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Commit | Line | Data |
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de31213f SG |
1 | /* |
2 | * (C) Copyright 2015 Google, Inc | |
3 | * Written by Simon Glass <sjg@chromium.org> | |
4 | * | |
0566e240 SG |
5 | * usb_match_device() modified from Linux kernel v4.0. |
6 | * | |
de31213f SG |
7 | * SPDX-License-Identifier: GPL-2.0+ |
8 | */ | |
9 | ||
10 | #include <common.h> | |
11 | #include <dm.h> | |
12 | #include <errno.h> | |
cf92e05c | 13 | #include <memalign.h> |
de31213f SG |
14 | #include <usb.h> |
15 | #include <dm/device-internal.h> | |
16 | #include <dm/lists.h> | |
de31213f SG |
17 | #include <dm/uclass-internal.h> |
18 | ||
19 | DECLARE_GLOBAL_DATA_PTR; | |
20 | ||
21 | extern bool usb_started; /* flag for the started/stopped USB status */ | |
22 | static bool asynch_allowed; | |
23 | ||
e253637b HG |
24 | struct usb_uclass_priv { |
25 | int companion_device_count; | |
26 | }; | |
27 | ||
de31213f SG |
28 | int usb_disable_asynch(int disable) |
29 | { | |
30 | int old_value = asynch_allowed; | |
31 | ||
32 | asynch_allowed = !disable; | |
33 | return old_value; | |
34 | } | |
35 | ||
36 | int submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer, | |
37 | int length, int interval) | |
38 | { | |
39 | struct udevice *bus = udev->controller_dev; | |
40 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
41 | ||
42 | if (!ops->interrupt) | |
43 | return -ENOSYS; | |
44 | ||
45 | return ops->interrupt(bus, udev, pipe, buffer, length, interval); | |
46 | } | |
47 | ||
48 | int submit_control_msg(struct usb_device *udev, unsigned long pipe, | |
49 | void *buffer, int length, struct devrequest *setup) | |
50 | { | |
51 | struct udevice *bus = udev->controller_dev; | |
52 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
e253637b HG |
53 | struct usb_uclass_priv *uc_priv = bus->uclass->priv; |
54 | int err; | |
de31213f SG |
55 | |
56 | if (!ops->control) | |
57 | return -ENOSYS; | |
58 | ||
e253637b HG |
59 | err = ops->control(bus, udev, pipe, buffer, length, setup); |
60 | if (setup->request == USB_REQ_SET_FEATURE && | |
61 | setup->requesttype == USB_RT_PORT && | |
62 | setup->value == cpu_to_le16(USB_PORT_FEAT_RESET) && | |
63 | err == -ENXIO) { | |
64 | /* Device handed over to companion after port reset */ | |
65 | uc_priv->companion_device_count++; | |
66 | } | |
67 | ||
68 | return err; | |
de31213f SG |
69 | } |
70 | ||
71 | int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer, | |
72 | int length) | |
73 | { | |
74 | struct udevice *bus = udev->controller_dev; | |
75 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
76 | ||
77 | if (!ops->bulk) | |
78 | return -ENOSYS; | |
79 | ||
80 | return ops->bulk(bus, udev, pipe, buffer, length); | |
81 | } | |
82 | ||
8a5f0665 HG |
83 | struct int_queue *create_int_queue(struct usb_device *udev, |
84 | unsigned long pipe, int queuesize, int elementsize, | |
85 | void *buffer, int interval) | |
86 | { | |
87 | struct udevice *bus = udev->controller_dev; | |
88 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
89 | ||
90 | if (!ops->create_int_queue) | |
91 | return NULL; | |
92 | ||
93 | return ops->create_int_queue(bus, udev, pipe, queuesize, elementsize, | |
94 | buffer, interval); | |
95 | } | |
96 | ||
97 | void *poll_int_queue(struct usb_device *udev, struct int_queue *queue) | |
98 | { | |
99 | struct udevice *bus = udev->controller_dev; | |
100 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
101 | ||
