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.
33 #include <asm/processor.h>
34 #include <linux/compiler.h>
35 #include <linux/ctype.h>
36 #include <asm/byteorder.h>
37 #include <asm/unaligned.h>
41 #define USB_BUFSIZ 512
43 static int asynch_allowed;
44 char usb_started; /* flag for the started/stopped USB status */
46 #if !CONFIG_IS_ENABLED(DM_USB)
47 static struct usb_device usb_dev[USB_MAX_DEVICE];
50 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
51 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
54 /***************************************************************************
60 struct usb_device *dev;
61 int i, start_index = 0;
62 int controllers_initialized = 0;
69 /* first make all devices unknown */
70 for (i = 0; i < USB_MAX_DEVICE; i++) {
71 memset(&usb_dev[i], 0, sizeof(struct usb_device));
72 usb_dev[i].devnum = -1;
75 /* init low_level USB */
76 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
77 /* init low_level USB */
79 ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl);
80 if (ret == -ENODEV) { /* No such device. */
81 puts("Port not available.\n");
82 controllers_initialized++;
86 if (ret) { /* Other error. */
87 puts("lowlevel init failed\n");
91 * lowlevel init is OK, now scan the bus for devices
92 * i.e. search HUBs and configure them
94 controllers_initialized++;
95 start_index = dev_index;
96 printf("scanning bus %d for devices... ", i);
97 ret = usb_alloc_new_device(ctrl, &dev);
102 * device 0 is always present
103 * (root hub, so let it analyze)
105 ret = usb_new_device(dev);
107 usb_free_device(dev->controller);
109 if (start_index == dev_index) {
110 puts("No USB Device found\n");
113 printf("%d USB Device(s) found\n",
114 dev_index - start_index);
121 /* if we were not able to find at least one working bus, bail out */
122 if (controllers_initialized == 0)
123 puts("USB error: all controllers failed lowlevel init\n");
125 return usb_started ? 0 : -ENODEV;
128 /******************************************************************************
129 * Stop USB this stops the LowLevel Part and deregisters USB devices.
140 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
141 if (usb_lowlevel_stop(i))
142 printf("failed to stop USB controller %d\n", i);
149 /******************************************************************************
150 * Detect if a USB device has been plugged or unplugged.
152 int usb_detect_change(void)
157 for (j = 0; j < USB_MAX_DEVICE; j++) {
158 for (i = 0; i < usb_dev[j].maxchild; i++) {
159 struct usb_port_status status;
161 if (usb_get_port_status(&usb_dev[j], i + 1,
163 /* USB request failed */
166 if (le16_to_cpu(status.wPortChange) &
167 USB_PORT_STAT_C_CONNECTION)
175 /* Lock or unlock async schedule on the controller */
176 __weak int usb_lock_async(struct usb_device *dev, int lock)
182 * disables the asynch behaviour of the control message. This is used for data
183 * transfers that uses the exclusiv access to the control and bulk messages.
184 * Returns the old value so it can be restored later.
186 int usb_disable_asynch(int disable)
188 int old_value = asynch_allowed;
190 asynch_allowed = !disable;
193 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
196 /*-------------------------------------------------------------------
202 * submits an Interrupt Message. Some drivers may implement non-blocking
203 * polling: when non-block is true and the device is not responding return
204 * -EAGAIN instead of waiting for device to respond.
206 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
207 void *buffer, int transfer_len, int interval, bool nonblock)
209 return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
214 * submits a control message and waits for comletion (at least timeout * 1ms)
215 * If timeout is 0, we don't wait for completion (used as example to set and
216 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
217 * allow control messages with 0 timeout, by previousely resetting the flag
218 * asynch_allowed (usb_disable_asynch(1)).
219 * returns the transferred length if OK or -1 if error. The transferred length
220 * and the current status are stored in the dev->act_len and dev->status.
