Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * (C) Copyright Linus Torvalds 1999 | |
3 | * (C) Copyright Johannes Erdfelt 1999-2001 | |
4 | * (C) Copyright Andreas Gal 1999 | |
5 | * (C) Copyright Gregory P. Smith 1999 | |
6 | * (C) Copyright Deti Fliegl 1999 | |
7 | * (C) Copyright Randy Dunlap 2000 | |
8 | * (C) Copyright David Brownell 2000-2002 | |
9 | * | |
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 | ||
1da177e4 LT |
25 | #include <linux/module.h> |
26 | #include <linux/version.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/completion.h> | |
30 | #include <linux/utsname.h> | |
31 | #include <linux/mm.h> | |
32 | #include <asm/io.h> | |
1da177e4 LT |
33 | #include <linux/device.h> |
34 | #include <linux/dma-mapping.h> | |
4186ecf8 | 35 | #include <linux/mutex.h> |
1da177e4 LT |
36 | #include <asm/irq.h> |
37 | #include <asm/byteorder.h> | |
b3476675 | 38 | #include <asm/unaligned.h> |
64a21d02 | 39 | #include <linux/platform_device.h> |
6b157c9b | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | |
42 | #include <linux/usb.h> | |
27729aad | 43 | #include <linux/usb/hcd.h> |
1da177e4 LT |
44 | |
45 | #include "usb.h" | |
1da177e4 LT |
46 | |
47 | ||
1da177e4 LT |
48 | /*-------------------------------------------------------------------------*/ |
49 | ||
50 | /* | |
51 | * USB Host Controller Driver framework | |
52 | * | |
53 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing | |
54 | * HCD-specific behaviors/bugs. | |
55 | * | |
56 | * This does error checks, tracks devices and urbs, and delegates to a | |
57 | * "hc_driver" only for code (and data) that really needs to know about | |
58 | * hardware differences. That includes root hub registers, i/o queues, | |
59 | * and so on ... but as little else as possible. | |
60 | * | |
61 | * Shared code includes most of the "root hub" code (these are emulated, | |
62 | * though each HC's hardware works differently) and PCI glue, plus request | |
63 | * tracking overhead. The HCD code should only block on spinlocks or on | |
64 | * hardware handshaking; blocking on software events (such as other kernel | |
65 | * threads releasing resources, or completing actions) is all generic. | |
66 | * | |
67 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", | |
68 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used | |
69 | * only by the hub driver ... and that neither should be seen or used by | |
70 | * usb client device drivers. | |
71 | * | |
72 | * Contributors of ideas or unattributed patches include: David Brownell, | |
73 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... | |
74 | * | |
75 | * HISTORY: | |
76 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some | |
77 | * associated cleanup. "usb_hcd" still != "usb_bus". | |
78 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. | |
79 | */ | |
80 | ||
81 | /*-------------------------------------------------------------------------*/ | |
82 | ||
9beeee65 AS |
83 | /* Keep track of which host controller drivers are loaded */ |
84 | unsigned long usb_hcds_loaded; | |
85 | EXPORT_SYMBOL_GPL(usb_hcds_loaded); | |
86 | ||
1da177e4 LT |
87 | /* host controllers we manage */ |
88 | LIST_HEAD (usb_bus_list); | |
89 | EXPORT_SYMBOL_GPL (usb_bus_list); | |
90 | ||
91 | /* used when allocating bus numbers */ | |
92 | #define USB_MAXBUS 64 | |
93 | struct usb_busmap { | |
94 | unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; | |
95 | }; | |
96 | static struct usb_busmap busmap; | |
97 | ||
98 | /* used when updating list of hcds */ | |
4186ecf8 | 99 | DEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ |
1da177e4 LT |
100 | EXPORT_SYMBOL_GPL (usb_bus_list_lock); |
101 | ||
102 | /* used for controlling access to virtual root hubs */ | |
103 | static DEFINE_SPINLOCK(hcd_root_hub_lock); | |
104 | ||
809a58b8 AS |
105 | /* used when updating an endpoint's URB list */ |
106 | static DEFINE_SPINLOCK(hcd_urb_list_lock); | |
1da177e4 | 107 | |
cde217a5 AS |
108 | /* used to protect against unlinking URBs after the device is gone */ |
109 | static DEFINE_SPINLOCK(hcd_urb_unlink_lock); | |
110 | ||
1da177e4 LT |
111 | /* wait queue for synchronous unlinks */ |
112 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); | |
113 | ||
809a58b8 AS |
114 | static inline int is_root_hub(struct usb_device *udev) |
115 | { | |
116 | return (udev->parent == NULL); | |
117 | } | |
118 | ||
1da177e4 LT |
119 | /*-------------------------------------------------------------------------*/ |
120 | ||
121 | /* | |
122 | * Sharable chunks of root hub code. | |
123 | */ | |
124 | ||
125 | /*-------------------------------------------------------------------------*/ | |
126 | ||
127 | #define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) | |
128 | #define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) | |
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 | ||
1da177e4 LT |
151 | /* usb 2.0 root hub device descriptor */ |
152 | static const u8 usb2_rh_dev_descriptor [18] = { | |
153 | 0x12, /* __u8 bLength; */ | |
154 | 0x01, /* __u8 bDescriptorType; Device */ | |
155 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ | |
156 | ||
157 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
158 | 0x00, /* __u8 bDeviceSubClass; */ | |
7329e211 | 159 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
16f16d11 | 160 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 161 | |
bfb8bfad | 162 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
667d691e | 163 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ |
1da177e4 LT |
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 | ||
172 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ | |
173 | ||
174 | /* usb 1.1 root hub device descriptor */ | |
175 | static const u8 usb11_rh_dev_descriptor [18] = { | |
176 | 0x12, /* __u8 bLength; */ | |
177 | 0x01, /* __u8 bDescriptorType; Device */ | |
178 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ | |
179 | ||
180 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
181 | 0x00, /* __u8 bDeviceSubClass; */ | |
182 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ | |
16f16d11 | 183 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 184 | |
bfb8bfad | 185 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ |
667d691e | 186 | 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ |
1da177e4 LT |
187 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
188 | ||
189 | 0x03, /* __u8 iManufacturer; */ | |
190 | 0x02, /* __u8 iProduct; */ | |
191 | 0x01, /* __u8 iSerialNumber; */ | |
192 | 0x01 /* __u8 bNumConfigurations; */ | |
193 | }; | |
194 | ||
195 | ||
196 | /*-------------------------------------------------------------------------*/ | |
197 | ||
198 | /* Configuration descriptors for our root hubs */ | |
199 | ||
200 | static const u8 fs_rh_config_descriptor [] = { | |
201 | ||
202 | /* one configuration */ | |
203 | 0x09, /* __u8 bLength; */ | |
204 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
205 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
206 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
207 | 0x01, /* __u8 bConfigurationValue; */ | |
208 | 0x00, /* __u8 iConfiguration; */ | |
209 | 0xc0, /* __u8 bmAttributes; | |
210 | Bit 7: must be set, | |
211 | 6: Self-powered, | |
212 | 5: Remote wakeup, | |
213 | 4..0: resvd */ | |
214 | 0x00, /* __u8 MaxPower; */ | |
215 | ||
216 | /* USB 1.1: | |
217 | * USB 2.0, single TT organization (mandatory): | |
218 | * one interface, protocol 0 | |
219 | * | |
220 | * USB 2.0, multiple TT organization (optional): | |
221 | * two interfaces, protocols 1 (like single TT) | |
222 | * and 2 (multiple TT mode) ... config is | |
223 | * sometimes settable | |
224 | * NOT IMPLEMENTED | |
225 | */ | |
226 | ||
227 | /* one interface */ | |
228 | 0x09, /* __u8 if_bLength; */ | |
229 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
230 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
231 | 0x00, /* __u8 if_bAlternateSetting; */ | |
232 | 0x01, /* __u8 if_bNumEndpoints; */ | |
233 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
234 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
235 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
236 | 0x00, /* __u8 if_iInterface; */ | |
237 | ||
238 | /* one endpoint (status change endpoint) */ | |
239 | 0x07, /* __u8 ep_bLength; */ | |
240 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
241 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
242 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
243 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ | |
244 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ | |
245 | }; | |
246 | ||
247 | static const u8 hs_rh_config_descriptor [] = { | |
248 | ||
249 | /* one configuration */ | |
250 | 0x09, /* __u8 bLength; */ | |
251 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
252 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
253 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
254 | 0x01, /* __u8 bConfigurationValue; */ | |
255 | 0x00, /* __u8 iConfiguration; */ | |
256 | 0xc0, /* __u8 bmAttributes; | |
257 | Bit 7: must be set, | |
258 | 6: Self-powered, | |
259 | 5: Remote wakeup, | |
260 | 4..0: resvd */ | |
261 | 0x00, /* __u8 MaxPower; */ | |
262 | ||
263 | /* USB 1.1: | |
264 | * USB 2.0, single TT organization (mandatory): | |
265 | * one interface, protocol 0 | |
266 | * | |
267 | * USB 2.0, multiple TT organization (optional): | |
268 | * two interfaces, protocols 1 (like single TT) | |
269 | * and 2 (multiple TT mode) ... config is | |
270 | * sometimes settable | |
271 | * NOT IMPLEMENTED | |
272 | */ | |
273 | ||
274 | /* one interface */ | |
275 | 0x09, /* __u8 if_bLength; */ | |
276 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
277 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
278 | 0x00, /* __u8 if_bAlternateSetting; */ | |
279 | 0x01, /* __u8 if_bNumEndpoints; */ | |
280 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
281 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
282 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
283 | 0x00, /* __u8 if_iInterface; */ | |
284 | ||
285 | /* one endpoint (status change endpoint) */ | |
286 | 0x07, /* __u8 ep_bLength; */ | |
287 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
288 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
289 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
88fafff9 | 290 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
291 | * see hub.c:hub_configure() for details. */ | |
292 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
1da177e4 LT |
293 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
294 | }; | |
295 | ||
d2e9b4d6 SS |
296 | static const u8 ss_rh_config_descriptor[] = { |
297 | /* one configuration */ | |
298 | 0x09, /* __u8 bLength; */ | |
299 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
22c6a35d | 300 | 0x1f, 0x00, /* __le16 wTotalLength; */ |
d2e9b4d6 SS |
301 | 0x01, /* __u8 bNumInterfaces; (1) */ |
302 | 0x01, /* __u8 bConfigurationValue; */ | |
303 | 0x00, /* __u8 iConfiguration; */ | |
304 | 0xc0, /* __u8 bmAttributes; | |
305 | Bit 7: must be set, | |
306 | 6: Self-powered, | |
307 | 5: Remote wakeup, | |
308 | 4..0: resvd */ | |
309 | 0x00, /* __u8 MaxPower; */ | |
310 | ||
311 | /* one interface */ | |
312 | 0x09, /* __u8 if_bLength; */ | |
313 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
314 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
315 | 0x00, /* __u8 if_bAlternateSetting; */ | |
316 | 0x01, /* __u8 if_bNumEndpoints; */ | |
317 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
318 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
319 | 0x00, /* __u8 if_bInterfaceProtocol; */ | |
320 | 0x00, /* __u8 if_iInterface; */ | |
321 | ||
322 | /* one endpoint (status change endpoint) */ | |
323 | 0x07, /* __u8 ep_bLength; */ | |
324 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
325 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
326 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
327 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) | |
328 | * see hub.c:hub_configure() for details. */ | |
329 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
22c6a35d SS |
330 | 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
331 | ||
332 | /* one SuperSpeed endpoint companion descriptor */ | |
333 | 0x06, /* __u8 ss_bLength */ | |
334 | 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ | |
335 | 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ | |
336 | 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ | |
337 | 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ | |
d2e9b4d6 SS |
338 | }; |
339 | ||
c4fc2342 CDH |
340 | /* authorized_default behaviour: |
341 | * -1 is authorized for all devices except wireless (old behaviour) | |
342 | * 0 is unauthorized for all devices | |
343 | * 1 is authorized for all devices | |
344 | */ | |
345 | static int authorized_default = -1; | |
346 | module_param(authorized_default, int, S_IRUGO|S_IWUSR); | |
347 | MODULE_PARM_DESC(authorized_default, | |
348 | "Default USB device authorization: 0 is not authorized, 1 is " | |
349 | "authorized, -1 is authorized except for wireless USB (default, " | |
350 | "old behaviour"); | |
1da177e4 LT |
351 | /*-------------------------------------------------------------------------*/ |
352 | ||
392ca68b GS |
353 | /** |
