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
  51 #undef USB_DEBUG
  52
  53 #ifdef  USB_DEBUG
  54 #define USB_PRINTF(fmt,args...) printf (fmt ,##args)
  55 #else
  56 #define USB_PRINTF(fmt,args...)
  57 #endif
  58
  59 static struct usb_device usb_dev[USB_MAX_DEVICE];
  60 static int dev_index;
  61 static int running;
  62 static int asynch_allowed;
  63 static struct devrequest setup_packet;
  64
  65 /**********************************************************************
  66  * some forward declerations...
  67  */
  68 void usb_scan_devices(void);
  69
  70 int usb_hub_probe(struct usb_device *dev, int ifnum);
  71 void usb_hub_reset(void);
  72
  73 /***********************************************************************
  74  * wait_ms
  75  */
  76
  77 void __inline__ wait_ms(unsigned long ms)
  78 {
  79         while(ms-->0)
  80                 udelay(1000);
  81 }
  82 /***************************************************************************
  83  * Init USB Device
  84  */
  85
  86 int usb_init(void)
  87 {
  88         int result;
  89
  90         running=0;
  91         dev_index=0;
  92         asynch_allowed=1;
  93         usb_hub_reset();
  94         /* init low_level USB */
  95         printf("USB:   ");
  96         result = usb_lowlevel_init();
  97         /* if lowlevel init is OK, scan the bus for devices i.e. search HUBs and configure them */
  98         if(result==0) {
  99                 printf("scanning bus for devices... ");
 100                 running=1;
 101                 usb_scan_devices();
 102                 return 0;
 103         }
 104         else {
 105                 printf("Error, couldn't init Lowlevel part\n");
 106                 return -1;
 107         }
 108 }
 109
 110 /******************************************************************************
 111  * Stop USB this stops the LowLevel Part and deregisters USB devices.
 112  */
 113 int usb_stop(void)
 114 {
 115         asynch_allowed=1;
 116         usb_hub_reset();
 117         return usb_lowlevel_stop();
 118 }
 119
 120 /*
 121  * disables the asynch behaviour of the control message. This is used for data
 122  * transfers that uses the exclusiv access to the control and bulk messages.
 123  */
 124 void usb_disable_asynch(int disable)
 125 {
 126         asynch_allowed=!disable;
 127 }
 128
 129
 130 /*-------------------------------------------------------------------
 131  * Message wrappers.
 132  *
 133  */
 134
 135 /*
 136  * submits an Interrupt Message
 137  */
 138 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 139                         void *buffer,int transfer_len, int interval)
 140 {
 141         return submit_int_msg(dev,pipe,buffer,transfer_len,interval);
 142 }
 143
 144 /*
 145  * submits a control message and waits for comletion (at least timeout * 1ms)
 146  * If timeout is 0, we don't wait for completion (used as example to set and
 147  * clear keyboards LEDs). For data transfers, (storage transfers) we don't
 148  * allow control messages with 0 timeout, by previousely resetting the flag
 149  * asynch_allowed (usb_disable_asynch(1)).
 150  * returns the transfered length if OK or -1 if error. The transfered length
 151  * and the current status are stored in the dev->act_len and dev->status.
 152  */
 153 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 154                         unsigned char request, unsigned char requesttype,
 155                         unsigned short value, unsigned short index,
 156                         void *data, unsigned short size, int timeout)
 157 {
 158         if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
 159                 return -1;
 160         /* set setup command */
 161         setup_packet.requesttype = requesttype;
 162         setup_packet.request = request;
 163         setup_packet.value = swap_16(value);
 164         setup_packet.index = swap_16(index);
 165         setup_packet.length = swap_16(size);
 166         USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue 0x%X index 0x%X length 0x%X\n",
 167                 request,requesttype,value,index,size);
 168         dev->status=USB_ST_NOT_PROC; /*not yet processed */
 169
 170         submit_control_msg(dev,pipe,data,size,&setup_packet);
 171         if(timeout==0) {
 172                 return (int)size;
 173         }
 174         while(timeout--) {
 175                 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
 176                         break;
 177                 wait_ms(1);
 178         }
 179         if(dev->status==0)
 180                 return dev->act_len;
 181         else {
 182                 return -1;
 183         }
 184 }
 185
 186 /*-------------------------------------------------------------------
 187  * submits bulk message, and waits for completion. returns 0 if Ok or
 188  * -1 if Error.
