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/* linux/drivers/video/samsung/s3cfb_s6c1372.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* S6F1202A : 7" WSVGA Landscape LCD module driver
* S6C1372 : 7.3" WXGA Landscape LCD module driver
*
* 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/errno.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/lcd.h>
#include <plat/gpio-cfg.h>
#include "s3cfb.h"
struct s6c1372_lcd {
unsigned int power;
struct device *dev;
struct lcd_device *ld;
struct lcd_platform_data *lcd_pd;
};
static int lvds_lcd_set_power(struct lcd_device *ld, int power)
{
struct s6c1372_lcd *lcd = lcd_get_data(ld);
struct lcd_platform_data *pd = NULL;
if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
power != FB_BLANK_NORMAL) {
dev_err(&lcd->ld->dev, "power value should be 0, 1 or 4.\n");
return -EINVAL;
}
pd = lcd->lcd_pd;
if (power)
pd->power_on(lcd->ld, 0);
else
pd->power_on(lcd->ld, 1);
lcd->power = power;
return 0;
}
static int lvds_lcd_get_power(struct lcd_device *ld)
{
struct s6c1372_lcd *lcd = lcd_get_data(ld);
return lcd->power;
}
static struct lcd_ops s6c1372_ops = {
.set_power = lvds_lcd_set_power,
.get_power = lvds_lcd_get_power,
};
extern unsigned int lcdtype;
static ssize_t lcdtype_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
char temp[15];
#if defined(CONFIG_FB_S5P_S6F1202A)
/*For P2*/
if (lcdtype == 0)
sprintf(temp, "HYDIS_NT51008\n");
else if (lcdtype == 2)
sprintf(temp, "BOE_NT51008\n");
else
sprintf(temp, "SMD_S6F1202A02\n");
#else
/*For p4*/
sprintf(temp, "SMD_S6C1372\n");
#endif
strcat(buf, temp);
return strlen(buf);
}
static DEVICE_ATTR(lcd_type, 0664, lcdtype_show, NULL);
void s5c1372_ldi_enable(void)
{
#if defined(CONFIG_FB_S5P_S6C1372)
gpio_set_value(GPIO_LCD_EN, GPIO_LEVEL_HIGH);
msleep(40);
#else /* defined(CONFIG_FB_S5P_S6F1202A ) */
gpio_set_value(GPIO_LCD_EN, GPIO_LEVEL_HIGH);
gpio_set_value(GPIO_LCD_LDO_EN, GPIO_LEVEL_HIGH);
msleep(40);
/* Enable backlight PWM GPIO for P2 device. */
gpio_set_value(GPIO_LCD_BACKLIGHT_PWM, 0);
s3c_gpio_cfgpin(GPIO_LCD_BACKLIGHT_PWM, S3C_GPIO_SFN(3));
#endif
}
void s5c1372_ldi_disable(void)
{
#if defined(CONFIG_FB_S5P_S6C1372)
s3c_gpio_cfgpin(GPIO_LCD_PCLK, S3C_GPIO_OUTPUT);
s3c_gpio_setpull(GPIO_LCD_PCLK, S3C_GPIO_PULL_NONE);
gpio_set_value(GPIO_LCD_PCLK, GPIO_LEVEL_LOW);
msleep(40);
gpio_set_value(GPIO_LCD_EN, GPIO_LEVEL_LOW);
msleep(600);
#else /* defined(CONFIG_FB_S5P_S6F1202A ) */
/* Disable backlight PWM GPIO for P2 device. */
gpio_set_value(GPIO_LCD_BACKLIGHT_PWM, GPIO_LEVEL_LOW);
s3c_gpio_cfgpin(GPIO_LCD_BACKLIGHT_PWM, S3C_GPIO_OUTPUT);
/* Disable LVDS Panel Power, 1.2, 1.8, display 3.3V */
gpio_set_value(GPIO_LCD_LDO_EN, GPIO_LEVEL_LOW);
gpio_set_value(GPIO_LCD_EN, GPIO_LEVEL_LOW);
msleep(300);
#endif
}
static int __init s6c1372_probe(struct platform_device *pdev)
{
struct s6c1372_lcd *lcd;
int ret = 0;
lcd = kzalloc(sizeof(struct s6c1372_lcd), GFP_KERNEL);
if (!lcd) {
pr_err("failed to allocate for lcd\n");
ret = -ENOMEM;
goto err_alloc;
}
lcd->ld = lcd_device_register("panel", &pdev->dev, lcd, &s6c1372_ops);
if (IS_ERR(lcd->ld)) {
pr_err("failed to register lcd device\n");
ret = PTR_ERR(lcd->ld);
goto out_free_lcd;
}
lcd->lcd_pd = pdev->dev.platform_data;
if (IS_ERR(lcd->lcd_pd)) {
pr_err("no platform data for lcd, cannot attach\n");
ret = PTR_ERR(lcd->lcd_pd);
goto out_free_lcd;
}
lcd->power = 1;
ret = device_create_file(&lcd->ld->dev, &dev_attr_lcd_type);
if (ret < 0)
dev_err(&lcd->ld->dev, "failed to add sysfs entries\n");
dev_set_drvdata(&pdev->dev, lcd);
dev_info(&lcd->ld->dev, "lcd panel driver has been probed.\n");
return 0;
out_free_lcd:
kfree(lcd);
return ret;
err_alloc:
return ret;
}
static int __devexit s6c1372_remove(struct platform_device *pdev)
{
struct s6c1372_lcd *lcd = dev_get_drvdata(&pdev->dev);
lcd_device_unregister(lcd->ld);
kfree(lcd);
return 0;
}
#ifdef CONFIG_FB_S5P_S6C1372
static void s6c1372_shutdown(struct platform_device *pdev)
{
gpio_set_value(GPIO_LED_BACKLIGHT_RESET, GPIO_LEVEL_LOW);
msleep(200);
s5c1372_ldi_disable();
}
#endif
static struct platform_driver s6c1372_driver = {
.driver = {
.name = "s6c1372",
.owner = THIS_MODULE,
},
.probe = s6c1372_probe,
.remove = __exit_p(s6c1372_remove),
.suspend = NULL,
.resume = NULL,
#ifdef CONFIG_FB_S5P_S6C1372
.shutdown = s6c1372_shutdown,
#endif
};
static int __init s6c1372_init(void)
{
return platform_driver_register(&s6c1372_driver);
}
static void __exit s6c1372_exit(void)
{
platform_driver_unregister(&s6c1372_driver);
}
module_init(s6c1372_init);
module_exit(s6c1372_exit);
MODULE_AUTHOR("SAMSUNG");
MODULE_DESCRIPTION("S6C1372 LCD driver");
MODULE_LICENSE("GPL");
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