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/compiler.h>
51 #include <linux/ctype.h>
52 #include <asm/byteorder.h>
53 #include <asm/unaligned.h>
57 #include <asm/4xx_pci.h>
62 #define USB_HUB_DEBUG 1
65 #define USB_HUB_DEBUG 0
68 #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args)
69 #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args)
71 #define USB_BUFSIZ 512
73 static struct usb_device usb_dev[USB_MAX_DEVICE];
76 static int asynch_allowed;
78 char usb_started; /* flag for the started/stopped USB status */
80 /**********************************************************************
81 * some forward declerations...
83 static void usb_scan_devices(void);
85 /***************************************************************************
97 /* init low_level USB */
99 result = usb_lowlevel_init();
100 /* if lowlevel init is OK, scan the bus for devices
101 * i.e. search HUBs and configure them */
103 printf("scanning bus for devices... ");
109 printf("Error, couldn't init Lowlevel part\n");
115 /******************************************************************************
116 * Stop USB this stops the LowLevel Part and deregisters USB devices.
126 res = usb_lowlevel_stop();
132 * disables the asynch behaviour of the control message. This is used for data
133 * transfers that uses the exclusiv access to the control and bulk messages.
134 * Returns the old value so it can be restored later.
136 int usb_disable_asynch(int disable)
138 int old_value = asynch_allowed;
140 asynch_allowed = !disable;
145 /*-------------------------------------------------------------------
151 * submits an Interrupt Message
153 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
154 void *buffer, int transfer_len, int interval)
156 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
160 * submits a control message and waits for comletion (at least timeout * 1ms)
161 * If timeout is 0, we don't wait for completion (used as example to set and
162 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
163 * allow control messages with 0 timeout, by previousely resetting the flag
164 * asynch_allowed (usb_disable_asynch(1)).
165 * returns the transfered length if OK or -1 if error. The transfered length
166 * and the current status are stored in the dev->act_len and dev->status.
168 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
169 unsigned char request, unsigned char requesttype,
170 unsigned short value, unsigned short index,
171 void *data, unsigned short size, int timeout)
173 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
175 if ((timeout == 0) && (!asynch_allowed)) {
176 /* request for a asynch control pipe is not allowed */
180 /* set setup command */
181 setup_packet->requesttype = requesttype;
182 setup_packet->request = request;
183 setup_packet->value = cpu_to_le16(value);
184 setup_packet->index = cpu_to_le16(index);
185 setup_packet->length = cpu_to_le16(size);
186 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
187 "value 0x%X index 0x%X length 0x%X\n",
188 request, requesttype, value, index, size);
189 dev->status = USB_ST_NOT_PROC; /*not yet processed */
191 submit_control_msg(dev, pipe, data, size, setup_packet);
196 * Wait for status to update until timeout expires, USB driver
197 * interrupt handler may set the status when the USB operation has
201 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
212 /*-------------------------------------------------------------------
213 * submits bulk message, and waits for completion. returns 0 if Ok or
215 * synchronous behavior
217 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
218 void *data, int len, int *actual_length, int timeout)
222 dev->status = USB_ST_NOT_PROC; /*not yet processed */
223 submit_bulk_msg(dev, pipe, data, len);
225 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
229 *actual_length = dev->act_len;
230 if (dev->status == 0)
237 /*-------------------------------------------------------------------
242 * returns the max packet size, depending on the pipe direction and
243 * the configurations values
245 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
247 /* direction is out -> use emaxpacket out */
248 if ((pipe & USB_DIR_IN) == 0)
249 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
251 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
255 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
256 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
257 * when it is inlined in 1 single routine. What happens is that the register r3
258 * is used as loop-count 'i', but gets overwritten later on.
