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 :)) */
  25 static 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
  31 static const struct ide_port_info ide_pnp_port_info = {
  32         .host_flags             = IDE_HFLAG_NO_DMA,
  33         .chipset                = ide_generic,
  34 };
  35
  36 static 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;
  75 out:
  76         release_region(ctl, 1);
  77         release_region(base, 8);
  78
  79         return rc;
  80 }
  81
  82 static 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
  92 static struct pnp_driver idepnp_driver = {
  93         .name           = "ide",
  94         .id_table       = idepnp_devices,
  95         .probe          = idepnp_probe,
  96         .remove         = idepnp_remove,
  97 };
  98
  99 module_pnp_driver(idepnp_driver);
 100 MODULE_LICENSE("GPL");