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
18 * See file CREDITS for list of people who contributed to this
21 * This program is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU General Public License as
23 * published by the Free Software Foundation; either version 2 of
24 * the License, or (at your option) any later version.
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
31 * You should have received a copy of the GNU General Public License
32 * along with this program; if not, write to the Free Software
33 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
41 * Since this is a bootloader, the devices will not be automatic
42 * (re)configured on hotplug, but after a restart of the USB the
45 * For each transfer (except "Interrupt") we wait for completion.
49 #include <asm/processor.h>
50 #include <linux/ctype.h>
51 #include <asm/byteorder.h>
52 #include <asm/unaligned.h>
56 #include <asm/4xx_pci.h>
61 #define USB_HUB_DEBUG 1
64 #define USB_HUB_DEBUG 0
67 #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args)
68 #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args)
70 #define USB_BUFSIZ 512
72 static struct usb_device usb_dev[USB_MAX_DEVICE];
75 static int asynch_allowed;
76 static struct devrequest setup_packet;
78 char usb_started; /* flag for the started/stopped USB status */
80 /**********************************************************************
81 * some forward declerations...
83 static void usb_scan_devices(void);
85 /***********************************************************************
89 inline void wait_ms(unsigned long ms)
95 /***************************************************************************
107 /* init low_level USB */
109 result = usb_lowlevel_init();
110 /* if lowlevel init is OK, scan the bus for devices
111 * i.e. search HUBs and configure them */
113 printf("scanning bus for devices... ");
119 printf("Error, couldn't init Lowlevel part\n");
125 /******************************************************************************
126 * Stop USB this stops the LowLevel Part and deregisters USB devices.
136 res = usb_lowlevel_stop();
142 * disables the asynch behaviour of the control message. This is used for data
143 * transfers that uses the exclusiv access to the control and bulk messages.
144 * Returns the old value so it can be restored later.
146 int usb_disable_asynch(int disable)
148 int old_value = asynch_allowed;
150 asynch_allowed = !disable;
155 /*-------------------------------------------------------------------
161 * submits an Interrupt Message
163 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
164 void *buffer, int transfer_len, int interval)
166 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
170 * submits a control message and waits for comletion (at least timeout * 1ms)
171 * If timeout is 0, we don't wait for completion (used as example to set and
172 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
173 * allow control messages with 0 timeout, by previousely resetting the flag
174 * asynch_allowed (usb_disable_asynch(1)).
175 * returns the transfered length if OK or -1 if error. The transfered length
176 * and the current status are stored in the dev->act_len and dev->status.
178 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
179 unsigned char request, unsigned char requesttype,
180 unsigned short value, unsigned short index,
181 void *data, unsigned short size, int timeout)
183 if ((timeout == 0) && (!asynch_allowed)) {
184 /* request for a asynch control pipe is not allowed */
188 /* set setup command */
189 setup_packet.requesttype = requesttype;
190 setup_packet.request = request;
191 setup_packet.value = cpu_to_le16(value);
192 setup_packet.index = cpu_to_le16(index);
193 setup_packet.length = cpu_to_le16(size);
194 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
195 "value 0x%X index 0x%X length 0x%X\n",
196 request, requesttype, value, index, size);
197 dev->status = USB_ST_NOT_PROC; /*not yet processed */
199 submit_control_msg(dev, pipe, data, size, &setup_packet);
204 * Wait for status to update until timeout expires, USB driver
205 * interrupt handler may set the status when the USB operation has
209 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
220 /*-------------------------------------------------------------------
221 * submits bulk message, and waits for completion. returns 0 if Ok or
223 * synchronous behavior
225 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
226 void *data, int len, int *actual_length, int timeout)
230 dev->status = USB_ST_NOT_PROC; /*not yet processed */
231 submit_bulk_msg(dev, pipe, data, len);
233 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
237 *actual_length = dev->act_len;
238 if (dev->status == 0)
245 /*-------------------------------------------------------------------
250 * returns the max packet size, depending on the pipe direction and
251 * the configurations values
253 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
255 /* direction is out -> use emaxpacket out */
256 if ((pipe & USB_DIR_IN) == 0)
257 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
259 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
263 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
264 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
265 * when it is inlined in 1 single routine. What happens is that the register r3
266 * is used as loop-count 'i', but gets overwritten later on.
