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>
61 #define USB_PRINTF(fmt, args...) printf(fmt , ##args)
63 #define USB_PRINTF(fmt, args...)
66 #define USB_BUFSIZ 512
68 static struct usb_device usb_dev[USB_MAX_DEVICE];
71 static int asynch_allowed;
72 static struct devrequest setup_packet;
74 char usb_started; /* flag for the started/stopped USB status */
76 /**********************************************************************
77 * some forward declerations...
79 void usb_scan_devices(void);
81 int usb_hub_probe(struct usb_device *dev, int ifnum);
82 void usb_hub_reset(void);
83 static int hub_port_reset(struct usb_device *dev, int port,
84 unsigned short *portstat);
86 /***********************************************************************
90 inline void wait_ms(unsigned long ms)
96 /***************************************************************************
108 /* init low_level USB */
110 result = usb_lowlevel_init();
111 /* if lowlevel init is OK, scan the bus for devices
112 * i.e. search HUBs and configure them */
114 printf("scanning bus for devices... ");
120 printf("Error, couldn't init Lowlevel part\n");
126 /******************************************************************************
127 * Stop USB this stops the LowLevel Part and deregisters USB devices.
137 res = usb_lowlevel_stop();
143 * disables the asynch behaviour of the control message. This is used for data
144 * transfers that uses the exclusiv access to the control and bulk messages.
146 void usb_disable_asynch(int disable)
148 asynch_allowed = !disable;
152 /*-------------------------------------------------------------------
158 * submits an Interrupt Message
160 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
161 void *buffer, int transfer_len, int interval)
163 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
167 * submits a control message and waits for comletion (at least timeout * 1ms)
168 * If timeout is 0, we don't wait for completion (used as example to set and
169 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
170 * allow control messages with 0 timeout, by previousely resetting the flag
171 * asynch_allowed (usb_disable_asynch(1)).
172 * returns the transfered length if OK or -1 if error. The transfered length
173 * and the current status are stored in the dev->act_len and dev->status.
175 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
176 unsigned char request, unsigned char requesttype,
177 unsigned short value, unsigned short index,
178 void *data, unsigned short size, int timeout)
180 if ((timeout == 0) && (!asynch_allowed)) {
181 /* request for a asynch control pipe is not allowed */
185 /* set setup command */
186 setup_packet.requesttype = requesttype;
187 setup_packet.request = request;
188 setup_packet.value = cpu_to_le16(value);
189 setup_packet.index = cpu_to_le16(index);
190 setup_packet.length = cpu_to_le16(size);
191 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
192 "value 0x%X index 0x%X length 0x%X\n",
193 request, requesttype, value, index, size);
194 dev->status = USB_ST_NOT_PROC; /*not yet processed */
196 submit_control_msg(dev, pipe, data, size, &setup_packet);
201 * Wait for status to update until timeout expires, USB driver
202 * interrupt handler may set the status when the USB operation has
206 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
217 /*-------------------------------------------------------------------
218 * submits bulk message, and waits for completion. returns 0 if Ok or
220 * synchronous behavior
222 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
223 void *data, int len, int *actual_length, int timeout)
227 dev->status = USB_ST_NOT_PROC; /*not yet processed */
228 submit_bulk_msg(dev, pipe, data, len);
230 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
234 *actual_length = dev->act_len;
235 if (dev->status == 0)
242 /*-------------------------------------------------------------------
247 * returns the max packet size, depending on the pipe direction and
248 * the configurations values
250 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
252 /* direction is out -> use emaxpacket out */
253 if ((pipe & USB_DIR_IN) == 0)
254 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
256 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
259 /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
260 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
261 * when it is inlined in 1 single routine. What happens is that the register r3
262 * is used as loop-count 'i', but gets overwritten later on.
