3 * Most of this source has been derived from the Linux USB
5 * (C) Copyright Linus Torvalds 1999
6 * (C) Copyright Johannes Erdfelt 1999-2001
7 * (C) Copyright Andreas Gal 1999
8 * (C) Copyright Gregory P. Smith 1999
9 * (C) Copyright Deti Fliegl 1999 (new USB architecture)
10 * (C) Copyright Randy Dunlap 2000
11 * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
12 * (C) Copyright Yggdrasil Computing, Inc. 2000
13 * (usb_device_id matching changes by Adam J. Richter)
16 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
18 * See file CREDITS for list of people who contributed to this
21 * This program is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU General Public License as
23 * published by the Free Software Foundation; either version 2 of
24 * the License, or (at your option) any later version.
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
31 * You should have received a copy of the GNU General Public License
32 * along with this program; if not, write to the Free Software
33 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
41 * Since this is a bootloader, the devices will not be automatic
42 * (re)configured on hotplug, but after a restart of the USB the
45 * For each transfer (except "Interrupt") we wait for completion.
49 #include <asm/processor.h>
50 #include <linux/ctype.h>
51 #include <asm/byteorder.h>
55 #include <asm/4xx_pci.h>
64 #define USB_PRINTF(fmt, args...) printf(fmt , ##args)
66 #define USB_PRINTF(fmt, args...)
69 #define USB_BUFSIZ 512
71 static struct usb_device usb_dev[USB_MAX_DEVICE];
74 static int asynch_allowed;
75 static struct devrequest setup_packet;
77 char usb_started; /* flag for the started/stopped USB status */
79 /**********************************************************************
80 * some forward declerations...
82 void usb_scan_devices(void);
84 int usb_hub_probe(struct usb_device *dev, int ifnum);
85 void usb_hub_reset(void);
86 static int hub_port_reset(struct usb_device *dev, int port,
87 unsigned short *portstat);
89 /***********************************************************************
93 inline void wait_ms(unsigned long ms)
99 /***************************************************************************
111 /* init low_level USB */
113 result = usb_lowlevel_init();
114 /* if lowlevel init is OK, scan the bus for devices
115 * i.e. search HUBs and configure them */
117 printf("scanning bus for devices... ");
123 printf("Error, couldn't init Lowlevel part\n");
129 /******************************************************************************
130 * Stop USB this stops the LowLevel Part and deregisters USB devices.
140 res = usb_lowlevel_stop();
146 * disables the asynch behaviour of the control message. This is used for data
147 * transfers that uses the exclusiv access to the control and bulk messages.
148 * Returns the old value so it can be restored later.
150 int usb_disable_asynch(int disable)
152 int old_value = asynch_allowed;
154 asynch_allowed = !disable;
159 /*-------------------------------------------------------------------
165 * submits an Interrupt Message
167 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
168 void *buffer, int transfer_len, int interval)
170 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
174 * submits a control message and waits for comletion (at least timeout * 1ms)
175 * If timeout is 0, we don't wait for completion (used as example to set and
176 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
177 * allow control messages with 0 timeout, by previousely resetting the flag
178 * asynch_allowed (usb_disable_asynch(1)).
179 * returns the transfered length if OK or -1 if error. The transfered length
180 * and the current status are stored in the dev->act_len and dev->status.
182 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
183 unsigned char request, unsigned char requesttype,
184 unsigned short value, unsigned short index,
185 void *data, unsigned short size, int timeout)
187 if ((timeout == 0) && (!asynch_allowed)) {
188 /* request for a asynch control pipe is not allowed */
192 /* set setup command */
193 setup_packet.requesttype = requesttype;
194 setup_packet.request = request;
195 setup_packet.value = cpu_to_le16(value);
196 setup_packet.index = cpu_to_le16(index);
197 setup_packet.length = cpu_to_le16(size);
198 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
199 "value 0x%X index 0x%X length 0x%X\n",
200 request, requesttype, value, index, size);
201 dev->status = USB_ST_NOT_PROC; /*not yet processed */
203 submit_control_msg(dev, pipe, data, size, &setup_packet);
208 * Wait for status to update until timeout expires, USB driver
209 * interrupt handler may set the status when the USB operation has
213 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
224 /*-------------------------------------------------------------------
225 * submits bulk message, and waits for completion. returns 0 if Ok or
227 * synchronous behavior
229 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
230 void *data, int len, int *actual_length, int timeout)
234 dev->status = USB_ST_NOT_PROC; /*not yet processed */
235 submit_bulk_msg(dev, pipe, data, len);
237 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
241 *actual_length = dev->act_len;
242 if (dev->status == 0)
249 /*-------------------------------------------------------------------
254 * returns the max packet size, depending on the pipe direction and
255 * the configurations values
257 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
259 /* direction is out -> use emaxpacket out */
260 if ((pipe & USB_DIR_IN) == 0)
261 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
263 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
266 /* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
267 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
268 * when it is inlined in 1 single routine. What happens is that the register r3
269 * is used as loop-count 'i', but gets overwritten later on.