259 * This is clearly a compiler bug, but it is easier to workaround it here than
260 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
261 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
263 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
266 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
269 struct usb_endpoint_descriptor *ep;
270 u16 ep_wMaxPacketSize;
272 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
274 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
275 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
277 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
278 USB_ENDPOINT_XFER_CONTROL) {
279 /* Control => bidirectional */
280 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
281 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
282 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
283 b, dev->epmaxpacketin[b]);
285 if ((ep->bEndpointAddress & 0x80) == 0) {
287 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
288 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
289 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
290 b, dev->epmaxpacketout[b]);
294 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
295 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
296 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
297 b, dev->epmaxpacketin[b]);
304 * set the max packed value of all endpoints in the given configuration
306 static int usb_set_maxpacket(struct usb_device *dev)
310 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
311 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
312 usb_set_maxpacket_ep(dev, i, ii);
317 /*******************************************************************************
318 * Parse the config, located in buffer, and fills the dev->config structure.
319 * Note that all little/big endian swapping are done automatically.
321 static int usb_parse_config(struct usb_device *dev,
322 unsigned char *buffer, int cfgno)
324 struct usb_descriptor_header *head;
325 int index, ifno, epno, curr_if_num;
327 u16 ep_wMaxPacketSize;
333 dev->configno = cfgno;
334 head = (struct usb_descriptor_header *) &buffer[0];
335 if (head->bDescriptorType != USB_DT_CONFIG) {
336 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
337 head->bDescriptorType);
340 memcpy(&dev->config, buffer, buffer[0]);
341 le16_to_cpus(&(dev->config.desc.wTotalLength));
342 dev->config.no_of_if = 0;
344 index = dev->config.desc.bLength;
345 /* Ok the first entry must be a configuration entry,
346 * now process the others */
347 head = (struct usb_descriptor_header *) &buffer[index];
348 while (index + 1 < dev->config.desc.wTotalLength) {
349 switch (head->bDescriptorType) {
350 case USB_DT_INTERFACE:
351 if (((struct usb_interface_descriptor *) \
352 &buffer[index])->bInterfaceNumber != curr_if_num) {
353 /* this is a new interface, copy new desc */
354 ifno = dev->config.no_of_if;
355 dev->config.no_of_if++;
356 memcpy(&dev->config.if_desc[ifno],
357 &buffer[index], buffer[index]);
358 dev->config.if_desc[ifno].no_of_ep = 0;
359 dev->config.if_desc[ifno].num_altsetting = 1;
361 dev->config.if_desc[ifno].desc.bInterfaceNumber;
363 /* found alternate setting for the interface */
364 dev->config.if_desc[ifno].num_altsetting++;
367 case USB_DT_ENDPOINT:
368 epno = dev->config.if_desc[ifno].no_of_ep;
369 /* found an endpoint */
370 dev->config.if_desc[ifno].no_of_ep++;
371 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
372 &buffer[index], buffer[index]);
373 ep_wMaxPacketSize = get_unaligned(&dev->config.\
377 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
382 USB_PRINTF("if %d, ep %d\n", ifno, epno);
385 if (head->bLength == 0)
388 USB_PRINTF("unknown Description Type : %x\n",
389 head->bDescriptorType);
393 unsigned char *ch = (unsigned char *)head;
395 for (i = 0; i < head->bLength; i++)
396 USB_PRINTF("%02X ", *ch++);
397 USB_PRINTF("\n\n\n");
401 index += head->bLength;
402 head = (struct usb_descriptor_header *)&buffer[index];
407 /***********************************************************************
409 * endp: endpoint number in bits 0-3;
410 * direction flag in bit 7 (1 = IN, 0 = OUT)
412 int usb_clear_halt(struct usb_device *dev, int pipe)
415 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
417 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
418 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
419 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
421 /* don't clear if failed */
426 * NOTE: we do not get status and verify reset was successful
427 * as some devices are reported to lock up upon this check..
