LXR linux/drivers/staging/fbtft/fb

   1/*
   2 * FB driver for the S6D02A1 LCD Controller
   3 *
   4 * Based on fb_st7735r.c by Noralf Tronnes
   5 * Init code from UTFT library by Henning Karlsen
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/kernel.h>
  20#include <linux/init.h>
  21#include <video/mipi_display.h>
  22
  23#include "fbtft.h"
  24
  25#define DRVNAME "fb_s6d02a1"
  26
  27static int default_init_sequence[] = {
  28
  29        -1, 0xf0, 0x5a, 0x5a,
  30
  31        -1, 0xfc, 0x5a, 0x5a,
  32
  33        -1, 0xfa, 0x02, 0x1f, 0x00, 0x10, 0x22, 0x30, 0x38, 0x3A, 0x3A, 0x3A, 0x3A, 0x3A, 0x3d, 0x02, 0x01,
  34
  35        -1, 0xfb, 0x21, 0x00, 0x02, 0x04, 0x07, 0x0a, 0x0b, 0x0c, 0x0c, 0x16, 0x1e, 0x30, 0x3f, 0x01, 0x02,
  36
  37        /* power setting sequence */
  38        -1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x01, 0x01, 0x00, 0x1f, 0x1f,
  39
  40        -1, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
  41
  42        -1, 0xf5, 0x00, 0x70, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6d, 0x66, 0x06,
  43
  44        -1, 0xf6, 0x02, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x02, 0x00, 0x06, 0x01, 0x00,
  45
  46        -1, 0xf2, 0x00, 0x01, 0x03, 0x08, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x04, 0x08, 0x08,
  47
  48        -1, 0xf8, 0x11,
  49
  50        -1, 0xf7, 0xc8, 0x20, 0x00, 0x00,
  51
  52        -1, 0xf3, 0x00, 0x00,
  53
  54        -1, MIPI_DCS_EXIT_SLEEP_MODE,
  55        -2, 50,
  56
  57        -1, 0xf3, 0x00, 0x01,
  58        -2, 50,
  59        -1, 0xf3, 0x00, 0x03,
  60        -2, 50,
  61        -1, 0xf3, 0x00, 0x07,
  62        -2, 50,
  63        -1, 0xf3, 0x00, 0x0f,
  64        -2, 50,
  65
  66        -1, 0xf4, 0x00, 0x04, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
  67        -2, 50,
  68
  69        -1, 0xf3, 0x00, 0x1f,
  70        -2, 50,
  71        -1, 0xf3, 0x00, 0x7f,
  72        -2, 50,
  73
  74        -1, 0xf3, 0x00, 0xff,
  75        -2, 50,
  76
  77        -1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x00, 0x01, 0x00, 0x16, 0x16,
  78
  79        -1, 0xf4, 0x00, 0x09, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
  80
  81        /* initializing sequence */
  82
  83        -1, MIPI_DCS_SET_ADDRESS_MODE, 0x08,
  84
  85        -1, MIPI_DCS_SET_TEAR_ON, 0x00,
  86
  87        -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x05,
  88
  89        /* gamma setting - possible values 0x01, 0x02, 0x04, 0x08 */
  90        -1, MIPI_DCS_SET_GAMMA_CURVE, 0x01,
  91
  92        -2, 150,
  93        -1, MIPI_DCS_SET_DISPLAY_ON,
  94        -1, MIPI_DCS_WRITE_MEMORY_START,
  95        /* end marker */
  96        -3
  97
  98};
  99
 100static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
 101{
 102        write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
 103                  xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
 104
 105        write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
 106                  ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
 107
 108        write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
 109}
 110
 111#define MY BIT(7)
 112#define MX BIT(6)
 113#define MV BIT(5)
 114static int set_var(struct fbtft_par *par)
 115{
 116        /*
 117         * Memory data access control (0x36h)
 118         * RGB/BGR:
 119         *      1. Mode selection pin SRGB
 120         *              RGB H/W pin for color filter setting: 0=RGB, 1=BGR
 121         *      2. MADCTL RGB bit
 122         *              RGB-BGR ORDER color filter panel: 0=RGB, 1=BGR
 123         */
 124        switch (par->info->var.rotate) {
 125        case 0:
 126                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
 127                          MX | MY | (par->bgr << 3));
 128                break;
 129        case 270:
 130                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
 131                          MY | MV | (par->bgr << 3));
 132                break;
 133        case 180:
 134                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
 135                          par->bgr << 3);
 136                break;
 137        case 90:
 138                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
 139                          MX | MV | (par->bgr << 3));
 140                break;
 141        }
 142
 143        return 0;
 144}
 145
 146static struct fbtft_display display = {
 147        .regwidth = 8,
 148        .width = 128,
 149        .height = 160,
 150        .init_sequence = default_init_sequence,
 151        .fbtftops = {
 152                .set_addr_win = set_addr_win,
 153                .set_var = set_var,
 154        },
 155};
 156
 157FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d02a1", &display);
 158
 159MODULE_ALIAS("spi:" DRVNAME);
 160MODULE_ALIAS("platform:" DRVNAME);
 161MODULE_ALIAS("spi:s6d02a1");
 162MODULE_ALIAS("platform:s6d02a1");
 163
 164MODULE_DESCRIPTION("FB driver for the S6D02A1 LCD Controller");
 165MODULE_AUTHOR("WOLFGANG BUENING");
 166MODULE_LICENSE("GPL");
 167