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>
52 #include <asm/unaligned.h>
56 #include <asm/4xx_pci.h>
61 #define USB_HUB_DEBUG 1
64 #define USB_HUB_DEBUG 0
67 #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args)
68 #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args)
70 #define USB_BUFSIZ 512
72 static struct usb_device usb_dev[USB_MAX_DEVICE];
75 static int asynch_allowed;
76 static struct devrequest setup_packet;
78 char usb_started; /* flag for the started/stopped USB status */
80 /**********************************************************************
81 * some forward declerations...
83 static void usb_scan_devices(void);
85 static int usb_hub_probe(struct usb_device *dev, int ifnum);
86 static void usb_hub_reset(void);
87 static int hub_port_reset(struct usb_device *dev, int port,
88 unsigned short *portstat);
90 /***********************************************************************
94 inline void wait_ms(unsigned long ms)
100 /***************************************************************************
112 /* init low_level USB */
114 result = usb_lowlevel_init();
115 /* if lowlevel init is OK, scan the bus for devices
116 * i.e. search HUBs and configure them */
118 printf("scanning bus for devices... ");
124 printf("Error, couldn't init Lowlevel part\n");
130 /******************************************************************************
131 * Stop USB this stops the LowLevel Part and deregisters USB devices.
141 res = usb_lowlevel_stop();
147 * disables the asynch behaviour of the control message. This is used for data
148 * transfers that uses the exclusiv access to the control and bulk messages.
149 * Returns the old value so it can be restored later.
151 int usb_disable_asynch(int disable)
153 int old_value = asynch_allowed;
155 asynch_allowed = !disable;
160 /*-------------------------------------------------------------------
166 * submits an Interrupt Message
168 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
169 void *buffer, int transfer_len, int interval)
171 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
175 * submits a control message and waits for comletion (at least timeout * 1ms)
176 * If timeout is 0, we don't wait for completion (used as example to set and
177 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
178 * allow control messages with 0 timeout, by previousely resetting the flag
179 * asynch_allowed (usb_disable_asynch(1)).
180 * returns the transfered length if OK or -1 if error. The transfered length
181 * and the current status are stored in the dev->act_len and dev->status.
183 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
184 unsigned char request, unsigned char requesttype,
185 unsigned short value, unsigned short index,
186 void *data, unsigned short size, int timeout)
188 if ((timeout == 0) && (!asynch_allowed)) {
189 /* request for a asynch control pipe is not allowed */
193 /* set setup command */
194 setup_packet.requesttype = requesttype;
195 setup_packet.request = request;
196 setup_packet.value = cpu_to_le16(value);
197 setup_packet.index = cpu_to_le16(index);
198 setup_packet.length = cpu_to_le16(size);
199 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
200 "value 0x%X index 0x%X length 0x%X\n",
201 request, requesttype, value, index, size);
202 dev->status = USB_ST_NOT_PROC; /*not yet processed */
204 submit_control_msg(dev, pipe, data, size, &setup_packet);
209 * Wait for status to update until timeout expires, USB driver
210 * interrupt handler may set the status when the USB operation has
214 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
225 /*-------------------------------------------------------------------
226 * submits bulk message, and waits for completion. returns 0 if Ok or
228 * synchronous behavior
230 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
231 void *data, int len, int *actual_length, int timeout)
235 dev->status = USB_ST_NOT_PROC; /*not yet processed */
236 submit_bulk_msg(dev, pipe, data, len);
238 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
242 *actual_length = dev->act_len;
243 if (dev->status == 0)
250 /*-------------------------------------------------------------------
255 * returns the max packet size, depending on the pipe direction and
256 * the configurations values
258 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
260 /* direction is out -> use emaxpacket out */
261 if ((pipe & USB_DIR_IN) == 0)
262 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
264 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
268 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
269 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
270 * when it is inlined in 1 single routine. What happens is that the register r3
271 * is used as loop-count 'i', but gets overwritten later on.
