linux/drivers/staging/fbtft/fb_ssd1306.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * FB driver for the SSD1306 OLED Controller
 *
 * Copyright (C) 2013 Noralf Tronnes
 */

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

#include "fbtft.h"

#define DRVNAME …
#define WIDTH …
#define HEIGHT …

/*
 * write_reg() caveat:
 *
 * This doesn't work because D/C has to be LOW for both values:
 * write_reg(par, val1, val2);
 *
 * Do it like this:
 * write_reg(par, val1);
 * write_reg(par, val2);
 */

/* Init sequence taken from the Adafruit SSD1306 Arduino library */
static int init_display(struct fbtft_par *par)
{ … }

static void set_addr_win_64x48(struct fbtft_par *par)
{ … }

static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{ … }

static int blank(struct fbtft_par *par, bool on)
{ … }

/* Gamma is used to control Contrast */
static int set_gamma(struct fbtft_par *par, u32 *curves)
{ … }

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

static struct fbtft_display display = …;

FBTFT_REGISTER_DRIVER(…);

MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;
MODULE_ALIAS(…) …;

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