eps; i++) | |
b214f191 | 2099 | if (!eps[i] || !usb_endpoint_xfer_bulk(&eps[i]->desc)) |
6c74dada | 2100 | return -EINVAL; |
eab1cafc | 2101 | |
6c74dada | 2102 | return hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); |
eab1cafc SS |
2103 | } |
2104 | EXPORT_SYMBOL_GPL(usb_free_streams); | |
2105 | ||
cde217a5 AS |
2106 | /* Protect against drivers that try to unlink URBs after the device |
2107 | * is gone, by waiting until all unlinks for @udev are finished. | |
2108 | * Since we don't currently track URBs by device, simply wait until | |
2109 | * nothing is running in the locked region of usb_hcd_unlink_urb(). | |
2110 | */ | |
2111 | void usb_hcd_synchronize_unlinks(struct usb_device *udev) | |
2112 | { | |
2113 | spin_lock_irq(&hcd_urb_unlink_lock); | |
2114 | spin_unlock_irq(&hcd_urb_unlink_lock); | |
2115 | } | |
2116 | ||
1da177e4 LT |
2117 | /*-------------------------------------------------------------------------*/ |
2118 | ||
32aca560 AS |
2119 | /* called in any context */ |
2120 | int usb_hcd_get_frame_number (struct usb_device *udev) | |
2121 | { | |
2122 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
2123 | ||
9b37596a | 2124 | if (!HCD_RH_RUNNING(hcd)) |
32aca560 AS |
2125 | return -ESHUTDOWN; |
2126 | return hcd->driver->get_frame_number (hcd); | |
2127 | } | |
2128 | ||
2129 | /*-------------------------------------------------------------------------*/ | |
2130 | ||
9293677a | 2131 | #ifdef CONFIG_PM |
1da177e4 | 2132 | |
65bfd296 | 2133 | int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 2134 | { |
686314cf AS |
2135 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
2136 | int status; | |
2137 | int old_state = hcd->state; | |
1da177e4 | 2138 | |
30b1a7a3 AS |
2139 | dev_dbg(&rhdev->dev, "bus %ssuspend, wakeup %d\n", |
2140 | (PMSG_IS_AUTO(msg) ? "auto-" : ""), | |
2141 | rhdev->do_remote_wakeup); | |
9b37596a AS |
2142 | if (HCD_DEAD(hcd)) { |
2143 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); | |
2144 | return 0; | |
2145 | } | |
2146 | ||
686314cf AS |
2147 | if (!hcd->driver->bus_suspend) { |
2148 | status = -ENOENT; | |
2149 | } else { | |
9b37596a | 2150 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
686314cf AS |
2151 | hcd->state = HC_STATE_QUIESCING; |
2152 | status = hcd->driver->bus_suspend(hcd); | |
2153 | } | |
2154 | if (status == 0) { | |
2155 | usb_set_device_state(rhdev, USB_STATE_SUSPENDED); | |
9293677a | 2156 | hcd->state = HC_STATE_SUSPENDED; |
879d38e6 AS |
2157 | |
2158 | /* Did we race with a root-hub wakeup event? */ | |
2159 | if (rhdev->do_remote_wakeup) { | |
2160 | char buffer[6]; | |
2161 | ||
2162 | status = hcd->driver->hub_status_data(hcd, buffer); | |
2163 | if (status != 0) { | |
2164 | dev_dbg(&rhdev->dev, "suspend raced with wakeup event\n"); | |
2165 | hcd_bus_resume(rhdev, PMSG_AUTO_RESUME); | |
2166 | status = -EBUSY; | |
2167 | } | |
2168 | } | |
686314cf | 2169 | } else { |
9b37596a AS |
2170 | spin_lock_irq(&hcd_root_hub_lock); |
2171 | if (!HCD_DEAD(hcd)) { | |
2172 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2173 | hcd->state = old_state; | |
2174 | } | |
2175 | spin_unlock_irq(&hcd_root_hub_lock); | |
686314cf | 2176 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2177 | "suspend", status); |
686314cf | 2178 | } |
9293677a | 2179 | return status; |
1da177e4 LT |
2180 | } |
2181 | ||
65bfd296 | 2182 | int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 2183 | { |
686314cf AS |
2184 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
2185 | int status; | |
cfa59dab | 2186 | int old_state = hcd->state; |
1da177e4 | 2187 | |
30b1a7a3 AS |
2188 | dev_dbg(&rhdev->dev, "usb %sresume\n", |
2189 | (PMSG_IS_AUTO(msg) ? "auto-" : "")); | |
9b37596a AS |
2190 | if (HCD_DEAD(hcd)) { |
2191 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); | |
2192 | return 0; | |
2193 | } | |
0c0382e3 | 2194 | if (!hcd->driver->bus_resume) |
9293677a | 2195 | return -ENOENT; |
9b37596a | 2196 | if (HCD_RH_RUNNING(hcd)) |
979d5199 | 2197 | return 0; |
686314cf | 2198 | |
