Initial revision

1 files changed, 655 insertions, 0 deletions

diff --git a/board/mpl/common/kbd.c b/board/mpl/common/kbd.c
new file mode 100644
index 0000000..5b87cdb
--- /dev/null
+++ b/board/mpl/common/kbd.c
@@ -0,0 +1,655 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
+ *
+ * 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
+ *
+ *
+ * Source partly derived from:
+ * linux/drivers/char/pc_keyb.c
+ *
+ *
+ */
+#include <common.h>
+#include <asm/processor.h>
+#include <devices.h>
+#include "isa.h"
+#include "kbd.h"
+
+
+unsigned char kbd_read_status(void);
+unsigned char kbd_read_input(void);
+void kbd_send_data(unsigned char data);
+void disable_8259A_irq(unsigned int irq);
+void enable_8259A_irq(unsigned int irq);
+
+/* used only by send_data - set by keyboard_interrupt */
+
+
+#undef KBG_DEBUG
+
+#ifdef KBG_DEBUG
+#define	PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+#define KBD_STAT_KOBF		0x01
+#define KBD_STAT_IBF		0x02
+#define KBD_STAT_SYS		0x04
+#define KBD_STAT_CD			0x08
+#define KBD_STAT_LOCK		0x10
+#define KBD_STAT_MOBF		0x20
+#define KBD_STAT_TI_OUT	0x40
+#define KBD_STAT_PARERR	0x80
+
+#define KBD_INIT_TIMEOUT 1000		/* Timeout in ms for initializing the keyboard */
+#define KBC_TIMEOUT 250			/* Timeout in ms for sending to keyboard controller */
+#define KBD_TIMEOUT 2000		/* Timeout in ms for keyboard command acknowledge */
+/*
+ *	Keyboard Controller Commands
+ */
+
+#define KBD_CCMD_READ_MODE			0x20	/* Read mode bits */
+#define KBD_CCMD_WRITE_MODE			0x60	/* Write mode bits */
+#define KBD_CCMD_GET_VERSION		0xA1	/* Get controller version */
+#define KBD_CCMD_MOUSE_DISABLE	0xA7	/* Disable mouse interface */
+#define KBD_CCMD_MOUSE_ENABLE		0xA8	/* Enable mouse interface */
+#define KBD_CCMD_TEST_MOUSE			0xA9	/* Mouse interface test */
+#define KBD_CCMD_SELF_TEST			0xAA	/* Controller self test */
+#define KBD_CCMD_KBD_TEST				0xAB	/* Keyboard interface test */
+#define KBD_CCMD_KBD_DISABLE		0xAD	/* Keyboard interface disable */
+#define KBD_CCMD_KBD_ENABLE			0xAE	/* Keyboard interface enable */
+#define KBD_CCMD_WRITE_AUX_OBUF	0xD3    /* Write to output buffer as if
+					   initiated by the auxiliary device */
+#define KBD_CCMD_WRITE_MOUSE		0xD4	/* Write the following byte to the mouse */
+
+/*
+ *	Keyboard Commands
+ */
+
+#define KBD_CMD_SET_LEDS				0xED	/* Set keyboard leds */
+#define KBD_CMD_SET_RATE				0xF3	/* Set typematic rate */
+#define KBD_CMD_ENABLE					0xF4	/* Enable scanning */
+#define KBD_CMD_DISABLE					0xF5	/* Disable scanning */
+#define KBD_CMD_RESET						0xFF	/* Reset */
+
+/*
+ *	Keyboard Replies
+ */
+
+#define KBD_REPLY_POR						0xAA	/* Power on reset */
+#define KBD_REPLY_ACK						0xFA	/* Command ACK */
+#define KBD_REPLY_RESEND				0xFE	/* Command NACK, send the cmd again */
+
+/*
+ *	Status Register Bits
+ */
+
+#define KBD_STAT_OBF 						0x01	/* Keyboard output buffer full */
+#define KBD_STAT_IBF 						0x02	/* Keyboard input buffer full */
+#define KBD_STAT_SELFTEST				0x04	/* Self test successful */
+#define KBD_STAT_CMD						0x08	/* Last write was a command write (0=data) */
+#define KBD_STAT_UNLOCKED				0x10	/* Zero if keyboard locked */
+#define KBD_STAT_MOUSE_OBF			0x20	/* Mouse output buffer full */
+#define KBD_STAT_GTO 						0x40	/* General receive/xmit timeout */
+#define KBD_STAT_PERR 					0x80	/* Parity error */
+
+#define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF)
+
+/*
+ *	Controller Mode Register Bits
+ */
+
+#define KBD_MODE_KBD_INT				0x01	/* Keyboard data generate IRQ1 */
