LXR linux/drivers/staging/fbtft/fb

   1/*
   2 * FB driver for the ILI9481 LCD Controller
   3 *
   4 * Copyright (c) 2014 Petr Olivka
   5 * Copyright (c) 2013 Noralf Tronnes
   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 <linux/delay.h>
  22#include <video/mipi_display.h>
  23
  24#include "fbtft.h"
  25
  26#define DRVNAME "fb_ili9481"
  27#define WIDTH           320
  28#define HEIGHT          480
  29
  30static const s16 default_init_sequence[] = {
  31        /* SLP_OUT - Sleep out */
  32        -1, MIPI_DCS_EXIT_SLEEP_MODE,
  33        -2, 50,
  34        /* Power setting */
  35        -1, 0xD0, 0x07, 0x42, 0x18,
  36        /* VCOM */
  37        -1, 0xD1, 0x00, 0x07, 0x10,
  38        /* Power setting for norm. mode */
  39        -1, 0xD2, 0x01, 0x02,
  40        /* Panel driving setting */
  41        -1, 0xC0, 0x10, 0x3B, 0x00, 0x02, 0x11,
  42        /* Frame rate & inv. */
  43        -1, 0xC5, 0x03,
  44        /* Pixel format */
  45        -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
  46        /* Gamma */
  47        -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16,
  48                  0x37, 0x75, 0x77, 0x54, 0x0C, 0x00,
  49        /* DISP_ON */
  50        -1, MIPI_DCS_SET_DISPLAY_ON,
  51        -3
  52};
  53
  54static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
  55{
  56        write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
  57                  xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
  58
  59        write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
  60                  ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
  61
  62        write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
  63}
  64
  65#define HFLIP 0x01
  66#define VFLIP 0x02
  67#define ROW_X_COL 0x20
  68static int set_var(struct fbtft_par *par)
  69{
  70        switch (par->info->var.rotate) {
  71        case 270:
  72                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  73                          ROW_X_COL | HFLIP | VFLIP | (par->bgr << 3));
  74                break;
  75        case 180:
  76                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  77                          VFLIP | (par->bgr << 3));
  78                break;
  79        case 90:
  80                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  81                          ROW_X_COL | (par->bgr << 3));
  82                break;
  83        default:
  84                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  85                          HFLIP | (par->bgr << 3));
  86                break;
  87        }
  88
  89        return 0;
  90}
  91
  92static struct fbtft_display display = {
  93        .regwidth = 8,
  94        .width = WIDTH,
  95        .height = HEIGHT,
  96        .init_sequence = default_init_sequence,
  97        .fbtftops = {
  98                .set_addr_win = set_addr_win,
  99                .set_var = set_var,
 100        },
 101};
 102
 103FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display);
 104
 105MODULE_ALIAS("spi:" DRVNAME);
 106MODULE_ALIAS("platform:" DRVNAME);
 107MODULE_ALIAS("spi:ili9481");
 108MODULE_ALIAS("platform:ili9481");
 109
 110MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller");
 111MODULE_AUTHOR("Petr Olivka");
 112MODULE_LICENSE("GPL");
 113