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|
/*
* cmc623_pwm Backlight Driver based on SWI Driver.
*
* Copyright (c) 2009 Samsung Electronics
* InKi Dae <inki.dae@samsung.com>
*
* Based on Sharp's Corgi Backlight Driver
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/earlysuspend.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <plat/gpio-cfg.h>
#include <plat/fb.h>
//#include <plat/regs-gpio.h>
#include "../samsung/s3cfb.h"
#define CMC623_PWM_MAX_INTENSITY 255
#define CMC623_PWM_DEFAULT_INTENSITY 255
#define MAX_LEVEL 1600
// brightness tuning
#define MAX_BRIGHTNESS_LEVEL 255
#define MID_BRIGHTNESS_LEVEL 140
#define LOW_BRIGHTNESS_LEVEL 30
#define DIM_BACKLIGHT_LEVEL 20
#define MAX_BACKLIGHT_VALUE_VA 1280 //80
#define MID_BACKLIGHT_VALUE_VA 512 //32
#define LOW_BACKLIGHT_VALUE_VA 16 //1
#define DIM_BACKLIGHT_VALUE_VA 16 //1
#define MAX_BACKLIGHT_VALUE_VA50 1168 //73
#define MID_BACKLIGHT_VALUE_VA50 464 //29
#define LOW_BACKLIGHT_VALUE_VA50 16 //1
#define DIM_BACKLIGHT_VALUE_VA50 16 //1
#define MAX_BACKLIGHT_VALUE_PLS 1312 //82
#define MID_BACKLIGHT_VALUE_PLS 528 //33
#define LOW_BACKLIGHT_VALUE_PLS 16 //1
#define DIM_BACKLIGHT_VALUE_PLS 16 //1
#define MAX_BACKLIGHT_VALUE_TN 1280 //80
#define MID_BACKLIGHT_VALUE_TN 512 //32
#define LOW_BACKLIGHT_VALUE_TN 16 //1
#define DIM_BACKLIGHT_VALUE_TN 16 //1
#define MAX_BACKLIGHT_VALUE_FFS 1504 //94
#define MID_BACKLIGHT_VALUE_FFS 608 //38
#define LOW_BACKLIGHT_VALUE_FFS 16 //1
#define DIM_BACKLIGHT_VALUE_FFS 16 //1
#define MAX_BACKLIGHT_VALUE_LCDPLS 1360 //85
#define MID_BACKLIGHT_VALUE_LCDPLS 544 //34
//#define LOW_BACKLIGHT_VALUE_LCDPLS 64 //1
//#define DIM_BACKLIGHT_VALUE_LCDPLS 64 //1
#define LOW_BACKLIGHT_VALUE_LCDPLS 16 //1
#define DIM_BACKLIGHT_VALUE_LCDPLS 16 //1
#define MAX_BACKLIGHT_VALUE_T7 1280 //80
#define MID_BACKLIGHT_VALUE_T7 512 //32
#define LOW_BACKLIGHT_VALUE_T7 16 //1
#define DIM_BACKLIGHT_VALUE_T7 16 //1
#define MAX_BACKLIGHT_VALUE_T8 1280 //80
#define MID_BACKLIGHT_VALUE_T8 512 //32
#define LOW_BACKLIGHT_VALUE_T8 16 //1
#define DIM_BACKLIGHT_VALUE_T8 16 //1
typedef enum
{
LCD_TYPE_VA,
LCD_TYPE_PLS,
LCD_TYPE_VA50,
LCD_TYPE_TN,
LCD_TYPE_FFS,
LCD_TYPE_LCDPLS,
LCD_TYPE_T7,
LCD_TYPE_T8,
LCD_TYPE_MAX,
}Lcd_Type;
extern Lcd_Type lcd_type;
#ifdef CONFIG_FB_S3C_MDNIE
extern void init_mdnie_class(void);
#endif
extern void tune_cmc623_pwm_brightness(int value);
//extern void s5p_mdine_pwm_enable(int on);
extern void qt602240_inform_first_brightness(void);
static struct early_suspend st_early_suspend;
static struct platform_device *bl_pdev;
static int current_gamma_level = MAX_LEVEL;
static int first_brightness_setting = 1;
static int cmc623_pwm_suspended;
static int current_intensity = 0;
//static DEFINE_SPINLOCK(cmc623_pwm_lock);
static DEFINE_MUTEX(cmc623_pwm_mutex);
static void cmc623_pwm_apply(struct platform_device *pdev, int level)
{
tune_cmc623_pwm_brightness(level);
current_gamma_level = level;
dev_dbg(&pdev->dev, "%s:current_gamma_level=%d\n", __func__, current_gamma_level);
}
static void cmc623_pwm_apply_brightness(struct platform_device *pdev, int level)
{
cmc623_pwm_apply(pdev, level);
dev_dbg(&pdev->dev, "%s : apply_level=%d\n", __func__, level);
// printk("%s : apply_level=%d\n", __func__, level);
}
static int cmc623_pwm_get_tune(int level)
{
int tune_value;
switch(lcd_type)
{
