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>
55 #include <asm/4xx_pci.h>
60 #define USB_HUB_DEBUG 1
63 #define USB_HUB_DEBUG 0
66 #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args)
67 #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args)
69 #define USB_BUFSIZ 512
71 static struct usb_device usb_dev[USB_MAX_DEVICE];
74 static int asynch_allowed;
75 static struct devrequest setup_packet;
77 char usb_started; /* flag for the started/stopped USB status */
79 /**********************************************************************
80 * some forward declerations...
82 void usb_scan_devices(void);
84 int usb_hub_probe(struct usb_device *dev, int ifnum);
85 void usb_hub_reset(void);
86 static int hub_port_reset(struct usb_device *dev, int port,
87 unsigned short *portstat);
89 /***********************************************************************
93 inline void wait_ms(unsigned long ms)
99 /***************************************************************************
111 /* init low_level USB */
113 result = usb_lowlevel_init();
114 /* if lowlevel init is OK, scan the bus for devices
115 * i.e. search HUBs and configure them */
117 printf("scanning bus for devices... ");
123 printf("Error, couldn't init Lowlevel part\n");
129 /******************************************************************************
130 * Stop USB this stops the LowLevel Part and deregisters USB devices.
140 res = usb_lowlevel_stop();
146 * disables the asynch behaviour of the control message. This is used for data
147 * transfers that uses the exclusiv access to the control and bulk messages.
148 * Returns the old value so it can be restored later.
150 int usb_disable_asynch(int disable)
152 int old_value = asynch_allowed;
154 asynch_allowed = !disable;
159 /*-------------------------------------------------------------------
165 * submits an Interrupt Message
167 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
168 void *buffer, int transfer_len, int interval)
170 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
174 * submits a control message and waits for comletion (at least timeout * 1ms)
175 * If timeout is 0, we don't wait for completion (used as example to set and
176 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
177 * allow control messages with 0 timeout, by previousely resetting the flag
178 * asynch_allowed (usb_disable_asynch(1)).
179 * returns the transfered length if OK or -1 if error. The transfered length
180 * and the current status are stored in the dev->act_len and dev->status.
182 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
183 unsigned char request, unsigned char requesttype,
184 unsigned short value, unsigned short index,
185 void *data, unsigned short size, int timeout)
187 if ((timeout == 0) && (!asynch_allowed)) {
188 /* request for a asynch control pipe is not allowed */
192 /* set setup command */
193 setup_packet.requesttype = requesttype;
194 setup_packet.request = request;
195 setup_packet.value = cpu_to_le16(value);
196 setup_packet.index = cpu_to_le16(index);
197 setup_packet.length = cpu_to_le16(size);
198 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
199 "value 0x%X index 0x%X length 0x%X\n",
200 request, requesttype, value, index, size);
201 dev->status = USB_ST_NOT_PROC; /*not yet processed */
203 submit_control_msg(dev, pipe, data, size, &setup_packet);
208 * Wait for status to update until timeout expires, USB driver
209 * interrupt handler may set the status when the USB operation has
213 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
224 /*-------------------------------------------------------------------
225 * submits bulk message, and waits for completion. returns 0 if Ok or
227 * synchronous behavior
229 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
230 void *data, int len, int *actual_length, int timeout)
234 dev->status = USB_ST_NOT_PROC; /*not yet processed */
235 submit_bulk_msg(dev, pipe, data, len);
237 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
241 *actual_length = dev->act_len;
242 if (dev->status == 0)
249 /*-------------------------------------------------------------------
254 * returns the max packet size, depending on the pipe direction and
255 * the configurations values
257 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
259 /* direction is out -> use emaxpacket out */
260 if ((pipe & USB_DIR_IN) == 0)
261 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
263 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
267 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
268 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
269 * when it is inlined in 1 single routine. What happens is that the register r3
270 * is used as loop-count 'i', but gets overwritten later on.
