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);
200 if (dev->status != 0) {
202 * Let's wait a while for the timeout to elapse.
203 * It has no real use, but it keeps the interface happy.
212 /*-------------------------------------------------------------------
213 * submits bulk message, and waits for completion. returns 0 if Ok or
215 * synchronous behavior
217 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
218 void *data, int len, int *actual_length, int timeout)
222 dev->status = USB_ST_NOT_PROC; /*not yet processed */
223 submit_bulk_msg(dev, pipe, data, len);
225 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
229 *actual_length = dev->act_len;
230 if (dev->status == 0)
237 /*-------------------------------------------------------------------
242 * returns the max packet size, depending on the pipe direction and
243 * the configurations values
245 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
247 /* direction is out -> use emaxpacket out */
248 if ((pipe & USB_DIR_IN) == 0)
249 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
251 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
254 /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
255 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
256 * when it is inlined in 1 single routine. What happens is that the register r3
257 * is used as loop-count 'i', but gets overwritten later on.
258 * This is clearly a compiler bug, but it is easier to workaround it here than
259 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
260 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
262 static void __attribute__((noinline))
263 usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
267 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
269 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
270 USB_ENDPOINT_XFER_CONTROL) {
271 /* Control => bidirectional */
272 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
273 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
274 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
275 b, dev->epmaxpacketin[b]);
277 if ((ep->bEndpointAddress & 0x80) == 0) {
279 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
280 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
281 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
282 b, dev->epmaxpacketout[b]);
286 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
287 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
288 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
289 b, dev->epmaxpacketin[b]);
296 * set the max packed value of all endpoints in the given configuration
298 int usb_set_maxpacket(struct usb_device *dev)
302 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
303 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
304 usb_set_maxpacket_ep(dev,
305 &dev->config.if_desc[i].ep_desc[ii]);
310 /*******************************************************************************
311 * Parse the config, located in buffer, and fills the dev->config structure.
312 * Note that all little/big endian swapping are done automatically.
314 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
316 struct usb_descriptor_header *head;
317 int index, ifno, epno, curr_if_num;
325 dev->configno = cfgno;
326 head = (struct usb_descriptor_header *) &buffer[0];
327 if (head->bDescriptorType != USB_DT_CONFIG) {
328 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
329 head->bDescriptorType);
332 memcpy(&dev->config, buffer, buffer[0]);
333 le16_to_cpus(&(dev->config.desc.wTotalLength));
334 dev->config.no_of_if = 0;
336 index = dev->config.desc.bLength;
337 /* Ok the first entry must be a configuration entry,
338 * now process the others */
339 head = (struct usb_descriptor_header *) &buffer[index];
340 while (index + 1 < dev->config.desc.wTotalLength) {
341 switch (head->bDescriptorType) {
342 case USB_DT_INTERFACE:
343 if (((struct usb_interface_descriptor *) \
344 &buffer[index])->bInterfaceNumber != curr_if_num) {
345 /* this is a new interface, copy new desc */
346 ifno = dev->config.no_of_if;
347 dev->config.no_of_if++;
348 memcpy(&dev->config.if_desc[ifno],
349 &buffer[index], buffer[index]);
350 dev->config.if_desc[ifno].no_of_ep = 0;
351 dev->config.if_desc[ifno].num_altsetting = 1;
353 dev->config.if_desc[ifno].desc.bInterfaceNumber;
355 /* found alternate setting for the interface */
356 dev->config.if_desc[ifno].num_altsetting++;
359 case USB_DT_ENDPOINT:
360 epno = dev->config.if_desc[ifno].no_of_ep;
361 /* found an endpoint */
362 dev->config.if_desc[ifno].no_of_ep++;
363 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
364 &buffer[index], buffer[index]);
365 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
367 USB_PRINTF("if %d, ep %d\n", ifno, epno);
370 if (head->bLength == 0)
373 USB_PRINTF("unknown Description Type : %x\n",
374 head->bDescriptorType);
377 ch = (unsigned char *)head;
378 for (i = 0; i < head->bLength; i++)
379 USB_PRINTF("%02X ", *ch++);
380 USB_PRINTF("\n\n\n");
384 index += head->bLength;
385 head = (struct usb_descriptor_header *)&buffer[index];
390 /***********************************************************************
392 * endp: endpoint number in bits 0-3;
393 * direction flag in bit 7 (1 = IN, 0 = OUT)
395 int usb_clear_halt(struct usb_device *dev, int pipe)
398 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
400 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
401 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
402 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
404 /* don't clear if failed */
409 * NOTE: we do not get status and verify reset was successful
410 * as some devices are reported to lock up upon this check..
