3 * Denis Peter, MPL AG Switzerland
5 * Most of this source has been derived from the Linux USB
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 * Since this is a bootloader, the devices will not be automatic
32 * (re)configured on hotplug, but after a restart of the USB the
35 * For each transfer (except "Interrupt") we wait for completion.
39 #include <asm/processor.h>
40 #include <linux/ctype.h>
42 #if (CONFIG_COMMANDS & CFG_CMD_USB)
46 #include <405gp_pci.h>
53 #define USB_PRINTF(fmt,args...) printf (fmt ,##args)
55 #define USB_PRINTF(fmt,args...)
58 #define USB_BUFSIZ 512
60 static struct usb_device usb_dev[USB_MAX_DEVICE];
63 static int asynch_allowed;
64 static struct devrequest setup_packet;
66 /**********************************************************************
67 * some forward declerations...
69 void usb_scan_devices(void);
71 int usb_hub_probe(struct usb_device *dev, int ifnum);
72 void usb_hub_reset(void);
75 /***********************************************************************
79 void __inline__ wait_ms(unsigned long ms)
84 /***************************************************************************
96 /* init low_level USB */
98 result = usb_lowlevel_init();
99 /* if lowlevel init is OK, scan the bus for devices i.e. search HUBs and configure them */
101 printf("scanning bus for devices... ");
107 printf("Error, couldn't init Lowlevel part\n");
112 /******************************************************************************
113 * Stop USB this stops the LowLevel Part and deregisters USB devices.
119 return usb_lowlevel_stop();
123 * disables the asynch behaviour of the control message. This is used for data
124 * transfers that uses the exclusiv access to the control and bulk messages.
126 void usb_disable_asynch(int disable)
128 asynch_allowed=!disable;
132 /*-------------------------------------------------------------------
138 * submits an Interrupt Message
140 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
141 void *buffer,int transfer_len, int interval)
143 return submit_int_msg(dev,pipe,buffer,transfer_len,interval);
147 * submits a control message and waits for comletion (at least timeout * 1ms)
148 * If timeout is 0, we don't wait for completion (used as example to set and
149 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
150 * allow control messages with 0 timeout, by previousely resetting the flag
151 * asynch_allowed (usb_disable_asynch(1)).
152 * returns the transfered length if OK or -1 if error. The transfered length
153 * and the current status are stored in the dev->act_len and dev->status.
155 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
156 unsigned char request, unsigned char requesttype,
157 unsigned short value, unsigned short index,
158 void *data, unsigned short size, int timeout)
160 if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
163 /* set setup command */
164 setup_packet.requesttype = requesttype;
165 setup_packet.request = request;
166 setup_packet.value = swap_16(value);
167 setup_packet.index = swap_16(index);
168 setup_packet.length = swap_16(size);
169 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue 0x%X index 0x%X length 0x%X\n",
170 request,requesttype,value,index,size);
171 dev->status=USB_ST_NOT_PROC; /*not yet processed */
173 submit_control_msg(dev,pipe,data,size,&setup_packet);
178 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
189 /*-------------------------------------------------------------------
190 * submits bulk message, and waits for completion. returns 0 if Ok or
192 * synchronous behavior
194 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
195 void *data, int len, int *actual_length, int timeout)
199 dev->status=USB_ST_NOT_PROC; /*not yet processed */
200 submit_bulk_msg(dev,pipe,data,len);
202 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
206 *actual_length=dev->act_len;
214 /*-------------------------------------------------------------------
219 * returns the max packet size, depending on the pipe direction and
220 * the configurations values
222 int usb_maxpacket(struct usb_device *dev,unsigned long pipe)
224 if((pipe & USB_DIR_IN)==0) /* direction is out -> use emaxpacket out */
225 return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
227 return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
231 * set the max packed value of all endpoints in the given configuration
233 int usb_set_maxpacket(struct usb_device *dev)
236 struct usb_endpoint_descriptor *ep;
238 for(i=0; i<dev->config.bNumInterfaces;i++) {
239 for(ii=0; ii<dev->config.if_desc[i].bNumEndpoints; ii++) {
240 ep=&dev->config.if_desc[i].ep_desc[ii];
241 b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
243 if((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)==USB_ENDPOINT_XFER_CONTROL) { /* Control => bidirectional */
244 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
245 dev->epmaxpacketin [b] = ep->wMaxPacketSize;
246 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",b,dev->epmaxpacketin[b]);
249 if ((ep->bEndpointAddress & 0x80)==0) { /* OUT Endpoint */
250 if(ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
251 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
252 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",b,dev->epmaxpacketout[b]);
255 else { /* IN Endpoint */
256 if(ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
257 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
258 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",b,dev->epmaxpacketin[b]);
262 } /* for each endpoint */
267 /*******************************************************************************
268 * Parse the config, located in buffer, and fills the dev->config structure.
