Subversion Repositories or1k

/*

 * $Id: ns558.c,v 1.1.1.1 2004-04-15 02:03:26 phoenix 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);