 189  * synchronous behavior
 190  */
 191 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 192                         void *data, int len, int *actual_length, int timeout)
 193 {
 194         if (len < 0)
 195                 return -1;
 196         dev->status=USB_ST_NOT_PROC; /*not yet processed */
 197         submit_bulk_msg(dev,pipe,data,len);
 198         while(timeout--) {
 199                 if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
 200                         break;
 201                 wait_ms(1);
 202         }
 203         *actual_length=dev->act_len;
 204         if(dev->status==0)
 205                 return 0;
 206         else
 207                 return -1;
 208 }
 209
 210
 211 /*-------------------------------------------------------------------
 212  * Max Packet stuff
 213  */
 214
 215 /*
 216  * returns the max packet size, depending on the pipe direction and
 217  * the configurations values
 218  */
 219 int usb_maxpacket(struct usb_device *dev,unsigned long pipe)
 220 {
 221         if((pipe & USB_DIR_IN)==0) /* direction is out -> use emaxpacket out */
 222                 return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
 223         else
 224                 return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
 225 }
 226
 227 /*
 228  * set the max packed value of all endpoints in the given configuration
 229  */
 230 int usb_set_maxpacket(struct usb_device *dev)
 231 {
 232         int i,ii,b;
 233         struct usb_endpoint_descriptor *ep;
 234
 235         for(i=0; i<dev->config.bNumInterfaces;i++) {
 236                 for(ii=0; ii<dev->config.if_desc[i].bNumEndpoints; ii++) {
 237                         ep=&dev->config.if_desc[i].ep_desc[ii];
 238                         b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 239
 240                         if((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)==USB_ENDPOINT_XFER_CONTROL) {        /* Control => bidirectional */
 241                                 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
 242                                 dev->epmaxpacketin [b] = ep->wMaxPacketSize;
 243                                 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",b,dev->epmaxpacketin[b]);
 244                         }
 245                         else {
 246                                 if ((ep->bEndpointAddress & 0x80)==0) { /* OUT Endpoint */
 247                                         if(ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
 248                                                 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
 249                                                 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",b,dev->epmaxpacketout[b]);
 250                                         }
 251                                 }
 252                                 else  { /* IN Endpoint */
 253                                         if(ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
 254                                                 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
 255                                                 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",b,dev->epmaxpacketin[b]);
 256                                         }
 257                                 } /* if out */
 258                         } /* if control */
 259                 } /* for each endpoint */
 260         }
 261         return 0;
 262 }
 263
 264 /*******************************************************************************
 265  * Parse the config, located in buffer, and fills the dev->config structure.
 266  * Note that all little/big endian swapping are done automatically.
 267  */
 268 int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
 269 {
 270         struct usb_descriptor_header *head;
 271         int index,ifno,epno;
 272         ifno=-1;
 273         epno=-1;
 274
 275         dev->configno=cfgno;
 276         head =(struct usb_descriptor_header *)&buffer[0];
 277         if(head->bDescriptorType!=USB_DT_CONFIG) {
 278                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
 279                 return -1;
 280         }
 281         memcpy(&dev->config,buffer,buffer[0]);
 282         dev->config.wTotalLength=swap_16(dev->config.wTotalLength);
 283         dev->config.no_of_if=0;
 284
 285         index=dev->config.bLength;
 286         /* Ok the first entry must be a configuration entry, now process the others */
 287         head=(struct usb_descriptor_header *)&buffer[index];
 288         while(index+1 < dev->config.wTotalLength) {
 289                 switch(head->bDescriptorType) {
 290                         case USB_DT_INTERFACE:
 291                                 ifno=dev->config.no_of_if;
 292                                 dev->config.no_of_if++; /* found an interface desc, increase numbers */
 293                                 memcpy(&dev->config.if_desc[ifno],&buffer[index],buffer[index]); /* copy new desc */
 294                                 dev->config.if_desc[ifno].no_of_ep=0;
 295
 296                                 break;
 297                         case USB_DT_ENDPOINT:
 298                                 epno=dev->config.if_desc[ifno].no_of_ep;
 299                                 dev->config.if_desc[ifno].no_of_ep++; /* found an endpoint */
 300                                 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],&buffer[index],buffer[index]);
 301                                 dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize
 302                                         =swap_16(dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
 303                                 USB_PRINTF("if %d, ep %d\n",ifno,epno);
 304                                 break;
 305                         default:
 306                                 if(head->bLength==0)
 307                                         return 1;
 308                                 USB_PRINTF("unknown Description Type : %x\n",head->bDescriptorType);
 309                                 {
 310                                         int i;
 311                                         unsigned char *ch;
 312                                         ch=(unsigned char *)head;
 313                                         for(i=0;i<head->bLength; i++)
 314                                                 USB_PRINTF("%02X ",*ch++);
 315                                         USB_PRINTF("\n\n\n");
 316                                 }
 317                                 break;
 318                 }
 319                 index+=head->bLength;
 320                 head=(struct usb_descriptor_header *)&buffer[index];
 321         }
 322         return 1;
 323 }
 324
 325 /***********************************************************************
 326  * Clears an endpoint
 327  * endp: endpoint number in bits 0-3;
 328  * direction flag in bit 7 (1 = IN, 0 = OUT)
 329  */
 330 int usb_clear_halt(struct usb_device *dev, int pipe)
 331 {
 332         int result;
 333         unsigned short status;
 334         int endp=usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
 335
 336         result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 337                 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
 338
 339         /* don't clear if failed */
 340         if (result < 0)
 341                 return result;
 342         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 343                 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RECIP_ENDPOINT, 0, endp,
 344                 &status, sizeof(status), USB_CNTL_TIMEOUT * 3);
 345         if (result < 0)
 346                 return result;
 347         USB_PRINTF("usb_clear_halt: status 0x%x\n",status);
 348         if (status & 1)
 349                 return -1;              /* still halted */
 350         usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 351         /* toggle is reset on clear */
 352         usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
 353         return 0;
 354 }
 355
 356
 357 /**********************************************************************
 358  * get_descriptor type
 359  */
 360 int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
 361 {
 362         int res;
 363         res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 364                         USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
 365                         (type << 8) + index, 0,
 366                         buf, size, USB_CNTL_TIMEOUT);
 367         return res;
 368 }
 369
 370 /**********************************************************************
 371  * gets configuration cfgno and store it in the buffer
 372  */
 373 int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno)
 374 {
 375         int result;
 376         unsigned int tmp;
 377         struct usb_config_descriptor *config;
 378
 379
 380         config=(struct usb_config_descriptor *)&buffer[0];
 381         result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
 382         if (result < 8) {
 383                 if (result < 0)
 384                         printf("unable to get descriptor, error %lX\n",dev->status);
 385                 else
 386                         printf("config descriptor too short (expected %i, got %i)\n",8,result);
 387                 return -1;
 388         }
 389         tmp=swap_16(config->wTotalLength);
 390
 391         result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
 392         USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",cfgno,result,tmp);
 393         return result;
 394 }
 395
 396 /********************************************************************
 397  * set address of a device to the value in dev->devnum.
 398  * This can only be done by addressing the device via the default address (0)
 399  */
 400 int usb_set_address(struct usb_device *dev)
 401 {
 402         int res;
 403
 404         USB_PRINTF("set address %d\n",dev->devnum);
 405         res=usb_control_msg(dev, usb_snddefctrl(dev),
 406                 USB_REQ_SET_ADDRESS, 0,
 407                 (dev->devnum),0,
 408                 NULL,0, USB_CNTL_TIMEOUT);
 409         return res;
 410 }
 411
 412 /********************************************************************
 413  * set interface number to interface
 414  */
 415 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 416 {
 417         struct usb_interface_descriptor *if_face = NULL;
 418         int ret, i;
 419
 420         for (i=0; i<dev->config.bNumInterfaces; i++) {
 421                 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
 422                         if_face = &dev->config.if_desc[i];
 423                         break;
 424                 }
 425         }
 426         if (!if_face) {
 427                 printf("selecting invalid interface %d", interface);
 428                 return -1;
 429         }
 430
 431         if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 432             USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
 433             interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
 434                 return ret;
 435
 436         if_face->act_altsetting = (unsigned char)alternate;
