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30 results

mkdeps.sh

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  • usb_kbd.c 18.70 KiB
    /*
     * (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>
    
    #ifdef CONFIG_USB_KEYBOARD
    
    #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 CFG_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 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)
    {
    	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);
    	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,index;
    	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->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");
    				for (index=1; index<=ListNumItems(devlist); index++) {
    					old_dev = ListGetPtrToItem(devlist, index);
    					if(strcmp(old_dev->name,DEVNAME)==0) {
    						/* 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;
    				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)
    {
    	return device_deregister(DEVNAME);
    }
    
    /**************************************************************************
     * 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(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;
    	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 = swap_16((unsigned short *)start);
    						start+=2;
    						return item->size;
    					}
    				case 3:
    					item->size++;
    					if ((end - start) >= 4) {
    						item->data.u32 = swap_32((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=swap_16(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]);
    			usb_kbd_hid_desc.bcdHID=swap_16(usb_kbd_hid_desc.bcdHID);
    			usb_kbd_hid_desc.wDescriptorLength=swap_16(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
    
    #endif /* CONFIG_USB_KEYBOARD */