1 // SPDX-License-Identifier: GPL-2.0+
3 * Most of this source has been derived from the Linux USB
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)
16 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
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
26 * For each transfer (except "Interrupt") we wait for completion.
34 #include <asm/processor.h>
35 #include <linux/compiler.h>
36 #include <linux/ctype.h>
37 #include <asm/byteorder.h>
38 #include <asm/unaligned.h>
41 #include <linux/delay.h>
43 #define USB_BUFSIZ 512
45 static int asynch_allowed;
46 char usb_started; /* flag for the started/stopped USB status */
48 #if !CONFIG_IS_ENABLED(DM_USB)
49 static struct usb_device usb_dev[USB_MAX_DEVICE];
52 /***************************************************************************
58 struct usb_device *dev;
59 int i, start_index = 0;
60 int controllers_initialized = 0;
67 /* first make all devices unknown */
68 for (i = 0; i < USB_MAX_DEVICE; i++) {
69 memset(&usb_dev[i], 0, sizeof(struct usb_device));
70 usb_dev[i].devnum = -1;
73 /* init low_level USB */
74 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
75 /* init low_level USB */
77 ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl);
78 if (ret == -ENODEV) { /* No such device. */
79 puts("Port not available.\n");
80 controllers_initialized++;
84 if (ret) { /* Other error. */
85 puts("lowlevel init failed\n");
89 * lowlevel init is OK, now scan the bus for devices
90 * i.e. search HUBs and configure them
92 controllers_initialized++;
93 start_index = dev_index;
94 printf("scanning bus %d for devices... ", i);
95 ret = usb_alloc_new_device(ctrl, &dev);
100 * device 0 is always present
101 * (root hub, so let it analyze)
103 ret = usb_new_device(dev);
105 usb_free_device(dev->controller);
107 if (start_index == dev_index) {
108 puts("No USB Device found\n");
111 printf("%d USB Device(s) found\n",
112 dev_index - start_index);
119 /* if we were not able to find at least one working bus, bail out */
120 if (controllers_initialized == 0)
121 puts("USB error: all controllers failed lowlevel init\n");
123 return usb_started ? 0 : -ENODEV;
126 /******************************************************************************
127 * Stop USB this stops the LowLevel Part and deregisters USB devices.
138 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
139 if (usb_lowlevel_stop(i))
140 printf("failed to stop USB controller %d\n", i);
147 /******************************************************************************
148 * Detect if a USB device has been plugged or unplugged.
150 int usb_detect_change(void)
155 for (j = 0; j < USB_MAX_DEVICE; j++) {
156 for (i = 0; i < usb_dev[j].maxchild; i++) {
157 struct usb_port_status status;
159 if (usb_get_port_status(&usb_dev[j], i + 1,
161 /* USB request failed */
164 if (le16_to_cpu(status.wPortChange) &
165 USB_PORT_STAT_C_CONNECTION)
173 /* Lock or unlock async schedule on the controller */
174 __weak int usb_lock_async(struct usb_device *dev, int lock)
180 * disables the asynch behaviour of the control message. This is used for data
181 * transfers that uses the exclusiv access to the control and bulk messages.
182 * Returns the old value so it can be restored later.
184 int usb_disable_asynch(int disable)
186 int old_value = asynch_allowed;
188 asynch_allowed = !disable;
191 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
194 /*-------------------------------------------------------------------
200 * submits an Interrupt Message. Some drivers may implement non-blocking
201 * polling: when non-block is true and the device is not responding return
202 * -EAGAIN instead of waiting for device to respond.
204 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
205 void *buffer, int transfer_len, int interval, bool nonblock)
207 return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
212 * submits a control message and waits for comletion (at least timeout * 1ms)
213 * If timeout is 0, we don't wait for completion (used as example to set and
214 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
215 * allow control messages with 0 timeout, by previousely resetting the flag
216 * asynch_allowed (usb_disable_asynch(1)).
217 * returns the transferred length if OK or -1 if error. The transferred length
218 * and the current status are stored in the dev->act_len and dev->status.
