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);
85 /***********************************************************************
89 void __inline__ wait_ms(unsigned long ms)
94 /***************************************************************************
106 /* init low_level USB */
108 result = usb_lowlevel_init();
109 /* if lowlevel init is OK, scan the bus for devices
110 * i.e. search HUBs and configure them */
112 printf("scanning bus for devices... ");
118 printf("Error, couldn't init Lowlevel part\n");
124 /******************************************************************************
125 * Stop USB this stops the LowLevel Part and deregisters USB devices.
135 res = usb_lowlevel_stop();
141 * disables the asynch behaviour of the control message. This is used for data
142 * transfers that uses the exclusiv access to the control and bulk messages.
144 void usb_disable_asynch(int disable)
146 asynch_allowed = !disable;
150 /*-------------------------------------------------------------------
156 * submits an Interrupt Message
158 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
159 void *buffer, int transfer_len, int interval)
161 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
165 * submits a control message and waits for comletion (at least timeout * 1ms)
166 * If timeout is 0, we don't wait for completion (used as example to set and
167 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
168 * allow control messages with 0 timeout, by previousely resetting the flag
169 * asynch_allowed (usb_disable_asynch(1)).
170 * returns the transfered length if OK or -1 if error. The transfered length
171 * and the current status are stored in the dev->act_len and dev->status.
173 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
174 unsigned char request, unsigned char requesttype,
175 unsigned short value, unsigned short index,
176 void *data, unsigned short size, int timeout)
178 if ((timeout == 0) && (!asynch_allowed)) {
179 /* request for a asynch control pipe is not allowed */
183 /* set setup command */
184 setup_packet.requesttype = requesttype;
185 setup_packet.request = request;
186 setup_packet.value = cpu_to_le16(value);
187 setup_packet.index = cpu_to_le16(index);
188 setup_packet.length = cpu_to_le16(size);
189 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
190 "value 0x%X index 0x%X length 0x%X\n",
191 request, requesttype, value, index, size);
192 dev->status = USB_ST_NOT_PROC; /*not yet processed */
194 submit_control_msg(dev, pipe, data, size, &setup_packet);
199 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
203 if (dev->status == 0)
209 /*-------------------------------------------------------------------
210 * submits bulk message, and waits for completion. returns 0 if Ok or
212 * synchronous behavior
214 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
215 void *data, int len, int *actual_length, int timeout)
219 dev->status = USB_ST_NOT_PROC; /*not yet processed */
220 submit_bulk_msg(dev, pipe, data, len);
222 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
226 *actual_length = dev->act_len;
227 if (dev->status == 0)
234 /*-------------------------------------------------------------------
239 * returns the max packet size, depending on the pipe direction and
240 * the configurations values
242 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
244 /* direction is out -> use emaxpacket out */
245 if ((pipe & USB_DIR_IN) == 0)
246 return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
248 return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
251 /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
252 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
253 * when it is inlined in 1 single routine. What happens is that the register r3
254 * is used as loop-count 'i', but gets overwritten later on.
255 * This is clearly a compiler bug, but it is easier to workaround it here than
256 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
257 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
259 static void __attribute__((noinline))
260 usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
264 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
266 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
267 USB_ENDPOINT_XFER_CONTROL) {
268 /* Control => bidirectional */
269 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
270 dev->epmaxpacketin [b] = ep->wMaxPacketSize;
271 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
272 b, dev->epmaxpacketin[b]);
274 if ((ep->bEndpointAddress & 0x80) == 0) {
276 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
277 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
278 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
279 b, dev->epmaxpacketout[b]);
283 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
284 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
285 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
286 b, dev->epmaxpacketin[b]);
293 * set the max packed value of all endpoints in the given configuration
295 int usb_set_maxpacket(struct usb_device *dev)
299 for (i = 0; i < dev->config.bNumInterfaces; i++)
300 for (ii = 0; ii < dev->config.if_desc[i].bNumEndpoints; ii++)
301 usb_set_maxpacket_ep(dev,
302 &dev->config.if_desc[i].ep_desc[ii]);
307 /*******************************************************************************
308 * Parse the config, located in buffer, and fills the dev->config structure.
