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
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20
21#include "fbtft.h"
22
23#define DRVNAME		"fb_ili9486"
24#define WIDTH		320
25#define HEIGHT		480
26
27/* this init sequence matches PiScreen */
28static int default_init_sequence[] = {
29	/* Interface Mode Control */
30	-1, 0xb0, 0x0,
31	/* Sleep OUT */
32	-1, 0x11,
33	-2, 250,
34	/* Interface Pixel Format */
35	-1, 0x3A, 0x55,
36	/* Power Control 3 */
37	-1, 0xC2, 0x44,
38	/* VCOM Control 1 */
39	-1, 0xC5, 0x00, 0x00, 0x00, 0x00,
40	/* PGAMCTRL(Positive Gamma Control) */
41	-1, 0xE0, 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98,
42		  0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00,
43	/* NGAMCTRL(Negative Gamma Control) */
44	-1, 0xE1, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
45		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
46	/* Digital Gamma Control 1 */
47	-1, 0xE2, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
48		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
49	/* Sleep OUT */
50	-1, 0x11,
51	/* Display ON */
52	-1, 0x29,
53	/* end marker */
54	-3
55};
56
57static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
58{
59	/* Column address */
60	write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
61
62	/* Row address */
63	write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
64
65	/* Memory write */
66	write_reg(par, 0x2C);
67}
68
69static int set_var(struct fbtft_par *par)
70{
71	switch (par->info->var.rotate) {
72	case 0:
73		write_reg(par, 0x36, 0x80 | (par->bgr << 3));
74		break;
75	case 90:
76		write_reg(par, 0x36, 0x20 | (par->bgr << 3));
77		break;
78	case 180:
79		write_reg(par, 0x36, 0x40 | (par->bgr << 3));
80		break;
81	case 270:
82		write_reg(par, 0x36, 0xE0 | (par->bgr << 3));
83		break;
84	default:
85		break;
86	}
87
88	return 0;
89}
90
91static struct fbtft_display display = {
92	.regwidth = 8,
93	.width = WIDTH,
94	.height = HEIGHT,
95	.init_sequence = default_init_sequence,
96	.fbtftops = {
97		.set_addr_win = set_addr_win,
98		.set_var = set_var,
99	},
100};
101
102FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486", &display);
103
104MODULE_ALIAS("spi:" DRVNAME);
105MODULE_ALIAS("platform:" DRVNAME);
106MODULE_ALIAS("spi:ili9486");
107MODULE_ALIAS("platform:ili9486");
108
109MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller");
110MODULE_AUTHOR("Noralf Tronnes");
111MODULE_LICENSE("GPL");
112