267 * This is clearly a compiler bug, but it is easier to workaround it here than
268 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
269 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
271 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
273 static void __attribute__((noinline))
274 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
277 struct usb_endpoint_descriptor *ep;
278 u16 ep_wMaxPacketSize;
280 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
282 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
283 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
285 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
286 USB_ENDPOINT_XFER_CONTROL) {
287 /* Control => bidirectional */
288 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
289 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
290 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
291 b, dev->epmaxpacketin[b]);
293 if ((ep->bEndpointAddress & 0x80) == 0) {
295 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
296 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
297 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
298 b, dev->epmaxpacketout[b]);
302 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
303 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
304 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
305 b, dev->epmaxpacketin[b]);
312 * set the max packed value of all endpoints in the given configuration
314 static int usb_set_maxpacket(struct usb_device *dev)
318 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
319 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
320 usb_set_maxpacket_ep(dev, i, ii);
325 /*******************************************************************************
326 * Parse the config, located in buffer, and fills the dev->config structure.
327 * Note that all little/big endian swapping are done automatically.
329 static int usb_parse_config(struct usb_device *dev,
330 unsigned char *buffer, int cfgno)
332 struct usb_descriptor_header *head;
333 int index, ifno, epno, curr_if_num;
335 u16 ep_wMaxPacketSize;
341 dev->configno = cfgno;
342 head = (struct usb_descriptor_header *) &buffer[0];
343 if (head->bDescriptorType != USB_DT_CONFIG) {
344 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
345 head->bDescriptorType);
348 memcpy(&dev->config, buffer, buffer[0]);
349 le16_to_cpus(&(dev->config.desc.wTotalLength));
350 dev->config.no_of_if = 0;
352 index = dev->config.desc.bLength;
353 /* Ok the first entry must be a configuration entry,
354 * now process the others */
355 head = (struct usb_descriptor_header *) &buffer[index];
356 while (index + 1 < dev->config.desc.wTotalLength) {
357 switch (head->bDescriptorType) {
358 case USB_DT_INTERFACE:
359 if (((struct usb_interface_descriptor *) \
360 &buffer[index])->bInterfaceNumber != curr_if_num) {
361 /* this is a new interface, copy new desc */
362 ifno = dev->config.no_of_if;
363 dev->config.no_of_if++;
364 memcpy(&dev->config.if_desc[ifno],
365 &buffer[index], buffer[index]);
366 dev->config.if_desc[ifno].no_of_ep = 0;
367 dev->config.if_desc[ifno].num_altsetting = 1;
369 dev->config.if_desc[ifno].desc.bInterfaceNumber;
371 /* found alternate setting for the interface */
372 dev->config.if_desc[ifno].num_altsetting++;
375 case USB_DT_ENDPOINT:
376 epno = dev->config.if_desc[ifno].no_of_ep;
377 /* found an endpoint */
378 dev->config.if_desc[ifno].no_of_ep++;
379 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
380 &buffer[index], buffer[index]);
381 ep_wMaxPacketSize = get_unaligned(&dev->config.\
385 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
390 USB_PRINTF("if %d, ep %d\n", ifno, epno);
393 if (head->bLength == 0)
396 USB_PRINTF("unknown Description Type : %x\n",
397 head->bDescriptorType);
401 unsigned char *ch = (unsigned char *)head;
403 for (i = 0; i < head->bLength; i++)
404 USB_PRINTF("%02X ", *ch++);
405 USB_PRINTF("\n\n\n");
409 index += head->bLength;
410 head = (struct usb_descriptor_header *)&buffer[index];
415 /***********************************************************************
417 * endp: endpoint number in bits 0-3;
418 * direction flag in bit 7 (1 = IN, 0 = OUT)
420 int usb_clear_halt(struct usb_device *dev, int pipe)
423 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
425 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
426 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
427 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
429 /* don't clear if failed */
434 * NOTE: we do not get status and verify reset was successful
435 * as some devices are reported to lock up upon this check..
