linux/drivers/input/touchscreen/hampshire.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Hampshire serial touchscreen driver
 *
 * Copyright (c) 2010 Adam Bennett
 * Based on the dynapro driver (c) Tias Guns
 */


/*
 * 2010/04/08 Adam Bennett <[email protected]>
 *   Copied dynapro.c and edited for Hampshire 4-byte protocol
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>

#define DRIVER_DESC …

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

/*
 * Definitions & global arrays.
 */

#define HAMPSHIRE_FORMAT_TOUCH_BIT …
#define HAMPSHIRE_FORMAT_LENGTH …
#define HAMPSHIRE_RESPONSE_BEGIN_BYTE …

#define HAMPSHIRE_MIN_XC …
#define HAMPSHIRE_MAX_XC …
#define HAMPSHIRE_MIN_YC …
#define HAMPSHIRE_MAX_YC …

#define HAMPSHIRE_GET_XC(data) …
#define HAMPSHIRE_GET_YC(data) …
#define HAMPSHIRE_GET_TOUCHED(data) …

/*
 * Per-touchscreen data.
 */

struct hampshire { … };

static void hampshire_process_data(struct hampshire *phampshire)
{ … }

static irqreturn_t hampshire_interrupt(struct serio *serio,
		unsigned char data, unsigned int flags)
{ … }

static void hampshire_disconnect(struct serio *serio)
{ … }

/*
 * hampshire_connect() is the routine that is called when someone adds a
 * new serio device that supports hampshire protocol and registers it as
 * an input device. This is usually accomplished using inputattach.
 */

static int hampshire_connect(struct serio *serio, struct serio_driver *drv)
{ … }

/*
 * The serio driver structure.
 */

static const struct serio_device_id hampshire_serio_ids[] = …;

MODULE_DEVICE_TABLE(serio, hampshire_serio_ids);

static struct serio_driver hampshire_drv = …;

module_serio_driver(…) …;