payloads/libpayload/drivers/keyboard.c - chromiumos/third_party/coreboot - Git at Google

 /*
  * This file is part of the libpayload project.
  *
  * Copyright (C) 2008 Advanced Micro Devices, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 #include <keycodes.h>
 #include <libpayload-config.h>
 #include <libpayload.h>

 #define I8042_CMD_DIS_KB     0xad

 struct layout_maps {
 	const char *country;
 	const unsigned short map[4][0x57];
 };

 static struct layout_maps *map;

 static struct layout_maps keyboard_layouts[] = {
 #ifdef CONFIG_LP_PC_KEYBOARD_LAYOUT_US
 { .country = "us", .map = {
 	{ /* No modifier */
 	 0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
 	 0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
 	 0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
 	 0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
 	 0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
 	 0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
 	 0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
 	 },
 	{ /* Shift */
 	 0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
 	 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
 	 0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
 	 0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
 	 0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
 	 0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
 	 0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
 	 },
 	{ /* ALT */
 	 0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
 	 0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
 	 0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
 	 0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
 	 0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
 	 0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
 	 0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
 	 },
 	{ /* Shift-ALT */
 	 0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
 	 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
 	 0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
 	 0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
 	 0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
 	 0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
 	 0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
 	 }
 }},
 #endif
 #ifdef CONFIG_LP_PC_KEYBOARD_LAYOUT_DE
 { .country = "de", .map = {
 	{ /* No modifier */
 	 0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
 	 0x37, 0x38, 0x39, 0x30, 0x00, 0x27, 0x08, 0x09,
 	 0x71, 0x77, 0x65, 0x72, 0x74, 0x7A, 0x75, 0x69,
 	 0x6F, 0x70, 0x00, 0x2B, 0x0A, 0x00, 0x61, 0x73,
 	 0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x00,
 	 0x00, 0x5E, 0x00, 0x23, 0x79, 0x78, 0x63, 0x76,
 	 0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2D, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x3C
 	 },
 	{ /* Shift */
 	 0x00, 0x1B, 0x21, 0x22, 0xA7, 0x24, 0x25, 0x26,
 	 0x2F, 0x28, 0x29, 0x3D, 0x3F, 0x60, 0x08, 0x00,
 	 0x51, 0x57, 0x45, 0x52, 0x54, 0x5A, 0x55, 0x49,
 	 0x4F, 0x50, 0x00, 0x2A, 0x0A, 0x00, 0x41, 0x53,
 	 0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x00,
 	 0x00, 0x7E, 0x00, 0x27, 0x59, 0x58, 0x43, 0x56,
 	 0x42, 0x4E, 0x4D, 0x3B, 0x3A, 0x5F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x3E
 	 },
 	{ /* ALT */
 	 0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
 	 0x7B, 0x5B, 0x5D, 0x7D, 0x5C, 0x3D, 0x08, 0x09,
 	 0x40, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
 	 0x6F, 0x70, 0x5B, 0x7E, 0x0A, 0x00, 0x61, 0x73,
 	 0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
 	 0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
 	 0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x7C
 	 },
 	{ /* Shift-ALT */
 	 /* copied from US */
 	 0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
 	 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
 	 0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
 	 0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
 	 0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
 	 0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
 	 0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
 	 0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
 	 KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
 	 KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
 	 KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
 	 }
 }},
 #endif
 };

 #define MOD_SHIFT    (1 << 0)
 #define MOD_CTRL     (1 << 1)
 #define MOD_CAPSLOCK (1 << 2)
 #define MOD_ALT      (1 << 3)

 static void keyboard_cmd(unsigned char cmd, unsigned char val)
 {
 	while (inb(0x64) & 2);
 	outb(cmd, 0x60);
 	mdelay(20);

 	while (inb(0x64) & 2);
 	outb(val, 0x60);
 	mdelay(20);
 }

 int keyboard_havechar(void)
 {
 	unsigned char c = inb(0x64);
 	return (c == 0xFF) ? 0 : c & 1;
 }

 unsigned char keyboard_get_scancode(void)
 {
 	unsigned char ch = 0;

 	if (keyboard_havechar())
 		ch = inb(0x60);

 	return ch;
 }

 int keyboard_getchar(void)
 {
 	static int modifier = 0;
 	unsigned char ch;
 	int shift;
 	int ret = 0;

 	while (!keyboard_havechar()) ;

 	ch = keyboard_get_scancode();

 	switch (ch) {
 	case 0x36:
 	case 0x2a:
 		modifier |= MOD_SHIFT;
 		break;
 	case 0x80 | 0x36:
 	case 0x80 | 0x2a:
 		modifier &= ~MOD_SHIFT;
 		break;
 	case 0x38:
 		modifier |= MOD_ALT;
 		break;
 	case 0x80 | 0x38:
 		modifier &= ~MOD_ALT;
 		break;
 	case 0x1d:
 		modifier |= MOD_CTRL;
 		break;
 	case 0x80 | 0x1d:
 		modifier &= ~MOD_CTRL;
 		break;
 	case 0x3a:
 		if (modifier & MOD_CAPSLOCK) {
 			modifier &= ~MOD_CAPSLOCK;
 			keyboard_cmd(0xed, (0 << 2));
 		} else {
 			modifier |= MOD_CAPSLOCK;
 			keyboard_cmd(0xed, (1 << 2));
 		}
 		break;
 	}

