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>
52 #if (CONFIG_COMMANDS & CFG_CMD_USB)
56 #include <405gp_pci.h>
62 #define USB_PRINTF(fmt,args...) printf (fmt ,##args)
64 #define USB_PRINTF(fmt,args...)
67 #define USB_BUFSIZ 512
69 static struct usb_device usb_dev[USB_MAX_DEVICE];
72 static int asynch_allowed;
73 static struct devrequest setup_packet;
75 /**********************************************************************
76 * some forward declerations...
78 void usb_scan_devices(void);
80 int usb_hub_probe(struct usb_device *dev, int ifnum);
81 void usb_hub_reset(void);
84 /***********************************************************************
88 void __inline__ wait_ms(unsigned long ms)
93 /***************************************************************************
105 /* init low_level USB */
107 result = usb_lowlevel_init();
108 /* if lowlevel init is OK, scan the bus for devices i.e. search HUBs and configure them */
110 printf("scanning bus for devices... ");
116 printf("Error, couldn't init Lowlevel part\n");
121 /******************************************************************************
122 * Stop USB this stops the LowLevel Part and deregisters USB devices.
128 return usb_lowlevel_stop();
132 * disables the asynch behaviour of the control message. This is used for data
133 * transfers that uses the exclusiv access to the control and bulk messages.
135 void usb_disable_asynch(int disable)
137 asynch_allowed=!disable;
141 /*-------------------------------------------------------------------
147 * submits an Interrupt Message
149 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
150 void *buffer,int transfer_len, int interval)
152 return submit_int_msg(dev,pipe,buffer,transfer_len,interval);
156 * submits a control message and waits for comletion (at least timeout * 1ms)
157 * If timeout is 0, we don't wait for completion (used as example to set and
158 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
159 * allow control messages with 0 timeout, by previousely resetting the flag
160 * asynch_allowed (usb_disable_asynch(1)).
161 * returns the transfered length if OK or -1 if error. The transfered length
162 * and the current status are stored in the dev->act_len and dev->status.
164 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
165 unsigned char request, unsigned char requesttype,
166 unsigned short value, unsigned short index,
167 void *data, unsigned short size, int timeout)
169 if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
172 /* set setup command */
173 setup_packet.requesttype = requesttype;
174 setup_packet.request = request;
175 setup_packet.value = swap_16(value);
176 setup_packet.index = swap_16(index);
177 setup_packet.length = swap_16(size);
178 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue 0x%X index 0x%X length 0x%X\n",
179 request,requesttype,value,index,size);
180 dev->status=USB_ST_NOT_PROC; /*not yet processed */
182 submit_control_msg(dev,pipe,data,size,&setup_packet);
187 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
198 /*-------------------------------------------------------------------
199 * submits bulk message, and waits for completion. returns 0 if Ok or
201 * synchronous behavior
203 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
204 void *data, int len, int *actual_length, int timeout)
208 dev->status=USB_ST_NOT_PROC; /*not yet processed */
209 submit_bulk_msg(dev,pipe,data,len);
211 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
215 *actual_length=dev->act_len;
223 /*-------------------------------------------------------------------
228 * returns the max packet size, depending on the pipe direction and
229 * the configurations values
231 int usb_maxpacket(struct usb_device *dev,unsigned long pipe)
233 if((pipe & USB_DIR_IN)==0) /* direction is out -> use emaxpacket out */
234 return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
236 return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
240 * set the max packed value of all endpoints in the given configuration
242 int usb_set_maxpacket(struct usb_device *dev)
245 struct usb_endpoint_descriptor *ep;
247 for(i=0; i<dev->config.bNumInterfaces;i++) {
248 for(ii=0; ii<dev->config.if_desc[i].bNumEndpoints; ii++) {
249 ep=&dev->config.if_desc[i].ep_desc[ii];
250 b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
252 if((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)==USB_ENDPOINT_XFER_CONTROL) { /* Control => bidirectional */
253 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
254 dev->epmaxpacketin [b] = ep->wMaxPacketSize;
255 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",b,dev->epmaxpacketin[b]);
258 if ((ep->bEndpointAddress & 0x80)==0) { /* OUT Endpoint */
259 if(ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
260 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
261 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",b,dev->epmaxpacketout[b]);
264 else { /* IN Endpoint */
265 if(ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
266 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
267 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",b,dev->epmaxpacketin[b]);
271 } /* for each endpoint */
276 /*******************************************************************************
277 * Parse the config, located in buffer, and fills the dev->config structure.
