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;
336 dev->configno = cfgno;
337 head = (struct usb_descriptor_header *) &buffer[0];
338 if (head->bDescriptorType != USB_DT_CONFIG) {
339 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
340 head->bDescriptorType);
343 memcpy(&dev->config, buffer, buffer[0]);
344 le16_to_cpus(&(dev->config.desc.wTotalLength));
345 dev->config.no_of_if = 0;
347 index = dev->config.desc.bLength;
348 /* Ok the first entry must be a configuration entry,
349 * now process the others */
350 head = (struct usb_descriptor_header *) &buffer[index];
351 while (index + 1 < dev->config.desc.wTotalLength) {
352 switch (head->bDescriptorType) {
353 case USB_DT_INTERFACE:
354 if (((struct usb_interface_descriptor *) \
355 &buffer[index])->bInterfaceNumber != curr_if_num) {
356 /* this is a new interface, copy new desc */
357 ifno = dev->config.no_of_if;
358 dev->config.no_of_if++;
359 memcpy(&dev->config.if_desc[ifno],
360 &buffer[index], buffer[index]);
361 dev->config.if_desc[ifno].no_of_ep = 0;
362 dev->config.if_desc[ifno].num_altsetting = 1;
364 dev->config.if_desc[ifno].desc.bInterfaceNumber;
366 /* found alternate setting for the interface */
367 dev->config.if_desc[ifno].num_altsetting++;
370 case USB_DT_ENDPOINT:
371 epno = dev->config.if_desc[ifno].no_of_ep;
372 /* found an endpoint */
373 dev->config.if_desc[ifno].no_of_ep++;
374 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
375 &buffer[index], buffer[index]);
376 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
378 USB_PRINTF("if %d, ep %d\n", ifno, epno);
381 if (head->bLength == 0)
384 USB_PRINTF("unknown Description Type : %x\n",
385 head->bDescriptorType);
389 unsigned char *ch = (unsigned char *)head;
391 for (i = 0; i < head->bLength; i++)
392 USB_PRINTF("%02X ", *ch++);
393 USB_PRINTF("\n\n\n");
397 index += head->bLength;
398 head = (struct usb_descriptor_header *)&buffer[index];
403 /***********************************************************************
405 * endp: endpoint number in bits 0-3;
406 * direction flag in bit 7 (1 = IN, 0 = OUT)
408 int usb_clear_halt(struct usb_device *dev, int pipe)
411 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
413 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
414 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
415 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
417 /* don't clear if failed */
422 * NOTE: we do not get status and verify reset was successful
423 * as some devices are reported to lock up upon this check..
426 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
428 /* toggle is reset on clear */
429 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
434 /**********************************************************************
435 * get_descriptor type
437 int usb_get_descriptor(struct usb_device *dev, unsigned char type,
438 unsigned char index, void *buf, int size)
441 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
442 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
443 (type << 8) + index, 0,
444 buf, size, USB_CNTL_TIMEOUT);
448 /**********************************************************************
449 * gets configuration cfgno and store it in the buffer
451 int usb_get_configuration_no(struct usb_device *dev,
452 unsigned char *buffer, int cfgno)
456 struct usb_configuration_descriptor *config;
458 config = (struct usb_configuration_descriptor *)&buffer[0];
459 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
462 printf("unable to get descriptor, error %lX\n",
465 printf("config descriptor too short " \
466 "(expected %i, got %i)\n", 9, result);
469 tmp = le16_to_cpu(config->wTotalLength);
471 if (tmp > USB_BUFSIZ) {
472 USB_PRINTF("usb_get_configuration_no: failed to get " \
473 "descriptor - too long: %d\n", tmp);
477 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
478 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
483 /********************************************************************
484 * set address of a device to the value in dev->devnum.