309 * Note that all little/big endian swapping are done automatically.
311 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
313 struct usb_descriptor_header *head;
314 int index, ifno, epno, curr_if_num;
322 dev->configno = cfgno;
323 head = (struct usb_descriptor_header *) &buffer[0];
324 if (head->bDescriptorType != USB_DT_CONFIG) {
325 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
326 head->bDescriptorType);
329 memcpy(&dev->config, buffer, buffer[0]);
330 le16_to_cpus(&(dev->config.wTotalLength));
331 dev->config.no_of_if = 0;
333 index = dev->config.bLength;
334 /* Ok the first entry must be a configuration entry,
335 * now process the others */
336 head = (struct usb_descriptor_header *) &buffer[index];
337 while (index + 1 < dev->config.wTotalLength) {
338 switch (head->bDescriptorType) {
339 case USB_DT_INTERFACE:
340 if (((struct usb_interface_descriptor *) \
341 &buffer[index])->bInterfaceNumber != curr_if_num) {
342 /* this is a new interface, copy new desc */
343 ifno = dev->config.no_of_if;
344 dev->config.no_of_if++;
345 memcpy(&dev->config.if_desc[ifno],
346 &buffer[index], buffer[index]);
347 dev->config.if_desc[ifno].no_of_ep = 0;
348 dev->config.if_desc[ifno].num_altsetting = 1;
350 dev->config.if_desc[ifno].bInterfaceNumber;
352 /* found alternate setting for the interface */
353 dev->config.if_desc[ifno].num_altsetting++;
356 case USB_DT_ENDPOINT:
357 epno = dev->config.if_desc[ifno].no_of_ep;
358 /* found an endpoint */
359 dev->config.if_desc[ifno].no_of_ep++;
360 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
361 &buffer[index], buffer[index]);
362 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
364 USB_PRINTF("if %d, ep %d\n", ifno, epno);
367 if (head->bLength == 0)
370 USB_PRINTF("unknown Description Type : %x\n",
371 head->bDescriptorType);
374 ch = (unsigned char *)head;
375 for (i = 0; i < head->bLength; i++)
376 USB_PRINTF("%02X ", *ch++);
377 USB_PRINTF("\n\n\n");
381 index += head->bLength;
382 head = (struct usb_descriptor_header *)&buffer[index];
387 /***********************************************************************
389 * endp: endpoint number in bits 0-3;
390 * direction flag in bit 7 (1 = IN, 0 = OUT)
392 int usb_clear_halt(struct usb_device *dev, int pipe)
395 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
397 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
398 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
399 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
401 /* don't clear if failed */
406 * NOTE: we do not get status and verify reset was successful
407 * as some devices are reported to lock up upon this check..
410 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
412 /* toggle is reset on clear */
413 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
418 /**********************************************************************
419 * get_descriptor type
421 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
422 unsigned char index, void *buf, int size)
425 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
426 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
427 (type << 8) + index, 0,
428 buf, size, USB_CNTL_TIMEOUT);
432 /**********************************************************************
433 * gets configuration cfgno and store it in the buffer
435 int usb_get_configuration_no(struct usb_device *dev,
436 unsigned char *buffer, int cfgno)
440 struct usb_config_descriptor *config;
443 config = (struct usb_config_descriptor *)&buffer[0];
444 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
447 printf("unable to get descriptor, error %lX\n",
450 printf("config descriptor too short " \
451 "(expected %i, got %i)\n", 8, result);
454 tmp = le16_to_cpu(config->wTotalLength);
456 if (tmp > USB_BUFSIZ) {
457 USB_PRINTF("usb_get_configuration_no: failed to get " \
458 "descriptor - too long: %d\n", tmp);
462 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
463 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
468 /********************************************************************
469 * set address of a device to the value in dev->devnum.
