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.
32 #include <asm/processor.h>
33 #include <linux/compiler.h>
34 #include <linux/ctype.h>
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
40 #define USB_BUFSIZ 512
42 static int asynch_allowed;
43 char usb_started; /* flag for the started/stopped USB status */
45 #if !CONFIG_IS_ENABLED(DM_USB)
46 static struct usb_device usb_dev[USB_MAX_DEVICE];
49 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
50 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
53 /***************************************************************************
59 struct usb_device *dev;
60 int i, start_index = 0;
61 int controllers_initialized = 0;
68 /* first make all devices unknown */
69 for (i = 0; i < USB_MAX_DEVICE; i++) {
70 memset(&usb_dev[i], 0, sizeof(struct usb_device));
71 usb_dev[i].devnum = -1;
74 /* init low_level USB */
75 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
76 /* init low_level USB */
78 ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl);
79 if (ret == -ENODEV) { /* No such device. */
80 puts("Port not available.\n");
81 controllers_initialized++;
85 if (ret) { /* Other error. */
86 puts("lowlevel init failed\n");
90 * lowlevel init is OK, now scan the bus for devices
91 * i.e. search HUBs and configure them
93 controllers_initialized++;
94 start_index = dev_index;
95 printf("scanning bus %d for devices... ", i);
96 ret = usb_alloc_new_device(ctrl, &dev);
101 * device 0 is always present
102 * (root hub, so let it analyze)
104 ret = usb_new_device(dev);
106 usb_free_device(dev->controller);
108 if (start_index == dev_index) {
109 puts("No USB Device found\n");
112 printf("%d USB Device(s) found\n",
113 dev_index - start_index);
120 /* if we were not able to find at least one working bus, bail out */
121 if (controllers_initialized == 0)
122 puts("USB error: all controllers failed lowlevel init\n");
124 return usb_started ? 0 : -ENODEV;
127 /******************************************************************************
128 * Stop USB this stops the LowLevel Part and deregisters USB devices.
139 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
140 if (usb_lowlevel_stop(i))
141 printf("failed to stop USB controller %d\n", i);
148 /******************************************************************************
149 * Detect if a USB device has been plugged or unplugged.
151 int usb_detect_change(void)
156 for (j = 0; j < USB_MAX_DEVICE; j++) {
157 for (i = 0; i < usb_dev[j].maxchild; i++) {
158 struct usb_port_status status;
160 if (usb_get_port_status(&usb_dev[j], i + 1,
162 /* USB request failed */
165 if (le16_to_cpu(status.wPortChange) &
166 USB_PORT_STAT_C_CONNECTION)
175 * disables the asynch behaviour of the control message. This is used for data
176 * transfers that uses the exclusiv access to the control and bulk messages.
177 * Returns the old value so it can be restored later.
179 int usb_disable_asynch(int disable)
181 int old_value = asynch_allowed;
183 asynch_allowed = !disable;
186 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
189 /*-------------------------------------------------------------------
195 * submits an Interrupt Message
197 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
198 void *buffer, int transfer_len, int interval)
200 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
204 * submits a control message and waits for comletion (at least timeout * 1ms)
205 * If timeout is 0, we don't wait for completion (used as example to set and
206 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
207 * allow control messages with 0 timeout, by previousely resetting the flag
208 * asynch_allowed (usb_disable_asynch(1)).
209 * returns the transferred length if OK or -1 if error. The transferred length
210 * and the current status are stored in the dev->act_len and dev->status.