485 * This can only be done by addressing the device via the default address (0)
487 int usb_set_address(struct usb_device *dev)
491 USB_PRINTF("set address %d\n", dev->devnum);
492 res = usb_control_msg(dev, usb_snddefctrl(dev),
493 USB_REQ_SET_ADDRESS, 0,
495 NULL, 0, USB_CNTL_TIMEOUT);
499 /********************************************************************
500 * set interface number to interface
502 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
504 struct usb_interface *if_face = NULL;
507 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
508 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
509 if_face = &dev->config.if_desc[i];
514 printf("selecting invalid interface %d", interface);
518 * We should return now for devices with only one alternate setting.
519 * According to 9.4.10 of the Universal Serial Bus Specification
520 * Revision 2.0 such devices can return with a STALL. This results in
521 * some USB sticks timeouting during initialization and then being
522 * unusable in U-Boot.
524 if (if_face->num_altsetting == 1)
527 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
528 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
529 alternate, interface, NULL, 0,
530 USB_CNTL_TIMEOUT * 5);
537 /********************************************************************
538 * set configuration number to configuration
540 int usb_set_configuration(struct usb_device *dev, int configuration)
543 USB_PRINTF("set configuration %d\n", configuration);
544 /* set setup command */
545 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
546 USB_REQ_SET_CONFIGURATION, 0,
548 NULL, 0, USB_CNTL_TIMEOUT);
557 /********************************************************************
558 * set protocol to protocol
560 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
562 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
563 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
564 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
567 /********************************************************************
570 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
572 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
573 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
574 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
577 /********************************************************************
580 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
581 unsigned char id, void *buf, int size)
583 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
585 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
586 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
589 /********************************************************************
590 * get class descriptor
592 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
593 unsigned char type, unsigned char id, void *buf, int size)
595 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
596 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
597 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
600 /********************************************************************
601 * get string index in buffer
603 int usb_get_string(struct usb_device *dev, unsigned short langid,
604 unsigned char index, void *buf, int size)
609 for (i = 0; i < 3; ++i) {
610 /* some devices are flaky */
611 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
612 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
613 (USB_DT_STRING << 8) + index, langid, buf, size,
624 static void usb_try_string_workarounds(unsigned char *buf, int *length)
626 int newlength, oldlength = *length;
628 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
629 if (!isprint(buf[newlength]) || buf[newlength + 1])
639 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
640 unsigned int index, unsigned char *buf)
644 /* Try to read the string descriptor by asking for the maximum
645 * possible number of bytes */
646 rc = usb_get_string(dev, langid, index, buf, 255);
648 /* If that failed try to read the descriptor length, then
649 * ask for just that many bytes */
651 rc = usb_get_string(dev, langid, index, buf, 2);
653 rc = usb_get_string(dev, langid, index, buf, buf[0]);
657 if (!buf[0] && !buf[1])
658 usb_try_string_workarounds(buf, &rc);
660 /* There might be extra junk at the end of the descriptor */
664 rc = rc - (rc & 1); /* force a multiple of two */
674 /********************************************************************
676 * Get string index and translate it to ascii.
677 * returns string length (> 0) or error (< 0)
679 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
681 unsigned char mybuf[USB_BUFSIZ];
686 if (size <= 0 || !buf || !index)
691 /* get langid for strings if it's not yet known */
692 if (!dev->have_langid) {
693 err = usb_string_sub(dev, 0, 0, tbuf);
695 USB_PRINTF("error getting string descriptor 0 " \
696 "(error=%lx)\n", dev->status);
698 } else if (tbuf[0] < 4) {
699 USB_PRINTF("string descriptor 0 too short\n");
702 dev->have_langid = -1;
703 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
704 /* always use the first langid listed */
705 USB_PRINTF("USB device number %d default " \
706 "language ID 0x%x\n",
707 dev->devnum, dev->string_langid);
711 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
715 size--; /* leave room for trailing NULL char in output buffer */
716 for (idx = 0, u = 2; u < err; u += 2) {
719 if (tbuf[u+1]) /* high byte */
720 buf[idx++] = '?'; /* non-ASCII character */
722 buf[idx++] = tbuf[u];
730 /********************************************************************
731 * USB device handling:
732 * the USB device are static allocated [USB_MAX_DEVICE].