+#define KBD_MODE_MOUSE_INT			0x02	/* Mouse data generate IRQ12 */
+#define KBD_MODE_SYS 						0x04	/* The system flag (?) */
+#define KBD_MODE_NO_KEYLOCK			0x08	/* The keylock doesn't affect the keyboard if set */
+#define KBD_MODE_DISABLE_KBD		0x10	/* Disable keyboard interface */
+#define KBD_MODE_DISABLE_MOUSE	0x20	/* Disable mouse interface */
+#define KBD_MODE_KCC 						0x40	/* Scan code conversion to PC format */
+#define KBD_MODE_RFU						0x80
+
+
+#define KDB_DATA_PORT			0x60
+#define KDB_COMMAND_PORT	0x64
+
+#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 */
+
+
+
+
+static volatile char kbd_buffer[KBD_BUFFER_LEN];
+static volatile int in_pointer = 0;
+static volatile int out_pointer = 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;
+static unsigned char leds = 0;
+
+#define DEVNAME "kbd"
+
+/* 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
+	};
+
+/******************************************************************
+ * Init
+ ******************************************************************/
+int isa_kbd_init(void)
+{
+	char* result;
+	result=kbd_initialize();
+	if(result==NULL) {
+		PRINTF("AT Keyboard initialized\n");
+		irq_install_handler(25, (interrupt_handler_t *)handle_isa_int, NULL);
+		isa_irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL);
+		return (1);
+	}
+	else {
+		printf("%s\n",result);
+		return (-1);
+	}
+}
+
+#ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
+extern int overwrite_console (void);
+#else
+int overwrite_console (void)
+{
+	return (0);
+}
+#endif
+
+int drv_isa_kbd_init (void)
+{
+	int error;
+  	device_t kbddev ;
+	char *stdinname  = getenv ("stdin");
+
+	if(isa_kbd_init()==-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 = device_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;
+}
+
+/******************************************************************
+ * Queue handling
+ ******************************************************************/
+/* puts character in the queue and sets up the in and out pointer */
+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 */
+int kbd_testc(void)
+{
+	if(in_pointer==out_pointer)
+		return(0); /* no data */
+	else
+		return(1);
+}
+/* gets the character from the queue */
+int kbd_getc(void)
+{
+	char c;
+	while(in_pointer==out_pointer);
+	if((out_pointer+1)==KBD_BUFFER_LEN)
+		out_pointer=0;
+	else
+		out_pointer++;
+	c=kbd_buffer[out_pointer];
+	return (int)c;
+
+}
+
+
+/* set LEDs */
+
+void kbd_set_leds(void)
+{
+	if(caps_lock==0)
+		leds&=~LED_CAP; /* switch caps_lock off */
+	else
+		leds|=LED_CAP; /* switch on LED */
+	if(num_lock==0)
+		leds&=~LED_NUM; /* switch LED off */
+	else
+		leds|=LED_NUM;  /* switch on LED */
+	if(scroll_lock==0)
+		leds&=~LED_SCR; /* switch LED off */
+	else
+		leds|=LED_SCR; /* switch on LED */
+	kbd_send_data(KBD_CMD_SET_LEDS);
+	kbd_send_data(leds);
+}
+
+
+void handle_keyboard_event(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;
+			kbd_set_leds();
+			return; /* do nothing else */
+		case 0x3A: /* capslock pressed */
+			caps_lock=~caps_lock;
+			kbd_set_leds();
+			return;
+		case 0x45: /* numlock pressed */
+			num_lock=~num_lock;
+			kbd_set_leds();
+			return;
+		case 0xC6: /* scroll lock released */
+		case 0xC5: /* num lock released */
+		case 0xBA: /* caps lock released */
+			return; /* just swallow */
+	}
+	if((scancode&0x80)==0x80) /* key released */
+		return;
+	/* 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);
+}
+
+/*
+ * This reads the keyboard status port, and does the
+ * appropriate action.
