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.
31 #include <dm/device_compat.h>
35 #include <asm/processor.h>
36 #include <linux/compiler.h>
37 #include <linux/ctype.h>
38 #include <asm/byteorder.h>
39 #include <asm/unaligned.h>
42 #include <linux/delay.h>
44 #define USB_BUFSIZ 512
46 static int asynch_allowed;
47 bool usb_started; /* flag for the started/stopped USB status */
49 #if !CONFIG_IS_ENABLED(DM_USB)
50 static struct usb_device usb_dev[USB_MAX_DEVICE];
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)
174 /* Lock or unlock async schedule on the controller */
175 __weak int usb_lock_async(struct usb_device *dev, int lock)
181 * disables the asynch behaviour of the control message. This is used for data
182 * transfers that uses the exclusiv access to the control and bulk messages.
183 * Returns the old value so it can be restored later.
185 int usb_disable_asynch(int disable)
187 int old_value = asynch_allowed;
189 asynch_allowed = !disable;
192 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
195 /*-------------------------------------------------------------------
201 * submits an Interrupt Message. Some drivers may implement non-blocking
202 * polling: when non-block is true and the device is not responding return
203 * -EAGAIN instead of waiting for device to respond.
205 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
206 void *buffer, int transfer_len, int interval, bool nonblock)
208 return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
213 * submits a control message and waits for comletion (at least timeout * 1ms)
214 * If timeout is 0, we don't wait for completion (used as example to set and
215 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
216 * allow control messages with 0 timeout, by previousely resetting the flag
217 * asynch_allowed (usb_disable_asynch(1)).
218 * returns the transferred length if OK or -1 if error. The transferred length
219 * and the current status are stored in the dev->act_len and dev->status.
221 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
222 unsigned char request, unsigned char requesttype,
223 unsigned short value, unsigned short index,
224 void *data, unsigned short size, int timeout)
226 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
229 if ((timeout == 0) && (!asynch_allowed)) {
230 /* request for a asynch control pipe is not allowed */
234 /* set setup command */
235 setup_packet->requesttype = requesttype;
236 setup_packet->request = request;
237 setup_packet->value = cpu_to_le16(value);
238 setup_packet->index = cpu_to_le16(index);
239 setup_packet->length = cpu_to_le16(size);
240 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
241 "value 0x%X index 0x%X length 0x%X\n",
242 request, requesttype, value, index, size);
243 dev->status = USB_ST_NOT_PROC; /*not yet processed */
245 err = submit_control_msg(dev, pipe, data, size, setup_packet);
252 * Wait for status to update until timeout expires, USB driver
253 * interrupt handler may set the status when the USB operation has
257 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
268 /*-------------------------------------------------------------------
269 * submits bulk message, and waits for completion. returns 0 if Ok or
271 * synchronous behavior
273 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
274 void *data, int len, int *actual_length, int timeout)
278 dev->status = USB_ST_NOT_PROC; /*not yet processed */
279 if (submit_bulk_msg(dev, pipe, data, len) < 0)
282 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
286 *actual_length = dev->act_len;
287 if (dev->status == 0)
294 /*-------------------------------------------------------------------
299 * returns the max packet size, depending on the pipe direction and
300 * the configurations values
302 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
304 /* direction is out -> use emaxpacket out */
305 if ((pipe & USB_DIR_IN) == 0)
306 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
308 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
312 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
313 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
314 * when it is inlined in 1 single routine. What happens is that the register r3
315 * is used as loop-count 'i', but gets overwritten later on.
316 * This is clearly a compiler bug, but it is easier to workaround it here than
317 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
318 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
320 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
323 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
326 struct usb_endpoint_descriptor *ep;
327 u16 ep_wMaxPacketSize;
329 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
331 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
332 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
334 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
335 USB_ENDPOINT_XFER_CONTROL) {
336 /* Control => bidirectional */
337 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
338 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
339 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
340 b, dev->epmaxpacketin[b]);
342 if ((ep->bEndpointAddress & 0x80) == 0) {
344 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
345 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
346 debug("##EP epmaxpacketout[%d] = %d\n",
347 b, dev->epmaxpacketout[b]);
351 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
352 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
353 debug("##EP epmaxpacketin[%d] = %d\n",
354 b, dev->epmaxpacketin[b]);
361 * set the max packed value of all endpoints in the given configuration
363 static int usb_set_maxpacket(struct usb_device *dev)
367 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
368 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
369 usb_set_maxpacket_ep(dev, i, ii);
374 /*******************************************************************************
375 * Parse the config, located in buffer, and fills the dev->config structure.
