isapnp_test.c

/*
 *  ISA Plug & Play support
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   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
 *
 */

#include <linux/config.h>
#include <linux/version.h>

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 2, 0)
#error "This driver is designed only for Linux 2.2.0 and higher."
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 3, 11)
#define NEW_RESOURCE
#endif

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#ifndef ALSA_BUILD
#include <linux/isapnp.h>
#else
#include "isapnp.h"
#endif

#define USER_PORT_AUTO_VALUE  (~0)

static int user_port = USER_PORT_AUTO_VALUE;
MODULE_PARM(user_port, "i");

static struct isapnp_dev *dev = NULL;

int init_module(void)
{
      /* find the first game port, use standard PnP IDs */
      dev = isapnp_find_dev(NULL,
                        ISAPNP_VENDOR('P','N','P'),
                        ISAPNP_FUNCTION(0xb02f),
                        NULL);
      printk("dev = 0x%lx\n", (long)dev);
      if (!dev)
            return -ENODEV;
      if (dev->prepare(dev)<0)
            return -EAGAIN;
      if (!dev->ro) {
            /* override resource */
            if (user_port != USER_PORT_AUTO_VALUE)
                  dev->resource[0].start = user_port;
      }
      if (dev->activate(dev)<0) {
            printk("isapnp configure failed (out of resources?)\n");
            return -ENOMEM;
      }
      user_port = dev->resource[0].start;       /* get real port */
      return 0;
}

void cleanup_module(void)
{
      if (dev)
            dev->deactivate(dev);
}