[people/ms/u-boot.git] / common / usb_kbd.c

/*
 * (C) Copyright 2001
 * Denis Peter, MPL AG Switzerland
 *
 * Part of this source has been derived from the Linux USB
 * project.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */
#include <common.h>
#include <devices.h>
#include <asm/byteorder.h>

#include <usb.h>

#undef USB_KBD_DEBUG
/*
 * if overwrite_console returns 1, the stdin, stderr and stdout
 * are switched to the serial port, else the settings in the
 * environment are used
 */
#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
extern int overwrite_console (void);
#else
int overwrite_console (void)
{
	return (0);
}
#endif

#ifdef	USB_KBD_DEBUG
#define	USB_KBD_PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define USB_KBD_PRINTF(fmt,args...)
#endif


#define REPEAT_RATE  40/4 /* 40msec -> 25cps */
#define REPEAT_DELAY 10 /* 10 x REAPEAT_RATE = 400msec */

#define NUM_LOCK	0x53
#define CAPS_LOCK 0x39
#define SCROLL_LOCK 0x47


/* Modifier bits */
#define LEFT_CNTR		0
#define LEFT_SHIFT	1
#define LEFT_ALT		2
#define LEFT_GUI		3
#define RIGHT_CNTR	4
#define RIGHT_SHIFT	5
#define RIGHT_ALT		6
#define RIGHT_GUI		7

#define USB_KBD_BUFFER_LEN 0x20  /* size of the keyboardbuffer */

static volatile char usb_kbd_buffer[USB_KBD_BUFFER_LEN];
static volatile int usb_in_pointer = 0;
static volatile int usb_out_pointer = 0;

unsigned char new[8];
unsigned char old[8];
int repeat_delay;
#define DEVNAME "usbkbd"
static unsigned char num_lock = 0;
static unsigned char caps_lock = 0;
static unsigned char scroll_lock = 0;
static unsigned char ctrl = 0;

static unsigned char leds __attribute__ ((aligned (0x4)));

static unsigned char usb_kbd_numkey[] = {
	 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0','\r',0x1b,'\b','\t',' ', '-',
	 '=', '[', ']','\\', '#', ';', '\'', '`', ',', '.', '/'
};
static unsigned char usb_kbd_numkey_shifted[] = {
	 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')','\r',0x1b,'\b','\t',' ', '_',
	 '+', '{', '}', '|', '~', ':', '"', '~', '<', '>', '?'
};

/******************************************************************
 * Queue handling
 ******************************************************************/
/* puts character in the queue and sets up the in and out pointer */
static void usb_kbd_put_queue(char data)
{
	if((usb_in_pointer+1)==USB_KBD_BUFFER_LEN) {
		if(usb_out_pointer==0) {
			return; /* buffer full */
		} else{
			usb_in_pointer=0;
		}
	} else {
		if((usb_in_pointer+1)==usb_out_pointer)
			return; /* buffer full */
		usb_in_pointer++;
	}
	usb_kbd_buffer[usb_in_pointer]=data;
	return;
}

/* test if a character is in the queue */
static int usb_kbd_testc(void)
{
#ifdef CONFIG_SYS_USB_EVENT_POLL
	usb_event_poll();
#endif
	if(usb_in_pointer==usb_out_pointer)
		return(0); /* no data */
	else
		return(1);
}
/* gets the character from the queue */
static int usb_kbd_getc(void)
{
	char c;
	while(usb_in_pointer==usb_out_pointer) {
#ifdef CONFIG_SYS_USB_EVENT_POLL
		usb_event_poll();
#endif
	}
	if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN)
		usb_out_pointer=0;
	else
		usb_out_pointer++;
	c=usb_kbd_buffer[usb_out_pointer];
	return (int)c;

}

/* forward decleration */
static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum);