736 /* returns a pointer to the device with the index [index].
737 * if the device is not assigned (dev->devnum==-1) returns NULL
739 struct usb_device *usb_get_dev_index(int index)
741 if (usb_dev[index].devnum == -1)
744 return &usb_dev[index];
748 /* returns a pointer of a new device structure or NULL, if
749 * no device struct is available
751 struct usb_device *usb_alloc_new_device(void)
754 USB_PRINTF("New Device %d\n", dev_index);
755 if (dev_index == USB_MAX_DEVICE) {
756 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
759 /* default Address is 0, real addresses start with 1 */
760 usb_dev[dev_index].devnum = dev_index + 1;
761 usb_dev[dev_index].maxchild = 0;
762 for (i = 0; i < USB_MAXCHILDREN; i++)
763 usb_dev[dev_index].children[i] = NULL;
764 usb_dev[dev_index].parent = NULL;
766 return &usb_dev[dev_index - 1];
771 * By the time we get here, the device has gotten a new device ID
772 * and is in the default state. We need to identify the thing and
773 * get the ball rolling..
775 * Returns 0 for success, != 0 for error.
777 int usb_new_device(struct usb_device *dev)
781 unsigned char tmpbuf[USB_BUFSIZ];
783 /* We still haven't set the Address yet */
787 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
788 /* this is the old and known way of initializing devices, it is
789 * different than what Windows and Linux are doing. Windows and Linux
790 * both retrieve 64 bytes while reading the device descriptor
791 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
792 * invalid header while reading 8 bytes as device descriptor. */
793 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
794 dev->maxpacketsize = PACKET_SIZE_8;
795 dev->epmaxpacketin[0] = 8;
796 dev->epmaxpacketout[0] = 8;
798 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
800 printf("\n USB device not responding, " \
801 "giving up (status=%lX)\n", dev->status);
805 /* This is a Windows scheme of initialization sequence, with double
806 * reset of the device (Linux uses the same sequence)
807 * Some equipment is said to work only with such init sequence; this
808 * patch is based on the work by Alan Stern:
809 * http://sourceforge.net/mailarchive/forum.php?
810 * thread_id=5729457&forum_id=5398
812 struct usb_device_descriptor *desc;
814 struct usb_device *parent = dev->parent;
815 unsigned short portstatus;
817 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
818 * only 18 bytes long, this will terminate with a short packet. But if
819 * the maxpacket size is 8 or 16 the device may be waiting to transmit
820 * some more, or keeps on retransmitting the 8 byte header. */
822 desc = (struct usb_device_descriptor *)tmpbuf;
823 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
824 /* Default to 64 byte max packet size */
825 dev->maxpacketsize = PACKET_SIZE_64;
826 dev->epmaxpacketin[0] = 64;
827 dev->epmaxpacketout[0] = 64;
829 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
831 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
835 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
837 /* find the port number we're at */
841 for (j = 0; j < parent->maxchild; j++) {
842 if (parent->children[j] == dev) {
848 printf("usb_new_device:cannot locate device's port.\n");
852 /* reset the port for the second time */
853 err = hub_port_reset(dev->parent, port, &portstatus);
855 printf("\n Couldn't reset port %i\n", port);
861 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
862 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
863 switch (dev->descriptor.bMaxPacketSize0) {
865 dev->maxpacketsize = PACKET_SIZE_8;
868 dev->maxpacketsize = PACKET_SIZE_16;
871 dev->maxpacketsize = PACKET_SIZE_32;
874 dev->maxpacketsize = PACKET_SIZE_64;
879 err = usb_set_address(dev); /* set address */
882 printf("\n USB device not accepting new address " \
883 "(error=%lX)\n", dev->status);
887 wait_ms(10); /* Let the SET_ADDRESS settle */
889 tmp = sizeof(dev->descriptor);
891 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
892 &dev->descriptor, sizeof(dev->descriptor));
895 printf("unable to get device descriptor (error=%d)\n",
898 printf("USB device descriptor short read " \
899 "(expected %i, got %i)\n", tmp, err);
902 /* correct le values */
903 le16_to_cpus(&dev->descriptor.bcdUSB);
904 le16_to_cpus(&dev->descriptor.idVendor);
905 le16_to_cpus(&dev->descriptor.idProduct);
906 le16_to_cpus(&dev->descriptor.bcdDevice);
907 /* only support for one config for now */
908 usb_get_configuration_no(dev, &tmpbuf[0], 0);
