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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Most of this source has been derived from the Linux USB
4  * project:
5  * (C) Copyright Linus Torvalds 1999
6  * (C) Copyright Johannes Erdfelt 1999-2001
7  * (C) Copyright Andreas Gal 1999
8  * (C) Copyright Gregory P. Smith 1999
9  * (C) Copyright Deti Fliegl 1999 (new USB architecture)
10  * (C) Copyright Randy Dunlap 2000
11  * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
12  * (C) Copyright Yggdrasil Computing, Inc. 2000
13  *     (usb_device_id matching changes by Adam J. Richter)
14  *
15  * Adapted for U-Boot:
16  * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
17  */
18 
19 /*
20  * How it works:
21  *
22  * Since this is a bootloader, the devices will not be automatic
23  * (re)configured on hotplug, but after a restart of the USB the
24  * device should work.
25  *
26  * For each transfer (except "Interrupt") we wait for completion.
27  */
28 #include <common.h>
29 #include <command.h>
30 #include <dm.h>
31 #include <memalign.h>
32 #include <asm/processor.h>
33 #include <linux/compiler.h>
34 #include <linux/ctype.h>
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
37 #include <errno.h>
38 #include <usb.h>
39 
40 #define USB_BUFSIZ	512
41 
42 static int asynch_allowed;
43 char usb_started; /* flag for the started/stopped USB status */
44 
45 #ifndef CONFIG_DM_USB
46 static struct usb_device usb_dev[USB_MAX_DEVICE];
47 static int dev_index;
48 
49 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
50 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
51 #endif
52 
53 /***************************************************************************
54  * Init USB Device
55  */
usb_init(void)56 int usb_init(void)
57 {
58 	void *ctrl;
59 	struct usb_device *dev;
60 	int i, start_index = 0;
61 	int controllers_initialized = 0;
62 	int ret;
63 
64 	dev_index = 0;
65 	asynch_allowed = 1;
66 	usb_hub_reset();
67 
68 	/* first make all devices unknown */
69 	for (i = 0; i < USB_MAX_DEVICE; i++) {
70 		memset(&usb_dev[i], 0, sizeof(struct usb_device));
71 		usb_dev[i].devnum = -1;
72 	}
73 
74 	/* init low_level USB */
75 	for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
76 		/* init low_level USB */
77 		printf("USB%d:   ", i);
78 		ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl);
79 		if (ret == -ENODEV) {	/* No such device. */
80 			puts("Port not available.\n");
81 			controllers_initialized++;
82 			continue;
83 		}
84 
85 		if (ret) {		/* Other error. */
86 			puts("lowlevel init failed\n");
87 			continue;
88 		}
89 		/*
90 		 * lowlevel init is OK, now scan the bus for devices
91 		 * i.e. search HUBs and configure them
92 		 */
93 		controllers_initialized++;
94 		start_index = dev_index;
95 		printf("scanning bus %d for devices... ", i);
96 		ret = usb_alloc_new_device(ctrl, &dev);
97 		if (ret)
98 			break;
99 
100 		/*
101 		 * device 0 is always present
102 		 * (root hub, so let it analyze)
103 		 */
104 		ret = usb_new_device(dev);
105 		if (ret)
106 			usb_free_device(dev->controller);
107 
108 		if (start_index == dev_index) {
109 			puts("No USB Device found\n");
110 			continue;
111 		} else {
112 			printf("%d USB Device(s) found\n",
113 				dev_index - start_index);
114 		}
115 
116 		usb_started = 1;
117 	}
118 
119 	debug("scan end\n");
120 	/* if we were not able to find at least one working bus, bail out */
121 	if (controllers_initialized == 0)
122 		puts("USB error: all controllers failed lowlevel init\n");
123 
124 	return usb_started ? 0 : -ENODEV;
125 }
126 
127 /******************************************************************************
128  * Stop USB this stops the LowLevel Part and deregisters USB devices.
129  */
usb_stop(void)130 int usb_stop(void)
131 {
132 	int i;
133 
134 	if (usb_started) {
135 		asynch_allowed = 1;
136 		usb_started = 0;
137 		usb_hub_reset();
138 
139 		for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
140 			if (usb_lowlevel_stop(i))
141 				printf("failed to stop USB controller %d\n", i);
142 		}
143 	}
144 
145 	return 0;
146 }
147 
148 /******************************************************************************
149  * Detect if a USB device has been plugged or unplugged.
150  */
usb_detect_change(void)151 int usb_detect_change(void)
152 {
153 	int i, j;
154 	int change = 0;
155 
156 	for (j = 0; j < USB_MAX_DEVICE; j++) {
157 		for (i = 0; i < usb_dev[j].maxchild; i++) {
158 			struct usb_port_status status;
159 
160 			if (usb_get_port_status(&usb_dev[j], i + 1,
161 						&status) < 0)
162 				/* USB request failed */
163 				continue;
164 
165 			if (le16_to_cpu(status.wPortChange) &
166 			    USB_PORT_STAT_C_CONNECTION)
167 				change++;
168 		}
169 	}
170 
171 	return change;
172 }
173 
174 /*
175  * disables the asynch behaviour of the control message. This is used for data
176  * transfers that uses the exclusiv access to the control and bulk messages.
177  * Returns the old value so it can be restored later.