354 | * ascii2desc() - Helper routine for producing UTF-16LE string descriptors | |
355 | * @s: Null-terminated ASCII (actually ISO-8859-1) string | |
356 | * @buf: Buffer for USB string descriptor (header + UTF-16LE) | |
357 | * @len: Length (in bytes; may be odd) of descriptor buffer. | |
358 | * | |
359 | * The return value is the number of bytes filled in: 2 + 2*strlen(s) or | |
360 | * buflen, whichever is less. | |
361 | * | |
362 | * USB String descriptors can contain at most 126 characters; input | |
363 | * strings longer than that are truncated. | |
1da177e4 | 364 | */ |
392ca68b GS |
365 | static unsigned |
366 | ascii2desc(char const *s, u8 *buf, unsigned len) | |
1da177e4 | 367 | { |
392ca68b GS |
368 | unsigned n, t = 2 + 2*strlen(s); |
369 | ||
370 | if (t > 254) | |
371 | t = 254; /* Longest possible UTF string descriptor */ | |
372 | if (len > t) | |
373 | len = t; | |
374 | ||
375 | t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ | |
376 | ||
377 | n = len; | |
378 | while (n--) { | |
379 | *buf++ = t; | |
380 | if (!n--) | |
381 | break; | |
382 | *buf++ = t >> 8; | |
383 | t = (unsigned char)*s++; | |
1da177e4 | 384 | } |
392ca68b | 385 | return len; |
1da177e4 LT |
386 | } |
387 | ||
392ca68b GS |
388 | /** |
389 | * rh_string() - provides string descriptors for root hub | |
390 | * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) | |
1da177e4 | 391 | * @hcd: the host controller for this root hub |
392ca68b GS |
392 | * @data: buffer for output packet |
393 | * @len: length of the provided buffer | |
1da177e4 LT |
394 | * |
395 | * Produces either a manufacturer, product or serial number string for the | |
396 | * virtual root hub device. | |
392ca68b GS |
397 | * Returns the number of bytes filled in: the length of the descriptor or |
398 | * of the provided buffer, whichever is less. | |
1da177e4 | 399 | */ |
392ca68b GS |
400 | static unsigned |
401 | rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) | |
71d2718f | 402 | { |
392ca68b GS |
403 | char buf[100]; |
404 | char const *s; | |
405 | static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; | |
1da177e4 LT |
406 | |
407 | // language ids | |
392ca68b GS |
408 | switch (id) { |
409 | case 0: | |
410 | /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ | |
411 | /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ | |
412 | if (len > 4) | |
413 | len = 4; | |
414 | memcpy(data, langids, len); | |
1da177e4 | 415 | return len; |
392ca68b GS |
416 | case 1: |
417 | /* Serial number */ | |
418 | s = hcd->self.bus_name; | |
419 | break; | |
420 | case 2: | |
421 | /* Product name */ | |
422 | s = hcd->product_desc; | |
423 | break; | |
424 | case 3: | |
425 | /* Manufacturer */ | |
96b644bd SH |
426 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
427 | init_utsname()->release, hcd->driver->description); | |
392ca68b GS |
428 | s = buf; |
429 | break; | |
1da177e4 | 430 | default: |
392ca68b GS |
431 | /* Can't happen; caller guarantees it */ |
432 | return 0; | |
1da177e4 | 433 | } |
392ca68b GS |
434 | |
435 | return ascii2desc(s, data, len); | |
1da177e4 LT |
436 | } |
437 | ||
438 | ||
439 | /* Root hub control transfers execute synchronously */ | |
440 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) | |
441 | { | |
442 | struct usb_ctrlrequest *cmd; | |
443 | u16 typeReq, wValue, wIndex, wLength; | |
444 | u8 *ubuf = urb->transfer_buffer; | |
48e82361 SS |
445 | /* |
446 | * tbuf should be as big as the BOS descriptor and | |
447 | * the USB hub descriptor. | |
448 | */ | |
449 | u8 tbuf[USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE] | |
54bee6e1 | 450 | __attribute__((aligned(4))); |
1da177e4 | 451 | const u8 *bufp = tbuf; |
71d2718f | 452 | unsigned len = 0; |
e9df41c5 | 453 | int status; |
7329e211 AS |
454 | u8 patch_wakeup = 0; |
455 | u8 patch_protocol = 0; | |
1da177e4 | 456 | |
9439eb94 AS |
457 | might_sleep(); |
458 | ||
e9df41c5 AS |
459 | spin_lock_irq(&hcd_root_hub_lock); |
460 | status = usb_hcd_link_urb_to_ep(hcd, urb); | |
461 | spin_unlock_irq(&hcd_root_hub_lock); | |
462 | if (status) | |
463 | return status; | |
b0d9efba | 464 | urb->hcpriv = hcd; /* Indicate it's queued */ |
e9df41c5 | 465 | |
1da177e4 LT |
466 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; |
467 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; | |
468 | wValue = le16_to_cpu (cmd->wValue); | |
469 | wIndex = le16_to_cpu (cmd->wIndex); | |
470 | wLength = le16_to_cpu (cmd->wLength); | |
471 | ||
472 | if (wLength > urb->transfer_buffer_length) | |
473 | goto error; | |
474 | ||
475 | urb->actual_length = 0; | |
476 | switch (typeReq) { | |
477 | ||
478 | /* DEVICE REQUESTS */ | |
479 | ||
fb669cc0 DB |
480 | /* The root hub's remote wakeup enable bit is implemented using |
481 | * driver model wakeup flags. If this system supports wakeup | |
482 | * through USB, userspace may change the default "allow wakeup" | |
483 | * policy through sysfs or these calls. | |
484 | * | |
485 | * Most root hubs support wakeup from downstream devices, for | |
486 | * runtime power management (disabling USB clocks and reducing | |
487 | * VBUS power usage). However, not all of them do so; silicon, | |
488 | * board, and BIOS bugs here are not uncommon, so these can't | |
489 | * be treated quite like external hubs. | |
490 | * | |
491 | * Likewise, not all root hubs will pass wakeup events upstream, | |
492 | * to wake up the whole system. So don't assume root hub and | |
493 | * controller capabilities are identical. | |
494 | */ | |
495 | ||
1da177e4 | 496 | case DeviceRequest | USB_REQ_GET_STATUS: |
fb669cc0 DB |
497 | tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
498 | << USB_DEVICE_REMOTE_WAKEUP) | |
1da177e4 LT |
499 | | (1 << USB_DEVICE_SELF_POWERED); |
500 | tbuf [1] = 0; | |
501 | len = 2; | |
502 | break; | |
503 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: | |
504 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) | |
fb669cc0 | 505 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
1da177e4 LT |
506 | else |
507 | goto error; | |
508 | break; | |
509 | case DeviceOutRequest | USB_REQ_SET_FEATURE: | |
fb669cc0 DB |
510 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
511 | && wValue == USB_DEVICE_REMOTE_WAKEUP) | |
512 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); | |
1da177e4 LT |
513 | else |
514 | goto error; | |
515 | break; | |
516 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: | |
517 | tbuf [0] = 1; | |
518 | len = 1; | |
519 | /* FALLTHROUGH */ | |
520 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: | |
521 | break; | |
522 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
523 | switch (wValue & 0xff00) { | |
524 | case USB_DT_DEVICE << 8: | |
83de4b2b | 525 | switch (hcd->speed) { |
7dd19e69 | 526 | case HCD_USB3: |
d2e9b4d6 | 527 | bufp = usb3_rh_dev_descriptor; |
7dd19e69 VM |
528 | break; |
529 | case HCD_USB2: | |
1da177e4 | 530 | bufp = usb2_rh_dev_descriptor; |
7dd19e69 VM |
531 | break; |
532 | case HCD_USB11: | |
1da177e4 | 533 | bufp = usb11_rh_dev_descriptor; |
7dd19e69 VM |
534 | break; |
535 | default: | |
1da177e4 | 536 | goto error; |
7dd19e69 | 537 | } |
1da177e4 | 538 | len = 18; |
7329e211 AS |
539 | if (hcd->has_tt) |
540 | patch_protocol = 1; | |
1da177e4 LT |
541 | break; |
542 | case USB_DT_CONFIG << 8: | |
83de4b2b | 543 | switch (hcd->speed) { |
7dd19e69 | 544 | case HCD_USB3: |
d2e9b4d6 SS |
545 | bufp = ss_rh_config_descriptor; |
546 | len = sizeof ss_rh_config_descriptor; | |
7dd19e69 VM |
547 | break; |
548 | case HCD_USB2: | |
1da177e4 LT |
549 | bufp = hs_rh_config_descriptor; |
550 | len = sizeof hs_rh_config_descriptor; | |
7dd19e69 VM |
551 | break; |
552 | case HCD_USB11: | |
1da177e4 LT |
553 | bufp = fs_rh_config_descriptor; |
554 | len = sizeof fs_rh_config_descriptor; | |
7dd19e69 VM |
555 | break; |
556 | default: | |
557 | goto error; | |
1da177e4 | 558 | } |
fb669cc0 | 559 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
560 | patch_wakeup = 1; |
561 | break; | |
562 | case USB_DT_STRING << 8: | |
71d2718f RK |
563 | if ((wValue & 0xff) < 4) |
564 | urb->actual_length = rh_string(wValue & 0xff, | |
565 | hcd, ubuf, wLength); | |
566 | else /* unsupported IDs --> "protocol stall" */ | |
1da177e4 | 567 | goto error; |
1da177e4 | 568 | break; |
48e82361 SS |
569 | case USB_DT_BOS << 8: |
570 | goto nongeneric; | |
1da177e4 LT |
571 | default: |
572 | goto error; | |
573 | } | |
574 | break; | |
575 | case DeviceRequest | USB_REQ_GET_INTERFACE: | |
576 | tbuf [0] = 0; | |
577 | len = 1; | |
578 | /* FALLTHROUGH */ | |
579 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: | |
580 | break; | |
581 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: | |
582 | // wValue == urb->dev->devaddr | |
583 | dev_dbg (hcd->self.controller, "root hub device address %d\n", | |
584 | wValue); | |
585 | break; | |
586 | ||
587 | /* INTERFACE REQUESTS (no defined feature/status flags) */ | |
588 | ||
589 | /* ENDPOINT REQUESTS */ | |
590 | ||
591 | case EndpointRequest | USB_REQ_GET_STATUS: | |
592 | // ENDPOINT_HALT flag | |
593 | tbuf [0] = 0; | |
594 | tbuf [1] = 0; | |
595 | len = 2; | |
596 | /* FALLTHROUGH */ | |
597 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: | |
598 | case EndpointOutRequest | USB_REQ_SET_FEATURE: | |
599 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); | |
600 | break; | |
601 | ||
602 | /* CLASS REQUESTS (and errors) */ | |
603 | ||
604 | default: | |
48e82361 | 605 | nongeneric: |
1da177e4 | 606 | /* non-generic request */ |
b13296c6 DB |
607 | switch (typeReq) { |
608 | case GetHubStatus: | |
609 | case GetPortStatus: | |
610 | len = 4; | |
611 | break; | |
612 | case GetHubDescriptor: | |
613 | len = sizeof (struct usb_hub_descriptor); | |
614 | break; | |
48e82361 SS |
615 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
616 | /* len is returned by hub_control */ | |
617 | break; | |
1da177e4 | 618 | } |
b13296c6 DB |
619 | status = hcd->driver->hub_control (hcd, |
620 | typeReq, wValue, wIndex, | |
621 | tbuf, wLength); | |
1da177e4 LT |
622 | break; |
623 | error: | |
624 | /* "protocol stall" on error */ | |
625 | status = -EPIPE; | |
626 | } | |
627 | ||
48e82361 | 628 | if (status < 0) { |
1da177e4 LT |
629 | len = 0; |
630 | if (status != -EPIPE) { | |
631 | dev_dbg (hcd->self.controller, | |
632 | "CTRL: TypeReq=0x%x val=0x%x " | |
633 | "idx=0x%x len=%d ==> %d\n", | |
634 | typeReq, wValue, wIndex, | |
b13296c6 | 635 | wLength, status); |
1da177e4 | 636 | } |
48e82361 SS |
637 | } else if (status > 0) { |
638 | /* hub_control may return the length of data copied. */ | |
639 | len = status; | |
640 | status = 0; | |
1da177e4 LT |
641 | } |
642 | if (len) { | |
643 | if (urb->transfer_buffer_length < len) | |
644 | len = urb->transfer_buffer_length; | |
645 | urb->actual_length = len; | |
646 | // always USB_DIR_IN, toward host | |
647 | memcpy (ubuf, bufp, len); | |
648 | ||
649 | /* report whether RH hardware supports remote wakeup */ | |
650 | if (patch_wakeup && | |
651 | len > offsetof (struct usb_config_descriptor, | |
652 | bmAttributes)) | |
653 | ((struct usb_config_descriptor *)ubuf)->bmAttributes | |
654 | |= USB_CONFIG_ATT_WAKEUP; | |
7329e211 AS |
655 | |
656 | /* report whether RH hardware has an integrated TT */ | |
657 | if (patch_protocol && | |
658 | len > offsetof(struct usb_device_descriptor, | |
659 | bDeviceProtocol)) | |
660 | ((struct usb_device_descriptor *) ubuf)-> | |
7bf01185 | 661 | bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT; |
1da177e4 LT |
662 | } |
663 | ||
664 | /* any errors get returned through the urb completion */ | |
9439eb94 | 665 | spin_lock_irq(&hcd_root_hub_lock); |
e9df41c5 | 666 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
9439eb94 AS |
667 | |
668 | /* This peculiar use of spinlocks echoes what real HC drivers do. | |
669 | * Avoiding calls to local_irq_disable/enable makes the code | |
670 | * RT-friendly. | |
671 | */ | |
672 | spin_unlock(&hcd_root_hub_lock); | |
4a00027d | 673 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 AS |
674 | spin_lock(&hcd_root_hub_lock); |
675 | ||
676 | spin_unlock_irq(&hcd_root_hub_lock); | |
1da177e4 LT |
677 | return 0; |
678 | } | |
679 | ||
680 | /*-------------------------------------------------------------------------*/ | |
681 | ||
682 | /* | |
d5926ae7 AS |
683 | * Root Hub interrupt transfers are polled using a timer if the |
684 | * driver requests it; otherwise the driver is responsible for | |
685 | * calling usb_hcd_poll_rh_status() when an event occurs. | |
1da177e4 | 686 | * |
d5926ae7 AS |
687 | * Completions are called in_interrupt(), but they may or may not |
688 | * be in_irq(). | |
1da177e4 | 689 | */ |
d5926ae7 AS |
690 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
691 | { | |
692 | struct urb *urb; | |
693 | int length; | |
694 | unsigned long flags; | |
ad361c98 | 695 | char buffer[6]; /* Any root hubs with > 31 ports? */ |
1da177e4 | 696 | |
6d88e679 | 697 | if (unlikely(!hcd->rh_pollable)) |
1b42ae6d | 698 | return; |
d5926ae7 AS |
699 | if (!hcd->uses_new_polling && !hcd->status_urb) |
700 | return; | |
1da177e4 | 701 | |
d5926ae7 AS |
702 | length = hcd->driver->hub_status_data(hcd, buffer); |
703 | if (length > 0) { | |
1da177e4 | 704 | |
d5926ae7 | 705 | /* try to complete the status urb */ |
9439eb94 | 706 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
d5926ae7 AS |