909 usb_parse_config(dev, &tmpbuf[0], 0);
910 usb_set_maxpacket(dev);
911 /* we set the default configuration here */
912 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
913 printf("failed to set default configuration " \
914 "len %d, status %lX\n", dev->act_len, dev->status);
917 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
918 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
919 dev->descriptor.iSerialNumber);
920 memset(dev->mf, 0, sizeof(dev->mf));
921 memset(dev->prod, 0, sizeof(dev->prod));
922 memset(dev->serial, 0, sizeof(dev->serial));
923 if (dev->descriptor.iManufacturer)
924 usb_string(dev, dev->descriptor.iManufacturer,
925 dev->mf, sizeof(dev->mf));
926 if (dev->descriptor.iProduct)
927 usb_string(dev, dev->descriptor.iProduct,
928 dev->prod, sizeof(dev->prod));
929 if (dev->descriptor.iSerialNumber)
930 usb_string(dev, dev->descriptor.iSerialNumber,
931 dev->serial, sizeof(dev->serial));
932 USB_PRINTF("Manufacturer %s\n", dev->mf);
933 USB_PRINTF("Product %s\n", dev->prod);
934 USB_PRINTF("SerialNumber %s\n", dev->serial);
935 /* now prode if the device is a hub */
936 usb_hub_probe(dev, 0);
940 /* build device Tree */
941 void usb_scan_devices(void)
944 struct usb_device *dev;
946 /* first make all devices unknown */
947 for (i = 0; i < USB_MAX_DEVICE; i++) {
948 memset(&usb_dev[i], 0, sizeof(struct usb_device));
949 usb_dev[i].devnum = -1;
952 /* device 0 is always present (root hub, so let it analyze) */
953 dev = usb_alloc_new_device();
954 if (usb_new_device(dev))
955 printf("No USB Device found\n");
957 printf("%d USB Device(s) found\n", dev_index);
958 /* insert "driver" if possible */
959 #ifdef CONFIG_USB_KEYBOARD
962 USB_PRINTF("scan end\n");
966 /****************************************************************************
968 * Probes device for being a hub and configurate it
972 #define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
974 #define USB_HUB_PRINTF(fmt, args...)
978 static struct usb_hub_device hub_dev[USB_MAX_HUB];
979 static int usb_hub_index;
982 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
984 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
985 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
986 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
989 int usb_clear_hub_feature(struct usb_device *dev, int feature)
991 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
992 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
993 0, NULL, 0, USB_CNTL_TIMEOUT);
996 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
998 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
999 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
1000 port, NULL, 0, USB_CNTL_TIMEOUT);
1003 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
1005 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1006 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
1007 port, NULL, 0, USB_CNTL_TIMEOUT);
1010 int usb_get_hub_status(struct usb_device *dev, void *data)
1012 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1013 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1014 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1017 int usb_get_port_status(struct usb_device *dev, int port, void *data)
1019 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1020 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1021 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1025 static void usb_hub_power_on(struct usb_hub_device *hub)
1028 struct usb_device *dev;
1030 dev = hub->pusb_dev;
1031 /* Enable power to the ports */
1032 USB_HUB_PRINTF("enabling power on all ports\n");
1033 for (i = 0; i < dev->maxchild; i++) {
1034 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1035 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1036 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1040 void usb_hub_reset(void)
1045 struct usb_hub_device *usb_hub_allocate(void)
1047 if (usb_hub_index < USB_MAX_HUB)
1048 return &hub_dev[usb_hub_index++];
1050 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1056 static inline char *portspeed(int portstatus)
1058 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1060 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1066 static int hub_port_reset(struct usb_device *dev, int port,
1067 unsigned short *portstat)
1070 struct usb_port_status portsts;
1071 unsigned short portstatus, portchange;
1073 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1074 for (tries = 0; tries < MAX_TRIES; tries++) {
