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 #include <asm/byteorder.h>
  30
  31 #include <usb.h>
  32
  33 #undef USB_KBD_DEBUG
  34 /*
  35  * if overwrite_console returns 1, the stdin, stderr and stdout
  36  * are switched to the serial port, else the settings in the
  37  * environment are used
  38  */
  39 #ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
  40 extern int overwrite_console (void);
  41 #else
  42 int overwrite_console (void)
  43 {
  44         return (0);
  45 }
  46 #endif
  47
  48 #ifdef  USB_KBD_DEBUG
  49 #define USB_KBD_PRINTF(fmt,args...)     printf (fmt ,##args)
  50 #else
  51 #define USB_KBD_PRINTF(fmt,args...)
  52 #endif
  53
  54
  55 #define REPEAT_RATE  40/4 /* 40msec -> 25cps */
  56 #define REPEAT_DELAY 10 /* 10 x REAPEAT_RATE = 400msec */
  57
  58 #define NUM_LOCK        0x53
  59 #define CAPS_LOCK 0x39
  60 #define SCROLL_LOCK 0x47
  61
  62
  63 /* Modifier bits */
  64 #define LEFT_CNTR               0
  65 #define LEFT_SHIFT      1
  66 #define LEFT_ALT                2
  67 #define LEFT_GUI                3
  68 #define RIGHT_CNTR      4
  69 #define RIGHT_SHIFT     5
  70 #define RIGHT_ALT               6
  71 #define RIGHT_GUI               7
  72
  73 #define USB_KBD_BUFFER_LEN 0x20  /* size of the keyboardbuffer */
  74
  75 static volatile char usb_kbd_buffer[USB_KBD_BUFFER_LEN];
  76 static volatile int usb_in_pointer = 0;
  77 static volatile int usb_out_pointer = 0;
  78
  79 unsigned char new[8];
  80 unsigned char old[8];
  81 int repeat_delay;
  82 #define DEVNAME "usbkbd"
  83 static unsigned char num_lock = 0;
  84 static unsigned char caps_lock = 0;
  85 static unsigned char scroll_lock = 0;
  86 static unsigned char ctrl = 0;
  87
  88 static unsigned char leds __attribute__ ((aligned (0x4)));
  89
  90 static unsigned char usb_kbd_numkey[] = {
  91          '1', '2', '3', '4', '5', '6', '7', '8', '9', '0','\r',0x1b,'\b','\t',' ', '-',
  92          '=', '[', ']','\\', '#', ';', '\'', '`', ',', '.', '/'
  93 };
  94 static unsigned char usb_kbd_numkey_shifted[] = {
  95          '!', '@', '#', '$', '%', '^', '&', '*', '(', ')','\r',0x1b,'\b','\t',' ', '_',
  96          '+', '{', '}', '|', '~', ':', '"', '~', '<', '>', '?'
  97 };
  98
  99 /******************************************************************
 100  * Queue handling
 101  ******************************************************************/
 102 /* puts character in the queue and sets up the in and out pointer */
 103 static void usb_kbd_put_queue(char data)
 104 {
 105         if((usb_in_pointer+1)==USB_KBD_BUFFER_LEN) {
 106                 if(usb_out_pointer==0) {
 107                         return; /* buffer full */
 108                 } else{
 109                         usb_in_pointer=0;
 110                 }
 111         } else {
 112                 if((usb_in_pointer+1)==usb_out_pointer)
 113                         return; /* buffer full */
 114                 usb_in_pointer++;
 115         }
 116         usb_kbd_buffer[usb_in_pointer]=data;
 117         return;
 118 }
 119
 120 /* test if a character is in the queue */
 121 static int usb_kbd_testc(void)
 122 {
 123 #ifdef CFG_USB_EVENT_POLL
 124         usb_event_poll();
 125 #endif
 126         if(usb_in_pointer==usb_out_pointer)
 127                 return(0); /* no data */
 128         else
 129                 return(1);
 130 }
 131 /* gets the character from the queue */
 132 static int usb_kbd_getc(void)
 133 {
 134         char c;
 135         while(usb_in_pointer==usb_out_pointer) {
 136 #ifdef CFG_USB_EVENT_POLL
 137                 usb_event_poll();
 138 #endif
 139         }
 140         if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN)
 141                 usb_out_pointer=0;
 142         else
 143                 usb_out_pointer++;
 144         c=usb_kbd_buffer[usb_out_pointer];
 145         return (int)c;
 146
 147 }
 148
 149 /* forward decleration */
 150 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum);
 151
 152 /* search for keyboard and register it if found */
 153 int drv_usb_kbd_init(void)
 154 {
 155         int error,i;
 156         device_t usb_kbd_dev,*old_dev;
 157         struct usb_device *dev;
 158         char *stdinname  = getenv ("stdin");
 159
 160         usb_in_pointer=0;
 161         usb_out_pointer=0;
 162         /* scan all USB Devices */
 163         for(i=0;i<USB_MAX_DEVICE;i++) {
 164                 dev=usb_get_dev_index(i); /* get device */
 165                 if(dev->devnum!=-1) {
 166                         if(usb_kbd_probe(dev,0)==1) { /* Ok, we found a keyboard */
 167                                 /* check, if it is already registered */
 168                                 USB_KBD_PRINTF("USB KBD found set up device.\n");