271 * This is clearly a compiler bug, but it is easier to workaround it here than
272 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
273 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
275 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
277 static void __attribute__((noinline))
278 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
281 struct usb_endpoint_descriptor *ep;
283 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
285 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
287 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
288 USB_ENDPOINT_XFER_CONTROL) {
289 /* Control => bidirectional */
290 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
291 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
292 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
293 b, dev->epmaxpacketin[b]);
295 if ((ep->bEndpointAddress & 0x80) == 0) {
297 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
298 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
299 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
300 b, dev->epmaxpacketout[b]);
304 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
305 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
306 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
307 b, dev->epmaxpacketin[b]);
314 * set the max packed value of all endpoints in the given configuration
316 int usb_set_maxpacket(struct usb_device *dev)
320 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
321 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
322 usb_set_maxpacket_ep(dev, i, ii);
327 /*******************************************************************************
328 * Parse the config, located in buffer, and fills the dev->config structure.
329 * Note that all little/big endian swapping are done automatically.
331 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
333 struct usb_descriptor_header *head;
334 int index, ifno, epno, curr_if_num;
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 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
383 USB_PRINTF("if %d, ep %d\n", ifno, epno);
386 if (head->bLength == 0)
389 USB_PRINTF("unknown Description Type : %x\n",
390 head->bDescriptorType);
394 unsigned char *ch = (unsigned char *)head;
396 for (i = 0; i < head->bLength; i++)
397 USB_PRINTF("%02X ", *ch++);
398 USB_PRINTF("\n\n\n");
402 index += head->bLength;
403 head = (struct usb_descriptor_header *)&buffer[index];
408 /***********************************************************************
410 * endp: endpoint number in bits 0-3;
411 * direction flag in bit 7 (1 = IN, 0 = OUT)
413 int usb_clear_halt(struct usb_device *dev, int pipe)
416 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
418 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
419 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
420 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
422 /* don't clear if failed */
427 * NOTE: we do not get status and verify reset was successful
428 * as some devices are reported to lock up upon this check..
431 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
433 /* toggle is reset on clear */
434 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
439 /**********************************************************************
440 * get_descriptor type
442 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
443 unsigned char index, void *buf, int size)
446 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
447 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
448 (type << 8) + index, 0,
449 buf, size, USB_CNTL_TIMEOUT);
453 /**********************************************************************
454 * gets configuration cfgno and store it in the buffer
456 int usb_get_configuration_no(struct usb_device *dev,
457 unsigned char *buffer, int cfgno)
461 struct usb_configuration_descriptor *config;
463 config = (struct usb_configuration_descriptor *)&buffer[0];
464 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
467 printf("unable to get descriptor, error %lX\n",
470 printf("config descriptor too short " \
471 "(expected %i, got %i)\n", 9, result);
474 tmp = le16_to_cpu(config->wTotalLength);
476 if (tmp > USB_BUFSIZ) {
477 USB_PRINTF("usb_get_configuration_no: failed to get " \
478 "descriptor - too long: %d\n", tmp);
482 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
483 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
488 /********************************************************************
489 * set address of a device to the value in dev->devnum.
490 * This can only be done by addressing the device via the default address (0)
492 int usb_set_address(struct usb_device *dev)
496 USB_PRINTF("set address %d\n", dev->devnum);
497 res = usb_control_msg(dev, usb_snddefctrl(dev),
498 USB_REQ_SET_ADDRESS, 0,
500 NULL, 0, USB_CNTL_TIMEOUT);
504 /********************************************************************
505 * set interface number to interface
507 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
509 struct usb_interface *if_face = NULL;
512 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
513 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
514 if_face = &dev->config.if_desc[i];
519 printf("selecting invalid interface %d", interface);
523 * We should return now for devices with only one alternate setting.