272 * This is clearly a compiler bug, but it is easier to workaround it here than
273 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
274 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
276 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
278 static void __attribute__((noinline))
279 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
282 struct usb_endpoint_descriptor *ep;
283 u16 ep_wMaxPacketSize;
285 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
287 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
288 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
290 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
291 USB_ENDPOINT_XFER_CONTROL) {
292 /* Control => bidirectional */
293 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
294 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
295 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
296 b, dev->epmaxpacketin[b]);
298 if ((ep->bEndpointAddress & 0x80) == 0) {
300 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) {
301 dev->epmaxpacketout[b] = ep_wMaxPacketSize;
302 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
303 b, dev->epmaxpacketout[b]);
307 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
308 dev->epmaxpacketin[b] = ep_wMaxPacketSize;
309 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
310 b, dev->epmaxpacketin[b]);
317 * set the max packed value of all endpoints in the given configuration
319 static int usb_set_maxpacket(struct usb_device *dev)
323 for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
324 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
325 usb_set_maxpacket_ep(dev, i, ii);
330 /*******************************************************************************
331 * Parse the config, located in buffer, and fills the dev->config structure.
332 * Note that all little/big endian swapping are done automatically.
334 static int usb_parse_config(struct usb_device *dev,
335 unsigned char *buffer, int cfgno)
337 struct usb_descriptor_header *head;
338 int index, ifno, epno, curr_if_num;
340 u16 ep_wMaxPacketSize;
346 dev->configno = cfgno;
347 head = (struct usb_descriptor_header *) &buffer[0];
348 if (head->bDescriptorType != USB_DT_CONFIG) {
349 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
350 head->bDescriptorType);
353 memcpy(&dev->config, buffer, buffer[0]);
354 le16_to_cpus(&(dev->config.desc.wTotalLength));
355 dev->config.no_of_if = 0;
357 index = dev->config.desc.bLength;
358 /* Ok the first entry must be a configuration entry,
359 * now process the others */
360 head = (struct usb_descriptor_header *) &buffer[index];
361 while (index + 1 < dev->config.desc.wTotalLength) {
362 switch (head->bDescriptorType) {
363 case USB_DT_INTERFACE:
364 if (((struct usb_interface_descriptor *) \
365 &buffer[index])->bInterfaceNumber != curr_if_num) {
366 /* this is a new interface, copy new desc */
367 ifno = dev->config.no_of_if;
368 dev->config.no_of_if++;
369 memcpy(&dev->config.if_desc[ifno],
370 &buffer[index], buffer[index]);
371 dev->config.if_desc[ifno].no_of_ep = 0;
372 dev->config.if_desc[ifno].num_altsetting = 1;
374 dev->config.if_desc[ifno].desc.bInterfaceNumber;
376 /* found alternate setting for the interface */
377 dev->config.if_desc[ifno].num_altsetting++;
380 case USB_DT_ENDPOINT:
381 epno = dev->config.if_desc[ifno].no_of_ep;
382 /* found an endpoint */
383 dev->config.if_desc[ifno].no_of_ep++;
384 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
385 &buffer[index], buffer[index]);
386 ep_wMaxPacketSize = get_unaligned(&dev->config.\
390 put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
395 USB_PRINTF("if %d, ep %d\n", ifno, epno);
398 if (head->bLength == 0)
401 USB_PRINTF("unknown Description Type : %x\n",
402 head->bDescriptorType);
406 unsigned char *ch = (unsigned char *)head;
408 for (i = 0; i < head->bLength; i++)
409 USB_PRINTF("%02X ", *ch++);
410 USB_PRINTF("\n\n\n");
414 index += head->bLength;
415 head = (struct usb_descriptor_header *)&buffer[index];
420 /***********************************************************************
422 * endp: endpoint number in bits 0-3;
423 * direction flag in bit 7 (1 = IN, 0 = OUT)
425 int usb_clear_halt(struct usb_device *dev, int pipe)
428 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
430 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
431 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
432 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
434 /* don't clear if failed */
439 * NOTE: we do not get status and verify reset was successful
440 * as some devices are reported to lock up upon this check..