470 * This can only be done by addressing the device via the default address (0)
472 int usb_set_address(struct usb_device *dev)
476 USB_PRINTF("set address %d\n", dev->devnum);
477 res = usb_control_msg(dev, usb_snddefctrl(dev),
478 USB_REQ_SET_ADDRESS, 0,
480 NULL, 0, USB_CNTL_TIMEOUT);
484 /********************************************************************
485 * set interface number to interface
487 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
489 struct usb_interface_descriptor *if_face = NULL;
492 for (i = 0; i < dev->config.bNumInterfaces; i++) {
493 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
494 if_face = &dev->config.if_desc[i];
499 printf("selecting invalid interface %d", interface);
503 * We should return now for devices with only one alternate setting.
504 * According to 9.4.10 of the Universal Serial Bus Specification
505 * Revision 2.0 such devices can return with a STALL. This results in
506 * some USB sticks timeouting during initialization and then being
507 * unusable in U-Boot.
509 if (if_face->num_altsetting == 1)
512 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
513 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
514 alternate, interface, NULL, 0,
515 USB_CNTL_TIMEOUT * 5);
522 /********************************************************************
523 * set configuration number to configuration
525 int usb_set_configuration(struct usb_device *dev, int configuration)
528 USB_PRINTF("set configuration %d\n", configuration);
529 /* set setup command */
530 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
531 USB_REQ_SET_CONFIGURATION, 0,
533 NULL, 0, USB_CNTL_TIMEOUT);
542 /********************************************************************
543 * set protocol to protocol
545 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
547 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
548 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
549 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
552 /********************************************************************
555 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
557 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
558 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
559 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
562 /********************************************************************
565 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
566 unsigned char id, void *buf, int size)
568 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
570 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
571 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
574 /********************************************************************
575 * get class descriptor
577 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
578 unsigned char type, unsigned char id, void *buf, int size)
580 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
581 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
582 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
585 /********************************************************************
586 * get string index in buffer
588 int usb_get_string(struct usb_device *dev, unsigned short langid,
589 unsigned char index, void *buf, int size)
594 for (i = 0; i < 3; ++i) {
595 /* some devices are flaky */
596 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
597 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
598 (USB_DT_STRING << 8) + index, langid, buf, size,
609 static void usb_try_string_workarounds(unsigned char *buf, int *length)
611 int newlength, oldlength = *length;
613 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
614 if (!isprint(buf[newlength]) || buf[newlength + 1])
624 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
625 unsigned int index, unsigned char *buf)
629 /* Try to read the string descriptor by asking for the maximum
630 * possible number of bytes */
631 rc = usb_get_string(dev, langid, index, buf, 255);
633 /* If that failed try to read the descriptor length, then
634 * ask for just that many bytes */
636 rc = usb_get_string(dev, langid, index, buf, 2);
638 rc = usb_get_string(dev, langid, index, buf, buf[0]);
642 if (!buf[0] && !buf[1])
643 usb_try_string_workarounds(buf, &rc);
645 /* There might be extra junk at the end of the descriptor */
649 rc = rc - (rc & 1); /* force a multiple of two */
659 /********************************************************************
661 * Get string index and translate it to ascii.
662 * returns string length (> 0) or error (< 0)
664 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
666 unsigned char mybuf[USB_BUFSIZ];
671 if (size <= 0 || !buf || !index)
676 /* get langid for strings if it's not yet known */
677 if (!dev->have_langid) {
678 err = usb_string_sub(dev, 0, 0, tbuf);
680 USB_PRINTF("error getting string descriptor 0 " \
681 "(error=%x)\n", dev->status);
683 } else if (tbuf[0] < 4) {
684 USB_PRINTF("string descriptor 0 too short\n");
687 dev->have_langid = -1;
688 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
689 /* always use the first langid listed */
690 USB_PRINTF("USB device number %d default " \
691 "language ID 0x%x\n",
692 dev->devnum, dev->string_langid);
696 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
700 size--; /* leave room for trailing NULL char in output buffer */
701 for (idx = 0, u = 2; u < err; u += 2) {
704 if (tbuf[u+1]) /* high byte */
705 buf[idx++] = '?'; /* non-ASCII character */
707 buf[idx++] = tbuf[u];
715 /********************************************************************
716 * USB device handling:
717 * the USB device are static allocated [USB_MAX_DEVICE].
