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* Code cleanup:
[u-boot] / common / usb.c
1 /*
2  * (C) Copyright 2001
3  * Denis Peter, MPL AG Switzerland
4  *
5  * Most of this source has been derived from the Linux USB
6  * project.
7  *
8  * See file CREDITS for list of people who contributed to this
9  * project.
10  *
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.
15  *
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.
20  *
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,
24  * MA 02111-1307 USA
25  *
26  */
27
28
29 /*
30  * How it works:
31  *
32  * Since this is a bootloader, the devices will not be automatic
33  * (re)configured on hotplug, but after a restart of the USB the
34  * device should work.
35  *
36  * For each transfer (except "Interrupt") we wait for completion.
37  */
38 #include <common.h>
39 #include <command.h>
40 #include <asm/processor.h>
41
42 #if (CONFIG_COMMANDS & CFG_CMD_USB)
43
44 #include <usb.h>
45 #ifdef CONFIG_4xx
46 #include <405gp_pci.h>
47 #endif
48
49
50 #undef USB_DEBUG
51
52 #ifdef  USB_DEBUG
53 #define USB_PRINTF(fmt,args...) printf (fmt ,##args)
54 #else
55 #define USB_PRINTF(fmt,args...)
56 #endif
57
58 static struct usb_device usb_dev[USB_MAX_DEVICE];
59 static int dev_index;
60 static int running;
61 static int asynch_allowed;
62 static struct devrequest setup_packet;
63
64 /**********************************************************************
65  * some forward declerations...
66  */
67 void usb_scan_devices(void);
68
69 int usb_hub_probe(struct usb_device *dev, int ifnum);
70 void usb_hub_reset(void);
71
72 /***********************************************************************
73  * wait_ms
74  */
75
76 void __inline__ wait_ms(unsigned long ms)
77 {
78         while(ms-->0)
79                 udelay(1000);
80 }
81 /***************************************************************************
82  * Init USB Device
83  */
84
85 int usb_init(void)
86 {
87         int result;
88
89         running=0;
90         dev_index=0;
91         asynch_allowed=1;
92         usb_hub_reset();
93         /* init low_level USB */
94         printf("USB:   ");
95         result = usb_lowlevel_init();
96         /* if lowlevel init is OK, scan the bus for devices i.e. search HUBs and configure them */
97         if(result==0) {
98                 printf("scanning bus for devices... ");
99                 running=1;
100                 usb_scan_devices();
101                 return 0;
102         }
103         else {
104                 printf("Error, couldn't init Lowlevel part\n");
105                 return -1;
106         }
107 }
108
109 /******************************************************************************
110  * Stop USB this stops the LowLevel Part and deregisters USB devices.
111  */
112 int usb_stop(void)
113 {
114         asynch_allowed=1;
115         usb_hub_reset();
116         return usb_lowlevel_stop();
117 }
118
119 /*
120  * disables the asynch behaviour of the control message. This is used for data
121  * transfers that uses the exclusiv access to the control and bulk messages.
122  */
123 void usb_disable_asynch(int disable)
124 {
125         asynch_allowed=!disable;
126 }
127
128
129 /*-------------------------------------------------------------------
130  * Message wrappers.
131  *
132  */
133
134 /*
135  * submits an Interrupt Message
136  */
137 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
138                         void *buffer,int transfer_len, int interval)
139 {
140         return submit_int_msg(dev,pipe,buffer,transfer_len,interval);
141 }
142
143 /*
144  * submits a control message and waits for comletion (at least timeout * 1ms)
145  * If timeout is 0, we don't wait for completion (used as example to set and
146  * clear keyboards LEDs). For data transfers, (storage transfers) we don't
147  * allow control messages with 0 timeout, by previousely resetting the flag
148  * asynch_allowed (usb_disable_asynch(1)).
149  * returns the transfered length if OK or -1 if error. The transfered length
150  * and the current status are stored in the dev->act_len and dev->status.
