[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / backlight / lms501kf03.c

/*
 * 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;
	}

	spi_set_drvdata(spi, 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 = spi_get_drvdata(spi);

	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
	lcd_device_unregister(lcd->ld);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int lms501kf03_suspend(struct device *dev)
{
	struct lms501kf03 *lcd = dev_get_drvdata(dev);

	dev_dbg(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 device *dev)
{
	struct lms501kf03 *lcd = dev_get_drvdata(dev);

	lcd->power = FB_BLANK_POWERDOWN;

	return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
}
#endif

static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend,
			lms501kf03_resume);

static void lms501kf03_shutdown(struct spi_device *spi)
{
	struct lms501kf03 *lcd = spi_get_drvdata(spi);

	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
}

static struct spi_driver lms501kf03_driver = {
	.driver = {
		.name	= "lms501kf03",
		.owner	= THIS_MODULE,
		.pm	= &lms501kf03_pm_ops,
	},
	.probe		= lms501kf03_probe,
	.remove		= lms501kf03_remove,
	.shutdown	= lms501kf03_shutdown,
};

module_spi_driver(lms501kf03_driver);

MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
MODULE_DESCRIPTION("lms501kf03 LCD Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
1be9ca25 JH	1	/*
	2	* lms501kf03 TFT LCD panel driver.
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* Author: Jingoo Han <jg1.han@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*/
	12
	13	#include <linux/backlight.h>
	14	#include <linux/delay.h>
	15	#include <linux/fb.h>
	16	#include <linux/gpio.h>
	17	#include <linux/lcd.h>
	18	#include <linux/module.h>
	19	#include <linux/spi/spi.h>
	20	#include <linux/wait.h>
	21
	22	#define COMMAND_ONLY 0x00
	23	#define DATA_ONLY 0x01
	24
	25	struct lms501kf03 {
	26	struct device *dev;
	27	struct spi_device *spi;
	28	unsigned int power;
	29	struct lcd_device *ld;
	30	struct lcd_platform_data *lcd_pd;
	31	};
	32
	33	static const unsigned char seq_password[] = {
	34	0xb9, 0xff, 0x83, 0x69,
	35	};
	36
	37	static const unsigned char seq_power[] = {
	38	0xb1, 0x01, 0x00, 0x34, 0x06, 0x00, 0x14, 0x14, 0x20, 0x28,
	39	0x12, 0x12, 0x17, 0x0a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
	40	};
	41
	42	static const unsigned char seq_display[] = {
	43	0xb2, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, 0xff, 0x00, 0x00,
	44	0x00, 0x00, 0x03, 0x03, 0x00, 0x01,
	45	};
	46
	47	static const unsigned char seq_rgb_if[] = {
	48	0xb3, 0x09,
	49	};
	50
	51	static const unsigned char seq_display_inv[] = {
	52	0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06,
	53	};
	54
	55	static const unsigned char seq_vcom[] = {
	56	0xb6, 0x4c, 0x2e,
	57	};
	58
	59	static const unsigned char seq_gate[] = {
	60	0xd5, 0x00, 0x05, 0x03, 0x29, 0x01, 0x07, 0x17, 0x68, 0x13,
	61	0x37, 0x20, 0x31, 0x8a, 0x46, 0x9b, 0x57, 0x13, 0x02, 0x75,
	62	0xb9, 0x64, 0xa8, 0x07, 0x0f, 0x04, 0x07,
	63	};
	64
65	static const unsigned char seq_panel[] = {
66	0xcc, 0x02,
67	};
68
