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 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
53 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
56 /***************************************************************************
62 struct usb_device *dev;
63 int i, start_index = 0;
64 int controllers_initialized = 0;
71 /* first make all devices unknown */
72 for (i = 0; i < USB_MAX_DEVICE; i++) {
73 memset(&usb_dev[i], 0, sizeof(struct usb_device));
74 usb_dev[i].devnum = -1;
77 /* init low_level USB */
78 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
79 /* init low_level USB */
81 ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl);
82 if (ret == -ENODEV) { /* No such device. */
83 puts("Port not available.\n");
84 controllers_initialized++;
88 if (ret) { /* Other error. */
89 puts("lowlevel init failed\n");
93 * lowlevel init is OK, now scan the bus for devices
94 * i.e. search HUBs and configure them
96 controllers_initialized++;
97 start_index = dev_index;
98 printf("scanning bus %d for devices... ", i);
99 ret = usb_alloc_new_device(ctrl, &dev);
104 * device 0 is always present
105 * (root hub, so let it analyze)
107 ret = usb_new_device(dev);
109 usb_free_device(dev->controller);
111 if (start_index == dev_index) {
112 puts("No USB Device found\n");
115 printf("%d USB Device(s) found\n",
116 dev_index - start_index);
123 /* if we were not able to find at least one working bus, bail out */
124 if (controllers_initialized == 0)
125 puts("USB error: all controllers failed lowlevel init\n");
127 return usb_started ? 0 : -ENODEV;
130 /******************************************************************************
131 * Stop USB this stops the LowLevel Part and deregisters USB devices.
142 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
143 if (usb_lowlevel_stop(i))
144 printf("failed to stop USB controller %d\n", i);
151 /******************************************************************************
152 * Detect if a USB device has been plugged or unplugged.
154 int usb_detect_change(void)
159 for (j = 0; j < USB_MAX_DEVICE; j++) {
160 for (i = 0; i < usb_dev[j].maxchild; i++) {
161 struct usb_port_status status;
163 if (usb_get_port_status(&usb_dev[j], i + 1,
165 /* USB request failed */
168 if (le16_to_cpu(status.wPortChange) &
169 USB_PORT_STAT_C_CONNECTION)
177 /* Lock or unlock async schedule on the controller */
178 __weak int usb_lock_async(struct usb_device *dev, int lock)
184 * disables the asynch behaviour of the control message. This is used for data
185 * transfers that uses the exclusiv access to the control and bulk messages.
186 * Returns the old value so it can be restored later.
188 int usb_disable_asynch(int disable)
190 int old_value = asynch_allowed;
192 asynch_allowed = !disable;
195 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
198 /*-------------------------------------------------------------------
204 * submits an Interrupt Message. Some drivers may implement non-blocking
205 * polling: when non-block is true and the device is not responding return
206 * -EAGAIN instead of waiting for device to respond.
208 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
209 void *buffer, int transfer_len, int interval, bool nonblock)
211 return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
216 * submits a control message and waits for comletion (at least timeout * 1ms)
217 * If timeout is 0, we don't wait for completion (used as example to set and
218 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
219 * allow control messages with 0 timeout, by previousely resetting the flag
220 * asynch_allowed (usb_disable_asynch(1)).
221 * returns the transferred length if OK or -1 if error. The transferred length
222 * and the current status are stored in the dev->act_len and dev->status.
224 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
225 unsigned char request, unsigned char requesttype,
226 unsigned short value, unsigned short index,
227 void *data, unsigned short size, int timeout)
229 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
232 if ((timeout == 0) && (!asynch_allowed)) {
233 /* request for a asynch control pipe is not allowed */
237 /* set setup command */
238 setup_packet->requesttype = requesttype;
239 setup_packet->request = request;
240 setup_packet->value = cpu_to_le16(value);
241 setup_packet->index = cpu_to_le16(index);
242 setup_packet->length = cpu_to_le16(size);
243 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
244 "value 0x%X index 0x%X length 0x%X\n",
245 request, requesttype, value, index, size);
246 dev->status = USB_ST_NOT_PROC; /*not yet processed */
248 err = submit_control_msg(dev, pipe, data, size, setup_packet);
255 * Wait for status to update until timeout expires, USB driver
256 * interrupt handler may set the status when the USB operation has
260 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
271 /*-------------------------------------------------------------------
272 * submits bulk message, and waits for completion. returns 0 if Ok or
274 * synchronous behavior
276 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
277 void *data, int len, int *actual_length, int timeout)
281 dev->status = USB_ST_NOT_PROC; /*not yet processed */
282 if (submit_bulk_msg(dev, pipe, data, len) < 0)
285 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
289 *actual_length = dev->act_len;
290 if (dev->status == 0)
297 /*-------------------------------------------------------------------
302 * returns the max packet size, depending on the pipe direction and
303 * the configurations values
305 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
307 /* direction is out -> use emaxpacket out */
308 if ((pipe & USB_DIR_IN) == 0)
309 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
311 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
315 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
316 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
317 * when it is inlined in 1 single routine. What happens is that the register r3
318 * is used as loop-count 'i', but gets overwritten later on.