151  */
152 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
153                         unsigned char request, unsigned char requesttype,
154                         unsigned short value, unsigned short index,
155                         void *data, unsigned short size, int timeout)
156 {
157         if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
158                 return -1;
159         /* set setup command */
160         setup_packet.requesttype = requesttype;
161         setup_packet.request = request;
162         setup_packet.value = swap_16(value);
163         setup_packet.index = swap_16(index);
164         setup_packet.length = swap_16(size);
165         USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue 0x%X index 0x%X length 0x%X\n",
166                 request,requesttype,value,index,size);
167         dev->status=USB_ST_NOT_PROC; /*not yet processed */
168
169         submit_control_msg(dev,pipe,data,size,&setup_packet);
170         if(timeout==0) {
171                 return (int)size;
172         }
173         while(timeout--) {
174                 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
175                         break;
176                 wait_ms(1);
177         }
178         if(dev->status==0)
179                 return dev->act_len;
180         else {
181                 return -1;
182         }
183 }
184
185 /*-------------------------------------------------------------------
186  * submits bulk message, and waits for completion. returns 0 if Ok or
187  * -1 if Error.
188  * synchronous behavior
189  */
190 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
191                         void *data, int len, int *actual_length, int timeout)
192 {
193         if (len < 0)
194                 return -1;
195         dev->status=USB_ST_NOT_PROC; /*not yet processed */
196         submit_bulk_msg(dev,pipe,data,len);
197         while(timeout--) {
198                 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
199                         break;
200                 wait_ms(1);
201         }
202         *actual_length=dev->act_len;
203         if(dev->status==0)
204                 return 0;
205         else
206                 return -1;
207 }
208
209
210 /*-------------------------------------------------------------------
211  * Max Packet stuff
212  */
213
214 /*
215  * returns the max packet size, depending on the pipe direction and
216  * the configurations values
217  */
218 int usb_maxpacket(struct usb_device *dev,unsigned long pipe)
219 {
220         if((pipe & USB_DIR_IN)==0) /* direction is out -> use emaxpacket out */
221                 return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
222         else
223                 return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
224 }
225
226 /*
227  * set the max packed value of all endpoints in the given configuration
228  */
229 int usb_set_maxpacket(struct usb_device *dev)
230 {
231         int i,ii,b;
232         struct usb_endpoint_descriptor *ep;
233
234         for(i=0; i<dev->config.bNumInterfaces;i++) {
235                 for(ii=0; ii<dev->config.if_desc[i].bNumEndpoints; ii++) {
236                         ep=&dev->config.if_desc[i].ep_desc[ii];
237                         b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
238
239                         if((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)==USB_ENDPOINT_XFER_CONTROL) {        /* Control => bidirectional */
240                                 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
241                                 dev->epmaxpacketin [b] = ep->wMaxPacketSize;
242                                 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",b,dev->epmaxpacketin[b]);
243                         }
244                         else {
245                                 if ((ep->bEndpointAddress & 0x80)==0) { /* OUT Endpoint */
246                                         if(ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
247                                                 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
248                                                 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",b,dev->epmaxpacketout[b]);
249                                         }
250                                 }
251                                 else  { /* IN Endpoint */
252                                         if(ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
253                                                 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
254                                                 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",b,dev->epmaxpacketin[b]);
255                                         }
256                                 } /* if out */
257                         } /* if control */
258                 } /* for each endpoint */
259         }
260         return 0;
261 }
262
263 /*******************************************************************************
264  * Parse the config, located in buffer, and fills the dev->config structure.
265  * Note that all little/big endian swapping are done automatically.
