/*
* $Id: spaceorb.c,v 1.15 2002/01/22 20:29:19 vojtech Exp $
*
* Copyright (c) 1999-2001 Vojtech Pavlik
*
* Based on the work of:
* David Thompson
*/
/*
* SpaceTec SpaceOrb 360 and Avenger 6dof controller 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/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Constants.
*/
#define SPACEORB_MAX_LENGTH 64
static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
/*
* Per-Orb data.
*/
struct spaceorb {
struct input_dev *dev;
int idx;
unsigned char data[SPACEORB_MAX_LENGTH];
char phys[32];
};
static unsigned char spaceorb_xor[] = "SpaceWare";
static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
"Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
/*
* spaceorb_process_packet() decodes packets the driver receives from the
* SpaceOrb.
*/
static void spaceorb_process_packet(struct spaceorb *spaceorb)
{
struct input_dev *dev = spaceorb->dev;
unsigned char *data = spaceorb->data;
unsigned char c = 0;
int axes[6];
int i;
if (spaceorb->idx < 2) return;
for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
if (c) return;
switch (data[0]) {
case 'R': /* Reset packet */
spaceorb->data[spaceorb->idx - 1] = 0;
for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
printk(KERN_INFO "input: %s [%s] is %s\n",
dev->name, spaceorb->data + i, spaceorb->phys);
break;
case 'D': /* Ball + button data */
if (spaceorb->idx != 12) return;
for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
axes[0] = ( data[2] << 3) | (data[ 3] >> 4);
axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
for (i = 0; i < 6; i++)
input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
for (i = 0; i < 6; i++)
input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
break;
case 'K': /* Button data */
if (spaceorb->idx != 5) return;
for (i = 0; i < 6; i++)
input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
break;
case 'E': /* Error packet */
if (spaceorb->idx != 4) return;
printk(KERN_ERR "spaceorb: Device error. [ ");
for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
printk("]\n");
break;
}
input_sync(dev);
}
static irqreturn_t spaceorb_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct spaceorb* spaceorb = serio_get_drvdata(serio);
if (~data & 0x80) {
if (spaceorb->idx) spaceorb_process_packet(spaceorb);
spaceorb->idx = 0;
}
if (spaceorb->idx < SPACEORB_MAX_LENGTH)
spaceorb->data[spaceorb->idx++] = data & 0x7f;
return IRQ_HANDLED;
}
/*
* spaceorb_disconnect() is the opposite of spaceorb_connect()
*/
static void spaceorb_disconnect(struct serio *serio)
{
struct spaceorb* spaceorb = serio_get_drvdata(serio);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_unregister_device(spaceorb->dev);
kfree(spaceorb);
}
/*
* spaceorb_connect() is the routine that is called when someone adds a
* new serio device that supports SpaceOrb/Avenger protocol and registers
* it as an input device.
*/
static int spaceorb_connect(struct serio *serio, struct serio_driver *drv)
{
struct spaceorb *spaceorb;
struct input_dev *input_dev;
int err = -ENOMEM;
int i;
spaceorb = kzalloc(sizeof(struct spaceorb), GFP_KERNEL);
input_dev = input_allocate_device();
if (!spaceorb || !input_dev)
goto fail1;
spaceorb->dev = input_dev;
snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
input_dev->phys = spaceorb->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_SPACEORB;
input_dev->id.product = 0x0001;
input_dev->id.version = 0x0100;
input_dev->cdev.dev = &serio->dev;
input_dev->private = spaceorb;
input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
for (i = 0; i < 6; i++)
set_bit(spaceorb_buttons[i], input_dev->keybit);
for (i = 0; i < 6; i++)
input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);
serio_set_drvdata(serio, spaceorb);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(spaceorb->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(spaceorb);
return err;
}
/*
* The serio driver structure.
*/
static struct serio_device_id spaceorb_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_SPACEORB,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);
static struct serio_driver spaceorb_drv = {
.driver = {
.name = "spaceorb",
},
.description = DRIVER_DESC,
.id_table = spaceorb_serio_ids,
.interrupt = spaceorb_interrupt,
.connect = spaceorb_connect,
.disconnect = spaceorb_disconnect,
};
/*
* The functions for inserting/removing us as a module.
*/
static int __init spaceorb_init(void)
{
return serio_register_driver(&spaceorb_drv);
}
static void __exit spaceorb_exit(void)
{
serio_unregister_driver(&spaceorb_drv);
}
module_init(spaceorb_init);
module_exit(spaceorb_exit);