178  */
usb_disable_asynch(int disable)179 int usb_disable_asynch(int disable)
180 {
181 	int old_value = asynch_allowed;
182 
183 	asynch_allowed = !disable;
184 	return old_value;
185 }
186 #endif /* !CONFIG_DM_USB */
187 
188 
189 /*-------------------------------------------------------------------
190  * Message wrappers.
191  *
192  */
193 
194 /*
195  * submits an Interrupt Message
196  */
usb_submit_int_msg(struct usb_device * dev,unsigned long pipe,void * buffer,int transfer_len,int interval)197 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
198 			void *buffer, int transfer_len, int interval)
199 {
200 	return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
201 }
202 
203 /*
204  * submits a control message and waits for comletion (at least timeout * 1ms)
205  * If timeout is 0, we don't wait for completion (used as example to set and
206  * clear keyboards LEDs). For data transfers, (storage transfers) we don't
207  * allow control messages with 0 timeout, by previousely resetting the flag
208  * asynch_allowed (usb_disable_asynch(1)).
209  * returns the transferred length if OK or -1 if error. The transferred length
210  * and the current status are stored in the dev->act_len and dev->status.
211  */
usb_control_msg(struct usb_device * dev,unsigned int pipe,unsigned char request,unsigned char requesttype,unsigned short value,unsigned short index,void * data,unsigned short size,int timeout)212 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
213 			unsigned char request, unsigned char requesttype,
214 			unsigned short value, unsigned short index,
215 			void *data, unsigned short size, int timeout)
216 {
217 	ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
218 	int err;
219 
220 	if ((timeout == 0) && (!asynch_allowed)) {
221 		/* request for a asynch control pipe is not allowed */
222 		return -EINVAL;
223 	}
224 
225 	/* set setup command */
226 	setup_packet->requesttype = requesttype;
227 	setup_packet->request = request;
228 	setup_packet->value = cpu_to_le16(value);
229 	setup_packet->index = cpu_to_le16(index);
230 	setup_packet->length = cpu_to_le16(size);
231 	debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
232 	      "value 0x%X index 0x%X length 0x%X\n",
233 	      request, requesttype, value, index, size);
234 	dev->status = USB_ST_NOT_PROC; /*not yet processed */
235 
236 	err = submit_control_msg(dev, pipe, data, size, setup_packet);
237 	if (err < 0)
238 		return err;
239 	if (timeout == 0)
240 		return (int)size;
241 
242 	/*
243 	 * Wait for status to update until timeout expires, USB driver
244 	 * interrupt handler may set the status when the USB operation has
245 	 * been completed.
246 	 */
247 	while (timeout--) {
248 		if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
249 			break;
250 		mdelay(1);
251 	}
252 	if (dev->status)
253 		return -1;
254 
255 	return dev->act_len;
256 
257 }
258 
259 /*-------------------------------------------------------------------
260  * submits bulk message, and waits for completion. returns 0 if Ok or
261  * negative if Error.
262  * synchronous behavior
263  */
usb_bulk_msg(struct usb_device * dev,unsigned int pipe,void * data,int len,int * actual_length,int timeout)264 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
265 			void *data, int len, int *actual_length, int timeout)
266 {
267 	if (len < 0)
268 		return -EINVAL;
269 	dev->status = USB_ST_NOT_PROC; /*not yet processed */
270 	if (submit_bulk_msg(dev, pipe, data, len) < 0)
271 		return -EIO;
272 	while (timeout--) {
273 		if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
274 			break;
275 		mdelay(1);
276 	}
277 	*actual_length = dev->act_len;
278 	if (dev->status == 0)
279 		return 0;
280 	else
281 		return -EIO;
282 }
283 
284 
285 /*-------------------------------------------------------------------
286  * Max Packet stuff
287  */
288 
289 /*
290  * returns the max packet size, depending on the pipe direction and
291  * the configurations values
292  */
usb_maxpacket(struct usb_device * dev,unsigned long pipe)293 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
294 {
295 	/* direction is out -> use emaxpacket out */
296 	if ((pipe & USB_DIR_IN) == 0)
297 		return dev->epmaxpacketout[((pipe>>15) & 0xf)];
298 	else
299 		return dev->epmaxpacketin[((pipe>>15) & 0xf)];
300 }
301 
302 /*
303  * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
304  * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
305  * when it is inlined in 1 single routine. What happens is that the register r3
306  * is used as loop-count 'i', but gets overwritten later on.
307  * This is clearly a compiler bug, but it is easier to workaround it here than
308  * to update the compiler (Occurs with at least several GCC 4.{1,2},x
309  * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
310  *
311  * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
312  */
313 static void noinline
usb_set_maxpacket_ep(struct usb_device * dev,int if_idx,int ep_idx)314 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
315 {
316 	int b;
317 	struct usb_endpoint_descriptor *ep;
318 	u16 ep_wMaxPacketSize;
319 
320 	ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
321 
322 	b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
323 	ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
324 
325 	if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
326 						USB_ENDPOINT_XFER_CONTROL) {
327 		/* Control => bidirectional */
328 		dev->epmaxpacketout[b] = ep_wMaxPacketSize;
329 		dev->epmaxpacketin[b] = ep_wMaxPacketSize;
330 		debug("##Control EP epmaxpacketout/in[%d] = %d\n",
331 		      b, dev->epmaxpacketin[b]);
332 	} else {
333 		if ((ep->bEndpointAddress & 0x80) == 0) {
334 			/* OUT Endpoint */
335 			if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
336 				dev->epmaxpacketout[b] = ep_wMaxPacketSize;
337 				debug("##EP epmaxpacketout[%d] = %d\n",
338 				      b, dev->epmaxpacketout[b]);
339 			}
340 		} else {
341 			/* IN Endpoint */
342 			if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
343 				dev->epmaxpacketin[b] = ep_wMaxPacketSize;
344 				debug("##EP epmaxpacketin[%d] = %d\n",
345 				      b, dev->epmaxpacketin[b]);
346 			}
347 		} /* if out */
348 	} /* if control */
349 }
350 
351 /*
352  * set the max packed value of all endpoints in the given configuration
353  */
usb_set_maxpacket(struct usb_device * dev)354 static int usb_set_maxpacket(struct usb_device *dev)
355 {
356 	int i, ii;
357 
358 	for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
359 		for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
360 			usb_set_maxpacket_ep(dev, i, ii);
361 
362 	return 0;
363 }
364 
365 /*******************************************************************************
366  * Parse the config, located in buffer, and fills the dev->config structure.