102 | if (!ops->poll_int_queue) | |
103 | return NULL; | |
104 | ||
105 | return ops->poll_int_queue(bus, udev, queue); | |
106 | } | |
107 | ||
108 | int destroy_int_queue(struct usb_device *udev, struct int_queue *queue) | |
109 | { | |
110 | struct udevice *bus = udev->controller_dev; | |
111 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
112 | ||
113 | if (!ops->destroy_int_queue) | |
114 | return -ENOSYS; | |
115 | ||
116 | return ops->destroy_int_queue(bus, udev, queue); | |
117 | } | |
118 | ||
de31213f SG |
119 | int usb_alloc_device(struct usb_device *udev) |
120 | { | |
121 | struct udevice *bus = udev->controller_dev; | |
122 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
123 | ||
124 | /* This is only requird by some controllers - current XHCI */ | |
125 | if (!ops->alloc_device) | |
126 | return 0; | |
127 | ||
128 | return ops->alloc_device(bus, udev); | |
129 | } | |
130 | ||
b2f219b0 HG |
131 | int usb_reset_root_port(struct usb_device *udev) |
132 | { | |
133 | struct udevice *bus = udev->controller_dev; | |
134 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
135 | ||
136 | if (!ops->reset_root_port) | |
137 | return -ENOSYS; | |
138 | ||
139 | return ops->reset_root_port(bus, udev); | |
140 | } | |
141 | ||
9ca1b4ba BM |
142 | int usb_update_hub_device(struct usb_device *udev) |
143 | { | |
144 | struct udevice *bus = udev->controller_dev; | |
145 | struct dm_usb_ops *ops = usb_get_ops(bus); | |
146 | ||
147 | if (!ops->update_hub_device) | |
148 | return -ENOSYS; | |
149 | ||
150 | return ops->update_hub_device(bus, udev); | |
151 | } | |
152 | ||
de31213f SG |
153 | int usb_stop(void) |
154 | { | |
155 | struct udevice *bus; | |
156 | struct uclass *uc; | |
e253637b | 157 | struct usb_uclass_priv *uc_priv; |
de31213f SG |
158 | int err = 0, ret; |
159 | ||
160 | /* De-activate any devices that have been activated */ | |
161 | ret = uclass_get(UCLASS_USB, &uc); | |
162 | if (ret) | |
163 | return ret; | |
e253637b HG |
164 | |
165 | uc_priv = uc->priv; | |
166 | ||
de31213f | 167 | uclass_foreach_dev(bus, uc) { |
706865af | 168 | ret = device_remove(bus, DM_REMOVE_NORMAL); |
de31213f SG |
169 | if (ret && !err) |
170 | err = ret; | |
171 | } | |
9b977568 SG |
172 | #ifdef CONFIG_BLK |
173 | ret = blk_unbind_all(IF_TYPE_USB); | |
174 | if (ret && !err) | |
175 | err = ret; | |
176 | #endif | |
095fdef0 SG |
177 | #ifdef CONFIG_SANDBOX |
178 | struct udevice *dev; | |
179 | ||
180 | /* Reset all enulation devices */ | |
181 | ret = uclass_get(UCLASS_USB_EMUL, &uc); | |
182 | if (ret) | |
183 | return ret; | |
184 | ||
185 | uclass_foreach_dev(dev, uc) | |
186 | usb_emul_reset(dev); | |
187 | #endif | |
0fa5999b | 188 | #ifdef CONFIG_USB_STORAGE |
de31213f | 189 | usb_stor_reset(); |
0fa5999b | 190 | #endif |
e253637b | 191 | uc_priv->companion_device_count = 0; |
de31213f SG |
192 | usb_started = 0; |
193 | ||
194 | return err; | |
195 | } | |
196 | ||
a24a0e91 | 197 | static void usb_scan_bus(struct udevice *bus, bool recurse) |
de31213f SG |
198 | { |
199 | struct usb_bus_priv *priv; | |
200 | struct udevice *dev; | |
201 | int ret; | |
202 | ||
203 | priv = dev_get_uclass_priv(bus); | |
204 | ||
205 | assert(recurse); /* TODO: Support non-recusive */ | |
206 | ||
a24a0e91 HG |
207 | printf("scanning bus %d for devices... ", bus->seq); |
208 | debug("\n"); | |
de31213f SG |
209 | ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev); |
210 | if (ret) | |
a24a0e91 HG |
211 | printf("failed, error %d\n", ret); |
212 | else if (priv->next_addr == 0) | |
