Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | // SPDX-License-Identifier: GPL-2.0+ /* * FB driver for the S6D1121 LCD Controller * * Copyright (C) 2013 Roman Rolinsky * * Based on fb_ili9325.c by Noralf Tronnes * Based on ili9325.c by Jeroen Domburg * Init code from UTFT library by Henning Karlsen */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include "fbtft.h" #define DRVNAME "fb_s6d1121" #define WIDTH 240 #define HEIGHT 320 #define BPP 16 #define FPS 20 #define DEFAULT_GAMMA "26 09 24 2C 1F 23 24 25 22 26 25 23 0D 00\n" \ "1C 1A 13 1D 0B 11 12 10 13 15 36 19 00 0D" static int init_display(struct fbtft_par *par) { par->fbtftops.reset(par); /* Initialization sequence from Lib_UTFT */ write_reg(par, 0x0011, 0x2004); write_reg(par, 0x0013, 0xCC00); write_reg(par, 0x0015, 0x2600); write_reg(par, 0x0014, 0x252A); write_reg(par, 0x0012, 0x0033); write_reg(par, 0x0013, 0xCC04); write_reg(par, 0x0013, 0xCC06); write_reg(par, 0x0013, 0xCC4F); write_reg(par, 0x0013, 0x674F); write_reg(par, 0x0011, 0x2003); write_reg(par, 0x0016, 0x0007); write_reg(par, 0x0002, 0x0013); write_reg(par, 0x0003, 0x0003); write_reg(par, 0x0001, 0x0127); write_reg(par, 0x0008, 0x0303); write_reg(par, 0x000A, 0x000B); write_reg(par, 0x000B, 0x0003); write_reg(par, 0x000C, 0x0000); write_reg(par, 0x0041, 0x0000); write_reg(par, 0x0050, 0x0000); write_reg(par, 0x0060, 0x0005); write_reg(par, 0x0070, 0x000B); write_reg(par, 0x0071, 0x0000); write_reg(par, 0x0078, 0x0000); write_reg(par, 0x007A, 0x0000); write_reg(par, 0x0079, 0x0007); write_reg(par, 0x0007, 0x0051); write_reg(par, 0x0007, 0x0053); write_reg(par, 0x0079, 0x0000); write_reg(par, 0x0022); /* Write Data to GRAM */ return 0; } static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) { switch (par->info->var.rotate) { /* R20h = Horizontal GRAM Start Address */ /* R21h = Vertical GRAM Start Address */ case 0: write_reg(par, 0x0020, xs); write_reg(par, 0x0021, ys); break; case 180: write_reg(par, 0x0020, WIDTH - 1 - xs); write_reg(par, 0x0021, HEIGHT - 1 - ys); break; case 270: write_reg(par, 0x0020, WIDTH - 1 - ys); write_reg(par, 0x0021, xs); break; case 90: write_reg(par, 0x0020, ys); write_reg(par, 0x0021, HEIGHT - 1 - xs); break; } write_reg(par, 0x0022); /* Write Data to GRAM */ } static int set_var(struct fbtft_par *par) { switch (par->info->var.rotate) { /* AM: GRAM update direction */ case 0: write_reg(par, 0x03, 0x0003 | (par->bgr << 12)); break; case 180: write_reg(par, 0x03, 0x0000 | (par->bgr << 12)); break; case 270: write_reg(par, 0x03, 0x000A | (par->bgr << 12)); break; case 90: write_reg(par, 0x03, 0x0009 | (par->bgr << 12)); break; } return 0; } /* * Gamma string format: * PKP0 PKP1 PKP2 PKP3 PKP4 PKP5 PKP6 PKP7 PKP8 PKP9 PKP10 PKP11 VRP0 VRP1 * PKN0 PKN1 PKN2 PKN3 PKN4 PKN5 PKN6 PKN7 PRN8 PRN9 PRN10 PRN11 VRN0 VRN1 */ #define CURVE(num, idx) curves[(num) * par->gamma.num_values + (idx)] static int set_gamma(struct fbtft_par *par, u32 *curves) { static const unsigned long mask[] = { 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x1f, 0x1f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x1f, 0x1f, }; int i, j; /* apply mask */ for (i = 0; i < 2; i++) for (j = 0; j < 14; j++) CURVE(i, j) &= mask[i * par->gamma.num_values + j]; write_reg(par, 0x0030, CURVE(0, 1) << 8 | CURVE(0, 0)); write_reg(par, 0x0031, CURVE(0, 3) << 8 | CURVE(0, 2)); write_reg(par, 0x0032, CURVE(0, 5) << 8 | CURVE(0, 3)); write_reg(par, 0x0033, CURVE(0, 7) << 8 | CURVE(0, 6)); write_reg(par, 0x0034, CURVE(0, 9) << 8 | CURVE(0, 8)); write_reg(par, 0x0035, CURVE(0, 11) << 8 | CURVE(0, 10)); write_reg(par, 0x0036, CURVE(1, 1) << 8 | CURVE(1, 0)); write_reg(par, 0x0037, CURVE(1, 3) << 8 | CURVE(1, 2)); write_reg(par, 0x0038, CURVE(1, 5) << 8 | CURVE(1, 4)); write_reg(par, 0x0039, CURVE(1, 7) << 8 | CURVE(1, 6)); write_reg(par, 0x003A, CURVE(1, 9) << 8 | CURVE(1, 8)); write_reg(par, 0x003B, CURVE(1, 11) << 8 | CURVE(1, 10)); write_reg(par, 0x003C, CURVE(0, 13) << 8 | CURVE(0, 12)); write_reg(par, 0x003D, CURVE(1, 13) << 8 | CURVE(1, 12)); return 0; } #undef CURVE static struct fbtft_display display = { .regwidth = 16, .width = WIDTH, .height = HEIGHT, .bpp = BPP, .fps = FPS, .gamma_num = 2, .gamma_len = 14, .gamma = DEFAULT_GAMMA, .fbtftops = { .init_display = init_display, .set_addr_win = set_addr_win, .set_var = set_var, .set_gamma = set_gamma, }, }; FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d1121", &display); MODULE_ALIAS("spi:" DRVNAME); MODULE_ALIAS("platform:" DRVNAME); MODULE_ALIAS("spi:s6d1121"); MODULE_ALIAS("platform:s6d1121"); MODULE_DESCRIPTION("FB driver for the S6D1121 LCD Controller"); MODULE_AUTHOR("Roman Rolinsky"); MODULE_LICENSE("GPL"); |