263 * This is clearly a compiler bug, but it is easier to workaround it here than
264 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
265 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
267 static void __attribute__((noinline))
268 usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
272 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
274 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
275 USB_ENDPOINT_XFER_CONTROL) {
276 /* Control => bidirectional */
277 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
278 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
279 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
280 b, dev->epmaxpacketin[b]);
282 if ((ep->bEndpointAddress & 0x80) == 0) {
284 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
285 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
286 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
287 b, dev->epmaxpacketout[b]);
291 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
292 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
293 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
294 b, dev->epmaxpacketin[b]);
301 * set the max packed value of all endpoints in the given configuration
303 int usb_set_maxpacket(struct usb_device *dev)
307 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
308 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
309 usb_set_maxpacket_ep(dev,
310 &dev->config.if_desc[i].ep_desc[ii]);
315 /*******************************************************************************
316 * Parse the config, located in buffer, and fills the dev->config structure.
317 * Note that all little/big endian swapping are done automatically.
319 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
321 struct usb_descriptor_header *head;
322 int index, ifno, epno, curr_if_num;
330 dev->configno = cfgno;
331 head = (struct usb_descriptor_header *) &buffer[0];
332 if (head->bDescriptorType != USB_DT_CONFIG) {
333 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
334 head->bDescriptorType);
337 memcpy(&dev->config, buffer, buffer[0]);
338 le16_to_cpus(&(dev->config.desc.wTotalLength));
339 dev->config.no_of_if = 0;
341 index = dev->config.desc.bLength;
342 /* Ok the first entry must be a configuration entry,
343 * now process the others */
344 head = (struct usb_descriptor_header *) &buffer[index];
345 while (index + 1 < dev->config.desc.wTotalLength) {
346 switch (head->bDescriptorType) {
347 case USB_DT_INTERFACE:
348 if (((struct usb_interface_descriptor *) \
349 &buffer[index])->bInterfaceNumber != curr_if_num) {
350 /* this is a new interface, copy new desc */
351 ifno = dev->config.no_of_if;
352 dev->config.no_of_if++;
353 memcpy(&dev->config.if_desc[ifno],
354 &buffer[index], buffer[index]);
355 dev->config.if_desc[ifno].no_of_ep = 0;
356 dev->config.if_desc[ifno].num_altsetting = 1;
358 dev->config.if_desc[ifno].desc.bInterfaceNumber;
360 /* found alternate setting for the interface */
361 dev->config.if_desc[ifno].num_altsetting++;
364 case USB_DT_ENDPOINT:
365 epno = dev->config.if_desc[ifno].no_of_ep;
366 /* found an endpoint */
367 dev->config.if_desc[ifno].no_of_ep++;
368 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
369 &buffer[index], buffer[index]);
370 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
372 USB_PRINTF("if %d, ep %d\n", ifno, epno);
375 if (head->bLength == 0)
378 USB_PRINTF("unknown Description Type : %x\n",
379 head->bDescriptorType);
382 ch = (unsigned char *)head;
383 for (i = 0; i < head->bLength; i++)
384 USB_PRINTF("%02X ", *ch++);
385 USB_PRINTF("\n\n\n");
389 index += head->bLength;
390 head = (struct usb_descriptor_header *)&buffer[index];
395 /***********************************************************************
397 * endp: endpoint number in bits 0-3;
398 * direction flag in bit 7 (1 = IN, 0 = OUT)
400 int usb_clear_halt(struct usb_device *dev, int pipe)
403 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
405 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
406 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
407 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
409 /* don't clear if failed */
414 * NOTE: we do not get status and verify reset was successful
415 * as some devices are reported to lock up upon this check..
418 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
420 /* toggle is reset on clear */
421 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
426 /**********************************************************************
427 * get_descriptor type
429 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
430 unsigned char index, void *buf, int size)
433 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
434 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
435 (type << 8) + index, 0,
436 buf, size, USB_CNTL_TIMEOUT);
440 /**********************************************************************
441 * gets configuration cfgno and store it in the buffer
443 int usb_get_configuration_no(struct usb_device *dev,
444 unsigned char *buffer, int cfgno)
448 struct usb_configuration_descriptor *config;
450 config = (struct usb_configuration_descriptor *)&buffer[0];
451 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
454 printf("unable to get descriptor, error %lX\n",
457 printf("config descriptor too short " \
458 "(expected %i, got %i)\n", 9, result);
461 tmp = le16_to_cpu(config->wTotalLength);
463 if (tmp > USB_BUFSIZ) {
464 USB_PRINTF("usb_get_configuration_no: failed to get " \
465 "descriptor - too long: %d\n", tmp);
469 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
470 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
475 /********************************************************************
476 * set address of a device to the value in dev->devnum.