443 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
445 /* toggle is reset on clear */
446 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
451 /**********************************************************************
452 * get_descriptor type
454 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
455 unsigned char index, void *buf, int size)
458 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
459 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
460 (type << 8) + index, 0,
461 buf, size, USB_CNTL_TIMEOUT);
465 /**********************************************************************
466 * gets configuration cfgno and store it in the buffer
468 int usb_get_configuration_no(struct usb_device *dev,
469 unsigned char *buffer, int cfgno)
473 struct usb_configuration_descriptor *config;
475 config = (struct usb_configuration_descriptor *)&buffer[0];
476 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
479 printf("unable to get descriptor, error %lX\n",
482 printf("config descriptor too short " \
483 "(expected %i, got %i)\n", 9, result);
486 tmp = le16_to_cpu(config->wTotalLength);
488 if (tmp > USB_BUFSIZ) {
489 USB_PRINTF("usb_get_configuration_no: failed to get " \
490 "descriptor - too long: %d\n", tmp);
494 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
495 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
500 /********************************************************************
501 * set address of a device to the value in dev->devnum.
502 * This can only be done by addressing the device via the default address (0)
504 static int usb_set_address(struct usb_device *dev)
508 USB_PRINTF("set address %d\n", dev->devnum);
509 res = usb_control_msg(dev, usb_snddefctrl(dev),
510 USB_REQ_SET_ADDRESS, 0,
512 NULL, 0, USB_CNTL_TIMEOUT);
516 /********************************************************************
517 * set interface number to interface
519 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
521 struct usb_interface *if_face = NULL;
524 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
525 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
526 if_face = &dev->config.if_desc[i];
531 printf("selecting invalid interface %d", interface);
535 * We should return now for devices with only one alternate setting.
536 * According to 9.4.10 of the Universal Serial Bus Specification
537 * Revision 2.0 such devices can return with a STALL. This results in
538 * some USB sticks timeouting during initialization and then being
539 * unusable in U-Boot.
541 if (if_face->num_altsetting == 1)
544 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
545 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
546 alternate, interface, NULL, 0,
547 USB_CNTL_TIMEOUT * 5);
554 /********************************************************************
555 * set configuration number to configuration
557 static int usb_set_configuration(struct usb_device *dev, int configuration)
560 USB_PRINTF("set configuration %d\n", configuration);
561 /* set setup command */
562 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
563 USB_REQ_SET_CONFIGURATION, 0,
565 NULL, 0, USB_CNTL_TIMEOUT);
574 /********************************************************************
575 * set protocol to protocol
577 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
579 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
580 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
581 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
584 /********************************************************************
587 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
589 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
590 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
591 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
594 /********************************************************************
597 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
598 unsigned char id, void *buf, int size)
600 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
602 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
603 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
606 /********************************************************************
607 * get class descriptor
609 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
610 unsigned char type, unsigned char id, void *buf, int size)
612 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
613 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
614 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
617 /********************************************************************
618 * get string index in buffer
620 static int usb_get_string(struct usb_device *dev, unsigned short langid,
621 unsigned char index, void *buf, int size)
626 for (i = 0; i < 3; ++i) {
627 /* some devices are flaky */
628 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
629 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
630 (USB_DT_STRING << 8) + index, langid, buf, size,
641 static void usb_try_string_workarounds(unsigned char *buf, int *length)
643 int newlength, oldlength = *length;
645 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
646 if (!isprint(buf[newlength]) || buf[newlength + 1])
656 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
657 unsigned int index, unsigned char *buf)
661 /* Try to read the string descriptor by asking for the maximum
662 * possible number of bytes */
663 rc = usb_get_string(dev, langid, index, buf, 255);
665 /* If that failed try to read the descriptor length, then
666 * ask for just that many bytes */
668 rc = usb_get_string(dev, langid, index, buf, 2);
670 rc = usb_get_string(dev, langid, index, buf, buf[0]);
674 if (!buf[0] && !buf[1])
675 usb_try_string_workarounds(buf, &rc);
677 /* There might be extra junk at the end of the descriptor */
681 rc = rc - (rc & 1); /* force a multiple of two */
691 /********************************************************************
693 * Get string index and translate it to ascii.