213 | printf("No USB Device found\n"); | |
214 | else | |
215 | printf("%d USB Device(s) found\n", priv->next_addr); | |
de31213f SG |
216 | } |
217 | ||
eae11bec SG |
218 | static void remove_inactive_children(struct uclass *uc, struct udevice *bus) |
219 | { | |
220 | uclass_foreach_dev(bus, uc) { | |
221 | struct udevice *dev, *next; | |
222 | ||
223 | if (!device_active(bus)) | |
224 | continue; | |
225 | device_foreach_child_safe(dev, next, bus) { | |
226 | if (!device_active(dev)) | |
227 | device_unbind(dev); | |
228 | } | |
229 | } | |
230 | } | |
231 | ||
de31213f SG |
232 | int usb_init(void) |
233 | { | |
234 | int controllers_initialized = 0; | |
e253637b | 235 | struct usb_uclass_priv *uc_priv; |
b6de4d10 | 236 | struct usb_bus_priv *priv; |
de31213f SG |
237 | struct udevice *bus; |
238 | struct uclass *uc; | |
239 | int count = 0; | |
240 | int ret; | |
241 | ||
242 | asynch_allowed = 1; | |
de31213f SG |
243 | |
244 | ret = uclass_get(UCLASS_USB, &uc); | |
245 | if (ret) | |
246 | return ret; | |
247 | ||
e253637b HG |
248 | uc_priv = uc->priv; |
249 | ||
de31213f SG |
250 | uclass_foreach_dev(bus, uc) { |
251 | /* init low_level USB */ | |
134692af | 252 | printf("USB%d: ", count); |
de31213f | 253 | count++; |
de31213f SG |
254 | ret = device_probe(bus); |
255 | if (ret == -ENODEV) { /* No such device. */ | |
256 | puts("Port not available.\n"); | |
257 | controllers_initialized++; | |
258 | continue; | |
259 | } | |
260 | ||
261 | if (ret) { /* Other error. */ | |
262 | printf("probe failed, error %d\n", ret); | |
263 | continue; | |
264 | } | |
de31213f | 265 | controllers_initialized++; |
de31213f SG |
266 | usb_started = true; |
267 | } | |
268 | ||
b6de4d10 HG |
269 | /* |
270 | * lowlevel init done, now scan the bus for devices i.e. search HUBs | |
271 | * and configure them, first scan primary controllers. | |
272 | */ | |
273 | uclass_foreach_dev(bus, uc) { | |
274 | if (!device_active(bus)) | |
275 | continue; | |
276 | ||
277 | priv = dev_get_uclass_priv(bus); | |
278 | if (!priv->companion) | |
279 | usb_scan_bus(bus, true); | |
280 | } | |
281 | ||
282 | /* | |
283 | * Now that the primary controllers have been scanned and have handed | |
284 | * over any devices they do not understand to their companions, scan | |
e253637b | 285 | * the companions if necessary. |
b6de4d10 | 286 | */ |
e253637b HG |
287 | if (uc_priv->companion_device_count) { |
288 | uclass_foreach_dev(bus, uc) { | |
289 | if (!device_active(bus)) | |
290 | continue; | |
b6de4d10 | 291 | |
e253637b HG |
292 | priv = dev_get_uclass_priv(bus); |
293 | if (priv->companion) | |
294 | usb_scan_bus(bus, true); | |
295 | } | |
b6de4d10 HG |
296 | } |
297 | ||
de31213f | 298 | debug("scan end\n"); |
eae11bec SG |
299 | |
300 | /* Remove any devices that were not found on this scan */ | |
301 | remove_inactive_children(uc, bus); | |
302 | ||
303 | ret = uclass_get(UCLASS_USB_HUB, &uc); | |
304 | if (ret) | |
305 | return ret; | |
306 | remove_inactive_children(uc, bus); | |
307 | ||
de31213f SG |
308 | /* if we were not able to find at least one working bus, bail out */ |
309 | if (!count) | |
310 | printf("No controllers found\n"); | |
311 | else if (controllers_initialized == 0) | |
312 | printf("USB error: all controllers failed lowlevel init\n"); | |
313 | ||
314 | return usb_started ? 0 : -1; | |
315 | } | |
316 | ||
e8ea5e8c SG |
317 | /* |
318 | * TODO(sjg@chromium.org): Remove this legacy function. At present it is needed | |