376 * Note that all little/big endian swapping are done automatically.
377 * (wTotalLength has already been swapped and sanitized when it was read.)
379 static int usb_parse_config(struct usb_device *dev,
380 unsigned char *buffer, int cfgno)
382 struct usb_descriptor_header *head;
383 int index, ifno, epno, curr_if_num;
384 u16 ep_wMaxPacketSize;
385 struct usb_interface *if_desc = NULL;
391 dev->configno = cfgno;
392 head = (struct usb_descriptor_header *) &buffer[0];
393 if (head->bDescriptorType != USB_DT_CONFIG) {
394 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
395 head->bDescriptorType);
398 if (head->bLength != USB_DT_CONFIG_SIZE) {
399 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
402 memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
403 dev->config.no_of_if = 0;
405 index = dev->config.desc.bLength;
406 /* Ok the first entry must be a configuration entry,
407 * now process the others */
408 head = (struct usb_descriptor_header *) &buffer[index];
409 while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
410 switch (head->bDescriptorType) {
411 case USB_DT_INTERFACE:
412 if (head->bLength != USB_DT_INTERFACE_SIZE) {
413 printf("ERROR: Invalid USB IF length (%d)\n",
417 if (index + USB_DT_INTERFACE_SIZE >
418 dev->config.desc.wTotalLength) {
419 puts("USB IF descriptor overflowed buffer!\n");
422 if (((struct usb_interface_descriptor *) \
423 head)->bInterfaceNumber != curr_if_num) {
424 /* this is a new interface, copy new desc */
425 ifno = dev->config.no_of_if;
426 if (ifno >= USB_MAXINTERFACES) {
427 puts("Too many USB interfaces!\n");
428 /* try to go on with what we have */
431 if_desc = &dev->config.if_desc[ifno];
432 dev->config.no_of_if++;
433 memcpy(if_desc, head,
434 USB_DT_INTERFACE_SIZE);
435 if_desc->no_of_ep = 0;
436 if_desc->num_altsetting = 1;
438 if_desc->desc.bInterfaceNumber;
440 /* found alternate setting for the interface */
442 if_desc = &dev->config.if_desc[ifno];
443 if_desc->num_altsetting++;
447 case USB_DT_ENDPOINT:
448 if (head->bLength != USB_DT_ENDPOINT_SIZE &&
449 head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
450 printf("ERROR: Invalid USB EP length (%d)\n",
454 if (index + head->bLength >
455 dev->config.desc.wTotalLength) {
456 puts("USB EP descriptor overflowed buffer!\n");
460 puts("Endpoint descriptor out of order!\n");
463 epno = dev->config.if_desc[ifno].no_of_ep;
464 if_desc = &dev->config.if_desc[ifno];
465 if (epno >= USB_MAXENDPOINTS) {
466 printf("Interface %d has too many endpoints!\n",
467 if_desc->desc.bInterfaceNumber);
470 /* found an endpoint */
472 memcpy(&if_desc->ep_desc[epno], head,
473 USB_DT_ENDPOINT_SIZE);
474 ep_wMaxPacketSize = get_unaligned(&dev->config.\
478 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
483 debug("if %d, ep %d\n", ifno, epno);
485 case USB_DT_SS_ENDPOINT_COMP:
486 if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
487 printf("ERROR: Invalid USB EPC length (%d)\n",
491 if (index + USB_DT_SS_EP_COMP_SIZE >
492 dev->config.desc.wTotalLength) {
493 puts("USB EPC descriptor overflowed buffer!\n");
496 if (ifno < 0 || epno < 0) {
497 puts("EPC descriptor out of order!\n");
500 if_desc = &dev->config.if_desc[ifno];
501 memcpy(&if_desc->ss_ep_comp_desc[epno], head,
502 USB_DT_SS_EP_COMP_SIZE);
505 if (head->bLength == 0)
508 debug("unknown Description Type : %x\n",
509 head->bDescriptorType);
513 unsigned char *ch = (unsigned char *)head;
516 for (i = 0; i < head->bLength; i++)
517 debug("%02X ", *ch++);
523 index += head->bLength;
524 head = (struct usb_descriptor_header *)&buffer[index];
529 /***********************************************************************
531 * endp: endpoint number in bits 0-3;
532 * direction flag in bit 7 (1 = IN, 0 = OUT)
534 int usb_clear_halt(struct usb_device *dev, int pipe)
537 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
539 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
540 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
541 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
543 /* don't clear if failed */
548 * NOTE: we do not get status and verify reset was successful
549 * as some devices are reported to lock up upon this check..
