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 /***************************************************************************
96 /* init low_level USB */
98 result = usb_lowlevel_init();
99 /* if lowlevel init is OK, scan the bus for devices
100 * i.e. search HUBs and configure them */
102 printf("scanning bus for devices... ");
108 printf("Error, couldn't init Lowlevel part\n");
114 /******************************************************************************
115 * Stop USB this stops the LowLevel Part and deregisters USB devices.
125 res = usb_lowlevel_stop();
131 * disables the asynch behaviour of the control message. This is used for data
132 * transfers that uses the exclusiv access to the control and bulk messages.
133 * Returns the old value so it can be restored later.
135 int usb_disable_asynch(int disable)
137 int old_value = asynch_allowed;
139 asynch_allowed = !disable;
144 /*-------------------------------------------------------------------
150 * submits an Interrupt Message
152 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
153 void *buffer, int transfer_len, int interval)
155 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
159 * submits a control message and waits for comletion (at least timeout * 1ms)
160 * If timeout is 0, we don't wait for completion (used as example to set and
161 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
162 * allow control messages with 0 timeout, by previousely resetting the flag
163 * asynch_allowed (usb_disable_asynch(1)).
164 * returns the transfered length if OK or -1 if error. The transfered length
165 * and the current status are stored in the dev->act_len and dev->status.
167 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
168 unsigned char request, unsigned char requesttype,
169 unsigned short value, unsigned short index,
170 void *data, unsigned short size, int timeout)
172 struct devrequest setup_packet;
174 if ((timeout == 0) && (!asynch_allowed)) {
175 /* request for a asynch control pipe is not allowed */
179 /* set setup command */
180 setup_packet.requesttype = requesttype;
181 setup_packet.request = request;
182 setup_packet.value = cpu_to_le16(value);
183 setup_packet.index = cpu_to_le16(index);
184 setup_packet.length = cpu_to_le16(size);
185 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
186 "value 0x%X index 0x%X length 0x%X\n",
187 request, requesttype, value, index, size);
188 dev->status = USB_ST_NOT_PROC; /*not yet processed */
190 submit_control_msg(dev, pipe, data, size, &setup_packet);
195 * Wait for status to update until timeout expires, USB driver
196 * interrupt handler may set the status when the USB operation has
200 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
211 /*-------------------------------------------------------------------
212 * submits bulk message, and waits for completion. returns 0 if Ok or
214 * synchronous behavior
216 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
217 void *data, int len, int *actual_length, int timeout)
221 dev->status = USB_ST_NOT_PROC; /*not yet processed */
222 submit_bulk_msg(dev, pipe, data, len);
224 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
228 *actual_length = dev->act_len;
229 if (dev->status == 0)
236 /*-------------------------------------------------------------------
241 * returns the max packet size, depending on the pipe direction and
242 * the configurations values
244 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
246 /* direction is out -> use emaxpacket out */
247 if ((pipe & USB_DIR_IN) == 0)
248 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
250 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
254 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
255 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
256 * when it is inlined in 1 single routine. What happens is that the register r3
257 * is used as loop-count 'i', but gets overwritten later on.
258 * This is clearly a compiler bug, but it is easier to workaround it here than
259 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
260 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
262 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
264 static void __attribute__((noinline))
265 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
268 struct usb_endpoint_descriptor *ep;
269 u16 ep_wMaxPacketSize;
271 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
273 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
274 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
276 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
277 USB_ENDPOINT_XFER_CONTROL) {
278 /* Control => bidirectional */
279 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
280 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
281 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
282 b, dev->epmaxpacketin[b]);
284 if ((ep->bEndpointAddress & 0x80) == 0) {
286 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
287 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
288 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
289 b, dev->epmaxpacketout[b]);
293 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
294 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
295 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
296 b, dev->epmaxpacketin[b]);
303 * set the max packed value of all endpoints in the given configuration
305 static int usb_set_maxpacket(struct usb_device *dev)
309 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
310 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
311 usb_set_maxpacket_ep(dev, i, ii);
316 /*******************************************************************************
317 * Parse the config, located in buffer, and fills the dev->config structure.
318 * Note that all little/big endian swapping are done automatically.