270 * This is clearly a compiler bug, but it is easier to workaround it here than
271 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
272 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
274 static void __attribute__((noinline))
275 usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
279 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
281 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
282 USB_ENDPOINT_XFER_CONTROL) {
283 /* Control => bidirectional */
284 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
285 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
286 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
287 b, dev->epmaxpacketin[b]);
289 if ((ep->bEndpointAddress & 0x80) == 0) {
291 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
292 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
293 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
294 b, dev->epmaxpacketout[b]);
298 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
299 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
300 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
301 b, dev->epmaxpacketin[b]);
308 * set the max packed value of all endpoints in the given configuration
310 int usb_set_maxpacket(struct usb_device *dev)
314 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
315 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
316 usb_set_maxpacket_ep(dev,
317 &dev->config.if_desc[i].ep_desc[ii]);
322 /*******************************************************************************
323 * Parse the config, located in buffer, and fills the dev->config structure.
324 * Note that all little/big endian swapping are done automatically.
326 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
328 struct usb_descriptor_header *head;
329 int index, ifno, epno, curr_if_num;
337 dev->configno = cfgno;
338 head = (struct usb_descriptor_header *) &buffer[0];
339 if (head->bDescriptorType != USB_DT_CONFIG) {
340 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
341 head->bDescriptorType);
344 memcpy(&dev->config, buffer, buffer[0]);
345 le16_to_cpus(&(dev->config.desc.wTotalLength));
346 dev->config.no_of_if = 0;
348 index = dev->config.desc.bLength;
349 /* Ok the first entry must be a configuration entry,
350 * now process the others */
351 head = (struct usb_descriptor_header *) &buffer[index];
352 while (index + 1 < dev->config.desc.wTotalLength) {
353 switch (head->bDescriptorType) {
354 case USB_DT_INTERFACE:
355 if (((struct usb_interface_descriptor *) \
356 &buffer[index])->bInterfaceNumber != curr_if_num) {
357 /* this is a new interface, copy new desc */
358 ifno = dev->config.no_of_if;
359 dev->config.no_of_if++;
360 memcpy(&dev->config.if_desc[ifno],
361 &buffer[index], buffer[index]);
362 dev->config.if_desc[ifno].no_of_ep = 0;
363 dev->config.if_desc[ifno].num_altsetting = 1;
365 dev->config.if_desc[ifno].desc.bInterfaceNumber;
367 /* found alternate setting for the interface */
368 dev->config.if_desc[ifno].num_altsetting++;
371 case USB_DT_ENDPOINT:
372 epno = dev->config.if_desc[ifno].no_of_ep;
373 /* found an endpoint */
374 dev->config.if_desc[ifno].no_of_ep++;
375 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
376 &buffer[index], buffer[index]);
377 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
379 USB_PRINTF("if %d, ep %d\n", ifno, epno);
382 if (head->bLength == 0)
385 USB_PRINTF("unknown Description Type : %x\n",
386 head->bDescriptorType);
389 ch = (unsigned char *)head;
390 for (i = 0; i < head->bLength; i++)
391 USB_PRINTF("%02X ", *ch++);
392 USB_PRINTF("\n\n\n");
396 index += head->bLength;
397 head = (struct usb_descriptor_header *)&buffer[index];
402 /***********************************************************************
404 * endp: endpoint number in bits 0-3;
405 * direction flag in bit 7 (1 = IN, 0 = OUT)
407 int usb_clear_halt(struct usb_device *dev, int pipe)
410 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
412 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
413 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
414 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
416 /* don't clear if failed */
421 * NOTE: we do not get status and verify reset was successful
422 * as some devices are reported to lock up upon this check..