367  * Note that all little/big endian swapping are done automatically.
368  * (wTotalLength has already been swapped and sanitized when it was read.)
369  */
usb_parse_config(struct usb_device * dev,unsigned char * buffer,int cfgno)370 static int usb_parse_config(struct usb_device *dev,
371 			unsigned char *buffer, int cfgno)
372 {
373 	struct usb_descriptor_header *head;
374 	int index, ifno, epno, curr_if_num;
375 	u16 ep_wMaxPacketSize;
376 	struct usb_interface *if_desc = NULL;
377 
378 	ifno = -1;
379 	epno = -1;
380 	curr_if_num = -1;
381 
382 	dev->configno = cfgno;
383 	head = (struct usb_descriptor_header *) &buffer[0];
384 	if (head->bDescriptorType != USB_DT_CONFIG) {
385 		printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
386 			head->bDescriptorType);
387 		return -EINVAL;
388 	}
389 	if (head->bLength != USB_DT_CONFIG_SIZE) {
390 		printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
391 		return -EINVAL;
392 	}
393 	memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
394 	dev->config.no_of_if = 0;
395 
396 	index = dev->config.desc.bLength;
397 	/* Ok the first entry must be a configuration entry,
398 	 * now process the others */
399 	head = (struct usb_descriptor_header *) &buffer[index];
400 	while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
401 		switch (head->bDescriptorType) {
402 		case USB_DT_INTERFACE:
403 			if (head->bLength != USB_DT_INTERFACE_SIZE) {
404 				printf("ERROR: Invalid USB IF length (%d)\n",
405 					head->bLength);
406 				break;
407 			}
408 			if (index + USB_DT_INTERFACE_SIZE >
409 			    dev->config.desc.wTotalLength) {
410 				puts("USB IF descriptor overflowed buffer!\n");
411 				break;
412 			}
413 			if (((struct usb_interface_descriptor *) \
414 			     head)->bInterfaceNumber != curr_if_num) {
415 				/* this is a new interface, copy new desc */
416 				ifno = dev->config.no_of_if;
417 				if (ifno >= USB_MAXINTERFACES) {
418 					puts("Too many USB interfaces!\n");
419 					/* try to go on with what we have */
420 					return -EINVAL;
421 				}
422 				if_desc = &dev->config.if_desc[ifno];
423 				dev->config.no_of_if++;
424 				memcpy(if_desc, head,
425 					USB_DT_INTERFACE_SIZE);
426 				if_desc->no_of_ep = 0;
427 				if_desc->num_altsetting = 1;
428 				curr_if_num =
429 				     if_desc->desc.bInterfaceNumber;
430 			} else {
431 				/* found alternate setting for the interface */
432 				if (ifno >= 0) {
433 					if_desc = &dev->config.if_desc[ifno];
434 					if_desc->num_altsetting++;
435 				}
436 			}
437 			break;
438 		case USB_DT_ENDPOINT:
439 			if (head->bLength != USB_DT_ENDPOINT_SIZE &&
440 			    head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
441 				printf("ERROR: Invalid USB EP length (%d)\n",
442 					head->bLength);
443 				break;
444 			}
445 			if (index + head->bLength >
446 			    dev->config.desc.wTotalLength) {
447 				puts("USB EP descriptor overflowed buffer!\n");
448 				break;
449 			}
450 			if (ifno < 0) {
451 				puts("Endpoint descriptor out of order!\n");
452 				break;
453 			}
454 			epno = dev->config.if_desc[ifno].no_of_ep;
455 			if_desc = &dev->config.if_desc[ifno];
456 			if (epno >= USB_MAXENDPOINTS) {
457 				printf("Interface %d has too many endpoints!\n",
458 					if_desc->desc.bInterfaceNumber);
459 				return -EINVAL;
460 			}
461 			/* found an endpoint */
462 			if_desc->no_of_ep++;
463 			memcpy(&if_desc->ep_desc[epno], head,
464 				USB_DT_ENDPOINT_SIZE);
465 			ep_wMaxPacketSize = get_unaligned(&dev->config.\
466 							if_desc[ifno].\
467 							ep_desc[epno].\
468 							wMaxPacketSize);
469 			put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
470 					&dev->config.\
471 					if_desc[ifno].\
472 					ep_desc[epno].\
473 					wMaxPacketSize);
474 			debug("if %d, ep %d\n", ifno, epno);
475 			break;
476 		case USB_DT_SS_ENDPOINT_COMP:
477 			if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
478 				printf("ERROR: Invalid USB EPC length (%d)\n",
479 					head->bLength);
480 				break;
481 			}
482 			if (index + USB_DT_SS_EP_COMP_SIZE >
483 			    dev->config.desc.wTotalLength) {
484 				puts("USB EPC descriptor overflowed buffer!\n");
485 				break;
486 			}
487 			if (ifno < 0 || epno < 0) {
488 				puts("EPC descriptor out of order!\n");
489 				break;
490 			}
491 			if_desc = &dev->config.if_desc[ifno];
492 			memcpy(&if_desc->ss_ep_comp_desc[epno], head,
493 				USB_DT_SS_EP_COMP_SIZE);
494 			break;
495 		default:
496 			if (head->bLength == 0)
497 				return -EINVAL;
498 
499 			debug("unknown Description Type : %x\n",
500 			      head->bDescriptorType);
501 
502 #ifdef DEBUG
503 			{
504 				unsigned char *ch = (unsigned char *)head;
505 				int i;
506 
507 				for (i = 0; i < head->bLength; i++)
508 					debug("%02X ", *ch++);