694 * returns string length (> 0) or error (< 0)
696 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
698 unsigned char mybuf[USB_BUFSIZ];
703 if (size <= 0 || !buf || !index)
708 /* get langid for strings if it's not yet known */
709 if (!dev->have_langid) {
710 err = usb_string_sub(dev, 0, 0, tbuf);
712 USB_PRINTF("error getting string descriptor 0 " \
713 "(error=%lx)\n", dev->status);
715 } else if (tbuf[0] < 4) {
716 USB_PRINTF("string descriptor 0 too short\n");
719 dev->have_langid = -1;
720 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
721 /* always use the first langid listed */
722 USB_PRINTF("USB device number %d default " \
723 "language ID 0x%x\n",
724 dev->devnum, dev->string_langid);
728 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
732 size--; /* leave room for trailing NULL char in output buffer */
733 for (idx = 0, u = 2; u < err; u += 2) {
736 if (tbuf[u+1]) /* high byte */
737 buf[idx++] = '?'; /* non-ASCII character */
739 buf[idx++] = tbuf[u];
747 /********************************************************************
748 * USB device handling:
749 * the USB device are static allocated [USB_MAX_DEVICE].
753 /* returns a pointer to the device with the index [index].
754 * if the device is not assigned (dev->devnum==-1) returns NULL
756 struct usb_device *usb_get_dev_index(int index)
758 if (usb_dev[index].devnum == -1)
761 return &usb_dev[index];
765 /* returns a pointer of a new device structure or NULL, if
766 * no device struct is available
768 static struct usb_device *usb_alloc_new_device(void)
771 USB_PRINTF("New Device %d\n", dev_index);
772 if (dev_index == USB_MAX_DEVICE) {
773 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
776 /* default Address is 0, real addresses start with 1 */
777 usb_dev[dev_index].devnum = dev_index + 1;
778 usb_dev[dev_index].maxchild = 0;
779 for (i = 0; i < USB_MAXCHILDREN; i++)
780 usb_dev[dev_index].children[i] = NULL;
781 usb_dev[dev_index].parent = NULL;
783 return &usb_dev[dev_index - 1];
788 * By the time we get here, the device has gotten a new device ID
789 * and is in the default state. We need to identify the thing and
790 * get the ball rolling..
792 * Returns 0 for success, != 0 for error.
794 static int usb_new_device(struct usb_device *dev)
798 unsigned char tmpbuf[USB_BUFSIZ];
800 /* We still haven't set the Address yet */
804 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
805 /* this is the old and known way of initializing devices, it is
806 * different than what Windows and Linux are doing. Windows and Linux
807 * both retrieve 64 bytes while reading the device descriptor
808 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
809 * invalid header while reading 8 bytes as device descriptor. */
810 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
811 dev->maxpacketsize = PACKET_SIZE_8;
812 dev->epmaxpacketin[0] = 8;
813 dev->epmaxpacketout[0] = 8;
815 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
817 printf("\n USB device not responding, " \
818 "giving up (status=%lX)\n", dev->status);
822 /* This is a Windows scheme of initialization sequence, with double
823 * reset of the device (Linux uses the same sequence)
824 * Some equipment is said to work only with such init sequence; this
825 * patch is based on the work by Alan Stern:
826 * http://sourceforge.net/mailarchive/forum.php?
827 * thread_id=5729457&forum_id=5398
829 struct usb_device_descriptor *desc;
831 struct usb_device *parent = dev->parent;
832 unsigned short portstatus;
834 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
835 * only 18 bytes long, this will terminate with a short packet. But if
836 * the maxpacket size is 8 or 16 the device may be waiting to transmit
837 * some more, or keeps on retransmitting the 8 byte header. */
839 desc = (struct usb_device_descriptor *)tmpbuf;
840 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
841 /* Default to 64 byte max packet size */
842 dev->maxpacketsize = PACKET_SIZE_64;
843 dev->epmaxpacketin[0] = 64;
844 dev->epmaxpacketout[0] = 64;
846 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
848 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
852 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
854 /* find the port number we're at */
858 for (j = 0; j < parent->maxchild; j++) {
859 if (parent->children[j] == dev) {
865 printf("usb_new_device:cannot locate device's port.\n");
869 /* reset the port for the second time */
870 err = hub_port_reset(dev->parent, port, &portstatus);
872 printf("\n Couldn't reset port %i\n", port);
878 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
879 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
880 switch (dev->descriptor.bMaxPacketSize0) {
882 dev->maxpacketsize = PACKET_SIZE_8;
885 dev->maxpacketsize = PACKET_SIZE_16;