320 static int usb_parse_config(struct usb_device *dev,
321 unsigned char *buffer, int cfgno)
323 struct usb_descriptor_header *head;
324 int index, ifno, epno, curr_if_num;
326 u16 ep_wMaxPacketSize;
332 dev->configno = cfgno;
333 head = (struct usb_descriptor_header *) &buffer[0];
334 if (head->bDescriptorType != USB_DT_CONFIG) {
335 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
336 head->bDescriptorType);
339 memcpy(&dev->config, buffer, buffer[0]);
340 le16_to_cpus(&(dev->config.desc.wTotalLength));
341 dev->config.no_of_if = 0;
343 index = dev->config.desc.bLength;
344 /* Ok the first entry must be a configuration entry,
345 * now process the others */
346 head = (struct usb_descriptor_header *) &buffer[index];
347 while (index + 1 < dev->config.desc.wTotalLength) {
348 switch (head->bDescriptorType) {
349 case USB_DT_INTERFACE:
350 if (((struct usb_interface_descriptor *) \
351 &buffer[index])->bInterfaceNumber != curr_if_num) {
352 /* this is a new interface, copy new desc */
353 ifno = dev->config.no_of_if;
354 dev->config.no_of_if++;
355 memcpy(&dev->config.if_desc[ifno],
356 &buffer[index], buffer[index]);
357 dev->config.if_desc[ifno].no_of_ep = 0;
358 dev->config.if_desc[ifno].num_altsetting = 1;
360 dev->config.if_desc[ifno].desc.bInterfaceNumber;
362 /* found alternate setting for the interface */
363 dev->config.if_desc[ifno].num_altsetting++;
366 case USB_DT_ENDPOINT:
367 epno = dev->config.if_desc[ifno].no_of_ep;
368 /* found an endpoint */
369 dev->config.if_desc[ifno].no_of_ep++;
370 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
371 &buffer[index], buffer[index]);
372 ep_wMaxPacketSize = get_unaligned(&dev->config.\
376 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
381 USB_PRINTF("if %d, ep %d\n", ifno, epno);
384 if (head->bLength == 0)
387 USB_PRINTF("unknown Description Type : %x\n",
388 head->bDescriptorType);
392 unsigned char *ch = (unsigned char *)head;
394 for (i = 0; i < head->bLength; i++)
395 USB_PRINTF("%02X ", *ch++);
396 USB_PRINTF("\n\n\n");
400 index += head->bLength;
401 head = (struct usb_descriptor_header *)&buffer[index];
406 /***********************************************************************
408 * endp: endpoint number in bits 0-3;
409 * direction flag in bit 7 (1 = IN, 0 = OUT)
411 int usb_clear_halt(struct usb_device *dev, int pipe)
414 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
416 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
417 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
418 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
420 /* don't clear if failed */
425 * NOTE: we do not get status and verify reset was successful
426 * as some devices are reported to lock up upon this check..
429 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
431 /* toggle is reset on clear */
432 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
437 /**********************************************************************
438 * get_descriptor type
440 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
441 unsigned char index, void *buf, int size)
444 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
445 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
446 (type << 8) + index, 0,
447 buf, size, USB_CNTL_TIMEOUT);
451 /**********************************************************************
452 * gets configuration cfgno and store it in the buffer
454 int usb_get_configuration_no(struct usb_device *dev,
455 unsigned char *buffer, int cfgno)
459 struct usb_configuration_descriptor *config;
461 config = (struct usb_configuration_descriptor *)&buffer[0];
462 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
465 printf("unable to get descriptor, error %lX\n",
468 printf("config descriptor too short " \
469 "(expected %i, got %i)\n", 9, result);
472 tmp = le16_to_cpu(config->wTotalLength);
474 if (tmp > USB_BUFSIZ) {
475 USB_PRINTF("usb_get_configuration_no: failed to get " \
476 "descriptor - too long: %d\n", tmp);
480 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
481 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
486 /********************************************************************
487 * set address of a device to the value in dev->devnum.
488 * This can only be done by addressing the device via the default address (0)
490 static int usb_set_address(struct usb_device *dev)
494 USB_PRINTF("set address %d\n", dev->devnum);
495 res = usb_control_msg(dev, usb_snddefctrl(dev),
496 USB_REQ_SET_ADDRESS, 0,
498 NULL, 0, USB_CNTL_TIMEOUT);
502 /********************************************************************
503 * set interface number to interface
505 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
507 struct usb_interface *if_face = NULL;
510 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
511 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
512 if_face = &dev->config.if_desc[i];
517 printf("selecting invalid interface %d", interface);
521 * We should return now for devices with only one alternate setting.
522 * According to 9.4.10 of the Universal Serial Bus Specification
523 * Revision 2.0 such devices can return with a STALL. This results in
524 * some USB sticks timeouting during initialization and then being
525 * unusable in U-Boot.
