// SPDX-License-Identifier: GPL-2.0-or-later

  /*

   * This file provides autodetection for ISA PnP IDE interfaces.
   * It was tested with "ESS ES1868 Plug and Play AudioDrive" IDE interface.
   *
   * Copyright (C) 2000 Andrey Panin <pazke@donpac.ru>

   */
  
  #include <linux/init.h>
  #include <linux/pnp.h>
  #include <linux/ide.h>

  #include <linux/module.h>

  #define DRV_NAME "ide-pnp"

  /* Add your devices here :)) */

  static const struct pnp_device_id idepnp_devices[] = {

  	/* Generic ESDI/IDE/ATA compatible hard disk controller */

  	{.id = "PNP0600", .driver_data = 0},
  	{.id = ""}
  };

  static const struct ide_port_info ide_pnp_port_info = {
  	.host_flags		= IDE_HFLAG_NO_DMA,

  	.chipset		= ide_generic,

  };

  static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)

  {

  	struct ide_host *host;

  	unsigned long base, ctl;

  	int rc;

  	struct ide_hw hw, *hws[] = { &hw };

  	printk(KERN_INFO DRV_NAME ": generic PnP IDE interface
  ");

  	if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  		return -1;

  	base = pnp_port_start(dev, 0);
  	ctl = pnp_port_start(dev, 1);
  
  	if (!request_region(base, 8, DRV_NAME)) {
  		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.
  ",
  				DRV_NAME, base, base + 7);
  		return -EBUSY;
  	}
  
  	if (!request_region(ctl, 1, DRV_NAME)) {
  		printk(KERN_ERR "%s: I/O resource 0x%lX not free.
  ",
  				DRV_NAME, ctl);
  		release_region(base, 8);
  		return -EBUSY;
  	}

  	memset(&hw, 0, sizeof(hw));

  	ide_std_init_ports(&hw, base, ctl);

  	hw.irq = pnp_irq(dev, 0);

  	rc = ide_host_add(&ide_pnp_port_info, hws, 1, &host);

  	if (rc)
  		goto out;

  	pnp_set_drvdata(dev, host);

  	return 0;
  out:

  	release_region(ctl, 1);
  	release_region(base, 8);

  	return rc;

  }

  static void idepnp_remove(struct pnp_dev *dev)

  {

  	struct ide_host *host = pnp_get_drvdata(dev);

  	ide_host_remove(host);

  
  	release_region(pnp_port_start(dev, 1), 1);
  	release_region(pnp_port_start(dev, 0), 8);

  }
  
  static struct pnp_driver idepnp_driver = {
  	.name		= "ide",
  	.id_table	= idepnp_devices,
  	.probe		= idepnp_probe,
  	.remove		= idepnp_remove,
  };

  module_pnp_driver(idepnp_driver);

  MODULE_LICENSE("GPL");