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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
* Copyright (C) 2014 Vladimir Serbinenko
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <ec/acpi/ec.h>
#include <pc80/mc146818rtc.h>
#include <ec/lenovo/h8/h8.h>
#include <delay.h>
#include <southbridge/intel/bd82x6x/nvs.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/bd82x6x/me.h>
#include <northbridge/intel/sandybridge/sandybridge.h>
#include <cpu/intel/model_206ax/model_206ax.h>
#define GPE_EC_SCI 1
#define GPE_EC_WAKE 13
/* The southbridge SMI handler checks whether gnvs has a
* valid pointer before calling the trap handler
*/
extern global_nvs_t *gnvs;
static void mainboard_smm_init(void)
{
printk(BIOS_DEBUG, "initializing SMI\n");
/* Enable 0x1600/0x1600 register pair */
ec_set_bit(0x00, 0x05);
}
int mainboard_io_trap_handler(int smif)
{
static int smm_initialized;
if (!smm_initialized) {
mainboard_smm_init();
smm_initialized = 1;
}
switch (smif) {
default:
return 0;
}
/* On success, the IO Trap Handler returns 1
* On failure, the IO Trap Handler returns a value != 1 */
return 1;
}
static void mainboard_smi_brightness_up(void)
{
u8 value;
if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) < 0xf0)
pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value + 0x10) | 0xf);
}
static void mainboard_smi_brightness_down(void)
{
u8 value;
if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) > 0x10)
pci_write_config8(PCI_DEV(0, 2, 1), 0xf4,
(value - 0x10) & 0xf0);
}
static void mainboard_smi_handle_ec_sci(void)
{
u8 status = inb(EC_SC);
u8 event;
if (!(status & EC_SCI_EVT))
return;
event = ec_query();
printk(BIOS_DEBUG, "EC event %02x\n", event);
switch (event) {
case 0x14:
/* brightness up */
mainboard_smi_brightness_up();
break;
case 0x15:
/* brightness down */
mainboard_smi_brightness_down();
break;
default:
break;
}
}
void mainboard_smi_gpi(u32 gpi_sts)
{
if (gpi_sts & (1 << GPE_EC_SCI))
mainboard_smi_handle_ec_sci();
}
static int mainboard_finalized = 0;
int mainboard_smi_apmc(u8 data)
{
switch (data) {
case APM_CNT_ACPI_ENABLE:
/* use 0x1600/0x1604 to prevent races with userspace */
ec_set_ports(0x1604, 0x1600);
/* route EC_SCI to SCI */
gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
/* discard all events, and enable attention */
ec_write(0x80, 0x01);
break;
case APM_CNT_ACPI_DISABLE:
/* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
provide a EC query function */
ec_set_ports(0x66, 0x62);
/* route EC_SCI to SMI */
gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
/* discard all events, and enable attention */
ec_write(0x80, 0x01);
break;
case APM_CNT_FINALIZE:
printk(BIOS_DEBUG, "APMC: FINALIZE\n");
if (mainboard_finalized) {
printk(BIOS_DEBUG, "APMC#: Already finalized\n");
return 0;
}
intel_me_finalize_smm();
intel_pch_finalize_smm();
intel_sandybridge_finalize_smm();
intel_model_206ax_finalize_smm();
mainboard_finalized = 1;
break;
default:
break;
}
return 0;
}
void mainboard_smi_sleep(u8 slp_typ)
{
if (slp_typ == 3) {
u8 ec_wake = ec_read(0x32);
/* If EC wake events are enabled, enable wake on EC WAKE GPE. */
if (ec_wake & 0x14) {
/* Redirect EC WAKE GPE to SCI. */
gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI);
}
}
}
|