888 dev->maxpacketsize = PACKET_SIZE_32;
891 dev->maxpacketsize = PACKET_SIZE_64;
896 err = usb_set_address(dev); /* set address */
899 printf("\n USB device not accepting new address " \
900 "(error=%lX)\n", dev->status);
904 wait_ms(10); /* Let the SET_ADDRESS settle */
906 tmp = sizeof(dev->descriptor);
908 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
909 &dev->descriptor, sizeof(dev->descriptor));
912 printf("unable to get device descriptor (error=%d)\n",
915 printf("USB device descriptor short read " \
916 "(expected %i, got %i)\n", tmp, err);
919 /* correct le values */
920 le16_to_cpus(&dev->descriptor.bcdUSB);
921 le16_to_cpus(&dev->descriptor.idVendor);
922 le16_to_cpus(&dev->descriptor.idProduct);
923 le16_to_cpus(&dev->descriptor.bcdDevice);
924 /* only support for one config for now */
925 usb_get_configuration_no(dev, &tmpbuf[0], 0);
926 usb_parse_config(dev, &tmpbuf[0], 0);
927 usb_set_maxpacket(dev);
928 /* we set the default configuration here */
929 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
930 printf("failed to set default configuration " \
931 "len %d, status %lX\n", dev->act_len, dev->status);
934 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
935 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
936 dev->descriptor.iSerialNumber);
937 memset(dev->mf, 0, sizeof(dev->mf));
938 memset(dev->prod, 0, sizeof(dev->prod));
939 memset(dev->serial, 0, sizeof(dev->serial));
940 if (dev->descriptor.iManufacturer)
941 usb_string(dev, dev->descriptor.iManufacturer,
942 dev->mf, sizeof(dev->mf));
943 if (dev->descriptor.iProduct)
944 usb_string(dev, dev->descriptor.iProduct,
945 dev->prod, sizeof(dev->prod));
946 if (dev->descriptor.iSerialNumber)
947 usb_string(dev, dev->descriptor.iSerialNumber,
948 dev->serial, sizeof(dev->serial));
949 USB_PRINTF("Manufacturer %s\n", dev->mf);
950 USB_PRINTF("Product %s\n", dev->prod);
951 USB_PRINTF("SerialNumber %s\n", dev->serial);
952 /* now prode if the device is a hub */
953 usb_hub_probe(dev, 0);
957 /* build device Tree */
958 static void usb_scan_devices(void)
961 struct usb_device *dev;
963 /* first make all devices unknown */
964 for (i = 0; i < USB_MAX_DEVICE; i++) {
965 memset(&usb_dev[i], 0, sizeof(struct usb_device));
966 usb_dev[i].devnum = -1;
969 /* device 0 is always present (root hub, so let it analyze) */
970 dev = usb_alloc_new_device();
971 if (usb_new_device(dev))
972 printf("No USB Device found\n");
974 printf("%d USB Device(s) found\n", dev_index);
975 /* insert "driver" if possible */
976 #ifdef CONFIG_USB_KEYBOARD
979 USB_PRINTF("scan end\n");
983 /****************************************************************************
985 * Probes device for being a hub and configurate it
988 static struct usb_hub_device hub_dev[USB_MAX_HUB];
989 static int usb_hub_index;
992 static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
994 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
995 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
996 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
999 static int usb_clear_hub_feature(struct usb_device *dev, int feature)
1001 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1002 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
1003 0, NULL, 0, USB_CNTL_TIMEOUT);
1006 static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
1008 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1009 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
1010 port, NULL, 0, USB_CNTL_TIMEOUT);
1013 static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
1015 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1016 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
1017 port, NULL, 0, USB_CNTL_TIMEOUT);
1020 static int usb_get_hub_status(struct usb_device *dev, void *data)
1022 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1023 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1024 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1027 static int usb_get_port_status(struct usb_device *dev, int port, void *data)
1029 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1030 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1031 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1035 static void usb_hub_power_on(struct usb_hub_device *hub)
1038 struct usb_device *dev;
1040 dev = hub->pusb_dev;
1041 /* Enable power to the ports */
1042 USB_HUB_PRINTF("enabling power on all ports\n");
1043 for (i = 0; i < dev->maxchild; i++) {
1044 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
1045 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
1046 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1050 static void usb_hub_reset(void)
1055 static struct usb_hub_device *usb_hub_allocate(void)
1057 if (usb_hub_index < USB_MAX_HUB)