413 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
415 /* toggle is reset on clear */
416 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
421 /**********************************************************************
422 * get_descriptor type
424 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
425 unsigned char index, void *buf, int size)
428 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
429 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
430 (type << 8) + index, 0,
431 buf, size, USB_CNTL_TIMEOUT);
435 /**********************************************************************
436 * gets configuration cfgno and store it in the buffer
438 int usb_get_configuration_no(struct usb_device *dev,
439 unsigned char *buffer, int cfgno)
443 struct usb_configuration_descriptor *config;
445 config = (struct usb_configuration_descriptor *)&buffer[0];
446 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
449 printf("unable to get descriptor, error %lX\n",
452 printf("config descriptor too short " \
453 "(expected %i, got %i)\n", 9, result);
456 tmp = le16_to_cpu(config->wTotalLength);
458 if (tmp > USB_BUFSIZ) {
459 USB_PRINTF("usb_get_configuration_no: failed to get " \
460 "descriptor - too long: %d\n", tmp);
464 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
465 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
470 /********************************************************************
471 * set address of a device to the value in dev->devnum.
472 * This can only be done by addressing the device via the default address (0)
474 int usb_set_address(struct usb_device *dev)
478 USB_PRINTF("set address %d\n", dev->devnum);
479 res = usb_control_msg(dev, usb_snddefctrl(dev),
480 USB_REQ_SET_ADDRESS, 0,
482 NULL, 0, USB_CNTL_TIMEOUT);
486 /********************************************************************
487 * set interface number to interface
489 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
491 struct usb_interface *if_face = NULL;
494 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
495 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
496 if_face = &dev->config.if_desc[i];
501 printf("selecting invalid interface %d", interface);
505 * We should return now for devices with only one alternate setting.
506 * According to 9.4.10 of the Universal Serial Bus Specification
507 * Revision 2.0 such devices can return with a STALL. This results in
508 * some USB sticks timeouting during initialization and then being
509 * unusable in U-Boot.
511 if (if_face->num_altsetting == 1)
514 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
515 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
516 alternate, interface, NULL, 0,
517 USB_CNTL_TIMEOUT * 5);
524 /********************************************************************
525 * set configuration number to configuration
527 int usb_set_configuration(struct usb_device *dev, int configuration)
530 USB_PRINTF("set configuration %d\n", configuration);
531 /* set setup command */
532 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
533 USB_REQ_SET_CONFIGURATION, 0,
535 NULL, 0, USB_CNTL_TIMEOUT);
544 /********************************************************************
545 * set protocol to protocol
547 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
549 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
550 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
551 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
554 /********************************************************************
557 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
559 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
560 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
561 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
564 /********************************************************************
567 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
568 unsigned char id, void *buf, int size)
570 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
572 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
573 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
576 /********************************************************************
577 * get class descriptor
579 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
580 unsigned char type, unsigned char id, void *buf, int size)
582 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
583 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
584 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
587 /********************************************************************
588 * get string index in buffer
590 int usb_get_string(struct usb_device *dev, unsigned short langid,
591 unsigned char index, void *buf, int size)
596 for (i = 0; i < 3; ++i) {
597 /* some devices are flaky */
598 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
599 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
600 (USB_DT_STRING << 8) + index, langid, buf, size,
611 static void usb_try_string_workarounds(unsigned char *buf, int *length)
613 int newlength, oldlength = *length;
615 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
616 if (!isprint(buf[newlength]) || buf[newlength + 1])
626 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
627 unsigned int index, unsigned char *buf)
631 /* Try to read the string descriptor by asking for the maximum
632 * possible number of bytes */
633 rc = usb_get_string(dev, langid, index, buf, 255);
635 /* If that failed try to read the descriptor length, then
636 * ask for just that many bytes */
638 rc = usb_get_string(dev, langid, index, buf, 2);
640 rc = usb_get_string(dev, langid, index, buf, buf[0]);
644 if (!buf[0] && !buf[1])
645 usb_try_string_workarounds(buf, &rc);
647 /* There might be extra junk at the end of the descriptor */
651 rc = rc - (rc & 1); /* force a multiple of two */
661 /********************************************************************
663 * Get string index and translate it to ascii.