527 if (if_face->num_altsetting == 1)
530 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
531 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
532 alternate, interface, NULL, 0,
533 USB_CNTL_TIMEOUT * 5);
540 /********************************************************************
541 * set configuration number to configuration
543 static int usb_set_configuration(struct usb_device *dev, int configuration)
546 USB_PRINTF("set configuration %d\n", configuration);
547 /* set setup command */
548 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
549 USB_REQ_SET_CONFIGURATION, 0,
551 NULL, 0, USB_CNTL_TIMEOUT);
560 /********************************************************************
561 * set protocol to protocol
563 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
565 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
566 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
567 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
570 /********************************************************************
573 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
575 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
576 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
577 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
580 /********************************************************************
583 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
584 unsigned char id, void *buf, int size)
586 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
588 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
589 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
592 /********************************************************************
593 * get class descriptor
595 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
596 unsigned char type, unsigned char id, void *buf, int size)
598 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
599 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
600 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
603 /********************************************************************
604 * get string index in buffer
606 static int usb_get_string(struct usb_device *dev, unsigned short langid,
607 unsigned char index, void *buf, int size)
612 for (i = 0; i < 3; ++i) {
613 /* some devices are flaky */
614 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
615 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
616 (USB_DT_STRING << 8) + index, langid, buf, size,
627 static void usb_try_string_workarounds(unsigned char *buf, int *length)
629 int newlength, oldlength = *length;
631 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
632 if (!isprint(buf[newlength]) || buf[newlength + 1])
642 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
643 unsigned int index, unsigned char *buf)
647 /* Try to read the string descriptor by asking for the maximum
648 * possible number of bytes */
649 rc = usb_get_string(dev, langid, index, buf, 255);
651 /* If that failed try to read the descriptor length, then
652 * ask for just that many bytes */
654 rc = usb_get_string(dev, langid, index, buf, 2);
656 rc = usb_get_string(dev, langid, index, buf, buf[0]);
660 if (!buf[0] && !buf[1])
661 usb_try_string_workarounds(buf, &rc);
663 /* There might be extra junk at the end of the descriptor */
667 rc = rc - (rc & 1); /* force a multiple of two */
677 /********************************************************************
679 * Get string index and translate it to ascii.
680 * returns string length (> 0) or error (< 0)
682 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
684 unsigned char mybuf[USB_BUFSIZ];
689 if (size <= 0 || !buf || !index)
694 /* get langid for strings if it's not yet known */
695 if (!dev->have_langid) {
696 err = usb_string_sub(dev, 0, 0, tbuf);
698 USB_PRINTF("error getting string descriptor 0 " \
699 "(error=%lx)\n", dev->status);
701 } else if (tbuf[0] < 4) {
702 USB_PRINTF("string descriptor 0 too short\n");
705 dev->have_langid = -1;
706 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
707 /* always use the first langid listed */
708 USB_PRINTF("USB device number %d default " \
709 "language ID 0x%x\n",
710 dev->devnum, dev->string_langid);
714 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
718 size--; /* leave room for trailing NULL char in output buffer */
719 for (idx = 0, u = 2; u < err; u += 2) {
722 if (tbuf[u+1]) /* high byte */
723 buf[idx++] = '?'; /* non-ASCII character */
725 buf[idx++] = tbuf[u];
733 /********************************************************************
734 * USB device handling:
735 * the USB device are static allocated [USB_MAX_DEVICE].
739 /* returns a pointer to the device with the index [index].
740 * if the device is not assigned (dev->devnum==-1) returns NULL
742 struct usb_device *usb_get_dev_index(int index)
744 if (usb_dev[index].devnum == -1)
747 return &usb_dev[index];
751 /* returns a pointer of a new device structure or NULL, if
752 * no device struct is available
754 struct usb_device *usb_alloc_new_device(void)
757 USB_PRINTF("New Device %d\n", dev_index);
758 if (dev_index == USB_MAX_DEVICE) {
759 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
762 /* default Address is 0, real addresses start with 1 */
763 usb_dev[dev_index].devnum = dev_index + 1;
764 usb_dev[dev_index].maxchild = 0;
765 for (i = 0; i < USB_MAXCHILDREN; i++)
766 usb_dev[dev_index].children[i] = NULL;
767 usb_dev[dev_index].parent = NULL;
769 return &usb_dev[dev_index - 1];
774 * By the time we get here, the device has gotten a new device ID
775 * and is in the default state. We need to identify the thing and
776 * get the ball rolling..
778 * Returns 0 for success, != 0 for error.
780 int usb_new_device(struct usb_device *dev)
784 unsigned char tmpbuf[USB_BUFSIZ];
786 /* We still haven't set the Address yet */
790 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
791 /* this is the old and known way of initializing devices, it is
792 * different than what Windows and Linux are doing. Windows and Linux
793 * both retrieve 64 bytes while reading the device descriptor
794 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
795 * invalid header while reading 8 bytes as device descriptor. */
796 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
797 dev->maxpacketsize = PACKET_SIZE_8;
798 dev->epmaxpacketin[0] = 8;
799 dev->epmaxpacketout[0] = 8;
801 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
803 printf("\n USB device not responding, " \
804 "giving up (status=%lX)\n", dev->status);
808 /* This is a Windows scheme of initialization sequence, with double
809 * reset of the device (Linux uses the same sequence)
810 * Some equipment is said to work only with such init sequence; this
811 * patch is based on the work by Alan Stern:
812 * http://sourceforge.net/mailarchive/forum.php?
