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 <stdio_dev.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 CONFIG_SYS_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 REPEAT_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 char usb_kbd_buffer[USB_KBD_BUFFER_LEN];
  76 static int usb_in_pointer;
  77 static int usb_out_pointer;
  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;
  84 static unsigned char caps_lock;
  85 static unsigned char scroll_lock;
  86 static unsigned char ctrl;
  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',
  92         '\r', 0x1b, '\b', '\t', ' ', '-', '=', '[', ']',
  93         '\\', '#', ';', '\'', '`', ',', '.', '/'
  94 };
  95 static unsigned char usb_kbd_numkey_shifted[] = {
  96         '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
  97         '\r', 0x1b, '\b', '\t', ' ', '_', '+', '{', '}',
  98         '|', '~', ':', '"', '~', '<', '>', '?'
  99 };
 100
 101 /******************************************************************
 102  * Queue handling
 103  ******************************************************************/
 104 /* puts character in the queue and sets up the in and out pointer */
 105 static void usb_kbd_put_queue(char data)
 106 {
 107         if ((usb_in_pointer+1) == USB_KBD_BUFFER_LEN) {
 108                 if (usb_out_pointer == 0)
 109                         return; /* buffer full */
 110                 else
 111                         usb_in_pointer = 0;
 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 CONFIG_SYS_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 CONFIG_SYS_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;
 157         struct stdio_dev 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 == NULL)
 167                         return -1;
 168                 if (dev->devnum != -1) {
 169                         /* Ok, we found a keyboard */
 170                         if (usb_kbd_probe(dev, 0) == 1) {
 171                                 /* check, if it is already registered */
 172                                 USB_KBD_PRINTF("USB KBD found set up "
 173                                                 "device.\n");
 174                                 old_dev = stdio_get_by_name(DEVNAME);
 175                                 if (old_dev) {
 176                                         /* already registered, just return ok */
 177                                         USB_KBD_PRINTF("USB KBD is already "
 178                                                         "registered.\n");
 179                                         return 1;
 180                                 }
 181                                 /* register the keyboard */
 182                                 USB_KBD_PRINTF("USB KBD register.\n");
 183                                 memset(&usb_kbd_dev, 0,
 184                                                 sizeof(struct stdio_dev));
 185                                 strcpy(usb_kbd_dev.name, DEVNAME);
 186                                 usb_kbd_dev.flags =  DEV_FLAGS_INPUT |
 187                                                         DEV_FLAGS_SYSTEM;
 188                                 usb_kbd_dev.putc = NULL;
 189                                 usb_kbd_dev.puts = NULL;
 190                                 usb_kbd_dev.getc = usb_kbd_getc;
 191                                 usb_kbd_dev.tstc = usb_kbd_testc;
 192                                 usb_kbd_dev.priv = (void *)dev;
 193                                 error = stdio_register(&usb_kbd_dev);
 194                                 if (error == 0) {
 195                                         /*
 196                                          * check if this is the standard
 197                                          * input device
 198                                          */
 199                                         if (strcmp(stdinname, DEVNAME) == 0) {
 200                                                 /* reassign the console */
 201                                                 if (overwrite_console())
 202                                                         return 1;
 203                                                 error = console_assign(stdin,
 204                                                                 DEVNAME);
 205                                                 if (error == 0)
 206                                                         return 1;
 207                                                 else
 208                                                         return error;
 209                                         }
 210                                         return 1;
 211                                 }