9293677a | 2199 | hcd->state = HC_STATE_RESUMING; |
686314cf | 2200 | status = hcd->driver->bus_resume(hcd); |
bf3d7d40 | 2201 | clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
686314cf | 2202 | if (status == 0) { |
bfd1e910 AS |
2203 | struct usb_device *udev; |
2204 | int port1; | |
2205 | ||
9b37596a AS |
2206 | spin_lock_irq(&hcd_root_hub_lock); |
2207 | if (!HCD_DEAD(hcd)) { | |
2208 | usb_set_device_state(rhdev, rhdev->actconfig | |
2209 | ? USB_STATE_CONFIGURED | |
2210 | : USB_STATE_ADDRESS); | |
2211 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2212 | hcd->state = HC_STATE_RUNNING; | |
2213 | } | |
2214 | spin_unlock_irq(&hcd_root_hub_lock); | |
bfd1e910 AS |
2215 | |
2216 | /* | |
2217 | * Check whether any of the enabled ports on the root hub are | |
2218 | * unsuspended. If they are then a TRSMRCY delay is needed | |
2219 | * (this is what the USB-2 spec calls a "global resume"). | |
2220 | * Otherwise we can skip the delay. | |
2221 | */ | |
2222 | usb_hub_for_each_child(rhdev, port1, udev) { | |
2223 | if (udev->state != USB_STATE_NOTATTACHED && | |
2224 | !udev->port_is_suspended) { | |
2225 | usleep_range(10000, 11000); /* TRSMRCY */ | |
2226 | break; | |
2227 | } | |
2228 | } | |
686314cf | 2229 | } else { |
cfa59dab | 2230 | hcd->state = old_state; |
686314cf | 2231 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2232 | "resume", status); |
cfa59dab AS |
2233 | if (status != -ESHUTDOWN) |
2234 | usb_hc_died(hcd); | |
9293677a DB |
2235 | } |
2236 | return status; | |
1da177e4 LT |
2237 | } |
2238 | ||
9bbdf1e0 AS |
2239 | #endif /* CONFIG_PM */ |
2240 | ||
84ebc102 | 2241 | #ifdef CONFIG_PM_RUNTIME |
9bbdf1e0 | 2242 | |
6b157c9b AS |
2243 | /* Workqueue routine for root-hub remote wakeup */ |
2244 | static void hcd_resume_work(struct work_struct *work) | |
2245 | { | |
2246 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); | |
2247 | struct usb_device *udev = hcd->self.root_hub; | |
2248 | ||
2249 | usb_lock_device(udev); | |
0534d468 | 2250 | usb_remote_wakeup(udev); |
6b157c9b AS |
2251 | usb_unlock_device(udev); |
2252 | } | |
2253 | ||
1da177e4 | 2254 | /** |
14557359 | 2255 | * usb_hcd_resume_root_hub - called by HCD to resume its root hub |
1da177e4 LT |
2256 | * @hcd: host controller for this root hub |
2257 | * | |
2258 | * The USB host controller calls this function when its root hub is | |
2259 | * suspended (with the remote wakeup feature enabled) and a remote | |
6b157c9b AS |
2260 | * wakeup request is received. The routine submits a workqueue request |
2261 | * to resume the root hub (that is, manage its downstream ports again). | |
1da177e4 LT |
2262 | */ |
2263 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) | |
2264 | { | |
2265 | unsigned long flags; | |
2266 | ||
2267 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
ff2f0787 AS |
2268 | if (hcd->rh_registered) { |
2269 | set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); | |
9bbdf1e0 | 2270 | queue_work(pm_wq, &hcd->wakeup_work); |
ff2f0787 | 2271 | } |
1da177e4 LT |
2272 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
2273 | } | |
9293677a | 2274 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
1da177e4 | 2275 | |
84ebc102 | 2276 | #endif /* CONFIG_PM_RUNTIME */ |
1da177e4 LT |
2277 | |
2278 | /*-------------------------------------------------------------------------*/ | |
2279 | ||
2280 | #ifdef CONFIG_USB_OTG | |
2281 | ||
2282 | /** | |
2283 | * usb_bus_start_enum - start immediate enumeration (for OTG) | |
2284 | * @bus: the bus (must use hcd framework) | |
2285 | * @port_num: 1-based number of port; usually bus->otg_port | |
2286 | * Context: in_interrupt() | |
2287 | * | |
2288 | * Starts enumeration, with an immediate reset followed later by | |
2289 | * khubd identifying and possibly configuring the device. | |
2290 | * This is needed by OTG controller drivers, where it helps meet | |
2291 | * HNP protocol timing requirements for starting a port reset. | |
626f090c YB |
2292 | * |
2293 | * Return: 0 if successful. | |
1da177e4 LT |
2294 | */ |