266  */
267 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
268 {
269         struct usb_descriptor_header *head;
270         int index,ifno,epno;
271         ifno=-1;
272         epno=-1;
273
274         dev->configno=cfgno;
275         head =(struct usb_descriptor_header *)&buffer[0];
276         if(head->bDescriptorType!=USB_DT_CONFIG) {
277                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
278                 return -1;
279         }
280         memcpy(&dev->config,buffer,buffer[0]);
281         dev->config.wTotalLength=swap_16(dev->config.wTotalLength);
282         dev->config.no_of_if=0;
283
284         index=dev->config.bLength;
285         /* Ok the first entry must be a configuration entry, now process the others */
286         head=(struct usb_descriptor_header *)&buffer[index];
287         while(index+1 < dev->config.wTotalLength) {
288                 switch(head->bDescriptorType) {
289                         case USB_DT_INTERFACE:
290                                 ifno=dev->config.no_of_if;
291                                 dev->config.no_of_if++; /* found an interface desc, increase numbers */
292                                 memcpy(&dev->config.if_desc[ifno],&buffer[index],buffer[index]); /* copy new desc */
293                                 dev->config.if_desc[ifno].no_of_ep=0;
294
295                                 break;
296                         case USB_DT_ENDPOINT:
297                                 epno=dev->config.if_desc[ifno].no_of_ep;
298                                 dev->config.if_desc[ifno].no_of_ep++; /* found an endpoint */
299                                 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],&buffer[index],buffer[index]);
300                                 dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize
301                                         =swap_16(dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
302                                 USB_PRINTF("if %d, ep %d\n",ifno,epno);
303                                 break;
304                         default:
305                                 if(head->bLength==0)
306                                         return 1;
307                                 USB_PRINTF("unknown Description Type : %x\n",head->bDescriptorType);
308                                 {
309                                         int i;
310                                         unsigned char *ch;
311                                         ch=(unsigned char *)head;
312                                         for(i=0;i<head->bLength; i++)
313                                                 USB_PRINTF("%02X ",*ch++);
314                                         USB_PRINTF("\n\n\n");
315                                 }
316                                 break;
317                 }
318                 index+=head->bLength;
319                 head=(struct usb_descriptor_header *)&buffer[index];
320         }
321         return 1;
322 }
323
324 /***********************************************************************
325  * Clears an endpoint
326  * endp: endpoint number in bits 0-3;
327  * direction flag in bit 7 (1 = IN, 0 = OUT)
328  */
329 int usb_clear_halt(struct usb_device *dev, int pipe)
330 {
331         int result;
332         unsigned short status;
333         int endp=usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
334
335         result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
336                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
337
338         /* don't clear if failed */
339         if (result < 0)
340                 return result;
341         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
342                 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RECIP_ENDPOINT, 0, endp,
343                 &status, sizeof(status), USB_CNTL_TIMEOUT * 3);
344         if (result < 0)
345                 return result;
346         USB_PRINTF("usb_clear_halt: status 0x%x\n",status);
347         if (status & 1)
348                 return -1;              /* still halted */
349         usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
350         /* toggle is reset on clear */
351         usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
352         return 0;
353 }
354
355
356 /**********************************************************************
357  * get_descriptor type
358  */
359 int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
360 {
361         int res;
362         res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
363                         USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
364                         (type << 8) + index, 0,
365                         buf, size, USB_CNTL_TIMEOUT);
366         return res;
367 }
368
369 /**********************************************************************
370  * gets configuration cfgno and store it in the buffer
371  */
372 int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno)
373 {
374         int result;
375         unsigned int tmp;
376         struct usb_config_descriptor *config;
377
378
379         config=(struct usb_config_descriptor *)&buffer[0];
380         result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
381         if (result < 8) {
382                 if (result < 0)
383                         printf("unable to get descriptor, error %lX\n",dev->status);
384                 else
385                         printf("config descriptor too short (expected %i, got %i)\n",8,result);
386                 return -1;
387         }
388         tmp=swap_16(config->wTotalLength);
389
390         result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
391         USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",cfgno,result,tmp);
392         return result;
393 }
394
395 /********************************************************************
396  * set address of a device to the value in dev->devnum.