552 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
554 /* toggle is reset on clear */
555 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
560 /**********************************************************************
561 * get_descriptor type
563 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
564 unsigned char index, void *buf, int size)
566 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
567 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
568 (type << 8) + index, 0, buf, size,
572 /**********************************************************************
573 * gets len of configuration cfgno
575 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
578 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
579 struct usb_config_descriptor *config;
581 config = (struct usb_config_descriptor *)&buffer[0];
582 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
585 printf("unable to get descriptor, error %lX\n",
588 printf("config descriptor too short " \
589 "(expected %i, got %i)\n", 9, result);
592 return le16_to_cpu(config->wTotalLength);
595 /**********************************************************************
596 * gets configuration cfgno and store it in the buffer
598 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
599 unsigned char *buffer, int length)
602 struct usb_config_descriptor *config;
604 config = (struct usb_config_descriptor *)&buffer[0];
605 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
606 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
607 le16_to_cpu(config->wTotalLength));
608 config->wTotalLength = result; /* validated, with CPU byte order */
613 /********************************************************************
614 * set address of a device to the value in dev->devnum.
615 * This can only be done by addressing the device via the default address (0)
617 static int usb_set_address(struct usb_device *dev)
619 debug("set address %d\n", dev->devnum);
621 return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
622 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
625 /********************************************************************
626 * set interface number to interface
628 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
630 struct usb_interface *if_face = NULL;
633 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
634 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
635 if_face = &dev->config.if_desc[i];
640 printf("selecting invalid interface %d", interface);
644 * We should return now for devices with only one alternate setting.
645 * According to 9.4.10 of the Universal Serial Bus Specification
646 * Revision 2.0 such devices can return with a STALL. This results in
647 * some USB sticks timeouting during initialization and then being
648 * unusable in U-Boot.
650 if (if_face->num_altsetting == 1)
653 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
654 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
655 alternate, interface, NULL, 0,
656 USB_CNTL_TIMEOUT * 5);
663 /********************************************************************
664 * set configuration number to configuration
666 static int usb_set_configuration(struct usb_device *dev, int configuration)
669 debug("set configuration %d\n", configuration);
670 /* set setup command */
671 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
672 USB_REQ_SET_CONFIGURATION, 0,
674 NULL, 0, USB_CNTL_TIMEOUT);
683 /********************************************************************
684 * set protocol to protocol
686 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
688 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
689 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
690 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
693 /********************************************************************
696 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
698 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
699 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
700 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
703 /********************************************************************
706 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
707 unsigned char id, void *buf, int size)
709 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
711 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
712 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
715 /********************************************************************
716 * get class descriptor
718 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
719 unsigned char type, unsigned char id, void *buf, int size)
721 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
722 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
723 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
726 /********************************************************************
727 * get string index in buffer
729 static int usb_get_string(struct usb_device *dev, unsigned short langid,
730 unsigned char index, void *buf, int size)
735 for (i = 0; i < 3; ++i) {
736 /* some devices are flaky */
737 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
738 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
739 (USB_DT_STRING << 8) + index, langid, buf, size,
750 static void usb_try_string_workarounds(unsigned char *buf, int *length)
752 int newlength, oldlength = *length;
754 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
755 if (!isprint(buf[newlength]) || buf[newlength + 1])
765 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
766 unsigned int index, unsigned char *buf)
770 /* Try to read the string descriptor by asking for the maximum
771 * possible number of bytes */
772 rc = usb_get_string(dev, langid, index, buf, 255);
774 /* If that failed try to read the descriptor length, then
775 * ask for just that many bytes */
777 rc = usb_get_string(dev, langid, index, buf, 2);
779 rc = usb_get_string(dev, langid, index, buf, buf[0]);
783 if (!buf[0] && !buf[1])
784 usb_try_string_workarounds(buf, &rc);
786 /* There might be extra junk at the end of the descriptor */
790 rc = rc - (rc & 1); /* force a multiple of two */
800 /********************************************************************
802 * Get string index and translate it to ascii.
