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 const struct ide_port_info ide_pnp_port_info = {
  31         .host_flags             = IDE_HFLAG_NO_DMA,
  32 };
  33
  34 static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
  35 {
  36         struct ide_host *host;
  37         unsigned long base, ctl;
  38         int rc;
  39         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
  40
  41         printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
  42
  43         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  44                 return -1;
  45
  46         base = pnp_port_start(dev, 0);
  47         ctl = pnp_port_start(dev, 1);
  48
  49         if (!request_region(base, 8, DRV_NAME)) {
  50                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  51                                 DRV_NAME, base, base + 7);
  52                 return -EBUSY;
  53         }
  54
  55         if (!request_region(ctl, 1, DRV_NAME)) {
  56                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  57                                 DRV_NAME, ctl);
  58                 release_region(base, 8);
  59                 return -EBUSY;
  60         }
  61
  62         memset(&hw, 0, sizeof(hw));
  63         ide_std_init_ports(&hw, base, ctl);
  64         hw.irq = pnp_irq(dev, 0);
  65         hw.chipset = ide_generic;
  66
  67         rc = ide_host_add(&ide_pnp_port_info, hws, &host);
  68         if (rc)
  69                 goto out;
  70
  71         pnp_set_drvdata(dev, host);
  72
  73         return 0;
  74 out:
  75         release_region(ctl, 1);
  76         release_region(base, 8);
  77
  78         return rc;
  79 }
  80
  81 static void idepnp_remove(struct pnp_dev *dev)
  82 {
  83         struct ide_host *host = pnp_get_drvdata(dev);
  84
  85         ide_host_remove(host);
  86
  87         release_region(pnp_port_start(dev, 1), 1);
  88         release_region(pnp_port_start(dev, 0), 8);
  89 }
  90
  91 static struct pnp_driver idepnp_driver = {
  92         .name           = "ide",
  93         .id_table       = idepnp_devices,
  94         .probe          = idepnp_probe,
  95         .remove         = idepnp_remove,
  96 };
  97
  98 static int __init pnpide_init(void)
  99 {
 100         return pnp_register_driver(&idepnp_driver);
 101 }
 102
 103 static void __exit pnpide_exit(void)
 104 {
 105         pnp_unregister_driver(&idepnp_driver);
 106 }
 107
 108 module_init(pnpide_init);
 109 module_exit(pnpide_exit);
 110
 111 MODULE_LICENSE("GPL");