blob: 963464cff94d0b7cc57daad0d86d0765f89c82fd [file] [log] [blame]
Simon Glassde312132015-03-25 12:21:59 -06001/*
2 * (C) Copyright 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
Simon Glass0566e242015-03-25 12:22:30 -06005 * usb_match_device() modified from Linux kernel v4.0.
6 *
Simon Glassde312132015-03-25 12:21:59 -06007 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10#include <common.h>
11#include <dm.h>
12#include <errno.h>
13#include <usb.h>
14#include <dm/device-internal.h>
15#include <dm/lists.h>
16#include <dm/root.h>
17#include <dm/uclass-internal.h>
18
19DECLARE_GLOBAL_DATA_PTR;
20
21extern bool usb_started; /* flag for the started/stopped USB status */
22static bool asynch_allowed;
23
Hans de Goedee2536372015-05-10 14:10:21 +020024struct usb_uclass_priv {
25 int companion_device_count;
26};
27
Simon Glassde312132015-03-25 12:21:59 -060028int usb_disable_asynch(int disable)
29{
30 int old_value = asynch_allowed;
31
32 asynch_allowed = !disable;
33 return old_value;
34}
35
36int 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
48int 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);
Hans de Goedee2536372015-05-10 14:10:21 +020053 struct usb_uclass_priv *uc_priv = bus->uclass->priv;
54 int err;
Simon Glassde312132015-03-25 12:21:59 -060055
56 if (!ops->control)
57 return -ENOSYS;
58
Hans de Goedee2536372015-05-10 14:10:21 +020059 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;
Simon Glassde312132015-03-25 12:21:59 -060069}
70
71int 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
Hans de Goede8a5f0662015-05-10 14:10:18 +020083struct 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
97void *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
108int 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
Simon Glassde312132015-03-25 12:21:59 -0600119int 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
131int usb_stop(void)
132{
133 struct udevice *bus;
134 struct uclass *uc;
Hans de Goedee2536372015-05-10 14:10:21 +0200135 struct usb_uclass_priv *uc_priv;
Simon Glassde312132015-03-25 12:21:59 -0600136 int err = 0, ret;
137
138 /* De-activate any devices that have been activated */
139 ret = uclass_get(UCLASS_USB, &uc);
140 if (ret)
141 return ret;
Hans de Goedee2536372015-05-10 14:10:21 +0200142
143 uc_priv = uc->priv;
144
Simon Glassde312132015-03-25 12:21:59 -0600145 uclass_foreach_dev(bus, uc) {
146 ret = device_remove(bus);
147 if (ret && !err)
148 err = ret;
149 }
150
Simon Glass095fdef2015-03-25 12:22:38 -0600151#ifdef CONFIG_SANDBOX
152 struct udevice *dev;
153
154 /* Reset all enulation devices */
155 ret = uclass_get(UCLASS_USB_EMUL, &uc);
156 if (ret)
157 return ret;
158
159 uclass_foreach_dev(dev, uc)
160 usb_emul_reset(dev);
161#endif
Simon Glassde312132015-03-25 12:21:59 -0600162 usb_stor_reset();
163 usb_hub_reset();
Hans de Goedee2536372015-05-10 14:10:21 +0200164 uc_priv->companion_device_count = 0;
Simon Glassde312132015-03-25 12:21:59 -0600165 usb_started = 0;
166
167 return err;
168}
169
Hans de Goedea24a0e92015-05-10 14:10:19 +0200170static void usb_scan_bus(struct udevice *bus, bool recurse)
Simon Glassde312132015-03-25 12:21:59 -0600171{
172 struct usb_bus_priv *priv;
173 struct udevice *dev;
174 int ret;
175
176 priv = dev_get_uclass_priv(bus);
177
178 assert(recurse); /* TODO: Support non-recusive */
179
Hans de Goedea24a0e92015-05-10 14:10:19 +0200180 printf("scanning bus %d for devices... ", bus->seq);
181 debug("\n");
Simon Glassde312132015-03-25 12:21:59 -0600182 ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev);
183 if (ret)
Hans de Goedea24a0e92015-05-10 14:10:19 +0200184 printf("failed, error %d\n", ret);
185 else if (priv->next_addr == 0)
186 printf("No USB Device found\n");
187 else
188 printf("%d USB Device(s) found\n", priv->next_addr);
Simon Glassde312132015-03-25 12:21:59 -0600189}
190
191int usb_init(void)
192{
193 int controllers_initialized = 0;
