common/usb_kbd.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * Part 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 #include <common.h>
  28 #include <devices.h>
  29
  30 #ifdef CONFIG_USB_KEYBOARD
  31
  32 #include <usb.h>
  33
  34 #undef USB_KBD_DEBUG
  35 /*
  36  * if overwrite_console returns 1, the stdin, stderr and stdout
  37  * are switched to the serial port, else the settings in the
  38  * environment are used
  39  */
  40 #ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
  41 extern int overwrite_console (void);
  42 #else
  43 int overwrite_console (void)
  44 {
  45         return (0);
  46 }
  47 #endif
  48
  49 #ifdef  USB_KBD_DEBUG
  50 #define USB_KBD_PRINTF(fmt,args...)     printf (fmt ,##args)
  51 #else
  52 #define USB_KBD_PRINTF(fmt,args...)
  53 #endif
  54
  55
  56 #define REPEAT_RATE  40/4 /* 40msec -> 25cps */
  57 #define REPEAT_DELAY 10 /* 10 x REAPEAT_RATE = 400msec */
  58
  59 #define NUM_LOCK        0x53
  60 #define CAPS_LOCK 0x39
  61 #define SCROLL_LOCK 0x47
  62
  63
  64 /* Modifier bits */
  65 #define LEFT_CNTR               0
  66 #define LEFT_SHIFT      1
  67 #define LEFT_ALT                2
  68 #define LEFT_GUI                3
  69 #define RIGHT_CNTR      4
  70 #define RIGHT_SHIFT     5
  71 #define RIGHT_ALT               6
  72 #define RIGHT_GUI               7
  73
  74 #define USB_KBD_BUFFER_LEN 0x20  /* size of the keyboardbuffer */
  75
  76 static volatile char usb_kbd_buffer[USB_KBD_BUFFER_LEN];
  77 static volatile int usb_in_pointer = 0;
  78 static volatile int usb_out_pointer = 0;
  79
  80 unsigned char new[8];
  81 unsigned char old[8];
  82 int repeat_delay;
  83 #define DEVNAME "usbkbd"
  84 static unsigned char num_lock = 0;
  85 static unsigned char caps_lock = 0;
  86 static unsigned char scroll_lock = 0;
  87 static unsigned char ctrl = 0;
  88
  89 static unsigned char leds __attribute__ ((aligned (0x4)));
  90
  91 static unsigned char usb_kbd_numkey[] = {
  92          '1', '2', '3', '4', '5', '6', '7', '8', '9', '0','\r',0x1b,'\b','\t',' ', '-',
  93          '=', '[', ']','\\', '#', ';', '\'', '`', ',', '.', '/'
  94 };
  95 static unsigned char usb_kbd_numkey_shifted[] = {
  96          '!', '@', '#', '$', '%', '^', '&', '*', '(', ')','\r',0x1b,'\b','\t',' ', '_',
  97          '+', '{', '}', '|', '~', ':', '"', '~', '<', '>', '?'
  98 };
  99
 100 /******************************************************************
 101  * Queue handling
 102  ******************************************************************/
 103 /* puts character in the queue and sets up the in and out pointer */
 104 static void usb_kbd_put_queue(char data)
 105 {
 106         if((usb_in_pointer+1)==USB_KBD_BUFFER_LEN) {
 107                 if(usb_out_pointer==0) {
 108                         return; /* buffer full */
 109                 } else{
 110                         usb_in_pointer=0;
 111                 }
 112         } else {
 113                 if((usb_in_pointer+1)==usb_out_pointer)
 114                         return; /* buffer full */
 115                 usb_in_pointer++;
 116         }
 117         usb_kbd_buffer[usb_in_pointer]=data;
 118         return;
 119 }
 120
 121 /* test if a character is in the queue */
 122 static int usb_kbd_testc(void)
 123 {
 124 #ifdef CFG_USB_EVENT_POLL
 125         usb_event_poll();
 126 #endif
 127         if(usb_in_pointer==usb_out_pointer)
 128                 return(0); /* no data */
 129         else
 130                 return(1);
 131 }
 132 /* gets the character from the queue */
 133 static int usb_kbd_getc(void)
 134 {
 135         char c;
 136         while(usb_in_pointer==usb_out_pointer) {
 137 #ifdef CFG_USB_EVENT_POLL
 138                 usb_event_poll();
 139 #endif
 140         }
 141         if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN)
 142                 usb_out_pointer=0;
 143         else
 144                 usb_out_pointer++;
 145         c=usb_kbd_buffer[usb_out_pointer];
 146         return (int)c;
 147
 148 }
 149
 150 /* forward decleration */
 151 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum);
 152
 153 /* search for keyboard and register it if found */
 154 int drv_usb_kbd_init(void)
 155 {
 156         int error,i,index;
 157         device_t usb_kbd_dev,*old_dev;
 158         struct usb_device *dev;
 159         char *stdinname  = getenv ("stdin");
 160
 161         usb_in_pointer=0;
 162         usb_out_pointer=0;
 163         /* scan all USB Devices */
 164         for(i=0;i<USB_MAX_DEVICE;i++) {
 165                 dev=usb_get_dev_index(i); /* get device */
 166                 if(dev->devnum!=-1) {
 167                         if(usb_kbd_probe(dev,0)==1) { /* Ok, we found a keyboard */
 168                                 /* check, if it is already registered */
