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1da177e4 LT |
1 | /* |
2 | * $Id: guillemot.c,v 1.10 2002/01/22 20:28:12 vojtech Exp $ | |
3 | * | |
4 | * Copyright (c) 2001 Vojtech Pavlik | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Guillemot Digital Interface Protocol driver for Linux | |
9 | */ | |
10 | ||
11 | /* | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * Should you need to contact me, the author, you can do so either by | |
27 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: | |
28 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic | |
29 | */ | |
30 | ||
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/gameport.h> | |
37 | #include <linux/input.h> | |
4e57b681 | 38 | #include <linux/jiffies.h> |
1da177e4 LT |
39 | |
40 | #define DRIVER_DESC "Guillemot Digital joystick driver" | |
41 | ||
42 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
43 | MODULE_DESCRIPTION(DRIVER_DESC); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
46 | #define GUILLEMOT_MAX_START 600 /* 600 us */ | |
47 | #define GUILLEMOT_MAX_STROBE 60 /* 60 us */ | |
48 | #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */ | |
49 | ||
50 | static short guillemot_abs_pad[] = | |
51 | { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 }; | |
52 | ||
53 | static short guillemot_btn_pad[] = | |
54 | { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 }; | |
55 | ||
56 | static struct { | |
57 | int x; | |
58 | int y; | |
59 | } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; | |
60 | ||
61 | struct guillemot_type { | |
62 | unsigned char id; | |
63 | short *abs; | |
64 | short *btn; | |
65 | int hat; | |
66 | char *name; | |
67 | }; | |
68 | ||
69 | struct guillemot { | |
70 | struct gameport *gameport; | |
17dd3f0f | 71 | struct input_dev *dev; |
1da177e4 LT |
72 | int bads; |
73 | int reads; | |
74 | struct guillemot_type *type; | |
75 | unsigned char length; | |
76 | char phys[32]; | |
77 | }; | |
78 | ||
79 | static struct guillemot_type guillemot_type[] = { | |
80 | { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" }, | |
81 | { 0 }}; | |
82 | ||
83 | /* | |
84 | * guillemot_read_packet() reads Guillemot joystick data. | |
85 | */ | |
86 | ||
87 | static int guillemot_read_packet(struct gameport *gameport, u8 *data) | |
88 | { | |
89 | unsigned long flags; | |
90 | unsigned char u, v; | |
91 | unsigned int t, s; | |
92 | int i; | |
93 | ||
94 | for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++) | |
95 | data[i] = 0; | |
96 | ||
97 | i = 0; | |
98 | t = gameport_time(gameport, GUILLEMOT_MAX_START); | |
99 | s = gameport_time(gameport, GUILLEMOT_MAX_STROBE); | |
100 | ||
101 | local_irq_save(flags); | |
102 | gameport_trigger(gameport); | |
103 | v = gameport_read(gameport); | |
104 | ||
105 | while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) { | |
106 | t--; | |
107 | u = v; v = gameport_read(gameport); | |
108 | if (v & ~u & 0x10) { | |
109 | data[i >> 3] |= ((v >> 5) & 1) << (i & 7); | |
110 | i++; | |
111 | t = s; | |
112 | } | |
113 | } | |
114 | ||
115 | local_irq_restore(flags); | |
116 | ||
117 | return i; | |
118 | } | |
119 | ||
120 | /* | |
121 | * guillemot_poll() reads and analyzes Guillemot joystick data. | |
122 | */ | |
123 | ||
124 | static void guillemot_poll(struct gameport *gameport) | |
125 | { | |
126 | struct guillemot *guillemot = gameport_get_drvdata(gameport); | |
17dd3f0f | 127 | struct input_dev *dev = guillemot->dev; |
1da177e4 LT |
128 | u8 data[GUILLEMOT_MAX_LENGTH]; |
129 | int i; | |
130 | ||
131 | guillemot->reads++; | |
132 | ||
133 | if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 || | |
134 | data[0] != 0x55 || data[16] != 0xaa) { | |
135 | guillemot->bads++; | |
136 | } else { | |
137 | ||
138 | for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++) | |
139 | input_report_abs(dev, guillemot->type->abs[i], data[i + 5]); | |
140 | ||
141 | if (guillemot->type->hat) { | |
142 | input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x); | |
143 | input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y); | |
144 | } | |
145 | ||
146 | for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++) | |
147 | input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1); | |
148 | } | |
149 | ||
150 | input_sync(dev); | |
151 | } | |
152 | ||
153 | /* | |
154 | * guillemot_open() is a callback from the input open routine. | |
155 | */ | |
156 | ||
157 | static int guillemot_open(struct input_dev *dev) | |
158 | { | |
8715c1cf | 159 | struct guillemot *guillemot = input_get_drvdata(dev); |
1da177e4 LT |
160 | |
161 | gameport_start_polling(guillemot->gameport); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | /* | |
166 | * guillemot_close() is a callback from the input close routine. | |
167 | */ | |
168 | ||
169 | static void guillemot_close(struct input_dev *dev) | |
170 | { | |
8715c1cf | 171 | struct guillemot *guillemot = input_get_drvdata(dev); |
1da177e4 LT |
172 | |
173 | gameport_stop_polling(guillemot->gameport); | |
174 | } | |
175 | ||
176 | /* | |
177 | * guillemot_connect() probes for Guillemot joysticks. | |
178 | */ | |
179 | ||
180 | static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv) | |
181 | { | |
182 | struct guillemot *guillemot; | |
17dd3f0f | 183 | struct input_dev *input_dev; |
1da177e4 LT |
184 | u8 data[GUILLEMOT_MAX_LENGTH]; |
185 | int i, t; | |
186 | int err; | |
187 | ||
17dd3f0f DT |
188 | guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL); |
189 | input_dev = input_allocate_device(); | |
190 | if (!guillemot || !input_dev) { | |
191 | err = -ENOMEM; | |
192 | goto fail1; | |
193 | } | |
1da177e4 LT |
194 | |
195 | guillemot->gameport = gameport; | |
17dd3f0f | 196 | guillemot->dev = input_dev; |
1da177e4 LT |
197 | |
198 | gameport_set_drvdata(gameport, guillemot); | |
199 | ||
200 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
201 | if (err) | |
202 | goto fail1; | |
203 | ||
204 | i = guillemot_read_packet(gameport, data); | |
205 | ||
206 | if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) { | |
207 | err = -ENODEV; | |
208 | goto fail2; | |
209 | } | |
210 | ||
211 | for (i = 0; guillemot_type[i].name; i++) | |
212 | if (guillemot_type[i].id == data[11]) | |
213 | break; | |
214 | ||
215 | if (!guillemot_type[i].name) { | |
216 | printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n", | |
217 | gameport->phys, data[12], data[13], data[11], data[14], data[15]); | |
218 | err = -ENODEV; | |
219 | goto fail2; | |
220 | } | |
221 | ||
222 | gameport_set_poll_handler(gameport, guillemot_poll); | |
223 | gameport_set_poll_interval(gameport, 20); | |
224 | ||
10ca4c0a | 225 | snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys); |
1da177e4 LT |
226 | guillemot->type = guillemot_type + i; |
227 | ||
17dd3f0f DT |
228 | input_dev->name = guillemot_type[i].name; |
229 | input_dev->phys = guillemot->phys; | |
230 | input_dev->id.bustype = BUS_GAMEPORT; | |
231 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT; | |
232 | input_dev->id.product = guillemot_type[i].id; | |
233 | input_dev->id.version = (int)data[14] << 8 | data[15]; | |
935e658e | 234 | input_dev->dev.parent = &gameport->dev; |
8715c1cf DT |
235 | |
236 | input_set_drvdata(input_dev, guillemot); | |
1da177e4 | 237 | |
17dd3f0f DT |
238 | input_dev->open = guillemot_open; |
239 | input_dev->close = guillemot_close; | |
1da177e4 | 240 | |
17dd3f0f | 241 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
1da177e4 LT |
242 | |
243 | for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++) | |
17dd3f0f | 244 | input_set_abs_params(input_dev, t, 0, 255, 0, 0); |
1da177e4 LT |
245 | |
246 | if (guillemot->type->hat) { | |
17dd3f0f DT |
247 | input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0); |
248 | input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0); | |
1da177e4 LT |
249 | } |
250 | ||
251 | for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++) | |
17dd3f0f | 252 | set_bit(t, input_dev->keybit); |
1da177e4 | 253 | |
127278ce DT |
254 | err = input_register_device(guillemot->dev); |
255 | if (err) | |
256 | goto fail2; | |
1da177e4 LT |
257 | |
258 | return 0; | |
259 | ||
260 | fail2: gameport_close(gameport); | |
261 | fail1: gameport_set_drvdata(gameport, NULL); | |
17dd3f0f | 262 | input_free_device(input_dev); |
1da177e4 LT |
263 | kfree(guillemot); |
264 | return err; | |
265 | } | |
266 | ||
267 | static void guillemot_disconnect(struct gameport *gameport) | |
268 | { | |
269 | struct guillemot *guillemot = gameport_get_drvdata(gameport); | |
270 | ||
271 | printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys); | |
17dd3f0f | 272 | input_unregister_device(guillemot->dev); |
1da177e4 LT |
273 | gameport_close(gameport); |
274 | kfree(guillemot); | |
275 | } | |
276 | ||
277 | static struct gameport_driver guillemot_drv = { | |
278 | .driver = { | |
279 | .name = "guillemot", | |
280 | }, | |
281 | .description = DRIVER_DESC, | |
282 | .connect = guillemot_connect, | |
283 | .disconnect = guillemot_disconnect, | |
284 | }; | |
285 | ||
286 | static int __init guillemot_init(void) | |
287 | { | |
288 | gameport_register_driver(&guillemot_drv); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static void __exit guillemot_exit(void) | |
293 | { | |
294 | gameport_unregister_driver(&guillemot_drv); | |
295 | } | |
296 | ||
297 | module_init(guillemot_init); | |
298 | module_exit(guillemot_exit); |