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7a208463 MJ |
1 | /* |
2 | * Backlight Driver for Frontpath ProGear HX1050+ | |
3 | * | |
4 | * Copyright (c) 2006 Marcin Juszkiewicz | |
5 | * | |
6 | * Based on Progear LCD driver by M Schacht | |
7 | * <mschacht at alumni dot washington dot edu> | |
8 | * | |
9 | * Based on Sharp's Corgi Backlight Driver | |
10 | * Based on Backlight Driver for HP Jornada 680 | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/mutex.h> | |
23 | #include <linux/fb.h> | |
24 | #include <linux/backlight.h> | |
25 | #include <linux/pci.h> | |
26 | #include <asm/uaccess.h> | |
27 | ||
28 | #define PMU_LPCR 0xB0 | |
29 | #define SB_MPS1 0x61 | |
30 | #define HW_LEVEL_MAX 0x77 | |
31 | #define HW_LEVEL_MIN 0x4f | |
32 | ||
33 | static struct pci_dev *pmu_dev = NULL; | |
34 | static struct pci_dev *sb_dev = NULL; | |
35 | ||
36 | static int progearbl_set_intensity(struct backlight_device *bd) | |
37 | { | |
599a52d1 | 38 | int intensity = bd->props.brightness; |
7a208463 | 39 | |
599a52d1 | 40 | if (bd->props.power != FB_BLANK_UNBLANK) |
7a208463 | 41 | intensity = 0; |
599a52d1 | 42 | if (bd->props.fb_blank != FB_BLANK_UNBLANK) |
7a208463 MJ |
43 | intensity = 0; |
44 | ||
45 | pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | static int progearbl_get_intensity(struct backlight_device *bd) | |
51 | { | |
52 | u8 intensity; | |
53 | pci_read_config_byte(pmu_dev, PMU_LPCR, &intensity); | |
54 | ||
55 | return intensity - HW_LEVEL_MIN; | |
56 | } | |
57 | ||
599a52d1 | 58 | static struct backlight_ops progearbl_ops = { |
7a208463 MJ |
59 | .get_brightness = progearbl_get_intensity, |
60 | .update_status = progearbl_set_intensity, | |
61 | }; | |
62 | ||
63 | static int progearbl_probe(struct platform_device *pdev) | |
64 | { | |
65 | u8 temp; | |
66 | struct backlight_device *progear_backlight_device; | |
67 | ||
68 | pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, 0); | |
69 | if (!pmu_dev) { | |
70 | printk("ALI M7101 PMU not found.\n"); | |
71 | return -ENODEV; | |
72 | } | |
73 | ||
74 | sb_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, 0); | |
75 | if (!sb_dev) { | |
76 | printk("ALI 1533 SB not found.\n"); | |
77 | pci_dev_put(pmu_dev); | |
78 | return -ENODEV; | |
79 | } | |
80 | ||
81 | /* Set SB_MPS1 to enable brightness control. */ | |
82 | pci_read_config_byte(sb_dev, SB_MPS1, &temp); | |
83 | pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20); | |
84 | ||
85 | progear_backlight_device = backlight_device_register("progear-bl", | |
86 | &pdev->dev, NULL, | |
599a52d1 | 87 | &progearbl_ops); |
7a208463 MJ |
88 | if (IS_ERR(progear_backlight_device)) |
89 | return PTR_ERR(progear_backlight_device); | |
90 | ||
91 | platform_set_drvdata(pdev, progear_backlight_device); | |
92 | ||
599a52d1 RP |
93 | progear_backlight_device->props.power = FB_BLANK_UNBLANK; |
94 | progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; | |
95 | progear_backlight_device->props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN; | |
7a208463 MJ |
96 | progearbl_set_intensity(progear_backlight_device); |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int progearbl_remove(struct platform_device *pdev) | |
102 | { | |
103 | struct backlight_device *bd = platform_get_drvdata(pdev); | |
104 | backlight_device_unregister(bd); | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static struct platform_driver progearbl_driver = { | |
110 | .probe = progearbl_probe, | |
111 | .remove = progearbl_remove, | |
112 | .driver = { | |
113 | .name = "progear-bl", | |
114 | }, | |
115 | }; | |
116 | ||
117 | static struct platform_device *progearbl_device; | |
118 | ||
119 | static int __init progearbl_init(void) | |
120 | { | |
121 | int ret = platform_driver_register(&progearbl_driver); | |
122 | ||
123 | if (!ret) { | |
124 | progearbl_device = platform_device_alloc("progear-bl", -1); | |
125 | if (!progearbl_device) | |
126 | return -ENOMEM; | |
127 | ||
128 | ret = platform_device_add(progearbl_device); | |
129 | ||
130 | if (ret) { | |
131 | platform_device_put(progearbl_device); | |
132 | platform_driver_unregister(&progearbl_driver); | |
133 | } | |
134 | } | |
135 | ||
136 | return ret; | |
137 | } | |
138 | ||
139 | static void __exit progearbl_exit(void) | |
140 | { | |
141 | pci_dev_put(pmu_dev); | |
142 | pci_dev_put(sb_dev); | |
143 | ||
144 | platform_device_unregister(progearbl_device); | |
145 | platform_driver_unregister(&progearbl_driver); | |
146 | } | |
147 | ||
148 | module_init(progearbl_init); | |
149 | module_exit(progearbl_exit); | |
150 | ||
151 | MODULE_AUTHOR("Marcin Juszkiewicz <linux@hrw.one.pl>"); | |
152 | MODULE_DESCRIPTION("ProGear Backlight Driver"); | |
153 | MODULE_LICENSE("GPL"); |