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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (c) 1999-2001 Vojtech Pavlik |
4 | * Copyright (c) 1999 Brian Gerst | |
5 | */ | |
6 | ||
7 | /* | |
8 | * NS558 based standard IBM game port driver for Linux | |
9 | */ | |
10 | ||
11 | /* | |
1da177e4 LT |
12 | */ |
13 | ||
14 | #include <asm/io.h> | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/ioport.h> | |
1da177e4 LT |
18 | #include <linux/init.h> |
19 | #include <linux/delay.h> | |
20 | #include <linux/gameport.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/pnp.h> | |
23 | ||
24 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
25 | MODULE_DESCRIPTION("Classic gameport (ISA/PnP) driver"); | |
26 | MODULE_LICENSE("GPL"); | |
27 | ||
28 | static int ns558_isa_portlist[] = { 0x201, 0x200, 0x202, 0x203, 0x204, 0x205, 0x207, 0x209, | |
29 | 0x20b, 0x20c, 0x20e, 0x20f, 0x211, 0x219, 0x101, 0 }; | |
30 | ||
31 | struct ns558 { | |
32 | int type; | |
33 | int io; | |
34 | int size; | |
35 | struct pnp_dev *dev; | |
36 | struct gameport *gameport; | |
37 | struct list_head node; | |
38 | }; | |
39 | ||
40 | static LIST_HEAD(ns558_list); | |
41 | ||
42 | /* | |
43 | * ns558_isa_probe() tries to find an isa gameport at the | |
44 | * specified address, and also checks for mirrors. | |
45 | * A joystick must be attached for this to work. | |
46 | */ | |
47 | ||
48 | static int ns558_isa_probe(int io) | |
49 | { | |
50 | int i, j, b; | |
51 | unsigned char c, u, v; | |
52 | struct ns558 *ns558; | |
53 | struct gameport *port; | |
54 | ||
55 | /* | |
56 | * No one should be using this address. | |
57 | */ | |
58 | ||
59 | if (!request_region(io, 1, "ns558-isa")) | |
60 | return -EBUSY; | |
61 | ||
62 | /* | |
63 | * We must not be able to write arbitrary values to the port. | |
64 | * The lower two axis bits must be 1 after a write. | |
65 | */ | |
66 | ||
67 | c = inb(io); | |
68 | outb(~c & ~3, io); | |
69 | if (~(u = v = inb(io)) & 3) { | |
70 | outb(c, io); | |
71 | release_region(io, 1); | |
72 | return -ENODEV; | |
73 | } | |
74 | /* | |
75 | * After a trigger, there must be at least some bits changing. | |
76 | */ | |
77 | ||
78 | for (i = 0; i < 1000; i++) v &= inb(io); | |
79 | ||
80 | if (u == v) { | |
81 | outb(c, io); | |
82 | release_region(io, 1); | |
83 | return -ENODEV; | |
84 | } | |
85 | msleep(3); | |
86 | /* | |
87 | * After some time (4ms) the axes shouldn't change anymore. | |
88 | */ | |
89 | ||
90 | u = inb(io); | |
91 | for (i = 0; i < 1000; i++) | |
92 | if ((u ^ inb(io)) & 0xf) { | |
93 | outb(c, io); | |
94 | release_region(io, 1); | |
95 | return -ENODEV; | |
96 | } | |
97 | /* | |
98 | * And now find the number of mirrors of the port. | |
99 | */ | |
100 | ||
101 | for (i = 1; i < 5; i++) { | |
102 | ||
103 | release_region(io & (-1 << (i - 1)), (1 << (i - 1))); | |
104 | ||
105 | if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) | |
106 | break; /* Don't disturb anyone */ | |
