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
62
63
64
65
66
67
68
69
70
71
|
/*
* This file is part of the coreboot project.
*
* Copyright 2018 Qualcomm 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 <device/mmio.h>
#include <types.h>
#include <gpio.h>
void gpio_configure(gpio_t gpio, uint32_t func, uint32_t pull,
uint32_t drive_str, uint32_t enable)
{
uint32_t reg_val;
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
reg_val = ((enable & GPIO_CFG_OE_BMSK) << GPIO_CFG_OE_SHFT) |
((drive_str & GPIO_CFG_DRV_BMSK) << GPIO_CFG_DRV_SHFT) |
((func & GPIO_CFG_FUNC_BMSK) << GPIO_CFG_FUNC_SHFT) |
((pull & GPIO_CFG_PULL_BMSK) << GPIO_CFG_PULL_SHFT);
write32(®s->cfg, reg_val);
}
void gpio_set(gpio_t gpio, int value)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
write32(®s->in_out, (!!value) << GPIO_IO_OUT_SHFT);
}
int gpio_get(gpio_t gpio)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
return ((read32(®s->in_out) >> GPIO_IO_IN_SHFT) &
GPIO_IO_IN_BMSK);
}
void gpio_input_pulldown(gpio_t gpio)
{
gpio_configure(gpio, GPIO_FUNC_DISABLE,
GPIO_PULL_DOWN, GPIO_2MA, GPIO_DISABLE);
}
void gpio_input_pullup(gpio_t gpio)
{
gpio_configure(gpio, GPIO_FUNC_DISABLE,
GPIO_PULL_UP, GPIO_2MA, GPIO_DISABLE);
}
void gpio_input(gpio_t gpio)
{
gpio_configure(gpio, GPIO_FUNC_DISABLE,
GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE);
}
void gpio_output(gpio_t gpio, int value)
{
gpio_set(gpio, value);
gpio_configure(gpio, GPIO_FUNC_DISABLE,
GPIO_NO_PULL, GPIO_2MA, GPIO_ENABLE);
}
|
