/
fb_tinylcd.c
124 lines (105 loc) · 3.17 KB
/
fb_tinylcd.c
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/*
* Custom FB driver for tinylcd.com display
*
* Copyright (C) 2013 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 <linux/delay.h>
#include "fbtft.h"
#define DRVNAME "fb_tinylcd"
#define WIDTH 320
#define HEIGHT 480
static int init_display(struct fbtft_par *par)
{
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
par->fbtftops.reset(par);
write_reg(par, 0xB0, 0x80);
write_reg(par, 0xC0, 0x0A, 0x0A);
write_reg(par, 0xC1, 0x45, 0x07);
write_reg(par, 0xC2, 0x33);
write_reg(par, 0xC5, 0x00, 0x42, 0x80);
write_reg(par, 0xB1, 0xD0, 0x11);
write_reg(par, 0xB4, 0x02);
write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
write_reg(par, 0xB7, 0x07);
write_reg(par, 0x36, 0x58);
write_reg(par, 0xF0, 0x36, 0xA5, 0xD3);
write_reg(par, 0xE5, 0x80);
write_reg(par, 0xE5, 0x01);
write_reg(par, 0xB3, 0x00);
write_reg(par, 0xE5, 0x00);
write_reg(par, 0xF0, 0x36, 0xA5, 0x53);
write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00,
0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
write_reg(par, 0x3A, 0x55);
write_reg(par, 0x11);
udelay(250);
write_reg(par, 0x29);
return 0;
}
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 270:
write_reg(par, 0xB6, 0x00, 0x02, 0x3B);
write_reg(par, 0x36, 0x28);
break;
case 180:
write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
write_reg(par, 0x36, 0x58);
break;
case 90:
write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
write_reg(par, 0x36, 0x38);
break;
default:
write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
write_reg(par, 0x36, 0x08);
break;
}
return 0;
}
static struct fbtft_display display = {
.regwidth = 8,
.width = WIDTH,
.height = HEIGHT,
.fbtftops = {
.init_display = init_display,
.set_addr_win = set_addr_win,
.set_var = set_var,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("spi:tinylcd");
MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display");
MODULE_AUTHOR("Noralf Tronnes");
MODULE_LICENSE("GPL");