File: /usr/src/linux/drivers/char/joystick/ns558.c
1 /*
2 * $Id: ns558.c,v 1.29 2001/04/24 07:48:56 vojtech Exp $
3 *
4 * Copyright (c) 1999-2001 Vojtech Pavlik
5 * Copyright (c) 1999 Brian Gerst
6 *
7 * Sponsored by SuSE
8 */
9
10 /*
11 * NS558 based standard IBM game port driver for Linux
12 */
13
14 /*
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 *
29 * Should you need to contact me, the author, you can do so either by
30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
31 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
32 */
33
34 #include <asm/io.h>
35
36 #include <linux/module.h>
37 #include <linux/ioport.h>
38 #include <linux/config.h>
39 #include <linux/init.h>
40 #include <linux/gameport.h>
41 #include <linux/slab.h>
42 #include <linux/isapnp.h>
43
44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
45 MODULE_LICENSE("GPL");
46
47 #define NS558_ISA 1
48 #define NS558_PNP 2
49
50 static int ns558_isa_portlist[] = { 0x200, 0x201, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
51 0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
52
53 struct ns558 {
54 int type;
55 int size;
56 struct pci_dev *dev;
57 struct ns558 *next;
58 struct gameport gameport;
59 };
60
61 static struct ns558 *ns558;
62
63 /*
64 * ns558_isa_probe() tries to find an isa gameport at the
65 * specified address, and also checks for mirrors.
66 * A joystick must be attached for this to work.
67 */
68
69 static struct ns558* ns558_isa_probe(int io, struct ns558 *next)
70 {
71 int i, j, b;
72 unsigned char c, u, v;
73 struct ns558 *port;
74
75 /*
76 * No one should be using this address.
77 */
78
79 if (check_region(io, 1))
80 return next;
81
82 /*
83 * We must not be able to write arbitrary values to the port.
84 * The lower two axis bits must be 1 after a write.
85 */
86
87 c = inb(io);
88 outb(~c & ~3, io);
89 if (~(u = v = inb(io)) & 3) {
90 outb(c, io);
91 return next;
92 }
93 /*
94 * After a trigger, there must be at least some bits changing.
95 */
96
97 for (i = 0; i < 1000; i++) v &= inb(io);
98
99 if (u == v) {
100 outb(c, io);
101 return next;
102 }
103 wait_ms(3);
104 /*
105 * After some time (4ms) the axes shouldn't change anymore.
106 */
107
108 u = inb(io);
109 for (i = 0; i < 1000; i++)
110 if ((u ^ inb(io)) & 0xf) {
111 outb(c, io);
112 return next;
113 }
114 /*
115 * And now find the number of mirrors of the port.
116 */
117
118 for (i = 1; i < 5; i++) {
119
120 if (check_region(io & (-1 << i), (1 << i))) /* Don't disturb anyone */
121 break;
122
123 outb(0xff, io & (-1 << i));
124 for (j = b = 0; j < 1000; j++)
125 if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
126 wait_ms(3);
127
128 if (b > 300) /* We allow 30% difference */
129 break;
130 }
131
132 i--;
133
134 if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
135 printk(KERN_ERR "ns558: Memory allocation failed.\n");
136 return next;
137 }
138 memset(port, 0, sizeof(struct ns558));
139
140 port->next = next;
141 port->type = NS558_ISA;
142 port->size = (1 << i);
143 port->gameport.io = io & (-1 << i);
144
145 request_region(port->gameport.io, (1 << i), "ns558-isa");
146
147 gameport_register_port(&port->gameport);
148
149 printk(KERN_INFO "gameport%d: NS558 ISA at %#x", port->gameport.number, port->gameport.io);
150 if (port->size > 1) printk(" size %d", port->size);
151 printk(" speed %d kHz\n", port->gameport.speed);
152
153 return port;
154 }
155
156 #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
157 #define NSS558_ISAPNP
158 #endif
159
160 #ifdef NSS558_ISAPNP
161
