1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
297 lines
7.9 KiB
C
297 lines
7.9 KiB
C
/*
|
|
* $Id: twidjoy.c,v 1.5 2002/01/22 20:31:53 vojtech Exp $
|
|
*
|
|
* derived from CVS-ID "stinger.c,v 1.5 2001/05/29 12:57:18 vojtech Exp"
|
|
*
|
|
* Copyright (c) 2001 Arndt Schoenewald
|
|
* Copyright (c) 2000-2001 Vojtech Pavlik
|
|
* Copyright (c) 2000 Mark Fletcher
|
|
*
|
|
* Sponsored by Quelltext AG (http://www.quelltext-ag.de), Dortmund, Germany
|
|
*/
|
|
|
|
/*
|
|
* Driver to use Handykey's Twiddler (the first edition, i.e. the one with
|
|
* the RS232 interface) as a joystick under Linux
|
|
*
|
|
* The Twiddler is a one-handed chording keyboard featuring twelve buttons on
|
|
* the front, six buttons on the top, and a built-in tilt sensor. The buttons
|
|
* on the front, which are grouped as four rows of three buttons, are pressed
|
|
* by the four fingers (this implies only one button per row can be held down
|
|
* at the same time) and the buttons on the top are for the thumb. The tilt
|
|
* sensor delivers X and Y axis data depending on how the Twiddler is held.
|
|
* Additional information can be found at http://www.handykey.com.
|
|
*
|
|
* This driver does not use the Twiddler for its intended purpose, i.e. as
|
|
* a chording keyboard, but as a joystick: pressing and releasing a button
|
|
* immediately sends a corresponding button event, and tilting it generates
|
|
* corresponding ABS_X and ABS_Y events. This turns the Twiddler into a game
|
|
* controller with amazing 18 buttons :-)
|
|
*
|
|
* Note: The Twiddler2 (the successor of the Twiddler that connects directly
|
|
* to the PS/2 keyboard and mouse ports) is NOT supported by this driver!
|
|
*
|
|
* For questions or feedback regarding this driver module please contact:
|
|
* Arndt Schoenewald <arndt@quelltext.com>
|
|
*/
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
#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 "Handykey Twiddler keyboard as a joystick driver"
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/*
|
|
* Constants.
|
|
*/
|
|
|
|
#define TWIDJOY_MAX_LENGTH 5
|
|
|
|
static char *twidjoy_name = "Handykey Twiddler";
|
|
|
|
static struct twidjoy_button_spec {
|
|
int bitshift;
|
|
int bitmask;
|
|
int buttons[3];
|
|
}
|
|
twidjoy_buttons[] = {
|
|
{ 0, 3, { BTN_A, BTN_B, BTN_C } },
|
|
{ 2, 3, { BTN_X, BTN_Y, BTN_Z } },
|
|
{ 4, 3, { BTN_TL, BTN_TR, BTN_TR2 } },
|
|
{ 6, 3, { BTN_SELECT, BTN_START, BTN_MODE } },
|
|
{ 8, 1, { BTN_BASE5 } },
|
|
{ 9, 1, { BTN_BASE } },
|
|
{ 10, 1, { BTN_BASE3 } },
|
|
{ 11, 1, { BTN_BASE4 } },
|
|
{ 12, 1, { BTN_BASE2 } },
|
|
{ 13, 1, { BTN_BASE6 } },
|
|
{ 0, 0, { 0 } }
|
|
};
|
|
|
|
/*
|
|
* Per-Twiddler data.
|
|
*/
|
|
|
|
struct twidjoy {
|
|
struct input_dev dev;
|
|
int idx;
|
|
unsigned char data[TWIDJOY_MAX_LENGTH];
|
|
char phys[32];
|
|
};
|
|
|
|
/*
|
|
* twidjoy_process_packet() decodes packets the driver receives from the
|
|
* Twiddler. It updates the data accordingly.
|
|
*/
|
|
|
|
static void twidjoy_process_packet(struct twidjoy *twidjoy, struct pt_regs *regs)
|
|
{
|
|
if (twidjoy->idx == TWIDJOY_MAX_LENGTH) {
|
|
struct input_dev *dev = &twidjoy->dev;
|
|
unsigned char *data = twidjoy->data;
|
|
struct twidjoy_button_spec *bp;
|
|
int button_bits, abs_x, abs_y;
|
|
|
|
button_bits = ((data[1] & 0x7f) << 7) | (data[0] & 0x7f);
|
|
|
|
input_regs(dev, regs);
|
|
|
|
for (bp = twidjoy_buttons; bp->bitmask; bp++) {
|
|
int value = (button_bits & (bp->bitmask << bp->bitshift)) >> bp->bitshift;
|
|
int i;
|
|
|
|
for (i = 0; i < bp->bitmask; i++)
|
|
input_report_key(dev, bp->buttons[i], i+1 == value);
|
|
}
|
|
|
|
abs_x = ((data[4] & 0x07) << 5) | ((data[3] & 0x7C) >> 2);
|
|
if (data[4] & 0x08) abs_x -= 256;
|
|
|
|
abs_y = ((data[3] & 0x01) << 7) | ((data[2] & 0x7F) >> 0);
|
|
if (data[3] & 0x02) abs_y -= 256;
|
|
|
|
input_report_abs(dev, ABS_X, -abs_x);
|
|
input_report_abs(dev, ABS_Y, +abs_y);
|
|
|
|
input_sync(dev);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* twidjoy_interrupt() is called by the low level driver when characters
|
|
* are ready for us. We then buffer them for further processing, or call the
|
|
* packet processing routine.
