/* * (C) Copyright 2002 ELTEC Elektronik AG * Frank Gottschling * * SPDX-License-Identifier: GPL-2.0+ */ /* i8042.c - Intel 8042 keyboard driver routines */ /* includes */ #include #include #ifdef CONFIG_USE_CPCIDVI extern u8 gt_cpcidvi_in8(u32 offset); extern void gt_cpcidvi_out8(u32 offset, u8 data); #define in8(a) gt_cpcidvi_in8(a) #define out8(a, b) gt_cpcidvi_out8(a, b) #endif #include /* defines */ #ifdef CONFIG_CONSOLE_CURSOR extern void console_cursor(int state); static int blinkCount = 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 void kbd_conv_char(unsigned char scan_code); static void kbd_led_set(void); static void kbd_normal(unsigned char scan_code); static void kbd_shift(unsigned char scan_code); static void kbd_ctrl(unsigned char scan_code); static void kbd_num(unsigned char scan_code); static void kbd_caps(unsigned char scan_code); static void kbd_scroll(unsigned char scan_code); static void kbd_alt(unsigned char scan_code); static int kbd_input_empty(void); static int kbd_reset(void); static unsigned char kbd_fct_map[144] = { /* kbd_fct_map table for scan code */ 0, AS, AS, AS, AS, AS, AS, AS, /* scan 0- 7 */ AS, AS, AS, AS, AS, AS, AS, AS, /* scan 8- F */ 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 0- 7 */ '7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 8- F */ '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 0- 7 */ '&', '*', '(', ')', '_', '+', 0x08, '\t', /* scan 8- F */ '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 0- 7 */ 0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 8- F */ 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 0- 7 */ '7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 8- F */ '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 0 - 7 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 8 - F */ 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 0- 7 */ '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 8- F */ '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 0- 7 */ '/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 8- F */ '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 0- 7 */ 0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 8- F */ 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 0- 7 */ '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 8- F */ '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 0 - 7 */ '{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 8 - F */ '@', 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_controller_present(void) { return in8(I8042_STATUS_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_STATUS_REG) & 0x01)) { udelay(1); timeout--; } /* Try to pull next byte if not timeout. */ if (in8(I8042_STATUS_REG) & 0x01) in8(I8042_DATA_REG); else break; } } int i8042_disable(void) { if (kbd_input_empty() == 0) return -1; /* Disable keyboard */ out8(I8042_COMMAND_REG, 0xad); 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()) return -1; #ifdef CONFIG_USE_CPCIDVI penv = getenv("console"); if (penv != NULL) { if (strncmp(penv, "serial", 7) == 0) return -1; } #endif /* 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(void) { unsigned char scan_code = 0; #ifdef CONFIG_CONSOLE_CURSOR if (--blinkCount == 0) { cursor_state ^= 1; console_cursor(cursor_state); blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT; udelay(10); } #endif if ((in8(I8042_STATUS_REG) & 0x01) == 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(void) { int ret_chr; unsigned char scan_code; while (kbd_input == -1) { while ((in8(I8042_STATUS_REG) & 0x01) == 0) { #ifdef CONFIG_CONSOLE_CURSOR if (--blinkCount == 0) { cursor_state ^= 1; console_cursor(cursor_state); blinkCount = 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; } /******************************************************************************/ 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 CP: kbd_caps(scan_code); break; case ST: kbd_scroll(scan_code); break; case AK: kbd_alt(scan_code); break; } return; } /******************************************************************************/ 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_caps(unsigned char scan_code) { if ((kbd_flags & BRK) == NORMAL) { kbd_flags ^= CAPS; kbd_led_set(); /* update keyboard LED */ } } /******************************************************************************/ 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(); /* update keyboard LED */ } } /******************************************************************************/ static void kbd_scroll(unsigned char scan_code) { if ((kbd_flags & BRK) == NORMAL) { kbd_flags ^= STP; kbd_led_set(); /* update keyboard LED */ if (kbd_flags & STP) kbd_input = 0x13; else kbd_input = 0x11; } } /******************************************************************************/ 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_led_set(void) { kbd_input_empty(); out8(I8042_DATA_REG, 0xed); /* SET LED command */ kbd_input_empty(); out8(I8042_DATA_REG, (kbd_flags & 0x7)); /* LED bits only */ } /******************************************************************************/ static int kbd_input_empty(void) { int kbdTimeout = KBD_TIMEOUT * 1000; while ((in8(I8042_STATUS_REG) & I8042_STATUS_IN_DATA) && kbdTimeout--) udelay(1); return kbdTimeout != -1; } /******************************************************************************/ static int wait_until_kbd_output_full(void) { int kbdTimeout = KBD_TIMEOUT * 1000; while (((in8(I8042_STATUS_REG) & 0x01) == 0) && kbdTimeout--) udelay(1); return kbdTimeout != -1; } /******************************************************************************/ static int kbd_reset(void) { /* KB Reset */ if (kbd_input_empty() == 0) return -1; out8(I8042_DATA_REG, 0xff); if (wait_until_kbd_output_full() == 0) return -1; if (in8(I8042_DATA_REG) != 0xfa) /* ACK */ return -1; if (wait_until_kbd_output_full() == 0) return -1; if (in8(I8042_DATA_REG) != 0xaa) /* Test Pass*/ return -1; if (kbd_input_empty() == 0) return -1; /* Set KBC mode */ out8(I8042_COMMAND_REG, 0x60); if (kbd_input_empty() == 0) return -1; out8(I8042_DATA_REG, 0x45); if (kbd_input_empty() == 0) return -1; /* Enable Keyboard */ out8(I8042_COMMAND_REG, 0xae); if (kbd_input_empty() == 0) return -1; return 0; }