319 | * to support boards which use driver model for USB but not Ethernet, and want | |
320 | * to use USB Ethernet. | |
321 | * | |
322 | * The #if clause is here to ensure that remains the only case. | |
323 | */ | |
324 | #if !defined(CONFIG_DM_ETH) && defined(CONFIG_USB_HOST_ETHER) | |
de31213f SG |
325 | static struct usb_device *find_child_devnum(struct udevice *parent, int devnum) |
326 | { | |
327 | struct usb_device *udev; | |
328 | struct udevice *dev; | |
329 | ||
330 | if (!device_active(parent)) | |
331 | return NULL; | |
bcbe3d15 | 332 | udev = dev_get_parent_priv(parent); |
de31213f SG |
333 | if (udev->devnum == devnum) |
334 | return udev; | |
335 | ||
336 | for (device_find_first_child(parent, &dev); | |
337 | dev; | |
338 | device_find_next_child(&dev)) { | |
339 | udev = find_child_devnum(dev, devnum); | |
340 | if (udev) | |
341 | return udev; | |
342 | } | |
343 | ||
344 | return NULL; | |
345 | } | |
346 | ||
347 | struct usb_device *usb_get_dev_index(struct udevice *bus, int index) | |
348 | { | |
fd1bd21b | 349 | struct udevice *dev; |
de31213f SG |
350 | int devnum = index + 1; /* Addresses are allocated from 1 on USB */ |
351 | ||
fd1bd21b HG |
352 | device_find_first_child(bus, &dev); |
353 | if (!dev) | |
354 | return NULL; | |
de31213f | 355 | |
fd1bd21b | 356 | return find_child_devnum(dev, devnum); |
de31213f | 357 | } |
e8ea5e8c | 358 | #endif |
de31213f | 359 | |
fbeceb26 SG |
360 | int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp) |
361 | { | |
362 | struct usb_platdata *plat; | |
363 | struct udevice *dev; | |
364 | int ret; | |
365 | ||
366 | /* Find the old device and remove it */ | |
367 | ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev); | |
368 | if (ret) | |
369 | return ret; | |
706865af | 370 | ret = device_remove(dev, DM_REMOVE_NORMAL); |
fbeceb26 SG |
371 | if (ret) |
372 | return ret; | |
373 | ||
374 | plat = dev_get_platdata(dev); | |
375 | plat->init_type = USB_INIT_DEVICE; | |
376 | ret = device_probe(dev); | |
377 | if (ret) | |
378 | return ret; | |
379 | *ctlrp = dev_get_priv(dev); | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
0566e240 | 384 | /* returns 0 if no match, 1 if match */ |
121a4d13 MY |
385 | static int usb_match_device(const struct usb_device_descriptor *desc, |
386 | const struct usb_device_id *id) | |
0566e240 SG |
387 | { |
388 | if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && | |
389 | id->idVendor != le16_to_cpu(desc->idVendor)) | |
390 | return 0; | |
391 | ||
392 | if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) && | |
393 | id->idProduct != le16_to_cpu(desc->idProduct)) | |
394 | return 0; | |
395 | ||
396 | /* No need to test id->bcdDevice_lo != 0, since 0 is never | |
397 | greater than any unsigned number. */ | |
398 | if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) && | |
399 | (id->bcdDevice_lo > le16_to_cpu(desc->bcdDevice))) | |
400 | return 0; | |
401 | ||
402 | if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) && | |
403 | (id->bcdDevice_hi < le16_to_cpu(desc->bcdDevice))) | |
404 | return 0; | |
405 | ||
406 | if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) && | |
407 | (id->bDeviceClass != desc->bDeviceClass)) | |
408 | return 0; | |
409 | ||
410 | if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) && | |
411 | (id->bDeviceSubClass != desc->bDeviceSubClass)) | |
412 | return 0; | |
413 | ||
414 | if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) && | |
415 | (id->bDeviceProtocol != desc->bDeviceProtocol)) | |
416 | return 0; | |
417 | ||