Hans de Goedee2536372015-05-10 14:10:21 +0200194 struct usb_uclass_priv *uc_priv;
Hans de Goedeb6de4d12015-05-10 14:10:20 +0200195 struct usb_bus_priv *priv;
Simon Glassde312132015-03-25 12:21:59 -0600196 struct udevice *bus;
197 struct uclass *uc;
198 int count = 0;
199 int ret;
200
201 asynch_allowed = 1;
202 usb_hub_reset();
203
204 ret = uclass_get(UCLASS_USB, &uc);
205 if (ret)
206 return ret;
207
Hans de Goedee2536372015-05-10 14:10:21 +0200208 uc_priv = uc->priv;
209
Simon Glassde312132015-03-25 12:21:59 -0600210 uclass_foreach_dev(bus, uc) {
211 /* init low_level USB */
Hans de Goede134692a2015-05-04 21:33:26 +0200212 printf("USB%d: ", count);
Simon Glassde312132015-03-25 12:21:59 -0600213 count++;
Simon Glassde312132015-03-25 12:21:59 -0600214 ret = device_probe(bus);
215 if (ret == -ENODEV) { /* No such device. */
216 puts("Port not available.\n");
217 controllers_initialized++;
218 continue;
219 }
220
221 if (ret) { /* Other error. */
222 printf("probe failed, error %d\n", ret);
223 continue;
224 }
Simon Glassde312132015-03-25 12:21:59 -0600225 controllers_initialized++;
Simon Glassde312132015-03-25 12:21:59 -0600226 usb_started = true;
227 }
228
Hans de Goedeb6de4d12015-05-10 14:10:20 +0200229 /*
230 * lowlevel init done, now scan the bus for devices i.e. search HUBs
231 * and configure them, first scan primary controllers.
232 */
233 uclass_foreach_dev(bus, uc) {
234 if (!device_active(bus))
235 continue;
236
237 priv = dev_get_uclass_priv(bus);
238 if (!priv->companion)
239 usb_scan_bus(bus, true);
240 }
241
242 /*
243 * Now that the primary controllers have been scanned and have handed
244 * over any devices they do not understand to their companions, scan
Hans de Goedee2536372015-05-10 14:10:21 +0200245 * the companions if necessary.
Hans de Goedeb6de4d12015-05-10 14:10:20 +0200246 */
Hans de Goedee2536372015-05-10 14:10:21 +0200247 if (uc_priv->companion_device_count) {
248 uclass_foreach_dev(bus, uc) {
249 if (!device_active(bus))
250 continue;
Hans de Goedeb6de4d12015-05-10 14:10:20 +0200251
Hans de Goedee2536372015-05-10 14:10:21 +0200252 priv = dev_get_uclass_priv(bus);
253 if (priv->companion)
254 usb_scan_bus(bus, true);
255 }
Hans de Goedeb6de4d12015-05-10 14:10:20 +0200256 }
257
Simon Glassde312132015-03-25 12:21:59 -0600258 debug("scan end\n");
259 /* if we were not able to find at least one working bus, bail out */
260 if (!count)
261 printf("No controllers found\n");
262 else if (controllers_initialized == 0)
263 printf("USB error: all controllers failed lowlevel init\n");
264
265 return usb_started ? 0 : -1;
266}
267
268int usb_reset_root_port(void)
269{
270 return -ENOSYS;
271}
272
273static struct usb_device *find_child_devnum(struct udevice *parent, int devnum)
274{
275 struct usb_device *udev;
276 struct udevice *dev;
277
278 if (!device_active(parent))
279 return NULL;
280 udev = dev_get_parentdata(parent);
281 if (udev->devnum == devnum)
282 return udev;
283
284 for (device_find_first_child(parent, &dev);
285 dev;
286 device_find_next_child(&dev)) {
287 udev = find_child_devnum(dev, devnum);
288 if (udev)
289 return udev;
290 }
291
292 return NULL;
293}
294
295struct usb_device *usb_get_dev_index(struct udevice *bus, int index)
296{
297 struct udevice *hub;
298 int devnum = index + 1; /* Addresses are allocated from 1 on USB */
299
300 device_find_first_child(bus, &hub);
301 if (device_get_uclass_id(hub) == UCLASS_USB_HUB)
302 return find_child_devnum(hub, devnum);
303
304 return NULL;
305}
306
307int usb_post_bind(struct udevice *dev)
308{
309 /* Scan the bus for devices */
310 return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
311}
312
313int usb_port_reset(struct usb_device *parent, int portnr)
314{
315 unsigned short portstatus;
316 int ret;
317
318 debug("%s: start\n", __func__);
319
320 if (parent) {
321 /* reset the port for the second time */
322 assert(portnr > 0);
323 debug("%s: reset %d\n", __func__, portnr - 1);