2295 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) | |
2296 | { | |
2297 | struct usb_hcd *hcd; | |
2298 | int status = -EOPNOTSUPP; | |
2299 | ||
2300 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, | |
2301 | * boards with root hubs hooked up to internal devices (instead of | |
2302 | * just the OTG port) may need more attention to resetting... | |
2303 | */ | |
2304 | hcd = container_of (bus, struct usb_hcd, self); | |
2305 | if (port_num && hcd->driver->start_port_reset) | |
2306 | status = hcd->driver->start_port_reset(hcd, port_num); | |
2307 | ||
2308 | /* run khubd shortly after (first) root port reset finishes; | |
2309 | * it may issue others, until at least 50 msecs have passed. | |
2310 | */ | |
2311 | if (status == 0) | |
2312 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); | |
2313 | return status; | |
2314 | } | |
782e70c6 | 2315 | EXPORT_SYMBOL_GPL(usb_bus_start_enum); |
1da177e4 LT |
2316 | |
2317 | #endif | |
2318 | ||
2319 | /*-------------------------------------------------------------------------*/ | |
2320 | ||
1da177e4 LT |
2321 | /** |
2322 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) | |
2323 | * @irq: the IRQ being raised | |
2324 | * @__hcd: pointer to the HCD whose IRQ is being signaled | |
1da177e4 LT |
2325 | * |
2326 | * If the controller isn't HALTed, calls the driver's irq handler. | |
2327 | * Checks whether the controller is now dead. | |
626f090c YB |
2328 | * |
2329 | * Return: %IRQ_HANDLED if the IRQ was handled. %IRQ_NONE otherwise. | |
1da177e4 | 2330 | */ |
7d12e780 | 2331 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
1da177e4 LT |
2332 | { |
2333 | struct usb_hcd *hcd = __hcd; | |
de85422b | 2334 | irqreturn_t rc; |
1da177e4 | 2335 | |
968b822c | 2336 | if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) |
de85422b | 2337 | rc = IRQ_NONE; |
968b822c | 2338 | else if (hcd->driver->irq(hcd) == IRQ_NONE) |
de85422b | 2339 | rc = IRQ_NONE; |
968b822c | 2340 | else |
de85422b | 2341 | rc = IRQ_HANDLED; |
de85422b | 2342 | |
de85422b | 2343 | return rc; |
1da177e4 | 2344 | } |
43b86af8 | 2345 | EXPORT_SYMBOL_GPL(usb_hcd_irq); |
1da177e4 LT |
2346 | |
2347 | /*-------------------------------------------------------------------------*/ | |
2348 | ||
2349 | /** | |
2350 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) | |
2351 | * @hcd: pointer to the HCD representing the controller | |
2352 | * | |
2353 | * This is called by bus glue to report a USB host controller that died | |
2354 | * while operations may still have been pending. It's called automatically | |
c5635437 SS |
2355 | * by the PCI glue, so only glue for non-PCI busses should need to call it. |
2356 | * | |
2357 | * Only call this function with the primary HCD. | |
1da177e4 LT |
2358 | */ |
2359 | void usb_hc_died (struct usb_hcd *hcd) | |
2360 | { | |
2361 | unsigned long flags; | |
2362 | ||
2363 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); | |
2364 | ||
2365 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
9b37596a AS |
2366 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
2367 | set_bit(HCD_FLAG_DEAD, &hcd->flags); | |
1da177e4 | 2368 | if (hcd->rh_registered) { |
541c7d43 | 2369 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1da177e4 LT |
2370 | |
2371 | /* make khubd clean up old urbs and devices */ | |
2372 | usb_set_device_state (hcd->self.root_hub, | |
2373 | USB_STATE_NOTATTACHED); | |
2374 | usb_kick_khubd (hcd->self.root_hub); | |
2375 | } | |
c5635437 SS |
2376 | if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { |
2377 | hcd = hcd->shared_hcd; | |
2378 | if (hcd->rh_registered) { | |
2379 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
2380 | ||
2381 | /* make khubd clean up old urbs and devices */ | |
2382 | usb_set_device_state(hcd->self.root_hub, | |
2383 | USB_STATE_NOTATTACHED); | |
2384 | usb_kick_khubd(hcd->self.root_hub); | |
2385 | } | |
2386 | } | |
1da177e4 | 2387 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
c5635437 | 2388 | /* Make sure that the other roothub is also deallocated. */ |