222 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
223 unsigned char request, unsigned char requesttype,
224 unsigned short value, unsigned short index,
225 void *data, unsigned short size, int timeout)
227 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
230 if ((timeout == 0) && (!asynch_allowed)) {
231 /* request for a asynch control pipe is not allowed */
235 /* set setup command */
236 setup_packet->requesttype = requesttype;
237 setup_packet->request = request;
238 setup_packet->value = cpu_to_le16(value);
239 setup_packet->index = cpu_to_le16(index);
240 setup_packet->length = cpu_to_le16(size);
241 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
242 "value 0x%X index 0x%X length 0x%X\n",
243 request, requesttype, value, index, size);
244 dev->status = USB_ST_NOT_PROC; /*not yet processed */
246 err = submit_control_msg(dev, pipe, data, size, setup_packet);
253 * Wait for status to update until timeout expires, USB driver
254 * interrupt handler may set the status when the USB operation has
258 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
269 /*-------------------------------------------------------------------
270 * submits bulk message, and waits for completion. returns 0 if Ok or
272 * synchronous behavior
274 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
275 void *data, int len, int *actual_length, int timeout)
279 dev->status = USB_ST_NOT_PROC; /*not yet processed */
280 if (submit_bulk_msg(dev, pipe, data, len) < 0)
283 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
287 *actual_length = dev->act_len;
288 if (dev->status == 0)
295 /*-------------------------------------------------------------------
300 * returns the max packet size, depending on the pipe direction and
301 * the configurations values
303 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
305 /* direction is out -> use emaxpacket out */
306 if ((pipe & USB_DIR_IN) == 0)
307 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
309 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
313 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
314 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
315 * when it is inlined in 1 single routine. What happens is that the register r3
316 * is used as loop-count 'i', but gets overwritten later on.
317 * This is clearly a compiler bug, but it is easier to workaround it here than
318 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
319 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
321 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
324 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
327 struct usb_endpoint_descriptor *ep;
328 u16 ep_wMaxPacketSize;
330 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
332 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
333 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
335 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
336 USB_ENDPOINT_XFER_CONTROL) {
337 /* Control => bidirectional */
338 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
339 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
340 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
341 b, dev->epmaxpacketin[b]);
343 if ((ep->bEndpointAddress & 0x80) == 0) {
345 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
346 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
347 debug("##EP epmaxpacketout[%d] = %d\n",
348 b, dev->epmaxpacketout[b]);
352 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
353 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
354 debug("##EP epmaxpacketin[%d] = %d\n",
355 b, dev->epmaxpacketin[b]);
362 * set the max packed value of all endpoints in the given configuration
364 static int usb_set_maxpacket(struct usb_device *dev)
368 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
369 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
370 usb_set_maxpacket_ep(dev, i, ii);
375 /*******************************************************************************
376 * Parse the config, located in buffer, and fills the dev->config structure.
377 * Note that all little/big endian swapping are done automatically.
378 * (wTotalLength has already been swapped and sanitized when it was read.)
380 static int usb_parse_config(struct usb_device *dev,
381 unsigned char *buffer, int cfgno)
383 struct usb_descriptor_header *head;
384 int index, ifno, epno, curr_if_num;
385 u16 ep_wMaxPacketSize;
386 struct usb_interface *if_desc = NULL;
392 dev->configno = cfgno;
393 head = (struct usb_descriptor_header *) &buffer[0];
394 if (head->bDescriptorType != USB_DT_CONFIG) {
395 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
396 head->bDescriptorType);
399 if (head->bLength != USB_DT_CONFIG_SIZE) {
400 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
403 memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
404 dev->config.no_of_if = 0;
406 index = dev->config.desc.bLength;
407 /* Ok the first entry must be a configuration entry,
408 * now process the others */
409 head = (struct usb_descriptor_header *) &buffer[index];
410 while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
411 switch (head->bDescriptorType) {
412 case USB_DT_INTERFACE:
413 if (head->bLength != USB_DT_INTERFACE_SIZE) {
414 printf("ERROR: Invalid USB IF length (%d)\n",
418 if (index + USB_DT_INTERFACE_SIZE >
419 dev->config.desc.wTotalLength) {
420 puts("USB IF descriptor overflowed buffer!\n");
423 if (((struct usb_interface_descriptor *) \
424 head)->bInterfaceNumber != curr_if_num) {
425 /* this is a new interface, copy new desc */
