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>
64 #define USB_PRINTF(fmt, args...) printf(fmt , ##args)
66 #define USB_PRINTF(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.
149 void usb_disable_asynch(int disable)
151 asynch_allowed = !disable;
155 /*-------------------------------------------------------------------
161 * submits an Interrupt Message
163 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
164 void *buffer, int transfer_len, int interval)
166 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
170 * submits a control message and waits for comletion (at least timeout * 1ms)
171 * If timeout is 0, we don't wait for completion (used as example to set and
172 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
173 * allow control messages with 0 timeout, by previousely resetting the flag
174 * asynch_allowed (usb_disable_asynch(1)).
175 * returns the transfered length if OK or -1 if error. The transfered length
176 * and the current status are stored in the dev->act_len and dev->status.
178 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
179 unsigned char request, unsigned char requesttype,
180 unsigned short value, unsigned short index,
181 void *data, unsigned short size, int timeout)
183 if ((timeout == 0) && (!asynch_allowed)) {
184 /* request for a asynch control pipe is not allowed */
188 /* set setup command */
189 setup_packet.requesttype = requesttype;
190 setup_packet.request = request;
191 setup_packet.value = cpu_to_le16(value);
192 setup_packet.index = cpu_to_le16(index);
193 setup_packet.length = cpu_to_le16(size);
194 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
195 "value 0x%X index 0x%X length 0x%X\n",
196 request, requesttype, value, index, size);
197 dev->status = USB_ST_NOT_PROC; /*not yet processed */
199 submit_control_msg(dev, pipe, data, size, &setup_packet);
204 * Wait for status to update until timeout expires, USB driver
205 * interrupt handler may set the status when the USB operation has
209 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
220 /*-------------------------------------------------------------------
221 * submits bulk message, and waits for completion. returns 0 if Ok or
223 * synchronous behavior
225 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
226 void *data, int len, int *actual_length, int timeout)
230 dev->status = USB_ST_NOT_PROC; /*not yet processed */
231 submit_bulk_msg(dev, pipe, data, len);
233 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
237 *actual_length = dev->act_len;
238 if (dev->status == 0)
245 /*-------------------------------------------------------------------
250 * returns the max packet size, depending on the pipe direction and
251 * the configurations values
253 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
255 /* direction is out -> use emaxpacket out */
256 if ((pipe & USB_DIR_IN) == 0)
257 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
259 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
262 /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
263 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
264 * when it is inlined in 1 single routine. What happens is that the register r3
265 * is used as loop-count 'i', but gets overwritten later on.
266 * This is clearly a compiler bug, but it is easier to workaround it here than
267 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
268 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
270 static void __attribute__((noinline))
271 usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
275 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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 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,
313 &dev->config.if_desc[i].ep_desc[ii]);
318 /*******************************************************************************
319 * Parse the config, located in buffer, and fills the dev->config structure.
320 * Note that all little/big endian swapping are done automatically.
322 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
324 struct usb_descriptor_header *head;
325 int index, ifno, epno, curr_if_num;
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 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
375 USB_PRINTF("if %d, ep %d\n", ifno, epno);
378 if (head->bLength == 0)
381 USB_PRINTF("unknown Description Type : %x\n",
382 head->bDescriptorType);
385 ch = (unsigned char *)head;
386 for (i = 0; i < head->bLength; i++)
387 USB_PRINTF("%02X ", *ch++);
388 USB_PRINTF("\n\n\n");
392 index += head->bLength;
393 head = (struct usb_descriptor_header *)&buffer[index];
398 /***********************************************************************
400 * endp: endpoint number in bits 0-3;
401 * direction flag in bit 7 (1 = IN, 0 = OUT)
403 int usb_clear_halt(struct usb_device *dev, int pipe)
406 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
408 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
409 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
410 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
412 /* don't clear if failed */
417 * NOTE: we do not get status and verify reset was successful
418 * as some devices are reported to lock up upon this check..
