Thomas Petazzoni | 5dc5e4f | 2014-12-31 10:11:25 +0100 | [diff] [blame] | 1 | /* |
| 2 | * FB driver for the SSD1289 LCD Controller |
| 3 | * |
| 4 | * Copyright (C) 2013 Noralf Tronnes |
| 5 | * |
| 6 | * Init sequence taken from ITDB02_Graph16.cpp - (C)2010-2011 Henning Karlsen |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/gpio.h> |
| 27 | |
| 28 | #include "fbtft.h" |
| 29 | |
| 30 | #define DRVNAME "fb_ssd1289" |
| 31 | #define WIDTH 240 |
| 32 | #define HEIGHT 320 |
| 33 | #define DEFAULT_GAMMA "02 03 2 5 7 7 4 2 4 2\n" \ |
| 34 | "02 03 2 5 7 5 4 2 4 2" |
| 35 | |
| 36 | static unsigned reg11 = 0x6040; |
| 37 | module_param(reg11, uint, 0); |
| 38 | MODULE_PARM_DESC(reg11, "Register 11h value"); |
| 39 | |
| 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 | write_reg(par, 0x00, 0x0001); |
| 51 | write_reg(par, 0x03, 0xA8A4); |
| 52 | write_reg(par, 0x0C, 0x0000); |
| 53 | write_reg(par, 0x0D, 0x080C); |
| 54 | write_reg(par, 0x0E, 0x2B00); |
| 55 | write_reg(par, 0x1E, 0x00B7); |
| 56 | write_reg(par, 0x01, |
| 57 | (1 << 13) | (par->bgr << 11) | (1 << 9) | (HEIGHT - 1)); |
| 58 | write_reg(par, 0x02, 0x0600); |
| 59 | write_reg(par, 0x10, 0x0000); |
| 60 | write_reg(par, 0x05, 0x0000); |
| 61 | write_reg(par, 0x06, 0x0000); |
| 62 | write_reg(par, 0x16, 0xEF1C); |
| 63 | write_reg(par, 0x17, 0x0003); |
| 64 | write_reg(par, 0x07, 0x0233); |
| 65 | write_reg(par, 0x0B, 0x0000); |
| 66 | write_reg(par, 0x0F, 0x0000); |
| 67 | write_reg(par, 0x41, 0x0000); |
| 68 | write_reg(par, 0x42, 0x0000); |
| 69 | write_reg(par, 0x48, 0x0000); |
| 70 | write_reg(par, 0x49, 0x013F); |
| 71 | write_reg(par, 0x4A, 0x0000); |
| 72 | write_reg(par, 0x4B, 0x0000); |
| 73 | write_reg(par, 0x44, 0xEF00); |
| 74 | write_reg(par, 0x45, 0x0000); |
| 75 | write_reg(par, 0x46, 0x013F); |
| 76 | write_reg(par, 0x23, 0x0000); |
| 77 | write_reg(par, 0x24, 0x0000); |
| 78 | write_reg(par, 0x25, 0x8000); |
| 79 | write_reg(par, 0x4f, 0x0000); |
| 80 | write_reg(par, 0x4e, 0x0000); |
| 81 | write_reg(par, 0x22); |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| 86 | { |
| 87 | fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, |
| 88 | "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); |
| 89 | |
| 90 | switch (par->info->var.rotate) { |
| 91 | /* R4Eh - Set GDDRAM X address counter */ |
| 92 | /* R4Fh - Set GDDRAM Y address counter */ |
| 93 | case 0: |
| 94 | write_reg(par, 0x4e, xs); |
| 95 | write_reg(par, 0x4f, ys); |
| 96 | break; |
| 97 | case 180: |
| 98 | write_reg(par, 0x4e, par->info->var.xres - 1 - xs); |
| 99 | write_reg(par, 0x4f, par->info->var.yres - 1 - ys); |
| 100 | break; |
| 101 | case 270: |
| 102 | write_reg(par, 0x4e, par->info->var.yres - 1 - ys); |
| 103 | write_reg(par, 0x4f, xs); |
| 104 | break; |
| 105 | case 90: |
| 106 | write_reg(par, 0x4e, ys); |
| 107 | write_reg(par, 0x4f, par->info->var.xres - 1 - xs); |
| 108 | break; |
| 109 | } |
| 110 | |
| 111 | /* R22h - RAM data write */ |
| 112 | write_reg(par, 0x22); |
| 113 | } |
| 114 | |
| 115 | static int set_var(struct fbtft_par *par) |
| 116 | { |
| 117 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 118 | |
| 119 | if (par->fbtftops.init_display != init_display) { |
| 120 | /* don't risk messing up register 11h */ |
| 121 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, |
| 122 | "%s: skipping since custom init_display() is used\n", |
| 123 | __func__); |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | switch (par->info->var.rotate) { |