425 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
427 /* toggle is reset on clear */
428 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
433 /**********************************************************************
434 * get_descriptor type
436 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
437 unsigned char index, void *buf, int size)
440 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
441 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
442 (type << 8) + index, 0,
443 buf, size, USB_CNTL_TIMEOUT);
447 /**********************************************************************
448 * gets configuration cfgno and store it in the buffer
450 int usb_get_configuration_no(struct usb_device *dev,
451 unsigned char *buffer, int cfgno)
455 struct usb_configuration_descriptor *config;
457 config = (struct usb_configuration_descriptor *)&buffer[0];
458 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
461 printf("unable to get descriptor, error %lX\n",
464 printf("config descriptor too short " \
465 "(expected %i, got %i)\n", 9, result);
468 tmp = le16_to_cpu(config->wTotalLength);
470 if (tmp > USB_BUFSIZ) {
471 USB_PRINTF("usb_get_configuration_no: failed to get " \
472 "descriptor - too long: %d\n", tmp);
476 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
477 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
482 /********************************************************************
483 * set address of a device to the value in dev->devnum.
484 * This can only be done by addressing the device via the default address (0)
486 int usb_set_address(struct usb_device *dev)
490 USB_PRINTF("set address %d\n", dev->devnum);
491 res = usb_control_msg(dev, usb_snddefctrl(dev),
492 USB_REQ_SET_ADDRESS, 0,
494 NULL, 0, USB_CNTL_TIMEOUT);
498 /********************************************************************
499 * set interface number to interface
501 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
503 struct usb_interface *if_face = NULL;
506 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
507 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
508 if_face = &dev->config.if_desc[i];
513 printf("selecting invalid interface %d", interface);
517 * We should return now for devices with only one alternate setting.
518 * According to 9.4.10 of the Universal Serial Bus Specification
519 * Revision 2.0 such devices can return with a STALL. This results in
520 * some USB sticks timeouting during initialization and then being
521 * unusable in U-Boot.
523 if (if_face->num_altsetting == 1)
526 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
527 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
528 alternate, interface, NULL, 0,
529 USB_CNTL_TIMEOUT * 5);
536 /********************************************************************
537 * set configuration number to configuration
539 int usb_set_configuration(struct usb_device *dev, int configuration)
542 USB_PRINTF("set configuration %d\n", configuration);
543 /* set setup command */
544 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
545 USB_REQ_SET_CONFIGURATION, 0,
547 NULL, 0, USB_CNTL_TIMEOUT);
556 /********************************************************************
557 * set protocol to protocol
559 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
561 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
562 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
563 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
566 /********************************************************************
569 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
571 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
572 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
573 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
576 /********************************************************************
579 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
580 unsigned char id, void *buf, int size)
582 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
584 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
585 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
588 /********************************************************************
589 * get class descriptor
591 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
592 unsigned char type, unsigned char id, void *buf, int size)
594 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
595 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
596 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
599 /********************************************************************
600 * get string index in buffer
602 int usb_get_string(struct usb_device *dev, unsigned short langid,
603 unsigned char index, void *buf, int size)
608 for (i = 0; i < 3; ++i) {
609 /* some devices are flaky */
610 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
611 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
612 (USB_DT_STRING << 8) + index, langid, buf, size,
623 static void usb_try_string_workarounds(unsigned char *buf, int *length)
625 int newlength, oldlength = *length;
627 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
628 if (!isprint(buf[newlength]) || buf[newlength + 1])
638 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
639 unsigned int index, unsigned char *buf)
643 /* Try to read the string descriptor by asking for the maximum
644 * possible number of bytes */
645 rc = usb_get_string(dev, langid, index, buf, 255);
647 /* If that failed try to read the descriptor length, then
648 * ask for just that many bytes */
650 rc = usb_get_string(dev, langid, index, buf, 2);
652 rc = usb_get_string(dev, langid, index, buf, buf[0]);
656 if (!buf[0] && !buf[1])
657 usb_try_string_workarounds(buf, &rc);
659 /* There might be extra junk at the end of the descriptor */
663 rc = rc - (rc & 1); /* force a multiple of two */
673 /********************************************************************
675 * Get string index and translate it to ascii.
