/*
* Copyright (c) 2001 Vojtech Pavlik
*/
/*
* Guillemot Digital Interface Protocol 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/delay.h>
#include <linux/init.h>
#include <linux/gameport.h>
#include <linux/input.h>
#include <linux/jiffies.h>
#define DRIVER_DESC "Guillemot Digital joystick driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
#define GUILLEMOT_MAX_START 600 /* 600 us */
#define GUILLEMOT_MAX_STROBE 60 /* 60 us */
#define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */
static short guillemot_abs_pad[] =
{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
static short guillemot_btn_pad[] =
{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
static struct {
int x;
int y;
} guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
struct guillemot_type {
unsigned char id;
short *abs;
short *btn;
int hat;
char *name;
};
struct guillemot {
struct gameport *gameport;
struct input_dev *dev;
int bads;
int reads;
struct guillemot_type *type;
unsigned char length;
char phys[32];
};
static struct guillemot_type guillemot_type[] = {
{ 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
{ 0 }};
/*
* guillemot_read_packet() reads Guillemot joystick data.
*/
static int guillemot_read_packet(struct gameport *gameport, u8 *data)
{
unsigned long flags;
unsigned char u, v;
unsigned int t, s;
int i;
for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
data[i] = 0;
i = 0;
t = gameport_time(gameport, GUILLEMOT_MAX_START);
s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
local_irq_save(flags);
gameport_trigger(gameport);
v = gameport_read(gameport);
while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
t--;
u = v; v = gameport_read(gameport);
if (v & ~u & 0x10) {
data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
i++;
t = s;
}
}
local_irq_restore(flags);
return i;
}
/*
* guillemot_poll() reads and analyzes Guillemot joystick data.
*/
static void guillemot_poll(struct gameport *gameport)
{
struct guillemot *guillemot = gameport_get_drvdata(gameport);
struct input_dev *dev = guillemot->dev;
u8 data[GUILLEMOT_MAX_LENGTH];
int i;
guillemot->reads++;
if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
data[0] != 0x55 || data[16] != 0xaa) {
guillemot->bads++;
} else {
for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
if (guillemot->type->hat) {
input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
}
for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
}
input_sync(dev);
}
/*
* guillemot_open() is a callback from the input open routine.
*/
static int guillemot_open(struct input_dev *dev)
{
struct guillemot *guillemot = input_get_drvdata(dev);
gameport_start_polling(guillemot->gameport);
return 0;
}
/*
* guillemot_close() is a callback from the input close routine.
*/
static void guillemot_close(struct input_dev *dev)
{
struct guillemot *guillemot = input_get_drvdata(dev);
gameport_stop_polling(guillemot->gameport);
}
/*
* guillemot_connect() probes for Guillemot joysticks.
*/
static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
{
struct guillemot *guillemot;
struct input_dev *input_dev;
u8 data[GUILLEMOT_MAX_LENGTH];
int i, t;
int err;
guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
input_dev = input_allocate_device();
if (!guillemot || !input_dev) {
err = -ENOMEM;
goto fail1;
}
guillemot->gameport = gameport;
guillemot->dev = input_dev;
gameport_set_drvdata(gameport, guillemot);
err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
if (err)
goto fail1;
i = guillemot_read_packet(gameport, data);
if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
err = -ENODEV;
goto fail2;
}
for (i = 0; guillemot_type[i].name; i++)
if (guillemot_type[i].id == data[11])
break;
if (!guillemot_type[i].name) {
printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
gameport->phys, data[12], data[13], data[11], data[14], data[15]);
err = -ENODEV;
goto fail2;
}
gameport_set_poll_handler(gameport, guillemot_poll);
gameport_set_poll_interval(gameport, 20);
snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
guillemot->type = guillemot_type + i;
input_dev->name = guillemot_type[i].name;
input_dev->phys = guillemot->phys;
input_dev->id.bustype = BUS_GAMEPORT;
input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
input_dev->id.product = guillemot_type[i].id;
input_dev->id.version = (int)data[14] << 8 | data[15];
input_dev->dev.parent = &gameport->dev;
input_set_drvdata(input_dev, guillemot);
input_dev->open = guillemot_open;
input_dev->close = guillemot_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
input_set_abs_params(input_dev, t, 0, 255, 0, 0);
if (guillemot->type->hat) {
input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
}
for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
set_bit(t, input_dev->keybit);
err = input_register_device(guillemot->dev);
if (err)
goto fail2;
return 0;
fail2: gameport_close(gameport);
fail1: gameport_set_drvdata(gameport, NULL);
input_free_device(input_dev);
kfree(guillemot);
return err;
}
static void guillemot_disconnect(struct gameport *gameport)
{
struct guillemot *guillemot = gameport_get_drvdata(gameport);
printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
input_unregister_device(guillemot->dev);
gameport_close(gameport);
kfree(guillemot);
}
static struct gameport_driver guillemot_drv = {
.driver = {
.name = "guillemot",
},
.description = DRIVER_DESC,
.connect = guillemot_connect,
.disconnect = guillemot_disconnect,
};
static int __init guillemot_init(void)
{
return gameport_register_driver(&guillemot_drv);
}
static void __exit guillemot_exit(void)
{
gameport_unregister_driver(&guillemot_drv);
}
module_init(guillemot_init);
module_exit(guillemot_exit);