 169                                 old_dev = device_get_by_name(DEVNAME);
 170                                 if(old_dev) {
 171                                         /* ok, already registered, just return ok */
 172                                         USB_KBD_PRINTF("USB KBD is already registered.\n");
 173                                         return 1;
 174                                 }
 175                                 /* register the keyboard */
 176                                 USB_KBD_PRINTF("USB KBD register.\n");
 177                                 memset (&usb_kbd_dev, 0, sizeof(device_t));
 178                                 strcpy(usb_kbd_dev.name, DEVNAME);
 179                                 usb_kbd_dev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
 180                                 usb_kbd_dev.putc = NULL;
 181                                 usb_kbd_dev.puts = NULL;
 182                                 usb_kbd_dev.getc = usb_kbd_getc;
 183                                 usb_kbd_dev.tstc = usb_kbd_testc;
 184                                 error = device_register (&usb_kbd_dev);
 185                                 if(error==0) {
 186                                         /* check if this is the standard input device */
 187                                         if(strcmp(stdinname,DEVNAME)==0) {
 188                                                 /* reassign the console */
 189                                                 if(overwrite_console()) {
 190                                                         return 1;
 191                                                 }
 192                                                 error=console_assign(stdin,DEVNAME);
 193                                                 if(error==0)
 194                                                         return 1;
 195                                                 else
 196                                                         return error;
 197                                         }
 198                                         return 1;
 199                                 }
 200                                 return error;
 201                         }
 202                 }
 203         }
 204         /* no USB Keyboard found */
 205         return -1;
 206 }
 207
 208
 209 /* deregistering the keyboard */
 210 int usb_kbd_deregister(void)
 211 {
 212         return device_deregister(DEVNAME);
 213 }
 214
 215 /**************************************************************************
 216  * Low Level drivers
 217  */
 218
 219 /* set the LEDs. Since this is used in the irq routine, the control job
 220    is issued with a timeout of 0. This means, that the job is queued without
 221    waiting for job completion */
 222
 223 static void usb_kbd_setled(struct usb_device *dev)
 224 {
 225         struct usb_interface_descriptor *iface;
 226         iface = &dev->config.if_desc[0];
 227         leds=0;
 228         if(scroll_lock!=0)
 229                 leds|=1;
 230         leds<<=1;
 231         if(caps_lock!=0)
 232                 leds|=1;
 233         leds<<=1;
 234         if(num_lock!=0)
 235                 leds|=1;
 236         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 237                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 238                 0x200, iface->bInterfaceNumber,(void *)&leds, 1, 0);
 239
 240 }
 241
 242
 243 #define CAPITAL_MASK 0x20
 244 /* Translate the scancode in ASCII */
 245 static int usb_kbd_translate(unsigned char scancode,unsigned char modifier,int pressed)
 246 {
 247         unsigned char keycode;
 248
 249         if(pressed==0) {
 250                 /* key released */
 251                 repeat_delay=0;
 252                 return 0;
 253         }
 254         if(pressed==2) {
 255                 repeat_delay++;
 256                 if(repeat_delay<REPEAT_DELAY)
 257                         return 0;
 258                 repeat_delay=REPEAT_DELAY;
 259         }
 260         keycode=0;
 261         if((scancode>3) && (scancode<=0x1d)) { /* alpha numeric values */
 262                 keycode=scancode-4 + 0x61;
 263                 if(caps_lock)
 264                         keycode&=~CAPITAL_MASK; /* switch to capital Letters */
 265                 if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0)) {
 266                         if(keycode & CAPITAL_MASK)
 267                                 keycode&=~CAPITAL_MASK; /* switch to capital Letters */
 268                         else
 269                                 keycode|=CAPITAL_MASK; /* switch to non capital Letters */
 270                 }
 271         }
