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u-boot/drivers/input/i8042.c
Bin Meng 7d96166b1b x86: i8042: Correctly initialize the controller 
The existing i8042 keyboard controller driver has some issues.
First of all, it does not issue a self-test command (0xaa) to the
controller at the very beginning. Without this, the controller
does not respond to any command at all. Secondly, it initializes
the configuration byte register to turn on the keyboard's interrupt,
as U-Boot does not normally allow interrupts to be processed.
Finally, at the end of the initialization routine, it wrongly
sets the controller to disable all interfaces including both
keyboard and mouse.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-08-26 07:54:16 -07:00

655 lines
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/*
* (C) Copyright 2002 ELTEC Elektronik AG
* Frank Gottschling <fgottschling@eltec.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/* i8042.c - Intel 8042 keyboard driver routines */
/* includes */
#include <common.h>
#include <asm/io.h>
#include <i8042.h>
/* defines */
#define in8(p) inb(p)
#define out8(p, v) outb(v, p)
#ifdef CONFIG_CONSOLE_CURSOR
extern void console_cursor(int state);
static int blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
static int cursor_state;
#endif
/* locals */
static int kbd_input = -1; /* no input yet */
static int kbd_mapping = KBD_US; /* default US keyboard */
static int kbd_flags = NORMAL; /* after reset */
static int kbd_state; /* unshift code */
static unsigned char kbd_fct_map[144] = {
/* kbd_fct_map table for scan code */
0, AS, AS, AS, AS, AS, AS, AS, /* scan 00-07 */
AS, AS, AS, AS, AS, AS, AS, AS, /* scan 08-0F */
AS, AS, AS, AS, AS, AS, AS, AS, /* scan 10-17 */
AS, AS, AS, AS, AS, CN, AS, AS, /* scan 18-1F */
AS, AS, AS, AS, AS, AS, AS, AS, /* scan 20-27 */
AS, AS, SH, AS, AS, AS, AS, AS, /* scan 28-2F */
AS, AS, AS, AS, AS, AS, SH, AS, /* scan 30-37 */
AS, AS, CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, ES, /* scan 40-47 */
ES, ES, ES, ES, ES, ES, ES, ES, /* scan 48-4F */
ES, ES, ES, ES, 0, 0, AS, 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
AS, 0, 0, AS, 0, 0, AS, 0, /* scan 70-77 */
0, AS, 0, 0, 0, AS, 0, 0, /* scan 78-7F */
AS, CN, AS, AS, AK, ST, EX, EX, /* enhanced */
AS, EX, EX, AS, EX, AS, EX, EX /* enhanced */
};
static unsigned char kbd_key_map[2][5][144] = {
{ /* US keyboard */
{ /* unshift code */
0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
'7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 08-0F */
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', /* scan 10-17 */
'o', 'p', '[', ']', '\r', CN, 'a', 's', /* scan 18-1F */
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* scan 20-27 */
'\'', '`', SH, '\\', 'z', 'x', 'c', 'v', /* scan 28-2F */
'b', 'n', 'm', ',', '.', '/', SH, '*', /* scan 30-37 */
' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
'2', '3', '0', '.', 0, 0, 0, 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
},
{ /* shift code */
0, 0x1b, '!', '@', '#', '$', '%', '^', /* scan 00-07 */
'&', '*', '(', ')', '_', '+', 0x08, '\t', /* scan 08-0F */
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', /* scan 10-17 */
'O', 'P', '{', '}', '\r', CN, 'A', 'S', /* scan 18-1F */
'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* scan 20-27 */
'"', '~', SH, '|', 'Z', 'X', 'C', 'V', /* scan 28-2F */
'B', 'N', 'M', '<', '>', '?', SH, '*', /* scan 30-37 */
' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
'2', '3', '0', '.', 0, 0, 0, 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
},
{ /* control code */
0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 08-0F */
0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
0x0f, 0x10, 0x1b, 0x1d, '\r', CN, 0x01, 0x13, /* scan 18-1F */
0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
0xff, 0x1c, SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff, SH, 0xff, /* scan 30-37 */
0xff, 0xff, CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
