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#include <linux/module.h>
  21
  22#define DRV_NAME "ide-pnp"
  23
  24/* Add your devices here :)) */
  25static struct pnp_device_id idepnp_devices[] = {
  26        /* Generic ESDI/IDE/ATA compatible hard disk controller */
  27        {.id = "PNP0600", .driver_data = 0},
  28        {.id = ""}
  29};
  30
  31static const struct ide_port_info ide_pnp_port_info = {
  32        .host_flags             = IDE_HFLAG_NO_DMA,
  33        .chipset                = ide_generic,
  34};
  35
  36static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
  37{
  38        struct ide_host *host;
  39        unsigned long base, ctl;
  40        int rc;
  41        struct ide_hw hw, *hws[] = { &hw };
  42
  43        printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
  44
  45        if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  46                return -1;
  47
  48        base = pnp_port_start(dev, 0);
  49        ctl = pnp_port_start(dev, 1);
  50
  51        if (!request_region(base, 8, DRV_NAME)) {
  52                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  53                                DRV_NAME, base, base + 7);
  54                return -EBUSY;
  55        }
  56
  57        if (!request_region(ctl, 1, DRV_NAME)) {
  58                printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  59                                DRV_NAME, ctl);
  60                release_region(base, 8);
  61                return -EBUSY;
  62        }
  63
  64        memset(&hw, 0, sizeof(hw));
  65        ide_std_init_ports(&hw, base, ctl);
  66        hw.irq = pnp_irq(dev, 0);
  67
  68        rc = ide_host_add(&ide_pnp_port_info, hws, 1, &host);
  69        if (rc)
  70                goto out;
  71
  72        pnp_set_drvdata(dev, host);
  73
  74        return 0;
  75out:
  76        release_region(ctl, 1);
  77        release_region(base, 8);
  78
  79        return rc;
  80}
  81
  82static void idepnp_remove(struct pnp_dev *dev)
  83{
  84        struct ide_host *host = pnp_get_drvdata(dev);
  85
  86        ide_host_remove(host);
  87
  88        release_region(pnp_port_start(dev, 1), 1);
  89        release_region(pnp_port_start(dev, 0), 8);
  90}
  91
  92static struct pnp_driver idepnp_driver = {
  93        .name           = "ide",
  94        .id_table       = idepnp_devices,
  95        .probe          = idepnp_probe,
  96        .remove         = idepnp_remove,
  97};
  98
  99static int __init pnpide_init(void)
 100{
 101        return pnp_register_driver(&idepnp_driver);
 102}
 103
 104static void __exit pnpide_exit(void)
 105{
 106        pnp_unregister_driver(&idepnp_driver);
 107}
 108
 109module_init(pnpide_init);
 110module_exit(pnpide_exit);
 111
 112MODULE_LICENSE("GPL");
 113