case LCD_TYPE_PLS:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_PLS-MID_BACKLIGHT_VALUE_PLS) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_PLS;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_PLS-LOW_BACKLIGHT_VALUE_PLS) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_PLS;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_PLS-DIM_BACKLIGHT_VALUE_PLS) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_PLS;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_PLS) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
case LCD_TYPE_LCDPLS:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_LCDPLS-MID_BACKLIGHT_VALUE_LCDPLS) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_LCDPLS;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_LCDPLS-LOW_BACKLIGHT_VALUE_LCDPLS) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_LCDPLS;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_LCDPLS-DIM_BACKLIGHT_VALUE_LCDPLS) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_LCDPLS;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_LCDPLS) / (DIM_BACKLIGHT_LEVEL);
// tune_value = DIM_BACKLIGHT_VALUE_LCDPLS;
else
tune_value = level;
break;
case LCD_TYPE_VA50:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_VA50-MID_BACKLIGHT_VALUE_VA50) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_VA50;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_VA50-LOW_BACKLIGHT_VALUE_VA50) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_VA50;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_VA50-DIM_BACKLIGHT_VALUE_VA50) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_VA50;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_VA50) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
case LCD_TYPE_FFS:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_FFS-MID_BACKLIGHT_VALUE_FFS) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_FFS;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_FFS-LOW_BACKLIGHT_VALUE_FFS) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_FFS;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_FFS-DIM_BACKLIGHT_VALUE_FFS) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_FFS;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_FFS) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
case LCD_TYPE_TN:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_TN-MID_BACKLIGHT_VALUE_TN) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_TN;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_TN-LOW_BACKLIGHT_VALUE_TN) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_TN;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_TN-DIM_BACKLIGHT_VALUE_TN) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_TN;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_TN) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
case LCD_TYPE_T7:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_T7-MID_BACKLIGHT_VALUE_T7) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_T7;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_T7-LOW_BACKLIGHT_VALUE_T7) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_T7;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_T7-DIM_BACKLIGHT_VALUE_T7) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_T7;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_T7) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