324 ret = legacy_hub_port_reset(parent, portnr - 1, &portstatus);
325 if (ret < 0) {
326 printf("\n Couldn't reset port %i\n", portnr);
327 return ret;
328 }
329 } else {
330 debug("%s: reset root\n", __func__);
331 usb_reset_root_port();
332 }
333
334 return 0;
335}
336
337int usb_legacy_port_reset(struct usb_device *parent, int portnr)
338{
339 return usb_port_reset(parent, portnr);
340}
341
Simon Glassfbeceb22015-03-25 12:22:32 -0600342int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp)
343{
344 struct usb_platdata *plat;
345 struct udevice *dev;
346 int ret;
347
348 /* Find the old device and remove it */
349 ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
350 if (ret)
351 return ret;
352 ret = device_remove(dev);
353 if (ret)
354 return ret;
355
356 plat = dev_get_platdata(dev);
357 plat->init_type = USB_INIT_DEVICE;
358 ret = device_probe(dev);
359 if (ret)
360 return ret;
361 *ctlrp = dev_get_priv(dev);
362
363 return 0;
364}
365
Simon Glass0566e242015-03-25 12:22:30 -0600366/* returns 0 if no match, 1 if match */
367int usb_match_device(const struct usb_device_descriptor *desc,
368 const struct usb_device_id *id)
369{
370 if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
371 id->idVendor != le16_to_cpu(desc->idVendor))
372 return 0;
373
374 if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
375 id->idProduct != le16_to_cpu(desc->idProduct))
376 return 0;
377
378 /* No need to test id->bcdDevice_lo != 0, since 0 is never
379 greater than any unsigned number. */
380 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
381 (id->bcdDevice_lo > le16_to_cpu(desc->bcdDevice)))
382 return 0;
383
384 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
385 (id->bcdDevice_hi < le16_to_cpu(desc->bcdDevice)))
386 return 0;
387
388 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
389 (id->bDeviceClass != desc->bDeviceClass))
390 return 0;
391
392 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
393 (id->bDeviceSubClass != desc->bDeviceSubClass))
394 return 0;
395
396 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
397 (id->bDeviceProtocol != desc->bDeviceProtocol))
398 return 0;
399
400 return 1;
401}
402
403/* returns 0 if no match, 1 if match */
404int usb_match_one_id_intf(const struct usb_device_descriptor *desc,
405 const struct usb_interface_descriptor *int_desc,
406 const struct usb_device_id *id)
407{
408 /* The interface class, subclass, protocol and number should never be
409 * checked for a match if the device class is Vendor Specific,
410 * unless the match record specifies the Vendor ID. */
411 if (desc->bDeviceClass == USB_CLASS_VENDOR_SPEC &&
412 !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
413 (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS |
414 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
415 USB_DEVICE_ID_MATCH_INT_PROTOCOL |
416 USB_DEVICE_ID_MATCH_INT_NUMBER)))
417 return 0;
418
419 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
420 (id->bInterfaceClass != int_desc->bInterfaceClass))
421 return 0;
422
423 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
424 (id->bInterfaceSubClass != int_desc->bInterfaceSubClass))
425 return 0;
426
427 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
428 (id->bInterfaceProtocol != int_desc->bInterfaceProtocol))
429 return 0;
430
431 if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) &&
432 (id->bInterfaceNumber != int_desc->bInterfaceNumber))
433 return 0;
434
435 return 1;
436}
437
438/* returns 0 if no match, 1 if match */
439int usb_match_one_id(struct usb_device_descriptor *desc,
440 struct usb_interface_descriptor *int_desc,
441 const struct usb_device_id *id)
442{
443 if (!usb_match_device(desc, id))
444 return 0;
445
446 return usb_match_one_id_intf(desc, int_desc, id);
447}
448
449/**
450 * usb_find_and_bind_driver() - Find and bind the right USB driver
451 *
452 * This only looks at certain fields in the descriptor.