319 * This is clearly a compiler bug, but it is easier to workaround it here than
320 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
321 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
323 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
326 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
329 struct usb_endpoint_descriptor *ep;
330 u16 ep_wMaxPacketSize;
332 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
334 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
335 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
337 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
338 USB_ENDPOINT_XFER_CONTROL) {
339 /* Control => bidirectional */
340 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
341 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
342 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
343 b, dev->epmaxpacketin[b]);
345 if ((ep->bEndpointAddress & 0x80) == 0) {
347 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
348 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
349 debug("##EP epmaxpacketout[%d] = %d\n",
350 b, dev->epmaxpacketout[b]);
354 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
355 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
356 debug("##EP epmaxpacketin[%d] = %d\n",
357 b, dev->epmaxpacketin[b]);
364 * set the max packed value of all endpoints in the given configuration
366 static int usb_set_maxpacket(struct usb_device *dev)
370 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
371 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
372 usb_set_maxpacket_ep(dev, i, ii);
377 /*******************************************************************************
378 * Parse the config, located in buffer, and fills the dev->config structure.
379 * Note that all little/big endian swapping are done automatically.
380 * (wTotalLength has already been swapped and sanitized when it was read.)
382 static int usb_parse_config(struct usb_device *dev,
383 unsigned char *buffer, int cfgno)
385 struct usb_descriptor_header *head;
386 int index, ifno, epno, curr_if_num;
387 u16 ep_wMaxPacketSize;
388 struct usb_interface *if_desc = NULL;
394 dev->configno = cfgno;
395 head = (struct usb_descriptor_header *) &buffer[0];
396 if (head->bDescriptorType != USB_DT_CONFIG) {
397 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
398 head->bDescriptorType);
401 if (head->bLength != USB_DT_CONFIG_SIZE) {
402 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
405 memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
406 dev->config.no_of_if = 0;
408 index = dev->config.desc.bLength;
409 /* Ok the first entry must be a configuration entry,
410 * now process the others */
411 head = (struct usb_descriptor_header *) &buffer[index];
412 while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
413 switch (head->bDescriptorType) {
414 case USB_DT_INTERFACE:
415 if (head->bLength != USB_DT_INTERFACE_SIZE) {
416 printf("ERROR: Invalid USB IF length (%d)\n",
420 if (index + USB_DT_INTERFACE_SIZE >
421 dev->config.desc.wTotalLength) {
422 puts("USB IF descriptor overflowed buffer!\n");
425 if (((struct usb_interface_descriptor *) \
426 head)->bInterfaceNumber != curr_if_num) {
427 /* this is a new interface, copy new desc */
428 ifno = dev->config.no_of_if;
429 if (ifno >= USB_MAXINTERFACES) {
430 puts("Too many USB interfaces!\n");
431 /* try to go on with what we have */
434 if_desc = &dev->config.if_desc[ifno];
435 dev->config.no_of_if++;
436 memcpy(if_desc, head,
437 USB_DT_INTERFACE_SIZE);
438 if_desc->no_of_ep = 0;
439 if_desc->num_altsetting = 1;
441 if_desc->desc.bInterfaceNumber;
443 /* found alternate setting for the interface */
445 if_desc = &dev->config.if_desc[ifno];
446 if_desc->num_altsetting++;
450 case USB_DT_ENDPOINT:
451 if (head->bLength != USB_DT_ENDPOINT_SIZE &&
452 head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
453 printf("ERROR: Invalid USB EP length (%d)\n",
457 if (index + head->bLength >
458 dev->config.desc.wTotalLength) {
459 puts("USB EP descriptor overflowed buffer!\n");
463 puts("Endpoint descriptor out of order!\n");
466 epno = dev->config.if_desc[ifno].no_of_ep;
467 if_desc = &dev->config.if_desc[ifno];
468 if (epno >= USB_MAXENDPOINTS) {
469 printf("Interface %d has too many endpoints!\n",
470 if_desc->desc.bInterfaceNumber);
473 /* found an endpoint */
475 memcpy(&if_desc->ep_desc[epno], head,