269 * Note that all little/big endian swapping are done automatically.
271 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
273 struct usb_descriptor_header *head;
279 head =(struct usb_descriptor_header *)&buffer[0];
280 if(head->bDescriptorType!=USB_DT_CONFIG) {
281 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
284 memcpy(&dev->config,buffer,buffer[0]);
285 dev->config.wTotalLength=swap_16(dev->config.wTotalLength);
286 dev->config.no_of_if=0;
288 index=dev->config.bLength;
289 /* Ok the first entry must be a configuration entry, now process the others */
290 head=(struct usb_descriptor_header *)&buffer[index];
291 while(index+1 < dev->config.wTotalLength) {
292 switch(head->bDescriptorType) {
293 case USB_DT_INTERFACE:
294 ifno=dev->config.no_of_if;
295 dev->config.no_of_if++; /* found an interface desc, increase numbers */
296 memcpy(&dev->config.if_desc[ifno],&buffer[index],buffer[index]); /* copy new desc */
297 dev->config.if_desc[ifno].no_of_ep=0;
300 case USB_DT_ENDPOINT:
301 epno=dev->config.if_desc[ifno].no_of_ep;
302 dev->config.if_desc[ifno].no_of_ep++; /* found an endpoint */
303 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],&buffer[index],buffer[index]);
304 dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize
305 =swap_16(dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
306 USB_PRINTF("if %d, ep %d\n",ifno,epno);
311 USB_PRINTF("unknown Description Type : %x\n",head->bDescriptorType);
315 ch=(unsigned char *)head;
316 for(i=0;i<head->bLength; i++)
317 USB_PRINTF("%02X ",*ch++);
318 USB_PRINTF("\n\n\n");
322 index+=head->bLength;
323 head=(struct usb_descriptor_header *)&buffer[index];
328 /***********************************************************************
330 * endp: endpoint number in bits 0-3;
331 * direction flag in bit 7 (1 = IN, 0 = OUT)
333 int usb_clear_halt(struct usb_device *dev, int pipe)
336 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
338 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
339 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
341 /* don't clear if failed */
346 * NOTE: we do not get status and verify reset was successful
347 * as some devices are reported to lock up upon this check..
350 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
352 /* toggle is reset on clear */
353 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
358 /**********************************************************************
359 * get_descriptor type
361 int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
364 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
365 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
366 (type << 8) + index, 0,
367 buf, size, USB_CNTL_TIMEOUT);
371 /**********************************************************************
372 * gets configuration cfgno and store it in the buffer
374 int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno)
378 struct usb_config_descriptor *config;
381 config=(struct usb_config_descriptor *)&buffer[0];
382 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
385 printf("unable to get descriptor, error %lX\n",dev->status);
387 printf("config descriptor too short (expected %i, got %i)\n",8,result);
390 tmp=swap_16(config->wTotalLength);
392 if (tmp > USB_BUFSIZ) {
393 USB_PRINTF("usb_get_configuration_no: failed to get descriptor - too long: %d\n",
398 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
399 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",cfgno,result,tmp);
403 /********************************************************************
404 * set address of a device to the value in dev->devnum.
