271 lines
6.2 KiB
C
271 lines
6.2 KiB
C
/* drivers/video/backlight/vgg2432a4.c
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*
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* VGG2432A4 (ILI9320) LCD controller driver.
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*
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* Copyright 2007 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/lcd.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <video/ili9320.h>
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#include "ili9320.h"
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/* Device initialisation sequences */
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static struct ili9320_reg vgg_init1[] = {
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{
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.address = ILI9320_POWER1,
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.value = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),
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}, {
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.address = ILI9320_POWER2,
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.value = (ILI9320_POWER2_VC(7) |
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ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),
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}, {
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.address = ILI9320_POWER3,
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.value = ILI9320_POWER3_VRH(0),
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}, {
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.address = ILI9320_POWER4,
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.value = ILI9320_POWER4_VREOUT(0),
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},
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};
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static struct ili9320_reg vgg_init2[] = {
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{
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.address = ILI9320_POWER1,
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.value = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |
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ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),
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}, {
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.address = ILI9320_POWER2,
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.value = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),
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}
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};
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static struct ili9320_reg vgg_gamma[] = {
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{
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.address = ILI9320_GAMMA1,
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.value = 0x0000,
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}, {
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.address = ILI9320_GAMMA2,
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.value = 0x0505,
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}, {
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.address = ILI9320_GAMMA3,
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.value = 0x0004,
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}, {
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.address = ILI9320_GAMMA4,
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.value = 0x0006,
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}, {
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.address = ILI9320_GAMMA5,
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.value = 0x0707,
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}, {
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.address = ILI9320_GAMMA6,
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.value = 0x0105,
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}, {
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.address = ILI9320_GAMMA7,
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.value = 0x0002,
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}, {
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.address = ILI9320_GAMMA8,
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.value = 0x0707,
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}, {
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.address = ILI9320_GAMMA9,
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.value = 0x0704,
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}, {
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.address = ILI9320_GAMMA10,
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.value = 0x807,
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}
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};
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static struct ili9320_reg vgg_init0[] = {
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[0] = {
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/* set direction and scan mode gate */
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.address = ILI9320_DRIVER,
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.value = ILI9320_DRIVER_SS,
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}, {
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.address = ILI9320_DRIVEWAVE,
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.value = (ILI9320_DRIVEWAVE_MUSTSET |
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ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
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}, {
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.address = ILI9320_ENTRYMODE,
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.value = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,
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}, {
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.address = ILI9320_RESIZING,
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.value = 0x0,
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},
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};
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static int vgg2432a4_lcd_init(struct ili9320 *lcd,
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struct ili9320_platdata *cfg)
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{
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unsigned int addr;
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int ret;
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/* Set VCore before anything else (VGG243237-6UFLWA) */
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ret = ili9320_write(lcd, 0x00e5, 0x8000);
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if (ret)
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goto err_initial;
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/* Start the oscillator up before we can do anything else. */
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ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
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if (ret)
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goto err_initial;
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/* must wait at-lesat 10ms after starting */
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mdelay(15);
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ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
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if (ret != 0)
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goto err_initial;
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ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
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ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
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ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
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ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
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ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);
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ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2);
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ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
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if (ret != 0)
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goto err_vgg;
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mdelay(300);
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ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
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if (ret != 0)
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goto err_vgg2;
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mdelay(100);
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ili9320_write(lcd, ILI9320_POWER3, 0x13c);
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mdelay(100);
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ili9320_write(lcd, ILI9320_POWER4, 0x1c00);
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ili9320_write(lcd, ILI9320_POWER7, 0x000e);
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mdelay(100);
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ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);
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ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);
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ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
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if (ret != 0)
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goto err_vgg3;
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ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);
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ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
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ili9320_write(lcd, ILI9320_VERT_START, 0x0);
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ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
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ili9320_write(lcd, ILI9320_DRIVER2,
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ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
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ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);
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ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);
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for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
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addr++) {
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ili9320_write(lcd, addr, 0x0);
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}
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ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);
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ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
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ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
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ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
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ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
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ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
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lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |
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ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
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0x40);
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ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
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return 0;
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err_vgg3:
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err_vgg2:
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err_vgg:
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err_initial:
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return ret;
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}
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#ifdef CONFIG_PM
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static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state)
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{
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return ili9320_suspend(dev_get_drvdata(&spi->dev), state);
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}
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static int vgg2432a4_resume(struct spi_device *spi)
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{
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return ili9320_resume(dev_get_drvdata(&spi->dev));
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}
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#else
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#define vgg2432a4_suspend NULL
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#define vgg2432a4_resume NULL
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#endif
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static struct ili9320_client vgg2432a4_client = {
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.name = "VGG2432A4",
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.init = vgg2432a4_lcd_init,
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};
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/* Device probe */
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static int __devinit vgg2432a4_probe(struct spi_device *spi)
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{
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int ret;
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ret = ili9320_probe_spi(spi, &vgg2432a4_client);
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if (ret != 0) {
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dev_err(&spi->dev, "failed to initialise ili9320\n");
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return ret;
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}
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return 0;
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}
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static int __devexit vgg2432a4_remove(struct spi_device *spi)
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{
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return ili9320_remove(dev_get_drvdata(&spi->dev));
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}
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static void vgg2432a4_shutdown(struct spi_device *spi)
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{
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ili9320_shutdown(dev_get_drvdata(&spi->dev));
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}
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static struct spi_driver vgg2432a4_driver = {
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.driver = {
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.name = "VGG2432A4",
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.owner = THIS_MODULE,
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},
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.probe = vgg2432a4_probe,
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.remove = __devexit_p(vgg2432a4_remove),
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.shutdown = vgg2432a4_shutdown,
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.suspend = vgg2432a4_suspend,
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.resume = vgg2432a4_resume,
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};
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module_spi_driver(vgg2432a4_driver);
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MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
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MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("spi:VGG2432A4");
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