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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 #if !CONFIG_IS_ENABLED(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_IS_ENABLED(DM_USB) */
187 
188 
189 /*-------------------------------------------------------------------
190  * Message wrappers.
191  *
192  */
193 
194 /*
195  * submits an Interrupt Message. Some drivers may implement non-blocking
196  * polling: when non-block is true and the device is not responding return
197  * -EAGAIN instead of waiting for device to respond.
198  */
usb_int_msg(struct usb_device * dev,unsigned long pipe,void * buffer,int transfer_len,int interval,bool nonblock)199 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
200 		void *buffer, int transfer_len, int interval, bool nonblock)
201 {
202 	return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
203 			      nonblock);
204 }
205 
206 /*
207  * submits a control message and waits for comletion (at least timeout * 1ms)
208  * If timeout is 0, we don't wait for completion (used as example to set and
209  * clear keyboards LEDs). For data transfers, (storage transfers) we don't
210  * allow control messages with 0 timeout, by previousely resetting the flag
211  * asynch_allowed (usb_disable_asynch(1)).
212  * returns the transferred length if OK or -1 if error. The transferred length
213  * and the current status are stored in the dev->act_len and dev->status.
214  */
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)215 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
216 			unsigned char request, unsigned char requesttype,
217 			unsigned short value, unsigned short index,
218 			void *data, unsigned short size, int timeout)
219 {
220 	ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
221 	int err;
222 
223 	if ((timeout == 0) && (!asynch_allowed)) {
224 		/* request for a asynch control pipe is not allowed */
225 		return -EINVAL;
226 	}
227 
228 	/* set setup command */
229 	setup_packet->requesttype = requesttype;
230 	setup_packet->request = request;
231 	setup_packet->value = cpu_to_le16(value);
232 	setup_packet->index = cpu_to_le16(index);
233 	setup_packet->length = cpu_to_le16(size);
234 	debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
235 	      "value 0x%X index 0x%X length 0x%X\n",
236 	      request, requesttype, value, index, size);
237 	dev->status = USB_ST_NOT_PROC; /*not yet processed */
238 
239 	err = submit_control_msg(dev, pipe, data, size, setup_packet);
240 	if (err < 0)
241 		return err;
242 	if (timeout == 0)
243 		return (int)size;
244 
245 	/*
246 	 * Wait for status to update until timeout expires, USB driver
247 	 * interrupt handler may set the status when the USB operation has
248 	 * been completed.
249 	 */
250 	while (timeout--) {
251 		if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
252 			break;
253 		mdelay(1);
254 	}
255 	if (dev->status)
256 		return -1;
257 
258 	return dev->act_len;
259 
260 }
261 
262 /*-------------------------------------------------------------------
263  * submits bulk message, and waits for completion. returns 0 if Ok or
264  * negative if Error.
265  * synchronous behavior
266  */
usb_bulk_msg(struct usb_device * dev,unsigned int pipe,void * data,int len,int * actual_length,int timeout)267 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
268 			void *data, int len, int *actual_length, int timeout)
269 {
270 	if (len < 0)
271 		return -EINVAL;
272 	dev->status = USB_ST_NOT_PROC; /*not yet processed */
273 	if (submit_bulk_msg(dev, pipe, data, len) < 0)
274 		return -EIO;
275 	while (timeout--) {
276 		if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
277 			break;
278 		mdelay(1);
279 	}
280 	*actual_length = dev->act_len;
281 	if (dev->status == 0)
282 		return 0;
283 	else
284 		return -EIO;
285 }
286 
287 
288 /*-------------------------------------------------------------------
289  * Max Packet stuff
290  */
291 
292 /*
293  * returns the max packet size, depending on the pipe direction and
294  * the configurations values
295  */
usb_maxpacket(struct usb_device * dev,unsigned long pipe)296 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
297 {
298 	/* direction is out -> use emaxpacket out */
299 	if ((pipe & USB_DIR_IN) == 0)
300 		return dev->epmaxpacketout[((pipe>>15) & 0xf)];
301 	else
302 		return dev->epmaxpacketin[((pipe>>15) & 0xf)];
303 }
304 
305 /*
306  * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
307  * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
308  * when it is inlined in 1 single routine. What happens is that the register r3
309  * is used as loop-count 'i', but gets overwritten later on.