278 * Note that all little/big endian swapping are done automatically.
280 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
282 struct usb_descriptor_header *head;
288 head =(struct usb_descriptor_header *)&buffer[0];
289 if(head->bDescriptorType!=USB_DT_CONFIG) {
290 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
293 memcpy(&dev->config,buffer,buffer[0]);
294 dev->config.wTotalLength=swap_16(dev->config.wTotalLength);
295 dev->config.no_of_if=0;
297 index=dev->config.bLength;
298 /* Ok the first entry must be a configuration entry, now process the others */
299 head=(struct usb_descriptor_header *)&buffer[index];
300 while(index+1 < dev->config.wTotalLength) {
301 switch(head->bDescriptorType) {
302 case USB_DT_INTERFACE:
303 ifno=dev->config.no_of_if;
304 dev->config.no_of_if++; /* found an interface desc, increase numbers */
305 memcpy(&dev->config.if_desc[ifno],&buffer[index],buffer[index]); /* copy new desc */
306 dev->config.if_desc[ifno].no_of_ep=0;
309 case USB_DT_ENDPOINT:
310 epno=dev->config.if_desc[ifno].no_of_ep;
311 dev->config.if_desc[ifno].no_of_ep++; /* found an endpoint */
312 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],&buffer[index],buffer[index]);
313 dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize
314 =swap_16(dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
315 USB_PRINTF("if %d, ep %d\n",ifno,epno);
320 USB_PRINTF("unknown Description Type : %x\n",head->bDescriptorType);
324 ch=(unsigned char *)head;
325 for(i=0;i<head->bLength; i++)
326 USB_PRINTF("%02X ",*ch++);
327 USB_PRINTF("\n\n\n");
331 index+=head->bLength;
332 head=(struct usb_descriptor_header *)&buffer[index];
337 /***********************************************************************
339 * endp: endpoint number in bits 0-3;
340 * direction flag in bit 7 (1 = IN, 0 = OUT)
342 int usb_clear_halt(struct usb_device *dev, int pipe)
345 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
347 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
348 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
350 /* don't clear if failed */
355 * NOTE: we do not get status and verify reset was successful
356 * as some devices are reported to lock up upon this check..
359 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
361 /* toggle is reset on clear */
362 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
367 /**********************************************************************
368 * get_descriptor type
370 int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
373 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
374 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
375 (type << 8) + index, 0,
376 buf, size, USB_CNTL_TIMEOUT);
380 /**********************************************************************
381 * gets configuration cfgno and store it in the buffer
383 int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno)
387 struct usb_config_descriptor *config;
390 config=(struct usb_config_descriptor *)&buffer[0];
391 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
394 printf("unable to get descriptor, error %lX\n",dev->status);
396 printf("config descriptor too short (expected %i, got %i)\n",8,result);
399 tmp=swap_16(config->wTotalLength);
401 if (tmp > USB_BUFSIZ) {
402 USB_PRINTF("usb_get_configuration_no: failed to get descriptor - too long: %d\n",
407 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
408 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",cfgno,result,tmp);
412 /********************************************************************
413 * set address of a device to the value in dev->devnum.