405 * This can only be done by addressing the device via the default address (0)
407 int usb_set_address(struct usb_device *dev)
411 USB_PRINTF("set address %d\n",dev->devnum);
412 res=usb_control_msg(dev, usb_snddefctrl(dev),
413 USB_REQ_SET_ADDRESS, 0,
415 NULL,0, USB_CNTL_TIMEOUT);
419 /********************************************************************
420 * set interface number to interface
422 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
424 struct usb_interface_descriptor *if_face = NULL;
427 for (i = 0; i < dev->config.bNumInterfaces; i++) {
428 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
429 if_face = &dev->config.if_desc[i];
434 printf("selecting invalid interface %d", interface);
438 if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
439 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
440 interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
446 /********************************************************************
447 * set configuration number to configuration
449 int usb_set_configuration(struct usb_device *dev, int configuration)
452 USB_PRINTF("set configuration %d\n",configuration);
453 /* set setup command */
454 res=usb_control_msg(dev, usb_sndctrlpipe(dev,0),
455 USB_REQ_SET_CONFIGURATION, 0,
457 NULL,0, USB_CNTL_TIMEOUT);
467 /********************************************************************
468 * set protocol to protocol
470 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
472 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
473 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
474 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
477 /********************************************************************
480 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
482 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
483 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
484 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
487 /********************************************************************
490 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
492 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
493 USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
494 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
497 /********************************************************************
498 * get class descriptor
500 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
501 unsigned char type, unsigned char id, void *buf, int size)
503 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
504 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
505 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
508 /********************************************************************
509 * get string index in buffer
511 int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
516 for (i = 0; i < 3; ++i) {
517 /* some devices are flaky */
518 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
519 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
520 (USB_DT_STRING << 8) + index, langid, buf, size,
530 static void usb_try_string_workarounds(unsigned char *buf, int *length)
532 int newlength, oldlength = *length;
534 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
535 if (!isprint(buf[newlength]) || buf[newlength + 1])
545 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
546 unsigned int index, unsigned char *buf)
550 /* Try to read the string descriptor by asking for the maximum
551 * possible number of bytes */
552 rc = usb_get_string(dev, langid, index, buf, 255);
554 /* If that failed try to read the descriptor length, then
555 * ask for just that many bytes */
557 rc = usb_get_string(dev, langid, index, buf, 2);
559 rc = usb_get_string(dev, langid, index, buf, buf[0]);
563 if (!buf[0] && !buf[1])
564 usb_try_string_workarounds(buf, &rc);
566 /* There might be extra junk at the end of the descriptor */
570 rc = rc - (rc & 1); /* force a multiple of two */
580 /********************************************************************
582 * Get string index and translate it to ascii.
583 * returns string length (> 0) or error (< 0)
585 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
587 unsigned char mybuf[USB_BUFSIZ];
592 if (size <= 0 || !buf || !index)
597 /* get langid for strings if it's not yet known */
598 if (!dev->have_langid) {
599 err = usb_string_sub(dev, 0, 0, tbuf);
601 USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
603 } else if (tbuf[0] < 4) {
604 USB_PRINTF("string descriptor 0 too short\n");
607 dev->have_langid = -1;
608 dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
609 /* always use the first langid listed */
610 USB_PRINTF("USB device number %d default language ID 0x%x\n",
611 dev->devnum, dev->string_langid);
615 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
619 size--; /* leave room for trailing NULL char in output buffer */
620 for (idx = 0, u = 2; u < err; u += 2) {
623 if (tbuf[u+1]) /* high byte */
624 buf[idx++] = '?'; /* non-ASCII character */
626 buf[idx++] = tbuf[u];
634 /********************************************************************
635 * USB device handling:
636 * the USB device are static allocated [USB_MAX_DEVICE].
640 /* returns a pointer to the device with the index [index].
641 * if the device is not assigned (dev->devnum==-1) returns NULL
643 struct usb_device * usb_get_dev_index(int index)
645 if(usb_dev[index].devnum==-1)
648 return &usb_dev[index];
652 /* returns a pointer of a new device structure or NULL, if
653 * no device struct is available
655 struct usb_device * usb_alloc_new_device(void)
658 USB_PRINTF("New Device %d\n",dev_index);
659 if(dev_index==USB_MAX_DEVICE) {
660 printf("ERROR, too many USB Devices, max=%d\n",USB_MAX_DEVICE);
663 usb_dev[dev_index].devnum=dev_index+1; /* default Address is 0, real addresses start with 1 */
664 usb_dev[dev_index].maxchild=0;
665 for(i=0;i<USB_MAXCHILDREN;i++)
666 usb_dev[dev_index].children[i]=NULL;
667 usb_dev[dev_index].parent=NULL;
669 return &usb_dev[dev_index-1];
674 * By the time we get here, the device has gotten a new device ID
675 * and is in the default state. We need to identify the thing and
676 * get the ball rolling..
678 * Returns 0 for success, != 0 for error.