220 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
221 unsigned char request, unsigned char requesttype,
222 unsigned short value, unsigned short index,
223 void *data, unsigned short size, int timeout)
225 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
228 if ((timeout == 0) && (!asynch_allowed)) {
229 /* request for a asynch control pipe is not allowed */
233 /* set setup command */
234 setup_packet->requesttype = requesttype;
235 setup_packet->request = request;
236 setup_packet->value = cpu_to_le16(value);
237 setup_packet->index = cpu_to_le16(index);
238 setup_packet->length = cpu_to_le16(size);
239 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
240 "value 0x%X index 0x%X length 0x%X\n",
241 request, requesttype, value, index, size);
242 dev->status = USB_ST_NOT_PROC; /*not yet processed */
244 err = submit_control_msg(dev, pipe, data, size, setup_packet);
251 * Wait for status to update until timeout expires, USB driver
252 * interrupt handler may set the status when the USB operation has
256 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
267 /*-------------------------------------------------------------------
268 * submits bulk message, and waits for completion. returns 0 if Ok or
270 * synchronous behavior
272 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
273 void *data, int len, int *actual_length, int timeout)
277 dev->status = USB_ST_NOT_PROC; /*not yet processed */
278 if (submit_bulk_msg(dev, pipe, data, len) < 0)
281 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
285 *actual_length = dev->act_len;
286 if (dev->status == 0)
293 /*-------------------------------------------------------------------
298 * returns the max packet size, depending on the pipe direction and
299 * the configurations values
301 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
303 /* direction is out -> use emaxpacket out */
304 if ((pipe & USB_DIR_IN) == 0)
305 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
307 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
311 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
312 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
313 * when it is inlined in 1 single routine. What happens is that the register r3
314 * is used as loop-count 'i', but gets overwritten later on.
315 * This is clearly a compiler bug, but it is easier to workaround it here than
316 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
317 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
319 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
322 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
325 struct usb_endpoint_descriptor *ep;
326 u16 ep_wMaxPacketSize;
328 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
330 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
331 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
333 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
334 USB_ENDPOINT_XFER_CONTROL) {
335 /* Control => bidirectional */
336 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
337 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
338 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
339 b, dev->epmaxpacketin[b]);
341 if ((ep->bEndpointAddress & 0x80) == 0) {
343 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
344 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
345 debug("##EP epmaxpacketout[%d] = %d\n",
346 b, dev->epmaxpacketout[b]);
350 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
351 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
352 debug("##EP epmaxpacketin[%d] = %d\n",
353 b, dev->epmaxpacketin[b]);
360 * set the max packed value of all endpoints in the given configuration
362 static int usb_set_maxpacket(struct usb_device *dev)
366 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
367 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
368 usb_set_maxpacket_ep(dev, i, ii);
373 /*******************************************************************************
374 * Parse the config, located in buffer, and fills the dev->config structure.
375 * Note that all little/big endian swapping are done automatically.
376 * (wTotalLength has already been swapped and sanitized when it was read.)
378 static int usb_parse_config(struct usb_device *dev,
379 unsigned char *buffer, int cfgno)
381 struct usb_descriptor_header *head;
382 int index, ifno, epno, curr_if_num;
383 u16 ep_wMaxPacketSize;
384 struct usb_interface *if_desc = NULL;
390 dev->configno = cfgno;
391 head = (struct usb_descriptor_header *) &buffer[0];
392 if (head->bDescriptorType != USB_DT_CONFIG) {
393 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
394 head->bDescriptorType);
397 if (head->bLength != USB_DT_CONFIG_SIZE) {
398 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
401 memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
402 dev->config.no_of_if = 0;
404 index = dev->config.desc.bLength;
405 /* Ok the first entry must be a configuration entry,
406 * now process the others */
407 head = (struct usb_descriptor_header *) &buffer[index];
408 while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
409 switch (head->bDescriptorType) {
410 case USB_DT_INTERFACE:
411 if (head->bLength != USB_DT_INTERFACE_SIZE) {
412 printf("ERROR: Invalid USB IF length (%d)\n",
416 if (index + USB_DT_INTERFACE_SIZE >
417 dev->config.desc.wTotalLength) {
418 puts("USB IF descriptor overflowed buffer!\n");
421 if (((struct usb_interface_descriptor *) \
422 head)->bInterfaceNumber != curr_if_num) {
423 /* this is a new interface, copy new desc */
