drivers/video/backlight/vgg2432a4.c

   1 /* drivers/video/backlight/vgg2432a4.c
   2  *
   3  * VGG2432A4 (ILI9320) LCD controller driver.
   4  *
   5  * Copyright 2007 Simtec Electronics
   6  *      http://armlinux.simtec.co.uk/
   7  *      Ben Dooks <ben@simtec.co.uk>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/delay.h>
  15 #include <linux/err.h>
  16 #include <linux/fb.h>
  17 #include <linux/init.h>
  18 #include <linux/lcd.h>
  19 #include <linux/module.h>
  20
  21 #include <linux/spi/spi.h>
  22
  23 #include <video/ili9320.h>
  24
  25 #include "ili9320.h"
  26
  27 /* Device initialisation sequences */
  28
  29 static struct ili9320_reg vgg_init1[] = {
  30         {
  31                 .address = ILI9320_POWER1,
  32                 .value   = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),
  33         }, {
  34                 .address = ILI9320_POWER2,
  35                 .value   = (ILI9320_POWER2_VC(7) |
  36                             ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),
  37         }, {
  38                 .address = ILI9320_POWER3,
  39                 .value   = ILI9320_POWER3_VRH(0),
  40         }, {
  41                 .address = ILI9320_POWER4,
  42                 .value   = ILI9320_POWER4_VREOUT(0),
  43         },
  44 };
  45
  46 static struct ili9320_reg vgg_init2[] = {
  47         {
  48                 .address = ILI9320_POWER1,
  49                 .value   = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |
  50                             ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),
  51         }, {
  52                 .address = ILI9320_POWER2,
  53                 .value   = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),
  54         }
  55 };
  56
  57 static struct ili9320_reg vgg_gamma[] = {
  58         {
  59                 .address = ILI9320_GAMMA1,
  60                 .value   = 0x0000,
  61         }, {
  62                 .address = ILI9320_GAMMA2,
  63                 .value   = 0x0505,
  64         }, {
  65                 .address = ILI9320_GAMMA3,
  66                 .value   = 0x0004,
  67         }, {
  68                 .address = ILI9320_GAMMA4,
  69                 .value   = 0x0006,
  70         }, {
  71                 .address = ILI9320_GAMMA5,
  72                 .value   = 0x0707,
  73         }, {
  74                 .address = ILI9320_GAMMA6,
  75                 .value   = 0x0105,
  76         }, {
  77                 .address = ILI9320_GAMMA7,
  78                 .value   = 0x0002,
  79         }, {
  80                 .address = ILI9320_GAMMA8,
  81                 .value   = 0x0707,
  82         }, {
  83                 .address = ILI9320_GAMMA9,
  84                 .value   = 0x0704,
  85         }, {
  86                 .address = ILI9320_GAMMA10,
  87                 .value   = 0x807,
  88         }
  89
  90 };
  91
  92 static struct ili9320_reg vgg_init0[] = {
  93         [0]     = {
  94                 /* set direction and scan mode gate */
  95                 .address = ILI9320_DRIVER,
  96                 .value   = ILI9320_DRIVER_SS,
  97         }, {
  98                 .address = ILI9320_DRIVEWAVE,
  99                 .value   = (ILI9320_DRIVEWAVE_MUSTSET |
 100                             ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
 101         }, {
 102                 .address = ILI9320_ENTRYMODE,
 103                 .value   = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,
 104         }, {
 105                 .address = ILI9320_RESIZING,
 106                 .value   = 0x0,
 107         },
 108 };
 109
 110
 111 static int vgg2432a4_lcd_init(struct ili9320 *lcd,
 112                               struct ili9320_platdata *cfg)
 113 {
 114         unsigned int addr;
 115         int ret;
 116
 117         /* Set VCore before anything else (VGG243237-6UFLWA) */
 118         ret = ili9320_write(lcd, 0x00e5, 0x8000);
 119         if (ret)
 120                 goto err_initial;
 121
 122         /* Start the oscillator up before we can do anything else. */
 123         ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
 124         if (ret)
 125                 goto err_initial;
 126
 127         /* must wait at-lesat 10ms after starting */
 128         mdelay(15);
 129
 130         ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
 131         if (ret != 0)
 132                 goto err_initial;
 133
 134         ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
 135         ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
 136         ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
 137
 138         ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