680 int usb_new_device(struct usb_device *dev)
684 unsigned char tmpbuf[USB_BUFSIZ];
686 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
687 dev->maxpacketsize = 0; /* Default to 8 byte max packet size */
688 dev->epmaxpacketin [0] = 8;
689 dev->epmaxpacketout[0] = 8;
691 /* We still haven't set the Address yet */
697 /* this is a Windows scheme of initialization sequence, with double
698 * reset of the device. Some equipment is said to work only with such
699 * init sequence; this patch is based on the work by Alan Stern:
700 * http://sourceforge.net/mailarchive/forum.php?thread_id=5729457&forum_id=5398
703 struct usb_device_descriptor *desc;
705 struct usb_device *parent = dev->parent;
706 unsigned short portstatus;
708 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
709 * only 18 bytes long, this will terminate with a short packet. But if
710 * the maxpacket size is 8 or 16 the device may be waiting to transmit
713 desc = (struct usb_device_descriptor *)tmpbuf;
714 desc->bMaxPacketSize0 = 0;
715 for (j = 0; j < 3; ++j) {
716 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
718 USB_PRINTF("usb_new_device: 64 byte descr\n");
722 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
724 /* find the port number we're at */
726 for (j = 0; j < parent->maxchild; j++) {
727 if (parent->children[j] == dev) {
733 printf("usb_new_device: cannot locate device's port..\n");
737 /* reset the port for the second time */
738 err = hub_port_reset(dev->parent, port, &portstatus);
740 printf("\n Couldn't reset port %i\n", port);
745 /* and this is the old and known way of initializing devices */
746 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
748 printf("\n USB device not responding, giving up (status=%lX)\n",dev->status);
753 dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
754 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
755 switch (dev->descriptor.bMaxPacketSize0) {
756 case 8: dev->maxpacketsize = 0; break;
757 case 16: dev->maxpacketsize = 1; break;
758 case 32: dev->maxpacketsize = 2; break;
759 case 64: dev->maxpacketsize = 3; break;
763 err = usb_set_address(dev); /* set address */
766 printf("\n USB device not accepting new address (error=%lX)\n", dev->status);
770 wait_ms(10); /* Let the SET_ADDRESS settle */
772 tmp = sizeof(dev->descriptor);
774 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, sizeof(dev->descriptor));
777 printf("unable to get device descriptor (error=%d)\n",err);
779 printf("USB device descriptor short read (expected %i, got %i)\n",tmp,err);
782 /* correct le values */
783 dev->descriptor.bcdUSB=swap_16(dev->descriptor.bcdUSB);
784 dev->descriptor.idVendor=swap_16(dev->descriptor.idVendor);
785 dev->descriptor.idProduct=swap_16(dev->descriptor.idProduct);
786 dev->descriptor.bcdDevice=swap_16(dev->descriptor.bcdDevice);
787 /* only support for one config for now */
788 usb_get_configuration_no(dev,&tmpbuf[0],0);
789 usb_parse_config(dev,&tmpbuf[0],0);
790 usb_set_maxpacket(dev);
791 /* we set the default configuration here */
792 if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
793 printf("failed to set default configuration len %d, status %lX\n",dev->act_len,dev->status);
796 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
797 dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber);
798 memset(dev->mf, 0, sizeof(dev->mf));
799 memset(dev->prod, 0, sizeof(dev->prod));
800 memset(dev->serial, 0, sizeof(dev->serial));
801 if (dev->descriptor.iManufacturer)
802 usb_string(dev, dev->descriptor.iManufacturer, dev->mf, sizeof(dev->mf));
803 if (dev->descriptor.iProduct)
804 usb_string(dev, dev->descriptor.iProduct, dev->prod, sizeof(dev->prod));
805 if (dev->descriptor.iSerialNumber)
806 usb_string(dev, dev->descriptor.iSerialNumber, dev->serial, sizeof(dev->serial));
807 USB_PRINTF("Manufacturer %s\n", dev->mf);
808 USB_PRINTF("Product %s\n", dev->prod);
809 USB_PRINTF("SerialNumber %s\n", dev->serial);
810 /* now prode if the device is a hub */
811 usb_hub_probe(dev,0);
815 /* build device Tree */
816 void usb_scan_devices(void)
819 struct usb_device *dev;
821 /* first make all devices unknown */
822 for(i=0;i<USB_MAX_DEVICE;i++) {
823 memset(&usb_dev[i],0,sizeof(struct usb_device));
824 usb_dev[i].devnum=-1;
827 /* device 0 is always present (root hub, so let it analyze) */
828 dev=usb_alloc_new_device();
830 printf("%d USB Device(s) found\n",dev_index);
831 /* insert "driver" if possible */
832 #ifdef CONFIG_USB_KEYBOARD
834 USB_PRINTF("scan end\n");
839 /****************************************************************************
841 * Probes device for being a hub and configurate it
847 #define USB_HUB_PRINTF(fmt,args...) printf (fmt ,##args)
849 #define USB_HUB_PRINTF(fmt,args...)