 212                                 return error;
 213                         }
 214                 }
 215         }
 216         /* no USB Keyboard found */
 217         return -1;
 218 }
 219
 220
 221 /* deregistering the keyboard */
 222 int usb_kbd_deregister(void)
 223 {
 224 #ifdef CONFIG_SYS_STDIO_DEREGISTER
 225         return stdio_deregister(DEVNAME);
 226 #else
 227         return 1;
 228 #endif
 229 }
 230
 231 /**************************************************************************
 232  * Low Level drivers
 233  */
 234
 235 /* set the LEDs. Since this is used in the irq routine, the control job
 236    is issued with a timeout of 0. This means, that the job is queued without
 237    waiting for job completion */
 238
 239 static void usb_kbd_setled(struct usb_device *dev)
 240 {
 241         struct usb_interface *iface;
 242         iface = &dev->config.if_desc[0];
 243         leds = 0;
 244         if (scroll_lock != 0)
 245                 leds |= 1;
 246         leds <<= 1;
 247         if (caps_lock != 0)
 248                 leds |= 1;
 249         leds <<= 1;
 250         if (num_lock != 0)
 251                 leds |= 1;
 252         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 253                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 254                 0x200, iface->desc.bInterfaceNumber, (void *)&leds, 1, 0);
 255
 256 }
 257
 258
 259 #define CAPITAL_MASK 0x20
 260 /* Translate the scancode in ASCII */
 261 static int usb_kbd_translate(unsigned char scancode, unsigned char modifier,
 262                                 int pressed)
 263 {
 264         unsigned char keycode;
 265
 266         if (pressed == 0) {
 267                 /* key released */
 268                 repeat_delay = 0;
 269                 return 0;
 270         }
 271         if (pressed == 2) {
 272                 repeat_delay++;
 273                 if (repeat_delay < REPEAT_DELAY)
 274                         return 0;
 275                 repeat_delay = REPEAT_DELAY;
 276         }
 277         keycode = 0;
 278         if ((scancode > 3) && (scancode <= 0x1d)) { /* alpha numeric values */
 279                 keycode = scancode - 4 + 0x61;
 280                 if (caps_lock)
 281                         /* switch to capital Letters */
 282                         keycode &= ~CAPITAL_MASK;
 283                 if (((modifier&(1 << LEFT_SHIFT)) != 0) ||
 284                         ((modifier&(1 << RIGHT_SHIFT)) != 0)) {
 285                         if (keycode & CAPITAL_MASK)
 286                                 /* switch to capital Letters */
 287                                 keycode &= ~CAPITAL_MASK;
 288                         else
 289                                 /* switch to non capital Letters */
 290                                 keycode |= CAPITAL_MASK;
 291                 }
 292         }
 293         if ((scancode > 0x1d) && (scancode < 0x3A)) {
 294                 if (((modifier&(1 << LEFT_SHIFT)) != 0) ||
 295                         ((modifier&(1 << RIGHT_SHIFT)) != 0))  /* shifted */
 296                         keycode = usb_kbd_numkey_shifted[scancode-0x1e];
 297                 else /* non shifted */
 298                         keycode = usb_kbd_numkey[scancode-0x1e];
 299         }
 300
 301         if (ctrl)
 302                 keycode = scancode - 0x3;
 303
 304         if (pressed == 1) {
 305                 if (scancode == NUM_LOCK) {
 306                         num_lock = ~num_lock;
 307                         return 1;
 308                 }
 309                 if (scancode == CAPS_LOCK) {
 310                         caps_lock = ~caps_lock;
 311                         return 1;
 312                 }
 313                 if (scancode == SCROLL_LOCK) {
 314                         scroll_lock = ~scroll_lock;
 315                         return 1;
 316                 }
 317         }
 318         if (keycode != 0) {
 319                 USB_KBD_PRINTF("%c", keycode);
 320                 usb_kbd_put_queue(keycode);
 321         }
 322         return 0;
 323 }
 324
 325 /* Interrupt service routine */
 326 static int usb_kbd_irq(struct usb_device *dev)
 327 {
 328         int i, res;
 329
 330         if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) {
 331                 USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",
 332                                 dev->irq_status, dev->irq_act_len);
 333                 return 1;
 334         }
 335         res = 0;
 336
 337         switch (new[0]) {
 338         case 0x0:       /* No combo key pressed */
 339                 ctrl = 0;
 340                 break;
 341         case 0x01:      /* Left Ctrl pressed */