212 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
213 unsigned char request, unsigned char requesttype,
214 unsigned short value, unsigned short index,
215 void *data, unsigned short size, int timeout)
217 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
220 if ((timeout == 0) && (!asynch_allowed)) {
221 /* request for a asynch control pipe is not allowed */
225 /* set setup command */
226 setup_packet->requesttype = requesttype;
227 setup_packet->request = request;
228 setup_packet->value = cpu_to_le16(value);
229 setup_packet->index = cpu_to_le16(index);
230 setup_packet->length = cpu_to_le16(size);
231 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
232 "value 0x%X index 0x%X length 0x%X\n",
233 request, requesttype, value, index, size);
234 dev->status = USB_ST_NOT_PROC; /*not yet processed */
236 err = submit_control_msg(dev, pipe, data, size, setup_packet);
243 * Wait for status to update until timeout expires, USB driver
244 * interrupt handler may set the status when the USB operation has
248 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
259 /*-------------------------------------------------------------------
260 * submits bulk message, and waits for completion. returns 0 if Ok or
262 * synchronous behavior
264 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
265 void *data, int len, int *actual_length, int timeout)
269 dev->status = USB_ST_NOT_PROC; /*not yet processed */
270 if (submit_bulk_msg(dev, pipe, data, len) < 0)
273 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
277 *actual_length = dev->act_len;
278 if (dev->status == 0)
285 /*-------------------------------------------------------------------
290 * returns the max packet size, depending on the pipe direction and
291 * the configurations values
293 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
295 /* direction is out -> use emaxpacket out */
296 if ((pipe & USB_DIR_IN) == 0)
297 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
299 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
303 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
304 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
305 * when it is inlined in 1 single routine. What happens is that the register r3
306 * is used as loop-count 'i', but gets overwritten later on.
307 * This is clearly a compiler bug, but it is easier to workaround it here than
308 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
309 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
311 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
314 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
317 struct usb_endpoint_descriptor *ep;
318 u16 ep_wMaxPacketSize;
320 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
322 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
323 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
325 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
326 USB_ENDPOINT_XFER_CONTROL) {
327 /* Control => bidirectional */
328 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
329 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
330 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
331 b, dev->epmaxpacketin[b]);
333 if ((ep->bEndpointAddress & 0x80) == 0) {
335 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
336 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
337 debug("##EP epmaxpacketout[%d] = %d\n",
338 b, dev->epmaxpacketout[b]);
342 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
343 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
344 debug("##EP epmaxpacketin[%d] = %d\n",
345 b, dev->epmaxpacketin[b]);
352 * set the max packed value of all endpoints in the given configuration
354 static int usb_set_maxpacket(struct usb_device *dev)
358 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
359 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
360 usb_set_maxpacket_ep(dev, i, ii);
365 /*******************************************************************************
366 * Parse the config, located in buffer, and fills the dev->config structure.
367 * Note that all little/big endian swapping are done automatically.
368 * (wTotalLength has already been swapped and sanitized when it was read.)
370 static int usb_parse_config(struct usb_device *dev,
371 unsigned char *buffer, int cfgno)
373 struct usb_descriptor_header *head;
374 int index, ifno, epno, curr_if_num;
375 u16 ep_wMaxPacketSize;
376 struct usb_interface *if_desc = NULL;
382 dev->configno = cfgno;
383 head = (struct usb_descriptor_header *) &buffer[0];
384 if (head->bDescriptorType != USB_DT_CONFIG) {
385 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
386 head->bDescriptorType);
389 if (head->bLength != USB_DT_CONFIG_SIZE) {
390 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
393 memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
394 dev->config.no_of_if = 0;
396 index = dev->config.desc.bLength;
397 /* Ok the first entry must be a configuration entry,
398 * now process the others */
399 head = (struct usb_descriptor_header *) &buffer[index];
400 while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
401 switch (head->bDescriptorType) {
402 case USB_DT_INTERFACE:
403 if (head->bLength != USB_DT_INTERFACE_SIZE) {
404 printf("ERROR: Invalid USB IF length (%d)\n",
408 if (index + USB_DT_INTERFACE_SIZE >
409 dev->config.desc.wTotalLength) {
410 puts("USB IF descriptor overflowed buffer!\n");
413 if (((struct usb_interface_descriptor *) \
414 head)->bInterfaceNumber != curr_if_num) {
415 /* this is a new interface, copy new desc */
