[people/ms/u-boot.git] / drivers / input / keyboard.c

/***********************************************************************
 *
 * (C) Copyright 2004
 * DENX Software Engineering
 * Wolfgang Denk, wd@denx.de
 *
 * Keyboard driver
 *
 ***********************************************************************/

#include <common.h>

#include <stdio_dev.h>
#include <keyboard.h>

#undef KBG_DEBUG

#ifdef KBG_DEBUG
#define	PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif


#define	DEVNAME			"kbd"

#define	LED_SCR			0x01	/* scroll lock led */
#define	LED_CAP			0x04	/* caps lock led */
#define	LED_NUM			0x02	/* num lock led */

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

#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
int ps2ser_check(void);
#endif

static volatile char kbd_buffer[KBD_BUFFER_LEN];
static volatile int in_pointer = 0;
static volatile int out_pointer = 0;

static unsigned char leds = 0;
static unsigned char num_lock = 0;
static unsigned char caps_lock = 0;
static unsigned char scroll_lock = 0;
static unsigned char shift = 0;
static unsigned char ctrl = 0;
static unsigned char alt = 0;
static unsigned char e0 = 0;

/******************************************************************
 * Queue handling
 ******************************************************************/

/* puts character in the queue and sets up the in and out pointer */
static void kbd_put_queue(char data)
{
	if((in_pointer+1)==KBD_BUFFER_LEN) {
		if(out_pointer==0) {
			return; /* buffer full */
		} else{
			in_pointer=0;
		}
	} else {
		if((in_pointer+1)==out_pointer)
			return; /* buffer full */
		in_pointer++;
	}
	kbd_buffer[in_pointer]=data;
	return;
}

/* test if a character is in the queue */
static int kbd_testc(void)
{
#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
	/* no ISR is used, so received chars must be polled */
	ps2ser_check();
#endif
	if(in_pointer==out_pointer)
		return(0); /* no data */
	else
		return(1);
}

/* gets the character from the queue */
static int kbd_getc(void)
{
	char c;
	while(in_pointer==out_pointer) {
#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
	/* no ISR is used, so received chars must be polled */
	ps2ser_check();
#endif
	;}
	if((out_pointer+1)==KBD_BUFFER_LEN)
		out_pointer=0;
	else
		out_pointer++;
	c=kbd_buffer[out_pointer];
	return (int)c;

}

/* Simple translation table for the keys */

static unsigned char kbd_plain_xlate[] = {
	0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t',	/* 0x00 - 0x0f */
	 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's',	/* 0x10 - 0x1f */
	 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v',	/* 0x20 - 0x2f */
	 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff,	/* 0x30 - 0x3f */
	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
	 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
	'\r',0xff,0xff
	};

static unsigned char kbd_shift_xlate[] = {
	0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t',	/* 0x00 - 0x0f */
	 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S',	/* 0x10 - 0x1f */
	 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V',	/* 0x20 - 0x2f */
	 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff,	/* 0x30 - 0x3f */
	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
	 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
	'\r',0xff,0xff
	};

static unsigned char kbd_ctrl_xlate[] = {
	0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t',	/* 0x00 - 0x0f */
	0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13,	/* 0x10 - 0x1f */
	0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16,	/* 0x20 - 0x2f */
	0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff,	/* 0x30 - 0x3f */
	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1',	/* 0x40 - 0x4f */
	 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,  /* 0x50 - 0x5F */
	'\r',0xff,0xff
	};


void handle_scancode(unsigned char scancode)
{
	unsigned char keycode;