 272         if((scancode>0x1d) && (scancode<0x3A)) {
 273                 if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0))  /* shifted */
 274                         keycode=usb_kbd_numkey_shifted[scancode-0x1e];
 275                 else /* non shifted */
 276                         keycode=usb_kbd_numkey[scancode-0x1e];
 277         }
 278
 279         if (ctrl)
 280                 keycode = scancode - 0x3;
 281
 282         if(pressed==1) {
 283                 if(scancode==NUM_LOCK) {
 284                         num_lock=~num_lock;
 285                         return 1;
 286                 }
 287                 if(scancode==CAPS_LOCK) {
 288                         caps_lock=~caps_lock;
 289                         return 1;
 290                 }
 291                 if(scancode==SCROLL_LOCK) {
 292                         scroll_lock=~scroll_lock;
 293                         return 1;
 294                 }
 295         }
 296         if(keycode!=0) {
 297                 USB_KBD_PRINTF("%c",keycode);
 298                 usb_kbd_put_queue(keycode);
 299         }
 300         return 0;
 301 }
 302
 303 /* Interrupt service routine */
 304 static int usb_kbd_irq(struct usb_device *dev)
 305 {
 306         int i,res;
 307
 308         if((dev->irq_status!=0)||(dev->irq_act_len!=8))
 309         {
 310                 USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",dev->irq_status,dev->irq_act_len);
 311                 return 1;
 312         }
 313         res=0;
 314
 315         switch (new[0]) {
 316         case 0x0:       /* No combo key pressed */
 317                 ctrl = 0;
 318                 break;
 319         case 0x01:      /* Left Ctrl pressed */
 320         case 0x10:      /* Right Ctrl pressed */
 321                 ctrl = 1;
 322                 break;
 323         }
 324
 325         for (i = 2; i < 8; i++) {
 326                 if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8]) {
 327                         res|=usb_kbd_translate(old[i],new[0],0);
 328                 }
 329                 if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8]) {
 330                         res|=usb_kbd_translate(new[i],new[0],1);
 331                 }
 332         }
 333         if((new[2]>3) && (old[2]==new[2])) /* still pressed */
 334                 res|=usb_kbd_translate(new[2],new[0],2);
 335         if(res==1)
 336                 usb_kbd_setled(dev);
 337         memcpy(&old[0],&new[0], 8);
 338         return 1; /* install IRQ Handler again */
 339 }
 340
 341 /* probes the USB device dev for keyboard type */
 342 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 343 {
 344         struct usb_interface_descriptor *iface;
 345         struct usb_endpoint_descriptor *ep;
 346         int pipe,maxp;
 347
 348         if (dev->descriptor.bNumConfigurations != 1) return 0;
 349         iface = &dev->config.if_desc[ifnum];
 350
 351         if (iface->bInterfaceClass != 3) return 0;
 352         if (iface->bInterfaceSubClass != 1) return 0;
 353         if (iface->bInterfaceProtocol != 1) return 0;
 354         if (iface->bNumEndpoints != 1) return 0;
 355
 356         ep = &iface->ep_desc[0];
 357
 358         if (!(ep->bEndpointAddress & 0x80)) return 0;
 359         if ((ep->bmAttributes & 3) != 3) return 0;
 360         USB_KBD_PRINTF("USB KBD found set protocol...\n");
 361         /* ok, we found a USB Keyboard, install it */
 362         /* usb_kbd_get_hid_desc(dev); */
 363         usb_set_protocol(dev, iface->bInterfaceNumber, 0);
 364         USB_KBD_PRINTF("USB KBD found set idle...\n");
 365         usb_set_idle(dev, iface->bInterfaceNumber, REPEAT_RATE, 0);
 366         memset(&new[0], 0, 8);
 367         memset(&old[0], 0, 8);
 368         repeat_delay=0;
 369         pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 370         maxp = usb_maxpacket(dev, pipe);
 371         dev->irq_handle=usb_kbd_irq;
 372         USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
 373         usb_submit_int_msg(dev,pipe,&new[0], maxp > 8 ? 8 : maxp,ep->bInterval);
 374         return 1;
 375 }
 376
 377
 378 #if 0
 379 struct usb_hid_descriptor {
 380         unsigned char  bLength;
 381         unsigned char  bDescriptorType; /* 0x21 for HID */
 382         unsigned short bcdHID; /* release number */
 383         unsigned char  bCountryCode;
 384         unsigned char  bNumDescriptors;
 385         unsigned char  bReportDescriptorType;
 386         unsigned short wDescriptorLength;
 387 } __attribute__ ((packed));
 388
 389 /*
 390  * We parse each description item into this structure. Short items data
 391  * values are expanded to 32-bit signed int, long items contain a pointer
 392  * into the data area.