853 static struct usb_hub_device hub_dev[USB_MAX_HUB];
854 static int usb_hub_index;
857 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
859 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
860 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
861 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
864 int usb_clear_hub_feature(struct usb_device *dev, int feature)
866 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
867 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
870 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
872 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
873 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
876 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
878 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
879 USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
882 int usb_get_hub_status(struct usb_device *dev, void *data)
884 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
885 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
886 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
889 int usb_get_port_status(struct usb_device *dev, int port, void *data)
891 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
892 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
893 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
897 static void usb_hub_power_on(struct usb_hub_device *hub)
900 struct usb_device *dev;
903 /* Enable power to the ports */
904 USB_HUB_PRINTF("enabling power on all ports\n");
905 for (i = 0; i < dev->maxchild; i++) {
906 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
907 USB_HUB_PRINTF("port %d returns %lX\n",i+1,dev->status);
908 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
912 void usb_hub_reset(void)
917 struct usb_hub_device *usb_hub_allocate(void)
919 if(usb_hub_index<USB_MAX_HUB) {
920 return &hub_dev[usb_hub_index++];
922 printf("ERROR: USB_MAX_HUB (%d) reached\n",USB_MAX_HUB);
928 static int hub_port_reset(struct usb_device *dev, int port,
929 unsigned short *portstat)
932 struct usb_port_status portsts;
933 unsigned short portstatus, portchange;
936 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
937 for(tries=0;tries<MAX_TRIES;tries++) {
939 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
942 if (usb_get_port_status(dev, port + 1, &portsts)<0) {
943 USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
946 portstatus = swap_16(portsts.wPortStatus);
947 portchange = swap_16(portsts.wPortChange);
948 USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus ,portchange,
949 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
950 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d USB_PORT_STAT_ENABLE %d\n",
951 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
952 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
953 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
954 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
955 !(portstatus & USB_PORT_STAT_CONNECTION))
958 if (portstatus & USB_PORT_STAT_ENABLE) {
965 if (tries==MAX_TRIES) {
966 USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
967 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
971 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
972 *portstat = portstatus;
978 void usb_hub_port_connect_change(struct usb_device *dev, int port)
980 struct usb_device *usb;
981 struct usb_port_status portsts;
982 unsigned short portstatus, portchange;
985 if (usb_get_port_status(dev, port + 1, &portsts)<0) {
986 USB_HUB_PRINTF("get_port_status failed\n");
990 portstatus = swap_16(portsts.wPortStatus);
991 portchange = swap_16(portsts.wPortChange);
992 USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
993 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
995 /* Clear the connection change status */
996 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
998 /* Disconnect any existing devices under this port */
999 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
1000 (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
1001 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1002 /* Return now if nothing is connected */
1003 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1008 /* Reset the port */
1009 if (hub_port_reset(dev, port, &portstatus) < 0) {
1010 printf("cannot reset port %i!?\n", port + 1);
1016 /* Allocate a new device struct for it */
1017 usb=usb_alloc_new_device();
1018 usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
1020 dev->children[port] = usb;
1022 /* Run it through the hoops (find a driver, etc) */
1023 if (usb_new_device(usb)) {
1024 /* Woops, disable the port */
1025 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1026 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1031 int usb_hub_configure(struct usb_device *dev)
1033 unsigned char buffer[USB_BUFSIZ], *bitmap;
1034 struct usb_hub_descriptor *descriptor;
1035 struct usb_hub_status *hubsts;
1037 struct usb_hub_device *hub;
1039 /* "allocate" Hub device */
1040 hub=usb_hub_allocate();
1044 /* Get the the hub descriptor */
1045 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
1046 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor, giving up %lX\n",dev->status);
1049 descriptor = (struct usb_hub_descriptor *)buffer;
1051 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1052 i = descriptor->bLength;
1053 if (i > USB_BUFSIZ) {
