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> | |
33 | #include <asm/scatterlist.h> | |
34 | #include <linux/device.h> | |
35 | #include <linux/dma-mapping.h> | |
4186ecf8 | 36 | #include <linux/mutex.h> |
1da177e4 LT |
37 | #include <asm/irq.h> |
38 | #include <asm/byteorder.h> | |
64a21d02 | 39 | #include <linux/platform_device.h> |
6b157c9b | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | |
42 | #include <linux/usb.h> | |
43 | ||
44 | #include "usb.h" | |
45 | #include "hcd.h" | |
46 | #include "hub.h" | |
47 | ||
48 | ||
1da177e4 LT |
49 | /*-------------------------------------------------------------------------*/ |
50 | ||
51 | /* | |
52 | * USB Host Controller Driver framework | |
53 | * | |
54 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing | |
55 | * HCD-specific behaviors/bugs. | |
56 | * | |
57 | * This does error checks, tracks devices and urbs, and delegates to a | |
58 | * "hc_driver" only for code (and data) that really needs to know about | |
59 | * hardware differences. That includes root hub registers, i/o queues, | |
60 | * and so on ... but as little else as possible. | |
61 | * | |
62 | * Shared code includes most of the "root hub" code (these are emulated, | |
63 | * though each HC's hardware works differently) and PCI glue, plus request | |
64 | * tracking overhead. The HCD code should only block on spinlocks or on | |
65 | * hardware handshaking; blocking on software events (such as other kernel | |
66 | * threads releasing resources, or completing actions) is all generic. | |
67 | * | |
68 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", | |
69 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used | |
70 | * only by the hub driver ... and that neither should be seen or used by | |
71 | * usb client device drivers. | |
72 | * | |
73 | * Contributors of ideas or unattributed patches include: David Brownell, | |
74 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... | |
75 | * | |
76 | * HISTORY: | |
77 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some | |
78 | * associated cleanup. "usb_hcd" still != "usb_bus". | |
79 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. | |
80 | */ | |
81 | ||
82 | /*-------------------------------------------------------------------------*/ | |
83 | ||
84 | /* host controllers we manage */ | |
85 | LIST_HEAD (usb_bus_list); | |
86 | EXPORT_SYMBOL_GPL (usb_bus_list); | |
87 | ||
88 | /* used when allocating bus numbers */ | |
89 | #define USB_MAXBUS 64 | |
90 | struct usb_busmap { | |
91 | unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; | |
92 | }; | |
93 | static struct usb_busmap busmap; | |
94 | ||
95 | /* used when updating list of hcds */ | |
4186ecf8 | 96 | DEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ |
1da177e4 LT |
97 | EXPORT_SYMBOL_GPL (usb_bus_list_lock); |
98 | ||
99 | /* used for controlling access to virtual root hubs */ | |
100 | static DEFINE_SPINLOCK(hcd_root_hub_lock); | |
101 | ||
102 | /* used when updating hcd data */ | |
103 | static DEFINE_SPINLOCK(hcd_data_lock); | |
104 | ||
105 | /* wait queue for synchronous unlinks */ | |
106 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); | |
107 | ||
108 | /*-------------------------------------------------------------------------*/ | |
109 | ||
110 | /* | |
111 | * Sharable chunks of root hub code. | |
112 | */ | |
113 | ||
114 | /*-------------------------------------------------------------------------*/ | |
115 | ||
116 | #define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) | |
117 | #define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) | |
118 | ||
119 | /* usb 2.0 root hub device descriptor */ | |
120 | static const u8 usb2_rh_dev_descriptor [18] = { | |
121 | 0x12, /* __u8 bLength; */ | |
122 | 0x01, /* __u8 bDescriptorType; Device */ | |
123 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ | |
124 | ||
125 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
126 | 0x00, /* __u8 bDeviceSubClass; */ | |
127 | 0x01, /* __u8 bDeviceProtocol; [ usb 2.0 single TT ]*/ | |
16f16d11 | 128 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 LT |
129 | |
130 | 0x00, 0x00, /* __le16 idVendor; */ | |
131 | 0x00, 0x00, /* __le16 idProduct; */ | |
132 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ | |
133 | ||
134 | 0x03, /* __u8 iManufacturer; */ | |
135 | 0x02, /* __u8 iProduct; */ | |
136 | 0x01, /* __u8 iSerialNumber; */ | |
137 | 0x01 /* __u8 bNumConfigurations; */ | |
138 | }; | |
139 | ||
140 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ | |
141 | ||
142 | /* usb 1.1 root hub device descriptor */ | |
143 | static const u8 usb11_rh_dev_descriptor [18] = { | |
144 | 0x12, /* __u8 bLength; */ | |
145 | 0x01, /* __u8 bDescriptorType; Device */ | |
146 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ | |
147 | ||
148 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
149 | 0x00, /* __u8 bDeviceSubClass; */ | |
150 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ | |
16f16d11 | 151 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 LT |
152 | |
153 | 0x00, 0x00, /* __le16 idVendor; */ | |
154 | 0x00, 0x00, /* __le16 idProduct; */ | |
155 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ | |
156 | ||
157 | 0x03, /* __u8 iManufacturer; */ | |
158 | 0x02, /* __u8 iProduct; */ | |
159 | 0x01, /* __u8 iSerialNumber; */ | |
160 | 0x01 /* __u8 bNumConfigurations; */ | |
161 | }; | |
162 | ||
163 | ||
164 | /*-------------------------------------------------------------------------*/ | |
165 | ||
166 | /* Configuration descriptors for our root hubs */ | |
167 | ||
168 | static const u8 fs_rh_config_descriptor [] = { | |
169 | ||
170 | /* one configuration */ | |
171 | 0x09, /* __u8 bLength; */ | |
172 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
173 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
174 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
175 | 0x01, /* __u8 bConfigurationValue; */ | |
176 | 0x00, /* __u8 iConfiguration; */ | |
177 | 0xc0, /* __u8 bmAttributes; | |
178 | Bit 7: must be set, | |
179 | 6: Self-powered, | |
180 | 5: Remote wakeup, | |
181 | 4..0: resvd */ | |
182 | 0x00, /* __u8 MaxPower; */ | |
183 | ||
184 | /* USB 1.1: | |
185 | * USB 2.0, single TT organization (mandatory): | |
186 | * one interface, protocol 0 | |
187 | * | |
188 | * USB 2.0, multiple TT organization (optional): | |
189 | * two interfaces, protocols 1 (like single TT) | |
190 | * and 2 (multiple TT mode) ... config is | |
191 | * sometimes settable | |
192 | * NOT IMPLEMENTED | |
193 | */ | |
194 | ||
195 | /* one interface */ | |
196 | 0x09, /* __u8 if_bLength; */ | |
197 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
198 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
199 | 0x00, /* __u8 if_bAlternateSetting; */ | |
200 | 0x01, /* __u8 if_bNumEndpoints; */ | |
201 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
202 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
203 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
204 | 0x00, /* __u8 if_iInterface; */ | |
205 | ||
206 | /* one endpoint (status change endpoint) */ | |
207 | 0x07, /* __u8 ep_bLength; */ | |
208 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
209 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
210 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
211 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ | |
212 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ | |
213 | }; | |
214 | ||
215 | static const u8 hs_rh_config_descriptor [] = { | |
216 | ||
217 | /* one configuration */ | |
218 | 0x09, /* __u8 bLength; */ | |
219 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
220 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
221 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
222 | 0x01, /* __u8 bConfigurationValue; */ | |
223 | 0x00, /* __u8 iConfiguration; */ | |
224 | 0xc0, /* __u8 bmAttributes; | |
225 | Bit 7: must be set, | |
226 | 6: Self-powered, | |
227 | 5: Remote wakeup, | |
228 | 4..0: resvd */ | |
229 | 0x00, /* __u8 MaxPower; */ | |
230 | ||
231 | /* USB 1.1: | |
232 | * USB 2.0, single TT organization (mandatory): | |
233 | * one interface, protocol 0 | |
234 | * | |
235 | * USB 2.0, multiple TT organization (optional): | |
236 | * two interfaces, protocols 1 (like single TT) | |