421 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
423 /* toggle is reset on clear */
424 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
429 /**********************************************************************
430 * get_descriptor type
432 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
433 unsigned char index, void *buf, int size)
436 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
437 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
438 (type << 8) + index, 0,
439 buf, size, USB_CNTL_TIMEOUT);
443 /**********************************************************************
444 * gets configuration cfgno and store it in the buffer
446 int usb_get_configuration_no(struct usb_device *dev,
447 unsigned char *buffer, int cfgno)
451 struct usb_configuration_descriptor *config;
453 config = (struct usb_configuration_descriptor *)&buffer[0];
454 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
457 printf("unable to get descriptor, error %lX\n",
460 printf("config descriptor too short " \
461 "(expected %i, got %i)\n", 9, result);
464 tmp = le16_to_cpu(config->wTotalLength);
466 if (tmp > USB_BUFSIZ) {
467 USB_PRINTF("usb_get_configuration_no: failed to get " \
468 "descriptor - too long: %d\n", tmp);
472 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
473 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
478 /********************************************************************
479 * set address of a device to the value in dev->devnum.
480 * This can only be done by addressing the device via the default address (0)
482 int usb_set_address(struct usb_device *dev)
486 USB_PRINTF("set address %d\n", dev->devnum);
487 res = usb_control_msg(dev, usb_snddefctrl(dev),
488 USB_REQ_SET_ADDRESS, 0,
490 NULL, 0, USB_CNTL_TIMEOUT);
494 /********************************************************************
495 * set interface number to interface
497 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
499 struct usb_interface *if_face = NULL;
502 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
503 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
504 if_face = &dev->config.if_desc[i];
509 printf("selecting invalid interface %d", interface);
513 * We should return now for devices with only one alternate setting.
514 * According to 9.4.10 of the Universal Serial Bus Specification
515 * Revision 2.0 such devices can return with a STALL. This results in
516 * some USB sticks timeouting during initialization and then being
517 * unusable in U-Boot.
519 if (if_face->num_altsetting == 1)
522 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
523 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
524 alternate, interface, NULL, 0,
525 USB_CNTL_TIMEOUT * 5);
532 /********************************************************************
533 * set configuration number to configuration
535 int usb_set_configuration(struct usb_device *dev, int configuration)
538 USB_PRINTF("set configuration %d\n", configuration);
539 /* set setup command */
540 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
541 USB_REQ_SET_CONFIGURATION, 0,
543 NULL, 0, USB_CNTL_TIMEOUT);
552 /********************************************************************
553 * set protocol to protocol
555 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
557 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
558 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
559 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
562 /********************************************************************
565 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
567 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
568 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
569 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
572 /********************************************************************
575 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
576 unsigned char id, void *buf, int size)
578 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
580 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
581 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
584 /********************************************************************
585 * get class descriptor
587 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
588 unsigned char type, unsigned char id, void *buf, int size)
590 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
591 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
592 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
595 /********************************************************************
596 * get string index in buffer
598 int usb_get_string(struct usb_device *dev, unsigned short langid,
599 unsigned char index, void *buf, int size)
604 for (i = 0; i < 3; ++i) {
605 /* some devices are flaky */
606 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
607 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
608 (USB_DT_STRING << 8) + index, langid, buf, size,
619 static void usb_try_string_workarounds(unsigned char *buf, int *length)
621 int newlength, oldlength = *length;
623 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
624 if (!isprint(buf[newlength]) || buf[newlength + 1])
634 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
635 unsigned int index, unsigned char *buf)
639 /* Try to read the string descriptor by asking for the maximum
640 * possible number of bytes */
641 rc = usb_get_string(dev, langid, index, buf, 255);
643 /* If that failed try to read the descriptor length, then
644 * ask for just that many bytes */
646 rc = usb_get_string(dev, langid, index, buf, 2);
648 rc = usb_get_string(dev, langid, index, buf, buf[0]);
652 if (!buf[0] && !buf[1])
653 usb_try_string_workarounds(buf, &rc);
655 /* There might be extra junk at the end of the descriptor */
659 rc = rc - (rc & 1); /* force a multiple of two */
669 /********************************************************************
671 * Get string index and translate it to ascii.