476 USB_DT_ENDPOINT_SIZE);
477 ep_wMaxPacketSize = get_unaligned(&dev->config.\
481 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
486 debug("if %d, ep %d\n", ifno, epno);
488 case USB_DT_SS_ENDPOINT_COMP:
489 if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
490 printf("ERROR: Invalid USB EPC length (%d)\n",
494 if (index + USB_DT_SS_EP_COMP_SIZE >
495 dev->config.desc.wTotalLength) {
496 puts("USB EPC descriptor overflowed buffer!\n");
499 if (ifno < 0 || epno < 0) {
500 puts("EPC descriptor out of order!\n");
503 if_desc = &dev->config.if_desc[ifno];
504 memcpy(&if_desc->ss_ep_comp_desc[epno], head,
505 USB_DT_SS_EP_COMP_SIZE);
508 if (head->bLength == 0)
511 debug("unknown Description Type : %x\n",
512 head->bDescriptorType);
516 unsigned char *ch = (unsigned char *)head;
519 for (i = 0; i < head->bLength; i++)
520 debug("%02X ", *ch++);
526 index += head->bLength;
527 head = (struct usb_descriptor_header *)&buffer[index];
532 /***********************************************************************
534 * endp: endpoint number in bits 0-3;
535 * direction flag in bit 7 (1 = IN, 0 = OUT)
537 int usb_clear_halt(struct usb_device *dev, int pipe)
540 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
542 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
543 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
544 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
546 /* don't clear if failed */
551 * NOTE: we do not get status and verify reset was successful
552 * as some devices are reported to lock up upon this check..
555 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
557 /* toggle is reset on clear */
558 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
563 /**********************************************************************
564 * get_descriptor type
566 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
567 unsigned char index, void *buf, int size)
569 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
570 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
571 (type << 8) + index, 0, buf, size,
575 /**********************************************************************
576 * gets len of configuration cfgno
578 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
581 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
582 struct usb_config_descriptor *config;
584 config = (struct usb_config_descriptor *)&buffer[0];
585 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
588 printf("unable to get descriptor, error %lX\n",
591 printf("config descriptor too short " \
592 "(expected %i, got %i)\n", 9, result);
595 return le16_to_cpu(config->wTotalLength);
598 /**********************************************************************
599 * gets configuration cfgno and store it in the buffer
601 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
602 unsigned char *buffer, int length)
605 struct usb_config_descriptor *config;
607 config = (struct usb_config_descriptor *)&buffer[0];
608 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
609 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
610 le16_to_cpu(config->wTotalLength));
611 config->wTotalLength = result; /* validated, with CPU byte order */
616 /********************************************************************
617 * set address of a device to the value in dev->devnum.
618 * This can only be done by addressing the device via the default address (0)
620 static int usb_set_address(struct usb_device *dev)
622 debug("set address %d\n", dev->devnum);
624 return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
625 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
628 /********************************************************************
629 * set interface number to interface
631 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
633 struct usb_interface *if_face = NULL;
636 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
637 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
638 if_face = &dev->config.if_desc[i];
643 printf("selecting invalid interface %d", interface);
647 * We should return now for devices with only one alternate setting.
648 * According to 9.4.10 of the Universal Serial Bus Specification
649 * Revision 2.0 such devices can return with a STALL. This results in
650 * some USB sticks timeouting during initialization and then being
651 * unusable in U-Boot.