 393  */
 394
 395 struct hid_item {
 396         unsigned char format;
 397         unsigned char size;
 398         unsigned char type;
 399         unsigned char tag;
 400         union {
 401             unsigned char   u8;
 402             char            s8;
 403             unsigned short  u16;
 404             short           s16;
 405             unsigned long   u32;
 406             long            s32;
 407             unsigned char  *longdata;
 408         } data;
 409 };
 410
 411 /*
 412  * HID report item format
 413  */
 414
 415 #define HID_ITEM_FORMAT_SHORT   0
 416 #define HID_ITEM_FORMAT_LONG    1
 417
 418 /*
 419  * Special tag indicating long items
 420  */
 421
 422 #define HID_ITEM_TAG_LONG       15
 423
 424
 425 static struct usb_hid_descriptor usb_kbd_hid_desc;
 426
 427 void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
 428 {
 429         printf("USB_HID_DESC:\n");
 430         printf("  bLenght               0x%x\n",hid->bLength);
 431         printf("  bcdHID                0x%x\n",hid->bcdHID);
 432         printf("  bCountryCode          %d\n",hid->bCountryCode);
 433         printf("  bNumDescriptors       0x%x\n",hid->bNumDescriptors);
 434         printf("  bReportDescriptorType 0x%x\n",hid->bReportDescriptorType);
 435         printf("  wDescriptorLength     0x%x\n",hid->wDescriptorLength);
 436 }
 437
 438
 439 /*
 440  * Fetch a report description item from the data stream. We support long
 441  * items, though they are not used yet.
 442  */
 443
 444 static int fetch_item(unsigned char *start,unsigned char *end, struct hid_item *item)
 445 {
 446         if((end - start) > 0) {
 447                 unsigned char b = *start++;
 448                 item->type = (b >> 2) & 3;
 449                 item->tag  = (b >> 4) & 15;
 450                 if (item->tag == HID_ITEM_TAG_LONG) {
 451                         item->format = HID_ITEM_FORMAT_LONG;
 452                         if ((end - start) >= 2) {
 453                                 item->size = *start++;
 454                                 item->tag  = *start++;
 455                                 if ((end - start) >= item->size) {
 456                                         item->data.longdata = start;
 457                                         start += item->size;
 458                                         return item->size;
 459                                 }
 460                         }
 461                 } else {
 462                         item->format = HID_ITEM_FORMAT_SHORT;
 463                         item->size = b & 3;
 464                         switch (item->size) {
 465                                 case 0:
 466                                         return item->size;
 467                                 case 1:
 468                                         if ((end - start) >= 1) {
 469                                                 item->data.u8 = *start++;
 470                                                 return item->size;
 471                                         }
 472                                         break;
 473                                 case 2:
 474                                         if ((end - start) >= 2) {
 475                                                 item->data.u16 = le16_to_cpu((unsigned short *)start);
 476                                                 start+=2;
 477                                                 return item->size;
 478                                         }
 479                                 case 3:
 480                                         item->size++;
 481                                         if ((end - start) >= 4) {
 482                                                 item->data.u32 = le32_to_cpu((unsigned long *)start);
 483                                                 start+=4;
 484                                                 return item->size;
 485                                         }
 486                         }
 487                 }
 488         }
 489         return -1;
 490 }
 491
 492 /*
 493  * HID report descriptor item type (prefix bit 2,3)
 494  */
 495
 496 #define HID_ITEM_TYPE_MAIN              0
 497 #define HID_ITEM_TYPE_GLOBAL            1
 498 #define HID_ITEM_TYPE_LOCAL             2
 499 #define HID_ITEM_TYPE_RESERVED          3
 500 /*
 501  * HID report descriptor main item tags
 502  */
 503
 504 #define HID_MAIN_ITEM_TAG_INPUT                 8
 505 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 506 #define HID_MAIN_ITEM_TAG_FEATURE               11
 507 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 508 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 509 /*
 510  * HID report descriptor main item contents
 511  */
 512
 513 #define HID_MAIN_ITEM_CONSTANT          0x001
 514 #define HID_MAIN_ITEM_VARIABLE          0x002
 515 #define HID_MAIN_ITEM_RELATIVE          0x004
 516 #define HID_MAIN_ITEM_WRAP              0x008
 517 #define HID_MAIN_ITEM_NONLINEAR         0x010
 518 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 519 #define HID_MAIN_ITEM_NULL_STATE        0x040
 520 #define HID_MAIN_ITEM_VOLATILE          0x080
 521 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 522
 523 /*
 524  * HID report descriptor collection item types
 525  */
 526
 527 #define HID_COLLECTION_PHYSICAL         0
 528 #define HID_COLLECTION_APPLICATION      1
 529 #define HID_COLLECTION_LOGICAL          2
 530 /*
 531  * HID report descriptor global item tags
 532  */
 533