310  * This is clearly a compiler bug, but it is easier to workaround it here than
311  * to update the compiler (Occurs with at least several GCC 4.{1,2},x
312  * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
313  *
314  * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
315  */
316 static void noinline
usb_set_maxpacket_ep(struct usb_device * dev,int if_idx,int ep_idx)317 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
318 {
319 	int b;
320 	struct usb_endpoint_descriptor *ep;
321 	u16 ep_wMaxPacketSize;
322 
323 	ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
324 
325 	b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
326 	ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
327 
328 	if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
329 						USB_ENDPOINT_XFER_CONTROL) {
330 		/* Control => bidirectional */
331 		dev->epmaxpacketout[b] = ep_wMaxPacketSize;
332 		dev->epmaxpacketin[b] = ep_wMaxPacketSize;
333 		debug("##Control EP epmaxpacketout/in[%d] = %d\n",
334 		      b, dev->epmaxpacketin[b]);
335 	} else {
336 		if ((ep->bEndpointAddress & 0x80) == 0) {
337 			/* OUT Endpoint */
338 			if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
339 				dev->epmaxpacketout[b] = ep_wMaxPacketSize;
340 				debug("##EP epmaxpacketout[%d] = %d\n",
341 				      b, dev->epmaxpacketout[b]);
342 			}
343 		} else {
344 			/* IN Endpoint */
345 			if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
346 				dev->epmaxpacketin[b] = ep_wMaxPacketSize;
347 				debug("##EP epmaxpacketin[%d] = %d\n",
348 				      b, dev->epmaxpacketin[b]);
349 			}
350 		} /* if out */
351 	} /* if control */
352 }
353 
354 /*
355  * set the max packed value of all endpoints in the given configuration
356  */
usb_set_maxpacket(struct usb_device * dev)357 static int usb_set_maxpacket(struct usb_device *dev)
358 {
359 	int i, ii;
360 
361 	for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
362 		for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
363 			usb_set_maxpacket_ep(dev, i, ii);
364 
365 	return 0;
366 }
367 
368 /*******************************************************************************
369  * Parse the config, located in buffer, and fills the dev->config structure.
370  * Note that all little/big endian swapping are done automatically.
371  * (wTotalLength has already been swapped and sanitized when it was read.)
372  */
usb_parse_config(struct usb_device * dev,unsigned char * buffer,int cfgno)373 static int usb_parse_config(struct usb_device *dev,
374 			unsigned char *buffer, int cfgno)
375 {
376 	struct usb_descriptor_header *head;
377 	int index, ifno, epno, curr_if_num;
378 	u16 ep_wMaxPacketSize;
379 	struct usb_interface *if_desc = NULL;
380 
381 	ifno = -1;
382 	epno = -1;
383 	curr_if_num = -1;
384 
385 	dev->configno = cfgno;
386 	head = (struct usb_descriptor_header *) &buffer[0];
387 	if (head->bDescriptorType != USB_DT_CONFIG) {
388 		printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
389 			head->bDescriptorType);
390 		return -EINVAL;
391 	}
392 	if (head->bLength != USB_DT_CONFIG_SIZE) {
393 		printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
394 		return -EINVAL;
395 	}
396 	memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
397 	dev->config.no_of_if = 0;
398 
399 	index = dev->config.desc.bLength;
400 	/* Ok the first entry must be a configuration entry,
401 	 * now process the others */
402 	head = (struct usb_descriptor_header *) &buffer[index];
403 	while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
404 		switch (head->bDescriptorType) {
405 		case USB_DT_INTERFACE:
406 			if (head->bLength != USB_DT_INTERFACE_SIZE) {
407 				printf("ERROR: Invalid USB IF length (%d)\n",
408 					head->bLength);
409 				break;
410 			}
411 			if (index + USB_DT_INTERFACE_SIZE >
412 			    dev->config.desc.wTotalLength) {
413 				puts("USB IF descriptor overflowed buffer!\n");
414 				break;
415 			}
416 			if (((struct usb_interface_descriptor *) \
417 			     head)->bInterfaceNumber != curr_if_num) {
418 				/* this is a new interface, copy new desc */
419 				ifno = dev->config.no_of_if;
420 				if (ifno >= USB_MAXINTERFACES) {
421 					puts("Too many USB interfaces!\n");
422 					/* try to go on with what we have */
423 					return -EINVAL;
424 				}
425 				if_desc = &dev->config.if_desc[ifno];
426 				dev->config.no_of_if++;
427 				memcpy(if_desc, head,
428 					USB_DT_INTERFACE_SIZE);
429 				if_desc->no_of_ep = 0;
430 				if_desc->num_altsetting = 1;
431 				curr_if_num =
432 				     if_desc->desc.bInterfaceNumber;
433 			} else {
434 				/* found alternate setting for the interface */
435 				if (ifno >= 0) {
436 					if_desc = &dev->config.if_desc[ifno];
437 					if_desc->num_altsetting++;
438 				}
439 			}
440 			break;
441 		case USB_DT_ENDPOINT:
442 			if (head->bLength != USB_DT_ENDPOINT_SIZE &&
443 			    head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
444 				printf("ERROR: Invalid USB EP length (%d)\n",
445 					head->bLength);
446 				break;
447 			}
448 			if (index + head->bLength >
449 			    dev->config.desc.wTotalLength) {
450 				puts("USB EP descriptor overflowed buffer!\n");
451 				break;
452 			}
453 			if (ifno < 0) {