|
|
*/
|
|
|
|
static irqreturn_t twidjoy_interrupt(struct serio *serio, unsigned char data, unsigned int flags, struct pt_regs *regs)
|
|
{
|
|
struct twidjoy *twidjoy = serio_get_drvdata(serio);
|
|
|
|
/* All Twiddler packets are 5 bytes. The fact that the first byte
|
|
* has a MSB of 0 and all other bytes have a MSB of 1 can be used
|
|
* to check and regain sync. */
|
|
|
|
if ((data & 0x80) == 0)
|
|
twidjoy->idx = 0; /* this byte starts a new packet */
|
|
else if (twidjoy->idx == 0)
|
|
return IRQ_HANDLED; /* wrong MSB -- ignore this byte */
|
|
|
|
if (twidjoy->idx < TWIDJOY_MAX_LENGTH)
|
|
twidjoy->data[twidjoy->idx++] = data;
|
|
|
|
if (twidjoy->idx == TWIDJOY_MAX_LENGTH) {
|
|
twidjoy_process_packet(twidjoy, regs);
|
|
twidjoy->idx = 0;
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* twidjoy_disconnect() is the opposite of twidjoy_connect()
|
|
*/
|
|
|
|
static void twidjoy_disconnect(struct serio *serio)
|
|
{
|
|
struct twidjoy *twidjoy = serio_get_drvdata(serio);
|
|
|
|
input_unregister_device(&twidjoy->dev);
|
|
serio_close(serio);
|
|
serio_set_drvdata(serio, NULL);
|
|
kfree(twidjoy);
|
|
}
|
|
|
|
/*
|
|
* twidjoy_connect() is the routine that is called when someone adds a
|
|
* new serio device. It looks for the Twiddler, and if found, registers
|
|
* it as an input device.
|
|
*/
|
|
|
|
static int twidjoy_connect(struct serio *serio, struct serio_driver *drv)
|
|
{
|
|
struct twidjoy_button_spec *bp;
|
|
struct twidjoy *twidjoy;
|
|
int i;
|
|
int err;
|
|
|
|
if (!(twidjoy = kmalloc(sizeof(struct twidjoy), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
|
|
memset(twidjoy, 0, sizeof(struct twidjoy));
|
|
|
|
sprintf(twidjoy->phys, "%s/input0", serio->phys);
|
|
|
|
init_input_dev(&twidjoy->dev);
|
|
twidjoy->dev.name = twidjoy_name;
|
|
twidjoy->dev.phys = twidjoy->phys;
|
|
twidjoy->dev.id.bustype = BUS_RS232;
|
|
twidjoy->dev.id.vendor = SERIO_TWIDJOY;
|
|
twidjoy->dev.id.product = 0x0001;
|
|
twidjoy->dev.id.version = 0x0100;
|
|
twidjoy->dev.dev = &serio->dev;
|
|
|
|
twidjoy->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
|
|
|
|
for (bp = twidjoy_buttons; bp->bitmask; bp++) {
|
|
for (i = 0; i < bp->bitmask; i++)
|
|
set_bit(bp->buttons[i], twidjoy->dev.keybit);
|
|
}
|
|
|
|
twidjoy->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
twidjoy->dev.absmax[ABS_X+i] = 50;
|
|
twidjoy->dev.absmin[ABS_X+i] = -50;
|
|
|
|
/* TODO: arndt 20010708: Are these values appropriate? */
|
|
twidjoy->dev.absfuzz[ABS_X+i] = 4;
|
|
twidjoy->dev.absflat[ABS_X+i] = 4;
|
|
}
|
|
|
|
twidjoy->dev.private = twidjoy;
|
|
|
|
serio_set_drvdata(serio, twidjoy);
|
|
|
|
err = serio_open(serio, drv);
|
|
if (err) {
|
|
serio_set_drvdata(serio, NULL);
|
|
kfree(twidjoy);
|
|
return err;
|
|
}
|
|
|
|
input_register_device(&twidjoy->dev);
|
|
|
|
printk(KERN_INFO "input: %s on %s\n", twidjoy_name, serio->phys);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The serio driver structure.
|
|
*/
|
|
|
|
static struct serio_device_id twidjoy_serio_ids[] = {
|
|
{
|
|
.type = SERIO_RS232,
|
|
.proto = SERIO_TWIDJOY,
|
|
.id = SERIO_ANY,
|
|
.extra = SERIO_ANY,
|
|
},
|
|
{ 0 }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(serio, twidjoy_serio_ids);
|
|
|
|
static struct serio_driver twidjoy_drv = {
|
|
.driver = {
|
|
.name = "twidjoy",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = twidjoy_serio_ids,
|
|
.interrupt = twidjoy_interrupt,
|
|
.connect = twidjoy_connect,
|
|
.disconnect = twidjoy_disconnect,
|
|
};
|
|
|
|
/*
|
|
* The functions for inserting/removing us as a module.
|
|
*/
|
|
|
|
int __init twidjoy_init(void)
|
|
{
|
|
serio_register_driver(&twidjoy_drv);
|
|
return 0;
|
|
}
|
|
|
|
void __exit twidjoy_exit(void)
|
|
{
|
|
serio_unregister_driver(&twidjoy_drv);
|
|
}
|
|
|
|
module_init(twidjoy_init);
|
|
module_exit(twidjoy_exit);
|