Commit 1be9ca25 authored by Jingoo Han's avatar Jingoo Han Committed by Linus Torvalds
Browse files

backlight: add lms501kf03 LCD driver 



Add the lms501kf03 LCD panel driver.  The lms501kf03 LCD panel (800 x 480)
driver uses 3-wired SPI inteface.

[akpm@linux-foundation.org: remove unused variable `before_power']
[akpm@linux-foundation.org: make lms501kf03_shutdown() static, per Fengguang]
Signed-off-by: default avatarIlho Lee <Ilho215.lee@samsung.com>
Signed-off-by: default avatarJingoo Han <jg1.han@samsung.com>
Cc: "devendra.aaru" <devendra.aaru@gmail.com>
Cc: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 551450bb

drivers/video/backlight/Kconfig

+8 −0
Original line number Original line Diff line number Diff line
@@ -126,6 +126,14 @@ config LCD_AMS369FG06 
	  If you have an AMS369FG06 AMOLED Panel, say Y to enable its

	  If you have an AMS369FG06 AMOLED Panel, say Y to enable its

	  LCD control driver.

	  LCD control driver.





config LCD_LMS501KF03

	tristate "LMS501KF03 LCD Driver"

	depends on SPI

	default n

	help

	  If you have an LMS501KF03 LCD Panel, say Y to enable its

	  LCD control driver.



endif # LCD_CLASS_DEVICE

endif # LCD_CLASS_DEVICE





#

#

drivers/video/backlight/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -14,6 +14,7 @@ obj-$(CONFIG_LCD_TOSA) += tosa_lcd.o 
obj-$(CONFIG_LCD_S6E63M0)	+= s6e63m0.o

obj-$(CONFIG_LCD_S6E63M0)	+= s6e63m0.o

obj-$(CONFIG_LCD_LD9040)	+= ld9040.o

obj-$(CONFIG_LCD_LD9040)	+= ld9040.o

obj-$(CONFIG_LCD_AMS369FG06)	+= ams369fg06.o

obj-$(CONFIG_LCD_AMS369FG06)	+= ams369fg06.o

obj-$(CONFIG_LCD_LMS501KF03)	+= lms501kf03.o





obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o

obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o

obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o

obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o

drivers/video/backlight/lms501kf03.c

0 → 100644
+441 −0
Original line number Original line Diff line number Diff line 
/*

 * lms501kf03 TFT LCD panel driver.

 *

 * Copyright (c) 2012 Samsung Electronics Co., Ltd.

 * Author: Jingoo Han  <jg1.han@samsung.com>

 *

 * 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/lcd.h>

#include <linux/module.h>

#include <linux/spi/spi.h>

#include <linux/wait.h>



#define COMMAND_ONLY		0x00

#define DATA_ONLY		0x01



struct lms501kf03 {

	struct device			*dev;

	struct spi_device		*spi;

	unsigned int			power;

	struct lcd_device		*ld;

	struct lcd_platform_data	*lcd_pd;

};



static const unsigned char seq_password[] = {

	0xb9, 0xff, 0x83, 0x69,

};



static const unsigned char seq_power[] = {

	0xb1, 0x01, 0x00, 0x34, 0x06, 0x00, 0x14, 0x14, 0x20, 0x28,

	0x12, 0x12, 0x17, 0x0a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,

};



static const unsigned char seq_display[] = {

	0xb2, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, 0xff, 0x00, 0x00,

	0x00, 0x00, 0x03, 0x03, 0x00, 0x01,

};



static const unsigned char seq_rgb_if[] = {

	0xb3, 0x09,

};



static const unsigned char seq_display_inv[] = {

	0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06,

};



static const unsigned char seq_vcom[] = {

	0xb6, 0x4c, 0x2e,

};



static const unsigned char seq_gate[] = {

	0xd5, 0x00, 0x05, 0x03, 0x29, 0x01, 0x07, 0x17, 0x68, 0x13,

	0x37, 0x20, 0x31, 0x8a, 0x46, 0x9b, 0x57, 0x13, 0x02, 0x75,

	0xb9, 0x64, 0xa8, 0x07, 0x0f, 0x04, 0x07,

};



static const unsigned char seq_panel[] = {

	0xcc, 0x02,

};



static const unsigned char seq_col_mod[] = {

	0x3a, 0x77,

};



static const unsigned char seq_w_gamma[] = {

	0xe0, 0x00, 0x04, 0x09, 0x0f, 0x1f, 0x3f, 0x1f, 0x2f, 0x0a,

	0x0f, 0x10, 0x16, 0x18, 0x16, 0x17, 0x0d, 0x15, 0x00, 0x04,

	0x09, 0x0f, 0x38, 0x3f, 0x20, 0x39, 0x0a, 0x0f, 0x10, 0x16,

	0x18, 0x16, 0x17, 0x0d, 0x15,

};



