drivers/video/backlight/vgg2432a4.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* drivers/video/backlight/vgg2432a4.c
   3  *
   4  * VGG2432A4 (ILI9320) LCD controller driver.
   5  *
   6  * Copyright 2007 Simtec Electronics
   7  *      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
  26 static 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
  43 static 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
  54 static 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
  89 static 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
 108 static 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_SLEEP
 206 static int vgg2432a4_suspend(struct device *dev)
 207 {
 208         return ili9320_suspend(dev_get_drvdata(dev));
 209 }
 210 static int vgg2432a4_resume(struct device *dev)
 211 {
 212         return ili9320_resume(dev_get_drvdata(dev));
 213 }
 214 #endif
 215
 216 static struct ili9320_client vgg2432a4_client = {
 217         .name   = "VGG2432A4",
 218         .init   = vgg2432a4_lcd_init,
 219 };
 220
 221 /* Device probe */
 222
 223 static 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
 236 static int vgg2432a4_remove(struct spi_device *spi)
 237 {
 238         return ili9320_remove(spi_get_drvdata(spi));
 239 }
 240
 241 static void vgg2432a4_shutdown(struct spi_device *spi)
 242 {
 243         ili9320_shutdown(spi_get_drvdata(spi));
 244 }
 245
 246 static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);
 247
 248 static 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
 258 module_spi_driver(vgg2432a4_driver);
 259
 260 MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
 261 MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
 262 MODULE_LICENSE("GPL v2");
 263 MODULE_ALIAS("spi:VGG2432A4");