1/*
2 * FB driver for the ILI9486 LCD Controller
3 *
4 * Copyright (C) 2014 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
25#include "fbtft.h"
26
27#define DRVNAME		"fb_ili9486"
28#define WIDTH		320
29#define HEIGHT		480
30
31
32/* this init sequence matches PiScreen */
33static int default_init_sequence[] = {
34	/* Interface Mode Control */
35	-1, 0xb0, 0x0,
36	/* Sleep OUT */
37	-1, 0x11,
38	-2, 250,
39	/* Interface Pixel Format */
40	-1, 0x3A, 0x55,
41	/* Power Control 3 */
42	-1, 0xC2, 0x44,
43	/* VCOM Control 1 */
44	-1, 0xC5, 0x00, 0x00, 0x00, 0x00,
45	/* PGAMCTRL(Positive Gamma Control) */
46	-1, 0xE0, 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98,
47		  0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00,
48	/* NGAMCTRL(Negative Gamma Control) */
49	-1, 0xE1, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
50		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
51	/* Digital Gamma Control 1 */
52	-1, 0xE2, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
53		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
54	/* Sleep OUT */
55	-1, 0x11,
56	/* Display ON */
57	-1, 0x29,
58	/* end marker */
59	-3
60};
61
62static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
63{
64	fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
65		"%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
66
67	/* Column address */
68	write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
69
70	/* Row address */
71	write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
72
73	/* Memory write */
74	write_reg(par, 0x2C);
75}
76
77static int set_var(struct fbtft_par *par)
78{
79	fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
80
81	switch (par->info->var.rotate) {
82	case 0:
83		write_reg(par, 0x36, 0x80 | (par->bgr << 3));
84		break;
85	case 90:
86		write_reg(par, 0x36, 0x20 | (par->bgr << 3));
87		break;
88	case 180:
89		write_reg(par, 0x36, 0x40 | (par->bgr << 3));
90		break;
91	case 270:
92		write_reg(par, 0x36, 0xE0 | (par->bgr << 3));
93		break;
94	default:
95		break;
96	}
97
98	return 0;
99}
100
101
102static struct fbtft_display display = {
103	.regwidth = 8,
104	.width = WIDTH,
105	.height = HEIGHT,
106	.init_sequence = default_init_sequence,
107	.fbtftops = {
108		.set_addr_win = set_addr_win,
109		.set_var = set_var,
110	},
111};
112FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486", &display);
113
114MODULE_ALIAS("spi:" DRVNAME);
115MODULE_ALIAS("platform:" DRVNAME);
116MODULE_ALIAS("spi:ili9486");
117MODULE_ALIAS("platform:ili9486");
118
119MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller");
120MODULE_AUTHOR("Noralf Tronnes");
121MODULE_LICENSE("GPL");
122