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. Some drivers may implement non-blocking
196 * polling: when non-block is true and the device is not responding return
197 * -EAGAIN instead of waiting for device to respond.
199 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
200 void *buffer, int transfer_len, int interval, bool nonblock)
202 return submit_int_msg(dev, pipe, buffer, transfer_len, interval,
207 * submits a control message and waits for comletion (at least timeout * 1ms)
208 * If timeout is 0, we don't wait for completion (used as example to set and
209 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
210 * allow control messages with 0 timeout, by previousely resetting the flag
211 * asynch_allowed (usb_disable_asynch(1)).
212 * returns the transferred length if OK or -1 if error. The transferred length
213 * and the current status are stored in the dev->act_len and dev->status.
215 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
216 unsigned char request, unsigned char requesttype,
217 unsigned short value, unsigned short index,
218 void *data, unsigned short size, int timeout)
220 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
223 if ((timeout == 0) && (!asynch_allowed)) {
224 /* request for a asynch control pipe is not allowed */
228 /* set setup command */
229 setup_packet->requesttype = requesttype;
230 setup_packet->request = request;
231 setup_packet->value = cpu_to_le16(value);
232 setup_packet->index = cpu_to_le16(index);
233 setup_packet->length = cpu_to_le16(size);
234 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
235 "value 0x%X index 0x%X length 0x%X\n",
236 request, requesttype, value, index, size);
237 dev->status = USB_ST_NOT_PROC; /*not yet processed */
239 err = submit_control_msg(dev, pipe, data, size, setup_packet);
246 * Wait for status to update until timeout expires, USB driver
247 * interrupt handler may set the status when the USB operation has
251 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
262 /*-------------------------------------------------------------------
263 * submits bulk message, and waits for completion. returns 0 if Ok or
265 * synchronous behavior
267 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
268 void *data, int len, int *actual_length, int timeout)
272 dev->status = USB_ST_NOT_PROC; /*not yet processed */
273 if (submit_bulk_msg(dev, pipe, data, len) < 0)
276 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
280 *actual_length = dev->act_len;
281 if (dev->status == 0)
288 /*-------------------------------------------------------------------
293 * returns the max packet size, depending on the pipe direction and
294 * the configurations values
296 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
298 /* direction is out -> use emaxpacket out */
299 if ((pipe & USB_DIR_IN) == 0)
300 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
302 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
306 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
307 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
308 * when it is inlined in 1 single routine. What happens is that the register r3
309 * is used as loop-count 'i', but gets overwritten later on.
310 * This is clearly a compiler bug, but it is easier to workaround it here than
311 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
312 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
314 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
317 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
320 struct usb_endpoint_descriptor *ep;
321 u16 ep_wMaxPacketSize;
323 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
325 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
326 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
328 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
329 USB_ENDPOINT_XFER_CONTROL) {
330 /* Control => bidirectional */
331 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
332 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
333 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
334 b, dev->epmaxpacketin[b]);
336 if ((ep->bEndpointAddress & 0x80) == 0) {
338 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
339 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
340 debug("##EP epmaxpacketout[%d] = %d\n",
341 b, dev->epmaxpacketout[b]);
345 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
346 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
347 debug("##EP epmaxpacketin[%d] = %d\n",
348 b, dev->epmaxpacketin[b]);
355 * set the max packed value of all endpoints in the given configuration
357 static int usb_set_maxpacket(struct usb_device *dev)
361 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
362 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
363 usb_set_maxpacket_ep(dev, i, ii);
368 /*******************************************************************************
369 * Parse the config, located in buffer, and fills the dev->config structure.
370 * Note that all little/big endian swapping are done automatically.
371 * (wTotalLength has already been swapped and sanitized when it was read.)
