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/*
* $Id: ns558.c,v 1.29 2001/04/24 07:48:56 vojtech Exp $
*
* Copyright (c) 1999-2001 Vojtech Pavlik
* Copyright (c) 1999 Brian Gerst
*
* Sponsored by SuSE
*/
/*
* 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, Ucitelska 1576, Prague 8, 182 00 Czech Republic
*/
#include <asm/io.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/gameport.h>
#include <linux/slab.h>
#include <linux/isapnp.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_LICENSE("GPL");
#define NS558_ISA 1
#define NS558_PNP 2
static int ns558_isa_portlist[] = { 0x200, 0x201, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
struct ns558 {
int type;
int size;
struct pci_dev *dev;
struct ns558 *next;
struct gameport gameport;
};
static struct ns558 *ns558;
/*
* 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 struct ns558* ns558_isa_probe(int io, struct ns558 *next)
{
int i, j, b;
unsigned char c, u, v;
struct ns558 *port;
/*
* No one should be using this address.
*/
if (check_region(io, 1))
return next;
/*
* 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);
return next;
}
/*
* 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);
return next;
}
wait_ms(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);
return next;
}
/*
* And now find the number of mirrors of the port.
*/
for (i = 1; i < 5; i++) {
if (check_region(io & (-1 << i), (1 << i))) /* Don't disturb anyone */
break;
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++;
wait_ms(3);
if (b > 300) /* We allow 30% difference */
break;
}
i--;
if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
printk(KERN_ERR "ns558: Memory allocation failed.\n");
return next;
}
memset(port, 0, sizeof(struct ns558));
port->next = next;
port->type = NS558_ISA;
port->size = (1 << i);
port->gameport.io = io & (-1 << i);
request_region(port->gameport.io, (1 << i), "ns558-isa");
gameport_register_port(&port->gameport);
printk(KERN_INFO "gameport%d: NS558 ISA at %#x", port->gameport.number, port->gameport.io);
if (port->size > 1) printk(" size %d", port->size);
printk(" speed %d kHz\n", port->gameport.speed);
return port;
}
#if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
#define NSS558_ISAPNP
#endif
#ifdef NSS558_ISAPNP
static struct isapnp_device_id pnp_devids[] = {
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('@','P','@'), ISAPNP_DEVICE(0x0001), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('@','P','@'), ISAPNP_DEVICE(0x2001), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x7001), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x7002), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0010), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0110), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0b35), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0010), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0110), 0 },
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('P','N','P'), ISAPNP_DEVICE(0xb02f), 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(isapnp, pnp_devids);
static struct ns558* ns558_pnp_probe(struct pci_dev *dev, struct ns558 *next)
{
int ioport, iolen;
struct ns558 *port;
if (dev->prepare && dev->prepare(dev) < 0)
return next;
if (!(dev->resource[0].flags & IORESOURCE_IO)) {
printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
return next;
}
if (dev->activate && dev->activate(dev) < 0) {
printk(KERN_ERR "ns558: PnP resource allocation failed\n");
return next;
}
ioport = pci_resource_start(dev, 0);
iolen = pci_resource_len(dev, 0);
if (!request_region(ioport, iolen, "ns558-pnp"))
goto deactivate;
if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
printk(KERN_ERR "ns558: Memory allocation failed.\n");
goto deactivate;
}
memset(port, 0, sizeof(struct ns558));
port->next = next;
port->type = NS558_PNP;
port->gameport.io = ioport;
port->size = iolen;
port->dev = dev;
gameport_register_port(&port->gameport);
printk(KERN_INFO "gameport%d: NS558 PnP at %#x", port->gameport.number, port->gameport.io);
if (iolen > 1) printk(" size %d", iolen);
printk(" speed %d kHz\n", port->gameport.speed);
return port;
deactivate:
if (dev->deactivate)
dev->deactivate(dev);
return next;
}
#endif
int __init ns558_init(void)
{
int i = 0;
#ifdef NSS558_ISAPNP
struct isapnp_device_id *devid;
struct pci_dev *dev = NULL;
#endif
/*
* Probe for ISA ports.
*/
while (ns558_isa_portlist[i])
ns558 = ns558_isa_probe(ns558_isa_portlist[i++], ns558);
/*
* Probe for PnP ports.
*/
#ifdef NSS558_ISAPNP
for (devid = pnp_devids; devid->vendor; devid++) {
while ((dev = isapnp_find_dev(NULL, devid->vendor, devid->function, dev))) {
ns558 = ns558_pnp_probe(dev, ns558);
}
}
#endif
return ns558 ? 0 : -ENODEV;
}
void __exit ns558_exit(void)
{
struct ns558 *next, *port = ns558;
while (port) {
gameport_unregister_port(&port->gameport);
switch (port->type) {
#ifdef NSS558_ISAPNP
case NS558_PNP:
if (port->dev->deactivate)
port->dev->deactivate(port->dev);
/* fall through */
#endif
case NS558_ISA:
release_region(port->gameport.io, port->size);
break;
default:
break;
}
next = port->next;
kfree(port);
port = next;
}
}
module_init(ns558_init);
module_exit(ns558_exit);
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