kernel_optimize_test/drivers/input/touchscreen/gunze.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

173 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2000-2001 Vojtech Pavlik
*/
/*
* Gunze AHL-51S touchscreen driver for Linux
*/
/*
*/
#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 "Gunze AHL-51S touchscreen driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Definitions & global arrays.
*/
#define GUNZE_MAX_LENGTH 10
/*
* Per-touchscreen data.
*/
struct gunze {
struct input_dev *dev;
struct serio *serio;
int idx;
unsigned char data[GUNZE_MAX_LENGTH];
char phys[32];
};
static void gunze_process_packet(struct gunze *gunze)
{
struct input_dev *dev = gunze->dev;
if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' ||
(gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
return;
}
input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
input_sync(dev);
}
static irqreturn_t gunze_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct gunze *gunze = serio_get_drvdata(serio);
if (data == '\r') {
gunze_process_packet(gunze);
gunze->idx = 0;
} else {
if (gunze->idx < GUNZE_MAX_LENGTH)
gunze->data[gunze->idx++] = data;
}
return IRQ_HANDLED;
}
/*
* gunze_disconnect() is the opposite of gunze_connect()
*/
static void gunze_disconnect(struct serio *serio)
{
struct gunze *gunze = serio_get_drvdata(serio);
input_get_device(gunze->dev);
input_unregister_device(gunze->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(gunze->dev);
kfree(gunze);
}
/*
* gunze_connect() is the routine that is called when someone adds a
* new serio device that supports Gunze protocol and registers it as
* an input device.
*/
static int gunze_connect(struct serio *serio, struct serio_driver *drv)
{
struct gunze *gunze;
struct input_dev *input_dev;
int err;
gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
input_dev = input_allocate_device();
if (!gunze || !input_dev) {
err = -ENOMEM;
goto fail1;
}
gunze->serio = serio;
gunze->dev = input_dev;
snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
input_dev->name = "Gunze AHL-51S TouchScreen";
input_dev->phys = gunze->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_GUNZE;
input_dev->id.product = 0x0051;
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(input_dev, ABS_X, 24, 1000, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
serio_set_drvdata(serio, gunze);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(gunze->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(gunze);
return err;
}
/*
* The serio driver structure.
*/
static const struct serio_device_id gunze_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_GUNZE,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, gunze_serio_ids);
static struct serio_driver gunze_drv = {
.driver = {
.name = "gunze",
},
.description = DRIVER_DESC,
.id_table = gunze_serio_ids,
.interrupt = gunze_interrupt,
.connect = gunze_connect,
.disconnect = gunze_disconnect,
};
module_serio_driver(gunze_drv);