Thomas Petazzoni | 7a39e96 | 2014-12-31 10:11:24 +0100 | [diff] [blame] | 1 | /* |
| 2 | * FB driver for the S6D1121 LCD Controller |
| 3 | * |
| 4 | * Copyright (C) 2013 Roman Rolinsky |
| 5 | * |
| 6 | * Based on fb_ili9325.c by Noralf Tronnes |
| 7 | * Based on ili9325.c by Jeroen Domburg |
| 8 | * Init code from UTFT library by Henning Karlsen |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/gpio.h> |
| 29 | #include <linux/delay.h> |
| 30 | |
| 31 | #include "fbtft.h" |
| 32 | |
| 33 | #define DRVNAME "fb_s6d1121" |
| 34 | #define WIDTH 240 |
| 35 | #define HEIGHT 320 |
| 36 | #define BPP 16 |
| 37 | #define FPS 20 |
| 38 | #define DEFAULT_GAMMA "26 09 24 2C 1F 23 24 25 22 26 25 23 0D 00\n" \ |
| 39 | "1C 1A 13 1D 0B 11 12 10 13 15 36 19 00 0D" |
| 40 | |
| 41 | static int init_display(struct fbtft_par *par) |
| 42 | { |
| 43 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 44 | |
| 45 | par->fbtftops.reset(par); |
| 46 | |
| 47 | if (par->gpio.cs != -1) |
| 48 | gpio_set_value(par->gpio.cs, 0); /* Activate chip */ |
| 49 | |
| 50 | /* Initialization sequence from Lib_UTFT */ |
| 51 | |
| 52 | write_reg(par, 0x0011, 0x2004); |
| 53 | write_reg(par, 0x0013, 0xCC00); |
| 54 | write_reg(par, 0x0015, 0x2600); |
| 55 | write_reg(par, 0x0014, 0x252A); |
| 56 | write_reg(par, 0x0012, 0x0033); |
| 57 | write_reg(par, 0x0013, 0xCC04); |
| 58 | write_reg(par, 0x0013, 0xCC06); |
| 59 | write_reg(par, 0x0013, 0xCC4F); |
| 60 | write_reg(par, 0x0013, 0x674F); |
| 61 | write_reg(par, 0x0011, 0x2003); |
| 62 | write_reg(par, 0x0016, 0x0007); |
| 63 | write_reg(par, 0x0002, 0x0013); |
| 64 | write_reg(par, 0x0003, 0x0003); |
| 65 | write_reg(par, 0x0001, 0x0127); |
| 66 | write_reg(par, 0x0008, 0x0303); |
| 67 | write_reg(par, 0x000A, 0x000B); |
| 68 | write_reg(par, 0x000B, 0x0003); |
| 69 | write_reg(par, 0x000C, 0x0000); |
| 70 | write_reg(par, 0x0041, 0x0000); |
| 71 | write_reg(par, 0x0050, 0x0000); |
| 72 | write_reg(par, 0x0060, 0x0005); |
| 73 | write_reg(par, 0x0070, 0x000B); |
| 74 | write_reg(par, 0x0071, 0x0000); |
| 75 | write_reg(par, 0x0078, 0x0000); |
| 76 | write_reg(par, 0x007A, 0x0000); |
| 77 | write_reg(par, 0x0079, 0x0007); |
| 78 | write_reg(par, 0x0007, 0x0051); |
| 79 | write_reg(par, 0x0007, 0x0053); |
| 80 | write_reg(par, 0x0079, 0x0000); |
| 81 | |
| 82 | write_reg(par, 0x0022); /* Write Data to GRAM */ |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| 88 | { |
| 89 | fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, |
| 90 | "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); |
| 91 | switch (par->info->var.rotate) { |
| 92 | /* R20h = Horizontal GRAM Start Address */ |
| 93 | /* R21h = Vertical GRAM Start Address */ |
| 94 | case 0: |
| 95 | write_reg(par, 0x0020, xs); |
| 96 | write_reg(par, 0x0021, ys); |
| 97 | break; |
| 98 | case 180: |
| 99 | write_reg(par, 0x0020, WIDTH - 1 - xs); |
| 100 | write_reg(par, 0x0021, HEIGHT - 1 - ys); |
| 101 | break; |
| 102 | case 270: |
| 103 | write_reg(par, 0x0020, WIDTH - 1 - ys); |
| 104 | write_reg(par, 0x0021, xs); |
| 105 | break; |
| 106 | case 90: |
| 107 | write_reg(par, 0x0020, ys); |
| 108 | write_reg(par, 0x0021, HEIGHT - 1 - xs); |
| 109 | break; |
| 110 | } |
| 111 | write_reg(par, 0x0022); /* Write Data to GRAM */ |
| 112 | } |
| 113 | |
| 114 | static int set_var(struct fbtft_par *par) |
| 115 | { |
| 116 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 117 | |
| 118 | switch (par->info->var.rotate) { |
