summaryrefslogtreecommitdiff
path: root/src/soc/qualcomm/sc7180/gpio.c
blob: 38d81f157e060cdda3880e503fe1c9c41664108f (plain)
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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */

#include <assert.h>
#include <delay.h>
#include <device/mmio.h>
#include <timer.h>
#include <timestamp.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;

	/* gpio pull only PULLNONE, PULLUP, KEEPER, PULLDOWN status */
	assert(pull <= GPIO_PULL_UP);

	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(&regs->cfg, reg_val);
}

void gpio_set(gpio_t gpio, int value)
{
	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;

	write32(&regs->in_out, (!!value) << GPIO_IO_OUT_SHFT);
}

int gpio_get(gpio_t gpio)
{
	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;

	return ((read32(&regs->in_out) >> GPIO_IO_IN_SHFT) &
		GPIO_IO_IN_BMSK);
}

void gpio_input_pulldown(gpio_t gpio)
{
	gpio_configure(gpio, GPIO_FUNC_GPIO,
				GPIO_PULL_DOWN, GPIO_2MA, GPIO_OUTPUT_DISABLE);
}

void gpio_input_pullup(gpio_t gpio)
{
	gpio_configure(gpio, GPIO_FUNC_GPIO,
				GPIO_PULL_UP, GPIO_2MA, GPIO_OUTPUT_DISABLE);
}

void gpio_input(gpio_t gpio)
{
	gpio_configure(gpio, GPIO_FUNC_GPIO,
				GPIO_NO_PULL, GPIO_2MA, GPIO_OUTPUT_DISABLE);
}

void gpio_output(gpio_t gpio, int value)
{
	gpio_set(gpio, value);
	gpio_configure(gpio, GPIO_FUNC_GPIO,
				GPIO_NO_PULL, GPIO_2MA, GPIO_OUTPUT_ENABLE);
}

void gpio_input_irq(gpio_t gpio, enum gpio_irq_type type, uint32_t pull)
{
	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;

	gpio_configure(gpio, GPIO_FUNC_GPIO,
			pull, GPIO_2MA, GPIO_OUTPUT_DISABLE);

	clrsetbits32(&regs->intr_cfg, GPIO_INTR_DECT_CTL_MASK <<
		GPIO_INTR_DECT_CTL_SHIFT, type << GPIO_INTR_DECT_CTL_SHIFT);
	clrsetbits32(&regs->intr_cfg, GPIO_INTR_RAW_STATUS_ENABLE
		<< GPIO_INTR_RAW_STATUS_EN_SHIFT, GPIO_INTR_RAW_STATUS_ENABLE
					<< GPIO_INTR_RAW_STATUS_EN_SHIFT);
}

int gpio_irq_status(gpio_t gpio)
{
	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;

	if (!(read32(&regs->intr_status) & GPIO_INTR_STATUS_MASK))
		return 0;

	write32(&regs->intr_status, GPIO_INTR_STATUS_DISABLE);
	return 1;
}