707 | urb = hcd->status_urb; |
708 | if (urb) { | |
541c7d43 | 709 | clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 710 | hcd->status_urb = NULL; |
e9df41c5 AS |
711 | urb->actual_length = length; |
712 | memcpy(urb->transfer_buffer, buffer, length); | |
9439eb94 | 713 | |
e9df41c5 | 714 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
9439eb94 | 715 | spin_unlock(&hcd_root_hub_lock); |
4a00027d | 716 | usb_hcd_giveback_urb(hcd, urb, 0); |
9439eb94 | 717 | spin_lock(&hcd_root_hub_lock); |
e9df41c5 | 718 | } else { |
d5926ae7 | 719 | length = 0; |
541c7d43 | 720 | set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 721 | } |
9439eb94 | 722 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
1da177e4 LT |
723 | } |
724 | ||
d5926ae7 | 725 | /* The USB 2.0 spec says 256 ms. This is close enough and won't |
01cd0819 AV |
726 | * exceed that limit if HZ is 100. The math is more clunky than |
727 | * maybe expected, this is to make sure that all timers for USB devices | |
25985edc | 728 | * fire at the same time to give the CPU a break in between */ |
541c7d43 | 729 | if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : |
d5926ae7 | 730 | (length == 0 && hcd->status_urb != NULL)) |
01cd0819 | 731 | mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
1da177e4 | 732 | } |
d5926ae7 | 733 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
1da177e4 LT |
734 | |
735 | /* timer callback */ | |
d5926ae7 AS |
736 | static void rh_timer_func (unsigned long _hcd) |
737 | { | |
738 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); | |
739 | } | |
740 | ||
741 | /*-------------------------------------------------------------------------*/ | |
1da177e4 | 742 | |
d5926ae7 | 743 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
1da177e4 | 744 | { |
d5926ae7 | 745 | int retval; |
1da177e4 | 746 | unsigned long flags; |
71d2718f | 747 | unsigned len = 1 + (urb->dev->maxchild / 8); |
1da177e4 | 748 | |
d5926ae7 | 749 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
e9df41c5 | 750 | if (hcd->status_urb || urb->transfer_buffer_length < len) { |
d5926ae7 AS |
751 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); |
752 | retval = -EINVAL; | |
e9df41c5 AS |
753 | goto done; |
754 | } | |
1da177e4 | 755 | |
e9df41c5 AS |
756 | retval = usb_hcd_link_urb_to_ep(hcd, urb); |
757 | if (retval) | |
758 | goto done; | |
1da177e4 | 759 | |
e9df41c5 AS |
760 | hcd->status_urb = urb; |
761 | urb->hcpriv = hcd; /* indicate it's queued */ | |
762 | if (!hcd->uses_new_polling) | |
763 | mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); | |
764 | ||
765 | /* If a status change has already occurred, report it ASAP */ | |
541c7d43 | 766 | else if (HCD_POLL_PENDING(hcd)) |
e9df41c5 AS |
767 | mod_timer(&hcd->rh_timer, jiffies); |
768 | retval = 0; | |
769 | done: | |
d5926ae7 AS |
770 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
771 | return retval; | |
1da177e4 LT |
772 | } |
773 | ||
1da177e4 LT |
774 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
775 | { | |
5e60a161 | 776 | if (usb_endpoint_xfer_int(&urb->ep->desc)) |
d5926ae7 | 777 | return rh_queue_status (hcd, urb); |
5e60a161 | 778 | if (usb_endpoint_xfer_control(&urb->ep->desc)) |
1da177e4 | 779 | return rh_call_control (hcd, urb); |
d5926ae7 | 780 | return -EINVAL; |
1da177e4 LT |
781 | } |
782 | ||
783 | /*-------------------------------------------------------------------------*/ | |
784 | ||
455b25fb AS |
785 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
786 | * since these URBs always execute synchronously. | |
d5926ae7 | 787 | */ |
e9df41c5 | 788 | static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 789 | { |
455b25fb | 790 | unsigned long flags; |
e9df41c5 | 791 | int rc; |
1da177e4 | 792 | |
9439eb94 | 793 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
e9df41c5 AS |
794 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
795 | if (rc) | |
796 | goto done; | |
797 | ||
5e60a161 | 798 | if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ |
455b25fb | 799 | ; /* Do nothing */ |
d5926ae7 AS |
800 | |
801 | } else { /* Status URB */ | |
802 | if (!hcd->uses_new_polling) | |
455b25fb | 803 | del_timer (&hcd->rh_timer); |
d5926ae7 AS |
804 | if (urb == hcd->status_urb) { |
805 | hcd->status_urb = NULL; | |
e9df41c5 | 806 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
1da177e4 | 807 | |
9439eb94 | 808 | spin_unlock(&hcd_root_hub_lock); |
4a00027d | 809 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 AS |
810 | spin_lock(&hcd_root_hub_lock); |
811 | } | |
812 | } | |
e9df41c5 | 813 | done: |
9439eb94 | 814 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
e9df41c5 | 815 | return rc; |
1da177e4 LT |
816 | } |
817 | ||
5234ce1b IPG |
818 | |
819 | ||
820 | /* | |
821 | * Show & store the current value of authorized_default | |
822 | */ | |
823 | static ssize_t usb_host_authorized_default_show(struct device *dev, | |
824 | struct device_attribute *attr, | |
825 | char *buf) | |
826 | { | |
827 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
828 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
829 | struct usb_hcd *usb_hcd; | |
830 | ||
831 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ | |
832 | return -ENODEV; | |
833 | usb_hcd = bus_to_hcd(usb_bus); | |
834 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); | |
835 | } | |
836 | ||
837 | static ssize_t usb_host_authorized_default_store(struct device *dev, | |
838 | struct device_attribute *attr, | |
839 | const char *buf, size_t size) | |
840 | { | |
841 | ssize_t result; | |
842 | unsigned val; | |
843 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
844 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
845 | struct usb_hcd *usb_hcd; | |
846 | ||
847 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ | |
848 | return -ENODEV; | |
849 | usb_hcd = bus_to_hcd(usb_bus); | |
850 | result = sscanf(buf, "%u\n", &val); | |
851 | if (result == 1) { | |
852 | usb_hcd->authorized_default = val? 1 : 0; | |
853 | result = size; | |
854 | } | |
855 | else | |
856 | result = -EINVAL; | |
857 | return result; | |
858 | } | |
859 | ||
860 | static DEVICE_ATTR(authorized_default, 0644, | |
861 | usb_host_authorized_default_show, | |
862 | usb_host_authorized_default_store); | |
863 | ||
864 | ||
865 | /* Group all the USB bus attributes */ | |
866 | static struct attribute *usb_bus_attrs[] = { | |
867 | &dev_attr_authorized_default.attr, | |
868 | NULL, | |
869 | }; | |
870 | ||
871 | static struct attribute_group usb_bus_attr_group = { | |
872 | .name = NULL, /* we want them in the same directory */ | |
873 | .attrs = usb_bus_attrs, | |
874 | }; | |
875 | ||
876 | ||
877 | ||
1da177e4 LT |
878 | /*-------------------------------------------------------------------------*/ |
879 | ||
1da177e4 LT |
880 | /** |
881 | * usb_bus_init - shared initialization code | |
882 | * @bus: the bus structure being initialized | |
883 | * | |
884 | * This code is used to initialize a usb_bus structure, memory for which is | |
885 | * separately managed. | |
886 | */ | |
887 | static void usb_bus_init (struct usb_bus *bus) | |
888 | { | |
889 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); | |
890 | ||
891 | bus->devnum_next = 1; | |
892 | ||
893 | bus->root_hub = NULL; | |
1da177e4 LT |
894 | bus->busnum = -1; |
895 | bus->bandwidth_allocated = 0; | |
896 | bus->bandwidth_int_reqs = 0; | |
897 | bus->bandwidth_isoc_reqs = 0; | |
898 | ||
899 | INIT_LIST_HEAD (&bus->bus_list); | |
1da177e4 LT |
900 | } |
901 | ||
1da177e4 LT |
902 | /*-------------------------------------------------------------------------*/ |
903 | ||
904 | /** | |
905 | * usb_register_bus - registers the USB host controller with the usb core | |
906 | * @bus: pointer to the bus to register | |
907 | * Context: !in_interrupt() | |
908 | * | |
909 | * Assigns a bus number, and links the controller into usbcore data | |
910 | * structures so that it can be seen by scanning the bus list. | |
911 | */ | |
912 | static int usb_register_bus(struct usb_bus *bus) | |
913 | { | |
eb579f58 | 914 | int result = -E2BIG; |
1da177e4 | 915 | int busnum; |
1da177e4 | 916 | |
4186ecf8 | 917 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 918 | busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); |
eb579f58 | 919 | if (busnum >= USB_MAXBUS) { |
1da177e4 | 920 | printk (KERN_ERR "%s: too many buses\n", usbcore_name); |
eb579f58 | 921 | goto error_find_busnum; |
1da177e4 | 922 | } |
eb579f58 IPG |
923 | set_bit (busnum, busmap.busmap); |
924 | bus->busnum = busnum; | |
5a3201b2 | 925 | |
1da177e4 LT |
926 | /* Add it to the local list of buses */ |
927 | list_add (&bus->bus_list, &usb_bus_list); | |
4186ecf8 | 928 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 929 | |
3099e75a | 930 | usb_notify_add_bus(bus); |
1da177e4 | 931 | |
eb579f58 IPG |
932 | dev_info (bus->controller, "new USB bus registered, assigned bus " |
933 | "number %d\n", bus->busnum); | |
1da177e4 | 934 | return 0; |
eb579f58 | 935 | |
eb579f58 IPG |
936 | error_find_busnum: |
937 | mutex_unlock(&usb_bus_list_lock); | |
938 | return result; | |
1da177e4 LT |
939 | } |
940 | ||
941 | /** | |
942 | * usb_deregister_bus - deregisters the USB host controller | |
943 | * @bus: pointer to the bus to deregister | |
944 | * Context: !in_interrupt() | |
945 | * | |
946 | * Recycles the bus number, and unlinks the controller from usbcore data | |
947 | * structures so that it won't be seen by scanning the bus list. | |
948 | */ | |
949 | static void usb_deregister_bus (struct usb_bus *bus) | |
950 | { | |
951 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); | |
952 | ||
953 | /* | |
954 | * NOTE: make sure that all the devices are removed by the | |
955 | * controller code, as well as having it call this when cleaning | |
956 | * itself up | |
957 | */ | |
4186ecf8 | 958 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 959 | list_del (&bus->bus_list); |
4186ecf8 | 960 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 961 | |
3099e75a | 962 | usb_notify_remove_bus(bus); |
1da177e4 LT |
963 | |
964 | clear_bit (bus->busnum, busmap.busmap); | |
1da177e4 LT |
965 | } |
966 | ||
967 | /** | |
8ec8d20b | 968 | * register_root_hub - called by usb_add_hcd() to register a root hub |
1da177e4 LT |
969 | * @hcd: host controller for this root hub |
970 | * | |
8ec8d20b | 971 | * This function registers the root hub with the USB subsystem. It sets up |
b1e8f0a6 DB |
972 | * the device properly in the device tree and then calls usb_new_device() |
973 | * to register the usb device. It also assigns the root hub's USB address | |
974 | * (always 1). | |
1da177e4 | 975 | */ |
b1e8f0a6 | 976 | static int register_root_hub(struct usb_hcd *hcd) |
1da177e4 LT |
977 | { |
978 | struct device *parent_dev = hcd->self.controller; | |
b1e8f0a6 | 979 | struct usb_device *usb_dev = hcd->self.root_hub; |
1da177e4 LT |
980 | const int devnum = 1; |
981 | int retval; | |
982 | ||
1da177e4 LT |
983 | usb_dev->devnum = devnum; |
984 | usb_dev->bus->devnum_next = devnum + 1; | |
985 | memset (&usb_dev->bus->devmap.devicemap, 0, | |
986 | sizeof usb_dev->bus->devmap.devicemap); | |
987 | set_bit (devnum, usb_dev->bus->devmap.devicemap); | |
988 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); | |
989 | ||
4186ecf8 | 990 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 991 | |
551509d2 | 992 | usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); |
1da177e4 LT |
993 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); |
994 | if (retval != sizeof usb_dev->descriptor) { | |
4186ecf8 | 995 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 996 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
7071a3ce | 997 | dev_name(&usb_dev->dev), retval); |
1da177e4 LT |
998 | return (retval < 0) ? retval : -EMSGSIZE; |
999 | } | |
448b6eb1 SS |
1000 | if (usb_dev->speed == USB_SPEED_SUPER) { |
1001 | retval = usb_get_bos_descriptor(usb_dev); | |
1002 | if (retval < 0) { | |
1003 | mutex_unlock(&usb_bus_list_lock); | |
1004 | dev_dbg(parent_dev, "can't read %s bos descriptor %d\n", | |
1005 | dev_name(&usb_dev->dev), retval); | |
1006 | return retval; | |
1007 | } | |
1008 | } | |
1da177e4 | 1009 | |
1da177e4 | 1010 | retval = usb_new_device (usb_dev); |
1da177e4 | 1011 | if (retval) { |
1da177e4 | 1012 | dev_err (parent_dev, "can't register root hub for %s, %d\n", |
7071a3ce | 1013 | dev_name(&usb_dev->dev), retval); |
1da177e4 | 1014 | } |
4186ecf8 | 1015 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
1016 | |
1017 | if (retval == 0) { | |
1018 | spin_lock_irq (&hcd_root_hub_lock); | |
1019 | hcd->rh_registered = 1; | |
1020 | spin_unlock_irq (&hcd_root_hub_lock); | |
1021 | ||
1022 | /* Did the HC die before the root hub was registered? */ | |
69fff59d | 1023 | if (HCD_DEAD(hcd)) |
1da177e4 LT |
1024 | usb_hc_died (hcd); /* This time clean up */ |
1025 | } | |
1026 | ||
1027 | return retval; | |
1028 | } | |
1da177e4 LT |
1029 | |
1030 | ||
1031 | /*-------------------------------------------------------------------------*/ | |
1032 | ||
1033 | /** | |
1034 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds | |
1035 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} | |
1036 | * @is_input: true iff the transaction sends data to the host | |
1037 | * @isoc: true for isochronous transactions, false for interrupt ones | |
1038 | * @bytecount: how many bytes in the transaction. | |
