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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#include <linux/jiffies.h>
39
40#define DRIVER_DESC "Guillemot Digital joystick driver"
41
42MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43MODULE_DESCRIPTION(DRIVER_DESC);
44MODULE_LICENSE("GPL");
45
46#define GUILLEMOT_MAX_START 600
47#define GUILLEMOT_MAX_STROBE 60
48#define GUILLEMOT_MAX_LENGTH 17
49
50static short guillemot_abs_pad[] =
51 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
52
53static 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
56static 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
61struct guillemot_type {
62 unsigned char id;
63 short *abs;
64 short *btn;
65 int hat;
66 char *name;
67};
68
69struct guillemot {
70 struct gameport *gameport;
71 struct input_dev *dev;
72 int bads;
73 int reads;
74 struct guillemot_type *type;
75 unsigned char length;
76 char phys[32];
77};
78
79static struct guillemot_type guillemot_type[] = {
80 { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
81 { 0 }};
82
83
84
85
86
87static 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
122
123
124static void guillemot_poll(struct gameport *gameport)
125{
126 struct guillemot *guillemot = gameport_get_drvdata(gameport);
127 struct input_dev *dev = guillemot->dev;
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
155
156
157static int guillemot_open(struct input_dev *dev)
158{
159 struct guillemot *guillemot = input_get_drvdata(dev);
160
161 gameport_start_polling(guillemot->gameport);
162 return 0;
163}
164
165
166
167
168
169static void guillemot_close(struct input_dev *dev)
170{
171 struct guillemot *guillemot = input_get_drvdata(dev);
172
173 gameport_stop_polling(guillemot->gameport);
174}
175
176
177
178
179
180static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
181{
182 struct guillemot *guillemot;
183 struct input_dev *input_dev;
184 u8 data[GUILLEMOT_MAX_LENGTH];
185 int i, t;
186 int err;
187
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 }
194
195 guillemot->gameport = gameport;
196 guillemot->dev = input_dev;
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
225 snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
226 guillemot->type = guillemot_type + i;
227
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];
234 input_dev->dev.parent = &gameport->dev;
235
236 input_set_drvdata(input_dev, guillemot);
237
238 input_dev->open = guillemot_open;
239 input_dev->close = guillemot_close;
240
241 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
242
243 for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
244 input_set_abs_params(input_dev, t, 0, 255, 0, 0);
245
246 if (guillemot->type->hat) {
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);
249 }
250
251 for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
252 set_bit(t, input_dev->keybit);
253
254 err = input_register_device(guillemot->dev);
255 if (err)
256 goto fail2;
257
258 return 0;
259
260fail2: gameport_close(gameport);
261fail1: gameport_set_drvdata(gameport, NULL);
262 input_free_device(input_dev);
263 kfree(guillemot);
264 return err;
265}
266
267static 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);
272 input_unregister_device(guillemot->dev);
273 gameport_close(gameport);
274 kfree(guillemot);
275}
276
277static 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
286static int __init guillemot_init(void)
287{
288 gameport_register_driver(&guillemot_drv);
289 return 0;
290}
291
292static void __exit guillemot_exit(void)
293{
294 gameport_unregister_driver(&guillemot_drv);
295}
296
297module_init(guillemot_init);
298module_exit(guillemot_exit);
299
