path: root/drivers/video/backlight/ld9040.c

/*
 * ld9040 AMOLED LCD panel driver.
 *
 * Copyright (c) 2011 Samsung Electronics
 * Author: Donghwa Lee  <dh09.lee@samsung.com>
 * Derived from drivers/video/backlight/s6e63m0.c
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/lcd.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <linux/wait.h>

#include "ld9040_gamma.h"

#define SLEEPMSEC		0x1000
#define ENDDEF			0x2000
#define	DEFMASK			0xFF00
#define COMMAND_ONLY		0xFE
#define DATA_ONLY		0xFF

#define MIN_BRIGHTNESS		0
#define MAX_BRIGHTNESS		24

struct ld9040 {
	struct device			*dev;
	struct spi_device		*spi;
	unsigned int			power;
	unsigned int			current_brightness;

	struct lcd_device		*ld;
	struct backlight_device		*bd;
	struct lcd_platform_data	*lcd_pd;

	struct mutex			lock;
	bool  enabled;
};

static struct regulator_bulk_data supplies[] = {
	{ .supply = "vdd3", },
	{ .supply = "vci", },
};

static void ld9040_regulator_enable(struct ld9040 *lcd)
{
	int ret = 0;
	struct lcd_platform_data *pd = NULL;

	pd = lcd->lcd_pd;
	mutex_lock(&lcd->lock);
	if (!lcd->enabled) {
		ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
		if (ret)
			goto out;

		lcd->enabled = true;
	}
	msleep(pd->power_on_delay);
out:
	mutex_unlock(&lcd->lock);
}

static void ld9040_regulator_disable(struct ld9040 *lcd)
{
	int ret = 0;

	mutex_lock(&lcd->lock);
	if (lcd->enabled) {
		ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies);
		if (ret)
			goto out;

		lcd->enabled = false;
	}
out:
	mutex_unlock(&lcd->lock);
}

static const unsigned short seq_swreset[] = {
	0x01, COMMAND_ONLY,
	ENDDEF, 0x00
};

static const unsigned short seq_user_setting[] = {
	0xF0, 0x5A,

	DATA_ONLY, 0x5A,
	ENDDEF, 0x00
};

static const unsigned short seq_elvss_on[] = {
	0xB1, 0x0D,

	DATA_ONLY, 0x00,
	DATA_ONLY, 0x16,
	ENDDEF, 0x00
};

static const unsigned short seq_gtcon[] = {
	0xF7, 0x09,

	DATA_ONLY, 0x00,
	DATA_ONLY, 0x00,
	ENDDEF, 0x00
};

static const unsigned short seq_panel_condition[] = {
	0xF8, 0x05,

	DATA_ONLY, 0x65,
	DATA_ONLY, 0x96,
	DATA_ONLY, 0x71,
	DATA_ONLY, 0x7D,
	DATA_ONLY, 0x19,
	DATA_ONLY, 0x3B,
	DATA_ONLY, 0x0D,
	DATA_ONLY, 0x19,
	DATA_ONLY, 0x7E,
	DATA_ONLY, 0x0D,
	DATA_ONLY, 0xE2,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0x7E,
	DATA_ONLY, 0x7D,
	DATA_ONLY, 0x07,
	DATA_ONLY, 0x07,
	DATA_ONLY, 0x20,
	DATA_ONLY, 0x20,
	DATA_ONLY, 0x20,
	DATA_ONLY, 0x02,
	DATA_ONLY, 0x02,
	ENDDEF, 0x00
};

static const unsigned short seq_gamma_set1[] = {
	0xF9, 0x00,

	DATA_ONLY, 0xA7,
	DATA_ONLY, 0xB4,
	DATA_ONLY, 0xAE,
	DATA_ONLY, 0xBF,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0x91,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0xB2,
	DATA_ONLY, 0xB4,
	DATA_ONLY, 0xAA,
	DATA_ONLY, 0xBB,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0xAC,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0xB3,
	DATA_ONLY, 0xB1,
	DATA_ONLY, 0xAA,
	DATA_ONLY, 0xBC,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0xB3,
	ENDDEF, 0x00
};

static const unsigned short seq_gamma_ctrl[] = {
	0xFB, 0x02,

	DATA_ONLY, 0x5A,
	ENDDEF, 0x00
};

static const unsigned short seq_gamma_start[] = {
	0xF9, COMMAND_ONLY,

	ENDDEF, 0x00
};

static const unsigned short seq_apon[] = {
	0xF3, 0x00,

	DATA_ONLY, 0x00,
	DATA_ONLY, 0x00,
	DATA_ONLY, 0x0A,
	DATA_ONLY, 0x02,
	ENDDEF, 0x00
};

static const unsigned short seq_display_ctrl[] = {
	0xF2, 0x02,

	DATA_ONLY, 0x08,
	DATA_ONLY, 0x08,
	DATA_ONLY, 0x10,
	DATA_ONLY, 0x10,
	ENDDEF, 0x00
};

static const unsigned short seq_manual_pwr[] = {
	0xB0, 0x04,
	ENDDEF, 0x00
};

static const unsigned short seq_pwr_ctrl[] = {
	0xF4, 0x0A,

	DATA_ONLY, 0x87,
	DATA_ONLY, 0x25,
	DATA_ONLY, 0x6A,
	DATA_ONLY, 0x44,
	DATA_ONLY, 0x02,
	DATA_ONLY, 0x88,
	ENDDEF, 0x00
};

static const unsigned