fb: add support for the ILI9320 video display controller

Provide support for the ILI9320 display controller chip which is found in
many LCD displays.  Included with this is support for an example LCD using
this chip, the VGG2432A4.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/backlight/Kconfig

@@ -36,6 +36,23 @@ config LCD_LTV350QV
 
 	  The LTV350QV panel is present on all ATSTK1000 boards.
 
+config LCD_ILI9320
+	tristate
+	depends on LCD_CLASS_DEVICE && BACKLIGHT_LCD_SUPPORT
+	default n
+	help
+	  If you have a panel based on the ILI9320 controller chip
+	  then say y to include a power driver for it.
+
+config LCD_VGG2432A4
+	tristate "VGG2432A4 LCM device support"
+	depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER
+	select LCD_ILI9320
+	default n
+	help
+	  If you have a VGG2432A4 panel based on the ILI9320 controller chip
+	  then say y to include a power driver for it.
+
 #
 # Backlight
 #

drivers/video/backlight/Makefile

 # Backlight & LCD drivers
 
 obj-$(CONFIG_LCD_CLASS_DEVICE)     += lcd.o
-obj-$(CONFIG_LCD_LTV350QV)	+= ltv350qv.o
+obj-$(CONFIG_LCD_LTV350QV)	   += ltv350qv.o
+obj-$(CONFIG_LCD_ILI9320)	   += ili9320.o
+obj-$(CONFIG_LCD_VGG2432A4)	   += vgg2432a4.o
 
 obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
 obj-$(CONFIG_BACKLIGHT_CORGI)	+= corgi_bl.o

