3 * LCD driver for HP Jornada 700 series (710/720/728)
4 * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
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.
12 #include <linux/device.h>
14 #include <linux/kernel.h>
15 #include <linux/lcd.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/delay.h>
20 #include <mach/jornada720.h>
21 #include <mach/hardware.h>
23 #include <video/s1d13xxxfb.h>
25 #define LCD_MAX_CONTRAST 0xff
26 #define LCD_DEF_CONTRAST 0x80
28 static int jornada_lcd_get_power(struct lcd_device *ld)
30 /* LDD2 in PPC = LCD POWER */
32 return FB_BLANK_UNBLANK; /* PW ON */
34 return FB_BLANK_POWERDOWN; /* PW OFF */
37 static int jornada_lcd_get_contrast(struct lcd_device *ld)
41 if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
46 if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) {
47 ret = jornada_ssp_byte(TXDUMMY);
51 dev_err(&ld->dev, "failed to set contrast\n");
59 static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
65 /* start by sending our set contrast cmd to mcu */
66 if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) {
67 /* if successful push the new value */
68 if (jornada_ssp_byte(value) == TXDUMMY)
72 dev_err(&ld->dev, "failed to set contrast\n");
80 static int jornada_lcd_set_power(struct lcd_device *ld, int power)
82 if (power != FB_BLANK_UNBLANK) {
92 static struct lcd_ops jornada_lcd_props = {
93 .get_contrast = jornada_lcd_get_contrast,
94 .set_contrast = jornada_lcd_set_contrast,
95 .get_power = jornada_lcd_get_power,
96 .set_power = jornada_lcd_set_power,
99 static int jornada_lcd_probe(struct platform_device *pdev)
101 struct lcd_device *lcd_device;
104 lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME,
105 &pdev->dev, NULL, &jornada_lcd_props);
107 if (IS_ERR(lcd_device)) {
108 ret = PTR_ERR(lcd_device);
109 dev_err(&pdev->dev, "failed to register device\n");
113 platform_set_drvdata(pdev, lcd_device);
115 /* lets set our default values */
116 jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
117 jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
118 /* give it some time to startup */
124 static struct platform_driver jornada_lcd_driver = {
125 .probe = jornada_lcd_probe,
127 .name = "jornada_lcd",
131 module_platform_driver(jornada_lcd_driver);
133 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
134 MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
135 MODULE_LICENSE("GPL");