0xff, 0xff, 0xff, 0xff, 0xff, NM, ST, 0xff, /* scan 40-47 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 0xff, 0xff, /* extended */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
},
{ /* non numeric code */
0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
'7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 08-0F */
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', /* scan 10-17 */
'o', 'p', '[', ']', '\r', CN, 'a', 's', /* scan 18-1F */
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* scan 20-27 */
'\'', '`', SH, '\\', 'z', 'x', 'c', 'v', /* scan 28-2F */
'b', 'n', 'm', ',', '.', '/', SH, '*', /* scan 30-37 */
' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, 'w', /* scan 40-47 */
'x', 'y', 'l', 't', 'u', 'v', 'm', 'q', /* scan 48-4F */
'r', 's', 'p', 'n', 0, 0, 0, 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
},
{ /* right alt mode - not used in US keyboard */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 08-0F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
}
},
{ /* German keyboard */
{ /* unshift code */
0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
'7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */
'o', 'p', 0x81, '+', '\r', CN, 'a', 's', /* scan 18-1F */
'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */
0x84, '^', SH, '#', 'y', 'x', 'c', 'v', /* scan 28-2F */
'b', 'n', 'm', ',', '.', '-', SH, '*', /* scan 30-37 */
' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
'2', '3', '0', ',', 0, 0, '<', 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
},
{ /* shift code */
0, 0x1b, '!', '"', 0x15, '$', '%', '&', /* scan 00-07 */
'/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 08-0F */
'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* scan 10-17 */
'O', 'P', 0x9a, '*', '\r', CN, 'A', 'S', /* scan 18-1F */
'D', 'F', 'G', 'H', 'J', 'K', 'L', 0x99, /* scan 20-27 */
0x8e, 0xf8, SH, '\'', 'Y', 'X', 'C', 'V', /* scan 28-2F */
'B', 'N', 'M', ';', ':', '_', SH, '*', /* scan 30-37 */
' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
'2', '3', '0', ',', 0, 0, '>', 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
},
{ /* control code */
0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 08-0F */
0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
0x0f, 0x10, 0x1b, 0x1d, '\r', CN, 0x01, 0x13, /* scan 18-1F */
0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
0xff, 0x1c, SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff, SH, 0xff, /* scan 30-37 */
0xff, 0xff, CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
0xff, 0xff, 0xff, 0xff, 0xff, NM, ST, 0xff, /* scan 40-47 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 0xff, 0xff, /* extended */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
},
{ /* non numeric code */
0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
'7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */
'o', 'p', 0x81, '+', '\r', CN, 'a', 's', /* scan 18-1F */
'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */
0x84, '^', SH, 0, 'y', 'x', 'c', 'v', /* scan 28-2F */
'b', 'n', 'm', ',', '.', '-', SH, '*', /* scan 30-37 */
' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
0, 0, 0, 0, 0, NM, ST, 'w', /* scan 40-47 */
'x', 'y', 'l', 't', 'u', 'v', 'm', 'q', /* scan 48-4F */
'r', 's', 'p', 'n', 0, 0, '<', 0, /* scan 50-57 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
'\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
},
{ /* right alt mode - is used in German keyboard */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
'{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */
'@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
0xff, 0xff, 0xff, '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '|', 0xff, /* scan 50-57 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
}
}
};
static unsigned char ext_key_map[] = {
0x1c, /* keypad enter */
0x1d, /* right control */
0x35, /* keypad slash */
0x37, /* print screen */
0x38, /* right alt */
0x46, /* break */
0x47, /* editpad home */
0x48, /* editpad up */
0x49, /* editpad pgup */
0x4b, /* editpad left */
0x4d, /* editpad right */
0x4f, /* editpad end */
