diff options
author | Kristoffer Ericson <kristoffer.ericson@gmail.com> | 2009-02-18 06:50:43 -0500 |
---|---|---|
committer | Richard Purdie <rpurdie@linux.intel.com> | 2009-04-06 11:06:55 -0400 |
commit | 13a7b5dc0d1768c8ae817e43cbe50597090b650a (patch) | |
tree | 64d9934f67c12b7ce0fa5603c10e5686c45e3d9c /drivers/video/backlight | |
parent | 9e124435c772c650457a952b27bcbdb9a95d48d0 (diff) |
backlight: Adds HP Jornada 700 series backlight driver
Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'drivers/video/backlight')
-rw-r--r-- | drivers/video/backlight/Kconfig | 9 | ||||
-rw-r--r-- | drivers/video/backlight/Makefile | 1 | ||||
-rw-r--r-- | drivers/video/backlight/jornada720_bl.c | 161 |
3 files changed, 171 insertions, 0 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 1064f69e1e87..f9d19be05540 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig | |||
@@ -166,6 +166,15 @@ config BACKLIGHT_HP680 | |||
166 | If you have a HP Jornada 680, say y to enable the | 166 | If you have a HP Jornada 680, say y to enable the |
167 | backlight driver. | 167 | backlight driver. |
168 | 168 | ||
169 | config BACKLIGHT_HP700 | ||
170 | tristate "HP Jornada 700 series Backlight Driver" | ||
171 | depends on BACKLIGHT_CLASS_DEVICE | ||
172 | depends on SA1100_JORNADA720_SSP && !PREEMPT | ||
173 | default y | ||
174 | help | ||
175 | If you have an HP Jornada 700 series, | ||
176 | say Y to include backlight control driver. | ||
177 | |||
169 | config BACKLIGHT_PROGEAR | 178 | config BACKLIGHT_PROGEAR |
170 | tristate "Frontpath ProGear Backlight Driver" | 179 | tristate "Frontpath ProGear Backlight Driver" |
171 | depends on BACKLIGHT_CLASS_DEVICE && PCI && X86 | 180 | depends on BACKLIGHT_CLASS_DEVICE && PCI && X86 |
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index c508075157b2..4eb178c1d684 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile | |||
@@ -13,6 +13,7 @@ obj-$(CONFIG_LCD_TOSA) += tosa_lcd.o | |||
13 | obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o | 13 | obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o |
14 | obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o | 14 | obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o |
15 | obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o | 15 | obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o |
16 | obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o | ||
16 | obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o | 17 | obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o |
17 | obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o | 18 | obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o |
18 | obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o | 19 | obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o |
diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c new file mode 100644 index 000000000000..c3ebb6b41ce1 --- /dev/null +++ b/drivers/video/backlight/jornada720_bl.c | |||
@@ -0,0 +1,161 @@ | |||
1 | /* | ||
2 | * | ||
3 | * Backlight driver for HP Jornada 700 series (710/720/728) | ||
4 | * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com> | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License version | ||
8 | * 2 or any later version as published by the Free Software Foundation. | ||
9 | * | ||
10 | */ | ||
11 | |||
12 | #include <linux/backlight.h> | ||
13 | #include <linux/device.h> | ||
14 | #include <linux/fb.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/module.h> | ||
17 | #include <linux/platform_device.h> | ||
18 | |||
19 | #include <mach/jornada720.h> | ||
20 | #include <mach/hardware.h> | ||
21 | |||
22 | #include <video/s1d13xxxfb.h> | ||
23 | |||
24 | #define BL_MAX_BRIGHT 255 | ||
25 | #define BL_DEF_BRIGHT 25 | ||
26 | |||
27 | static int jornada_bl_get_brightness(struct backlight_device *bd) | ||
28 | { | ||
29 | int ret; | ||
30 | |||
31 | /* check if backlight is on */ | ||
32 | if (!(PPSR & PPC_LDD1)) | ||
33 | return 0; | ||
34 | |||
35 | jornada_ssp_start(); | ||
36 | |||
37 | /* cmd should return txdummy */ | ||
38 | ret = jornada_ssp_byte(GETBRIGHTNESS); | ||
39 | |||
40 | if (jornada_ssp_byte(GETBRIGHTNESS) != TXDUMMY) { | ||