418 | return 1; | |
419 | } | |
420 | ||
421 | /* returns 0 if no match, 1 if match */ | |
121a4d13 MY |
422 | static int usb_match_one_id_intf(const struct usb_device_descriptor *desc, |
423 | const struct usb_interface_descriptor *int_desc, | |
424 | const struct usb_device_id *id) | |
0566e240 SG |
425 | { |
426 | /* The interface class, subclass, protocol and number should never be | |
427 | * checked for a match if the device class is Vendor Specific, | |
428 | * unless the match record specifies the Vendor ID. */ | |
429 | if (desc->bDeviceClass == USB_CLASS_VENDOR_SPEC && | |
430 | !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) && | |
431 | (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS | | |
432 | USB_DEVICE_ID_MATCH_INT_SUBCLASS | | |
433 | USB_DEVICE_ID_MATCH_INT_PROTOCOL | | |
434 | USB_DEVICE_ID_MATCH_INT_NUMBER))) | |
435 | return 0; | |
436 | ||
437 | if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) && | |
438 | (id->bInterfaceClass != int_desc->bInterfaceClass)) | |
439 | return 0; | |
440 | ||
441 | if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) && | |
442 | (id->bInterfaceSubClass != int_desc->bInterfaceSubClass)) | |
443 | return 0; | |
444 | ||
445 | if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) && | |
446 | (id->bInterfaceProtocol != int_desc->bInterfaceProtocol)) | |
447 | return 0; | |
448 | ||
449 | if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) && | |
450 | (id->bInterfaceNumber != int_desc->bInterfaceNumber)) | |
451 | return 0; | |
452 | ||
453 | return 1; | |
454 | } | |
455 | ||
456 | /* returns 0 if no match, 1 if match */ | |
121a4d13 MY |
457 | static int usb_match_one_id(struct usb_device_descriptor *desc, |
458 | struct usb_interface_descriptor *int_desc, | |
459 | const struct usb_device_id *id) | |
0566e240 SG |
460 | { |
461 | if (!usb_match_device(desc, id)) | |
462 | return 0; | |
463 | ||
464 | return usb_match_one_id_intf(desc, int_desc, id); | |
465 | } | |
466 | ||
467 | /** | |
468 | * usb_find_and_bind_driver() - Find and bind the right USB driver | |
469 | * | |
470 | * This only looks at certain fields in the descriptor. | |
471 | */ | |
472 | static int usb_find_and_bind_driver(struct udevice *parent, | |
473 | struct usb_device_descriptor *desc, | |
474 | struct usb_interface_descriptor *iface, | |
475 | int bus_seq, int devnum, | |
476 | struct udevice **devp) | |
477 | { | |
478 | struct usb_driver_entry *start, *entry; | |
479 | int n_ents; | |
480 | int ret; | |
481 | char name[30], *str; | |
482 | ||
483 | *devp = NULL; | |
484 | debug("%s: Searching for driver\n", __func__); | |
485 | start = ll_entry_start(struct usb_driver_entry, usb_driver_entry); | |
486 | n_ents = ll_entry_count(struct usb_driver_entry, usb_driver_entry); | |
487 | for (entry = start; entry != start + n_ents; entry++) { | |
488 | const struct usb_device_id *id; | |
489 | struct udevice *dev; | |
490 | const struct driver *drv; | |
491 | struct usb_dev_platdata *plat; | |
492 | ||
493 | for (id = entry->match; id->match_flags; id++) { | |
494 | if (!usb_match_one_id(desc, iface, id)) | |
495 | continue; | |
496 | ||
497 | drv = entry->driver; | |
498 | /* | |
499 | * We could pass the descriptor to the driver as | |
500 | * platdata (instead of NULL) and allow its bind() | |
501 | * method to return -ENOENT if it doesn't support this | |
502 | * device. That way we could continue the search to | |
503 | * find another driver. For now this doesn't seem | |
504 | * necesssary, so just bind the first match. | |