524 * According to 9.4.10 of the Universal Serial Bus Specification
525 * Revision 2.0 such devices can return with a STALL. This results in
526 * some USB sticks timeouting during initialization and then being
527 * unusable in U-Boot.
529 if (if_face->num_altsetting == 1)
532 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
533 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
534 alternate, interface, NULL, 0,
535 USB_CNTL_TIMEOUT * 5);
542 /********************************************************************
543 * set configuration number to configuration
545 int usb_set_configuration(struct usb_device *dev, int configuration)
548 USB_PRINTF("set configuration %d\n", configuration);
549 /* set setup command */
550 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
551 USB_REQ_SET_CONFIGURATION, 0,
553 NULL, 0, USB_CNTL_TIMEOUT);
562 /********************************************************************
563 * set protocol to protocol
565 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
567 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
568 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
569 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
572 /********************************************************************
575 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
577 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
578 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
579 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
582 /********************************************************************
585 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
586 unsigned char id, void *buf, int size)
588 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
590 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
591 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
594 /********************************************************************
595 * get class descriptor
597 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
598 unsigned char type, unsigned char id, void *buf, int size)
600 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
601 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
602 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
605 /********************************************************************
606 * get string index in buffer
608 int usb_get_string(struct usb_device *dev, unsigned short langid,
609 unsigned char index, void *buf, int size)
614 for (i = 0; i < 3; ++i) {
615 /* some devices are flaky */
616 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
617 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
618 (USB_DT_STRING << 8) + index, langid, buf, size,
629 static void usb_try_string_workarounds(unsigned char *buf, int *length)
631 int newlength, oldlength = *length;
633 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
634 if (!isprint(buf[newlength]) || buf[newlength + 1])
644 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
645 unsigned int index, unsigned char *buf)
649 /* Try to read the string descriptor by asking for the maximum
650 * possible number of bytes */
651 rc = usb_get_string(dev, langid, index, buf, 255);
653 /* If that failed try to read the descriptor length, then
654 * ask for just that many bytes */
656 rc = usb_get_string(dev, langid, index, buf, 2);
658 rc = usb_get_string(dev, langid, index, buf, buf[0]);
662 if (!buf[0] && !buf[1])
663 usb_try_string_workarounds(buf, &rc);
665 /* There might be extra junk at the end of the descriptor */
669 rc = rc - (rc & 1); /* force a multiple of two */
679 /********************************************************************
681 * Get string index and translate it to ascii.
682 * returns string length (> 0) or error (< 0)
684 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
686 unsigned char mybuf[USB_BUFSIZ];
691 if (size <= 0 || !buf || !index)
696 /* get langid for strings if it's not yet known */
697 if (!dev->have_langid) {
698 err = usb_string_sub(dev, 0, 0, tbuf);
700 USB_PRINTF("error getting string descriptor 0 " \
701 "(error=%lx)\n", dev->status);
703 } else if (tbuf[0] < 4) {
704 USB_PRINTF("string descriptor 0 too short\n");
707 dev->have_langid = -1;
708 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
709 /* always use the first langid listed */
710 USB_PRINTF("USB device number %d default " \
711 "language ID 0x%x\n",
712 dev->devnum, dev->string_langid);
716 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
720 size--; /* leave room for trailing NULL char in output buffer */
721 for (idx = 0, u = 2; u < err; u += 2) {
724 if (tbuf[u+1]) /* high byte */
725 buf[idx++] = '?'; /* non-ASCII character */
727 buf[idx++] = tbuf[u];
735 /********************************************************************
736 * USB device handling:
737 * the USB device are static allocated [USB_MAX_DEVICE].
741 /* returns a pointer to the device with the index [index].