803 * returns string length (> 0) or error (< 0)
805 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
807 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
812 if (size <= 0 || !buf || !index)
817 /* get langid for strings if it's not yet known */
818 if (!dev->have_langid) {
819 err = usb_string_sub(dev, 0, 0, tbuf);
821 debug("error getting string descriptor 0 " \
822 "(error=%lx)\n", dev->status);
824 } else if (tbuf[0] < 4) {
825 debug("string descriptor 0 too short\n");
828 dev->have_langid = -1;
829 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
830 /* always use the first langid listed */
831 debug("USB device number %d default " \
832 "language ID 0x%x\n",
833 dev->devnum, dev->string_langid);
837 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
841 size--; /* leave room for trailing NULL char in output buffer */
842 for (idx = 0, u = 2; u < err; u += 2) {
845 if (tbuf[u+1]) /* high byte */
846 buf[idx++] = '?'; /* non-ASCII character */
848 buf[idx++] = tbuf[u];
856 /********************************************************************
857 * USB device handling:
858 * the USB device are static allocated [USB_MAX_DEVICE].
861 #if !CONFIG_IS_ENABLED(DM_USB)
863 /* returns a pointer to the device with the index [index].
864 * if the device is not assigned (dev->devnum==-1) returns NULL
866 struct usb_device *usb_get_dev_index(int index)
868 if (usb_dev[index].devnum == -1)
871 return &usb_dev[index];
874 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
877 debug("New Device %d\n", dev_index);
878 if (dev_index == USB_MAX_DEVICE) {
879 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
882 /* default Address is 0, real addresses start with 1 */
883 usb_dev[dev_index].devnum = dev_index + 1;
884 usb_dev[dev_index].maxchild = 0;
885 for (i = 0; i < USB_MAXCHILDREN; i++)
886 usb_dev[dev_index].children[i] = NULL;
887 usb_dev[dev_index].parent = NULL;
888 usb_dev[dev_index].controller = controller;
890 *devp = &usb_dev[dev_index - 1];
896 * Free the newly created device node.
897 * Called in error cases where configuring a newly attached
898 * device fails for some reason.
900 void usb_free_device(struct udevice *controller)
903 debug("Freeing device node: %d\n", dev_index);
904 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
905 usb_dev[dev_index].devnum = -1;
909 * XHCI issues Enable Slot command and thereafter
910 * allocates device contexts. Provide a weak alias
911 * function for the purpose, so that XHCI overrides it
912 * and EHCI/OHCI just work out of the box.
914 __weak int usb_alloc_device(struct usb_device *udev)
918 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
920 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
923 usb_reset_root_port(dev);
928 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
930 __maybe_unused struct usb_device_descriptor *desc;
931 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
934 desc = (struct usb_device_descriptor *)tmpbuf;
936 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
937 if (err < expect_len) {
939 printf("unable to get device descriptor (error=%d)\n",
943 printf("USB device descriptor short read (expected %i, got %i)\n",
948 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
953 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
956 * This is a Windows scheme of initialization sequence, with double
957 * reset of the device (Linux uses the same sequence)
958 * Some equipment is said to work only with such init sequence; this
959 * patch is based on the work by Alan Stern:
960 * http://sourceforge.net/mailarchive/forum.php?
961 * thread_id=5729457&forum_id=5398
965 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
966 * only 18 bytes long, this will terminate with a short packet. But if
967 * the maxpacket size is 8 or 16 the device may be waiting to transmit
968 * some more, or keeps on retransmitting the 8 byte header.
971 if (dev->speed == USB_SPEED_LOW) {
972 dev->descriptor.bMaxPacketSize0 = 8;
973 dev->maxpacketsize = PACKET_SIZE_8;
975 dev->descriptor.bMaxPacketSize0 = 64;
976 dev->maxpacketsize = PACKET_SIZE_64;
978 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
979 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
981 if (do_read && dev->speed == USB_SPEED_FULL) {
985 * Validate we've received only at least 8 bytes, not that
986 * we've received the entire descriptor. The reasoning is:
987 * - The code only uses fields in the first 8 bytes, so
988 * that's all we need to have fetched at this stage.
989 * - The smallest maxpacket size is 8 bytes. Before we know
990 * the actual maxpacket the device uses, the USB controller
991 * may only accept a single packet. Consequently we are only
992 * guaranteed to receive 1 packet (at least 8 bytes) even in
995 * At least the DWC2 controller needs to be programmed with
996 * the number of packets in addition to the number of bytes.