672 * returns string length (> 0) or error (< 0)
674 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
676 unsigned char mybuf[USB_BUFSIZ];
681 if (size <= 0 || !buf || !index)
686 /* get langid for strings if it's not yet known */
687 if (!dev->have_langid) {
688 err = usb_string_sub(dev, 0, 0, tbuf);
690 USB_PRINTF("error getting string descriptor 0 " \
691 "(error=%lx)\n", dev->status);
693 } else if (tbuf[0] < 4) {
694 USB_PRINTF("string descriptor 0 too short\n");
697 dev->have_langid = -1;
698 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
699 /* always use the first langid listed */
700 USB_PRINTF("USB device number %d default " \
701 "language ID 0x%x\n",
702 dev->devnum, dev->string_langid);
706 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
710 size--; /* leave room for trailing NULL char in output buffer */
711 for (idx = 0, u = 2; u < err; u += 2) {
714 if (tbuf[u+1]) /* high byte */
715 buf[idx++] = '?'; /* non-ASCII character */
717 buf[idx++] = tbuf[u];
725 /********************************************************************
726 * USB device handling:
727 * the USB device are static allocated [USB_MAX_DEVICE].
731 /* returns a pointer to the device with the index [index].
732 * if the device is not assigned (dev->devnum==-1) returns NULL
734 struct usb_device *usb_get_dev_index(int index)
736 if (usb_dev[index].devnum == -1)
739 return &usb_dev[index];
743 /* returns a pointer of a new device structure or NULL, if
744 * no device struct is available
746 struct usb_device *usb_alloc_new_device(void)
749 USB_PRINTF("New Device %d\n", dev_index);
750 if (dev_index == USB_MAX_DEVICE) {
751 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
754 /* default Address is 0, real addresses start with 1 */
755 usb_dev[dev_index].devnum = dev_index + 1;
756 usb_dev[dev_index].maxchild = 0;
757 for (i = 0; i < USB_MAXCHILDREN; i++)
758 usb_dev[dev_index].children[i] = NULL;
759 usb_dev[dev_index].parent = NULL;
761 return &usb_dev[dev_index - 1];
766 * By the time we get here, the device has gotten a new device ID
767 * and is in the default state. We need to identify the thing and
768 * get the ball rolling..
770 * Returns 0 for success, != 0 for error.
772 int usb_new_device(struct usb_device *dev)
776 unsigned char tmpbuf[USB_BUFSIZ];
778 /* We still haven't set the Address yet */
782 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
783 /* this is the old and known way of initializing devices, it is
784 * different than what Windows and Linux are doing. Windows and Linux
785 * both retrieve 64 bytes while reading the device descriptor
786 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
787 * invalid header while reading 8 bytes as device descriptor. */
788 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
789 dev->maxpacketsize = PACKET_SIZE_8;
790 dev->epmaxpacketin[0] = 8;
791 dev->epmaxpacketout[0] = 8;
793 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
795 printf("\n USB device not responding, " \
796 "giving up (status=%lX)\n", dev->status);
800 /* This is a Windows scheme of initialization sequence, with double
801 * reset of the device (Linux uses the same sequence)
802 * Some equipment is said to work only with such init sequence; this
803 * patch is based on the work by Alan Stern:
804 * http://sourceforge.net/mailarchive/forum.php?