static const unsigned char seq_rgb_gamma[] = {

	0xc1, 0x01, 0x03, 0x07, 0x0f, 0x1a, 0x22, 0x2c, 0x33, 0x3c,

	0x46, 0x4f, 0x58, 0x60, 0x69, 0x71, 0x79, 0x82, 0x89, 0x92,

	0x9a, 0xa1, 0xa9, 0xb1, 0xb9, 0xc1, 0xc9, 0xcf, 0xd6, 0xde,

	0xe5, 0xec, 0xf3, 0xf9, 0xff, 0xdd, 0x39, 0x07, 0x1c, 0xcb,

	0xab, 0x5f, 0x49, 0x80, 0x03, 0x07, 0x0f, 0x19, 0x20, 0x2a,

	0x31, 0x39, 0x42, 0x4b, 0x53, 0x5b, 0x63, 0x6b, 0x73, 0x7b,

	0x83, 0x8a, 0x92, 0x9b, 0xa2, 0xaa, 0xb2, 0xba, 0xc2, 0xca,

	0xd0, 0xd8, 0xe1, 0xe8, 0xf0, 0xf8, 0xff, 0xf7, 0xd8, 0xbe,

	0xa7, 0x39, 0x40, 0x85, 0x8c, 0xc0, 0x04, 0x07, 0x0c, 0x17,

	0x1c, 0x23, 0x2b, 0x34, 0x3b, 0x43, 0x4c, 0x54, 0x5b, 0x63,

	0x6a, 0x73, 0x7a, 0x82, 0x8a, 0x91, 0x98, 0xa1, 0xa8, 0xb0,

	0xb7, 0xc1, 0xc9, 0xcf, 0xd9, 0xe3, 0xea, 0xf4, 0xff, 0x00,

	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

};



static const unsigned char seq_up_dn[] = {

	0x36, 0x10,

};



static const unsigned char seq_sleep_in[] = {

	0x10,

};



static const unsigned char seq_sleep_out[] = {

	0x11,

};



static const unsigned char seq_display_on[] = {

	0x29,

};



static const unsigned char seq_display_off[] = {

	0x10,

};



static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)

{

	u16 buf[1];

	struct spi_message msg;



	struct spi_transfer xfer = {

		.len		= 2,

		.tx_buf		= buf,

	};



	buf[0] = (addr << 8) | data;



	spi_message_init(&msg);

	spi_message_add_tail(&xfer, &msg);



	return spi_sync(lcd->spi, &msg);

}



static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,

				unsigned char command)

{

	return lms501kf03_spi_write_byte(lcd, address, command);

}



static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,

					const unsigned char *wbuf,

					unsigned int len)

{

	int ret = 0, i = 0;



	while (i < len) {

		if (i == 0)

			ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);

		else

			ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);

		if (ret)

			break;

		i += 1;

	}



	return ret;

}



static int lms501kf03_ldi_init(struct lms501kf03 *lcd)

{

	int ret, i;

	static const unsigned char *init_seq[] = {

		seq_password,

		seq_power,

		seq_display,

		seq_rgb_if,

		seq_display_inv,

		seq_vcom,

		seq_gate,

		seq_panel,

		seq_col_mod,

		seq_w_gamma,

		seq_rgb_gamma,

		seq_sleep_out,

	};



	static const unsigned int size_seq[] = {

		ARRAY_SIZE(seq_password),

		ARRAY_SIZE(seq_power),

		ARRAY_SIZE(seq_display),

		ARRAY_SIZE(seq_rgb_if),

		ARRAY_SIZE(seq_display_inv),

		ARRAY_SIZE(seq_vcom),

		ARRAY_SIZE(seq_gate),

		ARRAY_SIZE(seq_panel),

		ARRAY_SIZE(seq_col_mod),

		ARRAY_SIZE(seq_w_gamma),

		ARRAY_SIZE(seq_rgb_gamma),

		ARRAY_SIZE(seq_sleep_out),

	};



	for (i = 0; i < ARRAY_SIZE(init_seq); i++) {

		ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],

						size_seq[i]);

		if (ret)

			break;

	}

	/*

	 * According to the datasheet, 120ms delay time is required.

	 * After sleep out sequence, command is blocked for 120ms.

	 * Thus, LDI should wait for 120ms.

	 */

	msleep(120);



	return ret;

}



static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)

{

	return lms501kf03_panel_send_sequence(lcd, seq_display_on,

					ARRAY_SIZE(seq_display_on));

}



static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)

{

	return lms501kf03_panel_send_sequence(lcd, seq_display_off,

					ARRAY_SIZE(seq_display_off));

}



static int lms501kf03_power_is_on(int power)

{

	return (power) <= FB_BLANK_NORMAL;

}



static int lms501kf03_power_on(struct lms501kf03 *lcd)

{

	int ret = 0;

	struct lcd_platform_data *pd;



	pd = lcd->lcd_pd;



	if (!pd->power_on) {

		dev_err(lcd->dev, "power_on is NULL.\n");

		return -EINVAL;

	} else {

		pd->power_on(lcd->ld, 1);

		msleep(pd->power_on_delay);

	}



	if (!pd->reset) {

		dev_err(lcd->dev, "reset is NULL.\n");

		return -EINVAL;

	} else {

		pd->reset(lcd->ld);

		msleep(pd->reset_delay);