 534 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 535 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 536 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 537 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 538 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 539 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 540 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 541 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 542 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 543 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 544 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 545 #define HID_GLOBAL_ITEM_TAG_POP                 11
 546
 547 /*
 548  * HID report descriptor local item tags
 549  */
 550
 551 #define HID_LOCAL_ITEM_TAG_USAGE                0
 552 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 553 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 554 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 555 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 556 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 557 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 558 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 559 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 560 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 561
 562
 563 static void usb_kbd_show_item(struct hid_item *item)
 564 {
 565         switch(item->type) {
 566                 case HID_ITEM_TYPE_MAIN:
 567                         switch(item->tag) {
 568                                 case HID_MAIN_ITEM_TAG_INPUT:
 569                                         printf("Main Input");
 570                                         break;
 571                                 case HID_MAIN_ITEM_TAG_OUTPUT:
 572                                         printf("Main Output");
 573                                         break;
 574                                 case HID_MAIN_ITEM_TAG_FEATURE:
 575                                         printf("Main Feature");
 576                                         break;
 577                                 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 578                                         printf("Main Begin Collection");
 579                                         break;
 580                                 case HID_MAIN_ITEM_TAG_END_COLLECTION:
 581                                         printf("Main End Collection");
 582                                         break;
 583                                 default:
 584                                         printf("Main reserved %d",item->tag);
 585                                         break;
 586                         }
 587                         break;
 588                 case HID_ITEM_TYPE_GLOBAL:
 589                         switch(item->tag) {
 590                                 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 591                                         printf("- Global Usage Page");
 592                                         break;
 593                                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 594                                         printf("- Global Logical Minimum");
 595                                         break;
 596                                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 597                                         printf("- Global Logical Maximum");
 598                                         break;
 599                                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 600                                         printf("- Global physical Minimum");
 601                                         break;
 602                                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 603                                         printf("- Global physical Maximum");
 604                                         break;
 605                                 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 606                                         printf("- Global Unit Exponent");
 607                                         break;
 608                                 case HID_GLOBAL_ITEM_TAG_UNIT:
 609                                         printf("- Global Unit");
 610                                         break;
 611                                 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 612                                         printf("- Global Report Size");
 613                                         break;
 614                                 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 615                                         printf("- Global Report ID");
 616                                         break;
 617                                 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 618                                         printf("- Global Report Count");
 619                                         break;
 620                                 case HID_GLOBAL_ITEM_TAG_PUSH:
 621                                         printf("- Global Push");
 622                                         break;
 623                                 case HID_GLOBAL_ITEM_TAG_POP:
 624                                         printf("- Global Pop");
 625                                         break;
 626                                 default:
 627                                         printf("- Global reserved %d",item->tag);
 628                                         break;
 629                         }
 630                         break;