	/*  Convert scancode to keycode */
	PRINTF("scancode %x\n",scancode);
	if(scancode==0xe0) {
		e0=1; /* special charakters */
		return;
	}
	if(e0==1) {
		e0=0; /* delete flag */
		if(!(	((scancode&0x7F)==0x38)|| /* the right ctrl key */
					((scancode&0x7F)==0x1D)|| /* the right alt key */
					((scancode&0x7F)==0x35)||	/* the right '/' key */
					((scancode&0x7F)==0x1C) ))  /* the right enter key */
			/* we swallow unknown e0 codes */
			return;
	}
	/* special cntrl keys */
	switch(scancode) {
	case 0x2A:
	case 0x36: /* shift pressed */
		shift=1;
		return; /* do nothing else */
	case 0xAA:
	case 0xB6: /* shift released */
		shift=0;
		return; /* do nothing else */
	case 0x38: /* alt pressed */
		alt=1;
		return; /* do nothing else */
	case 0xB8: /* alt released */
		alt=0;
		return; /* do nothing else */
	case 0x1d: /* ctrl pressed */
		ctrl=1;
		return; /* do nothing else */
	case 0x9d: /* ctrl released */
		ctrl=0;
		return; /* do nothing else */
	case 0x46: /* scrollock pressed */
		scroll_lock=~scroll_lock;
		if(scroll_lock==0)
			leds&=~LED_SCR; /* switch LED off */
		else
			leds|=LED_SCR; /* switch on LED */
		pckbd_leds(leds);
		return; /* do nothing else */
	case 0x3A: /* capslock pressed */
		caps_lock=~caps_lock;
		if(caps_lock==0)
			leds&=~LED_CAP; /* switch caps_lock off */
		else
			leds|=LED_CAP; /* switch on LED */
		pckbd_leds(leds);
		return;
	case 0x45: /* numlock pressed */
		num_lock=~num_lock;
		if(num_lock==0)
			leds&=~LED_NUM; /* switch LED off */
		else
			leds|=LED_NUM;  /* switch on LED */
		pckbd_leds(leds);
		return;
	case 0xC6: /* scroll lock released */
	case 0xC5: /* num lock released */
	case 0xBA: /* caps lock released */
		return; /* just swallow */
	}
#if 1
	if((scancode&0x80)==0x80) /* key released */
		return;
#else
	if((scancode&0x80)==0x00) /* key pressed */
		return;
	scancode &= ~0x80;
#endif
	/* now, decide which table we need */
	if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
		PRINTF("unkown scancode %X\n",scancode);
		return; /* swallow it */
	}
	/* setup plain code first */
	keycode=kbd_plain_xlate[scancode];
	if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
		if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
			PRINTF("unkown caps-locked scancode %X\n",scancode);
			return; /* swallow it */
		}
		keycode=kbd_shift_xlate[scancode];
		if(keycode<'A') { /* we only want the alphas capital */
			keycode=kbd_plain_xlate[scancode];
		}
	}
	if(shift==1) { /* shift overwrites caps_lock */
		if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
			PRINTF("unkown shifted scancode %X\n",scancode);
			return; /* swallow it */
		}
		keycode=kbd_shift_xlate[scancode];
	}
	if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
		if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
			PRINTF("unkown ctrl scancode %X\n",scancode);
			return; /* swallow it */
		}
		keycode=kbd_ctrl_xlate[scancode];
	}
	/* check if valid keycode */
	if(keycode==0xff) {
		PRINTF("unkown scancode %X\n",scancode);
		return; /* swallow unknown codes */
	}

	kbd_put_queue(keycode);
	PRINTF("%x\n",keycode);
}

/******************************************************************
 * Init
 ******************************************************************/

#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
extern int overwrite_console (void);
#define OVERWRITE_CONSOLE overwrite_console ()
#else
#define OVERWRITE_CONSOLE 0
#endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */

int kbd_init (void)
{
	int error;
	struct stdio_dev kbddev ;
	char *stdinname  = getenv ("stdin");

	if(kbd_init_hw()==-1)
		return -1;
	memset (&kbddev, 0, sizeof(kbddev));
	strcpy(kbddev.name, DEVNAME);
	kbddev.flags =  DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
	kbddev.putc = NULL ;
	kbddev.puts = NULL ;
	kbddev.getc = kbd_getc ;
	kbddev.tstc = kbd_testc ;