430 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
432 /* toggle is reset on clear */
433 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
438 /**********************************************************************
439 * get_descriptor type
441 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
442 unsigned char index, void *buf, int size)
445 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
446 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
447 (type << 8) + index, 0,
448 buf, size, USB_CNTL_TIMEOUT);
452 /**********************************************************************
453 * gets configuration cfgno and store it in the buffer
455 int usb_get_configuration_no(struct usb_device *dev,
456 unsigned char *buffer, int cfgno)
460 struct usb_configuration_descriptor *config;
462 config = (struct usb_configuration_descriptor *)&buffer[0];
463 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
466 printf("unable to get descriptor, error %lX\n",
469 printf("config descriptor too short " \
470 "(expected %i, got %i)\n", 9, result);
473 tmp = le16_to_cpu(config->wTotalLength);
475 if (tmp > USB_BUFSIZ) {
476 USB_PRINTF("usb_get_configuration_no: failed to get " \
477 "descriptor - too long: %d\n", tmp);
481 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
482 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
487 /********************************************************************
488 * set address of a device to the value in dev->devnum.
489 * This can only be done by addressing the device via the default address (0)
491 static int usb_set_address(struct usb_device *dev)
495 USB_PRINTF("set address %d\n", dev->devnum);
496 res = usb_control_msg(dev, usb_snddefctrl(dev),
497 USB_REQ_SET_ADDRESS, 0,
499 NULL, 0, USB_CNTL_TIMEOUT);
503 /********************************************************************
504 * set interface number to interface
506 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
508 struct usb_interface *if_face = NULL;
511 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
512 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
513 if_face = &dev->config.if_desc[i];
518 printf("selecting invalid interface %d", interface);
522 * We should return now for devices with only one alternate setting.
523 * According to 9.4.10 of the Universal Serial Bus Specification
524 * Revision 2.0 such devices can return with a STALL. This results in
525 * some USB sticks timeouting during initialization and then being
526 * unusable in U-Boot.
528 if (if_face->num_altsetting == 1)
531 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
532 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
533 alternate, interface, NULL, 0,
534 USB_CNTL_TIMEOUT * 5);
541 /********************************************************************
542 * set configuration number to configuration
544 static int usb_set_configuration(struct usb_device *dev, int configuration)
547 USB_PRINTF("set configuration %d\n", configuration);
548 /* set setup command */
549 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
550 USB_REQ_SET_CONFIGURATION, 0,
552 NULL, 0, USB_CNTL_TIMEOUT);
561 /********************************************************************
562 * set protocol to protocol
564 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
566 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
567 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
568 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
571 /********************************************************************
574 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
576 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
577 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
578 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
581 /********************************************************************
584 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
585 unsigned char id, void *buf, int size)
587 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
589 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
590 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
593 /********************************************************************
594 * get class descriptor
596 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
597 unsigned char type, unsigned char id, void *buf, int size)
599 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
600 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
601 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
604 /********************************************************************
605 * get string index in buffer
607 static int usb_get_string(struct usb_device *dev, unsigned short langid,
608 unsigned char index, void *buf, int size)
613 for (i = 0; i < 3; ++i) {
614 /* some devices are flaky */
615 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
616 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
617 (USB_DT_STRING << 8) + index, langid, buf, size,
628 static void usb_try_string_workarounds(unsigned char *buf, int *length)
630 int newlength, oldlength = *length;
632 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
633 if (!isprint(buf[newlength]) || buf[newlength + 1])
643 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
644 unsigned int index, unsigned char *buf)
648 /* Try to read the string descriptor by asking for the maximum
649 * possible number of bytes */
650 rc = usb_get_string(dev, langid, index, buf, 255);
652 /* If that failed try to read the descriptor length, then
653 * ask for just that many bytes */
655 rc = usb_get_string(dev, langid, index, buf, 2);
657 rc = usb_get_string(dev, langid, index, buf, buf[0]);
661 if (!buf[0] && !buf[1])
662 usb_try_string_workarounds(buf, &rc);
664 /* There might be extra junk at the end of the descriptor */
668 rc = rc - (rc & 1); /* force a multiple of two */
678 /********************************************************************
680 * Get string index and translate it to ascii.
