LXR linux/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 :)) */
  17static 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
  23static const struct ide_port_info ide_pnp_port_info = {
  24        .host_flags             = IDE_HFLAG_NO_DMA,
  25        .chipset                = ide_generic,
  26};
  27
  28static 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;
  67out:
  68        release_region(ctl, 1);
  69        release_region(base, 8);
  70
  71        return rc;
  72}
  73
  74static 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
  84static struct pnp_driver idepnp_driver = {
  85        .name           = "ide",
  86        .id_table       = idepnp_devices,
  87        .probe          = idepnp_probe,
  88        .remove         = idepnp_remove,
  89};
  90
  91module_pnp_driver(idepnp_driver);
  92MODULE_LICENSE("GPL");
  93