414 * This can only be done by addressing the device via the default address (0)
416 int usb_set_address(struct usb_device *dev)
420 USB_PRINTF("set address %d\n",dev->devnum);
421 res=usb_control_msg(dev, usb_snddefctrl(dev),
422 USB_REQ_SET_ADDRESS, 0,
424 NULL,0, USB_CNTL_TIMEOUT);
428 /********************************************************************
429 * set interface number to interface
431 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
433 struct usb_interface_descriptor *if_face = NULL;
436 for (i = 0; i < dev->config.bNumInterfaces; i++) {
437 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
438 if_face = &dev->config.if_desc[i];
443 printf("selecting invalid interface %d", interface);
447 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
448 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
449 interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
455 /********************************************************************
456 * set configuration number to configuration
458 int usb_set_configuration(struct usb_device *dev, int configuration)
461 USB_PRINTF("set configuration %d\n",configuration);
462 /* set setup command */
463 res=usb_control_msg(dev, usb_sndctrlpipe(dev,0),
464 USB_REQ_SET_CONFIGURATION, 0,
466 NULL,0, USB_CNTL_TIMEOUT);
476 /********************************************************************
477 * set protocol to protocol
479 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
481 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
482 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
483 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
486 /********************************************************************
489 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
491 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
492 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
493 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
496 /********************************************************************
499 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
501 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
502 USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
503 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
506 /********************************************************************
507 * get class descriptor
509 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
510 unsigned char type, unsigned char id, void *buf, int size)
512 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
513 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
514 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
517 /********************************************************************
518 * get string index in buffer
520 int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
525 for (i = 0; i < 3; ++i) {
526 /* some devices are flaky */
527 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
528 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
529 (USB_DT_STRING << 8) + index, langid, buf, size,
540 static void usb_try_string_workarounds(unsigned char *buf, int *length)
542 int newlength, oldlength = *length;
544 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
545 if (!isprint(buf[newlength]) || buf[newlength + 1])
555 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
556 unsigned int index, unsigned char *buf)
560 /* Try to read the string descriptor by asking for the maximum
561 * possible number of bytes */
562 rc = usb_get_string(dev, langid, index, buf, 255);
564 /* If that failed try to read the descriptor length, then
565 * ask for just that many bytes */
567 rc = usb_get_string(dev, langid, index, buf, 2);
569 rc = usb_get_string(dev, langid, index, buf, buf[0]);
573 if (!buf[0] && !buf[1])
574 usb_try_string_workarounds(buf, &rc);
576 /* There might be extra junk at the end of the descriptor */
580 rc = rc - (rc & 1); /* force a multiple of two */
590 /********************************************************************
592 * Get string index and translate it to ascii.
593 * returns string length (> 0) or error (< 0)
595 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
597 unsigned char mybuf[USB_BUFSIZ];
602 if (size <= 0 || !buf || !index)
607 /* get langid for strings if it's not yet known */
608 if (!dev->have_langid) {
609 err = usb_string_sub(dev, 0, 0, tbuf);
611 USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
613 } else if (tbuf[0] < 4) {
614 USB_PRINTF("string descriptor 0 too short\n");
617 dev->have_langid = -1;
618 dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
619 /* always use the first langid listed */
620 USB_PRINTF("USB device number %d default language ID 0x%x\n",
621 dev->devnum, dev->string_langid);
625 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
629 size--; /* leave room for trailing NULL char in output buffer */
630 for (idx = 0, u = 2; u < err; u += 2) {
633 if (tbuf[u+1]) /* high byte */
634 buf[idx++] = '?'; /* non-ASCII character */
636 buf[idx++] = tbuf[u];
644 /********************************************************************
645 * USB device handling:
646 * the USB device are static allocated [USB_MAX_DEVICE].
650 /* returns a pointer to the device with the index [index].
651 * if the device is not assigned (dev->devnum==-1) returns NULL
653 struct usb_device * usb_get_dev_index(int index)
655 if(usb_dev[index].devnum==-1)
658 return &usb_dev[index];
662 /* returns a pointer of a new device structure or NULL, if
663 * no device struct is available
665 struct usb_device * usb_alloc_new_device(void)
668 USB_PRINTF("New Device %d\n",dev_index);
669 if(dev_index==USB_MAX_DEVICE) {
670 printf("ERROR, too many USB Devices, max=%d\n",USB_MAX_DEVICE);
673 usb_dev[dev_index].devnum=dev_index+1; /* default Address is 0, real addresses start with 1 */
674 usb_dev[dev_index].maxchild=0;
675 for(i=0;i<USB_MAXCHILDREN;i++)
676 usb_dev[dev_index].children[i]=NULL;
677 usb_dev[dev_index].parent=NULL;
679 return &usb_dev[dev_index-1];
684 * By the time we get here, the device has gotten a new device ID
685 * and is in the default state. We need to identify the thing and
686 * get the ball rolling..
688 * Returns 0 for success, != 0 for error.