69	static const unsigned char seq_col_mod[] = {
70	0x3a, 0x77,
71	};
72
73	static const unsigned char seq_w_gamma[] = {
74	0xe0, 0x00, 0x04, 0x09, 0x0f, 0x1f, 0x3f, 0x1f, 0x2f, 0x0a,
75	0x0f, 0x10, 0x16, 0x18, 0x16, 0x17, 0x0d, 0x15, 0x00, 0x04,
76	0x09, 0x0f, 0x38, 0x3f, 0x20, 0x39, 0x0a, 0x0f, 0x10, 0x16,
77	0x18, 0x16, 0x17, 0x0d, 0x15,
78	};
79
80	static const unsigned char seq_rgb_gamma[] = {
81	0xc1, 0x01, 0x03, 0x07, 0x0f, 0x1a, 0x22, 0x2c, 0x33, 0x3c,
82	0x46, 0x4f, 0x58, 0x60, 0x69, 0x71, 0x79, 0x82, 0x89, 0x92,
83	0x9a, 0xa1, 0xa9, 0xb1, 0xb9, 0xc1, 0xc9, 0xcf, 0xd6, 0xde,
84	0xe5, 0xec, 0xf3, 0xf9, 0xff, 0xdd, 0x39, 0x07, 0x1c, 0xcb,
85	0xab, 0x5f, 0x49, 0x80, 0x03, 0x07, 0x0f, 0x19, 0x20, 0x2a,
86	0x31, 0x39, 0x42, 0x4b, 0x53, 0x5b, 0x63, 0x6b, 0x73, 0x7b,
87	0x83, 0x8a, 0x92, 0x9b, 0xa2, 0xaa, 0xb2, 0xba, 0xc2, 0xca,
88	0xd0, 0xd8, 0xe1, 0xe8, 0xf0, 0xf8, 0xff, 0xf7, 0xd8, 0xbe,
89	0xa7, 0x39, 0x40, 0x85, 0x8c, 0xc0, 0x04, 0x07, 0x0c, 0x17,
90	0x1c, 0x23, 0x2b, 0x34, 0x3b, 0x43, 0x4c, 0x54, 0x5b, 0x63,
91	0x6a, 0x73, 0x7a, 0x82, 0x8a, 0x91, 0x98, 0xa1, 0xa8, 0xb0,
92	0xb7, 0xc1, 0xc9, 0xcf, 0xd9, 0xe3, 0xea, 0xf4, 0xff, 0x00,
93	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
94	};
95
96	static const unsigned char seq_up_dn[] = {
97	0x36, 0x10,
98	};
99
100	static const unsigned char seq_sleep_in[] = {
101	0x10,
102	};
103
104	static const unsigned char seq_sleep_out[] = {
105	0x11,
106	};
107
108	static const unsigned char seq_display_on[] = {
109	0x29,
110	};
111
112	static const unsigned char seq_display_off[] = {
113	0x10,
114	};
115
116	static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)
117	{
118	u16 buf[1];
119	struct spi_message msg;
120
121	struct spi_transfer xfer = {
122	.len = 2,
123	.tx_buf = buf,
124	};
125
126	buf[0] = (addr << 8) \| data;
127
128	spi_message_init(&msg);
129	spi_message_add_tail(&xfer, &msg);
130
131	return spi_sync(lcd->spi, &msg);
132	}
133
134	static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,
135	unsigned char command)
136	{
137	return lms501kf03_spi_write_byte(lcd, address, command);
138	}
139
140	static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,
141	const unsigned char *wbuf,
142	unsigned int len)
143	{
144	int ret = 0, i = 0;
145
146	while (i < len) {
147	if (i == 0)
148	ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);
149	else
150	ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);
151	if (ret)
152	break;
153	i += 1;
154	}
155
156	return ret;
157	}
158
159	static int lms501kf03_ldi_init(struct lms501kf03 *lcd)
160	{
161	int ret, i;
162	static const unsigned char *init_seq[] = {
163	seq_password,
164	seq_power,
165	seq_display,
166	seq_rgb_if,
167	seq_display_inv,
168	seq_vcom,
169	seq_gate,
170	seq_panel,
171	seq_col_mod,
172	seq_w_gamma,
173	seq_rgb_gamma,
174	seq_sleep_out,
175	};
176
177	static const unsigned int size_seq[] = {
178	ARRAY_SIZE(seq_password),
179	ARRAY_SIZE(seq_power),
180	ARRAY_SIZE(seq_display),
181	ARRAY_SIZE(seq_rgb_if),
182	ARRAY_SIZE(seq_display_inv),
183	ARRAY_SIZE(seq_vcom),
184	ARRAY_SIZE(seq_gate),
185	ARRAY_SIZE(seq_panel),
186	ARRAY_SIZE(seq_col_mod),
187	ARRAY_SIZE(seq_w_gamma),
