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