| /* |
| * (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) |
| { |
| /* KB 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; |
| |
| if (kbd_input_empty() == 0) |
| return -1; |
| |
| /* Set KBC mode */ |
| out8(I8042_CMD_REG, CMD_WR_CONFIG); |
| |
| if (kbd_input_empty() == 0) |
| return -1; |
| |
| out8(I8042_DATA_REG, |
| CONFIG_AT_TRANS | CONFIG_SET_BIST | CONFIG_KIRQ_EN); |
| |
| if (kbd_input_empty() == 0) |
| return -1; |
| |
| /* Enable Keyboard */ |
| out8(I8042_CMD_REG, CMD_KBD_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_AT_TRANS | CONFIG_MCLK_DIS | |
| CONFIG_KCLK_DIS | CONFIG_SET_BIST); |
| 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; |
| } |