397  * This can only be done by addressing the device via the default address (0)
398  */
399 int usb_set_address(struct usb_device *dev)
400 {
401         int res;
402
403         USB_PRINTF("set address %d\n",dev->devnum);
404         res=usb_control_msg(dev, usb_snddefctrl(dev),
405                 USB_REQ_SET_ADDRESS, 0,
406                 (dev->devnum),0,
407                 NULL,0, USB_CNTL_TIMEOUT);
408         return res;
409 }
410
411 /********************************************************************
412  * set interface number to interface
413  */
414 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
415 {
416         struct usb_interface_descriptor *if_face = NULL;
417         int ret, i;
418
419         for (i=0; i<dev->config.bNumInterfaces; i++) {
420                 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
421                         if_face = &dev->config.if_desc[i];
422                         break;
423                 }
424         }
425         if (!if_face) {
426                 printf("selecting invalid interface %d", interface);
427                 return -1;
428         }
429
430         if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
431             USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
432             interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
433                 return ret;
434
435         if_face->act_altsetting = (unsigned char)alternate;
436         usb_set_maxpacket(dev);
437         return 0;
438 }
439
440 /********************************************************************
441  * set configuration number to configuration
442  */
443 int usb_set_configuration(struct usb_device *dev, int configuration)
444 {
445         int res;
446         USB_PRINTF("set configuration %d\n",configuration);
447         /* set setup command */
448         res=usb_control_msg(dev, usb_sndctrlpipe(dev,0),
449                 USB_REQ_SET_CONFIGURATION, 0,
450                 configuration,0,
451                 NULL,0, USB_CNTL_TIMEOUT);
452         if(res==0) {
453                 dev->toggle[0] = 0;
454                 dev->toggle[1] = 0;
455                 return 0;
456         }
457         else
458                 return -1;
459 }
460
461 /********************************************************************
462  * set protocol to protocol
463  */
464 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
465 {
466         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
467                 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
468                 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
469 }
470
471 /********************************************************************
472  * set idle
473  */
474 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
475 {
476         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
477                 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
478                 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
479 }
480
481 /********************************************************************
482  * get report
483  */
484 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
485 {
486         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
487                 USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
488                 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
489 }
490
491 /********************************************************************
492  * get class descriptor
493  */
494 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
495                 unsigned char type, unsigned char id, void *buf, int size)
496 {
497         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
498                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
499                 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
500 }
501
502 /********************************************************************
503  * get string index in buffer
504  */
505 int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
506 {
507         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
508                 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
509                 (USB_DT_STRING << 8) + index, langid, buf, size, USB_CNTL_TIMEOUT);
510 }
511
512 /********************************************************************
513  * usb_string:
514  * Get string index and translate it to ascii.
515  * returns string length (> 0) or error (< 0)
516  */
517 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
518 {
519
520         unsigned char mybuf[256];
521         unsigned char *tbuf;
522         int err;
523         unsigned int u, idx;
524
525         if (size <= 0 || !buf || !index)
526                 return -1;
527         buf[0] = 0;
528         tbuf=&mybuf[0];
529
530         /* get langid for strings if it's not yet known */
531         if (!dev->have_langid) {
532                 err = usb_get_string(dev, 0, 0, tbuf, 4);
533                 if (err < 0) {
534                         USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
535                         return -1;
536                 } else if (tbuf[0] < 4) {
537                         USB_PRINTF("string descriptor 0 too short\n");
538                         return -1;
539                 } else {
540                         dev->have_langid = -1;
541                         dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
542                                 /* always use the first langid listed */
543                         USB_PRINTF("USB device number %d default language ID 0x%x\n",
544                                 dev->devnum, dev->string_langid);
545                 }
546         }
547         /* Just ask for a maximum length string and then take the length
548          * that was returned. */
549         err = usb_get_string(dev, dev->string_langid, index, tbuf, 4);
550         if (err < 0)
551                 return err;
552         u=tbuf[0];
553         USB_PRINTF("Strn Len %d, index %d\n",u,index);
554         err = usb_get_string(dev, dev->string_langid, index, tbuf, u);
555         if (err < 0)
556                 return err;
557         size--;         /* leave room for trailing NULL char in output buffer */
558         for (idx = 0, u = 2; u < err; u += 2) {
559                 if (idx >= size)
560                         break;
561                 if (tbuf[u+1])                  /* high byte */
562                         buf[idx++] = '?';  /* non-ASCII character */
563                 else
564                         buf[idx++] = tbuf[u];
565         }
566         buf[idx] = 0;
567         err = idx;
568         return err;
569 }
570
571
572 /********************************************************************
573  * USB device handling:
574  * the USB device are static allocated [USB_MAX_DEVICE].
575  */
576
577
578 /* returns a pointer to the device with the index [index].