509 				debug("\n\n\n");
510 			}
511 #endif
512 			break;
513 		}
514 		index += head->bLength;
515 		head = (struct usb_descriptor_header *)&buffer[index];
516 	}
517 	return 0;
518 }
519 
520 /***********************************************************************
521  * Clears an endpoint
522  * endp: endpoint number in bits 0-3;
523  * direction flag in bit 7 (1 = IN, 0 = OUT)
524  */
usb_clear_halt(struct usb_device * dev,int pipe)525 int usb_clear_halt(struct usb_device *dev, int pipe)
526 {
527 	int result;
528 	int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
529 
530 	result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
531 				 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
532 				 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
533 
534 	/* don't clear if failed */
535 	if (result < 0)
536 		return result;
537 
538 	/*
539 	 * NOTE: we do not get status and verify reset was successful
540 	 * as some devices are reported to lock up upon this check..
541 	 */
542 
543 	usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
544 
545 	/* toggle is reset on clear */
546 	usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
547 	return 0;
548 }
549 
550 
551 /**********************************************************************
552  * get_descriptor type
553  */
usb_get_descriptor(struct usb_device * dev,unsigned char type,unsigned char index,void * buf,int size)554 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
555 			unsigned char index, void *buf, int size)
556 {
557 	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
558 			       USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
559 			       (type << 8) + index, 0, buf, size,
560 			       USB_CNTL_TIMEOUT);
561 }
562 
563 /**********************************************************************
564  * gets len of configuration cfgno
565  */
usb_get_configuration_len(struct usb_device * dev,int cfgno)566 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
567 {
568 	int result;
569 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
570 	struct usb_config_descriptor *config;
571 
572 	config = (struct usb_config_descriptor *)&buffer[0];
573 	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
574 	if (result < 9) {
575 		if (result < 0)
576 			printf("unable to get descriptor, error %lX\n",
577 				dev->status);
578 		else
579 			printf("config descriptor too short " \
580 				"(expected %i, got %i)\n", 9, result);
581 		return -EIO;
582 	}
583 	return le16_to_cpu(config->wTotalLength);
584 }
585 
586 /**********************************************************************
587  * gets configuration cfgno and store it in the buffer
588  */
usb_get_configuration_no(struct usb_device * dev,int cfgno,unsigned char * buffer,int length)589 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
590 			     unsigned char *buffer, int length)
591 {
592 	int result;
593 	struct usb_config_descriptor *config;
594 
595 	config = (struct usb_config_descriptor *)&buffer[0];
596 	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
597 	debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
598 	      le16_to_cpu(config->wTotalLength));
599 	config->wTotalLength = result; /* validated, with CPU byte order */
600 
601 	return result;
602 }
603 
604 /********************************************************************
605  * set address of a device to the value in dev->devnum.
606  * This can only be done by addressing the device via the default address (0)
607  */
usb_set_address(struct usb_device * dev)608 static int usb_set_address(struct usb_device *dev)
609 {
610 	debug("set address %d\n", dev->devnum);
611 
612 	return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
613 			       0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
614 }
615 
616 /********************************************************************
617  * set interface number to interface
618  */
usb_set_interface(struct usb_device * dev,int interface,int alternate)619 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
620 {
621 	struct usb_interface *if_face = NULL;
622 	int ret, i;
623 
624 	for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
625 		if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
626 			if_face = &dev->config.if_desc[i];
627 			break;
628 		}
629 	}
630 	if (!if_face) {
631 		printf("selecting invalid interface %d", interface);
632 		return -EINVAL;
633 	}
634 	/*
635 	 * We should return now for devices with only one alternate setting.
636 	 * According to 9.4.10 of the Universal Serial Bus Specification
637 	 * Revision 2.0 such devices can return with a STALL. This results in
638 	 * some USB sticks timeouting during initialization and then being
639 	 * unusable in U-Boot.