664 * returns string length (> 0) or error (< 0)
666 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
668 unsigned char mybuf[USB_BUFSIZ];
673 if (size <= 0 || !buf || !index)
678 /* get langid for strings if it's not yet known */
679 if (!dev->have_langid) {
680 err = usb_string_sub(dev, 0, 0, tbuf);
682 USB_PRINTF("error getting string descriptor 0 " \
683 "(error=%lx)\n", dev->status);
685 } else if (tbuf[0] < 4) {
686 USB_PRINTF("string descriptor 0 too short\n");
689 dev->have_langid = -1;
690 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
691 /* always use the first langid listed */
692 USB_PRINTF("USB device number %d default " \
693 "language ID 0x%x\n",
694 dev->devnum, dev->string_langid);
698 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
702 size--; /* leave room for trailing NULL char in output buffer */
703 for (idx = 0, u = 2; u < err; u += 2) {
706 if (tbuf[u+1]) /* high byte */
707 buf[idx++] = '?'; /* non-ASCII character */
709 buf[idx++] = tbuf[u];
717 /********************************************************************
718 * USB device handling:
719 * the USB device are static allocated [USB_MAX_DEVICE].
723 /* returns a pointer to the device with the index [index].
724 * if the device is not assigned (dev->devnum==-1) returns NULL
726 struct usb_device *usb_get_dev_index(int index)
728 if (usb_dev[index].devnum == -1)
731 return &usb_dev[index];
735 /* returns a pointer of a new device structure or NULL, if
736 * no device struct is available
738 struct usb_device *usb_alloc_new_device(void)
741 USB_PRINTF("New Device %d\n", dev_index);
742 if (dev_index == USB_MAX_DEVICE) {
743 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
746 /* default Address is 0, real addresses start with 1 */
747 usb_dev[dev_index].devnum = dev_index + 1;
748 usb_dev[dev_index].maxchild = 0;
749 for (i = 0; i < USB_MAXCHILDREN; i++)
750 usb_dev[dev_index].children[i] = NULL;
751 usb_dev[dev_index].parent = NULL;
753 return &usb_dev[dev_index - 1];
758 * By the time we get here, the device has gotten a new device ID
759 * and is in the default state. We need to identify the thing and
760 * get the ball rolling..
762 * Returns 0 for success, != 0 for error.
764 int usb_new_device(struct usb_device *dev)
768 unsigned char tmpbuf[USB_BUFSIZ];
770 /* We still haven't set the Address yet */
774 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
775 /* this is the old and known way of initializing devices, it is
776 * different than what Windows and Linux are doing. Windows and Linux
777 * both retrieve 64 bytes while reading the device descriptor
778 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
779 * invalid header while reading 8 bytes as device descriptor. */
780 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
781 dev->maxpacketsize = PACKET_SIZE_8;
782 dev->epmaxpacketin[0] = 8;
783 dev->epmaxpacketout[0] = 8;
785 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
787 printf("\n USB device not responding, " \
788 "giving up (status=%lX)\n", dev->status);
792 /* This is a Windows scheme of initialization sequence, with double
793 * reset of the device (Linux uses the same sequence)
794 * Some equipment is said to work only with such init sequence; this
795 * patch is based on the work by Alan Stern:
796 * http://sourceforge.net/mailarchive/forum.php?
