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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 | /* * FB driver for the HX8357D LCD Controller * Copyright (C) 2015 Adafruit Industries * * Based on the HX8347D FB driver * Copyright (C) 2013 Christian Vogelgsang * * Based on driver code found here: https://github.com/watterott/r61505u-Adapter * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include "fbtft.h" #include "fb_hx8357d.h" #define DRVNAME "fb_hx8357d" #define WIDTH 320 #define HEIGHT 480 static int init_display(struct fbtft_par *par) { par->fbtftops.reset(par); /* Reset things like Gamma */ write_reg(par, HX8357B_SWRESET); usleep_range(5000, 7000); /* setextc */ write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57); msleep(150); /* setRGB which also enables SDO */ write_reg(par, HX8357_SETRGB, 0x00, 0x00, 0x06, 0x06); /* -1.52V */ write_reg(par, HX8357D_SETCOM, 0x25); /* Normal mode 70Hz, Idle mode 55 Hz */ write_reg(par, HX8357_SETOSC, 0x68); /* Set Panel - BGR, Gate direction swapped */ write_reg(par, HX8357_SETPANEL, 0x05); write_reg(par, HX8357_SETPWR1, 0x00, /* Not deep standby */ 0x15, /* BT */ 0x1C, /* VSPR */ 0x1C, /* VSNR */ 0x83, /* AP */ 0xAA); /* FS */ write_reg(par, HX8357D_SETSTBA, 0x50, /* OPON normal */ 0x50, /* OPON idle */ 0x01, /* STBA */ 0x3C, /* STBA */ 0x1E, /* STBA */ 0x08); /* GEN */ write_reg(par, HX8357D_SETCYC, 0x02, /* NW 0x02 */ 0x40, /* RTN */ 0x00, /* DIV */ 0x2A, /* DUM */ 0x2A, /* DUM */ 0x0D, /* GDON */ 0x78); /* GDOFF */ write_reg(par, HX8357D_SETGAMMA, 0x02, 0x0A, 0x11, 0x1d, 0x23, 0x35, 0x41, 0x4b, 0x4b, 0x42, 0x3A, 0x27, 0x1B, 0x08, 0x09, 0x03, 0x02, 0x0A, 0x11, 0x1d, 0x23, 0x35, 0x41, 0x4b, 0x4b, 0x42, 0x3A, 0x27, 0x1B, 0x08, 0x09, 0x03, 0x00, 0x01); /* 16 bit */ write_reg(par, HX8357_COLMOD, 0x55); write_reg(par, HX8357_MADCTL, 0xC0); /* TE off */ write_reg(par, HX8357_TEON, 0x00); /* tear line */ write_reg(par, HX8357_TEARLINE, 0x00, 0x02); /* Exit Sleep */ write_reg(par, HX8357_SLPOUT); msleep(150); /* display on */ write_reg(par, HX8357_DISPON); usleep_range(5000, 7000); return 0; } static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) { /* Column addr set */ write_reg(par, HX8357_CASET, xs >> 8, xs & 0xff, /* XSTART */ xe >> 8, xe & 0xff); /* XEND */ /* Row addr set */ write_reg(par, HX8357_PASET, ys >> 8, ys & 0xff, /* YSTART */ ye >> 8, ye & 0xff); /* YEND */ /* write to RAM */ write_reg(par, HX8357_RAMWR); } #define HX8357D_MADCTL_MY 0x80 #define HX8357D_MADCTL_MX 0x40 #define HX8357D_MADCTL_MV 0x20 #define HX8357D_MADCTL_ML 0x10 #define HX8357D_MADCTL_RGB 0x00 #define HX8357D_MADCTL_BGR 0x08 #define HX8357D_MADCTL_MH 0x04 static int set_var(struct fbtft_par *par) { u8 val; switch (par->info->var.rotate) { case 270: val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX; break; case 180: val = 0; break; case 90: val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY; break; default: val = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY; break; } val |= (par->bgr ? HX8357D_MADCTL_RGB : HX8357D_MADCTL_BGR); /* Memory Access Control */ write_reg(par, HX8357_MADCTL, val); return 0; } static struct fbtft_display display = { .regwidth = 8, .width = WIDTH, .height = HEIGHT, .gamma_num = 2, .gamma_len = 14, .fbtftops = { .init_display = init_display, .set_addr_win = set_addr_win, .set_var = set_var, }, }; FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8357d", &display); MODULE_ALIAS("spi:" DRVNAME); MODULE_ALIAS("platform:" DRVNAME); MODULE_ALIAS("spi:hx8357d"); MODULE_ALIAS("platform:hx8357d"); MODULE_DESCRIPTION("FB driver for the HX8357D LCD Controller"); MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>"); MODULE_LICENSE("GPL"); |