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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> | |
38 | ||
39 | #define DRIVER_DESC "Guillemot Digital joystick driver" | |
40 | ||
41 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
42 | MODULE_DESCRIPTION(DRIVER_DESC); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
45 | #define GUILLEMOT_MAX_START 600 /* 600 us */ | |
46 | #define GUILLEMOT_MAX_STROBE 60 /* 60 us */ | |
47 | #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */ | |
48 | ||
49 | static short guillemot_abs_pad[] = | |
50 | { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 }; | |
51 | ||
52 | static short guillemot_btn_pad[] = | |
53 | { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 }; | |
54 | ||
55 | static struct { | |
56 | int x; | |
57 | int y; | |
58 | } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; | |
59 | ||
60 | struct guillemot_type { | |
61 | unsigned char id; | |
62 | short *abs; | |
63 | short *btn; | |
64 | int hat; | |
65 | char *name; | |
66 | }; | |
67 | ||
68 | struct guillemot { | |
69 | struct gameport *gameport; | |
70 | struct input_dev dev; | |
71 | int bads; | |
72 | int reads; | |
73 | struct guillemot_type *type; | |
74 | unsigned char length; | |
75 | char phys[32]; | |
76 | }; | |
77 | ||
78 | static struct guillemot_type guillemot_type[] = { | |
79 | { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" }, | |
80 | { 0 }}; | |
81 | ||
82 | /* | |
83 | * guillemot_read_packet() reads Guillemot joystick data. | |
84 | */ | |
85 | ||
86 | static int guillemot_read_packet(struct gameport *gameport, u8 *data) | |
87 | { | |
88 | unsigned long flags; | |
89 | unsigned char u, v; | |
90 | unsigned int t, s; | |
91 | int i; | |
92 | ||
93 | for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++) | |
94 | data[i] = 0; | |
95 | ||
96 | i = 0; | |
97 | t = gameport_time(gameport, GUILLEMOT_MAX_START); | |
98 | s = gameport_time(gameport, GUILLEMOT_MAX_STROBE); | |
99 | ||
100 | local_irq_save(flags); | |
101 | gameport_trigger(gameport); | |
102 | v = gameport_read(gameport); | |
103 | ||
104 | while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) { | |
105 | t--; | |
106 | u = v; v = gameport_read(gameport); | |
107 | if (v & ~u & 0x10) { | |
108 | data[i >> 3] |= ((v >> 5) & 1) << (i & 7); | |
109 | i++; | |
110 | t = s; | |
111 | } | |
112 | } | |
113 | ||
114 | local_irq_restore(flags); | |
115 | ||
116 | return i; | |
117 | } | |
118 | ||
119 | /* | |
120 | * guillemot_poll() reads and analyzes Guillemot joystick data. | |
121 | */ | |
122 | ||
123 | static void guillemot_poll(struct gameport *gameport) | |
124 | { | |
125 | struct guillemot *guillemot = gameport_get_drvdata(gameport); | |
126 | struct input_dev *dev = &guillemot->dev; | |
127 | u8 data[GUILLEMOT_MAX_LENGTH]; | |
128 | int i; | |
129 | ||
130 | guillemot->reads++; | |
131 | ||
132 | if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 || | |
133 | data[0] != 0x55 || data[16] != 0xaa) { | |
134 | guillemot->bads++; | |
135 | } else { | |
136 | ||
137 | for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++) | |
138 | input_report_abs(dev, guillemot->type->abs[i], data[i + 5]); | |
139 | ||
140 | if (guillemot->type->hat) { | |
141 | input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x); | |
142 | input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y); | |
143 | } | |
144 | ||
145 | for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++) | |
146 | input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1); | |
147 | } | |
148 | ||
149 | input_sync(dev); | |
150 | } | |
151 | ||
152 | /* | |
153 | * guillemot_open() is a callback from the input open routine. | |
154 | */ | |
155 | ||
156 | static int guillemot_open(struct input_dev *dev) | |
157 | { | |
158 | struct guillemot *guillemot = dev->private; | |
159 | ||
160 | gameport_start_polling(guillemot->gameport); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | /* | |
165 | * guillemot_close() is a callback from the input close routine. | |
166 | */ | |
167 | ||
168 | static void guillemot_close(struct input_dev *dev) | |