 169                                 USB_KBD_PRINTF("USB KBD found set up device.\n");
 170                                 for (index=1; index<=ListNumItems(devlist); index++) {
 171                                         old_dev = ListGetPtrToItem(devlist, index);
 172                                         if(strcmp(old_dev->name,DEVNAME)==0) {
 173                                                 /* ok, already registered, just return ok */
 174                                                 USB_KBD_PRINTF("USB KBD is already registered.\n");
 175                                                 return 1;
 176                                         }
 177                                 }
 178                                 /* register the keyboard */
 179                                 USB_KBD_PRINTF("USB KBD register.\n");
 180                                 memset (&usb_kbd_dev, 0, sizeof(device_t));
 181                                 strcpy(usb_kbd_dev.name, DEVNAME);
 182                                 usb_kbd_dev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
 183                                 usb_kbd_dev.putc = NULL;
 184                                 usb_kbd_dev.puts = NULL;
 185                                 usb_kbd_dev.getc = usb_kbd_getc;
 186                                 usb_kbd_dev.tstc = usb_kbd_testc;
 187                                 error = device_register (&usb_kbd_dev);
 188                                 if(error==0) {
 189                                         /* check if this is the standard input device */
 190                                         if(strcmp(stdinname,DEVNAME)==0) {
 191                                                 /* reassign the console */
 192                                                 if(overwrite_console()) {
 193                                                         return 1;
 194                                                 }
 195                                                 error=console_assign(stdin,DEVNAME);
 196                                                 if(error==0)
 197                                                         return 1;
 198                                                 else
 199                                                         return error;
 200                                         }
 201                                         return 1;
 202                                 }
 203                                 return error;
 204                         }
 205                 }
 206         }
 207         /* no USB Keyboard found */
 208         return -1;
 209 }
 210
 211
 212 /* deregistering the keyboard */
 213 int usb_kbd_deregister(void)
 214 {
 215         return device_deregister(DEVNAME);
 216 }
 217
 218 /**************************************************************************
 219  * Low Level drivers
 220  */
 221
 222 /* set the LEDs. Since this is used in the irq routine, the control job
 223    is issued with a timeout of 0. This means, that the job is queued without
 224    waiting for job completion */
 225
 226 static void usb_kbd_setled(struct usb_device *dev)
 227 {
 228         struct usb_interface_descriptor *iface;
 229         iface = &dev->config.if_desc[0];
 230         leds=0;
 231         if(scroll_lock!=0)
 232                 leds|=1;
 233         leds<<=1;
 234         if(caps_lock!=0)
 235                 leds|=1;
 236         leds<<=1;
 237         if(num_lock!=0)
 238                 leds|=1;
 239         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 240                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 241                 0x200, iface->bInterfaceNumber,(void *)&leds, 1, 0);
 242
 243 }
 244
 245
 246 #define CAPITAL_MASK 0x20
 247 /* Translate the scancode in ASCII */
 248 static int usb_kbd_translate(unsigned char scancode,unsigned char modifier,int pressed)
 249 {
 250         unsigned char keycode;
 251
 252         if(pressed==0) {
 253                 /* key released */
 254                 repeat_delay=0;
 255                 return 0;
 256         }
 257         if(pressed==2) {
 258                 repeat_delay++;
 259                 if(repeat_delay<REPEAT_DELAY)
 260                         return 0;
 261                 repeat_delay=REPEAT_DELAY;
 262         }
 263         keycode=0;
 264         if((scancode>3) && (scancode<=0x1d)) { /* alpha numeric values */
 265                 keycode=scancode-4 + 0x61;
 266                 if(caps_lock)
 267                         keycode&=~CAPITAL_MASK; /* switch to capital Letters */
 268                 if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0)) {
 269                         if(keycode & CAPITAL_MASK)
 270                                 keycode&=~CAPITAL_MASK; /* switch to capital Letters */
 271                         else