742 * if the device is not assigned (dev->devnum==-1) returns NULL
744 struct usb_device *usb_get_dev_index(int index)
746 if (usb_dev[index].devnum == -1)
749 return &usb_dev[index];
753 /* returns a pointer of a new device structure or NULL, if
754 * no device struct is available
756 struct usb_device *usb_alloc_new_device(void)
759 USB_PRINTF("New Device %d\n", dev_index);
760 if (dev_index == USB_MAX_DEVICE) {
761 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
764 /* default Address is 0, real addresses start with 1 */
765 usb_dev[dev_index].devnum = dev_index + 1;
766 usb_dev[dev_index].maxchild = 0;
767 for (i = 0; i < USB_MAXCHILDREN; i++)
768 usb_dev[dev_index].children[i] = NULL;
769 usb_dev[dev_index].parent = NULL;
771 return &usb_dev[dev_index - 1];
776 * By the time we get here, the device has gotten a new device ID
777 * and is in the default state. We need to identify the thing and
778 * get the ball rolling..
780 * Returns 0 for success, != 0 for error.
782 int usb_new_device(struct usb_device *dev)
786 unsigned char tmpbuf[USB_BUFSIZ];
788 /* We still haven't set the Address yet */
792 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
793 /* this is the old and known way of initializing devices, it is
794 * different than what Windows and Linux are doing. Windows and Linux
795 * both retrieve 64 bytes while reading the device descriptor
796 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
797 * invalid header while reading 8 bytes as device descriptor. */
798 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
799 dev->maxpacketsize = PACKET_SIZE_8;
800 dev->epmaxpacketin[0] = 8;
801 dev->epmaxpacketout[0] = 8;
803 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
805 printf("\n USB device not responding, " \
806 "giving up (status=%lX)\n", dev->status);
810 /* This is a Windows scheme of initialization sequence, with double
811 * reset of the device (Linux uses the same sequence)
812 * Some equipment is said to work only with such init sequence; this
813 * patch is based on the work by Alan Stern:
814 * http://sourceforge.net/mailarchive/forum.php?
815 * thread_id=5729457&forum_id=5398
817 struct usb_device_descriptor *desc;
819 struct usb_device *parent = dev->parent;
820 unsigned short portstatus;
822 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
823 * only 18 bytes long, this will terminate with a short packet. But if
824 * the maxpacket size is 8 or 16 the device may be waiting to transmit
825 * some more, or keeps on retransmitting the 8 byte header. */
827 desc = (struct usb_device_descriptor *)tmpbuf;
828 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
829 /* Default to 64 byte max packet size */
830 dev->maxpacketsize = PACKET_SIZE_64;
831 dev->epmaxpacketin[0] = 64;
832 dev->epmaxpacketout[0] = 64;
834 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
836 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
840 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
842 /* find the port number we're at */
846 for (j = 0; j < parent->maxchild; j++) {
847 if (parent->children[j] == dev) {
853 printf("usb_new_device:cannot locate device's port.\n");
857 /* reset the port for the second time */
858 err = hub_port_reset(dev->parent, port, &portstatus);
860 printf("\n Couldn't reset port %i\n", port);
866 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
867 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
868 switch (dev->descriptor.bMaxPacketSize0) {
870 dev->maxpacketsize = PACKET_SIZE_8;
873 dev->maxpacketsize = PACKET_SIZE_16;
876 dev->maxpacketsize = PACKET_SIZE_32;
879 dev->maxpacketsize = PACKET_SIZE_64;
884 err = usb_set_address(dev); /* set address */
887 printf("\n USB device not accepting new address " \
888 "(error=%lX)\n", dev->status);
892 wait_ms(10); /* Let the SET_ADDRESS settle */
894 tmp = sizeof(dev->descriptor);
896 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
897 &dev->descriptor, sizeof(dev->descriptor));
900 printf("unable to get device descriptor (error=%d)\n",
903 printf("USB device descriptor short read " \
904 "(expected %i, got %i)\n", tmp, err);
907 /* correct le values */
908 le16_to_cpus(&dev->descriptor.bcdUSB);
909 le16_to_cpus(&dev->descriptor.idVendor);
910 le16_to_cpus(&dev->descriptor.idProduct);
911 le16_to_cpus(&dev->descriptor.bcdDevice);
912 /* only support for one config for now */
913 usb_get_configuration_no(dev, &tmpbuf[0], 0);
