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
|
index dc5f1d3..a24bf8c 100644
--- a/arch/x86/platform/geode/alix.c
+++ b/arch/x86/platform/geode/alix.c
@@ -6,6 +6,7 @@
*
* Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
* Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
+ * and Philip Prindeville <philipp@redfish-solutions.com>
*
* TODO: There are large similarities with leds-net5501.c
* by Alessandro Zummo <a.zummo@towertech.it>
@@ -24,14 +25,47 @@
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+#include <linux/dmi.h>
#include <asm/geode.h>
-static int force = 0;
+#define BIOS_SIGNATURE_TINYBIOS 0xf0000
+#define BIOS_SIGNATURE_COREBOOT 0x500
+#define BIOS_REGION_SIZE 0x10000
+
+static bool force = 0;
module_param(force, bool, 0444);
/* FIXME: Award bios is not automatically detected as Alix platform */
MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
+static struct gpio_keys_button alix_gpio_buttons[] = {
+ {
+ .code = KEY_RESTART,
+ .gpio = 24,
+ .active_low = 1,
+ .desc = "Reset button",
+ .type = EV_KEY,
+ .wakeup = 0,
+ .debounce_interval = 100,
+ .can_disable = 0,
+ }
+};
+static struct gpio_keys_platform_data alix_buttons_data = {
+ .buttons = alix_gpio_buttons,
+ .nbuttons = ARRAY_SIZE(alix_gpio_buttons),
+ .poll_interval = 20,
+};
+
+static struct platform_device alix_buttons_dev = {
+ .name = "gpio-keys-polled",
+ .id = 1,
+ .dev = {
+ .platform_data = &alix_buttons_data,
+ }
+};
+
static struct gpio_led alix_leds[] = {
{
.name = "alix:1",
@@ -64,17 +98,22 @@ static struct platform_device alix_leds_
.dev.platform_data = &alix_leds_data,
};
+static struct __initdata platform_device *alix_devs[] = {
+ &alix_buttons_dev,
+ &alix_leds_dev,
+};
+
static void __init register_alix(void)
{
/* Setup LED control through leds-gpio driver */
- platform_device_register(&alix_leds_dev);
+ platform_add_devices(alix_devs, ARRAY_SIZE(alix_devs));
}
static int __init alix_present(unsigned long bios_phys,
const char *alix_sig,
size_t alix_sig_len)
{
- const size_t bios_len = 0x00010000;
+ const size_t bios_len = BIOS_REGION_SIZE;
const char *bios_virt;
const char *scan_end;
const char *p;
@@ -109,7 +148,8 @@ static int __init alix_present(unsigned
*a = '\0';
tail = p + alix_sig_len;
- if ((tail[0] == '2' || tail[0] == '3')) {
+ if ((tail[0] == '2' || tail[0] == '3' || tail[0] == '6')) {
+
printk(KERN_INFO
"%s: system is recognized as \"%s\"\n",
KBUILD_MODNAME, name);
@@ -120,6 +160,24 @@ static int __init alix_present(unsigned
return 0;
}
+static bool __init alix_present_dmi(void)
+{
+ const char *vendor, *product;
+
+ vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+ if (!vendor || strcmp(vendor, "PC Engines"))
+ return false;
+
+ product = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (!product || (strcmp(product, "ALIX.2D") && strcmp(product, "ALIX.6")))
+ return false;
+
+ printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
+ KBUILD_MODNAME, vendor, product);
+
+ return true;
+}
+
static int __init alix_init(void)
{
const char tinybios_sig[] = "PC Engines ALIX.";
@@ -128,8 +186,9 @@ static int __init alix_init(void)
if (!is_geode())
return 0;
- if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
- alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
+ if (alix_present(BIOS_SIGNATURE_TINYBIOS, tinybios_sig, sizeof(tinybios_sig) - 1) ||
+ alix_present(BIOS_SIGNATURE_COREBOOT, coreboot_sig, sizeof(coreboot_sig) - 1) ||
+ alix_present_dmi())
register_alix();
return 0;
|