drivers/video/backlight/ili9320.c

+/* drivers/video/backlight/ili9320.c
+ *
+ * ILI9320 LCD controller driver core.
+ *
+ * Copyright 2007 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/lcd.h>
+#include <linux/module.h>
+
+#include <linux/spi/spi.h>
+
+#include <video/ili9320.h>
+
+#include "ili9320.h"
+
+
+static inline int ili9320_write_spi(struct ili9320 *ili,
+				    unsigned int reg,
+				    unsigned int value)
+{
+	struct ili9320_spi *spi = &ili->access.spi;
+	unsigned char *addr = spi->buffer_addr;
+	unsigned char *data = spi->buffer_data;
+
+	/* spi message consits of:
+	 * first byte: ID and operation
+	 */
+
+	addr[0] = spi->id | ILI9320_SPI_INDEX | ILI9320_SPI_WRITE;
+	addr[1] = reg >> 8;
+	addr[2] = reg;
+
+	/* second message is the data to transfer */
+
+	data[0] = spi->id | ILI9320_SPI_DATA  | ILI9320_SPI_WRITE;
+ 	data[1] = value >> 8;
+	data[2] = value;
+
+	return spi_sync(spi->dev, &spi->message);
+}
+
+int ili9320_write(struct ili9320 *ili, unsigned int reg, unsigned int value)
+{
+	dev_dbg(ili->dev, "write: reg=%02x, val=%04x\n", reg, value);
+	return ili->write(ili, reg, value);
+}
+
+EXPORT_SYMBOL_GPL(ili9320_write);
+
+int ili9320_write_regs(struct ili9320 *ili,
+		       struct ili9320_reg *values,
+		       int nr_values)
+{
+	int index;
+	int ret;
+
+	for (index = 0; index < nr_values; index++, values++) {
+		ret = ili9320_write(ili, values->address, values->value);
+		if (ret != 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(ili9320_write_regs);
+
+static void ili9320_reset(struct ili9320 *lcd)
+{
+	struct ili9320_platdata *cfg = lcd->platdata;
+
+	cfg->reset(1);
+	mdelay(50);
+
+	cfg->reset(0);
+	mdelay(50);
+
+	cfg->reset(1);
+	mdelay(100);
+}
+
+static inline int ili9320_init_chip(struct ili9320 *lcd)
+{
+	int ret;
+
+	ili9320_reset(lcd);
+
+	ret = lcd->client->init(lcd, lcd->platdata);
+	if (ret != 0) {
+		dev_err(lcd->dev, "failed to initialise display\n");
+		return ret;
+	}
+
+	lcd->initialised = 1;
+	return 0;
+}
+
+static inline int ili9320_power_on(struct ili9320 *lcd)
+{
+	if (!lcd->initialised)
+		ili9320_init_chip(lcd);
+
+	lcd->display1 |= (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_BASEE);
+	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
+
+	return 0;
+}
+
+static inline int ili9320_power_off(struct ili9320 *lcd)
+{
+	lcd->display1 &= ~(ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_BASEE);
+	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
+
+	return 0;
+}
+
+#define POWER_IS_ON(pwr)	((pwr) <= FB_BLANK_NORMAL)
+
+static int ili9320_power(struct ili9320 *lcd, int power)
+{
+	int ret = 0;
+
+	dev_dbg(lcd->dev, "power %d => %d\n", lcd->power, power);
+
+	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
+		ret = ili9320_power_on(lcd);
+	else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
+		ret = ili9320_power_off(lcd);
+
+	if (ret == 0)
+		lcd->power = power;
+	else
+		dev_warn(lcd->dev, "failed to set power mode %d\n", power);
+
+	return ret;
+}
+
+static inline struct ili9320 *to_our_lcd(struct lcd_device *lcd)
+{
+	return lcd_get_data(lcd);
+}
+
+static int ili9320_set_power(struct lcd_device *ld, int power)
+{
+	struct ili9320 *lcd = to_our_lcd(ld);
+
+	return ili9320_power(lcd, power);
+}
+
+static int ili9320_get_power(struct lcd_device *ld)
+{
+	struct ili9320 *lcd = to_our_lcd(ld);
+
+	return lcd->power;
+}
+
+static struct lcd_ops ili9320_ops = {
+	.get_power	= ili9320_get_power,
+	.set_power	= ili9320_set_power,
+};
+
+static void __devinit ili9320_setup_spi(struct ili9320 *ili,
+					struct spi_device *dev)
+{
+	struct ili9320_spi *spi = &ili->access.spi;