 272                                 keycode|=CAPITAL_MASK; /* switch to non capital Letters */
 273                 }
 274         }
 275         if((scancode>0x1d) && (scancode<0x3A)) {
 276                 if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0))  /* shifted */
 277                         keycode=usb_kbd_numkey_shifted[scancode-0x1e];
 278                 else /* non shifted */
 279                         keycode=usb_kbd_numkey[scancode-0x1e];
 280         }
 281
 282         if (ctrl)
 283                 keycode = scancode - 0x3;
 284
 285         if(pressed==1) {
 286                 if(scancode==NUM_LOCK) {
 287                         num_lock=~num_lock;
 288                         return 1;
 289                 }
 290                 if(scancode==CAPS_LOCK) {
 291                         caps_lock=~caps_lock;
 292                         return 1;
 293                 }
 294                 if(scancode==SCROLL_LOCK) {
 295                         scroll_lock=~scroll_lock;
 296                         return 1;
 297                 }
 298         }
 299         if(keycode!=0) {
 300                 USB_KBD_PRINTF("%c",keycode);
 301                 usb_kbd_put_queue(keycode);
 302         }
 303         return 0;
 304 }
 305
 306 /* Interrupt service routine */
 307 static int usb_kbd_irq(struct usb_device *dev)
 308 {
 309         int i,res;
 310
 311         if((dev->irq_status!=0)||(dev->irq_act_len!=8))
 312         {
 313                 USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",dev->irq_status,dev->irq_act_len);
 314                 return 1;
 315         }
 316         res=0;
 317
 318         switch (new[0]) {
 319         case 0x0:       /* No combo key pressed */
 320                 ctrl = 0;
 321                 break;
 322         case 0x01:      /* Left Ctrl pressed */
 323         case 0x10:      /* Right Ctrl pressed */
 324                 ctrl = 1;
 325                 break;
 326         }
 327
 328         for (i = 2; i < 8; i++) {
 329                 if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8]) {
 330                         res|=usb_kbd_translate(old[i],new[0],0);
 331                 }
 332                 if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8]) {
 333                         res|=usb_kbd_translate(new[i],new[0],1);
 334                 }
 335         }
 336         if((new[2]>3) && (old[2]==new[2])) /* still pressed */
 337                 res|=usb_kbd_translate(new[2],new[0],2);
 338         if(res==1)
 339                 usb_kbd_setled(dev);
 340         memcpy(&old[0],&new[0], 8);
 341         return 1; /* install IRQ Handler again */
 342 }
 343
 344 /* probes the USB device dev for keyboard type */
 345 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 346 {
 347         struct usb_interface_descriptor *iface;
 348         struct usb_endpoint_descriptor *ep;
 349         int pipe,maxp;
 350
 351         if (dev->descriptor.bNumConfigurations != 1) return 0;
 352         iface = &dev->config.if_desc[ifnum];
 353
 354         if (iface->bInterfaceClass != 3) return 0;
 355         if (iface->bInterfaceSubClass != 1) return 0;
 356         if (iface->bInterfaceProtocol != 1) return 0;
 357         if (iface->bNumEndpoints != 1) return 0;
 358
 359         ep = &iface->ep_desc[0];
 360
 361         if (!(ep->bEndpointAddress & 0x80)) return 0;
 362         if ((ep->bmAttributes & 3) != 3) return 0;
 363         USB_KBD_PRINTF("USB KBD found set protocol...\n");
 364         /* ok, we found a USB Keyboard, install it */
 365         /* usb_kbd_get_hid_desc(dev); */
 366         usb_set_protocol(dev, iface->bInterfaceNumber, 0);
 367         USB_KBD_PRINTF("USB KBD found set idle...\n");
 368         usb_set_idle(dev, iface->bInterfaceNumber, REPEAT_RATE, 0);
 369         memset(&new[0], 0, 8);
 370         memset(&old[0], 0, 8);
 371         repeat_delay=0;
 372         pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 373         maxp = usb_maxpacket(dev, pipe);
 374         dev->irq_handle=usb_kbd_irq;
 375         USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
 376         usb_submit_int_msg(dev,pipe,&new[0], maxp > 8 ? 8 : maxp,ep->bInterval);
 377         return 1;
 378 }
 379
 380
 381 #if 0
 382 struct usb_hid_descriptor {
 383         unsigned char  bLength;
 384         unsigned char  bDescriptorType; /* 0x21 for HID */
 385         unsigned short bcdHID; /* release number */
 386         unsigned char  bCountryCode;
 387         unsigned char  bNumDescriptors;
 388         unsigned char  bReportDescriptorType;
 389         unsigned short wDescriptorLength;
 390 } __attribute__ ((packed));
 391
 392 /*
 393  * We parse each description item into this structure. Short items data
 394  * values are expanded to 32-bit signed int, long items contain a pointer
 395  * into the data area.