1058 return &hub_dev[usb_hub_index++];
1060 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
1066 static inline char *portspeed(int portstatus)
1068 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1070 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1076 static int hub_port_reset(struct usb_device *dev, int port,
1077 unsigned short *portstat)
1080 struct usb_port_status portsts;
1081 unsigned short portstatus, portchange;
1083 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
1084 for (tries = 0; tries < MAX_TRIES; tries++) {
1086 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1089 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1090 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1094 portstatus = le16_to_cpu(portsts.wPortStatus);
1095 portchange = le16_to_cpu(portsts.wPortChange);
1097 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1098 portstatus, portchange,
1099 portspeed(portstatus));
1101 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1102 " USB_PORT_STAT_ENABLE %d\n",
1103 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1104 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1105 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
1107 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1108 !(portstatus & USB_PORT_STAT_CONNECTION))
1111 if (portstatus & USB_PORT_STAT_ENABLE)
1117 if (tries == MAX_TRIES) {
1118 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1119 "disabling port.\n", port + 1, MAX_TRIES);
1120 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1124 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1125 *portstat = portstatus;
1130 void usb_hub_port_connect_change(struct usb_device *dev, int port)
1132 struct usb_device *usb;
1133 struct usb_port_status portsts;
1134 unsigned short portstatus;
1137 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1138 USB_HUB_PRINTF("get_port_status failed\n");
1142 portstatus = le16_to_cpu(portsts.wPortStatus);
1143 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1145 le16_to_cpu(portsts.wPortChange),
1146 portspeed(portstatus));
1148 /* Clear the connection change status */
1149 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1151 /* Disconnect any existing devices under this port */
1152 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1153 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
1154 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1155 /* Return now if nothing is connected */
1156 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1161 /* Reset the port */
1162 if (hub_port_reset(dev, port, &portstatus) < 0) {
1163 printf("cannot reset port %i!?\n", port + 1);
1169 /* Allocate a new device struct for it */
1170 usb = usb_alloc_new_device();
1172 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1173 usb->speed = USB_SPEED_HIGH;
1174 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1175 usb->speed = USB_SPEED_LOW;
1177 usb->speed = USB_SPEED_FULL;
1179 dev->children[port] = usb;
1181 usb->portnr = port + 1;
1182 /* Run it through the hoops (find a driver, etc) */
1183 if (usb_new_device(usb)) {
1184 /* Woops, disable the port */
1185 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1186 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1191 static int usb_hub_configure(struct usb_device *dev)
1194 unsigned char buffer[USB_BUFSIZ], *bitmap;
1195 struct usb_hub_descriptor *descriptor;
1196 struct usb_hub_device *hub;
1197 #ifdef USB_HUB_DEBUG
1198 struct usb_hub_status *hubsts;
1201 /* "allocate" Hub device */
1202 hub = usb_hub_allocate();
1205 hub->pusb_dev = dev;
1206 /* Get the the hub descriptor */
1207 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1208 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1209 "descriptor, giving up %lX\n", dev->status);
1212 descriptor = (struct usb_hub_descriptor *)buffer;
1214 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1215 i = descriptor->bLength;
1216 if (i > USB_BUFSIZ) {
1217 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1218 "descriptor - too long: %d\n",
1219 descriptor->bLength);
1223 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1224 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1225 "descriptor 2nd giving up %lX\n", dev->status);
1228 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
1229 /* adjust 16bit values */
1230 hub->desc.wHubCharacteristics =
1231 le16_to_cpu(descriptor->wHubCharacteristics);
1232 /* set the bitmap */
1233 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1234 /* devices not removable by default */