640 	 */
641 	if (if_face->num_altsetting == 1)
642 		return 0;
643 
644 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
645 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
646 				alternate, interface, NULL, 0,
647 				USB_CNTL_TIMEOUT * 5);
648 	if (ret < 0)
649 		return ret;
650 
651 	return 0;
652 }
653 
654 /********************************************************************
655  * set configuration number to configuration
656  */
usb_set_configuration(struct usb_device * dev,int configuration)657 static int usb_set_configuration(struct usb_device *dev, int configuration)
658 {
659 	int res;
660 	debug("set configuration %d\n", configuration);
661 	/* set setup command */
662 	res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
663 				USB_REQ_SET_CONFIGURATION, 0,
664 				configuration, 0,
665 				NULL, 0, USB_CNTL_TIMEOUT);
666 	if (res == 0) {
667 		dev->toggle[0] = 0;
668 		dev->toggle[1] = 0;
669 		return 0;
670 	} else
671 		return -EIO;
672 }
673 
674 /********************************************************************
675  * set protocol to protocol
676  */
usb_set_protocol(struct usb_device * dev,int ifnum,int protocol)677 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
678 {
679 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
680 		USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
681 		protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
682 }
683 
684 /********************************************************************
685  * set idle
686  */
usb_set_idle(struct usb_device * dev,int ifnum,int duration,int report_id)687 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
688 {
689 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
690 		USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
691 		(duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
692 }
693 
694 /********************************************************************
695  * get report
696  */
usb_get_report(struct usb_device * dev,int ifnum,unsigned char type,unsigned char id,void * buf,int size)697 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
698 		   unsigned char id, void *buf, int size)
699 {
700 	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
701 			USB_REQ_GET_REPORT,
702 			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
703 			(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
704 }
705 
706 /********************************************************************
707  * get class descriptor
708  */
usb_get_class_descriptor(struct usb_device * dev,int ifnum,unsigned char type,unsigned char id,void * buf,int size)709 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
710 		unsigned char type, unsigned char id, void *buf, int size)
711 {
712 	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
713 		USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
714 		(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
715 }
716 
717 /********************************************************************
718  * get string index in buffer
719  */
usb_get_string(struct usb_device * dev,unsigned short langid,unsigned char index,void * buf,int size)720 static int usb_get_string(struct usb_device *dev, unsigned short langid,
721 		   unsigned char index, void *buf, int size)
722 {
723 	int i;
724 	int result;
725 
726 	for (i = 0; i < 3; ++i) {
727 		/* some devices are flaky */
728 		result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
729 			USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
730 			(USB_DT_STRING << 8) + index, langid, buf, size,
731 			USB_CNTL_TIMEOUT);
732 
733 		if (result > 0)
734 			break;
735 	}
736 
737 	return result;
738 }
739 
740 
usb_try_string_workarounds(unsigned char * buf,int * length)741 static void usb_try_string_workarounds(unsigned char *buf, int *length)
742 {
743 	int newlength, oldlength = *length;
744 
745 	for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
746 		if (!isprint(buf[newlength]) || buf[newlength + 1])
747 			break;
748 
749 	if (newlength > 2) {
750 		buf[0] = newlength;
751 		*length = newlength;
752 	}
753 }
754 
755 
usb_string_sub(struct usb_device * dev,unsigned int langid,unsigned int index,unsigned char * buf)756 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
757 		unsigned int index, unsigned char *buf)
758 {
759 	int rc;
760 
761 	/* Try to read the string descriptor by asking for the maximum
762 	 * possible number of bytes */
763 	rc = usb_get_string(dev, langid, index, buf, 255);
764 
765 	/* If that failed try to read the descriptor length, then
766 	 * ask for just that many bytes */
767 	if (rc < 2) {
768 		rc = usb_get_string(dev, langid, index, buf, 2);
769 		if (rc == 2)
770 			rc = usb_get_string(dev, langid, index, buf, buf[0]);
771 	}
772 
773 	if (rc >= 2) {
774 		if (!buf[0] && !buf[1])
775 			usb_try_string_workarounds(buf, &rc);
776 
777 		/* There might be extra junk at the end of the descriptor */
778 		if (buf[0] < rc)
779 			rc = buf[0];
780 
781 		rc = rc - (rc & 1); /* force a multiple of two */
782 	}
783 
784 	if (rc < 2)
785 		rc = -EINVAL;
786 
787 	return rc;
788 }
789 
790 
791 /********************************************************************
792  * usb_string:
793  * Get string index and translate it to ascii.
794  * returns string length (> 0) or error (< 0)
795  */
usb_string(struct usb_device * dev,int index,char * buf,size_t size)796 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
797 {
798 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
799 	unsigned char *tbuf;
800 	int err;
801 	unsigned int u, idx;
802 
803 	if (size <= 0 || !buf || !index)
804 		return -EINVAL;
805 	buf[0] = 0;
806 	tbuf = &mybuf[0];
807 
808 	/* get langid for strings if it's not yet known */
809 	if (!dev->have_langid) {
810 		err = usb_string_sub(dev, 0, 0, tbuf);
811 		if (err < 0) {
812 			debug("error getting string descriptor 0 " \
813 			      "(error=%lx)\n", dev->status);
814 			return -EIO;
815 		} else if (tbuf[0] < 4) {
816 			debug("string descriptor 0 too short\n");
817 			return -EIO;
818 		} else {
819 			dev->have_langid = -1;
820 			dev->string_langid = tbuf[2] | (tbuf[3] << 8);
821 				/* always use the first langid listed */
822 			debug("USB device number %d default " \
823 			      "language ID 0x%x\n",
824 			      dev->devnum, dev->string_langid);
825 		}
826 	}
827 
828 	err = usb_string_sub(dev, dev->string_langid, index, tbuf);
829 	if (err < 0)
830 		return err;
831 
832 	size--;		/* leave room for trailing NULL char in output buffer */
833 	for (idx = 0, u = 2; u < err; u += 2) {
834 		if (idx >= size)
835 			break;
836 		if (tbuf[u+1])			/* high byte */
837 			buf[idx++] = '?';  /* non-ASCII character */
838 		else
839 			buf[idx++] = tbuf[u];
840 	}
841 	buf[idx] = 0;
842 	err = idx;
843 	return err;
844 }
845 
846 
847 /********************************************************************
848  * USB device handling:
849  * the USB device are static allocated [USB_MAX_DEVICE].
