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;
77 char usb_started; /* flag for the started/stopped USB status */
79 /**********************************************************************
80 * some forward declerations...
82 static void usb_scan_devices(void);
84 /***********************************************************************
88 inline void wait_ms(unsigned long ms)
94 /***************************************************************************
106 /* init low_level USB */
108 result = usb_lowlevel_init();
109 /* if lowlevel init is OK, scan the bus for devices
110 * i.e. search HUBs and configure them */
112 printf("scanning bus for devices... ");
118 printf("Error, couldn't init Lowlevel part\n");
124 /******************************************************************************
125 * Stop USB this stops the LowLevel Part and deregisters USB devices.
135 res = usb_lowlevel_stop();
141 * disables the asynch behaviour of the control message. This is used for data
142 * transfers that uses the exclusiv access to the control and bulk messages.
143 * Returns the old value so it can be restored later.
145 int usb_disable_asynch(int disable)
147 int old_value = asynch_allowed;
149 asynch_allowed = !disable;
154 /*-------------------------------------------------------------------
160 * submits an Interrupt Message
162 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
163 void *buffer, int transfer_len, int interval)
165 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
169 * submits a control message and waits for comletion (at least timeout * 1ms)
170 * If timeout is 0, we don't wait for completion (used as example to set and
171 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
172 * allow control messages with 0 timeout, by previousely resetting the flag
173 * asynch_allowed (usb_disable_asynch(1)).
174 * returns the transfered length if OK or -1 if error. The transfered length
175 * and the current status are stored in the dev->act_len and dev->status.
177 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
178 unsigned char request, unsigned char requesttype,
179 unsigned short value, unsigned short index,
180 void *data, unsigned short size, int timeout)
182 struct devrequest setup_packet;
184 if ((timeout == 0) && (!asynch_allowed)) {
185 /* request for a asynch control pipe is not allowed */
189 /* set setup command */
190 setup_packet.requesttype = requesttype;
191 setup_packet.request = request;
192 setup_packet.value = cpu_to_le16(value);
193 setup_packet.index = cpu_to_le16(index);
194 setup_packet.length = cpu_to_le16(size);
195 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
196 "value 0x%X index 0x%X length 0x%X\n",
197 request, requesttype, value, index, size);
198 dev->status = USB_ST_NOT_PROC; /*not yet processed */
200 submit_control_msg(dev, pipe, data, size, &setup_packet);
205 * Wait for status to update until timeout expires, USB driver
206 * interrupt handler may set the status when the USB operation has
210 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
221 /*-------------------------------------------------------------------
222 * submits bulk message, and waits for completion. returns 0 if Ok or
224 * synchronous behavior
226 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
227 void *data, int len, int *actual_length, int timeout)
231 dev->status = USB_ST_NOT_PROC; /*not yet processed */
232 submit_bulk_msg(dev, pipe, data, len);
234 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
238 *actual_length = dev->act_len;
239 if (dev->status == 0)
246 /*-------------------------------------------------------------------
251 * returns the max packet size, depending on the pipe direction and
252 * the configurations values
254 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
256 /* direction is out -> use emaxpacket out */
257 if ((pipe & USB_DIR_IN) == 0)
258 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
260 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
264 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
265 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
266 * when it is inlined in 1 single routine. What happens is that the register r3
267 * is used as loop-count 'i', but gets overwritten later on.
268 * This is clearly a compiler bug, but it is easier to workaround it here than
269 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
270 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
272 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
274 static void __attribute__((noinline))
275 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
278 struct usb_endpoint_descriptor *ep;
279 u16 ep_wMaxPacketSize;
281 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
283 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
284 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
286 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
287 USB_ENDPOINT_XFER_CONTROL) {
288 /* Control => bidirectional */
289 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
290 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
291 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
292 b, dev->epmaxpacketin[b]);
294 if ((ep->bEndpointAddress & 0x80) == 0) {
296 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
297 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
298 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
299 b, dev->epmaxpacketout[b]);
303 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
304 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
305 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
306 b, dev->epmaxpacketin[b]);
313 * set the max packed value of all endpoints in the given configuration
315 static int usb_set_maxpacket(struct usb_device *dev)
319 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
320 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
321 usb_set_maxpacket_ep(dev, i, ii);
326 /*******************************************************************************
327 * Parse the config, located in buffer, and fills the dev->config structure.
328 * Note that all little/big endian swapping are done automatically.
