ide-pnp.c revision dca3983059a4481e4ae97bbf0ac4b4c21429e1a5 
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 :)) */
24static 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
30static const struct ide_port_info ide_pnp_port_info = {
31	.host_flags		= IDE_HFLAG_NO_DMA,
32	.chipset		= ide_generic,
33};
34
35static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
36{
37	struct ide_host *host;
38	unsigned long base, ctl;
39	int rc;
40	hw_regs_t hw, *hws[] = { &hw };
41
42	printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
43
44	if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
45		return -1;
46
47	base = pnp_port_start(dev, 0);
48	ctl = pnp_port_start(dev, 1);
49
50	if (!request_region(base, 8, DRV_NAME)) {
51		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
52				DRV_NAME, base, base + 7);
53		return -EBUSY;
54	}
55
56	if (!request_region(ctl, 1, DRV_NAME)) {
57		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
58				DRV_NAME, ctl);
59		release_region(base, 8);
60		return -EBUSY;
61	}
62
63	memset(&hw, 0, sizeof(hw));
64	ide_std_init_ports(&hw, base, ctl);
65	hw.irq = pnp_irq(dev, 0);
66
67	rc = ide_host_add(&ide_pnp_port_info, hws, 1, &host);
68	if (rc)
69		goto out;
70
71	pnp_set_drvdata(dev, host);
72
73	return 0;
74out:
75	release_region(ctl, 1);
76	release_region(base, 8);
77
78	return rc;
79}
80
81static void idepnp_remove(struct pnp_dev *dev)
82{
83	struct ide_host *host = pnp_get_drvdata(dev);
84
85	ide_host_remove(host);
86
87	release_region(pnp_port_start(dev, 1), 1);
88	release_region(pnp_port_start(dev, 0), 8);
89}
90
91static struct pnp_driver idepnp_driver = {
92	.name		= "ide",
93	.id_table	= idepnp_devices,
94	.probe		= idepnp_probe,
95	.remove		= idepnp_remove,
96};
97
98static int __init pnpide_init(void)
99{
100	return pnp_register_driver(&idepnp_driver);
101}
102
103static void __exit pnpide_exit(void)
104{
105	pnp_unregister_driver(&idepnp_driver);
106}
107
108module_init(pnpide_init);
109module_exit(pnpide_exit);
110
111MODULE_LICENSE("GPL");
112