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 static int usb_kbd_irq_worker(struct usb_device *dev);
 102
 103 /******************************************************************
 104  * Interrupt polling
 105  ******************************************************************/
 106 static inline void usb_kbd_poll_for_event(struct usb_device *dev)
 107 {
 108 #if     defined(CONFIG_SYS_USB_EVENT_POLL)
 109         usb_event_poll();
 110         usb_kbd_irq_worker(dev);
 111 #elif   defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
 112         struct usb_interface *iface;
 113         iface = &dev->config.if_desc[0];
 114         usb_get_report(dev, iface->desc.bInterfaceNumber,
 115                         1, 1, new, sizeof(new));
 116         if (memcmp(old, new, sizeof(new)))
 117                 usb_kbd_irq_worker(dev);
 118 #endif
 119 }
 120
 121 /******************************************************************
 122  * Queue handling
 123  ******************************************************************/
 124 /* puts character in the queue and sets up the in and out pointer */
 125 static void usb_kbd_put_queue(char data)
 126 {
 127         if ((usb_in_pointer+1) == USB_KBD_BUFFER_LEN) {
 128                 if (usb_out_pointer == 0)
 129                         return; /* buffer full */
 130                 else
 131                         usb_in_pointer = 0;
 132         } else {
 133                 if ((usb_in_pointer+1) == usb_out_pointer)
 134                         return; /* buffer full */
 135                 usb_in_pointer++;
 136         }
 137         usb_kbd_buffer[usb_in_pointer] = data;
 138         return;
 139 }
 140
 141 /* test if a character is in the queue */
 142 static int usb_kbd_testc(void)
 143 {
 144         struct stdio_dev *dev;
 145         struct usb_device *usb_kbd_dev;
 146
 147         dev = stdio_get_by_name("usbkbd");
 148         usb_kbd_dev = (struct usb_device *)dev->priv;
 149
 150         usb_kbd_poll_for_event(usb_kbd_dev);
 151
 152         if (usb_in_pointer == usb_out_pointer)
 153                 return 0; /* no data */
 154         else
 155                 return 1;
 156 }
 157 /* gets the character from the queue */
 158 static int usb_kbd_getc(void)
 159 {
 160         char c;
 161
 162         struct stdio_dev *dev;
 163         struct usb_device *usb_kbd_dev;
 164
 165         dev = stdio_get_by_name("usbkbd");
 166         usb_kbd_dev = (struct usb_device *)dev->priv;
 167
 168         while (usb_in_pointer == usb_out_pointer)
 169                 usb_kbd_poll_for_event(usb_kbd_dev);
 170
 171         if ((usb_out_pointer+1) == USB_KBD_BUFFER_LEN)
 172                 usb_out_pointer = 0;
 173         else
 174                 usb_out_pointer++;
 175         c = usb_kbd_buffer[usb_out_pointer];
 176         return (int)c;
 177
 178 }
 179
 180 /* forward decleration */
 181 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum);
 182
 183 /* search for keyboard and register it if found */
 184 int drv_usb_kbd_init(void)
 185 {
 186         int error, i;
 187         struct stdio_dev usb_kbd_dev, *old_dev;
 188         struct usb_device *dev;
 189         char *stdinname = getenv("stdin");
 190
 191         usb_in_pointer = 0;
 192         usb_out_pointer = 0;
 193         /* scan all USB Devices */
 194         for (i = 0 ; i < USB_MAX_DEVICE ; i++) {
 195                 dev = usb_get_dev_index(i); /* get device */
 196                 if (dev == NULL)
 197                         return -1;
 198                 if (dev->devnum != -1) {
 199                         /* Ok, we found a keyboard */
 200                         if (usb_kbd_probe(dev, 0) == 1) {
 201                                 /* check, if it is already registered */
 202                                 USB_KBD_PRINTF("USB KBD found set up "
 203                                                 "device.\n");
 204                                 old_dev = stdio_get_by_name(DEVNAME);
 205                                 if (old_dev) {
 206                                         /* already registered, just return ok */
 207                                         USB_KBD_PRINTF("USB KBD is already "
 208                                                         "registered.\n");
 209                                         return 1;
 210                                 }
 211                                 /* register the keyboard */
 212                                 USB_KBD_PRINTF("USB KBD register.\n");
 213                                 memset(&usb_kbd_dev, 0,
 214                                                 sizeof(struct stdio_dev));
 215                                 strcpy(usb_kbd_dev.name, DEVNAME);
 216                                 usb_kbd_dev.flags =  DEV_FLAGS_INPUT |