169 | { | |
170 | struct guillemot *guillemot = dev->private; | |
171 | ||
172 | gameport_stop_polling(guillemot->gameport); | |
173 | } | |
174 | ||
175 | /* | |
176 | * guillemot_connect() probes for Guillemot joysticks. | |
177 | */ | |
178 | ||
179 | static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv) | |
180 | { | |
181 | struct guillemot *guillemot; | |
182 | u8 data[GUILLEMOT_MAX_LENGTH]; | |
183 | int i, t; | |
184 | int err; | |
185 | ||
a97e148a | 186 | if (!(guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL))) |
1da177e4 LT |
187 | return -ENOMEM; |
188 | ||
189 | guillemot->gameport = gameport; | |
190 | ||
191 | gameport_set_drvdata(gameport, guillemot); | |
192 | ||
193 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
194 | if (err) | |
195 | goto fail1; | |
196 | ||
197 | i = guillemot_read_packet(gameport, data); | |
198 | ||
199 | if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) { | |
200 | err = -ENODEV; | |
201 | goto fail2; | |
202 | } | |
203 | ||
204 | for (i = 0; guillemot_type[i].name; i++) | |
205 | if (guillemot_type[i].id == data[11]) | |
206 | break; | |
207 | ||
208 | if (!guillemot_type[i].name) { | |
209 | printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n", | |
210 | gameport->phys, data[12], data[13], data[11], data[14], data[15]); | |
211 | err = -ENODEV; | |
212 | goto fail2; | |
213 | } | |
214 | ||
215 | gameport_set_poll_handler(gameport, guillemot_poll); | |
216 | gameport_set_poll_interval(gameport, 20); | |
217 | ||
218 | sprintf(guillemot->phys, "%s/input0", gameport->phys); | |
219 | ||
220 | guillemot->type = guillemot_type + i; | |
221 | ||
222 | guillemot->dev.private = guillemot; | |
223 | guillemot->dev.open = guillemot_open; | |
224 | guillemot->dev.close = guillemot_close; | |
225 | ||
226 | guillemot->dev.name = guillemot_type[i].name; | |
227 | guillemot->dev.phys = guillemot->phys; | |
228 | guillemot->dev.id.bustype = BUS_GAMEPORT; | |
229 | guillemot->dev.id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT; | |
230 | guillemot->dev.id.product = guillemot_type[i].id; | |
231 | guillemot->dev.id.version = (int)data[14] << 8 | data[15]; | |
232 | ||
233 | guillemot->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); | |
234 | ||
235 | for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++) | |
236 | input_set_abs_params(&guillemot->dev, t, 0, 255, 0, 0); | |
237 | ||
238 | if (guillemot->type->hat) { | |
239 | input_set_abs_params(&guillemot->dev, ABS_HAT0X, -1, 1, 0, 0); | |
240 | input_set_abs_params(&guillemot->dev, ABS_HAT0Y, -1, 1, 0, 0); | |
241 | } | |
242 | ||
243 | for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++) | |
244 | set_bit(t, guillemot->dev.keybit); | |
245 | ||
246 | input_register_device(&guillemot->dev); | |
247 | printk(KERN_INFO "input: %s ver %d.%02d on %s\n", | |
248 | guillemot->type->name, data[14], data[15], gameport->phys); | |
249 | ||
250 | return 0; | |
251 | ||
252 | fail2: gameport_close(gameport); | |
253 | fail1: gameport_set_drvdata(gameport, NULL); | |
254 | kfree(guillemot); | |
255 | return err; | |
256 | } | |
257 | ||
258 | static void guillemot_disconnect(struct gameport *gameport) | |
259 | { | |
260 | struct guillemot *guillemot = gameport_get_drvdata(gameport); | |
261 | ||
262 | printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys); | |
263 | input_unregister_device(&guillemot->dev); | |
264 | gameport_close(gameport); | |
265 | kfree(guillemot); | |
266 | } | |
267 | ||
268 | static struct gameport_driver guillemot_drv = { | |
269 | .driver = { | |
270 | .name = "guillemot", | |
271 | }, | |
272 | .description = DRIVER_DESC, | |
273 | .connect = guillemot_connect, | |
274 | .disconnect = guillemot_disconnect, | |
275 | }; | |
276 | ||
277 | static int __init guillemot_init(void) | |
278 | { | |
279 | gameport_register_driver(&guillemot_drv); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | static void __exit guillemot_exit(void) | |
284 | { | |
285 | gameport_unregister_driver(&guillemot_drv); | |
286 | } | |
287 | ||
288 | module_init(guillemot_init); | |
289 | module_exit(guillemot_exit); |