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at_keyboard: Fix falco chromebook case.

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EC is slow, so we need few delays for it to toggle the bits correctly.

Command to enable clock and keyboard were not sent.
This commit is contained in:
Vladimir Serbinenko 2017-05-09 14:27:52 +02:00
parent 70b555a52a
commit c4b8bec5fe
2 changed files with 16 additions and 9 deletions
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23
grub-core/term/at_keyboard.c
View file

@ -40,6 +40,8 @@ grub_keyboard_controller_init (void);
static void
keyboard_controller_wait_until_ready (void)
{
/* 50 us would be enough but our current time resolution is 1ms. */
grub_millisleep (1);
while (! KEYBOARD_COMMAND_ISREADY (grub_inb (KEYBOARD_REG_STATUS)));
}
@ -50,10 +52,11 @@ wait_ack (void)
grub_uint8_t ack;
endtime = grub_get_time_ms () + 20;
do
do {
keyboard_controller_wait_until_ready ();
ack = grub_inb (KEYBOARD_REG_DATA);
while (ack != GRUB_AT_ACK && ack != GRUB_AT_NACK
&& grub_get_time_ms () < endtime);
} while (ack != GRUB_AT_ACK && ack != GRUB_AT_NACK
&& grub_get_time_ms () < endtime);
return ack;
}
@ -135,12 +138,10 @@ query_mode (void)
if (!e)
return 0;
keyboard_controller_wait_until_ready ();
do
do {
keyboard_controller_wait_until_ready ();
ret = grub_inb (KEYBOARD_REG_DATA);
while (ret == GRUB_AT_ACK);
} while (ret == GRUB_AT_ACK);
/* QEMU translates the set even in no-translate mode. */
if (ret == 0x43 || ret == 1)
return 1;
@ -169,7 +170,11 @@ set_scancodes (void)
#else
grub_keyboard_controller_write (grub_keyboard_controller_orig
& ~KEYBOARD_AT_TRANSLATE);
& ~KEYBOARD_AT_TRANSLATE
& ~KEYBOARD_AT_DISABLE);
keyboard_controller_wait_until_ready ();
grub_outb (KEYBOARD_COMMAND_ENABLE, KEYBOARD_REG_DATA);
write_mode (2);
ps2_state.current_set = query_mode ();

2
include/grub/at_keyboard.h
View file

@ -23,9 +23,11 @@
#define KEYBOARD_COMMAND_ISREADY(x) !((x) & 0x02)
#define KEYBOARD_COMMAND_READ 0x20
#define KEYBOARD_COMMAND_WRITE 0x60
#define KEYBOARD_COMMAND_ENABLE 0xf4
#define KEYBOARD_COMMAND_REBOOT 0xfe
#define KEYBOARD_AT_TRANSLATE 0x40
#define KEYBOARD_AT_DISABLE 0x10
#define KEYBOARD_ISMAKE(x) !((x) & 0x80)
#define KEYBOARD_ISREADY(x) ((x) & 0x01)