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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 Vojtech Pavlik |
3 | */ | |
4 | ||
5 | /* | |
6 | * Guillemot Digital Interface Protocol 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 <linux/kernel.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/delay.h> | |
1da177e4 LT |
33 | #include <linux/gameport.h> |
34 | #include <linux/input.h> | |
4e57b681 | 35 | #include <linux/jiffies.h> |
1da177e4 LT |
36 | |
37 | #define DRIVER_DESC "Guillemot Digital joystick driver" | |
38 | ||
39 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); | |
40 | MODULE_DESCRIPTION(DRIVER_DESC); | |
41 | MODULE_LICENSE("GPL"); | |
42 | ||
43 | #define GUILLEMOT_MAX_START 600 /* 600 us */ | |
44 | #define GUILLEMOT_MAX_STROBE 60 /* 60 us */ | |
45 | #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */ | |
46 | ||
47 | static short guillemot_abs_pad[] = | |
48 | { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 }; | |
49 | ||
50 | static short guillemot_btn_pad[] = | |
51 | { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 }; | |
52 | ||
53 | static struct { | |
54 | int x; | |
55 | int y; | |
56 | } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; | |
57 | ||
58 | struct guillemot_type { | |
59 | unsigned char id; | |
60 | short *abs; | |
61 | short *btn; | |
62 | int hat; | |
63 | char *name; | |
64 | }; | |
65 | ||
66 | struct guillemot { | |
67 | struct gameport *gameport; | |
17dd3f0f | 68 | struct input_dev *dev; |
1da177e4 LT |
69 | int bads; |
70 | int reads; | |
71 | struct guillemot_type *type; | |
72 | unsigned char length; | |
73 | char phys[32]; | |
74 | }; | |
75 | ||
76 | static struct guillemot_type guillemot_type[] = { | |
77 | { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" }, | |
78 | { 0 }}; | |
79 | ||
80 | /* | |
81 | * guillemot_read_packet() reads Guillemot joystick data. | |
82 | */ | |
83 | ||
84 | static int guillemot_read_packet(struct gameport *gameport, u8 *data) | |
85 | { | |
86 | unsigned long flags; | |
87 | unsigned char u, v; | |
88 | unsigned int t, s; | |
89 | int i; | |
90 | ||
91 | for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++) | |
92 | data[i] = 0; | |
93 | ||
94 | i = 0; | |
95 | t = gameport_time(gameport, GUILLEMOT_MAX_START); | |
96 | s = gameport_time(gameport, GUILLEMOT_MAX_STROBE); | |
97 | ||
98 | local_irq_save(flags); | |
99 | gameport_trigger(gameport); | |
100 | v = gameport_read(gameport); | |
101 | ||
102 | while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) { | |
103 | t--; | |
104 | u = v; v = gameport_read(gameport); | |
105 | if (v & ~u & 0x10) { | |
106 | data[i >> 3] |= ((v >> 5) & 1) << (i & 7); | |
107 | i++; | |
108 | t = s; | |
109 | } | |
110 | } | |
111 | ||
112 | local_irq_restore(flags); | |
113 | ||
114 | return i; | |
115 | } | |
116 | ||
117 | /* | |
118 | * guillemot_poll() reads and analyzes Guillemot joystick data. | |
119 | */ | |
120 | ||
121 | static void guillemot_poll(struct gameport *gameport) | |
122 | { | |
123 | struct guillemot *guillemot = gameport_get_drvdata(gameport); | |
17dd3f0f | 124 | struct input_dev *dev = guillemot->dev; |
1da177e4 LT |
125 | u8 data[GUILLEMOT_MAX_LENGTH]; |
126 | int i; | |
127 | ||
128 | guillemot->reads++; | |
129 | ||
130 | if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 || | |
131 | data[0] != 0x55 || data[16] != 0xaa) { | |
132 | guillemot->bads++; | |
133 | } else { | |
134 | ||
135 | for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++) | |
136 | input_report_abs(dev, guillemot->type->abs[i], data[i + 5]); | |
137 | ||
138 | if (guillemot->type->hat) { | |
139 | input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x); | |
140 | input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y); | |
141 | } | |
142 | ||
143 | for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++) | |
144 | input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1); | |
145 | } | |
146 | ||
147 | input_sync(dev); | |
148 | } | |
149 | ||
150 | /* | |
151 | * guillemot_open() is a callback from the input open routine. | |
152 | */ | |
153 | ||
154 | static int guillemot_open(struct input_dev *dev) | |
155 | { | |
8715c1cf | 156 | struct guillemot *guillemot = input_get_drvdata(dev); |
1da177e4 LT |
157 | |
158 | gameport_start_polling(guillemot->gameport); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | /* | |