797 * thread_id=5729457&forum_id=5398
799 struct usb_device_descriptor *desc;
801 struct usb_device *parent = dev->parent;
802 unsigned short portstatus;
804 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
805 * only 18 bytes long, this will terminate with a short packet. But if
806 * the maxpacket size is 8 or 16 the device may be waiting to transmit
807 * some more, or keeps on retransmitting the 8 byte header. */
809 desc = (struct usb_device_descriptor *)tmpbuf;
810 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
811 /* Default to 64 byte max packet size */
812 dev->maxpacketsize = PACKET_SIZE_64;
813 dev->epmaxpacketin[0] = 64;
814 dev->epmaxpacketout[0] = 64;
816 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
818 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
822 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
824 /* find the port number we're at */
828 for (j = 0; j < parent->maxchild; j++) {
829 if (parent->children[j] == dev) {
835 printf("usb_new_device:cannot locate device's port.\n");
839 /* reset the port for the second time */
840 err = hub_port_reset(dev->parent, port, &portstatus);
842 printf("\n Couldn't reset port %i\n", port);
848 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
849 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
850 switch (dev->descriptor.bMaxPacketSize0) {
852 dev->maxpacketsize = PACKET_SIZE_8;
855 dev->maxpacketsize = PACKET_SIZE_16;
858 dev->maxpacketsize = PACKET_SIZE_32;
861 dev->maxpacketsize = PACKET_SIZE_64;
866 err = usb_set_address(dev); /* set address */
869 printf("\n USB device not accepting new address " \
870 "(error=%lX)\n", dev->status);
874 wait_ms(10); /* Let the SET_ADDRESS settle */
876 tmp = sizeof(dev->descriptor);
878 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
879 &dev->descriptor, sizeof(dev->descriptor));
882 printf("unable to get device descriptor (error=%d)\n",
885 printf("USB device descriptor short read " \
886 "(expected %i, got %i)\n", tmp, err);
889 /* correct le values */
890 le16_to_cpus(&dev->descriptor.bcdUSB);
891 le16_to_cpus(&dev->descriptor.idVendor);
892 le16_to_cpus(&dev->descriptor.idProduct);
893 le16_to_cpus(&dev->descriptor.bcdDevice);
894 /* only support for one config for now */
895 usb_get_configuration_no(dev, &tmpbuf[0], 0);
896 usb_parse_config(dev, &tmpbuf[0], 0);
897 usb_set_maxpacket(dev);
898 /* we set the default configuration here */
899 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
900 printf("failed to set default configuration " \
901 "len %d, status %lX\n", dev->act_len, dev->status);
904 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
905 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
906 dev->descriptor.iSerialNumber);
907 memset(dev->mf, 0, sizeof(dev->mf));
908 memset(dev->prod, 0, sizeof(dev->prod));
909 memset(dev->serial, 0, sizeof(dev->serial));
910 if (dev->descriptor.iManufacturer)
911 usb_string(dev, dev->descriptor.iManufacturer,
912 dev->mf, sizeof(dev->mf));
913 if (dev->descriptor.iProduct)
914 usb_string(dev, dev->descriptor.iProduct,
915 dev->prod, sizeof(dev->prod));
916 if (dev->descriptor.iSerialNumber)
917 usb_string(dev, dev->descriptor.iSerialNumber,
918 dev->serial, sizeof(dev->serial));
919 USB_PRINTF("Manufacturer %s\n", dev->mf);
920 USB_PRINTF("Product %s\n", dev->prod);
921 USB_PRINTF("SerialNumber %s\n", dev->serial);
922 /* now prode if the device is a hub */
923 usb_hub_probe(dev, 0);
927 /* build device Tree */
928 void usb_scan_devices(void)
931 struct usb_device *dev;
933 /* first make all devices unknown */
934 for (i = 0; i < USB_MAX_DEVICE; i++) {
935 memset(&usb_dev[i], 0, sizeof(struct usb_device));
936 usb_dev[i].devnum = -1;
939 /* device 0 is always present (root hub, so let it analyze) */
940 dev = usb_alloc_new_device();
941 if (usb_new_device(dev))
942 printf("No USB Device found\n");
944 printf("%d USB Device(s) found\n", dev_index);
945 /* insert "driver" if possible */
946 #ifdef CONFIG_USB_KEYBOARD
948 USB_PRINTF("scan end\n");
953 /****************************************************************************
955 * Probes device for being a hub and configurate it
961 #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
963 #define USB_HUB_PRINTF(fmt, args...)