721 /* returns a pointer to the device with the index [index].
722 * if the device is not assigned (dev->devnum==-1) returns NULL
724 struct usb_device *usb_get_dev_index(int index)
726 if (usb_dev[index].devnum == -1)
729 return &usb_dev[index];
733 /* returns a pointer of a new device structure or NULL, if
734 * no device struct is available
736 struct usb_device *usb_alloc_new_device(void)
739 USB_PRINTF("New Device %d\n", dev_index);
740 if (dev_index == USB_MAX_DEVICE) {
741 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
744 /* default Address is 0, real addresses start with 1 */
745 usb_dev[dev_index].devnum = dev_index + 1;
746 usb_dev[dev_index].maxchild = 0;
747 for (i = 0; i < USB_MAXCHILDREN; i++)
748 usb_dev[dev_index].children[i] = NULL;
749 usb_dev[dev_index].parent = NULL;
751 return &usb_dev[dev_index - 1];
756 * By the time we get here, the device has gotten a new device ID
757 * and is in the default state. We need to identify the thing and
758 * get the ball rolling..
760 * Returns 0 for success, != 0 for error.
762 int usb_new_device(struct usb_device *dev)
766 unsigned char tmpbuf[USB_BUFSIZ];
768 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
769 dev->maxpacketsize = 0; /* Default to 8 byte max packet size */
770 dev->epmaxpacketin [0] = 8;
771 dev->epmaxpacketout[0] = 8;
773 /* We still haven't set the Address yet */
779 /* this is a Windows scheme of initialization sequence, with double
780 * reset of the device. Some equipment is said to work only with such
781 * init sequence; this patch is based on the work by Alan Stern:
782 * http://sourceforge.net/mailarchive/forum.php?thread_id=5729457&forum_id=5398
785 struct usb_device_descriptor *desc;
787 struct usb_device *parent = dev->parent;
788 unsigned short portstatus;
790 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
791 * only 18 bytes long, this will terminate with a short packet. But if
792 * the maxpacket size is 8 or 16 the device may be waiting to transmit
795 desc = (struct usb_device_descriptor *)tmpbuf;
796 desc->bMaxPacketSize0 = 0;
797 for (j = 0; j < 3; ++j) {
798 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
800 USB_PRINTF("usb_new_device: 64 byte descr\n");
804 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
806 /* find the port number we're at */
809 for (j = 0; j < parent->maxchild; j++) {
810 if (parent->children[j] == dev) {
816 printf("usb_new_device:cannot locate device's port.\n");
820 /* reset the port for the second time */
821 err = hub_port_reset(dev->parent, port, &portstatus);
823 printf("\n Couldn't reset port %i\n", port);
828 /* and this is the old and known way of initializing devices */
829 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
831 printf("\n USB device not responding, " \
832 "giving up (status=%lX)\n", dev->status);
837 dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
838 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
839 switch (dev->descriptor.bMaxPacketSize0) {
840 case 8: dev->maxpacketsize = 0; break;
841 case 16: dev->maxpacketsize = 1; break;
842 case 32: dev->maxpacketsize = 2; break;
843 case 64: dev->maxpacketsize = 3; break;
847 err = usb_set_address(dev); /* set address */
850 printf("\n USB device not accepting new address " \
851 "(error=%lX)\n", dev->status);
855 wait_ms(10); /* Let the SET_ADDRESS settle */
857 tmp = sizeof(dev->descriptor);
859 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
860 &dev->descriptor, sizeof(dev->descriptor));
863 printf("unable to get device descriptor (error=%d)\n",
866 printf("USB device descriptor short read " \
867 "(expected %i, got %i)\n", tmp, err);
870 /* correct le values */
871 le16_to_cpus(&dev->descriptor.bcdUSB);
872 le16_to_cpus(&dev->descriptor.idVendor);
873 le16_to_cpus(&dev->descriptor.idProduct);
874 le16_to_cpus(&dev->descriptor.bcdDevice);
875 /* only support for one config for now */
876 usb_get_configuration_no(dev, &tmpbuf[0], 0);
877 usb_parse_config(dev, &tmpbuf[0], 0);
878 usb_set_maxpacket(dev);
879 /* we set the default configuration here */
880 if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
881 printf("failed to set default configuration " \
882 "len %d, status %lX\n", dev->act_len, dev->status);
885 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