	error = stdio_register (&kbddev);
	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;
}
Commit	Line	Data
1c43771b WD	1	/***********************************************************************
	2	*
	3	* (C) Copyright 2004
	4	* DENX Software Engineering
	5	* Wolfgang Denk, wd@denx.de
1c43771b WD	6	*
	7	* Keyboard driver
	8	*
	9	***********************************************************************/
	10
	11	#include <common.h>
	12
52cb4d4f	13	#include <stdio_dev.h>
1c43771b WD	14	#include <keyboard.h>
	15
	16	#undef KBG_DEBUG
	17
	18	#ifdef KBG_DEBUG
	19	#define PRINTF(fmt,args...) printf (fmt ,##args)
	20	#else
	21	#define PRINTF(fmt,args...)
	22	#endif
	23
	24
	25	#define DEVNAME "kbd"
	26
	27	#define LED_SCR 0x01 /* scroll lock led */
	28	#define LED_CAP 0x04 /* caps lock led */
	29	#define LED_NUM 0x02 /* num lock led */
	30
	31	#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
	32
bd3143f0	33	#if defined(CONFIG_MPC5xxx) \|\| defined(CONFIG_MPC8540) \|\| defined(CONFIG_MPC8541) \|\| defined(CONFIG_MPC8555)
7e6bf358 WD	34	int ps2ser_check(void);
	35	#endif
	36
1c43771b WD	37	static volatile char kbd_buffer[KBD_BUFFER_LEN];
	38	static volatile int in_pointer = 0;
	39	static volatile int out_pointer = 0;
	40
	41	static unsigned char leds = 0;
	42	static unsigned char num_lock = 0;
	43	static unsigned char caps_lock = 0;
	44	static unsigned char scroll_lock = 0;
	45	static unsigned char shift = 0;
	46	static unsigned char ctrl = 0;
	47	static unsigned char alt = 0;
	48	static unsigned char e0 = 0;
	49
	50	/******************************************************************
	51	* Queue handling
	52	******************************************************************/
	53
	54	/* puts character in the queue and sets up the in and out pointer */
	55	static void kbd_put_queue(char data)
	56	{
	57	if((in_pointer+1)==KBD_BUFFER_LEN) {
	58	if(out_pointer==0) {
	59	return; /* buffer full */
	60	} else{
	61	in_pointer=0;
	62	}
	63	} else {
	64	if((in_pointer+1)==out_pointer)
	65	return; /* buffer full */
	66	in_pointer++;
	67	}
	68	kbd_buffer[in_pointer]=data;
	69	return;
	70	}
	71
	72	/* test if a character is in the queue */
	73	static int kbd_testc(void)
	74	{
bd3143f0	75	#if defined(CONFIG_MPC5xxx) \|\| defined(CONFIG_MPC8540) \|\| defined(CONFIG_MPC8541) \|\| defined(CONFIG_MPC8555)
7e6bf358 WD	76	/* no ISR is used, so received chars must be polled */
	77	ps2ser_check();
	78	#endif
1c43771b WD	79	if(in_pointer==out_pointer)
	80	return(0); /* no data */
	81	else
	82	return(1);
	83	}
	84
	85	/* gets the character from the queue */
	86	static int kbd_getc(void)
	87	{
	88	char c;
7e6bf358	89	while(in_pointer==out_pointer) {
bd3143f0	90	#if defined(CONFIG_MPC5xxx) \|\| defined(CONFIG_MPC8540) \|\| defined(CONFIG_MPC8541) \|\| defined(CONFIG_MPC8555)
7e6bf358 WD	91	/* no ISR is used, so received chars must be polled */
	92	ps2ser_check();
	93	#endif
	94	;}
1c43771b WD	95	if((out_pointer+1)==KBD_BUFFER_LEN)
	96	out_pointer=0;
	97	else
	98	out_pointer++;
	99	c=kbd_buffer[out_pointer];
	100	return (int)c;
	101
	102	}
	103
	104	/* Simple translation table for the keys */
	105
	106	static unsigned char kbd_plain_xlate[] = {
	107	0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
	108	'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
	109	'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
	110	'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
	111	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
	112	'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
	113	'\r',0xff,0xff
	114	};
	115
	116	static unsigned char kbd_shift_xlate[] = {
	117	0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '', '(', ')', '_', '+','\b','\t', / 0x00 - 0x0f */
	118	'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
	119	'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '\|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
	120	'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
	121	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
	122	'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
	123	'\r',0xff,0xff
	124	};
	125
	126	static unsigned char kbd_ctrl_xlate[] = {
	127	0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
	128	0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
	129	0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
	130	0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
	131	0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
	132	'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
	133	'\r',0xff,0xff
	134	};
	135
	136
	137	void handle_scancode(unsigned char scancode)
	138	{
	139	unsigned char keycode;
	140
	141	/* Convert scancode to keycode */
	142	PRINTF("scancode %x\n",scancode);
	143	if(scancode==0xe0) {
