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 */ 33 static 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 62 static 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 77 static 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 } 100 101 102 static 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 }; 112 FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486", &display); 113 114 MODULE_ALIAS("spi:" DRVNAME); 115 MODULE_ALIAS("platform:" DRVNAME); 116 MODULE_ALIAS("spi:ili9486"); 117 MODULE_ALIAS("platform:ili9486"); 118 119 MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller"); 120 MODULE_AUTHOR("Noralf Tronnes"); 121 MODULE_LICENSE("GPL"); 122