 139         ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);
 140         ili9320_write(lcd, ILI9320_RGB_IF2, ILI9320_RGBIF2_DPL);
 141
 142         ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
 143         if (ret != 0)
 144                 goto err_vgg;
 145
 146         mdelay(300);
 147
 148         ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
 149         if (ret != 0)
 150                 goto err_vgg2;
 151
 152         mdelay(100);
 153
 154         ili9320_write(lcd, ILI9320_POWER3, 0x13c);
 155
 156         mdelay(100);
 157
 158         ili9320_write(lcd, ILI9320_POWER4, 0x1c00);
 159         ili9320_write(lcd, ILI9320_POWER7, 0x000e);
 160
 161         mdelay(100);
 162
 163         ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);
 164         ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);
 165
 166         ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
 167         if (ret != 0)
 168                 goto err_vgg3;
 169
 170         ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);
 171         ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
 172         ili9320_write(lcd, ILI9320_VERT_START, 0x0);
 173         ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
 174
 175         ili9320_write(lcd, ILI9320_DRIVER2,
 176                       ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
 177
 178         ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);
 179         ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);
 180
 181         for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
 182              addr++) {
 183                 ili9320_write(lcd, addr, 0x0);
 184         }
 185
 186         ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);
 187         ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
 188         ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
 189         ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
 190         ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
 191         ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
 192
 193         lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |
 194                          ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
 195                          0x40);
 196
 197         ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
 198
 199         return 0;
 200
 201  err_vgg3:
 202  err_vgg2:
 203  err_vgg:
 204  err_initial:
 205         return ret;
 206 }
 207
 208 #ifdef CONFIG_PM
 209 static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state)
 210 {
 211         return ili9320_suspend(dev_get_drvdata(&spi->dev), state);
 212 }
 213
 214 static int vgg2432a4_resume(struct spi_device *spi)
 215 {
 216         return ili9320_resume(dev_get_drvdata(&spi->dev));
 217 }
 218 #else
 219 #define vgg2432a4_suspend       NULL
 220 #define vgg2432a4_resume        NULL
 221 #endif
 222
 223 static struct ili9320_client vgg2432a4_client = {
 224         .name   = "VGG2432A4",
 225         .init   = vgg2432a4_lcd_init,
 226 };
 227
 228 /* Device probe */
 229
 230 static int __devinit vgg2432a4_probe(struct spi_device *spi)
 231 {
 232         int ret;
 233
 234         ret = ili9320_probe_spi(spi, &vgg2432a4_client);
 235         if (ret != 0) {
 236                 dev_err(&spi->dev, "failed to initialise ili9320\n");
 237                 return ret;
 238         }
 239
 240         return 0;
 241 }
 242
 243 static int __devexit vgg2432a4_remove(struct spi_device *spi)
 244 {
 245         return ili9320_remove(dev_get_drvdata(&spi->dev));
 246 }
 247
 248 static void vgg2432a4_shutdown(struct spi_device *spi)
 249 {
 250         ili9320_shutdown(dev_get_drvdata(&spi->dev));
 251 }
 252
 253 static struct spi_driver vgg2432a4_driver = {
 254         .driver = {
 255                 .name           = "VGG2432A4",
 256                 .owner          = THIS_MODULE,
 257         },
 258         .probe          = vgg2432a4_probe,
 259         .remove         = __devexit_p(vgg2432a4_remove),
 260         .shutdown       = vgg2432a4_shutdown,
 261         .suspend        = vgg2432a4_suspend,
 262         .resume         = vgg2432a4_resume,
 263 };
 264
 265 /* Device driver initialisation */
 266
 267 static int __init vgg2432a4_init(void)
 268 {
 269         return spi_register_driver(&vgg2432a4_driver);
 270 }
 271
 272 static void __exit vgg2432a4_exit(void)
 273 {
 274         spi_unregister_driver(&vgg2432a4_driver);
 275 }
 276
 277 module_init(vgg2432a4_init);
 278 module_exit(vgg2432a4_exit);
 279
 280 MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
 281 MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
 282 MODULE_LICENSE("GPL v2");
 283
 284