426 ifno = dev->config.no_of_if;
427 if (ifno >= USB_MAXINTERFACES) {
428 puts("Too many USB interfaces!\n");
429 /* try to go on with what we have */
432 if_desc = &dev->config.if_desc[ifno];
433 dev->config.no_of_if++;
434 memcpy(if_desc, head,
435 USB_DT_INTERFACE_SIZE);
436 if_desc->no_of_ep = 0;
437 if_desc->num_altsetting = 1;
439 if_desc->desc.bInterfaceNumber;
441 /* found alternate setting for the interface */
443 if_desc = &dev->config.if_desc[ifno];
444 if_desc->num_altsetting++;
448 case USB_DT_ENDPOINT:
449 if (head->bLength != USB_DT_ENDPOINT_SIZE &&
450 head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
451 printf("ERROR: Invalid USB EP length (%d)\n",
455 if (index + head->bLength >
456 dev->config.desc.wTotalLength) {
457 puts("USB EP descriptor overflowed buffer!\n");
461 puts("Endpoint descriptor out of order!\n");
464 epno = dev->config.if_desc[ifno].no_of_ep;
465 if_desc = &dev->config.if_desc[ifno];
466 if (epno >= USB_MAXENDPOINTS) {
467 printf("Interface %d has too many endpoints!\n",
468 if_desc->desc.bInterfaceNumber);
471 /* found an endpoint */
473 memcpy(&if_desc->ep_desc[epno], head,
474 USB_DT_ENDPOINT_SIZE);
475 ep_wMaxPacketSize = get_unaligned(&dev->config.\
479 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
484 debug("if %d, ep %d\n", ifno, epno);
486 case USB_DT_SS_ENDPOINT_COMP:
487 if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
488 printf("ERROR: Invalid USB EPC length (%d)\n",
492 if (index + USB_DT_SS_EP_COMP_SIZE >
493 dev->config.desc.wTotalLength) {
494 puts("USB EPC descriptor overflowed buffer!\n");
497 if (ifno < 0 || epno < 0) {
498 puts("EPC descriptor out of order!\n");
501 if_desc = &dev->config.if_desc[ifno];
502 memcpy(&if_desc->ss_ep_comp_desc[epno], head,
503 USB_DT_SS_EP_COMP_SIZE);
506 if (head->bLength == 0)
509 debug("unknown Description Type : %x\n",
510 head->bDescriptorType);
514 unsigned char *ch = (unsigned char *)head;
517 for (i = 0; i < head->bLength; i++)
518 debug("%02X ", *ch++);
524 index += head->bLength;
525 head = (struct usb_descriptor_header *)&buffer[index];
530 /***********************************************************************
532 * endp: endpoint number in bits 0-3;
533 * direction flag in bit 7 (1 = IN, 0 = OUT)
535 int usb_clear_halt(struct usb_device *dev, int pipe)
538 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
540 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
541 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
542 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
544 /* don't clear if failed */
549 * NOTE: we do not get status and verify reset was successful
550 * as some devices are reported to lock up upon this check..
553 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
555 /* toggle is reset on clear */
556 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
561 /**********************************************************************
562 * get_descriptor type
564 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
565 unsigned char index, void *buf, int size)
567 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
568 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
569 (type << 8) + index, 0, buf, size,
573 /**********************************************************************
574 * gets len of configuration cfgno
576 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
579 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
580 struct usb_config_descriptor *config;
582 config = (struct usb_config_descriptor *)&buffer[0];
583 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
586 printf("unable to get descriptor, error %lX\n",
589 printf("config descriptor too short " \
590 "(expected %i, got %i)\n", 9, result);
593 return le16_to_cpu(config->wTotalLength);
596 /**********************************************************************
597 * gets configuration cfgno and store it in the buffer
599 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
600 unsigned char *buffer, int length)
603 struct usb_config_descriptor *config;
605 config = (struct usb_config_descriptor *)&buffer[0];
606 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
607 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
608 le16_to_cpu(config->wTotalLength));
609 config->wTotalLength = result; /* validated, with CPU byte order */
614 /********************************************************************
615 * set address of a device to the value in dev->devnum.
616 * This can only be done by addressing the device via the default address (0)
618 static int usb_set_address(struct usb_device *dev)
620 debug("set address %d\n", dev->devnum);
622 return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
623 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
626 /********************************************************************
627 * set interface number to interface
629 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
631 struct usb_interface *if_face = NULL;
634 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
635 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
636 if_face = &dev->config.if_desc[i];
641 printf("selecting invalid interface %d", interface);
645 * We should return now for devices with only one alternate setting.
646 * According to 9.4.10 of the Universal Serial Bus Specification
647 * Revision 2.0 such devices can return with a STALL. This results in
648 * some USB sticks timeouting during initialization and then being
649 * unusable in U-Boot.