1039 | * | |
1040 | * Returns approximate bus time in nanoseconds for a periodic transaction. | |
1041 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be | |
1042 | * scheduled in software, this function is only used for such scheduling. | |
1043 | */ | |
1044 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) | |
1045 | { | |
1046 | unsigned long tmp; | |
1047 | ||
1048 | switch (speed) { | |
1049 | case USB_SPEED_LOW: /* INTR only */ | |
1050 | if (is_input) { | |
1051 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1052 | return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); | |
1053 | } else { | |
1054 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1055 | return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); | |
1056 | } | |
1057 | case USB_SPEED_FULL: /* ISOC or INTR */ | |
1058 | if (isoc) { | |
1059 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1060 | return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); | |
1061 | } else { | |
1062 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1063 | return (9107L + BW_HOST_DELAY + tmp); | |
1064 | } | |
1065 | case USB_SPEED_HIGH: /* ISOC or INTR */ | |
1066 | // FIXME adjust for input vs output | |
1067 | if (isoc) | |
498f78e6 | 1068 | tmp = HS_NSECS_ISO (bytecount); |
1da177e4 | 1069 | else |
498f78e6 | 1070 | tmp = HS_NSECS (bytecount); |
1da177e4 LT |
1071 | return tmp; |
1072 | default: | |
1073 | pr_debug ("%s: bogus device speed!\n", usbcore_name); | |
1074 | return -1; | |
1075 | } | |
1076 | } | |
782e70c6 | 1077 | EXPORT_SYMBOL_GPL(usb_calc_bus_time); |
1da177e4 | 1078 | |
1da177e4 LT |
1079 | |
1080 | /*-------------------------------------------------------------------------*/ | |
1081 | ||
1082 | /* | |
1083 | * Generic HC operations. | |
1084 | */ | |
1085 | ||
1086 | /*-------------------------------------------------------------------------*/ | |
1087 | ||
e9df41c5 AS |
1088 | /** |
1089 | * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue | |
1090 | * @hcd: host controller to which @urb was submitted | |
1091 | * @urb: URB being submitted | |
1092 | * | |
1093 | * Host controller drivers should call this routine in their enqueue() | |
1094 | * method. The HCD's private spinlock must be held and interrupts must | |
1095 | * be disabled. The actions carried out here are required for URB | |
1096 | * submission, as well as for endpoint shutdown and for usb_kill_urb. | |
1097 | * | |
1098 | * Returns 0 for no error, otherwise a negative error code (in which case | |
1099 | * the enqueue() method must fail). If no error occurs but enqueue() fails | |
1100 | * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing | |
1101 | * the private spinlock and returning. | |
1102 | */ | |
1103 | int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) | |
1da177e4 | 1104 | { |
9a9bf406 | 1105 | int rc = 0; |
1da177e4 | 1106 | |
e9df41c5 | 1107 | spin_lock(&hcd_urb_list_lock); |
1da177e4 | 1108 | |
9a9bf406 | 1109 | /* Check that the URB isn't being killed */ |
49367d8f | 1110 | if (unlikely(atomic_read(&urb->reject))) { |
9a9bf406 AS |
1111 | rc = -EPERM; |
1112 | goto done; | |
9f6a93f7 | 1113 | } |
1da177e4 | 1114 | |
9a9bf406 AS |
1115 | if (unlikely(!urb->ep->enabled)) { |
1116 | rc = -ENOENT; | |
1117 | goto done; | |
1118 | } | |
1da177e4 | 1119 | |
6840d255 AS |
1120 | if (unlikely(!urb->dev->can_submit)) { |
1121 | rc = -EHOSTUNREACH; | |
1122 | goto done; | |
1123 | } | |
1124 | ||
1da177e4 | 1125 | /* |
9a9bf406 AS |
1126 | * Check the host controller's state and add the URB to the |
1127 | * endpoint's queue. | |
1da177e4 | 1128 | */ |
9b37596a | 1129 | if (HCD_RH_RUNNING(hcd)) { |
eb231054 | 1130 | urb->unlinked = 0; |
9a9bf406 | 1131 | list_add_tail(&urb->urb_list, &urb->ep->urb_list); |
9b37596a | 1132 | } else { |
9a9bf406 AS |
1133 | rc = -ESHUTDOWN; |
1134 | goto done; | |
1da177e4 | 1135 | } |
9a9bf406 | 1136 | done: |
e9df41c5 | 1137 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 AS |
1138 | return rc; |
1139 | } | |
e9df41c5 | 1140 | EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); |
9a9bf406 | 1141 | |
e9df41c5 AS |
1142 | /** |
1143 | * usb_hcd_check_unlink_urb - check whether an URB may be unlinked | |
1144 | * @hcd: host controller to which @urb was submitted | |
1145 | * @urb: URB being checked for unlinkability | |
1146 | * @status: error code to store in @urb if the unlink succeeds | |
1147 | * | |
1148 | * Host controller drivers should call this routine in their dequeue() | |
1149 | * method. The HCD's private spinlock must be held and interrupts must | |
1150 | * be disabled. The actions carried out here are required for making | |
1151 | * sure than an unlink is valid. | |
1152 | * | |
1153 | * Returns 0 for no error, otherwise a negative error code (in which case | |
1154 | * the dequeue() method must fail). The possible error codes are: | |
1155 | * | |
1156 | * -EIDRM: @urb was not submitted or has already completed. | |
1157 | * The completion function may not have been called yet. | |
1158 | * | |
1159 | * -EBUSY: @urb has already been unlinked. | |
1160 | */ | |
1161 | int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
9a9bf406 AS |
1162 | int status) |
1163 | { | |
9a9bf406 | 1164 | struct list_head *tmp; |
9a9bf406 AS |
1165 | |
1166 | /* insist the urb is still queued */ | |
1167 | list_for_each(tmp, &urb->ep->urb_list) { | |
1168 | if (tmp == &urb->urb_list) | |
1169 | break; | |
1170 | } | |
e9df41c5 AS |
1171 | if (tmp != &urb->urb_list) |
1172 | return -EIDRM; | |
1da177e4 | 1173 | |
9a9bf406 AS |
1174 | /* Any status except -EINPROGRESS means something already started to |
1175 | * unlink this URB from the hardware. So there's no more work to do. | |
1da177e4 | 1176 | */ |
eb231054 | 1177 | if (urb->unlinked) |
e9df41c5 | 1178 | return -EBUSY; |
eb231054 | 1179 | urb->unlinked = status; |
e9df41c5 | 1180 | return 0; |
9a9bf406 | 1181 | } |
e9df41c5 | 1182 | EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); |
9a9bf406 | 1183 | |
e9df41c5 AS |
1184 | /** |
1185 | * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue | |
1186 | * @hcd: host controller to which @urb was submitted | |
1187 | * @urb: URB being unlinked | |
1188 | * | |
1189 | * Host controller drivers should call this routine before calling | |
1190 | * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and | |
1191 | * interrupts must be disabled. The actions carried out here are required | |
1192 | * for URB completion. | |
1193 | */ | |
1194 | void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) | |
9a9bf406 | 1195 | { |
9a9bf406 | 1196 | /* clear all state linking urb to this dev (and hcd) */ |
e9df41c5 | 1197 | spin_lock(&hcd_urb_list_lock); |
9a9bf406 | 1198 | list_del_init(&urb->urb_list); |
e9df41c5 | 1199 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 | 1200 | } |
e9df41c5 | 1201 | EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); |
9a9bf406 | 1202 | |
b3476675 MD |
1203 | /* |
1204 | * Some usb host controllers can only perform dma using a small SRAM area. | |
1205 | * The usb core itself is however optimized for host controllers that can dma | |
1206 | * using regular system memory - like pci devices doing bus mastering. | |
1207 | * | |
1208 | * To support host controllers with limited dma capabilites we provide dma | |
1209 | * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. | |
1210 | * For this to work properly the host controller code must first use the | |
1211 | * function dma_declare_coherent_memory() to point out which memory area | |
1212 | * that should be used for dma allocations. | |
1213 | * | |
1214 | * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for | |
1215 | * dma using dma_alloc_coherent() which in turn allocates from the memory | |
1216 | * area pointed out with dma_declare_coherent_memory(). | |
1217 | * | |
1218 | * So, to summarize... | |
1219 | * | |
1220 | * - We need "local" memory, canonical example being | |
1221 | * a small SRAM on a discrete controller being the | |
1222 | * only memory that the controller can read ... | |
1223 | * (a) "normal" kernel memory is no good, and | |
1224 | * (b) there's not enough to share | |
1225 | * | |
1226 | * - The only *portable* hook for such stuff in the | |
1227 | * DMA framework is dma_declare_coherent_memory() | |
1228 | * | |
1229 | * - So we use that, even though the primary requirement | |
1230 | * is that the memory be "local" (hence addressible | |
1231 | * by that device), not "coherent". | |
1232 | * | |
1233 | */ | |
1234 | ||
1235 | static int hcd_alloc_coherent(struct usb_bus *bus, | |
1236 | gfp_t mem_flags, dma_addr_t *dma_handle, | |
1237 | void **vaddr_handle, size_t size, | |
1238 | enum dma_data_direction dir) | |
1239 | { | |
1240 | unsigned char *vaddr; | |
1241 | ||
4307a28e AR |
1242 | if (*vaddr_handle == NULL) { |
1243 | WARN_ON_ONCE(1); | |
1244 | return -EFAULT; | |
1245 | } | |
1246 | ||
b3476675 MD |
1247 | vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), |
1248 | mem_flags, dma_handle); | |
1249 | if (!vaddr) | |
1250 | return -ENOMEM; | |
1251 | ||
1252 | /* | |
1253 | * Store the virtual address of the buffer at the end | |
1254 | * of the allocated dma buffer. The size of the buffer | |
1255 | * may be uneven so use unaligned functions instead | |
1256 | * of just rounding up. It makes sense to optimize for | |
1257 | * memory footprint over access speed since the amount | |
1258 | * of memory available for dma may be limited. | |
1259 | */ | |
1260 | put_unaligned((unsigned long)*vaddr_handle, | |
1261 | (unsigned long *)(vaddr + size)); | |
1262 | ||
1263 | if (dir == DMA_TO_DEVICE) | |
1264 | memcpy(vaddr, *vaddr_handle, size); | |
1265 | ||
1266 | *vaddr_handle = vaddr; | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, | |
1271 | void **vaddr_handle, size_t size, | |
1272 | enum dma_data_direction dir) | |
1273 | { | |
1274 | unsigned char *vaddr = *vaddr_handle; | |
1275 | ||
1276 | vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); | |
1277 | ||
1278 | if (dir == DMA_FROM_DEVICE) | |
1279 | memcpy(vaddr, *vaddr_handle, size); | |
1280 | ||
1281 | hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); | |
1282 | ||
1283 | *vaddr_handle = vaddr; | |
1284 | *dma_handle = 0; | |
1285 | } | |
1286 | ||
c8cf203a | 1287 | void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) |
ff9c895f | 1288 | { |
ff9c895f AS |
1289 | if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) |
1290 | dma_unmap_single(hcd->self.controller, | |
1291 | urb->setup_dma, | |
1292 | sizeof(struct usb_ctrlrequest), | |
1293 | DMA_TO_DEVICE); | |
1294 | else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) | |
1295 | hcd_free_coherent(urb->dev->bus, | |
1296 | &urb->setup_dma, | |
1297 | (void **) &urb->setup_packet, | |
1298 | sizeof(struct usb_ctrlrequest), | |
1299 | DMA_TO_DEVICE); | |
1300 | ||
1dae423d MF |
1301 | /* Make it safe to call this routine more than once */ |
1302 | urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); | |
1303 | } | |
c8cf203a | 1304 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); |
1dae423d | 1305 | |
2694a48d RM |
1306 | static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1307 | { | |
1308 | if (hcd->driver->unmap_urb_for_dma) | |
1309 | hcd->driver->unmap_urb_for_dma(hcd, urb); | |
1310 | else | |
1311 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
1312 | } | |
1313 | ||
c8cf203a | 1314 | void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1dae423d MF |
1315 | { |
1316 | enum dma_data_direction dir; | |
1317 | ||
c8cf203a | 1318 | usb_hcd_unmap_urb_setup_for_dma(hcd, urb); |
1dae423d | 1319 | |
ff9c895f AS |
1320 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
1321 | if (urb->transfer_flags & URB_DMA_MAP_SG) | |
1322 | dma_unmap_sg(hcd->self.controller, | |
910f8d0c | 1323 | urb->sg, |
ff9c895f AS |
1324 | urb->num_sgs, |
1325 | dir); | |
1326 | else if (urb->transfer_flags & URB_DMA_MAP_PAGE) | |
1327 | dma_unmap_page(hcd->self.controller, | |
1328 | urb->transfer_dma, | |
1329 | urb->transfer_buffer_length, | |
1330 | dir); | |
1331 | else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) | |
1332 | dma_unmap_single(hcd->self.controller, | |
1333 | urb->transfer_dma, | |
1334 | urb->transfer_buffer_length, | |
1335 | dir); | |
1336 | else if (urb->transfer_flags & URB_MAP_LOCAL) | |
1337 | hcd_free_coherent(urb->dev->bus, | |
1338 | &urb->transfer_dma, | |
1339 | &urb->transfer_buffer, | |
1340 | urb->transfer_buffer_length, | |
1341 | dir); | |
1342 | ||
1343 | /* Make it safe to call this routine more than once */ | |
1dae423d | 1344 | urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | |
ff9c895f AS |
1345 | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); |
1346 | } | |
c8cf203a | 1347 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); |
ff9c895f | 1348 | |
b3476675 MD |
1349 | static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
1350 | gfp_t mem_flags) | |
2694a48d RM |
1351 | { |
1352 | if (hcd->driver->map_urb_for_dma) | |
1353 | return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); | |
1354 | else | |
1355 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); | |
1356 | } | |
1357 | ||
1358 | int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, | |
1359 | gfp_t mem_flags) | |
9a9bf406 | 1360 | { |
b3476675 MD |
1361 | enum dma_data_direction dir; |