850  */
851 
852 #ifndef CONFIG_DM_USB
853 
854 /* returns a pointer to the device with the index [index].
855  * if the device is not assigned (dev->devnum==-1) returns NULL
856  */
usb_get_dev_index(int index)857 struct usb_device *usb_get_dev_index(int index)
858 {
859 	if (usb_dev[index].devnum == -1)
860 		return NULL;
861 	else
862 		return &usb_dev[index];
863 }
864 
usb_alloc_new_device(struct udevice * controller,struct usb_device ** devp)865 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
866 {
867 	int i;
868 	debug("New Device %d\n", dev_index);
869 	if (dev_index == USB_MAX_DEVICE) {
870 		printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
871 		return -ENOSPC;
872 	}
873 	/* default Address is 0, real addresses start with 1 */
874 	usb_dev[dev_index].devnum = dev_index + 1;
875 	usb_dev[dev_index].maxchild = 0;
876 	for (i = 0; i < USB_MAXCHILDREN; i++)
877 		usb_dev[dev_index].children[i] = NULL;
878 	usb_dev[dev_index].parent = NULL;
879 	usb_dev[dev_index].controller = controller;
880 	dev_index++;
881 	*devp = &usb_dev[dev_index - 1];
882 
883 	return 0;
884 }
885 
886 /*
887  * Free the newly created device node.
888  * Called in error cases where configuring a newly attached
889  * device fails for some reason.
890  */
usb_free_device(struct udevice * controller)891 void usb_free_device(struct udevice *controller)
892 {
893 	dev_index--;
894 	debug("Freeing device node: %d\n", dev_index);
895 	memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
896 	usb_dev[dev_index].devnum = -1;
897 }
898 
899 /*
900  * XHCI issues Enable Slot command and thereafter
901  * allocates device contexts. Provide a weak alias
902  * function for the purpose, so that XHCI overrides it
903  * and EHCI/OHCI just work out of the box.
904  */
usb_alloc_device(struct usb_device * udev)905 __weak int usb_alloc_device(struct usb_device *udev)
906 {
907 	return 0;
908 }
909 #endif /* !CONFIG_DM_USB */
910 
usb_hub_port_reset(struct usb_device * dev,struct usb_device * hub)911 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
912 {
913 	if (!hub)
914 		usb_reset_root_port(dev);
915 
916 	return 0;
917 }
918 
get_descriptor_len(struct usb_device * dev,int len,int expect_len)919 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
920 {
921 	__maybe_unused struct usb_device_descriptor *desc;
922 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
923 	int err;
924 
925 	desc = (struct usb_device_descriptor *)tmpbuf;
926 
927 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
928 	if (err < expect_len) {
929 		if (err < 0) {
930 			printf("unable to get device descriptor (error=%d)\n",
931 				err);
932 			return err;
933 		} else {
934 			printf("USB device descriptor short read (expected %i, got %i)\n",
935 				expect_len, err);
936 			return -EIO;
937 		}
938 	}
939 	memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
940 
941 	return 0;
942 }
943 
usb_setup_descriptor(struct usb_device * dev,bool do_read)944 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
945 {
946 	/*
947 	 * This is a Windows scheme of initialization sequence, with double
948 	 * reset of the device (Linux uses the same sequence)
949 	 * Some equipment is said to work only with such init sequence; this
950 	 * patch is based on the work by Alan Stern:
951 	 * http://sourceforge.net/mailarchive/forum.php?
952 	 * thread_id=5729457&forum_id=5398
953 	 */
954 
955 	/*
956 	 * send 64-byte GET-DEVICE-DESCRIPTOR request.  Since the descriptor is
957 	 * only 18 bytes long, this will terminate with a short packet.  But if
958 	 * the maxpacket size is 8 or 16 the device may be waiting to transmit
959 	 * some more, or keeps on retransmitting the 8 byte header.
960 	 */
961 
962 	if (dev->speed == USB_SPEED_LOW) {
963 		dev->descriptor.bMaxPacketSize0 = 8;
964 		dev->maxpacketsize = PACKET_SIZE_8;
965 	} else {
966 		dev->descriptor.bMaxPacketSize0 = 64;
967 		dev->maxpacketsize = PACKET_SIZE_64;
968 	}
969 	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
970 	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
971 
972 	if (do_read && dev->speed == USB_SPEED_FULL) {
973 		int err;
974 
975 		/*
976 		 * Validate we've received only at least 8 bytes, not that
977 		 * we've received the entire descriptor. The reasoning is:
978 		 * - The code only uses fields in the first 8 bytes, so
979 		 *   that's all we need to have fetched at this stage.