 437         usb_set_maxpacket(dev);
 438         return 0;
 439 }
 440
 441 /********************************************************************
 442  * set configuration number to configuration
 443  */
 444 int usb_set_configuration(struct usb_device *dev, int configuration)
 445 {
 446         int res;
 447         USB_PRINTF("set configuration %d\n",configuration);
 448         /* set setup command */
 449         res=usb_control_msg(dev, usb_sndctrlpipe(dev,0),
 450                 USB_REQ_SET_CONFIGURATION, 0,
 451                 configuration,0,
 452                 NULL,0, USB_CNTL_TIMEOUT);
 453         if(res==0) {
 454                 dev->toggle[0] = 0;
 455                 dev->toggle[1] = 0;
 456                 return 0;
 457         }
 458         else
 459                 return -1;
 460 }
 461
 462 /********************************************************************
 463  * set protocol to protocol
 464  */
 465 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
 466 {
 467         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 468                 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 469                 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
 470 }
 471
 472 /********************************************************************
 473  * set idle
 474  */
 475 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
 476 {
 477         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 478                 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 479                 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
 480 }
 481
 482 /********************************************************************
 483  * get report
 484  */
 485 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
 486 {
 487         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 488                 USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 489                 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
 490 }
 491
 492 /********************************************************************
 493  * get class descriptor
 494  */
 495 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 496                 unsigned char type, unsigned char id, void *buf, int size)
 497 {
 498         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 499                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
 500                 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
 501 }
 502
 503 /********************************************************************
 504  * get string index in buffer
 505  */
 506 int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
 507 {
 508         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 509                 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
 510                 (USB_DT_STRING << 8) + index, langid, buf, size, USB_CNTL_TIMEOUT);
 511 }
 512
 513 /********************************************************************
 514  * usb_string:
 515  * Get string index and translate it to ascii.
 516  * returns string length (> 0) or error (< 0)
 517  */
 518 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
 519 {
 520
 521         unsigned char mybuf[256];
 522         unsigned char *tbuf;
 523         int err;
 524         unsigned int u, idx;
 525
 526         if (size <= 0 || !buf || !index)
 527                 return -1;
 528         buf[0] = 0;
 529         tbuf=&mybuf[0];
 530
 531         /* get langid for strings if it's not yet known */
 532         if (!dev->have_langid) {
 533                 err = usb_get_string(dev, 0, 0, tbuf, 4);
 534                 if (err < 0) {
 535                         USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
 536                         return -1;
 537                 } else if (tbuf[0] < 4) {
 538                         USB_PRINTF("string descriptor 0 too short\n");
 539                         return -1;
 540                 } else {
 541                         dev->have_langid = -1;
 542                         dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
 543                                 /* always use the first langid listed */
 544                         USB_PRINTF("USB device number %d default language ID 0x%x\n",
 545                                 dev->devnum, dev->string_langid);
 546                 }
 547         }
 548         /* Just ask for a maximum length string and then take the length
 549          * that was returned. */
 550         err = usb_get_string(dev, dev->string_langid, index, tbuf, 4);
 551         if (err < 0)
 552                 return err;
 553         u=tbuf[0];
 554         USB_PRINTF("Strn Len %d, index %d\n",u,index);
 555         err = usb_get_string(dev, dev->string_langid, index, tbuf, u);
 556         if (err < 0)
 557                 return err;
 558         size--;         /* leave room for trailing NULL char in output buffer */
 559         for (idx = 0, u = 2; u < err; u += 2) {
 560                 if (idx >= size)
 561                         break;
 562                 if (tbuf[u+1])                  /* high byte */
 563                         buf[idx++] = '?';  /* non-ASCII character */
 564                 else
 565                         buf[idx++] = tbuf[u];
 566         }
 567         buf[idx] = 0;
 568         err = idx;
 569         return err;
 570 }
 571
 572
 573 /********************************************************************
 574  * USB device handling:
 575  * the USB device are static allocated [USB_MAX_DEVICE].
 576  */
 577
 578
 579 /* returns a pointer to the device with the index [index].