505 | */ | |
506 | ret = device_bind(parent, drv, drv->name, NULL, -1, | |
507 | &dev); | |
508 | if (ret) | |
509 | goto error; | |
510 | debug("%s: Match found: %s\n", __func__, drv->name); | |
511 | dev->driver_data = id->driver_info; | |
512 | plat = dev_get_parent_platdata(dev); | |
513 | plat->id = *id; | |
514 | *devp = dev; | |
515 | return 0; | |
516 | } | |
517 | } | |
518 | ||
449230f0 SG |
519 | /* Bind a generic driver so that the device can be used */ |
520 | snprintf(name, sizeof(name), "generic_bus_%x_dev_%x", bus_seq, devnum); | |
521 | str = strdup(name); | |
522 | if (!str) | |
523 | return -ENOMEM; | |
524 | ret = device_bind_driver(parent, "usb_dev_generic_drv", str, devp); | |
525 | ||
0566e240 SG |
526 | error: |
527 | debug("%s: No match found: %d\n", __func__, ret); | |
528 | return ret; | |
529 | } | |
530 | ||
531 | /** | |
1b6a1dff SG |
532 | * usb_find_child() - Find an existing device which matches our needs |
533 | * | |
534 | * | |
0566e240 | 535 | */ |
1b6a1dff SG |
536 | static int usb_find_child(struct udevice *parent, |
537 | struct usb_device_descriptor *desc, | |
538 | struct usb_interface_descriptor *iface, | |
539 | struct udevice **devp) | |
0566e240 SG |
540 | { |
541 | struct udevice *dev; | |
542 | ||
543 | *devp = NULL; | |
544 | for (device_find_first_child(parent, &dev); | |
545 | dev; | |
546 | device_find_next_child(&dev)) { | |
547 | struct usb_dev_platdata *plat = dev_get_parent_platdata(dev); | |
548 | ||
549 | /* If this device is already in use, skip it */ | |
550 | if (device_active(dev)) | |
551 | continue; | |
552 | debug(" %s: name='%s', plat=%d, desc=%d\n", __func__, | |
553 | dev->name, plat->id.bDeviceClass, desc->bDeviceClass); | |
554 | if (usb_match_one_id(desc, iface, &plat->id)) { | |
555 | *devp = dev; | |
556 | return 0; | |
557 | } | |
558 | } | |
1b6a1dff | 559 | |
0566e240 SG |
560 | return -ENOENT; |
561 | } | |
562 | ||
de31213f SG |
563 | int usb_scan_device(struct udevice *parent, int port, |
564 | enum usb_device_speed speed, struct udevice **devp) | |
565 | { | |
566 | struct udevice *dev; | |
567 | bool created = false; | |
568 | struct usb_dev_platdata *plat; | |
569 | struct usb_bus_priv *priv; | |
570 | struct usb_device *parent_udev; | |
571 | int ret; | |
572 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_device, udev, 1); | |
573 | struct usb_interface_descriptor *iface = &udev->config.if_desc[0].desc; | |
574 | ||
575 | *devp = NULL; | |
576 | memset(udev, '\0', sizeof(*udev)); | |
f78a5c07 | 577 | udev->controller_dev = usb_get_bus(parent); |
de31213f SG |
578 | priv = dev_get_uclass_priv(udev->controller_dev); |
579 | ||
580 | /* | |
581 | * Somewhat nasty, this. We create a local device and use the normal | |
582 | * USB stack to read its descriptor. Then we know what type of device | |
583 | * to create for real. | |
584 | * | |
585 | * udev->dev is set to the parent, since we don't have a real device | |
586 | * yet. The USB stack should not access udev.dev anyway, except perhaps | |
587 | * to find the controller, and the controller will either be @parent, | |
588 | * or some parent of @parent. | |
589 | * | |
590 | * Another option might be to create the device as a generic USB | |
591 | * device, then morph it into the correct one when we know what it | |
592 | * should be. This means that a generic USB device would morph into | |
593 | * a network controller, or a USB flash stick, for example. However, | |
594 | * we don't support such morphing and it isn't clear that it would | |