676 * returns string length (> 0) or error (< 0)
678 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
680 unsigned char mybuf[USB_BUFSIZ];
685 if (size <= 0 || !buf || !index)
690 /* get langid for strings if it's not yet known */
691 if (!dev->have_langid) {
692 err = usb_string_sub(dev, 0, 0, tbuf);
694 USB_PRINTF("error getting string descriptor 0 " \
695 "(error=%lx)\n", dev->status);
697 } else if (tbuf[0] < 4) {
698 USB_PRINTF("string descriptor 0 too short\n");
701 dev->have_langid = -1;
702 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
703 /* always use the first langid listed */
704 USB_PRINTF("USB device number %d default " \
705 "language ID 0x%x\n",
706 dev->devnum, dev->string_langid);
710 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
714 size--; /* leave room for trailing NULL char in output buffer */
715 for (idx = 0, u = 2; u < err; u += 2) {
718 if (tbuf[u+1]) /* high byte */
719 buf[idx++] = '?'; /* non-ASCII character */
721 buf[idx++] = tbuf[u];
729 /********************************************************************
730 * USB device handling:
731 * the USB device are static allocated [USB_MAX_DEVICE].
735 /* returns a pointer to the device with the index [index].
736 * if the device is not assigned (dev->devnum==-1) returns NULL
738 struct usb_device *usb_get_dev_index(int index)
740 if (usb_dev[index].devnum == -1)
743 return &usb_dev[index];
747 /* returns a pointer of a new device structure or NULL, if
748 * no device struct is available
750 struct usb_device *usb_alloc_new_device(void)
753 USB_PRINTF("New Device %d\n", dev_index);
754 if (dev_index == USB_MAX_DEVICE) {
755 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
758 /* default Address is 0, real addresses start with 1 */
759 usb_dev[dev_index].devnum = dev_index + 1;
760 usb_dev[dev_index].maxchild = 0;
761 for (i = 0; i < USB_MAXCHILDREN; i++)
762 usb_dev[dev_index].children[i] = NULL;
763 usb_dev[dev_index].parent = NULL;
765 return &usb_dev[dev_index - 1];
770 * By the time we get here, the device has gotten a new device ID
771 * and is in the default state. We need to identify the thing and
772 * get the ball rolling..
774 * Returns 0 for success, != 0 for error.
776 int usb_new_device(struct usb_device *dev)
780 unsigned char tmpbuf[USB_BUFSIZ];
782 /* We still haven't set the Address yet */
786 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
787 /* this is the old and known way of initializing devices, it is
788 * different than what Windows and Linux are doing. Windows and Linux
789 * both retrieve 64 bytes while reading the device descriptor
790 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
791 * invalid header while reading 8 bytes as device descriptor. */
792 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
793 dev->maxpacketsize = PACKET_SIZE_8;
794 dev->epmaxpacketin[0] = 8;
795 dev->epmaxpacketout[0] = 8;
797 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
799 printf("\n USB device not responding, " \
800 "giving up (status=%lX)\n", dev->status);
804 /* This is a Windows scheme of initialization sequence, with double
805 * reset of the device (Linux uses the same sequence)
806 * Some equipment is said to work only with such init sequence; this
807 * patch is based on the work by Alan Stern:
808 * http://sourceforge.net/mailarchive/forum.php?