579  * if the device is not assigned (dev->devnum==-1) returns NULL
580  */
581 struct usb_device * usb_get_dev_index(int index)
582 {
583         if(usb_dev[index].devnum==-1)
584                 return NULL;
585         else
586                 return &usb_dev[index];
587 }
588
589
590 /* returns a pointer of a new device structure or NULL, if
591  * no device struct is available
592  */
593 struct usb_device * usb_alloc_new_device(void)
594 {
595         int i;
596         USB_PRINTF("New Device %d\n",dev_index);
597         if(dev_index==USB_MAX_DEVICE) {
598                 printf("ERROR, to many USB Devices max=%d\n",USB_MAX_DEVICE);
599                 return NULL;
600         }
601         usb_dev[dev_index].devnum=dev_index+1; /* default Address is 0, real addresses start with 1 */
602         usb_dev[dev_index].maxchild=0;
603         for(i=0;i<USB_MAXCHILDREN;i++)
604                 usb_dev[dev_index].children[i]=NULL;
605         usb_dev[dev_index].parent=NULL;
606         dev_index++;
607         return &usb_dev[dev_index-1];
608 }
609
610
611 /*
612  * By the time we get here, the device has gotten a new device ID
613  * and is in the default state. We need to identify the thing and
614  * get the ball rolling..
615  *
616  * Returns 0 for success, != 0 for error.
617  */
618 int usb_new_device(struct usb_device *dev)
619 {
620         int addr, err;
621         int tmp;
622         unsigned char tmpbuf[256];
623
624         dev->descriptor.bMaxPacketSize0 = 8;  /* Start off at 8 bytes  */
625         dev->maxpacketsize = 0;         /* Default to 8 byte max packet size */
626         dev->epmaxpacketin [0] = 8;
627         dev->epmaxpacketout[0] = 8;
628
629         /* We still haven't set the Address yet */
630         addr = dev->devnum;
631         dev->devnum = 0;
632         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
633         if (err < 8) {
634                 printf("\n      USB device not responding, giving up (status=%lX)\n",dev->status);
635                 return 1;
636         }
637         dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
638         dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
639         switch (dev->descriptor.bMaxPacketSize0) {
640                 case 8: dev->maxpacketsize = 0; break;
641                 case 16: dev->maxpacketsize = 1; break;
642                 case 32: dev->maxpacketsize = 2; break;
643                 case 64: dev->maxpacketsize = 3; break;
644         }
645         dev->devnum = addr;
646
647         err = usb_set_address(dev); /* set address */
648
649         if (err < 0) {
650                 printf("\n      USB device not accepting new address (error=%lX)\n", dev->status);
651                 return 1;
652         }
653
654         wait_ms(10);    /* Let the SET_ADDRESS settle */
655
656         tmp = sizeof(dev->descriptor);
657
658         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, sizeof(dev->descriptor));
659         if (err < tmp) {
660                 if (err < 0)
661                         printf("unable to get device descriptor (error=%d)\n",err);
662                 else
663                         printf("USB device descriptor short read (expected %i, got %i)\n",tmp,err);
664                 return 1;
665         }
666         /* correct le values */
667         dev->descriptor.bcdUSB=swap_16(dev->descriptor.bcdUSB);
668         dev->descriptor.idVendor=swap_16(dev->descriptor.idVendor);
669         dev->descriptor.idProduct=swap_16(dev->descriptor.idProduct);
670         dev->descriptor.bcdDevice=swap_16(dev->descriptor.bcdDevice);
671         /* only support for one config for now */
672         usb_get_configuration_no(dev,&tmpbuf[0],0);
673         usb_parse_config(dev,&tmpbuf[0],0);
674         usb_set_maxpacket(dev);
675         /* we set the default configuration here */
676         if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
677                 printf("failed to set default configuration len %d, status %lX\n",dev->act_len,dev->status);
678                 return -1;
679         }
680         USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
681                 dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber);
682         memset(dev->mf, 0, sizeof(dev->mf));
683         memset(dev->prod, 0, sizeof(dev->prod));
684         memset(dev->serial, 0, sizeof(dev->serial));
685         if (dev->descriptor.iManufacturer)
686                 usb_string(dev, dev->descriptor.iManufacturer, dev->mf, sizeof(dev->mf));
687         if (dev->descriptor.iProduct)
688                 usb_string(dev, dev->descriptor.iProduct, dev->prod, sizeof(dev->prod));
689         if (dev->descriptor.iSerialNumber)
690                 usb_string(dev, dev->descriptor.iSerialNumber, dev->serial, sizeof(dev->serial));
691         USB_PRINTF("Manufacturer %s\n", dev->mf);
692         USB_PRINTF("Product      %s\n", dev->prod);
693         USB_PRINTF("SerialNumber %s\n", dev->serial);
694         /* now prode if the device is a hub */
695         usb_hub_probe(dev,0);
696         return 0;
697 }
698
699 /* build device Tree  */
700 void usb_scan_devices(void)
701 {
702         int i;
703         struct usb_device *dev;
