Permalink
Cannot retrieve contributors at this time
163 lines (129 sloc)
3.93 KB
/* | |
* FB driver for the ILI9340 LCD Controller | |
* | |
* 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/gpio.h> | |
#include <linux/delay.h> | |
#include "fbtft.h" | |
#define DRVNAME "fb_ili9340" | |
#define WIDTH 240 | |
#define HEIGHT 320 | |
/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */ | |
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, 0xEF, 0x03, 0x80, 0x02); | |
write_reg(par, 0xCF, 0x00 , 0XC1 , 0X30); | |
write_reg(par, 0xED, 0x64 , 0x03 , 0X12 , 0X81); | |
write_reg(par, 0xE8, 0x85 , 0x00 , 0x78); | |
write_reg(par, 0xCB, 0x39 , 0x2C , 0x00 , 0x34 , 0x02); | |
write_reg(par, 0xF7, 0x20); | |
write_reg(par, 0xEA, 0x00 , 0x00); | |
/* Power Control 1 */ | |
write_reg(par, 0xC0, 0x23); | |
/* Power Control 2 */ | |
write_reg(par, 0xC1, 0x10); | |
/* VCOM Control 1 */ | |
write_reg(par, 0xC5, 0x3e, 0x28); | |
/* VCOM Control 2 */ | |
write_reg(par, 0xC7, 0x86); | |
/* COLMOD: Pixel Format Set */ | |
/* 16 bits/pixel */ | |
write_reg(par, 0x3A, 0x55); | |
/* Frame Rate Control */ | |
/* Division ratio = fosc, Frame Rate = 79Hz */ | |
write_reg(par, 0xB1, 0x00, 0x18); | |
/* Display Function Control */ | |
write_reg(par, 0xB6, 0x08, 0x82, 0x27); | |
/* Gamma Function Disable */ | |
write_reg(par, 0xF2, 0x00); | |
/* Gamma curve selected */ | |
write_reg(par, 0x26, 0x01); | |
/* Positive Gamma Correction */ | |
write_reg(par, 0xE0, | |
0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, | |
0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00); | |
/* Negative Gamma Correction */ | |
write_reg(par, 0xE1, | |
0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, | |
0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F); | |
/* Sleep OUT */ | |
write_reg(par, 0x11); | |
mdelay(120); | |
/* Display ON */ | |
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); | |
} | |
#define ILI9340_MADCTL_MV 0x20 | |
#define ILI9340_MADCTL_MX 0x40 | |
#define ILI9340_MADCTL_MY 0x80 | |
static int set_var(struct fbtft_par *par) | |
{ | |
u8 val; | |
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); | |
switch (par->info->var.rotate) { | |
case 270: | |
val = ILI9340_MADCTL_MV; | |
break; | |
case 180: | |
val = ILI9340_MADCTL_MY; | |
break; | |
case 90: | |
val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX; | |
break; | |
default: | |
val = ILI9340_MADCTL_MX; | |
break; | |
} | |
/* Memory Access Control */ | |
write_reg(par, 0x36, val | (par->bgr << 3)); | |
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, "ilitek,ili9340", &display); | |
MODULE_ALIAS("spi:" DRVNAME); | |
MODULE_ALIAS("platform:" DRVNAME); | |
MODULE_ALIAS("spi:ili9340"); | |
MODULE_ALIAS("platform:ili9340"); | |
MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller"); | |
MODULE_AUTHOR("Noralf Tronnes"); | |
MODULE_LICENSE("GPL"); |