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Release 4.11 drivers/input/touchscreen/touchright.c

/*
 * Touchright serial touchscreen driver
 *
 * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
 *
 * Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
 * Copyright (c) 2004 Vojtech Pavlik
 * and Dan Streetman <ddstreet@ieee.org>
 */

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#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	"Touchright serial touchscreen driver"

MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Definitions & global arrays.
 */


#define TR_FORMAT_TOUCH_BIT	0x01

#define TR_FORMAT_STATUS_BYTE	0x40

#define TR_FORMAT_STATUS_MASK	~TR_FORMAT_TOUCH_BIT


#define TR_LENGTH 5


#define TR_MIN_XC 0

#define TR_MAX_XC 0x1ff

#define TR_MIN_YC 0

#define TR_MAX_YC 0x1ff

/*
 * Per-touchscreen data.
 */


struct tr {
	
struct input_dev *dev;
	
struct serio *serio;
	
int idx;
	
unsigned char data[TR_LENGTH];
	
char phys[32];
};


static irqreturn_t tr_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct tr *tr = serio_get_drvdata(serio); struct input_dev *dev = tr->dev; tr->data[tr->idx] = data; if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) { if (++tr->idx == TR_LENGTH) { input_report_abs(dev, ABS_X, (tr->data[1] << 5) | (tr->data[2] >> 1)); input_report_abs(dev, ABS_Y, (tr->data[3] << 5) | (tr->data[4] >> 1)); input_report_key(dev, BTN_TOUCH, tr->data[0] & TR_FORMAT_TOUCH_BIT); input_sync(dev); tr->idx = 0; } } return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Rick Koch165100.00%1100.00%
Total165100.00%1100.00%

/* * tr_disconnect() is the opposite of tr_connect() */
static void tr_disconnect(struct serio *serio) { struct tr *tr = serio_get_drvdata(serio); input_get_device(tr->dev); input_unregister_device(tr->dev); serio_close(serio); serio_set_drvdata(serio, NULL); input_put_device(tr->dev); kfree(tr); }

Contributors

PersonTokensPropCommitsCommitProp
Rick Koch59100.00%1100.00%
Total59100.00%1100.00%

/* * tr_connect() is the routine that is called when someone adds a * new serio device that supports the Touchright protocol and registers it as * an input device. */
static int tr_connect(struct serio *serio, struct serio_driver *drv) { struct tr *tr; struct input_dev *input_dev; int err; tr = kzalloc(sizeof(struct tr), GFP_KERNEL); input_dev = input_allocate_device(); if (!tr || !input_dev) { err = -ENOMEM; goto fail1; } tr->serio = serio; tr->dev = input_dev; snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys); input_dev->name = "Touchright Serial TouchScreen"; input_dev->phys = tr->phys; input_dev->id.bustype = BUS_RS232; input_dev->id.vendor = SERIO_TOUCHRIGHT; input_dev->id.product = 0; input_dev->id.version = 0x0100; input_dev->dev.parent = &serio->dev; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0); input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0); serio_set_drvdata(serio, tr); err = serio_open(serio, drv); if (err) goto fail2; err = input_register_device(tr->dev); if (err) goto fail3; return 0; fail3: serio_close(serio); fail2: serio_set_drvdata(serio, NULL); fail1: input_free_device(input_dev); kfree(tr); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Rick Koch27894.88%133.33%
Dmitry Torokhov113.75%133.33%
Jiri Slaby41.37%133.33%
Total293100.00%3100.00%

/* * The serio driver structure. */ static struct serio_device_id tr_serio_ids[] = { { .type = SERIO_RS232, .proto = SERIO_TOUCHRIGHT, .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; MODULE_DEVICE_TABLE(serio, tr_serio_ids); static struct serio_driver tr_drv = { .driver = { .name = "touchright", }, .description = DRIVER_DESC, .id_table = tr_serio_ids, .interrupt = tr_interrupt, .connect = tr_connect, .disconnect = tr_disconnect, }; module_serio_driver(tr_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Rick Koch69597.61%125.00%
Dmitry Torokhov111.54%125.00%
Jiri Slaby40.56%125.00%
Axel Lin20.28%125.00%
Total712100.00%4100.00%
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