 396  */
 397
 398 struct hid_item {
 399         unsigned char format;
 400         unsigned char size;
 401         unsigned char type;
 402         unsigned char tag;
 403         union {
 404             unsigned char   u8;
 405             char            s8;
 406             unsigned short  u16;
 407             short           s16;
 408             unsigned long   u32;
 409             long            s32;
 410             unsigned char  *longdata;
 411         } data;
 412 };
 413
 414 /*
 415  * HID report item format
 416  */
 417
 418 #define HID_ITEM_FORMAT_SHORT   0
 419 #define HID_ITEM_FORMAT_LONG    1
 420
 421 /*
 422  * Special tag indicating long items
 423  */
 424
 425 #define HID_ITEM_TAG_LONG       15
 426
 427
 428 static struct usb_hid_descriptor usb_kbd_hid_desc;
 429
 430 void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
 431 {
 432         printf("USB_HID_DESC:\n");
 433         printf("  bLenght               0x%x\n",hid->bLength);
 434         printf("  bcdHID                0x%x\n",hid->bcdHID);
 435         printf("  bCountryCode          %d\n",hid->bCountryCode);
 436         printf("  bNumDescriptors       0x%x\n",hid->bNumDescriptors);
 437         printf("  bReportDescriptorType 0x%x\n",hid->bReportDescriptorType);
 438         printf("  wDescriptorLength     0x%x\n",hid->wDescriptorLength);
 439 }
 440
 441
 442 /*
 443  * Fetch a report description item from the data stream. We support long
 444  * items, though they are not used yet.
 445  */
 446
 447 static int fetch_item(unsigned char *start,unsigned char *end, struct hid_item *item)
 448 {
 449         if((end - start) > 0) {
 450                 unsigned char b = *start++;
 451                 item->type = (b >> 2) & 3;
 452                 item->tag  = (b >> 4) & 15;
 453                 if (item->tag == HID_ITEM_TAG_LONG) {
 454                         item->format = HID_ITEM_FORMAT_LONG;
 455                         if ((end - start) >= 2) {
 456                                 item->size = *start++;
 457                                 item->tag  = *start++;
 458                                 if ((end - start) >= item->size) {
 459                                         item->data.longdata = start;
 460                                         start += item->size;
 461                                         return item->size;
 462                                 }
 463                         }
 464                 } else {
 465                         item->format = HID_ITEM_FORMAT_SHORT;
 466                         item->size = b & 3;
 467                         switch (item->size) {
 468                                 case 0:
 469                                         return item->size;
 470                                 case 1:
 471                                         if ((end - start) >= 1) {
 472                                                 item->data.u8 = *start++;
 473                                                 return item->size;
 474                                         }
 475                                         break;
 476                                 case 2:
 477                                         if ((end - start) >= 2) {
 478                                                 item->data.u16 = swap_16((unsigned short *)start);
 479                                                 start+=2;
 480                                                 return item->size;
 481                                         }
 482                                 case 3:
 483                                         item->size++;
 484                                         if ((end - start) >= 4) {
 485                                                 item->data.u32 = swap_32((unsigned long *)start);
 486                                                 start+=4;
 487                                                 return item->size;
 488                                         }
 489                         }
 490                 }
 491         }
 492         return -1;
 493 }
 494
 495 /*
 496  * HID report descriptor item type (prefix bit 2,3)
 497  */
 498
 499 #define HID_ITEM_TYPE_MAIN              0
 500 #define HID_ITEM_TYPE_GLOBAL            1
 501 #define HID_ITEM_TYPE_LOCAL             2
 502 #define HID_ITEM_TYPE_RESERVED          3
 503 /*
 504  * HID report descriptor main item tags
 505  */
 506
 507 #define HID_MAIN_ITEM_TAG_INPUT                 8
 508 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 509 #define HID_MAIN_ITEM_TAG_FEATURE               11
 510 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 511 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 512 /*
 513  * HID report descriptor main item contents
 514  */
 515
 516 #define HID_MAIN_ITEM_CONSTANT          0x001
 517 #define HID_MAIN_ITEM_VARIABLE          0x002
 518 #define HID_MAIN_ITEM_RELATIVE          0x004
 519 #define HID_MAIN_ITEM_WRAP              0x008
 520 #define HID_MAIN_ITEM_NONLINEAR         0x010
 521 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 522 #define HID_MAIN_ITEM_NULL_STATE        0x040
 523 #define HID_MAIN_ITEM_VOLATILE          0x080
 524 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 525
 526 /*
 527  * HID report descriptor collection item types
 528  */
 529
 530 #define HID_COLLECTION_PHYSICAL         0
 531 #define HID_COLLECTION_APPLICATION      1
 532 #define HID_COLLECTION_LOGICAL          2
 533 /*
 534  * HID report descriptor global item tags
 535  */
 536