453 */
454static int usb_find_and_bind_driver(struct udevice *parent,
455 struct usb_device_descriptor *desc,
456 struct usb_interface_descriptor *iface,
457 int bus_seq, int devnum,
458 struct udevice **devp)
459{
460 struct usb_driver_entry *start, *entry;
461 int n_ents;
462 int ret;
463 char name[30], *str;
464
465 *devp = NULL;
466 debug("%s: Searching for driver\n", __func__);
467 start = ll_entry_start(struct usb_driver_entry, usb_driver_entry);
468 n_ents = ll_entry_count(struct usb_driver_entry, usb_driver_entry);
469 for (entry = start; entry != start + n_ents; entry++) {
470 const struct usb_device_id *id;
471 struct udevice *dev;
472 const struct driver *drv;
473 struct usb_dev_platdata *plat;
474
475 for (id = entry->match; id->match_flags; id++) {
476 if (!usb_match_one_id(desc, iface, id))
477 continue;
478
479 drv = entry->driver;
480 /*
481 * We could pass the descriptor to the driver as
482 * platdata (instead of NULL) and allow its bind()
483 * method to return -ENOENT if it doesn't support this
484 * device. That way we could continue the search to
485 * find another driver. For now this doesn't seem
486 * necesssary, so just bind the first match.
487 */
488 ret = device_bind(parent, drv, drv->name, NULL, -1,
489 &dev);
490 if (ret)
491 goto error;
492 debug("%s: Match found: %s\n", __func__, drv->name);
493 dev->driver_data = id->driver_info;
494 plat = dev_get_parent_platdata(dev);
495 plat->id = *id;
496 *devp = dev;
497 return 0;
498 }
499 }
500
Simon Glass449230f2015-03-25 12:22:31 -0600501 /* Bind a generic driver so that the device can be used */
502 snprintf(name, sizeof(name), "generic_bus_%x_dev_%x", bus_seq, devnum);
503 str = strdup(name);
504 if (!str)
505 return -ENOMEM;
506 ret = device_bind_driver(parent, "usb_dev_generic_drv", str, devp);
507
Simon Glass0566e242015-03-25 12:22:30 -0600508error:
509 debug("%s: No match found: %d\n", __func__, ret);
510 return ret;
511}
512
513/**
514 * usb_find_child() - Find an existing device which matches our needs
515 *
516 *
517 */
518static int usb_find_child(struct udevice *parent,
519 struct usb_device_descriptor *desc,
520 struct usb_interface_descriptor *iface,
521 struct udevice **devp)
522{
523 struct udevice *dev;
524
525 *devp = NULL;
526 for (device_find_first_child(parent, &dev);
527 dev;
528 device_find_next_child(&dev)) {
529 struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
530
531 /* If this device is already in use, skip it */
532 if (device_active(dev))
533 continue;
534 debug(" %s: name='%s', plat=%d, desc=%d\n", __func__,
535 dev->name, plat->id.bDeviceClass, desc->bDeviceClass);
536 if (usb_match_one_id(desc, iface, &plat->id)) {
537 *devp = dev;
538 return 0;
539 }
540 }
541
542 return -ENOENT;
543}
544
Simon Glassde312132015-03-25 12:21:59 -0600545int usb_scan_device(struct udevice *parent, int port,
546 enum usb_device_speed speed, struct udevice **devp)
547{
548 struct udevice *dev;
549 bool created = false;
550 struct usb_dev_platdata *plat;
551 struct usb_bus_priv *priv;
552 struct usb_device *parent_udev;
553 int ret;
554 ALLOC_CACHE_ALIGN_BUFFER(struct usb_device, udev, 1);
555 struct usb_interface_descriptor *iface = &udev->config.if_desc[0].desc;
556
557 *devp = NULL;
558 memset(udev, '\0', sizeof(*udev));
Hans de Goedef78a5c02015-05-05 11:54:31 +0200559 udev->controller_dev = usb_get_bus(parent);
Simon Glassde312132015-03-25 12:21:59 -0600560 priv = dev_get_uclass_priv(udev->controller_dev);
561
562 /*
563 * Somewhat nasty, this. We create a local device and use the normal
564 * USB stack to read its descriptor. Then we know what type of device
565 * to create for real.