454 				puts("Endpoint descriptor out of order!\n");
455 				break;
456 			}
457 			epno = dev->config.if_desc[ifno].no_of_ep;
458 			if_desc = &dev->config.if_desc[ifno];
459 			if (epno >= USB_MAXENDPOINTS) {
460 				printf("Interface %d has too many endpoints!\n",
461 					if_desc->desc.bInterfaceNumber);
462 				return -EINVAL;
463 			}
464 			/* found an endpoint */
465 			if_desc->no_of_ep++;
466 			memcpy(&if_desc->ep_desc[epno], head,
467 				USB_DT_ENDPOINT_SIZE);
468 			ep_wMaxPacketSize = get_unaligned(&dev->config.\
469 							if_desc[ifno].\
470 							ep_desc[epno].\
471 							wMaxPacketSize);
472 			put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
473 					&dev->config.\
474 					if_desc[ifno].\
475 					ep_desc[epno].\
476 					wMaxPacketSize);
477 			debug("if %d, ep %d\n", ifno, epno);
478 			break;
479 		case USB_DT_SS_ENDPOINT_COMP:
480 			if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
481 				printf("ERROR: Invalid USB EPC length (%d)\n",
482 					head->bLength);
483 				break;
484 			}
485 			if (index + USB_DT_SS_EP_COMP_SIZE >
486 			    dev->config.desc.wTotalLength) {
487 				puts("USB EPC descriptor overflowed buffer!\n");
488 				break;
489 			}
490 			if (ifno < 0 || epno < 0) {
491 				puts("EPC descriptor out of order!\n");
492 				break;
493 			}
494 			if_desc = &dev->config.if_desc[ifno];
495 			memcpy(&if_desc->ss_ep_comp_desc[epno], head,
496 				USB_DT_SS_EP_COMP_SIZE);
497 			break;
498 		default:
499 			if (head->bLength == 0)
500 				return -EINVAL;
501 
502 			debug("unknown Description Type : %x\n",
503 			      head->bDescriptorType);
504 
505 #ifdef DEBUG
506 			{
507 				unsigned char *ch = (unsigned char *)head;
508 				int i;
509 
510 				for (i = 0; i < head->bLength; i++)
511 					debug("%02X ", *ch++);
512 				debug("\n\n\n");
513 			}
514 #endif
515 			break;
516 		}
517 		index += head->bLength;
518 		head = (struct usb_descriptor_header *)&buffer[index];
519 	}
520 	return 0;
521 }
522 
523 /***********************************************************************
524  * Clears an endpoint
525  * endp: endpoint number in bits 0-3;
526  * direction flag in bit 7 (1 = IN, 0 = OUT)
527  */
usb_clear_halt(struct usb_device * dev,int pipe)528 int usb_clear_halt(struct usb_device *dev, int pipe)
529 {
530 	int result;
531 	int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
532 
533 	result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
534 				 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
535 				 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
536 
537 	/* don't clear if failed */
538 	if (result < 0)
539 		return result;
540 
541 	/*
542 	 * NOTE: we do not get status and verify reset was successful
543 	 * as some devices are reported to lock up upon this check..
544 	 */
545 
546 	usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
547 
548 	/* toggle is reset on clear */
549 	usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
550 	return 0;
551 }
552 
553 
554 /**********************************************************************
555  * get_descriptor type
556  */
usb_get_descriptor(struct usb_device * dev,unsigned char type,unsigned char index,void * buf,int size)557 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
558 			unsigned char index, void *buf, int size)
559 {
560 	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
561 			       USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
562 			       (type << 8) + index, 0, buf, size,
563 			       USB_CNTL_TIMEOUT);
564 }
565 
566 /**********************************************************************
567  * gets len of configuration cfgno
568  */
usb_get_configuration_len(struct usb_device * dev,int cfgno)569 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
570 {
571 	int result;
572 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
573 	struct usb_config_descriptor *config;
574 
575 	config = (struct usb_config_descriptor *)&buffer[0];
576 	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
577 	if (result < 9) {
578 		if (result < 0)
579 			printf("unable to get descriptor, error %lX\n",
580 				dev->status);
581 		else
582 			printf("config descriptor too short " \
583 				"(expected %i, got %i)\n", 9, result);
584 		return -EIO;
585 	}
586 	return le16_to_cpu(config->wTotalLength);
587 }
588 
589 /**********************************************************************
590  * gets configuration cfgno and store it in the buffer
591  */
usb_get_configuration_no(struct usb_device * dev,int cfgno,unsigned char * buffer,int length)592 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
593 			     unsigned char *buffer, int length)
594 {
595 	int result;
596 	struct usb_config_descriptor *config;
597 
598 	config = (struct usb_config_descriptor *)&buffer[0];
599 	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
600 	debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
601 	      le16_to_cpu(config->wTotalLength));
602 	config->wTotalLength = result; /* validated, with CPU byte order */
603 
604 	return result;
605 }
606 
607 /********************************************************************
608  * set address of a device to the value in dev->devnum.