681 * returns string length (> 0) or error (< 0)
683 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
685 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
690 if (size <= 0 || !buf || !index)
695 /* get langid for strings if it's not yet known */
696 if (!dev->have_langid) {
697 err = usb_string_sub(dev, 0, 0, tbuf);
699 USB_PRINTF("error getting string descriptor 0 " \
700 "(error=%lx)\n", dev->status);
702 } else if (tbuf[0] < 4) {
703 USB_PRINTF("string descriptor 0 too short\n");
706 dev->have_langid = -1;
707 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
708 /* always use the first langid listed */
709 USB_PRINTF("USB device number %d default " \
710 "language ID 0x%x\n",
711 dev->devnum, dev->string_langid);
715 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
719 size--; /* leave room for trailing NULL char in output buffer */
720 for (idx = 0, u = 2; u < err; u += 2) {
723 if (tbuf[u+1]) /* high byte */
724 buf[idx++] = '?'; /* non-ASCII character */
726 buf[idx++] = tbuf[u];
734 /********************************************************************
735 * USB device handling:
736 * the USB device are static allocated [USB_MAX_DEVICE].
740 /* returns a pointer to the device with the index [index].
741 * if the device is not assigned (dev->devnum==-1) returns NULL
743 struct usb_device *usb_get_dev_index(int index)
745 if (usb_dev[index].devnum == -1)
748 return &usb_dev[index];
752 /* returns a pointer of a new device structure or NULL, if
753 * no device struct is available
755 struct usb_device *usb_alloc_new_device(void)
758 USB_PRINTF("New Device %d\n", dev_index);
759 if (dev_index == USB_MAX_DEVICE) {
760 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
763 /* default Address is 0, real addresses start with 1 */
764 usb_dev[dev_index].devnum = dev_index + 1;
765 usb_dev[dev_index].maxchild = 0;
766 for (i = 0; i < USB_MAXCHILDREN; i++)
767 usb_dev[dev_index].children[i] = NULL;
768 usb_dev[dev_index].parent = NULL;
770 return &usb_dev[dev_index - 1];
775 * By the time we get here, the device has gotten a new device ID
776 * and is in the default state. We need to identify the thing and
777 * get the ball rolling..
779 * Returns 0 for success, != 0 for error.
781 int usb_new_device(struct usb_device *dev)
785 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
787 /* We still haven't set the Address yet */
791 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
792 /* this is the old and known way of initializing devices, it is
793 * different than what Windows and Linux are doing. Windows and Linux
794 * both retrieve 64 bytes while reading the device descriptor
795 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
796 * invalid header while reading 8 bytes as device descriptor. */
797 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
798 dev->maxpacketsize = PACKET_SIZE_8;
799 dev->epmaxpacketin[0] = 8;
800 dev->epmaxpacketout[0] = 8;
802 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
804 printf("\n USB device not responding, " \
805 "giving up (status=%lX)\n", dev->status);
809 /* This is a Windows scheme of initialization sequence, with double
810 * reset of the device (Linux uses the same sequence)
811 * Some equipment is said to work only with such init sequence; this
812 * patch is based on the work by Alan Stern:
813 * http://sourceforge.net/mailarchive/forum.php?