+ *
+ */
+unsigned char handle_kbd_event(void)
+{
+	unsigned char status = kbd_read_status();
+	unsigned int work = 10000;
+
+	while ((--work > 0) && (status & KBD_STAT_OBF)) {
+		unsigned char scancode;
+
+		scancode = kbd_read_input();
+
+		/* Error bytes must be ignored to make the
+		   Synaptics touchpads compaq use work */
+		/* Ignore error bytes */
+		if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR)))
+		{
+			if (status & KBD_STAT_MOUSE_OBF)
+				; /* not supported: handle_mouse_event(scancode); */
+			else
+				handle_keyboard_event(scancode);
+		}
+		status = kbd_read_status();
+	}
+	if (!work)
+		PRINTF("pc_keyb: controller jammed (0x%02X).\n", status);
+	return status;
+}
+
+
+
+/******************************************************************************
+ * Lowlevel Part of keyboard section
+ */
+unsigned char kbd_read_status(void)
+{
+	return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT));
+}
+
+unsigned char kbd_read_input(void)
+{
+	return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT));
+}
+
+void kbd_write_command(unsigned char cmd)
+{
+	out8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd);
+}
+
+void kbd_write_output(unsigned char data)
+{
+	out8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data);
+}
+
+int kbd_read_data(void)
+{
+	int val;
+	unsigned char status;
+
+	val=-1;
+	status = kbd_read_status();
+	if (status & KBD_STAT_OBF) {
+		val = kbd_read_input();
+		if (status & (KBD_STAT_GTO | KBD_STAT_PERR))
+			val = -2;
+	}
+	return val;
+}
+
+int kbd_wait_for_input(void)
+{
+	unsigned long timeout;
+	int val;
+
+	timeout = KBD_TIMEOUT;
+	val=kbd_read_data();
+	while(val < 0)
+	{
+		if(timeout--==0)
+			return -1;
+		udelay(1000);
+		val=kbd_read_data();
+	}
+	return val;
+}
+
+
+int kb_wait(void)
+{
+	unsigned long timeout = KBC_TIMEOUT * 10;
+
+	do {
+		unsigned char status = handle_kbd_event();
+		if (!(status & KBD_STAT_IBF))
+			return 0; /* ok */
+		udelay(1000);
+		timeout--;
+	} while (timeout);
+	return 1;
+}
+
+void kbd_write_command_w(int data)
+{
+	if(kb_wait())
+		PRINTF("timeout in kbd_write_command_w\n");
+	kbd_write_command(data);
+}
+
+void kbd_write_output_w(int data)
+{
+	if(kb_wait())
+		PRINTF("timeout in kbd_write_output_w\n");
+	kbd_write_output(data);
+}
+
+void kbd_send_data(unsigned char data)
+{
+	unsigned char status;
+	disable_8259A_irq(1); /* disable interrupt */
+	kbd_write_output_w(data);
+	status = kbd_wait_for_input();
+	if (status == KBD_REPLY_ACK)
+		enable_8259A_irq(1); /* enable interrupt */
+}
+
+
+char * kbd_initialize(void)
+{
+	int status;
+
+	in_pointer = 0; /* delete in Buffer */
+	out_pointer = 0;
+	/*
+	 * Test the keyboard interface.
