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 /* Add your devices here :)) */
  22 static struct pnp_device_id idepnp_devices[] = {
  23         /* Generic ESDI/IDE/ATA compatible hard disk controller */
  24         {.id = "PNP0600", .driver_data = 0},
  25         {.id = ""}
  26 };
  27
  28 static int idepnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
  29 {
  30         hw_regs_t hw;
  31         ide_hwif_t *hwif;
  32
  33         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  34                 return -1;
  35
  36         memset(&hw, 0, sizeof(hw));
  37         ide_std_init_ports(&hw, pnp_port_start(dev, 0),
  38                                 pnp_port_start(dev, 1));
  39         hw.irq = pnp_irq(dev, 0);
  40
  41         hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
  42         if (hwif) {
  43                 u8 index = hwif->index;
  44                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
  45
  46                 ide_init_port_data(hwif, index);
  47                 ide_init_port_hw(hwif, &hw);
  48
  49                 printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
  50                 pnp_set_drvdata(dev,hwif);
  51
  52                 ide_device_add(idx);
  53
  54                 return 0;
  55         }
  56
  57         return -1;
  58 }
  59
  60 static void idepnp_remove(struct pnp_dev * dev)
  61 {
  62         ide_hwif_t *hwif = pnp_get_drvdata(dev);
  63         if (hwif) {
  64                 ide_unregister(hwif->index);
  65         } else
  66                 printk(KERN_ERR "idepnp: Unable to remove device, please report.\n");
  67 }
  68
  69 static struct pnp_driver idepnp_driver = {
  70         .name           = "ide",
  71         .id_table       = idepnp_devices,
  72         .probe          = idepnp_probe,
  73         .remove         = idepnp_remove,
  74 };
  75
  76 static int __init pnpide_init(void)
  77 {
  78         return pnp_register_driver(&idepnp_driver);
  79 }
  80
  81 static void __exit pnpide_exit(void)
  82 {
  83         pnp_unregister_driver(&idepnp_driver);
  84 }
  85
  86 module_init(pnpide_init);
  87 module_exit(pnpide_exit);