373 static int usb_parse_config(struct usb_device *dev,
374 unsigned char *buffer, int cfgno)
376 struct usb_descriptor_header *head;
377 int index, ifno, epno, curr_if_num;
378 u16 ep_wMaxPacketSize;
379 struct usb_interface *if_desc = NULL;
385 dev->configno = cfgno;
386 head = (struct usb_descriptor_header *) &buffer[0];
387 if (head->bDescriptorType != USB_DT_CONFIG) {
388 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
389 head->bDescriptorType);
392 if (head->bLength != USB_DT_CONFIG_SIZE) {
393 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
396 memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
397 dev->config.no_of_if = 0;
399 index = dev->config.desc.bLength;
400 /* Ok the first entry must be a configuration entry,
401 * now process the others */
402 head = (struct usb_descriptor_header *) &buffer[index];
403 while (index + 1 < dev->config.desc.wTotalLength && head->bLength) {
404 switch (head->bDescriptorType) {
405 case USB_DT_INTERFACE:
406 if (head->bLength != USB_DT_INTERFACE_SIZE) {
407 printf("ERROR: Invalid USB IF length (%d)\n",
411 if (index + USB_DT_INTERFACE_SIZE >
412 dev->config.desc.wTotalLength) {
413 puts("USB IF descriptor overflowed buffer!\n");
416 if (((struct usb_interface_descriptor *) \
417 head)->bInterfaceNumber != curr_if_num) {
418 /* this is a new interface, copy new desc */
419 ifno = dev->config.no_of_if;
420 if (ifno >= USB_MAXINTERFACES) {
421 puts("Too many USB interfaces!\n");
422 /* try to go on with what we have */
425 if_desc = &dev->config.if_desc[ifno];
426 dev->config.no_of_if++;
427 memcpy(if_desc, head,
428 USB_DT_INTERFACE_SIZE);
429 if_desc->no_of_ep = 0;
430 if_desc->num_altsetting = 1;
432 if_desc->desc.bInterfaceNumber;
434 /* found alternate setting for the interface */
436 if_desc = &dev->config.if_desc[ifno];
437 if_desc->num_altsetting++;
441 case USB_DT_ENDPOINT:
442 if (head->bLength != USB_DT_ENDPOINT_SIZE &&
443 head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) {
444 printf("ERROR: Invalid USB EP length (%d)\n",
448 if (index + head->bLength >
449 dev->config.desc.wTotalLength) {
450 puts("USB EP descriptor overflowed buffer!\n");
454 puts("Endpoint descriptor out of order!\n");
457 epno = dev->config.if_desc[ifno].no_of_ep;
458 if_desc = &dev->config.if_desc[ifno];
459 if (epno >= USB_MAXENDPOINTS) {
460 printf("Interface %d has too many endpoints!\n",
461 if_desc->desc.bInterfaceNumber);
464 /* found an endpoint */
466 memcpy(&if_desc->ep_desc[epno], head,
467 USB_DT_ENDPOINT_SIZE);
468 ep_wMaxPacketSize = get_unaligned(&dev->config.\
472 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
477 debug("if %d, ep %d\n", ifno, epno);
479 case USB_DT_SS_ENDPOINT_COMP:
480 if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
481 printf("ERROR: Invalid USB EPC length (%d)\n",
485 if (index + USB_DT_SS_EP_COMP_SIZE >
486 dev->config.desc.wTotalLength) {
487 puts("USB EPC descriptor overflowed buffer!\n");
490 if (ifno < 0 || epno < 0) {
491 puts("EPC descriptor out of order!\n");
494 if_desc = &dev->config.if_desc[ifno];
495 memcpy(&if_desc->ss_ep_comp_desc[epno], head,
496 USB_DT_SS_EP_COMP_SIZE);
499 if (head->bLength == 0)
502 debug("unknown Description Type : %x\n",
503 head->bDescriptorType);
507 unsigned char *ch = (unsigned char *)head;
510 for (i = 0; i < head->bLength; i++)
511 debug("%02X ", *ch++);
517 index += head->bLength;
518 head = (struct usb_descriptor_header *)&buffer[index];
523 /***********************************************************************
525 * endp: endpoint number in bits 0-3;
526 * direction flag in bit 7 (1 = IN, 0 = OUT)
528 int usb_clear_halt(struct usb_device *dev, int pipe)
531 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
533 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
534 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
535 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
537 /* don't clear if failed */
542 * NOTE: we do not get status and verify reset was successful
543 * as some devices are reported to lock up upon this check..