690 int usb_new_device(struct usb_device *dev)
694 unsigned char tmpbuf[USB_BUFSIZ];
696 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
697 dev->maxpacketsize = 0; /* Default to 8 byte max packet size */
698 dev->epmaxpacketin [0] = 8;
699 dev->epmaxpacketout[0] = 8;
701 /* We still haven't set the Address yet */
707 /* this is a Windows scheme of initialization sequence, with double
708 * reset of the device. Some equipment is said to work only with such
709 * init sequence; this patch is based on the work by Alan Stern:
710 * http://sourceforge.net/mailarchive/forum.php?thread_id=5729457&forum_id=5398
713 struct usb_device_descriptor *desc;
715 struct usb_device *parent = dev->parent;
716 unsigned short portstatus;
718 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
719 * only 18 bytes long, this will terminate with a short packet. But if
720 * the maxpacket size is 8 or 16 the device may be waiting to transmit
723 desc = (struct usb_device_descriptor *)tmpbuf;
724 desc->bMaxPacketSize0 = 0;
725 for (j = 0; j < 3; ++j) {
726 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
728 USB_PRINTF("usb_new_device: 64 byte descr\n");
732 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
734 /* find the port number we're at */
737 for (j = 0; j < parent->maxchild; j++) {
738 if (parent->children[j] == dev) {
744 printf("usb_new_device: cannot locate device's port..\n");
748 /* reset the port for the second time */
749 err = hub_port_reset(dev->parent, port, &portstatus);
751 printf("\n Couldn't reset port %i\n", port);
756 /* and this is the old and known way of initializing devices */
757 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
759 printf("\n USB device not responding, giving up (status=%lX)\n",dev->status);
764 dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
765 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
766 switch (dev->descriptor.bMaxPacketSize0) {
767 case 8: dev->maxpacketsize = 0; break;
768 case 16: dev->maxpacketsize = 1; break;
769 case 32: dev->maxpacketsize = 2; break;
770 case 64: dev->maxpacketsize = 3; break;
774 err = usb_set_address(dev); /* set address */
777 printf("\n USB device not accepting new address (error=%lX)\n", dev->status);
781 wait_ms(10); /* Let the SET_ADDRESS settle */
783 tmp = sizeof(dev->descriptor);
785 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, sizeof(dev->descriptor));
788 printf("unable to get device descriptor (error=%d)\n",err);
790 printf("USB device descriptor short read (expected %i, got %i)\n",tmp,err);
793 /* correct le values */
794 dev->descriptor.bcdUSB=swap_16(dev->descriptor.bcdUSB);
795 dev->descriptor.idVendor=swap_16(dev->descriptor.idVendor);
796 dev->descriptor.idProduct=swap_16(dev->descriptor.idProduct);
797 dev->descriptor.bcdDevice=swap_16(dev->descriptor.bcdDevice);
798 /* only support for one config for now */
799 usb_get_configuration_no(dev,&tmpbuf[0],0);
800 usb_parse_config(dev,&tmpbuf[0],0);
801 usb_set_maxpacket(dev);
802 /* we set the default configuration here */
803 if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
804 printf("failed to set default configuration len %d, status %lX\n",dev->act_len,dev->status);
807 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
808 dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber);
809 memset(dev->mf, 0, sizeof(dev->mf));
810 memset(dev->prod, 0, sizeof(dev->prod));
811 memset(dev->serial, 0, sizeof(dev->serial));
812 if (dev->descriptor.iManufacturer)
813 usb_string(dev, dev->descriptor.iManufacturer, dev->mf, sizeof(dev->mf));
814 if (dev->descriptor.iProduct)
815 usb_string(dev, dev->descriptor.iProduct, dev->prod, sizeof(dev->prod));
816 if (dev->descriptor.iSerialNumber)
817 usb_string(dev, dev->descriptor.iSerialNumber, dev->serial, sizeof(dev->serial));
818 USB_PRINTF("Manufacturer %s\n", dev->mf);
819 USB_PRINTF("Product %s\n", dev->prod);
820 USB_PRINTF("SerialNumber %s\n", dev->serial);
821 /* now prode if the device is a hub */
822 usb_hub_probe(dev,0);
826 /* build device Tree */
827 void usb_scan_devices(void)
830 struct usb_device *dev;
832 /* first make all devices unknown */
833 for(i=0;i<USB_MAX_DEVICE;i++) {
834 memset(&usb_dev[i],0,sizeof(struct usb_device));
835 usb_dev[i].devnum=-1;
838 /* device 0 is always present (root hub, so let it analyze) */
839 dev=usb_alloc_new_device();
841 printf("%d USB Device(s) found\n",dev_index);
842 /* insert "driver" if possible */
843 #ifdef CONFIG_USB_KEYBOARD
845 USB_PRINTF("scan end\n");
850 /****************************************************************************
852 * Probes device for being a hub and configurate it
858 #define USB_HUB_PRINTF(fmt,args...) printf (fmt ,##args)
860 #define USB_HUB_PRINTF(fmt,args...)
