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