Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-18 18:59:44 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/drivers/input/i8042.c
Simon Glass 709ea543b9 stdio: Pass device pointer to stdio methods 
At present stdio device functions do not get any clue as to which stdio
device is being acted on. Some implementations go to great lengths to work
around this, such as defining a whole separate set of functions for each
possible device.

For driver model we need to associate a stdio_dev with a device. It doesn't
seem possible to continue with this work-around approach.

Instead, add a stdio_dev pointer to each of the stdio member functions.

Note: The serial drivers have the same problem, but it is not strictly
necessary to fix that to get driver model running. Also, if we convert
serial over to driver model the problem will go away.

Code size increases by 244 bytes for Thumb2 and 428 for PowerPC.

22: stdio: Pass device pointer to stdio methods
       arm: (for 2/2 boards)  all +244.0  bss -4.0  text +248.0
   powerpc: (for 1/1 boards)  all +428.0  text +428.0

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
2014-07-23 14:07:23 +01:00

706 lines
22 KiB
C
Raw Blame History

/*
* (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 <linux/compiler.h>
#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 <i8042.h>
/* 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(struct stdio_dev *dev)
{
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(struct stdio_dev *dev)
{
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;
}
Reference in a new issue View git blame Copy permalink