107 | ||
108 | outb(0xff, io & (-1 << i)); | |
109 | for (j = b = 0; j < 1000; j++) | |
110 | if (inb(io & (-1 << i)) != inb((io & (-1 << i)) + (1 << i) - 1)) b++; | |
111 | msleep(3); | |
112 | ||
113 | if (b > 300) { /* We allow 30% difference */ | |
114 | release_region(io & (-1 << i), (1 << i)); | |
115 | break; | |
116 | } | |
117 | } | |
118 | ||
119 | i--; | |
120 | ||
121 | if (i != 4) { | |
122 | if (!request_region(io & (-1 << i), (1 << i), "ns558-isa")) | |
123 | return -EBUSY; | |
124 | } | |
125 | ||
a97e148a | 126 | ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL); |
1da177e4 LT |
127 | port = gameport_allocate_port(); |
128 | if (!ns558 || !port) { | |
129 | printk(KERN_ERR "ns558: Memory allocation failed.\n"); | |
130 | release_region(io & (-1 << i), (1 << i)); | |
131 | kfree(ns558); | |
132 | gameport_free_port(port); | |
133 | return -ENOMEM; | |
134 | } | |
135 | ||
1da177e4 LT |
136 | ns558->io = io; |
137 | ns558->size = 1 << i; | |
138 | ns558->gameport = port; | |
139 | ||
140 | port->io = io; | |
141 | gameport_set_name(port, "NS558 ISA Gameport"); | |
142 | gameport_set_phys(port, "isa%04x/gameport0", io & (-1 << i)); | |
143 | ||
144 | gameport_register_port(port); | |
145 | ||
146 | list_add(&ns558->node, &ns558_list); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | #ifdef CONFIG_PNP | |
152 | ||
35c4b918 | 153 | static const struct pnp_device_id pnp_devids[] = { |
1da177e4 LT |
154 | { .id = "@P@0001", .driver_data = 0 }, /* ALS 100 */ |
155 | { .id = "@P@0020", .driver_data = 0 }, /* ALS 200 */ | |
156 | { .id = "@P@1001", .driver_data = 0 }, /* ALS 100+ */ | |
157 | { .id = "@P@2001", .driver_data = 0 }, /* ALS 120 */ | |
158 | { .id = "ASB16fd", .driver_data = 0 }, /* AdLib NSC16 */ | |
159 | { .id = "AZT3001", .driver_data = 0 }, /* AZT1008 */ | |
160 | { .id = "CDC0001", .driver_data = 0 }, /* Opl3-SAx */ | |
161 | { .id = "CSC0001", .driver_data = 0 }, /* CS4232 */ | |
162 | { .id = "CSC000f", .driver_data = 0 }, /* CS4236 */ | |
163 | { .id = "CSC0101", .driver_data = 0 }, /* CS4327 */ | |
164 | { .id = "CTL7001", .driver_data = 0 }, /* SB16 */ | |
165 | { .id = "CTL7002", .driver_data = 0 }, /* AWE64 */ | |
166 | { .id = "CTL7005", .driver_data = 0 }, /* Vibra16 */ | |
167 | { .id = "ENS2020", .driver_data = 0 }, /* SoundscapeVIVO */ | |
168 | { .id = "ESS0001", .driver_data = 0 }, /* ES1869 */ | |
169 | { .id = "ESS0005", .driver_data = 0 }, /* ES1878 */ | |
170 | { .id = "ESS6880", .driver_data = 0 }, /* ES688 */ | |
171 | { .id = "IBM0012", .driver_data = 0 }, /* CS4232 */ | |
172 | { .id = "OPT0001", .driver_data = 0 }, /* OPTi Audio16 */ | |
173 | { .id = "YMH0006", .driver_data = 0 }, /* Opl3-SA */ | |
174 | { .id = "YMH0022", .driver_data = 0 }, /* Opl3-SAx */ | |
175 | { .id = "PNPb02f", .driver_data = 0 }, /* Generic */ | |
176 | { .id = "", }, | |
177 | }; | |
178 | ||
179 | MODULE_DEVICE_TABLE(pnp, pnp_devids); | |
180 | ||
181 | static int ns558_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *did) | |
