drivers/ide/ide-pnp.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * This file provides autodetection for ISA PnP IDE interfaces.
   4  * It was tested with "ESS ES1868 Plug and Play AudioDrive" IDE interface.
   5  *
   6  * Copyright (C) 2000 Andrey Panin <pazke@donpac.ru>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/pnp.h>
  11 #include <linux/ide.h>
  12 #include <linux/module.h>
  13
  14 #define DRV_NAME "ide-pnp"
  15
  16 /* Add your devices here :)) */
  17 static const struct pnp_device_id idepnp_devices[] = {
  18         /* Generic ESDI/IDE/ATA compatible hard disk controller */
  19         {.id = "PNP0600", .driver_data = 0},
  20         {.id = ""}
  21 };
  22
  23 static const struct ide_port_info ide_pnp_port_info = {
  24         .host_flags             = IDE_HFLAG_NO_DMA,
  25         .chipset                = ide_generic,
  26 };
  27
  28 static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
  29 {
  30         struct ide_host *host;
  31         unsigned long base, ctl;
  32         int rc;
  33         struct ide_hw hw, *hws[] = { &hw };
  34
  35         printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
  36
  37         if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
  38                 return -1;
  39
  40         base = pnp_port_start(dev, 0);
  41         ctl = pnp_port_start(dev, 1);
  42
  43         if (!request_region(base, 8, DRV_NAME)) {
  44                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  45                                 DRV_NAME, base, base + 7);
  46                 return -EBUSY;
  47         }
  48
  49         if (!request_region(ctl, 1, DRV_NAME)) {
  50                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  51                                 DRV_NAME, ctl);
  52                 release_region(base, 8);
  53                 return -EBUSY;
  54         }
  55
  56         memset(&hw, 0, sizeof(hw));
  57         ide_std_init_ports(&hw, base, ctl);
  58         hw.irq = pnp_irq(dev, 0);
  59
  60         rc = ide_host_add(&ide_pnp_port_info, hws, 1, &host);
  61         if (rc)
  62                 goto out;
  63
  64         pnp_set_drvdata(dev, host);
  65
  66         return 0;
  67 out:
  68         release_region(ctl, 1);
  69         release_region(base, 8);
  70
  71         return rc;
  72 }
  73
  74 static void idepnp_remove(struct pnp_dev *dev)
  75 {
  76         struct ide_host *host = pnp_get_drvdata(dev);
  77
  78         ide_host_remove(host);
  79
  80         release_region(pnp_port_start(dev, 1), 1);
  81         release_region(pnp_port_start(dev, 0), 8);
  82 }
  83
  84 static struct pnp_driver idepnp_driver = {
  85         .name           = "ide",
  86         .id_table       = idepnp_devices,
  87         .probe          = idepnp_probe,
  88         .remove         = idepnp_remove,
  89 };
  90
  91 module_pnp_driver(idepnp_driver);
  92 MODULE_LICENSE("GPL");