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/*
 * FB driver for Tontec Screen with R61581 LCD Controller
 *
 * Copyright (C) 2014 Noralf Tronnes
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>

#include "fbtft.h"

#define DRVNAME		"fb_r61581"
#define WIDTH		320
#define HEIGHT		480


/* this init sequence matches Tontec Screen */
static int default_init_sequence[] = {
	-1,0xB0,0x00,
	-1,0x11,
	-2,250,
	-1,0xB3,0x02,0x00,0x00,0x00,
	-1,0xC0,0x13,0x3B,0x00,0x02,0x00,0x01,0x00,0x43,
	-1,0xC1,0x08,0x16,0x08,0x08,
	-1,0xC4,0x11,0x07,0x03,0x03,
	-1,0xC6,0x00,
	-1,0xC8,0x03,0x03,0x13,0x5C,0x03,0x07,0x14,0x08,0x00,0x21,0x08,0x14,0x07,0x53,0x0C,0x13,0x03,0x03,0x21,0x00,
	-1,0x35,0x00,
	-1,0x36,0xa0,
	-1,0x3A,0x55,
	-1,0x44,0x00,0x01,
	-1,0xD0,0x07,0x07,0x1D,0x03,
	-1,0xD1,0x03,0x30,0x10,
	-1,0xD2,0x03,0x14,0x04,
	-1,0x29,
	-1,0x2C,
	-3
};

static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{
	fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
		"%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);

	/* Column address */
	write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);

	/* Row adress */
	write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);

	/* Memory write */
	write_reg(par, 0x2C);
}

static int set_var(struct fbtft_par *par)
{
	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);

	switch (par->info->var.rotate) {
	case 0:
		write_reg(par, 0x36, 0x00 | (par->bgr << 3));
		break;
	case 90:
		write_reg(par, 0x36, 0x60 | (par->bgr << 3));
		break;
	case 180:
		write_reg(par, 0x36, 0xc0 | (par->bgr << 3));
		break;
	case 270:
		write_reg(par, 0x36, 0xA0 | (par->bgr << 3));
		break;
	default:
		break;
	}
	return 0;
}


static struct fbtft_display display = {
	.regwidth = 8,
	.width = WIDTH,
	.height = HEIGHT,
	.init_sequence = default_init_sequence,
	.fbtftops = {
		.set_addr_win = set_addr_win,
		.set_var = set_var,
	},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "rense,r61581", &display);

MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:r61581");
MODULE_ALIAS("platform:r61581");

MODULE_DESCRIPTION("FB driver for the R61581 LCD Controller");
MODULE_AUTHOR("Noralf Tronnes");
MODULE_LICENSE("GPL");