1054 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor - too long: %d\N",
1055 descriptor->bLength);
1059 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
1060 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor 2nd giving up %lX\n",dev->status);
1063 memcpy((unsigned char *)&hub->desc,buffer,descriptor->bLength);
1064 /* adjust 16bit values */
1065 hub->desc.wHubCharacteristics=swap_16(descriptor->wHubCharacteristics);
1066 /* set the bitmap */
1067 bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
1068 memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by default */
1069 bitmap=(unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1070 memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1071 for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
1072 hub->desc.DeviceRemovable[i]=descriptor->DeviceRemovable[i];
1074 for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
1075 hub->desc.DeviceRemovable[i]=descriptor->PortPowerCtrlMask[i];
1077 dev->maxchild = descriptor->bNbrPorts;
1078 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1080 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
1082 USB_HUB_PRINTF("ganged power switching\n");
1085 USB_HUB_PRINTF("individual port power switching\n");
1089 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1093 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1094 USB_HUB_PRINTF("part of a compound device\n");
1096 USB_HUB_PRINTF("standalone hub\n");
1098 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
1100 USB_HUB_PRINTF("global over-current protection\n");
1103 USB_HUB_PRINTF("individual port over-current protection\n");
1107 USB_HUB_PRINTF("no over-current protection\n");
1110 USB_HUB_PRINTF("power on to power good time: %dms\n", descriptor->bPwrOn2PwrGood * 2);
1111 USB_HUB_PRINTF("hub controller current requirement: %dmA\n", descriptor->bHubContrCurrent);
1112 for (i = 0; i < dev->maxchild; i++)
1113 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
1114 hub->desc.DeviceRemovable[(i + 1)/8] & (1 << ((i + 1)%8)) ? " not" : "");
1115 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
1116 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - too long: %d\n",
1117 descriptor->bLength);
1121 if (usb_get_hub_status(dev, buffer) < 0) {
1122 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",dev->status);
1125 hubsts = (struct usb_hub_status *)buffer;
1126 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
1127 swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
1128 USB_HUB_PRINTF("local power source is %s\n",
1129 (swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
1130 USB_HUB_PRINTF("%sover-current condition exists\n",
1131 (swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
1132 usb_hub_power_on(hub);
1133 for (i = 0; i < dev->maxchild; i++) {
1134 struct usb_port_status portsts;
1135 unsigned short portstatus, portchange;
1137 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1138 USB_HUB_PRINTF("get_port_status failed\n");
1141 portstatus = swap_16(portsts.wPortStatus);
1142 portchange = swap_16(portsts.wPortChange);
1143 USB_HUB_PRINTF("Port %d Status %X Change %X\n",i+1,portstatus,portchange);
1144 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1145 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1146 usb_hub_port_connect_change(dev, i);
1148 if (portchange & USB_PORT_STAT_C_ENABLE) {
1149 USB_HUB_PRINTF("port %d enable change, status %x\n", i + 1, portstatus);
1150 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
1152 /* EM interference sometimes causes bad shielded USB devices to
1153 * be shutdown by the hub, this hack enables them again.
1154 * Works at least with mouse driver */
1155 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1156 (portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
1157 USB_HUB_PRINTF("already running port %i disabled by hub (EMI?), re-enabling...\n",
1159 usb_hub_port_connect_change(dev, i);
1162 if (portstatus & USB_PORT_STAT_SUSPEND) {
1163 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1164 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND);
1167 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1168 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1169 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
1170 usb_hub_power_on(hub);
1173 if (portchange & USB_PORT_STAT_C_RESET) {
1174 USB_HUB_PRINTF("port %d reset change\n", i + 1);
1175 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
1177 } /* end for i all ports */
1182 int usb_hub_probe(struct usb_device *dev, int ifnum)
1184 struct usb_interface_descriptor *iface;
1185 struct usb_endpoint_descriptor *ep;
1188 iface = &dev->config.if_desc[ifnum];
1190 if (iface->bInterfaceClass != USB_CLASS_HUB)
1192 /* Some hubs have a subclass of 1, which AFAICT according to the */
1193 /* specs is not defined, but it works */
1194 if ((iface->bInterfaceSubClass != 0) &&
1195 (iface->bInterfaceSubClass != 1))
1197 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1198 if (iface->bNumEndpoints != 1)
1200 ep = &iface->ep_desc[0];
1201 /* Output endpoint? Curiousier and curiousier.. */
1202 if (!(ep->bEndpointAddress & USB_DIR_IN))
1204 /* If it's not an interrupt endpoint, we'd better punt! */
1205 if ((ep->bmAttributes & 3) != 3)
1207 /* We found a hub */
1208 USB_HUB_PRINTF("USB hub found\n");
1209 ret=usb_hub_configure(dev);
1213 #endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */