ASoC: Fix Blackfin I2S _pointer() implementation return in bounds values
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / input / gameport / ns558.c
blob7c217848613ef2a0e2367bf32f36c5b7ed63e1d7
1 /*
2 * Copyright (c) 1999-2001 Vojtech Pavlik
3 * Copyright (c) 1999 Brian Gerst
4 */
6 /*
7 * NS558 based standard IBM game port driver for Linux
8 */
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 * Should you need to contact me, the author, you can do so either by
26 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
27 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30 #include <asm/io.h>
32 #include <linux/module.h>
33 #include <linux/ioport.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
36 #include <linux/gameport.h>
37 #include <linux/slab.h>
38 #include <linux/pnp.h>
40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
41 MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver");
42 MODULE_LICENSE("GPL");
44 static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209,
45 0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 };
47 struct ns558 {
48 int type;
49 int io;
50 int size;
51 struct pnp_dev *dev;
52 struct gameport *gameport;
53 struct list_head node;
56 static LIST_HEAD(ns558_list);
59 * ns558_isa_probe() tries to find an isa gameport at the
60 * specified address, and also checks for mirrors.
61 * A joystick must be attached for this to work.
64 static int ns558_isa_probe(int io)
66 int i, j, b;
67 unsigned char c, u, v;
68 struct ns558 *ns558;
69 struct gameport *port;
72 * No one should be using this address.
75 if (!request_region(io, 1, "ns558-isa"))
76 return -EBUSY;
79 * We must not be able to write arbitrary values to the port.
80 * The lower two axis bits must be 1 after a write.
83 c = inb(io);
84 outb(~c & ~3, io);
85 if (~(u = v = inb(io)) & 3) {
86 outb(c, io);
87 release_region(io, 1);
88 return -ENODEV;
91 * After a trigger, there must be at least some bits changing.
94 for (i = 0; i < 1000; i++) v &= inb(io);
96 if (u == v) {
97 outb(c, io);
98 release_region(io, 1);
99 return -ENODEV;
101 msleep(3);
103 * After some time (4ms) the axes shouldn't change anymore.
106 u = inb(io);
107 for (i = 0; i < 1000; i++)
108 if ((u ^ inb(io)) & 0xf) {
109 outb(c, io);
110 release_region(io, 1);
111 return -ENODEV;
114 * And now find the number of mirrors of the port.
117 for (i = 1; i < 5; i++) {
119 release_region(io & (-1 << (i - 1)), (1 << (i - 1)));
121 if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
122 break; /* Don't disturb anyone */
124 outb(0xff, io & (-1 << i));
125 for (j = b = 0; j < 1000; j++)
126 if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++;
127 msleep(3);
129 if (b > 300) { /* We allow 30% difference */
130 release_region(io & (-1 << i), (1 << i));
131 break;
135 i--;
137 if (i != 4) {
138 if (!request_region(io & (-1 << i), (1 << i), "ns558-isa"))
139 return -EBUSY;
142 ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
143 port = gameport_allocate_port();
144 if (!ns558 || !port) {
145 printk(KERN_ERR "ns558: Memory allocation failed.\n");
146 release_region(io & (-1 << i), (1 << i));
147 kfree(ns558);
148 gameport_free_port(port);
149 return -ENOMEM;
152 ns558->io = io;
153 ns558->size = 1 << i;
154 ns558->gameport = port;
156 port->io = io;
157 gameport_set_name(port, "NS558 ISA Gameport");
158 gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i));
160 gameport_register_port(port);
162 list_add(&ns558->node, &ns558_list);
164 return 0;
167 #ifdef CONFIG_PNP
169 static const struct pnp_device_id pnp_devids[] = {
170 { .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */
171 { .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */
172 { .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */
173 { .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */
174 { .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */
175 { .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */
176 { .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */
177 { .id = "CSC0001", .driver_data = 0 }, /* CS4232 */
178 { .id = "CSC000f", .driver_data = 0 }, /* CS4236 */
179 { .id = "CSC0101", .driver_data = 0 }, /* CS4327 */
180 { .id = "CTL7001", .driver_data = 0 }, /* SB16 */
181 { .id = "CTL7002", .driver_data = 0 }, /* AWE64 */
182 { .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */
183 { .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */
184 { .id = "ESS0001", .driver_data = 0 }, /* ES1869 */
185 { .id = "ESS0005", .driver_data = 0 }, /* ES1878 */
186 { .id = "ESS6880", .driver_data = 0 }, /* ES688 */
187 { .id = "IBM0012", .driver_data = 0 }, /* CS4232 */
188 { .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */
189 { .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */
190 { .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */
191 { .id = "PNPb02f", .driver_data = 0 }, /* Generic */
192 { .id = "", },
195 MODULE_DEVICE_TABLE(pnp, pnp_devids);
197 static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did)
199 int ioport, iolen;
200 struct ns558 *ns558;
201 struct gameport *port;
203 if (!pnp_port_valid(dev, 0)) {
204 printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n");
205 return -ENODEV;
208 ioport = pnp_port_start(dev, 0);
209 iolen = pnp_port_len(dev, 0);
211 if (!request_region(ioport, iolen, "ns558-pnp"))
212 return -EBUSY;
214 ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL);
215 port = gameport_allocate_port();
216 if (!ns558 || !port) {
217 printk(KERN_ERR "ns558: Memory allocation failed\n");
218 kfree(ns558);
219 gameport_free_port(port);
220 return -ENOMEM;
223 ns558->io = ioport;
224 ns558->size = iolen;
225 ns558->dev = dev;
226 ns558->gameport = port;
228 gameport_set_name(port, "NS558 PnP Gameport");
229 gameport_set_phys(port, "pnp%s/gameport0", dev_name(&dev->dev));
230 port->dev.parent = &dev->dev;
231 port->io = ioport;
233 gameport_register_port(port);
235 list_add_tail(&ns558->node, &ns558_list);
236 return 0;
239 static struct pnp_driver ns558_pnp_driver = {
240 .name = "ns558",
241 .id_table = pnp_devids,
242 .probe = ns558_pnp_probe,
245 #else
247 static struct pnp_driver ns558_pnp_driver;
249 #endif
251 static int __init ns558_init(void)
253 int i = 0;
254 int error;
256 error = pnp_register_driver(&ns558_pnp_driver);
257 if (error && error != -ENODEV) /* should be ENOSYS really */
258 return error;
261 * Probe ISA ports after PnP, so that PnP ports that are already
262 * enabled get detected as PnP. This may be suboptimal in multi-device
263 * configurations, but saves hassle with simple setups.
266 while (ns558_isa_portlist[i])
267 ns558_isa_probe(ns558_isa_portlist[i++]);
269 return list_empty(&ns558_list) && error ? -ENODEV : 0;
272 static void __exit ns558_exit(void)
274 struct ns558 *ns558, *safe;
276 list_for_each_entry_safe(ns558, safe, &ns558_list, node) {
277 gameport_unregister_port(ns558->gameport);
278 release_region(ns558->io & ~(ns558->size - 1), ns558->size);
279 kfree(ns558);
282 pnp_unregister_driver(&ns558_pnp_driver);
285 module_init(ns558_init);
286 module_exit(ns558_exit);