438 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
440 /* toggle is reset on clear */
441 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
446 /**********************************************************************
447 * get_descriptor type
449 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
450 unsigned char index, void *buf, int size)
453 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
454 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
455 (type << 8) + index, 0,
456 buf, size, USB_CNTL_TIMEOUT);
460 /**********************************************************************
461 * gets configuration cfgno and store it in the buffer
463 int usb_get_configuration_no(struct usb_device *dev,
464 unsigned char *buffer, int cfgno)
468 struct usb_configuration_descriptor *config;
470 config = (struct usb_configuration_descriptor *)&buffer[0];
471 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
474 printf("unable to get descriptor, error %lX\n",
477 printf("config descriptor too short " \
478 "(expected %i, got %i)\n", 9, result);
481 tmp = le16_to_cpu(config->wTotalLength);
483 if (tmp > USB_BUFSIZ) {
484 USB_PRINTF("usb_get_configuration_no: failed to get " \
485 "descriptor - too long: %d\n", tmp);
489 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
490 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
495 /********************************************************************
496 * set address of a device to the value in dev->devnum.
497 * This can only be done by addressing the device via the default address (0)
499 static int usb_set_address(struct usb_device *dev)
503 USB_PRINTF("set address %d\n", dev->devnum);
504 res = usb_control_msg(dev, usb_snddefctrl(dev),
505 USB_REQ_SET_ADDRESS, 0,
507 NULL, 0, USB_CNTL_TIMEOUT);
511 /********************************************************************
512 * set interface number to interface
514 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
516 struct usb_interface *if_face = NULL;
519 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
520 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
521 if_face = &dev->config.if_desc[i];
526 printf("selecting invalid interface %d", interface);
530 * We should return now for devices with only one alternate setting.
531 * According to 9.4.10 of the Universal Serial Bus Specification
532 * Revision 2.0 such devices can return with a STALL. This results in
533 * some USB sticks timeouting during initialization and then being
534 * unusable in U-Boot.
536 if (if_face->num_altsetting == 1)
539 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
540 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
541 alternate, interface, NULL, 0,
542 USB_CNTL_TIMEOUT * 5);
549 /********************************************************************
550 * set configuration number to configuration
552 static int usb_set_configuration(struct usb_device *dev, int configuration)
555 USB_PRINTF("set configuration %d\n", configuration);
556 /* set setup command */
557 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
558 USB_REQ_SET_CONFIGURATION, 0,
560 NULL, 0, USB_CNTL_TIMEOUT);
569 /********************************************************************
570 * set protocol to protocol
572 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
574 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
575 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
576 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
579 /********************************************************************
582 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
584 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
585 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
586 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
589 /********************************************************************
592 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
593 unsigned char id, void *buf, int size)
595 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
597 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
598 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
601 /********************************************************************
602 * get class descriptor
604 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
605 unsigned char type, unsigned char id, void *buf, int size)
607 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
608 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
609 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
612 /********************************************************************
613 * get string index in buffer
615 static int usb_get_string(struct usb_device *dev, unsigned short langid,
616 unsigned char index, void *buf, int size)
621 for (i = 0; i < 3; ++i) {
622 /* some devices are flaky */
623 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
624 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
625 (USB_DT_STRING << 8) + index, langid, buf, size,
636 static void usb_try_string_workarounds(unsigned char *buf, int *length)
638 int newlength, oldlength = *length;
640 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
641 if (!isprint(buf[newlength]) || buf[newlength + 1])
651 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
652 unsigned int index, unsigned char *buf)
656 /* Try to read the string descriptor by asking for the maximum
657 * possible number of bytes */
658 rc = usb_get_string(dev, langid, index, buf, 255);
660 /* If that failed try to read the descriptor length, then
661 * ask for just that many bytes */
663 rc = usb_get_string(dev, langid, index, buf, 2);
665 rc = usb_get_string(dev, langid, index, buf, buf[0]);
669 if (!buf[0] && !buf[1])
670 usb_try_string_workarounds(buf, &rc);
672 /* There might be extra junk at the end of the descriptor */
676 rc = rc - (rc & 1); /* force a multiple of two */
686 /********************************************************************
688 * Get string index and translate it to ascii.