182 | { | |
183 | int ioport, iolen; | |
184 | struct ns558 *ns558; | |
185 | struct gameport *port; | |
186 | ||
187 | if (!pnp_port_valid(dev, 0)) { | |
188 | printk(KERN_WARNING "ns558: No i/o ports on a gameport? Weird\n"); | |
189 | return -ENODEV; | |
190 | } | |
191 | ||
192 | ioport = pnp_port_start(dev, 0); | |
193 | iolen = pnp_port_len(dev, 0); | |
194 | ||
195 | if (!request_region(ioport, iolen, "ns558-pnp")) | |
196 | return -EBUSY; | |
197 | ||
a97e148a | 198 | ns558 = kzalloc(sizeof(struct ns558), GFP_KERNEL); |
1da177e4 LT |
199 | port = gameport_allocate_port(); |
200 | if (!ns558 || !port) { | |
201 | printk(KERN_ERR "ns558: Memory allocation failed\n"); | |
202 | kfree(ns558); | |
203 | gameport_free_port(port); | |
204 | return -ENOMEM; | |
205 | } | |
206 | ||
207 | ns558->io = ioport; | |
208 | ns558->size = iolen; | |
209 | ns558->dev = dev; | |
210 | ns558->gameport = port; | |
211 | ||
212 | gameport_set_name(port, "NS558 PnP Gameport"); | |
a6c2490f | 213 | gameport_set_phys(port, "pnp%s/gameport0", dev_name(&dev->dev)); |
1da177e4 LT |
214 | port->dev.parent = &dev->dev; |
215 | port->io = ioport; | |
216 | ||
217 | gameport_register_port(port); | |
218 | ||
219 | list_add_tail(&ns558->node, &ns558_list); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | static struct pnp_driver ns558_pnp_driver = { | |
224 | .name = "ns558", | |
225 | .id_table = pnp_devids, | |
226 | .probe = ns558_pnp_probe, | |
227 | }; | |
228 | ||
229 | #else | |
230 | ||
231 | static struct pnp_driver ns558_pnp_driver; | |
232 | ||
233 | #endif | |
234 | ||
1da177e4 LT |
235 | static int __init ns558_init(void) |
236 | { | |
237 | int i = 0; | |
dd55563f | 238 | int error; |
1da177e4 | 239 | |
dd55563f BH |
240 | error = pnp_register_driver(&ns558_pnp_driver); |
241 | if (error && error != -ENODEV) /* should be ENOSYS really */ | |
242 | return error; | |
f6397cec | 243 | |
1da177e4 | 244 | /* |
f6397cec VP |
245 | * Probe ISA ports after PnP, so that PnP ports that are already |
246 | * enabled get detected as PnP. This may be suboptimal in multi-device | |
247 | * configurations, but saves hassle with simple setups. | |
1da177e4 LT |
248 | */ |
249 | ||
250 | while (ns558_isa_portlist[i]) | |
251 | ns558_isa_probe(ns558_isa_portlist[i++]); | |
252 | ||
dd55563f | 253 | return list_empty(&ns558_list) && error ? -ENODEV : 0; |
1da177e4 LT |
254 | } |
255 | ||
256 | static void __exit ns558_exit(void) | |
257 | { | |
22d0def9 | 258 | struct ns558 *ns558, *safe; |
1da177e4 | 259 | |
22d0def9 | 260 | list_for_each_entry_safe(ns558, safe, &ns558_list, node) { |
1da177e4 LT |
261 | gameport_unregister_port(ns558->gameport); |
262 | release_region(ns558->io & ~(ns558->size - 1), ns558->size); | |
263 | kfree(ns558); | |
264 | } | |
265 | ||
dd55563f | 266 | pnp_unregister_driver(&ns558_pnp_driver); |
1da177e4 LT |
267 | } |
268 | ||
269 | module_init(ns558_init); | |
270 | module_exit(ns558_exit); |