LXR linux/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 :)) */
  24static 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
  30static const struct ide_port_info ide_pnp_port_info = {
  31        .host_flags             = IDE_HFLAG_NO_DMA,
  32        .chipset                = ide_generic,
  33};
  34
  35static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
  36{
  37        struct ide_host *host;
  38        unsigned long base, ctl;
  39        int rc;
  40        struct ide_hw hw, *hws[] = { &hw };
  41
  42        printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
  43
  44        if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  45                return -1;
  46
  47        base = pnp_port_start(dev, 0);
  48        ctl = pnp_port_start(dev, 1);
  49
  50        if (!request_region(base, 8, DRV_NAME)) {
  51                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  52                                DRV_NAME, base, base + 7);
  53                return -EBUSY;
  54        }
  55
  56        if (!request_region(ctl, 1, DRV_NAME)) {
  57                printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  58                                DRV_NAME, ctl);
  59                release_region(base, 8);
  60                return -EBUSY;
  61        }
  62
  63        memset(&hw, 0, sizeof(hw));
  64        ide_std_init_ports(&hw, base, ctl);
  65        hw.irq = pnp_irq(dev, 0);
  66
  67        rc = ide_host_add(&ide_pnp_port_info, hws, 1, &host);
  68        if (rc)
  69                goto out;
  70
  71        pnp_set_drvdata(dev, host);
  72
  73        return 0;
  74out:
  75        release_region(ctl, 1);
  76        release_region(base, 8);
  77
  78        return rc;
  79}
  80
  81static 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
  91static struct pnp_driver idepnp_driver = {
  92        .name           = "ide",
  93        .id_table       = idepnp_devices,
  94        .probe          = idepnp_probe,
  95        .remove         = idepnp_remove,
  96};
  97
  98static int __init pnpide_init(void)
  99{
 100        return pnp_register_driver(&idepnp_driver);
 101}
 102
 103static void __exit pnpide_exit(void)
 104{
 105        pnp_unregister_driver(&idepnp_driver);
 106}
 107
 108module_init(pnpide_init);
 109module_exit(pnpide_exit);
 110
 111MODULE_LICENSE("GPL");
 112