609  * This can only be done by addressing the device via the default address (0)
610  */
usb_set_address(struct usb_device * dev)611 static int usb_set_address(struct usb_device *dev)
612 {
613 	debug("set address %d\n", dev->devnum);
614 
615 	return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
616 			       0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
617 }
618 
619 /********************************************************************
620  * set interface number to interface
621  */
usb_set_interface(struct usb_device * dev,int interface,int alternate)622 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
623 {
624 	struct usb_interface *if_face = NULL;
625 	int ret, i;
626 
627 	for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
628 		if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
629 			if_face = &dev->config.if_desc[i];
630 			break;
631 		}
632 	}
633 	if (!if_face) {
634 		printf("selecting invalid interface %d", interface);
635 		return -EINVAL;
636 	}
637 	/*
638 	 * We should return now for devices with only one alternate setting.
639 	 * According to 9.4.10 of the Universal Serial Bus Specification
640 	 * Revision 2.0 such devices can return with a STALL. This results in
641 	 * some USB sticks timeouting during initialization and then being
642 	 * unusable in U-Boot.
643 	 */
644 	if (if_face->num_altsetting == 1)
645 		return 0;
646 
647 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
648 				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
649 				alternate, interface, NULL, 0,
650 				USB_CNTL_TIMEOUT * 5);
651 	if (ret < 0)
652 		return ret;
653 
654 	return 0;
655 }
656 
657 /********************************************************************
658  * set configuration number to configuration
659  */
usb_set_configuration(struct usb_device * dev,int configuration)660 static int usb_set_configuration(struct usb_device *dev, int configuration)
661 {
662 	int res;
663 	debug("set configuration %d\n", configuration);
664 	/* set setup command */
665 	res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
666 				USB_REQ_SET_CONFIGURATION, 0,
667 				configuration, 0,
668 				NULL, 0, USB_CNTL_TIMEOUT);
669 	if (res == 0) {
670 		dev->toggle[0] = 0;
671 		dev->toggle[1] = 0;
672 		return 0;
673 	} else
674 		return -EIO;
675 }
676 
677 /********************************************************************
678  * set protocol to protocol
679  */
usb_set_protocol(struct usb_device * dev,int ifnum,int protocol)680 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
681 {
682 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
683 		USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
684 		protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
685 }
686 
687 /********************************************************************
688  * set idle
689  */
usb_set_idle(struct usb_device * dev,int ifnum,int duration,int report_id)690 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
691 {
692 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
693 		USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
694 		(duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
695 }
696 
697 /********************************************************************
698  * get report
699  */
usb_get_report(struct usb_device * dev,int ifnum,unsigned char type,unsigned char id,void * buf,int size)700 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
701 		   unsigned char id, void *buf, int size)
702 {
703 	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
704 			USB_REQ_GET_REPORT,
705 			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
706 			(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
707 }
708 
709 /********************************************************************
710  * get class descriptor
711  */
usb_get_class_descriptor(struct usb_device * dev,int ifnum,unsigned char type,unsigned char id,void * buf,int size)712 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
713 		unsigned char type, unsigned char id, void *buf, int size)
714 {
715 	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
716 		USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
717 		(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
718 }
719 
720 /********************************************************************
721  * get string index in buffer
722  */
usb_get_string(struct usb_device * dev,unsigned short langid,unsigned char index,void * buf,int size)723 static int usb_get_string(struct usb_device *dev, unsigned short langid,
724 		   unsigned char index, void *buf, int size)
725 {
726 	int i;
727 	int result;
728 
729 	for (i = 0; i < 3; ++i) {
730 		/* some devices are flaky */
731 		result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
732 			USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
733 			(USB_DT_STRING << 8) + index, langid, buf, size,
734 			USB_CNTL_TIMEOUT);
735 
736 		if (result > 0)
737 			break;
738 	}
739 
740 	return result;
741 }
742 
743 
usb_try_string_workarounds(unsigned char * buf,int * length)744 static void usb_try_string_workarounds(unsigned char *buf, int *length)
745 {
746 	int newlength, oldlength = *length;
747 
748 	for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
749 		if (!isprint(buf[newlength]) || buf[newlength + 1])
750 			break;
751 
752 	if (newlength > 2) {
753 		buf[0] = newlength;
754 		*length = newlength;
755 	}
756 }
757 
758 
usb_string_sub(struct usb_device * dev,unsigned int langid,unsigned int index,unsigned char * buf)759 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
760 		unsigned int index, unsigned char *buf)
761 {
762 	int rc;
763 
764 	/* Try to read the string descriptor by asking for the maximum
765 	 * possible number of bytes */
766 	rc = usb_get_string(dev, langid, index, buf, 255);
767 
768 	/* If that failed try to read the descriptor length, then
769 	 * ask for just that many bytes */
770 	if (rc < 2) {
771 		rc = usb_get_string(dev, langid, index, buf, 2);
772 		if (rc == 2)
773 			rc = usb_get_string(dev, langid, index, buf, buf[0]);
774 	}
775 
776 	if (rc >= 2) {
777 		if (!buf[0] && !buf[1])
778 			usb_try_string_workarounds(buf, &rc);
779 
780 		/* There might be extra junk at the end of the descriptor */
781 		if (buf[0] < rc)
782 			rc = buf[0];
783 
784 		rc = rc - (rc & 1); /* force a multiple of two */
785 	}
786 
787 	if (rc < 2)
788 		rc = -EINVAL;
789 
790 	return rc;
791 }
792 
793 
794 /********************************************************************
795  * usb_string:
796  * Get string index and translate it to ascii.
