linux/drivers/input/touchscreen/mtouch.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * MicroTouch (3M) serial touchscreen driver
 *
 * Copyright (c) 2004 Vojtech Pavlik
 */


/*
 * 2005/02/19 Dan Streetman <[email protected]>
 *   Copied elo.c and edited for MicroTouch 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 MTOUCH_FORMAT_TABLET_STATUS_BIT …
#define MTOUCH_FORMAT_TABLET_TOUCH_BIT …
#define MTOUCH_FORMAT_TABLET_LENGTH …
#define MTOUCH_RESPONSE_BEGIN_BYTE …
#define MTOUCH_RESPONSE_END_BYTE …

/* todo: check specs for max length of all responses */
#define MTOUCH_MAX_LENGTH …

#define MTOUCH_MIN_XC …
#define MTOUCH_MAX_XC …
#define MTOUCH_MIN_YC …
#define MTOUCH_MAX_YC …

#define MTOUCH_GET_XC(data) …
#define MTOUCH_GET_YC(data) …
#define MTOUCH_GET_TOUCHED(data) …

/*
 * Per-touchscreen data.
 */

struct mtouch { … };

static void mtouch_process_format_tablet(struct mtouch *mtouch)
{ … }

static void mtouch_process_response(struct mtouch *mtouch)
{ … }

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

/*
 * mtouch_disconnect() is the opposite of mtouch_connect()
 */

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

/*
 * mtouch_connect() is the routine that is called when someone adds a
 * new serio device that supports MicroTouch (Format Tablet) protocol and registers it as
 * an input device.
 */

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

/*
 * The serio driver structure.
 */

static const struct serio_device_id mtouch_serio_ids[] = …;

MODULE_DEVICE_TABLE(serio, mtouch_serio_ids);

static struct serio_driver mtouch_drv = …;

module_serio_driver(…) …;