914 usb_parse_config(dev, &tmpbuf[0], 0);
915 usb_set_maxpacket(dev);
916 /* we set the default configuration here */
917 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
918 printf("failed to set default configuration " \
919 "len %d, status %lX\n", dev->act_len, dev->status);
922 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
923 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
924 dev->descriptor.iSerialNumber);
925 memset(dev->mf, 0, sizeof(dev->mf));
926 memset(dev->prod, 0, sizeof(dev->prod));
927 memset(dev->serial, 0, sizeof(dev->serial));
928 if (dev->descriptor.iManufacturer)
929 usb_string(dev, dev->descriptor.iManufacturer,
930 dev->mf, sizeof(dev->mf));
931 if (dev->descriptor.iProduct)
932 usb_string(dev, dev->descriptor.iProduct,
933 dev->prod, sizeof(dev->prod));
934 if (dev->descriptor.iSerialNumber)
935 usb_string(dev, dev->descriptor.iSerialNumber,
936 dev->serial, sizeof(dev->serial));
937 USB_PRINTF("Manufacturer %s\n", dev->mf);
938 USB_PRINTF("Product %s\n", dev->prod);
939 USB_PRINTF("SerialNumber %s\n", dev->serial);
940 /* now prode if the device is a hub */
941 usb_hub_probe(dev, 0);
945 /* build device Tree */
946 void usb_scan_devices(void)
949 struct usb_device *dev;
951 /* first make all devices unknown */
952 for (i = 0; i < USB_MAX_DEVICE; i++) {
953 memset(&usb_dev[i], 0, sizeof(struct usb_device));
954 usb_dev[i].devnum = -1;
957 /* device 0 is always present (root hub, so let it analyze) */
958 dev = usb_alloc_new_device();
959 if (usb_new_device(dev))
960 printf("No USB Device found\n");
962 printf("%d USB Device(s) found\n", dev_index);
963 /* insert "driver" if possible */
964 #ifdef CONFIG_USB_KEYBOARD
967 USB_PRINTF("scan end\n");
971 /****************************************************************************
973 * Probes device for being a hub and configurate it
976 static struct usb_hub_device hub_dev[USB_MAX_HUB];
977 static int usb_hub_index;
980 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
982 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
983 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
984 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
987 int usb_clear_hub_feature(struct usb_device *dev, int feature)
989 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
990 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
991 0, NULL, 0, USB_CNTL_TIMEOUT);
994 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
996 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
997 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
998 port, NULL, 0, USB_CNTL_TIMEOUT);
1001 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
1003 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1004 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
1005 port, NULL, 0, USB_CNTL_TIMEOUT);
1008 int usb_get_hub_status(struct usb_device *dev, void *data)
1010 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1011 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1012 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1015 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1017 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1018 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1019 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1023 static void usb_hub_power_on(struct usb_hub_device *hub)
1026 struct usb_device *dev;
1028 dev = hub->pusb_dev;
1029 /* Enable power to the ports */
1030 USB_HUB_PRINTF("enabling power on all ports\n");
1031 for (i = 0; i < dev->maxchild; i++) {
1032 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1033 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1034 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1038 void usb_hub_reset(void)
1043 struct usb_hub_device *usb_hub_allocate(void)
1045 if (usb_hub_index < USB_MAX_HUB)
1046 return &hub_dev[usb_hub_index++];
1048 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1054 static inline char *portspeed(int portstatus)
1056 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1058 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1064 static int hub_port_reset(struct usb_device *dev, int port,
1065 unsigned short *portstat)
1068 struct usb_port_status portsts;
1069 unsigned short portstatus, portchange;
1071 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1072 for (tries = 0; tries < MAX_TRIES; tries++) {