424 ifno = dev->config.no_of_if;
425 if (ifno >= USB_MAXINTERFACES) {
426 puts("Too many USB interfaces!\n");
427 /* try to go on with what we have */
430 if_desc = &dev->config.if_desc[ifno];
431 dev->config.no_of_if++;
432 memcpy(if_desc, head,
433 USB_DT_INTERFACE_SIZE);
434 if_desc->no_of_ep = 0;
435 if_desc->num_altsetting = 1;
437 if_desc->desc.bInterfaceNumber;
439 /* found alternate setting for the interface */
441 if_desc = &dev->config.if_desc[ifno];
442 if_desc->num_altsetting++;
446 case USB_DT_ENDPOINT:
447 if (head->bLength != USB_DT_ENDPOINT_SIZE &&
448 head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
449 printf("ERROR: Invalid USB EP length (%d)\n",
453 if (index + head->bLength >
454 dev->config.desc.wTotalLength) {
455 puts("USB EP descriptor overflowed buffer!\n");
459 puts("Endpoint descriptor out of order!\n");
462 epno = dev->config.if_desc[ifno].no_of_ep;
463 if_desc = &dev->config.if_desc[ifno];
464 if (epno >= USB_MAXENDPOINTS) {
465 printf("Interface %d has too many endpoints!\n",
466 if_desc->desc.bInterfaceNumber);
469 /* found an endpoint */
471 memcpy(&if_desc->ep_desc[epno], head,
472 USB_DT_ENDPOINT_SIZE);
473 ep_wMaxPacketSize = get_unaligned(&dev->config.\
477 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
482 debug("if %d, ep %d\n", ifno, epno);
484 case USB_DT_SS_ENDPOINT_COMP:
485 if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
486 printf("ERROR: Invalid USB EPC length (%d)\n",
490 if (index + USB_DT_SS_EP_COMP_SIZE >
491 dev->config.desc.wTotalLength) {
492 puts("USB EPC descriptor overflowed buffer!\n");
495 if (ifno < 0 || epno < 0) {
496 puts("EPC descriptor out of order!\n");
499 if_desc = &dev->config.if_desc[ifno];
500 memcpy(&if_desc->ss_ep_comp_desc[epno], head,
501 USB_DT_SS_EP_COMP_SIZE);
504 if (head->bLength == 0)
507 debug("unknown Description Type : %x\n",
508 head->bDescriptorType);
512 unsigned char *ch = (unsigned char *)head;
515 for (i = 0; i < head->bLength; i++)
516 debug("%02X ", *ch++);
522 index += head->bLength;
523 head = (struct usb_descriptor_header *)&buffer[index];
528 /***********************************************************************
530 * endp: endpoint number in bits 0-3;
531 * direction flag in bit 7 (1 = IN, 0 = OUT)
533 int usb_clear_halt(struct usb_device *dev, int pipe)
536 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
538 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
539 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
540 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
542 /* don't clear if failed */
547 * NOTE: we do not get status and verify reset was successful
548 * as some devices are reported to lock up upon this check..
551 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
553 /* toggle is reset on clear */
554 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
559 /**********************************************************************
560 * get_descriptor type
562 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
563 unsigned char index, void *buf, int size)
565 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
566 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
567 (type << 8) + index, 0, buf, size,
571 /**********************************************************************
572 * gets len of configuration cfgno
574 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
577 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
578 struct usb_config_descriptor *config;
580 config = (struct usb_config_descriptor *)&buffer[0];
581 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
584 printf("unable to get descriptor, error %lX\n",
587 printf("config descriptor too short " \
588 "(expected %i, got %i)\n", 9, result);
591 return le16_to_cpu(config->wTotalLength);
594 /**********************************************************************
595 * gets configuration cfgno and store it in the buffer
597 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
598 unsigned char *buffer, int length)
601 struct usb_config_descriptor *config;
603 config = (struct usb_config_descriptor *)&buffer[0];
604 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
605 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
606 le16_to_cpu(config->wTotalLength));
607 config->wTotalLength = result; /* validated, with CPU byte order */
612 /********************************************************************
613 * set address of a device to the value in dev->devnum.
614 * This can only be done by addressing the device via the default address (0)
616 static int usb_set_address(struct usb_device *dev)
618 debug("set address %d\n", dev->devnum);
620 return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
621 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
624 /********************************************************************
625 * set interface number to interface
627 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
629 struct usb_interface *if_face = NULL;
632 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
633 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
634 if_face = &dev->config.if_desc[i];
639 printf("selecting invalid interface %d", interface);
643 * We should return now for devices with only one alternate setting.
644 * According to 9.4.10 of the Universal Serial Bus Specification
645 * Revision 2.0 such devices can return with a STALL. This results in
646 * some USB sticks timeouting during initialization and then being
647 * unusable in U-Boot.