330 static int usb_parse_config(struct usb_device *dev,
331 unsigned char *buffer, int cfgno)
333 struct usb_descriptor_header *head;
334 int index, ifno, epno, curr_if_num;
336 u16 ep_wMaxPacketSize;
342 dev->configno = cfgno;
343 head = (struct usb_descriptor_header *) &buffer[0];
344 if (head->bDescriptorType != USB_DT_CONFIG) {
345 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
346 head->bDescriptorType);
349 memcpy(&dev->config, buffer, buffer[0]);
350 le16_to_cpus(&(dev->config.desc.wTotalLength));
351 dev->config.no_of_if = 0;
353 index = dev->config.desc.bLength;
354 /* Ok the first entry must be a configuration entry,
355 * now process the others */
356 head = (struct usb_descriptor_header *) &buffer[index];
357 while (index + 1 < dev->config.desc.wTotalLength) {
358 switch (head->bDescriptorType) {
359 case USB_DT_INTERFACE:
360 if (((struct usb_interface_descriptor *) \
361 &buffer[index])->bInterfaceNumber != curr_if_num) {
362 /* this is a new interface, copy new desc */
363 ifno = dev->config.no_of_if;
364 dev->config.no_of_if++;
365 memcpy(&dev->config.if_desc[ifno],
366 &buffer[index], buffer[index]);
367 dev->config.if_desc[ifno].no_of_ep = 0;
368 dev->config.if_desc[ifno].num_altsetting = 1;
370 dev->config.if_desc[ifno].desc.bInterfaceNumber;
372 /* found alternate setting for the interface */
373 dev->config.if_desc[ifno].num_altsetting++;
376 case USB_DT_ENDPOINT:
377 epno = dev->config.if_desc[ifno].no_of_ep;
378 /* found an endpoint */
379 dev->config.if_desc[ifno].no_of_ep++;
380 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
381 &buffer[index], buffer[index]);
382 ep_wMaxPacketSize = get_unaligned(&dev->config.\
386 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
391 USB_PRINTF("if %d, ep %d\n", ifno, epno);
394 if (head->bLength == 0)
397 USB_PRINTF("unknown Description Type : %x\n",
398 head->bDescriptorType);
402 unsigned char *ch = (unsigned char *)head;
404 for (i = 0; i < head->bLength; i++)
405 USB_PRINTF("%02X ", *ch++);
406 USB_PRINTF("\n\n\n");
410 index += head->bLength;
411 head = (struct usb_descriptor_header *)&buffer[index];
416 /***********************************************************************
418 * endp: endpoint number in bits 0-3;
419 * direction flag in bit 7 (1 = IN, 0 = OUT)
421 int usb_clear_halt(struct usb_device *dev, int pipe)
424 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
426 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
427 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
428 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
430 /* don't clear if failed */
435 * NOTE: we do not get status and verify reset was successful
436 * as some devices are reported to lock up upon this check..
439 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
441 /* toggle is reset on clear */
442 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
447 /**********************************************************************
448 * get_descriptor type
450 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
451 unsigned char index, void *buf, int size)
454 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
455 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
456 (type << 8) + index, 0,
457 buf, size, USB_CNTL_TIMEOUT);
461 /**********************************************************************
462 * gets configuration cfgno and store it in the buffer
464 int usb_get_configuration_no(struct usb_device *dev,
465 unsigned char *buffer, int cfgno)
469 struct usb_configuration_descriptor *config;
471 config = (struct usb_configuration_descriptor *)&buffer[0];
472 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
475 printf("unable to get descriptor, error %lX\n",
478 printf("config descriptor too short " \
479 "(expected %i, got %i)\n", 9, result);
482 tmp = le16_to_cpu(config->wTotalLength);
484 if (tmp > USB_BUFSIZ) {
485 USB_PRINTF("usb_get_configuration_no: failed to get " \
486 "descriptor - too long: %d\n", tmp);
490 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
491 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
496 /********************************************************************
497 * set address of a device to the value in dev->devnum.
498 * This can only be done by addressing the device via the default address (0)
500 static int usb_set_address(struct usb_device *dev)
504 USB_PRINTF("set address %d\n", dev->devnum);
505 res = usb_control_msg(dev, usb_snddefctrl(dev),
506 USB_REQ_SET_ADDRESS, 0,
508 NULL, 0, USB_CNTL_TIMEOUT);
512 /********************************************************************
513 * set interface number to interface
515 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
517 struct usb_interface *if_face = NULL;
520 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
521 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
522 if_face = &dev->config.if_desc[i];
527 printf("selecting invalid interface %d", interface);
531 * We should return now for devices with only one alternate setting.
532 * According to 9.4.10 of the Universal Serial Bus Specification
533 * Revision 2.0 such devices can return with a STALL. This results in
534 * some USB sticks timeouting during initialization and then being
535 * unusable in U-Boot.