 580  * if the device is not assigned (dev->devnum==-1) returns NULL
 581  */
 582 struct usb_device * usb_get_dev_index(int index)
 583 {
 584         if(usb_dev[index].devnum==-1)
 585                 return NULL;
 586         else
 587                 return &usb_dev[index];
 588 }
 589
 590
 591 /* returns a pointer of a new device structure or NULL, if
 592  * no device struct is available
 593  */
 594 struct usb_device * usb_alloc_new_device(void)
 595 {
 596         int i;
 597         USB_PRINTF("New Device %d\n",dev_index);
 598         if(dev_index==USB_MAX_DEVICE) {
 599                 printf("ERROR, to many USB Devices max=%d\n",USB_MAX_DEVICE);
 600                 return NULL;
 601         }
 602         usb_dev[dev_index].devnum=dev_index+1; /* default Address is 0, real addresses start with 1 */
 603         usb_dev[dev_index].maxchild=0;
 604         for(i=0;i<USB_MAXCHILDREN;i++)
 605                 usb_dev[dev_index].children[i]=NULL;
 606         usb_dev[dev_index].parent=NULL;
 607         dev_index++;
 608         return &usb_dev[dev_index-1];
 609 }
 610
 611
 612 /*
 613  * By the time we get here, the device has gotten a new device ID
 614  * and is in the default state. We need to identify the thing and
 615  * get the ball rolling..
 616  *
 617  * Returns 0 for success, != 0 for error.
 618  */
 619 int usb_new_device(struct usb_device *dev)
 620 {
 621         int addr, err;
 622         int tmp;
 623         unsigned char tmpbuf[256];
 624
 625         dev->descriptor.bMaxPacketSize0 = 8;  /* Start off at 8 bytes  */
 626         dev->maxpacketsize = 0;         /* Default to 8 byte max packet size */
 627         dev->epmaxpacketin [0] = 8;
 628         dev->epmaxpacketout[0] = 8;
 629
 630         /* We still haven't set the Address yet */
 631         addr = dev->devnum;
 632         dev->devnum = 0;
 633         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
 634         if (err < 8) {
 635                 printf("\n      USB device not responding, giving up (status=%lX)\n",dev->status);
 636                 return 1;
 637         }
 638         dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
 639         dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
 640         switch (dev->descriptor.bMaxPacketSize0) {
 641                 case 8: dev->maxpacketsize = 0; break;
 642                 case 16: dev->maxpacketsize = 1; break;
 643                 case 32: dev->maxpacketsize = 2; break;
 644                 case 64: dev->maxpacketsize = 3; break;
 645         }
 646         dev->devnum = addr;
 647
 648         err = usb_set_address(dev); /* set address */
 649
 650         if (err < 0) {
 651                 printf("\n      USB device not accepting new address (error=%lX)\n", dev->status);
 652                 return 1;
 653         }
 654
 655         wait_ms(10);    /* Let the SET_ADDRESS settle */
 656
 657         tmp = sizeof(dev->descriptor);
 658
 659         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, sizeof(dev->descriptor));
 660         if (err < tmp) {
 661                 if (err < 0)
 662                         printf("unable to get device descriptor (error=%d)\n",err);
 663                 else
 664                         printf("USB device descriptor short read (expected %i, got %i)\n",tmp,err);
 665                 return 1;
 666         }
 667         /* correct le values */
 668         dev->descriptor.bcdUSB=swap_16(dev->descriptor.bcdUSB);
 669         dev->descriptor.idVendor=swap_16(dev->descriptor.idVendor);
 670         dev->descriptor.idProduct=swap_16(dev->descriptor.idProduct);
 671         dev->descriptor.bcdDevice=swap_16(dev->descriptor.bcdDevice);
 672         /* only support for one config for now */
 673         usb_get_configuration_no(dev,&tmpbuf[0],0);
 674         usb_parse_config(dev,&tmpbuf[0],0);
 675         usb_set_maxpacket(dev);
 676         /* we set the default configuration here */
 677         if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
 678                 printf("failed to set default configuration len %d, status %lX\n",dev->act_len,dev->status);
 679                 return -1;
 680         }
 681         USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
 682                 dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber);
 683         memset(dev->mf, 0, sizeof(dev->mf));
 684         memset(dev->prod, 0, sizeof(dev->prod));
 685         memset(dev->serial, 0, sizeof(dev->serial));
 686         if (dev->descriptor.iManufacturer)
 687                 usb_string(dev, dev->descriptor.iManufacturer, dev->mf, sizeof(dev->mf));
 688         if (dev->descriptor.iProduct)
 689                 usb_string(dev, dev->descriptor.iProduct, dev->prod, sizeof(dev->prod));
 690         if (dev->descriptor.iSerialNumber)
 691                 usb_string(dev, dev->descriptor.iSerialNumber, dev->serial, sizeof(dev->serial));
 692         USB_PRINTF("Manufacturer %s\n", dev->mf);
 693         USB_PRINTF("Product      %s\n", dev->prod);
 694         USB_PRINTF("SerialNumber %s\n", dev->serial);
 695         /* now prode if the device is a hub */
 696         usb_hub_probe(dev,0);
 697         return 0;
 698 }
 699
 700 /* build device Tree  */
 701 void usb_scan_devices(void)
 702 {
 703         int i;