967 static struct usb_hub_device hub_dev[USB_MAX_HUB];
968 static int usb_hub_index;
971 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
973 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
974 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
975 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
978 int usb_clear_hub_feature(struct usb_device *dev, int feature)
980 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
981 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
982 0, NULL, 0, USB_CNTL_TIMEOUT);
985 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
987 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
988 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
989 port, NULL, 0, USB_CNTL_TIMEOUT);
992 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
994 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
995 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
996 port, NULL, 0, USB_CNTL_TIMEOUT);
999 int usb_get_hub_status(struct usb_device *dev, void *data)
1001 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1002 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1003 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1006 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1008 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1009 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1010 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1014 static void usb_hub_power_on(struct usb_hub_device *hub)
1017 struct usb_device *dev;
1019 dev = hub->pusb_dev;
1020 /* Enable power to the ports */
1021 USB_HUB_PRINTF("enabling power on all ports\n");
1022 for (i = 0; i < dev->maxchild; i++) {
1023 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1024 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1025 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1029 void usb_hub_reset(void)
1034 struct usb_hub_device *usb_hub_allocate(void)
1036 if (usb_hub_index < USB_MAX_HUB)
1037 return &hub_dev[usb_hub_index++];
1039 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1045 static inline char *portspeed(int portstatus)
1047 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1049 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1055 static int hub_port_reset(struct usb_device *dev, int port,
1056 unsigned short *portstat)
1059 struct usb_port_status portsts;
1060 unsigned short portstatus, portchange;
1062 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1063 for (tries = 0; tries < MAX_TRIES; tries++) {
1065 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1068 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1069 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1073 portstatus = le16_to_cpu(portsts.wPortStatus);
1074 portchange = le16_to_cpu(portsts.wPortChange);
1076 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1077 portstatus, portchange,
1078 portspeed(portstatus));
1080 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1081 " USB_PORT_STAT_ENABLE %d\n",
1082 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1083 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1084 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1086 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1087 !(portstatus & USB_PORT_STAT_CONNECTION))
1090 if (portstatus & USB_PORT_STAT_ENABLE)
1096 if (tries == MAX_TRIES) {
1097 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1098 "disabling port.\n", port + 1, MAX_TRIES);
1099 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1103 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1104 *portstat = portstatus;
1109 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1111 struct usb_device *usb;
1112 struct usb_port_status portsts;
1113 unsigned short portstatus, portchange;
1116 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1117 USB_HUB_PRINTF("get_port_status failed\n");
1121 portstatus = le16_to_cpu(portsts.wPortStatus);
1122 portchange = le16_to_cpu(portsts.wPortChange);
1123 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1124 portstatus, portchange, portspeed(portstatus));
1126 /* Clear the connection change status */
1127 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1129 /* Disconnect any existing devices under this port */
1130 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1131 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1132 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1133 /* Return now if nothing is connected */
1134 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1139 /* Reset the port */
1140 if (hub_port_reset(dev, port, &portstatus) < 0) {
1141 printf("cannot reset port %i!?\n", port + 1);
1147 /* Allocate a new device struct for it */
1148 usb = usb_alloc_new_device();
1150 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1151 usb->speed = USB_SPEED_HIGH;
1152 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1153 usb->speed = USB_SPEED_LOW;
1155 usb->speed = USB_SPEED_FULL;
1157 dev->children[port] = usb;
1159 /* Run it through the hoops (find a driver, etc) */
1160 if (usb_new_device(usb)) {
1161 /* Woops, disable the port */
1162 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1163 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1168 int usb_hub_configure(struct usb_device *dev)
1170 unsigned char buffer[USB_BUFSIZ], *bitmap;
1171 struct usb_hub_descriptor *descriptor;
1172 struct usb_hub_status *hubsts;
1174 struct usb_hub_device *hub;
1176 /* "allocate" Hub device */
1177 hub = usb_hub_allocate();
1180 hub->pusb_dev = dev;
1181 /* Get the the hub descriptor */
1182 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1183 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1184 "descriptor, giving up %lX\n", dev->status);