546 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
548 /* toggle is reset on clear */
549 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
554 /**********************************************************************
555 * get_descriptor type
557 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
558 unsigned char index, void *buf, int size)
560 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
561 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
562 (type << 8) + index, 0, buf, size,
566 /**********************************************************************
567 * gets len of configuration cfgno
569 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
572 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
573 struct usb_config_descriptor *config;
575 config = (struct usb_config_descriptor *)&buffer[0];
576 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
579 printf("unable to get descriptor, error %lX\n",
582 printf("config descriptor too short " \
583 "(expected %i, got %i)\n", 9, result);
586 return le16_to_cpu(config->wTotalLength);
589 /**********************************************************************
590 * gets configuration cfgno and store it in the buffer
592 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
593 unsigned char *buffer, int length)
596 struct usb_config_descriptor *config;
598 config = (struct usb_config_descriptor *)&buffer[0];
599 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
600 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result,
601 le16_to_cpu(config->wTotalLength));
602 config->wTotalLength = result; /* validated, with CPU byte order */
607 /********************************************************************
608 * set address of a device to the value in dev->devnum.
609 * This can only be done by addressing the device via the default address (0)
611 static int usb_set_address(struct usb_device *dev)
613 debug("set address %d\n", dev->devnum);
615 return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
616 0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
619 /********************************************************************
620 * set interface number to interface
622 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
624 struct usb_interface *if_face = NULL;
627 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
628 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
629 if_face = &dev->config.if_desc[i];
634 printf("selecting invalid interface %d", interface);
638 * We should return now for devices with only one alternate setting.
639 * According to 9.4.10 of the Universal Serial Bus Specification
640 * Revision 2.0 such devices can return with a STALL. This results in
641 * some USB sticks timeouting during initialization and then being
642 * unusable in U-Boot.
644 if (if_face->num_altsetting == 1)
647 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
648 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
649 alternate, interface, NULL, 0,
650 USB_CNTL_TIMEOUT * 5);
657 /********************************************************************
658 * set configuration number to configuration
660 static int usb_set_configuration(struct usb_device *dev, int configuration)
663 debug("set configuration %d\n", configuration);
664 /* set setup command */
665 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
666 USB_REQ_SET_CONFIGURATION, 0,
668 NULL, 0, USB_CNTL_TIMEOUT);
677 /********************************************************************
678 * set protocol to protocol
680 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
682 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
683 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
684 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
687 /********************************************************************
690 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
692 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
693 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
694 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
697 /********************************************************************
700 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
701 unsigned char id, void *buf, int size)
703 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
705 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
706 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
709 /********************************************************************
710 * get class descriptor
712 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
713 unsigned char type, unsigned char id, void *buf, int size)
715 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
716 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
717 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
720 /********************************************************************
721 * get string index in buffer
723 static int usb_get_string(struct usb_device *dev, unsigned short langid,
724 unsigned char index, void *buf, int size)
729 for (i = 0; i < 3; ++i) {
730 /* some devices are flaky */
731 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
732 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
733 (USB_DT_STRING << 8) + index, langid, buf, size,
744 static void usb_try_string_workarounds(unsigned char *buf, int *length)
746 int newlength, oldlength = *length;
748 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
749 if (!isprint(buf[newlength]) || buf[newlength + 1])
759 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
760 unsigned int index, unsigned char *buf)
764 /* Try to read the string descriptor by asking for the maximum
765 * possible number of bytes */
766 rc = usb_get_string(dev, langid, index, buf, 255);
768 /* If that failed try to read the descriptor length, then
769 * ask for just that many bytes */
771 rc = usb_get_string(dev, langid, index, buf, 2);
773 rc = usb_get_string(dev, langid, index, buf, buf[0]);
777 if (!buf[0] && !buf[1])
778 usb_try_string_workarounds(buf, &rc);
780 /* There might be extra junk at the end of the descriptor */
784 rc = rc - (rc & 1); /* force a multiple of two */
794 /********************************************************************
796 * Get string index and translate it to ascii.