+
+	ili->write = ili9320_write_spi;
+	spi->dev = dev;
+
+	/* fill the two messages we are going to use to send the data
+	 * with, the first the address followed by the data. The datasheet
+	 * says they should be done as two distinct cycles of the SPI CS line.
+	 */
+
+	spi->xfer[0].tx_buf = spi->buffer_addr;
+	spi->xfer[1].tx_buf = spi->buffer_data;
+	spi->xfer[0].len = 3;
+	spi->xfer[1].len = 3;
+	spi->xfer[0].bits_per_word = 8;
+	spi->xfer[1].bits_per_word = 8;
+	spi->xfer[0].cs_change = 1;
+
+	spi_message_init(&spi->message);
+	spi_message_add_tail(&spi->xfer[0], &spi->message);
+	spi_message_add_tail(&spi->xfer[1], &spi->message);
+}
+
+int __devinit ili9320_probe_spi(struct spi_device *spi,
+				struct ili9320_client *client)
+{
+	struct ili9320_platdata *cfg = spi->dev.platform_data;
+	struct device *dev = &spi->dev;
+	struct ili9320 *ili;
+	struct lcd_device *lcd;
+	int ret = 0;
+
+	/* verify we where given some information */
+
+	if (cfg == NULL) {
+		dev_err(dev, "no platform data supplied\n");
+		return -EINVAL;
+	}
+
+	if (cfg->hsize <= 0 || cfg->vsize <= 0 || cfg->reset == NULL) {
+		dev_err(dev, "invalid platform data supplied\n");
+		return -EINVAL;
+	}
+
+	/* allocate and initialse our state */
+
+	ili = kzalloc(sizeof(struct ili9320), GFP_KERNEL);
+	if (ili == NULL) {
+		dev_err(dev, "no memory for device\n");
+		return -ENOMEM;
+	}
+
+	ili->access.spi.id = ILI9320_SPI_IDCODE | ILI9320_SPI_ID(1);
+
+	ili->dev = dev;
+	ili->client = client;
+	ili->power = FB_BLANK_POWERDOWN;
+	ili->platdata = cfg;
+
+	dev_set_drvdata(&spi->dev, ili);
+
+	ili9320_setup_spi(ili, spi);
+
+	lcd = lcd_device_register("ili9320", dev, ili, &ili9320_ops);
+	if (IS_ERR(lcd)) {
+		dev_err(dev, "failed to register lcd device\n");
+		ret = PTR_ERR(lcd);
+		goto err_free;
+	}
+
+	ili->lcd = lcd;
+
+	dev_info(dev, "initialising %s\n", client->name);
+
+	ret = ili9320_power(ili, FB_BLANK_UNBLANK);
+	if (ret != 0) {
+		dev_err(dev, "failed to set lcd power state\n");
+		goto err_unregister;
+	}
+
+	return 0;
+
+ err_unregister:
+	lcd_device_unregister(lcd);
+
+ err_free:
+	kfree(ili);
+
+	return ret;
+}
+
+EXPORT_SYMBOL_GPL(ili9320_probe_spi);
+
+int __devexit ili9320_remove(struct ili9320 *ili)
+{
+	ili9320_power(ili, FB_BLANK_POWERDOWN);
+
+	lcd_device_unregister(ili->lcd);
+	kfree(ili);
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(ili9320_remove);
+
+#ifdef CONFIG_PM
+int ili9320_suspend(struct ili9320 *lcd, pm_message_t state)
+{
+	int ret;
+
+	dev_dbg(lcd->dev, "%s: event %d\n", __func__, state.event);
+
+	if (state.event == PM_EVENT_SUSPEND) {
+		ret = ili9320_power(lcd, FB_BLANK_POWERDOWN);
+
+		if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
+			ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |
+				      ILI9320_POWER1_SLP |
+				      ILI9320_POWER1_DSTB);
+			lcd->initialised = 0;
+		}
+
+		return ret;
+	}
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(ili9320_suspend);
+
+int ili9320_resume(struct ili9320 *lcd)
+{
+	dev_info(lcd->dev, "resuming from power state %d\n", lcd->power);
+
+	if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
+		ili9320_write(lcd, ILI9320_POWER1, 0x00);
+	}
+
+	return ili9320_power(lcd, FB_BLANK_UNBLANK);
+}
+
+EXPORT_SYMBOL_GPL(ili9320_resume);
+#endif
+
+/* Power down all displays on reboot, poweroff or halt */
+void ili9320_shutdown(struct ili9320 *lcd)
+{
+	ili9320_power(lcd, FB_BLANK_POWERDOWN);
+}
+
+EXPORT_SYMBOL_GPL(ili9320_shutdown);
+
+MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
+MODULE_DESCRIPTION("ILI9320 LCD Driver");
+MODULE_LICENSE("GPL v2");