237 | * and 2 (multiple TT mode) ... config is | |
238 | * sometimes settable | |
239 | * NOT IMPLEMENTED | |
240 | */ | |
241 | ||
242 | /* one interface */ | |
243 | 0x09, /* __u8 if_bLength; */ | |
244 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
245 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
246 | 0x00, /* __u8 if_bAlternateSetting; */ | |
247 | 0x01, /* __u8 if_bNumEndpoints; */ | |
248 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
249 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
250 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
251 | 0x00, /* __u8 if_iInterface; */ | |
252 | ||
253 | /* one endpoint (status change endpoint) */ | |
254 | 0x07, /* __u8 ep_bLength; */ | |
255 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
256 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
257 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
88fafff9 | 258 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
259 | * see hub.c:hub_configure() for details. */ | |
260 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
1da177e4 LT |
261 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
262 | }; | |
263 | ||
264 | /*-------------------------------------------------------------------------*/ | |
265 | ||
266 | /* | |
267 | * helper routine for returning string descriptors in UTF-16LE | |
268 | * input can actually be ISO-8859-1; ASCII is its 7-bit subset | |
269 | */ | |
270 | static int ascii2utf (char *s, u8 *utf, int utfmax) | |
271 | { | |
272 | int retval; | |
273 | ||
274 | for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) { | |
275 | *utf++ = *s++; | |
276 | *utf++ = 0; | |
277 | } | |
278 | if (utfmax > 0) { | |
279 | *utf = *s; | |
280 | ++retval; | |
281 | } | |
282 | return retval; | |
283 | } | |
284 | ||
285 | /* | |
286 | * rh_string - provides manufacturer, product and serial strings for root hub | |
287 | * @id: the string ID number (1: serial number, 2: product, 3: vendor) | |
288 | * @hcd: the host controller for this root hub | |
289 | * @type: string describing our driver | |
290 | * @data: return packet in UTF-16 LE | |
291 | * @len: length of the return packet | |
292 | * | |
293 | * Produces either a manufacturer, product or serial number string for the | |
294 | * virtual root hub device. | |
295 | */ | |
296 | static int rh_string ( | |
297 | int id, | |
298 | struct usb_hcd *hcd, | |
299 | u8 *data, | |
300 | int len | |
301 | ) { | |
302 | char buf [100]; | |
303 | ||
304 | // language ids | |
305 | if (id == 0) { | |
306 | buf[0] = 4; buf[1] = 3; /* 4 bytes string data */ | |
307 | buf[2] = 0x09; buf[3] = 0x04; /* MSFT-speak for "en-us" */ | |
308 | len = min (len, 4); | |
309 | memcpy (data, buf, len); | |
310 | return len; | |
311 | ||
312 | // serial number | |
313 | } else if (id == 1) { | |
314 | strlcpy (buf, hcd->self.bus_name, sizeof buf); | |
315 | ||
316 | // product description | |
317 | } else if (id == 2) { | |
318 | strlcpy (buf, hcd->product_desc, sizeof buf); | |
319 | ||
320 | // id 3 == vendor description | |
321 | } else if (id == 3) { | |
96b644bd SH |
322 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
323 | init_utsname()->release, hcd->driver->description); | |
1da177e4 LT |
324 | |
325 | // unsupported IDs --> "protocol stall" | |
326 | } else | |
327 | return -EPIPE; | |
328 | ||
329 | switch (len) { /* All cases fall through */ | |
330 | default: | |
331 | len = 2 + ascii2utf (buf, data + 2, len - 2); | |
332 | case 2: | |
333 | data [1] = 3; /* type == string */ | |
334 | case 1: | |
335 | data [0] = 2 * (strlen (buf) + 1); | |
336 | case 0: | |
337 | ; /* Compiler wants a statement here */ | |
338 | } | |
339 | return len; | |
340 | } | |
341 | ||
342 | ||
343 | /* Root hub control transfers execute synchronously */ | |
344 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) | |
345 | { | |
346 | struct usb_ctrlrequest *cmd; | |
347 | u16 typeReq, wValue, wIndex, wLength; | |
348 | u8 *ubuf = urb->transfer_buffer; | |
54bee6e1 MP |
349 | u8 tbuf [sizeof (struct usb_hub_descriptor)] |
350 | __attribute__((aligned(4))); | |
1da177e4 LT |
351 | const u8 *bufp = tbuf; |
352 | int len = 0; | |
353 | int patch_wakeup = 0; | |
354 | unsigned long flags; | |
355 | int status = 0; | |
356 | int n; | |
357 | ||
358 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; | |
359 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; | |
360 | wValue = le16_to_cpu (cmd->wValue); | |
361 | wIndex = le16_to_cpu (cmd->wIndex); | |
362 | wLength = le16_to_cpu (cmd->wLength); | |
363 | ||
364 | if (wLength > urb->transfer_buffer_length) | |
365 | goto error; | |
366 | ||
367 | urb->actual_length = 0; | |
368 | switch (typeReq) { | |
369 | ||
370 | /* DEVICE REQUESTS */ | |
371 | ||
fb669cc0 DB |
372 | /* The root hub's remote wakeup enable bit is implemented using |
373 | * driver model wakeup flags. If this system supports wakeup | |
374 | * through USB, userspace may change the default "allow wakeup" | |
375 | * policy through sysfs or these calls. | |
376 | * | |
377 | * Most root hubs support wakeup from downstream devices, for | |
378 | * runtime power management (disabling USB clocks and reducing | |
379 | * VBUS power usage). However, not all of them do so; silicon, | |
380 | * board, and BIOS bugs here are not uncommon, so these can't | |
381 | * be treated quite like external hubs. | |
382 | * | |
383 | * Likewise, not all root hubs will pass wakeup events upstream, | |
384 | * to wake up the whole system. So don't assume root hub and | |
385 | * controller capabilities are identical. | |
386 | */ | |
387 | ||
1da177e4 | 388 | case DeviceRequest | USB_REQ_GET_STATUS: |
fb669cc0 DB |
389 | tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
390 | << USB_DEVICE_REMOTE_WAKEUP) | |
1da177e4 LT |
391 | | (1 << USB_DEVICE_SELF_POWERED); |
392 | tbuf [1] = 0; | |
393 | len = 2; | |
394 | break; | |
395 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: | |
396 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) | |
fb669cc0 | 397 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
1da177e4 LT |
398 | else |
399 | goto error; | |
400 | break; | |
401 | case DeviceOutRequest | USB_REQ_SET_FEATURE: | |
fb669cc0 DB |
402 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
403 | && wValue == USB_DEVICE_REMOTE_WAKEUP) | |
404 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); | |
1da177e4 LT |
405 | else |
406 | goto error; | |
407 | break; | |
408 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: | |
409 | tbuf [0] = 1; | |
410 | len = 1; | |
411 | /* FALLTHROUGH */ | |
412 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: | |
413 | break; | |
414 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
415 | switch (wValue & 0xff00) { | |
416 | case USB_DT_DEVICE << 8: | |
417 | if (hcd->driver->flags & HCD_USB2) | |
418 | bufp = usb2_rh_dev_descriptor; | |
419 | else if (hcd->driver->flags & HCD_USB11) | |
420 | bufp = usb11_rh_dev_descriptor; | |
421 | else | |
422 | goto error; | |
423 | len = 18; | |
424 | break; | |
425 | case USB_DT_CONFIG << 8: | |
426 | if (hcd->driver->flags & HCD_USB2) { | |
427 | bufp = hs_rh_config_descriptor; | |
428 | len = sizeof hs_rh_config_descriptor; | |
429 | } else { | |
430 | bufp = fs_rh_config_descriptor; | |
431 | len = sizeof fs_rh_config_descriptor; | |
432 | } | |
fb669cc0 | 433 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
434 | patch_wakeup = 1; |
435 | break; | |
436 | case USB_DT_STRING << 8: | |
437 | n = rh_string (wValue & 0xff, hcd, ubuf, wLength); | |
438 | if (n < 0) | |
439 | goto error; | |
440 | urb->actual_length = n; | |
441 | break; | |
442 | default: | |
443 | goto error; | |
444 | } | |
445 | break; | |
446 | case DeviceRequest | USB_REQ_GET_INTERFACE: | |
447 | tbuf [0] = 0; | |
448 | len = 1; | |
449 | /* FALLTHROUGH */ | |
450 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: | |
451 | break; | |
452 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: | |
453 | // wValue == urb->dev->devaddr | |
454 | dev_dbg (hcd->self.controller, "root hub device address %d\n", | |
455 | wValue); | |
456 | break; | |
457 | ||
458 | /* INTERFACE REQUESTS (no defined feature/status flags) */ | |
459 | ||
460 | /* ENDPOINT REQUESTS */ | |
461 | ||
462 | case EndpointRequest | USB_REQ_GET_STATUS: | |
463 | // ENDPOINT_HALT flag | |