| 128 | case 0: |
Geert Uytterhoeven | 153fe94 | 2015-03-20 16:21:58 +0100 | [diff] [blame] | 129 | write_reg(par, 0x11, reg11 | 0x30); |
Thomas Petazzoni | 5dc5e4f | 2014-12-31 10:11:25 +0100 | [diff] [blame] | 130 | break; |
| 131 | case 270: |
Geert Uytterhoeven | 153fe94 | 2015-03-20 16:21:58 +0100 | [diff] [blame] | 132 | write_reg(par, 0x11, reg11 | 0x28); |
Thomas Petazzoni | 5dc5e4f | 2014-12-31 10:11:25 +0100 | [diff] [blame] | 133 | break; |
| 134 | case 180: |
Geert Uytterhoeven | 153fe94 | 2015-03-20 16:21:58 +0100 | [diff] [blame] | 135 | write_reg(par, 0x11, reg11 | 0x00); |
Thomas Petazzoni | 5dc5e4f | 2014-12-31 10:11:25 +0100 | [diff] [blame] | 136 | break; |
| 137 | case 90: |
Geert Uytterhoeven | 153fe94 | 2015-03-20 16:21:58 +0100 | [diff] [blame] | 138 | write_reg(par, 0x11, reg11 | 0x18); |
Thomas Petazzoni | 5dc5e4f | 2014-12-31 10:11:25 +0100 | [diff] [blame] | 139 | break; |
| 140 | } |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | Gamma string format: |
| 147 | VRP0 VRP1 PRP0 PRP1 PKP0 PKP1 PKP2 PKP3 PKP4 PKP5 |
| 148 | VRN0 VRN1 PRN0 PRN1 PKN0 PKN1 PKN2 PKN3 PKN4 PKN5 |
| 149 | */ |
| 150 | #define CURVE(num, idx) curves[num*par->gamma.num_values + idx] |
| 151 | static int set_gamma(struct fbtft_par *par, unsigned long *curves) |
| 152 | { |
| 153 | unsigned long mask[] = { |
Geert Uytterhoeven | 153fe94 | 2015-03-20 16:21:58 +0100 | [diff] [blame] | 154 | 0x1f, 0x1f, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, |
| 155 | 0x1f, 0x1f, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, |
| 156 | }; |
Thomas Petazzoni | 5dc5e4f | 2014-12-31 10:11:25 +0100 | [diff] [blame] | 157 | int i, j; |
| 158 | |
| 159 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 160 | |
| 161 | /* apply mask */ |
| 162 | for (i = 0; i < 2; i++) |
| 163 | for (j = 0; j < 10; j++) |
| 164 | CURVE(i, j) &= mask[i*par->gamma.num_values + j]; |
| 165 | |
| 166 | write_reg(par, 0x0030, CURVE(0, 5) << 8 | CURVE(0, 4)); |
| 167 | write_reg(par, 0x0031, CURVE(0, 7) << 8 | CURVE(0, 6)); |
| 168 | write_reg(par, 0x0032, CURVE(0, 9) << 8 | CURVE(0, 8)); |
| 169 | write_reg(par, 0x0033, CURVE(0, 3) << 8 | CURVE(0, 2)); |
| 170 | write_reg(par, 0x0034, CURVE(1, 5) << 8 | CURVE(1, 4)); |
| 171 | write_reg(par, 0x0035, CURVE(1, 7) << 8 | CURVE(1, 6)); |
| 172 | write_reg(par, 0x0036, CURVE(1, 9) << 8 | CURVE(1, 8)); |
| 173 | write_reg(par, 0x0037, CURVE(1, 3) << 8 | CURVE(1, 2)); |
| 174 | write_reg(par, 0x003A, CURVE(0, 1) << 8 | CURVE(0, 0)); |
| 175 | write_reg(par, 0x003B, CURVE(1, 1) << 8 | CURVE(1, 0)); |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | #undef CURVE |
| 180 | |
| 181 | |
| 182 | static struct fbtft_display display = { |
| 183 | .regwidth = 16, |
| 184 | .width = WIDTH, |
| 185 | .height = HEIGHT, |
| 186 | .gamma_num = 2, |
| 187 | .gamma_len = 10, |
| 188 | .gamma = DEFAULT_GAMMA, |
| 189 | .fbtftops = { |
| 190 | .init_display = init_display, |
| 191 | .set_addr_win = set_addr_win, |
| 192 | .set_var = set_var, |
| 193 | .set_gamma = set_gamma, |
| 194 | }, |
| 195 | }; |
| 196 | FBTFT_REGISTER_DRIVER(DRVNAME, "solomon,ssd1289", &display); |
| 197 | |
| 198 | MODULE_ALIAS("spi:" DRVNAME); |
| 199 | MODULE_ALIAS("platform:" DRVNAME); |
| 200 | MODULE_ALIAS("spi:ssd1289"); |
| 201 | MODULE_ALIAS("platform:ssd1289"); |
| 202 | |
| 203 | MODULE_DESCRIPTION("FB driver for the SSD1289 LCD Controller"); |
| 204 | MODULE_AUTHOR("Noralf Tronnes"); |
| 205 | MODULE_LICENSE("GPL"); |