+	 * This seems to be the only way to get it going.
+	 * If the test is successful a x55 is placed in the input buffer.
+	 */
+	kbd_write_command_w(KBD_CCMD_SELF_TEST);
+	if (kbd_wait_for_input() != 0x55)
+		return "Kbd:   failed self test";
+	/*
+	 * Perform a keyboard interface test.  This causes the controller
+	 * to test the keyboard clock and data lines.  The results of the
+	 * test are placed in the input buffer.
+	 */
+	kbd_write_command_w(KBD_CCMD_KBD_TEST);
+	if (kbd_wait_for_input() != 0x00)
+		return "Kbd:   interface failed self test";
+	/*
+	 * Enable the keyboard by allowing the keyboard clock to run.
+	 */
+	kbd_write_command_w(KBD_CCMD_KBD_ENABLE);
+	status = kbd_wait_for_input();
+	/*
+	 * Reset keyboard. If the read times out
+	 * then the assumption is that no keyboard is
+	 * plugged into the machine.
+	 * This defaults the keyboard to scan-code set 2.
+	 *
+	 * Set up to try again if the keyboard asks for RESEND.
+	 */
+	do {
+		kbd_write_output_w(KBD_CMD_RESET);
+		status = kbd_wait_for_input();
+		if (status == KBD_REPLY_ACK)
+			break;
+		if (status != KBD_REPLY_RESEND)
+		{
+			PRINTF("status: %X\n",status);
+			return "Kbd:   reset failed, no ACK";
+		}
+	} while (1);
+	if (kbd_wait_for_input() != KBD_REPLY_POR)
+		return "Kbd:   reset failed, no POR";
+
+	/*
+	 * Set keyboard controller mode. During this, the keyboard should be
+	 * in the disabled state.
+	 *
+	 * Set up to try again if the keyboard asks for RESEND.
+	 */
+	do {
+		kbd_write_output_w(KBD_CMD_DISABLE);
+		status = kbd_wait_for_input();
+		if (status == KBD_REPLY_ACK)
+			break;
+		if (status != KBD_REPLY_RESEND)
+			return "Kbd:   disable keyboard: no ACK";
+	} while (1);
+
+	kbd_write_command_w(KBD_CCMD_WRITE_MODE);
+	kbd_write_output_w(KBD_MODE_KBD_INT
+			      | KBD_MODE_SYS
+			      | KBD_MODE_DISABLE_MOUSE
+			      | KBD_MODE_KCC);
+
+	/* ibm powerpc portables need this to use scan-code set 1 -- Cort */
+	kbd_write_command_w(KBD_CCMD_READ_MODE);
+	if (!(kbd_wait_for_input() & KBD_MODE_KCC)) {
+		/*
+		 * If the controller does not support conversion,
+		 * Set the keyboard to scan-code set 1.
+		 */
+		kbd_write_output_w(0xF0);
+		kbd_wait_for_input();
+		kbd_write_output_w(0x01);
+		kbd_wait_for_input();
+	}
+	kbd_write_output_w(KBD_CMD_ENABLE);
+	if (kbd_wait_for_input() != KBD_REPLY_ACK)
+		return "Kbd:   enable keyboard: no ACK";
+
+	/*
+	 * Finally, set the typematic rate to maximum.
+	 */
+	kbd_write_output_w(KBD_CMD_SET_RATE);
+	if (kbd_wait_for_input() != KBD_REPLY_ACK)
+		return "Kbd:   Set rate: no ACK";
+	kbd_write_output_w(0x00);
+	if (kbd_wait_for_input() != KBD_REPLY_ACK)
+		return "Kbd:   Set rate: no ACK";
+	return NULL;
+}
+
+void kbd_interrupt(void)
+{
+	handle_kbd_event();
+}
+
+
+
+/* eof */
+