704
705         /* first make all devices unknown */
706         for(i=0;i<USB_MAX_DEVICE;i++) {
707                 memset(&usb_dev[i],0,sizeof(struct usb_device));
708                 usb_dev[i].devnum=-1;
709         }
710         dev_index=0;
711         /* device 0 is always present (root hub, so let it analyze) */
712         dev=usb_alloc_new_device();
713         usb_new_device(dev);
714         printf("%d USB Devices found\n",dev_index);
715         /* insert "driver" if possible */
716 #ifdef CONFIG_USB_KEYBOARD
717         drv_usb_kbd_init();
718         USB_PRINTF("scan end\n");
719 #endif
720 }
721
722
723 /****************************************************************************
724  * HUB "Driver"
725  * Probes device for being a hub and configurate it
726  */
727
728 #undef  USB_HUB_DEBUG
729
730 #ifdef  USB_HUB_DEBUG
731 #define USB_HUB_PRINTF(fmt,args...)     printf (fmt ,##args)
732 #else
733 #define USB_HUB_PRINTF(fmt,args...)
734 #endif
735
736
737 static struct usb_hub_device hub_dev[USB_MAX_HUB];
738 static int usb_hub_index;
739
740
741 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
742 {
743         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
744                 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
745                 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
746 }
747
748 int usb_clear_hub_feature(struct usb_device *dev, int feature)
749 {
750         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
751                 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
752 }
753
754 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
755 {
756         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
757                 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
758 }
759
760 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
761 {
762         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
763                 USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
764 }
765
766 int usb_get_hub_status(struct usb_device *dev, void *data)
767 {
768         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
769                         USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
770                         data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
771 }
772
773 int usb_get_port_status(struct usb_device *dev, int port, void *data)
774 {
775         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
776                         USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
777                         data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
778 }
779
780
781 static void usb_hub_power_on(struct usb_hub_device *hub)
782 {
783         int i;
784         struct usb_device *dev;
785
786         dev=hub->pusb_dev;
787         /* Enable power to the ports */
788         USB_HUB_PRINTF("enabling power on all ports\n");
789         for (i = 0; i < dev->maxchild; i++) {
790                 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
791                 USB_HUB_PRINTF("port %d returns %lX\n",i+1,dev->status);
792                 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
793         }
794 }
795
796 void usb_hub_reset(void)
797 {
798         usb_hub_index=0;
799 }
800
801 struct usb_hub_device *usb_hub_allocate(void)
802 {
803         if(usb_hub_index<USB_MAX_HUB) {
804                 return &hub_dev[usb_hub_index++];
805         }
806         printf("ERROR: USB_MAX_HUB (%d) reached\n",USB_MAX_HUB);
807         return NULL;
808 }
809
810 #define MAX_TRIES 5
811
812 void usb_hub_port_connect_change(struct usb_device *dev, int port)
813 {
814         struct usb_device *usb;
815         struct usb_port_status portsts;
816         unsigned short portstatus, portchange;
817         int tries;
818
819         /* Check status */
820         if (usb_get_port_status(dev, port + 1, &portsts)<0) {
821                 USB_HUB_PRINTF("get_port_status failed\n");
822                 return;
823         }
824
825         portstatus = swap_16(portsts.wPortStatus);
826         portchange = swap_16(portsts.wPortChange);
827         USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
828                 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
829
830         /* Clear the connection change status */
831         usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
832
833         /* Disconnect any existing devices under this port */
834         if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
835              (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
836                 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
837                 /* Return now if nothing is connected */
838                 if (!(portstatus & USB_PORT_STAT_CONNECTION))
839                         return;
840         }
841         wait_ms(200);
842
843         /* Reset the port */
844
845         for(tries=0;tries<MAX_TRIES;tries++) {
846
847                 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
848                 wait_ms(200);
849
850                 if (usb_get_port_status(dev, port + 1, &portsts)<0) {