864 static struct usb_hub_device hub_dev[USB_MAX_HUB];
865 static int usb_hub_index;
868 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
870 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
871 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
872 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
875 int usb_clear_hub_feature(struct usb_device *dev, int feature)
877 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
878 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
881 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
883 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
884 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
887 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
889 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
890 USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
893 int usb_get_hub_status(struct usb_device *dev, void *data)
895 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
896 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
897 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
900 int usb_get_port_status(struct usb_device *dev, int port, void *data)
902 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
903 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
904 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
908 static void usb_hub_power_on(struct usb_hub_device *hub)
911 struct usb_device *dev;
914 /* Enable power to the ports */
915 USB_HUB_PRINTF("enabling power on all ports\n");
916 for (i = 0; i < dev->maxchild; i++) {
917 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
918 USB_HUB_PRINTF("port %d returns %lX\n",i+1,dev->status);
919 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
923 void usb_hub_reset(void)
928 struct usb_hub_device *usb_hub_allocate(void)
930 if(usb_hub_index<USB_MAX_HUB) {
931 return &hub_dev[usb_hub_index++];
933 printf("ERROR: USB_MAX_HUB (%d) reached\n",USB_MAX_HUB);
939 static int hub_port_reset(struct usb_device *dev, int port,
940 unsigned short *portstat)
943 struct usb_port_status portsts;
944 unsigned short portstatus, portchange;
947 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
948 for(tries=0;tries<MAX_TRIES;tries++) {
950 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
953 if (usb_get_port_status(dev, port + 1, &portsts)<0) {
954 USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
957 portstatus = swap_16(portsts.wPortStatus);
958 portchange = swap_16(portsts.wPortChange);
959 USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus ,portchange,
960 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
961 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d USB_PORT_STAT_ENABLE %d\n",
962 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
963 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
964 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
965 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
966 !(portstatus & USB_PORT_STAT_CONNECTION))
969 if (portstatus & USB_PORT_STAT_ENABLE) {
977 if (tries==MAX_TRIES) {
978 USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
979 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
983 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
984 *portstat = portstatus;
990 void usb_hub_port_connect_change(struct usb_device *dev, int port)
992 struct usb_device *usb;
993 struct usb_port_status portsts;
994 unsigned short portstatus, portchange;
997 if (usb_get_port_status(dev, port + 1, &portsts)<0) {
998 USB_HUB_PRINTF("get_port_status failed\n");
1002 portstatus = swap_16(portsts.wPortStatus);
1003 portchange = swap_16(portsts.wPortChange);
1004 USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
1005 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
1007 /* Clear the connection change status */
1008 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1010 /* Disconnect any existing devices under this port */
1011 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1012 (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
1013 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1014 /* Return now if nothing is connected */
1015 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1020 /* Reset the port */
1021 if (hub_port_reset(dev, port, &portstatus) < 0) {
1022 printf("cannot reset port %i!?\n", port + 1);
1028 /* Allocate a new device struct for it */
1029 usb=usb_alloc_new_device();
1030 usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
1032 dev->children[port] = usb;
1034 /* Run it through the hoops (find a driver, etc) */
1035 if (usb_new_device(usb)) {
1036 /* Woops, disable the port */
1037 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1038 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1043 int usb_hub_configure(struct usb_device *dev)
1045 unsigned char buffer[USB_BUFSIZ], *bitmap;
1046 struct usb_hub_descriptor *descriptor;
1047 struct usb_hub_status *hubsts;
1049 struct usb_hub_device *hub;
1051 /* "allocate" Hub device */
1052 hub=usb_hub_allocate();
1056 /* Get the the hub descriptor */
1057 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1058 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor, giving up %lX\n",dev->status);
1061 descriptor = (struct usb_hub_descriptor *)buffer;
1063 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1064 i = descriptor->bLength;
1065 if (i > USB_BUFSIZ) {