651 if (if_face->num_altsetting == 1)
654 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
655 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
656 alternate, interface, NULL, 0,
657 USB_CNTL_TIMEOUT * 5);
664 /********************************************************************
665 * set configuration number to configuration
667 static int usb_set_configuration(struct usb_device *dev, int configuration)
670 debug("set configuration %d\n", configuration);
671 /* set setup command */
672 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
673 USB_REQ_SET_CONFIGURATION, 0,
675 NULL, 0, USB_CNTL_TIMEOUT);
684 /********************************************************************
685 * set protocol to protocol
687 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
689 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
690 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
691 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
694 /********************************************************************
697 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
699 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
700 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
701 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
704 /********************************************************************
707 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
708 unsigned char id, void *buf, int size)
710 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
712 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
713 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
716 /********************************************************************
717 * get class descriptor
719 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
720 unsigned char type, unsigned char id, void *buf, int size)
722 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
723 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
724 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
727 /********************************************************************
728 * get string index in buffer
730 static int usb_get_string(struct usb_device *dev, unsigned short langid,
731 unsigned char index, void *buf, int size)
736 for (i = 0; i < 3; ++i) {
737 /* some devices are flaky */
738 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
739 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
740 (USB_DT_STRING << 8) + index, langid, buf, size,
751 static void usb_try_string_workarounds(unsigned char *buf, int *length)
753 int newlength, oldlength = *length;
755 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
756 if (!isprint(buf[newlength]) || buf[newlength + 1])
766 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
767 unsigned int index, unsigned char *buf)
771 /* Try to read the string descriptor by asking for the maximum
772 * possible number of bytes */
773 rc = usb_get_string(dev, langid, index, buf, 255);
775 /* If that failed try to read the descriptor length, then
776 * ask for just that many bytes */
778 rc = usb_get_string(dev, langid, index, buf, 2);
780 rc = usb_get_string(dev, langid, index, buf, buf[0]);
784 if (!buf[0] && !buf[1])
785 usb_try_string_workarounds(buf, &rc);
787 /* There might be extra junk at the end of the descriptor */
791 rc = rc - (rc & 1); /* force a multiple of two */
801 /********************************************************************
803 * Get string index and translate it to ascii.
804 * returns string length (> 0) or error (< 0)
806 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
808 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
813 if (size <= 0 || !buf || !index)
818 /* get langid for strings if it's not yet known */
819 if (!dev->have_langid) {
820 err = usb_string_sub(dev, 0, 0, tbuf);
822 debug("error getting string descriptor 0 " \
823 "(error=%lx)\n", dev->status);
825 } else if (tbuf[0] < 4) {
826 debug("string descriptor 0 too short\n");
829 dev->have_langid = -1;
830 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
831 /* always use the first langid listed */
832 debug("USB device number %d default " \
833 "language ID 0x%x\n",
834 dev->devnum, dev->string_langid);
838 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
842 size--; /* leave room for trailing NULL char in output buffer */
843 for (idx = 0, u = 2; u < err; u += 2) {
846 if (tbuf[u+1]) /* high byte */
847 buf[idx++] = '?'; /* non-ASCII character */
849 buf[idx++] = tbuf[u];
857 /********************************************************************
858 * USB device handling:
859 * the USB device are static allocated [USB_MAX_DEVICE].
862 #if !CONFIG_IS_ENABLED(DM_USB)
864 /* returns a pointer to the device with the index [index].
865 * if the device is not assigned (dev->devnum==-1) returns NULL
867 struct usb_device *usb_get_dev_index(int index)
869 if (usb_dev[index].devnum == -1)
872 return &usb_dev[index];
875 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
878 debug("New Device %d\n", dev_index);
879 if (dev_index == USB_MAX_DEVICE) {
880 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
883 /* default Address is 0, real addresses start with 1 */
884 usb_dev[dev_index].devnum = dev_index + 1;
885 usb_dev[dev_index].maxchild = 0;
886 for (i = 0; i < USB_MAXCHILDREN; i++)
887 usb_dev[dev_index].children[i] = NULL;
888 usb_dev[dev_index].parent = NULL;
889 usb_dev[dev_index].controller = controller;
891 *devp = &usb_dev[dev_index - 1];
897 * Free the newly created device node.
898 * Called in error cases where configuring a newly attached
899 * device fails for some reason.