drivers/video/backlight/ili9320.h

+/* drivers/video/backlight/ili9320.h
+ *
+ * ILI9320 LCD controller driver core.
+ *
+ * Copyright 2007 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://armlinux.simtec.co.uk/
+ *
+ * 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
+ * published by the Free Software Foundation.
+*/
+
+/* Holder for register and value pairs. */
+struct ili9320_reg {
+	unsigned short		address;
+	unsigned short		value;
+};
+
+struct ili9320;
+
+struct ili9320_client {
+	const char	*name;
+	int	(*init)(struct ili9320 *ili, struct ili9320_platdata *cfg);
+
+};
+/* Device attached via an SPI bus. */
+struct  ili9320_spi {
+	struct spi_device	*dev;
+	struct spi_message	message;
+	struct spi_transfer	xfer[2];
+
+	unsigned char		id;
+	unsigned char		buffer_addr[4];
+	unsigned char		buffer_data[4];
+};
+
+/* ILI9320 device state. */
+struct ili9320 {
+	union {
+		struct ili9320_spi	spi;	/* SPI attachged device. */
+	} access;				/* Register access method. */
+
+	struct device			*dev;
+	struct lcd_device		*lcd;	/* LCD device we created. */
+	struct ili9320_client		*client;
+	struct ili9320_platdata		*platdata;
+
+	int				 power; /* current power state. */
+	int				 initialised;
+
+	unsigned short			 display1;
+	unsigned short			 power1;
+
+	int (*write)(struct ili9320 *ili, unsigned int reg, unsigned int val);
+};
+
+
+/* ILI9320 register access routines */
+
+extern int ili9320_write(struct ili9320 *ili,
+			 unsigned int reg, unsigned int value);
+
+extern int ili9320_write_regs(struct ili9320 *ili,
+			      struct ili9320_reg *values,
+			      int nr_values);
+
+/* Device probe */
+
+extern int ili9320_probe_spi(struct spi_device *spi,
+			     struct ili9320_client *cli);
+
+extern int ili9320_remove(struct ili9320 *lcd);
+extern void ili9320_shutdown(struct ili9320 *lcd);
+
+/* PM */
+
+extern int ili9320_suspend(struct ili9320 *lcd, pm_message_t state);
+extern int ili9320_resume(struct ili9320 *lcd);