1362 | int ret = 0; | |
1363 | ||
9a9bf406 AS |
1364 | /* Map the URB's buffers for DMA access. |
1365 | * Lower level HCD code should use *_dma exclusively, | |
e04748e3 SS |
1366 | * unless it uses pio or talks to another transport, |
1367 | * or uses the provided scatter gather list for bulk. | |
1da177e4 | 1368 | */ |
b3476675 | 1369 | |
85bcb5ee | 1370 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
07a8cdd2 AG |
1371 | if (hcd->self.uses_pio_for_control) |
1372 | return ret; | |
85e034fd | 1373 | if (hcd->self.uses_dma) { |
b3476675 | 1374 | urb->setup_dma = dma_map_single( |
1da177e4 LT |
1375 | hcd->self.controller, |
1376 | urb->setup_packet, | |
b3476675 | 1377 | sizeof(struct usb_ctrlrequest), |
1da177e4 | 1378 | DMA_TO_DEVICE); |
85e034fd LF |
1379 | if (dma_mapping_error(hcd->self.controller, |
1380 | urb->setup_dma)) | |
1381 | return -EAGAIN; | |
ff9c895f | 1382 | urb->transfer_flags |= URB_SETUP_MAP_SINGLE; |
f537da68 | 1383 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1384 | ret = hcd_alloc_coherent( |
1385 | urb->dev->bus, mem_flags, | |
1386 | &urb->setup_dma, | |
1387 | (void **)&urb->setup_packet, | |
1388 | sizeof(struct usb_ctrlrequest), | |
1389 | DMA_TO_DEVICE); | |
ff9c895f AS |
1390 | if (ret) |
1391 | return ret; | |
1392 | urb->transfer_flags |= URB_SETUP_MAP_LOCAL; | |
f537da68 | 1393 | } |
b3476675 MD |
1394 | } |
1395 | ||
1396 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
ff9c895f | 1397 | if (urb->transfer_buffer_length != 0 |
b3476675 | 1398 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { |
85e034fd | 1399 | if (hcd->self.uses_dma) { |
ff9c895f | 1400 | if (urb->num_sgs) { |
fe2072cc HG |
1401 | int n; |
1402 | ||
1403 | /* We don't support sg for isoc transfers ! */ | |
1404 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { | |
1405 | WARN_ON(1); | |
1406 | return -EINVAL; | |
1407 | } | |
1408 | ||
1409 | n = dma_map_sg( | |
ff9c895f | 1410 | hcd->self.controller, |
910f8d0c | 1411 | urb->sg, |
ff9c895f AS |
1412 | urb->num_sgs, |
1413 | dir); | |
1414 | if (n <= 0) | |
1415 | ret = -EAGAIN; | |
1416 | else | |
1417 | urb->transfer_flags |= URB_DMA_MAP_SG; | |
bc677d5b CL |
1418 | urb->num_mapped_sgs = n; |
1419 | if (n != urb->num_sgs) | |
ff9c895f AS |
1420 | urb->transfer_flags |= |
1421 | URB_DMA_SG_COMBINED; | |
ff9c895f | 1422 | } else if (urb->sg) { |
910f8d0c | 1423 | struct scatterlist *sg = urb->sg; |
ff9c895f AS |
1424 | urb->transfer_dma = dma_map_page( |
1425 | hcd->self.controller, | |
1426 | sg_page(sg), | |
1427 | sg->offset, | |
1428 | urb->transfer_buffer_length, | |
1429 | dir); | |
1430 | if (dma_mapping_error(hcd->self.controller, | |
85e034fd | 1431 | urb->transfer_dma)) |
ff9c895f AS |
1432 | ret = -EAGAIN; |
1433 | else | |
1434 | urb->transfer_flags |= URB_DMA_MAP_PAGE; | |
1435 | } else { | |
1436 | urb->transfer_dma = dma_map_single( | |
1437 | hcd->self.controller, | |
1438 | urb->transfer_buffer, | |
1439 | urb->transfer_buffer_length, | |
1440 | dir); | |
1441 | if (dma_mapping_error(hcd->self.controller, | |
1442 | urb->transfer_dma)) | |
1443 | ret = -EAGAIN; | |
1444 | else | |
1445 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; | |
1446 | } | |
85e034fd | 1447 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1448 | ret = hcd_alloc_coherent( |
1449 | urb->dev->bus, mem_flags, | |
1450 | &urb->transfer_dma, | |
1451 | &urb->transfer_buffer, | |
1452 | urb->transfer_buffer_length, | |
1453 | dir); | |
ff9c895f AS |
1454 | if (ret == 0) |
1455 | urb->transfer_flags |= URB_MAP_LOCAL; | |
b3476675 | 1456 | } |
ff9c895f AS |
1457 | if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | |
1458 | URB_SETUP_MAP_LOCAL))) | |
c8cf203a | 1459 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
1da177e4 | 1460 | } |
b3476675 | 1461 | return ret; |
9a9bf406 | 1462 | } |
2694a48d | 1463 | EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); |
1da177e4 | 1464 | |
9a9bf406 AS |
1465 | /*-------------------------------------------------------------------------*/ |
1466 | ||
1467 | /* may be called in any context with a valid urb->dev usecount | |
1468 | * caller surrenders "ownership" of urb | |
1469 | * expects usb_submit_urb() to have sanity checked and conditioned all | |
1470 | * inputs in the urb | |
1471 | */ | |
1472 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) | |
1473 | { | |
1474 | int status; | |
1475 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); | |
1476 | ||
1477 | /* increment urb's reference count as part of giving it to the HCD | |
1478 | * (which will control it). HCD guarantees that it either returns | |
1479 | * an error or calls giveback(), but not both. | |
1480 | */ | |
1481 | usb_get_urb(urb); | |
1482 | atomic_inc(&urb->use_count); | |
4d59d8a1 | 1483 | atomic_inc(&urb->dev->urbnum); |
9a9bf406 AS |
1484 | usbmon_urb_submit(&hcd->self, urb); |
1485 | ||
1486 | /* NOTE requirements on root-hub callers (usbfs and the hub | |
1487 | * driver, for now): URBs' urb->transfer_buffer must be | |
1488 | * valid and usb_buffer_{sync,unmap}() not be needed, since | |
1489 | * they could clobber root hub response data. Also, control | |
1490 | * URBs must be submitted in process context with interrupts | |
1491 | * enabled. | |
1492 | */ | |
b3476675 | 1493 | |
ff9c895f | 1494 | if (is_root_hub(urb->dev)) { |
e9df41c5 | 1495 | status = rh_urb_enqueue(hcd, urb); |
ff9c895f AS |
1496 | } else { |
1497 | status = map_urb_for_dma(hcd, urb, mem_flags); | |
1498 | if (likely(status == 0)) { | |
1499 | status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); | |
1500 | if (unlikely(status)) | |
2694a48d | 1501 | unmap_urb_for_dma(hcd, urb); |
ff9c895f AS |
1502 | } |
1503 | } | |
9a9bf406 AS |
1504 | |
1505 | if (unlikely(status)) { | |
1da177e4 | 1506 | usbmon_urb_submit_error(&hcd->self, urb, status); |
b0d9efba | 1507 | urb->hcpriv = NULL; |
9a9bf406 AS |
1508 | INIT_LIST_HEAD(&urb->urb_list); |
1509 | atomic_dec(&urb->use_count); | |
4d59d8a1 | 1510 | atomic_dec(&urb->dev->urbnum); |
49367d8f | 1511 | if (atomic_read(&urb->reject)) |
9a9bf406 AS |
1512 | wake_up(&usb_kill_urb_queue); |
1513 | usb_put_urb(urb); | |
1da177e4 LT |
1514 | } |
1515 | return status; | |
1516 | } | |
1517 | ||
1518 | /*-------------------------------------------------------------------------*/ | |
1519 | ||
1da177e4 LT |
1520 | /* this makes the hcd giveback() the urb more quickly, by kicking it |
1521 | * off hardware queues (which may take a while) and returning it as | |
1522 | * soon as practical. we've already set up the urb's return status, | |
1523 | * but we can't know if the callback completed already. | |
1524 | */ | |
e9df41c5 | 1525 | static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
1526 | { |
1527 | int value; | |
1528 | ||
809a58b8 | 1529 | if (is_root_hub(urb->dev)) |
e9df41c5 | 1530 | value = usb_rh_urb_dequeue(hcd, urb, status); |
1da177e4 LT |
1531 | else { |
1532 | ||
1533 | /* The only reason an HCD might fail this call is if | |
1534 | * it has not yet fully queued the urb to begin with. | |
1535 | * Such failures should be harmless. */ | |
e9df41c5 | 1536 | value = hcd->driver->urb_dequeue(hcd, urb, status); |
1da177e4 | 1537 | } |
1da177e4 LT |
1538 | return value; |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * called in any context | |
1543 | * | |
1544 | * caller guarantees urb won't be recycled till both unlink() | |
1545 | * and the urb's completion function return | |
1546 | */ | |
a6d2bb9f | 1547 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
1da177e4 | 1548 | { |
9a9bf406 | 1549 | struct usb_hcd *hcd; |
cde217a5 AS |
1550 | int retval = -EIDRM; |
1551 | unsigned long flags; | |
1da177e4 | 1552 | |
cde217a5 AS |
1553 | /* Prevent the device and bus from going away while |
1554 | * the unlink is carried out. If they are already gone | |
1555 | * then urb->use_count must be 0, since disconnected | |
1556 | * devices can't have any active URBs. | |
1557 | */ | |
1558 | spin_lock_irqsave(&hcd_urb_unlink_lock, flags); | |
1559 | if (atomic_read(&urb->use_count) > 0) { | |
1560 | retval = 0; | |
1561 | usb_get_dev(urb->dev); | |
1562 | } | |
1563 | spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); | |
1564 | if (retval == 0) { | |
1565 | hcd = bus_to_hcd(urb->dev->bus); | |
1566 | retval = unlink1(hcd, urb, status); | |
1567 | usb_put_dev(urb->dev); | |
1568 | } | |
1da177e4 | 1569 | |
1da177e4 LT |
1570 | if (retval == 0) |
1571 | retval = -EINPROGRESS; | |
e9df41c5 | 1572 | else if (retval != -EIDRM && retval != -EBUSY) |
9a9bf406 AS |
1573 | dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", |
1574 | urb, retval); | |
1da177e4 LT |
1575 | return retval; |
1576 | } | |
1577 | ||
1578 | /*-------------------------------------------------------------------------*/ | |
1579 | ||
32aca560 AS |
1580 | /** |
1581 | * usb_hcd_giveback_urb - return URB from HCD to device driver | |
1582 | * @hcd: host controller returning the URB | |
1583 | * @urb: urb being returned to the USB device driver. | |
4a00027d | 1584 | * @status: completion status code for the URB. |
32aca560 AS |
1585 | * Context: in_interrupt() |
1586 | * | |
1587 | * This hands the URB from HCD to its USB device driver, using its | |
1588 | * completion function. The HCD has freed all per-urb resources | |
1589 | * (and is done using urb->hcpriv). It also released all HCD locks; | |
1590 | * the device driver won't cause problems if it frees, modifies, | |
1591 | * or resubmits this URB. | |
eb231054 | 1592 | * |
4a00027d | 1593 | * If @urb was unlinked, the value of @status will be overridden by |
eb231054 AS |
1594 | * @urb->unlinked. Erroneous short transfers are detected in case |
1595 | * the HCD hasn't checked for them. | |
32aca560 | 1596 | */ |
4a00027d | 1597 | void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) |
32aca560 | 1598 | { |
b0d9efba | 1599 | urb->hcpriv = NULL; |
eb231054 | 1600 | if (unlikely(urb->unlinked)) |
4a00027d | 1601 | status = urb->unlinked; |
eb231054 | 1602 | else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && |
b0d9efba | 1603 | urb->actual_length < urb->transfer_buffer_length && |
4a00027d AS |
1604 | !status)) |
1605 | status = -EREMOTEIO; | |
32aca560 | 1606 | |
2694a48d | 1607 | unmap_urb_for_dma(hcd, urb); |
4a00027d | 1608 | usbmon_urb_complete(&hcd->self, urb, status); |
1f5a3d0f AS |
1609 | usb_unanchor_urb(urb); |
1610 | ||
32aca560 | 1611 | /* pass ownership to the completion handler */ |
4a00027d | 1612 | urb->status = status; |
32aca560 AS |
1613 | urb->complete (urb); |
1614 | atomic_dec (&urb->use_count); | |
49367d8f | 1615 | if (unlikely(atomic_read(&urb->reject))) |
32aca560 AS |
1616 | wake_up (&usb_kill_urb_queue); |
1617 | usb_put_urb (urb); | |
1618 | } | |
782e70c6 | 1619 | EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); |
32aca560 AS |
1620 | |
1621 | /*-------------------------------------------------------------------------*/ | |
1622 | ||
95cf82f9 AS |
1623 | /* Cancel all URBs pending on this endpoint and wait for the endpoint's |
1624 | * queue to drain completely. The caller must first insure that no more | |
1625 | * URBs can be submitted for this endpoint. | |
1da177e4 | 1626 | */ |
95cf82f9 | 1627 | void usb_hcd_flush_endpoint(struct usb_device *udev, |
a6d2bb9f | 1628 | struct usb_host_endpoint *ep) |
1da177e4 LT |
1629 | { |
1630 | struct usb_hcd *hcd; | |
1631 | struct urb *urb; | |
1632 | ||
95cf82f9 AS |
1633 | if (!ep) |
1634 | return; | |
9a9bf406 | 1635 | might_sleep(); |
17200583 | 1636 | hcd = bus_to_hcd(udev->bus); |
1da177e4 | 1637 | |
95cf82f9 | 1638 | /* No more submits can occur */ |
9a9bf406 | 1639 | spin_lock_irq(&hcd_urb_list_lock); |
ddc1fd6a | 1640 | rescan: |
1da177e4 | 1641 | list_for_each_entry (urb, &ep->urb_list, urb_list) { |
5e60a161 | 1642 | int is_in; |
1da177e4 | 1643 | |
eb231054 | 1644 | if (urb->unlinked) |
1da177e4 LT |
1645 | continue; |
1646 | usb_get_urb (urb); | |
5e60a161 | 1647 | is_in = usb_urb_dir_in(urb); |
809a58b8 | 1648 | spin_unlock(&hcd_urb_list_lock); |
1da177e4 | 1649 | |
e9df41c5 AS |
1650 | /* kick hcd */ |
1651 | unlink1(hcd, urb, -ESHUTDOWN); | |
1652 | dev_dbg (hcd->self.controller, | |
1653 | "shutdown urb %p ep%d%s%s\n", | |
1654 | urb, usb_endpoint_num(&ep->desc), | |
1655 | is_in ? "in" : "out", | |
1656 | ({ char *s; | |
1657 | ||
1658 | switch (usb_endpoint_type(&ep->desc)) { | |
1659 | case USB_ENDPOINT_XFER_CONTROL: | |
1660 | s = ""; break; | |
1661 | case USB_ENDPOINT_XFER_BULK: | |
1662 | s = "-bulk"; break; | |
1663 | case USB_ENDPOINT_XFER_INT: | |
1664 | s = "-intr"; break; | |
1665 | default: | |
1666 | s = "-iso"; break; | |
1667 | }; | |
1668 | s; | |
1669 | })); | |
1da177e4 LT |
1670 | usb_put_urb (urb); |
1671 | ||
1672 | /* list contents may have changed */ | |
ddc1fd6a | 1673 | spin_lock(&hcd_urb_list_lock); |
1da177e4 LT |
1674 | goto rescan; |
1675 | } | |
9a9bf406 | 1676 | spin_unlock_irq(&hcd_urb_list_lock); |
1da177e4 | 1677 | |
95cf82f9 | 1678 | /* Wait until the endpoint queue is completely empty */ |
455b25fb | 1679 | while (!list_empty (&ep->urb_list)) { |
809a58b8 | 1680 | spin_lock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1681 | |
1682 | /* The list may have changed while we acquired the spinlock */ | |
1683 | urb = NULL; | |
1684 | if (!list_empty (&ep->urb_list)) { | |
1685 | urb = list_entry (ep->urb_list.prev, struct urb, | |
1686 | urb_list); | |
1687 | usb_get_urb (urb); | |
1688 | } | |
809a58b8 | 1689 | spin_unlock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1690 | |
1691 | if (urb) { | |
1692 | usb_kill_urb (urb); | |
1693 | usb_put_urb (urb); | |
1694 | } | |
1695 | } | |
1da177e4 LT |
1696 | } |
1697 | ||
3f0479e0 | 1698 | /** |
70445ae6 RD |
1699 | * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds |
1700 | * the bus bandwidth | |
1701 | * @udev: target &usb_device | |
3f0479e0 SS |
1702 | * @new_config: new configuration to install |
1703 | * @cur_alt: the current alternate interface setting | |
1704 | * @new_alt: alternate interface setting that is being installed | |
1705 | * | |
1706 | * To change configurations, pass in the new configuration in new_config, | |
1707 | * and pass NULL for cur_alt and new_alt. | |
1708 | * | |
1709 | * To reset a device's configuration (put the device in the ADDRESSED state), | |
1710 | * pass in NULL for new_config, cur_alt, and new_alt. | |
1711 | * | |
1712 | * To change alternate interface settings, pass in NULL for new_config, | |
1713 | * pass in the current alternate interface setting in cur_alt, | |
1714 | * and pass in the new alternate interface setting in new_alt. | |
1715 | * | |
1716 | * Returns an error if the requested bandwidth change exceeds the | |
1717 | * bus bandwidth or host controller internal resources. | |
79abb1ab | 1718 | */ |
3f0479e0 | 1719 | int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 1720 | struct usb_host_config *new_config, |
3f0479e0 SS |
1721 | struct usb_host_interface *cur_alt, |
1722 | struct usb_host_interface *new_alt) | |
79abb1ab SS |
1723 | { |
1724 | int num_intfs, i, j; | |
576a362a | 1725 | struct usb_host_interface *alt = NULL; |
79abb1ab SS |
1726 | int ret = 0; |
1727 | struct usb_hcd *hcd; | |
1728 | struct usb_host_endpoint *ep; | |
1729 | ||
1730 | hcd = bus_to_hcd(udev->bus); | |
1731 | if (!hcd->driver->check_bandwidth) | |
1732 | return 0; | |
1733 | ||
1734 | /* Configuration is being removed - set configuration 0 */ | |
3f0479e0 | 1735 | if (!new_config && !cur_alt) { |
79abb1ab SS |
1736 | for (i = 1; i < 16; ++i) { |
1737 | ep = udev->ep_out[i]; | |
1738 | if (ep) | |
1739 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1740 | ep = udev->ep_in[i]; | |
1741 | if (ep) | |
1742 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1743 | } | |
1744 | hcd->driver->check_bandwidth(hcd, udev); | |
1745 | return 0; | |
1746 | } | |
1747 | /* Check if the HCD says there's enough bandwidth. Enable all endpoints | |
1748 | * each interface's alt setting 0 and ask the HCD to check the bandwidth | |
1749 | * of the bus. There will always be bandwidth for endpoint 0, so it's | |
1750 | * ok to exclude it. | |
1751 | */ | |
1752 | if (new_config) { | |
1753 | num_intfs = new_config->desc.bNumInterfaces; | |
1754 | /* Remove endpoints (except endpoint 0, which is always on the | |
1755 | * schedule) from the old config from the schedule | |
1756 | */ | |
1757 | for (i = 1; i < 16; ++i) { | |
1758 | ep = udev->ep_out[i]; | |
1759 | if (ep) { | |
1760 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
1761 | if (ret < 0) | |
1762 | goto reset; | |
1763 | } | |
1764 | ep = udev->ep_in[i]; | |
1765 | if (ep) { | |
1766 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
1767 | if (ret < 0) | |
1768 | goto reset; | |
1769 | } | |
1770 | } | |
1771 | for (i = 0; i < num_intfs; ++i) { | |
d837e219 SS |
1772 | struct usb_host_interface *first_alt; |
1773 | int iface_num; | |
1774 | ||
1775 | first_alt = &new_config->intf_cache[i]->altsetting[0]; | |
1776 | iface_num = first_alt->desc.bInterfaceNumber; | |
91017f9c | 1777 | /* Set up endpoints for alternate interface setting 0 */ |
d837e219 | 1778 | alt = usb_find_alt_setting(new_config, iface_num, 0); |
3f0479e0 SS |
1779 | if (!alt) |
1780 | /* No alt setting 0? Pick the first setting. */ | |
d837e219 | 1781 | alt = first_alt; |
3f0479e0 | 1782 | |
79abb1ab SS |
1783 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { |
1784 | ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); | |
1785 | if (ret < 0) | |
1786 | goto reset; | |
1787 | } | |
1788 | } | |
1789 | } | |
3f0479e0 | 1790 | if (cur_alt && new_alt) { |
04a723ea SS |
1791 | struct usb_interface *iface = usb_ifnum_to_if(udev, |
1792 | cur_alt->desc.bInterfaceNumber); | |
1793 | ||
8a9af4fd SS |
1794 | if (!iface) |
1795 | return -EINVAL; | |
04a723ea SS |
1796 | if (iface->resetting_device) { |
1797 | /* | |
1798 | * The USB core just reset the device, so the xHCI host | |
1799 | * and the device will think alt setting 0 is installed. | |
1800 | * However, the USB core will pass in the alternate | |
1801 | * setting installed before the reset as cur_alt. Dig | |
1802 | * out the alternate setting 0 structure, or the first | |
1803 | * alternate setting if a broken device doesn't have alt | |
1804 | * setting 0. | |
1805 | */ | |
1806 | cur_alt = usb_altnum_to_altsetting(iface, 0); | |
1807 | if (!cur_alt) | |
1808 | cur_alt = &iface->altsetting[0]; | |
1809 | } | |
1810 | ||
3f0479e0 SS |
1811 | /* Drop all the endpoints in the current alt setting */ |
1812 | for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { | |
1813 | ret = hcd->driver->drop_endpoint(hcd, udev, | |
1814 | &cur_alt->endpoint[i]); | |
1815 | if (ret < 0) | |
1816 | goto reset; | |
1817 | } | |
1818 | /* Add all the endpoints in the new alt setting */ | |
1819 | for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { | |
1820 | ret = hcd->driver->add_endpoint(hcd, udev, | |
1821 | &new_alt->endpoint[i]); | |
1822 | if (ret < 0) | |
1823 | goto reset; | |
1824 | } | |
1825 | } | |
79abb1ab SS |
1826 | ret = hcd->driver->check_bandwidth(hcd, udev); |
1827 | reset: | |
1828 | if (ret < 0) | |
1829 | hcd->driver->reset_bandwidth(hcd, udev); | |
1830 | return ret; | |
1831 | } | |
1832 | ||
95cf82f9 AS |
1833 | /* Disables the endpoint: synchronizes with the hcd to make sure all |
1834 | * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must | |
1835 | * have been called previously. Use for set_configuration, set_interface, | |
1836 | * driver removal, physical disconnect. | |
1837 | * | |
1838 | * example: a qh stored in ep->hcpriv, holding state related to endpoint | |
1839 | * type, maxpacket size, toggle, halt status, and scheduling. | |
1840 | */ | |
1841 | void usb_hcd_disable_endpoint(struct usb_device *udev, | |
1842 | struct usb_host_endpoint *ep) | |
1843 | { | |
1844 | struct usb_hcd *hcd; | |
1845 | ||
1846 | might_sleep(); | |
1847 | hcd = bus_to_hcd(udev->bus); | |
1848 | if (hcd->driver->endpoint_disable) | |
1849 | hcd->driver->endpoint_disable(hcd, ep); | |
1850 | } | |
1851 | ||
3444b26a DV |
1852 | /** |
1853 | * usb_hcd_reset_endpoint - reset host endpoint state | |
1854 | * @udev: USB device. | |
1855 | * @ep: the endpoint to reset. | |
1856 | * | |
1857 | * Resets any host endpoint state such as the toggle bit, sequence | |
1858 | * number and current window. | |
1859 | */ | |
1860 | void usb_hcd_reset_endpoint(struct usb_device *udev, | |
1861 | struct usb_host_endpoint *ep) | |
1862 | { | |
1863 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
1864 | ||
1865 | if (hcd->driver->endpoint_reset) | |
1866 | hcd->driver->endpoint_reset(hcd, ep); | |
1867 | else { | |
1868 | int epnum = usb_endpoint_num(&ep->desc); | |
1869 | int is_out = usb_endpoint_dir_out(&ep->desc); | |
1870 | int is_control = usb_endpoint_xfer_control(&ep->desc); | |
1871 | ||
1872 | usb_settoggle(udev, epnum, is_out, 0); | |
1873 | if (is_control) | |
1874 | usb_settoggle(udev, epnum, !is_out, 0); | |
1875 | } | |
1876 | } | |
1877 | ||
eab1cafc SS |
1878 | /** |
1879 | * usb_alloc_streams - allocate bulk endpoint stream IDs. | |
1880 | * @interface: alternate setting that includes all endpoints. | |
1881 | * @eps: array of endpoints that need streams. | |
1882 | * @num_eps: number of endpoints in the array. | |
1883 | * @num_streams: number of streams to allocate. | |
1884 | * @mem_flags: flags hcd should use to allocate memory. | |
1885 | * | |
1886 | * Sets up a group of bulk endpoints to have num_streams stream IDs available. | |
1887 | * Drivers may queue multiple transfers to different stream IDs, which may | |
1888 | * complete in a different order than they were queued. | |
1889 | */ | |
1890 | int usb_alloc_streams(struct usb_interface *interface, | |
1891 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
1892 | unsigned int num_streams, gfp_t mem_flags) | |
1893 | { | |
1894 | struct usb_hcd *hcd; | |
1895 | struct usb_device *dev; | |
1896 | int i; | |
1897 | ||
1898 | dev = interface_to_usbdev(interface); | |
1899 | hcd = bus_to_hcd(dev->bus); | |
1900 | if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) | |
1901 | return -EINVAL; | |
1902 | if (dev->speed != USB_SPEED_SUPER) | |
1903 | return -EINVAL; | |
1904 | ||
1905 | /* Streams only apply to bulk endpoints. */ | |
1906 | for (i = 0; i < num_eps; i++) | |
1907 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) | |
1908 | return -EINVAL; | |
1909 | ||
1910 | return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, | |
1911 | num_streams, mem_flags); | |
1912 | } | |
1913 | EXPORT_SYMBOL_GPL(usb_alloc_streams); | |
1914 | ||
1915 | /** | |
1916 | * usb_free_streams - free bulk endpoint stream IDs. | |
1917 | * @interface: alternate setting that includes all endpoints. | |
1918 | * @eps: array of endpoints to remove streams from. | |
1919 | * @num_eps: number of endpoints in the array. | |
1920 | * @mem_flags: flags hcd should use to allocate memory. | |
1921 | * | |
1922 | * Reverts a group of bulk endpoints back to not using stream IDs. | |
1923 | * Can fail if we are given bad arguments, or HCD is broken. | |
1924 | */ | |
1925 | void usb_free_streams(struct usb_interface *interface, | |
1926 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
1927 | gfp_t mem_flags) | |
1928 | { | |
1929 | struct usb_hcd *hcd; | |
1930 | struct usb_device *dev; | |
1931 | int i; | |
1932 | ||
1933 | dev = interface_to_usbdev(interface); | |
1934 | hcd = bus_to_hcd(dev->bus); | |
1935 | if (dev->speed != USB_SPEED_SUPER) | |
1936 | return; | |
1937 | ||
1938 | /* Streams only apply to bulk endpoints. */ | |
1939 | for (i = 0; i < num_eps; i++) | |
b214f191 | 1940 | if (!eps[i] || !usb_endpoint_xfer_bulk(&eps[i]->desc)) |
eab1cafc SS |
1941 | return; |
1942 | ||
1943 | hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); | |
1944 | } | |
1945 | EXPORT_SYMBOL_GPL(usb_free_streams); | |
1946 | ||
cde217a5 AS |
1947 | /* Protect against drivers that try to unlink URBs after the device |
1948 | * is gone, by waiting until all unlinks for @udev are finished. | |
1949 | * Since we don't currently track URBs by device, simply wait until | |
1950 | * nothing is running in the locked region of usb_hcd_unlink_urb(). | |
1951 | */ | |
1952 | void usb_hcd_synchronize_unlinks(struct usb_device *udev) | |
1953 | { | |
1954 | spin_lock_irq(&hcd_urb_unlink_lock); | |
1955 | spin_unlock_irq(&hcd_urb_unlink_lock); | |
1956 | } | |
1957 | ||
1da177e4 LT |
1958 | /*-------------------------------------------------------------------------*/ |
1959 | ||
32aca560 AS |
1960 | /* called in any context */ |
1961 | int usb_hcd_get_frame_number (struct usb_device *udev) | |
1962 | { | |
1963 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
1964 | ||
9b37596a | 1965 | if (!HCD_RH_RUNNING(hcd)) |
32aca560 AS |
1966 | return -ESHUTDOWN; |
1967 | return hcd->driver->get_frame_number (hcd); | |
1968 | } | |
1969 | ||
1970 | /*-------------------------------------------------------------------------*/ | |
1971 | ||
9293677a | 1972 | #ifdef CONFIG_PM |
1da177e4 | 1973 | |
65bfd296 | 1974 | int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 1975 | { |
686314cf AS |
1976 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
1977 | int status; | |
1978 | int old_state = hcd->state; | |
1da177e4 | 1979 | |
30b1a7a3 AS |
1980 | dev_dbg(&rhdev->dev, "bus %ssuspend, wakeup %d\n", |
1981 | (PMSG_IS_AUTO(msg) ? "auto-" : ""), | |
1982 | rhdev->do_remote_wakeup); | |
9b37596a AS |
1983 | if (HCD_DEAD(hcd)) { |
1984 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); | |
1985 | return 0; | |
1986 | } | |
1987 | ||
686314cf AS |
1988 | if (!hcd->driver->bus_suspend) { |
1989 | status = -ENOENT; | |
1990 | } else { | |
9b37596a | 1991 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
686314cf AS |
1992 | hcd->state = HC_STATE_QUIESCING; |
1993 | status = hcd->driver->bus_suspend(hcd); | |
1994 | } | |
1995 | if (status == 0) { | |
1996 | usb_set_device_state(rhdev, USB_STATE_SUSPENDED); | |
9293677a | 1997 | hcd->state = HC_STATE_SUSPENDED; |
879d38e6 AS |
1998 | |
1999 | /* Did we race with a root-hub wakeup event? */ | |
2000 | if (rhdev->do_remote_wakeup) { | |
2001 | char buffer[6]; | |
2002 | ||
2003 | status = hcd->driver->hub_status_data(hcd, buffer); | |
2004 | if (status != 0) { | |
2005 | dev_dbg(&rhdev->dev, "suspend raced with wakeup event\n"); | |
2006 | hcd_bus_resume(rhdev, PMSG_AUTO_RESUME); | |
2007 | status = -EBUSY; | |
2008 | } | |
2009 | } | |
686314cf | 2010 | } else { |
9b37596a AS |
2011 | spin_lock_irq(&hcd_root_hub_lock); |
2012 | if (!HCD_DEAD(hcd)) { | |
2013 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2014 | hcd->state = old_state; | |
2015 | } | |
2016 | spin_unlock_irq(&hcd_root_hub_lock); | |