 217                                                         DEV_FLAGS_SYSTEM;
 218                                 usb_kbd_dev.putc = NULL;
 219                                 usb_kbd_dev.puts = NULL;
 220                                 usb_kbd_dev.getc = usb_kbd_getc;
 221                                 usb_kbd_dev.tstc = usb_kbd_testc;
 222                                 usb_kbd_dev.priv = (void *)dev;
 223                                 error = stdio_register(&usb_kbd_dev);
 224                                 if (error == 0) {
 225                                         /*
 226                                          * check if this is the standard
 227                                          * input device
 228                                          */
 229                                         if (strcmp(stdinname, DEVNAME) == 0) {
 230                                                 /* reassign the console */
 231                                                 if (overwrite_console())
 232                                                         return 1;
 233                                                 error = console_assign(stdin,
 234                                                                 DEVNAME);
 235                                                 if (error == 0)
 236                                                         return 1;
 237                                                 else
 238                                                         return error;
 239                                         }
 240                                         return 1;
 241                                 }
 242                                 return error;
 243                         }
 244                 }
 245         }
 246         /* no USB Keyboard found */
 247         return -1;
 248 }
 249
 250
 251 /* deregistering the keyboard */
 252 int usb_kbd_deregister(void)
 253 {
 254 #ifdef CONFIG_SYS_STDIO_DEREGISTER
 255         return stdio_deregister(DEVNAME);
 256 #else
 257         return 1;
 258 #endif
 259 }
 260
 261 /**************************************************************************
 262  * Low Level drivers
 263  */
 264
 265 /* set the LEDs. Since this is used in the irq routine, the control job
 266    is issued with a timeout of 0. This means, that the job is queued without
 267    waiting for job completion */
 268
 269 static void usb_kbd_setled(struct usb_device *dev)
 270 {
 271         struct usb_interface *iface;
 272         iface = &dev->config.if_desc[0];
 273         leds = 0;
 274         if (scroll_lock != 0)
 275                 leds |= 1;
 276         leds <<= 1;
 277         if (caps_lock != 0)
 278                 leds |= 1;
 279         leds <<= 1;
 280         if (num_lock != 0)
 281                 leds |= 1;
 282         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 283                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 284                 0x200, iface->desc.bInterfaceNumber, (void *)&leds, 1, 0);
 285
 286 }
 287
 288
 289 #define CAPITAL_MASK 0x20
 290 /* Translate the scancode in ASCII */
 291 static int usb_kbd_translate(unsigned char scancode, unsigned char modifier,
 292                                 int pressed)
 293 {
 294         unsigned char keycode;
 295
 296         if (pressed == 0) {
 297                 /* key released */
 298                 repeat_delay = 0;
 299                 return 0;
 300         }
 301         if (pressed == 2) {
 302                 repeat_delay++;
 303                 if (repeat_delay < REPEAT_DELAY)
 304                         return 0;
 305                 repeat_delay = REPEAT_DELAY;
 306         }
 307         keycode = 0;
 308         if ((scancode > 3) && (scancode <= 0x1d)) { /* alpha numeric values */
 309                 keycode = scancode - 4 + 0x61;
 310                 if (caps_lock)
 311                         /* switch to capital Letters */
 312                         keycode &= ~CAPITAL_MASK;
 313                 if (((modifier&(1 << LEFT_SHIFT)) != 0) ||
 314                         ((modifier&(1 << RIGHT_SHIFT)) != 0)) {
 315                         if (keycode & CAPITAL_MASK)
 316                                 /* switch to capital Letters */
 317                                 keycode &= ~CAPITAL_MASK;
 318                         else
 319                                 /* switch to non capital Letters */
 320                                 keycode |= CAPITAL_MASK;
 321                 }
 322         }
 323         if ((scancode > 0x1d) && (scancode < 0x3A)) {
 324                 if (((modifier&(1 << LEFT_SHIFT)) != 0) ||
 325                         ((modifier&(1 << RIGHT_SHIFT)) != 0))  /* shifted */
 326                         keycode = usb_kbd_numkey_shifted[scancode-0x1e];
 327                 else /* non shifted */