drivers/video/backlight/vgg2432a4.c

+/* drivers/video/backlight/vgg2432a4.c
+ *
+ * VGG2432A4 (ILI9320) LCD controller driver.
+ *
+ * Copyright 2007 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/lcd.h>
+#include <linux/module.h>
+
+#include <linux/spi/spi.h>
+
+#include <video/ili9320.h>
+
+#include "ili9320.h"
+
+/* Device initialisation sequences */
+
+static struct ili9320_reg vgg_init1[] = {
+	{
+		.address = ILI9320_POWER1,
+		.value	 = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),
+	}, {
+		.address = ILI9320_POWER2,
+		.value	 = (ILI9320_POWER2_VC(7) |
+			    ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),
+	}, {
+		.address = ILI9320_POWER3,
+		.value	 = ILI9320_POWER3_VRH(0),
+	}, {
+		.address = ILI9320_POWER4,
+		.value	 = ILI9320_POWER4_VREOUT(0),
+	},
+};
+
+static struct ili9320_reg vgg_init2[] = {
+	{
+		.address = ILI9320_POWER1,
+		.value   = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |
+			    ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),
+	}, {
+		.address = ILI9320_POWER2,
+		.value   = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),
+	}
+};
+
+static struct ili9320_reg vgg_gamma[] = {
+	{
+		.address = ILI9320_GAMMA1,
+		.value	 = 0x0000,
+	}, {
+		.address = ILI9320_GAMMA2,
+		.value   = 0x0505,
+	}, {
+		.address = ILI9320_GAMMA3,
+		.value	 = 0x0004,
+	}, {
+		.address = ILI9320_GAMMA4,
+		.value	 = 0x0006,
+	}, {
+		.address = ILI9320_GAMMA5,
+		.value	 = 0x0707,
+	}, {
+		.address = ILI9320_GAMMA6,
+		.value	 = 0x0105,
+	}, {
+		.address = ILI9320_GAMMA7,
+		.value	 = 0x0002,
+	}, {
+		.address = ILI9320_GAMMA8,
+		.value	 = 0x0707,
+	}, {
+		.address = ILI9320_GAMMA9,
+		.value	 = 0x0704,
+	}, {
+		.address = ILI9320_GAMMA10,
+		.value	 = 0x807,
+	}
+
+};
+
+static struct ili9320_reg vgg_init0[] = {
+	[0]	= {
+		/* set direction and scan mode gate */
+		.address = ILI9320_DRIVER,
+		.value	 = ILI9320_DRIVER_SS,
+	}, {
+		.address = ILI9320_DRIVEWAVE,
+		.value	 = (ILI9320_DRIVEWAVE_MUSTSET |
+			    ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
+	}, {
+		.address = ILI9320_ENTRYMODE,
+		.value	 = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,
+	}, {
+		.address = ILI9320_RESIZING,
+		.value	 = 0x0,
+	},
+};
+
+
+static int vgg2432a4_lcd_init(struct ili9320 *lcd,
+			      struct ili9320_platdata *cfg)
+{
+	unsigned int addr;
+	int ret;
+
+	/* Set VCore before anything else (VGG243237-6UFLWA) */
+	ret = ili9320_write(lcd, 0x00e5, 0x8000);
+	if (ret)
+		goto err_initial;
+
+	/* Start the oscillator up before we can do anything else. */
+	ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
+	if (ret)
+		goto err_initial;
+
+	/* must wait at-lesat 10ms after starting */
+	mdelay(15);
+
+	ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
+	if (ret != 0)
+		goto err_initial;
+
+	ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
+	ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
+	ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
+
+	ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
+	ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);
+	ili9320_write(lcd, ILI9320_RGB_IF2, ILI9320_RGBIF2_DPL);
+
+	ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
+	if (ret != 0)
+		goto err_vgg;
+
+	mdelay(300);
+
+	ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
+	if (ret != 0)
+		goto err_vgg2;
+
+	mdelay(100);
+
+	ili9320_write(lcd, ILI9320_POWER3, 0x13c);
+
+	mdelay(100);
+
+	ili9320_write(lcd, ILI9320_POWER4, 0x1c00);
+	ili9320_write(lcd, ILI9320_POWER7, 0x000e);
+
+	mdelay(100);
+
+	ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);
+	ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);
+
+	ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
+	if (ret != 0)
+		goto err_vgg3;
+
+	ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);
+	ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
+	ili9320_write(lcd, ILI9320_VERT_START, 0x0);
+	ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
+
+	ili9320_write(lcd, ILI9320_DRIVER2,
+		      ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
+
+	ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);
+	ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);
+
+	for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
+	     addr++) {
+		ili9320_write(lcd, addr, 0x0);
+	}
+
+	ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);
+	ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
+	ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
+	ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
+	ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
+	ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
+
+	lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |
+			 ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
+			 0x40);
+
+	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
+
+	return 0;
+
+ err_vgg3:
+ err_vgg2:
+ err_vgg:
+ err_initial:
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state)
+{
+	return ili9320_suspend(dev_get_drvdata(&spi->dev), state);
+}
+
+static int vgg2432a4_resume(struct spi_device *spi)
+{
+	return ili9320_resume(dev_get_drvdata(&spi->dev));
+}
+#else
+#define vgg2432a4_suspend	NULL
+#define vgg2432a4_resume 	NULL
+#endif
+
+static struct ili9320_client vgg2432a4_client = {
+	.name	= "VGG2432A4",
+	.init	= vgg2432a4_lcd_init,
+};
+
+/* Device probe */
+
+static int __devinit vgg2432a4_probe(struct spi_device *spi)
+{
+	int ret;
+
+	ret = ili9320_probe_spi(spi, &vgg2432a4_client);
+	if (ret != 0) {
+		dev_err(&spi->dev, "failed to initialise ili9320\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int __devexit vgg2432a4_remove(struct spi_device *spi)
+{
+	return ili9320_remove(dev_get_drvdata(&spi->dev));
+}
+
+static void vgg2432a4_shutdown(struct spi_device *spi)
+{
+	ili9320_shutdown(dev_get_drvdata(&spi->dev));
+}
+
+static struct spi_driver vgg2432a4_driver = {
+	.driver = {
+		.name		= "VGG2432A4",
+		.owner		= THIS_MODULE,
+	},
+	.probe		= vgg2432a4_probe,
+	.remove		= __devexit_p(vgg2432a4_remove),
+	.shutdown	= vgg2432a4_shutdown,
+	.suspend	= vgg2432a4_suspend,
+	.resume		= vgg2432a4_resume,
+};
+
+/* Device driver initialisation */
+
+static int __init vgg2432a4_init(void)
+{
+	return spi_register_driver(&vgg2432a4_driver);
+}
+
+static void __exit vgg2432a4_exit(void)
+{
+	spi_unregister_driver(&vgg2432a4_driver);
+}
+
+module_init(vgg2432a4_init);
+module_exit(vgg2432a4_exit);
+
+MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
+MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
+MODULE_LICENSE("GPL v2");
+
+

