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
|
/*
* This file is part of the coreboot project.
*
*
* 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 <stdint.h>
#include <amdblocks/acpimmio.h>
#include <console/console.h>
#include <device/mmio.h>
#include <FchPlatform.h>
#include "gpio_ftns.h"
static u32 gpio_read_wrapper(u32 gpio)
{
if (gpio < 0x100)
return gpio0_read32(gpio & 0xff);
else if (gpio >= 0x100 && gpio < 0x200)
return gpio1_read32(gpio & 0xff);
else if (gpio >= 0x200 && gpio < 0x300)
return gpio2_read32(gpio & 0xff);
die("Invalid GPIO");
}
static void gpio_write_wrapper(u32 gpio, u32 setting)
{
if (gpio < 0x100)
gpio0_write32(gpio & 0xff, setting);
else if (gpio >= 0x100 && gpio < 0x200)
gpio1_write32(gpio & 0xff, setting);
else if (gpio >= 0x200 && gpio < 0x300)
gpio2_write32(gpio & 0xff, setting);
}
void configure_gpio(u8 iomux_gpio, u8 iomux_ftn, u32 gpio, u32 setting)
{
u32 bdata;
bdata = gpio_read_wrapper(gpio);
/* out the data value to prevent glitches */
bdata |= (setting & GPIO_OUTPUT_ENABLE);
gpio_write_wrapper(gpio, bdata);
/* set direction and data value */
bdata |= (setting & (GPIO_OUTPUT_ENABLE | GPIO_OUTPUT_VALUE
| GPIO_PULL_UP_ENABLE | GPIO_PULL_DOWN_ENABLE));
gpio_write_wrapper(gpio, bdata);
iomux_write8(iomux_gpio, iomux_ftn & 0x3);
}
u8 read_gpio(u32 gpio)
{
return (gpio_read_wrapper(gpio) & GPIO_PIN_STS) ? 1 : 0;
}
void write_gpio(u32 gpio, u8 value)
{
u32 status = gpio_read_wrapper(gpio);
status &= ~GPIO_OUTPUT_VALUE;
status |= (value > 0) ? GPIO_OUTPUT_VALUE : 0;
gpio_write_wrapper(gpio, status);
}
int get_spd_offset(void)
{
u8 index = 0;
/*
* One SPD file contains all 4 options, determine which index to
* read here, then call into the standard routines.
*/
if (gpio1_read8(0x02) & BIT0)
index |= BIT0;
if (gpio1_read8(0x06) & BIT0)
index |= BIT1;
return index;
}
|