649 if (if_face->num_altsetting == 1)
652 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
653 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
654 alternate, interface, NULL, 0,
655 USB_CNTL_TIMEOUT * 5);
662 /********************************************************************
663 * set configuration number to configuration
665 static int usb_set_configuration(struct usb_device *dev, int configuration)
668 debug("set configuration %d\n", configuration);
669 /* set setup command */
670 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
671 USB_REQ_SET_CONFIGURATION, 0,
673 NULL, 0, USB_CNTL_TIMEOUT);
682 /********************************************************************
683 * set protocol to protocol
685 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
687 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
688 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
689 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
692 /********************************************************************
695 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
697 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
698 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
699 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
702 /********************************************************************
705 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
706 unsigned char id, void *buf, int size)
708 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
710 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
711 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
714 /********************************************************************
715 * get class descriptor
717 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
718 unsigned char type, unsigned char id, void *buf, int size)
720 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
721 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
722 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
725 /********************************************************************
726 * get string index in buffer
728 static int usb_get_string(struct usb_device *dev, unsigned short langid,
729 unsigned char index, void *buf, int size)
734 for (i = 0; i < 3; ++i) {
735 /* some devices are flaky */
736 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
737 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
738 (USB_DT_STRING << 8) + index, langid, buf, size,
749 static void usb_try_string_workarounds(unsigned char *buf, int *length)
751 int newlength, oldlength = *length;
753 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
754 if (!isprint(buf[newlength]) || buf[newlength + 1])
764 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
765 unsigned int index, unsigned char *buf)
769 /* Try to read the string descriptor by asking for the maximum
770 * possible number of bytes */
771 rc = usb_get_string(dev, langid, index, buf, 255);
773 /* If that failed try to read the descriptor length, then
774 * ask for just that many bytes */
776 rc = usb_get_string(dev, langid, index, buf, 2);
778 rc = usb_get_string(dev, langid, index, buf, buf[0]);
782 if (!buf[0] && !buf[1])
783 usb_try_string_workarounds(buf, &rc);
785 /* There might be extra junk at the end of the descriptor */
789 rc = rc - (rc & 1); /* force a multiple of two */
799 /********************************************************************
801 * Get string index and translate it to ascii.
802 * returns string length (> 0) or error (< 0)
804 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
806 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
811 if (size <= 0 || !buf || !index)
816 /* get langid for strings if it's not yet known */
817 if (!dev->have_langid) {
818 err = usb_string_sub(dev, 0, 0, tbuf);
820 debug("error getting string descriptor 0 " \
821 "(error=%lx)\n", dev->status);
823 } else if (tbuf[0] < 4) {
824 debug("string descriptor 0 too short\n");
827 dev->have_langid = -1;
828 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
829 /* always use the first langid listed */
830 debug("USB device number %d default " \
831 "language ID 0x%x\n",
832 dev->devnum, dev->string_langid);
836 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
840 size--; /* leave room for trailing NULL char in output buffer */
841 for (idx = 0, u = 2; u < err; u += 2) {
844 if (tbuf[u+1]) /* high byte */
845 buf[idx++] = '?'; /* non-ASCII character */
847 buf[idx++] = tbuf[u];
855 /********************************************************************
856 * USB device handling:
857 * the USB device are static allocated [USB_MAX_DEVICE].
860 #if !CONFIG_IS_ENABLED(DM_USB)
862 /* returns a pointer to the device with the index [index].
863 * if the device is not assigned (dev->devnum==-1) returns NULL
865 struct usb_device *usb_get_dev_index(int index)
867 if (usb_dev[index].devnum == -1)
870 return &usb_dev[index];
873 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
876 debug("New Device %d\n", dev_index);
877 if (dev_index == USB_MAX_DEVICE) {
878 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
881 /* default Address is 0, real addresses start with 1 */
882 usb_dev[dev_index].devnum = dev_index + 1;
883 usb_dev[dev_index].maxchild = 0;
884 for (i = 0; i < USB_MAXCHILDREN; i++)
885 usb_dev[dev_index].children[i] = NULL;
886 usb_dev[dev_index].parent = NULL;
887 usb_dev[dev_index].controller = controller;
889 *devp = &usb_dev[dev_index - 1];
895 * Free the newly created device node.
896 * Called in error cases where configuring a newly attached
897 * device fails for some reason.
