1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * FB driver for the ILI9486 LCD Controller
4 *
5 * Copyright (C) 2014 Noralf Tronnes
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <video/mipi_display.h>
12
13#include "fbtft.h"
14
15#define DRVNAME		"fb_ili9486"
16#define WIDTH		320
17#define HEIGHT		480
18
19/* this init sequence matches PiScreen */
20static const s16 default_init_sequence[] = {
21	/* Interface Mode Control */
22	-1, 0xb0, 0x0,
23	-1, MIPI_DCS_EXIT_SLEEP_MODE,
24	-2, 250,
25	/* Interface Pixel Format */
26	-1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
27	/* Power Control 3 */
28	-1, 0xC2, 0x44,
29	/* VCOM Control 1 */
30	-1, 0xC5, 0x00, 0x00, 0x00, 0x00,
31	/* PGAMCTRL(Positive Gamma Control) */
32	-1, 0xE0, 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98,
33		  0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00,
34	/* NGAMCTRL(Negative Gamma Control) */
35	-1, 0xE1, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
36		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
37	/* Digital Gamma Control 1 */
38	-1, 0xE2, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
39		  0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
40	-1, MIPI_DCS_EXIT_SLEEP_MODE,
41	-1, MIPI_DCS_SET_DISPLAY_ON,
42	/* end marker */
43	-3
44};
45
46static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
47{
48	write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
49		  xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
50
51	write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
52		  ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
53
54	write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
55}
56
57static int set_var(struct fbtft_par *par)
58{
59	switch (par->info->var.rotate) {
60	case 0:
61		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
62			  0x80 | (par->bgr << 3));
63		break;
64	case 90:
65		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
66			  0x20 | (par->bgr << 3));
67		break;
68	case 180:
69		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
70			  0x40 | (par->bgr << 3));
71		break;
72	case 270:
73		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
74			  0xE0 | (par->bgr << 3));
75		break;
76	default:
77		break;
78	}
79
80	return 0;
81}
82
83static struct fbtft_display display = {
84	.regwidth = 8,
85	.width = WIDTH,
86	.height = HEIGHT,
87	.init_sequence = default_init_sequence,
88	.fbtftops = {
89		.set_addr_win = set_addr_win,
90		.set_var = set_var,
91	},
92};
93
94FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486", &display);
95
96MODULE_ALIAS("spi:" DRVNAME);
97MODULE_ALIAS("platform:" DRVNAME);
98MODULE_ALIAS("spi:ili9486");
99MODULE_ALIAS("platform:ili9486");
100
101MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller");
102MODULE_AUTHOR("Noralf Tronnes");
103MODULE_LICENSE("GPL");
104