997 * A request for 64 bytes of data with the maxpacket guessed
998 * as 64 (above) yields a request for 1 packet.
1000 err = get_descriptor_len(dev, 64, 8);
1005 * Logitech Unifying Receiver 046d:c52b bcdDevice 12.10 seems
1006 * sensitive about the first Get Descriptor request. If there
1007 * are any other requests in the same microframe, the device
1008 * reports bogus data, first of the descriptor parts is not
1009 * sent to the host. Wait over one microframe duration here
1010 * (1mS for USB 1.x , 125uS for USB 2.0) to avoid triggering
1016 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
1017 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
1018 switch (dev->descriptor.bMaxPacketSize0) {
1020 dev->maxpacketsize = PACKET_SIZE_8;
1023 dev->maxpacketsize = PACKET_SIZE_16;
1026 dev->maxpacketsize = PACKET_SIZE_32;
1029 dev->maxpacketsize = PACKET_SIZE_64;
1032 printf("%s: invalid max packet size\n", __func__);
1039 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1040 struct usb_device *parent)
1045 * Allocate usb 3.0 device context.
1046 * USB 3.0 (xHCI) protocol tries to allocate device slot
1047 * and related data structures first. This call does that.
1048 * Refer to sec 4.3.2 in xHCI spec rev1.0
1050 err = usb_alloc_device(dev);
1052 printf("Cannot allocate device context to get SLOT_ID\n");
1055 err = usb_setup_descriptor(dev, do_read);
1058 err = usb_hub_port_reset(dev, parent);
1064 err = usb_set_address(dev); /* set address */
1067 printf("\n USB device not accepting new address " \
1068 "(error=%lX)\n", dev->status);
1072 mdelay(10); /* Let the SET_ADDRESS settle */
1075 * If we haven't read device descriptor before, read it here
1076 * after device is assigned an address. This is only applicable
1080 err = usb_setup_descriptor(dev, true);
1088 static int usb_device_is_ignored(u16 id_vendor, u16 id_product)
1092 const char *cur = NULL;
1094 /* ignore list depends on env support */
1095 if (!CONFIG_IS_ENABLED(ENV_SUPPORT))
1098 cur = env_get("usb_ignorelist");
1100 /* parse "usb_ignorelist" strictly */
1101 while (cur && cur[0] != '\0') {
1102 vid = simple_strtoul(cur, &end, 0);
1104 * If strtoul did not parse a single digit or the next char is
1105 * not ':' the ignore list is malformed.
1107 if (cur == end || end[0] != ':')
1111 pid = simple_strtoul(cur, &end, 0);
1112 /* Consider '*' as wildcard for the product ID */
1113 if (cur == end && end[0] == '*') {
1118 * The ignore list is malformed if no product ID / wildcard was
1119 * parsed or entries are not separated by ',' or terminated with
1122 if (cur == end || (end[0] != ',' && end[0] != '\0'))
1125 if (id_vendor == vid && (pid > U16_MAX || id_product == pid))
1136 int usb_select_config(struct usb_device *dev)
1138 unsigned char *tmpbuf = NULL;
1141 err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1145 /* correct le values */
1146 le16_to_cpus(&dev->descriptor.bcdUSB);
1147 le16_to_cpus(&dev->descriptor.idVendor);
1148 le16_to_cpus(&dev->descriptor.idProduct);
1149 le16_to_cpus(&dev->descriptor.bcdDevice);
1151 /* ignore devices from usb_ignorelist */
1152 err = usb_device_is_ignored(dev->descriptor.idVendor,
1153 dev->descriptor.idProduct);
1154 if (err == -ENODEV) {
1155 debug("Ignoring USB device 0x%x:0x%x\n",
1156 dev->descriptor.idVendor, dev->descriptor.idProduct);
1158 } else if (err == -EINVAL) {
1160 * Continue on "usb_ignorelist" parsing errors. The list is
1161 * parsed for each device returning the error would result in
1162 * ignoring all USB devices.
1163 * Since the parsing error is independent of the probed device
1164 * report errors with printf instead of dev_err.
