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");