805 * thread_id=5729457&forum_id=5398
807 struct usb_device_descriptor *desc;
809 struct usb_device *parent = dev->parent;
810 unsigned short portstatus;
812 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
813 * only 18 bytes long, this will terminate with a short packet. But if
814 * the maxpacket size is 8 or 16 the device may be waiting to transmit
815 * some more, or keeps on retransmitting the 8 byte header. */
817 desc = (struct usb_device_descriptor *)tmpbuf;
818 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
819 /* Default to 64 byte max packet size */
820 dev->maxpacketsize = PACKET_SIZE_64;
821 dev->epmaxpacketin[0] = 64;
822 dev->epmaxpacketout[0] = 64;
824 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
826 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
830 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
832 /* find the port number we're at */
836 for (j = 0; j < parent->maxchild; j++) {
837 if (parent->children[j] == dev) {
843 printf("usb_new_device:cannot locate device's port.\n");
847 /* reset the port for the second time */
848 err = hub_port_reset(dev->parent, port, &portstatus);
850 printf("\n Couldn't reset port %i\n", port);
856 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
857 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
858 switch (dev->descriptor.bMaxPacketSize0) {
860 dev->maxpacketsize = PACKET_SIZE_8;
863 dev->maxpacketsize = PACKET_SIZE_16;
866 dev->maxpacketsize = PACKET_SIZE_32;
869 dev->maxpacketsize = PACKET_SIZE_64;
874 err = usb_set_address(dev); /* set address */
877 printf("\n USB device not accepting new address " \
878 "(error=%lX)\n", dev->status);
882 wait_ms(10); /* Let the SET_ADDRESS settle */
884 tmp = sizeof(dev->descriptor);
886 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
887 &dev->descriptor, sizeof(dev->descriptor));
890 printf("unable to get device descriptor (error=%d)\n",
893 printf("USB device descriptor short read " \
894 "(expected %i, got %i)\n", tmp, err);
897 /* correct le values */
898 le16_to_cpus(&dev->descriptor.bcdUSB);
899 le16_to_cpus(&dev->descriptor.idVendor);
900 le16_to_cpus(&dev->descriptor.idProduct);
901 le16_to_cpus(&dev->descriptor.bcdDevice);
902 /* only support for one config for now */
903 usb_get_configuration_no(dev, &tmpbuf[0], 0);
904 usb_parse_config(dev, &tmpbuf[0], 0);
905 usb_set_maxpacket(dev);
906 /* we set the default configuration here */
907 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
908 printf("failed to set default configuration " \
909 "len %d, status %lX\n", dev->act_len, dev->status);
912 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
913 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
914 dev->descriptor.iSerialNumber);
915 memset(dev->mf, 0, sizeof(dev->mf));
916 memset(dev->prod, 0, sizeof(dev->prod));
917 memset(dev->serial, 0, sizeof(dev->serial));
918 if (dev->descriptor.iManufacturer)
919 usb_string(dev, dev->descriptor.iManufacturer,
920 dev->mf, sizeof(dev->mf));
921 if (dev->descriptor.iProduct)
922 usb_string(dev, dev->descriptor.iProduct,
923 dev->prod, sizeof(dev->prod));
924 if (dev->descriptor.iSerialNumber)
925 usb_string(dev, dev->descriptor.iSerialNumber,
926 dev->serial, sizeof(dev->serial));
927 USB_PRINTF("Manufacturer %s\n", dev->mf);
928 USB_PRINTF("Product %s\n", dev->prod);
929 USB_PRINTF("SerialNumber %s\n", dev->serial);
930 /* now prode if the device is a hub */
931 usb_hub_probe(dev, 0);
935 /* build device Tree */
936 void usb_scan_devices(void)
939 struct usb_device *dev;
941 /* first make all devices unknown */
942 for (i = 0; i < USB_MAX_DEVICE; i++) {
943 memset(&usb_dev[i], 0, sizeof(struct usb_device));
944 usb_dev[i].devnum = -1;
947 /* device 0 is always present (root hub, so let it analyze) */
948 dev = usb_alloc_new_device();
949 if (usb_new_device(dev))
950 printf("No USB Device found\n");
952 printf("%d USB Device(s) found\n", dev_index);
953 /* insert "driver" if possible */
954 #ifdef CONFIG_USB_KEYBOARD
956 USB_PRINTF("scan end\n");
961 /****************************************************************************
963 * Probes device for being a hub and configurate it
967 #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
969 #define USB_HUB_PRINTF(fmt, args...)