0x50, /* editpad dn */
0x51, /* editpad pgdn */
0x52, /* editpad ins */
0x53, /* editpad del */
0x00 /* map end */
};
static int kbd_input_empty(void)
{
int kbd_timeout = KBD_TIMEOUT * 1000;
while ((in8(I8042_STS_REG) & STATUS_IBF) && kbd_timeout--)
udelay(1);
return kbd_timeout != -1;
}
static int kbd_output_full(void)
{
int kbd_timeout = KBD_TIMEOUT * 1000;
while (((in8(I8042_STS_REG) & STATUS_OBF) == 0) && kbd_timeout--)
udelay(1);
return kbd_timeout != -1;
}
static void kbd_led_set(void)
{
kbd_input_empty();
out8(I8042_DATA_REG, CMD_SET_KBD_LED);
kbd_input_empty();
out8(I8042_DATA_REG, (kbd_flags & 0x7));
}
static void kbd_normal(unsigned char scan_code)
{
unsigned char chr;
if ((kbd_flags & BRK) == NORMAL) {
chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
if ((chr == 0xff) || (chr == 0x00))
return;
/* if caps lock convert upper to lower */
if (((kbd_flags & CAPS) == CAPS) &&
(chr >= 'a' && chr <= 'z')) {
chr -= 'a' - 'A';
}
kbd_input = chr;
}
}
static void kbd_shift(unsigned char scan_code)
{
if ((kbd_flags & BRK) == BRK) {
kbd_state = AS;
kbd_flags &= (~SHIFT);
} else {
kbd_state = SH;
kbd_flags |= SHIFT;
}
}
static void kbd_ctrl(unsigned char scan_code)
{
if ((kbd_flags & BRK) == BRK) {
kbd_state = AS;
kbd_flags &= (~CTRL);
} else {
kbd_state = CN;
kbd_flags |= CTRL;
}
}
static void kbd_num(unsigned char scan_code)
{
if ((kbd_flags & BRK) == NORMAL) {
kbd_flags ^= NUM;
kbd_state = (kbd_flags & NUM) ? AS : NM;
kbd_led_set();
}
}
static void kbd_alt(unsigned char scan_code)
{
if ((kbd_flags & BRK) == BRK) {
kbd_state = AS;
kbd_flags &= (~ALT);
} else {
kbd_state = AK;
kbd_flags &= ALT;
}
}
static void kbd_caps(unsigned char scan_code)
{
if ((kbd_flags & BRK) == NORMAL) {
kbd_flags ^= CAPS;
kbd_led_set();
}
}
static void kbd_scroll(unsigned char scan_code)
{
if ((kbd_flags & BRK) == NORMAL) {
kbd_flags ^= STP;
kbd_led_set();
if (kbd_flags & STP)
kbd_input = 0x13;
else
kbd_input = 0x11;
}
}
static void kbd_conv_char(unsigned char scan_code)
{
if (scan_code == 0xe0) {
kbd_flags |= EXT;
return;
}
/* if high bit of scan_code, set break flag */
if (scan_code & 0x80)
kbd_flags |= BRK;
else
kbd_flags &= ~BRK;
if ((scan_code == 0xe1) || (kbd_flags & E1)) {
if (scan_code == 0xe1) {
kbd_flags ^= BRK; /* reset the break flag */
kbd_flags ^= E1; /* bitwise EXOR with E1 flag */
}
return;
}
scan_code &= 0x7f;
if (kbd_flags & EXT) {
int i;
kbd_flags ^= EXT;
for (i = 0; ext_key_map[i]; i++) {
if (ext_key_map[i] == scan_code) {
scan_code = 0x80 + i;
break;
}
}
/* not found ? */
if (!ext_key_map[i])
return;
}
switch (kbd_fct_map[scan_code]) {
case AS:
kbd_normal(scan_code);
break;
case SH:
kbd_shift(scan_code);
break;
case CN:
kbd_ctrl(scan_code);
break;
case NM:
kbd_num(scan_code);
break;
case AK:
kbd_alt(scan_code);
break;
case CP:
kbd_caps(scan_code);
break;
case ST:
kbd_scroll(scan_code);
break;
}
return;
}
static int kbd_reset(void)
{
u8 config;
/* controller self test */
if (kbd_input_empty() == 0)
return -1;
out8(I8042_CMD_REG, CMD_SELF_TEST);
if (kbd_output_full() == 0)
return -1;
if (in8(I8042_DATA_REG) != KBC_TEST_OK)
return -1;
/* keyboard reset */
if (kbd_input_empty() == 0)
return -1;
out8(I8042_DATA_REG, CMD_RESET_KBD);
if (kbd_output_full() == 0)
return -1;
if (in8(I8042_DATA_REG) != KBD_ACK)
return -1;
if (kbd_output_full() == 0)
return -1;
if (in8(I8042_DATA_REG) != KBD_POR)
return -1;
/* set AT translation and disable irq */
if (kbd_input_empty() == 0)
return -1;
out8(I8042_CMD_REG, CMD_RD_CONFIG);
if (kbd_output_full() == 0)
return -1;
config = in8(I8042_DATA_REG);
config |= CONFIG_AT_TRANS;
config &= ~(CONFIG_KIRQ_EN | CONFIG_MIRQ_EN);
if (kbd_input_empty() == 0)
return -1;
out8(I8042_CMD_REG, CMD_WR_CONFIG);
if (kbd_input_empty() == 0)
return -1;
out8(I8042_DATA_REG, config);
/* enable keyboard */
if (kbd_input_empty() == 0)
return -1;
out8(I8042_CMD_REG, CMD_KBD_EN);
if (kbd_input_empty() == 0)
return -1;
return 0;
}
static int kbd_controller_present(void)
{
return in8(I8042_STS_REG) != 0xff;
}
/*
* Implement a weak default function for boards that optionally
* need to skip the i8042 initialization.