41 | printk(KERN_ERR "bl : get brightness timeout\n"); | ||
42 | jornada_ssp_end(); | ||
43 | return -ETIMEDOUT; | ||
44 | } else /* exchange txdummy for value */ | ||
45 | ret = jornada_ssp_byte(TXDUMMY); | ||
46 | |||
47 | jornada_ssp_end(); | ||
48 | |||
49 | return (BL_MAX_BRIGHT - ret); | ||
50 | } | ||
51 | |||
52 | static int jornada_bl_update_status(struct backlight_device *bd) | ||
53 | { | ||
54 | int ret = 0; | ||
55 | |||
56 | jornada_ssp_start(); | ||
57 | |||
58 | /* If backlight is off then really turn it off */ | ||
59 | if ((bd->props.power != FB_BLANK_UNBLANK) || (bd->props.fb_blank != FB_BLANK_UNBLANK)) { | ||
60 | ret = jornada_ssp_byte(BRIGHTNESSOFF); | ||
61 | if (ret != TXDUMMY) { | ||
62 | printk(KERN_INFO "bl : brightness off timeout\n"); | ||
63 | /* turn off backlight */ | ||
64 | PPSR &= ~PPC_LDD1; | ||
65 | PPDR |= PPC_LDD1; | ||
66 | ret = -ETIMEDOUT; | ||
67 | } | ||
68 | } else /* turn on backlight */ | ||
69 | PPSR |= PPC_LDD1; | ||
70 | |||
71 | /* send command to our mcu */ | ||
72 | if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) { | ||
73 | printk(KERN_INFO "bl : failed to set brightness\n"); | ||
74 | ret = -ETIMEDOUT; | ||
75 | goto out | ||
76 | } | ||
77 | |||
78 | /* at this point we expect that the mcu has accepted | ||
79 | our command and is waiting for our new value | ||
80 | please note that maximum brightness is 255, | ||
81 | but due to physical layout it is equal to 0, so we simply | ||
82 | invert the value (MAX VALUE - NEW VALUE). */ | ||
83 | if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness) != TXDUMMY) { | ||
84 | printk(KERN_ERR "bl : set brightness failed\n"); | ||
85 | ret = -ETIMEDOUT; | ||
86 | } | ||
87 | |||
88 | /* If infact we get an TXDUMMY as output we are happy and dont | ||
89 | make any further comments about it */ | ||
90 | out: | ||
91 | jornada_ssp_end(); | ||
92 | |||
93 | return ret; | ||
94 | } | ||
95 | |||
96 | static struct backlight_ops jornada_bl_ops = { | ||
97 | .get_brightness = jornada_bl_get_brightness, | ||
98 | .update_status = jornada_bl_update_status, | ||
99 | .options = BL_CORE_SUSPENDRESUME, | ||
100 | }; | ||
101 | |||
102 | static int jornada_bl_probe(struct platform_device *pdev) | ||
103 | { | ||
104 | int ret; | ||
105 | struct backlight_device *bd; | ||
106 | |||
107 | bd = backlight_device_register(S1D_DEVICENAME, &pdev->dev, NULL, &jornada_bl_ops); | ||
108 | |||
109 | if (IS_ERR(bd)) { | ||
110 | ret = PTR_ERR(bd); | ||
111 | printk(KERN_ERR "bl : failed to register device, err=%x\n", ret); | ||
112 | return ret; | ||
113 | } | ||
114 | |||
115 | bd->props.power = FB_BLANK_UNBLANK; | ||
116 | bd->props.brightness = BL_DEF_BRIGHT; | ||
117 | /* note. make sure max brightness is set otherwise | ||
118 | you will get seemingly non-related errors when | ||
119 | trying to change brightness */ | ||
120 | bd->props.max_brightness = BL_MAX_BRIGHT; | ||
121 | jornada_bl_update_status(bd); | ||
122 | |||
123 | platform_set_drvdata(pdev, bd); | ||
124 | printk(KERN_INFO "HP Jornada 700 series backlight driver\n"); | ||
125 | |||
126 | return 0; | ||
127 | } | ||
128 | |||
129 | static int jornada_bl_remove(struct platform_device *pdev) | ||
130 | { | ||
131 | struct backlight_device *bd = platform_get_drvdata(pdev); | ||
132 | |||
133 | backlight_device_unregister(bd); | ||
134 | |||
135 | return 0; | ||
136 | } | ||
137 | |||
138 | static struct platform_driver jornada_bl_driver = { | ||
139 | .probe = jornada_bl_probe, | ||
140 | .remove = jornada_bl_remove, | ||
141 | .driver = { | ||
142 | .name = "jornada_bl", | ||
143 | }, | ||
144 | }; | ||
145 | |||
146 | int __init jornada_bl_init(void) | ||
147 | { | ||
148 | return platform_driver_register(&jornada_bl_driver); | ||
149 | } | ||
150 | |||
151 | void __exit jornada_bl_exit(void) | ||
152 | { | ||
153 | platform_driver_unregister(&jornada_bl_driver); | ||
154 | } | ||
155 | |||
156 | MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson>"); | ||
157 | MODULE_DESCRIPTION("HP Jornada 710/720/728 Backlight driver"); | ||
158 | MODULE_LICENSE("GPL"); | ||
159 | |||
160 | module_init(jornada_bl_init); | ||
161 | module_exit(jornada_bl_exit); | ||