	144	e0=1; /* special charakters */
	145	return;
	146	}
	147	if(e0==1) {
	148	e0=0; /* delete flag */
	149	if(!( ((scancode&0x7F)==0x38)\|\| /* the right ctrl key */
	150	((scancode&0x7F)==0x1D)\|\| /* the right alt key */
	151	((scancode&0x7F)==0x35)\|\| /* the right '/' key */
	152	((scancode&0x7F)==0x1C) )) /* the right enter key */
	153	/* we swallow unknown e0 codes */
	154	return;
	155	}
	156	/* special cntrl keys */
	157	switch(scancode) {
	158	case 0x2A:
159	case 0x36: /* shift pressed */
160	shift=1;
161	return; /* do nothing else */
162	case 0xAA:
163	case 0xB6: /* shift released */
164	shift=0;
165	return; /* do nothing else */
166	case 0x38: /* alt pressed */
167	alt=1;
168	return; /* do nothing else */
169	case 0xB8: /* alt released */
170	alt=0;
171	return; /* do nothing else */
172	case 0x1d: /* ctrl pressed */
173	ctrl=1;
174	return; /* do nothing else */
175	case 0x9d: /* ctrl released */
176	ctrl=0;
177	return; /* do nothing else */
178	case 0x46: /* scrollock pressed */
179	scroll_lock=~scroll_lock;
180	if(scroll_lock==0)
181	leds&=~LED_SCR; /* switch LED off */
182	else
183	leds\|=LED_SCR; /* switch on LED */
184	pckbd_leds(leds);
185	return; /* do nothing else */
186	case 0x3A: /* capslock pressed */
187	caps_lock=~caps_lock;
188	if(caps_lock==0)
189	leds&=~LED_CAP; /* switch caps_lock off */
190	else
191	leds\|=LED_CAP; /* switch on LED */
192	pckbd_leds(leds);
193	return;
194	case 0x45: /* numlock pressed */
195	num_lock=~num_lock;
196	if(num_lock==0)
197	leds&=~LED_NUM; /* switch LED off */
198	else
199	leds\|=LED_NUM; /* switch on LED */
200	pckbd_leds(leds);
201	return;
202	case 0xC6: /* scroll lock released */
203	case 0xC5: /* num lock released */
204	case 0xBA: /* caps lock released */
205	return; /* just swallow */
206	}
ef978730	207	#if 1
1c43771b WD	208	if((scancode&0x80)==0x80) /* key released */
1c43771b WD	209	return;
c837dcb1 WD	210	#else
	211	if((scancode&0x80)==0x00) /* key pressed */
	212	return;
	213	scancode &= ~0x80;
	214	#endif
1c43771b WD	215	/* now, decide which table we need */
	216	if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
	217	PRINTF("unkown scancode %X\n",scancode);
	218	return; /* swallow it */
	219	}
	220	/* setup plain code first */
	221	keycode=kbd_plain_xlate[scancode];
	222	if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
	223	if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
	224	PRINTF("unkown caps-locked scancode %X\n",scancode);
	225	return; /* swallow it */
	226	}
	227	keycode=kbd_shift_xlate[scancode];
	228	if(keycode<'A') { /* we only want the alphas capital */
	229	keycode=kbd_plain_xlate[scancode];
	230	}
	231	}
	232	if(shift==1) { /* shift overwrites caps_lock */
	233	if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
	234	PRINTF("unkown shifted scancode %X\n",scancode);
	235	return; /* swallow it */
	236	}
	237	keycode=kbd_shift_xlate[scancode];
	238	}
	239	if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
	240	if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
	241	PRINTF("unkown ctrl scancode %X\n",scancode);
	242	return; /* swallow it */
	243	}
	244	keycode=kbd_ctrl_xlate[scancode];
	245	}
	246	/* check if valid keycode */
	247	if(keycode==0xff) {
	248	PRINTF("unkown scancode %X\n",scancode);
	249	return; /* swallow unknown codes */
	250	}
	251
	252	kbd_put_queue(keycode);
	253	PRINTF("%x\n",keycode);
	254	}
	255
	256	/******************************************************************
	257	* Init
	258	******************************************************************/
	259
6d0f6bcf	260	#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
1c43771b	261	extern int overwrite_console (void);
83e40ba7	262	#define OVERWRITE_CONSOLE overwrite_console ()
1c43771b	263	#else
83e40ba7	264	#define OVERWRITE_CONSOLE 0
6d0f6bcf	265	#endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
1c43771b WD	266
	267	int kbd_init (void)
	268	{
	269	int error;
52cb4d4f	270	struct stdio_dev kbddev ;
1c43771b WD	271	char *stdinname = getenv ("stdin");
	272
	273	if(kbd_init_hw()==-1)
	274	return -1;
53677ef1 WD	275	memset (&kbddev, 0, sizeof(kbddev));
	276	strcpy(kbddev.name, DEVNAME);
	277	kbddev.flags = DEV_FLAGS_INPUT \| DEV_FLAGS_SYSTEM;
	278	kbddev.putc = NULL ;
1c43771b WD	279	kbddev.puts = NULL ;
	280	kbddev.getc = kbd_getc ;
	281	kbddev.tstc = kbd_testc ;
	282
52cb4d4f	283	error = stdio_register (&kbddev);
1c43771b WD	284	if(error==0) {
	285	/* check if this is the standard input device */
	286	if(strcmp(stdinname,DEVNAME)==0) {
	287	/* reassign the console */
83e40ba7	288	if(OVERWRITE_CONSOLE) {
1c43771b WD	289	return 1;
	290	}
	291	error=console_assign(stdin,DEVNAME);
	292	if(error==0)
	293	return 1;
	294	else
	295	return error;
	296	}
	297	return 1;
	298	}
	299	return error;
	300	}