 328                         keycode = usb_kbd_numkey[scancode-0x1e];
 329         }
 330
 331         if (ctrl)
 332                 keycode = scancode - 0x3;
 333
 334         if (pressed == 1) {
 335                 if (scancode == NUM_LOCK) {
 336                         num_lock = ~num_lock;
 337                         return 1;
 338                 }
 339                 if (scancode == CAPS_LOCK) {
 340                         caps_lock = ~caps_lock;
 341                         return 1;
 342                 }
 343                 if (scancode == SCROLL_LOCK) {
 344                         scroll_lock = ~scroll_lock;
 345                         return 1;
 346                 }
 347         }
 348         if (keycode != 0) {
 349                 USB_KBD_PRINTF("%c", keycode);
 350                 usb_kbd_put_queue(keycode);
 351         }
 352         return 0;
 353 }
 354
 355 /* Interrupt service routine */
 356 static int usb_kbd_irq_worker(struct usb_device *dev)
 357 {
 358         int i, res;
 359
 360         res = 0;
 361
 362         switch (new[0]) {
 363         case 0x0:       /* No combo key pressed */
 364                 ctrl = 0;
 365                 break;
 366         case 0x01:      /* Left Ctrl pressed */
 367         case 0x10:      /* Right Ctrl pressed */
 368                 ctrl = 1;
 369                 break;
 370         }
 371
 372         for (i = 2; i < 8; i++) {
 373                 if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8])
 374                         res |= usb_kbd_translate(old[i], new[0], 0);
 375
 376                 if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8])
 377                         res |= usb_kbd_translate(new[i], new[0], 1);
 378         }
 379
 380         if ((new[2] > 3) && (old[2] == new[2])) /* still pressed */
 381                 res |= usb_kbd_translate(new[2], new[0], 2);
 382         if (res == 1)
 383                 usb_kbd_setled(dev);
 384
 385         memcpy(&old[0], &new[0], 8);
 386
 387         return 1; /* install IRQ Handler again */
 388 }
 389
 390 static int usb_kbd_irq(struct usb_device *dev)
 391 {
 392         if ((dev->irq_status != 0) || (dev->irq_act_len != 8)) {
 393                 USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",
 394                                 dev->irq_status, dev->irq_act_len);
 395                 return 1;
 396         }
 397
 398         return usb_kbd_irq_worker(dev);
 399 }
 400
 401 /* probes the USB device dev for keyboard type */
 402 static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
 403 {
 404         struct usb_interface *iface;
 405         struct usb_endpoint_descriptor *ep;
 406         int pipe, maxp;
 407
 408         if (dev->descriptor.bNumConfigurations != 1)
 409                 return 0;
 410         iface = &dev->config.if_desc[ifnum];
 411
 412         if (iface->desc.bInterfaceClass != 3)
 413                 return 0;
 414         if (iface->desc.bInterfaceSubClass != 1)
 415                 return 0;
 416         if (iface->desc.bInterfaceProtocol != 1)
 417                 return 0;
 418         if (iface->desc.bNumEndpoints != 1)
 419                 return 0;
 420
 421         ep = &iface->ep_desc[0];
 422
 423         if (!(ep->bEndpointAddress & 0x80))
 424                 return 0;
 425         if ((ep->bmAttributes & 3) != 3)
 426                 return 0;
 427         USB_KBD_PRINTF("USB KBD found set protocol...\n");
 428         /* ok, we found a USB Keyboard, install it */
 429         /* usb_kbd_get_hid_desc(dev); */
 430         usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
 431         USB_KBD_PRINTF("USB KBD found set idle...\n");
 432         usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
 433         memset(&new[0], 0, 8);
 434         memset(&old[0], 0, 8);
 435         repeat_delay = 0;
 436         pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
 437         maxp = usb_maxpacket(dev, pipe);
 438         dev->irq_handle = usb_kbd_irq;
 439         USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
 440         usb_submit_int_msg(dev, pipe, &new[0], maxp > 8 ? 8 : maxp,
 441                                 ep->bInterval);
 442         return 1;
 443 }
 444
 445
 446 #if 0
 447 struct usb_hid_descriptor {
 448         unsigned char  bLength;
 449         unsigned char  bDescriptorType; /* 0x21 for HID */
 450         unsigned short bcdHID; /* release number */
 451         unsigned char  bCountryCode;
 452         unsigned char  bNumDescriptors;
 453         unsigned char  bReportDescriptorType;
 454         unsigned short wDescriptorLength;
 455 } __packed;
 456
 457 /*
 458  * We parse each description item into this structure. Short items data
 459  * values are expanded to 32-bit signed int, long items contain a pointer
 460  * into the data area.