include/video/ili9320.h

+/* include/video/ili9320.c
+ *
+ * ILI9320 LCD controller configuration control.
+ *
+ * Copyright 2007 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://armlinux.simtec.co.uk/
+ *
+ * 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
+ * published by the Free Software Foundation.
+*/
+
+#define ILI9320_REG(x)	(x)
+
+#define ILI9320_INDEX			ILI9320_REG(0x00)
+
+#define ILI9320_OSCILATION		ILI9320_REG(0x00)
+#define ILI9320_DRIVER			ILI9320_REG(0x01)
+#define ILI9320_DRIVEWAVE		ILI9320_REG(0x02)
+#define ILI9320_ENTRYMODE		ILI9320_REG(0x03)
+#define ILI9320_RESIZING		ILI9320_REG(0x04)
+#define ILI9320_DISPLAY1		ILI9320_REG(0x07)
+#define ILI9320_DISPLAY2		ILI9320_REG(0x08)
+#define ILI9320_DISPLAY3		ILI9320_REG(0x09)
+#define ILI9320_DISPLAY4		ILI9320_REG(0x0A)
+#define ILI9320_RGB_IF1			ILI9320_REG(0x0C)
+#define ILI9320_FRAMEMAKER		ILI9320_REG(0x0D)
+#define ILI9320_RGB_IF2			ILI9320_REG(0x0F)
+
+#define ILI9320_POWER1			ILI9320_REG(0x10)
+#define ILI9320_POWER2			ILI9320_REG(0x11)
+#define ILI9320_POWER3			ILI9320_REG(0x12)
+#define ILI9320_POWER4			ILI9320_REG(0x13)
+#define ILI9320_GRAM_HORIZ_ADDR		ILI9320_REG(0x20)
+#define ILI9320_GRAM_VERT_ADD		ILI9320_REG(0x21)
+#define ILI9320_POWER7			ILI9320_REG(0x29)
+#define ILI9320_FRAME_RATE_COLOUR	ILI9320_REG(0x2B)
+
+#define ILI9320_GAMMA1			ILI9320_REG(0x30)
+#define ILI9320_GAMMA2			ILI9320_REG(0x31)
+#define ILI9320_GAMMA3			ILI9320_REG(0x32)
+#define ILI9320_GAMMA4			ILI9320_REG(0x35)
+#define ILI9320_GAMMA5			ILI9320_REG(0x36)
+#define ILI9320_GAMMA6			ILI9320_REG(0x37)
+#define ILI9320_GAMMA7			ILI9320_REG(0x38)
+#define ILI9320_GAMMA8			ILI9320_REG(0x39)
+#define ILI9320_GAMMA9			ILI9320_REG(0x3C)
+#define ILI9320_GAMMA10			ILI9320_REG(0x3D)
+
+#define ILI9320_HORIZ_START		ILI9320_REG(0x50)
+#define ILI9320_HORIZ_END		ILI9320_REG(0x51)
+#define ILI9320_VERT_START		ILI9320_REG(0x52)
+#define ILI9320_VERT_END		ILI9320_REG(0x53)
+
+#define ILI9320_DRIVER2			ILI9320_REG(0x60)
+#define ILI9320_BASE_IMAGE		ILI9320_REG(0x61)
+#define ILI9320_VERT_SCROLL		ILI9320_REG(0x6a)
+
+#define ILI9320_PARTIAL1_POSITION	ILI9320_REG(0x80)
+#define ILI9320_PARTIAL1_START		ILI9320_REG(0x81)
+#define ILI9320_PARTIAL1_END		ILI9320_REG(0x82)
+#define ILI9320_PARTIAL2_POSITION	ILI9320_REG(0x83)
+#define ILI9320_PARTIAL2_START		ILI9320_REG(0x84)
+#define ILI9320_PARTIAL2_END		ILI9320_REG(0x85)
+
+#define ILI9320_INTERFACE1		ILI9320_REG(0x90)
+#define ILI9320_INTERFACE2		ILI9320_REG(0x92)
+#define ILI9320_INTERFACE3		ILI9320_REG(0x93)
+#define ILI9320_INTERFACE4		ILI9320_REG(0x95)
+#define ILI9320_INTERFACE5		ILI9320_REG(0x97)
+#define ILI9320_INTERFACE6		ILI9320_REG(0x98)
+
+/* Register contents definitions. */
+
+#define ILI9320_OSCILATION_OSC		(1 << 0)
+
+#define ILI9320_DRIVER_SS		(1 << 8)
+#define ILI9320_DRIVER_SM		(1 << 10)
+
+#define ILI9320_DRIVEWAVE_EOR		(1 << 8)
+#define ILI9320_DRIVEWAVE_BC		(1 << 9)
+#define ILI9320_DRIVEWAVE_MUSTSET	(1 << 10)
+
+#define ILI9320_ENTRYMODE_AM		(1 << 3)
