2 * FB driver for the HX8357D LCD Controller
3 * Copyright (C) 2015 Adafruit Industries
5 * Based on the HX8347D FB driver
6 * Copyright (C) 2013 Christian Vogelgsang
8 * Based on driver code found here: https://github.com/watterott/r61505u-Adapter
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.
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.
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
27 #include "fb_hx8357d.h"
29 #define DRVNAME "fb_hx8357d"
33 static int init_display(struct fbtft_par *par)
35 par->fbtftops.reset(par);
37 /* Reset things like Gamma */
38 write_reg(par, HX8357B_SWRESET);
39 usleep_range(5000, 7000);
42 write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57);
45 /* setRGB which also enables SDO */
46 write_reg(par, HX8357_SETRGB, 0x00, 0x00, 0x06, 0x06);
49 write_reg(par, HX8357D_SETCOM, 0x25);
51 /* Normal mode 70Hz, Idle mode 55 Hz */
52 write_reg(par, HX8357_SETOSC, 0x68);
54 /* Set Panel - BGR, Gate direction swapped */
55 write_reg(par, HX8357_SETPANEL, 0x05);
57 write_reg(par, HX8357_SETPWR1,
58 0x00, /* Not deep standby */
65 write_reg(par, HX8357D_SETSTBA,
66 0x50, /* OPON normal */
73 write_reg(par, HX8357D_SETCYC,
82 write_reg(par, HX8357D_SETGAMMA,
119 write_reg(par, HX8357_COLMOD, 0x55);
121 write_reg(par, HX8357_MADCTL, 0xC0);
124 write_reg(par, HX8357_TEON, 0x00);
127 write_reg(par, HX8357_TEARLINE, 0x00, 0x02);
130 write_reg(par, HX8357_SLPOUT);
134 write_reg(par, HX8357_DISPON);
135 usleep_range(5000, 7000);
140 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
142 /* Column addr set */
143 write_reg(par, HX8357_CASET,
144 xs >> 8, xs & 0xff, /* XSTART */
145 xe >> 8, xe & 0xff); /* XEND */
148 write_reg(par, HX8357_PASET,
149 ys >> 8, ys & 0xff, /* YSTART */
150 ye >> 8, ye & 0xff); /* YEND */
153 write_reg(par, HX8357_RAMWR);
156 #define HX8357D_MADCTL_MY 0x80
157 #define HX8357D_MADCTL_MX 0x40
158 #define HX8357D_MADCTL_MV 0x20
159 #define HX8357D_MADCTL_ML 0x10
160 #define HX8357D_MADCTL_RGB 0x00
161 #define HX8357D_MADCTL_BGR 0x08
162 #define HX8357D_MADCTL_MH 0x04
163 static int set_var(struct fbtft_par *par)
167 switch (par->info->var.rotate) {
169 val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
175 val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
178 val = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
182 val |= (par->bgr ? HX8357D_MADCTL_RGB : HX8357D_MADCTL_BGR);
184 /* Memory Access Control */
185 write_reg(par, HX8357_MADCTL, val);
190 static struct fbtft_display display = {
197 .init_display = init_display,
198 .set_addr_win = set_addr_win,
203 FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8357d", &display);
205 MODULE_ALIAS("spi:" DRVNAME);
206 MODULE_ALIAS("platform:" DRVNAME);
207 MODULE_ALIAS("spi:hx8357d");
208 MODULE_ALIAS("platform:hx8357d");
210 MODULE_DESCRIPTION("FB driver for the HX8357D LCD Controller");
211 MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
212 MODULE_LICENSE("GPL");