416 ifno = dev->config.no_of_if;
417 if (ifno >= USB_MAXINTERFACES) {
418 puts("Too many USB interfaces!\n");
419 /* try to go on with what we have */
422 if_desc = &dev->config.if_desc[ifno];
423 dev->config.no_of_if++;
424 memcpy(if_desc, head,
425 USB_DT_INTERFACE_SIZE);
426 if_desc->no_of_ep = 0;
427 if_desc->num_altsetting = 1;
429 if_desc->desc.bInterfaceNumber;
431 /* found alternate setting for the interface */
433 if_desc = &dev->config.if_desc[ifno];
434 if_desc->num_altsetting++;
438 case USB_DT_ENDPOINT:
439 if (head->bLength != USB_DT_ENDPOINT_SIZE &&
440 head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
441 printf("ERROR: Invalid USB EP length (%d)\n",
445 if (index + head->bLength >
446 dev->config.desc.wTotalLength) {
447 puts("USB EP descriptor overflowed buffer!\n");
451 puts("Endpoint descriptor out of order!\n");
454 epno = dev->config.if_desc[ifno].no_of_ep;
455 if_desc = &dev->config.if_desc[ifno];
456 if (epno >= USB_MAXENDPOINTS) {
457 printf("Interface %d has too many endpoints!\n",
458 if_desc->desc.bInterfaceNumber);
461 /* found an endpoint */
463 memcpy(&if_desc->ep_desc[epno], head,
464 USB_DT_ENDPOINT_SIZE);
465 ep_wMaxPacketSize = get_unaligned(&dev->config.\
469 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
474 debug("if %d, ep %d\n", ifno, epno);
476 case USB_DT_SS_ENDPOINT_COMP:
477 if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
478 printf("ERROR: Invalid USB EPC length (%d)\n",
482 if (index + USB_DT_SS_EP_COMP_SIZE >
483 dev->config.desc.wTotalLength) {
484 puts("USB EPC descriptor overflowed buffer!\n");
487 if (ifno < 0 || epno < 0) {
488 puts("EPC descriptor out of order!\n");
491 if_desc = &dev->config.if_desc[ifno];
492 memcpy(&if_desc->ss_ep_comp_desc[epno], head,
493 USB_DT_SS_EP_COMP_SIZE);
496 if (head->bLength == 0)
499 debug("unknown Description Type : %x\n",
500 head->bDescriptorType);
504 unsigned char *ch = (unsigned char *)head;
507 for (i = 0; i < head->bLength; i++)
508 debug("%02X ", *ch++);
514 index += head->bLength;
515 head = (struct usb_descriptor_header *)&buffer[index];
520 /***********************************************************************
522 * endp: endpoint number in bits 0-3;
523 * direction flag in bit 7 (1 = IN, 0 = OUT)
525 int usb_clear_halt(struct usb_device *dev, int pipe)
528 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
530 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
531 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
532 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
534 /* don't clear if failed */
539 * NOTE: we do not get status and verify reset was successful
540 * as some devices are reported to lock up upon this check..
543 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
545 /* toggle is reset on clear */
546 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
551 /**********************************************************************
552 * get_descriptor type
554 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
555 unsigned char index, void *buf, int size)
557 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
558 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
559 (type << 8) + index, 0, buf, size,
563 /**********************************************************************
564 * gets len of configuration cfgno
566 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
569 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
570 struct usb_config_descriptor *config;
572 config = (struct usb_config_descriptor *)&buffer[0];
573 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
576 printf("unable to get descriptor, error %lX\n",
579 printf("config descriptor too short " \
580 "(expected %i, got %i)\n", 9, result);
583 return le16_to_cpu(config->wTotalLength);
586 /**********************************************************************
587 * gets configuration cfgno and store it in the buffer
589 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
590 unsigned char *buffer, int length)
593 struct usb_config_descriptor *config;
595 config = (struct usb_config_descriptor *)&buffer[0];
596 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
597 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
598 le16_to_cpu(config->wTotalLength));
599 config->wTotalLength = result; /* validated, with CPU byte order */
604 /********************************************************************
605 * set address of a device to the value in dev->devnum.
606 * This can only be done by addressing the device via the default address (0)
608 static int usb_set_address(struct usb_device *dev)
610 debug("set address %d\n", dev->devnum);
612 return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
613 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
616 /********************************************************************
617 * set interface number to interface
619 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
621 struct usb_interface *if_face = NULL;
624 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
625 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
626 if_face = &dev->config.if_desc[i];
631 printf("selecting invalid interface %d", interface);
635 * We should return now for devices with only one alternate setting.
636 * According to 9.4.10 of the Universal Serial Bus Specification
637 * Revision 2.0 such devices can return with a STALL. This results in
638 * some USB sticks timeouting during initialization and then being
639 * unusable in U-Boot.