973 static struct usb_hub_device hub_dev[USB_MAX_HUB];
974 static int usb_hub_index;
977 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
979 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
980 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
981 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
984 int usb_clear_hub_feature(struct usb_device *dev, int feature)
986 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
987 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
988 0, NULL, 0, USB_CNTL_TIMEOUT);
991 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
993 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
994 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
995 port, NULL, 0, USB_CNTL_TIMEOUT);
998 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
1000 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1001 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
1002 port, NULL, 0, USB_CNTL_TIMEOUT);
1005 int usb_get_hub_status(struct usb_device *dev, void *data)
1007 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1008 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1009 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1012 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1014 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1015 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1016 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1020 static void usb_hub_power_on(struct usb_hub_device *hub)
1023 struct usb_device *dev;
1025 dev = hub->pusb_dev;
1026 /* Enable power to the ports */
1027 USB_HUB_PRINTF("enabling power on all ports\n");
1028 for (i = 0; i < dev->maxchild; i++) {
1029 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1030 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1031 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1035 void usb_hub_reset(void)
1040 struct usb_hub_device *usb_hub_allocate(void)
1042 if (usb_hub_index < USB_MAX_HUB)
1043 return &hub_dev[usb_hub_index++];
1045 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1051 static inline char *portspeed(int portstatus)
1053 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1055 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1061 static int hub_port_reset(struct usb_device *dev, int port,
1062 unsigned short *portstat)
1065 struct usb_port_status portsts;
1066 unsigned short portstatus, portchange;
1068 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1069 for (tries = 0; tries < MAX_TRIES; tries++) {
1071 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1074 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1075 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1079 portstatus = le16_to_cpu(portsts.wPortStatus);
1080 portchange = le16_to_cpu(portsts.wPortChange);
1082 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1083 portstatus, portchange,
1084 portspeed(portstatus));
1086 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1087 " USB_PORT_STAT_ENABLE %d\n",
1088 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1089 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1090 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1092 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1093 !(portstatus & USB_PORT_STAT_CONNECTION))
1096 if (portstatus & USB_PORT_STAT_ENABLE)
1102 if (tries == MAX_TRIES) {
1103 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1104 "disabling port.\n", port + 1, MAX_TRIES);
1105 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1109 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1110 *portstat = portstatus;
1115 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1117 struct usb_device *usb;
1118 struct usb_port_status portsts;
1119 unsigned short portstatus, portchange;
1122 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1123 USB_HUB_PRINTF("get_port_status failed\n");
1127 portstatus = le16_to_cpu(portsts.wPortStatus);
1128 portchange = le16_to_cpu(portsts.wPortChange);
1129 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1130 portstatus, portchange, portspeed(portstatus));
1132 /* Clear the connection change status */
1133 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1135 /* Disconnect any existing devices under this port */
1136 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1137 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1138 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1139 /* Return now if nothing is connected */
1140 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1145 /* Reset the port */
1146 if (hub_port_reset(dev, port, &portstatus) < 0) {
1147 printf("cannot reset port %i!?\n", port + 1);
1153 /* Allocate a new device struct for it */
1154 usb = usb_alloc_new_device();
1156 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1157 usb->speed = USB_SPEED_HIGH;
1158 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1159 usb->speed = USB_SPEED_LOW;
1161 usb->speed = USB_SPEED_FULL;
1163 dev->children[port] = usb;
1165 /* Run it through the hoops (find a driver, etc) */
1166 if (usb_new_device(usb)) {
1167 /* Woops, disable the port */
1168 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1169 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1174 int usb_hub_configure(struct usb_device *dev)
1176 unsigned char buffer[USB_BUFSIZ], *bitmap;
1177 struct usb_hub_descriptor *descriptor;
1178 struct usb_hub_status *hubsts;
1180 struct usb_hub_device *hub;
1182 /* "allocate" Hub device */
1183 hub = usb_hub_allocate();
1186 hub->pusb_dev = dev;
1187 /* Get the the hub descriptor */
1188 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1189 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1190 "descriptor, giving up %lX\n", dev->status);