797  * returns string length (> 0) or error (< 0)
798  */
usb_string(struct usb_device * dev,int index,char * buf,size_t size)799 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
800 {
801 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
802 	unsigned char *tbuf;
803 	int err;
804 	unsigned int u, idx;
805 
806 	if (size <= 0 || !buf || !index)
807 		return -EINVAL;
808 	buf[0] = 0;
809 	tbuf = &mybuf[0];
810 
811 	/* get langid for strings if it's not yet known */
812 	if (!dev->have_langid) {
813 		err = usb_string_sub(dev, 0, 0, tbuf);
814 		if (err < 0) {
815 			debug("error getting string descriptor 0 " \
816 			      "(error=%lx)\n", dev->status);
817 			return -EIO;
818 		} else if (tbuf[0] < 4) {
819 			debug("string descriptor 0 too short\n");
820 			return -EIO;
821 		} else {
822 			dev->have_langid = -1;
823 			dev->string_langid = tbuf[2] | (tbuf[3] << 8);
824 				/* always use the first langid listed */
825 			debug("USB device number %d default " \
826 			      "language ID 0x%x\n",
827 			      dev->devnum, dev->string_langid);
828 		}
829 	}
830 
831 	err = usb_string_sub(dev, dev->string_langid, index, tbuf);
832 	if (err < 0)
833 		return err;
834 
835 	size--;		/* leave room for trailing NULL char in output buffer */
836 	for (idx = 0, u = 2; u < err; u += 2) {
837 		if (idx >= size)
838 			break;
839 		if (tbuf[u+1])			/* high byte */
840 			buf[idx++] = '?';  /* non-ASCII character */
841 		else
842 			buf[idx++] = tbuf[u];
843 	}
844 	buf[idx] = 0;
845 	err = idx;
846 	return err;
847 }
848 
849 
850 /********************************************************************
851  * USB device handling:
852  * the USB device are static allocated [USB_MAX_DEVICE].
853  */
854 
855 #if !CONFIG_IS_ENABLED(DM_USB)
856 
857 /* returns a pointer to the device with the index [index].
858  * if the device is not assigned (dev->devnum==-1) returns NULL
859  */
usb_get_dev_index(int index)860 struct usb_device *usb_get_dev_index(int index)
861 {
862 	if (usb_dev[index].devnum == -1)
863 		return NULL;
864 	else
865 		return &usb_dev[index];
866 }
867 
usb_alloc_new_device(struct udevice * controller,struct usb_device ** devp)868 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
869 {
870 	int i;
871 	debug("New Device %d\n", dev_index);
872 	if (dev_index == USB_MAX_DEVICE) {
873 		printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
874 		return -ENOSPC;
875 	}
876 	/* default Address is 0, real addresses start with 1 */
877 	usb_dev[dev_index].devnum = dev_index + 1;
878 	usb_dev[dev_index].maxchild = 0;
879 	for (i = 0; i < USB_MAXCHILDREN; i++)
880 		usb_dev[dev_index].children[i] = NULL;
881 	usb_dev[dev_index].parent = NULL;
882 	usb_dev[dev_index].controller = controller;
883 	dev_index++;
884 	*devp = &usb_dev[dev_index - 1];
885 
886 	return 0;
887 }
888 
889 /*
890  * Free the newly created device node.
891  * Called in error cases where configuring a newly attached
892  * device fails for some reason.
