mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 16:12:02 +00:00
276 lines
6.6 KiB
C
276 lines
6.6 KiB
C
/*
|
|
* Copyright (c) 1999-2001 Vojtech Pavlik
|
|
*/
|
|
|
|
/*
|
|
* Creative Labs Blaster GamePad Cobra 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/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/gameport.h>
|
|
#include <linux/input.h>
|
|
#include <linux/jiffies.h>
|
|
|
|
#define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver"
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */
|
|
#define COBRA_LENGTH 36
|
|
|
|
static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 };
|
|
|
|
struct cobra {
|
|
struct gameport *gameport;
|
|
struct input_dev *dev[2];
|
|
int reads;
|
|
int bads;
|
|
unsigned char exists;
|
|
char phys[2][32];
|
|
};
|
|
|
|
static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data)
|
|
{
|
|
unsigned long flags;
|
|
unsigned char u, v, w;
|
|
__u64 buf[2];
|
|
int r[2], t[2];
|
|
int i, j, ret;
|
|
|
|
int strobe = gameport_time(gameport, COBRA_MAX_STROBE);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
r[i] = buf[i] = 0;
|
|
t[i] = COBRA_MAX_STROBE;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
|
|
u = gameport_read(gameport);
|
|
|
|
do {
|
|
t[0]--; t[1]--;
|
|
v = gameport_read(gameport);
|
|
for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
|
|
if (w & 0x30) {
|
|
if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
|
|
buf[i] |= (__u64)((w >> 5) & 1) << r[i]++;
|
|
t[i] = strobe;
|
|
u = v;
|
|
} else t[i] = 0;
|
|
}
|
|
} while (t[0] > 0 || t[1] > 0);
|
|
|
|
local_irq_restore(flags);
|
|
|
|
ret = 0;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
if (r[i] != COBRA_LENGTH) continue;
|
|
|
|
for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
|
|
buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));
|
|
|
|
if (j < COBRA_LENGTH) ret |= (1 << i);
|
|
|
|
data[i] = ((buf[i] >> 7) & 0x000001f) | ((buf[i] >> 8) & 0x00003e0)
|
|
| ((buf[i] >> 9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000)
|
|
| ((buf[i] >> 11) & 0x1f00000);
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void cobra_poll(struct gameport *gameport)
|
|
{
|
|
struct cobra *cobra = gameport_get_drvdata(gameport);
|
|
struct input_dev *dev;
|
|
unsigned int data[2];
|
|
int i, j, r;
|
|
|
|
cobra->reads++;
|
|
|
|
if ((r = cobra_read_packet(gameport, data)) != cobra->exists) {
|
|
cobra->bads++;
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < 2; i++)
|
|
if (cobra->exists & r & (1 << i)) {
|
|
|
|
dev = cobra->dev[i];
|
|
|
|
input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
|
|
input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));
|
|
|
|
for (j = 0; cobra_btn[j]; j++)
|
|
input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));
|
|
|
|
input_sync(dev);
|
|
|
|
}
|
|
}
|
|
|
|
static int cobra_open(struct input_dev *dev)
|
|
{
|
|
struct cobra *cobra = input_get_drvdata(dev);
|
|
|
|
gameport_start_polling(cobra->gameport);
|
|
return 0;
|
|
}
|
|
|
|
static void cobra_close(struct input_dev *dev)
|
|
{
|
|
struct cobra *cobra = input_get_drvdata(dev);
|
|
|
|
gameport_stop_polling(cobra->gameport);
|
|
}
|
|
|
|
static int cobra_connect(struct gameport *gameport, struct gameport_driver *drv)
|
|
{
|
|
struct cobra *cobra;
|
|
struct input_dev *input_dev;
|
|
unsigned int data[2];
|
|
int i, j;
|
|
int err;
|
|
|
|
cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL);
|
|
if (!cobra)
|
|
return -ENOMEM;
|
|
|
|
cobra->gameport = gameport;
|
|
|
|
gameport_set_drvdata(gameport, cobra);
|
|
|
|
err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
|
|
if (err)
|
|
goto fail1;
|
|
|
|
cobra->exists = cobra_read_packet(gameport, data);
|
|
|
|
for (i = 0; i < 2; i++)
|
|
if ((cobra->exists >> i) & data[i] & 1) {
|
|
printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d"
|
|
" Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7);
|
|
cobra->exists &= ~(1 << i);
|
|
}
|
|
|
|
if (!cobra->exists) {
|
|
err = -ENODEV;
|
|
goto fail2;
|
|
}
|
|
|
|
gameport_set_poll_handler(gameport, cobra_poll);
|
|
gameport_set_poll_interval(gameport, 20);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
if (~(cobra->exists >> i) & 1)
|
|
continue;
|
|
|
|
cobra->dev[i] = input_dev = input_allocate_device();
|
|
if (!input_dev) {
|
|
err = -ENOMEM;
|
|
goto fail3;
|
|
}
|
|
|
|
snprintf(cobra->phys[i], sizeof(cobra->phys[i]),
|
|
"%s/input%d", gameport->phys, i);
|
|
|
|
input_dev->name = "Creative Labs Blaster GamePad Cobra";
|
|
input_dev->phys = cobra->phys[i];
|
|
input_dev->id.bustype = BUS_GAMEPORT;
|
|
input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE;
|
|
input_dev->id.product = 0x0008;
|
|
input_dev->id.version = 0x0100;
|
|
input_dev->dev.parent = &gameport->dev;
|
|
|
|
input_set_drvdata(input_dev, cobra);
|
|
|
|
input_dev->open = cobra_open;
|
|
input_dev->close = cobra_close;
|
|
|
|
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
|
|
input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
|
|
input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
|
|
for (j = 0; cobra_btn[j]; j++)
|
|
set_bit(cobra_btn[j], input_dev->keybit);
|
|
|
|
err = input_register_device(cobra->dev[i]);
|
|
if (err)
|
|
goto fail4;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail4: input_free_device(cobra->dev[i]);
|
|
fail3: while (--i >= 0)
|
|
if (cobra->dev[i])
|
|
input_unregister_device(cobra->dev[i]);
|
|
fail2: gameport_close(gameport);
|
|
fail1: gameport_set_drvdata(gameport, NULL);
|
|
kfree(cobra);
|
|
return err;
|
|
}
|
|
|
|
static void cobra_disconnect(struct gameport *gameport)
|
|
{
|
|
struct cobra *cobra = gameport_get_drvdata(gameport);
|
|
int i;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
if ((cobra->exists >> i) & 1)
|
|
input_unregister_device(cobra->dev[i]);
|
|
gameport_close(gameport);
|
|
gameport_set_drvdata(gameport, NULL);
|
|
kfree(cobra);
|
|
}
|
|
|
|
static struct gameport_driver cobra_drv = {
|
|
.driver = {
|
|
.name = "cobra",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.connect = cobra_connect,
|
|
.disconnect = cobra_disconnect,
|
|
};
|
|
|
|
static int __init cobra_init(void)
|
|
{
|
|
return gameport_register_driver(&cobra_drv);
|
|
}
|
|
|
|
static void __exit cobra_exit(void)
|
|
{
|
|
gameport_unregister_driver(&cobra_drv);
|
|
}
|
|
|
|
module_init(cobra_init);
|
|
module_exit(cobra_exit);
|