566 *
567 * udev->dev is set to the parent, since we don't have a real device
568 * yet. The USB stack should not access udev.dev anyway, except perhaps
569 * to find the controller, and the controller will either be @parent,
570 * or some parent of @parent.
571 *
572 * Another option might be to create the device as a generic USB
573 * device, then morph it into the correct one when we know what it
574 * should be. This means that a generic USB device would morph into
575 * a network controller, or a USB flash stick, for example. However,
576 * we don't support such morphing and it isn't clear that it would
577 * be easy to do.
578 *
579 * Yet another option is to split out the USB stack parts of udev
580 * into something like a 'struct urb' (as Linux does) which can exist
581 * independently of any device. This feels cleaner, but calls for quite
582 * a big change to the USB stack.
583 *
584 * For now, the approach is to set up an empty udev, read its
585 * descriptor and assign it an address, then bind a real device and
586 * stash the resulting information into the device's parent
587 * platform data. Then when we probe it, usb_child_pre_probe() is called
588 * and it will pull the information out of the stash.
589 */
590 udev->dev = parent;
591 udev->speed = speed;
592 udev->devnum = priv->next_addr + 1;
593 udev->portnr = port;
594 debug("Calling usb_setup_device(), portnr=%d\n", udev->portnr);
595 parent_udev = device_get_uclass_id(parent) == UCLASS_USB_HUB ?
596 dev_get_parentdata(parent) : NULL;
597 ret = usb_setup_device(udev, priv->desc_before_addr, parent_udev, port);
598 debug("read_descriptor for '%s': ret=%d\n", parent->name, ret);
599 if (ret)
600 return ret;
601 ret = usb_find_child(parent, &udev->descriptor, iface, &dev);
602 debug("** usb_find_child returns %d\n", ret);
Simon Glass0566e242015-03-25 12:22:30 -0600603 if (ret) {
604 if (ret != -ENOENT)
605 return ret;
606 ret = usb_find_and_bind_driver(parent, &udev->descriptor, iface,
607 udev->controller_dev->seq,
608 udev->devnum, &dev);
609 if (ret)
610 return ret;
611 created = true;
612 }
613 plat = dev_get_parent_platdata(dev);
614 debug("%s: Probing '%s', plat=%p\n", __func__, dev->name, plat);
615 plat->devnum = udev->devnum;
Hans de Goede7f1a0752015-05-05 11:54:32 +0200616 plat->udev = udev;
Simon Glass0566e242015-03-25 12:22:30 -0600617 priv->next_addr++;
618 ret = device_probe(dev);
619 if (ret) {
620 debug("%s: Device '%s' probe failed\n", __func__, dev->name);
621 priv->next_addr--;
622 if (created)
623 device_unbind(dev);
624 return ret;
625 }
626 *devp = dev;
Simon Glassde312132015-03-25 12:21:59 -0600627
Simon Glass0566e242015-03-25 12:22:30 -0600628 return 0;
Simon Glassde312132015-03-25 12:21:59 -0600629}
630
631int usb_child_post_bind(struct udevice *dev)
632{
633 struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
634 const void *blob = gd->fdt_blob;
635 int val;
636
637 if (dev->of_offset == -1)
638 return 0;
639
640 /* We only support matching a few things */
641 val = fdtdec_get_int(blob, dev->of_offset, "usb,device-class", -1);