464 | tbuf [0] = 0; | |
465 | tbuf [1] = 0; | |
466 | len = 2; | |
467 | /* FALLTHROUGH */ | |
468 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: | |
469 | case EndpointOutRequest | USB_REQ_SET_FEATURE: | |
470 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); | |
471 | break; | |
472 | ||
473 | /* CLASS REQUESTS (and errors) */ | |
474 | ||
475 | default: | |
476 | /* non-generic request */ | |
b13296c6 DB |
477 | switch (typeReq) { |
478 | case GetHubStatus: | |
479 | case GetPortStatus: | |
480 | len = 4; | |
481 | break; | |
482 | case GetHubDescriptor: | |
483 | len = sizeof (struct usb_hub_descriptor); | |
484 | break; | |
1da177e4 | 485 | } |
b13296c6 DB |
486 | status = hcd->driver->hub_control (hcd, |
487 | typeReq, wValue, wIndex, | |
488 | tbuf, wLength); | |
1da177e4 LT |
489 | break; |
490 | error: | |
491 | /* "protocol stall" on error */ | |
492 | status = -EPIPE; | |
493 | } | |
494 | ||
495 | if (status) { | |
496 | len = 0; | |
497 | if (status != -EPIPE) { | |
498 | dev_dbg (hcd->self.controller, | |
499 | "CTRL: TypeReq=0x%x val=0x%x " | |
500 | "idx=0x%x len=%d ==> %d\n", | |
501 | typeReq, wValue, wIndex, | |
b13296c6 | 502 | wLength, status); |
1da177e4 LT |
503 | } |
504 | } | |
505 | if (len) { | |
506 | if (urb->transfer_buffer_length < len) | |
507 | len = urb->transfer_buffer_length; | |
508 | urb->actual_length = len; | |
509 | // always USB_DIR_IN, toward host | |
510 | memcpy (ubuf, bufp, len); | |
511 | ||
512 | /* report whether RH hardware supports remote wakeup */ | |
513 | if (patch_wakeup && | |
514 | len > offsetof (struct usb_config_descriptor, | |
515 | bmAttributes)) | |
516 | ((struct usb_config_descriptor *)ubuf)->bmAttributes | |
517 | |= USB_CONFIG_ATT_WAKEUP; | |
518 | } | |
519 | ||
520 | /* any errors get returned through the urb completion */ | |
521 | local_irq_save (flags); | |
522 | spin_lock (&urb->lock); | |
523 | if (urb->status == -EINPROGRESS) | |
524 | urb->status = status; | |
525 | spin_unlock (&urb->lock); | |
7d12e780 | 526 | usb_hcd_giveback_urb (hcd, urb); |
1da177e4 LT |
527 | local_irq_restore (flags); |
528 | return 0; | |
529 | } | |
530 | ||
531 | /*-------------------------------------------------------------------------*/ | |
532 | ||
533 | /* | |
d5926ae7 AS |
534 | * Root Hub interrupt transfers are polled using a timer if the |
535 | * driver requests it; otherwise the driver is responsible for | |
536 | * calling usb_hcd_poll_rh_status() when an event occurs. | |
1da177e4 | 537 | * |
d5926ae7 AS |
538 | * Completions are called in_interrupt(), but they may or may not |
539 | * be in_irq(). | |
1da177e4 | 540 | */ |
d5926ae7 AS |
541 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
542 | { | |
543 | struct urb *urb; | |
544 | int length; | |
545 | unsigned long flags; | |
546 | char buffer[4]; /* Any root hubs with > 31 ports? */ | |
1da177e4 | 547 | |
1b42ae6d AS |
548 | if (unlikely(!hcd->rh_registered)) |
549 | return; | |
d5926ae7 AS |
550 | if (!hcd->uses_new_polling && !hcd->status_urb) |
551 | return; | |
1da177e4 | 552 | |
d5926ae7 AS |
553 | length = hcd->driver->hub_status_data(hcd, buffer); |
554 | if (length > 0) { | |
1da177e4 | 555 | |
d5926ae7 AS |
556 | /* try to complete the status urb */ |
557 | local_irq_save (flags); | |
558 | spin_lock(&hcd_root_hub_lock); | |
559 | urb = hcd->status_urb; | |
560 | if (urb) { | |
561 | spin_lock(&urb->lock); | |
562 | if (urb->status == -EINPROGRESS) { | |
563 | hcd->poll_pending = 0; | |
564 | hcd->status_urb = NULL; | |
565 | urb->status = 0; | |
566 | urb->hcpriv = NULL; | |
567 | urb->actual_length = length; | |
568 | memcpy(urb->transfer_buffer, buffer, length); | |
569 | } else /* urb has been unlinked */ | |
570 | length = 0; | |
571 | spin_unlock(&urb->lock); | |
572 | } else | |
573 | length = 0; | |
574 | spin_unlock(&hcd_root_hub_lock); | |
575 | ||
576 | /* local irqs are always blocked in completions */ | |
577 | if (length > 0) | |
7d12e780 | 578 | usb_hcd_giveback_urb (hcd, urb); |
d5926ae7 AS |
579 | else |
580 | hcd->poll_pending = 1; | |
581 | local_irq_restore (flags); | |
1da177e4 LT |
582 | } |
583 | ||
d5926ae7 AS |
584 | /* The USB 2.0 spec says 256 ms. This is close enough and won't |
585 | * exceed that limit if HZ is 100. */ | |
586 | if (hcd->uses_new_polling ? hcd->poll_rh : | |
587 | (length == 0 && hcd->status_urb != NULL)) | |
588 | mod_timer (&hcd->rh_timer, jiffies + msecs_to_jiffies(250)); | |
1da177e4 | 589 | } |
d5926ae7 | 590 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
1da177e4 LT |
591 | |
592 | /* timer callback */ | |
d5926ae7 AS |
593 | static void rh_timer_func (unsigned long _hcd) |
594 | { | |
595 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); | |
596 | } | |
597 | ||
598 | /*-------------------------------------------------------------------------*/ | |
1da177e4 | 599 | |
d5926ae7 | 600 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
1da177e4 | 601 | { |
d5926ae7 | 602 | int retval; |
1da177e4 | 603 | unsigned long flags; |
d5926ae7 | 604 | int len = 1 + (urb->dev->maxchild / 8); |
1da177e4 | 605 | |
d5926ae7 AS |
606 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
607 | if (urb->status != -EINPROGRESS) /* already unlinked */ | |
608 | retval = urb->status; | |
609 | else if (hcd->status_urb || urb->transfer_buffer_length < len) { | |
610 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); | |
611 | retval = -EINVAL; | |
612 | } else { | |
613 | hcd->status_urb = urb; | |
614 | urb->hcpriv = hcd; /* indicate it's queued */ | |
1da177e4 | 615 | |
d5926ae7 AS |
616 | if (!hcd->uses_new_polling) |
617 | mod_timer (&hcd->rh_timer, jiffies + | |
618 | msecs_to_jiffies(250)); | |
1da177e4 | 619 | |
d5926ae7 AS |
620 | /* If a status change has already occurred, report it ASAP */ |
621 | else if (hcd->poll_pending) | |
622 | mod_timer (&hcd->rh_timer, jiffies); | |
623 | retval = 0; | |
1da177e4 | 624 | } |
d5926ae7 AS |
625 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
626 | return retval; | |
1da177e4 LT |
627 | } |
628 | ||
1da177e4 LT |
629 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
630 | { | |
d5926ae7 AS |
631 | if (usb_pipeint (urb->pipe)) |
632 | return rh_queue_status (hcd, urb); | |
1da177e4 LT |
633 | if (usb_pipecontrol (urb->pipe)) |
634 | return rh_call_control (hcd, urb); | |
d5926ae7 | 635 | return -EINVAL; |
1da177e4 LT |
636 | } |
637 | ||
638 | /*-------------------------------------------------------------------------*/ | |
639 | ||
455b25fb AS |
640 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
641 | * since these URBs always execute synchronously. | |
d5926ae7 | 642 | */ |
1da177e4 LT |
643 | static int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) |
644 | { | |
455b25fb | 645 | unsigned long flags; |
1da177e4 | 646 | |
455b25fb AS |
647 | if (usb_pipeendpoint(urb->pipe) == 0) { /* Control URB */ |
648 | ; /* Do nothing */ | |
d5926ae7 AS |
649 | |
650 | } else { /* Status URB */ | |
651 | if (!hcd->uses_new_polling) | |
455b25fb AS |
652 | del_timer (&hcd->rh_timer); |
653 | local_irq_save (flags); | |
d5926ae7 AS |
654 | spin_lock (&hcd_root_hub_lock); |
655 | if (urb == hcd->status_urb) { | |
656 | hcd->status_urb = NULL; | |
657 | urb->hcpriv = NULL; | |
658 | } else | |
659 | urb = NULL; /* wasn't fully queued */ | |
660 | spin_unlock (&hcd_root_hub_lock); | |
661 | if (urb) | |
7d12e780 | 662 | usb_hcd_giveback_urb (hcd, urb); |
455b25fb | 663 | local_irq_restore (flags); |
d5926ae7 | 664 | } |
1da177e4 LT |
665 | |
666 | return 0; | |
667 | } | |
668 | ||
669 | /*-------------------------------------------------------------------------*/ | |
670 | ||
8561b10f | 671 | static struct class *usb_host_class; |
1da177e4 LT |
672 | |
673 | int usb_host_init(void) | |
674 | { | |
8561b10f | 675 | int retval = 0; |
676 | ||
677 | usb_host_class = class_create(THIS_MODULE, "usb_host"); | |
678 | if (IS_ERR(usb_host_class)) | |
679 | retval = PTR_ERR(usb_host_class); | |
680 | return retval; | |
1da177e4 LT |
681 | } |
682 | ||
683 | void usb_host_cleanup(void) | |
684 | { | |
8561b10f | 685 | class_destroy(usb_host_class); |
1da177e4 LT |
686 | } |
687 | ||
688 | /** | |
689 | * usb_bus_init - shared initialization code | |
690 | * @bus: the bus structure being initialized | |
691 | * | |