893  */
usb_free_device(struct udevice * controller)894 void usb_free_device(struct udevice *controller)
895 {
896 	dev_index--;
897 	debug("Freeing device node: %d\n", dev_index);
898 	memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
899 	usb_dev[dev_index].devnum = -1;
900 }
901 
902 /*
903  * XHCI issues Enable Slot command and thereafter
904  * allocates device contexts. Provide a weak alias
905  * function for the purpose, so that XHCI overrides it
906  * and EHCI/OHCI just work out of the box.
907  */
usb_alloc_device(struct usb_device * udev)908 __weak int usb_alloc_device(struct usb_device *udev)
909 {
910 	return 0;
911 }
912 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
913 
usb_hub_port_reset(struct usb_device * dev,struct usb_device * hub)914 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
915 {
916 	if (!hub)
917 		usb_reset_root_port(dev);
918 
919 	return 0;
920 }
921 
get_descriptor_len(struct usb_device * dev,int len,int expect_len)922 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
923 {
924 	__maybe_unused struct usb_device_descriptor *desc;
925 	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
926 	int err;
927 
928 	desc = (struct usb_device_descriptor *)tmpbuf;
929 
930 	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
931 	if (err < expect_len) {
932 		if (err < 0) {
933 			printf("unable to get device descriptor (error=%d)\n",
934 				err);
935 			return err;
936 		} else {
937 			printf("USB device descriptor short read (expected %i, got %i)\n",
938 				expect_len, err);
939 			return -EIO;
940 		}
941 	}
942 	memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
943 
944 	return 0;
945 }
946 
usb_setup_descriptor(struct usb_device * dev,bool do_read)947 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
948 {
949 	/*
950 	 * This is a Windows scheme of initialization sequence, with double
951 	 * reset of the device (Linux uses the same sequence)
952 	 * Some equipment is said to work only with such init sequence; this
953 	 * patch is based on the work by Alan Stern:
954 	 * http://sourceforge.net/mailarchive/forum.php?
955 	 * thread_id=5729457&forum_id=5398
956 	 */
957 
958 	/*
959 	 * send 64-byte GET-DEVICE-DESCRIPTOR request.  Since the descriptor is
960 	 * only 18 bytes long, this will terminate with a short packet.  But if
961 	 * the maxpacket size is 8 or 16 the device may be waiting to transmit
962 	 * some more, or keeps on retransmitting the 8 byte header.
963 	 */
964 
965 	if (dev->speed == USB_SPEED_LOW) {
966 		dev->descriptor.bMaxPacketSize0 = 8;
967 		dev->maxpacketsize = PACKET_SIZE_8;
968 	} else {
969 		dev->descriptor.bMaxPacketSize0 = 64;
970 		dev->maxpacketsize = PACKET_SIZE_64;
971 	}
972 	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
973 	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
974 
975 	if (do_read && dev->speed == USB_SPEED_FULL) {
976 		int err;
977 
978 		/*
979 		 * Validate we've received only at least 8 bytes, not that
980 		 * we've received the entire descriptor. The reasoning is:
981 		 * - The code only uses fields in the first 8 bytes, so
982 		 *   that's all we need to have fetched at this stage.
983 		 * - The smallest maxpacket size is 8 bytes. Before we know
984 		 *   the actual maxpacket the device uses, the USB controller
985 		 *   may only accept a single packet. Consequently we are only
986 		 *   guaranteed to receive 1 packet (at least 8 bytes) even in
987 		 *   a non-error case.
988 		 *
989 		 * At least the DWC2 controller needs to be programmed with
990 		 * the number of packets in addition to the number of bytes.
991 		 * A request for 64 bytes of data with the maxpacket guessed
992 		 * as 64 (above) yields a request for 1 packet.
993 		 */
994 		err = get_descriptor_len(dev, 64, 8);
995 		if (err)
996 			return err;
997 	}
998 
999 	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
1000 	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
1001 	switch (dev->descriptor.bMaxPacketSize0) {
1002 	case 8:
1003 		dev->maxpacketsize  = PACKET_SIZE_8;
1004 		break;
1005 	case 16:
1006 		dev->maxpacketsize = PACKET_SIZE_16;
1007 		break;
1008 	case 32:
1009 		dev->maxpacketsize = PACKET_SIZE_32;
1010 		break;
1011 	case 64:
1012 		dev->maxpacketsize = PACKET_SIZE_64;
1013 		break;
1014 	default:
1015 		printf("%s: invalid max packet size\n", __func__);
1016 		return -EIO;
1017 	}
1018 
1019 	return 0;
1020 }
1021 
usb_prepare_device(struct usb_device * dev,int addr,bool do_read,struct usb_device * parent)1022 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1023 			      struct usb_device *parent)
1024 {
1025 	int err;
1026 
1027 	/*
1028 	 * Allocate usb 3.0 device context.