 461  */
 462
 463 struct hid_item {
 464         unsigned char format;
 465         unsigned char size;
 466         unsigned char type;
 467         unsigned char tag;
 468         union {
 469             unsigned char   u8;
 470             char            s8;
 471             unsigned short  u16;
 472             short           s16;
 473             unsigned long   u32;
 474             long            s32;
 475             unsigned char  *longdata;
 476         } data;
 477 };
 478
 479 /*
 480  * HID report item format
 481  */
 482
 483 #define HID_ITEM_FORMAT_SHORT   0
 484 #define HID_ITEM_FORMAT_LONG    1
 485
 486 /*
 487  * Special tag indicating long items
 488  */
 489
 490 #define HID_ITEM_TAG_LONG       15
 491
 492
 493 static struct usb_hid_descriptor usb_kbd_hid_desc;
 494
 495 void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
 496 {
 497         printf("USB_HID_DESC:\n");
 498         printf("  bLenght               0x%x\n", hid->bLength);
 499         printf("  bcdHID                0x%x\n", hid->bcdHID);
 500         printf("  bCountryCode          %d\n", hid->bCountryCode);
 501         printf("  bNumDescriptors       0x%x\n", hid->bNumDescriptors);
 502         printf("  bReportDescriptorType 0x%x\n", hid->bReportDescriptorType);
 503         printf("  wDescriptorLength     0x%x\n", hid->wDescriptorLength);
 504 }
 505
 506
 507 /*
 508  * Fetch a report description item from the data stream. We support long
 509  * items, though they are not used yet.
 510  */
 511
 512 static int fetch_item(unsigned char *start, unsigned char *end,
 513                         struct hid_item *item)
 514 {
 515         if ((end - start) > 0) {
 516                 unsigned char b = *start++;
 517                 item->type = (b >> 2) & 3;
 518                 item->tag  = (b >> 4) & 15;
 519                 if (item->tag == HID_ITEM_TAG_LONG) {
 520                         item->format = HID_ITEM_FORMAT_LONG;
 521                         if ((end - start) >= 2) {
 522                                 item->size = *start++;
 523                                 item->tag  = *start++;
 524                                 if ((end - start) >= item->size) {
 525                                         item->data.longdata = start;
 526                                         start += item->size;
 527                                         return item->size;
 528                                 }
 529                         }
 530                 } else {
 531                         item->format = HID_ITEM_FORMAT_SHORT;
 532                         item->size = b & 3;
 533                         switch (item->size) {
 534                         case 0:
 535                                 return item->size;
 536                         case 1:
 537                                 if ((end - start) >= 1) {
 538                                         item->data.u8 = *start++;
 539                                         return item->size;
 540                                 }
 541                                 break;
 542                         case 2:
 543                                 if ((end - start) >= 2) {
 544                                         item->data.u16 = le16_to_cpu(
 545                                                 (unsigned short *)start);
 546                                         start += 2;
 547                                         return item->size;
 548                                 }
 549                         case 3:
 550                                 item->size++;
 551                                 if ((end - start) >= 4) {
 552                                         item->data.u32 = le32_to_cpu(
 553                                                 (unsigned long *)start);
 554                                         start += 4;
 555                                         return item->size;
 556                                 }
 557                         }
 558                 }
 559         }
 560         return -1;
 561 }
 562
 563 /*
 564  * HID report descriptor item type (prefix bit 2, 3)
 565  */
 566
 567 #define HID_ITEM_TYPE_MAIN              0
 568 #define HID_ITEM_TYPE_GLOBAL            1
 569 #define HID_ITEM_TYPE_LOCAL             2
 570 #define HID_ITEM_TYPE_RESERVED          3
 571 /*
 572  * HID report descriptor main item tags
 573  */
 574
 575 #define HID_MAIN_ITEM_TAG_INPUT                 8
 576 #define HID_MAIN_ITEM_TAG_OUTPUT                9
 577 #define HID_MAIN_ITEM_TAG_FEATURE               11
 578 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION      10
 579 #define HID_MAIN_ITEM_TAG_END_COLLECTION        12
 580 /*
 581  * HID report descriptor main item contents
 582  */
 583
 584 #define HID_MAIN_ITEM_CONSTANT          0x001
 585 #define HID_MAIN_ITEM_VARIABLE          0x002
 586 #define HID_MAIN_ITEM_RELATIVE          0x004
 587 #define HID_MAIN_ITEM_WRAP              0x008
 588 #define HID_MAIN_ITEM_NONLINEAR         0x010
 589 #define HID_MAIN_ITEM_NO_PREFERRED      0x020
 590 #define HID_MAIN_ITEM_NULL_STATE        0x040
 591 #define HID_MAIN_ITEM_VOLATILE          0x080
 592 #define HID_MAIN_ITEM_BUFFERED_BYTE     0x100