686314cf | 2017 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2018 | "suspend", status); |
686314cf | 2019 | } |
9293677a | 2020 | return status; |
1da177e4 LT |
2021 | } |
2022 | ||
65bfd296 | 2023 | int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 2024 | { |
686314cf AS |
2025 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
2026 | int status; | |
cfa59dab | 2027 | int old_state = hcd->state; |
1da177e4 | 2028 | |
30b1a7a3 AS |
2029 | dev_dbg(&rhdev->dev, "usb %sresume\n", |
2030 | (PMSG_IS_AUTO(msg) ? "auto-" : "")); | |
9b37596a AS |
2031 | if (HCD_DEAD(hcd)) { |
2032 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); | |
2033 | return 0; | |
2034 | } | |
0c0382e3 | 2035 | if (!hcd->driver->bus_resume) |
9293677a | 2036 | return -ENOENT; |
9b37596a | 2037 | if (HCD_RH_RUNNING(hcd)) |
979d5199 | 2038 | return 0; |
686314cf | 2039 | |
9293677a | 2040 | hcd->state = HC_STATE_RESUMING; |
686314cf | 2041 | status = hcd->driver->bus_resume(hcd); |
bf3d7d40 | 2042 | clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
686314cf AS |
2043 | if (status == 0) { |
2044 | /* TRSMRCY = 10 msec */ | |
2045 | msleep(10); | |
9b37596a AS |
2046 | spin_lock_irq(&hcd_root_hub_lock); |
2047 | if (!HCD_DEAD(hcd)) { | |
2048 | usb_set_device_state(rhdev, rhdev->actconfig | |
2049 | ? USB_STATE_CONFIGURED | |
2050 | : USB_STATE_ADDRESS); | |
2051 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2052 | hcd->state = HC_STATE_RUNNING; | |
2053 | } | |
2054 | spin_unlock_irq(&hcd_root_hub_lock); | |
686314cf | 2055 | } else { |
cfa59dab | 2056 | hcd->state = old_state; |
686314cf | 2057 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2058 | "resume", status); |
cfa59dab AS |
2059 | if (status != -ESHUTDOWN) |
2060 | usb_hc_died(hcd); | |
9293677a DB |
2061 | } |
2062 | return status; | |
1da177e4 LT |
2063 | } |
2064 | ||
9bbdf1e0 AS |
2065 | #endif /* CONFIG_PM */ |
2066 | ||
2067 | #ifdef CONFIG_USB_SUSPEND | |
2068 | ||
6b157c9b AS |
2069 | /* Workqueue routine for root-hub remote wakeup */ |
2070 | static void hcd_resume_work(struct work_struct *work) | |
2071 | { | |
2072 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); | |
2073 | struct usb_device *udev = hcd->self.root_hub; | |
2074 | ||
2075 | usb_lock_device(udev); | |
0534d468 | 2076 | usb_remote_wakeup(udev); |
6b157c9b AS |
2077 | usb_unlock_device(udev); |
2078 | } | |
2079 | ||
1da177e4 LT |
2080 | /** |
2081 | * usb_hcd_resume_root_hub - called by HCD to resume its root hub | |
2082 | * @hcd: host controller for this root hub | |
2083 | * | |
2084 | * The USB host controller calls this function when its root hub is | |
2085 | * suspended (with the remote wakeup feature enabled) and a remote | |
6b157c9b AS |
2086 | * wakeup request is received. The routine submits a workqueue request |
2087 | * to resume the root hub (that is, manage its downstream ports again). | |
1da177e4 LT |
2088 | */ |
2089 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) | |
2090 | { | |
2091 | unsigned long flags; | |
2092 | ||
2093 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
ff2f0787 AS |
2094 | if (hcd->rh_registered) { |
2095 | set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); | |
9bbdf1e0 | 2096 | queue_work(pm_wq, &hcd->wakeup_work); |
ff2f0787 | 2097 | } |
1da177e4 LT |
2098 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
2099 | } | |
9293677a | 2100 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
1da177e4 | 2101 | |
9bbdf1e0 | 2102 | #endif /* CONFIG_USB_SUSPEND */ |
1da177e4 LT |
2103 | |
2104 | /*-------------------------------------------------------------------------*/ | |
2105 | ||
2106 | #ifdef CONFIG_USB_OTG | |
2107 | ||
2108 | /** | |
2109 | * usb_bus_start_enum - start immediate enumeration (for OTG) | |
2110 | * @bus: the bus (must use hcd framework) | |
2111 | * @port_num: 1-based number of port; usually bus->otg_port | |
2112 | * Context: in_interrupt() | |
2113 | * | |
2114 | * Starts enumeration, with an immediate reset followed later by | |
2115 | * khubd identifying and possibly configuring the device. | |
2116 | * This is needed by OTG controller drivers, where it helps meet | |
2117 | * HNP protocol timing requirements for starting a port reset. | |
2118 | */ | |
2119 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) | |
2120 | { | |
2121 | struct usb_hcd *hcd; | |
2122 | int status = -EOPNOTSUPP; | |
2123 | ||
2124 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, | |
2125 | * boards with root hubs hooked up to internal devices (instead of | |
2126 | * just the OTG port) may need more attention to resetting... | |
2127 | */ | |
2128 | hcd = container_of (bus, struct usb_hcd, self); | |
2129 | if (port_num && hcd->driver->start_port_reset) | |
2130 | status = hcd->driver->start_port_reset(hcd, port_num); | |
2131 | ||
2132 | /* run khubd shortly after (first) root port reset finishes; | |
2133 | * it may issue others, until at least 50 msecs have passed. | |
2134 | */ | |
2135 | if (status == 0) | |
2136 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); | |
2137 | return status; | |
2138 | } | |
782e70c6 | 2139 | EXPORT_SYMBOL_GPL(usb_bus_start_enum); |
1da177e4 LT |
2140 | |
2141 | #endif | |
2142 | ||
2143 | /*-------------------------------------------------------------------------*/ | |
2144 | ||
1da177e4 LT |
2145 | /** |
2146 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) | |
2147 | * @irq: the IRQ being raised | |
2148 | * @__hcd: pointer to the HCD whose IRQ is being signaled | |
1da177e4 LT |
2149 | * |
2150 | * If the controller isn't HALTed, calls the driver's irq handler. | |
2151 | * Checks whether the controller is now dead. | |
2152 | */ | |
7d12e780 | 2153 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
1da177e4 LT |
2154 | { |
2155 | struct usb_hcd *hcd = __hcd; | |
de85422b SB |
2156 | unsigned long flags; |
2157 | irqreturn_t rc; | |
1da177e4 | 2158 | |
de85422b SB |
2159 | /* IRQF_DISABLED doesn't work correctly with shared IRQs |
2160 | * when the first handler doesn't use it. So let's just | |
2161 | * assume it's never used. | |
2162 | */ | |
2163 | local_irq_save(flags); | |
1da177e4 | 2164 | |
968b822c | 2165 | if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) |
de85422b | 2166 | rc = IRQ_NONE; |
968b822c | 2167 | else if (hcd->driver->irq(hcd) == IRQ_NONE) |
de85422b | 2168 | rc = IRQ_NONE; |
968b822c | 2169 | else |
de85422b | 2170 | rc = IRQ_HANDLED; |
de85422b SB |
2171 | |
2172 | local_irq_restore(flags); | |
2173 | return rc; | |
1da177e4 | 2174 | } |
43b86af8 | 2175 | EXPORT_SYMBOL_GPL(usb_hcd_irq); |
1da177e4 LT |
2176 | |
2177 | /*-------------------------------------------------------------------------*/ | |
2178 | ||
2179 | /** | |
2180 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) | |
2181 | * @hcd: pointer to the HCD representing the controller | |
2182 | * | |
2183 | * This is called by bus glue to report a USB host controller that died | |
2184 | * while operations may still have been pending. It's called automatically | |
c5635437 SS |
2185 | * by the PCI glue, so only glue for non-PCI busses should need to call it. |
2186 | * | |
2187 | * Only call this function with the primary HCD. | |
1da177e4 LT |
2188 | */ |
2189 | void usb_hc_died (struct usb_hcd *hcd) | |
2190 | { | |
2191 | unsigned long flags; | |
2192 | ||
2193 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); | |
2194 | ||
2195 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
9b37596a AS |
2196 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
2197 | set_bit(HCD_FLAG_DEAD, &hcd->flags); | |
1da177e4 | 2198 | if (hcd->rh_registered) { |
541c7d43 | 2199 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1da177e4 LT |
2200 | |
2201 | /* make khubd clean up old urbs and devices */ | |
2202 | usb_set_device_state (hcd->self.root_hub, | |
2203 | USB_STATE_NOTATTACHED); | |
2204 | usb_kick_khubd (hcd->self.root_hub); | |
2205 | } | |
c5635437 SS |
2206 | if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { |
2207 | hcd = hcd->shared_hcd; | |
2208 | if (hcd->rh_registered) { | |
2209 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
2210 | ||
2211 | /* make khubd clean up old urbs and devices */ | |
2212 | usb_set_device_state(hcd->self.root_hub, | |
2213 | USB_STATE_NOTATTACHED); | |
2214 | usb_kick_khubd(hcd->self.root_hub); | |
2215 | } | |
2216 | } | |
1da177e4 | 2217 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
c5635437 | 2218 | /* Make sure that the other roothub is also deallocated. */ |
1da177e4 LT |
2219 | } |
2220 | EXPORT_SYMBOL_GPL (usb_hc_died); | |
2221 | ||
2222 | /*-------------------------------------------------------------------------*/ | |
2223 | ||
1da177e4 | 2224 | /** |
c5635437 | 2225 | * usb_create_shared_hcd - create and initialize an HCD structure |
1da177e4 LT |
2226 | * @driver: HC driver that will use this hcd |
2227 | * @dev: device for this HC, stored in hcd->self.controller | |
2228 | * @bus_name: value to store in hcd->self.bus_name | |
c5635437 SS |
2229 | * @primary_hcd: a pointer to the usb_hcd structure that is sharing the |
2230 | * PCI device. Only allocate certain resources for the primary HCD | |
1da177e4 LT |
2231 | * Context: !in_interrupt() |
2232 | * | |
2233 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2234 | * HC driver's private data. Initialize the generic members of the | |
2235 | * hcd structure. | |
2236 | * | |
2237 | * If memory is unavailable, returns NULL. | |
2238 | */ | |
c5635437 SS |
2239 | struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
2240 | struct device *dev, const char *bus_name, | |
2241 | struct usb_hcd *primary_hcd) | |
1da177e4 LT |
2242 | { |
2243 | struct usb_hcd *hcd; | |
2244 | ||
7b842b6e | 2245 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
1da177e4 LT |
2246 | if (!hcd) { |
2247 | dev_dbg (dev, "hcd alloc failed\n"); | |
2248 | return NULL; | |
2249 | } | |
c5635437 SS |
2250 | if (primary_hcd == NULL) { |
2251 | hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), | |
2252 | GFP_KERNEL); | |
2253 | if (!hcd->bandwidth_mutex) { | |
2254 | kfree(hcd); | |
2255 | dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); | |
2256 | return NULL; | |
2257 | } | |
2258 | mutex_init(hcd->bandwidth_mutex); | |
2259 | dev_set_drvdata(dev, hcd); | |
2260 | } else { | |
2261 | hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; | |
2262 | hcd->primary_hcd = primary_hcd; | |
2263 | primary_hcd->primary_hcd = primary_hcd; | |
2264 | hcd->shared_hcd = primary_hcd; | |
2265 | primary_hcd->shared_hcd = hcd; | |
d673bfcb | 2266 | } |
d673bfcb | 2267 | |
17200583 | 2268 | kref_init(&hcd->kref); |
1da177e4 LT |
2269 | |
2270 | usb_bus_init(&hcd->self); | |
1da177e4 LT |
2271 | hcd->self.controller = dev; |
2272 | hcd->self.bus_name = bus_name; | |
dd990f16 | 2273 | hcd->self.uses_dma = (dev->dma_mask != NULL); |
1da177e4 LT |
2274 | |
2275 | init_timer(&hcd->rh_timer); | |
d5926ae7 AS |
2276 | hcd->rh_timer.function = rh_timer_func; |
2277 | hcd->rh_timer.data = (unsigned long) hcd; | |
9bbdf1e0 | 2278 | #ifdef CONFIG_USB_SUSPEND |
6b157c9b AS |
2279 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); |
2280 | #endif | |
1da177e4 LT |
2281 | |
2282 | hcd->driver = driver; | |
83de4b2b | 2283 | hcd->speed = driver->flags & HCD_MASK; |
1da177e4 LT |
2284 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : |
2285 | "USB Host Controller"; | |
1da177e4 LT |
2286 | return hcd; |
2287 | } | |
c5635437 SS |
2288 | EXPORT_SYMBOL_GPL(usb_create_shared_hcd); |
2289 | ||
2290 | /** | |
2291 | * usb_create_hcd - create and initialize an HCD structure | |
2292 | * @driver: HC driver that will use this hcd | |
2293 | * @dev: device for this HC, stored in hcd->self.controller | |
2294 | * @bus_name: value to store in hcd->self.bus_name | |
2295 | * Context: !in_interrupt() | |
2296 | * | |
2297 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2298 | * HC driver's private data. Initialize the generic members of the | |
2299 | * hcd structure. | |
2300 | * | |
2301 | * If memory is unavailable, returns NULL. | |
2302 | */ | |
2303 | struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, | |
2304 | struct device *dev, const char *bus_name) | |
2305 | { | |
2306 | return usb_create_shared_hcd(driver, dev, bus_name, NULL); | |
2307 | } | |
782e70c6 | 2308 | EXPORT_SYMBOL_GPL(usb_create_hcd); |
1da177e4 | 2309 | |
c5635437 SS |
2310 | /* |
2311 | * Roothubs that share one PCI device must also share the bandwidth mutex. | |
2312 | * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is | |
2313 | * deallocated. | |
2314 | * | |
2315 | * Make sure to only deallocate the bandwidth_mutex when the primary HCD is | |
2316 | * freed. When hcd_release() is called for the non-primary HCD, set the | |
2317 | * primary_hcd's shared_hcd pointer to null (since the non-primary HCD will be | |
2318 | * freed shortly). | |
2319 | */ | |
17200583 AS |
2320 | static void hcd_release (struct kref *kref) |
2321 | { | |
2322 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); | |
2323 | ||
c5635437 SS |
2324 | if (usb_hcd_is_primary_hcd(hcd)) |
2325 | kfree(hcd->bandwidth_mutex); | |
2326 | else | |
2327 | hcd->shared_hcd->shared_hcd = NULL; | |
17200583 AS |
2328 | kfree(hcd); |
2329 | } | |
2330 | ||
2331 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) | |
2332 | { | |
2333 | if (hcd) | |
2334 | kref_get (&hcd->kref); | |
2335 | return hcd; | |