 342         case 0x10:      /* Right Ctrl pressed */
 343                 ctrl = 1;
 344                 break;
 345         }
 346
 347         for (i = 2; i < 8; i++) {
 348                 if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8])
 349                         res |= usb_kbd_translate(old[i], new[0], 0);
 350
 351                 if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8])
 352                         res |= usb_kbd_translate(new[i], new[0], 1);
 353         }
 354
 355         if ((new[2] > 3) && (old[2] == new[2])) /* still pressed */
 356                 res |= usb_kbd_translate(new[2], new[0], 2);
 357         if (res == 1)
 358                 usb_kbd_setled(dev);
 359
 360         memcpy(&old[0], &new[0], 8);
 361
 362         return 1; /* install IRQ Handler again */
 363 }
 364
 365 /* probes the USB device dev for keyboard type */
 366 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 367 {
 368         struct usb_interface *iface;
 369         struct usb_endpoint_descriptor *ep;
 370         int pipe, maxp;
 371
 372         if (dev->descriptor.bNumConfigurations != 1)
 373                 return 0;
 374         iface = &dev->config.if_desc[ifnum];
 375
 376         if (iface->desc.bInterfaceClass != 3)
 377                 return 0;
 378         if (iface->desc.bInterfaceSubClass != 1)
 379                 return 0;
 380         if (iface->desc.bInterfaceProtocol != 1)
 381                 return 0;
 382         if (iface->desc.bNumEndpoints != 1)
 383                 return 0;
 384
 385         ep = &iface->ep_desc[0];
 386
 387         if (!(ep->bEndpointAddress & 0x80))
 388                 return 0;
 389         if ((ep->bmAttributes & 3) != 3)
 390                 return 0;
 391         USB_KBD_PRINTF("USB KBD found set protocol...\n");
 392         /* ok, we found a USB Keyboard, install it */
 393         /* usb_kbd_get_hid_desc(dev); */
 394         usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
 395         USB_KBD_PRINTF("USB KBD found set idle...\n");
 396         usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
 397         memset(&new[0], 0, 8);
 398         memset(&old[0], 0, 8);
 399         repeat_delay = 0;
 400         pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 401         maxp = usb_maxpacket(dev, pipe);
 402         dev->irq_handle = usb_kbd_irq;
 403         USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
 404         usb_submit_int_msg(dev, pipe, &new[0], maxp > 8 ? 8 : maxp,
 405                                 ep->bInterval);
 406         return 1;
 407 }
 408
 409
 410 #if 0
 411 struct usb_hid_descriptor {
 412         unsigned char  bLength;
 413         unsigned char  bDescriptorType; /* 0x21 for HID */
 414         unsigned short bcdHID; /* release number */
 415         unsigned char  bCountryCode;
 416         unsigned char  bNumDescriptors;
 417         unsigned char  bReportDescriptorType;
 418         unsigned short wDescriptorLength;
 419 } __packed;
 420
 421 /*
 422  * We parse each description item into this structure. Short items data
 423  * values are expanded to 32-bit signed int, long items contain a pointer
 424  * into the data area.
 425  */
 426
 427 struct hid_item {
 428         unsigned char format;
 429         unsigned char size;
 430         unsigned char type;
 431         unsigned char tag;
 432         union {
 433             unsigned char   u8;
 434             char            s8;
 435             unsigned short  u16;
 436             short           s16;
 437             unsigned long   u32;
 438             long            s32;
 439             unsigned char  *longdata;
 440         } data;
 441 };
 442
 443 /*
 444  * HID report item format
 445  */
 446
 447 #define HID_ITEM_FORMAT_SHORT   0
 448 #define HID_ITEM_FORMAT_LONG    1
 449
 450 /*
 451  * Special tag indicating long items
 452  */
 453
 454 #define HID_ITEM_TAG_LONG       15
 455
 456
 457 static struct usb_hid_descriptor usb_kbd_hid_desc;
 458
 459 void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
 460 {
 461         printf("USB_HID_DESC:\n");
 462         printf("  bLenght               0x%x\n", hid->bLength);
 463         printf("  bcdHID                0x%x\n", hid->bcdHID);
 464         printf("  bCountryCode          %d\n", hid->bCountryCode);
 465         printf("  bNumDescriptors       0x%x\n", hid->bNumDescriptors);
 466         printf("  bReportDescriptorType 0x%x\n", hid->bReportDescriptorType);
 467         printf("  wDescriptorLength     0x%x\n", hid->wDescriptorLength);
 468 }
 469
 470
 471 /*
 472  * Fetch a report description item from the data stream. We support long
 473  * items, though they are not used yet.