653 if (if_face->num_altsetting == 1)
656 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
657 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
658 alternate, interface, NULL, 0,
659 USB_CNTL_TIMEOUT * 5);
666 /********************************************************************
667 * set configuration number to configuration
669 static int usb_set_configuration(struct usb_device *dev, int configuration)
672 debug("set configuration %d\n", configuration);
673 /* set setup command */
674 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
675 USB_REQ_SET_CONFIGURATION, 0,
677 NULL, 0, USB_CNTL_TIMEOUT);
686 /********************************************************************
687 * set protocol to protocol
689 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
691 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
692 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
693 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
696 /********************************************************************
699 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
701 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
702 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
703 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
706 /********************************************************************
709 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
710 unsigned char id, void *buf, int size)
712 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
714 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
715 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
718 /********************************************************************
719 * get class descriptor
721 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
722 unsigned char type, unsigned char id, void *buf, int size)
724 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
725 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
726 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
729 /********************************************************************
730 * get string index in buffer
732 static int usb_get_string(struct usb_device *dev, unsigned short langid,
733 unsigned char index, void *buf, int size)
738 for (i = 0; i < 3; ++i) {
739 /* some devices are flaky */
740 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
741 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
742 (USB_DT_STRING << 8) + index, langid, buf, size,
753 static void usb_try_string_workarounds(unsigned char *buf, int *length)
755 int newlength, oldlength = *length;
757 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
758 if (!isprint(buf[newlength]) || buf[newlength + 1])
768 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
769 unsigned int index, unsigned char *buf)
773 /* Try to read the string descriptor by asking for the maximum
774 * possible number of bytes */
775 rc = usb_get_string(dev, langid, index, buf, 255);
777 /* If that failed try to read the descriptor length, then
778 * ask for just that many bytes */
780 rc = usb_get_string(dev, langid, index, buf, 2);
782 rc = usb_get_string(dev, langid, index, buf, buf[0]);
786 if (!buf[0] && !buf[1])
787 usb_try_string_workarounds(buf, &rc);
789 /* There might be extra junk at the end of the descriptor */
793 rc = rc - (rc & 1); /* force a multiple of two */
803 /********************************************************************
805 * Get string index and translate it to ascii.
806 * returns string length (> 0) or error (< 0)
808 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
810 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
815 if (size <= 0 || !buf || !index)
820 /* get langid for strings if it's not yet known */
821 if (!dev->have_langid) {
822 err = usb_string_sub(dev, 0, 0, tbuf);
824 debug("error getting string descriptor 0 " \
825 "(error=%lx)\n", dev->status);
827 } else if (tbuf[0] < 4) {
828 debug("string descriptor 0 too short\n");
831 dev->have_langid = -1;
832 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
833 /* always use the first langid listed */
834 debug("USB device number %d default " \
835 "language ID 0x%x\n",
836 dev->devnum, dev->string_langid);
840 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
844 size--; /* leave room for trailing NULL char in output buffer */
845 for (idx = 0, u = 2; u < err; u += 2) {
848 if (tbuf[u+1]) /* high byte */
849 buf[idx++] = '?'; /* non-ASCII character */
851 buf[idx++] = tbuf[u];
859 /********************************************************************
860 * USB device handling:
861 * the USB device are static allocated [USB_MAX_DEVICE].
864 #if !CONFIG_IS_ENABLED(DM_USB)
866 /* returns a pointer to the device with the index [index].
867 * if the device is not assigned (dev->devnum==-1) returns NULL
869 struct usb_device *usb_get_dev_index(int index)
871 if (usb_dev[index].devnum == -1)
874 return &usb_dev[index];
877 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
880 debug("New Device %d\n", dev_index);
881 if (dev_index == USB_MAX_DEVICE) {
882 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
885 /* default Address is 0, real addresses start with 1 */
886 usb_dev[dev_index].devnum = dev_index + 1;
887 usb_dev[dev_index].maxchild = 0;
888 for (i = 0; i < USB_MAXCHILDREN; i++)
889 usb_dev[dev_index].children[i] = NULL;
890 usb_dev[dev_index].parent = NULL;
891 usb_dev[dev_index].controller = controller;
893 *devp = &usb_dev[dev_index - 1];
899 * Free the newly created device node.
900 * Called in error cases where configuring a newly attached
901 * device fails for some reason.
903 void usb_free_device(struct udevice *controller)
906 debug("Freeing device node: %d\n", dev_index);
907 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
908 usb_dev[dev_index].devnum = -1;
912 * XHCI issues Enable Slot command and thereafter
913 * allocates device contexts. Provide a weak alias
914 * function for the purpose, so that XHCI overrides it
915 * and EHCI/OHCI just work out of the box.
