1 /* 2 * Custom FB driver for tinylcd.com display 3 * 4 * Copyright (C) 2013 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 #include <linux/delay.h> 25 26 #include "fbtft.h" 27 28 #define DRVNAME "fb_tinylcd" 29 #define WIDTH 320 30 #define HEIGHT 480 31 32 33 static int init_display(struct fbtft_par *par) 34 { 35 fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); 36 37 par->fbtftops.reset(par); 38 39 write_reg(par, 0xB0, 0x80); 40 write_reg(par, 0xC0, 0x0A, 0x0A); 41 write_reg(par, 0xC1, 0x45, 0x07); 42 write_reg(par, 0xC2, 0x33); 43 write_reg(par, 0xC5, 0x00, 0x42, 0x80); 44 write_reg(par, 0xB1, 0xD0, 0x11); 45 write_reg(par, 0xB4, 0x02); 46 write_reg(par, 0xB6, 0x00, 0x22, 0x3B); 47 write_reg(par, 0xB7, 0x07); 48 write_reg(par, 0x36, 0x58); 49 write_reg(par, 0xF0, 0x36, 0xA5, 0xD3); 50 write_reg(par, 0xE5, 0x80); 51 write_reg(par, 0xE5, 0x01); 52 write_reg(par, 0xB3, 0x00); 53 write_reg(par, 0xE5, 0x00); 54 write_reg(par, 0xF0, 0x36, 0xA5, 0x53); 55 write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00, 56 0x00, 0x35, 0x33, 0x00, 0x00, 0x00); 57 write_reg(par, 0x3A, 0x55); 58 write_reg(par, 0x11); 59 udelay(250); 60 write_reg(par, 0x29); 61 62 return 0; 63 } 64 65 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) 66 { 67 fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, 68 "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); 69 70 /* Column address */ 71 write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); 72 73 /* Row adress */ 74 write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); 75 76 /* Memory write */ 77 write_reg(par, 0x2C); 78 } 79 80 static int set_var(struct fbtft_par *par) 81 { 82 fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); 83 84 switch (par->info->var.rotate) { 85 case 270: 86 write_reg(par, 0xB6, 0x00, 0x02, 0x3B); 87 write_reg(par, 0x36, 0x28); 88 break; 89 case 180: 90 write_reg(par, 0xB6, 0x00, 0x22, 0x3B); 91 write_reg(par, 0x36, 0x58); 92 break; 93 case 90: 94 write_reg(par, 0xB6, 0x00, 0x22, 0x3B); 95 write_reg(par, 0x36, 0x38); 96 break; 97 default: 98 write_reg(par, 0xB6, 0x00, 0x22, 0x3B); 99 write_reg(par, 0x36, 0x08); 100 break; 101 } 102 103 return 0; 104 } 105 106 107 static struct fbtft_display display = { 108 .regwidth = 8, 109 .width = WIDTH, 110 .height = HEIGHT, 111 .fbtftops = { 112 .init_display = init_display, 113 .set_addr_win = set_addr_win, 114 .set_var = set_var, 115 }, 116 }; 117 FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display); 118 119 MODULE_ALIAS("spi:" DRVNAME); 120 MODULE_ALIAS("spi:tinylcd"); 121 122 MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display"); 123 MODULE_AUTHOR("Noralf Tronnes"); 124 MODULE_LICENSE("GPL"); 125