692 | * This code is used to initialize a usb_bus structure, memory for which is | |
693 | * separately managed. | |
694 | */ | |
695 | static void usb_bus_init (struct usb_bus *bus) | |
696 | { | |
697 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); | |
698 | ||
699 | bus->devnum_next = 1; | |
700 | ||
701 | bus->root_hub = NULL; | |
1da177e4 LT |
702 | bus->busnum = -1; |
703 | bus->bandwidth_allocated = 0; | |
704 | bus->bandwidth_int_reqs = 0; | |
705 | bus->bandwidth_isoc_reqs = 0; | |
706 | ||
707 | INIT_LIST_HEAD (&bus->bus_list); | |
1da177e4 LT |
708 | } |
709 | ||
1da177e4 LT |
710 | /*-------------------------------------------------------------------------*/ |
711 | ||
712 | /** | |
713 | * usb_register_bus - registers the USB host controller with the usb core | |
714 | * @bus: pointer to the bus to register | |
715 | * Context: !in_interrupt() | |
716 | * | |
717 | * Assigns a bus number, and links the controller into usbcore data | |
718 | * structures so that it can be seen by scanning the bus list. | |
719 | */ | |
720 | static int usb_register_bus(struct usb_bus *bus) | |
721 | { | |
722 | int busnum; | |
1da177e4 | 723 | |
4186ecf8 | 724 | mutex_lock(&usb_bus_list_lock); |
1da177e4 LT |
725 | busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); |
726 | if (busnum < USB_MAXBUS) { | |
727 | set_bit (busnum, busmap.busmap); | |
728 | bus->busnum = busnum; | |
729 | } else { | |
730 | printk (KERN_ERR "%s: too many buses\n", usbcore_name); | |
4186ecf8 | 731 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
732 | return -E2BIG; |
733 | } | |
734 | ||
53f46542 GKH |
735 | bus->class_dev = class_device_create(usb_host_class, NULL, MKDEV(0,0), |
736 | bus->controller, "usb_host%d", busnum); | |
8561b10f | 737 | if (IS_ERR(bus->class_dev)) { |
1da177e4 | 738 | clear_bit(busnum, busmap.busmap); |
4186ecf8 | 739 | mutex_unlock(&usb_bus_list_lock); |
8561b10f | 740 | return PTR_ERR(bus->class_dev); |
1da177e4 LT |
741 | } |
742 | ||
8561b10f | 743 | class_set_devdata(bus->class_dev, bus); |
744 | ||
1da177e4 LT |
745 | /* Add it to the local list of buses */ |
746 | list_add (&bus->bus_list, &usb_bus_list); | |
4186ecf8 | 747 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 748 | |
3099e75a | 749 | usb_notify_add_bus(bus); |
1da177e4 LT |
750 | |
751 | dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum); | |
752 | return 0; | |
753 | } | |
754 | ||
755 | /** | |
756 | * usb_deregister_bus - deregisters the USB host controller | |
757 | * @bus: pointer to the bus to deregister | |
758 | * Context: !in_interrupt() | |
759 | * | |
760 | * Recycles the bus number, and unlinks the controller from usbcore data | |
761 | * structures so that it won't be seen by scanning the bus list. | |
762 | */ | |
763 | static void usb_deregister_bus (struct usb_bus *bus) | |
764 | { | |
765 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); | |
766 | ||
767 | /* | |
768 | * NOTE: make sure that all the devices are removed by the | |
769 | * controller code, as well as having it call this when cleaning | |
770 | * itself up | |
771 | */ | |
4186ecf8 | 772 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 773 | list_del (&bus->bus_list); |
4186ecf8 | 774 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 775 | |
3099e75a | 776 | usb_notify_remove_bus(bus); |
1da177e4 LT |
777 | |
778 | clear_bit (bus->busnum, busmap.busmap); | |
779 | ||
8561b10f | 780 | class_device_unregister(bus->class_dev); |
1da177e4 LT |
781 | } |
782 | ||
783 | /** | |
8ec8d20b | 784 | * register_root_hub - called by usb_add_hcd() to register a root hub |
1da177e4 LT |
785 | * @hcd: host controller for this root hub |
786 | * | |
8ec8d20b | 787 | * This function registers the root hub with the USB subsystem. It sets up |
b1e8f0a6 DB |
788 | * the device properly in the device tree and then calls usb_new_device() |
789 | * to register the usb device. It also assigns the root hub's USB address | |
790 | * (always 1). | |
1da177e4 | 791 | */ |
b1e8f0a6 | 792 | static int register_root_hub(struct usb_hcd *hcd) |
1da177e4 LT |
793 | { |
794 | struct device *parent_dev = hcd->self.controller; | |
b1e8f0a6 | 795 | struct usb_device *usb_dev = hcd->self.root_hub; |
1da177e4 LT |
796 | const int devnum = 1; |
797 | int retval; | |
798 | ||
1da177e4 LT |
799 | usb_dev->devnum = devnum; |
800 | usb_dev->bus->devnum_next = devnum + 1; | |
801 | memset (&usb_dev->bus->devmap.devicemap, 0, | |
802 | sizeof usb_dev->bus->devmap.devicemap); | |
803 | set_bit (devnum, usb_dev->bus->devmap.devicemap); | |
804 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); | |
805 | ||
4186ecf8 | 806 | mutex_lock(&usb_bus_list_lock); |
1da177e4 LT |
807 | |
808 | usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); | |
809 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); | |
810 | if (retval != sizeof usb_dev->descriptor) { | |
4186ecf8 | 811 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
812 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
813 | usb_dev->dev.bus_id, retval); | |
814 | return (retval < 0) ? retval : -EMSGSIZE; | |
815 | } | |
816 | ||
1da177e4 | 817 | retval = usb_new_device (usb_dev); |
1da177e4 | 818 | if (retval) { |
1da177e4 LT |
819 | dev_err (parent_dev, "can't register root hub for %s, %d\n", |
820 | usb_dev->dev.bus_id, retval); | |
821 | } | |
4186ecf8 | 822 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
823 | |
824 | if (retval == 0) { | |
825 | spin_lock_irq (&hcd_root_hub_lock); | |
826 | hcd->rh_registered = 1; | |
827 | spin_unlock_irq (&hcd_root_hub_lock); | |
828 | ||
829 | /* Did the HC die before the root hub was registered? */ | |
830 | if (hcd->state == HC_STATE_HALT) | |
831 | usb_hc_died (hcd); /* This time clean up */ | |
832 | } | |
833 | ||
834 | return retval; | |
835 | } | |
1da177e4 | 836 | |
d5926ae7 AS |
837 | void usb_enable_root_hub_irq (struct usb_bus *bus) |
838 | { | |
839 | struct usb_hcd *hcd; | |
840 | ||
841 | hcd = container_of (bus, struct usb_hcd, self); | |
d19ac7da | 842 | if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT) |
d5926ae7 AS |
843 | hcd->driver->hub_irq_enable (hcd); |
844 | } | |
845 | ||
1da177e4 LT |
846 | |
847 | /*-------------------------------------------------------------------------*/ | |
848 | ||
849 | /** | |
850 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds | |
851 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} | |
852 | * @is_input: true iff the transaction sends data to the host | |
853 | * @isoc: true for isochronous transactions, false for interrupt ones | |
854 | * @bytecount: how many bytes in the transaction. | |
855 | * | |
856 | * Returns approximate bus time in nanoseconds for a periodic transaction. | |
857 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be | |
858 | * scheduled in software, this function is only used for such scheduling. | |
859 | */ | |
860 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) | |
861 | { | |
862 | unsigned long tmp; | |
863 | ||
864 | switch (speed) { | |
865 | case USB_SPEED_LOW: /* INTR only */ | |
866 | if (is_input) { | |
867 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
868 | return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); | |
869 | } else { | |
870 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
871 | return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); | |
872 | } | |
873 | case USB_SPEED_FULL: /* ISOC or INTR */ | |
874 | if (isoc) { | |
875 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
876 | return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); | |
877 | } else { | |
878 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
879 | return (9107L + BW_HOST_DELAY + tmp); | |
880 | } | |
881 | case USB_SPEED_HIGH: /* ISOC or INTR */ | |
882 | // FIXME adjust for input vs output | |
883 | if (isoc) | |
498f78e6 | 884 | tmp = HS_NSECS_ISO (bytecount); |
1da177e4 | 885 | else |
498f78e6 | 886 | tmp = HS_NSECS (bytecount); |
1da177e4 LT |
887 | return tmp; |
888 | default: | |
889 | pr_debug ("%s: bogus device speed!\n", usbcore_name); | |
890 | return -1; | |
891 | } | |
892 | } | |
893 | EXPORT_SYMBOL (usb_calc_bus_time); | |
894 | ||
1da177e4 LT |
895 | |
896 | /*-------------------------------------------------------------------------*/ | |
897 | ||
898 | /* | |
899 | * Generic HC operations. | |
900 | */ | |
