xref: /openbmc/u-boot/common/usb_kbd.c (revision 6d8962e8)
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 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 	struct stdio_dev 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 = stdio_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(struct stdio_dev));
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 = stdio_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_STDIO_DEREGISTER
216 	return stdio_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 *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->desc.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 *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->desc.bInterfaceClass != 3)
359 		return 0;
360 	if (iface->desc.bInterfaceSubClass != 1)
361 		return 0;
362 	if (iface->desc.bInterfaceProtocol != 1)
363 		return 0;
364 	if (iface->desc.bNumEndpoints != 1)
365 		return 0;
366 
367 	ep = &iface->ep_desc[0];
368 
369 	if (!(ep->bEndpointAddress & 0x80)) return 0;
370 	if ((ep->bmAttributes & 3) != 3) return 0;
371 	USB_KBD_PRINTF("USB KBD found set protocol...\n");
372 	/* ok, we found a USB Keyboard, install it */
373 	/* usb_kbd_get_hid_desc(dev); */
374 	usb_set_protocol(dev, iface->desc.bInterfaceNumber, 0);
375 	USB_KBD_PRINTF("USB KBD found set idle...\n");
376 	usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
377 	memset(&new[0], 0, 8);
378 	memset(&old[0], 0, 8);
379 	repeat_delay=0;
380 	pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
381 	maxp = usb_maxpacket(dev, pipe);
382 	dev->irq_handle=usb_kbd_irq;
383 	USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
384 	usb_submit_int_msg(dev,pipe,&new[0], maxp > 8 ? 8 : maxp,ep->bInterval);
385 	return 1;
386 }
387 
388 
389 #if 0
390 struct usb_hid_descriptor {
391 	unsigned char  bLength;
392 	unsigned char  bDescriptorType; /* 0x21 for HID */
393 	unsigned short bcdHID; /* release number */
394 	unsigned char  bCountryCode;
395 	unsigned char  bNumDescriptors;
396 	unsigned char  bReportDescriptorType;
397 	unsigned short wDescriptorLength;
398 } __attribute__ ((packed));
399 
400 /*
401  * We parse each description item into this structure. Short items data
402  * values are expanded to 32-bit signed int, long items contain a pointer
403  * into the data area.
404  */
405 
406 struct hid_item {
407 	unsigned char format;
408 	unsigned char size;
409 	unsigned char type;
410 	unsigned char tag;
411 	union {
412 	    unsigned char   u8;
413 	    char            s8;
414 	    unsigned short  u16;
415 	    short           s16;
416 	    unsigned long   u32;
417 	    long            s32;
418 	    unsigned char  *longdata;
419 	} data;
420 };
421 
422 /*
423  * HID report item format
424  */
425 
426 #define HID_ITEM_FORMAT_SHORT	0
427 #define HID_ITEM_FORMAT_LONG	1
428 
429 /*
430  * Special tag indicating long items
431  */
432 
433 #define HID_ITEM_TAG_LONG	15
434 
435 
436 static struct usb_hid_descriptor usb_kbd_hid_desc;
437 
438 void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
439 {
440 	printf("USB_HID_DESC:\n");
441 	printf("  bLenght               0x%x\n",hid->bLength);
442 	printf("  bcdHID                0x%x\n",hid->bcdHID);
443 	printf("  bCountryCode          %d\n",hid->bCountryCode);
444 	printf("  bNumDescriptors       0x%x\n",hid->bNumDescriptors);
445 	printf("  bReportDescriptorType 0x%x\n",hid->bReportDescriptorType);
446 	printf("  wDescriptorLength     0x%x\n",hid->wDescriptorLength);
447 }
448 
449 
450 /*
451  * Fetch a report description item from the data stream. We support long
452  * items, though they are not used yet.