188	ARRAY_SIZE(seq_rgb_gamma),
189	ARRAY_SIZE(seq_sleep_out),
190	};
191
192	for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
193	ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],
194	size_seq[i]);
195	if (ret)
196	break;
197	}
198	/*
199	* According to the datasheet, 120ms delay time is required.
200	* After sleep out sequence, command is blocked for 120ms.
201	* Thus, LDI should wait for 120ms.
202	*/
203	msleep(120);
204
205	return ret;
206	}
207
208	static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)
209	{
210	return lms501kf03_panel_send_sequence(lcd, seq_display_on,
211	ARRAY_SIZE(seq_display_on));
212	}
213
214	static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)
215	{
216	return lms501kf03_panel_send_sequence(lcd, seq_display_off,
217	ARRAY_SIZE(seq_display_off));
218	}
219
220	static int lms501kf03_power_is_on(int power)
221	{
222	return (power) <= FB_BLANK_NORMAL;
223	}
224
225	static int lms501kf03_power_on(struct lms501kf03 *lcd)
226	{
227	int ret = 0;
228	struct lcd_platform_data *pd;
229
230	pd = lcd->lcd_pd;
231
232	if (!pd->power_on) {
233	dev_err(lcd->dev, "power_on is NULL.\n");
234	return -EINVAL;
235	} else {
236	pd->power_on(lcd->ld, 1);
237	msleep(pd->power_on_delay);
238	}
239
240	if (!pd->reset) {
241	dev_err(lcd->dev, "reset is NULL.\n");
242	return -EINVAL;
243	} else {
244	pd->reset(lcd->ld);
245	msleep(pd->reset_delay);
246	}
247
248	ret = lms501kf03_ldi_init(lcd);
249	if (ret) {
250	dev_err(lcd->dev, "failed to initialize ldi.\n");
251	return ret;
252	}
253
254	ret = lms501kf03_ldi_enable(lcd);
255	if (ret) {
256	dev_err(lcd->dev, "failed to enable ldi.\n");
257	return ret;
258	}
259
260	return 0;
261	}
262
263	static int lms501kf03_power_off(struct lms501kf03 *lcd)
264	{
265	int ret = 0;
266	struct lcd_platform_data *pd;
267
268	pd = lcd->lcd_pd;
269
270	ret = lms501kf03_ldi_disable(lcd);
271	if (ret) {
272	dev_err(lcd->dev, "lcd setting failed.\n");
273	return -EIO;
274	}
275
276	msleep(pd->power_off_delay);
277
278	pd->power_on(lcd->ld, 0);
279
280	return 0;
281	}
282
283	static int lms501kf03_power(struct lms501kf03 *lcd, int power)
284	{
285	int ret = 0;
286
287	if (lms501kf03_power_is_on(power) &&
288	!lms501kf03_power_is_on(lcd->power))
289	ret = lms501kf03_power_on(lcd);
290	else if (!lms501kf03_power_is_on(power) &&
291	lms501kf03_power_is_on(lcd->power))
292	ret = lms501kf03_power_off(lcd);
293
294	if (!ret)
295	lcd->power = power;
296
297	return ret;
298	}
299
300	static int lms501kf03_get_power(struct lcd_device *ld)
301	{
302	struct lms501kf03 *lcd = lcd_get_data(ld);
303
304	return lcd->power;
305	}
306
307	static int lms501kf03_set_power(struct lcd_device *ld, int power)
308	{
309	struct lms501kf03 *lcd = lcd_get_data(ld);
310
311	if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
312	power != FB_BLANK_NORMAL) {
313	dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
314	return -EINVAL;
315	}
316
317	return lms501kf03_power(lcd, power);
318	}
319
320	static struct lcd_ops lms501kf03_lcd_ops = {
321	.get_power = lms501kf03_get_power,
322	.set_power = lms501kf03_set_power,
323	};
324