809 * thread_id=5729457&forum_id=5398
811 struct usb_device_descriptor *desc;
813 struct usb_device *parent = dev->parent;
814 unsigned short portstatus;
816 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
817 * only 18 bytes long, this will terminate with a short packet. But if
818 * the maxpacket size is 8 or 16 the device may be waiting to transmit
819 * some more, or keeps on retransmitting the 8 byte header. */
821 desc = (struct usb_device_descriptor *)tmpbuf;
822 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
823 /* Default to 64 byte max packet size */
824 dev->maxpacketsize = PACKET_SIZE_64;
825 dev->epmaxpacketin[0] = 64;
826 dev->epmaxpacketout[0] = 64;
828 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
830 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
834 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
836 /* find the port number we're at */
840 for (j = 0; j < parent->maxchild; j++) {
841 if (parent->children[j] == dev) {
847 printf("usb_new_device:cannot locate device's port.\n");
851 /* reset the port for the second time */
852 err = hub_port_reset(dev->parent, port, &portstatus);
854 printf("\n Couldn't reset port %i\n", port);
860 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
861 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
862 switch (dev->descriptor.bMaxPacketSize0) {
864 dev->maxpacketsize = PACKET_SIZE_8;
867 dev->maxpacketsize = PACKET_SIZE_16;
870 dev->maxpacketsize = PACKET_SIZE_32;
873 dev->maxpacketsize = PACKET_SIZE_64;
878 err = usb_set_address(dev); /* set address */
881 printf("\n USB device not accepting new address " \
882 "(error=%lX)\n", dev->status);
886 wait_ms(10); /* Let the SET_ADDRESS settle */
888 tmp = sizeof(dev->descriptor);
890 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
891 &dev->descriptor, sizeof(dev->descriptor));
894 printf("unable to get device descriptor (error=%d)\n",
897 printf("USB device descriptor short read " \
898 "(expected %i, got %i)\n", tmp, err);
901 /* correct le values */
902 le16_to_cpus(&dev->descriptor.bcdUSB);
903 le16_to_cpus(&dev->descriptor.idVendor);
904 le16_to_cpus(&dev->descriptor.idProduct);
905 le16_to_cpus(&dev->descriptor.bcdDevice);
906 /* only support for one config for now */
907 usb_get_configuration_no(dev, &tmpbuf[0], 0);
908 usb_parse_config(dev, &tmpbuf[0], 0);
909 usb_set_maxpacket(dev);
910 /* we set the default configuration here */
911 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
912 printf("failed to set default configuration " \
913 "len %d, status %lX\n", dev->act_len, dev->status);
916 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
917 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
918 dev->descriptor.iSerialNumber);
919 memset(dev->mf, 0, sizeof(dev->mf));
920 memset(dev->prod, 0, sizeof(dev->prod));
921 memset(dev->serial, 0, sizeof(dev->serial));
922 if (dev->descriptor.iManufacturer)
923 usb_string(dev, dev->descriptor.iManufacturer,
924 dev->mf, sizeof(dev->mf));
925 if (dev->descriptor.iProduct)
926 usb_string(dev, dev->descriptor.iProduct,
927 dev->prod, sizeof(dev->prod));
928 if (dev->descriptor.iSerialNumber)
929 usb_string(dev, dev->descriptor.iSerialNumber,
930 dev->serial, sizeof(dev->serial));
931 USB_PRINTF("Manufacturer %s\n", dev->mf);
932 USB_PRINTF("Product %s\n", dev->prod);
933 USB_PRINTF("SerialNumber %s\n", dev->serial);
934 /* now prode if the device is a hub */
935 usb_hub_probe(dev, 0);
939 /* build device Tree */
940 void usb_scan_devices(void)
943 struct usb_device *dev;
945 /* first make all devices unknown */
946 for (i = 0; i < USB_MAX_DEVICE; i++) {
947 memset(&usb_dev[i], 0, sizeof(struct usb_device));
948 usb_dev[i].devnum = -1;
951 /* device 0 is always present (root hub, so let it analyze) */
952 dev = usb_alloc_new_device();
953 if (usb_new_device(dev))
954 printf("No USB Device found\n");
956 printf("%d USB Device(s) found\n", dev_index);
957 /* insert "driver" if possible */
958 #ifdef CONFIG_USB_KEYBOARD
960 USB_PRINTF("scan end\n");
965 /****************************************************************************
967 * Probes device for being a hub and configurate it
971 #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
973 #define USB_HUB_PRINTF(fmt, args...)