1da177e4 LT |
2389 | } |
2390 | EXPORT_SYMBOL_GPL (usb_hc_died); | |
2391 | ||
2392 | /*-------------------------------------------------------------------------*/ | |
2393 | ||
94dfd7ed ML |
2394 | static void init_giveback_urb_bh(struct giveback_urb_bh *bh) |
2395 | { | |
2396 | ||
2397 | spin_lock_init(&bh->lock); | |
2398 | INIT_LIST_HEAD(&bh->head); | |
2399 | tasklet_init(&bh->bh, usb_giveback_urb_bh, (unsigned long)bh); | |
2400 | } | |
2401 | ||
1da177e4 | 2402 | /** |
c5635437 | 2403 | * usb_create_shared_hcd - create and initialize an HCD structure |
1da177e4 LT |
2404 | * @driver: HC driver that will use this hcd |
2405 | * @dev: device for this HC, stored in hcd->self.controller | |
2406 | * @bus_name: value to store in hcd->self.bus_name | |
c5635437 SS |
2407 | * @primary_hcd: a pointer to the usb_hcd structure that is sharing the |
2408 | * PCI device. Only allocate certain resources for the primary HCD | |
1da177e4 LT |
2409 | * Context: !in_interrupt() |
2410 | * | |
2411 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2412 | * HC driver's private data. Initialize the generic members of the | |
2413 | * hcd structure. | |
2414 | * | |
626f090c YB |
2415 | * Return: On success, a pointer to the created and initialized HCD structure. |
2416 | * On failure (e.g. if memory is unavailable), %NULL. | |
1da177e4 | 2417 | */ |
c5635437 SS |
2418 | struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
2419 | struct device *dev, const char *bus_name, | |
2420 | struct usb_hcd *primary_hcd) | |
1da177e4 LT |
2421 | { |
2422 | struct usb_hcd *hcd; | |
2423 | ||
7b842b6e | 2424 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
1da177e4 LT |
2425 | if (!hcd) { |
2426 | dev_dbg (dev, "hcd alloc failed\n"); | |
2427 | return NULL; | |
2428 | } | |
c5635437 SS |
2429 | if (primary_hcd == NULL) { |
2430 | hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), | |
2431 | GFP_KERNEL); | |
2432 | if (!hcd->bandwidth_mutex) { | |
2433 | kfree(hcd); | |
2434 | dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); | |
2435 | return NULL; | |
2436 | } | |
2437 | mutex_init(hcd->bandwidth_mutex); | |
2438 | dev_set_drvdata(dev, hcd); | |
2439 | } else { | |
2440 | hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; | |
2441 | hcd->primary_hcd = primary_hcd; | |
2442 | primary_hcd->primary_hcd = primary_hcd; | |
2443 | hcd->shared_hcd = primary_hcd; | |
2444 | primary_hcd->shared_hcd = hcd; | |
d673bfcb | 2445 | } |
d673bfcb | 2446 | |
17200583 | 2447 | kref_init(&hcd->kref); |
1da177e4 LT |
2448 | |
2449 | usb_bus_init(&hcd->self); | |
1da177e4 LT |
2450 | hcd->self.controller = dev; |
2451 | hcd->self.bus_name = bus_name; | |
dd990f16 | 2452 | hcd->self.uses_dma = (dev->dma_mask != NULL); |
1da177e4 LT |
2453 | |
2454 | init_timer(&hcd->rh_timer); | |
d5926ae7 AS |
2455 | hcd->rh_timer.function = rh_timer_func; |
2456 | hcd->rh_timer.data = (unsigned long) hcd; | |
84ebc102 | 2457 | #ifdef CONFIG_PM_RUNTIME |
6b157c9b AS |
2458 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); |
2459 | #endif | |
1da177e4 LT |
2460 | |
2461 | hcd->driver = driver; | |
83de4b2b | 2462 | hcd->speed = driver->flags & HCD_MASK; |
1da177e4 LT |
2463 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : |
2464 | "USB Host Controller"; | |
1da177e4 LT |
2465 | return hcd; |
2466 | } | |
c5635437 SS |
2467 | EXPORT_SYMBOL_GPL(usb_create_shared_hcd); |
2468 | ||
2469 | /** | |
2470 | * usb_create_hcd - create and initialize an HCD structure | |
2471 | * @driver: HC driver that will use this hcd | |
2472 | * @dev: device for this HC, stored in hcd->self.controller | |
2473 | * @bus_name: value to store in hcd->self.bus_name | |
2474 | * Context: !in_interrupt() | |
2475 | * | |
2476 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2477 | * HC driver's private data. Initialize the generic members of the | |
2478 | * hcd structure. | |
2479 | * | |
626f090c YB |
2480 | * Return: On success, a pointer to the created and initialized HCD |