851                         USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
852                         return;
853                 }
854                 portstatus = swap_16(portsts.wPortStatus);
855                 portchange = swap_16(portsts.wPortChange);
856                 USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus ,portchange,
857                         portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
858                 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d  USB_PORT_STAT_ENABLE %d\n",
859                         (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
860                         (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
861                         (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
862                 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
863                     !(portstatus & USB_PORT_STAT_CONNECTION))
864                         return;
865
866                 if (portstatus & USB_PORT_STAT_ENABLE)
867                         break;
868
869                 wait_ms(200);
870         }
871
872         if (tries==MAX_TRIES) {
873                 USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
874                 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
875                 return;
876         }
877
878         usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
879         wait_ms(200);
880
881         /* Allocate a new device struct for it */
882         usb=usb_alloc_new_device();
883         usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
884
885         dev->children[port] = usb;
886         usb->parent=dev;
887         /* Run it through the hoops (find a driver, etc) */
888         if (usb_new_device(usb)) {
889                 /* Woops, disable the port */
890                 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
891                 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
892         }
893 }
894
895
896 int usb_hub_configure(struct usb_device *dev)
897 {
898         unsigned char buffer[256], *bitmap;
899         struct usb_hub_descriptor *descriptor;
900         struct usb_hub_status *hubsts;
901         int i;
902         struct usb_hub_device *hub;
903
904         /* "allocate" Hub device */
905         hub=usb_hub_allocate();
906         if(hub==NULL)
907                 return -1;
908         hub->pusb_dev=dev;
909         /* Get the the hub descriptor */
910         if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
911                 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor, giving up %lX\n",dev->status);
912                 return -1;
913         }
914         descriptor = (struct usb_hub_descriptor *)buffer;
915         if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
916                 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor 2nd giving up %lX\n",dev->status);
917                 return -1;
918         }
919         memcpy((unsigned char *)&hub->desc,buffer,descriptor->bLength);
920         /* adjust 16bit values */
921         hub->desc.wHubCharacteristics=swap_16(descriptor->wHubCharacteristics);
922         /* set the bitmap */
923         bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
924         memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by default */
925         bitmap=(unsigned char *)&hub->desc.PortPowerCtrlMask[0];
926         memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
927         for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
928                 hub->desc.DeviceRemovable[i]=descriptor->DeviceRemovable[i];
929         }
930         for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
931                 hub->desc.DeviceRemovable[i]=descriptor->PortPowerCtrlMask[i];
932         }
933         dev->maxchild = descriptor->bNbrPorts;
934         USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
935
936         switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
937                 case 0x00:
938                         USB_HUB_PRINTF("ganged power switching\n");
939                         break;
940                 case 0x01:
941                         USB_HUB_PRINTF("individual port power switching\n");
942                         break;
943                 case 0x02:
944                 case 0x03:
945                         USB_HUB_PRINTF("unknown reserved power switching mode\n");
946                         break;
947         }
948
949         if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
950                 USB_HUB_PRINTF("part of a compound device\n");
951         else
952                 USB_HUB_PRINTF("standalone hub\n");
953
954         switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
955                 case 0x00:
956                         USB_HUB_PRINTF("global over-current protection\n");
957                         break;
958                 case 0x08:
959                         USB_HUB_PRINTF("individual port over-current protection\n");
960                         break;
961                 case 0x10:
962                 case 0x18:
963                         USB_HUB_PRINTF("no over-current protection\n");
964       break;
