205 lines
4.8 KiB
C
205 lines
4.8 KiB
C
/*
|
|
* Copyright (c) 2000-2001 Vojtech Pavlik
|
|
*/
|
|
|
|
/*
|
|
* Gunze AHL-51S touchscreen driver for Linux
|
|
*/
|
|
|
|
/*
|
|
* 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
|
|
*
|
|
* Should you need to contact me, the author, you can do so either by
|
|
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
|
|
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/input.h>
|
|
#include <linux/serio.h>
|
|
#include <linux/init.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 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,
|
|
};
|
|
|
|
/*
|
|
* The functions for inserting/removing us as a module.
|
|
*/
|
|
|
|
static int __init gunze_init(void)
|
|
{
|
|
return serio_register_driver(&gunze_drv);
|
|
}
|
|
|
|
static void __exit gunze_exit(void)
|
|
{
|
|
serio_unregister_driver(&gunze_drv);
|
|
}
|
|
|
|
module_init(gunze_init);
|
|
module_exit(gunze_exit);
|