899 void usb_free_device(struct udevice *controller)
902 debug("Freeing device node: %d\n", dev_index);
903 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
904 usb_dev[dev_index].devnum = -1;
908 * XHCI issues Enable Slot command and thereafter
909 * allocates device contexts. Provide a weak alias
910 * function for the purpose, so that XHCI overrides it
911 * and EHCI/OHCI just work out of the box.
913 __weak int usb_alloc_device(struct usb_device *udev)
917 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
919 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
922 usb_reset_root_port(dev);
927 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
929 __maybe_unused struct usb_device_descriptor *desc;
930 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
933 desc = (struct usb_device_descriptor *)tmpbuf;
935 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
936 if (err < expect_len) {
938 printf("unable to get device descriptor (error=%d)\n",
942 printf("USB device descriptor short read (expected %i, got %i)\n",
947 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
952 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
955 * This is a Windows scheme of initialization sequence, with double
956 * reset of the device (Linux uses the same sequence)
957 * Some equipment is said to work only with such init sequence; this
958 * patch is based on the work by Alan Stern:
959 * http://sourceforge.net/mailarchive/forum.php?
960 * thread_id=5729457&forum_id=5398
964 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
965 * only 18 bytes long, this will terminate with a short packet. But if
966 * the maxpacket size is 8 or 16 the device may be waiting to transmit
967 * some more, or keeps on retransmitting the 8 byte header.
970 if (dev->speed == USB_SPEED_LOW) {
971 dev->descriptor.bMaxPacketSize0 = 8;
972 dev->maxpacketsize = PACKET_SIZE_8;
974 dev->descriptor.bMaxPacketSize0 = 64;
975 dev->maxpacketsize = PACKET_SIZE_64;
977 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
978 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
980 if (do_read && dev->speed == USB_SPEED_FULL) {
984 * Validate we've received only at least 8 bytes, not that
985 * we've received the entire descriptor. The reasoning is:
986 * - The code only uses fields in the first 8 bytes, so
987 * that's all we need to have fetched at this stage.
988 * - The smallest maxpacket size is 8 bytes. Before we know
989 * the actual maxpacket the device uses, the USB controller
990 * may only accept a single packet. Consequently we are only
991 * guaranteed to receive 1 packet (at least 8 bytes) even in
994 * At least the DWC2 controller needs to be programmed with
995 * the number of packets in addition to the number of bytes.
996 * A request for 64 bytes of data with the maxpacket guessed
997 * as 64 (above) yields a request for 1 packet.
999 err = get_descriptor_len(dev, 64, 8);
1004 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
1005 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
1006 switch (dev->descriptor.bMaxPacketSize0) {
1008 dev->maxpacketsize = PACKET_SIZE_8;
1011 dev->maxpacketsize = PACKET_SIZE_16;
1014 dev->maxpacketsize = PACKET_SIZE_32;
1017 dev->maxpacketsize = PACKET_SIZE_64;
1020 printf("%s: invalid max packet size\n", __func__);
1027 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1028 struct usb_device *parent)
1033 * Allocate usb 3.0 device context.
1034 * USB 3.0 (xHCI) protocol tries to allocate device slot
1035 * and related data structures first. This call does that.
1036 * Refer to sec 4.3.2 in xHCI spec rev1.0
1038 err = usb_alloc_device(dev);
1040 printf("Cannot allocate device context to get SLOT_ID\n");
1043 err = usb_setup_descriptor(dev, do_read);
1046 err = usb_hub_port_reset(dev, parent);
1052 err = usb_set_address(dev); /* set address */
1055 printf("\n USB device not accepting new address " \
1056 "(error=%lX)\n", dev->status);
1060 mdelay(10); /* Let the SET_ADDRESS settle */
1063 * If we haven't read device descriptor before, read it here
1064 * after device is assigned an address. This is only applicable
1068 err = usb_setup_descriptor(dev, true);
1076 int usb_select_config(struct usb_device *dev)
1078 unsigned char *tmpbuf = NULL;
1081 err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1085 /* correct le values */
1086 le16_to_cpus(&dev->descriptor.bcdUSB);
1087 le16_to_cpus(&dev->descriptor.idVendor);
1088 le16_to_cpus(&dev->descriptor.idProduct);
1089 le16_to_cpus(&dev->descriptor.bcdDevice);
1092 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1093 * about this first Get Descriptor request. If there are any other
1094 * requests in the first microframe, the stick crashes. Wait about
1095 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1099 /* only support for one config for now */
1100 err = usb_get_configuration_len(dev, 0);
1102 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1106 err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1109 printf("usb_new_device: Cannot read configuration, " \
1110 "skipping device %04x:%04x\n",
1111 dev->descriptor.idVendor, dev->descriptor.idProduct);
1115 usb_parse_config(dev, tmpbuf, 0);
1117 usb_set_maxpacket(dev);
1119 * we set the default configuration here
1120 * This seems premature. If the driver wants a different configuration
1121 * it will need to select itself.