*/
int __weak board_i8042_skip(void)
{
/* As default, don't skip */
return 0;
}
void i8042_flush(void)
{
int timeout;
/*
* The delay is to give the keyboard controller some time
* to fill the next byte.
*/
while (1) {
timeout = 100; /* wait for no longer than 100us */
while (timeout > 0 && !(in8(I8042_STS_REG) & STATUS_OBF)) {
udelay(1);
timeout--;
}
/* Try to pull next byte if not timeout */
if (in8(I8042_STS_REG) & STATUS_OBF)
in8(I8042_DATA_REG);
else
break;
}
}
int i8042_disable(void)
{
if (kbd_input_empty() == 0)
return -1;
/* Disable keyboard */
out8(I8042_CMD_REG, CMD_KBD_DIS);
if (kbd_input_empty() == 0)
return -1;
return 0;
}
/* i8042_kbd_init - reset keyboard and init state flags */
int i8042_kbd_init(void)
{
int keymap, try;
char *penv;
if (!kbd_controller_present() || board_i8042_skip()) {
debug("i8042 keyboard controller is not present\n");
return -1;
}
/* Init keyboard device (default US layout) */
keymap = KBD_US;
penv = getenv("keymap");
if (penv != NULL) {
if (strncmp(penv, "de", 3) == 0)
keymap = KBD_GER;
}
for (try = 0; try < KBD_RESET_TRIES; try++) {
if (kbd_reset() == 0) {
kbd_mapping = keymap;
kbd_flags = NORMAL;
kbd_state = 0;
kbd_led_set();
return 0;
}
}
return -1;
}
/*
* i8042_tstc - test if keyboard input is available
*
* option: cursor blinking if called in a loop
*/
int i8042_tstc(struct stdio_dev *dev)
{
unsigned char scan_code = 0;
#ifdef CONFIG_CONSOLE_CURSOR
if (--blink_count == 0) {
cursor_state ^= 1;
console_cursor(cursor_state);
blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
udelay(10);
}
#endif
if ((in8(I8042_STS_REG) & STATUS_OBF) == 0) {
return 0;
} else {
scan_code = in8(I8042_DATA_REG);
if (scan_code == 0xfa)
return 0;
kbd_conv_char(scan_code);
if (kbd_input != -1)
return 1;
}
return 0;
}
/*
* i8042_getc - wait till keyboard input is available
*
* option: turn on/off cursor while waiting
*/
int i8042_getc(struct stdio_dev *dev)
{
int ret_chr;
unsigned char scan_code;
while (kbd_input == -1) {
while ((in8(I8042_STS_REG) & STATUS_OBF) == 0) {
#ifdef CONFIG_CONSOLE_CURSOR
if (--blink_count == 0) {
cursor_state ^= 1;
console_cursor(cursor_state);
blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
}
udelay(10);
#endif
}
scan_code = in8(I8042_DATA_REG);
if (scan_code != 0xfa)
kbd_conv_char(scan_code);
}
ret_chr = kbd_input;
kbd_input = -1;
return ret_chr;
}
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