 474  */
 475
 476 static int fetch_item(unsigned char *start, unsigned char *end,
 477                         struct hid_item *item)
 478 {
 479         if ((end - start) > 0) {
 480                 unsigned char b = *start++;
 481                 item->type = (b >> 2) & 3;
 482                 item->tag  = (b >> 4) & 15;
 483                 if (item->tag == HID_ITEM_TAG_LONG) {
 484                         item->format = HID_ITEM_FORMAT_LONG;
 485                         if ((end - start) >= 2) {
 486                                 item->size = *start++;
 487                                 item->tag  = *start++;
 488                                 if ((end - start) >= item->size) {
 489                                         item->data.longdata = start;
 490                                         start += item->size;
 491                                         return item->size;
 492                                 }
 493                         }
 494                 } else {
 495                         item->format = HID_ITEM_FORMAT_SHORT;
 496                         item->size = b & 3;
 497                         switch (item->size) {
 498                         case 0:
 499                                 return item->size;
 500                         case 1:
 501                                 if ((end - start) >= 1) {
 502                                         item->data.u8 = *start++;
 503                                         return item->size;
 504                                 }
 505                                 break;
 506                         case 2:
 507                                 if ((end - start) >= 2) {
 508                                         item->data.u16 = le16_to_cpu(
 509                                                 (unsigned short *)start);
 510                                         start += 2;
 511                                         return item->size;
 512                                 }
 513                         case 3:
 514                                 item->size++;
 515                                 if ((end - start) >= 4) {
 516                                         item->data.u32 = le32_to_cpu(
 517                                                 (unsigned long *)start);
 518                                         start += 4;
 519                                         return item->size;
 520                                 }
 521                         }
 522                 }
 523         }
 524         return -1;
 525 }
 526
 527 /*
 528  * HID report descriptor item type (prefix bit 2, 3)
 529  */
 530
 531 #define HID_ITEM_TYPE_MAIN              0
 532 #define HID_ITEM_TYPE_GLOBAL            1
 533 #define HID_ITEM_TYPE_LOCAL             2
 534 #define HID_ITEM_TYPE_RESERVED          3
 535 /*
 536  * HID report descriptor main item tags
 537  */
 538
 539 #define HID_MAIN_ITEM_TAG_INPUT                 8
 540 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 541 #define HID_MAIN_ITEM_TAG_FEATURE               11
 542 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 543 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 544 /*
 545  * HID report descriptor main item contents
 546  */
 547
 548 #define HID_MAIN_ITEM_CONSTANT          0x001
 549 #define HID_MAIN_ITEM_VARIABLE          0x002
 550 #define HID_MAIN_ITEM_RELATIVE          0x004
 551 #define HID_MAIN_ITEM_WRAP              0x008
 552 #define HID_MAIN_ITEM_NONLINEAR         0x010
 553 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 554 #define HID_MAIN_ITEM_NULL_STATE        0x040
 555 #define HID_MAIN_ITEM_VOLATILE          0x080
 556 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 557
 558 /*
 559  * HID report descriptor collection item types
 560  */
 561
 562 #define HID_COLLECTION_PHYSICAL         0
 563 #define HID_COLLECTION_APPLICATION      1
 564 #define HID_COLLECTION_LOGICAL          2
 565 /*
 566  * HID report descriptor global item tags
 567  */
 568
 569 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 570 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 571 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 572 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 573 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 574 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 575 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 576 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 577 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 578 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 579 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 580 #define HID_GLOBAL_ITEM_TAG_POP                 11
 581
 582 /*
 583  * HID report descriptor local item tags
 584  */
 585
 586 #define HID_LOCAL_ITEM_TAG_USAGE                0
 587 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 588 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 589 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 590 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 591 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 592 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 593 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 594 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 595 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 596
 597
 598 static void usb_kbd_show_item(struct hid_item *item)
 599 {
 600         switch (item->type) {
 601         case HID_ITEM_TYPE_MAIN:
 602                 switch (item->tag) {
 603                 case HID_MAIN_ITEM_TAG_INPUT:
 604                         printf("Main Input");
 605                         break;
 606                 case HID_MAIN_ITEM_TAG_OUTPUT:
 607                         printf("Main Output");
 608                         break;
 609                 case HID_MAIN_ITEM_TAG_FEATURE:
 610                         printf("Main Feature");
 611                         break;
 612                 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 613                         printf("Main Begin Collection");
 614                         break;
 615                 case HID_MAIN_ITEM_TAG_END_COLLECTION:
 616                         printf("Main End Collection");
 617                         break;
 618                 default:
 619                         printf("Main reserved %d", item->tag);
 620                         break;
 621                 }
 622                 break;
 623         case HID_ITEM_TYPE_GLOBAL:
 624                 switch (item->tag) {
 625                 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 626                         printf("- Global Usage Page");
 627                         break;
 628                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 629                         printf("- Global Logical Minimum");
 630                         break;
 631                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 632                         printf("- Global Logical Maximum");