/* search for keyboard and register it if found */
int drv_usb_kbd_init(void)
{
	int error,i;
	device_t usb_kbd_dev,*old_dev;
	struct usb_device *dev;
	char *stdinname  = getenv ("stdin");

	usb_in_pointer=0;
	usb_out_pointer=0;
	/* scan all USB Devices */
	for(i=0;i<USB_MAX_DEVICE;i++) {
		dev=usb_get_dev_index(i); /* get device */
		if(dev == NULL)
			return -1;
		if(dev->devnum!=-1) {
			if(usb_kbd_probe(dev,0)==1) { /* Ok, we found a keyboard */
				/* check, if it is already registered */
				USB_KBD_PRINTF("USB KBD found set up device.\n");
				old_dev = device_get_by_name(DEVNAME);
				if(old_dev) {
					/* ok, already registered, just return ok */
					USB_KBD_PRINTF("USB KBD is already registered.\n");
					return 1;
				}
				/* register the keyboard */
				USB_KBD_PRINTF("USB KBD register.\n");
				memset (&usb_kbd_dev, 0, sizeof(device_t));
				strcpy(usb_kbd_dev.name, DEVNAME);
				usb_kbd_dev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
				usb_kbd_dev.putc = NULL;
				usb_kbd_dev.puts = NULL;
				usb_kbd_dev.getc = usb_kbd_getc;
				usb_kbd_dev.tstc = usb_kbd_testc;
				usb_kbd_dev.priv = (void *)dev;
				error = device_register (&usb_kbd_dev);
				if(error==0) {
					/* check if this is the standard input device */
					if(strcmp(stdinname,DEVNAME)==0) {
						/* reassign the console */
						if(overwrite_console()) {
							return 1;
						}
						error=console_assign(stdin,DEVNAME);
						if(error==0)
							return 1;
						else
							return error;
					}
					return 1;
				}
				return error;
			}
		}
	}
	/* no USB Keyboard found */
	return -1;
}


/* deregistering the keyboard */
int usb_kbd_deregister(void)
{
#ifdef CONFIG_SYS_DEVICE_DEREGISTER
	return device_deregister(DEVNAME);
#else
	return 1;
#endif
}

/**************************************************************************
 * Low Level drivers
 */

/* set the LEDs. Since this is used in the irq routine, the control job
   is issued with a timeout of 0. This means, that the job is queued without
   waiting for job completion */

static void usb_kbd_setled(struct usb_device *dev)
{
	struct usb_interface_descriptor *iface;
	iface = &dev->config.if_desc[0];
	leds=0;
	if(scroll_lock!=0)
		leds|=1;
	leds<<=1;
	if(caps_lock!=0)
		leds|=1;
	leds<<=1;
	if(num_lock!=0)
		leds|=1;
	usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
		USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
		0x200, iface->bInterfaceNumber,(void *)&leds, 1, 0);

}


#define CAPITAL_MASK 0x20
/* Translate the scancode in ASCII */
static int usb_kbd_translate(unsigned char scancode,unsigned char modifier,int pressed)
{
	unsigned char keycode;

	if(pressed==0) {
		/* key released */
		repeat_delay=0;
		return 0;
	}
	if(pressed==2) {
		repeat_delay++;
		if(repeat_delay<REPEAT_DELAY)
			return 0;
		repeat_delay=REPEAT_DELAY;
	}
	keycode=0;
	if((scancode>3) && (scancode<=0x1d)) { /* alpha numeric values */
		keycode=scancode-4 + 0x61;
		if(caps_lock)
			keycode&=~CAPITAL_MASK; /* switch to capital Letters */
		if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0)) {
			if(keycode & CAPITAL_MASK)
				keycode&=~CAPITAL_MASK; /* switch to capital Letters */
			else
				keycode|=CAPITAL_MASK; /* switch to non capital Letters */
		}
	}
	if((scancode>0x1d) && (scancode<0x3A)) {
		if(((modifier&(1<<LEFT_SHIFT))!=0)||((modifier&(1<<RIGHT_SHIFT))!=0))  /* shifted */
			keycode=usb_kbd_numkey_shifted[scancode-0x1e];
		else /* non shifted */
			keycode=usb_kbd_numkey[scancode-0x1e];
	}

	if (ctrl)
		keycode = scancode - 0x3;

	if(pressed==1) {
		if(scancode==NUM_LOCK) {
			num_lock=~num_lock;
			return 1;
		}
		if(scancode==CAPS_LOCK) {
			caps_lock=~caps_lock;
			return 1;
		}
		if(scancode==SCROLL_LOCK) {
			scroll_lock=~scroll_lock;
			return 1;
		}
	}
	if(keycode!=0) {
		USB_KBD_PRINTF("%c",keycode);
		usb_kbd_put_queue(keycode);
	}
	return 0;
}