325	static int lms501kf03_probe(struct spi_device *spi)
326	{
327	struct lms501kf03 *lcd = NULL;
328	struct lcd_device *ld = NULL;
329	int ret = 0;
330
331	lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);
332	if (!lcd)
333	return -ENOMEM;
334
335	/* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */
336	spi->bits_per_word = 9;
337
338	ret = spi_setup(spi);
339	if (ret < 0) {
340	dev_err(&spi->dev, "spi setup failed.\n");
341	return ret;
342	}
343
344	lcd->spi = spi;
345	lcd->dev = &spi->dev;
346
347	lcd->lcd_pd = spi->dev.platform_data;
348	if (!lcd->lcd_pd) {
349	dev_err(&spi->dev, "platform data is NULL\n");
350	return -EINVAL;
351	}
352
353	ld = lcd_device_register("lms501kf03", &spi->dev, lcd,
354	&lms501kf03_lcd_ops);
355	if (IS_ERR(ld))
356	return PTR_ERR(ld);
357
358	lcd->ld = ld;
359
360	if (!lcd->lcd_pd->lcd_enabled) {
361	/*
362	* if lcd panel was off from bootloader then
363	* current lcd status is powerdown and then
364	* it enables lcd panel.
365	*/
366	lcd->power = FB_BLANK_POWERDOWN;
367
368	lms501kf03_power(lcd, FB_BLANK_UNBLANK);
369	} else {
370	lcd->power = FB_BLANK_UNBLANK;
371	}
372
281ea16a	373	spi_set_drvdata(spi, lcd);
1be9ca25 JH	374
	375	dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n");
	376
	377	return 0;
	378	}
	379
	380	static int lms501kf03_remove(struct spi_device *spi)
	381	{
281ea16a	382	struct lms501kf03 *lcd = spi_get_drvdata(spi);
1be9ca25 JH	383
	384	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
	385	lcd_device_unregister(lcd->ld);
	386
	387	return 0;
	388	}
	389
26cd2a44 JH	390	#ifdef CONFIG_PM_SLEEP
26cd2a44 JH	391	static int lms501kf03_suspend(struct device *dev)
1be9ca25	392	{
26cd2a44	393	struct lms501kf03 *lcd = dev_get_drvdata(dev);
1be9ca25	394
26cd2a44	395	dev_dbg(dev, "lcd->power = %d\n", lcd->power);
1be9ca25 JH	396
	397	/*
	398	* when lcd panel is suspend, lcd panel becomes off
	399	* regardless of status.
	400	*/
	401	return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
	402	}
	403
26cd2a44	404	static int lms501kf03_resume(struct device *dev)
1be9ca25	405	{
26cd2a44	406	struct lms501kf03 *lcd = dev_get_drvdata(dev);
1be9ca25 JH	407
	408	lcd->power = FB_BLANK_POWERDOWN;
	409
	410	return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
	411	}
1be9ca25 JH	412	#endif
1be9ca25 JH	413
26cd2a44 JH	414	static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend,
	415	lms501kf03_resume);
	416
1be9ca25 JH	417	static void lms501kf03_shutdown(struct spi_device *spi)
1be9ca25 JH	418	{
281ea16a	419	struct lms501kf03 *lcd = spi_get_drvdata(spi);
1be9ca25 JH	420
	421	lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
	422	}
	423
	424	static struct spi_driver lms501kf03_driver = {
	425	.driver = {
	426	.name = "lms501kf03",
	427	.owner = THIS_MODULE,
26cd2a44	428	.pm = &lms501kf03_pm_ops,
1be9ca25 JH	429	},
	430	.probe = lms501kf03_probe,
	431	.remove = lms501kf03_remove,
	432	.shutdown = lms501kf03_shutdown,
1be9ca25 JH	433	};
	434
	435	module_spi_driver(lms501kf03_driver);
	436
	437	MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
	438	MODULE_DESCRIPTION("lms501kf03 LCD Driver");
	439	MODULE_LICENSE("GPL");