| /* |
| * 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"); |