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 */ |
20 | static 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 | |
46 | static 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 | |
57 | static 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 | |
83 | static 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 | |
94 | FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486" , &display); |
95 | |
96 | MODULE_ALIAS("spi:" DRVNAME); |
97 | MODULE_ALIAS("platform:" DRVNAME); |
98 | MODULE_ALIAS("spi:ili9486" ); |
99 | MODULE_ALIAS("platform:ili9486" ); |
100 | |
101 | MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller" ); |
102 | MODULE_AUTHOR("Noralf Tronnes" ); |
103 | MODULE_LICENSE("GPL" ); |
104 | |