/* Interrupt service routine */
static int usb_kbd_irq(struct usb_device *dev)
{
	int i,res;

	if((dev->irq_status!=0)||(dev->irq_act_len!=8))
	{
		USB_KBD_PRINTF("usb_keyboard Error %lX, len %d\n",dev->irq_status,dev->irq_act_len);
		return 1;
	}
	res=0;

	switch (new[0]) {
	case 0x0:	/* No combo key pressed */
		ctrl = 0;
		break;
	case 0x01:	/* Left Ctrl pressed */
	case 0x10:	/* Right Ctrl pressed */
		ctrl = 1;
		break;
	}

	for (i = 2; i < 8; i++) {
		if (old[i] > 3 && memscan(&new[2], old[i], 6) == &new[8]) {
			res|=usb_kbd_translate(old[i],new[0],0);
		}
		if (new[i] > 3 && memscan(&old[2], new[i], 6) == &old[8]) {
			res|=usb_kbd_translate(new[i],new[0],1);
		}
	}
	if((new[2]>3) && (old[2]==new[2])) /* still pressed */
		res|=usb_kbd_translate(new[2],new[0],2);
	if(res==1)
		usb_kbd_setled(dev);
	memcpy(&old[0],&new[0], 8);
	return 1; /* install IRQ Handler again */
}

/* probes the USB device dev for keyboard type */
static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
{
	struct usb_interface_descriptor *iface;
	struct usb_endpoint_descriptor *ep;
	int pipe,maxp;

	if (dev->descriptor.bNumConfigurations != 1) return 0;
	iface = &dev->config.if_desc[ifnum];

	if (iface->bInterfaceClass != 3) return 0;
	if (iface->bInterfaceSubClass != 1) return 0;
	if (iface->bInterfaceProtocol != 1) return 0;
	if (iface->bNumEndpoints != 1) return 0;

	ep = &iface->ep_desc[0];

	if (!(ep->bEndpointAddress & 0x80)) return 0;
	if ((ep->bmAttributes & 3) != 3) return 0;
	USB_KBD_PRINTF("USB KBD found set protocol...\n");
	/* ok, we found a USB Keyboard, install it */
	/* usb_kbd_get_hid_desc(dev); */
	usb_set_protocol(dev, iface->bInterfaceNumber, 0);
	USB_KBD_PRINTF("USB KBD found set idle...\n");
	usb_set_idle(dev, iface->bInterfaceNumber, REPEAT_RATE, 0);
	memset(&new[0], 0, 8);
	memset(&old[0], 0, 8);
	repeat_delay=0;
	pipe = usb_rcvintpipe(dev, ep->bEndpointAddress);
	maxp = usb_maxpacket(dev, pipe);
	dev->irq_handle=usb_kbd_irq;
	USB_KBD_PRINTF("USB KBD enable interrupt pipe...\n");
	usb_submit_int_msg(dev,pipe,&new[0], maxp > 8 ? 8 : maxp,ep->bInterval);
	return 1;
}


#if 0
struct usb_hid_descriptor {
	unsigned char  bLength;
	unsigned char  bDescriptorType; /* 0x21 for HID */
	unsigned short bcdHID; /* release number */
	unsigned char  bCountryCode;
	unsigned char  bNumDescriptors;
	unsigned char  bReportDescriptorType;
	unsigned short wDescriptorLength;
} __attribute__ ((packed));

/*
 * We parse each description item into this structure. Short items data
 * values are expanded to 32-bit signed int, long items contain a pointer
 * into the data area.
 */

struct hid_item {
	unsigned char format;
	unsigned char size;
	unsigned char type;
	unsigned char tag;
	union {
	    unsigned char   u8;
	    char            s8;
	    unsigned short  u16;
	    short           s16;
	    unsigned long   u32;
	    long            s32;
	    unsigned char  *longdata;
	} data;
};