1076 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1079 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1080 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1084 portstatus = le16_to_cpu(portsts.wPortStatus);
1085 portchange = le16_to_cpu(portsts.wPortChange);
1087 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1088 portstatus, portchange,
1089 portspeed(portstatus));
1091 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1092 " USB_PORT_STAT_ENABLE %d\n",
1093 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1094 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1095 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1097 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1098 !(portstatus & USB_PORT_STAT_CONNECTION))
1101 if (portstatus & USB_PORT_STAT_ENABLE)
1107 if (tries == MAX_TRIES) {
1108 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1109 "disabling port.\n", port + 1, MAX_TRIES);
1110 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1114 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1115 *portstat = portstatus;
1120 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1122 struct usb_device *usb;
1123 struct usb_port_status portsts;
1124 unsigned short portstatus;
1127 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1128 USB_HUB_PRINTF("get_port_status failed\n");
1132 portstatus = le16_to_cpu(portsts.wPortStatus);
1133 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1135 le16_to_cpu(portsts.wPortChange),
1136 portspeed(portstatus));
1138 /* Clear the connection change status */
1139 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1141 /* Disconnect any existing devices under this port */
1142 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1143 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1144 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1145 /* Return now if nothing is connected */
1146 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1151 /* Reset the port */
1152 if (hub_port_reset(dev, port, &portstatus) < 0) {
1153 printf("cannot reset port %i!?\n", port + 1);
1159 /* Allocate a new device struct for it */
1160 usb = usb_alloc_new_device();
1162 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1163 usb->speed = USB_SPEED_HIGH;
1164 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1165 usb->speed = USB_SPEED_LOW;
1167 usb->speed = USB_SPEED_FULL;
1169 dev->children[port] = usb;
1171 usb->portnr = port + 1;
1172 /* Run it through the hoops (find a driver, etc) */
1173 if (usb_new_device(usb)) {
1174 /* Woops, disable the port */
1175 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1176 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1181 int usb_hub_configure(struct usb_device *dev)
1184 unsigned char buffer[USB_BUFSIZ], *bitmap;
1185 struct usb_hub_descriptor *descriptor;
1186 struct usb_hub_device *hub;
1187 #ifdef USB_HUB_DEBUG
1188 struct usb_hub_status *hubsts;
1191 /* "allocate" Hub device */
1192 hub = usb_hub_allocate();
1195 hub->pusb_dev = dev;
1196 /* Get the the hub descriptor */
1197 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1198 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1199 "descriptor, giving up %lX\n", dev->status);
1202 descriptor = (struct usb_hub_descriptor *)buffer;
1204 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1205 i = descriptor->bLength;
1206 if (i > USB_BUFSIZ) {
1207 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1208 "descriptor - too long: %d\n",
1209 descriptor->bLength);
1213 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1214 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1215 "descriptor 2nd giving up %lX\n", dev->status);
1218 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1219 /* adjust 16bit values */
1220 hub->desc.wHubCharacteristics =
1221 le16_to_cpu(descriptor->wHubCharacteristics);
1222 /* set the bitmap */
1223 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1224 /* devices not removable by default */
1225 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1226 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1227 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1229 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1230 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1232 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1233 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
1235 dev->maxchild = descriptor->bNbrPorts;