1066 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor - too long: %d\N",
1067 descriptor->bLength);
1071 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1072 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor 2nd giving up %lX\n",dev->status);
1075 memcpy((unsigned char *)&hub->desc,buffer,descriptor->bLength);
1076 /* adjust 16bit values */
1077 hub->desc.wHubCharacteristics=swap_16(descriptor->wHubCharacteristics);
1078 /* set the bitmap */
1079 bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
1080 memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by default */
1081 bitmap=(unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1082 memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1083 for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
1084 hub->desc.DeviceRemovable[i]=descriptor->DeviceRemovable[i];
1086 for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
1087 hub->desc.DeviceRemovable[i]=descriptor->PortPowerCtrlMask[i];
1089 dev->maxchild = descriptor->bNbrPorts;
1090 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1092 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1094 USB_HUB_PRINTF("ganged power switching\n");
1097 USB_HUB_PRINTF("individual port power switching\n");
1101 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1105 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1106 USB_HUB_PRINTF("part of a compound device\n");
1108 USB_HUB_PRINTF("standalone hub\n");
1110 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1112 USB_HUB_PRINTF("global over-current protection\n");
1115 USB_HUB_PRINTF("individual port over-current protection\n");
1119 USB_HUB_PRINTF("no over-current protection\n");
1122 USB_HUB_PRINTF("power on to power good time: %dms\n", descriptor->bPwrOn2PwrGood * 2);
1123 USB_HUB_PRINTF("hub controller current requirement: %dmA\n", descriptor->bHubContrCurrent);
1124 for (i = 0; i < dev->maxchild; i++)
1125 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1126 hub->desc.DeviceRemovable[(i + 1)/8] & (1 << ((i + 1)%8)) ? " not" : "");
1127 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1128 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - too long: %d\n",
1129 descriptor->bLength);
1133 if (usb_get_hub_status(dev, buffer) < 0) {
1134 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",dev->status);
1137 hubsts = (struct usb_hub_status *)buffer;
1138 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1139 swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
1140 USB_HUB_PRINTF("local power source is %s\n",
1141 (swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
1142 USB_HUB_PRINTF("%sover-current condition exists\n",
1143 (swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
1144 usb_hub_power_on(hub);
1145 for (i = 0; i < dev->maxchild; i++) {
1146 struct usb_port_status portsts;
1147 unsigned short portstatus, portchange;
1149 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1150 USB_HUB_PRINTF("get_port_status failed\n");
1153 portstatus = swap_16(portsts.wPortStatus);
1154 portchange = swap_16(portsts.wPortChange);
1155 USB_HUB_PRINTF("Port %d Status %X Change %X\n",i+1,portstatus,portchange);
1156 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1157 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1158 usb_hub_port_connect_change(dev, i);
1160 if (portchange & USB_PORT_STAT_C_ENABLE) {
1161 USB_HUB_PRINTF("port %d enable change, status %x\n", i + 1, portstatus);
1162 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
1164 /* EM interference sometimes causes bad shielded USB devices to
1165 * be shutdown by the hub, this hack enables them again.
1166 * Works at least with mouse driver */
1167 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1168 (portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
1169 USB_HUB_PRINTF("already running port %i disabled by hub (EMI?), re-enabling...\n",
1171 usb_hub_port_connect_change(dev, i);
1174 if (portstatus & USB_PORT_STAT_SUSPEND) {
1175 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1176 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND);
1179 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1180 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1181 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
1182 usb_hub_power_on(hub);
1185 if (portchange & USB_PORT_STAT_C_RESET) {
1186 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1187 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
1189 } /* end for i all ports */
1194 int usb_hub_probe(struct usb_device *dev, int ifnum)
1196 struct usb_interface_descriptor *iface;
1197 struct usb_endpoint_descriptor *ep;
1200 iface = &dev->config.if_desc[ifnum];
1202 if (iface->bInterfaceClass != USB_CLASS_HUB)
1204 /* Some hubs have a subclass of 1, which AFAICT according to the */
1205 /* specs is not defined, but it works */
1206 if ((iface->bInterfaceSubClass != 0) &&
1207 (iface->bInterfaceSubClass != 1))
1209 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1210 if (iface->bNumEndpoints != 1)
1212 ep = &iface->ep_desc[0];
1213 /* Output endpoint? Curiousier and curiousier.. */
1214 if (!(ep->bEndpointAddress & USB_DIR_IN))
1216 /* If it's not an interrupt endpoint, we'd better punt! */
1217 if ((ep->bmAttributes & 3) != 3)
1219 /* We found a hub */
1220 USB_HUB_PRINTF("USB hub found\n");
1221 ret=usb_hub_configure(dev);
1225 #endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */