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
|
/*
* Backlight Driver for Frontpath ProGear HX1050+
*
* Copyright (c) 2006 Marcin Juszkiewicz
*
* Based on Progear LCD driver by M Schacht
* <mschacht at alumni dot washington dot edu>
*
* Based on Sharp's Corgi Backlight Driver
* Based on Backlight Driver for HP Jornada 680
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/pci.h>
#define PMU_LPCR 0xB0
#define SB_MPS1 0x61
#define HW_LEVEL_MAX 0x77
#define HW_LEVEL_MIN 0x4f
static struct pci_dev *pmu_dev = NULL;
static struct pci_dev *sb_dev = NULL;
static int progearbl_set_intensity(struct backlight_device *bd)
{
int intensity = bd->props.brightness;
if (bd->props.power != FB_BLANK_UNBLANK)
intensity = 0;
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN);
return 0;
}
static int progearbl_get_intensity(struct backlight_device *bd)
{
u8 intensity;
pci_read_config_byte(pmu_dev, PMU_LPCR, &intensity);
return intensity - HW_LEVEL_MIN;
}
static const struct backlight_ops progearbl_ops = {
.get_brightness = progearbl_get_intensity,
.update_status = progearbl_set_intensity,
};
static int progearbl_probe(struct platform_device *pdev)
{
struct backlight_properties props;
u8 temp;
struct backlight_device *progear_backlight_device;
int ret;
pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, NULL);
if (!pmu_dev) {
printk("ALI M7101 PMU not found.\n");
return -ENODEV;
}
sb_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
if (!sb_dev) {
printk("ALI 1533 SB not found.\n");
ret = -ENODEV;
goto put_pmu;
}
/* Set SB_MPS1 to enable brightness control. */
pci_read_config_byte(sb_dev, SB_MPS1, &temp);
pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20);
memset(&props, 0, sizeof(struct backlight_properties));
props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
progear_backlight_device = backlight_device_register("progear-bl",
&pdev->dev, NULL,
&progearbl_ops,
&props);
if (IS_ERR(progear_backlight_device)) {
ret = PTR_ERR(progear_backlight_device);
goto put_sb;
}
platform_set_drvdata(pdev, progear_backlight_device);
progear_backlight_device->props.power = FB_BLANK_UNBLANK;
progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
progearbl_set_intensity(progear_backlight_device);
return 0;
put_sb:
pci_dev_put(sb_dev);
put_pmu:
pci_dev_put(pmu_dev);
return ret;
}
static int progearbl_remove(struct platform_device *pdev)
{
struct backlight_device *bd = platform_get_drvdata(pdev);
backlight_device_unregister(bd);
return 0;
}
static struct platform_driver progearbl_driver = {
.probe = progearbl_probe,
.remove = progearbl_remove,
.driver = {
.name = "progear-bl",
},
};
static struct platform_device *progearbl_device;
static int __init progearbl_init(void)
{
int ret = platform_driver_register(&progearbl_driver);
if (ret)
return ret;
progearbl_device = platform_device_register_simple("progear-bl", -1,
NULL, 0);
if (IS_ERR(progearbl_device)) {
platform_driver_unregister(&progearbl_driver);
return PTR_ERR(progearbl_device);
}
return 0;
}
static void __exit progearbl_exit(void)
{
pci_dev_put(pmu_dev);
pci_dev_put(sb_dev);
platform_device_unregister(progearbl_device);
platform_driver_unregister(&progearbl_driver);
}
module_init(progearbl_init);
module_exit(progearbl_exit);
MODULE_AUTHOR("Marcin Juszkiewicz <linux@hrw.one.pl>");
MODULE_DESCRIPTION("ProGear Backlight Driver");
MODULE_LICENSE("GPL");
|