1074 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1077 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1078 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1082 portstatus = le16_to_cpu(portsts.wPortStatus);
1083 portchange = le16_to_cpu(portsts.wPortChange);
1085 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1086 portstatus, portchange,
1087 portspeed(portstatus));
1089 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1090 " USB_PORT_STAT_ENABLE %d\n",
1091 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1092 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1093 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1095 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1096 !(portstatus & USB_PORT_STAT_CONNECTION))
1099 if (portstatus & USB_PORT_STAT_ENABLE)
1105 if (tries == MAX_TRIES) {
1106 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1107 "disabling port.\n", port + 1, MAX_TRIES);
1108 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1112 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1113 *portstat = portstatus;
1118 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1120 struct usb_device *usb;
1121 struct usb_port_status portsts;
1122 unsigned short portstatus;
1125 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1126 USB_HUB_PRINTF("get_port_status failed\n");
1130 portstatus = le16_to_cpu(portsts.wPortStatus);
1131 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1133 le16_to_cpu(portsts.wPortChange),
1134 portspeed(portstatus));
1136 /* Clear the connection change status */
1137 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1139 /* Disconnect any existing devices under this port */
1140 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1141 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1142 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1143 /* Return now if nothing is connected */
1144 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1149 /* Reset the port */
1150 if (hub_port_reset(dev, port, &portstatus) < 0) {
1151 printf("cannot reset port %i!?\n", port + 1);
1157 /* Allocate a new device struct for it */
1158 usb = usb_alloc_new_device();
1160 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1161 usb->speed = USB_SPEED_HIGH;
1162 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1163 usb->speed = USB_SPEED_LOW;
1165 usb->speed = USB_SPEED_FULL;
1167 dev->children[port] = usb;
1169 usb->portnr = port + 1;
1170 /* Run it through the hoops (find a driver, etc) */
1171 if (usb_new_device(usb)) {
1172 /* Woops, disable the port */
1173 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1174 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1179 int usb_hub_configure(struct usb_device *dev)
1182 unsigned char buffer[USB_BUFSIZ], *bitmap;
1183 struct usb_hub_descriptor *descriptor;
1184 struct usb_hub_device *hub;
1185 #ifdef USB_HUB_DEBUG
1186 struct usb_hub_status *hubsts;
1189 /* "allocate" Hub device */
1190 hub = usb_hub_allocate();
1193 hub->pusb_dev = dev;
1194 /* Get the the hub descriptor */
1195 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1196 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1197 "descriptor, giving up %lX\n", dev->status);
1200 descriptor = (struct usb_hub_descriptor *)buffer;
1202 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1203 i = descriptor->bLength;
1204 if (i > USB_BUFSIZ) {
1205 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1206 "descriptor - too long: %d\n",
1207 descriptor->bLength);
1211 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1212 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1213 "descriptor 2nd giving up %lX\n", dev->status);
1216 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1217 /* adjust 16bit values */
1218 hub->desc.wHubCharacteristics =
1219 le16_to_cpu(descriptor->wHubCharacteristics);
1220 /* set the bitmap */
1221 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1222 /* devices not removable by default */
1223 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1224 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1225 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1227 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1228 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1230 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1231 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
1233 dev->maxchild = descriptor->bNbrPorts;