641 if (if_face->num_altsetting == 1)
644 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
645 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
646 alternate, interface, NULL, 0,
647 USB_CNTL_TIMEOUT * 5);
654 /********************************************************************
655 * set configuration number to configuration
657 static int usb_set_configuration(struct usb_device *dev, int configuration)
660 debug("set configuration %d\n", configuration);
661 /* set setup command */
662 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
663 USB_REQ_SET_CONFIGURATION, 0,
665 NULL, 0, USB_CNTL_TIMEOUT);
674 /********************************************************************
675 * set protocol to protocol
677 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
679 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
680 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
681 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
684 /********************************************************************
687 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
689 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
690 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
691 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
694 /********************************************************************
697 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
698 unsigned char id, void *buf, int size)
700 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
702 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
703 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
706 /********************************************************************
707 * get class descriptor
709 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
710 unsigned char type, unsigned char id, void *buf, int size)
712 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
713 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
714 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
717 /********************************************************************
718 * get string index in buffer
720 static int usb_get_string(struct usb_device *dev, unsigned short langid,
721 unsigned char index, void *buf, int size)
726 for (i = 0; i < 3; ++i) {
727 /* some devices are flaky */
728 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
729 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
730 (USB_DT_STRING << 8) + index, langid, buf, size,
741 static void usb_try_string_workarounds(unsigned char *buf, int *length)
743 int newlength, oldlength = *length;
745 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
746 if (!isprint(buf[newlength]) || buf[newlength + 1])
756 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
757 unsigned int index, unsigned char *buf)
761 /* Try to read the string descriptor by asking for the maximum
762 * possible number of bytes */
763 rc = usb_get_string(dev, langid, index, buf, 255);
765 /* If that failed try to read the descriptor length, then
766 * ask for just that many bytes */
768 rc = usb_get_string(dev, langid, index, buf, 2);
770 rc = usb_get_string(dev, langid, index, buf, buf[0]);
774 if (!buf[0] && !buf[1])
775 usb_try_string_workarounds(buf, &rc);
777 /* There might be extra junk at the end of the descriptor */
781 rc = rc - (rc & 1); /* force a multiple of two */
791 /********************************************************************
793 * Get string index and translate it to ascii.
794 * returns string length (> 0) or error (< 0)
796 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
798 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
803 if (size <= 0 || !buf || !index)
808 /* get langid for strings if it's not yet known */
809 if (!dev->have_langid) {
810 err = usb_string_sub(dev, 0, 0, tbuf);
812 debug("error getting string descriptor 0 " \
813 "(error=%lx)\n", dev->status);
815 } else if (tbuf[0] < 4) {
816 debug("string descriptor 0 too short\n");
819 dev->have_langid = -1;
820 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
821 /* always use the first langid listed */
822 debug("USB device number %d default " \
823 "language ID 0x%x\n",
824 dev->devnum, dev->string_langid);
828 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
832 size--; /* leave room for trailing NULL char in output buffer */
833 for (idx = 0, u = 2; u < err; u += 2) {
836 if (tbuf[u+1]) /* high byte */
837 buf[idx++] = '?'; /* non-ASCII character */
839 buf[idx++] = tbuf[u];
847 /********************************************************************
848 * USB device handling:
849 * the USB device are static allocated [USB_MAX_DEVICE].
852 #if !CONFIG_IS_ENABLED(DM_USB)
854 /* returns a pointer to the device with the index [index].
855 * if the device is not assigned (dev->devnum==-1) returns NULL
857 struct usb_device *usb_get_dev_index(int index)
859 if (usb_dev[index].devnum == -1)
862 return &usb_dev[index];
865 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
868 debug("New Device %d\n", dev_index);
869 if (dev_index == USB_MAX_DEVICE) {
870 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
873 /* default Address is 0, real addresses start with 1 */
874 usb_dev[dev_index].devnum = dev_index + 1;
875 usb_dev[dev_index].maxchild = 0;
876 for (i = 0; i < USB_MAXCHILDREN; i++)
877 usb_dev[dev_index].children[i] = NULL;
878 usb_dev[dev_index].parent = NULL;
879 usb_dev[dev_index].controller = controller;
881 *devp = &usb_dev[dev_index - 1];
887 * Free the newly created device node.
888 * Called in error cases where configuring a newly attached
889 * device fails for some reason.
891 void usb_free_device(struct udevice *controller)
894 debug("Freeing device node: %d\n", dev_index);
895 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
896 usb_dev[dev_index].devnum = -1;
900 * XHCI issues Enable Slot command and thereafter
901 * allocates device contexts. Provide a weak alias
902 * function for the purpose, so that XHCI overrides it
903 * and EHCI/OHCI just work out of the box.