1029 	 * USB 3.0 (xHCI) protocol tries to allocate device slot
1030 	 * and related data structures first. This call does that.
1031 	 * Refer to sec 4.3.2 in xHCI spec rev1.0
1032 	 */
1033 	err = usb_alloc_device(dev);
1034 	if (err) {
1035 		printf("Cannot allocate device context to get SLOT_ID\n");
1036 		return err;
1037 	}
1038 	err = usb_setup_descriptor(dev, do_read);
1039 	if (err)
1040 		return err;
1041 	err = usb_hub_port_reset(dev, parent);
1042 	if (err)
1043 		return err;
1044 
1045 	dev->devnum = addr;
1046 
1047 	err = usb_set_address(dev); /* set address */
1048 
1049 	if (err < 0) {
1050 		printf("\n      USB device not accepting new address " \
1051 			"(error=%lX)\n", dev->status);
1052 		return err;
1053 	}
1054 
1055 	mdelay(10);	/* Let the SET_ADDRESS settle */
1056 
1057 	/*
1058 	 * If we haven't read device descriptor before, read it here
1059 	 * after device is assigned an address. This is only applicable
1060 	 * to xHCI so far.
1061 	 */
1062 	if (!do_read) {
1063 		err = usb_setup_descriptor(dev, true);
1064 		if (err)
1065 			return err;
1066 	}
1067 
1068 	return 0;
1069 }
1070 
usb_select_config(struct usb_device * dev)1071 int usb_select_config(struct usb_device *dev)
1072 {
1073 	unsigned char *tmpbuf = NULL;
1074 	int err;
1075 
1076 	err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1077 	if (err)
1078 		return err;
1079 
1080 	/* correct le values */
1081 	le16_to_cpus(&dev->descriptor.bcdUSB);
1082 	le16_to_cpus(&dev->descriptor.idVendor);
1083 	le16_to_cpus(&dev->descriptor.idProduct);
1084 	le16_to_cpus(&dev->descriptor.bcdDevice);
1085 
1086 	/*
1087 	 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1088 	 * about this first Get Descriptor request. If there are any other
1089 	 * requests in the first microframe, the stick crashes. Wait about
1090 	 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1091 	 */
1092 	mdelay(1);
1093 
1094 	/* only support for one config for now */
1095 	err = usb_get_configuration_len(dev, 0);
1096 	if (err >= 0) {
1097 		tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1098 		if (!tmpbuf)
1099 			err = -ENOMEM;
1100 		else
1101 			err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1102 	}
1103 	if (err < 0) {
1104 		printf("usb_new_device: Cannot read configuration, " \
1105 		       "skipping device %04x:%04x\n",
1106 		       dev->descriptor.idVendor, dev->descriptor.idProduct);
1107 		free(tmpbuf);
1108 		return err;
1109 	}
1110 	usb_parse_config(dev, tmpbuf, 0);
1111 	free(tmpbuf);
1112 	usb_set_maxpacket(dev);
1113 	/*
1114 	 * we set the default configuration here
1115 	 * This seems premature. If the driver wants a different configuration
1116 	 * it will need to select itself.
1117 	 */
1118 	err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1119 	if (err < 0) {
1120 		printf("failed to set default configuration " \
1121 			"len %d, status %lX\n", dev->act_len, dev->status);
1122 		return err;
1123 	}
1124 
1125 	/*
1126 	 * Wait until the Set Configuration request gets processed by the
1127 	 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1128 	 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1129 	 */
1130 	mdelay(10);
1131 
1132 	debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1133 	      dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1134 	      dev->descriptor.iSerialNumber);
1135 	memset(dev->mf, 0, sizeof(dev->mf));
1136 	memset(dev->prod, 0, sizeof(dev->prod));
1137 	memset(dev->serial, 0, sizeof(dev->serial));
1138 	if (dev->descriptor.iManufacturer)
1139 		usb_string(dev, dev->descriptor.iManufacturer,
1140 			   dev->mf, sizeof(dev->mf));
1141 	if (dev->descriptor.iProduct)
1142 		usb_string(dev, dev->descriptor.iProduct,
1143 			   dev->prod, sizeof(dev->prod));
1144 	if (dev->descriptor.iSerialNumber)
1145 		usb_string(dev, dev->descriptor.iSerialNumber,
1146 			   dev->serial, sizeof(dev->serial));
1147 	debug("Manufacturer %s\n", dev->mf);
1148 	debug("Product      %s\n", dev->prod);
1149 	debug("SerialNumber %s\n", dev->serial);
1150 
1151 	return 0;
1152 }
1153 
usb_setup_device(struct usb_device * dev,bool do_read,struct usb_device * parent)1154 int usb_setup_device(struct usb_device *dev, bool do_read,
1155 		     struct usb_device *parent)
1156 {
1157 	int addr;
1158 	int ret;
1159 
1160 	/* We still haven't set the Address yet */
1161 	addr = dev->devnum;
1162 	dev->devnum = 0;
1163 
1164 	ret = usb_prepare_device(dev, addr, do_read, parent);
1165 	if (ret)
1166 		return ret;
1167 	ret = usb_select_config(dev);
1168 
1169 	return ret;
1170 }
1171 
1172 #if !CONFIG_IS_ENABLED(DM_USB)
1173 /*
1174  * By the time we get here, the device has gotten a new device ID
1175  * and is in the default state. We need to identify the thing and
1176  * get the ball rolling..