 593
 594 /*
 595  * HID report descriptor collection item types
 596  */
 597
 598 #define HID_COLLECTION_PHYSICAL         0
 599 #define HID_COLLECTION_APPLICATION      1
 600 #define HID_COLLECTION_LOGICAL          2
 601 /*
 602  * HID report descriptor global item tags
 603  */
 604
 605 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE          0
 606 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM     1
 607 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM     2
 608 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM    3
 609 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM    4
 610 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT       5
 611 #define HID_GLOBAL_ITEM_TAG_UNIT                6
 612 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE         7
 613 #define HID_GLOBAL_ITEM_TAG_REPORT_ID           8
 614 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT        9
 615 #define HID_GLOBAL_ITEM_TAG_PUSH                10
 616 #define HID_GLOBAL_ITEM_TAG_POP                 11
 617
 618 /*
 619  * HID report descriptor local item tags
 620  */
 621
 622 #define HID_LOCAL_ITEM_TAG_USAGE                0
 623 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM        1
 624 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM        2
 625 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX     3
 626 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM   4
 627 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM   5
 628 #define HID_LOCAL_ITEM_TAG_STRING_INDEX         7
 629 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM       8
 630 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM       9
 631 #define HID_LOCAL_ITEM_TAG_DELIMITER            10
 632
 633
 634 static void usb_kbd_show_item(struct hid_item *item)
 635 {
 636         switch (item->type) {
 637         case HID_ITEM_TYPE_MAIN:
 638                 switch (item->tag) {
 639                 case HID_MAIN_ITEM_TAG_INPUT:
 640                         printf("Main Input");
 641                         break;
 642                 case HID_MAIN_ITEM_TAG_OUTPUT:
 643                         printf("Main Output");
 644                         break;
 645                 case HID_MAIN_ITEM_TAG_FEATURE:
 646                         printf("Main Feature");
 647                         break;
 648                 case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
 649                         printf("Main Begin Collection");
 650                         break;
 651                 case HID_MAIN_ITEM_TAG_END_COLLECTION:
 652                         printf("Main End Collection");
 653                         break;
 654                 default:
 655                         printf("Main reserved %d", item->tag);
 656                         break;
 657                 }
 658                 break;
 659         case HID_ITEM_TYPE_GLOBAL:
 660                 switch (item->tag) {
 661                 case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
 662                         printf("- Global Usage Page");
 663                         break;
 664                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
 665                         printf("- Global Logical Minimum");
 666                         break;
 667                 case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
 668                         printf("- Global Logical Maximum");
 669                         break;
 670                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
 671                         printf("- Global physical Minimum");
 672                         break;
 673                 case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
 674                         printf("- Global physical Maximum");
 675                         break;
 676                 case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
 677                         printf("- Global Unit Exponent");
 678                         break;
 679                 case HID_GLOBAL_ITEM_TAG_UNIT:
 680                         printf("- Global Unit");
 681                         break;
 682                 case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
 683                         printf("- Global Report Size");
 684                         break;
 685                 case HID_GLOBAL_ITEM_TAG_REPORT_ID:
 686                         printf("- Global Report ID");
 687                         break;
 688                 case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
 689                         printf("- Global Report Count");
 690                         break;
 691                 case HID_GLOBAL_ITEM_TAG_PUSH:
 692                         printf("- Global Push");
 693                         break;
 694                 case HID_GLOBAL_ITEM_TAG_POP:
 695                         printf("- Global Pop");
 696                         break;
 697                 default:
 698                         printf("- Global reserved %d", item->tag);
 699                         break;
 700                 }
 701                 break;
 702         case HID_ITEM_TYPE_LOCAL:
 703                 switch (item->tag) {
 704                 case HID_LOCAL_ITEM_TAG_USAGE:
 705                         printf("-- Local Usage");
 706                         break;
 707                 case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
 708                         printf("-- Local Usage Minimum");
 709                         break;
 710                 case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
 711                         printf("-- Local Usage Maximum");
 712                         break;
 713                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
 714                         printf("-- Local Designator Index");
 715                         break;
 716                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
 717                         printf("-- Local Designator Minimum");
 718                         break;
 719                 case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
 720                         printf("-- Local Designator Maximum");
 721                         break;
 722                 case HID_LOCAL_ITEM_TAG_STRING_INDEX:
 723                         printf("-- Local String Index");
 724                         break;
 725                 case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
 726                         printf("-- Local String Minimum");
 727                         break;
 728                 case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
 729                         printf("-- Local String Maximum");
 730                         break;
 731                 case HID_LOCAL_ITEM_TAG_DELIMITER:
 732                         printf("-- Local Delimiter");
 733                         break;
 734                 default:
 735                         printf("-- Local reserved %d", item->tag);
 736                         break;
 737                 }
 738                 break;
 739         default:
 740                 printf("--- reserved %d", item->type);
 741                 break;
 742         }
 743         switch (item->size) {
 744         case 1:
 745                 printf("  %d", item->data.u8);
 746                 break;
 747         case 2:
 748                 printf("  %d", item->data.u16);
 749                 break;
 750         case 4:
 751                 printf("  %ld", item->data.u32);
 752                 break;
 753         }
 754         printf("\n");
 755 }
 756
 757
 758 static int usb_kbd_get_hid_desc(struct usb_device *dev)
 759 {
 760         unsigned char buffer[256];
 761         struct usb_descriptor_header *head;
 762         struct usb_config_descriptor *config;
 763         int index, len, i;
 764         unsigned char *start, *end;
 765         struct hid_item item;
 766
 767         if (usb_get_configuration_no(dev, &buffer[0], 0) == -1)
 768                 return -1;
 769         head = (struct usb_descriptor_header *)&buffer[0];
 770         if (head->bDescriptorType != USB_DT_CONFIG) {
 771                 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
 772                                 head->bDescriptorType);
 773                 return -1;
 774         }
 775         index = head->bLength;
 776         config = (struct usb_config_descriptor *)&buffer[0];
 777         len = le16_to_cpu(config->wTotalLength);
 778         /*
 779          * Ok the first entry must be a configuration entry,
 780          * now process the others
 781          */
 782         head = (struct usb_descriptor_header *)&buffer[index];
 783         while (index+1 < len) {
 784                 if (head->bDescriptorType == USB_DT_HID) {
 785                         printf("HID desc found\n");
 786                         memcpy(&usb_kbd_hid_desc, &buffer[index],
 787                                         buffer[index]);
 788                         le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
 789                         le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
 790                         usb_kbd_display_hid(&usb_kbd_hid_desc);
 791                         len = 0;
 792                         break;
 793                 }
 794                 index += head->bLength;
 795                 head = (struct usb_descriptor_header *)&buffer[index];
 796         }
 797         if (len > 0)
 798                 return -1;
 799         len = usb_kbd_hid_desc.wDescriptorLength;
 800         index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0],
 801                                                 len);
 802         if (index < 0) {
 803                 printf("reading report descriptor failed\n");
 804                 return -1;
 805         }
 806         printf(" report descriptor (size %u, read %d)\n", len, index);
 807         start = &buffer[0];
 808         end = &buffer[len];
 809         i = 0;
 810         do {
 811                 index = fetch_item(start, end, &item);
 812                 i += index;
 813                 i++;
 814                 if (index >= 0)
 815                         usb_kbd_show_item(&item);
 816
 817                 start += index;
 818                 start++;
 819         } while (index >= 0);
 820
 821 }
 822
 823 #endif