905 __weak int usb_alloc_device(struct usb_device *udev)
909 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
911 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
914 usb_reset_root_port(dev);
919 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
921 __maybe_unused struct usb_device_descriptor *desc;
922 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
925 desc = (struct usb_device_descriptor *)tmpbuf;
927 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
928 if (err < expect_len) {
930 printf("unable to get device descriptor (error=%d)\n",
934 printf("USB device descriptor short read (expected %i, got %i)\n",
939 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
944 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
947 * This is a Windows scheme of initialization sequence, with double
948 * reset of the device (Linux uses the same sequence)
949 * Some equipment is said to work only with such init sequence; this
950 * patch is based on the work by Alan Stern:
951 * http://sourceforge.net/mailarchive/forum.php?
952 * thread_id=5729457&forum_id=5398
956 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
957 * only 18 bytes long, this will terminate with a short packet. But if
958 * the maxpacket size is 8 or 16 the device may be waiting to transmit
959 * some more, or keeps on retransmitting the 8 byte header.
962 if (dev->speed == USB_SPEED_LOW) {
963 dev->descriptor.bMaxPacketSize0 = 8;
964 dev->maxpacketsize = PACKET_SIZE_8;
966 dev->descriptor.bMaxPacketSize0 = 64;
967 dev->maxpacketsize = PACKET_SIZE_64;
969 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
970 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
972 if (do_read && dev->speed == USB_SPEED_FULL) {
976 * Validate we've received only at least 8 bytes, not that
977 * we've received the entire descriptor. The reasoning is:
978 * - The code only uses fields in the first 8 bytes, so
979 * that's all we need to have fetched at this stage.
980 * - The smallest maxpacket size is 8 bytes. Before we know
981 * the actual maxpacket the device uses, the USB controller
982 * may only accept a single packet. Consequently we are only
983 * guaranteed to receive 1 packet (at least 8 bytes) even in
986 * At least the DWC2 controller needs to be programmed with
987 * the number of packets in addition to the number of bytes.
988 * A request for 64 bytes of data with the maxpacket guessed
989 * as 64 (above) yields a request for 1 packet.
991 err = get_descriptor_len(dev, 64, 8);
996 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
997 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
998 switch (dev->descriptor.bMaxPacketSize0) {
1000 dev->maxpacketsize = PACKET_SIZE_8;
1003 dev->maxpacketsize = PACKET_SIZE_16;
1006 dev->maxpacketsize = PACKET_SIZE_32;
1009 dev->maxpacketsize = PACKET_SIZE_64;
1012 printf("%s: invalid max packet size\n", __func__);
1019 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1020 struct usb_device *parent)
1025 * Allocate usb 3.0 device context.
1026 * USB 3.0 (xHCI) protocol tries to allocate device slot
1027 * and related data structures first. This call does that.
1028 * Refer to sec 4.3.2 in xHCI spec rev1.0
1030 err = usb_alloc_device(dev);
1032 printf("Cannot allocate device context to get SLOT_ID\n");
1035 err = usb_setup_descriptor(dev, do_read);
1038 err = usb_hub_port_reset(dev, parent);
1044 err = usb_set_address(dev); /* set address */
1047 printf("\n USB device not accepting new address " \
1048 "(error=%lX)\n", dev->status);
1052 mdelay(10); /* Let the SET_ADDRESS settle */
1055 * If we haven't read device descriptor before, read it here
1056 * after device is assigned an address. This is only applicable
1060 err = usb_setup_descriptor(dev, true);
1068 int usb_select_config(struct usb_device *dev)
1070 unsigned char *tmpbuf = NULL;
1073 err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1077 /* correct le values */
1078 le16_to_cpus(&dev->descriptor.bcdUSB);
1079 le16_to_cpus(&dev->descriptor.idVendor);
1080 le16_to_cpus(&dev->descriptor.idProduct);
1081 le16_to_cpus(&dev->descriptor.bcdDevice);
1084 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1085 * about this first Get Descriptor request. If there are any other
1086 * requests in the first microframe, the stick crashes. Wait about
1087 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1091 /* only support for one config for now */
1092 err = usb_get_configuration_len(dev, 0);
1094 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1098 err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1101 printf("usb_new_device: Cannot read configuration, " \
1102 "skipping device %04x:%04x\n",
1103 dev->descriptor.idVendor, dev->descriptor.idProduct);
1107 usb_parse_config(dev, tmpbuf, 0);
1109 usb_set_maxpacket(dev);
1111 * we set the default configuration here
1112 * This seems premature. If the driver wants a different configuration
1113 * it will need to select itself.