 704         struct usb_device *dev;
 705
 706         /* first make all devices unknown */
 707         for(i=0;i<USB_MAX_DEVICE;i++) {
 708                 memset(&usb_dev[i],0,sizeof(struct usb_device));
 709                 usb_dev[i].devnum=-1;
 710         }
 711         dev_index=0;
 712         /* device 0 is always present (root hub, so let it analyze) */
 713         dev=usb_alloc_new_device();
 714         usb_new_device(dev);
 715         printf("%d USB Devices found\n",dev_index);
 716         /* insert "driver" if possible */
 717 #ifdef CONFIG_USB_KEYBOARD
 718         drv_usb_kbd_init();
 719         USB_PRINTF("scan end\n");
 720 #endif
 721 }
 722
 723
 724 /****************************************************************************
 725  * HUB "Driver"
 726  * Probes device for being a hub and configurate it
 727  */
 728
 729 #undef  USB_HUB_DEBUG
 730
 731 #ifdef  USB_HUB_DEBUG
 732 #define USB_HUB_PRINTF(fmt,args...)     printf (fmt ,##args)
 733 #else
 734 #define USB_HUB_PRINTF(fmt,args...)
 735 #endif
 736
 737
 738 static struct usb_hub_device hub_dev[USB_MAX_HUB];
 739 static int usb_hub_index;
 740
 741
 742 int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
 743 {
 744         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 745                 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
 746                 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
 747 }
 748
 749 int usb_clear_hub_feature(struct usb_device *dev, int feature)
 750 {
 751         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 752                 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
 753 }
 754
 755 int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
 756 {
 757         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 758                 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
 759 }
 760
 761 int usb_set_port_feature(struct usb_device *dev, int port, int feature)
 762 {
 763         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 764                 USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
 765 }
 766
 767 int usb_get_hub_status(struct usb_device *dev, void *data)
 768 {
 769         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 770                         USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
 771                         data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
 772 }
 773
 774 int usb_get_port_status(struct usb_device *dev, int port, void *data)
 775 {
 776         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 777                         USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
 778                         data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
 779 }
 780
 781
 782 static void usb_hub_power_on(struct usb_hub_device *hub)
 783 {
 784         int i;
 785         struct usb_device *dev;
 786
 787         dev=hub->pusb_dev;
 788         /* Enable power to the ports */
 789         USB_HUB_PRINTF("enabling power on all ports\n");
 790         for (i = 0; i < dev->maxchild; i++) {
 791                 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
 792                 USB_HUB_PRINTF("port %d returns %lX\n",i+1,dev->status);
 793                 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
 794         }
 795 }
 796
 797 void usb_hub_reset(void)
 798 {
 799         usb_hub_index=0;
 800 }
 801
 802 struct usb_hub_device *usb_hub_allocate(void)
 803 {
 804         if(usb_hub_index<USB_MAX_HUB) {
 805                 return &hub_dev[usb_hub_index++];
 806         }
 807         printf("ERROR: USB_MAX_HUB (%d) reached\n",USB_MAX_HUB);
 808         return NULL;
 809 }
 810
 811 #define MAX_TRIES 5
 812
 813 void usb_hub_port_connect_change(struct usb_device *dev, int port)
 814 {
 815         struct usb_device *usb;
 816         struct usb_port_status portsts;
 817         unsigned short portstatus, portchange;
 818         int tries;
 819
 820         /* Check status */
 821         if (usb_get_port_status(dev, port + 1, &portsts)<0) {
 822                 USB_HUB_PRINTF("get_port_status failed\n");
 823                 return;
 824         }
 825
 826         portstatus = swap_16(portsts.wPortStatus);
 827         portchange = swap_16(portsts.wPortChange);
 828         USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
 829                 portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
 830
 831         /* Clear the connection change status */
 832         usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
 833
 834         /* Disconnect any existing devices under this port */
 835         if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
 836              (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
 837                 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
 838                 /* Return now if nothing is connected */
 839                 if (!(portstatus & USB_PORT_STAT_CONNECTION))
 840                         return;
 841         }
 842         wait_ms(200);
 843
 844         /* Reset the port */
 845
 846         for(tries=0;tries<MAX_TRIES;tries++) {
 847
 848                 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
 849                 wait_ms(200);
 850