1236 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1238 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1240 USB_HUB_PRINTF("ganged power switching\n");
1243 USB_HUB_PRINTF("individual port power switching\n");
1247 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1251 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1252 USB_HUB_PRINTF("part of a compound device\n");
1254 USB_HUB_PRINTF("standalone hub\n");
1256 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1258 USB_HUB_PRINTF("global over-current protection\n");
1261 USB_HUB_PRINTF("individual port over-current protection\n");
1265 USB_HUB_PRINTF("no over-current protection\n");
1269 USB_HUB_PRINTF("power on to power good time: %dms\n",
1270 descriptor->bPwrOn2PwrGood * 2);
1271 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1272 descriptor->bHubContrCurrent);
1274 for (i = 0; i < dev->maxchild; i++)
1275 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1276 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1277 (1 << ((i + 1) % 8)) ? " not" : "");
1279 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1280 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1281 "too long: %d\n", descriptor->bLength);
1285 if (usb_get_hub_status(dev, buffer) < 0) {
1286 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1291 #ifdef USB_HUB_DEBUG
1292 hubsts = (struct usb_hub_status *)buffer;
1294 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1295 le16_to_cpu(hubsts->wHubStatus),
1296 le16_to_cpu(hubsts->wHubChange));
1297 USB_HUB_PRINTF("local power source is %s\n",
1298 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1299 "lost (inactive)" : "good");
1300 USB_HUB_PRINTF("%sover-current condition exists\n",
1301 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1303 usb_hub_power_on(hub);
1305 for (i = 0; i < dev->maxchild; i++) {
1306 struct usb_port_status portsts;
1307 unsigned short portstatus, portchange;
1309 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1310 USB_HUB_PRINTF("get_port_status failed\n");
1314 portstatus = le16_to_cpu(portsts.wPortStatus);
1315 portchange = le16_to_cpu(portsts.wPortChange);
1316 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1317 i + 1, portstatus, portchange);
1319 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1320 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1321 usb_hub_port_connect_change(dev, i);
1323 if (portchange & USB_PORT_STAT_C_ENABLE) {
1324 USB_HUB_PRINTF("port %d enable change, status %x\n",
1326 usb_clear_port_feature(dev, i + 1,
1327 USB_PORT_FEAT_C_ENABLE);
1329 /* EM interference sometimes causes bad shielded USB
1330 * devices to be shutdown by the hub, this hack enables
1331 * them again. Works at least with mouse driver */
1332 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1333 (portstatus & USB_PORT_STAT_CONNECTION) &&
1334 ((dev->children[i]))) {
1335 USB_HUB_PRINTF("already running port %i " \
1336 "disabled by hub (EMI?), " \
1337 "re-enabling...\n", i + 1);
1338 usb_hub_port_connect_change(dev, i);
1341 if (portstatus & USB_PORT_STAT_SUSPEND) {
1342 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1343 usb_clear_port_feature(dev, i + 1,
1344 USB_PORT_FEAT_SUSPEND);
1347 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1348 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1349 usb_clear_port_feature(dev, i + 1,
1350 USB_PORT_FEAT_C_OVER_CURRENT);
1351 usb_hub_power_on(hub);
1354 if (portchange & USB_PORT_STAT_C_RESET) {
1355 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1356 usb_clear_port_feature(dev, i + 1,
1357 USB_PORT_FEAT_C_RESET);
1359 } /* end for i all ports */
1364 int usb_hub_probe(struct usb_device *dev, int ifnum)
1366 struct usb_interface *iface;
1367 struct usb_endpoint_descriptor *ep;
1370 iface = &dev->config.if_desc[ifnum];
1372 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1374 /* Some hubs have a subclass of 1, which AFAICT according to the */
1375 /* specs is not defined, but it works */
1376 if ((iface->desc.bInterfaceSubClass != 0) &&
1377 (iface->desc.bInterfaceSubClass != 1))
1379 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1380 if (iface->desc.bNumEndpoints != 1)
1382 ep = &iface->ep_desc[0];
1383 /* Output endpoint? Curiousier and curiousier.. */
1384 if (!(ep->bEndpointAddress & USB_DIR_IN))
1386 /* If it's not an interrupt endpoint, we'd better punt! */
1387 if ((ep->bmAttributes & 3) != 3)
1389 /* We found a hub */
1390 USB_HUB_PRINTF("USB hub found\n");
1391 ret = usb_hub_configure(dev);