477 * This can only be done by addressing the device via the default address (0)
479 int usb_set_address(struct usb_device *dev)
483 USB_PRINTF("set address %d\n", dev->devnum);
484 res = usb_control_msg(dev, usb_snddefctrl(dev),
485 USB_REQ_SET_ADDRESS, 0,
487 NULL, 0, USB_CNTL_TIMEOUT);
491 /********************************************************************
492 * set interface number to interface
494 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
496 struct usb_interface *if_face = NULL;
499 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
500 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
501 if_face = &dev->config.if_desc[i];
506 printf("selecting invalid interface %d", interface);
510 * We should return now for devices with only one alternate setting.
511 * According to 9.4.10 of the Universal Serial Bus Specification
512 * Revision 2.0 such devices can return with a STALL. This results in
513 * some USB sticks timeouting during initialization and then being
514 * unusable in U-Boot.
516 if (if_face->num_altsetting == 1)
519 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
520 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
521 alternate, interface, NULL, 0,
522 USB_CNTL_TIMEOUT * 5);
529 /********************************************************************
530 * set configuration number to configuration
532 int usb_set_configuration(struct usb_device *dev, int configuration)
535 USB_PRINTF("set configuration %d\n", configuration);
536 /* set setup command */
537 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
538 USB_REQ_SET_CONFIGURATION, 0,
540 NULL, 0, USB_CNTL_TIMEOUT);
549 /********************************************************************
550 * set protocol to protocol
552 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
554 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
555 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
556 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
559 /********************************************************************
562 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
564 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
565 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
566 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
569 /********************************************************************
572 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
573 unsigned char id, void *buf, int size)
575 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
577 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
578 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
581 /********************************************************************
582 * get class descriptor
584 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
585 unsigned char type, unsigned char id, void *buf, int size)
587 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
588 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
589 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
592 /********************************************************************
593 * get string index in buffer
595 int usb_get_string(struct usb_device *dev, unsigned short langid,
596 unsigned char index, void *buf, int size)
601 for (i = 0; i < 3; ++i) {
602 /* some devices are flaky */
603 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
604 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
605 (USB_DT_STRING << 8) + index, langid, buf, size,
616 static void usb_try_string_workarounds(unsigned char *buf, int *length)
618 int newlength, oldlength = *length;
620 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
621 if (!isprint(buf[newlength]) || buf[newlength + 1])
631 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
632 unsigned int index, unsigned char *buf)
636 /* Try to read the string descriptor by asking for the maximum
637 * possible number of bytes */
638 rc = usb_get_string(dev, langid, index, buf, 255);
640 /* If that failed try to read the descriptor length, then
641 * ask for just that many bytes */
643 rc = usb_get_string(dev, langid, index, buf, 2);
645 rc = usb_get_string(dev, langid, index, buf, buf[0]);
649 if (!buf[0] && !buf[1])
650 usb_try_string_workarounds(buf, &rc);
652 /* There might be extra junk at the end of the descriptor */
656 rc = rc - (rc & 1); /* force a multiple of two */
666 /********************************************************************
668 * Get string index and translate it to ascii.
669 * returns string length (> 0) or error (< 0)
671 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
673 unsigned char mybuf[USB_BUFSIZ];
678 if (size <= 0 || !buf || !index)
683 /* get langid for strings if it's not yet known */
684 if (!dev->have_langid) {
685 err = usb_string_sub(dev, 0, 0, tbuf);
687 USB_PRINTF("error getting string descriptor 0 " \
688 "(error=%lx)\n", dev->status);
690 } else if (tbuf[0] < 4) {
691 USB_PRINTF("string descriptor 0 too short\n");
694 dev->have_langid = -1;
695 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
696 /* always use the first langid listed */
697 USB_PRINTF("USB device number %d default " \
698 "language ID 0x%x\n",
699 dev->devnum, dev->string_langid);
703 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
707 size--; /* leave room for trailing NULL char in output buffer */
708 for (idx = 0, u = 2; u < err; u += 2) {
711 if (tbuf[u+1]) /* high byte */
712 buf[idx++] = '?'; /* non-ASCII character */
714 buf[idx++] = tbuf[u];
722 /********************************************************************
723 * USB device handling:
724 * the USB device are static allocated [USB_MAX_DEVICE].