case LCD_TYPE_T8:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_T8-MID_BACKLIGHT_VALUE_T8) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_T8;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_T8-LOW_BACKLIGHT_VALUE_T8) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_T8;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_T8-DIM_BACKLIGHT_VALUE_T8) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_T8;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_T8) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
case LCD_TYPE_VA:
default:
if(level >= MID_BRIGHTNESS_LEVEL)
tune_value = (level - MID_BRIGHTNESS_LEVEL) * (MAX_BACKLIGHT_VALUE_VA-MID_BACKLIGHT_VALUE_VA) / (MAX_BRIGHTNESS_LEVEL-MID_BRIGHTNESS_LEVEL) + MID_BACKLIGHT_VALUE_VA;
else if(level >= LOW_BRIGHTNESS_LEVEL)
tune_value = (level - LOW_BRIGHTNESS_LEVEL) * (MID_BACKLIGHT_VALUE_VA-LOW_BACKLIGHT_VALUE_VA) / (MID_BRIGHTNESS_LEVEL-LOW_BRIGHTNESS_LEVEL) + LOW_BACKLIGHT_VALUE_VA;
else if(level >= DIM_BACKLIGHT_LEVEL)
tune_value = (level - DIM_BACKLIGHT_LEVEL) * (LOW_BACKLIGHT_VALUE_VA-DIM_BACKLIGHT_VALUE_VA) / (LOW_BRIGHTNESS_LEVEL-DIM_BACKLIGHT_LEVEL) + DIM_BACKLIGHT_VALUE_VA;
else if(level > 0)
tune_value = (level) * (DIM_BACKLIGHT_VALUE_VA) / (DIM_BACKLIGHT_LEVEL);
else
tune_value = level;
break;
}
return tune_value;
}
static void cmc623_pwm_backlight_ctl(struct platform_device *pdev, int intensity)
{
int tune_level;
// brightness tuning
tune_level = cmc623_pwm_get_tune(intensity);
//printk("[cmc]%d(%d)\n", intensity, tune_level);
cmc623_pwm_apply_brightness(pdev, tune_level);
}
static void cmc623_pwm_send_intensity(struct backlight_device *bd)
{
//unsigned long flags;
int intensity = bd->props.brightness;
struct platform_device *pdev = NULL;
pdev = dev_get_drvdata(&bd->dev);
if (pdev == NULL)
{
printk(KERN_ERR "%s:failed to get platform device.\n", __func__);
return;
}
if (bd->props.power != FB_BLANK_UNBLANK ||
bd->props.fb_blank != FB_BLANK_UNBLANK ||
cmc623_pwm_suspended)
{
//printk("[cmc]i:%d(c:%d)\n", intensity, current_intensity);
if(!current_intensity)
return;
msleep(1);
intensity = 0;
}
//spin_lock_irqsave(&cmc623_pwm_lock, flags);
//spin_lock(&cmc623_pwm_lock);
mutex_lock(&cmc623_pwm_mutex);
cmc623_pwm_backlight_ctl(pdev, intensity);
//spin_unlock_irqrestore(&cmc623_pwm_lock, flags);
//spin_unlock(&cmc623_pwm_lock);
mutex_unlock(&cmc623_pwm_mutex);
current_intensity = intensity;
}
static void cmc623_pwm_gpio_init()
{
// s3c_gpio_cfgpin(GPIO_LCD_CABC_PWM_R05, S3C_GPIO_SFN(3)); //mdnie pwm
// s3c_gpio_setpull(GPIO_LCD_CABC_PWM_R05, S3C_GPIO_PULL_NONE);
}
#ifdef CONFIG_PM
static int cmc623_pwm_suspend(struct platform_device *swi_dev, pm_message_t state)
{
struct backlight_device *bd = platform_get_drvdata(swi_dev);
cmc623_pwm_suspended = 1;
cmc623_pwm_send_intensity(bd);
return 0;
}
static int cmc623_pwm_resume(struct platform_device *swi_dev)
{
struct backlight_device *bd = platform_get_drvdata(swi_dev);
bd->props.brightness = CMC623_PWM_DEFAULT_INTENSITY;
cmc623_pwm_suspended = 0;
cmc623_pwm_send_intensity(bd);
return 0;
}
#else
#define cmc623_pwm_suspend NULL
#define cmc623_pwm_resume NULL
#endif
#ifdef CONFIG_HAS_EARLYSUSPEND
static void cmc623_pwm_early_suspend(struct early_suspend *h)
{
struct backlight_device *bd = platform_get_drvdata(bl_pdev);
cmc623_pwm_suspended = 1;
cmc623_pwm_send_intensity(bd);
return;
}
static void cmc623_pwm_early_resume(struct early_suspend *h)
{
struct backlight_device *bd = platform_get_drvdata(bl_pdev);
//bd->props.brightness = cmc623_pwm_DEFAULT_INTENSITY;
cmc623_pwm_suspended = 0;
cmc623_pwm_gpio_init();
