blob: a5a80a1d7cf43518dcf237fda9faafd83437ecb3 (
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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <stdint.h>
#include <amdblocks/acpimmio.h>
#include <southbridge/amd/cimx/sb800/SBPLATFORM.h>
#include "gpio_ftns.h"
uintptr_t find_gpio_base(void)
{
uintptr_t base_addr;
/* Get the ACPIMMIO base address */
base_addr = pm_read32(0x24);
base_addr &= 0xFFFFF000;
return base_addr;
}
void configure_gpio(uintptr_t base_addr, u8 gpio, u8 iomux_ftn, u8 setting)
{
u8 bdata;
iomux_write8(gpio, iomux_ftn);
bdata = gpio_100_read8(gpio);
bdata &= 0x07;
bdata |= setting; /* set direction and data value */
gpio_100_write8(gpio, bdata);
}
u8 read_gpio(uintptr_t base_addr, u8 gpio)
{
return (gpio_100_read8(gpio) & GPIO_DATA_IN) ? 1 : 0;
}
int get_spd_offset(void)
{
uintptr_t base_addr = find_gpio_base();
u8 spd_offset = read_gpio(base_addr, GPIO_16);
return spd_offset;
}
|
