aboutsummaryrefslogtreecommitdiff
path: root/drivers/input/gameport/ns558.c
blob: 3e2d28f263e9ad56c7b2cb7f3c4d697b28e849db (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/*
 * $Id: ns558.c,v 1.43 2002/01/24 19:23:21 vojtech Exp $
 *
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *  Copyright (c) 1999 Brian Gerst
 */

/*
 * NS558 based standard IBM game port driver for Linux
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <asm/io.h>

#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gameport.h>
#include <linux/slab.h>
#include <linux/pnp.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
MODULE_LICENSE("GPL");

static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
				    0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };

struct ns558 {
	int type;
	int io;
	int size;
	struct pnp_dev *dev;
	struct gameport *gameport;
	struct list_head node;
};

static LIST_HEAD(ns558_list);

/*
 * ns558_isa_probe() tries to find an isa gameport at the
 * specified address, and also checks for mirrors.
 * A joystick must be attached for this to work.
 */

static int ns558_isa_probe(int io)
{
	int i, j, b;
	unsigned char c, u, v;
	struct ns558 *ns558;
	struct gameport *port;

/*
 * No one should be using this address.
 */

	if (!request_region(io, 1, "ns558-isa"))
		return -EBUSY;

/*
 * We must not be able to write arbitrary values to the port.
 * The lower two axis bits must be 1 after a write.
 */

	c = inb(io);
	outb(~c & ~3, io);
	if (~(u = v = inb(io)) & 3) {
		outb(c, io);
		release_region(io, 1);
		return -ENODEV;
	}
/*
 * After a trigger, there must be at least some bits changing.
 */

	for (i = 0; i < 1000; i++) v &= inb(io);

	if (u == v) {
		outb(c, io);
		release_region(io, 1);
		return -ENODEV;
	}
	msleep(3);
/*
 * After some time (4ms) the axes shouldn't change anymore.
 */

	u = inb(io);
	for (i = 0; i < 1000; i++)
		if ((u ^ inb(io)) & 0xf) {
			outb(c, io);
			release_region(io, 1);
			return -ENODEV;
		}
/*
 * And now find the number of mirrors of the port.
 */

	for (i = 1; i < 5; i++) {

		release_region(io & (-1 << (i - 1)), (1 << (i - 1)));

		if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
			break;				/* Don't disturb anyone */

		outb(0xff, io & (-1 << i));
		for (j = b = 0; j < 1000; j++)
			if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
		msleep(3);

		if (b > 300) {				/* We allow 30% difference */
			release_region(io & (-1 << i), (1 << i));
			break;
		}
	}

	i--;

	if (i != 4) {
		if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
			return -EBUSY;
	}

	ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
	port = gameport_allocate_port();
	if (!ns558 || !port) {
		printk(KERN_ERR "ns558: Memory allocation failed.\n");
		release_region(io & (-1 << i), (1 << i));
		kfree(ns558);
		gameport_free_port(port);
		return -ENOMEM;
	}

	memset(ns558, 0, sizeof(struct ns558));
	ns558->io = io;
	ns558->size = 1 << i;
	ns558->gameport = port;

	port->io = io;
	gameport_set_name(port, "NS558 ISA Gameport");
	gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i));

	gameport_register_port(port);

	list_add(&ns558->node, &ns558_list);

	return 0;
}

#ifdef CONFIG_PNP

static struct pnp_device_id pnp_devids[] = {
	{ .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */
	{ .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */
	{ .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */
	{ .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */
	{ .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */
	{ .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */
	{ .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */
	{ .id = "CSC0001", .driver_data = 0 }, /* CS4232 */
	{ .id = "CSC000f", .driver_data = 0 }, /* CS4236 */
	{ .id = "CSC0101", .driver_data = 0 }, /* CS4327 */
	{ .id = "CTL7001", .driver_data = 0 }, /* SB16 */
	{ .id = "CTL7002", .driver_data = 0 }, /* AWE64 */
	{ .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */
	{ .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */
	{ .id = "ESS0001", .driver_data = 0 }, /* ES1869 */
	{ .id = "ESS0005", .driver_data = 0 }, /* ES1878 */
	{ .id = "ESS6880", .driver_data = 0 }, /* ES688 */
	{ .id = "IBM0012", .driver_data = 0 }, /* CS4232 */
	{ .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */
	{ .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */
	{ .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */
	{ .id = "PNPb02f", .driver_data = 0 }, /* Generic */
	{ .id = "", },
};

MODULE_DEVICE_TABLE(pnp, pnp_devids);

static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did)
{
	int ioport, iolen;
	struct ns558 *ns558;
	struct gameport *port;

	if (!pnp_port_valid(dev, 0)) {
		printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
		return -ENODEV;
	}

	ioport = pnp_port_start(dev, 0);
	iolen = pnp_port_len(dev, 0);

	if (!request_region(ioport, iolen, "ns558-pnp"))
		return -EBUSY;

	ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
	port = gameport_allocate_port();
	if (!ns558 || !port) {
		printk(KERN_ERR "ns558: Memory allocation failed\n");
		kfree(ns558);
		gameport_free_port(port);
		return -ENOMEM;
	}

	ns558->io = ioport;
	ns558->size = iolen;
	ns558->dev = dev;
	ns558->gameport = port;

	gameport_set_name(port, "NS558 PnP Gameport");
	gameport_set_phys(port, "pnp%s/gameport0", dev->dev.bus_id);
	port->dev.parent = &dev->dev;
	port->io = ioport;

	gameport_register_port(port);

	list_add_tail(&ns558->node, &ns558_list);
	return 0;
}

static struct pnp_driver ns558_pnp_driver = {
	.name		= "ns558",
	.id_table	= pnp_devids,
	.probe		= ns558_pnp_probe,
};

#else

static struct pnp_driver ns558_pnp_driver;

#endif

static int __init ns558_init(void)
{
	int i = 0;
	int error;

	error = pnp_register_driver(&ns558_pnp_driver);
	if (error && error != -ENODEV)	/* should be ENOSYS really */
		return error;

/*
 * Probe ISA ports after PnP, so that PnP ports that are already
 * enabled get detected as PnP. This may be suboptimal in multi-device
 * configurations, but saves hassle with simple setups.
 */

	while (ns558_isa_portlist[i])
		ns558_isa_probe(ns558_isa_portlist[i++]);

	return list_empty(&ns558_list) && error ? -ENODEV : 0;
}

static void __exit ns558_exit(void)
{
	struct ns558 *ns558, *safe;

	list_for_each_entry_safe(ns558, safe, &ns558_list, node) {
		gameport_unregister_port(ns558->gameport);
		release_region(ns558->io & ~(ns558->size - 1), ns558->size);
		kfree(ns558);
	}

	pnp_unregister_driver(&ns558_pnp_driver);
}

module_init(ns558_init);
module_exit(ns558_exit);