cmc623_pwm_send_intensity(bd);
return;
}
#endif
static int cmc623_pwm_check_fb(struct backlight_device *bd, struct fb_info *fi)
{
if(bd->dev.parent->parent)
{
struct s3cfb_global *fbdev = platform_get_drvdata(to_platform_device(bd->dev.parent->parent));
struct s3c_platform_fb *pdata = to_platform_device(bd->dev.parent->parent)->dev.platform_data;
if(fbdev->fb[pdata->default_win] == fi)
{
printk(KERN_INFO "%s fb matched\n", __func__);
return 1;
}
}
//printk(KERN_DEBUG "%s fb unmatched\n", __func__);
return 0;
}
static int cmc623_pwm_set_intensity(struct backlight_device *bd)
{
//printk("BD->PROPS.BRIGHTNESS = %d\n", bd->props.brightness);
cmc623_pwm_send_intensity(bd);
if (first_brightness_setting) {
first_brightness_setting = 0;
/* to touch driver */
qt602240_inform_first_brightness();
}
return 0;
}
static int cmc623_pwm_get_intensity(struct backlight_device *bd)
{
return current_intensity;
}
static struct backlight_ops cmc623_pwm_ops = {
.get_brightness = cmc623_pwm_get_intensity,
.update_status = cmc623_pwm_set_intensity,
.check_fb = cmc623_pwm_check_fb,
};
//for measuring luminance
void cmc623_pwm_set_brightness(int brightness)
{
//unsigned long flags;
printk("%s: value=%d\n", __func__, brightness);
//spin_lock_irqsave(&cmc623_pwm_lock, flags);
//spin_lock(&cmc623_pwm_lock);
mutex_lock(&cmc623_pwm_mutex);
cmc623_pwm_apply_brightness(bl_pdev, brightness);
//spin_unlock_irqrestore(&cmc623_pwm_lock, flags);
//spin_unlock(&cmc623_pwm_lock);
mutex_unlock(&cmc623_pwm_mutex);
}
EXPORT_SYMBOL(cmc623_pwm_set_brightness);
static int cmc623_pwm_probe(struct platform_device *pdev)
{
struct backlight_device *bd;
printk("cmc623_pwm Probe START!!!\n");
bd = backlight_device_register("s5p_bl", &pdev->dev, pdev, &cmc623_pwm_ops, NULL);
if (IS_ERR(bd))
return PTR_ERR(bd);
platform_set_drvdata(pdev, bd);
bd->props.max_brightness = CMC623_PWM_MAX_INTENSITY;
bd->props.brightness = CMC623_PWM_DEFAULT_INTENSITY;
cmc623_pwm_gpio_init();
// s5p_mdine_pwm_enable(1);
// cmc623_pwm_set_intensity(bd);
dev_info(&pdev->dev, "cmc623_pwm backlight driver is enabled.\n");
bl_pdev = pdev;
#ifdef CONFIG_HAS_EARLYSUSPEND
st_early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
st_early_suspend.suspend = cmc623_pwm_early_suspend;
st_early_suspend.resume = cmc623_pwm_early_resume;
register_early_suspend(&st_early_suspend);
#endif /* CONFIG_HAS_EARLYSUSPEND */
#ifdef CONFIG_FB_S3C_MDNIE
// init_mdnie_class(); //set mDNIe UI mode, Outdoormode
#endif
printk("cmc623_pwm Probe END!!!\n");
return 0;
}
static int cmc623_pwm_remove(struct platform_device *pdev)
{
struct backlight_device *bd = platform_get_drvdata(pdev);
#ifdef CONFIG_HAS_EARLYSUSPEND
unregister_early_suspend(&st_early_suspend);
#endif /* CONFIG_HAS_EARLYSUSPEND */
bd->props.brightness = 0;
bd->props.power = 0;
cmc623_pwm_send_intensity(bd);
backlight_device_unregister(bd);
return 0;
}
static struct platform_driver cmc623_pwm_driver = {
.driver = {
.name = "cmc623_pwm_bl",
.owner = THIS_MODULE,
},
.probe = cmc623_pwm_probe,
.remove = cmc623_pwm_remove,
#if !(defined CONFIG_HAS_EARLYSUSPEND)
.suspend = cmc623_pwm_suspend,
.resume = cmc623_pwm_resume,
#endif
};
static int __init cmc623_pwm_init(void)
{
return platform_driver_register(&cmc623_pwm_driver);
}
static void __exit cmc623_pwm_exit(void)
{
platform_driver_unregister(&cmc623_pwm_driver);
}
module_init(cmc623_pwm_init);
module_exit(cmc623_pwm_exit);
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