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fm801-gp.c

/*
 *  FM801 gameport driver for Linux
 *
 *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *
 *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/gameport.h>

#define PCI_VENDOR_ID_FORTEMEDIA    0x1319
#define PCI_DEVICE_ID_FM801_GP      0x0802

#define HAVE_COOKED

struct fm801_gp {
      struct gameport *gameport;
      struct resource *res_port;
};

#ifdef HAVE_COOKED
static int fm801_gp_cooked_read(struct gameport *gameport, int *axes, int *buttons)
{
      unsigned short w;

      w = inw(gameport->io + 2);
      *buttons = (~w >> 14) & 0x03;
      axes[0] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
      w = inw(gameport->io + 4);
      axes[1] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
      w = inw(gameport->io + 6);
      *buttons |= ((~w >> 14) & 0x03) << 2;
      axes[2] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
      w = inw(gameport->io + 8);
      axes[3] = (w == 0xffff) ? -1 : ((w & 0x1fff) << 5);
      outw(0xff, gameport->io); /* reset */

        return 0;
}
#endif

static int fm801_gp_open(struct gameport *gameport, int mode)
{
      switch (mode) {
#ifdef HAVE_COOKED
      case GAMEPORT_MODE_COOKED:
            return 0;
#endif
      case GAMEPORT_MODE_RAW:
            return 0;
      default:
            return -1;
      }

      return 0;
}

static int __devinit fm801_gp_probe(struct pci_dev *pci, const struct pci_device_id *id)
{
      struct fm801_gp *gp;
      struct gameport *port;
      int error;

      gp = kzalloc(sizeof(struct fm801_gp), GFP_KERNEL);
      port = gameport_allocate_port();
      if (!gp || !port) {
            printk(KERN_ERR "fm801-gp: Memory allocation failed\n");
            error = -ENOMEM;
            goto err_out_free;
      }

      error = pci_enable_device(pci);
      if (error)
            goto err_out_free;

      port->open = fm801_gp_open;
#ifdef HAVE_COOKED
      port->cooked_read = fm801_gp_cooked_read;
#endif
      gameport_set_name(port, "FM801");
      gameport_set_phys(port, "pci%s/gameport0", pci_name(pci));
      port->dev.parent = &pci->dev;
      port->io = pci_resource_start(pci, 0);

      gp->gameport = port;
      gp->res_port = request_region(port->io, 0x10, "FM801 GP");
      if (!gp->res_port) {
            printk(KERN_DEBUG "fm801-gp: unable to grab region 0x%x-0x%x\n",
                  port->io, port->io + 0x0f);
            error = -EBUSY;
            goto err_out_disable_dev;
      }

      pci_set_drvdata(pci, gp);

      outb(0x60, port->io + 0x0d); /* enable joystick 1 and 2 */
      gameport_register_port(port);

      return 0;

 err_out_disable_dev:
      pci_disable_device(pci);
 err_out_free:
      gameport_free_port(port);
      kfree(gp);
      return error;
}

static void __devexit fm801_gp_remove(struct pci_dev *pci)
{
      struct fm801_gp *gp = pci_get_drvdata(pci);

      if (gp) {
            gameport_unregister_port(gp->gameport);
            release_resource(gp->res_port);
            kfree(gp);
      }
}

static struct pci_device_id fm801_gp_id_table[] = {
      { PCI_VENDOR_ID_FORTEMEDIA, PCI_DEVICE_ID_FM801_GP, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0  },
      { 0 }
};

static struct pci_driver fm801_gp_driver = {
      .name =           "FM801_gameport",
      .id_table = fm801_gp_id_table,
      .probe =    fm801_gp_probe,
      .remove =   __devexit_p(fm801_gp_remove),
};

static int __init fm801_gp_init(void)
{
      return pci_register_driver(&fm801_gp_driver);
}

static void __exit fm801_gp_exit(void)
{
      pci_unregister_driver(&fm801_gp_driver);
}

module_init(fm801_gp_init);
module_exit(fm801_gp_exit);

MODULE_DEVICE_TABLE(pci, fm801_gp_id_table);

MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_LICENSE("GPL");

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