/* 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, cfg->rgb_if2); 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");