/*
 * HID report item format
 */

#define HID_ITEM_FORMAT_SHORT	0
#define HID_ITEM_FORMAT_LONG	1

/*
 * Special tag indicating long items
 */

#define HID_ITEM_TAG_LONG	15


static struct usb_hid_descriptor usb_kbd_hid_desc;

void usb_kbd_display_hid(struct usb_hid_descriptor *hid)
{
	printf("USB_HID_DESC:\n");
	printf("  bLenght               0x%x\n",hid->bLength);
	printf("  bcdHID                0x%x\n",hid->bcdHID);
	printf("  bCountryCode          %d\n",hid->bCountryCode);
	printf("  bNumDescriptors       0x%x\n",hid->bNumDescriptors);
	printf("  bReportDescriptorType 0x%x\n",hid->bReportDescriptorType);
	printf("  wDescriptorLength     0x%x\n",hid->wDescriptorLength);
}


/*
 * Fetch a report description item from the data stream. We support long
 * items, though they are not used yet.
 */

static int fetch_item(unsigned char *start,unsigned char *end, struct hid_item *item)
{
	if((end - start) > 0) {
		unsigned char b = *start++;
		item->type = (b >> 2) & 3;
		item->tag  = (b >> 4) & 15;
		if (item->tag == HID_ITEM_TAG_LONG) {
			item->format = HID_ITEM_FORMAT_LONG;
			if ((end - start) >= 2) {
				item->size = *start++;
				item->tag  = *start++;
				if ((end - start) >= item->size) {
					item->data.longdata = start;
					start += item->size;
					return item->size;
				}
			}
		} else {
			item->format = HID_ITEM_FORMAT_SHORT;
			item->size = b & 3;
			switch (item->size) {
				case 0:
					return item->size;
				case 1:
					if ((end - start) >= 1) {
						item->data.u8 = *start++;
						return item->size;
					}
					break;
				case 2:
					if ((end - start) >= 2) {
						item->data.u16 = le16_to_cpu((unsigned short *)start);
						start+=2;
						return item->size;
					}
				case 3:
					item->size++;
					if ((end - start) >= 4) {
						item->data.u32 = le32_to_cpu((unsigned long *)start);
						start+=4;
						return item->size;
					}
			}
		}
	}
	return -1;
}

/*
 * HID report descriptor item type (prefix bit 2,3)
 */

#define HID_ITEM_TYPE_MAIN		0
#define HID_ITEM_TYPE_GLOBAL		1
#define HID_ITEM_TYPE_LOCAL		2
#define HID_ITEM_TYPE_RESERVED		3
/*
 * HID report descriptor main item tags
 */

#define HID_MAIN_ITEM_TAG_INPUT			8
#define HID_MAIN_ITEM_TAG_OUTPUT		9
#define HID_MAIN_ITEM_TAG_FEATURE		11
#define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION	10
#define HID_MAIN_ITEM_TAG_END_COLLECTION	12
/*
 * HID report descriptor main item contents
 */

#define HID_MAIN_ITEM_CONSTANT		0x001
#define HID_MAIN_ITEM_VARIABLE		0x002
#define HID_MAIN_ITEM_RELATIVE		0x004
#define HID_MAIN_ITEM_WRAP		0x008
#define HID_MAIN_ITEM_NONLINEAR		0x010
#define HID_MAIN_ITEM_NO_PREFERRED	0x020
#define HID_MAIN_ITEM_NULL_STATE	0x040
#define HID_MAIN_ITEM_VOLATILE		0x080
#define HID_MAIN_ITEM_BUFFERED_BYTE	0x100

/*
 * HID report descriptor collection item types
 */

#define HID_COLLECTION_PHYSICAL		0
#define HID_COLLECTION_APPLICATION	1
#define HID_COLLECTION_LOGICAL		2
/*
 * HID report descriptor global item tags
 */

#define HID_GLOBAL_ITEM_TAG_USAGE_PAGE		0
#define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM	1
#define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM	2
#define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM	3
#define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM	4
#define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT	5
#define HID_GLOBAL_ITEM_TAG_UNIT		6
#define HID_GLOBAL_ITEM_TAG_REPORT_SIZE		7
#define HID_GLOBAL_ITEM_TAG_REPORT_ID		8
#define HID_GLOBAL_ITEM_TAG_REPORT_COUNT	9
#define HID_GLOBAL_ITEM_TAG_PUSH		10
#define HID_GLOBAL_ITEM_TAG_POP			11

/*
 * HID report descriptor local item tags
 */

#define HID_LOCAL_ITEM_TAG_USAGE		0
#define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM	1
#define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM	2
#define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX	3
#define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM	4
#define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM	5
#define HID_LOCAL_ITEM_TAG_STRING_INDEX		7
#define HID_LOCAL_ITEM_TAG_STRING_MINIMUM	8
#define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM	9
#define HID_LOCAL_ITEM_TAG_DELIMITER		10


static void usb_kbd_show_item(struct hid_item *item)
{
	switch(item->type) {
		case HID_ITEM_TYPE_MAIN:
			switch(item->tag) {
				case HID_MAIN_ITEM_TAG_INPUT:
					printf("Main Input");
					break;
				case HID_MAIN_ITEM_TAG_OUTPUT:
					printf("Main Output");
					break;
				case HID_MAIN_ITEM_TAG_FEATURE:
					printf("Main Feature");
					break;
				case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION:
					printf("Main Begin Collection");
					break;
				case HID_MAIN_ITEM_TAG_END_COLLECTION:
					printf("Main End Collection");
					break;
				default:
					printf("Main reserved %d",item->tag);
					break;
			}
			break;
		case HID_ITEM_TYPE_GLOBAL:
			switch(item->tag) {
				case HID_GLOBAL_ITEM_TAG_USAGE_PAGE:
					printf("- Global Usage Page");
					break;
				case HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM:
					printf("- Global Logical Minimum");
					break;
				case HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM:
					printf("- Global Logical Maximum");
					break;
				case HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM:
					printf("- Global physical Minimum");
					break;
				case HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM:
					printf("- Global physical Maximum");
					break;
				case HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT:
					printf("- Global Unit Exponent");
					break;
				case HID_GLOBAL_ITEM_TAG_UNIT:
					printf("- Global Unit");
					break;
				case HID_GLOBAL_ITEM_TAG_REPORT_SIZE:
					printf("- Global Report Size");
					break;
				case HID_GLOBAL_ITEM_TAG_REPORT_ID:
					printf("- Global Report ID");
					break;
				case HID_GLOBAL_ITEM_TAG_REPORT_COUNT:
					printf("- Global Report Count");
					break;
				case HID_GLOBAL_ITEM_TAG_PUSH:
					printf("- Global Push");
					break;
				case HID_GLOBAL_ITEM_TAG_POP:
					printf("- Global Pop");
					break;
				default:
					printf("- Global reserved %d",item->tag);
					break;
			}
			break;
		case HID_ITEM_TYPE_LOCAL:
			switch(item->tag) {
				case HID_LOCAL_ITEM_TAG_USAGE:
					printf("-- Local Usage");
					break;
				case HID_LOCAL_ITEM_TAG_USAGE_MINIMUM:
					printf("-- Local Usage Minimum");
					break;
				case HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM:
					printf("-- Local Usage Maximum");
					break;
				case HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX:
					printf("-- Local Designator Index");
					break;
				case HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM:
					printf("-- Local Designator Minimum");
					break;
				case HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM:
					printf("-- Local Designator Maximum");
					break;
				case HID_LOCAL_ITEM_TAG_STRING_INDEX:
					printf("-- Local String Index");
					break;
				case HID_LOCAL_ITEM_TAG_STRING_MINIMUM:
					printf("-- Local String Minimum");
					break;
				case HID_LOCAL_ITEM_TAG_STRING_MAXIMUM:
					printf("-- Local String Maximum");
					break;
				case HID_LOCAL_ITEM_TAG_DELIMITER:
					printf("-- Local Delimiter");
					break;
				default:
					printf("-- Local reserved %d",item->tag);
					break;
			}
			break;
		default:
			printf("--- reserved %d",item->type);
			break;
	}
	switch(item->size) {
		case 1:
			printf("  %d",item->data.u8);
			break;
		case 2:
			printf("  %d",item->data.u16);
			break;
		case 4:
			printf("  %ld",item->data.u32);
			break;
	}
	printf("\n");
}


static int usb_kbd_get_hid_desc(struct usb_device *dev)
{
	unsigned char buffer[256];
	struct usb_descriptor_header *head;
	struct usb_config_descriptor *config;
	int index,len,i;
	unsigned char *start, *end;
	struct hid_item item;