 537 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 538 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 539 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 540 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 541 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 542 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 543 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 544 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 545 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 546 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 547 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 548 #define HID_GLOBAL_ITEM_TAG_POP                 11
 549
 550 /*
 551  * HID report descriptor local item tags
 552  */
 553
 554 #define HID_LOCAL_ITEM_TAG_USAGE                0
 555 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 556 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 557 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 558 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 559 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 560 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 561 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 562 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 563 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 564
 565
 566 static void usb_kbd_show_item(struct hid_item *item)
 567 {
 568         switch(item->type) {
 569                 case HID_ITEM_TYPE_MAIN:
 570                         switch(item->tag) {
 571                                 case HID_MAIN_ITEM_TAG_INPUT:
 572                                         printf("Main Input");
 573                                         break;
 574                                 case HID_MAIN_ITEM_TAG_OUTPUT:
 575                                         printf("Main Output");
 576                                         break;
 577                                 case HID_MAIN_ITEM_TAG_FEATURE:
 578                                         printf("Main Feature");
 579                                         break;
 580                                 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 581                                         printf("Main Begin Collection");
 582                                         break;
 583                                 case HID_MAIN_ITEM_TAG_END_COLLECTION:
 584                                         printf("Main End Collection");
 585                                         break;
 586                                 default:
 587                                         printf("Main reserved %d",item->tag);
 588                                         break;
 589                         }
 590                         break;
 591                 case HID_ITEM_TYPE_GLOBAL:
 592                         switch(item->tag) {
 593                                 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 594                                         printf("- Global Usage Page");
 595                                         break;
 596                                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 597                                         printf("- Global Logical Minimum");
 598                                         break;
 599                                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 600                                         printf("- Global Logical Maximum");
 601                                         break;
 602                                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 603                                         printf("- Global physical Minimum");
 604                                         break;
 605                                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 606                                         printf("- Global physical Maximum");
 607                                         break;
 608                                 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 609                                         printf("- Global Unit Exponent");
 610                                         break;
 611                                 case HID_GLOBAL_ITEM_TAG_UNIT:
 612                                         printf("- Global Unit");
 613                                         break;
 614                                 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 615                                         printf("- Global Report Size");
 616                                         break;
 617                                 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 618                                         printf("- Global Report ID");
 619                                         break;
 620                                 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 621                                         printf("- Global Report Count");
 622                                         break;
 623                                 case HID_GLOBAL_ITEM_TAG_PUSH:
 624                                         printf("- Global Push");
 625                                         break;
 626                                 case HID_GLOBAL_ITEM_TAG_POP:
 627                                         printf("- Global Pop");
 628                                         break;
 629                                 default:
 630                                         printf("- Global reserved %d",item->tag);
 631                                         break;
 632                         }
 633                         break;