 851                 if (usb_get_port_status(dev, port + 1, &portsts)<0) {
 852                         USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
 853                         return;
 854                 }
 855                 portstatus = swap_16(portsts.wPortStatus);
 856                 portchange = swap_16(portsts.wPortChange);
 857                 USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus ,portchange,
 858                         portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
 859                 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d  USB_PORT_STAT_ENABLE %d\n",
 860                         (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
 861                         (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
 862                         (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
 863                 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
 864                     !(portstatus & USB_PORT_STAT_CONNECTION))
 865                         return;
 866
 867                 if (portstatus & USB_PORT_STAT_ENABLE)
 868                         break;
 869
 870                 wait_ms(200);
 871         }
 872
 873         if (tries==MAX_TRIES) {
 874                 USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
 875                 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
 876                 return;
 877         }
 878
 879         usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
 880         wait_ms(200);
 881
 882         /* Allocate a new device struct for it */
 883         usb=usb_alloc_new_device();
 884         usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
 885
 886         dev->children[port] = usb;
 887         usb->parent=dev;
 888         /* Run it through the hoops (find a driver, etc) */
 889         if (usb_new_device(usb)) {
 890                 /* Woops, disable the port */
 891                 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
 892                 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
 893         }
 894 }
 895
 896
 897 int usb_hub_configure(struct usb_device *dev)
 898 {
 899         unsigned char buffer[256], *bitmap;
 900         struct usb_hub_descriptor *descriptor;
 901         struct usb_hub_status *hubsts;
 902         int i;
 903         struct usb_hub_device *hub;
 904
 905         /* "allocate" Hub device */
 906         hub=usb_hub_allocate();
 907         if(hub==NULL)
 908                 return -1;
 909         hub->pusb_dev=dev;
 910         /* Get the the hub descriptor */
 911         if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
 912                 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor, giving up %lX\n",dev->status);
 913                 return -1;
 914         }
 915         descriptor = (struct usb_hub_descriptor *)buffer;
 916         if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
 917                 USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor 2nd giving up %lX\n",dev->status);
 918                 return -1;
 919         }
 920         memcpy((unsigned char *)&hub->desc,buffer,descriptor->bLength);
 921         /* adjust 16bit values */
 922         hub->desc.wHubCharacteristics=swap_16(descriptor->wHubCharacteristics);
 923         /* set the bitmap */
 924         bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
 925         memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by default */
 926         bitmap=(unsigned char *)&hub->desc.PortPowerCtrlMask[0];
 927         memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
 928         for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
 929                 hub->desc.DeviceRemovable[i]=descriptor->DeviceRemovable[i];
 930         }
 931         for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
 932                 hub->desc.DeviceRemovable[i]=descriptor->PortPowerCtrlMask[i];
 933         }
 934         dev->maxchild = descriptor->bNbrPorts;
 935         USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
 936
 937         switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
 938                 case 0x00:
 939                         USB_HUB_PRINTF("ganged power switching\n");
 940                         break;
 941                 case 0x01:
 942                         USB_HUB_PRINTF("individual port power switching\n");
 943                         break;
 944                 case 0x02:
 945                 case 0x03:
 946                         USB_HUB_PRINTF("unknown reserved power switching mode\n");
 947                         break;
 948         }
 949
 950         if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
 951                 USB_HUB_PRINTF("part of a compound device\n");
 952         else
 953                 USB_HUB_PRINTF("standalone hub\n");
 954
 955         switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
 956                 case 0x00:
 957                         USB_HUB_PRINTF("global over-current protection\n");
 958                         break;
 959                 case 0x08:
 960                         USB_HUB_PRINTF("individual port over-current protection\n");
 961                         break;
 962                 case 0x10:
 963                 case 0x18:
