linux/drivers/staging/fbtft/fb_agm1264k-fl.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * FB driver for Two KS0108 LCD controllers in AGM1264K-FL display
 *
 * Copyright (C) 2014 ololoshka2871
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/slab.h>

#include "fbtft.h"

/* Uncomment text line to use negative image on display */
/*#define NEGATIVE*/

#define WHITE …
#define BLACK …

#define DRVNAME …
#define WIDTH …
#define HEIGHT …
#define TOTALWIDTH …
#define FPS …

#define EPIN …
#define RS …
#define RW …
#define CS0 …
#define CS1 …

/* diffusing error (Floyd-Steinberg) */
#define DIFFUSING_MATRIX_WIDTH …
#define DIFFUSING_MATRIX_HEIGHT …

static const signed char
diffusing_matrix[DIFFUSING_MATRIX_WIDTH][DIFFUSING_MATRIX_HEIGHT] = …;

static const unsigned char gamma_correction_table[] = …;

static int init_display(struct fbtft_par *par)
{ … }

/* Check if all necessary GPIOS defined */
static int verify_gpios(struct fbtft_par *par)
{ … }

static unsigned long
request_gpios_match(struct fbtft_par *par, const struct fbtft_gpio *gpio)
{ … }

/* This function oses to enter commands
 * first byte - destination controller 0 or 1
 * following - commands
 */
static void write_reg8_bus8(struct fbtft_par *par, int len, ...)
{ … }

static struct
{ … } addr_win;

/* save display writing zone */
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{ … }

static void
construct_line_bitmap(struct fbtft_par *par, u8 *dest, signed short *src,
		      int xs, int xe, int y)
{ … }

static void iterate_diffusion_matrix(u32 xres, u32 yres, int x,
				     int y, signed short *convert_buf,
				     signed short pixel, signed short error)
{ … }

static int write_vmem(struct fbtft_par *par, size_t offset, size_t len)
{ … }

static int write(struct fbtft_par *par, void *buf, size_t len)
{ … }

static struct fbtft_display display = …;

FBTFT_REGISTER_DRIVER(…);

MODULE_ALIAS(…) …;

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;