/*
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* Custom FB driver for tinylcd.com display
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*
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* Copyright (C) 2013 Noralf Tronnes
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <video/mipi_display.h>
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#include "fbtft.h"
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#define DRVNAME "fb_tinylcd"
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#define WIDTH 320
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#define HEIGHT 480
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static int init_display(struct fbtft_par *par)
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{
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par->fbtftops.reset(par);
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write_reg(par, 0xB0, 0x80);
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write_reg(par, 0xC0, 0x0A, 0x0A);
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write_reg(par, 0xC1, 0x45, 0x07);
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write_reg(par, 0xC2, 0x33);
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write_reg(par, 0xC5, 0x00, 0x42, 0x80);
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write_reg(par, 0xB1, 0xD0, 0x11);
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write_reg(par, 0xB4, 0x02);
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, 0xB7, 0x07);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x58);
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write_reg(par, 0xF0, 0x36, 0xA5, 0xD3);
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write_reg(par, 0xE5, 0x80);
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write_reg(par, 0xE5, 0x01);
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write_reg(par, 0xB3, 0x00);
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write_reg(par, 0xE5, 0x00);
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write_reg(par, 0xF0, 0x36, 0xA5, 0x53);
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write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00,
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0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
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write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
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write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
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udelay(250);
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write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
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return 0;
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}
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static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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{
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write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
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xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
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write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
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ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
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write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
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}
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static int set_var(struct fbtft_par *par)
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{
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switch (par->info->var.rotate) {
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case 270:
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write_reg(par, 0xB6, 0x00, 0x02, 0x3B);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x28);
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break;
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case 180:
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x58);
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break;
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case 90:
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x38);
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break;
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default:
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x08);
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break;
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}
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return 0;
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}
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static struct fbtft_display display = {
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.regwidth = 8,
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.width = WIDTH,
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.height = HEIGHT,
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.fbtftops = {
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.init_display = init_display,
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.set_addr_win = set_addr_win,
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.set_var = set_var,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("spi:tinylcd");
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MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display");
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MODULE_AUTHOR("Noralf Tronnes");
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MODULE_LICENSE("GPL");
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