537 if (if_face->num_altsetting == 1)
540 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
541 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
542 alternate, interface, NULL, 0,
543 USB_CNTL_TIMEOUT * 5);
550 /********************************************************************
551 * set configuration number to configuration
553 static int usb_set_configuration(struct usb_device *dev, int configuration)
556 USB_PRINTF("set configuration %d\n", configuration);
557 /* set setup command */
558 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
559 USB_REQ_SET_CONFIGURATION, 0,
561 NULL, 0, USB_CNTL_TIMEOUT);
570 /********************************************************************
571 * set protocol to protocol
573 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
575 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
576 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
577 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
580 /********************************************************************
583 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
585 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
586 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
587 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
590 /********************************************************************
593 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
594 unsigned char id, void *buf, int size)
596 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
598 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
599 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
602 /********************************************************************
603 * get class descriptor
605 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
606 unsigned char type, unsigned char id, void *buf, int size)
608 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
609 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
610 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
613 /********************************************************************
614 * get string index in buffer
616 static int usb_get_string(struct usb_device *dev, unsigned short langid,
617 unsigned char index, void *buf, int size)
622 for (i = 0; i < 3; ++i) {
623 /* some devices are flaky */
624 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
625 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
626 (USB_DT_STRING << 8) + index, langid, buf, size,
637 static void usb_try_string_workarounds(unsigned char *buf, int *length)
639 int newlength, oldlength = *length;
641 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
642 if (!isprint(buf[newlength]) || buf[newlength + 1])
652 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
653 unsigned int index, unsigned char *buf)
657 /* Try to read the string descriptor by asking for the maximum
658 * possible number of bytes */
659 rc = usb_get_string(dev, langid, index, buf, 255);
661 /* If that failed try to read the descriptor length, then
662 * ask for just that many bytes */
664 rc = usb_get_string(dev, langid, index, buf, 2);
666 rc = usb_get_string(dev, langid, index, buf, buf[0]);
670 if (!buf[0] && !buf[1])
671 usb_try_string_workarounds(buf, &rc);
673 /* There might be extra junk at the end of the descriptor */
677 rc = rc - (rc & 1); /* force a multiple of two */
687 /********************************************************************
689 * Get string index and translate it to ascii.
690 * returns string length (> 0) or error (< 0)
692 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
694 unsigned char mybuf[USB_BUFSIZ];
699 if (size <= 0 || !buf || !index)
704 /* get langid for strings if it's not yet known */
705 if (!dev->have_langid) {
706 err = usb_string_sub(dev, 0, 0, tbuf);
708 USB_PRINTF("error getting string descriptor 0 " \
709 "(error=%lx)\n", dev->status);
711 } else if (tbuf[0] < 4) {
712 USB_PRINTF("string descriptor 0 too short\n");
715 dev->have_langid = -1;
716 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
717 /* always use the first langid listed */
718 USB_PRINTF("USB device number %d default " \
719 "language ID 0x%x\n",
720 dev->devnum, dev->string_langid);
724 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
728 size--; /* leave room for trailing NULL char in output buffer */
729 for (idx = 0, u = 2; u < err; u += 2) {
732 if (tbuf[u+1]) /* high byte */
733 buf[idx++] = '?'; /* non-ASCII character */
735 buf[idx++] = tbuf[u];
743 /********************************************************************
744 * USB device handling:
745 * the USB device are static allocated [USB_MAX_DEVICE].
749 /* returns a pointer to the device with the index [index].
750 * if the device is not assigned (dev->devnum==-1) returns NULL
752 struct usb_device *usb_get_dev_index(int index)
754 if (usb_dev[index].devnum == -1)
757 return &usb_dev[index];
761 /* returns a pointer of a new device structure or NULL, if
762 * no device struct is available
764 struct usb_device *usb_alloc_new_device(void)
767 USB_PRINTF("New Device %d\n", dev_index);
768 if (dev_index == USB_MAX_DEVICE) {
769 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
772 /* default Address is 0, real addresses start with 1 */
773 usb_dev[dev_index].devnum = dev_index + 1;
774 usb_dev[dev_index].maxchild = 0;
775 for (i = 0; i < USB_MAXCHILDREN; i++)
776 usb_dev[dev_index].children[i] = NULL;
777 usb_dev[dev_index].parent = NULL;
779 return &usb_dev[dev_index - 1];
784 * By the time we get here, the device has gotten a new device ID
785 * and is in the default state. We need to identify the thing and
786 * get the ball rolling..
788 * Returns 0 for success, != 0 for error.
790 int usb_new_device(struct usb_device *dev)
794 unsigned char tmpbuf[USB_BUFSIZ];
796 /* We still haven't set the Address yet */
800 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
801 /* this is the old and known way of initializing devices, it is
802 * different than what Windows and Linux are doing. Windows and Linux
803 * both retrieve 64 bytes while reading the device descriptor
804 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
805 * invalid header while reading 8 bytes as device descriptor. */
806 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
807 dev->maxpacketsize = PACKET_SIZE_8;
808 dev->epmaxpacketin[0] = 8;
809 dev->epmaxpacketout[0] = 8;
811 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
813 printf("\n USB device not responding, " \
814 "giving up (status=%lX)\n", dev->status);
818 /* This is a Windows scheme of initialization sequence, with double
819 * reset of the device (Linux uses the same sequence)
820 * Some equipment is said to work only with such init sequence; this
821 * patch is based on the work by Alan Stern:
822 * http://sourceforge.net/mailarchive/forum.php?
