1 /*
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>
33 #include <linux/init.h>
34 #include <linux/gameport.h>
35 #include <linux/input.h>
36 #include <linux/jiffies.h>
37
38 #define DRIVER_DESC "Guillemot Digital joystick driver"
39
40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
41 MODULE_DESCRIPTION(DRIVER_DESC);
42 MODULE_LICENSE("GPL");
43
44 #define GUILLEMOT_MAX_START 600 /* 600 us */
45 #define GUILLEMOT_MAX_STROBE 60 /* 60 us */
46 #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */
47
48 static short guillemot_abs_pad[] =
49 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
50
51 static short guillemot_btn_pad[] =
52 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
53
54 static struct {
55 int x;
56 int y;
57 } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
58
59 struct guillemot_type {
60 unsigned char id;
61 short *abs;
62 short *btn;
63 int hat;
64 char *name;
65 };
66
67 struct guillemot {
68 struct gameport *gameport;
69 struct input_dev *dev;
70 int bads;
71 int reads;
72 struct guillemot_type *type;
73 unsigned char length;
74 char phys[32];
75 };
76
77 static struct guillemot_type guillemot_type[] = {
78 { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
79 { 0 }};
80
81 /*
82 * guillemot_read_packet() reads Guillemot joystick data.
83 */
84
85 static int guillemot_read_packet(struct gameport *gameport, u8 *data)
86 {
87 unsigned long flags;
88 unsigned char u, v;
89 unsigned int t, s;
90 int i;
91
92 for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
93 data[i] = 0;
94
95 i = 0;
96 t = gameport_time(gameport, GUILLEMOT_MAX_START);
97 s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
98
99 local_irq_save(flags);
100 gameport_trigger(gameport);
101 v = gameport_read(gameport);
102
103 while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
104 t--;
105 u = v; v = gameport_read(gameport);
106 if (v & ~u & 0x10) {
107 data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
108 i++;
109 t = s;
110 }
111 }
112
113 local_irq_restore(flags);
114
115 return i;
116 }
117
118 /*
119 * guillemot_poll() reads and analyzes Guillemot joystick data.
120 */
121
122 static void guillemot_poll(struct gameport *gameport)
123 {
124 struct guillemot *guillemot = gameport_get_drvdata(gameport);
125 struct input_dev *dev = guillemot->dev;
126 u8 data[GUILLEMOT_MAX_LENGTH];
127 int i;
128
129 guillemot->reads++;
130
131 if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
132 data[0] != 0x55 || data[16] != 0xaa) {
133 guillemot->bads++;
134 } else {
135
136 for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
137 input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
138
139 if (guillemot->type->hat) {
140 input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
141 input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
142 }
143
144 for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
145 input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
146 }
147
148 input_sync(dev);
149 }
150
151 /*
152 * guillemot_open() is a callback from the input open routine.
153 */
154
155 static int guillemot_open(struct input_dev *dev)
156 {
157 struct guillemot *guillemot = input_get_drvdata(dev);
158
159 gameport_start_polling(guillemot->gameport);
160 return 0;
161 }
162
163 /*
164 * guillemot_close() is a callback from the input close routine.
165 */
166
167 static void guillemot_close(struct input_dev *dev)
168 {
169 struct guillemot *guillemot = input_get_drvdata(dev);
170
171 gameport_stop_polling(guillemot->gameport);
172 }
173
174 /*
175 * guillemot_connect() probes for Guillemot joysticks.
176 */
177
178 static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
179 {
180 struct guillemot *guillemot;
181 struct input_dev *input_dev;
182 u8 data[GUILLEMOT_MAX_LENGTH];
183 int i, t;
184 int err;
185
186 guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
187 input_dev = input_allocate_device();
188 if (!guillemot || !input_dev) {
189 err = -ENOMEM;
190 goto fail1;
191 }
192
193 guillemot->gameport = gameport;
194 guillemot->dev = input_dev;
195
196 gameport_set_drvdata(gameport, guillemot);
197
198 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
199 if (err)
200 goto fail1;
201
202 i = guillemot_read_packet(gameport, data);
203
204 if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
205 err = -ENODEV;
206 goto fail2;
207 }
208
209 for (i = 0; guillemot_type[i].name; i++)
210 if (guillemot_type[i].id == data[11])
211 break;
212
213 if (!guillemot_type[i].name) {
214 printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
215 gameport->phys, data[12], data[13], data[11], data[14], data[15]);
216 err = -ENODEV;
217 goto fail2;
218 }
219
220 gameport_set_poll_handler(gameport, guillemot_poll);
221 gameport_set_poll_interval(gameport, 20);
222
223 snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
224 guillemot->type = guillemot_type + i;
225
226 input_dev->name = guillemot_type[i].name;
227 input_dev->phys = guillemot->phys;
228 input_dev->id.bustype = BUS_GAMEPORT;
229 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
230 input_dev->id.product = guillemot_type[i].id;
231 input_dev->id.version = (int)data[14] << 8 | data[15];
232 input_dev->dev.parent = &gameport->dev;
233
234 input_set_drvdata(input_dev, guillemot);
235
236 input_dev->open = guillemot_open;
237 input_dev->close = guillemot_close;
238
239 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
240
241 for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
242 input_set_abs_params(input_dev, t, 0, 255, 0, 0);
243
244 if (guillemot->type->hat) {
245 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
246 input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
247 }
248
249 for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
250 set_bit(t, input_dev->keybit);
251
252 err = input_register_device(guillemot->dev);
253 if (err)
254 goto fail2;
255
256 return 0;
257
258 fail2: gameport_close(gameport);
259 fail1: gameport_set_drvdata(gameport, NULL);
260 input_free_device(input_dev);
261 kfree(guillemot);
262 return err;
263 }
264
265 static void guillemot_disconnect(struct gameport *gameport)
266 {
267 struct guillemot *guillemot = gameport_get_drvdata(gameport);
268
269 printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
270 input_unregister_device(guillemot->dev);
271 gameport_close(gameport);
272 kfree(guillemot);
273 }
274
275 static struct gameport_driver guillemot_drv = {
276 .driver = {
277 .name = "guillemot",
278 },
279 .description = DRIVER_DESC,
280 .connect = guillemot_connect,
281 .disconnect = guillemot_disconnect,
282 };
283
284 static int __init guillemot_init(void)
285 {
286 return gameport_register_driver(&guillemot_drv);
287 }
288
289 static void __exit guillemot_exit(void)
290 {
291 gameport_unregister_driver(&guillemot_drv);
292 }
293
294 module_init(guillemot_init);
295 module_exit(guillemot_exit);
296
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