886 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
887 dev->descriptor.iSerialNumber);
888 memset(dev->mf, 0, sizeof(dev->mf));
889 memset(dev->prod, 0, sizeof(dev->prod));
890 memset(dev->serial, 0, sizeof(dev->serial));
891 if (dev->descriptor.iManufacturer)
892 usb_string(dev, dev->descriptor.iManufacturer,
893 dev->mf, sizeof(dev->mf));
894 if (dev->descriptor.iProduct)
895 usb_string(dev, dev->descriptor.iProduct,
896 dev->prod, sizeof(dev->prod));
897 if (dev->descriptor.iSerialNumber)
898 usb_string(dev, dev->descriptor.iSerialNumber,
899 dev->serial, sizeof(dev->serial));
900 USB_PRINTF("Manufacturer %s\n", dev->mf);
901 USB_PRINTF("Product %s\n", dev->prod);
902 USB_PRINTF("SerialNumber %s\n", dev->serial);
903 /* now prode if the device is a hub */
904 usb_hub_probe(dev, 0);
908 /* build device Tree */
909 void usb_scan_devices(void)
912 struct usb_device *dev;
914 /* first make all devices unknown */
915 for (i = 0; i < USB_MAX_DEVICE; i++) {
916 memset(&usb_dev[i], 0, sizeof(struct usb_device));
917 usb_dev[i].devnum = -1;
920 /* device 0 is always present (root hub, so let it analyze) */
921 dev = usb_alloc_new_device();
923 printf("%d USB Device(s) found\n", dev_index);
924 /* insert "driver" if possible */
925 #ifdef CONFIG_USB_KEYBOARD
927 USB_PRINTF("scan end\n");
932 /****************************************************************************
934 * Probes device for being a hub and configurate it
940 #define USB_HUB_PRINTF(fmt, args...) printf (fmt , ##args)
942 #define USB_HUB_PRINTF(fmt, args...)
946 static struct usb_hub_device hub_dev[USB_MAX_HUB];
947 static int usb_hub_index;
950 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
952 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
953 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
954 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
957 int usb_clear_hub_feature(struct usb_device *dev, int feature)
959 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
960 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
961 0, NULL, 0, USB_CNTL_TIMEOUT);
964 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
966 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
967 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
968 port, NULL, 0, USB_CNTL_TIMEOUT);
971 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
973 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
974 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
975 port, NULL, 0, USB_CNTL_TIMEOUT);
978 int usb_get_hub_status(struct usb_device *dev, void *data)
980 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
981 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
982 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
985 int usb_get_port_status(struct usb_device *dev, int port, void *data)
987 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
988 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
989 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
993 static void usb_hub_power_on(struct usb_hub_device *hub)
996 struct usb_device *dev;
999 /* Enable power to the ports */
1000 USB_HUB_PRINTF("enabling power on all ports\n");
1001 for (i = 0; i < dev->maxchild; i++) {
1002 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1003 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1004 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1008 void usb_hub_reset(void)
1013 struct usb_hub_device *usb_hub_allocate(void)
1015 if (usb_hub_index < USB_MAX_HUB)
1016 return &hub_dev[usb_hub_index++];
1018 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1024 static int hub_port_reset(struct usb_device *dev, int port,
1025 unsigned short *portstat)
1028 struct usb_port_status portsts;
1029 unsigned short portstatus, portchange;
1031 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1032 for (tries = 0; tries < MAX_TRIES; tries++) {
1034 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1037 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1038 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1042 portstatus = le16_to_cpu(portsts.wPortStatus);
1043 portchange = le16_to_cpu(portsts.wPortChange);
1044 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1045 portstatus, portchange,