728 /* returns a pointer to the device with the index [index].
729 * if the device is not assigned (dev->devnum==-1) returns NULL
731 struct usb_device *usb_get_dev_index(int index)
733 if (usb_dev[index].devnum == -1)
736 return &usb_dev[index];
740 /* returns a pointer of a new device structure or NULL, if
741 * no device struct is available
743 struct usb_device *usb_alloc_new_device(void)
746 USB_PRINTF("New Device %d\n", dev_index);
747 if (dev_index == USB_MAX_DEVICE) {
748 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
751 /* default Address is 0, real addresses start with 1 */
752 usb_dev[dev_index].devnum = dev_index + 1;
753 usb_dev[dev_index].maxchild = 0;
754 for (i = 0; i < USB_MAXCHILDREN; i++)
755 usb_dev[dev_index].children[i] = NULL;
756 usb_dev[dev_index].parent = NULL;
758 return &usb_dev[dev_index - 1];
763 * By the time we get here, the device has gotten a new device ID
764 * and is in the default state. We need to identify the thing and
765 * get the ball rolling..
767 * Returns 0 for success, != 0 for error.
769 int usb_new_device(struct usb_device *dev)
773 unsigned char tmpbuf[USB_BUFSIZ];
775 /* We still haven't set the Address yet */
779 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
780 /* this is the old and known way of initializing devices, it is
781 * different than what Windows and Linux are doing. Windows and Linux
782 * both retrieve 64 bytes while reading the device descriptor
783 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
784 * invalid header while reading 8 bytes as device descriptor. */
785 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
786 dev->maxpacketsize = PACKET_SIZE_8;
787 dev->epmaxpacketin[0] = 8;
788 dev->epmaxpacketout[0] = 8;
790 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
792 printf("\n USB device not responding, " \
793 "giving up (status=%lX)\n", dev->status);
797 /* This is a Windows scheme of initialization sequence, with double
798 * reset of the device (Linux uses the same sequence)
799 * Some equipment is said to work only with such init sequence; this
800 * patch is based on the work by Alan Stern:
801 * http://sourceforge.net/mailarchive/forum.php?
802 * thread_id=5729457&forum_id=5398
804 struct usb_device_descriptor *desc;
806 struct usb_device *parent = dev->parent;
807 unsigned short portstatus;
809 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
810 * only 18 bytes long, this will terminate with a short packet. But if
811 * the maxpacket size is 8 or 16 the device may be waiting to transmit
812 * some more, or keeps on retransmitting the 8 byte header. */
814 desc = (struct usb_device_descriptor *)tmpbuf;
815 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
816 /* Default to 64 byte max packet size */
817 dev->maxpacketsize = PACKET_SIZE_64;
818 dev->epmaxpacketin[0] = 64;
819 dev->epmaxpacketout[0] = 64;
821 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
823 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
827 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
829 /* find the port number we're at */
833 for (j = 0; j < parent->maxchild; j++) {
834 if (parent->children[j] == dev) {
840 printf("usb_new_device:cannot locate device's port.\n");
