[mirror_ubuntu-zesty-kernel.git] / drivers / staging / fbtft / fb_ili9340.c

/*
 * 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 address */
	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");
Commit	Line	Data
8f7fdaaf TP	1	/*
	2	* FB driver for the ILI9340 LCD Controller
	3	*
	4	* Copyright (C) 2013 Noralf Tronnes
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20
	21	#include <linux/module.h>
	22	#include <linux/kernel.h>
	23	#include <linux/init.h>
	24	#include <linux/gpio.h>
	25	#include <linux/delay.h>
	26
	27	#include "fbtft.h"
	28
	29	#define DRVNAME "fb_ili9340"
	30	#define WIDTH 240
	31	#define HEIGHT 320
	32
	33
	34	/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
	35	static int init_display(struct fbtft_par *par)
	36	{
	37	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
	38
	39	par->fbtftops.reset(par);
	40
	41	write_reg(par, 0xEF, 0x03, 0x80, 0x02);
43da0d92 AM	42	write_reg(par, 0xCF, 0x00, 0XC1, 0X30);
	43	write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81);
	44	write_reg(par, 0xE8, 0x85, 0x00, 0x78);
	45	write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02);
8f7fdaaf	46	write_reg(par, 0xF7, 0x20);
43da0d92	47	write_reg(par, 0xEA, 0x00, 0x00);
8f7fdaaf TP	48
	49	/* Power Control 1 */
	50	write_reg(par, 0xC0, 0x23);
	51
	52	/* Power Control 2 */
	53	write_reg(par, 0xC1, 0x10);
	54
	55	/* VCOM Control 1 */
	56	write_reg(par, 0xC5, 0x3e, 0x28);
	57
	58	/* VCOM Control 2 */
	59	write_reg(par, 0xC7, 0x86);
	60
	61	/* COLMOD: Pixel Format Set */
	62	/* 16 bits/pixel */
	63	write_reg(par, 0x3A, 0x55);
	64
	65	/* Frame Rate Control */
	66	/* Division ratio = fosc, Frame Rate = 79Hz */
	67	write_reg(par, 0xB1, 0x00, 0x18);
	68
	69	/* Display Function Control */
	70	write_reg(par, 0xB6, 0x08, 0x82, 0x27);
	71
	72	/* Gamma Function Disable */
	73	write_reg(par, 0xF2, 0x00);
	74
	75	/* Gamma curve selected */
	76	write_reg(par, 0x26, 0x01);
	77
	78	/* Positive Gamma Correction */
	79	write_reg(par, 0xE0,
	80	0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
	81	0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
	82
	83	/* Negative Gamma Correction */
	84	write_reg(par, 0xE1,
	85	0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
	86	0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
	87
	88	/* Sleep OUT */
	89	write_reg(par, 0x11);
	90
	91	mdelay(120);
	92
	93	/* Display ON */
	94	write_reg(par, 0x29);
	95
	96	return 0;
	97	}
	98
	99	static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
	100	{
	101	fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
	102	"%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
	103
	104	/* Column address */
	105	write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
	106
92def781	107	/* Row address */
8f7fdaaf TP	108	write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
	109
	110	/* Memory write */
	111	write_reg(par, 0x2C);
	112	}
	113
	114	#define ILI9340_MADCTL_MV 0x20
	115	#define ILI9340_MADCTL_MX 0x40
	116	#define ILI9340_MADCTL_MY 0x80
	117	static int set_var(struct fbtft_par *par)
	118	{
	119	u8 val;
	120
	121	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
	122
	123	switch (par->info->var.rotate) {
	124	case 270:
	125	val = ILI9340_MADCTL_MV;
	126	break;
	127	case 180:
	128	val = ILI9340_MADCTL_MY;
	129	break;
	130	case 90:
	131	val = ILI9340_MADCTL_MV \| ILI9340_MADCTL_MY \| ILI9340_MADCTL_MX;
	132	break;
	133	default:
	134	val = ILI9340_MADCTL_MX;
	135	break;
	136	}
	137	/* Memory Access Control */
	138	write_reg(par, 0x36, val \| (par->bgr << 3));
	139
	140	return 0;
	141	}
	142
	143
	144	static struct fbtft_display display = {
	145	.regwidth = 8,
	146	.width = WIDTH,
	147	.height = HEIGHT,
	148	.fbtftops = {
	149	.init_display = init_display,
	150	.set_addr_win = set_addr_win,
	151	.set_var = set_var,
	152	},
	153	};
	154	FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9340", &display);
	155
	156	MODULE_ALIAS("spi:" DRVNAME);
	157	MODULE_ALIAS("platform:" DRVNAME);
	158	MODULE_ALIAS("spi:ili9340");
	159	MODULE_ALIAS("platform:ili9340");
	160
	161	MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller");
	162	MODULE_AUTHOR("Noralf Tronnes");
	163	MODULE_LICENSE("GPL");