163 | * guillemot_close() is a callback from the input close routine. | |
164 | */ | |
165 | ||
166 | static void guillemot_close(struct input_dev *dev) | |
167 | { | |
8715c1cf | 168 | struct guillemot *guillemot = input_get_drvdata(dev); |
1da177e4 LT |
169 | |
170 | gameport_stop_polling(guillemot->gameport); | |
171 | } | |
172 | ||
173 | /* | |
174 | * guillemot_connect() probes for Guillemot joysticks. | |
175 | */ | |
176 | ||
177 | static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv) | |
178 | { | |
179 | struct guillemot *guillemot; | |
17dd3f0f | 180 | struct input_dev *input_dev; |
1da177e4 LT |
181 | u8 data[GUILLEMOT_MAX_LENGTH]; |
182 | int i, t; | |
183 | int err; | |
184 | ||
17dd3f0f DT |
185 | guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL); |
186 | input_dev = input_allocate_device(); | |
187 | if (!guillemot || !input_dev) { | |
188 | err = -ENOMEM; | |
189 | goto fail1; | |
190 | } | |
1da177e4 LT |
191 | |
192 | guillemot->gameport = gameport; | |
17dd3f0f | 193 | guillemot->dev = input_dev; |
1da177e4 LT |
194 | |
195 | gameport_set_drvdata(gameport, guillemot); | |
196 | ||
197 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); | |
198 | if (err) | |
199 | goto fail1; | |
200 | ||
201 | i = guillemot_read_packet(gameport, data); | |
202 | ||
203 | if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) { | |
204 | err = -ENODEV; | |
205 | goto fail2; | |
206 | } | |
207 | ||
208 | for (i = 0; guillemot_type[i].name; i++) | |
209 | if (guillemot_type[i].id == data[11]) | |
210 | break; | |
211 | ||
212 | if (!guillemot_type[i].name) { | |
213 | printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n", | |
214 | gameport->phys, data[12], data[13], data[11], data[14], data[15]); | |
215 | err = -ENODEV; | |
216 | goto fail2; | |
217 | } | |
218 | ||
219 | gameport_set_poll_handler(gameport, guillemot_poll); | |
220 | gameport_set_poll_interval(gameport, 20); | |
221 | ||
10ca4c0a | 222 | snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys); |
1da177e4 LT |
223 | guillemot->type = guillemot_type + i; |
224 | ||
17dd3f0f DT |
225 | input_dev->name = guillemot_type[i].name; |
226 | input_dev->phys = guillemot->phys; | |
227 | input_dev->id.bustype = BUS_GAMEPORT; | |
228 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT; | |
229 | input_dev->id.product = guillemot_type[i].id; | |
230 | input_dev->id.version = (int)data[14] << 8 | data[15]; | |
935e658e | 231 | input_dev->dev.parent = &gameport->dev; |
8715c1cf DT |
232 | |
233 | input_set_drvdata(input_dev, guillemot); | |
1da177e4 | 234 | |
17dd3f0f DT |
235 | input_dev->open = guillemot_open; |
236 | input_dev->close = guillemot_close; | |
1da177e4 | 237 | |
7b19ada2 | 238 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
1da177e4 LT |
239 | |
240 | for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++) | |
17dd3f0f | 241 | input_set_abs_params(input_dev, t, 0, 255, 0, 0); |
1da177e4 LT |
242 | |
243 | if (guillemot->type->hat) { | |
17dd3f0f DT |
244 | input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0); |
245 | input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0); | |
1da177e4 LT |
246 | } |
247 | ||
248 | for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++) | |
17dd3f0f | 249 | set_bit(t, input_dev->keybit); |
1da177e4 | 250 | |
127278ce DT |
251 | err = input_register_device(guillemot->dev); |
252 | if (err) | |
253 | goto fail2; | |
1da177e4 LT |
254 | |
255 | return 0; | |
256 | ||
257 | fail2: gameport_close(gameport); | |
258 | fail1: gameport_set_drvdata(gameport, NULL); | |
17dd3f0f | 259 | input_free_device(input_dev); |
1da177e4 LT |
260 | kfree(guillemot); |
261 | return err; | |
262 | } | |
263 | ||
264 | static void guillemot_disconnect(struct gameport *gameport) | |
265 | { | |
266 | struct guillemot *guillemot = gameport_get_drvdata(gameport); | |
267 | ||
268 | printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys); | |
17dd3f0f | 269 | input_unregister_device(guillemot->dev); |
1da177e4 LT |
270 | gameport_close(gameport); |
271 | kfree(guillemot); | |
272 | } | |
273 | ||
274 | static struct gameport_driver guillemot_drv = { | |
275 | .driver = { | |
276 | .name = "guillemot", | |
277 | }, | |
278 | .description = DRIVER_DESC, | |
279 | .connect = guillemot_connect, | |
280 | .disconnect = guillemot_disconnect, | |
281 | }; | |
282 | ||
98a84131 | 283 | module_gameport_driver(guillemot_drv); |