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1// SPDX-License-Identifier: GPL-2.0-only2/* drivers/video/backlight/vgg2432a4.c3 *4 * VGG2432A4 (ILI9320) LCD controller driver.5 *6 * Copyright 2007 Simtec Electronics7 * http://armlinux.simtec.co.uk/8 * Ben Dooks <ben@simtec.co.uk>9*/10 11#include <linux/delay.h>12#include <linux/err.h>13#include <linux/fb.h>14#include <linux/init.h>15#include <linux/lcd.h>16#include <linux/module.h>17 18#include <linux/spi/spi.h>19 20#include <video/ili9320.h>21 22#include "ili9320.h"23 24/* Device initialisation sequences */25 26static const struct ili9320_reg vgg_init1[] = {27 {28 .address = ILI9320_POWER1,29 .value = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),30 }, {31 .address = ILI9320_POWER2,32 .value = (ILI9320_POWER2_VC(7) |33 ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),34 }, {35 .address = ILI9320_POWER3,36 .value = ILI9320_POWER3_VRH(0),37 }, {38 .address = ILI9320_POWER4,39 .value = ILI9320_POWER4_VREOUT(0),40 },41};42 43static const struct ili9320_reg vgg_init2[] = {44 {45 .address = ILI9320_POWER1,46 .value = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |47 ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),48 }, {49 .address = ILI9320_POWER2,50 .value = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),51 }52};53 54static const struct ili9320_reg vgg_gamma[] = {55 {56 .address = ILI9320_GAMMA1,57 .value = 0x0000,58 }, {59 .address = ILI9320_GAMMA2,60 .value = 0x0505,61 }, {62 .address = ILI9320_GAMMA3,63 .value = 0x0004,64 }, {65 .address = ILI9320_GAMMA4,66 .value = 0x0006,67 }, {68 .address = ILI9320_GAMMA5,69 .value = 0x0707,70 }, {71 .address = ILI9320_GAMMA6,72 .value = 0x0105,73 }, {74 .address = ILI9320_GAMMA7,75 .value = 0x0002,76 }, {77 .address = ILI9320_GAMMA8,78 .value = 0x0707,79 }, {80 .address = ILI9320_GAMMA9,81 .value = 0x0704,82 }, {83 .address = ILI9320_GAMMA10,84 .value = 0x807,85 }86 87};88 89static const struct ili9320_reg vgg_init0[] = {90 [0] = {91 /* set direction and scan mode gate */92 .address = ILI9320_DRIVER,93 .value = ILI9320_DRIVER_SS,94 }, {95 .address = ILI9320_DRIVEWAVE,96 .value = (ILI9320_DRIVEWAVE_MUSTSET |97 ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),98 }, {99 .address = ILI9320_ENTRYMODE,100 .value = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,101 }, {102 .address = ILI9320_RESIZING,103 .value = 0x0,104 },105};106 107 108static int vgg2432a4_lcd_init(struct ili9320 *lcd,109 struct ili9320_platdata *cfg)110{111 unsigned int addr;112 int ret;113 114 /* Set VCore before anything else (VGG243237-6UFLWA) */115 ret = ili9320_write(lcd, 0x00e5, 0x8000);116 if (ret)117 goto err_initial;118 119 /* Start the oscillator up before we can do anything else. */120 ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);121 if (ret)122 goto err_initial;123 124 /* must wait at-lesat 10ms after starting */125 mdelay(15);126 127 ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));128 if (ret != 0)129 goto err_initial;130 131 ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);132 ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);133 ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);134 135 ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);136 ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);137 ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2);138 139 ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));140 if (ret != 0)141 goto err_vgg;142 143 mdelay(300);144 145 ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));146 if (ret != 0)147 goto err_vgg2;148 149 mdelay(100);150 151 ili9320_write(lcd, ILI9320_POWER3, 0x13c);152 153 mdelay(100);154 155 ili9320_write(lcd, ILI9320_POWER4, 0x1c00);156 ili9320_write(lcd, ILI9320_POWER7, 0x000e);157 158 mdelay(100);159 160 ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);161 ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);162 163 ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));164 if (ret != 0)165 goto err_vgg3;166 167 ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);168 ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);169 ili9320_write(lcd, ILI9320_VERT_START, 0x0);170 ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);171 172 ili9320_write(lcd, ILI9320_DRIVER2,173 ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));174 175 ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);176 ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);177 178 for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;179 addr++) {180 ili9320_write(lcd, addr, 0x0);181 }182 183 ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);184 ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);185 ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);186 ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);187 ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);188 ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);189 190 lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |191 ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |192 0x40);193 194 ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);195 196 return 0;197 198 err_vgg3:199 err_vgg2:200 err_vgg:201 err_initial:202 return ret;203}204 205#ifdef CONFIG_PM_SLEEP206static int vgg2432a4_suspend(struct device *dev)207{208 return ili9320_suspend(dev_get_drvdata(dev));209}210static int vgg2432a4_resume(struct device *dev)211{212 return ili9320_resume(dev_get_drvdata(dev));213}214#endif215 216static struct ili9320_client vgg2432a4_client = {217 .name = "VGG2432A4",218 .init = vgg2432a4_lcd_init,219};220 221/* Device probe */222 223static int vgg2432a4_probe(struct spi_device *spi)224{225 int ret;226 227 ret = ili9320_probe_spi(spi, &vgg2432a4_client);228 if (ret != 0) {229 dev_err(&spi->dev, "failed to initialise ili9320\n");230 return ret;231 }232 233 return 0;234}235 236static void vgg2432a4_remove(struct spi_device *spi)237{238 ili9320_remove(spi_get_drvdata(spi));239}240 241static void vgg2432a4_shutdown(struct spi_device *spi)242{243 ili9320_shutdown(spi_get_drvdata(spi));244}245 246static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);247 248static struct spi_driver vgg2432a4_driver = {249 .driver = {250 .name = "VGG2432A4",251 .pm = &vgg2432a4_pm_ops,252 },253 .probe = vgg2432a4_probe,254 .remove = vgg2432a4_remove,255 .shutdown = vgg2432a4_shutdown,256};257 258module_spi_driver(vgg2432a4_driver);259 260MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");261MODULE_DESCRIPTION("VGG2432A4 LCD Driver");262MODULE_LICENSE("GPL v2");263MODULE_ALIAS("spi:VGG2432A4");264