901 void usb_free_device(struct udevice *controller)
904 debug("Freeing device node: %d\n", dev_index);
905 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
906 usb_dev[dev_index].devnum = -1;
910 * XHCI issues Enable Slot command and thereafter
911 * allocates device contexts. Provide a weak alias
912 * function for the purpose, so that XHCI overrides it
913 * and EHCI/OHCI just work out of the box.
915 __weak int usb_alloc_device(struct usb_device *udev)
919 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
921 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
924 usb_reset_root_port(dev);
929 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
931 __maybe_unused struct usb_device_descriptor *desc;
932 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
935 desc = (struct usb_device_descriptor *)tmpbuf;
937 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
938 if (err < expect_len) {
940 printf("unable to get device descriptor (error=%d)\n",
944 printf("USB device descriptor short read (expected %i, got %i)\n",
949 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
954 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
957 * This is a Windows scheme of initialization sequence, with double
958 * reset of the device (Linux uses the same sequence)
959 * Some equipment is said to work only with such init sequence; this
960 * patch is based on the work by Alan Stern:
961 * http://sourceforge.net/mailarchive/forum.php?
962 * thread_id=5729457&forum_id=5398
966 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
967 * only 18 bytes long, this will terminate with a short packet. But if
968 * the maxpacket size is 8 or 16 the device may be waiting to transmit
969 * some more, or keeps on retransmitting the 8 byte header.
972 if (dev->speed == USB_SPEED_LOW) {
973 dev->descriptor.bMaxPacketSize0 = 8;
974 dev->maxpacketsize = PACKET_SIZE_8;
976 dev->descriptor.bMaxPacketSize0 = 64;
977 dev->maxpacketsize = PACKET_SIZE_64;
979 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
980 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
982 if (do_read && dev->speed == USB_SPEED_FULL) {
986 * Validate we've received only at least 8 bytes, not that
987 * we've received the entire descriptor. The reasoning is:
988 * - The code only uses fields in the first 8 bytes, so
989 * that's all we need to have fetched at this stage.
990 * - The smallest maxpacket size is 8 bytes. Before we know
991 * the actual maxpacket the device uses, the USB controller
992 * may only accept a single packet. Consequently we are only
993 * guaranteed to receive 1 packet (at least 8 bytes) even in
996 * At least the DWC2 controller needs to be programmed with
997 * the number of packets in addition to the number of bytes.
998 * A request for 64 bytes of data with the maxpacket guessed
999 * as 64 (above) yields a request for 1 packet.
1001 err = get_descriptor_len(dev, 64, 8);
1006 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
1007 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
1008 switch (dev->descriptor.bMaxPacketSize0) {
1010 dev->maxpacketsize = PACKET_SIZE_8;
1013 dev->maxpacketsize = PACKET_SIZE_16;
1016 dev->maxpacketsize = PACKET_SIZE_32;
1019 dev->maxpacketsize = PACKET_SIZE_64;
1022 printf("%s: invalid max packet size\n", __func__);
1029 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1030 struct usb_device *parent)
1035 * Allocate usb 3.0 device context.
1036 * USB 3.0 (xHCI) protocol tries to allocate device slot
1037 * and related data structures first. This call does that.
1038 * Refer to sec 4.3.2 in xHCI spec rev1.0
1040 err = usb_alloc_device(dev);
1042 printf("Cannot allocate device context to get SLOT_ID\n");
1045 err = usb_setup_descriptor(dev, do_read);
1048 err = usb_hub_port_reset(dev, parent);
1054 err = usb_set_address(dev); /* set address */
1057 printf("\n USB device not accepting new address " \
1058 "(error=%lX)\n", dev->status);
1062 mdelay(10); /* Let the SET_ADDRESS settle */
1065 * If we haven't read device descriptor before, read it here
1066 * after device is assigned an address. This is only applicable
1070 err = usb_setup_descriptor(dev, true);
1078 int usb_select_config(struct usb_device *dev)
1080 unsigned char *tmpbuf = NULL;
1083 err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1087 /* correct le values */
1088 le16_to_cpus(&dev->descriptor.bcdUSB);
1089 le16_to_cpus(&dev->descriptor.idVendor);
1090 le16_to_cpus(&dev->descriptor.idProduct);
1091 le16_to_cpus(&dev->descriptor.bcdDevice);
1094 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1095 * about this first Get Descriptor request. If there are any other
1096 * requests in the first microframe, the stick crashes. Wait about
1097 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1101 /* only support for one config for now */
1102 err = usb_get_configuration_len(dev, 0);
1104 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1108 err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1111 printf("usb_new_device: Cannot read configuration, " \
1112 "skipping device %04x:%04x\n",
1113 dev->descriptor.idVendor, dev->descriptor.idProduct);
1117 usb_parse_config(dev, tmpbuf, 0);
1119 usb_set_maxpacket(dev);
1121 * we set the default configuration here
1122 * This seems premature. If the driver wants a different configuration
1123 * it will need to select itself.
