blob: 00f26fe48e4252900d6e415a4e3ab19d3f58260e (
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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdint.h>
#include <amdblocks/acpimmio.h>
#include <soc/southbridge.h>
#include <delay.h>
#define FCH_AOAC_UART_FOR_CONSOLE \
(CONFIG_UART_FOR_CONSOLE == 0 ? FCH_AOAC_DEV_UART0 \
: CONFIG_UART_FOR_CONSOLE == 1 ? FCH_AOAC_DEV_UART1 \
: CONFIG_UART_FOR_CONSOLE == 2 ? FCH_AOAC_DEV_UART2 \
: CONFIG_UART_FOR_CONSOLE == 3 ? FCH_AOAC_DEV_UART3 \
: -1)
#if FCH_AOAC_UART_FOR_CONSOLE == -1
# error Unsupported UART_FOR_CONSOLE chosen
#endif
/*
* Table of devices that need their AOAC registers enabled and waited
* upon (usually about .55 milliseconds). Instead of individual delays
* waiting for each device to become available, a single delay will be
* executed. The console UART is handled separately from this table.
*/
const static unsigned int aoac_devs[] = {
FCH_AOAC_DEV_AMBA,
FCH_AOAC_DEV_I2C2,
FCH_AOAC_DEV_I2C3,
FCH_AOAC_DEV_I2C4,
FCH_AOAC_DEV_ESPI,
};
void power_on_aoac_device(unsigned int dev)
{
uint8_t byte;
/* Power on the UART and AMBA devices */
byte = aoac_read8(AOAC_DEV_D3_CTL(dev));
byte |= FCH_AOAC_PWR_ON_DEV;
byte &= ~FCH_AOAC_TARGET_DEVICE_STATE;
byte |= FCH_AOAC_D0_INITIALIZED;
aoac_write8(AOAC_DEV_D3_CTL(dev), byte);
}
void power_off_aoac_device(unsigned int dev)
{
uint8_t byte;
/* Power off the UART and AMBA devices */
byte = aoac_read8(AOAC_DEV_D3_CTL(dev));
byte &= ~FCH_AOAC_PWR_ON_DEV;
aoac_write8(AOAC_DEV_D3_CTL(dev), byte);
}
bool is_aoac_device_enabled(unsigned int dev)
{
uint8_t byte;
byte = aoac_read8(AOAC_DEV_D3_STATE(dev));
byte &= (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE);
if (byte == (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE))
return true;
else
return false;
}
void wait_for_aoac_enabled(unsigned int dev)
{
while (!is_aoac_device_enabled(dev))
udelay(100);
}
void enable_aoac_devices(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(aoac_devs); i++)
power_on_aoac_device(aoac_devs[i]);
if (CONFIG(PICASSO_CONSOLE_UART))
power_on_aoac_device(FCH_AOAC_UART_FOR_CONSOLE);
/* Wait for AOAC devices to indicate power and clock OK */
for (i = 0; i < ARRAY_SIZE(aoac_devs); i++)
wait_for_aoac_enabled(aoac_devs[i]);
if (CONFIG(PICASSO_CONSOLE_UART))
wait_for_aoac_enabled(FCH_AOAC_UART_FOR_CONSOLE);
}
|