977 static struct usb_hub_device hub_dev[USB_MAX_HUB];
978 static int usb_hub_index;
981 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
983 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
984 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
985 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
988 int usb_clear_hub_feature(struct usb_device *dev, int feature)
990 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
991 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
992 0, NULL, 0, USB_CNTL_TIMEOUT);
995 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
997 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
998 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
999 port, NULL, 0, USB_CNTL_TIMEOUT);
1002 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
1004 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1005 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
1006 port, NULL, 0, USB_CNTL_TIMEOUT);
1009 int usb_get_hub_status(struct usb_device *dev, void *data)
1011 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1012 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1013 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1016 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1018 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1019 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1020 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1024 static void usb_hub_power_on(struct usb_hub_device *hub)
1027 struct usb_device *dev;
1029 dev = hub->pusb_dev;
1030 /* Enable power to the ports */
1031 USB_HUB_PRINTF("enabling power on all ports\n");
1032 for (i = 0; i < dev->maxchild; i++) {
1033 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1034 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1035 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1039 void usb_hub_reset(void)
1044 struct usb_hub_device *usb_hub_allocate(void)
1046 if (usb_hub_index < USB_MAX_HUB)
1047 return &hub_dev[usb_hub_index++];
1049 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1055 static inline char *portspeed(int portstatus)
1057 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1059 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1065 static int hub_port_reset(struct usb_device *dev, int port,
1066 unsigned short *portstat)
1069 struct usb_port_status portsts;
1070 unsigned short portstatus, portchange;
1072 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1073 for (tries = 0; tries < MAX_TRIES; tries++) {
1075 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1078 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1079 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1083 portstatus = le16_to_cpu(portsts.wPortStatus);
1084 portchange = le16_to_cpu(portsts.wPortChange);
1086 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1087 portstatus, portchange,
1088 portspeed(portstatus));
1090 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1091 " USB_PORT_STAT_ENABLE %d\n",
1092 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1093 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1094 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1096 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1097 !(portstatus & USB_PORT_STAT_CONNECTION))
1100 if (portstatus & USB_PORT_STAT_ENABLE)
1106 if (tries == MAX_TRIES) {
1107 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1108 "disabling port.\n", port + 1, MAX_TRIES);
1109 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1113 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1114 *portstat = portstatus;
1119 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1121 struct usb_device *usb;
1122 struct usb_port_status portsts;
1123 unsigned short portstatus, portchange;
1126 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1127 USB_HUB_PRINTF("get_port_status failed\n");
1131 portstatus = le16_to_cpu(portsts.wPortStatus);
1132 portchange = le16_to_cpu(portsts.wPortChange);
1133 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1134 portstatus, portchange, portspeed(portstatus));
1136 /* Clear the connection change status */
1137 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1139 /* Disconnect any existing devices under this port */
1140 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1141 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1142 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1143 /* Return now if nothing is connected */
1144 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1149 /* Reset the port */
1150 if (hub_port_reset(dev, port, &portstatus) < 0) {
1151 printf("cannot reset port %i!?\n", port + 1);
1157 /* Allocate a new device struct for it */
1158 usb = usb_alloc_new_device();
1160 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1161 usb->speed = USB_SPEED_HIGH;
1162 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1163 usb->speed = USB_SPEED_LOW;
1165 usb->speed = USB_SPEED_FULL;
1167 dev->children[port] = usb;
1169 /* Run it through the hoops (find a driver, etc) */
1170 if (usb_new_device(usb)) {
1171 /* Woops, disable the port */
1172 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1173 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1178 int usb_hub_configure(struct usb_device *dev)
1180 unsigned char buffer[USB_BUFSIZ], *bitmap;
1181 struct usb_hub_descriptor *descriptor;
1182 struct usb_hub_status *hubsts;
1184 struct usb_hub_device *hub;
1186 /* "allocate" Hub device */
1187 hub = usb_hub_allocate();
1190 hub->pusb_dev = dev;
1191 /* Get the the hub descriptor */
1192 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1193 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1194 "descriptor, giving up %lX\n", dev->status);