814 * thread_id=5729457&forum_id=5398
816 struct usb_device_descriptor *desc;
818 struct usb_device *parent = dev->parent;
819 unsigned short portstatus;
821 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
822 * only 18 bytes long, this will terminate with a short packet. But if
823 * the maxpacket size is 8 or 16 the device may be waiting to transmit
824 * some more, or keeps on retransmitting the 8 byte header. */
826 desc = (struct usb_device_descriptor *)tmpbuf;
827 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
828 /* Default to 64 byte max packet size */
829 dev->maxpacketsize = PACKET_SIZE_64;
830 dev->epmaxpacketin[0] = 64;
831 dev->epmaxpacketout[0] = 64;
833 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
835 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
839 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
841 /* find the port number we're at */
845 for (j = 0; j < parent->maxchild; j++) {
846 if (parent->children[j] == dev) {
852 printf("usb_new_device:cannot locate device's port.\n");
856 /* reset the port for the second time */
857 err = hub_port_reset(dev->parent, port, &portstatus);
859 printf("\n Couldn't reset port %i\n", port);
865 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
866 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
867 switch (dev->descriptor.bMaxPacketSize0) {
869 dev->maxpacketsize = PACKET_SIZE_8;
872 dev->maxpacketsize = PACKET_SIZE_16;
875 dev->maxpacketsize = PACKET_SIZE_32;
878 dev->maxpacketsize = PACKET_SIZE_64;
883 err = usb_set_address(dev); /* set address */
886 printf("\n USB device not accepting new address " \
887 "(error=%lX)\n", dev->status);
891 mdelay(10); /* Let the SET_ADDRESS settle */
893 tmp = sizeof(dev->descriptor);
895 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
896 &dev->descriptor, sizeof(dev->descriptor));
899 printf("unable to get device descriptor (error=%d)\n",
902 printf("USB device descriptor short read " \
903 "(expected %i, got %i)\n", tmp, err);
906 /* correct le values */
907 le16_to_cpus(&dev->descriptor.bcdUSB);
908 le16_to_cpus(&dev->descriptor.idVendor);
909 le16_to_cpus(&dev->descriptor.idProduct);
910 le16_to_cpus(&dev->descriptor.bcdDevice);
911 /* only support for one config for now */
912 usb_get_configuration_no(dev, tmpbuf, 0);
913 usb_parse_config(dev, tmpbuf, 0);
914 usb_set_maxpacket(dev);
915 /* we set the default configuration here */
916 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
917 printf("failed to set default configuration " \
918 "len %d, status %lX\n", dev->act_len, dev->status);
921 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
922 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
923 dev->descriptor.iSerialNumber);
924 memset(dev->mf, 0, sizeof(dev->mf));
925 memset(dev->prod, 0, sizeof(dev->prod));
926 memset(dev->serial, 0, sizeof(dev->serial));
927 if (dev->descriptor.iManufacturer)
928 usb_string(dev, dev->descriptor.iManufacturer,
929 dev->mf, sizeof(dev->mf));
930 if (dev->descriptor.iProduct)
931 usb_string(dev, dev->descriptor.iProduct,
932 dev->prod, sizeof(dev->prod));
933 if (dev->descriptor.iSerialNumber)
934 usb_string(dev, dev->descriptor.iSerialNumber,
935 dev->serial, sizeof(dev->serial));
936 USB_PRINTF("Manufacturer %s\n", dev->mf);
937 USB_PRINTF("Product %s\n", dev->prod);
938 USB_PRINTF("SerialNumber %s\n", dev->serial);
939 /* now prode if the device is a hub */
940 usb_hub_probe(dev, 0);
944 /* build device Tree */
945 static void usb_scan_devices(void)
948 struct usb_device *dev;
950 /* first make all devices unknown */
951 for (i = 0; i < USB_MAX_DEVICE; i++) {
952 memset(&usb_dev[i], 0, sizeof(struct usb_device));
953 usb_dev[i].devnum = -1;
956 /* device 0 is always present (root hub, so let it analyze) */
957 dev = usb_alloc_new_device();
958 if (usb_new_device(dev))
959 printf("No USB Device found\n");
961 printf("%d USB Device(s) found\n", dev_index);
962 /* insert "driver" if possible */
963 #ifdef CONFIG_USB_KEYBOARD
966 USB_PRINTF("scan end\n");