1234 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1236 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1238 USB_HUB_PRINTF("ganged power switching\n");
1241 USB_HUB_PRINTF("individual port power switching\n");
1245 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1249 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1250 USB_HUB_PRINTF("part of a compound device\n");
1252 USB_HUB_PRINTF("standalone hub\n");
1254 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1256 USB_HUB_PRINTF("global over-current protection\n");
1259 USB_HUB_PRINTF("individual port over-current protection\n");
1263 USB_HUB_PRINTF("no over-current protection\n");
1267 USB_HUB_PRINTF("power on to power good time: %dms\n",
1268 descriptor->bPwrOn2PwrGood * 2);
1269 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1270 descriptor->bHubContrCurrent);
1272 for (i = 0; i < dev->maxchild; i++)
1273 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1274 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1275 (1 << ((i + 1) % 8)) ? " not" : "");
1277 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1278 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1279 "too long: %d\n", descriptor->bLength);
1283 if (usb_get_hub_status(dev, buffer) < 0) {
1284 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1289 #ifdef USB_HUB_DEBUG
1290 hubsts = (struct usb_hub_status *)buffer;
1292 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1293 le16_to_cpu(hubsts->wHubStatus),
1294 le16_to_cpu(hubsts->wHubChange));
1295 USB_HUB_PRINTF("local power source is %s\n",
1296 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1297 "lost (inactive)" : "good");
1298 USB_HUB_PRINTF("%sover-current condition exists\n",
1299 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1301 usb_hub_power_on(hub);
1303 for (i = 0; i < dev->maxchild; i++) {
1304 struct usb_port_status portsts;
1305 unsigned short portstatus, portchange;
1307 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1308 USB_HUB_PRINTF("get_port_status failed\n");
1312 portstatus = le16_to_cpu(portsts.wPortStatus);
1313 portchange = le16_to_cpu(portsts.wPortChange);
1314 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1315 i + 1, portstatus, portchange);
1317 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1318 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1319 usb_hub_port_connect_change(dev, i);
1321 if (portchange & USB_PORT_STAT_C_ENABLE) {
1322 USB_HUB_PRINTF("port %d enable change, status %x\n",
1324 usb_clear_port_feature(dev, i + 1,
1325 USB_PORT_FEAT_C_ENABLE);
1327 /* EM interference sometimes causes bad shielded USB
1328 * devices to be shutdown by the hub, this hack enables
1329 * them again. Works at least with mouse driver */
1330 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1331 (portstatus & USB_PORT_STAT_CONNECTION) &&
1332 ((dev->children[i]))) {
1333 USB_HUB_PRINTF("already running port %i " \
1334 "disabled by hub (EMI?), " \
1335 "re-enabling...\n", i + 1);
1336 usb_hub_port_connect_change(dev, i);
1339 if (portstatus & USB_PORT_STAT_SUSPEND) {
1340 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1341 usb_clear_port_feature(dev, i + 1,
1342 USB_PORT_FEAT_SUSPEND);
1345 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1346 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1347 usb_clear_port_feature(dev, i + 1,
1348 USB_PORT_FEAT_C_OVER_CURRENT);
1349 usb_hub_power_on(hub);
1352 if (portchange & USB_PORT_STAT_C_RESET) {
1353 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1354 usb_clear_port_feature(dev, i + 1,
1355 USB_PORT_FEAT_C_RESET);
1357 } /* end for i all ports */
1362 int usb_hub_probe(struct usb_device *dev, int ifnum)
1364 struct usb_interface *iface;
1365 struct usb_endpoint_descriptor *ep;
1368 iface = &dev->config.if_desc[ifnum];
1370 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1372 /* Some hubs have a subclass of 1, which AFAICT according to the */
1373 /* specs is not defined, but it works */
1374 if ((iface->desc.bInterfaceSubClass != 0) &&
1375 (iface->desc.bInterfaceSubClass != 1))
1377 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1378 if (iface->desc.bNumEndpoints != 1)
1380 ep = &iface->ep_desc[0];
1381 /* Output endpoint? Curiousier and curiousier.. */
1382 if (!(ep->bEndpointAddress & USB_DIR_IN))
1384 /* If it's not an interrupt endpoint, we'd better punt! */
1385 if ((ep->bmAttributes & 3) != 3)
1387 /* We found a hub */
1388 USB_HUB_PRINTF("USB hub found\n");
1389 ret = usb_hub_configure(dev);