689 * returns string length (> 0) or error (< 0)
691 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
693 unsigned char mybuf[USB_BUFSIZ];
698 if (size <= 0 || !buf || !index)
703 /* get langid for strings if it's not yet known */
704 if (!dev->have_langid) {
705 err = usb_string_sub(dev, 0, 0, tbuf);
707 USB_PRINTF("error getting string descriptor 0 " \
708 "(error=%lx)\n", dev->status);
710 } else if (tbuf[0] < 4) {
711 USB_PRINTF("string descriptor 0 too short\n");
714 dev->have_langid = -1;
715 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
716 /* always use the first langid listed */
717 USB_PRINTF("USB device number %d default " \
718 "language ID 0x%x\n",
719 dev->devnum, dev->string_langid);
723 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
727 size--; /* leave room for trailing NULL char in output buffer */
728 for (idx = 0, u = 2; u < err; u += 2) {
731 if (tbuf[u+1]) /* high byte */
732 buf[idx++] = '?'; /* non-ASCII character */
734 buf[idx++] = tbuf[u];
742 /********************************************************************
743 * USB device handling:
744 * the USB device are static allocated [USB_MAX_DEVICE].
748 /* returns a pointer to the device with the index [index].
749 * if the device is not assigned (dev->devnum==-1) returns NULL
751 struct usb_device *usb_get_dev_index(int index)
753 if (usb_dev[index].devnum == -1)
756 return &usb_dev[index];
760 /* returns a pointer of a new device structure or NULL, if
761 * no device struct is available
763 struct usb_device *usb_alloc_new_device(void)
766 USB_PRINTF("New Device %d\n", dev_index);
767 if (dev_index == USB_MAX_DEVICE) {
768 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
771 /* default Address is 0, real addresses start with 1 */
772 usb_dev[dev_index].devnum = dev_index + 1;
773 usb_dev[dev_index].maxchild = 0;
774 for (i = 0; i < USB_MAXCHILDREN; i++)
775 usb_dev[dev_index].children[i] = NULL;
776 usb_dev[dev_index].parent = NULL;
778 return &usb_dev[dev_index - 1];
783 * By the time we get here, the device has gotten a new device ID
784 * and is in the default state. We need to identify the thing and
785 * get the ball rolling..
787 * Returns 0 for success, != 0 for error.
789 int usb_new_device(struct usb_device *dev)
793 unsigned char tmpbuf[USB_BUFSIZ];
795 /* We still haven't set the Address yet */
799 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
800 /* this is the old and known way of initializing devices, it is
801 * different than what Windows and Linux are doing. Windows and Linux
802 * both retrieve 64 bytes while reading the device descriptor
803 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
804 * invalid header while reading 8 bytes as device descriptor. */
805 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
806 dev->maxpacketsize = PACKET_SIZE_8;
807 dev->epmaxpacketin[0] = 8;
808 dev->epmaxpacketout[0] = 8;
810 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
812 printf("\n USB device not responding, " \
813 "giving up (status=%lX)\n", dev->status);
817 /* This is a Windows scheme of initialization sequence, with double
818 * reset of the device (Linux uses the same sequence)
819 * Some equipment is said to work only with such init sequence; this
820 * patch is based on the work by Alan Stern:
821 * http://sourceforge.net/mailarchive/forum.php?
