ide-pnp.c revision 3dd89a9b2af37d8e3efd785e20b12b785e50e48f 
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 int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
31{
32	hw_regs_t hw;
33	ide_hwif_t *hwif;
34	unsigned long base, ctl;
35
36	if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
37		return -1;
38
39	base = pnp_port_start(dev, 0);
40	ctl = pnp_port_start(dev, 1);
41
42	if (!request_region(base, 8, DRV_NAME)) {
43		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
44				DRV_NAME, base, base + 7);
45		return -EBUSY;
46	}
47
48	if (!request_region(ctl, 1, DRV_NAME)) {
49		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
50				DRV_NAME, ctl);
51		release_region(base, 8);
52		return -EBUSY;
53	}
54
55	memset(&hw, 0, sizeof(hw));
56	ide_std_init_ports(&hw, base, ctl);
57	hw.irq = pnp_irq(dev, 0);
58
59	hwif = ide_find_port();
60	if (hwif) {
61		u8 index = hwif->index;
62		u8 idx[4] = { index, 0xff, 0xff, 0xff };
63
64		ide_init_port_data(hwif, index);
65		ide_init_port_hw(hwif, &hw);
66
67		printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
68		pnp_set_drvdata(dev, hwif);
69
70		ide_device_add(idx, NULL);
71
72		return 0;
73	}
74
75	release_region(ctl, 1);
76	release_region(base, 8);
77
78	return -1;
79}
80
81static void idepnp_remove(struct pnp_dev *dev)
82{
83	ide_hwif_t *hwif = pnp_get_drvdata(dev);
84
85	if (hwif)
86		ide_unregister(hwif->index);
87	else
88		printk(KERN_ERR "idepnp: Unable to remove device, please report.\n");
89
90	release_region(pnp_port_start(dev, 1), 1);
91	release_region(pnp_port_start(dev, 0), 8);
92}
93
94static struct pnp_driver idepnp_driver = {
95	.name		= "ide",
96	.id_table	= idepnp_devices,
97	.probe		= idepnp_probe,
98	.remove		= idepnp_remove,
99};
100
101static int __init pnpide_init(void)
102{
103	return pnp_register_driver(&idepnp_driver);
104}
105
106static void __exit pnpide_exit(void)
107{
108	pnp_unregister_driver(&idepnp_driver);
109}
110
111module_init(pnpide_init);
112module_exit(pnpide_exit);
113
114MODULE_LICENSE("GPL");
115