823 * thread_id=5729457&forum_id=5398
825 struct usb_device_descriptor *desc;
827 struct usb_device *parent = dev->parent;
828 unsigned short portstatus;
830 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
831 * only 18 bytes long, this will terminate with a short packet. But if
832 * the maxpacket size is 8 or 16 the device may be waiting to transmit
833 * some more, or keeps on retransmitting the 8 byte header. */
835 desc = (struct usb_device_descriptor *)tmpbuf;
836 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
837 /* Default to 64 byte max packet size */
838 dev->maxpacketsize = PACKET_SIZE_64;
839 dev->epmaxpacketin[0] = 64;
840 dev->epmaxpacketout[0] = 64;
842 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
844 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
848 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
850 /* find the port number we're at */
854 for (j = 0; j < parent->maxchild; j++) {
855 if (parent->children[j] == dev) {
861 printf("usb_new_device:cannot locate device's port.\n");
865 /* reset the port for the second time */
866 err = hub_port_reset(dev->parent, port, &portstatus);
868 printf("\n Couldn't reset port %i\n", port);
874 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
875 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
876 switch (dev->descriptor.bMaxPacketSize0) {
878 dev->maxpacketsize = PACKET_SIZE_8;
881 dev->maxpacketsize = PACKET_SIZE_16;
884 dev->maxpacketsize = PACKET_SIZE_32;
887 dev->maxpacketsize = PACKET_SIZE_64;
892 err = usb_set_address(dev); /* set address */
895 printf("\n USB device not accepting new address " \
896 "(error=%lX)\n", dev->status);
900 wait_ms(10); /* Let the SET_ADDRESS settle */
902 tmp = sizeof(dev->descriptor);
904 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
905 &dev->descriptor, sizeof(dev->descriptor));
908 printf("unable to get device descriptor (error=%d)\n",
911 printf("USB device descriptor short read " \
912 "(expected %i, got %i)\n", tmp, err);
915 /* correct le values */
916 le16_to_cpus(&dev->descriptor.bcdUSB);
917 le16_to_cpus(&dev->descriptor.idVendor);
918 le16_to_cpus(&dev->descriptor.idProduct);
919 le16_to_cpus(&dev->descriptor.bcdDevice);
920 /* only support for one config for now */
921 usb_get_configuration_no(dev, &tmpbuf[0], 0);
922 usb_parse_config(dev, &tmpbuf[0], 0);
923 usb_set_maxpacket(dev);
924 /* we set the default configuration here */
925 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
926 printf("failed to set default configuration " \
927 "len %d, status %lX\n", dev->act_len, dev->status);
930 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
931 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
932 dev->descriptor.iSerialNumber);
933 memset(dev->mf, 0, sizeof(dev->mf));
934 memset(dev->prod, 0, sizeof(dev->prod));
935 memset(dev->serial, 0, sizeof(dev->serial));
936 if (dev->descriptor.iManufacturer)
937 usb_string(dev, dev->descriptor.iManufacturer,
938 dev->mf, sizeof(dev->mf));
939 if (dev->descriptor.iProduct)
940 usb_string(dev, dev->descriptor.iProduct,
941 dev->prod, sizeof(dev->prod));
942 if (dev->descriptor.iSerialNumber)
943 usb_string(dev, dev->descriptor.iSerialNumber,
944 dev->serial, sizeof(dev->serial));
945 USB_PRINTF("Manufacturer %s\n", dev->mf);
946 USB_PRINTF("Product %s\n", dev->prod);
947 USB_PRINTF("SerialNumber %s\n", dev->serial);
948 /* now prode if the device is a hub */
949 usb_hub_probe(dev, 0);
953 /* build device Tree */
954 static void usb_scan_devices(void)
957 struct usb_device *dev;
959 /* first make all devices unknown */
960 for (i = 0; i < USB_MAX_DEVICE; i++) {
961 memset(&usb_dev[i], 0, sizeof(struct usb_device));
962 usb_dev[i].devnum = -1;
965 /* device 0 is always present (root hub, so let it analyze) */
966 dev = usb_alloc_new_device();
967 if (usb_new_device(dev))
968 printf("No USB Device found\n");
970 printf("%d USB Device(s) found\n", dev_index);
971 /* insert "driver" if possible */
972 #ifdef CONFIG_USB_KEYBOARD
975 USB_PRINTF("scan end\n");