1193 descriptor = (struct usb_hub_descriptor *)buffer;
1195 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1196 i = descriptor->bLength;
1197 if (i > USB_BUFSIZ) {
1198 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1199 "descriptor - too long: %d\n",
1200 descriptor->bLength);
1204 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1205 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1206 "descriptor 2nd giving up %lX\n", dev->status);
1209 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1210 /* adjust 16bit values */
1211 hub->desc.wHubCharacteristics =
1212 le16_to_cpu(descriptor->wHubCharacteristics);
1213 /* set the bitmap */
1214 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1215 /* devices not removable by default */
1216 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1217 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1218 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1220 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1221 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1223 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1224 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
1226 dev->maxchild = descriptor->bNbrPorts;
1227 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1229 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1231 USB_HUB_PRINTF("ganged power switching\n");
1234 USB_HUB_PRINTF("individual port power switching\n");
1238 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1242 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1243 USB_HUB_PRINTF("part of a compound device\n");
1245 USB_HUB_PRINTF("standalone hub\n");
1247 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1249 USB_HUB_PRINTF("global over-current protection\n");
1252 USB_HUB_PRINTF("individual port over-current protection\n");
1256 USB_HUB_PRINTF("no over-current protection\n");
1260 USB_HUB_PRINTF("power on to power good time: %dms\n",
1261 descriptor->bPwrOn2PwrGood * 2);
1262 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1263 descriptor->bHubContrCurrent);
1265 for (i = 0; i < dev->maxchild; i++)
1266 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1267 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1268 (1 << ((i + 1) % 8)) ? " not" : "");
1270 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1271 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1272 "too long: %d\n", descriptor->bLength);
1276 if (usb_get_hub_status(dev, buffer) < 0) {
1277 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1282 hubsts = (struct usb_hub_status *)buffer;
1283 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1284 le16_to_cpu(hubsts->wHubStatus),
1285 le16_to_cpu(hubsts->wHubChange));
1286 USB_HUB_PRINTF("local power source is %s\n",
1287 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1288 "lost (inactive)" : "good");
1289 USB_HUB_PRINTF("%sover-current condition exists\n",
1290 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1292 usb_hub_power_on(hub);
1294 for (i = 0; i < dev->maxchild; i++) {
1295 struct usb_port_status portsts;
1296 unsigned short portstatus, portchange;
1298 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1299 USB_HUB_PRINTF("get_port_status failed\n");
1303 portstatus = le16_to_cpu(portsts.wPortStatus);
1304 portchange = le16_to_cpu(portsts.wPortChange);
1305 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1306 i + 1, portstatus, portchange);
1308 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1309 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1310 usb_hub_port_connect_change(dev, i);
1312 if (portchange & USB_PORT_STAT_C_ENABLE) {
1313 USB_HUB_PRINTF("port %d enable change, status %x\n",
1315 usb_clear_port_feature(dev, i + 1,
1316 USB_PORT_FEAT_C_ENABLE);
1318 /* EM interference sometimes causes bad shielded USB
1319 * devices to be shutdown by the hub, this hack enables
1320 * them again. Works at least with mouse driver */
1321 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1322 (portstatus & USB_PORT_STAT_CONNECTION) &&
1323 ((dev->children[i]))) {
1324 USB_HUB_PRINTF("already running port %i " \
1325 "disabled by hub (EMI?), " \
1326 "re-enabling...\n", i + 1);
1327 usb_hub_port_connect_change(dev, i);
1330 if (portstatus & USB_PORT_STAT_SUSPEND) {
1331 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1332 usb_clear_port_feature(dev, i + 1,
1333 USB_PORT_FEAT_SUSPEND);
1336 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1337 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1338 usb_clear_port_feature(dev, i + 1,
1339 USB_PORT_FEAT_C_OVER_CURRENT);
1340 usb_hub_power_on(hub);
1343 if (portchange & USB_PORT_STAT_C_RESET) {
1344 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1345 usb_clear_port_feature(dev, i + 1,
1346 USB_PORT_FEAT_C_RESET);
1348 } /* end for i all ports */
1353 int usb_hub_probe(struct usb_device *dev, int ifnum)
1355 struct usb_interface *iface;
1356 struct usb_endpoint_descriptor *ep;
1359 iface = &dev->config.if_desc[ifnum];
1361 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1363 /* Some hubs have a subclass of 1, which AFAICT according to the */
1364 /* specs is not defined, but it works */
1365 if ((iface->desc.bInterfaceSubClass != 0) &&
1366 (iface->desc.bInterfaceSubClass != 1))
1368 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1369 if (iface->desc.bNumEndpoints != 1)
1371 ep = &iface->ep_desc[0];
1372 /* Output endpoint? Curiousier and curiousier.. */
1373 if (!(ep->bEndpointAddress & USB_DIR_IN))
1375 /* If it's not an interrupt endpoint, we'd better punt! */
1376 if ((ep->bmAttributes & 3) != 3)
1378 /* We found a hub */
1379 USB_HUB_PRINTF("USB hub found\n");
1380 ret = usb_hub_configure(dev);