1235 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1236 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1237 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1239 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1240 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1242 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1243 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
1245 dev->maxchild = descriptor->bNbrPorts;
1246 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1248 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1250 USB_HUB_PRINTF("ganged power switching\n");
1253 USB_HUB_PRINTF("individual port power switching\n");
1257 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1261 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1262 USB_HUB_PRINTF("part of a compound device\n");
1264 USB_HUB_PRINTF("standalone hub\n");
1266 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1268 USB_HUB_PRINTF("global over-current protection\n");
1271 USB_HUB_PRINTF("individual port over-current protection\n");
1275 USB_HUB_PRINTF("no over-current protection\n");
1279 USB_HUB_PRINTF("power on to power good time: %dms\n",
1280 descriptor->bPwrOn2PwrGood * 2);
1281 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1282 descriptor->bHubContrCurrent);
1284 for (i = 0; i < dev->maxchild; i++)
1285 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1286 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1287 (1 << ((i + 1) % 8)) ? " not" : "");
1289 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1290 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1291 "too long: %d\n", descriptor->bLength);
1295 if (usb_get_hub_status(dev, buffer) < 0) {
1296 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1301 #ifdef USB_HUB_DEBUG
1302 hubsts = (struct usb_hub_status *)buffer;
1304 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1305 le16_to_cpu(hubsts->wHubStatus),
1306 le16_to_cpu(hubsts->wHubChange));
1307 USB_HUB_PRINTF("local power source is %s\n",
1308 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1309 "lost (inactive)" : "good");
1310 USB_HUB_PRINTF("%sover-current condition exists\n",
1311 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1313 usb_hub_power_on(hub);
1315 for (i = 0; i < dev->maxchild; i++) {
1316 struct usb_port_status portsts;
1317 unsigned short portstatus, portchange;
1319 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1320 USB_HUB_PRINTF("get_port_status failed\n");
1324 portstatus = le16_to_cpu(portsts.wPortStatus);
1325 portchange = le16_to_cpu(portsts.wPortChange);
1326 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1327 i + 1, portstatus, portchange);
1329 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1330 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1331 usb_hub_port_connect_change(dev, i);
1333 if (portchange & USB_PORT_STAT_C_ENABLE) {
1334 USB_HUB_PRINTF("port %d enable change, status %x\n",
1336 usb_clear_port_feature(dev, i + 1,
1337 USB_PORT_FEAT_C_ENABLE);
1339 /* EM interference sometimes causes bad shielded USB
1340 * devices to be shutdown by the hub, this hack enables
1341 * them again. Works at least with mouse driver */
1342 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1343 (portstatus & USB_PORT_STAT_CONNECTION) &&
1344 ((dev->children[i]))) {
1345 USB_HUB_PRINTF("already running port %i " \
1346 "disabled by hub (EMI?), " \
1347 "re-enabling...\n", i + 1);
1348 usb_hub_port_connect_change(dev, i);
1351 if (portstatus & USB_PORT_STAT_SUSPEND) {
1352 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1353 usb_clear_port_feature(dev, i + 1,
1354 USB_PORT_FEAT_SUSPEND);
1357 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1358 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1359 usb_clear_port_feature(dev, i + 1,
1360 USB_PORT_FEAT_C_OVER_CURRENT);
1361 usb_hub_power_on(hub);
1364 if (portchange & USB_PORT_STAT_C_RESET) {
1365 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1366 usb_clear_port_feature(dev, i + 1,
1367 USB_PORT_FEAT_C_RESET);
1369 } /* end for i all ports */
1374 static int usb_hub_probe(struct usb_device *dev, int ifnum)
1376 struct usb_interface *iface;
1377 struct usb_endpoint_descriptor *ep;
1380 iface = &dev->config.if_desc[ifnum];
1382 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
1384 /* Some hubs have a subclass of 1, which AFAICT according to the */
1385 /* specs is not defined, but it works */
1386 if ((iface->desc.bInterfaceSubClass != 0) &&
1387 (iface->desc.bInterfaceSubClass != 1))
1389 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1390 if (iface->desc.bNumEndpoints != 1)
1392 ep = &iface->ep_desc[0];
1393 /* Output endpoint? Curiousier and curiousier.. */
1394 if (!(ep->bEndpointAddress & USB_DIR_IN))
1396 /* If it's not an interrupt endpoint, we'd better punt! */
1397 if ((ep->bmAttributes & 3) != 3)
1399 /* We found a hub */
1400 USB_HUB_PRINTF("USB hub found\n");
1401 ret = usb_hub_configure(dev);