162 static struct isapnp_device_id pnp_devids[] = {
163 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('@','P','@'), ISAPNP_DEVICE(0x0001), 0 },
164 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('@','P','@'), ISAPNP_DEVICE(0x2001), 0 },
165 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x7001), 0 },
166 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','T','L'), ISAPNP_DEVICE(0x7002), 0 },
167 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0010), 0 },
168 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0110), 0 },
169 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0b35), 0 },
170 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0010), 0 },
171 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('C','S','C'), ISAPNP_DEVICE(0x0110), 0 },
172 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, ISAPNP_VENDOR('P','N','P'), ISAPNP_DEVICE(0xb02f), 0 },
173 { 0, },
174 };
175
176 MODULE_DEVICE_TABLE(isapnp, pnp_devids);
177
178 static struct ns558* ns558_pnp_probe(struct pci_dev *dev, struct ns558 *next)
179 {
180 int ioport, iolen;
181 struct ns558 *port;
182
183 if (dev->prepare && dev->prepare(dev) < 0)
184 return next;
185
186 if (!(dev->resource[0].flags & IORESOURCE_IO)) {
187 printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
188 return next;
189 }
190
191 if (dev->activate && dev->activate(dev) < 0) {
192 printk(KERN_ERR "ns558: PnP resource allocation failed\n");
193 return next;
194 }
195
196 ioport = pci_resource_start(dev, 0);
197 iolen = pci_resource_len(dev, 0);
198
199 if (!request_region(ioport, iolen, "ns558-pnp"))
200 goto deactivate;
201
202 if (!(port = kmalloc(sizeof(struct ns558), GFP_KERNEL))) {
203 printk(KERN_ERR "ns558: Memory allocation failed.\n");
204 goto deactivate;
205 }
206 memset(port, 0, sizeof(struct ns558));
207
208 port->next = next;
209 port->type = NS558_PNP;
210 port->gameport.io = ioport;
211 port->size = iolen;
212 port->dev = dev;
213
214 gameport_register_port(&port->gameport);
215
216 printk(KERN_INFO "gameport%d: NS558 PnP at %#x", port->gameport.number, port->gameport.io);
217 if (iolen > 1) printk(" size %d", iolen);
218 printk(" speed %d kHz\n", port->gameport.speed);
219
220 return port;
221
222 deactivate:
223 if (dev->deactivate)
224 dev->deactivate(dev);
225 return next;
226 }
227 #endif
228
229 int __init ns558_init(void)
230 {
231 int i = 0;
232 #ifdef NSS558_ISAPNP
233 struct isapnp_device_id *devid;
234 struct pci_dev *dev = NULL;
235 #endif
236
237 /*
238 * Probe for ISA ports.
239 */
240
241 while (ns558_isa_portlist[i])
242 ns558 = ns558_isa_probe(ns558_isa_portlist[i++], ns558);
243
244 /*
245 * Probe for PnP ports.
246 */
247
248 #ifdef NSS558_ISAPNP
249 for (devid = pnp_devids; devid->vendor; devid++) {
250 while ((dev = isapnp_find_dev(NULL, devid->vendor, devid->function, dev))) {
251 ns558 = ns558_pnp_probe(dev, ns558);
252 }
253 }
254 #endif
255
256 return ns558 ? 0 : -ENODEV;
257 }
258
259 void __exit ns558_exit(void)
260 {
261 struct ns558 *next, *port = ns558;
262
263 while (port) {
264 gameport_unregister_port(&port->gameport);
265 switch (port->type) {
266
267 #ifdef NSS558_ISAPNP
268 case NS558_PNP:
269 if (port->dev->deactivate)
270 port->dev->deactivate(port->dev);
271 /* fall through */
272 #endif
273
274 case NS558_ISA:
275 release_region(port->gameport.io, port->size);
276 break;
277
278 default:
279 break;
280 }
281
282 next = port->next;
283 kfree(port);
284 port = next;
285 }
286 }
287
288 module_init(ns558_init);
289 module_exit(ns558_exit);
290