2336 | } | |
782e70c6 | 2337 | EXPORT_SYMBOL_GPL(usb_get_hcd); |
17200583 | 2338 | |
1da177e4 LT |
2339 | void usb_put_hcd (struct usb_hcd *hcd) |
2340 | { | |
17200583 AS |
2341 | if (hcd) |
2342 | kref_put (&hcd->kref, hcd_release); | |
1da177e4 | 2343 | } |
782e70c6 | 2344 | EXPORT_SYMBOL_GPL(usb_put_hcd); |
1da177e4 | 2345 | |
c5635437 SS |
2346 | int usb_hcd_is_primary_hcd(struct usb_hcd *hcd) |
2347 | { | |
2348 | if (!hcd->primary_hcd) | |
2349 | return 1; | |
2350 | return hcd == hcd->primary_hcd; | |
2351 | } | |
2352 | EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); | |
2353 | ||
23e0d106 SS |
2354 | static int usb_hcd_request_irqs(struct usb_hcd *hcd, |
2355 | unsigned int irqnum, unsigned long irqflags) | |
2356 | { | |
2357 | int retval; | |
2358 | ||
2359 | if (hcd->driver->irq) { | |
2360 | ||
2361 | /* IRQF_DISABLED doesn't work as advertised when used together | |
2362 | * with IRQF_SHARED. As usb_hcd_irq() will always disable | |
2363 | * interrupts we can remove it here. | |
2364 | */ | |
2365 | if (irqflags & IRQF_SHARED) | |
2366 | irqflags &= ~IRQF_DISABLED; | |
2367 | ||
2368 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", | |
2369 | hcd->driver->description, hcd->self.busnum); | |
2370 | retval = request_irq(irqnum, &usb_hcd_irq, irqflags, | |
2371 | hcd->irq_descr, hcd); | |
2372 | if (retval != 0) { | |
2373 | dev_err(hcd->self.controller, | |
2374 | "request interrupt %d failed\n", | |
2375 | irqnum); | |
2376 | return retval; | |
2377 | } | |
2378 | hcd->irq = irqnum; | |
2379 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, | |
2380 | (hcd->driver->flags & HCD_MEMORY) ? | |
2381 | "io mem" : "io base", | |
2382 | (unsigned long long)hcd->rsrc_start); | |
2383 | } else { | |
cd70469d | 2384 | hcd->irq = 0; |
23e0d106 SS |
2385 | if (hcd->rsrc_start) |
2386 | dev_info(hcd->self.controller, "%s 0x%08llx\n", | |
2387 | (hcd->driver->flags & HCD_MEMORY) ? | |
2388 | "io mem" : "io base", | |
2389 | (unsigned long long)hcd->rsrc_start); | |
2390 | } | |
2391 | return 0; | |
2392 | } | |
2393 | ||
1da177e4 LT |
2394 | /** |
2395 | * usb_add_hcd - finish generic HCD structure initialization and register | |
2396 | * @hcd: the usb_hcd structure to initialize | |
2397 | * @irqnum: Interrupt line to allocate | |
2398 | * @irqflags: Interrupt type flags | |
2399 | * | |
2400 | * Finish the remaining parts of generic HCD initialization: allocate the | |
2401 | * buffers of consistent memory, register the bus, request the IRQ line, | |
2402 | * and call the driver's reset() and start() routines. | |
2403 | */ | |
2404 | int usb_add_hcd(struct usb_hcd *hcd, | |
2405 | unsigned int irqnum, unsigned long irqflags) | |
2406 | { | |
8ec8d20b AS |
2407 | int retval; |
2408 | struct usb_device *rhdev; | |
1da177e4 LT |
2409 | |
2410 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); | |
2411 | ||
c4fc2342 CDH |
2412 | /* Keep old behaviour if authorized_default is not in [0, 1]. */ |
2413 | if (authorized_default < 0 || authorized_default > 1) | |
2414 | hcd->authorized_default = hcd->wireless? 0 : 1; | |
2415 | else | |
2416 | hcd->authorized_default = authorized_default; | |
8de98402 BH |
2417 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
2418 | ||
b1e8f0a6 DB |
2419 | /* HC is in reset state, but accessible. Now do the one-time init, |
2420 | * bottom up so that hcds can customize the root hubs before khubd | |
2421 | * starts talking to them. (Note, bus id is assigned early too.) | |
2422 | */ | |
1da177e4 LT |
2423 | if ((retval = hcd_buffer_create(hcd)) != 0) { |
2424 | dev_dbg(hcd->self.controller, "pool alloc failed\n"); | |
2425 | return retval; | |
2426 | } | |
2427 | ||
2428 | if ((retval = usb_register_bus(&hcd->self)) < 0) | |
8ec8d20b | 2429 | goto err_register_bus; |
1da177e4 | 2430 | |
b1e8f0a6 DB |
2431 | if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { |
2432 | dev_err(hcd->self.controller, "unable to allocate root hub\n"); | |
2433 | retval = -ENOMEM; | |
2434 | goto err_allocate_root_hub; | |
2435 | } | |
6d88e679 | 2436 | hcd->self.root_hub = rhdev; |
6b403b02 | 2437 | |
83de4b2b | 2438 | switch (hcd->speed) { |
6b403b02 SS |
2439 | case HCD_USB11: |
2440 | rhdev->speed = USB_SPEED_FULL; | |
2441 | break; | |
2442 | case HCD_USB2: | |
2443 | rhdev->speed = USB_SPEED_HIGH; | |
2444 | break; | |
2445 | case HCD_USB3: | |
2446 | rhdev->speed = USB_SPEED_SUPER; | |
2447 | break; | |
2448 | default: | |
1d15ee4c | 2449 | retval = -EINVAL; |
96e077ae | 2450 | goto err_set_rh_speed; |
6b403b02 | 2451 | } |
b1e8f0a6 | 2452 | |
db4cefaa DB |
2453 | /* wakeup flag init defaults to "everything works" for root hubs, |
2454 | * but drivers can override it in reset() if needed, along with | |
2455 | * recording the overall controller's system wakeup capability. | |
2456 | */ | |
a6eeeb9f | 2457 | device_set_wakeup_capable(&rhdev->dev, 1); |
db4cefaa | 2458 | |
9b37596a AS |
2459 | /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is |
2460 | * registered. But since the controller can die at any time, | |
2461 | * let's initialize the flag before touching the hardware. | |
2462 | */ | |
2463 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2464 | ||
b1e8f0a6 DB |
2465 | /* "reset" is misnamed; its role is now one-time init. the controller |
2466 | * should already have been reset (and boot firmware kicked off etc). | |
2467 | */ | |
2468 | if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { | |
2469 | dev_err(hcd->self.controller, "can't setup\n"); | |
2470 | goto err_hcd_driver_setup; | |
2471 | } | |
6d88e679 | 2472 | hcd->rh_pollable = 1; |
b1e8f0a6 | 2473 | |
fb669cc0 DB |
2474 | /* NOTE: root hub and controller capabilities may not be the same */ |
2475 | if (device_can_wakeup(hcd->self.controller) | |
2476 | && device_can_wakeup(&hcd->self.root_hub->dev)) | |
b1e8f0a6 | 2477 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
b1e8f0a6 | 2478 | |
68d07f64 SS |
2479 | /* enable irqs just before we start the controller, |
2480 | * if the BIOS provides legacy PCI irqs. | |
2481 | */ | |
2482 | if (usb_hcd_is_primary_hcd(hcd) && irqnum) { | |
c5635437 SS |
2483 | retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); |
2484 | if (retval) | |
2485 | goto err_request_irq; | |
2486 | } | |
1da177e4 | 2487 | |
4814030c | 2488 | hcd->state = HC_STATE_RUNNING; |
abc4f9b0 SS |
2489 | retval = hcd->driver->start(hcd); |
2490 | if (retval < 0) { | |
1da177e4 | 2491 | dev_err(hcd->self.controller, "startup error %d\n", retval); |
8ec8d20b | 2492 | goto err_hcd_driver_start; |
1da177e4 LT |
2493 | } |
2494 | ||
b1e8f0a6 | 2495 | /* starting here, usbcore will pay attention to this root hub */ |
55c52718 | 2496 | rhdev->bus_mA = min(500u, hcd->power_budget); |
b1e8f0a6 | 2497 | if ((retval = register_root_hub(hcd)) != 0) |
8ec8d20b AS |
2498 | goto err_register_root_hub; |
2499 | ||
5234ce1b IPG |
2500 | retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
2501 | if (retval < 0) { | |
2502 | printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", | |
2503 | retval); | |
2504 | goto error_create_attr_group; | |
2505 | } | |
541c7d43 | 2506 | if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) |
d5926ae7 | 2507 | usb_hcd_poll_rh_status(hcd); |
a6eeeb9f AS |
2508 | |
2509 | /* | |
2510 | * Host controllers don't generate their own wakeup requests; | |
2511 | * they only forward requests from the root hub. Therefore | |
2512 | * controllers should always be enabled for remote wakeup. | |
2513 | */ | |
2514 | device_wakeup_enable(hcd->self.controller); | |
1da177e4 LT |
2515 | return retval; |
2516 | ||
5234ce1b | 2517 | error_create_attr_group: |
9b37596a | 2518 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
96e077ae AS |
2519 | if (HC_IS_RUNNING(hcd->state)) |
2520 | hcd->state = HC_STATE_QUIESCING; | |
2521 | spin_lock_irq(&hcd_root_hub_lock); | |
2522 | hcd->rh_registered = 0; | |
2523 | spin_unlock_irq(&hcd_root_hub_lock); | |
2524 | ||
2525 | #ifdef CONFIG_USB_SUSPEND | |
2526 | cancel_work_sync(&hcd->wakeup_work); | |
2527 | #endif | |
5234ce1b | 2528 | mutex_lock(&usb_bus_list_lock); |
6d88e679 | 2529 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
5234ce1b | 2530 | mutex_unlock(&usb_bus_list_lock); |
b1e8f0a6 | 2531 | err_register_root_hub: |
6d88e679 | 2532 | hcd->rh_pollable = 0; |
541c7d43 | 2533 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 | 2534 | del_timer_sync(&hcd->rh_timer); |
8ec8d20b | 2535 | hcd->driver->stop(hcd); |
96e077ae | 2536 | hcd->state = HC_STATE_HALT; |
541c7d43 | 2537 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
96e077ae | 2538 | del_timer_sync(&hcd->rh_timer); |
b1e8f0a6 | 2539 | err_hcd_driver_start: |
cd70469d | 2540 | if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) |
1da177e4 | 2541 | free_irq(irqnum, hcd); |
b1e8f0a6 DB |
2542 | err_request_irq: |
2543 | err_hcd_driver_setup: | |
96e077ae | 2544 | err_set_rh_speed: |
6d88e679 | 2545 | usb_put_dev(hcd->self.root_hub); |
b1e8f0a6 | 2546 | err_allocate_root_hub: |
1da177e4 | 2547 | usb_deregister_bus(&hcd->self); |
b1e8f0a6 | 2548 | err_register_bus: |
1da177e4 LT |
2549 | hcd_buffer_destroy(hcd); |
2550 | return retval; | |
2551 | } | |
782e70c6 | 2552 | EXPORT_SYMBOL_GPL(usb_add_hcd); |
1da177e4 LT |
2553 | |
2554 | /** | |
2555 | * usb_remove_hcd - shutdown processing for generic HCDs | |
2556 | * @hcd: the usb_hcd structure to remove | |
2557 | * Context: !in_interrupt() | |
2558 | * | |
2559 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), | |
2560 | * invoking the HCD's stop() method. | |
2561 | */ | |
2562 | void usb_remove_hcd(struct usb_hcd *hcd) | |
2563 | { | |
6d88e679 AS |
2564 | struct usb_device *rhdev = hcd->self.root_hub; |
2565 | ||
1da177e4 LT |
2566 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); |
2567 | ||
6d88e679 AS |
2568 | usb_get_dev(rhdev); |
2569 | sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); | |
96e077ae | 2570 | |
9b37596a | 2571 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
1da177e4 LT |
2572 | if (HC_IS_RUNNING (hcd->state)) |
2573 | hcd->state = HC_STATE_QUIESCING; | |
2574 | ||
2575 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); | |
2576 | spin_lock_irq (&hcd_root_hub_lock); | |
2577 | hcd->rh_registered = 0; | |
2578 | spin_unlock_irq (&hcd_root_hub_lock); | |
9ad3d6cc | 2579 | |
9bbdf1e0 | 2580 | #ifdef CONFIG_USB_SUSPEND |
d5d4db70 | 2581 | cancel_work_sync(&hcd->wakeup_work); |
6b157c9b AS |
2582 | #endif |
2583 | ||
4186ecf8 | 2584 | mutex_lock(&usb_bus_list_lock); |
6d88e679 | 2585 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
4186ecf8 | 2586 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 2587 | |
6d88e679 AS |
2588 | /* Prevent any more root-hub status calls from the timer. |
2589 | * The HCD might still restart the timer (if a port status change | |
2590 | * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke | |
2591 | * the hub_status_data() callback. | |
2592 | */ | |
2593 | hcd->rh_pollable = 0; | |
541c7d43 | 2594 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 AS |
2595 | del_timer_sync(&hcd->rh_timer); |
2596 | ||
1da177e4 LT |
2597 | hcd->driver->stop(hcd); |
2598 | hcd->state = HC_STATE_HALT; | |
2599 | ||
6d88e679 | 2600 | /* In case the HCD restarted the timer, stop it again. */ |
541c7d43 | 2601 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1b42ae6d AS |
2602 | del_timer_sync(&hcd->rh_timer); |
2603 | ||
c5635437 | 2604 | if (usb_hcd_is_primary_hcd(hcd)) { |
cd70469d | 2605 | if (hcd->irq > 0) |
c5635437 SS |
2606 | free_irq(hcd->irq, hcd); |
2607 | } | |
6d88e679 AS |
2608 | |
2609 | usb_put_dev(hcd->self.root_hub); | |
1da177e4 LT |
2610 | usb_deregister_bus(&hcd->self); |
2611 | hcd_buffer_destroy(hcd); | |
2612 | } | |
782e70c6 | 2613 | EXPORT_SYMBOL_GPL(usb_remove_hcd); |
1da177e4 | 2614 | |
64a21d02 AG |
2615 | void |
2616 | usb_hcd_platform_shutdown(struct platform_device* dev) | |
2617 | { | |
2618 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
2619 | ||
2620 | if (hcd->driver->shutdown) | |
2621 | hcd->driver->shutdown(hcd); | |
2622 | } | |
782e70c6 | 2623 | EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); |
64a21d02 | 2624 | |
1da177e4 LT |
2625 | /*-------------------------------------------------------------------------*/ |
2626 | ||
f150fa1a | 2627 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
2628 | |
2629 | struct usb_mon_operations *mon_ops; | |
2630 | ||
2631 | /* | |
2632 | * The registration is unlocked. | |
2633 | * We do it this way because we do not want to lock in hot paths. | |
2634 | * | |
2635 | * Notice that the code is minimally error-proof. Because usbmon needs | |
2636 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. | |
2637 | */ | |
2638 | ||
2639 | int usb_mon_register (struct usb_mon_operations *ops) | |
2640 | { | |
2641 | ||
2642 | if (mon_ops) | |
2643 | return -EBUSY; | |
2644 | ||
2645 | mon_ops = ops; | |
2646 | mb(); | |
2647 | return 0; | |
2648 | } | |
2649 | EXPORT_SYMBOL_GPL (usb_mon_register); | |
2650 | ||
2651 | void usb_mon_deregister (void) | |
2652 | { | |
2653 | ||
2654 | if (mon_ops == NULL) { | |
2655 | printk(KERN_ERR "USB: monitor was not registered\n"); | |
2656 | return; | |
2657 | } | |
2658 | mon_ops = NULL; | |
2659 | mb(); | |
2660 | } | |
2661 | EXPORT_SYMBOL_GPL (usb_mon_deregister); | |
2662 | ||
f150fa1a | 2663 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |