289 lines
7.2 KiB
C
289 lines
7.2 KiB
C
/*
|
|
* $Id: ns558.c,v 1.43 2002/01/24 19:23:21 vojtech Exp $
|
|
*
|
|
* Copyright (c) 1999-2001 Vojtech Pavlik
|
|
* Copyright (c) 1999 Brian Gerst
|
|
*/
|
|
|
|
/*
|
|
* NS558 based standard IBM game port 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 <asm/io.h>
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/gameport.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pnp.h>
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
|
|
MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
|
|
0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
|
|
|
|
struct ns558 {
|
|
int type;
|
|
int io;
|
|
int size;
|
|
struct pnp_dev *dev;
|
|
struct gameport *gameport;
|
|
struct list_head node;
|
|
};
|
|
|
|
static LIST_HEAD(ns558_list);
|
|
|
|
/*
|
|
* ns558_isa_probe() tries to find an isa gameport at the
|
|
* specified address, and also checks for mirrors.
|
|
* A joystick must be attached for this to work.
|
|
*/
|
|
|
|
static int ns558_isa_probe(int io)
|
|
{
|
|
int i, j, b;
|
|
unsigned char c, u, v;
|
|
struct ns558 *ns558;
|
|
struct gameport *port;
|
|
|
|
/*
|
|
* No one should be using this address.
|
|
*/
|
|
|
|
if (!request_region(io, 1, "ns558-isa"))
|
|
return -EBUSY;
|
|
|
|
/*
|
|
* We must not be able to write arbitrary values to the port.
|
|
* The lower two axis bits must be 1 after a write.
|
|
*/
|
|
|
|
c = inb(io);
|
|
outb(~c & ~3, io);
|
|
if (~(u = v = inb(io)) & 3) {
|
|
outb(c, io);
|
|
release_region(io, 1);
|
|
return -ENODEV;
|
|
}
|
|
/*
|
|
* After a trigger, there must be at least some bits changing.
|
|
*/
|
|
|
|
for (i = 0; i < 1000; i++) v &= inb(io);
|
|
|
|
if (u == v) {
|
|
outb(c, io);
|
|
release_region(io, 1);
|
|
return -ENODEV;
|
|
}
|
|
msleep(3);
|
|
/*
|
|
* After some time (4ms) the axes shouldn't change anymore.
|
|
*/
|
|
|
|
u = inb(io);
|
|
for (i = 0; i < 1000; i++)
|
|
if ((u ^ inb(io)) & 0xf) {
|
|
outb(c, io);
|
|
release_region(io, 1);
|
|
return -ENODEV;
|
|
}
|
|
/*
|
|
* And now find the number of mirrors of the port.
|
|
*/
|
|
|
|
for (i = 1; i < 5; i++) {
|
|
|
|
release_region(io & (-1 << (i - 1)), (1 << (i - 1)));
|
|
|
|
if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
|
|
break; /* Don't disturb anyone */
|
|
|
|
outb(0xff, io & (-1 << i));
|
|
for (j = b = 0; j < 1000; j++)
|
|
if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
|
|
msleep(3);
|
|
|
|
if (b > 300) { /* We allow 30% difference */
|
|
release_region(io & (-1 << i), (1 << i));
|
|
break;
|
|
}
|
|
}
|
|
|
|
i--;
|
|
|
|
if (i != 4) {
|
|
if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
|
|
return -EBUSY;
|
|
}
|
|
|
|
ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
|
|
port = gameport_allocate_port();
|
|
if (!ns558 || !port) {
|
|
printk(KERN_ERR "ns558: Memory allocation failed.\n");
|
|
release_region(io & (-1 << i), (1 << i));
|
|
kfree(ns558);
|
|
gameport_free_port(port);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ns558->io = io;
|
|
ns558->size = 1 << i;
|
|
ns558->gameport = port;
|
|
|
|
port->io = io;
|
|
gameport_set_name(port, "NS558 ISA Gameport");
|
|
gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i));
|
|
|
|
gameport_register_port(port);
|
|
|
|
list_add(&ns558->node, &ns558_list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PNP
|
|
|
|
static struct pnp_device_id pnp_devids[] = {
|
|
{ .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */
|
|
{ .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */
|
|
{ .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */
|
|
{ .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */
|
|
{ .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */
|
|
{ .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */
|
|
{ .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */
|
|
{ .id = "CSC0001", .driver_data = 0 }, /* CS4232 */
|
|
{ .id = "CSC000f", .driver_data = 0 }, /* CS4236 */
|
|
{ .id = "CSC0101", .driver_data = 0 }, /* CS4327 */
|
|
{ .id = "CTL7001", .driver_data = 0 }, /* SB16 */
|
|
{ .id = "CTL7002", .driver_data = 0 }, /* AWE64 */
|
|
{ .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */
|
|
{ .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */
|
|
{ .id = "ESS0001", .driver_data = 0 }, /* ES1869 */
|
|
{ .id = "ESS0005", .driver_data = 0 }, /* ES1878 */
|
|
{ .id = "ESS6880", .driver_data = 0 }, /* ES688 */
|
|
{ .id = "IBM0012", .driver_data = 0 }, /* CS4232 */
|
|
{ .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */
|
|
{ .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */
|
|
{ .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */
|
|
{ .id = "PNPb02f", .driver_data = 0 }, /* Generic */
|
|
{ .id = "", },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, pnp_devids);
|
|
|
|
static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did)
|
|
{
|
|
int ioport, iolen;
|
|
struct ns558 *ns558;
|
|
struct gameport *port;
|
|
|
|
if (!pnp_port_valid(dev, 0)) {
|
|
printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ioport = pnp_port_start(dev, 0);
|
|
iolen = pnp_port_len(dev, 0);
|
|
|
|
if (!request_region(ioport, iolen, "ns558-pnp"))
|
|
return -EBUSY;
|
|
|
|
ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
|
|
port = gameport_allocate_port();
|
|
if (!ns558 || !port) {
|
|
printk(KERN_ERR "ns558: Memory allocation failed\n");
|
|
kfree(ns558);
|
|
gameport_free_port(port);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ns558->io = ioport;
|
|
ns558->size = iolen;
|
|
ns558->dev = dev;
|
|
ns558->gameport = port;
|
|
|
|
gameport_set_name(port, "NS558 PnP Gameport");
|
|
gameport_set_phys(port, "pnp%s/gameport0", dev->dev.bus_id);
|
|
port->dev.parent = &dev->dev;
|
|
port->io = ioport;
|
|
|
|
gameport_register_port(port);
|
|
|
|
list_add_tail(&ns558->node, &ns558_list);
|
|
return 0;
|
|
}
|
|
|
|
static struct pnp_driver ns558_pnp_driver = {
|
|
.name = "ns558",
|
|
.id_table = pnp_devids,
|
|
.probe = ns558_pnp_probe,
|
|
};
|
|
|
|
#else
|
|
|
|
static struct pnp_driver ns558_pnp_driver;
|
|
|
|
#endif
|
|
|
|
static int __init ns558_init(void)
|
|
{
|
|
int i = 0;
|
|
int error;
|
|
|
|
error = pnp_register_driver(&ns558_pnp_driver);
|
|
if (error && error != -ENODEV) /* should be ENOSYS really */
|
|
return error;
|
|
|
|
/*
|
|
* Probe ISA ports after PnP, so that PnP ports that are already
|
|
* enabled get detected as PnP. This may be suboptimal in multi-device
|
|
* configurations, but saves hassle with simple setups.
|
|
*/
|
|
|
|
while (ns558_isa_portlist[i])
|
|
ns558_isa_probe(ns558_isa_portlist[i++]);
|
|
|
|
return list_empty(&ns558_list) && error ? -ENODEV : 0;
|
|
}
|
|
|
|
static void __exit ns558_exit(void)
|
|
{
|
|
struct ns558 *ns558, *safe;
|
|
|
|
list_for_each_entry_safe(ns558, safe, &ns558_list, node) {
|
|
gameport_unregister_port(ns558->gameport);
|
|
release_region(ns558->io & ~(ns558->size - 1), ns558->size);
|
|
kfree(ns558);
|
|
}
|
|
|
|
pnp_unregister_driver(&ns558_pnp_driver);
|
|
}
|
|
|
|
module_init(ns558_init);
|
|
module_exit(ns558_exit);
|