 633                         break;
 634                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 635                         printf("- Global physical Minimum");
 636                         break;
 637                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 638                         printf("- Global physical Maximum");
 639                         break;
 640                 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 641                         printf("- Global Unit Exponent");
 642                         break;
 643                 case HID_GLOBAL_ITEM_TAG_UNIT:
 644                         printf("- Global Unit");
 645                         break;
 646                 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 647                         printf("- Global Report Size");
 648                         break;
 649                 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 650                         printf("- Global Report ID");
 651                         break;
 652                 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 653                         printf("- Global Report Count");
 654                         break;
 655                 case HID_GLOBAL_ITEM_TAG_PUSH:
 656                         printf("- Global Push");
 657                         break;
 658                 case HID_GLOBAL_ITEM_TAG_POP:
 659                         printf("- Global Pop");
 660                         break;
 661                 default:
 662                         printf("- Global reserved %d", item->tag);
 663                         break;
 664                 }
 665                 break;
 666         case HID_ITEM_TYPE_LOCAL:
 667                 switch (item->tag) {
 668                 case HID_LOCAL_ITEM_TAG_USAGE:
 669                         printf("-- Local Usage");
 670                         break;
 671                 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 672                         printf("-- Local Usage Minimum");
 673                         break;
 674                 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 675                         printf("-- Local Usage Maximum");
 676                         break;
 677                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
 678                         printf("-- Local Designator Index");
 679                         break;
 680                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
 681                         printf("-- Local Designator Minimum");
 682                         break;
 683                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
 684                         printf("-- Local Designator Maximum");
 685                         break;
 686                 case HID_LOCAL_ITEM_TAG_STRING_INDEX:
 687                         printf("-- Local String Index");
 688                         break;
 689                 case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
 690                         printf("-- Local String Minimum");
 691                         break;
 692                 case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
 693                         printf("-- Local String Maximum");
 694                         break;
 695                 case HID_LOCAL_ITEM_TAG_DELIMITER:
 696                         printf("-- Local Delimiter");
 697                         break;
 698                 default:
 699                         printf("-- Local reserved %d", item->tag);
 700                         break;
 701                 }
 702                 break;
 703         default:
 704                 printf("--- reserved %d", item->type);
 705                 break;
 706         }
 707         switch (item->size) {
 708         case 1:
 709                 printf("  %d", item->data.u8);
 710                 break;
 711         case 2:
 712                 printf("  %d", item->data.u16);
 713                 break;
 714         case 4:
 715                 printf("  %ld", item->data.u32);
 716                 break;
 717         }
 718         printf("\n");
 719 }
 720
 721
 722 static int usb_kbd_get_hid_desc(struct usb_device *dev)
 723 {
 724         unsigned char buffer[256];
 725         struct usb_descriptor_header *head;
 726         struct usb_config_descriptor *config;
 727         int index, len, i;
 728         unsigned char *start, *end;
 729         struct hid_item item;
 730
 731         if (usb_get_configuration_no(dev, &buffer[0], 0) == -1)
 732                 return -1;
 733         head = (struct usb_descriptor_header *)&buffer[0];
 734         if (head->bDescriptorType != USB_DT_CONFIG) {
 735                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
 736                                 head->bDescriptorType);
 737                 return -1;
 738         }
 739         index = head->bLength;
 740         config = (struct usb_config_descriptor *)&buffer[0];
 741         len = le16_to_cpu(config->wTotalLength);
 742         /*
 743          * Ok the first entry must be a configuration entry,
 744          * now process the others
 745          */
 746         head = (struct usb_descriptor_header *)&buffer[index];
 747         while (index+1 < len) {
 748                 if (head->bDescriptorType == USB_DT_HID) {
 749                         printf("HID desc found\n");
 750                         memcpy(&usb_kbd_hid_desc, &buffer[index],
 751                                         buffer[index]);
 752                         le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
 753                         le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
 754                         usb_kbd_display_hid(&usb_kbd_hid_desc);
 755                         len = 0;
 756                         break;
 757                 }
 758                 index += head->bLength;
 759                 head = (struct usb_descriptor_header *)&buffer[index];
 760         }
 761         if (len > 0)
 762                 return -1;
 763         len = usb_kbd_hid_desc.wDescriptorLength;
 764         index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0],
 765                                                 len);
 766         if (index < 0) {
 767                 printf("reading report descriptor failed\n");
 768                 return -1;
 769         }
 770         printf(" report descriptor (size %u, read %d)\n", len, index);
 771         start = &buffer[0];
 772         end = &buffer[len];
 773         i = 0;
 774         do {
 775                 index = fetch_item(start, end, &item);
 776                 i += index;
 777                 i++;
 778                 if (index >= 0)
 779                         usb_kbd_show_item(&item);
 780
 781                 start += index;
 782                 start++;
 783         } while (index >= 0);
 784
 785 }
 786
 787 #endif