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