LXR linux/drivers/staging/fbtft/fb

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * FB driver for the ILI9481 LCD Controller
   4 *
   5 * Copyright (c) 2014 Petr Olivka
   6 * Copyright (c) 2013 Noralf Tronnes
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/kernel.h>
  11#include <linux/init.h>
  12#include <linux/delay.h>
  13#include <video/mipi_display.h>
  14
  15#include "fbtft.h"
  16
  17#define DRVNAME "fb_ili9481"
  18#define WIDTH           320
  19#define HEIGHT          480
  20
  21static const s16 default_init_sequence[] = {
  22        /* SLP_OUT - Sleep out */
  23        -1, MIPI_DCS_EXIT_SLEEP_MODE,
  24        -2, 50,
  25        /* Power setting */
  26        -1, 0xD0, 0x07, 0x42, 0x18,
  27        /* VCOM */
  28        -1, 0xD1, 0x00, 0x07, 0x10,
  29        /* Power setting for norm. mode */
  30        -1, 0xD2, 0x01, 0x02,
  31        /* Panel driving setting */
  32        -1, 0xC0, 0x10, 0x3B, 0x00, 0x02, 0x11,
  33        /* Frame rate & inv. */
  34        -1, 0xC5, 0x03,
  35        /* Pixel format */
  36        -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
  37        /* Gamma */
  38        -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16,
  39                  0x37, 0x75, 0x77, 0x54, 0x0C, 0x00,
  40        /* DISP_ON */
  41        -1, MIPI_DCS_SET_DISPLAY_ON,
  42        -3
  43};
  44
  45static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
  46{
  47        write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
  48                  xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
  49
  50        write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
  51                  ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
  52
  53        write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
  54}
  55
  56#define HFLIP 0x01
  57#define VFLIP 0x02
  58#define ROW_X_COL 0x20
  59static int set_var(struct fbtft_par *par)
  60{
  61        switch (par->info->var.rotate) {
  62        case 270:
  63                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  64                          ROW_X_COL | HFLIP | VFLIP | (par->bgr << 3));
  65                break;
  66        case 180:
  67                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  68                          VFLIP | (par->bgr << 3));
  69                break;
  70        case 90:
  71                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  72                          ROW_X_COL | (par->bgr << 3));
  73                break;
  74        default:
  75                write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  76                          HFLIP | (par->bgr << 3));
  77                break;
  78        }
  79
  80        return 0;
  81}
  82
  83static struct fbtft_display display = {
  84        .regwidth = 8,
  85        .width = WIDTH,
  86        .height = HEIGHT,
  87        .init_sequence = default_init_sequence,
  88        .fbtftops = {
  89                .set_addr_win = set_addr_win,
  90                .set_var = set_var,
  91        },
  92};
  93
  94FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display);
  95
  96MODULE_ALIAS("spi:" DRVNAME);
  97MODULE_ALIAS("platform:" DRVNAME);
  98MODULE_ALIAS("spi:ili9481");
  99MODULE_ALIAS("platform:ili9481");
 100
 101MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller");
 102MODULE_AUTHOR("Petr Olivka");
 103MODULE_LICENSE("GPL");
 104