901 | ||
902 | /*-------------------------------------------------------------------------*/ | |
903 | ||
904 | static void urb_unlink (struct urb *urb) | |
905 | { | |
906 | unsigned long flags; | |
907 | ||
1da177e4 LT |
908 | /* clear all state linking urb to this dev (and hcd) */ |
909 | ||
910 | spin_lock_irqsave (&hcd_data_lock, flags); | |
911 | list_del_init (&urb->urb_list); | |
912 | spin_unlock_irqrestore (&hcd_data_lock, flags); | |
1da177e4 LT |
913 | } |
914 | ||
915 | ||
916 | /* may be called in any context with a valid urb->dev usecount | |
917 | * caller surrenders "ownership" of urb | |
918 | * expects usb_submit_urb() to have sanity checked and conditioned all | |
919 | * inputs in the urb | |
920 | */ | |
a6d2bb9f | 921 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) |
1da177e4 LT |
922 | { |
923 | int status; | |
17200583 | 924 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); |
1da177e4 LT |
925 | struct usb_host_endpoint *ep; |
926 | unsigned long flags; | |
927 | ||
928 | if (!hcd) | |
929 | return -ENODEV; | |
930 | ||
931 | usbmon_urb_submit(&hcd->self, urb); | |
932 | ||
933 | /* | |
934 | * Atomically queue the urb, first to our records, then to the HCD. | |
935 | * Access to urb->status is controlled by urb->lock ... changes on | |
936 | * i/o completion (normal or fault) or unlinking. | |
937 | */ | |
938 | ||
939 | // FIXME: verify that quiescing hc works right (RH cleans up) | |
940 | ||
941 | spin_lock_irqsave (&hcd_data_lock, flags); | |
942 | ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) | |
943 | [usb_pipeendpoint(urb->pipe)]; | |
944 | if (unlikely (!ep)) | |
945 | status = -ENOENT; | |
946 | else if (unlikely (urb->reject)) | |
947 | status = -EPERM; | |
948 | else switch (hcd->state) { | |
949 | case HC_STATE_RUNNING: | |
950 | case HC_STATE_RESUMING: | |
979d5199 | 951 | doit: |
1da177e4 LT |
952 | list_add_tail (&urb->urb_list, &ep->urb_list); |
953 | status = 0; | |
954 | break; | |
979d5199 DB |
955 | case HC_STATE_SUSPENDED: |
956 | /* HC upstream links (register access, wakeup signaling) can work | |
957 | * even when the downstream links (and DMA etc) are quiesced; let | |
958 | * usbcore talk to the root hub. | |
959 | */ | |
960 | if (hcd->self.controller->power.power_state.event == PM_EVENT_ON | |
961 | && urb->dev->parent == NULL) | |
962 | goto doit; | |
963 | /* FALL THROUGH */ | |
1da177e4 LT |
964 | default: |
965 | status = -ESHUTDOWN; | |
966 | break; | |
967 | } | |
968 | spin_unlock_irqrestore (&hcd_data_lock, flags); | |
969 | if (status) { | |
970 | INIT_LIST_HEAD (&urb->urb_list); | |
971 | usbmon_urb_submit_error(&hcd->self, urb, status); | |
972 | return status; | |
973 | } | |
974 | ||
975 | /* increment urb's reference count as part of giving it to the HCD | |
976 | * (which now controls it). HCD guarantees that it either returns | |
977 | * an error or calls giveback(), but not both. | |
978 | */ | |
979 | urb = usb_get_urb (urb); | |
980 | atomic_inc (&urb->use_count); | |
981 | ||
982 | if (urb->dev == hcd->self.root_hub) { | |
983 | /* NOTE: requirement on hub callers (usbfs and the hub | |
984 | * driver, for now) that URBs' urb->transfer_buffer be | |
985 | * valid and usb_buffer_{sync,unmap}() not be needed, since | |
986 | * they could clobber root hub response data. | |
987 | */ | |
988 | status = rh_urb_enqueue (hcd, urb); | |
989 | goto done; | |
990 | } | |
991 | ||
992 | /* lower level hcd code should use *_dma exclusively, | |
993 | * unless it uses pio or talks to another transport. | |
994 | */ | |
dd990f16 | 995 | if (hcd->self.uses_dma) { |
1da177e4 LT |
996 | if (usb_pipecontrol (urb->pipe) |
997 | && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) | |
998 | urb->setup_dma = dma_map_single ( | |
999 | hcd->self.controller, | |
1000 | urb->setup_packet, | |
1001 | sizeof (struct usb_ctrlrequest), | |
1002 | DMA_TO_DEVICE); | |
1003 | if (urb->transfer_buffer_length != 0 | |
1004 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) | |
1005 | urb->transfer_dma = dma_map_single ( | |
1006 | hcd->self.controller, | |
1007 | urb->transfer_buffer, | |
1008 | urb->transfer_buffer_length, | |
1009 | usb_pipein (urb->pipe) | |
1010 | ? DMA_FROM_DEVICE | |
1011 | : DMA_TO_DEVICE); | |
1012 | } | |
1013 | ||
1014 | status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); | |
1015 | done: | |
1016 | if (unlikely (status)) { | |
1017 | urb_unlink (urb); | |
1018 | atomic_dec (&urb->use_count); | |
1019 | if (urb->reject) | |
1020 | wake_up (&usb_kill_urb_queue); | |
1da177e4 | 1021 | usbmon_urb_submit_error(&hcd->self, urb, status); |
d984abc9 | 1022 | usb_put_urb (urb); |
1da177e4 LT |
1023 | } |
1024 | return status; | |
1025 | } | |
1026 | ||
1027 | /*-------------------------------------------------------------------------*/ | |
1028 | ||
1029 | /* called in any context */ | |
a6d2bb9f | 1030 | int usb_hcd_get_frame_number (struct usb_device *udev) |
1da177e4 | 1031 | { |
17200583 AS |
1032 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
1033 | ||
1da177e4 LT |
1034 | if (!HC_IS_RUNNING (hcd->state)) |
1035 | return -ESHUTDOWN; | |
1036 | return hcd->driver->get_frame_number (hcd); | |
1037 | } | |
1038 | ||
1039 | /*-------------------------------------------------------------------------*/ | |
1040 | ||
1041 | /* this makes the hcd giveback() the urb more quickly, by kicking it | |
1042 | * off hardware queues (which may take a while) and returning it as | |
1043 | * soon as practical. we've already set up the urb's return status, | |
1044 | * but we can't know if the callback completed already. | |
1045 | */ | |
1046 | static int | |
1047 | unlink1 (struct usb_hcd *hcd, struct urb *urb) | |
1048 | { | |
1049 | int value; | |
1050 | ||
1051 | if (urb->dev == hcd->self.root_hub) | |
1052 | value = usb_rh_urb_dequeue (hcd, urb); | |
1053 | else { | |
1054 | ||
1055 | /* The only reason an HCD might fail this call is if | |
1056 | * it has not yet fully queued the urb to begin with. | |
1057 | * Such failures should be harmless. */ | |
1058 | value = hcd->driver->urb_dequeue (hcd, urb); | |
1059 | } | |
1060 | ||
1061 | if (value != 0) | |
1062 | dev_dbg (hcd->self.controller, "dequeue %p --> %d\n", | |
1063 | urb, value); | |
1064 | return value; | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * called in any context | |
1069 | * | |
1070 | * caller guarantees urb won't be recycled till both unlink() | |
1071 | * and the urb's completion function return | |
1072 | */ | |
a6d2bb9f | 1073 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
1da177e4 LT |
1074 | { |
1075 | struct usb_host_endpoint *ep; | |
1076 | struct usb_hcd *hcd = NULL; | |
1077 | struct device *sys = NULL; | |
1078 | unsigned long flags; | |
1079 | struct list_head *tmp; | |
1080 | int retval; | |
1081 | ||
1082 | if (!urb) | |
1083 | return -EINVAL; | |
1084 | if (!urb->dev || !urb->dev->bus) | |
1085 | return -ENODEV; | |
1086 | ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) | |
1087 | [usb_pipeendpoint(urb->pipe)]; | |
1088 | if (!ep) | |
1089 | return -ENODEV; | |
1090 | ||
1091 | /* | |
1092 | * we contend for urb->status with the hcd core, | |
1093 | * which changes it while returning the urb. | |
1094 | * | |
1095 | * Caller guaranteed that the urb pointer hasn't been freed, and | |
1096 | * that it was submitted. But as a rule it can't know whether or | |
1097 | * not it's already been unlinked ... so we respect the reversed | |
1098 | * lock sequence needed for the usb_hcd_giveback_urb() code paths | |
1099 | * (urb lock, then hcd_data_lock) in case some other CPU is now | |
1100 | * unlinking it. | |
1101 | */ | |
1102 | spin_lock_irqsave (&urb->lock, flags); | |
1103 | spin_lock (&hcd_data_lock); | |
1104 | ||
1105 | sys = &urb->dev->dev; | |
17200583 | 1106 | hcd = bus_to_hcd(urb->dev->bus); |
1da177e4 LT |
1107 | if (hcd == NULL) { |
1108 | retval = -ENODEV; | |
1109 | goto done; | |
1110 | } | |
1111 | ||
1da177e4 LT |
1112 | /* insist the urb is still queued */ |
1113 | list_for_each(tmp, &ep->urb_list) { | |
1114 | if (tmp == &urb->urb_list) | |
1115 | break; | |
1116 | } | |
1117 | if (tmp != &urb->urb_list) { | |
1118 | retval = -EIDRM; | |
1119 | goto done; | |
1120 | } | |
1121 | ||
1122 | /* Any status except -EINPROGRESS means something already started to | |