917 __weak int usb_alloc_device(struct usb_device *udev)
921 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
923 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
926 usb_reset_root_port(dev);
931 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
933 __maybe_unused struct usb_device_descriptor *desc;
934 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
937 desc = (struct usb_device_descriptor *)tmpbuf;
939 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
940 if (err < expect_len) {
942 printf("unable to get device descriptor (error=%d)\n",
946 printf("USB device descriptor short read (expected %i, got %i)\n",
951 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
956 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
959 * This is a Windows scheme of initialization sequence, with double
960 * reset of the device (Linux uses the same sequence)
961 * Some equipment is said to work only with such init sequence; this
962 * patch is based on the work by Alan Stern:
963 * http://sourceforge.net/mailarchive/forum.php?
964 * thread_id=5729457&forum_id=5398
968 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
969 * only 18 bytes long, this will terminate with a short packet. But if
970 * the maxpacket size is 8 or 16 the device may be waiting to transmit
971 * some more, or keeps on retransmitting the 8 byte header.
974 if (dev->speed == USB_SPEED_LOW) {
975 dev->descriptor.bMaxPacketSize0 = 8;
976 dev->maxpacketsize = PACKET_SIZE_8;
978 dev->descriptor.bMaxPacketSize0 = 64;
979 dev->maxpacketsize = PACKET_SIZE_64;
981 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
982 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
984 if (do_read && dev->speed == USB_SPEED_FULL) {
988 * Validate we've received only at least 8 bytes, not that
989 * we've received the entire descriptor. The reasoning is:
990 * - The code only uses fields in the first 8 bytes, so
991 * that's all we need to have fetched at this stage.
992 * - The smallest maxpacket size is 8 bytes. Before we know
993 * the actual maxpacket the device uses, the USB controller
994 * may only accept a single packet. Consequently we are only
995 * guaranteed to receive 1 packet (at least 8 bytes) even in
998 * At least the DWC2 controller needs to be programmed with
999 * the number of packets in addition to the number of bytes.
1000 * A request for 64 bytes of data with the maxpacket guessed
1001 * as 64 (above) yields a request for 1 packet.
1003 err = get_descriptor_len(dev, 64, 8);
1008 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
1009 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
1010 switch (dev->descriptor.bMaxPacketSize0) {
1012 dev->maxpacketsize = PACKET_SIZE_8;
1015 dev->maxpacketsize = PACKET_SIZE_16;
1018 dev->maxpacketsize = PACKET_SIZE_32;
1021 dev->maxpacketsize = PACKET_SIZE_64;
1024 printf("%s: invalid max packet size\n", __func__);
1031 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1032 struct usb_device *parent)
1037 * Allocate usb 3.0 device context.
1038 * USB 3.0 (xHCI) protocol tries to allocate device slot
1039 * and related data structures first. This call does that.
1040 * Refer to sec 4.3.2 in xHCI spec rev1.0
1042 err = usb_alloc_device(dev);
1044 printf("Cannot allocate device context to get SLOT_ID\n");
1047 err = usb_setup_descriptor(dev, do_read);
1050 err = usb_hub_port_reset(dev, parent);
1056 err = usb_set_address(dev); /* set address */
1059 printf("\n USB device not accepting new address " \
1060 "(error=%lX)\n", dev->status);
1064 mdelay(10); /* Let the SET_ADDRESS settle */
1067 * If we haven't read device descriptor before, read it here
1068 * after device is assigned an address. This is only applicable
1072 err = usb_setup_descriptor(dev, true);
1080 int usb_select_config(struct usb_device *dev)
1082 unsigned char *tmpbuf = NULL;
1085 err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1089 /* correct le values */
1090 le16_to_cpus(&dev->descriptor.bcdUSB);
1091 le16_to_cpus(&dev->descriptor.idVendor);
1092 le16_to_cpus(&dev->descriptor.idProduct);
1093 le16_to_cpus(&dev->descriptor.bcdDevice);
1096 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1097 * about this first Get Descriptor request. If there are any other
1098 * requests in the first microframe, the stick crashes. Wait about
1099 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1103 /* only support for one config for now */
1104 err = usb_get_configuration_len(dev, 0);
1106 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1110 err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1113 printf("usb_new_device: Cannot read configuration, " \
1114 "skipping device %04x:%04x\n",
1115 dev->descriptor.idVendor, dev->descriptor.idProduct);
1119 usb_parse_config(dev, tmpbuf, 0);
1121 usb_set_maxpacket(dev);
1123 * we set the default configuration here
1124 * This seems premature. If the driver wants a different configuration
1125 * it will need to select itself.