642 if (val != -1) {
643 plat->id.match_flags |= USB_DEVICE_ID_MATCH_DEV_CLASS;
644 plat->id.bDeviceClass = val;
645 }
646 val = fdtdec_get_int(blob, dev->of_offset, "usb,interface-class", -1);
647 if (val != -1) {
648 plat->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS;
649 plat->id.bInterfaceClass = val;
650 }
651
652 return 0;
653}
654
Hans de Goedef78a5c02015-05-05 11:54:31 +0200655struct udevice *usb_get_bus(struct udevice *dev)
Simon Glassde312132015-03-25 12:21:59 -0600656{
657 struct udevice *bus;
658
Simon Glassde312132015-03-25 12:21:59 -0600659 for (bus = dev; bus && device_get_uclass_id(bus) != UCLASS_USB; )
660 bus = bus->parent;
661 if (!bus) {
662 /* By design this cannot happen */
663 assert(bus);
664 debug("USB HUB '%s' does not have a controller\n", dev->name);
Simon Glassde312132015-03-25 12:21:59 -0600665 }
Simon Glassde312132015-03-25 12:21:59 -0600666
Hans de Goedef78a5c02015-05-05 11:54:31 +0200667 return bus;
Simon Glassde312132015-03-25 12:21:59 -0600668}
669
670int usb_child_pre_probe(struct udevice *dev)
671{
Simon Glassde312132015-03-25 12:21:59 -0600672 struct usb_device *udev = dev_get_parentdata(dev);
673 struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
674 int ret;
675
Hans de Goede7f1a0752015-05-05 11:54:32 +0200676 if (plat->udev) {
677 /*
678 * Copy over all the values set in the on stack struct
679 * usb_device in usb_scan_device() to our final struct
680 * usb_device for this dev.
681 */
682 *udev = *(plat->udev);
683 /* And clear plat->udev as it will not be valid for long */
684 plat->udev = NULL;
685 udev->dev = dev;
686 } else {
687 /*
688 * This happens with devices which are explicitly bound
689 * instead of being discovered through usb_scan_device()
690 * such as sandbox emul devices.
691 */
692 udev->dev = dev;
693 udev->controller_dev = usb_get_bus(dev);
694 udev->devnum = plat->devnum;
Simon Glassde312132015-03-25 12:21:59 -0600695
Hans de Goede7f1a0752015-05-05 11:54:32 +0200696 /*
697 * udev did not go through usb_scan_device(), so we need to
698 * select the config and read the config descriptors.
699 */
700 ret = usb_select_config(udev);
701 if (ret)
702 return ret;
703 }
Simon Glassde312132015-03-25 12:21:59 -0600704
705 return 0;
706}
707
708UCLASS_DRIVER(usb) = {
709 .id = UCLASS_USB,
710 .name = "usb",
711 .flags = DM_UC_FLAG_SEQ_ALIAS,
712 .post_bind = usb_post_bind,
Hans de Goedee2536372015-05-10 14:10:21 +0200713 .priv_auto_alloc_size = sizeof(struct usb_uclass_priv),
Simon Glassde312132015-03-25 12:21:59 -0600714 .per_child_auto_alloc_size = sizeof(struct usb_device),
715 .per_device_auto_alloc_size = sizeof(struct usb_bus_priv),
716 .child_post_bind = usb_child_post_bind,
717 .child_pre_probe = usb_child_pre_probe,
718 .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
719};
Simon Glass449230f2015-03-25 12:22:31 -0600720
721UCLASS_DRIVER(usb_dev_generic) = {
722 .id = UCLASS_USB_DEV_GENERIC,
723 .name = "usb_dev_generic",
724};
725
726U_BOOT_DRIVER(usb_dev_generic_drv) = {
727 .id = UCLASS_USB_DEV_GENERIC,
728 .name = "usb_dev_generic_drv",
729};