1123 | * unlink this URB from the hardware. So there's no more work to do. | |
1124 | */ | |
1125 | if (urb->status != -EINPROGRESS) { | |
1126 | retval = -EBUSY; | |
1127 | goto done; | |
1128 | } | |
1129 | ||
1130 | /* IRQ setup can easily be broken so that USB controllers | |
1131 | * never get completion IRQs ... maybe even the ones we need to | |
1132 | * finish unlinking the initial failed usb_set_address() | |
1133 | * or device descriptor fetch. | |
1134 | */ | |
8de98402 BH |
1135 | if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags) |
1136 | && hcd->self.root_hub != urb->dev) { | |
1da177e4 LT |
1137 | dev_warn (hcd->self.controller, "Unlink after no-IRQ? " |
1138 | "Controller is probably using the wrong IRQ." | |
1139 | "\n"); | |
8de98402 | 1140 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | urb->status = status; | |
1144 | ||
1145 | spin_unlock (&hcd_data_lock); | |
1146 | spin_unlock_irqrestore (&urb->lock, flags); | |
1147 | ||
1148 | retval = unlink1 (hcd, urb); | |
1149 | if (retval == 0) | |
1150 | retval = -EINPROGRESS; | |
1151 | return retval; | |
1152 | ||
1153 | done: | |
1154 | spin_unlock (&hcd_data_lock); | |
1155 | spin_unlock_irqrestore (&urb->lock, flags); | |
1156 | if (retval != -EIDRM && sys && sys->driver) | |
1157 | dev_dbg (sys, "hcd_unlink_urb %p fail %d\n", urb, retval); | |
1158 | return retval; | |
1159 | } | |
1160 | ||
1161 | /*-------------------------------------------------------------------------*/ | |
1162 | ||
1163 | /* disables the endpoint: cancels any pending urbs, then synchronizes with | |
455b25fb AS |
1164 | * the hcd to make sure all endpoint state is gone from hardware, and then |
1165 | * waits until the endpoint's queue is completely drained. use for | |
1da177e4 LT |
1166 | * set_configuration, set_interface, driver removal, physical disconnect. |
1167 | * | |
1168 | * example: a qh stored in ep->hcpriv, holding state related to endpoint | |
1169 | * type, maxpacket size, toggle, halt status, and scheduling. | |
1170 | */ | |
a6d2bb9f AS |
1171 | void usb_hcd_endpoint_disable (struct usb_device *udev, |
1172 | struct usb_host_endpoint *ep) | |
1da177e4 LT |
1173 | { |
1174 | struct usb_hcd *hcd; | |
1175 | struct urb *urb; | |
1176 | ||
17200583 | 1177 | hcd = bus_to_hcd(udev->bus); |
1da177e4 LT |
1178 | local_irq_disable (); |
1179 | ||
1da177e4 LT |
1180 | /* ep is already gone from udev->ep_{in,out}[]; no more submits */ |
1181 | rescan: | |
1182 | spin_lock (&hcd_data_lock); | |
1183 | list_for_each_entry (urb, &ep->urb_list, urb_list) { | |
1184 | int tmp; | |
1185 | ||
455b25fb | 1186 | /* the urb may already have been unlinked */ |
1da177e4 LT |
1187 | if (urb->status != -EINPROGRESS) |
1188 | continue; | |
1189 | usb_get_urb (urb); | |
1190 | spin_unlock (&hcd_data_lock); | |
1191 | ||
1192 | spin_lock (&urb->lock); | |
1193 | tmp = urb->status; | |
1194 | if (tmp == -EINPROGRESS) | |
1195 | urb->status = -ESHUTDOWN; | |
1196 | spin_unlock (&urb->lock); | |
1197 | ||
1198 | /* kick hcd unless it's already returning this */ | |
1199 | if (tmp == -EINPROGRESS) { | |
1200 | tmp = urb->pipe; | |
1201 | unlink1 (hcd, urb); | |
1202 | dev_dbg (hcd->self.controller, | |
1203 | "shutdown urb %p pipe %08x ep%d%s%s\n", | |
1204 | urb, tmp, usb_pipeendpoint (tmp), | |
1205 | (tmp & USB_DIR_IN) ? "in" : "out", | |
1206 | ({ char *s; \ | |
1207 | switch (usb_pipetype (tmp)) { \ | |
1208 | case PIPE_CONTROL: s = ""; break; \ | |
1209 | case PIPE_BULK: s = "-bulk"; break; \ | |
1210 | case PIPE_INTERRUPT: s = "-intr"; break; \ | |
1211 | default: s = "-iso"; break; \ | |
1212 | }; s;})); | |
1213 | } | |
1214 | usb_put_urb (urb); | |
1215 | ||
1216 | /* list contents may have changed */ | |
1217 | goto rescan; | |
1218 | } | |
1219 | spin_unlock (&hcd_data_lock); | |
1220 | local_irq_enable (); | |
1221 | ||
1222 | /* synchronize with the hardware, so old configuration state | |
1223 | * clears out immediately (and will be freed). | |
1224 | */ | |
1225 | might_sleep (); | |
1226 | if (hcd->driver->endpoint_disable) | |
1227 | hcd->driver->endpoint_disable (hcd, ep); | |
455b25fb AS |
1228 | |
1229 | /* Wait until the endpoint queue is completely empty. Most HCDs | |
1230 | * will have done this already in their endpoint_disable method, | |
1231 | * but some might not. And there could be root-hub control URBs | |
1232 | * still pending since they aren't affected by the HCDs' | |
1233 | * endpoint_disable methods. | |
1234 | */ | |
1235 | while (!list_empty (&ep->urb_list)) { | |
1236 | spin_lock_irq (&hcd_data_lock); | |
1237 | ||
1238 | /* The list may have changed while we acquired the spinlock */ | |
1239 | urb = NULL; | |
1240 | if (!list_empty (&ep->urb_list)) { | |
1241 | urb = list_entry (ep->urb_list.prev, struct urb, | |
1242 | urb_list); | |
1243 | usb_get_urb (urb); | |
1244 | } | |
1245 | spin_unlock_irq (&hcd_data_lock); | |
1246 | ||
1247 | if (urb) { | |
1248 | usb_kill_urb (urb); | |
1249 | usb_put_urb (urb); | |
1250 | } | |
1251 | } | |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | /*-------------------------------------------------------------------------*/ | |
1255 | ||
9293677a | 1256 | #ifdef CONFIG_PM |
1da177e4 | 1257 | |
0c0382e3 | 1258 | int hcd_bus_suspend (struct usb_bus *bus) |
1da177e4 LT |
1259 | { |
1260 | struct usb_hcd *hcd; | |
9293677a | 1261 | int status; |
1da177e4 LT |
1262 | |
1263 | hcd = container_of (bus, struct usb_hcd, self); | |
0c0382e3 | 1264 | if (!hcd->driver->bus_suspend) |
9293677a DB |
1265 | return -ENOENT; |
1266 | hcd->state = HC_STATE_QUIESCING; | |
0c0382e3 | 1267 | status = hcd->driver->bus_suspend (hcd); |
9293677a DB |
1268 | if (status == 0) |
1269 | hcd->state = HC_STATE_SUSPENDED; | |
1270 | else | |
1271 | dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", | |
1272 | "suspend", status); | |
1273 | return status; | |
1da177e4 LT |
1274 | } |
1275 | ||
0c0382e3 | 1276 | int hcd_bus_resume (struct usb_bus *bus) |
1da177e4 LT |
1277 | { |
1278 | struct usb_hcd *hcd; | |
9293677a | 1279 | int status; |
1da177e4 LT |
1280 | |
1281 | hcd = container_of (bus, struct usb_hcd, self); | |
0c0382e3 | 1282 | if (!hcd->driver->bus_resume) |
9293677a | 1283 | return -ENOENT; |
979d5199 DB |
1284 | if (hcd->state == HC_STATE_RUNNING) |
1285 | return 0; | |
9293677a | 1286 | hcd->state = HC_STATE_RESUMING; |
0c0382e3 | 1287 | status = hcd->driver->bus_resume (hcd); |
9293677a DB |
1288 | if (status == 0) |
1289 | hcd->state = HC_STATE_RUNNING; | |
1290 | else { | |
1291 | dev_dbg(&bus->root_hub->dev, "%s fail, err %d\n", | |
1292 | "resume", status); | |
1293 | usb_hc_died(hcd); | |
1294 | } | |
1295 | return status; | |
1da177e4 LT |
1296 | } |
1297 | ||
6b157c9b AS |
1298 | /* Workqueue routine for root-hub remote wakeup */ |
1299 | static void hcd_resume_work(struct work_struct *work) | |
1300 | { | |
1301 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); | |
1302 | struct usb_device *udev = hcd->self.root_hub; | |
1303 | ||
1304 | usb_lock_device(udev); | |
1941044a | 1305 | usb_mark_last_busy(udev); |
6b157c9b AS |
1306 | usb_external_resume_device(udev); |
1307 | usb_unlock_device(udev); | |
1308 | } | |
1309 | ||
1da177e4 LT |
1310 | /** |
1311 | * usb_hcd_resume_root_hub - called by HCD to resume its root hub | |
1312 | * @hcd: host controller for this root hub | |
1313 | * | |
1314 | * The USB host controller calls this function when its root hub is | |
1315 | * suspended (with the remote wakeup feature enabled) and a remote | |
6b157c9b AS |
1316 | * wakeup request is received. The routine submits a workqueue request |
1317 | * to resume the root hub (that is, manage its downstream ports again). | |
1da177e4 LT |
1318 | */ |
1319 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) | |
1320 | { | |
1321 | unsigned long flags; | |
1322 | ||
1323 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
1324 | if (hcd->rh_registered) | |
6b157c9b | 1325 | queue_work(ksuspend_usb_wq, &hcd->wakeup_work); |
1da177e4 LT |
1326 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
1327 | } | |
9293677a | 1328 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
1da177e4 | 1329 | |
1da177e4 | 1330 | #endif |
1da177e4 LT |
1331 | |
1332 | /*-------------------------------------------------------------------------*/ | |
1333 | ||
1334 | #ifdef CONFIG_USB_OTG | |
1335 | ||
