1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* This file is part of the coreboot project.
*
* Copyright 2014 Rockchip Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <boot/coreboot_tables.h>
#include <gpio.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include "board.h"
#define GPIO_WP GPIO(7, A, 6)
#define GPIO_POWER GPIO(0, A, 5)
#define GPIO_RECOVERY_SERVO GPIO(0, B, 1)
#define GPIO_RECOVERY_PUSHKEY GPIO(7, B, 1)
void setup_chromeos_gpios(void)
{
gpio_input(GPIO_WP);
gpio_input(GPIO_POWER);
gpio_input_pullup(GPIO_RECOVERY_SERVO);
gpio_input_pullup(GPIO_RECOVERY_PUSHKEY);
}
void fill_lb_gpios(struct lb_gpios *gpios)
{
struct lb_gpio chromeos_gpios[] = {
{GPIO_WP.raw, ACTIVE_LOW,
!get_write_protect_state(), "write protect"},
/* Note for early development, we want to support both servo
* and pushkey recovery buttons in firmware boot stages. */
{GPIO_RECOVERY_PUSHKEY.raw, ACTIVE_LOW,
!get_recovery_mode_switch(), "presence"},
{GPIO_POWER.raw, ACTIVE_LOW, -1, "power"},
{GPIO_RESET.raw, ACTIVE_HIGH, -1, "reset"},
};
lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
}
int get_recovery_mode_switch(void)
{
// Both RECOVERY_SERVO and RECOVERY_PUSHKEY are low active.
return !(gpio_get(GPIO_RECOVERY_SERVO) &&
gpio_get(GPIO_RECOVERY_PUSHKEY));
}
int get_write_protect_state(void)
{
return !gpio_get(GPIO_WP);
}
|