+#define ILI9320_ENTRYMODE_ID(x)		((x) << 4)
+#define ILI9320_ENTRYMODE_ORG		(1 << 7)
+#define ILI9320_ENTRYMODE_HWM		(1 << 8)
+#define ILI9320_ENTRYMODE_BGR		(1 << 12)
+#define ILI9320_ENTRYMODE_DFM		(1 << 14)
+#define ILI9320_ENTRYMODE_TRI		(1 << 15)
+
+
+#define ILI9320_RESIZING_RSZ(x)		((x) << 0)
+#define ILI9320_RESIZING_RCH(x)		((x) << 4)
+#define ILI9320_RESIZING_RCV(x)		((x) << 8)
+
+
+#define ILI9320_DISPLAY1_D(x)		((x) << 0)
+#define ILI9320_DISPLAY1_CL		(1 << 3)
+#define ILI9320_DISPLAY1_DTE		(1 << 4)
+#define ILI9320_DISPLAY1_GON		(1 << 5)
+#define ILI9320_DISPLAY1_BASEE		(1 << 8)
+#define ILI9320_DISPLAY1_PTDE(x)	((x) << 12)
+
+
+#define ILI9320_DISPLAY2_BP(x)		((x) << 0)
+#define ILI9320_DISPLAY2_FP(x)		((x) << 8)
+
+
+#define ILI9320_RGBIF1_RIM_RGB18	(0 << 0)
+#define ILI9320_RGBIF1_RIM_RGB16	(1 << 0)
+#define ILI9320_RGBIF1_RIM_RGB6		(2 << 0)
+
+#define ILI9320_RGBIF1_CLK_INT		(0 << 4)
+#define ILI9320_RGBIF1_CLK_RGBIF	(1 << 4)
+#define ILI9320_RGBIF1_CLK_VSYNC	(2 << 4)
+
+#define ILI9320_RGBIF1_RM		(1 << 8)
+
+#define ILI9320_RGBIF1_ENC_FRAMES(x)	(((x) - 1)<< 13)
+
+#define ILI9320_RGBIF2_DPL		(1 << 0)
+#define ILI9320_RGBIF2_EPL		(1 << 1)
+#define ILI9320_RGBIF2_HSPL		(1 << 3)
+#define ILI9320_RGBIF2_VSPL		(1 << 4)
+
+
+#define ILI9320_POWER1_SLP		(1 << 1)
+#define ILI9320_POWER1_DSTB		(1 << 2)
+#define ILI9320_POWER1_AP(x)		((x) << 4)
+#define ILI9320_POWER1_APE		(1 << 7)
+#define ILI9320_POWER1_BT(x)		((x) << 8)
+#define ILI9320_POWER1_SAP		(1 << 12)
+
+
+#define ILI9320_POWER2_VC(x)		((x) << 0)
+#define ILI9320_POWER2_DC0(x)		((x) << 4)
+#define ILI9320_POWER2_DC1(x)		((x) << 8)
+
+
+#define ILI9320_POWER3_VRH(x)		((x) << 0)
+#define ILI9320_POWER3_PON		(1 << 4)
+#define ILI9320_POWER3_VCMR		(1 << 8)
+
+
+#define ILI9320_POWER4_VREOUT(x)	((x) << 8)
+
+
+#define ILI9320_DRIVER2_SCNL(x)		((x) << 0)
+#define ILI9320_DRIVER2_NL(x)		((x) << 8)
+#define ILI9320_DRIVER2_GS		(1 << 15)
+
+
+#define ILI9320_BASEIMAGE_REV		(1 << 0)
+#define ILI9320_BASEIMAGE_VLE		(1 << 1)
+#define ILI9320_BASEIMAGE_NDL		(1 << 2)
+
+
+#define ILI9320_INTERFACE4_RTNE(x)	(x)
+#define ILI9320_INTERFACE4_DIVE(x)	((x) << 8)
+
+/* SPI interface definitions */
+
+#define ILI9320_SPI_IDCODE		(0x70)
+#define ILI9320_SPI_ID(x)		((x) << 2)
+#define ILI9320_SPI_READ		(0x01)
+#define ILI9320_SPI_WRITE		(0x00)
+#define ILI9320_SPI_DATA		(0x02)
+#define ILI9320_SPI_INDEX		(0x00)
+
+/* platform data to pass configuration from lcd */
+
+enum ili9320_suspend {
+	ILI9320_SUSPEND_OFF,
+	ILI9320_SUSPEND_DEEP,
+};
+
+struct ili9320_platdata {
+	unsigned short	hsize;
+	unsigned short	vsize;
+
+	enum ili9320_suspend suspend;
+
+	/* set the reset line, 0 = reset asserted, 1 = normal */
+	void		(*reset)(unsigned int val);
+
+	unsigned short	entry_mode;
+	unsigned short	display2;
+	unsigned short	display3;
+	unsigned short	display4;
+	unsigned short	rgb_if1;
+	unsigned short	rgb_if2;
+	unsigned short	interface2;
+	unsigned short	interface3;
+	unsigned short	interface4;
+	unsigned short	interface5;
+	unsigned short	interface6;
+};
+