1127 err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1129 printf("failed to set default configuration " \
1130 "len %d, status %lX\n", dev->act_len, dev->status);
1135 * Wait until the Set Configuration request gets processed by the
1136 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1137 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1141 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1142 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1143 dev->descriptor.iSerialNumber);
1144 memset(dev->mf, 0, sizeof(dev->mf));
1145 memset(dev->prod, 0, sizeof(dev->prod));
1146 memset(dev->serial, 0, sizeof(dev->serial));
1147 if (dev->descriptor.iManufacturer)
1148 usb_string(dev, dev->descriptor.iManufacturer,
1149 dev->mf, sizeof(dev->mf));
1150 if (dev->descriptor.iProduct)
1151 usb_string(dev, dev->descriptor.iProduct,
1152 dev->prod, sizeof(dev->prod));
1153 if (dev->descriptor.iSerialNumber)
1154 usb_string(dev, dev->descriptor.iSerialNumber,
1155 dev->serial, sizeof(dev->serial));
1156 debug("Manufacturer %s\n", dev->mf);
1157 debug("Product %s\n", dev->prod);
1158 debug("SerialNumber %s\n", dev->serial);
1163 int usb_setup_device(struct usb_device *dev, bool do_read,
1164 struct usb_device *parent)
1169 /* We still haven't set the Address yet */
1173 ret = usb_prepare_device(dev, addr, do_read, parent);
1176 ret = usb_select_config(dev);
1181 #if !CONFIG_IS_ENABLED(DM_USB)
1183 * By the time we get here, the device has gotten a new device ID
1184 * and is in the default state. We need to identify the thing and
1185 * get the ball rolling..
1187 * Returns 0 for success, != 0 for error.
1189 int usb_new_device(struct usb_device *dev)
1191 bool do_read = true;
1195 * XHCI needs to issue a Address device command to setup
1196 * proper device context structures, before it can interact
1197 * with the device. So a get_descriptor will fail before any
1198 * of that is done for XHCI unlike EHCI.
1200 #ifdef CONFIG_USB_XHCI_HCD
1203 err = usb_setup_device(dev, do_read, dev->parent);
1207 /* Now probe if the device is a hub */
1208 err = usb_hub_probe(dev, 0);
1217 int board_usb_init(int index, enum usb_init_type init)
1223 int board_usb_cleanup(int index, enum usb_init_type init)
1228 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1230 #if CONFIG_IS_ENABLED(DM_USB)
1233 return parent->children[port] != NULL;
1237 #if CONFIG_IS_ENABLED(DM_USB)
1238 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1239 uint8_t *hub_address, uint8_t *hub_port)
1241 struct udevice *parent;
1242 struct usb_device *uparent, *ttdev;
1245 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1246 * to the parent udevice, not the actual udevice belonging to the
1247 * udev as the device is not instantiated yet. So when searching
1248 * for the first usb-2 parent start with udev->dev not
1249 * udev->dev->parent .
1253 uparent = dev_get_parent_priv(parent);
1255 while (uparent->speed != USB_SPEED_HIGH) {
1256 struct udevice *dev = parent;
1258 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1259 printf("Error: Cannot find high speed parent of usb-1 device\n");
1265 ttdev = dev_get_parent_priv(dev);
1266 parent = dev->parent;
1267 uparent = dev_get_parent_priv(parent);
1269 *hub_address = uparent->devnum;
1270 *hub_port = ttdev->portnr;
1273 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1274 uint8_t *hub_address, uint8_t *hub_port)
1276 /* Find out the nearest parent which is high speed */
1277 while (udev->parent->parent != NULL)
1278 if (udev->parent->speed != USB_SPEED_HIGH) {
1279 udev = udev->parent;
1281 *hub_address = udev->parent->devnum;
1282 *hub_port = udev->portnr;
1286 printf("Error: Cannot find high speed parent of usb-1 device\n");