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