 	if (!(ch & 0x80) && ch < 0x57) {
 		shift =
 		    (modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0;

 		if (modifier & MOD_ALT)
 			shift += 2;

 		ret = map->map[shift][ch];

 		if (modifier & MOD_CTRL) {
 			switch (ret) {
 			case 'a' ... 'z':
 				ret &= 0x1f;
 				break;
 			case KEY_DC:
 				/* vulcan nerve pinch */
 				if ((modifier & MOD_ALT) && reset_handler)
 					reset_handler();
 			default:
 				ret = 0;
 			}
 		}
 	}

 	return ret;
 }

 static int keyboard_wait_write(void)
 {
 	int retries = 10000;

 	while(retries-- && (inb(0x64) & 0x02))
 		udelay(50);

 	return (retries <= 0) ? -1 : 0;
 }

 /**
  * Set keyboard layout
  * @param country string describing the keyboard layout language.
  * Valid values are "us", "de".
  */

 int keyboard_set_layout(char *country)
 {
 	int i;

 	for (i=0; i<ARRAY_SIZE(keyboard_layouts); i++) {
 		if (strncmp(keyboard_layouts[i].country, country,
 					strlen(keyboard_layouts[i].country)))
 			continue;

 		/* Found, changing keyboard layout */
 		map = &keyboard_layouts[i];
 		return 0;
 	}

 	/* Nothing found, not changed */
 	return -1;
 }

 static struct console_input_driver cons = {
 	.havekey = keyboard_havechar,
 	.getchar = keyboard_getchar
 };

 void keyboard_init(void)
 {
 	map = &keyboard_layouts[0];

 	/* If 0x64 returns 0xff, then we have no keyboard
 	 * controller */
 	if (inb(0x64) == 0xFF)
 		return;

 	/* Empty keyboard buffer */
 	while (keyboard_havechar()) keyboard_getchar();

 	console_add_input_driver(&cons);
 }

 void keyboard_disconnect(void)
 {
 	/* If 0x64 returns 0xff, then we have no keyboard
 	 * controller */
 	if (inb(0x64) == 0xFF)
 		return;

 	/* Empty keyboard buffer */
 	while (keyboard_havechar())
 		keyboard_getchar();

 	/* Send keyboard disconnect command */
 	outb(I8042_CMD_DIS_KB, 0x64);
 	keyboard_wait_write();

 	/* Hand off with empty buffer */
 	while (keyboard_havechar())
 		keyboard_getchar();
 }
	/*
	* This file is part of the libpayload project.
	*
	* Copyright (C) 2008 Advanced Micro Devices, Inc.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	#include <keycodes.h>
	#include <libpayload-config.h>
	#include <libpayload.h>

	#define I8042_CMD_DIS_KB 0xad

	struct layout_maps {
	const char *country;
	const unsigned short map[4][0x57];
	};

	static struct layout_maps *map;

	static struct layout_maps keyboard_layouts[] = {
	#ifdef CONFIG_LP_PC_KEYBOARD_LAYOUT_US
	{ .country = "us", .map = {
	{ /* No modifier */
	0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
	0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
	0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
	0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
	0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
	0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
	0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
	},
	{ /* Shift */
	0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
	0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
	0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
	0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
	0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
	0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
	0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
	},
	{ /* ALT */
	0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
	0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
	0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
	0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
	0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
	0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
	0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
	},
	{ /* Shift-ALT */
	0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
	0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
	0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
	0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
	0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
	0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
	0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
	}
	}},
	#endif
	#ifdef CONFIG_LP_PC_KEYBOARD_LAYOUT_DE
	{ .country = "de", .map = {
	{ /* No modifier */
	0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
	0x37, 0x38, 0x39, 0x30, 0x00, 0x27, 0x08, 0x09,
	0x71, 0x77, 0x65, 0x72, 0x74, 0x7A, 0x75, 0x69,
	0x6F, 0x70, 0x00, 0x2B, 0x0A, 0x00, 0x61, 0x73,
	0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x00,
	0x00, 0x5E, 0x00, 0x23, 0x79, 0x78, 0x63, 0x76,
	0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2D, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x3C
	},
	{ /* Shift */
	0x00, 0x1B, 0x21, 0x22, 0xA7, 0x24, 0x25, 0x26,
	0x2F, 0x28, 0x29, 0x3D, 0x3F, 0x60, 0x08, 0x00,
	0x51, 0x57, 0x45, 0x52, 0x54, 0x5A, 0x55, 0x49,
	0x4F, 0x50, 0x00, 0x2A, 0x0A, 0x00, 0x41, 0x53,
	0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x00,
	0x00, 0x7E, 0x00, 0x27, 0x59, 0x58, 0x43, 0x56,
	0x42, 0x4E, 0x4D, 0x3B, 0x3A, 0x5F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x3E
	},
	{ /* ALT */
	0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
	0x7B, 0x5B, 0x5D, 0x7D, 0x5C, 0x3D, 0x08, 0x09,
	0x40, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
	0x6F, 0x70, 0x5B, 0x7E, 0x0A, 0x00, 0x61, 0x73,
	0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
	0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
	0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x7C
	},
	{ /* Shift-ALT */
	/* copied from US */
	0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
	0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
	0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
	0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
	0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
	0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
	0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
	0x00, 0x20, 0x00, KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_F(5),
	KEY_F(6), KEY_F(7), KEY_F(8), KEY_F(9), KEY_F(10), 0x00, 0x00, KEY_HOME,
	KEY_UP, KEY_NPAGE, 0x00, KEY_LEFT, 0x00, KEY_RIGHT, 0x00, KEY_END,
	KEY_DOWN, KEY_PPAGE, 0x00, KEY_DC, 0x00, 0x00, 0x00
	}
	}},
	#endif
	};

