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 :)) */
  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         unsigned long base, ctl;
  35
  36         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  37                 return -1;
  38
  39         base = pnp_port_start(dev, 0);
  40         ctl = pnp_port_start(dev, 1);
  41
  42         if (!request_region(base, 8, DRV_NAME)) {
  43                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  44                                 DRV_NAME, base, base + 7);
  45                 return -EBUSY;
  46         }
  47
  48         if (!request_region(ctl, 1, DRV_NAME)) {
  49                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  50                                 DRV_NAME, ctl);
  51                 release_region(base, 8);
  52                 return -EBUSY;
  53         }
  54
  55         memset(&hw, 0, sizeof(hw));
  56         ide_std_init_ports(&hw, base, ctl);
  57         hw.irq = pnp_irq(dev, 0);
  58         hw.chipset = ide_generic;
  59
  60         hwif = ide_find_port();
  61         if (hwif) {
  62                 u8 index = hwif->index;
  63                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
  64
  65                 ide_init_port_data(hwif, index);
  66                 ide_init_port_hw(hwif, &hw);
  67
  68                 printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
  69                 pnp_set_drvdata(dev, hwif);
  70
  71                 ide_device_add(idx, NULL);
  72
  73                 return 0;
  74         }
  75
  76         release_region(ctl, 1);
  77         release_region(base, 8);
  78
  79         return -1;
  80 }
  81
  82 static void idepnp_remove(struct pnp_dev *dev)
  83 {
  84         ide_hwif_t *hwif = pnp_get_drvdata(dev);
  85
  86         ide_unregister(hwif);
  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 static int __init pnpide_init(void)
 100 {
 101         return pnp_register_driver(&idepnp_driver);
 102 }
 103
 104 static void __exit pnpide_exit(void)
 105 {
 106         pnp_unregister_driver(&idepnp_driver);
 107 }
 108
 109 module_init(pnpide_init);
 110 module_exit(pnpide_exit);
 111
 112 MODULE_LICENSE("GPL");