965         }
966         USB_HUB_PRINTF("power on to power good time: %dms\n", descriptor->bPwrOn2PwrGood * 2);
967         USB_HUB_PRINTF("hub controller current requirement: %dmA\n", descriptor->bHubContrCurrent);
968         for (i = 0; i < dev->maxchild; i++)
969                 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
970                         hub->desc.DeviceRemovable[(i + 1)/8] & (1 << ((i + 1)%8)) ? " not" : "");
971         if (usb_get_hub_status(dev, buffer) < 0) {
972                 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",dev->status);
973                 return -1;
974         }
975         hubsts = (struct usb_hub_status *)buffer;
976         USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
977                 swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
978         USB_HUB_PRINTF("local power source is %s\n",
979                 (swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
980         USB_HUB_PRINTF("%sover-current condition exists\n",
981                 (swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
982         usb_hub_power_on(hub);
983         for (i = 0; i < dev->maxchild; i++) {
984                 struct usb_port_status portsts;
985                 unsigned short portstatus, portchange;
986
987                 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
988                         USB_HUB_PRINTF("get_port_status failed\n");
989                         continue;
990                 }
991                 portstatus = swap_16(portsts.wPortStatus);
992                 portchange = swap_16(portsts.wPortChange);
993                 USB_HUB_PRINTF("Port %d Status %X Change %X\n",i+1,portstatus,portchange);
994                 if (portchange & USB_PORT_STAT_C_CONNECTION) {
995                         USB_HUB_PRINTF("port %d connection change\n", i + 1);
996                         usb_hub_port_connect_change(dev, i);
997                 }
998                 if (portchange & USB_PORT_STAT_C_ENABLE) {
999                         USB_HUB_PRINTF("port %d enable change, status %x\n", i + 1, portstatus);
1000                         usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
1001
1002                         /* EM interference sometimes causes bad shielded USB devices to
1003                          * be shutdown by the hub, this hack enables them again.
1004                          * Works at least with mouse driver */
1005                         if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1006                                 (portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
1007                                 USB_HUB_PRINTF("already running port %i disabled by hub (EMI?), re-enabling...\n",
1008                                         i + 1);
1009                                         usb_hub_port_connect_change(dev, i);
1010                         }
1011                 }
1012                 if (portstatus & USB_PORT_STAT_SUSPEND) {
1013                         USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1014                         usb_clear_port_feature(dev, i + 1,  USB_PORT_FEAT_SUSPEND);
1015                 }
1016
1017                 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1018                         USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1019                         usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
1020                         usb_hub_power_on(hub);
1021                 }
1022
1023                 if (portchange & USB_PORT_STAT_C_RESET) {
1024                         USB_HUB_PRINTF("port %d reset change\n", i + 1);
1025                         usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
1026                 }
1027         } /* end for i all ports */
1028
1029         return 0;
1030 }
1031
1032 int usb_hub_probe(struct usb_device *dev, int ifnum)
1033 {
1034         struct usb_interface_descriptor *iface;
1035         struct usb_endpoint_descriptor *ep;
1036         int ret;
1037
1038         iface = &dev->config.if_desc[ifnum];
1039         /* Is it a hub? */
1040         if (iface->bInterfaceClass != USB_CLASS_HUB)
1041                 return 0;
1042         /* Some hubs have a subclass of 1, which AFAICT according to the */
1043         /*  specs is not defined, but it works */
1044         if ((iface->bInterfaceSubClass != 0) &&
1045             (iface->bInterfaceSubClass != 1))
1046                 return 0;
1047         /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1048         if (iface->bNumEndpoints != 1)
1049                 return 0;
1050         ep = &iface->ep_desc[0];
1051         /* Output endpoint? Curiousier and curiousier.. */
1052         if (!(ep->bEndpointAddress & USB_DIR_IN))
1053                 return 0;
1054         /* If it's not an interrupt endpoint, we'd better punt! */
1055         if ((ep->bmAttributes & 3) != 3)
1056                 return 0;
1057         /* We found a hub */
1058         USB_HUB_PRINTF("USB hub found\n");
1059         ret=usb_hub_configure(dev);
1060         return ret;
1061 }
1062
1063 #endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */
1064
1065 /* EOF */