	}



	ret = lms501kf03_ldi_init(lcd);

	if (ret) {

		dev_err(lcd->dev, "failed to initialize ldi.\n");

		return ret;

	}



	ret = lms501kf03_ldi_enable(lcd);

	if (ret) {

		dev_err(lcd->dev, "failed to enable ldi.\n");

		return ret;

	}



	return 0;

}



static int lms501kf03_power_off(struct lms501kf03 *lcd)

{

	int ret = 0;

	struct lcd_platform_data *pd;



	pd = lcd->lcd_pd;



	ret = lms501kf03_ldi_disable(lcd);

	if (ret) {

		dev_err(lcd->dev, "lcd setting failed.\n");

		return -EIO;

	}



	msleep(pd->power_off_delay);



	pd->power_on(lcd->ld, 0);



	return 0;

}



static int lms501kf03_power(struct lms501kf03 *lcd, int power)

{

	int ret = 0;



	if (lms501kf03_power_is_on(power) &&

		!lms501kf03_power_is_on(lcd->power))

		ret = lms501kf03_power_on(lcd);

	else if (!lms501kf03_power_is_on(power) &&

		lms501kf03_power_is_on(lcd->power))

		ret = lms501kf03_power_off(lcd);



	if (!ret)

		lcd->power = power;



	return ret;

}



static int lms501kf03_get_power(struct lcd_device *ld)

{

	struct lms501kf03 *lcd = lcd_get_data(ld);



	return lcd->power;

}



static int lms501kf03_set_power(struct lcd_device *ld, int power)

{

	struct lms501kf03 *lcd = lcd_get_data(ld);



	if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&

		power != FB_BLANK_NORMAL) {

		dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");

		return -EINVAL;

	}



	return lms501kf03_power(lcd, power);

}



static struct lcd_ops lms501kf03_lcd_ops = {

	.get_power = lms501kf03_get_power,

	.set_power = lms501kf03_set_power,

};



static int lms501kf03_probe(struct spi_device *spi)

{

	struct lms501kf03 *lcd = NULL;

	struct lcd_device *ld = NULL;

	int ret = 0;



	lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);

	if (!lcd)

		return -ENOMEM;



	/* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */

	spi->bits_per_word = 9;



	ret = spi_setup(spi);

	if (ret < 0) {

		dev_err(&spi->dev, "spi setup failed.\n");

		return ret;

	}



	lcd->spi = spi;

	lcd->dev = &spi->dev;



	lcd->lcd_pd = spi->dev.platform_data;

	if (!lcd->lcd_pd) {

		dev_err(&spi->dev, "platform data is NULL\n");

		return -EINVAL;

	}



	ld = lcd_device_register("lms501kf03", &spi->dev, lcd,

				&lms501kf03_lcd_ops);

	if (IS_ERR(ld))

		return PTR_ERR(ld);



	lcd->ld = ld;



	if (!lcd->lcd_pd->lcd_enabled) {

		/*

		 * if lcd panel was off from bootloader then

		 * current lcd status is powerdown and then

		 * it enables lcd panel.

		 */

		lcd->power = FB_BLANK_POWERDOWN;



		lms501kf03_power(lcd, FB_BLANK_UNBLANK);

	} else {

		lcd->power = FB_BLANK_UNBLANK;

	}



	dev_set_drvdata(&spi->dev, lcd);



	dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n");



	return 0;

}



static int lms501kf03_remove(struct spi_device *spi)

{

	struct lms501kf03 *lcd = dev_get_drvdata(&spi->dev);



	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);

	lcd_device_unregister(lcd->ld);



	return 0;

}



#if defined(CONFIG_PM)



static int lms501kf03_suspend(struct spi_device *spi, pm_message_t mesg)

{

	struct lms501kf03 *lcd = dev_get_drvdata(&spi->dev);



	dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);



	/*

	 * when lcd panel is suspend, lcd panel becomes off

	 * regardless of status.

	 */

	return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);

}



static int lms501kf03_resume(struct spi_device *spi)

{

	struct lms501kf03 *lcd = dev_get_drvdata(&spi->dev);



	lcd->power = FB_BLANK_POWERDOWN;



	return lms501kf03_power(lcd, FB_BLANK_UNBLANK);

}

#else

#define lms501kf03_suspend	NULL

#define lms501kf03_resume	NULL

#endif



static void lms501kf03_shutdown(struct spi_device *spi)

{

	struct lms501kf03 *lcd = dev_get_drvdata(&spi->dev);



	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);

}



static struct spi_driver lms501kf03_driver = {

	.driver = {

		.name	= "lms501kf03",

		.owner	= THIS_MODULE,

	},

	.probe		= lms501kf03_probe,

	.remove		= lms501kf03_remove,

	.shutdown	= lms501kf03_shutdown,

	.suspend	= lms501kf03_suspend,

	.resume		= lms501kf03_resume,

};



module_spi_driver(lms501kf03_driver);



MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");

MODULE_DESCRIPTION("lms501kf03 LCD Driver");

MODULE_LICENSE("GPL");

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