mirror of https://gitee.com/openkylin/linux.git
144 lines
3.1 KiB
C
144 lines
3.1 KiB
C
/*
|
|
*
|
|
* LCD driver for HP Jornada 700 series (710/720/728)
|
|
* Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 or any later version as published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/lcd.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <mach/jornada720.h>
|
|
#include <mach/hardware.h>
|
|
|
|
#include <video/s1d13xxxfb.h>
|
|
|
|
#define LCD_MAX_CONTRAST 0xff
|
|
#define LCD_DEF_CONTRAST 0x80
|
|
|
|
static int jornada_lcd_get_power(struct lcd_device *ld)
|
|
{
|
|
/* LDD2 in PPC = LCD POWER */
|
|
if (PPSR & PPC_LDD2)
|
|
return FB_BLANK_UNBLANK; /* PW ON */
|
|
else
|
|
return FB_BLANK_POWERDOWN; /* PW OFF */
|
|
}
|
|
|
|
static int jornada_lcd_get_contrast(struct lcd_device *ld)
|
|
{
|
|
int ret;
|
|
|
|
if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
|
|
return 0;
|
|
|
|
jornada_ssp_start();
|
|
|
|
if (jornada_ssp_byte(GETCONTRAST) != TXDUMMY) {
|
|
dev_err(&ld->dev, "get contrast failed\n");
|
|
jornada_ssp_end();
|
|
return -ETIMEDOUT;
|
|
} else {
|
|
ret = jornada_ssp_byte(TXDUMMY);
|
|
jornada_ssp_end();
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
|
|
{
|
|
int ret;
|
|
|
|
jornada_ssp_start();
|
|
|
|
/* start by sending our set contrast cmd to mcu */
|
|
ret = jornada_ssp_byte(SETCONTRAST);
|
|
|
|
/* push the new value */
|
|
if (jornada_ssp_byte(value) != TXDUMMY) {
|
|
dev_err(&ld->dev, "set contrast failed\n");
|
|
jornada_ssp_end();
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* if we get here we can assume everything went well */
|
|
jornada_ssp_end();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jornada_lcd_set_power(struct lcd_device *ld, int power)
|
|
{
|
|
if (power != FB_BLANK_UNBLANK) {
|
|
PPSR &= ~PPC_LDD2;
|
|
PPDR |= PPC_LDD2;
|
|
} else {
|
|
PPSR |= PPC_LDD2;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct lcd_ops jornada_lcd_props = {
|
|
.get_contrast = jornada_lcd_get_contrast,
|
|
.set_contrast = jornada_lcd_set_contrast,
|
|
.get_power = jornada_lcd_get_power,
|
|
.set_power = jornada_lcd_set_power,
|
|
};
|
|
|
|
static int jornada_lcd_probe(struct platform_device *pdev)
|
|
{
|
|
struct lcd_device *lcd_device;
|
|
int ret;
|
|
|
|
lcd_device = lcd_device_register(S1D_DEVICENAME, &pdev->dev, NULL, &jornada_lcd_props);
|
|
|
|
if (IS_ERR(lcd_device)) {
|
|
ret = PTR_ERR(lcd_device);
|
|
dev_err(&pdev->dev, "failed to register device\n");
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, lcd_device);
|
|
|
|
/* lets set our default values */
|
|
jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
|
|
jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
|
|
/* give it some time to startup */
|
|
msleep(100);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jornada_lcd_remove(struct platform_device *pdev)
|
|
{
|
|
struct lcd_device *lcd_device = platform_get_drvdata(pdev);
|
|
|
|
lcd_device_unregister(lcd_device);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver jornada_lcd_driver = {
|
|
.probe = jornada_lcd_probe,
|
|
.remove = jornada_lcd_remove,
|
|
.driver = {
|
|
.name = "jornada_lcd",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(jornada_lcd_driver);
|
|
|
|
MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
|
|
MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
|
|
MODULE_LICENSE("GPL");
|