2481 | * structure. On failure (e.g. if memory is unavailable), %NULL. | |
c5635437 SS |
2482 | */ |
2483 | struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, | |
2484 | struct device *dev, const char *bus_name) | |
2485 | { | |
2486 | return usb_create_shared_hcd(driver, dev, bus_name, NULL); | |
2487 | } | |
782e70c6 | 2488 | EXPORT_SYMBOL_GPL(usb_create_hcd); |
1da177e4 | 2489 | |
c5635437 SS |
2490 | /* |
2491 | * Roothubs that share one PCI device must also share the bandwidth mutex. | |
2492 | * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is | |
2493 | * deallocated. | |
2494 | * | |
2495 | * Make sure to only deallocate the bandwidth_mutex when the primary HCD is | |
2496 | * freed. When hcd_release() is called for the non-primary HCD, set the | |
2497 | * primary_hcd's shared_hcd pointer to null (since the non-primary HCD will be | |
2498 | * freed shortly). | |
2499 | */ | |
17200583 AS |
2500 | static void hcd_release (struct kref *kref) |
2501 | { | |
2502 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); | |
2503 | ||
c5635437 SS |
2504 | if (usb_hcd_is_primary_hcd(hcd)) |
2505 | kfree(hcd->bandwidth_mutex); | |
2506 | else | |
2507 | hcd->shared_hcd->shared_hcd = NULL; | |
17200583 AS |
2508 | kfree(hcd); |
2509 | } | |
2510 | ||
2511 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) | |
2512 | { | |
2513 | if (hcd) | |
2514 | kref_get (&hcd->kref); | |
2515 | return hcd; | |
2516 | } | |
782e70c6 | 2517 | EXPORT_SYMBOL_GPL(usb_get_hcd); |
17200583 | 2518 | |
1da177e4 LT |
2519 | void usb_put_hcd (struct usb_hcd *hcd) |
2520 | { | |
17200583 AS |
2521 | if (hcd) |
2522 | kref_put (&hcd->kref, hcd_release); | |
1da177e4 | 2523 | } |
782e70c6 | 2524 | EXPORT_SYMBOL_GPL(usb_put_hcd); |
1da177e4 | 2525 | |
c5635437 SS |
2526 | int usb_hcd_is_primary_hcd(struct usb_hcd *hcd) |
2527 | { | |
2528 | if (!hcd->primary_hcd) | |
2529 | return 1; | |
2530 | return hcd == hcd->primary_hcd; | |
2531 | } | |
2532 | EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); | |
2533 | ||
3f5eb141 LT |
2534 | int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1) |
2535 | { | |
2536 | if (!hcd->driver->find_raw_port_number) | |
2537 | return port1; | |
2538 | ||
2539 | return hcd->driver->find_raw_port_number(hcd, port1); | |
2540 | } | |
2541 | ||
23e0d106 SS |
2542 | static int usb_hcd_request_irqs(struct usb_hcd *hcd, |
2543 | unsigned int irqnum, unsigned long irqflags) | |
2544 | { | |
2545 | int retval; | |
2546 | ||
2547 | if (hcd->driver->irq) { | |
e592c5d0 | 2548 | |
23e0d106 SS |
2549 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", |
2550 | hcd->driver->description, hcd->self.busnum); | |
2551 | retval = request_irq(irqnum, &usb_hcd_irq, irqflags, | |
2552 | hcd->irq_descr, hcd); | |
2553 | if (retval != 0) { | |
2554 | dev_err(hcd->self.controller, | |
2555 | "request interrupt %d failed\n", | |
2556 | irqnum); | |
2557 | return retval; | |
2558 | } | |
2559 | hcd->irq = irqnum; | |
2560 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, | |
2561 | (hcd->driver->flags & HCD_MEMORY) ? | |
2562 | "io mem" : "io base", | |
2563 | (unsigned long long)hcd->rsrc_start); | |
2564 | } else { | |
cd70469d | 2565 | hcd->irq = 0; |
23e0d106 SS |
2566 | if (hcd->rsrc_start) |
2567 | dev_info(hcd->self.controller, "%s 0x%08llx\n", | |
2568 | (hcd->driver->flags & HCD_MEMORY) ? | |
2569 | "io mem" : "io base", | |
2570 | (unsigned long long)hcd->rsrc_start); | |
2571 | } | |
2572 | return 0; | |
2573 | } | |
2574 | ||
1da177e4 LT |
2575 | /** |
2576 | * usb_add_hcd - finish generic HCD structure initialization and register | |
2577 | * @hcd: the usb_hcd structure to initialize | |
2578 | * @irqnum: Interrupt line to allocate | |
2579 | * @irqflags: Interrupt type flags | |
2580 | * | |
2581 | * Finish the remaining parts of generic HCD initialization: allocate the | |
2582 | * buffers of consistent memory, register the bus, request the IRQ line, | |
2583 | * and call the driver's reset() and start() routines. | |
2584 | */ | |
2585 | int usb_add_hcd(struct usb_hcd *hcd, | |