1336 | /** | |
1337 | * usb_bus_start_enum - start immediate enumeration (for OTG) | |
1338 | * @bus: the bus (must use hcd framework) | |
1339 | * @port_num: 1-based number of port; usually bus->otg_port | |
1340 | * Context: in_interrupt() | |
1341 | * | |
1342 | * Starts enumeration, with an immediate reset followed later by | |
1343 | * khubd identifying and possibly configuring the device. | |
1344 | * This is needed by OTG controller drivers, where it helps meet | |
1345 | * HNP protocol timing requirements for starting a port reset. | |
1346 | */ | |
1347 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) | |
1348 | { | |
1349 | struct usb_hcd *hcd; | |
1350 | int status = -EOPNOTSUPP; | |
1351 | ||
1352 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, | |
1353 | * boards with root hubs hooked up to internal devices (instead of | |
1354 | * just the OTG port) may need more attention to resetting... | |
1355 | */ | |
1356 | hcd = container_of (bus, struct usb_hcd, self); | |
1357 | if (port_num && hcd->driver->start_port_reset) | |
1358 | status = hcd->driver->start_port_reset(hcd, port_num); | |
1359 | ||
1360 | /* run khubd shortly after (first) root port reset finishes; | |
1361 | * it may issue others, until at least 50 msecs have passed. | |
1362 | */ | |
1363 | if (status == 0) | |
1364 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); | |
1365 | return status; | |
1366 | } | |
1367 | EXPORT_SYMBOL (usb_bus_start_enum); | |
1368 | ||
1369 | #endif | |
1370 | ||
1371 | /*-------------------------------------------------------------------------*/ | |
1372 | ||
1da177e4 LT |
1373 | /** |
1374 | * usb_hcd_giveback_urb - return URB from HCD to device driver | |
1375 | * @hcd: host controller returning the URB | |
1376 | * @urb: urb being returned to the USB device driver. | |
1da177e4 LT |
1377 | * Context: in_interrupt() |
1378 | * | |
1379 | * This hands the URB from HCD to its USB device driver, using its | |
1380 | * completion function. The HCD has freed all per-urb resources | |
1381 | * (and is done using urb->hcpriv). It also released all HCD locks; | |
1382 | * the device driver won't cause problems if it frees, modifies, | |
1383 | * or resubmits this URB. | |
1384 | */ | |
7d12e780 | 1385 | void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb) |
1da177e4 LT |
1386 | { |
1387 | int at_root_hub; | |
1388 | ||
1389 | at_root_hub = (urb->dev == hcd->self.root_hub); | |
1390 | urb_unlink (urb); | |
1391 | ||
dd990f16 AS |
1392 | /* lower level hcd code should use *_dma exclusively if the |
1393 | * host controller does DMA */ | |
1394 | if (hcd->self.uses_dma && !at_root_hub) { | |
1da177e4 LT |
1395 | if (usb_pipecontrol (urb->pipe) |
1396 | && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) | |
1397 | dma_unmap_single (hcd->self.controller, urb->setup_dma, | |
1398 | sizeof (struct usb_ctrlrequest), | |
1399 | DMA_TO_DEVICE); | |
1400 | if (urb->transfer_buffer_length != 0 | |
1401 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) | |
1402 | dma_unmap_single (hcd->self.controller, | |
1403 | urb->transfer_dma, | |
1404 | urb->transfer_buffer_length, | |
1405 | usb_pipein (urb->pipe) | |
1406 | ? DMA_FROM_DEVICE | |
1407 | : DMA_TO_DEVICE); | |
1408 | } | |
1409 | ||
1410 | usbmon_urb_complete (&hcd->self, urb); | |
1411 | /* pass ownership to the completion handler */ | |
7d12e780 | 1412 | urb->complete (urb); |
1da177e4 LT |
1413 | atomic_dec (&urb->use_count); |
1414 | if (unlikely (urb->reject)) | |
1415 | wake_up (&usb_kill_urb_queue); | |
1416 | usb_put_urb (urb); | |
1417 | } | |
1418 | EXPORT_SYMBOL (usb_hcd_giveback_urb); | |
1419 | ||
1420 | /*-------------------------------------------------------------------------*/ | |
1421 | ||
1422 | /** | |
1423 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) | |
1424 | * @irq: the IRQ being raised | |
1425 | * @__hcd: pointer to the HCD whose IRQ is being signaled | |
1426 | * @r: saved hardware registers | |
1427 | * | |
1428 | * If the controller isn't HALTed, calls the driver's irq handler. | |
1429 | * Checks whether the controller is now dead. | |
1430 | */ | |
7d12e780 | 1431 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
1da177e4 LT |
1432 | { |
1433 | struct usb_hcd *hcd = __hcd; | |
1434 | int start = hcd->state; | |
1435 | ||
8de98402 BH |
1436 | if (unlikely(start == HC_STATE_HALT || |
1437 | !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) | |
1da177e4 | 1438 | return IRQ_NONE; |
7d12e780 | 1439 | if (hcd->driver->irq (hcd) == IRQ_NONE) |
1da177e4 LT |
1440 | return IRQ_NONE; |
1441 | ||
8de98402 BH |
1442 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); |
1443 | ||
1444 | if (unlikely(hcd->state == HC_STATE_HALT)) | |
1da177e4 LT |
1445 | usb_hc_died (hcd); |
1446 | return IRQ_HANDLED; | |
1447 | } | |
1448 | ||
1449 | /*-------------------------------------------------------------------------*/ | |
1450 | ||
1451 | /** | |
1452 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) | |
1453 | * @hcd: pointer to the HCD representing the controller | |
1454 | * | |
1455 | * This is called by bus glue to report a USB host controller that died | |
1456 | * while operations may still have been pending. It's called automatically | |
1457 | * by the PCI glue, so only glue for non-PCI busses should need to call it. | |
1458 | */ | |
1459 | void usb_hc_died (struct usb_hcd *hcd) | |
1460 | { | |
1461 | unsigned long flags; | |
1462 | ||
1463 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); | |
1464 | ||
1465 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
1466 | if (hcd->rh_registered) { | |
d5926ae7 | 1467 | hcd->poll_rh = 0; |
1da177e4 LT |
1468 | |
1469 | /* make khubd clean up old urbs and devices */ | |
1470 | usb_set_device_state (hcd->self.root_hub, | |
1471 | USB_STATE_NOTATTACHED); | |
1472 | usb_kick_khubd (hcd->self.root_hub); | |
1473 | } | |
1474 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); | |
1475 | } | |
1476 | EXPORT_SYMBOL_GPL (usb_hc_died); | |
1477 | ||
1478 | /*-------------------------------------------------------------------------*/ | |
1479 | ||
1da177e4 LT |
1480 | /** |
1481 | * usb_create_hcd - create and initialize an HCD structure | |
1482 | * @driver: HC driver that will use this hcd | |
1483 | * @dev: device for this HC, stored in hcd->self.controller | |
1484 | * @bus_name: value to store in hcd->self.bus_name | |
1485 | * Context: !in_interrupt() | |
1486 | * | |
1487 | * Allocate a struct usb_hcd, with extra space at the end for the | |
1488 | * HC driver's private data. Initialize the generic members of the | |
1489 | * hcd structure. | |
1490 | * | |
1491 | * If memory is unavailable, returns NULL. | |
1492 | */ | |
1493 | struct usb_hcd *usb_create_hcd (const struct hc_driver *driver, | |
1494 | struct device *dev, char *bus_name) | |
1495 | { | |
1496 | struct usb_hcd *hcd; | |
1497 | ||
7b842b6e | 1498 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
1da177e4 LT |
1499 | if (!hcd) { |
1500 | dev_dbg (dev, "hcd alloc failed\n"); | |
1501 | return NULL; | |
1502 | } | |
1503 | dev_set_drvdata(dev, hcd); | |
17200583 | 1504 | kref_init(&hcd->kref); |
1da177e4 LT |
1505 | |
1506 | usb_bus_init(&hcd->self); | |
1da177e4 LT |
1507 | hcd->self.controller = dev; |
1508 | hcd->self.bus_name = bus_name; | |
dd990f16 | 1509 | hcd->self.uses_dma = (dev->dma_mask != NULL); |
1da177e4 LT |
1510 | |
1511 | init_timer(&hcd->rh_timer); | |
d5926ae7 AS |
1512 | hcd->rh_timer.function = rh_timer_func; |
1513 | hcd->rh_timer.data = (unsigned long) hcd; | |
6b157c9b AS |
1514 | #ifdef CONFIG_PM |
1515 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); | |
1516 | #endif | |
1da177e4 LT |
1517 | |
1518 | hcd->driver = driver; | |
1519 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : | |
1520 | "USB Host Controller"; | |
1521 | ||
1522 | return hcd; | |
1523 | } | |
1524 | EXPORT_SYMBOL (usb_create_hcd); | |
1525 | ||
17200583 AS |
1526 | static void hcd_release (struct kref *kref) |
1527 | { | |
1528 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); | |
1529 | ||
1530 | kfree(hcd); | |
1531 | } | |
1532 | ||
1533 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) | |
1534 | { | |
1535 | if (hcd) | |
1536 | kref_get (&hcd->kref); | |
1537 | return hcd; | |
1538 | } | |
1539 | EXPORT_SYMBOL (usb_get_hcd); | |