1177  *
1178  * Returns 0 for success, != 0 for error.
1179  */
usb_new_device(struct usb_device * dev)1180 int usb_new_device(struct usb_device *dev)
1181 {
1182 	bool do_read = true;
1183 	int err;
1184 
1185 	/*
1186 	 * XHCI needs to issue a Address device command to setup
1187 	 * proper device context structures, before it can interact
1188 	 * with the device. So a get_descriptor will fail before any
1189 	 * of that is done for XHCI unlike EHCI.
1190 	 */
1191 #ifdef CONFIG_USB_XHCI_HCD
1192 	do_read = false;
1193 #endif
1194 	err = usb_setup_device(dev, do_read, dev->parent);
1195 	if (err)
1196 		return err;
1197 
1198 	/* Now probe if the device is a hub */
1199 	err = usb_hub_probe(dev, 0);
1200 	if (err < 0)
1201 		return err;
1202 
1203 	return 0;
1204 }
1205 #endif
1206 
1207 __weak
board_usb_init(int index,enum usb_init_type init)1208 int board_usb_init(int index, enum usb_init_type init)
1209 {
1210 	return 0;
1211 }
1212 
1213 __weak
board_usb_cleanup(int index,enum usb_init_type init)1214 int board_usb_cleanup(int index, enum usb_init_type init)
1215 {
1216 	return 0;
1217 }
1218 
usb_device_has_child_on_port(struct usb_device * parent,int port)1219 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1220 {
1221 #if CONFIG_IS_ENABLED(DM_USB)
1222 	return false;
1223 #else
1224 	return parent->children[port] != NULL;
1225 #endif
1226 }
1227 
1228 #if CONFIG_IS_ENABLED(DM_USB)
usb_find_usb2_hub_address_port(struct usb_device * udev,uint8_t * hub_address,uint8_t * hub_port)1229 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1230 			       uint8_t *hub_address, uint8_t *hub_port)
1231 {
1232 	struct udevice *parent;
1233 	struct usb_device *uparent, *ttdev;
1234 
1235 	/*
1236 	 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1237 	 * to the parent udevice, not the actual udevice belonging to the
1238 	 * udev as the device is not instantiated yet. So when searching
1239 	 * for the first usb-2 parent start with udev->dev not
1240 	 * udev->dev->parent .
1241 	 */
1242 	ttdev = udev;
1243 	parent = udev->dev;
1244 	uparent = dev_get_parent_priv(parent);
1245 
1246 	while (uparent->speed != USB_SPEED_HIGH) {
1247 		struct udevice *dev = parent;
1248 
1249 		if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1250 			printf("Error: Cannot find high speed parent of usb-1 device\n");
1251 			*hub_address = 0;
1252 			*hub_port = 0;
1253 			return;
1254 		}
1255 
1256 		ttdev = dev_get_parent_priv(dev);
1257 		parent = dev->parent;
1258 		uparent = dev_get_parent_priv(parent);
1259 	}
1260 	*hub_address = uparent->devnum;
1261 	*hub_port = ttdev->portnr;
1262 }
1263 #else
usb_find_usb2_hub_address_port(struct usb_device * udev,uint8_t * hub_address,uint8_t * hub_port)1264 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1265 			       uint8_t *hub_address, uint8_t *hub_port)
1266 {
1267 	/* Find out the nearest parent which is high speed */
1268 	while (udev->parent->parent != NULL)
1269 		if (udev->parent->speed != USB_SPEED_HIGH) {
1270 			udev = udev->parent;
1271 		} else {
1272 			*hub_address = udev->parent->devnum;
1273 			*hub_port = udev->portnr;
1274 			return;
1275 		}
1276 
1277 	printf("Error: Cannot find high speed parent of usb-1 device\n");
1278 	*hub_address = 0;
1279 	*hub_port = 0;
1280 }
1281 #endif
1282 
1283 
1284 /* EOF */
1285