2586 | unsigned int irqnum, unsigned long irqflags) | |
2587 | { | |
8ec8d20b AS |
2588 | int retval; |
2589 | struct usb_device *rhdev; | |
1da177e4 | 2590 | |
1ae5799e VB |
2591 | if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->phy) { |
2592 | struct usb_phy *phy = usb_get_phy_dev(hcd->self.controller, 0); | |
2593 | ||
2594 | if (IS_ERR(phy)) { | |
2595 | retval = PTR_ERR(phy); | |
2596 | if (retval == -EPROBE_DEFER) | |
2597 | return retval; | |
2598 | } else { | |
2599 | retval = usb_phy_init(phy); | |
2600 | if (retval) { | |
2601 | usb_put_phy(phy); | |
2602 | return retval; | |
2603 | } | |
2604 | hcd->phy = phy; | |
2605 | hcd->remove_phy = 1; | |
2606 | } | |
2607 | } | |
2608 | ||
1da177e4 LT |
2609 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); |
2610 | ||
c4fc2342 CDH |
2611 | /* Keep old behaviour if authorized_default is not in [0, 1]. */ |
2612 | if (authorized_default < 0 || authorized_default > 1) | |
14557359 | 2613 | hcd->authorized_default = hcd->wireless ? 0 : 1; |
c4fc2342 CDH |
2614 | else |
2615 | hcd->authorized_default = authorized_default; | |
8de98402 BH |
2616 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
2617 | ||
b1e8f0a6 DB |
2618 | /* HC is in reset state, but accessible. Now do the one-time init, |
2619 | * bottom up so that hcds can customize the root hubs before khubd | |
2620 | * starts talking to them. (Note, bus id is assigned early too.) | |
2621 | */ | |
1da177e4 LT |
2622 | if ((retval = hcd_buffer_create(hcd)) != 0) { |
2623 | dev_dbg(hcd->self.controller, "pool alloc failed\n"); | |
103e127d | 2624 | goto err_remove_phy; |
1da177e4 LT |
2625 | } |
2626 | ||
2627 | if ((retval = usb_register_bus(&hcd->self)) < 0) | |
8ec8d20b | 2628 | goto err_register_bus; |
1da177e4 | 2629 | |
b1e8f0a6 DB |
2630 | if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { |
2631 | dev_err(hcd->self.controller, "unable to allocate root hub\n"); | |
2632 | retval = -ENOMEM; | |
2633 | goto err_allocate_root_hub; | |
2634 | } | |
6d88e679 | 2635 | hcd->self.root_hub = rhdev; |
6b403b02 | 2636 | |
83de4b2b | 2637 | switch (hcd->speed) { |
6b403b02 SS |
2638 | case HCD_USB11: |
2639 | rhdev->speed = USB_SPEED_FULL; | |
2640 | break; | |
2641 | case HCD_USB2: | |
2642 | rhdev->speed = USB_SPEED_HIGH; | |
2643 | break; | |
1a81f881 TP |
2644 | case HCD_USB25: |
2645 | rhdev->speed = USB_SPEED_WIRELESS; | |
2646 | break; | |
6b403b02 SS |
2647 | case HCD_USB3: |
2648 | rhdev->speed = USB_SPEED_SUPER; | |
2649 | break; | |
2650 | default: | |
1d15ee4c | 2651 | retval = -EINVAL; |
96e077ae | 2652 | goto err_set_rh_speed; |
6b403b02 | 2653 | } |
b1e8f0a6 | 2654 | |
db4cefaa DB |
2655 | /* wakeup flag init defaults to "everything works" for root hubs, |
2656 | * but drivers can override it in reset() if needed, along with | |
2657 | * recording the overall controller's system wakeup capability. | |
2658 | */ | |
a6eeeb9f | 2659 | device_set_wakeup_capable(&rhdev->dev, 1); |
db4cefaa | 2660 | |
9b37596a AS |
2661 | /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is |
2662 | * registered. But since the controller can die at any time, | |
2663 | * let's initialize the flag before touching the hardware. | |
2664 | */ | |
2665 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2666 | ||
b1e8f0a6 DB |
2667 | /* "reset" is misnamed; its role is now one-time init. the controller |
2668 | * should already have been reset (and boot firmware kicked off etc). | |
2669 | */ | |
2670 | if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { | |
c10750b2 | 2671 | dev_err(hcd->self.controller, "can't setup: %d\n", retval); |
b1e8f0a6 DB |
2672 | goto err_hcd_driver_setup; |
2673 | } | |
6d88e679 | 2674 | hcd->rh_pollable = 1; |
b1e8f0a6 | 2675 | |
fb669cc0 DB |
2676 | /* NOTE: root hub and controller capabilities may not be the same */ |
2677 | if (device_can_wakeup(hcd->self.controller) | |
2678 | && device_can_wakeup(&hcd->self.root_hub->dev)) | |
b1e8f0a6 | 2679 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
b1e8f0a6 | 2680 | |
94dfd7ed ML |
2681 | /* initialize tasklets */ |
