blob: bb9cc2e0a22db46f602bdf2774f92e246117e347 (
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
|
/*
* SMI handler -- mostly takes care of SMIs from the EC
*
* Copyright (C) 2014 Alexandru Gagniuc <mr.nuke.me@gmail.com>
* Subject to the GNU GPL v2, or (at your option) any later version.
*/
#include "ec.h"
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <delay.h>
#include <ec/compal/ene932/ec.h>
#include <southbridge/amd/agesa/hudson/hudson.h>
enum ec_smi_event {
EC_SMI_EVENT_IDLE = 0x80,
};
/* Tell EC to operate in APM mode. Events generate SMIs instead of SCIs */
static void ec_enter_apm_mode(void)
{
ec_kbc_write_cmd(0x59);
ec_kbc_write_ib(0xE9);
}
/* Tell EC to operate in ACPI mode, thus generating SCIs on events, not SMIs */
static void ec_enter_acpi_mode(void)
{
ec_kbc_write_cmd(0x59);
ec_kbc_write_ib(0xE8);
}
static uint8_t ec_get_smi_event(void)
{
ec_kbc_write_cmd(0x56);
return ec_kbc_read_ob();
}
static void ec_process_smi(uint8_t src)
{
/*
* Stub: We aren't processing any events yet, but reading the SMI source
* satisfies the EC in terms of responding to the event.
*/
printk(BIOS_DEBUG, "EC_SMI event 0x%x\n", src);
}
static void handle_ec_smi(void)
{
uint8_t src;
while ((src = ec_get_smi_event()) != EC_SMI_EVENT_IDLE)
ec_process_smi(src);
}
int mainboard_smi_apmc(uint8_t data)
{
switch (data) {
case ACPI_SMI_CMD_ENABLE:
printk(BIOS_DEBUG, "Enable ACPI mode\n");
ec_enter_acpi_mode();
break;
case ACPI_SMI_CMD_DISABLE:
printk(BIOS_DEBUG, "Disable ACPI mode\n");
ec_enter_apm_mode();
break;
default:
printk(BIOS_DEBUG, "Unhandled ACPI command: 0x%x\n", data);
}
return 0;
}
void mainboard_smi_gpi(uint32_t gpi_sts)
{
if (gpi_sts & (1 << EC_SMI_GEVENT))
handle_ec_smi();
}
|