drivers/ide/ide-pnp.c

   1 /*
   2  * This file provides autodetection for ISA PnP IDE interfaces.
   3  * It was tested with "ESS ES1868 Plug and Play AudioDrive" IDE interface.
   4  *
   5  * Copyright (C) 2000 Andrey Panin <pazke@donpac.ru>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * (for example /usr/src/linux/COPYING); if not, write to the Free
  14  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/pnp.h>
  19 #include <linux/ide.h>
  20
  21 #define DRV_NAME "ide-pnp"
  22
  23 /* Add your devices here :)) */
  24 static struct pnp_device_id idepnp_devices[] = {
  25         /* Generic ESDI/IDE/ATA compatible hard disk controller */
  26         {.id = "PNP0600", .driver_data = 0},
  27         {.id = ""}
  28 };
  29
  30 static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
  31 {
  32         struct ide_host *host;
  33         unsigned long base, ctl;
  34         int rc;
  35         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
  36
  37         printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
  38
  39         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  40                 return -1;
  41
  42         base = pnp_port_start(dev, 0);
  43         ctl = pnp_port_start(dev, 1);
  44
  45         if (!request_region(base, 8, DRV_NAME)) {
  46                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  47                                 DRV_NAME, base, base + 7);
  48                 return -EBUSY;
  49         }
  50
  51         if (!request_region(ctl, 1, DRV_NAME)) {
  52                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  53                                 DRV_NAME, ctl);
  54                 release_region(base, 8);
  55                 return -EBUSY;
  56         }
  57
  58         memset(&hw, 0, sizeof(hw));
  59         ide_std_init_ports(&hw, base, ctl);
  60         hw.irq = pnp_irq(dev, 0);
  61         hw.chipset = ide_generic;
  62
  63         rc = ide_host_add(NULL, hws, &host);
  64         if (rc)
  65                 goto out;
  66
  67         pnp_set_drvdata(dev, host);
  68
  69         return 0;
  70 out:
  71         release_region(ctl, 1);
  72         release_region(base, 8);
  73
  74         return rc;
  75 }
  76
  77 static void idepnp_remove(struct pnp_dev *dev)
  78 {
  79         struct ide_host *host = pnp_get_drvdata(dev);
  80
  81         ide_host_remove(host);
  82
  83         release_region(pnp_port_start(dev, 1), 1);
  84         release_region(pnp_port_start(dev, 0), 8);
  85 }
  86
  87 static struct pnp_driver idepnp_driver = {
  88         .name           = "ide",
  89         .id_table       = idepnp_devices,
  90         .probe          = idepnp_probe,
  91         .remove         = idepnp_remove,
  92 };
  93
  94 static int __init pnpide_init(void)
  95 {
  96         return pnp_register_driver(&idepnp_driver);
  97 }
  98
  99 static void __exit pnpide_exit(void)
 100 {
 101         pnp_unregister_driver(&idepnp_driver);
 102 }
 103
 104 module_init(pnpide_init);
 105 module_exit(pnpide_exit);
 106
 107 MODULE_LICENSE("GPL");