595 | * be easy to do. | |
596 | * | |
597 | * Yet another option is to split out the USB stack parts of udev | |
598 | * into something like a 'struct urb' (as Linux does) which can exist | |
599 | * independently of any device. This feels cleaner, but calls for quite | |
600 | * a big change to the USB stack. | |
601 | * | |
602 | * For now, the approach is to set up an empty udev, read its | |
603 | * descriptor and assign it an address, then bind a real device and | |
604 | * stash the resulting information into the device's parent | |
605 | * platform data. Then when we probe it, usb_child_pre_probe() is called | |
606 | * and it will pull the information out of the stash. | |
607 | */ | |
608 | udev->dev = parent; | |
609 | udev->speed = speed; | |
610 | udev->devnum = priv->next_addr + 1; | |
611 | udev->portnr = port; | |
612 | debug("Calling usb_setup_device(), portnr=%d\n", udev->portnr); | |
613 | parent_udev = device_get_uclass_id(parent) == UCLASS_USB_HUB ? | |
bcbe3d15 | 614 | dev_get_parent_priv(parent) : NULL; |
9eb72dd1 | 615 | ret = usb_setup_device(udev, priv->desc_before_addr, parent_udev); |
de31213f SG |
616 | debug("read_descriptor for '%s': ret=%d\n", parent->name, ret); |
617 | if (ret) | |
618 | return ret; | |
1b6a1dff SG |
619 | ret = usb_find_child(parent, &udev->descriptor, iface, &dev); |
620 | debug("** usb_find_child returns %d\n", ret); | |
0566e240 SG |
621 | if (ret) { |
622 | if (ret != -ENOENT) | |
623 | return ret; | |
624 | ret = usb_find_and_bind_driver(parent, &udev->descriptor, iface, | |
625 | udev->controller_dev->seq, | |
626 | udev->devnum, &dev); | |
627 | if (ret) | |
628 | return ret; | |
629 | created = true; | |
630 | } | |
631 | plat = dev_get_parent_platdata(dev); | |
632 | debug("%s: Probing '%s', plat=%p\n", __func__, dev->name, plat); | |
633 | plat->devnum = udev->devnum; | |
7f1a0753 | 634 | plat->udev = udev; |
0566e240 SG |
635 | priv->next_addr++; |
636 | ret = device_probe(dev); | |
637 | if (ret) { | |
638 | debug("%s: Device '%s' probe failed\n", __func__, dev->name); | |
639 | priv->next_addr--; | |
640 | if (created) | |
641 | device_unbind(dev); | |
642 | return ret; | |
643 | } | |
644 | *devp = dev; | |
de31213f | 645 | |
0566e240 | 646 | return 0; |
de31213f SG |
647 | } |
648 | ||
0c5dd9ae SG |
649 | /* |
650 | * Detect if a USB device has been plugged or unplugged. | |
651 | */ | |
652 | int usb_detect_change(void) | |
653 | { | |
654 | struct udevice *hub; | |
655 | struct uclass *uc; | |
656 | int change = 0; | |
657 | int ret; | |
658 | ||
659 | ret = uclass_get(UCLASS_USB_HUB, &uc); | |
660 | if (ret) | |
661 | return ret; | |
662 | ||
663 | uclass_foreach_dev(hub, uc) { | |
664 | struct usb_device *udev; | |
665 | struct udevice *dev; | |
666 | ||
667 | if (!device_active(hub)) | |
668 | continue; | |
669 | for (device_find_first_child(hub, &dev); | |
670 | dev; | |
671 | device_find_next_child(&dev)) { | |
672 | struct usb_port_status status; | |
673 | ||
674 | if (!device_active(dev)) | |
675 | continue; | |
676 | ||
bcbe3d15 | 677 | udev = dev_get_parent_priv(dev); |
0c5dd9ae SG |
678 | if (usb_get_port_status(udev, udev->portnr, &status) |
679 | < 0) | |
680 | /* USB request failed */ | |
681 | continue; | |
682 | ||
683 | if (le16_to_cpu(status.wPortChange) & | |
684 | USB_PORT_STAT_C_CONNECTION) | |
685 | change++; | |
686 | } | |
687 | } | |
688 | ||
689 | return change; | |
690 | } | |
691 | ||
121a4d13 | 692 | static int usb_child_post_bind(struct udevice *dev) |