2682 | init_giveback_urb_bh(&hcd->high_prio_bh); | |
2683 | init_giveback_urb_bh(&hcd->low_prio_bh); | |
2684 | ||
68d07f64 SS |
2685 | /* enable irqs just before we start the controller, |
2686 | * if the BIOS provides legacy PCI irqs. | |
2687 | */ | |
2688 | if (usb_hcd_is_primary_hcd(hcd) && irqnum) { | |
c5635437 SS |
2689 | retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); |
2690 | if (retval) | |
2691 | goto err_request_irq; | |
2692 | } | |
1da177e4 | 2693 | |
4814030c | 2694 | hcd->state = HC_STATE_RUNNING; |
abc4f9b0 SS |
2695 | retval = hcd->driver->start(hcd); |
2696 | if (retval < 0) { | |
1da177e4 | 2697 | dev_err(hcd->self.controller, "startup error %d\n", retval); |
8ec8d20b | 2698 | goto err_hcd_driver_start; |
1da177e4 LT |
2699 | } |
2700 | ||
b1e8f0a6 | 2701 | /* starting here, usbcore will pay attention to this root hub */ |
b1e8f0a6 | 2702 | if ((retval = register_root_hub(hcd)) != 0) |
8ec8d20b AS |
2703 | goto err_register_root_hub; |
2704 | ||
5234ce1b IPG |
2705 | retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
2706 | if (retval < 0) { | |
2707 | printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", | |
2708 | retval); | |
2709 | goto error_create_attr_group; | |
2710 | } | |
541c7d43 | 2711 | if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) |
d5926ae7 | 2712 | usb_hcd_poll_rh_status(hcd); |
a6eeeb9f | 2713 | |
1da177e4 LT |
2714 | return retval; |
2715 | ||
5234ce1b | 2716 | error_create_attr_group: |
9b37596a | 2717 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
96e077ae AS |
2718 | if (HC_IS_RUNNING(hcd->state)) |
2719 | hcd->state = HC_STATE_QUIESCING; | |
2720 | spin_lock_irq(&hcd_root_hub_lock); | |
2721 | hcd->rh_registered = 0; | |
2722 | spin_unlock_irq(&hcd_root_hub_lock); | |
2723 | ||
84ebc102 | 2724 | #ifdef CONFIG_PM_RUNTIME |
96e077ae AS |
2725 | cancel_work_sync(&hcd->wakeup_work); |
2726 | #endif | |
5234ce1b | 2727 | mutex_lock(&usb_bus_list_lock); |
6d88e679 | 2728 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
5234ce1b | 2729 | mutex_unlock(&usb_bus_list_lock); |
b1e8f0a6 | 2730 | err_register_root_hub: |
6d88e679 | 2731 | hcd->rh_pollable = 0; |
541c7d43 | 2732 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 | 2733 | del_timer_sync(&hcd->rh_timer); |
8ec8d20b | 2734 | hcd->driver->stop(hcd); |
96e077ae | 2735 | hcd->state = HC_STATE_HALT; |
541c7d43 | 2736 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
96e077ae | 2737 | del_timer_sync(&hcd->rh_timer); |
b1e8f0a6 | 2738 | err_hcd_driver_start: |
cd70469d | 2739 | if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) |
1da177e4 | 2740 | free_irq(irqnum, hcd); |
b1e8f0a6 DB |
2741 | err_request_irq: |
2742 | err_hcd_driver_setup: | |
96e077ae | 2743 | err_set_rh_speed: |
6d88e679 | 2744 | usb_put_dev(hcd->self.root_hub); |
b1e8f0a6 | 2745 | err_allocate_root_hub: |
1da177e4 | 2746 | usb_deregister_bus(&hcd->self); |
b1e8f0a6 | 2747 | err_register_bus: |
1da177e4 | 2748 | hcd_buffer_destroy(hcd); |
103e127d VB |
2749 | err_remove_phy: |
2750 | if (hcd->remove_phy && hcd->phy) { | |
2751 | usb_phy_shutdown(hcd->phy); | |
2752 | usb_put_phy(hcd->phy); | |
2753 | hcd->phy = NULL; | |
2754 | } | |
1da177e4 | 2755 | return retval; |
14557359 | 2756 | } |
782e70c6 | 2757 | EXPORT_SYMBOL_GPL(usb_add_hcd); |
1da177e4 LT |
2758 | |
2759 | /** | |
2760 | * usb_remove_hcd - shutdown processing for generic HCDs | |
2761 | * @hcd: the usb_hcd structure to remove | |
2762 | * Context: !in_interrupt() | |
2763 | * | |
2764 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), | |
2765 | * invoking the HCD's stop() method. | |
2766 | */ | |
2767 | void usb_remove_hcd(struct usb_hcd *hcd) | |
2768 | { | |
6d88e679 AS |
2769 | struct usb_device *rhdev = hcd->self.root_hub; |
2770 | ||
1da177e4 LT |
2771 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); |
2772 | ||
6d88e679 AS |
2773 | usb_get_dev(rhdev); |
2774 | sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); | |
96e077ae | 2775 | |
9b37596a | 2776 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