1046 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? \
1047 "Low Speed" : "High Speed");
1048 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1049 " USB_PORT_STAT_ENABLE %d\n",
1050 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1051 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1052 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1054 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1055 !(portstatus & USB_PORT_STAT_CONNECTION))
1058 if (portstatus & USB_PORT_STAT_ENABLE)
1064 if (tries == MAX_TRIES) {
1065 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1066 "disabling port.\n", port + 1, MAX_TRIES);
1067 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1071 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1072 *portstat = portstatus;
1077 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1079 struct usb_device *usb;
1080 struct usb_port_status portsts;
1081 unsigned short portstatus, portchange;
1084 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1085 USB_HUB_PRINTF("get_port_status failed\n");
1089 portstatus = le16_to_cpu(portsts.wPortStatus);
1090 portchange = le16_to_cpu(portsts.wPortChange);
1091 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1092 portstatus, portchange,
1093 portstatus&(1 << USB_PORT_FEAT_LOWSPEED) ? \
1094 "Low Speed" : "High Speed");
1096 /* Clear the connection change status */
1097 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1099 /* Disconnect any existing devices under this port */
1100 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1101 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1102 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1103 /* Return now if nothing is connected */
1104 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1109 /* Reset the port */
1110 if (hub_port_reset(dev, port, &portstatus) < 0) {
1111 printf("cannot reset port %i!?\n", port + 1);
1117 /* Allocate a new device struct for it */
1118 usb = usb_alloc_new_device();
1119 usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
1121 dev->children[port] = usb;
1123 /* Run it through the hoops (find a driver, etc) */
1124 if (usb_new_device(usb)) {
1125 /* Woops, disable the port */
1126 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1127 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1132 int usb_hub_configure(struct usb_device *dev)
1134 unsigned char buffer[USB_BUFSIZ], *bitmap;
1135 struct usb_hub_descriptor *descriptor;
1136 struct usb_hub_status *hubsts;
1138 struct usb_hub_device *hub;
1140 /* "allocate" Hub device */
1141 hub = usb_hub_allocate();
1144 hub->pusb_dev = dev;
1145 /* Get the the hub descriptor */
1146 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1147 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1148 "descriptor, giving up %lX\n", dev->status);
1151 descriptor = (struct usb_hub_descriptor *)buffer;
1153 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1154 i = descriptor->bLength;
1155 if (i > USB_BUFSIZ) {
1156 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1157 "descriptor - too long: %d\n",
1158 descriptor->bLength);
1162 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1163 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1164 "descriptor 2nd giving up %lX\n", dev->status);
1167 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1168 /* adjust 16bit values */
1169 hub->desc.wHubCharacteristics =
1170 le16_to_cpu(descriptor->wHubCharacteristics);
1171 /* set the bitmap */
1172 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1173 /* devices not removable by default */
1174 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1175 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1176 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1178 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1179 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1181 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1182 hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
1184 dev->maxchild = descriptor->bNbrPorts;
1185 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1187 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1189 USB_HUB_PRINTF("ganged power switching\n");
1192 USB_HUB_PRINTF("individual port power switching\n");
