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Commit dd89ccb2 authored by Eric Miao's avatar Eric Miao Committed by Russell King
Browse files

lcd: add support for Toppoly TDO24M series LCD panels 



This type of LCD panel can be found on PXA3xx/Littleton platforms.
Add LCD device and SPI-based driver for this.

Signed-off-by: default avatarEric Miao <eric.miao@marvell.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent bfdcaa3b

drivers/video/backlight/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -51,6 +51,14 @@ config LCD_ILI9320 
	  If you have a panel based on the ILI9320 controller chip

	  then say y to include a power driver for it.



config LCD_TDO24M

	tristate "Toppoly TDO24M LCD Panels support"

	depends on LCD_CLASS_DEVICE && SPI_MASTER

	default n

	help

	  If you have a Toppoly TDO24M series LCD panel, say y here to

	  include the support for it.



config LCD_VGG2432A4

	tristate "VGG2432A4 LCM device support"

	depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER

drivers/video/backlight/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o 
obj-$(CONFIG_LCD_ILI9320)	   += ili9320.o

obj-$(CONFIG_LCD_PLATFORM)	   += platform_lcd.o

obj-$(CONFIG_LCD_VGG2432A4)	   += vgg2432a4.o

obj-$(CONFIG_LCD_TDO24M)	   += tdo24m.o



obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o

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

drivers/video/backlight/tdo24m.c

0 → 100644
+396 −0
Original line number Diff line number Diff line 
/*

 * tdo24m - SPI-based drivers for Toppoly TDO24M series LCD panels

 *

 * Copyright (C) 2008 Marvell International Ltd.

 * 	Eric Miao <eric.miao@marvell.com>

 *

 *  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

 *  publishhed by the Free Software Foundation.

 */



#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/spi/spi.h>

#include <linux/fb.h>

#include <linux/lcd.h>



#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)



#define TDO24M_SPI_BUFF_SIZE	(4)

#define MODE_QVGA	0

#define MODE_VGA	1



struct tdo24m {

	struct spi_device	*spi_dev;

	struct lcd_device	*lcd_dev;



	struct spi_message	msg;

	struct spi_transfer	xfer;

	uint8_t			*buf;



	int			power;

	int			mode;

};



/* use bit 30, 31 as the indicator of command parameter number */

#define CMD0(x)		((0 << 30) | (x))

#define CMD1(x, x1)	((1 << 30) | ((x) << 9) | 0x100 | (x1))

#define CMD2(x, x1, x2)	((2 << 30) | ((x) << 18) | 0x20000 |\

			((x1) << 9) | 0x100 | (x2))

#define CMD_NULL	(-1)



static uint32_t lcd_panel_reset[] = {

	CMD0(0x1), /* reset */

	CMD0(0x0), /* nop */

	CMD0(0x0), /* nop */

	CMD0(0x0), /* nop */

	CMD_NULL,

};



static uint32_t lcd_panel_on[] = {

	CMD0(0x29),		/* Display ON */

	CMD2(0xB8, 0xFF, 0xF9),	/* Output Control */

	CMD0(0x11),		/* Sleep out */

	CMD1(0xB0, 0x16),	/* Wake */

	CMD_NULL,

};



static uint32_t lcd_panel_off[] = {

	CMD0(0x28),		/* Display OFF */

	CMD2(0xB8, 0x80, 0x02),	/* Output Control */

	CMD0(0x10),		/* Sleep in */

	CMD1(0xB0, 0x00),	/* Deep stand by in */

	CMD_NULL,

};



static uint32_t lcd_vga_pass_through[] = {

	CMD1(0xB0, 0x16),

	CMD1(0xBC, 0x80),

	CMD1(0xE1, 0x00),

	CMD1(0x36, 0x50),

	CMD1(0x3B, 0x00),

	CMD_NULL,

};



static uint32_t lcd_qvga_pass_through[] = {

	CMD1(0xB0, 0x16),

	CMD1(0xBC, 0x81),

	CMD1(0xE1, 0x00),

	CMD1(0x36, 0x50),

	CMD1(0x3B, 0x22),

	CMD_NULL,

};



static uint32_t lcd_vga_transfer[] = {

	CMD1(0xcf, 0x02), 	/* Blanking period control (1) */

	CMD2(0xd0, 0x08, 0x04),	/* Blanking period control (2) */

	CMD1(0xd1, 0x01),	/* CKV timing control on/off */

	CMD2(0xd2, 0x14, 0x00),	/* CKV 1,2 timing control */

	CMD2(0xd3, 0x1a, 0x0f),	/* OEV timing control */

	CMD2(0xd4, 0x1f, 0xaf),	/* ASW timing control (1) */

	CMD1(0xd5, 0x14),	/* ASW timing control (2) */

	CMD0(0x21),		/* Invert for normally black display */

	CMD0(0x29),		/* Display on */

	CMD_NULL,

};