1da177e4 LT |
2777 | if (HC_IS_RUNNING (hcd->state)) |
2778 | hcd->state = HC_STATE_QUIESCING; | |
2779 | ||
2780 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); | |
2781 | spin_lock_irq (&hcd_root_hub_lock); | |
2782 | hcd->rh_registered = 0; | |
2783 | spin_unlock_irq (&hcd_root_hub_lock); | |
9ad3d6cc | 2784 | |
84ebc102 | 2785 | #ifdef CONFIG_PM_RUNTIME |
d5d4db70 | 2786 | cancel_work_sync(&hcd->wakeup_work); |
6b157c9b AS |
2787 | #endif |
2788 | ||
4186ecf8 | 2789 | mutex_lock(&usb_bus_list_lock); |
6d88e679 | 2790 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
4186ecf8 | 2791 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 2792 | |
94dfd7ed ML |
2793 | /* |
2794 | * tasklet_kill() isn't needed here because: | |
2795 | * - driver's disconnect() called from usb_disconnect() should | |
2796 | * make sure its URBs are completed during the disconnect() | |
2797 | * callback | |
2798 | * | |
2799 | * - it is too late to run complete() here since driver may have | |
2800 | * been removed already now | |
2801 | */ | |
2802 | ||
6d88e679 AS |
2803 | /* Prevent any more root-hub status calls from the timer. |
2804 | * The HCD might still restart the timer (if a port status change | |
2805 | * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke | |
2806 | * the hub_status_data() callback. | |
2807 | */ | |
2808 | hcd->rh_pollable = 0; | |
541c7d43 | 2809 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 AS |
2810 | del_timer_sync(&hcd->rh_timer); |
2811 | ||
1da177e4 LT |
2812 | hcd->driver->stop(hcd); |
2813 | hcd->state = HC_STATE_HALT; | |
2814 | ||
6d88e679 | 2815 | /* In case the HCD restarted the timer, stop it again. */ |
541c7d43 | 2816 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1b42ae6d AS |
2817 | del_timer_sync(&hcd->rh_timer); |
2818 | ||
c5635437 | 2819 | if (usb_hcd_is_primary_hcd(hcd)) { |
cd70469d | 2820 | if (hcd->irq > 0) |
c5635437 SS |
2821 | free_irq(hcd->irq, hcd); |
2822 | } | |
6d88e679 AS |
2823 | |
2824 | usb_put_dev(hcd->self.root_hub); | |
1da177e4 LT |
2825 | usb_deregister_bus(&hcd->self); |
2826 | hcd_buffer_destroy(hcd); | |
103e127d VB |
2827 | if (hcd->remove_phy && hcd->phy) { |
2828 | usb_phy_shutdown(hcd->phy); | |
2829 | usb_put_phy(hcd->phy); | |
2830 | hcd->phy = NULL; | |
2831 | } | |
1da177e4 | 2832 | } |
782e70c6 | 2833 | EXPORT_SYMBOL_GPL(usb_remove_hcd); |
1da177e4 | 2834 | |
64a21d02 | 2835 | void |
842c1960 | 2836 | usb_hcd_platform_shutdown(struct platform_device *dev) |
64a21d02 AG |
2837 | { |
2838 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
2839 | ||
2840 | if (hcd->driver->shutdown) | |
2841 | hcd->driver->shutdown(hcd); | |
2842 | } | |
782e70c6 | 2843 | EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); |
64a21d02 | 2844 | |
1da177e4 LT |
2845 | /*-------------------------------------------------------------------------*/ |
2846 | ||
f150fa1a | 2847 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
2848 | |
2849 | struct usb_mon_operations *mon_ops; | |
2850 | ||
2851 | /* | |
2852 | * The registration is unlocked. | |
2853 | * We do it this way because we do not want to lock in hot paths. | |
2854 | * | |
2855 | * Notice that the code is minimally error-proof. Because usbmon needs | |
2856 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. | |
2857 | */ | |
14557359 | 2858 | |
1da177e4 LT |
2859 | int usb_mon_register (struct usb_mon_operations *ops) |
2860 | { | |
2861 | ||
2862 | if (mon_ops) | |
2863 | return -EBUSY; | |
2864 | ||
2865 | mon_ops = ops; | |
2866 | mb(); | |
2867 | return 0; | |
2868 | } | |
2869 | EXPORT_SYMBOL_GPL (usb_mon_register); | |
2870 | ||
2871 | void usb_mon_deregister (void) | |
2872 | { | |
2873 | ||
2874 | if (mon_ops == NULL) { | |
2875 | printk(KERN_ERR "USB: monitor was not registered\n"); | |
2876 | return; | |
2877 | } | |
2878 | mon_ops = NULL; | |
2879 | mb(); | |
2880 | } | |
2881 | EXPORT_SYMBOL_GPL (usb_mon_deregister); | |
2882 | ||
f150fa1a | 2883 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |