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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 1998-2001 Vojtech Pavlik |
3 | */ | |
4 | ||
5 | /* | |
6 | * PDPI Lightning 4 gamecard driver for Linux. | |
7 | */ | |
8 | ||
9 | /* | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * Should you need to contact me, the author, you can do so either by | |
25 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: | |
26 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
27 | */ | |
28 | ||
29 | #include <asm/io.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/gameport.h> | |
1da177e4 LT |
37 | |
38 | #define L4_PORT 0x201 | |
39 | #define L4_SELECT_ANALOG 0xa4 | |
40 | #define L4_SELECT_DIGITAL 0xa5 | |
41 | #define L4_SELECT_SECONDARY 0xa6 | |
42 | #define L4_CMD_ID 0x80 | |
43 | #define L4_CMD_GETCAL 0x92 | |
44 | #define L4_CMD_SETCAL 0x93 | |
45 | #define L4_ID 0x04 | |
46 | #define L4_BUSY 0x01 | |
47 | #define L4_TIMEOUT 80 /* 80 us */ | |
48 | ||
49 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
50 | MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | struct l4 { | |
54 | struct gameport *gameport; | |
55 | unsigned char port; | |
56 | }; | |
57 | ||
58 | static struct l4 l4_ports[8]; | |
59 | ||
60 | /* | |
61 | * l4_wait_ready() waits for the L4 to become ready. | |
62 | */ | |
63 | ||
64 | static int l4_wait_ready(void) | |
65 | { | |
66 | unsigned int t = L4_TIMEOUT; | |
67 | ||
68 | while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--; | |
69 | return -(t <= 0); | |
70 | } | |
71 | ||
72 | /* | |
73 | * l4_cooked_read() reads data from the Lightning 4. | |
74 | */ | |
75 | ||
76 | static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons) | |
77 | { | |
78 | struct l4 *l4 = gameport->port_data; | |
79 | unsigned char status; | |
80 | int i, result = -1; | |
81 | ||
82 | outb(L4_SELECT_ANALOG, L4_PORT); | |
83 | outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT); | |
84 | ||
85 | if (inb(L4_PORT) & L4_BUSY) goto fail; | |
86 | outb(l4->port & 3, L4_PORT); | |
87 | ||
88 | if (l4_wait_ready()) goto fail; | |
89 | status = inb(L4_PORT); | |
90 | ||
91 | for (i = 0; i < 4; i++) | |
92 | if (status & (1 << i)) { | |
93 | if (l4_wait_ready()) goto fail; | |
94 | axes[i] = inb(L4_PORT); | |
95 | if (axes[i] > 252) axes[i] = -1; | |
96 | } | |
97 | ||
98 | if (status & 0x10) { | |
99 | if (l4_wait_ready()) goto fail; | |
100 | *buttons = inb(L4_PORT) & 0x0f; | |
101 | } | |
102 | ||
103 | result = 0; | |
104 | ||
105 | fail: outb(L4_SELECT_ANALOG, L4_PORT); | |
106 | return result; | |
107 | } | |
108 | ||
109 | static int l4_open(struct gameport *gameport, int mode) | |
110 | { | |
111 | struct l4 *l4 = gameport->port_data; | |
112 | ||
113 | if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED) | |
114 | return -1; | |
115 | outb(L4_SELECT_ANALOG, L4_PORT); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | /* | |
120 | * l4_getcal() reads the L4 with calibration values. | |
121 | */ | |
122 | ||
123 | static int l4_getcal(int port, int *cal) | |
124 | { | |
125 | int i, result = -1; | |
126 | ||
127 | outb(L4_SELECT_ANALOG, L4_PORT); | |
128 | outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT); | |
129 | if (inb(L4_PORT) & L4_BUSY) | |
130 | goto out; | |
131 | ||
132 | outb(L4_CMD_GETCAL, L4_PORT); | |
133 | if (l4_wait_ready()) | |
134 | goto out; | |
135 | ||
136 | if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) | |
137 | goto out; | |
138 | ||
139 | if (l4_wait_ready()) | |
140 | goto out; | |
141 | outb(port & 3, L4_PORT); | |
142 | ||
143 | for (i = 0; i < 4; i++) { | |
144 | if (l4_wait_ready()) | |
145 | goto out; | |
146 | cal[i] = inb(L4_PORT); | |
147 | } | |
148 | ||
149 | result = 0; | |
150 | ||
151 | out: outb(L4_SELECT_ANALOG, L4_PORT); | |
152 | return result; | |
153 | } | |
154 | ||
155 | /* | |
156 | * l4_setcal() programs the L4 with calibration values. | |
157 | */ | |
158 | ||
159 | static int l4_setcal(int port, int *cal) | |
160 | { | |
161 | int i, result = -1; | |
162 | ||
163 | outb(L4_SELECT_ANALOG, L4_PORT); | |
164 | outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT); | |
165 | if (inb(L4_PORT) & L4_BUSY) | |
166 | goto out; | |
167 | ||
168 | outb(L4_CMD_SETCAL, L4_PORT); | |
169 | if (l4_wait_ready()) | |
170 | goto out; | |
171 | ||
172 | if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) | |
173 | goto out; | |
174 | ||
175 | if (l4_wait_ready()) | |
176 | goto out; | |
177 | outb(port & 3, L4_PORT); | |
178 | ||
179 | for (i = 0; i < 4; i++) { | |
180 | if (l4_wait_ready()) | |
181 | goto out; | |
182 | outb(cal[i], L4_PORT); | |
183 | } | |
184 | ||
185 | result = 0; | |
186 | ||
187 | out: outb(L4_SELECT_ANALOG, L4_PORT); | |
188 | return result; | |
189 | } | |
190 | ||
191 | /* | |
192 | * l4_calibrate() calibrates the L4 for the attached device, so | |
193 | * that the device's resistance fits into the L4's 8-bit range. | |
194 | */ | |
195 | ||
196 | static int l4_calibrate(struct gameport *gameport, int *axes, int *max) | |
197 | { | |
198 | int i, t; | |
199 | int cal[4]; | |
200 | struct l4 *l4 = gameport->port_data; | |
201 | ||
202 | if (l4_getcal(l4->port, cal)) | |
203 | return -1; | |
204 | ||
205 | for (i = 0; i < 4; i++) { | |
206 | t = (max[i] * cal[i]) / 200; | |
207 | t = (t < 1) ? 1 : ((t > 255) ? 255 : t); | |
208 | axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t; | |
209 | axes[i] = (axes[i] > 252) ? 252 : axes[i]; | |
210 | cal[i] = t; | |
211 | } | |
212 | ||
213 | if (l4_setcal(l4->port, cal)) | |
214 | return -1; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static int __init l4_create_ports(int card_no) | |
220 | { | |
221 | struct l4 *l4; | |
222 | struct gameport *port; | |
223 | int i, idx; | |
224 | ||
225 | for (i = 0; i < 4; i++) { | |
226 | ||
227 | idx = card_no * 4 + i; | |
228 | l4 = &l4_ports[idx]; | |
229 | ||
230 | if (!(l4->gameport = port = gameport_allocate_port())) { | |
231 | printk(KERN_ERR "lightning: Memory allocation failed\n"); | |
232 | while (--i >= 0) { | |
233 | gameport_free_port(l4->gameport); | |
234 | l4->gameport = NULL; | |
235 | } | |
236 | return -ENOMEM; | |
237 | } | |
238 | l4->port = idx; | |
239 | ||
240 | port->port_data = l4; | |
241 | port->open = l4_open; | |
242 | port->cooked_read = l4_cooked_read; | |
243 | port->calibrate = l4_calibrate; | |
244 | ||
245 | gameport_set_name(port, "PDPI Lightning 4"); | |
246 | gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx); | |
247 | ||
248 | if (idx == 0) | |
249 | port->io = L4_PORT; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static int __init l4_add_card(int card_no) | |
256 | { | |
257 | int cal[4] = { 255, 255, 255, 255 }; | |
258 | int i, rev, result; | |
259 | struct l4 *l4; | |
260 | ||
261 | outb(L4_SELECT_ANALOG, L4_PORT); | |
262 | outb(L4_SELECT_DIGITAL + card_no, L4_PORT); | |
263 | ||
264 | if (inb(L4_PORT) & L4_BUSY) | |
265 | return -1; | |
266 | outb(L4_CMD_ID, L4_PORT); | |
267 | ||
268 | if (l4_wait_ready()) | |
269 | return -1; | |
270 | ||
271 | if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no) | |
272 | return -1; | |
273 | ||
274 | if (l4_wait_ready()) | |
275 | return -1; | |
276 | if (inb(L4_PORT) != L4_ID) | |
277 | return -1; | |
278 | ||
279 | if (l4_wait_ready()) | |
280 | return -1; | |
281 | rev = inb(L4_PORT); | |
282 | ||
283 | if (!rev) | |
284 | return -1; | |
285 | ||
286 | result = l4_create_ports(card_no); | |
287 | if (result) | |
288 | return result; | |
289 | ||
290 | printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n", | |
291 | card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT); | |
292 | ||
293 | for (i = 0; i < 4; i++) { | |
294 | l4 = &l4_ports[card_no * 4 + i]; | |
295 | ||
296 | if (rev > 0x28) /* on 2.9+ the setcal command works correctly */ | |
297 | l4_setcal(l4->port, cal); | |
298 | gameport_register_port(l4->gameport); | |
299 | } | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static int __init l4_init(void) | |
305 | { | |
306 | int i, cards = 0; | |
307 | ||
308 | if (!request_region(L4_PORT, 1, "lightning")) | |
6a89bc00 | 309 | return -EBUSY; |
1da177e4 LT |
310 | |
311 | for (i = 0; i < 2; i++) | |
312 | if (l4_add_card(i) == 0) | |
313 | cards++; | |
314 | ||
315 | outb(L4_SELECT_ANALOG, L4_PORT); | |
316 | ||
317 | if (!cards) { | |
318 | release_region(L4_PORT, 1); | |
6a89bc00 | 319 | return -ENODEV; |
1da177e4 LT |
320 | } |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static void __exit l4_exit(void) | |
326 | { | |
327 | int i; | |
328 | int cal[4] = { 59, 59, 59, 59 }; | |
329 | ||
330 | for (i = 0; i < 8; i++) | |
331 | if (l4_ports[i].gameport) { | |
332 | l4_setcal(l4_ports[i].port, cal); | |
333 | gameport_unregister_port(l4_ports[i].gameport); | |
334 | } | |
335 | ||
336 | outb(L4_SELECT_ANALOG, L4_PORT); | |
337 | release_region(L4_PORT, 1); | |
338 | } | |
339 | ||
340 | module_init(l4_init); | |
341 | module_exit(l4_exit); |