 634                 case HID_ITEM_TYPE_LOCAL:
 635                         switch(item->tag) {
 636                                 case HID_LOCAL_ITEM_TAG_USAGE:
 637                                         printf("-- Local Usage");
 638                                         break;
 639                                 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 640                                         printf("-- Local Usage Minimum");
 641                                         break;
 642                                 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 643                                         printf("-- Local Usage Maximum");
 644                                         break;
 645                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
 646                                         printf("-- Local Designator Index");
 647                                         break;
 648                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
 649                                         printf("-- Local Designator Minimum");
 650                                         break;
 651                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
 652                                         printf("-- Local Designator Maximum");
 653                                         break;
 654                                 case HID_LOCAL_ITEM_TAG_STRING_INDEX:
 655                                         printf("-- Local String Index");
 656                                         break;
 657                                 case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
 658                                         printf("-- Local String Minimum");
 659                                         break;
 660                                 case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
 661                                         printf("-- Local String Maximum");
 662                                         break;
 663                                 case HID_LOCAL_ITEM_TAG_DELIMITER:
 664                                         printf("-- Local Delimiter");
 665                                         break;
 666                                 default:
 667                                         printf("-- Local reserved %d",item->tag);
 668                                         break;
 669                         }
 670                         break;
 671                 default:
 672                         printf("--- reserved %d",item->type);
 673                         break;
 674         }
 675         switch(item->size) {
 676                 case 1:
 677                         printf("  %d",item->data.u8);
 678                         break;
 679                 case 2:
 680                         printf("  %d",item->data.u16);
 681                         break;
 682                 case 4:
 683                         printf("  %ld",item->data.u32);
 684                         break;
 685         }
 686         printf("\n");
 687 }
 688
 689
 690 static int usb_kbd_get_hid_desc(struct usb_device *dev)
 691 {
 692         unsigned char buffer[256];
 693         struct usb_descriptor_header *head;
 694         struct usb_config_descriptor *config;
 695         int index,len,i;
 696         unsigned char *start, *end;
 697         struct hid_item item;
 698
 699         if(usb_get_configuration_no(dev,&buffer[0],0)==-1)
 700                 return -1;
 701         head =(struct usb_descriptor_header *)&buffer[0];
 702         if(head->bDescriptorType!=USB_DT_CONFIG) {
 703                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
 704                 return -1;
 705         }
 706         index=head->bLength;
 707         config=(struct usb_config_descriptor *)&buffer[0];
 708         len=swap_16(config->wTotalLength);
 709         /* Ok the first entry must be a configuration entry, now process the others */
 710         head=(struct usb_descriptor_header *)&buffer[index];
 711         while(index+1 < len) {
 712                 if(head->bDescriptorType==USB_DT_HID) {
 713                         printf("HID desc found\n");
 714                         memcpy(&usb_kbd_hid_desc,&buffer[index],buffer[index]);
 715                         usb_kbd_hid_desc.bcdHID=swap_16(usb_kbd_hid_desc.bcdHID);
 716                         usb_kbd_hid_desc.wDescriptorLength=swap_16(usb_kbd_hid_desc.wDescriptorLength);
 717                         usb_kbd_display_hid(&usb_kbd_hid_desc);
 718                         len=0;
 719                         break;
 720                 }
 721                 index+=head->bLength;
 722                 head=(struct usb_descriptor_header *)&buffer[index];
 723         }
 724         if(len>0)
 725                 return -1;
 726         len=usb_kbd_hid_desc.wDescriptorLength;
 727         if((index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0], len)) < 0) {
 728                 printf("reading report descriptor failed\n");
 729                 return -1;
 730         }
 731         printf(" report descriptor (size %u, read %d)\n", len, index);
 732         start=&buffer[0];
 733         end=&buffer[len];
 734         i=0;
 735         do {
 736                 index=fetch_item(start,end,&item);
 737                 i+=index;
 738                 i++;
 739                 if(index>=0)
 740                         usb_kbd_show_item(&item);
 741
 742                 start+=index;
 743                 start++;
 744         } while(index>=0);
 745
 746 }
 747
 748
 749 #endif
 750
 751 #endif /* CONFIG_USB_KEYBOARD */