822 * thread_id=5729457&forum_id=5398
824 struct usb_device_descriptor *desc;
826 struct usb_device *parent = dev->parent;
827 unsigned short portstatus;
829 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
830 * only 18 bytes long, this will terminate with a short packet. But if
831 * the maxpacket size is 8 or 16 the device may be waiting to transmit
832 * some more, or keeps on retransmitting the 8 byte header. */
834 desc = (struct usb_device_descriptor *)tmpbuf;
835 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
836 /* Default to 64 byte max packet size */
837 dev->maxpacketsize = PACKET_SIZE_64;
838 dev->epmaxpacketin[0] = 64;
839 dev->epmaxpacketout[0] = 64;
841 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
843 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
847 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
849 /* find the port number we're at */
853 for (j = 0; j < parent->maxchild; j++) {
854 if (parent->children[j] == dev) {
860 printf("usb_new_device:cannot locate device's port.\n");
864 /* reset the port for the second time */
865 err = hub_port_reset(dev->parent, port, &portstatus);
867 printf("\n Couldn't reset port %i\n", port);
873 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
874 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
875 switch (dev->descriptor.bMaxPacketSize0) {
877 dev->maxpacketsize = PACKET_SIZE_8;
880 dev->maxpacketsize = PACKET_SIZE_16;
883 dev->maxpacketsize = PACKET_SIZE_32;
886 dev->maxpacketsize = PACKET_SIZE_64;
891 err = usb_set_address(dev); /* set address */
894 printf("\n USB device not accepting new address " \
895 "(error=%lX)\n", dev->status);
899 wait_ms(10); /* Let the SET_ADDRESS settle */
901 tmp = sizeof(dev->descriptor);
903 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
904 &dev->descriptor, sizeof(dev->descriptor));
907 printf("unable to get device descriptor (error=%d)\n",
910 printf("USB device descriptor short read " \
911 "(expected %i, got %i)\n", tmp, err);
914 /* correct le values */
915 le16_to_cpus(&dev->descriptor.bcdUSB);
916 le16_to_cpus(&dev->descriptor.idVendor);
917 le16_to_cpus(&dev->descriptor.idProduct);
918 le16_to_cpus(&dev->descriptor.bcdDevice);
919 /* only support for one config for now */
920 usb_get_configuration_no(dev, &tmpbuf[0], 0);
921 usb_parse_config(dev, &tmpbuf[0], 0);
922 usb_set_maxpacket(dev);
923 /* we set the default configuration here */
924 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
925 printf("failed to set default configuration " \
926 "len %d, status %lX\n", dev->act_len, dev->status);
929 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
930 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
931 dev->descriptor.iSerialNumber);
932 memset(dev->mf, 0, sizeof(dev->mf));
933 memset(dev->prod, 0, sizeof(dev->prod));
934 memset(dev->serial, 0, sizeof(dev->serial));
935 if (dev->descriptor.iManufacturer)
936 usb_string(dev, dev->descriptor.iManufacturer,
937 dev->mf, sizeof(dev->mf));
938 if (dev->descriptor.iProduct)
939 usb_string(dev, dev->descriptor.iProduct,
940 dev->prod, sizeof(dev->prod));
941 if (dev->descriptor.iSerialNumber)
942 usb_string(dev, dev->descriptor.iSerialNumber,
943 dev->serial, sizeof(dev->serial));
944 USB_PRINTF("Manufacturer %s\n", dev->mf);
945 USB_PRINTF("Product %s\n", dev->prod);
946 USB_PRINTF("SerialNumber %s\n", dev->serial);
947 /* now prode if the device is a hub */
948 usb_hub_probe(dev, 0);
952 /* build device Tree */
953 static void usb_scan_devices(void)
956 struct usb_device *dev;
958 /* first make all devices unknown */
959 for (i = 0; i < USB_MAX_DEVICE; i++) {
960 memset(&usb_dev[i], 0, sizeof(struct usb_device));
961 usb_dev[i].devnum = -1;
964 /* device 0 is always present (root hub, so let it analyze) */
965 dev = usb_alloc_new_device();
966 if (usb_new_device(dev))
967 printf("No USB Device found\n");
969 printf("%d USB Device(s) found\n", dev_index);
970 /* insert "driver" if possible */
971 #ifdef CONFIG_USB_KEYBOARD
974 USB_PRINTF("scan end\n");