1197 descriptor = (struct usb_hub_descriptor *)buffer;
1199 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1200 i = descriptor->bLength;
1201 if (i > USB_BUFSIZ) {
1202 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1203 "descriptor - too long: %d\n",
1204 descriptor->bLength);
1208 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1209 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1210 "descriptor 2nd giving up %lX\n", dev->status);
1213 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1214 /* adjust 16bit values */
1215 hub->desc.wHubCharacteristics =
1216 le16_to_cpu(descriptor->wHubCharacteristics);
1217 /* set the bitmap */
1218 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1219 /* devices not removable by default */
1220 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1221 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1222 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1224 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1225 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1227 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1228 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
1230 dev->maxchild = descriptor->bNbrPorts;
1231 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1233 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1235 USB_HUB_PRINTF("ganged power switching\n");
1238 USB_HUB_PRINTF("individual port power switching\n");
1242 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1246 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1247 USB_HUB_PRINTF("part of a compound device\n");
1249 USB_HUB_PRINTF("standalone hub\n");
1251 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1253 USB_HUB_PRINTF("global over-current protection\n");
1256 USB_HUB_PRINTF("individual port over-current protection\n");
1260 USB_HUB_PRINTF("no over-current protection\n");
1264 USB_HUB_PRINTF("power on to power good time: %dms\n",
1265 descriptor->bPwrOn2PwrGood * 2);
1266 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1267 descriptor->bHubContrCurrent);
1269 for (i = 0; i < dev->maxchild; i++)
1270 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1271 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1272 (1 << ((i + 1) % 8)) ? " not" : "");
1274 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1275 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1276 "too long: %d\n", descriptor->bLength);
1280 if (usb_get_hub_status(dev, buffer) < 0) {
1281 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1286 hubsts = (struct usb_hub_status *)buffer;
1287 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1288 le16_to_cpu(hubsts->wHubStatus),
1289 le16_to_cpu(hubsts->wHubChange));
1290 USB_HUB_PRINTF("local power source is %s\n",
1291 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1292 "lost (inactive)" : "good");
1293 USB_HUB_PRINTF("%sover-current condition exists\n",
1294 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1296 usb_hub_power_on(hub);
1298 for (i = 0; i < dev->maxchild; i++) {
1299 struct usb_port_status portsts;
1300 unsigned short portstatus, portchange;
1302 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1303 USB_HUB_PRINTF("get_port_status failed\n");
1307 portstatus = le16_to_cpu(portsts.wPortStatus);
1308 portchange = le16_to_cpu(portsts.wPortChange);
1309 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1310 i + 1, portstatus, portchange);
1312 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1313 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1314 usb_hub_port_connect_change(dev, i);
1316 if (portchange & USB_PORT_STAT_C_ENABLE) {
1317 USB_HUB_PRINTF("port %d enable change, status %x\n",
1319 usb_clear_port_feature(dev, i + 1,
1320 USB_PORT_FEAT_C_ENABLE);
1322 /* EM interference sometimes causes bad shielded USB
1323 * devices to be shutdown by the hub, this hack enables
1324 * them again. Works at least with mouse driver */
1325 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1326 (portstatus & USB_PORT_STAT_CONNECTION) &&
1327 ((dev->children[i]))) {
1328 USB_HUB_PRINTF("already running port %i " \
1329 "disabled by hub (EMI?), " \
1330 "re-enabling...\n", i + 1);
1331 usb_hub_port_connect_change(dev, i);
1334 if (portstatus & USB_PORT_STAT_SUSPEND) {
1335 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1336 usb_clear_port_feature(dev, i + 1,
1337 USB_PORT_FEAT_SUSPEND);
1340 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1341 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1342 usb_clear_port_feature(dev, i + 1,
1343 USB_PORT_FEAT_C_OVER_CURRENT);
1344 usb_hub_power_on(hub);
1347 if (portchange & USB_PORT_STAT_C_RESET) {
1348 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1349 usb_clear_port_feature(dev, i + 1,
1350 USB_PORT_FEAT_C_RESET);
1352 } /* end for i all ports */
1357 int usb_hub_probe(struct usb_device *dev, int ifnum)
1359 struct usb_interface *iface;
1360 struct usb_endpoint_descriptor *ep;
1363 iface = &dev->config.if_desc[ifnum];
1365 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1367 /* Some hubs have a subclass of 1, which AFAICT according to the */
1368 /* specs is not defined, but it works */
1369 if ((iface->desc.bInterfaceSubClass != 0) &&
1370 (iface->desc.bInterfaceSubClass != 1))
1372 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1373 if (iface->desc.bNumEndpoints != 1)
1375 ep = &iface->ep_desc[0];
1376 /* Output endpoint? Curiousier and curiousier.. */
1377 if (!(ep->bEndpointAddress & USB_DIR_IN))
1379 /* If it's not an interrupt endpoint, we'd better punt! */
1380 if ((ep->bmAttributes & 3) != 3)
1382 /* We found a hub */
1383 USB_HUB_PRINTF("USB hub found\n");
1384 ret = usb_hub_configure(dev);