static uint32_t lcd_qvga_transfer[] = {

	CMD1(0xd6, 0x02),	/* Blanking period control (1) */

	CMD2(0xd7, 0x08, 0x04),	/* Blanking period control (2) */

	CMD1(0xd8, 0x01),	/* CKV timing control on/off */

	CMD2(0xd9, 0x00, 0x08),	/* CKV 1,2 timing control */

	CMD2(0xde, 0x05, 0x0a),	/* OEV timing control */

	CMD2(0xdf, 0x0a, 0x19),	/* ASW timing control (1) */

	CMD1(0xe0, 0x0a),	/* ASW timing control (2) */

	CMD0(0x21),		/* Invert for normally black display */

	CMD0(0x29),		/* Display on */

	CMD_NULL,

};



static uint32_t lcd_panel_config[] = {

	CMD2(0xb8, 0xff, 0xf9),	/* Output control */

	CMD0(0x11),		/* sleep out */

	CMD1(0xba, 0x01),	/* Display mode (1) */

	CMD1(0xbb, 0x00),	/* Display mode (2) */

	CMD1(0x3a, 0x60),	/* Display mode 18-bit RGB */

	CMD1(0xbf, 0x10),	/* Drive system change control */

	CMD1(0xb1, 0x56),	/* Booster operation setup */

	CMD1(0xb2, 0x33),	/* Booster mode setup */

	CMD1(0xb3, 0x11),	/* Booster frequency setup */

	CMD1(0xb4, 0x02),	/* Op amp/system clock */

	CMD1(0xb5, 0x35),	/* VCS voltage */

	CMD1(0xb6, 0x40),	/* VCOM voltage */

	CMD1(0xb7, 0x03),	/* External display signal */

	CMD1(0xbd, 0x00),	/* ASW slew rate */

	CMD1(0xbe, 0x00),	/* Dummy data for QuadData operation */

	CMD1(0xc0, 0x11),	/* Sleep out FR count (A) */

	CMD1(0xc1, 0x11),	/* Sleep out FR count (B) */

	CMD1(0xc2, 0x11),	/* Sleep out FR count (C) */

	CMD2(0xc3, 0x20, 0x40),	/* Sleep out FR count (D) */

	CMD2(0xc4, 0x60, 0xc0),	/* Sleep out FR count (E) */

	CMD2(0xc5, 0x10, 0x20),	/* Sleep out FR count (F) */

	CMD1(0xc6, 0xc0),	/* Sleep out FR count (G) */

	CMD2(0xc7, 0x33, 0x43),	/* Gamma 1 fine tuning (1) */

	CMD1(0xc8, 0x44),	/* Gamma 1 fine tuning (2) */

	CMD1(0xc9, 0x33),	/* Gamma 1 inclination adjustment */

	CMD1(0xca, 0x00),	/* Gamma 1 blue offset adjustment */

	CMD2(0xec, 0x01, 0xf0),	/* Horizontal clock cycles */

	CMD_NULL,

};



static int tdo24m_writes(struct tdo24m *lcd, uint32_t *array)

{

	struct spi_transfer *x = &lcd->xfer;

	uint32_t data, *p = array;

	int nparams, err = 0;



	for (; *p != CMD_NULL; p++) {



		nparams = (*p >> 30) & 0x3;



		data = *p << (7 - nparams);

		switch (nparams) {

		case 0:

			lcd->buf[0] = (data >> 8) & 0xff;

			lcd->buf[1] = data & 0xff;

			break;

		case 1:

			lcd->buf[0] = (data >> 16) & 0xff;

			lcd->buf[1] = (data >> 8) & 0xff;

			lcd->buf[2] = data & 0xff;

			break;

		case 2:

			lcd->buf[0] = (data >> 24) & 0xff;

			lcd->buf[1] = (data >> 16) & 0xff;

			lcd->buf[2] = (data >> 8) & 0xff;

			lcd->buf[3] = data & 0xff;

			break;

		default:

			continue;

		}

		x->len = nparams + 2;

		err = spi_sync(lcd->spi_dev, &lcd->msg);

		if (err)

			break;

	}



	return err;

}



static int tdo24m_adj_mode(struct tdo24m *lcd, int mode)

{

	switch (mode) {

	case MODE_VGA:

		tdo24m_writes(lcd, lcd_vga_pass_through);

		tdo24m_writes(lcd, lcd_panel_config);

		tdo24m_writes(lcd, lcd_vga_transfer);

		break;

	case MODE_QVGA:

		tdo24m_writes(lcd, lcd_qvga_pass_through);

		tdo24m_writes(lcd, lcd_panel_config);

		tdo24m_writes(lcd, lcd_qvga_transfer);

		break;

	default:

		return -EINVAL;

	}



	lcd->mode = mode;

	return 0;

}



static int tdo24m_power_on(struct tdo24m *lcd)

{

	int err;



	err = tdo24m_writes(lcd, lcd_panel_on);

	if (err)

		goto out;



	err = tdo24m_writes(lcd, lcd_panel_reset);

	if (err)

		goto out;



	err = tdo24m_adj_mode(lcd, lcd->mode);

out:

	return err;

