1/* 2 * FB driver for the S6D02A1 LCD Controller 3 * 4 * Based on fb_st7735r.c by Noralf Tronnes 5 * Init code from UTFT library by Henning Karlsen 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22#include <linux/module.h> 23#include <linux/kernel.h> 24#include <linux/init.h> 25 26#include "fbtft.h" 27 28#define DRVNAME "fb_s6d02a1" 29 30static int default_init_sequence[] = { 31 32 -1, 0xf0, 0x5a, 0x5a, 33 34 -1, 0xfc, 0x5a, 0x5a, 35 36 -1, 0xfa, 0x02, 0x1f, 0x00, 0x10, 0x22, 0x30, 0x38, 0x3A, 0x3A, 0x3A, 0x3A, 0x3A, 0x3d, 0x02, 0x01, 37 38 -1, 0xfb, 0x21, 0x00, 0x02, 0x04, 0x07, 0x0a, 0x0b, 0x0c, 0x0c, 0x16, 0x1e, 0x30, 0x3f, 0x01, 0x02, 39 40 /* power setting sequence */ 41 -1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x01, 0x01, 0x00, 0x1f, 0x1f, 42 43 -1, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00, 44 45 -1, 0xf5, 0x00, 0x70, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6d, 0x66, 0x06, 46 47 -1, 0xf6, 0x02, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x02, 0x00, 0x06, 0x01, 0x00, 48 49 -1, 0xf2, 0x00, 0x01, 0x03, 0x08, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x04, 0x08, 0x08, 50 51 -1, 0xf8, 0x11, 52 53 -1, 0xf7, 0xc8, 0x20, 0x00, 0x00, 54 55 -1, 0xf3, 0x00, 0x00, 56 57 -1, 0x11, 58 -2, 50, 59 60 -1, 0xf3, 0x00, 0x01, 61 -2, 50, 62 -1, 0xf3, 0x00, 0x03, 63 -2, 50, 64 -1, 0xf3, 0x00, 0x07, 65 -2, 50, 66 -1, 0xf3, 0x00, 0x0f, 67 -2, 50, 68 69 -1, 0xf4, 0x00, 0x04, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00, 70 -2, 50, 71 72 -1, 0xf3, 0x00, 0x1f, 73 -2, 50, 74 -1, 0xf3, 0x00, 0x7f, 75 -2, 50, 76 77 -1, 0xf3, 0x00, 0xff, 78 -2, 50, 79 80 -1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x00, 0x01, 0x00, 0x16, 0x16, 81 82 -1, 0xf4, 0x00, 0x09, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00, 83 84 /* initializing sequence */ 85 86 -1, 0x36, 0x08, 87 88 -1, 0x35, 0x00, 89 90 -1, 0x3a, 0x05, 91 92 /* gamma setting sequence */ 93 -1, 0x26, 0x01, /* preset gamma curves, possible values 0x01, 0x02, 0x04, 0x08 */ 94 95 -2, 150, 96 -1, 0x29, 97 -1, 0x2c, 98 /* end marker */ 99 -3 100 101}; 102 103static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) 104{ 105 fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, 106 "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); 107 108 /* Column address */ 109 write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); 110 111 /* Row address */ 112 write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); 113 114 /* Memory write */ 115 write_reg(par, 0x2C); 116} 117 118#define MY (1 << 7) 119#define MX (1 << 6) 120#define MV (1 << 5) 121static int set_var(struct fbtft_par *par) 122{ 123 fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); 124 125 /* MADCTL - Memory data access control 126 RGB/BGR: 127 1. Mode selection pin SRGB 128 RGB H/W pin for color filter setting: 0=RGB, 1=BGR 129 2. MADCTL RGB bit 130 RGB-BGR ORDER color filter panel: 0=RGB, 1=BGR */ 131 switch (par->info->var.rotate) { 132 case 0: 133 write_reg(par, 0x36, MX | MY | (par->bgr << 3)); 134 break; 135 case 270: 136 write_reg(par, 0x36, MY | MV | (par->bgr << 3)); 137 break; 138 case 180: 139 write_reg(par, 0x36, par->bgr << 3); 140 break; 141 case 90: 142 write_reg(par, 0x36, MX | MV | (par->bgr << 3)); 143 break; 144 } 145 146 return 0; 147} 148 149static struct fbtft_display display = { 150 .regwidth = 8, 151 .width = 128, 152 .height = 160, 153 .init_sequence = default_init_sequence, 154 .fbtftops = { 155 .set_addr_win = set_addr_win, 156 .set_var = set_var, 157 }, 158}; 159FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d02a1", &display); 160 161MODULE_ALIAS("spi:" DRVNAME); 162MODULE_ALIAS("platform:" DRVNAME); 163MODULE_ALIAS("spi:s6d02a1"); 164MODULE_ALIAS("platform:s6d02a1"); 165 166MODULE_DESCRIPTION("FB driver for the S6D02A1 LCD Controller"); 167MODULE_AUTHOR("WOLFGANG BUENING"); 168MODULE_LICENSE("GPL"); 169