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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 :)) */
 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 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");
113 

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