}



static int tdo24m_power_off(struct tdo24m *lcd)

{

	return tdo24m_writes(lcd, lcd_panel_off);

}



static int tdo24m_power(struct tdo24m *lcd, int power)

{

	int ret = 0;



	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))

		ret = tdo24m_power_on(lcd);

	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))

		ret = tdo24m_power_off(lcd);



	if (!ret)

		lcd->power = power;



	return ret;

}





static int tdo24m_set_power(struct lcd_device *ld, int power)

{

	struct tdo24m *lcd = lcd_get_data(ld);

	return tdo24m_power(lcd, power);

}



static int tdo24m_get_power(struct lcd_device *ld)

{

	struct tdo24m *lcd = lcd_get_data(ld);

	return lcd->power;

}



static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m)

{

	struct tdo24m *lcd = lcd_get_data(ld);

	int mode = MODE_QVGA;



	if (m->xres == 640 || m->xres == 480)

		mode = MODE_VGA;



	if (lcd->mode == mode)

		return 0;



	return tdo24m_adj_mode(lcd, mode);

}



static struct lcd_ops tdo24m_ops = {

	.get_power	= tdo24m_get_power,

	.set_power	= tdo24m_set_power,

	.set_mode	= tdo24m_set_mode,

};



static int __devinit tdo24m_probe(struct spi_device *spi)

{

	struct tdo24m *lcd;

	struct spi_message *m;

	struct spi_transfer *x;

	int err;



	spi->bits_per_word = 8;

	spi->mode = SPI_MODE_3;

	err = spi_setup(spi);

	if (err)

		return err;



	lcd = kzalloc(sizeof(struct tdo24m), GFP_KERNEL);

	if (!lcd)

		return -ENOMEM;



	lcd->spi_dev = spi;

	lcd->power = FB_BLANK_POWERDOWN;

	lcd->mode = MODE_VGA;	/* default to VGA */



	lcd->buf = kmalloc(TDO24M_SPI_BUFF_SIZE, sizeof(GFP_KERNEL));

	if (lcd->buf == NULL) {

		kfree(lcd);

		return -ENOMEM;

	}



	m = &lcd->msg;

	x = &lcd->xfer;



	spi_message_init(m);



	x->tx_buf = &lcd->buf[0];

	spi_message_add_tail(x, m);



	lcd->lcd_dev = lcd_device_register("tdo24m", &spi->dev,

					lcd, &tdo24m_ops);

	if (IS_ERR(lcd->lcd_dev)) {

		err = PTR_ERR(lcd->lcd_dev);

		goto out_free;

	}



	dev_set_drvdata(&spi->dev, lcd);

	err = tdo24m_power(lcd, FB_BLANK_UNBLANK);

	if (err)

		goto out_unregister;



	return 0;



out_unregister:

	lcd_device_unregister(lcd->lcd_dev);

out_free:

	kfree(lcd->buf);

	kfree(lcd);

	return err;

}



static int __devexit tdo24m_remove(struct spi_device *spi)

{

	struct tdo24m *lcd = dev_get_drvdata(&spi->dev);



	tdo24m_power(lcd, FB_BLANK_POWERDOWN);

	lcd_device_unregister(lcd->lcd_dev);

	kfree(lcd->buf);

	kfree(lcd);



	return 0;

}



#ifdef CONFIG_PM

static int tdo24m_suspend(struct spi_device *spi, pm_message_t state)

{

	struct tdo24m *lcd = dev_get_drvdata(&spi->dev);



	return tdo24m_power(lcd, FB_BLANK_POWERDOWN);

}



static int tdo24m_resume(struct spi_device *spi)

{

	struct tdo24m *lcd = dev_get_drvdata(&spi->dev);



	return tdo24m_power(lcd, FB_BLANK_UNBLANK);

}

#else

#define tdo24m_suspend	NULL

#define tdo24m_resume	NULL

#endif



/* Power down all displays on reboot, poweroff or halt */

static void tdo24m_shutdown(struct spi_device *spi)

{

	struct tdo24m *lcd = dev_get_drvdata(&spi->dev);



	tdo24m_power(lcd, FB_BLANK_POWERDOWN);

}



static struct spi_driver tdo24m_driver = {

	.driver = {

		.name		= "tdo24m",

		.owner		= THIS_MODULE,

	},

	.probe		= tdo24m_probe,

	.remove		= __devexit_p(tdo24m_remove),

	.shutdown	= tdo24m_shutdown,

	.suspend	= tdo24m_suspend,

	.resume		= tdo24m_resume,

};



static int __init tdo24m_init(void)

{

	return spi_register_driver(&tdo24m_driver);

}

module_init(tdo24m_init);



static void __exit tdo24m_exit(void)

{

	spi_unregister_driver(&tdo24m_driver);

}

module_exit(tdo24m_exit);



MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");

MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel");

MODULE_LICENSE("GPL");