de31213f SG |
693 | { |
694 | struct usb_dev_platdata *plat = dev_get_parent_platdata(dev); | |
de31213f SG |
695 | int val; |
696 | ||
d20fd27d | 697 | if (!dev_of_valid(dev)) |
de31213f SG |
698 | return 0; |
699 | ||
700 | /* We only support matching a few things */ | |
d20fd27d | 701 | val = dev_read_u32_default(dev, "usb,device-class", -1); |
de31213f SG |
702 | if (val != -1) { |
703 | plat->id.match_flags |= USB_DEVICE_ID_MATCH_DEV_CLASS; | |
704 | plat->id.bDeviceClass = val; | |
705 | } | |
d20fd27d | 706 | val = dev_read_u32_default(dev, "usb,interface-class", -1); |
de31213f SG |
707 | if (val != -1) { |
708 | plat->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS; | |
709 | plat->id.bInterfaceClass = val; | |
710 | } | |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
f78a5c07 | 715 | struct udevice *usb_get_bus(struct udevice *dev) |
de31213f SG |
716 | { |
717 | struct udevice *bus; | |
718 | ||
de31213f SG |
719 | for (bus = dev; bus && device_get_uclass_id(bus) != UCLASS_USB; ) |
720 | bus = bus->parent; | |
721 | if (!bus) { | |
722 | /* By design this cannot happen */ | |
723 | assert(bus); | |
724 | debug("USB HUB '%s' does not have a controller\n", dev->name); | |
de31213f | 725 | } |
de31213f | 726 | |
f78a5c07 | 727 | return bus; |
de31213f SG |
728 | } |
729 | ||
730 | int usb_child_pre_probe(struct udevice *dev) | |
731 | { | |
bcbe3d15 | 732 | struct usb_device *udev = dev_get_parent_priv(dev); |
de31213f SG |
733 | struct usb_dev_platdata *plat = dev_get_parent_platdata(dev); |
734 | int ret; | |
735 | ||
7f1a0753 HG |
736 | if (plat->udev) { |
737 | /* | |
738 | * Copy over all the values set in the on stack struct | |
739 | * usb_device in usb_scan_device() to our final struct | |
740 | * usb_device for this dev. | |
741 | */ | |
742 | *udev = *(plat->udev); | |
743 | /* And clear plat->udev as it will not be valid for long */ | |
744 | plat->udev = NULL; | |
745 | udev->dev = dev; | |
746 | } else { | |
747 | /* | |
748 | * This happens with devices which are explicitly bound | |
749 | * instead of being discovered through usb_scan_device() | |
750 | * such as sandbox emul devices. | |
751 | */ | |
752 | udev->dev = dev; | |
753 | udev->controller_dev = usb_get_bus(dev); | |
754 | udev->devnum = plat->devnum; | |
de31213f | 755 | |
7f1a0753 HG |
756 | /* |
757 | * udev did not go through usb_scan_device(), so we need to | |
758 | * select the config and read the config descriptors. | |
759 | */ | |
760 | ret = usb_select_config(udev); | |
761 | if (ret) | |
762 | return ret; | |
763 | } | |
de31213f SG |
764 | |
765 | return 0; | |
766 | } | |
767 | ||
768 | UCLASS_DRIVER(usb) = { | |
769 | .id = UCLASS_USB, | |
770 | .name = "usb", | |
771 | .flags = DM_UC_FLAG_SEQ_ALIAS, | |
91195485 | 772 | .post_bind = dm_scan_fdt_dev, |
e253637b | 773 | .priv_auto_alloc_size = sizeof(struct usb_uclass_priv), |
de31213f SG |
774 | .per_child_auto_alloc_size = sizeof(struct usb_device), |
775 | .per_device_auto_alloc_size = sizeof(struct usb_bus_priv), | |
776 | .child_post_bind = usb_child_post_bind, | |
777 | .child_pre_probe = usb_child_pre_probe, | |
778 | .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata), | |
779 | }; | |
449230f0 SG |
780 | |
781 | UCLASS_DRIVER(usb_dev_generic) = { | |
782 | .id = UCLASS_USB_DEV_GENERIC, | |
783 | .name = "usb_dev_generic", | |
784 | }; | |
785 | ||
786 | U_BOOT_DRIVER(usb_dev_generic_drv) = { | |
787 | .id = UCLASS_USB_DEV_GENERIC, | |
788 | .name = "usb_dev_generic_drv", | |
789 | }; |