1166 printf("usb_ignorelist parse error in \"%s\"\n",
1167 env_get("usb_ignorelist"));
1168 } else if (err < 0) {
1173 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1174 * about this first Get Descriptor request. If there are any other
1175 * requests in the first microframe, the stick crashes. Wait about
1176 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1180 /* only support for one config for now */
1181 err = usb_get_configuration_len(dev, 0);
1183 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1187 err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1190 printf("usb_new_device: Cannot read configuration, " \
1191 "skipping device %04x:%04x\n",
1192 dev->descriptor.idVendor, dev->descriptor.idProduct);
1196 usb_parse_config(dev, tmpbuf, 0);
1198 usb_set_maxpacket(dev);
1200 * we set the default configuration here
1201 * This seems premature. If the driver wants a different configuration
1202 * it will need to select itself.
1204 err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1206 printf("failed to set default configuration " \
1207 "len %d, status %lX\n", dev->act_len, dev->status);
1212 * Wait until the Set Configuration request gets processed by the
1213 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1214 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1218 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1219 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1220 dev->descriptor.iSerialNumber);
1221 memset(dev->mf, 0, sizeof(dev->mf));
1222 memset(dev->prod, 0, sizeof(dev->prod));
1223 memset(dev->serial, 0, sizeof(dev->serial));
1224 if (dev->descriptor.iManufacturer)
1225 usb_string(dev, dev->descriptor.iManufacturer,
1226 dev->mf, sizeof(dev->mf));
1227 if (dev->descriptor.iProduct)
1228 usb_string(dev, dev->descriptor.iProduct,
1229 dev->prod, sizeof(dev->prod));
1230 if (dev->descriptor.iSerialNumber)
1231 usb_string(dev, dev->descriptor.iSerialNumber,
1232 dev->serial, sizeof(dev->serial));
1233 debug("Manufacturer %s\n", dev->mf);
1234 debug("Product %s\n", dev->prod);
1235 debug("SerialNumber %s\n", dev->serial);
1240 int usb_setup_device(struct usb_device *dev, bool do_read,
1241 struct usb_device *parent)
1246 /* We still haven't set the Address yet */
1250 ret = usb_prepare_device(dev, addr, do_read, parent);
1253 ret = usb_select_config(dev);
1258 #if !CONFIG_IS_ENABLED(DM_USB)
1260 * By the time we get here, the device has gotten a new device ID
1261 * and is in the default state. We need to identify the thing and
1262 * get the ball rolling..
1264 * Returns 0 for success, != 0 for error.
1266 int usb_new_device(struct usb_device *dev)
1268 bool do_read = true;
1272 * XHCI needs to issue a Address device command to setup
1273 * proper device context structures, before it can interact
1274 * with the device. So a get_descriptor will fail before any
1275 * of that is done for XHCI unlike EHCI.
1277 #ifdef CONFIG_USB_XHCI_HCD
1280 err = usb_setup_device(dev, do_read, dev->parent);
1284 /* Now probe if the device is a hub */
1285 err = usb_hub_probe(dev, 0);
1294 int board_usb_init(int index, enum usb_init_type init)
1300 int board_usb_cleanup(int index, enum usb_init_type init)
1305 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1307 #if CONFIG_IS_ENABLED(DM_USB)
1310 return parent->children[port] != NULL;
1314 #if CONFIG_IS_ENABLED(DM_USB)
1315 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1316 uint8_t *hub_address, uint8_t *hub_port)
1318 struct udevice *parent;
1319 struct usb_device *uparent, *ttdev;
1322 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1323 * to the parent udevice, not the actual udevice belonging to the
1324 * udev as the device is not instantiated yet. So when searching
1325 * for the first usb-2 parent start with udev->dev not
1326 * udev->dev->parent .
1330 uparent = dev_get_parent_priv(parent);
1332 while (uparent->speed != USB_SPEED_HIGH) {
1333 struct udevice *dev = parent;
1335 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1336 printf("Error: Cannot find high speed parent of usb-1 device\n");
1342 ttdev = dev_get_parent_priv(dev);
1343 parent = dev->parent;
1344 uparent = dev_get_parent_priv(parent);
1346 *hub_address = uparent->devnum;
1347 *hub_port = ttdev->portnr;
1350 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1351 uint8_t *hub_address, uint8_t *hub_port)
1353 /* Find out the nearest parent which is high speed */
1354 while (udev->parent->parent != NULL)
1355 if (udev->parent->speed != USB_SPEED_HIGH) {
1356 udev = udev->parent;
1358 *hub_address = udev->parent->devnum;
1359 *hub_port = udev->portnr;
1363 printf("Error: Cannot find high speed parent of usb-1 device\n");