797 * returns string length (> 0) or error (< 0)
799 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
801 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
806 if (size <= 0 || !buf || !index)
811 /* get langid for strings if it's not yet known */
812 if (!dev->have_langid) {
813 err = usb_string_sub(dev, 0, 0, tbuf);
815 debug("error getting string descriptor 0 " \
816 "(error=%lx)\n", dev->status);
818 } else if (tbuf[0] < 4) {
819 debug("string descriptor 0 too short\n");
822 dev->have_langid = -1;
823 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
824 /* always use the first langid listed */
825 debug("USB device number %d default " \
826 "language ID 0x%x\n",
827 dev->devnum, dev->string_langid);
831 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
835 size--; /* leave room for trailing NULL char in output buffer */
836 for (idx = 0, u = 2; u < err; u += 2) {
839 if (tbuf[u+1]) /* high byte */
840 buf[idx++] = '?'; /* non-ASCII character */
842 buf[idx++] = tbuf[u];
850 /********************************************************************
851 * USB device handling:
852 * the USB device are static allocated [USB_MAX_DEVICE].
855 #if !CONFIG_IS_ENABLED(DM_USB)
857 /* returns a pointer to the device with the index [index].
858 * if the device is not assigned (dev->devnum==-1) returns NULL
860 struct usb_device *usb_get_dev_index(int index)
862 if (usb_dev[index].devnum == -1)
865 return &usb_dev[index];
868 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
871 debug("New Device %d\n", dev_index);
872 if (dev_index == USB_MAX_DEVICE) {
873 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
876 /* default Address is 0, real addresses start with 1 */
877 usb_dev[dev_index].devnum = dev_index + 1;
878 usb_dev[dev_index].maxchild = 0;
879 for (i = 0; i < USB_MAXCHILDREN; i++)
880 usb_dev[dev_index].children[i] = NULL;
881 usb_dev[dev_index].parent = NULL;
882 usb_dev[dev_index].controller = controller;
884 *devp = &usb_dev[dev_index - 1];
890 * Free the newly created device node.
891 * Called in error cases where configuring a newly attached
892 * device fails for some reason.
894 void usb_free_device(struct udevice *controller)
897 debug("Freeing device node: %d\n", dev_index);
898 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
899 usb_dev[dev_index].devnum = -1;
903 * XHCI issues Enable Slot command and thereafter
904 * allocates device contexts. Provide a weak alias
905 * function for the purpose, so that XHCI overrides it
906 * and EHCI/OHCI just work out of the box.
908 __weak int usb_alloc_device(struct usb_device *udev)
912 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
914 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
917 usb_reset_root_port(dev);
922 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
924 __maybe_unused struct usb_device_descriptor *desc;
925 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
928 desc = (struct usb_device_descriptor *)tmpbuf;
930 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
931 if (err < expect_len) {
933 printf("unable to get device descriptor (error=%d)\n",
937 printf("USB device descriptor short read (expected %i, got %i)\n",
942 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
947 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
950 * This is a Windows scheme of initialization sequence, with double
951 * reset of the device (Linux uses the same sequence)
952 * Some equipment is said to work only with such init sequence; this
953 * patch is based on the work by Alan Stern:
954 * http://sourceforge.net/mailarchive/forum.php?