| 119 | /* AM: GRAM update direction */ |
| 120 | case 0: |
| 121 | write_reg(par, 0x03, 0x0003 | (par->bgr << 12)); |
| 122 | break; |
| 123 | case 180: |
| 124 | write_reg(par, 0x03, 0x0000 | (par->bgr << 12)); |
| 125 | break; |
| 126 | case 270: |
| 127 | write_reg(par, 0x03, 0x000A | (par->bgr << 12)); |
| 128 | break; |
| 129 | case 90: |
| 130 | write_reg(par, 0x03, 0x0009 | (par->bgr << 12)); |
| 131 | break; |
| 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | /* |
| 138 | Gamma string format: |
| 139 | PKP0 PKP1 PKP2 PKP3 PKP4 PKP5 PKP6 PKP7 PKP8 PKP9 PKP10 PKP11 VRP0 VRP1 |
| 140 | PKN0 PKN1 PKN2 PKN3 PKN4 PKN5 PKN6 PKN7 PRN8 PRN9 PRN10 PRN11 VRN0 VRN1 |
| 141 | */ |
| 142 | #define CURVE(num, idx) curves[num*par->gamma.num_values + idx] |
| 143 | static int set_gamma(struct fbtft_par *par, unsigned long *curves) |
| 144 | { |
| 145 | unsigned long mask[] = { |
Geert Uytterhoeven | 153fe94 | 2015-03-20 16:21:58 +0100 | [diff] [blame] | 146 | 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, |
| 147 | 0x3f, 0x3f, 0x1f, 0x1f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, |
| 148 | 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x1f, 0x1f, |
| 149 | }; |
Thomas Petazzoni | 7a39e96 | 2014-12-31 10:11:24 +0100 | [diff] [blame] | 150 | int i, j; |
| 151 | |
| 152 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 153 | |
| 154 | /* apply mask */ |
| 155 | for (i = 0; i < 2; i++) |
| 156 | for (j = 0; j < 14; j++) |
| 157 | CURVE(i, j) &= mask[i*par->gamma.num_values + j]; |
| 158 | |
| 159 | write_reg(par, 0x0030, CURVE(0, 1) << 8 | CURVE(0, 0)); |
| 160 | write_reg(par, 0x0031, CURVE(0, 3) << 8 | CURVE(0, 2)); |
| 161 | write_reg(par, 0x0032, CURVE(0, 5) << 8 | CURVE(0, 3)); |
| 162 | write_reg(par, 0x0033, CURVE(0, 7) << 8 | CURVE(0, 6)); |
| 163 | write_reg(par, 0x0034, CURVE(0, 9) << 8 | CURVE(0, 8)); |
| 164 | write_reg(par, 0x0035, CURVE(0, 11) << 8 | CURVE(0, 10)); |
| 165 | |
| 166 | write_reg(par, 0x0036, CURVE(1, 1) << 8 | CURVE(1, 0)); |
| 167 | write_reg(par, 0x0037, CURVE(1, 3) << 8 | CURVE(1, 2)); |
| 168 | write_reg(par, 0x0038, CURVE(1, 5) << 8 | CURVE(1, 4)); |
| 169 | write_reg(par, 0x0039, CURVE(1, 7) << 8 | CURVE(1, 6)); |
| 170 | write_reg(par, 0x003A, CURVE(1, 9) << 8 | CURVE(1, 8)); |
| 171 | write_reg(par, 0x003B, CURVE(1, 11) << 8 | CURVE(1, 10)); |
| 172 | |
| 173 | write_reg(par, 0x003C, CURVE(0, 13) << 8 | CURVE(0, 12)); |
| 174 | write_reg(par, 0x003D, CURVE(1, 13) << 8 | CURVE(1, 12)); |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | #undef CURVE |
| 179 | |
| 180 | |
| 181 | static struct fbtft_display display = { |
| 182 | .regwidth = 16, |
| 183 | .width = WIDTH, |
| 184 | .height = HEIGHT, |
| 185 | .bpp = BPP, |
| 186 | .fps = FPS, |
| 187 | .gamma_num = 2, |
| 188 | .gamma_len = 14, |
| 189 | .gamma = DEFAULT_GAMMA, |
| 190 | .fbtftops = { |
| 191 | .init_display = init_display, |
| 192 | .set_addr_win = set_addr_win, |
| 193 | .set_var = set_var, |
| 194 | .set_gamma = set_gamma, |
| 195 | }, |
| 196 | }; |
| 197 | FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d1121", &display); |
| 198 | |
| 199 | MODULE_ALIAS("spi:" DRVNAME); |
| 200 | MODULE_ALIAS("platform:" DRVNAME); |
| 201 | MODULE_ALIAS("spi:s6d1121"); |
| 202 | MODULE_ALIAS("platform:s6d1121"); |
| 203 | |
| 204 | MODULE_DESCRIPTION("FB driver for the S6D1121 LCD Controller"); |
| 205 | MODULE_AUTHOR("Roman Rolinsky"); |
| 206 | MODULE_LICENSE("GPL"); |