1123 err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1125 printf("failed to set default configuration " \
1126 "len %d, status %lX\n", dev->act_len, dev->status);
1131 * Wait until the Set Configuration request gets processed by the
1132 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1133 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1137 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1138 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1139 dev->descriptor.iSerialNumber);
1140 memset(dev->mf, 0, sizeof(dev->mf));
1141 memset(dev->prod, 0, sizeof(dev->prod));
1142 memset(dev->serial, 0, sizeof(dev->serial));
1143 if (dev->descriptor.iManufacturer)
1144 usb_string(dev, dev->descriptor.iManufacturer,
1145 dev->mf, sizeof(dev->mf));
1146 if (dev->descriptor.iProduct)
1147 usb_string(dev, dev->descriptor.iProduct,
1148 dev->prod, sizeof(dev->prod));
1149 if (dev->descriptor.iSerialNumber)
1150 usb_string(dev, dev->descriptor.iSerialNumber,
1151 dev->serial, sizeof(dev->serial));
1152 debug("Manufacturer %s\n", dev->mf);
1153 debug("Product %s\n", dev->prod);
1154 debug("SerialNumber %s\n", dev->serial);
1159 int usb_setup_device(struct usb_device *dev, bool do_read,
1160 struct usb_device *parent)
1165 /* We still haven't set the Address yet */
1169 ret = usb_prepare_device(dev, addr, do_read, parent);
1172 ret = usb_select_config(dev);
1177 #if !CONFIG_IS_ENABLED(DM_USB)
1179 * By the time we get here, the device has gotten a new device ID
1180 * and is in the default state. We need to identify the thing and
1181 * get the ball rolling..
1183 * Returns 0 for success, != 0 for error.
1185 int usb_new_device(struct usb_device *dev)
1187 bool do_read = true;
1191 * XHCI needs to issue a Address device command to setup
1192 * proper device context structures, before it can interact
1193 * with the device. So a get_descriptor will fail before any
1194 * of that is done for XHCI unlike EHCI.
1196 #ifdef CONFIG_USB_XHCI_HCD
1199 err = usb_setup_device(dev, do_read, dev->parent);
1203 /* Now probe if the device is a hub */
1204 err = usb_hub_probe(dev, 0);
1213 int board_usb_init(int index, enum usb_init_type init)
1219 int board_usb_cleanup(int index, enum usb_init_type init)
1224 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1226 #if CONFIG_IS_ENABLED(DM_USB)
1229 return parent->children[port] != NULL;
1233 #if CONFIG_IS_ENABLED(DM_USB)
1234 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1235 uint8_t *hub_address, uint8_t *hub_port)
1237 struct udevice *parent;
1238 struct usb_device *uparent, *ttdev;
1241 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1242 * to the parent udevice, not the actual udevice belonging to the
1243 * udev as the device is not instantiated yet. So when searching
1244 * for the first usb-2 parent start with udev->dev not
1245 * udev->dev->parent .
1249 uparent = dev_get_parent_priv(parent);
1251 while (uparent->speed != USB_SPEED_HIGH) {
1252 struct udevice *dev = parent;
1254 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1255 printf("Error: Cannot find high speed parent of usb-1 device\n");
1261 ttdev = dev_get_parent_priv(dev);
1262 parent = dev->parent;
1263 uparent = dev_get_parent_priv(parent);
1265 *hub_address = uparent->devnum;
1266 *hub_port = ttdev->portnr;
1269 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1270 uint8_t *hub_address, uint8_t *hub_port)
1272 /* Find out the nearest parent which is high speed */
1273 while (udev->parent->parent != NULL)
1274 if (udev->parent->speed != USB_SPEED_HIGH) {
1275 udev = udev->parent;
1277 *hub_address = udev->parent->devnum;
1278 *hub_port = udev->portnr;
1282 printf("Error: Cannot find high speed parent of usb-1 device\n");