955 * thread_id=5729457&forum_id=5398
959 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
960 * only 18 bytes long, this will terminate with a short packet. But if
961 * the maxpacket size is 8 or 16 the device may be waiting to transmit
962 * some more, or keeps on retransmitting the 8 byte header.
965 if (dev->speed == USB_SPEED_LOW) {
966 dev->descriptor.bMaxPacketSize0 = 8;
967 dev->maxpacketsize = PACKET_SIZE_8;
969 dev->descriptor.bMaxPacketSize0 = 64;
970 dev->maxpacketsize = PACKET_SIZE_64;
972 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
973 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
975 if (do_read && dev->speed == USB_SPEED_FULL) {
979 * Validate we've received only at least 8 bytes, not that
980 * we've received the entire descriptor. The reasoning is:
981 * - The code only uses fields in the first 8 bytes, so
982 * that's all we need to have fetched at this stage.
983 * - The smallest maxpacket size is 8 bytes. Before we know
984 * the actual maxpacket the device uses, the USB controller
985 * may only accept a single packet. Consequently we are only
986 * guaranteed to receive 1 packet (at least 8 bytes) even in
989 * At least the DWC2 controller needs to be programmed with
990 * the number of packets in addition to the number of bytes.
991 * A request for 64 bytes of data with the maxpacket guessed
992 * as 64 (above) yields a request for 1 packet.
994 err = get_descriptor_len(dev, 64, 8);
999 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
1000 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
1001 switch (dev->descriptor.bMaxPacketSize0) {
1003 dev->maxpacketsize = PACKET_SIZE_8;
1006 dev->maxpacketsize = PACKET_SIZE_16;
1009 dev->maxpacketsize = PACKET_SIZE_32;
1012 dev->maxpacketsize = PACKET_SIZE_64;
1015 printf("%s: invalid max packet size\n", __func__);
1022 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1023 struct usb_device *parent)
1028 * Allocate usb 3.0 device context.
1029 * USB 3.0 (xHCI) protocol tries to allocate device slot
1030 * and related data structures first. This call does that.
1031 * Refer to sec 4.3.2 in xHCI spec rev1.0
1033 err = usb_alloc_device(dev);
1035 printf("Cannot allocate device context to get SLOT_ID\n");
1038 err = usb_setup_descriptor(dev, do_read);
1041 err = usb_hub_port_reset(dev, parent);
1047 err = usb_set_address(dev); /* set address */
1050 printf("\n USB device not accepting new address " \
1051 "(error=%lX)\n", dev->status);
1055 mdelay(10); /* Let the SET_ADDRESS settle */
1058 * If we haven't read device descriptor before, read it here
1059 * after device is assigned an address. This is only applicable
1063 err = usb_setup_descriptor(dev, true);
1071 int usb_select_config(struct usb_device *dev)
1073 unsigned char *tmpbuf = NULL;
1076 err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1080 /* correct le values */
1081 le16_to_cpus(&dev->descriptor.bcdUSB);
1082 le16_to_cpus(&dev->descriptor.idVendor);
1083 le16_to_cpus(&dev->descriptor.idProduct);
1084 le16_to_cpus(&dev->descriptor.bcdDevice);
1087 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1088 * about this first Get Descriptor request. If there are any other
1089 * requests in the first microframe, the stick crashes. Wait about
1090 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1094 /* only support for one config for now */
1095 err = usb_get_configuration_len(dev, 0);
1097 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1101 err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1104 printf("usb_new_device: Cannot read configuration, " \
1105 "skipping device %04x:%04x\n",
1106 dev->descriptor.idVendor, dev->descriptor.idProduct);
1110 usb_parse_config(dev, tmpbuf, 0);
1112 usb_set_maxpacket(dev);
1114 * we set the default configuration here
1115 * This seems premature. If the driver wants a different configuration
1116 * it will need to select itself.
