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libpayload-x86: Export keyboard modifiers 

Add function to get active keyboard modifiers.

Change-Id: Ifc7bd4aa86f20d67c5b542d0458b966e605c5499
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/18601
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patrick Rudolph 2017-03-05 17:29:18 +01:00 committed by Martin Roth
parent 1f5ebf7c8b
commit ae2cb2d3bf
2 changed files with 59 additions and 45 deletions
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96
payloads/libpayload/drivers/i8042/keyboard.c
View File

@ -41,6 +41,7 @@ struct layout_maps {
};
static struct layout_maps *map;
static int modifier = 0;
static struct layout_maps keyboard_layouts[] = {
#if IS_ENABLED(CONFIG_LP_PC_KEYBOARD_LAYOUT_US)
@ -158,11 +159,6 @@ static struct layout_maps keyboard_layouts[] = {
#endif
};
#define MOD_SHIFT (1 << 0)
#define MOD_CTRL (1 << 1)
#define MOD_CAPSLOCK (1 << 2)
#define MOD_ALT (1 << 3)
static unsigned char keyboard_cmd(unsigned char cmd)
{
i8042_write_data(cmd);
@ -177,12 +173,56 @@ int keyboard_havechar(void)
unsigned char keyboard_get_scancode(void)
{
return i8042_read_data_ps2();
unsigned char ch;
while (!keyboard_havechar()) ;
ch = i8042_read_data_ps2();
switch (ch) {
case 0x36:
case 0x2a:
modifier |= KB_MOD_SHIFT;
break;
case 0x80 | 0x36:
case 0x80 | 0x2a:
modifier &= ~KB_MOD_SHIFT;
break;
case 0x38:
modifier |= KB_MOD_ALT;
break;
case 0x80 | 0x38:
modifier &= ~KB_MOD_ALT;
break;
case 0x1d:
modifier |= KB_MOD_CTRL;
break;
case 0x80 | 0x1d:
modifier &= ~KB_MOD_CTRL;
break;
case 0x3a:
if (modifier & KB_MOD_CAPSLOCK) {
modifier &= ~KB_MOD_CAPSLOCK;
if (keyboard_cmd(0xed))
keyboard_cmd(0 << 2);
} else {
modifier |= KB_MOD_CAPSLOCK;
if (keyboard_cmd(0xed))
keyboard_cmd(1 << 2);
}
break;
}
return ch;
}
int keyboard_getmodifier(void)
{
return modifier;
}
int keyboard_getchar(void)
{
static int modifier = 0;
unsigned char ch;
int shift;
int ret = 0;
@ -191,57 +231,23 @@ int keyboard_getchar(void)
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;
if (keyboard_cmd(0xed))
keyboard_cmd(0 << 2);
} else {
modifier |= MOD_CAPSLOCK;
if (keyboard_cmd(0xed))
keyboard_cmd(1 << 2);
}
break;
}
if (!(ch & 0x80) && ch < 0x57) {
shift =
(modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0;
(modifier & KB_MOD_SHIFT) ^ (modifier & KB_MOD_CAPSLOCK) ? 1 : 0;
if (modifier & MOD_ALT)
if (modifier & KB_MOD_ALT)
shift += 2;
ret = map->map[shift][ch];
if (modifier & MOD_CTRL) {
if (modifier & KB_MOD_CTRL) {
switch (ret) {
case 'a' ... 'z':
ret &= 0x1f;
break;
case KEY_DC:
/* vulcan nerve pinch */
if ((modifier & MOD_ALT) && reset_handler)
if ((modifier & KB_MOD_ALT) && reset_handler)
reset_handler();
default:
ret = 0;

8
payloads/libpayload/include/libpayload.h
View File

@ -163,6 +163,14 @@ int keyboard_havechar(void);
unsigned char keyboard_get_scancode(void);
int keyboard_getchar(void);
int keyboard_set_layout(char *country);
int keyboard_getmodifier(void);
enum KEYBOARD_MODIFIERS {
KB_MOD_SHIFT = (1 << 0),
KB_MOD_ALT = (1 << 1),
KB_MOD_CTRL = (1 << 2),
KB_MOD_CAPSLOCK = (1 << 3),
};
/** @} */
/**