980 		 * - The smallest maxpacket size is 8 bytes. Before we know
981 		 *   the actual maxpacket the device uses, the USB controller
982 		 *   may only accept a single packet. Consequently we are only
983 		 *   guaranteed to receive 1 packet (at least 8 bytes) even in
984 		 *   a non-error case.
985 		 *
986 		 * At least the DWC2 controller needs to be programmed with
987 		 * the number of packets in addition to the number of bytes.
988 		 * A request for 64 bytes of data with the maxpacket guessed
989 		 * as 64 (above) yields a request for 1 packet.
990 		 */
991 		err = get_descriptor_len(dev, 64, 8);
992 		if (err)
993 			return err;
994 	}
995 
996 	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
997 	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
998 	switch (dev->descriptor.bMaxPacketSize0) {
999 	case 8:
1000 		dev->maxpacketsize  = PACKET_SIZE_8;
1001 		break;
1002 	case 16:
1003 		dev->maxpacketsize = PACKET_SIZE_16;
1004 		break;
1005 	case 32:
1006 		dev->maxpacketsize = PACKET_SIZE_32;
1007 		break;
1008 	case 64:
1009 		dev->maxpacketsize = PACKET_SIZE_64;
1010 		break;
1011 	default:
1012 		printf("%s: invalid max packet size\n", __func__);
1013 		return -EIO;
1014 	}
1015 
1016 	return 0;
1017 }
1018 
usb_prepare_device(struct usb_device * dev,int addr,bool do_read,struct usb_device * parent)1019 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1020 			      struct usb_device *parent)
1021 {
1022 	int err;
1023 
1024 	/*
1025 	 * Allocate usb 3.0 device context.
1026 	 * USB 3.0 (xHCI) protocol tries to allocate device slot
1027 	 * and related data structures first. This call does that.
1028 	 * Refer to sec 4.3.2 in xHCI spec rev1.0
1029 	 */
1030 	err = usb_alloc_device(dev);
1031 	if (err) {
1032 		printf("Cannot allocate device context to get SLOT_ID\n");
1033 		return err;
1034 	}
1035 	err = usb_setup_descriptor(dev, do_read);
1036 	if (err)
1037 		return err;
1038 	err = usb_hub_port_reset(dev, parent);
1039 	if (err)
1040 		return err;
1041 
1042 	dev->devnum = addr;
1043 
1044 	err = usb_set_address(dev); /* set address */
1045 
1046 	if (err < 0) {
1047 		printf("\n      USB device not accepting new address " \
1048 			"(error=%lX)\n", dev->status);
1049 		return err;
1050 	}
1051 
1052 	mdelay(10);	/* Let the SET_ADDRESS settle */
1053 
1054 	/*
1055 	 * If we haven't read device descriptor before, read it here
1056 	 * after device is assigned an address. This is only applicable
1057 	 * to xHCI so far.
1058 	 */
1059 	if (!do_read) {
1060 		err = usb_setup_descriptor(dev, true);
1061 		if (err)
1062 			return err;
1063 	}
1064 
1065 	return 0;
1066 }
1067 
usb_select_config(struct usb_device * dev)1068 int usb_select_config(struct usb_device *dev)
1069 {
1070 	unsigned char *tmpbuf = NULL;
1071 	int err;
1072 
1073 	err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1074 	if (err)
1075 		return err;
1076 
1077 	/* correct le values */
1078 	le16_to_cpus(&dev->descriptor.bcdUSB);
1079 	le16_to_cpus(&dev->descriptor.idVendor);
1080 	le16_to_cpus(&dev->descriptor.idProduct);
1081 	le16_to_cpus(&dev->descriptor.bcdDevice);
1082 
1083 	/*
1084 	 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1085 	 * about this first Get Descriptor request. If there are any other
1086 	 * requests in the first microframe, the stick crashes. Wait about
1087 	 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1088 	 */
1089 	mdelay(1);
1090 
1091 	/* only support for one config for now */
1092 	err = usb_get_configuration_len(dev, 0);
1093 	if (err >= 0) {
1094 		tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1095 		if (!tmpbuf)
1096 			err = -ENOMEM;
1097 		else
1098 			err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1099 	}
1100 	if (err < 0) {
1101 		printf("usb_new_device: Cannot read configuration, " \
1102 		       "skipping device %04x:%04x\n",
1103 		       dev->descriptor.idVendor, dev->descriptor.idProduct);
1104 		free(tmpbuf);
1105 		return err;
1106 	}
1107 	usb_parse_config(dev, tmpbuf, 0);
1108 	free(tmpbuf);
1109 	usb_set_maxpacket(dev);
1110 	/*
1111 	 * we set the default configuration here
1112 	 * This seems premature. If the driver wants a different configuration
1113 	 * it will need to select itself.
