drivers/ide/ide-pnp.c

   1 /*
   2  * linux/drivers/ide/ide-pnp.c
   3  *
   4  * This file provides autodetection for ISA PnP IDE interfaces.
   5  * It was tested with "ESS ES1868 Plug and Play AudioDrive" IDE interface.
   6  *
   7  * Copyright (C) 2000 Andrey Panin <pazke@donpac.ru>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2, or (at your option)
  12  * any later version.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * (for example /usr/src/linux/COPYING); if not, write to the Free
  16  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/pnp.h>
  21 #include <linux/ide.h>
  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         hw_regs_t hw;
  33         ide_hwif_t *hwif;
  34
  35         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  36                 return -1;
  37
  38         memset(&hw, 0, sizeof(hw));
  39         ide_std_init_ports(&hw, pnp_port_start(dev, 0),
  40                                 pnp_port_start(dev, 1));
  41         hw.irq = pnp_irq(dev, 0);
  42
  43         hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
  44         if (hwif) {
  45                 u8 index = hwif->index;
  46                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
  47
  48                 ide_init_port_data(hwif, index);
  49                 ide_init_port_hw(hwif, &hw);
  50
  51                 printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
  52                 pnp_set_drvdata(dev,hwif);
  53
  54                 ide_device_add(idx);
  55
  56                 return 0;
  57         }
  58
  59         return -1;
  60 }
  61
  62 static void idepnp_remove(struct pnp_dev * dev)
  63 {
  64         ide_hwif_t *hwif = pnp_get_drvdata(dev);
  65         if (hwif) {
  66                 ide_unregister(hwif->index);
  67         } else
  68                 printk(KERN_ERR "idepnp: Unable to remove device, please report.\n");
  69 }
  70
  71 static struct pnp_driver idepnp_driver = {
  72         .name           = "ide",
  73         .id_table       = idepnp_devices,
  74         .probe          = idepnp_probe,
  75         .remove         = idepnp_remove,
  76 };
  77
  78 static int __init pnpide_init(void)
  79 {
  80         return pnp_register_driver(&idepnp_driver);
  81 }
  82
  83 static void __exit pnpide_exit(void)
  84 {
  85         pnp_unregister_driver(&idepnp_driver);
  86 }
  87
  88 module_init(pnpide_init);
  89 module_exit(pnpide_exit);