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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 1999-2001 Vojtech Pavlik |
3 | * Copyright (c) 1999 Brian Gerst | |
4 | */ | |
5 | ||
6 | /* | |
7 | * NS558 based standard IBM game port driver for Linux | |
8 | */ | |
9 | ||
10 | /* | |
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. | |
15 | * | |
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. | |
20 | * | |
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 | |
24 | * | |
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 | |
28 | */ | |
29 | ||
30 | #include <asm/io.h> | |
31 | ||
32 | #include <linux/module.h> | |
33 | #include <linux/ioport.h> | |
1da177e4 LT |
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> | |
39 | ||
40 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
41 | MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209, | |
45 | 0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 }; | |
46 | ||
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; | |
54 | }; | |
55 | ||
56 | static LIST_HEAD(ns558_list); | |
57 | ||
58 | /* | |
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. | |
62 | */ | |
63 | ||
64 | static int ns558_isa_probe(int io) | |
65 | { | |
66 | int i, j, b; | |
67 | unsigned char c, u, v; | |
68 | struct ns558 *ns558; | |
69 | struct gameport *port; | |
70 | ||
71 | /* | |
72 | * No one should be using this address. | |
73 | */ | |
74 | ||
75 | if (!request_region(io, 1, "ns558-isa")) | |
76 | return -EBUSY; | |
77 | ||
78 | /* | |
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. | |
81 | */ | |
82 | ||
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; | |
89 | } | |
90 | /* | |
91 | * After a trigger, there must be at least some bits changing. | |
92 | */ | |
93 | ||
94 | for (i = 0; i < 1000; i++) v &= inb(io); | |
95 | ||
96 | if (u == v) { | |
97 | outb(c, io); | |
98 | release_region(io, 1); | |
99 | return -ENODEV; | |
100 | } | |
101 | msleep(3); | |
102 | /* | |
103 | * After some time (4ms) the axes shouldn't change anymore. | |
104 | */ | |
105 | ||
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; | |
112 | } | |
113 | /* | |
114 | * And now find the number of mirrors of the port. | |
115 | */ | |
116 | ||
117 | for (i = 1; i < 5; i++) { | |
118 | ||
119 | release_region(io & (-1 << (i - 1)), (1 << (i - 1))); | |
120 | ||
121 | if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) | |
122 | break; /* Don't disturb anyone */ | |
123 | ||
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); | |
128 | ||
129 | if (b > 300) { /* We allow 30% difference */ | |
130 | release_region(io & (-1 << i), (1 << i)); | |
131 | break; | |
132 | } | |
133 | } | |
134 | ||
135 | i--; | |
136 | ||
137 | if (i != 4) { | |
138 | if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) | |
139 | return -EBUSY; | |
140 | } | |
141 | ||
a97e148a | 142 | ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL); |
1da177e4 LT |
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; | |
150 | } | |
151 | ||
1da177e4 LT |
152 | ns558->io = io; |
153 | ns558->size = 1 << i; | |
154 | ns558->gameport = port; | |
155 | ||
156 | port->io = io; | |
157 | gameport_set_name(port, "NS558 ISA Gameport"); | |
158 | gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i)); | |
159 | ||
160 | gameport_register_port(port); | |
161 | ||
162 | list_add(&ns558->node, &ns558_list); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | #ifdef CONFIG_PNP | |
168 | ||
35c4b918 | 169 | static const struct pnp_device_id pnp_devids[] = { |
1da177e4 LT |
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 = "", }, | |
193 | }; | |
194 | ||
195 | MODULE_DEVICE_TABLE(pnp, pnp_devids); | |
196 | ||
197 | static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did) | |
198 | { | |
199 | int ioport, iolen; | |
200 | struct ns558 *ns558; | |
201 | struct gameport *port; | |
202 | ||
203 | if (!pnp_port_valid(dev, 0)) { | |
204 | printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n"); | |
205 | return -ENODEV; | |
206 | } | |
207 | ||
208 | ioport = pnp_port_start(dev, 0); | |
209 | iolen = pnp_port_len(dev, 0); | |
210 | ||
211 | if (!request_region(ioport, iolen, "ns558-pnp")) | |
212 | return -EBUSY; | |
213 | ||
a97e148a | 214 | ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL); |
1da177e4 LT |
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; | |
221 | } | |
222 | ||
223 | ns558->io = ioport; | |
224 | ns558->size = iolen; | |
225 | ns558->dev = dev; | |
226 | ns558->gameport = port; | |
227 | ||
228 | gameport_set_name(port, "NS558 PnP Gameport"); | |
a6c2490f | 229 | gameport_set_phys(port, "pnp%s/gameport0", dev_name(&dev->dev)); |
1da177e4 LT |
230 | port->dev.parent = &dev->dev; |
231 | port->io = ioport; | |
232 | ||
233 | gameport_register_port(port); | |
234 | ||
235 | list_add_tail(&ns558->node, &ns558_list); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static struct pnp_driver ns558_pnp_driver = { | |
240 | .name = "ns558", | |
241 | .id_table = pnp_devids, | |
242 | .probe = ns558_pnp_probe, | |
243 | }; | |
244 | ||
245 | #else | |
246 | ||
247 | static struct pnp_driver ns558_pnp_driver; | |
248 | ||
249 | #endif | |
250 | ||
1da177e4 LT |
251 | static int __init ns558_init(void) |
252 | { | |
253 | int i = 0; | |
dd55563f | 254 | int error; |
1da177e4 | 255 | |
dd55563f BH |
256 | error = pnp_register_driver(&ns558_pnp_driver); |
257 | if (error && error != -ENODEV) /* should be ENOSYS really */ | |
258 | return error; | |
f6397cec | 259 | |
1da177e4 | 260 | /* |
f6397cec VP |
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. | |
1da177e4 LT |
264 | */ |
265 | ||
266 | while (ns558_isa_portlist[i]) | |
267 | ns558_isa_probe(ns558_isa_portlist[i++]); | |
268 | ||
dd55563f | 269 | return list_empty(&ns558_list) && error ? -ENODEV : 0; |
1da177e4 LT |
270 | } |
271 | ||
272 | static void __exit ns558_exit(void) | |
273 | { | |
22d0def9 | 274 | struct ns558 *ns558, *safe; |
1da177e4 | 275 | |
22d0def9 | 276 | list_for_each_entry_safe(ns558, safe, &ns558_list, node) { |
1da177e4 LT |
277 | gameport_unregister_port(ns558->gameport); |
278 | release_region(ns558->io & ~(ns558->size - 1), ns558->size); | |
279 | kfree(ns558); | |
280 | } | |
281 | ||
dd55563f | 282 | pnp_unregister_driver(&ns558_pnp_driver); |
1da177e4 LT |
283 | } |
284 | ||
285 | module_init(ns558_init); | |
286 | module_exit(ns558_exit); |