844 /* reset the port for the second time */
845 err = hub_port_reset(dev->parent, port, &portstatus);
847 printf("\n Couldn't reset port %i\n", port);
853 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
854 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
855 switch (dev->descriptor.bMaxPacketSize0) {
857 dev->maxpacketsize = PACKET_SIZE_8;
860 dev->maxpacketsize = PACKET_SIZE_16;
863 dev->maxpacketsize = PACKET_SIZE_32;
866 dev->maxpacketsize = PACKET_SIZE_64;
871 err = usb_set_address(dev); /* set address */
874 printf("\n USB device not accepting new address " \
875 "(error=%lX)\n", dev->status);
879 wait_ms(10); /* Let the SET_ADDRESS settle */
881 tmp = sizeof(dev->descriptor);
883 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
884 &dev->descriptor, sizeof(dev->descriptor));
887 printf("unable to get device descriptor (error=%d)\n",
890 printf("USB device descriptor short read " \
891 "(expected %i, got %i)\n", tmp, err);
894 /* correct le values */
895 le16_to_cpus(&dev->descriptor.bcdUSB);
896 le16_to_cpus(&dev->descriptor.idVendor);
897 le16_to_cpus(&dev->descriptor.idProduct);
898 le16_to_cpus(&dev->descriptor.bcdDevice);
899 /* only support for one config for now */
900 usb_get_configuration_no(dev, &tmpbuf[0], 0);
901 usb_parse_config(dev, &tmpbuf[0], 0);
902 usb_set_maxpacket(dev);
903 /* we set the default configuration here */
904 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
905 printf("failed to set default configuration " \
906 "len %d, status %lX\n", dev->act_len, dev->status);
909 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
910 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
911 dev->descriptor.iSerialNumber);
912 memset(dev->mf, 0, sizeof(dev->mf));
913 memset(dev->prod, 0, sizeof(dev->prod));
914 memset(dev->serial, 0, sizeof(dev->serial));
915 if (dev->descriptor.iManufacturer)
916 usb_string(dev, dev->descriptor.iManufacturer,
917 dev->mf, sizeof(dev->mf));
918 if (dev->descriptor.iProduct)
919 usb_string(dev, dev->descriptor.iProduct,
920 dev->prod, sizeof(dev->prod));
921 if (dev->descriptor.iSerialNumber)
922 usb_string(dev, dev->descriptor.iSerialNumber,
923 dev->serial, sizeof(dev->serial));
924 USB_PRINTF("Manufacturer %s\n", dev->mf);
925 USB_PRINTF("Product %s\n", dev->prod);
926 USB_PRINTF("SerialNumber %s\n", dev->serial);
927 /* now prode if the device is a hub */
928 usb_hub_probe(dev, 0);
932 /* build device Tree */
933 void usb_scan_devices(void)
936 struct usb_device *dev;
938 /* first make all devices unknown */
939 for (i = 0; i < USB_MAX_DEVICE; i++) {
940 memset(&usb_dev[i], 0, sizeof(struct usb_device));
941 usb_dev[i].devnum = -1;
944 /* device 0 is always present (root hub, so let it analyze) */
945 dev = usb_alloc_new_device();
946 if (usb_new_device(dev))
947 printf("No USB Device found\n");
949 printf("%d USB Device(s) found\n", dev_index);
950 /* insert "driver" if possible */
951 #ifdef CONFIG_USB_KEYBOARD
953 USB_PRINTF("scan end\n");
958 /****************************************************************************
960 * Probes device for being a hub and configurate it
966 #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
968 #define USB_HUB_PRINTF(fmt, args...)
972 static struct usb_hub_device hub_dev[USB_MAX_HUB];
973 static int usb_hub_index;
976 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
978 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
979 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
980 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
983 int usb_clear_hub_feature(struct usb_device *dev, int feature)
985 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
986 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
987 0, NULL, 0, USB_CNTL_TIMEOUT);
990 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
992 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
993 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
994 port, NULL, 0, USB_CNTL_TIMEOUT);
997 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
999 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1000 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
1001 port, NULL, 0, USB_CNTL_TIMEOUT);
1004 int usb_get_hub_status(struct usb_device *dev, void *data)
1006 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1007 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1008 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1011 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1013 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1014 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1015 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1019 static void usb_hub_power_on(struct usb_hub_device *hub)
1022 struct usb_device *dev;
1024 dev = hub->pusb_dev;
1025 /* Enable power to the ports */
1026 USB_HUB_PRINTF("enabling power on all ports\n");
1027 for (i = 0; i < dev->maxchild; i++) {
1028 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1029 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1030 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1034 void usb_hub_reset(void)
1039 struct usb_hub_device *usb_hub_allocate(void)
1041 if (usb_hub_index < USB_MAX_HUB)
1042 return &hub_dev[usb_hub_index++];
1044 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1050 static inline char *portspeed(int portstatus)
1052 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1054 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1060 static int hub_port_reset(struct usb_device *dev, int port,
1061 unsigned short *portstat)
1064 struct usb_port_status portsts;
1065 unsigned short portstatus, portchange;
1067 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1068 for (tries = 0; tries < MAX_TRIES; tries++) {
1070 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1073 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1074 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1078 portstatus = le16_to_cpu(portsts.wPortStatus);
1079 portchange = le16_to_cpu(portsts.wPortChange);
1081 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1082 portstatus, portchange,
1083 portspeed(portstatus));
1085 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1086 " USB_PORT_STAT_ENABLE %d\n",
1087 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1088 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1089 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1091 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1092 !(portstatus & USB_PORT_STAT_CONNECTION))
1095 if (portstatus & USB_PORT_STAT_ENABLE)
1101 if (tries == MAX_TRIES) {
1102 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1103 "disabling port.\n", port + 1, MAX_TRIES);
1104 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1108 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1109 *portstat = portstatus;
1114 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1116 struct usb_device *usb;
1117 struct usb_port_status portsts;
1118 unsigned short portstatus, portchange;
1121 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1122 USB_HUB_PRINTF("get_port_status failed\n");
1126 portstatus = le16_to_cpu(portsts.wPortStatus);
1127 portchange = le16_to_cpu(portsts.wPortChange);
1128 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1129 portstatus, portchange, portspeed(portstatus));
1131 /* Clear the connection change status */
1132 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1134 /* Disconnect any existing devices under this port */
1135 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1136 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1137 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1138 /* Return now if nothing is connected */
1139 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1144 /* Reset the port */
1145 if (hub_port_reset(dev, port, &portstatus) < 0) {
1146 printf("cannot reset port %i!?\n", port + 1);
1152 /* Allocate a new device struct for it */
1153 usb = usb_alloc_new_device();
1155 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1156 usb->speed = USB_SPEED_HIGH;
1157 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1158 usb->speed = USB_SPEED_LOW;
1160 usb->speed = USB_SPEED_FULL;
1162 dev->children[port] = usb;
1164 /* Run it through the hoops (find a driver, etc) */
1165 if (usb_new_device(usb)) {
1166 /* Woops, disable the port */
1167 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1168 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1173 int usb_hub_configure(struct usb_device *dev)
1175 unsigned char buffer[USB_BUFSIZ], *bitmap;
1176 struct usb_hub_descriptor *descriptor;
1177 struct usb_hub_status *hubsts;
1179 struct usb_hub_device *hub;
1181 /* "allocate" Hub device */
1182 hub = usb_hub_allocate();
1185 hub->pusb_dev = dev;
1186 /* Get the the hub descriptor */
1187 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1188 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1189 "descriptor, giving up %lX\n", dev->status);
1192 descriptor = (struct usb_hub_descriptor *)buffer;
1194 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1195 i = descriptor->bLength;
1196 if (i > USB_BUFSIZ) {
1197 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1198 "descriptor - too long: %d\n",
1199 descriptor->bLength);
1203 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1204 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1205 "descriptor 2nd giving up %lX\n", dev->status);
1208 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1209 /* adjust 16bit values */
1210 hub->desc.wHubCharacteristics =
1211 le16_to_cpu(descriptor->wHubCharacteristics);
1212 /* set the bitmap */
1213 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1214 /* devices not removable by default */
1215 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1216 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1217 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1219 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1220 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1222 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1223 hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
1225 dev->maxchild = descriptor->bNbrPorts;
1226 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1228 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1230 USB_HUB_PRINTF("ganged power switching\n");
1233 USB_HUB_PRINTF("individual port power switching\n");
1237 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1241 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1242 USB_HUB_PRINTF("part of a compound device\n");
1244 USB_HUB_PRINTF("standalone hub\n");
1246 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1248 USB_HUB_PRINTF("global over-current protection\n");
1251 USB_HUB_PRINTF("individual port over-current protection\n");
1255 USB_HUB_PRINTF("no over-current protection\n");
1259 USB_HUB_PRINTF("power on to power good time: %dms\n",
1260 descriptor->bPwrOn2PwrGood * 2);
1261 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1262 descriptor->bHubContrCurrent);
1264 for (i = 0; i < dev->maxchild; i++)
1265 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1266 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1267 (1 << ((i + 1) % 8)) ? " not" : "");
1269 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1270 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1271 "too long: %d\n", descriptor->bLength);
1275 if (usb_get_hub_status(dev, buffer) < 0) {
1276 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1281 hubsts = (struct usb_hub_status *)buffer;
1282 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1283 le16_to_cpu(hubsts->wHubStatus),
1284 le16_to_cpu(hubsts->wHubChange));
1285 USB_HUB_PRINTF("local power source is %s\n",
1286 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1287 "lost (inactive)" : "good");
1288 USB_HUB_PRINTF("%sover-current condition exists\n",
1289 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1291 usb_hub_power_on(hub);
1293 for (i = 0; i < dev->maxchild; i++) {
1294 struct usb_port_status portsts;
1295 unsigned short portstatus, portchange;
1297 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1298 USB_HUB_PRINTF("get_port_status failed\n");
1302 portstatus = le16_to_cpu(portsts.wPortStatus);
1303 portchange = le16_to_cpu(portsts.wPortChange);
1304 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1305 i + 1, portstatus, portchange);
1307 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1308 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1309 usb_hub_port_connect_change(dev, i);
1311 if (portchange & USB_PORT_STAT_C_ENABLE) {
1312 USB_HUB_PRINTF("port %d enable change, status %x\n",
1314 usb_clear_port_feature(dev, i + 1,
1315 USB_PORT_FEAT_C_ENABLE);
1317 /* EM interference sometimes causes bad shielded USB
1318 * devices to be shutdown by the hub, this hack enables
1319 * them again. Works at least with mouse driver */
1320 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1321 (portstatus & USB_PORT_STAT_CONNECTION) &&
1322 ((dev->children[i]))) {
1323 USB_HUB_PRINTF("already running port %i " \
1324 "disabled by hub (EMI?), " \
1325 "re-enabling...\n", i + 1);
1326 usb_hub_port_connect_change(dev, i);
1329 if (portstatus & USB_PORT_STAT_SUSPEND) {
1330 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1331 usb_clear_port_feature(dev, i + 1,
1332 USB_PORT_FEAT_SUSPEND);
1335 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1336 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1337 usb_clear_port_feature(dev, i + 1,
1338 USB_PORT_FEAT_C_OVER_CURRENT);
1339 usb_hub_power_on(hub);
1342 if (portchange & USB_PORT_STAT_C_RESET) {
1343 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1344 usb_clear_port_feature(dev, i + 1,
1345 USB_PORT_FEAT_C_RESET);
1347 } /* end for i all ports */
1352 int usb_hub_probe(struct usb_device *dev, int ifnum)
1354 struct usb_interface *iface;
1355 struct usb_endpoint_descriptor *ep;
1358 iface = &dev->config.if_desc[ifnum];
1360 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1362 /* Some hubs have a subclass of 1, which AFAICT according to the */
1363 /* specs is not defined, but it works */
1364 if ((iface->desc.bInterfaceSubClass != 0) &&
1365 (iface->desc.bInterfaceSubClass != 1))
1367 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1368 if (iface->desc.bNumEndpoints != 1)
1370 ep = &iface->ep_desc[0];
1371 /* Output endpoint? Curiousier and curiousier.. */
1372 if (!(ep->bEndpointAddress & USB_DIR_IN))
1374 /* If it's not an interrupt endpoint, we'd better punt! */
1375 if ((ep->bmAttributes & 3) != 3)
1377 /* We found a hub */
1378 USB_HUB_PRINTF("USB hub found\n");
1379 ret = usb_hub_configure(dev);