1118 err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1120 printf("failed to set default configuration " \
1121 "len %d, status %lX\n", dev->act_len, dev->status);
1126 * Wait until the Set Configuration request gets processed by the
1127 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1128 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1132 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1133 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
1134 dev->descriptor.iSerialNumber);
1135 memset(dev->mf, 0, sizeof(dev->mf));
1136 memset(dev->prod, 0, sizeof(dev->prod));
1137 memset(dev->serial, 0, sizeof(dev->serial));
1138 if (dev->descriptor.iManufacturer)
1139 usb_string(dev, dev->descriptor.iManufacturer,
1140 dev->mf, sizeof(dev->mf));
1141 if (dev->descriptor.iProduct)
1142 usb_string(dev, dev->descriptor.iProduct,
1143 dev->prod, sizeof(dev->prod));
1144 if (dev->descriptor.iSerialNumber)
1145 usb_string(dev, dev->descriptor.iSerialNumber,
1146 dev->serial, sizeof(dev->serial));
1147 debug("Manufacturer %s\n", dev->mf);
1148 debug("Product %s\n", dev->prod);
1149 debug("SerialNumber %s\n", dev->serial);
1154 int usb_setup_device(struct usb_device *dev, bool do_read,
1155 struct usb_device *parent)
1160 /* We still haven't set the Address yet */
1164 ret = usb_prepare_device(dev, addr, do_read, parent);
1167 ret = usb_select_config(dev);
1172 #if !CONFIG_IS_ENABLED(DM_USB)
1174 * By the time we get here, the device has gotten a new device ID
1175 * and is in the default state. We need to identify the thing and
1176 * get the ball rolling..
1178 * Returns 0 for success, != 0 for error.
1180 int usb_new_device(struct usb_device *dev)
1182 bool do_read = true;
1186 * XHCI needs to issue a Address device command to setup
1187 * proper device context structures, before it can interact
1188 * with the device. So a get_descriptor will fail before any
1189 * of that is done for XHCI unlike EHCI.
1191 #ifdef CONFIG_USB_XHCI_HCD
1194 err = usb_setup_device(dev, do_read, dev->parent);
1198 /* Now probe if the device is a hub */
1199 err = usb_hub_probe(dev, 0);
1208 int board_usb_init(int index, enum usb_init_type init)
1214 int board_usb_cleanup(int index, enum usb_init_type init)
1219 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1221 #if CONFIG_IS_ENABLED(DM_USB)
1224 return parent->children[port] != NULL;
1228 #if CONFIG_IS_ENABLED(DM_USB)
1229 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1230 uint8_t *hub_address, uint8_t *hub_port)
1232 struct udevice *parent;
1233 struct usb_device *uparent, *ttdev;
1236 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1237 * to the parent udevice, not the actual udevice belonging to the
1238 * udev as the device is not instantiated yet. So when searching
1239 * for the first usb-2 parent start with udev->dev not
1240 * udev->dev->parent .
1244 uparent = dev_get_parent_priv(parent);
1246 while (uparent->speed != USB_SPEED_HIGH) {
1247 struct udevice *dev = parent;
1249 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1250 printf("Error: Cannot find high speed parent of usb-1 device\n");
1256 ttdev = dev_get_parent_priv(dev);
1257 parent = dev->parent;
1258 uparent = dev_get_parent_priv(parent);
1260 *hub_address = uparent->devnum;
1261 *hub_port = ttdev->portnr;
1264 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1265 uint8_t *hub_address, uint8_t *hub_port)
1267 /* Find out the nearest parent which is high speed */
1268 while (udev->parent->parent != NULL)
1269 if (udev->parent->speed != USB_SPEED_HIGH) {
1270 udev = udev->parent;
1272 *hub_address = udev->parent->devnum;
1273 *hub_port = udev->portnr;
1277 printf("Error: Cannot find high speed parent of usb-1 device\n");