453  */
454 
455 static int fetch_item(unsigned char *start,unsigned char *end, struct hid_item *item)
456 {
457 	if((end - start) > 0) {
458 		unsigned char b = *start++;
459 		item->type = (b >> 2) & 3;
460 		item->tag  = (b >> 4) & 15;
461 		if (item->tag == HID_ITEM_TAG_LONG) {
462 			item->format = HID_ITEM_FORMAT_LONG;
463 			if ((end - start) >= 2) {
464 				item->size = *start++;
465 				item->tag  = *start++;
466 				if ((end - start) >= item->size) {
467 					item->data.longdata = start;
468 					start += item->size;
469 					return item->size;
470 				}
471 			}
472 		} else {
473 			item->format = HID_ITEM_FORMAT_SHORT;
474 			item->size = b & 3;
475 			switch (item->size) {
476 				case 0:
477 					return item->size;
478 				case 1:
479 					if ((end - start) >= 1) {
480 						item->data.u8 = *start++;
481 						return item->size;
482 					}
483 					break;
484 				case 2:
485 					if ((end - start) >= 2) {
486 						item->data.u16 = le16_to_cpu((unsigned short *)start);
487 						start+=2;
488 						return item->size;
489 					}
490 				case 3:
491 					item->size++;
492 					if ((end - start) >= 4) {
493 						item->data.u32 = le32_to_cpu((unsigned long *)start);
494 						start+=4;
495 						return item->size;
496 					}
497 			}
498 		}
499 	}
500 	return -1;
501 }
502 
503 /*
504  * HID report descriptor item type (prefix bit 2,3)
505  */
506 
507 #define HID_ITEM_TYPE_MAIN		0
508 #define HID_ITEM_TYPE_GLOBAL		1
509 #define HID_ITEM_TYPE_LOCAL		2
510 #define HID_ITEM_TYPE_RESERVED		3
511 /*
512  * HID report descriptor main item tags
513  */
514 
515 #define HID_MAIN_ITEM_TAG_INPUT			8
516 #define HID_MAIN_ITEM_TAG_OUTPUT		9
517 #define HID_MAIN_ITEM_TAG_FEATURE		11
518 #define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION	10
519 #define HID_MAIN_ITEM_TAG_END_COLLECTION	12
520 /*
521  * HID report descriptor main item contents
522  */
523 
524 #define HID_MAIN_ITEM_CONSTANT		0x001
525 #define HID_MAIN_ITEM_VARIABLE		0x002
526 #define HID_MAIN_ITEM_RELATIVE		0x004
527 #define HID_MAIN_ITEM_WRAP		0x008
528 #define HID_MAIN_ITEM_NONLINEAR		0x010
529 #define HID_MAIN_ITEM_NO_PREFERRED	0x020
530 #define HID_MAIN_ITEM_NULL_STATE	0x040
531 #define HID_MAIN_ITEM_VOLATILE		0x080
532 #define HID_MAIN_ITEM_BUFFERED_BYTE	0x100
533 
534 /*
535  * HID report descriptor collection item types
536  */
537 
538 #define HID_COLLECTION_PHYSICAL		0
539 #define HID_COLLECTION_APPLICATION	1
540 #define HID_COLLECTION_LOGICAL		2
541 /*
542  * HID report descriptor global item tags
543  */
544 
545 #define HID_GLOBAL_ITEM_TAG_USAGE_PAGE		0
546 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM	1
547 #define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM	2
548 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM	3
549 #define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM	4
550 #define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT	5
551 #define HID_GLOBAL_ITEM_TAG_UNIT		6
552 #define HID_GLOBAL_ITEM_TAG_REPORT_SIZE		7
553 #define HID_GLOBAL_ITEM_TAG_REPORT_ID		8
554 #define HID_GLOBAL_ITEM_TAG_REPORT_COUNT	9
555 #define HID_GLOBAL_ITEM_TAG_PUSH		10
556 #define HID_GLOBAL_ITEM_TAG_POP			11
557 
558 /*
559  * HID report descriptor local item tags
560  */
561 
562 #define HID_LOCAL_ITEM_TAG_USAGE		0
563 #define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM	1
564 #define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM	2
565 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX	3
566 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM	4
567 #define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM	5
568 #define HID_LOCAL_ITEM_TAG_STRING_INDEX		7
569 #define HID_LOCAL_ITEM_TAG_STRING_MINIMUM	8
570 #define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM	9
571 #define HID_LOCAL_ITEM_TAG_DELIMITER		10
572 
573 
574 static void usb_kbd_show_item(struct hid_item *item)
575 {
576 	switch(item->type) {
577 		case HID_ITEM_TYPE_MAIN:
578 			switch(item->tag) {
579 				case HID_MAIN_ITEM_TAG_INPUT:
580 					printf("Main Input");
581 					break;
582 				case HID_MAIN_ITEM_TAG_OUTPUT:
583 					printf("Main Output");
584 					break;
585 				case HID_MAIN_ITEM_TAG_FEATURE:
586 					printf("Main Feature");
587 					break;
588 				case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
589 					printf("Main Begin Collection");
590 					break;
591 				case HID_MAIN_ITEM_TAG_END_COLLECTION:
592 					printf("Main End Collection");
593 					break;
594 				default:
595 					printf("Main reserved %d",item->tag);
596 					break;
597 			}
598 			break;
599 		case HID_ITEM_TYPE_GLOBAL:
600 			switch(item->tag) {
601 				case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
602 					printf("- Global Usage Page");
603 					break;
604 				case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