 631                 case HID_ITEM_TYPE_LOCAL:
 632                         switch(item->tag) {
 633                                 case HID_LOCAL_ITEM_TAG_USAGE:
 634                                         printf("-- Local Usage");
 635                                         break;
 636                                 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 637                                         printf("-- Local Usage Minimum");
 638                                         break;
 639                                 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 640                                         printf("-- Local Usage Maximum");
 641                                         break;
 642                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
 643                                         printf("-- Local Designator Index");
 644                                         break;
 645                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
 646                                         printf("-- Local Designator Minimum");
 647                                         break;
 648                                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
 649                                         printf("-- Local Designator Maximum");
 650                                         break;
 651                                 case HID_LOCAL_ITEM_TAG_STRING_INDEX:
 652                                         printf("-- Local String Index");
 653                                         break;
 654                                 case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
 655                                         printf("-- Local String Minimum");
 656                                         break;
 657                                 case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
 658                                         printf("-- Local String Maximum");
 659                                         break;
 660                                 case HID_LOCAL_ITEM_TAG_DELIMITER:
 661                                         printf("-- Local Delimiter");
 662                                         break;
 663                                 default:
 664                                         printf("-- Local reserved %d",item->tag);
 665                                         break;
 666                         }
 667                         break;
 668                 default:
 669                         printf("--- reserved %d",item->type);
 670                         break;
 671         }
 672         switch(item->size) {
 673                 case 1:
 674                         printf("  %d",item->data.u8);
 675                         break;
 676                 case 2:
 677                         printf("  %d",item->data.u16);
 678                         break;
 679                 case 4:
 680                         printf("  %ld",item->data.u32);
 681                         break;
 682         }
 683         printf("\n");
 684 }
 685
 686
 687 static int usb_kbd_get_hid_desc(struct usb_device *dev)
 688 {
 689         unsigned char buffer[256];
 690         struct usb_descriptor_header *head;
 691         struct usb_config_descriptor *config;
 692         int index,len,i;
 693         unsigned char *start, *end;
 694         struct hid_item item;
 695
 696         if(usb_get_configuration_no(dev,&buffer[0],0)==-1)
 697                 return -1;
 698         head =(struct usb_descriptor_header *)&buffer[0];
 699         if(head->bDescriptorType!=USB_DT_CONFIG) {
 700                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
 701                 return -1;
 702         }
 703         index=head->bLength;
 704         config=(struct usb_config_descriptor *)&buffer[0];
 705         len=le16_to_cpu(config->wTotalLength);
 706         /* Ok the first entry must be a configuration entry, now process the others */
 707         head=(struct usb_descriptor_header *)&buffer[index];
 708         while(index+1 < len) {
 709                 if(head->bDescriptorType==USB_DT_HID) {
 710                         printf("HID desc found\n");
 711                         memcpy(&usb_kbd_hid_desc,&buffer[index],buffer[index]);
 712                         le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
 713                         le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
 714                         usb_kbd_display_hid(&usb_kbd_hid_desc);
 715                         len=0;
 716                         break;
 717                 }
 718                 index+=head->bLength;
 719                 head=(struct usb_descriptor_header *)&buffer[index];
 720         }
 721         if(len>0)
 722                 return -1;
 723         len=usb_kbd_hid_desc.wDescriptorLength;
 724         if((index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0], len)) < 0) {
 725                 printf("reading report descriptor failed\n");
 726                 return -1;
 727         }
 728         printf(" report descriptor (size %u, read %d)\n", len, index);
 729         start = &buffer[0];
 730         end = &buffer[len];
 731         i=0;
 732         do {
 733                 index=fetch_item(start,end,&item);
 734                 i+=index;
 735                 i++;
 736                 if(index>=0)
 737                         usb_kbd_show_item(&item);
 738
 739                 start+=index;
 740                 start++;
 741         } while(index>=0);
 742
 743 }
 744
 745 #endif