1125 err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1127 printf("failed to set default configuration " \
1128 "len %d, status %lX\n", dev->act_len, dev->status);
1133 * Wait until the Set Configuration request gets processed by the
1134 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1135 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1139 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1140 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1141 dev->descriptor.iSerialNumber);
1142 memset(dev->mf, 0, sizeof(dev->mf));
1143 memset(dev->prod, 0, sizeof(dev->prod));
1144 memset(dev->serial, 0, sizeof(dev->serial));
1145 if (dev->descriptor.iManufacturer)
1146 usb_string(dev, dev->descriptor.iManufacturer,
1147 dev->mf, sizeof(dev->mf));
1148 if (dev->descriptor.iProduct)
1149 usb_string(dev, dev->descriptor.iProduct,
1150 dev->prod, sizeof(dev->prod));
1151 if (dev->descriptor.iSerialNumber)
1152 usb_string(dev, dev->descriptor.iSerialNumber,
1153 dev->serial, sizeof(dev->serial));
1154 debug("Manufacturer %s\n", dev->mf);
1155 debug("Product %s\n", dev->prod);
1156 debug("SerialNumber %s\n", dev->serial);
1161 int usb_setup_device(struct usb_device *dev, bool do_read,
1162 struct usb_device *parent)
1167 /* We still haven't set the Address yet */
1171 ret = usb_prepare_device(dev, addr, do_read, parent);
1174 ret = usb_select_config(dev);
1179 #if !CONFIG_IS_ENABLED(DM_USB)
1181 * By the time we get here, the device has gotten a new device ID
1182 * and is in the default state. We need to identify the thing and
1183 * get the ball rolling..
1185 * Returns 0 for success, != 0 for error.
1187 int usb_new_device(struct usb_device *dev)
1189 bool do_read = true;
1193 * XHCI needs to issue a Address device command to setup
1194 * proper device context structures, before it can interact
1195 * with the device. So a get_descriptor will fail before any
1196 * of that is done for XHCI unlike EHCI.
1198 #ifdef CONFIG_USB_XHCI_HCD
1201 err = usb_setup_device(dev, do_read, dev->parent);
1205 /* Now probe if the device is a hub */
1206 err = usb_hub_probe(dev, 0);
1215 int board_usb_init(int index, enum usb_init_type init)
1221 int board_usb_cleanup(int index, enum usb_init_type init)
1226 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1228 #if CONFIG_IS_ENABLED(DM_USB)
1231 return parent->children[port] != NULL;
1235 #if CONFIG_IS_ENABLED(DM_USB)
1236 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1237 uint8_t *hub_address, uint8_t *hub_port)
1239 struct udevice *parent;
1240 struct usb_device *uparent, *ttdev;
1243 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1244 * to the parent udevice, not the actual udevice belonging to the
1245 * udev as the device is not instantiated yet. So when searching
1246 * for the first usb-2 parent start with udev->dev not
1247 * udev->dev->parent .
1251 uparent = dev_get_parent_priv(parent);
1253 while (uparent->speed != USB_SPEED_HIGH) {
1254 struct udevice *dev = parent;
1256 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1257 printf("Error: Cannot find high speed parent of usb-1 device\n");
1263 ttdev = dev_get_parent_priv(dev);
1264 parent = dev->parent;
1265 uparent = dev_get_parent_priv(parent);
1267 *hub_address = uparent->devnum;
1268 *hub_port = ttdev->portnr;
1271 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1272 uint8_t *hub_address, uint8_t *hub_port)
1274 /* Find out the nearest parent which is high speed */
1275 while (udev->parent->parent != NULL)
1276 if (udev->parent->speed != USB_SPEED_HIGH) {
1277 udev = udev->parent;
1279 *hub_address = udev->parent->devnum;
1280 *hub_port = udev->portnr;
1284 printf("Error: Cannot find high speed parent of usb-1 device\n");