1115 err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1117 printf("failed to set default configuration " \
1118 "len %d, status %lX\n", dev->act_len, dev->status);
1123 * Wait until the Set Configuration request gets processed by the
1124 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1125 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1129 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1130 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1131 dev->descriptor.iSerialNumber);
1132 memset(dev->mf, 0, sizeof(dev->mf));
1133 memset(dev->prod, 0, sizeof(dev->prod));
1134 memset(dev->serial, 0, sizeof(dev->serial));
1135 if (dev->descriptor.iManufacturer)
1136 usb_string(dev, dev->descriptor.iManufacturer,
1137 dev->mf, sizeof(dev->mf));
1138 if (dev->descriptor.iProduct)
1139 usb_string(dev, dev->descriptor.iProduct,
1140 dev->prod, sizeof(dev->prod));
1141 if (dev->descriptor.iSerialNumber)
1142 usb_string(dev, dev->descriptor.iSerialNumber,
1143 dev->serial, sizeof(dev->serial));
1144 debug("Manufacturer %s\n", dev->mf);
1145 debug("Product %s\n", dev->prod);
1146 debug("SerialNumber %s\n", dev->serial);
1151 int usb_setup_device(struct usb_device *dev, bool do_read,
1152 struct usb_device *parent)
1157 /* We still haven't set the Address yet */
1161 ret = usb_prepare_device(dev, addr, do_read, parent);
1164 ret = usb_select_config(dev);
1169 #if !CONFIG_IS_ENABLED(DM_USB)
1171 * By the time we get here, the device has gotten a new device ID
1172 * and is in the default state. We need to identify the thing and
1173 * get the ball rolling..
1175 * Returns 0 for success, != 0 for error.
1177 int usb_new_device(struct usb_device *dev)
1179 bool do_read = true;
1183 * XHCI needs to issue a Address device command to setup
1184 * proper device context structures, before it can interact
1185 * with the device. So a get_descriptor will fail before any
1186 * of that is done for XHCI unlike EHCI.
1188 #ifdef CONFIG_USB_XHCI_HCD
1191 err = usb_setup_device(dev, do_read, dev->parent);
1195 /* Now probe if the device is a hub */
1196 err = usb_hub_probe(dev, 0);
1205 int board_usb_init(int index, enum usb_init_type init)
1211 int board_usb_cleanup(int index, enum usb_init_type init)
1216 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1218 #if CONFIG_IS_ENABLED(DM_USB)
1221 return parent->children[port] != NULL;
1225 #if CONFIG_IS_ENABLED(DM_USB)
1226 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1227 uint8_t *hub_address, uint8_t *hub_port)
1229 struct udevice *parent;
1230 struct usb_device *uparent, *ttdev;
1233 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1234 * to the parent udevice, not the actual udevice belonging to the
1235 * udev as the device is not instantiated yet. So when searching
1236 * for the first usb-2 parent start with udev->dev not
1237 * udev->dev->parent .
1241 uparent = dev_get_parent_priv(parent);
1243 while (uparent->speed != USB_SPEED_HIGH) {
1244 struct udevice *dev = parent;
1246 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1247 printf("Error: Cannot find high speed parent of usb-1 device\n");
1253 ttdev = dev_get_parent_priv(dev);
1254 parent = dev->parent;
1255 uparent = dev_get_parent_priv(parent);
1257 *hub_address = uparent->devnum;
1258 *hub_port = ttdev->portnr;
1261 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1262 uint8_t *hub_address, uint8_t *hub_port)
1264 /* Find out the nearest parent which is high speed */
1265 while (udev->parent->parent != NULL)
1266 if (udev->parent->speed != USB_SPEED_HIGH) {
1267 udev = udev->parent;
1269 *hub_address = udev->parent->devnum;
1270 *hub_port = udev->portnr;
1274 printf("Error: Cannot find high speed parent of usb-1 device\n");