 964                         USB_HUB_PRINTF("no over-current protection\n");
 965       break;
 966         }
 967         USB_HUB_PRINTF("power on to power good time: %dms\n", descriptor->bPwrOn2PwrGood * 2);
 968         USB_HUB_PRINTF("hub controller current requirement: %dmA\n", descriptor->bHubContrCurrent);
 969         for (i = 0; i < dev->maxchild; i++)
 970                 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
 971                         hub->desc.DeviceRemovable[(i + 1)/8] & (1 << ((i + 1)%8)) ? " not" : "");
 972         if (usb_get_hub_status(dev, buffer) < 0) {
 973                 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",dev->status);
 974                 return -1;
 975         }
 976         hubsts = (struct usb_hub_status *)buffer;
 977         USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
 978                 swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
 979         USB_HUB_PRINTF("local power source is %s\n",
 980                 (swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
 981         USB_HUB_PRINTF("%sover-current condition exists\n",
 982                 (swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
 983         usb_hub_power_on(hub);
 984         for (i = 0; i < dev->maxchild; i++) {
 985                 struct usb_port_status portsts;
 986                 unsigned short portstatus, portchange;
 987
 988                 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
 989                         USB_HUB_PRINTF("get_port_status failed\n");
 990                         continue;
 991                 }
 992                 portstatus = swap_16(portsts.wPortStatus);
 993                 portchange = swap_16(portsts.wPortChange);
 994                 USB_HUB_PRINTF("Port %d Status %X Change %X\n",i+1,portstatus,portchange);
 995                 if (portchange & USB_PORT_STAT_C_CONNECTION) {
 996                         USB_HUB_PRINTF("port %d connection change\n", i + 1);
 997                         usb_hub_port_connect_change(dev, i);
 998                 }
 999                 if (portchange & USB_PORT_STAT_C_ENABLE) {
1000                         USB_HUB_PRINTF("port %d enable change, status %x\n", i + 1, portstatus);
1001                         usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
1002
1003                         /* EM interference sometimes causes bad shielded USB devices to
1004                          * be shutdown by the hub, this hack enables them again.
1005                          * Works at least with mouse driver */
1006                         if (!(portstatus & USB_PORT_STAT_ENABLE) &&
1007                                 (portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
1008                                 USB_HUB_PRINTF("already running port %i disabled by hub (EMI?), re-enabling...\n",
1009                                         i + 1);
1010                                         usb_hub_port_connect_change(dev, i);
1011                         }
1012                 }
1013                 if (portstatus & USB_PORT_STAT_SUSPEND) {
1014                         USB_HUB_PRINTF("port %d suspend change\n", i + 1);
1015                         usb_clear_port_feature(dev, i + 1,  USB_PORT_FEAT_SUSPEND);
1016                 }
1017
1018                 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1019                         USB_HUB_PRINTF("port %d over-current change\n", i + 1);
1020                         usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
1021                         usb_hub_power_on(hub);
1022                 }
1023
1024                 if (portchange & USB_PORT_STAT_C_RESET) {
1025                         USB_HUB_PRINTF("port %d reset change\n", i + 1);
1026                         usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
1027                 }
1028         } /* end for i all ports */
1029
1030         return 0;
1031 }
1032
1033 int usb_hub_probe(struct usb_device *dev, int ifnum)
1034 {
1035         struct usb_interface_descriptor *iface;
1036         struct usb_endpoint_descriptor *ep;
1037         int ret;
1038
1039         iface = &dev->config.if_desc[ifnum];
1040         /* Is it a hub? */
1041         if (iface->bInterfaceClass != USB_CLASS_HUB)
1042                 return 0;
1043         /* Some hubs have a subclass of 1, which AFAICT according to the */
1044         /*  specs is not defined, but it works */
1045         if ((iface->bInterfaceSubClass != 0) &&
1046             (iface->bInterfaceSubClass != 1))
1047                 return 0;
1048         /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1049         if (iface->bNumEndpoints != 1)
1050                 return 0;
1051         ep = &iface->ep_desc[0];
1052         /* Output endpoint? Curiousier and curiousier.. */
1053         if (!(ep->bEndpointAddress & USB_DIR_IN))
1054                 return 0;
1055         /* If it's not an interrupt endpoint, we'd better punt! */
1056         if ((ep->bmAttributes & 3) != 3)
1057                 return 0;
1058         /* We found a hub */
1059         USB_HUB_PRINTF("USB hub found\n");
1060         ret=usb_hub_configure(dev);
1061         return ret;
1062 }
1063
1064 #endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */
1065
1066 /* EOF */