	#define MOD_SHIFT (1 << 0)
	#define MOD_CTRL (1 << 1)
	#define MOD_CAPSLOCK (1 << 2)
	#define MOD_ALT (1 << 3)

	static void keyboard_cmd(unsigned char cmd, unsigned char val)
	{
	while (inb(0x64) & 2);
	outb(cmd, 0x60);
	mdelay(20);

	while (inb(0x64) & 2);
	outb(val, 0x60);
	mdelay(20);
	}

	int keyboard_havechar(void)
	{
	unsigned char c = inb(0x64);
	return (c == 0xFF) ? 0 : c & 1;
	}

	unsigned char keyboard_get_scancode(void)
	{
	unsigned char ch = 0;

	if (keyboard_havechar())
	ch = inb(0x60);

	return ch;
	}

	int keyboard_getchar(void)
	{
	static int modifier = 0;
	unsigned char ch;
	int shift;
	int ret = 0;

	while (!keyboard_havechar()) ;

	ch = keyboard_get_scancode();

	switch (ch) {
	case 0x36:
	case 0x2a:
	modifier \|= MOD_SHIFT;
	break;
	case 0x80 \| 0x36:
	case 0x80 \| 0x2a:
	modifier &= ~MOD_SHIFT;
	break;
	case 0x38:
	modifier \|= MOD_ALT;
	break;
	case 0x80 \| 0x38:
	modifier &= ~MOD_ALT;
	break;
	case 0x1d:
	modifier \|= MOD_CTRL;
	break;
	case 0x80 \| 0x1d:
	modifier &= ~MOD_CTRL;
	break;
	case 0x3a:
	if (modifier & MOD_CAPSLOCK) {
	modifier &= ~MOD_CAPSLOCK;
	keyboard_cmd(0xed, (0 << 2));
	} else {
	modifier \|= MOD_CAPSLOCK;
	keyboard_cmd(0xed, (1 << 2));
	}
	break;
	}

	if (!(ch & 0x80) && ch < 0x57) {
	shift =
	(modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0;

	if (modifier & MOD_ALT)
	shift += 2;

	ret = map->map[shift][ch];

	if (modifier & MOD_CTRL) {
	switch (ret) {
	case 'a' ... 'z':
	ret &= 0x1f;
	break;
	case KEY_DC:
	/* vulcan nerve pinch */
	if ((modifier & MOD_ALT) && reset_handler)
	reset_handler();
	default:
	ret = 0;
	}
	}
	}

	return ret;
	}

	static int keyboard_wait_write(void)
	{
	int retries = 10000;

	while(retries-- && (inb(0x64) & 0x02))
	udelay(50);

	return (retries <= 0) ? -1 : 0;
	}

	/**
	* Set keyboard layout
	* @param country string describing the keyboard layout language.
	* Valid values are "us", "de".
	*/

	int keyboard_set_layout(char *country)
	{
	int i;

	for (i=0; i<ARRAY_SIZE(keyboard_layouts); i++) {
	if (strncmp(keyboard_layouts[i].country, country,
	strlen(keyboard_layouts[i].country)))
	continue;

	/* Found, changing keyboard layout */
	map = &keyboard_layouts[i];
	return 0;
	}

	/* Nothing found, not changed */
	return -1;
	}

	static struct console_input_driver cons = {
	.havekey = keyboard_havechar,
	.getchar = keyboard_getchar
	};

	void keyboard_init(void)
	{
	map = &keyboard_layouts[0];

	/* If 0x64 returns 0xff, then we have no keyboard
	* controller */
	if (inb(0x64) == 0xFF)
	return;

	/* Empty keyboard buffer */
	while (keyboard_havechar()) keyboard_getchar();

	console_add_input_driver(&cons);
	}

	void keyboard_disconnect(void)
	{
	/* If 0x64 returns 0xff, then we have no keyboard
	* controller */
	if (inb(0x64) == 0xFF)
	return;

	/* Empty keyboard buffer */
	while (keyboard_havechar())
	keyboard_getchar();

	/* Send keyboard disconnect command */
	outb(I8042_CMD_DIS_KB, 0x64);
	keyboard_wait_write();

	/* Hand off with empty buffer */
	while (keyboard_havechar())
	keyboard_getchar();
	}