813 * thread_id=5729457&forum_id=5398
815 struct usb_device_descriptor *desc;
817 struct usb_device *parent = dev->parent;
818 unsigned short portstatus;
820 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
821 * only 18 bytes long, this will terminate with a short packet. But if
822 * the maxpacket size is 8 or 16 the device may be waiting to transmit
823 * some more, or keeps on retransmitting the 8 byte header. */
825 desc = (struct usb_device_descriptor *)tmpbuf;
826 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
827 /* Default to 64 byte max packet size */
828 dev->maxpacketsize = PACKET_SIZE_64;
829 dev->epmaxpacketin[0] = 64;
830 dev->epmaxpacketout[0] = 64;
832 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
834 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
838 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
840 /* find the port number we're at */
844 for (j = 0; j < parent->maxchild; j++) {
845 if (parent->children[j] == dev) {
851 printf("usb_new_device:cannot locate device's port.\n");
855 /* reset the port for the second time */
856 err = hub_port_reset(dev->parent, port, &portstatus);
858 printf("\n Couldn't reset port %i\n", port);
864 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
865 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
866 switch (dev->descriptor.bMaxPacketSize0) {
868 dev->maxpacketsize = PACKET_SIZE_8;
871 dev->maxpacketsize = PACKET_SIZE_16;
874 dev->maxpacketsize = PACKET_SIZE_32;
877 dev->maxpacketsize = PACKET_SIZE_64;
882 err = usb_set_address(dev); /* set address */
885 printf("\n USB device not accepting new address " \
886 "(error=%lX)\n", dev->status);
890 mdelay(10); /* Let the SET_ADDRESS settle */
892 tmp = sizeof(dev->descriptor);
894 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
895 &dev->descriptor, sizeof(dev->descriptor));
898 printf("unable to get device descriptor (error=%d)\n",
901 printf("USB device descriptor short read " \
902 "(expected %i, got %i)\n", tmp, err);
905 /* correct le values */
906 le16_to_cpus(&dev->descriptor.bcdUSB);
907 le16_to_cpus(&dev->descriptor.idVendor);
908 le16_to_cpus(&dev->descriptor.idProduct);
909 le16_to_cpus(&dev->descriptor.bcdDevice);
910 /* only support for one config for now */
911 usb_get_configuration_no(dev, &tmpbuf[0], 0);
912 usb_parse_config(dev, &tmpbuf[0], 0);
913 usb_set_maxpacket(dev);
914 /* we set the default configuration here */
915 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
916 printf("failed to set default configuration " \
917 "len %d, status %lX\n", dev->act_len, dev->status);
920 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
921 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
922 dev->descriptor.iSerialNumber);
923 memset(dev->mf, 0, sizeof(dev->mf));
924 memset(dev->prod, 0, sizeof(dev->prod));
925 memset(dev->serial, 0, sizeof(dev->serial));
926 if (dev->descriptor.iManufacturer)
927 usb_string(dev, dev->descriptor.iManufacturer,
928 dev->mf, sizeof(dev->mf));
929 if (dev->descriptor.iProduct)
930 usb_string(dev, dev->descriptor.iProduct,
931 dev->prod, sizeof(dev->prod));
932 if (dev->descriptor.iSerialNumber)
933 usb_string(dev, dev->descriptor.iSerialNumber,
934 dev->serial, sizeof(dev->serial));
935 USB_PRINTF("Manufacturer %s\n", dev->mf);
936 USB_PRINTF("Product %s\n", dev->prod);
937 USB_PRINTF("SerialNumber %s\n", dev->serial);
938 /* now prode if the device is a hub */
939 usb_hub_probe(dev, 0);
943 /* build device Tree */
944 static void usb_scan_devices(void)
947 struct usb_device *dev;
949 /* first make all devices unknown */
950 for (i = 0; i < USB_MAX_DEVICE; i++) {
951 memset(&usb_dev[i], 0, sizeof(struct usb_device));
952 usb_dev[i].devnum = -1;
955 /* device 0 is always present (root hub, so let it analyze) */
956 dev = usb_alloc_new_device();
957 if (usb_new_device(dev))
958 printf("No USB Device found\n");
960 printf("%d USB Device(s) found\n", dev_index);
961 /* insert "driver" if possible */
962 #ifdef CONFIG_USB_KEYBOARD
965 USB_PRINTF("scan end\n");