	if(usb_get_configuration_no(dev,&buffer[0],0)==-1)
		return -1;
	head =(struct usb_descriptor_header *)&buffer[0];
	if(head->bDescriptorType!=USB_DT_CONFIG) {
		printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
		return -1;
	}
	index=head->bLength;
	config=(struct usb_config_descriptor *)&buffer[0];
	len=le16_to_cpu(config->wTotalLength);
	/* Ok the first entry must be a configuration entry, now process the others */
	head=(struct usb_descriptor_header *)&buffer[index];
	while(index+1 < len) {
		if(head->bDescriptorType==USB_DT_HID) {
			printf("HID desc found\n");
			memcpy(&usb_kbd_hid_desc,&buffer[index],buffer[index]);
			le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
			le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
			usb_kbd_display_hid(&usb_kbd_hid_desc);
			len=0;
			break;
		}
		index+=head->bLength;
		head=(struct usb_descriptor_header *)&buffer[index];
	}
	if(len>0)
		return -1;
	len=usb_kbd_hid_desc.wDescriptorLength;
	if((index = usb_get_class_descriptor(dev, 0, USB_DT_REPORT, 0, &buffer[0], len)) < 0) {
		printf("reading report descriptor failed\n");
		return -1;
	}
	printf(" report descriptor (size %u, read %d)\n", len, index);
	start = &buffer[0];
	end = &buffer[len];
	i=0;
	do {
		index=fetch_item(start,end,&item);
		i+=index;
		i++;
		if(index>=0)
			usb_kbd_show_item(&item);

		start+=index;
		start++;
	} while(index>=0);

}

#endif
Commit	Line	Data
affae2bf WD	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>
c918261c	29	#include <asm/byteorder.h>
affae2bf	30
affae2bf WD	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	*/
6d0f6bcf	39	#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
affae2bf WD	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;
4785a694	86	static unsigned char ctrl = 0;
affae2bf WD	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	{
6d0f6bcf	123	#ifdef CONFIG_SYS_USB_EVENT_POLL
4785a694 ZW	124	usb_event_poll();
4785a694 ZW	125	#endif
affae2bf WD	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;
fdcfaa1b	135	while(usb_in_pointer==usb_out_pointer) {
6d0f6bcf	136	#ifdef CONFIG_SYS_USB_EVENT_POLL
fdcfaa1b ZW	137	usb_event_poll();
	138	#endif
	139	}
affae2bf WD	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	{
c1de7a6d	155	int error,i;
affae2bf WD	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 */
3b20fd83 RC	165	if(dev == NULL)
3b20fd83 RC	166	return -1;
affae2bf WD	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");
c1de7a6d JCPV	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;
affae2bf WD	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;
1eb734fe	186	usb_kbd_dev.priv = (void *)dev;
affae2bf WD	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	{
fea91ede	215	#ifdef CONFIG_SYS_DEVICE_DEREGISTER
affae2bf	216	return device_deregister(DEVNAME);
fea91ede JCPV	217	#else
	218	return 1;
	219	#endif
affae2bf WD	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,
53677ef1	245	0x200, iface->bInterfaceNumber,(void *)&leds, 1, 0);
affae2bf WD	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 */
53677ef1	258	repeat_delay=0;
affae2bf WD	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;
eb6f214d	268	if((scancode>3) && (scancode<=0x1d)) { /* alpha numeric values */
affae2bf WD	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	}
4785a694 ZW	285
	286	if (ctrl)
	287	keycode = scancode - 0x3;
	288
affae2bf WD	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;
4785a694 ZW	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
affae2bf WD	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
affae2bf WD	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) {
c918261c	482	item->data.u16 = le16_to_cpu((unsigned short *)start);
affae2bf WD	483	start+=2;
	484	return item->size;
	485	}
	486	case 3:
	487	item->size++;
	488	if ((end - start) >= 4) {
c918261c	489	item->data.u32 = le32_to_cpu((unsigned long *)start);
affae2bf WD	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
affae2bf WD	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
affae2bf WD	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];
c918261c	712	len=le16_to_cpu(config->wTotalLength);
affae2bf WD	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]);
c918261c CE	719	le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
c918261c CE	720	le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
affae2bf WD	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);
d0ff51ba WD	736	start = &buffer[0];
d0ff51ba WD	737	end = &buffer[len];
affae2bf WD	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
affae2bf	752	#endif