211 lines
4.4 KiB
C
Executable File
211 lines
4.4 KiB
C
Executable File
/*
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* FB driver for the HX8357D LCD Controller
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* Copyright (C) 2015 Adafruit Industries
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*
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* Based on the HX8347D FB driver
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* Copyright (C) 2013 Christian Vogelgsang
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*
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* Based on driver code found here: https://github.com/watterott/r61505u-Adapter
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <video/mipi_display.h>
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#include "fbtft.h"
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#include "fb_hx8357d.h"
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#define DRVNAME "fb_hx8357d"
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#define WIDTH 320
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#define HEIGHT 480
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static int init_display(struct fbtft_par *par)
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{
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par->fbtftops.reset(par);
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/* Reset things like Gamma */
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write_reg(par, MIPI_DCS_SOFT_RESET);
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usleep_range(5000, 7000);
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/* setextc */
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write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57);
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msleep(150);
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/* setRGB which also enables SDO */
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write_reg(par, HX8357_SETRGB, 0x00, 0x00, 0x06, 0x06);
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/* -1.52V */
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write_reg(par, HX8357D_SETCOM, 0x25);
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/* Normal mode 70Hz, Idle mode 55 Hz */
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write_reg(par, HX8357_SETOSC, 0x68);
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/* Set Panel - BGR, Gate direction swapped */
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write_reg(par, HX8357_SETPANEL, 0x05);
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write_reg(par, HX8357_SETPWR1,
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0x00, /* Not deep standby */
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0x15, /* BT */
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0x1C, /* VSPR */
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0x1C, /* VSNR */
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0x83, /* AP */
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0xAA); /* FS */
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write_reg(par, HX8357D_SETSTBA,
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0x50, /* OPON normal */
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0x50, /* OPON idle */
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0x01, /* STBA */
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0x3C, /* STBA */
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0x1E, /* STBA */
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0x08); /* GEN */
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write_reg(par, HX8357D_SETCYC,
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0x02, /* NW 0x02 */
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0x40, /* RTN */
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0x00, /* DIV */
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0x2A, /* DUM */
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0x2A, /* DUM */
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0x0D, /* GDON */
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0x78); /* GDOFF */
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write_reg(par, HX8357D_SETGAMMA,
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0x02,
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0x0A,
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0x11,
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0x1d,
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0x23,
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0x35,
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0x41,
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0x4b,
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0x4b,
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0x42,
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0x3A,
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0x27,
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0x1B,
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0x08,
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0x09,
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0x03,
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0x02,
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0x0A,
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0x11,
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0x1d,
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0x23,
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0x35,
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0x41,
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0x4b,
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0x4b,
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0x42,
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0x3A,
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0x27,
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0x1B,
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0x08,
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0x09,
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0x03,
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0x00,
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0x01);
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/* 16 bit */
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write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0xC0);
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/* TE off */
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write_reg(par, MIPI_DCS_SET_TEAR_ON, 0x00);
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/* tear line */
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write_reg(par, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
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/* Exit Sleep */
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write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
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msleep(150);
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/* display on */
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write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
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usleep_range(5000, 7000);
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return 0;
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}
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static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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{
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write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
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xs >> 8, xs & 0xff, /* XSTART */
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xe >> 8, xe & 0xff); /* XEND */
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write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
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ys >> 8, ys & 0xff, /* YSTART */
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ye >> 8, ye & 0xff); /* YEND */
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write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
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}
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#define HX8357D_MADCTL_MY 0x80
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#define HX8357D_MADCTL_MX 0x40
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#define HX8357D_MADCTL_MV 0x20
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#define HX8357D_MADCTL_ML 0x10
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#define HX8357D_MADCTL_RGB 0x00
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#define HX8357D_MADCTL_BGR 0x08
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#define HX8357D_MADCTL_MH 0x04
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static int set_var(struct fbtft_par *par)
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{
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u8 val;
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switch (par->info->var.rotate) {
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case 270:
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val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
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break;
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case 180:
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val = 0;
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break;
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case 90:
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val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
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break;
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default:
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val = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
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break;
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}
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val |= (par->bgr ? HX8357D_MADCTL_RGB : HX8357D_MADCTL_BGR);
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/* Memory Access Control */
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val);
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return 0;
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}
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static struct fbtft_display display = {
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.regwidth = 8,
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.width = WIDTH,
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.height = HEIGHT,
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.gamma_num = 2,
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.gamma_len = 14,
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.fbtftops = {
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.init_display = init_display,
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.set_addr_win = set_addr_win,
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.set_var = set_var,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8357d", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("platform:" DRVNAME);
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MODULE_ALIAS("spi:hx8357d");
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MODULE_ALIAS("platform:hx8357d");
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MODULE_DESCRIPTION("FB driver for the HX8357D LCD Controller");
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MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
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MODULE_LICENSE("GPL");
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