1540 | ||
1da177e4 LT |
1541 | void usb_put_hcd (struct usb_hcd *hcd) |
1542 | { | |
17200583 AS |
1543 | if (hcd) |
1544 | kref_put (&hcd->kref, hcd_release); | |
1da177e4 LT |
1545 | } |
1546 | EXPORT_SYMBOL (usb_put_hcd); | |
1547 | ||
1548 | /** | |
1549 | * usb_add_hcd - finish generic HCD structure initialization and register | |
1550 | * @hcd: the usb_hcd structure to initialize | |
1551 | * @irqnum: Interrupt line to allocate | |
1552 | * @irqflags: Interrupt type flags | |
1553 | * | |
1554 | * Finish the remaining parts of generic HCD initialization: allocate the | |
1555 | * buffers of consistent memory, register the bus, request the IRQ line, | |
1556 | * and call the driver's reset() and start() routines. | |
1557 | */ | |
1558 | int usb_add_hcd(struct usb_hcd *hcd, | |
1559 | unsigned int irqnum, unsigned long irqflags) | |
1560 | { | |
8ec8d20b AS |
1561 | int retval; |
1562 | struct usb_device *rhdev; | |
1da177e4 LT |
1563 | |
1564 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); | |
1565 | ||
8de98402 BH |
1566 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
1567 | ||
b1e8f0a6 DB |
1568 | /* HC is in reset state, but accessible. Now do the one-time init, |
1569 | * bottom up so that hcds can customize the root hubs before khubd | |
1570 | * starts talking to them. (Note, bus id is assigned early too.) | |
1571 | */ | |
1da177e4 LT |
1572 | if ((retval = hcd_buffer_create(hcd)) != 0) { |
1573 | dev_dbg(hcd->self.controller, "pool alloc failed\n"); | |
1574 | return retval; | |
1575 | } | |
1576 | ||
1577 | if ((retval = usb_register_bus(&hcd->self)) < 0) | |
8ec8d20b | 1578 | goto err_register_bus; |
1da177e4 | 1579 | |
b1e8f0a6 DB |
1580 | if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { |
1581 | dev_err(hcd->self.controller, "unable to allocate root hub\n"); | |
1582 | retval = -ENOMEM; | |
1583 | goto err_allocate_root_hub; | |
1584 | } | |
1585 | rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH : | |
1586 | USB_SPEED_FULL; | |
1587 | hcd->self.root_hub = rhdev; | |
1588 | ||
db4cefaa DB |
1589 | /* wakeup flag init defaults to "everything works" for root hubs, |
1590 | * but drivers can override it in reset() if needed, along with | |
1591 | * recording the overall controller's system wakeup capability. | |
1592 | */ | |
1593 | device_init_wakeup(&rhdev->dev, 1); | |
1594 | ||
b1e8f0a6 DB |
1595 | /* "reset" is misnamed; its role is now one-time init. the controller |
1596 | * should already have been reset (and boot firmware kicked off etc). | |
1597 | */ | |
1598 | if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { | |
1599 | dev_err(hcd->self.controller, "can't setup\n"); | |
1600 | goto err_hcd_driver_setup; | |
1601 | } | |
1602 | ||
fb669cc0 DB |
1603 | /* NOTE: root hub and controller capabilities may not be the same */ |
1604 | if (device_can_wakeup(hcd->self.controller) | |
1605 | && device_can_wakeup(&hcd->self.root_hub->dev)) | |
b1e8f0a6 | 1606 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
b1e8f0a6 DB |
1607 | |
1608 | /* enable irqs just before we start the controller */ | |
1da177e4 | 1609 | if (hcd->driver->irq) { |
1da177e4 LT |
1610 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", |
1611 | hcd->driver->description, hcd->self.busnum); | |
1612 | if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, | |
1613 | hcd->irq_descr, hcd)) != 0) { | |
1614 | dev_err(hcd->self.controller, | |
c6387a48 | 1615 | "request interrupt %d failed\n", irqnum); |
8ec8d20b | 1616 | goto err_request_irq; |
1da177e4 LT |
1617 | } |
1618 | hcd->irq = irqnum; | |
c6387a48 | 1619 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, |
1da177e4 LT |
1620 | (hcd->driver->flags & HCD_MEMORY) ? |
1621 | "io mem" : "io base", | |
1622 | (unsigned long long)hcd->rsrc_start); | |
1623 | } else { | |
1624 | hcd->irq = -1; | |
1625 | if (hcd->rsrc_start) | |
1626 | dev_info(hcd->self.controller, "%s 0x%08llx\n", | |
1627 | (hcd->driver->flags & HCD_MEMORY) ? | |
1628 | "io mem" : "io base", | |
1629 | (unsigned long long)hcd->rsrc_start); | |
1630 | } | |
1631 | ||
1632 | if ((retval = hcd->driver->start(hcd)) < 0) { | |
1633 | dev_err(hcd->self.controller, "startup error %d\n", retval); | |
8ec8d20b | 1634 | goto err_hcd_driver_start; |
1da177e4 LT |
1635 | } |
1636 | ||
b1e8f0a6 | 1637 | /* starting here, usbcore will pay attention to this root hub */ |
55c52718 | 1638 | rhdev->bus_mA = min(500u, hcd->power_budget); |
b1e8f0a6 | 1639 | if ((retval = register_root_hub(hcd)) != 0) |
8ec8d20b AS |
1640 | goto err_register_root_hub; |
1641 | ||
d5926ae7 AS |
1642 | if (hcd->uses_new_polling && hcd->poll_rh) |
1643 | usb_hcd_poll_rh_status(hcd); | |
1da177e4 LT |
1644 | return retval; |
1645 | ||
b1e8f0a6 | 1646 | err_register_root_hub: |
8ec8d20b | 1647 | hcd->driver->stop(hcd); |
b1e8f0a6 | 1648 | err_hcd_driver_start: |
1da177e4 LT |
1649 | if (hcd->irq >= 0) |
1650 | free_irq(irqnum, hcd); | |
b1e8f0a6 DB |
1651 | err_request_irq: |
1652 | err_hcd_driver_setup: | |
1653 | hcd->self.root_hub = NULL; | |
1654 | usb_put_dev(rhdev); | |
1655 | err_allocate_root_hub: | |
1da177e4 | 1656 | usb_deregister_bus(&hcd->self); |
b1e8f0a6 | 1657 | err_register_bus: |
1da177e4 LT |
1658 | hcd_buffer_destroy(hcd); |
1659 | return retval; | |
1660 | } | |
1661 | EXPORT_SYMBOL (usb_add_hcd); | |
1662 | ||
1663 | /** | |
1664 | * usb_remove_hcd - shutdown processing for generic HCDs | |
1665 | * @hcd: the usb_hcd structure to remove | |
1666 | * Context: !in_interrupt() | |
1667 | * | |
1668 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), | |
1669 | * invoking the HCD's stop() method. | |
1670 | */ | |
1671 | void usb_remove_hcd(struct usb_hcd *hcd) | |
1672 | { | |
1673 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); | |
1674 | ||
1675 | if (HC_IS_RUNNING (hcd->state)) | |
1676 | hcd->state = HC_STATE_QUIESCING; | |
1677 | ||
1678 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); | |
1679 | spin_lock_irq (&hcd_root_hub_lock); | |
1680 | hcd->rh_registered = 0; | |
1681 | spin_unlock_irq (&hcd_root_hub_lock); | |
9ad3d6cc | 1682 | |
6b157c9b | 1683 | #ifdef CONFIG_PM |
d5d4db70 | 1684 | cancel_work_sync(&hcd->wakeup_work); |
6b157c9b AS |
1685 | #endif |
1686 | ||
4186ecf8 | 1687 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 1688 | usb_disconnect(&hcd->self.root_hub); |
4186ecf8 | 1689 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
1690 | |
1691 | hcd->driver->stop(hcd); | |
1692 | hcd->state = HC_STATE_HALT; | |
1693 | ||
1b42ae6d AS |
1694 | hcd->poll_rh = 0; |
1695 | del_timer_sync(&hcd->rh_timer); | |
1696 | ||
1da177e4 LT |
1697 | if (hcd->irq >= 0) |
1698 | free_irq(hcd->irq, hcd); | |
1699 | usb_deregister_bus(&hcd->self); | |
1700 | hcd_buffer_destroy(hcd); | |
1701 | } | |
1702 | EXPORT_SYMBOL (usb_remove_hcd); | |
1703 | ||
64a21d02 AG |
1704 | void |
1705 | usb_hcd_platform_shutdown(struct platform_device* dev) | |
1706 | { | |
1707 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
1708 | ||
1709 | if (hcd->driver->shutdown) | |
1710 | hcd->driver->shutdown(hcd); | |
1711 | } | |
1712 | EXPORT_SYMBOL (usb_hcd_platform_shutdown); | |
1713 | ||
1da177e4 LT |
1714 | /*-------------------------------------------------------------------------*/ |
1715 | ||
4749f32d | 1716 | #if defined(CONFIG_USB_MON) |
1da177e4 LT |
1717 | |
1718 | struct usb_mon_operations *mon_ops; | |
1719 | ||
1720 | /* | |
1721 | * The registration is unlocked. | |
1722 | * We do it this way because we do not want to lock in hot paths. | |
1723 | * | |
1724 | * Notice that the code is minimally error-proof. Because usbmon needs | |
1725 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. | |
1726 | */ | |
1727 | ||
1728 | int usb_mon_register (struct usb_mon_operations *ops) | |
1729 | { | |
1730 | ||
1731 | if (mon_ops) | |
1732 | return -EBUSY; | |
1733 | ||
1734 | mon_ops = ops; | |
1735 | mb(); | |
1736 | return 0; | |
1737 | } | |
1738 | EXPORT_SYMBOL_GPL (usb_mon_register); | |
1739 | ||
1740 | void usb_mon_deregister (void) | |
1741 | { | |
1742 | ||
1743 | if (mon_ops == NULL) { | |
1744 | printk(KERN_ERR "USB: monitor was not registered\n"); | |
1745 | return; | |
1746 | } | |
1747 | mon_ops = NULL; | |
1748 | mb(); | |
1749 | } | |
1750 | EXPORT_SYMBOL_GPL (usb_mon_deregister); | |
1751 | ||
1752 | #endif /* CONFIG_USB_MON */ |