1187 descriptor = (struct usb_hub_descriptor *)buffer;
1189 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1190 i = descriptor->bLength;
1191 if (i > USB_BUFSIZ) {
1192 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1193 "descriptor - too long: %d\n",
1194 descriptor->bLength);
1198 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1199 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1200 "descriptor 2nd giving up %lX\n", dev->status);
1203 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1204 /* adjust 16bit values */
1205 hub->desc.wHubCharacteristics =
1206 le16_to_cpu(descriptor->wHubCharacteristics);
1207 /* set the bitmap */
1208 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1209 /* devices not removable by default */
1210 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1211 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1212 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1214 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1215 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1217 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1218 hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
1220 dev->maxchild = descriptor->bNbrPorts;
1221 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1223 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1225 USB_HUB_PRINTF("ganged power switching\n");
1228 USB_HUB_PRINTF("individual port power switching\n");
1232 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1236 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1237 USB_HUB_PRINTF("part of a compound device\n");
1239 USB_HUB_PRINTF("standalone hub\n");
1241 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1243 USB_HUB_PRINTF("global over-current protection\n");
1246 USB_HUB_PRINTF("individual port over-current protection\n");
1250 USB_HUB_PRINTF("no over-current protection\n");
1254 USB_HUB_PRINTF("power on to power good time: %dms\n",
1255 descriptor->bPwrOn2PwrGood * 2);
1256 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1257 descriptor->bHubContrCurrent);
1259 for (i = 0; i < dev->maxchild; i++)
1260 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1261 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1262 (1 << ((i + 1) % 8)) ? " not" : "");
1264 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1265 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1266 "too long: %d\n", descriptor->bLength);
1270 if (usb_get_hub_status(dev, buffer) < 0) {
1271 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1276 hubsts = (struct usb_hub_status *)buffer;
1277 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1278 le16_to_cpu(hubsts->wHubStatus),
1279 le16_to_cpu(hubsts->wHubChange));
1280 USB_HUB_PRINTF("local power source is %s\n",
1281 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1282 "lost (inactive)" : "good");
1283 USB_HUB_PRINTF("%sover-current condition exists\n",
1284 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1286 usb_hub_power_on(hub);
1288 for (i = 0; i < dev->maxchild; i++) {
1289 struct usb_port_status portsts;
1290 unsigned short portstatus, portchange;
1292 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1293 USB_HUB_PRINTF("get_port_status failed\n");
1297 portstatus = le16_to_cpu(portsts.wPortStatus);
1298 portchange = le16_to_cpu(portsts.wPortChange);
1299 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1300 i + 1, portstatus, portchange);
1302 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1303 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1304 usb_hub_port_connect_change(dev, i);
1306 if (portchange & USB_PORT_STAT_C_ENABLE) {
1307 USB_HUB_PRINTF("port %d enable change, status %x\n",
1309 usb_clear_port_feature(dev, i + 1,
1310 USB_PORT_FEAT_C_ENABLE);
1312 /* EM interference sometimes causes bad shielded USB
1313 * devices to be shutdown by the hub, this hack enables
1314 * them again. Works at least with mouse driver */
1315 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1316 (portstatus & USB_PORT_STAT_CONNECTION) &&
1317 ((dev->children[i]))) {
1318 USB_HUB_PRINTF("already running port %i " \
1319 "disabled by hub (EMI?), " \
1320 "re-enabling...\n", i + 1);
1321 usb_hub_port_connect_change(dev, i);
1324 if (portstatus & USB_PORT_STAT_SUSPEND) {
1325 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1326 usb_clear_port_feature(dev, i + 1,
1327 USB_PORT_FEAT_SUSPEND);
1330 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1331 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1332 usb_clear_port_feature(dev, i + 1,
1333 USB_PORT_FEAT_C_OVER_CURRENT);
1334 usb_hub_power_on(hub);
1337 if (portchange & USB_PORT_STAT_C_RESET) {
1338 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1339 usb_clear_port_feature(dev, i + 1,
1340 USB_PORT_FEAT_C_RESET);
1342 } /* end for i all ports */
1347 int usb_hub_probe(struct usb_device *dev, int ifnum)
1349 struct usb_interface *iface;
1350 struct usb_endpoint_descriptor *ep;
1353 iface = &dev->config.if_desc[ifnum];
1355 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1357 /* Some hubs have a subclass of 1, which AFAICT according to the */
1358 /* specs is not defined, but it works */
1359 if ((iface->desc.bInterfaceSubClass != 0) &&
1360 (iface->desc.bInterfaceSubClass != 1))
1362 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1363 if (iface->desc.bNumEndpoints != 1)
1365 ep = &iface->ep_desc[0];
1366 /* Output endpoint? Curiousier and curiousier.. */
1367 if (!(ep->bEndpointAddress & USB_DIR_IN))
1369 /* If it's not an interrupt endpoint, we'd better punt! */
1370 if ((ep->bmAttributes & 3) != 3)
1372 /* We found a hub */
1373 USB_HUB_PRINTF("USB hub found\n");
1374 ret = usb_hub_configure(dev);