1196 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1200 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1201 USB_HUB_PRINTF("part of a compound device\n");
1203 USB_HUB_PRINTF("standalone hub\n");
1205 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1207 USB_HUB_PRINTF("global over-current protection\n");
1210 USB_HUB_PRINTF("individual port over-current protection\n");
1214 USB_HUB_PRINTF("no over-current protection\n");
1218 USB_HUB_PRINTF("power on to power good time: %dms\n",
1219 descriptor->bPwrOn2PwrGood * 2);
1220 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1221 descriptor->bHubContrCurrent);
1223 for (i = 0; i < dev->maxchild; i++)
1224 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1225 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1226 (1 << ((i + 1) % 8)) ? " not" : "");
1228 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1229 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1230 "too long: %d\n", descriptor->bLength);
1234 if (usb_get_hub_status(dev, buffer) < 0) {
1235 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1240 hubsts = (struct usb_hub_status *)buffer;
1241 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1242 le16_to_cpu(hubsts->wHubStatus),
1243 le16_to_cpu(hubsts->wHubChange));
1244 USB_HUB_PRINTF("local power source is %s\n",
1245 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1246 "lost (inactive)" : "good");
1247 USB_HUB_PRINTF("%sover-current condition exists\n",
1248 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1250 usb_hub_power_on(hub);
1252 for (i = 0; i < dev->maxchild; i++) {
1253 struct usb_port_status portsts;
1254 unsigned short portstatus, portchange;
1256 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1257 USB_HUB_PRINTF("get_port_status failed\n");
1261 portstatus = le16_to_cpu(portsts.wPortStatus);
1262 portchange = le16_to_cpu(portsts.wPortChange);
1263 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1264 i + 1, portstatus, portchange);
1266 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1267 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1268 usb_hub_port_connect_change(dev, i);
1270 if (portchange & USB_PORT_STAT_C_ENABLE) {
1271 USB_HUB_PRINTF("port %d enable change, status %x\n",
1273 usb_clear_port_feature(dev, i + 1,
1274 USB_PORT_FEAT_C_ENABLE);
1276 /* EM interference sometimes causes bad shielded USB
1277 * devices to be shutdown by the hub, this hack enables
1278 * them again. Works at least with mouse driver */
1279 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1280 (portstatus & USB_PORT_STAT_CONNECTION) &&
1281 ((dev->children[i]))) {
1282 USB_HUB_PRINTF("already running port %i " \
1283 "disabled by hub (EMI?), " \
1284 "re-enabling...\n", i + 1);
1285 usb_hub_port_connect_change(dev, i);
1288 if (portstatus & USB_PORT_STAT_SUSPEND) {
1289 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1290 usb_clear_port_feature(dev, i + 1,
1291 USB_PORT_FEAT_SUSPEND);
1294 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1295 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1296 usb_clear_port_feature(dev, i + 1,
1297 USB_PORT_FEAT_C_OVER_CURRENT);
1298 usb_hub_power_on(hub);
1301 if (portchange & USB_PORT_STAT_C_RESET) {
1302 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1303 usb_clear_port_feature(dev, i + 1,
1304 USB_PORT_FEAT_C_RESET);
1306 } /* end for i all ports */
1311 int usb_hub_probe(struct usb_device *dev, int ifnum)
1313 struct usb_interface_descriptor *iface;
1314 struct usb_endpoint_descriptor *ep;
1317 iface = &dev->config.if_desc[ifnum];
1319 if (iface->bInterfaceClass != USB_CLASS_HUB)
1321 /* Some hubs have a subclass of 1, which AFAICT according to the */
1322 /* specs is not defined, but it works */
1323 if ((iface->bInterfaceSubClass != 0) &&
1324 (iface->bInterfaceSubClass != 1))
1326 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1327 if (iface->bNumEndpoints != 1)
1329 ep = &iface->ep_desc[0];
1330 /* Output endpoint? Curiousier and curiousier.. */
1331 if (!(ep->bEndpointAddress & USB_DIR_IN))
1333 /* If it's not an interrupt endpoint, we'd better punt! */
1334 if ((ep->bmAttributes & 3) != 3)
1336 /* We found a hub */
1337 USB_HUB_PRINTF("USB hub found\n");
1338 ret = usb_hub_configure(dev);