605 					printf("- Global Logical Minimum");
606 					break;
607 				case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
608 					printf("- Global Logical Maximum");
609 					break;
610 				case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
611 					printf("- Global physical Minimum");
612 					break;
613 				case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
614 					printf("- Global physical Maximum");
615 					break;
616 				case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
617 					printf("- Global Unit Exponent");
618 					break;
619 				case HID_GLOBAL_ITEM_TAG_UNIT:
620 					printf("- Global Unit");
621 					break;
622 				case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
623 					printf("- Global Report Size");
624 					break;
625 				case HID_GLOBAL_ITEM_TAG_REPORT_ID:
626 					printf("- Global Report ID");
627 					break;
628 				case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
629 					printf("- Global Report Count");
630 					break;
631 				case HID_GLOBAL_ITEM_TAG_PUSH:
632 					printf("- Global Push");
633 					break;
634 				case HID_GLOBAL_ITEM_TAG_POP:
635 					printf("- Global Pop");
636 					break;
637 				default:
638 					printf("- Global reserved %d",item->tag);
639 					break;
640 			}
641 			break;
642 		case HID_ITEM_TYPE_LOCAL:
643 			switch(item->tag) {
644 				case HID_LOCAL_ITEM_TAG_USAGE:
645 					printf("-- Local Usage");
646 					break;
647 				case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
648 					printf("-- Local Usage Minimum");
649 					break;
650 				case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
651 					printf("-- Local Usage Maximum");
652 					break;
653 				case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
654 					printf("-- Local Designator Index");
655 					break;
656 				case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
657 					printf("-- Local Designator Minimum");
658 					break;
659 				case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
660 					printf("-- Local Designator Maximum");
661 					break;
662 				case HID_LOCAL_ITEM_TAG_STRING_INDEX:
663 					printf("-- Local String Index");
664 					break;
665 				case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
666 					printf("-- Local String Minimum");
667 					break;
668 				case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
669 					printf("-- Local String Maximum");
670 					break;
671 				case HID_LOCAL_ITEM_TAG_DELIMITER:
672 					printf("-- Local Delimiter");
673 					break;
674 				default:
675 					printf("-- Local reserved %d",item->tag);
676 					break;
677 			}
678 			break;
679 		default:
680 			printf("--- reserved %d",item->type);
681 			break;
682 	}
683 	switch(item->size) {
684 		case 1:
685 			printf("  %d",item->data.u8);
686 			break;
687 		case 2:
688 			printf("  %d",item->data.u16);
689 			break;
690 		case 4:
691 			printf("  %ld",item->data.u32);
692 			break;
693 	}
694 	printf("\n");
695 }
696 
697 
698 static int usb_kbd_get_hid_desc(struct usb_device *dev)
699 {
700 	unsigned char buffer[256];
701 	struct usb_descriptor_header *head;
702 	struct usb_config_descriptor *config;
703 	int index,len,i;
704 	unsigned char *start, *end;
705 	struct hid_item item;
706 
707 	if(usb_get_configuration_no(dev,&buffer[0],0)==-1)
708 		return -1;
709 	head =(struct usb_descriptor_header *)&buffer[0];
710 	if(head->bDescriptorType!=USB_DT_CONFIG) {
711 		printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
712 		return -1;
713 	}
714 	index=head->bLength;
715 	config=(struct usb_config_descriptor *)&buffer[0];
716 	len=le16_to_cpu(config->wTotalLength);
717 	/* Ok the first entry must be a configuration entry, now process the others */
718 	head=(struct usb_descriptor_header *)&buffer[index];
719 	while(index+1 < len) {
720 		if(head->bDescriptorType==USB_DT_HID) {
721 			printf("HID desc found\n");
722 			memcpy(&usb_kbd_hid_desc,&buffer[index],buffer[index]);
723 			le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
724 			le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
725 			usb_kbd_display_hid(&usb_kbd_hid_desc);
726 			len=0;
727 			break;
728 		}
729 		index+=head->bLength;
730 		head=(struct usb_descriptor_header *)&buffer[index];
731 	}
732 	if(len>0)
733 		return -1;
734 	len=usb_kbd_hid_desc.wDescriptorLength;
735 	if((index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0], len)) < 0) {
736 		printf("reading report descriptor failed\n");
737 		return -1;
738 	}
739 	printf(" report descriptor (size %u, read %d)\n", len, index);
740 	start = &buffer[0];
741 	end = &buffer[len];
742 	i=0;
743 	do {
744 		index=fetch_item(start,end,&item);
745 		i+=index;
746 		i++;
747 		if(index>=0)
748 			usb_kbd_show_item(&item);
749 
750 		start+=index;
751 		start++;
752 	} while(index>=0);
753 
754 }
755 
756 #endif
757