1114 	 */
1115 	err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1116 	if (err < 0) {
1117 		printf("failed to set default configuration " \
1118 			"len %d, status %lX\n", dev->act_len, dev->status);
1119 		return err;
1120 	}
1121 
1122 	/*
1123 	 * Wait until the Set Configuration request gets processed by the
1124 	 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1125 	 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1126 	 */
1127 	mdelay(10);
1128 
1129 	debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1130 	      dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1131 	      dev->descriptor.iSerialNumber);
1132 	memset(dev->mf, 0, sizeof(dev->mf));
1133 	memset(dev->prod, 0, sizeof(dev->prod));
1134 	memset(dev->serial, 0, sizeof(dev->serial));
1135 	if (dev->descriptor.iManufacturer)
1136 		usb_string(dev, dev->descriptor.iManufacturer,
1137 			   dev->mf, sizeof(dev->mf));
1138 	if (dev->descriptor.iProduct)
1139 		usb_string(dev, dev->descriptor.iProduct,
1140 			   dev->prod, sizeof(dev->prod));
1141 	if (dev->descriptor.iSerialNumber)
1142 		usb_string(dev, dev->descriptor.iSerialNumber,
1143 			   dev->serial, sizeof(dev->serial));
1144 	debug("Manufacturer %s\n", dev->mf);
1145 	debug("Product      %s\n", dev->prod);
1146 	debug("SerialNumber %s\n", dev->serial);
1147 
1148 	return 0;
1149 }
1150 
usb_setup_device(struct usb_device * dev,bool do_read,struct usb_device * parent)1151 int usb_setup_device(struct usb_device *dev, bool do_read,
1152 		     struct usb_device *parent)
1153 {
1154 	int addr;
1155 	int ret;
1156 
1157 	/* We still haven't set the Address yet */
1158 	addr = dev->devnum;
1159 	dev->devnum = 0;
1160 
1161 	ret = usb_prepare_device(dev, addr, do_read, parent);
1162 	if (ret)
1163 		return ret;
1164 	ret = usb_select_config(dev);
1165 
1166 	return ret;
1167 }
1168 
1169 #ifndef CONFIG_DM_USB
1170 /*
1171  * By the time we get here, the device has gotten a new device ID
1172  * and is in the default state. We need to identify the thing and
1173  * get the ball rolling..
1174  *
1175  * Returns 0 for success, != 0 for error.
1176  */
usb_new_device(struct usb_device * dev)1177 int usb_new_device(struct usb_device *dev)
1178 {
1179 	bool do_read = true;
1180 	int err;
1181 
1182 	/*
1183 	 * XHCI needs to issue a Address device command to setup
1184 	 * proper device context structures, before it can interact
1185 	 * with the device. So a get_descriptor will fail before any
1186 	 * of that is done for XHCI unlike EHCI.
1187 	 */
1188 #ifdef CONFIG_USB_XHCI_HCD
1189 	do_read = false;
1190 #endif
1191 	err = usb_setup_device(dev, do_read, dev->parent);
1192 	if (err)
1193 		return err;
1194 
1195 	/* Now probe if the device is a hub */
1196 	err = usb_hub_probe(dev, 0);
1197 	if (err < 0)
1198 		return err;
1199 
1200 	return 0;
1201 }
1202 #endif
1203 
1204 __weak
board_usb_init(int index,enum usb_init_type init)1205 int board_usb_init(int index, enum usb_init_type init)
1206 {
1207 	return 0;
1208 }
1209 
1210 __weak
board_usb_cleanup(int index,enum usb_init_type init)1211 int board_usb_cleanup(int index, enum usb_init_type init)
1212 {
1213 	return 0;
1214 }
1215 
usb_device_has_child_on_port(struct usb_device * parent,int port)1216 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1217 {
1218 #ifdef CONFIG_DM_USB
1219 	return false;
1220 #else
1221 	return parent->children[port] != NULL;
1222 #endif
1223 }
1224 
1225 #ifdef CONFIG_DM_USB
usb_find_usb2_hub_address_port(struct usb_device * udev,uint8_t * hub_address,uint8_t * hub_port)1226 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1227 			       uint8_t *hub_address, uint8_t *hub_port)
1228 {
1229 	struct udevice *parent;
1230 	struct usb_device *uparent, *ttdev;
1231 
1232 	/*
1233 	 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1234 	 * to the parent udevice, not the actual udevice belonging to the
1235 	 * udev as the device is not instantiated yet. So when searching
1236 	 * for the first usb-2 parent start with udev->dev not
1237 	 * udev->dev->parent .
1238 	 */
1239 	ttdev = udev;
1240 	parent = udev->dev;
1241 	uparent = dev_get_parent_priv(parent);
1242 
1243 	while (uparent->speed != USB_SPEED_HIGH) {
1244 		struct udevice *dev = parent;
1245 
1246 		if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1247 			printf("Error: Cannot find high speed parent of usb-1 device\n");
1248 			*hub_address = 0;
1249 			*hub_port = 0;
1250 			return;
1251 		}
1252 
1253 		ttdev = dev_get_parent_priv(dev);
1254 		parent = dev->parent;
1255 		uparent = dev_get_parent_priv(parent);
1256 	}
1257 	*hub_address = uparent->devnum;
1258 	*hub_port = ttdev->portnr;
1259 }
1260 #else
usb_find_usb2_hub_address_port(struct usb_device * udev,uint8_t * hub_address,uint8_t * hub_port)1261 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1262 			       uint8_t *hub_address, uint8_t *hub_port)
1263 {
1264 	/* Find out the nearest parent which is high speed */
1265 	while (udev->parent->parent != NULL)
1266 		if (udev->parent->speed != USB_SPEED_HIGH) {
1267 			udev = udev->parent;
1268 		} else {
1269 			*hub_address = udev->parent->devnum;
1270 			*hub_port = udev->portnr;
1271 			return;
1272 		}
1273 
1274 	printf("Error: Cannot find high speed parent of usb-1 device\n");
1275 	*hub_address = 0;
1276 	*hub_port = 0;
1277 }
1278 #endif
1279 
1280 
1281 /* EOF */
1282