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29#include <linux/kernel.h>
30#include <linux/slab.h>
31#include <linux/module.h>
32#include <linux/delay.h>
33#include <linux/gameport.h>
34#include <linux/input.h>
35#include <linux/jiffies.h>
36
37#define DRIVER_DESC "Guillemot Digital joystick driver"
38
39MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40MODULE_DESCRIPTION(DRIVER_DESC);
41MODULE_LICENSE("GPL");
42
43#define GUILLEMOT_MAX_START 600
44#define GUILLEMOT_MAX_STROBE 60
45#define GUILLEMOT_MAX_LENGTH 17
46
47static short guillemot_abs_pad[] =
48 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
49
50static 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
53static 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
58struct guillemot_type {
59 unsigned char id;
60 short *abs;
61 short *btn;
62 int hat;
63 char *name;
64};
65
66struct guillemot {
67 struct gameport *gameport;
68 struct input_dev *dev;
69 int bads;
70 int reads;
71 struct guillemot_type *type;
72 unsigned char length;
73 char phys[32];
74};
75
76static struct guillemot_type guillemot_type[] = {
77 { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
78 { 0 }};
79
80
81
82
83
84static 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
119
120
121static void guillemot_poll(struct gameport *gameport)
122{
123 struct guillemot *guillemot = gameport_get_drvdata(gameport);
124 struct input_dev *dev = guillemot->dev;
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
152
153
154static int guillemot_open(struct input_dev *dev)
155{
156 struct guillemot *guillemot = input_get_drvdata(dev);
157
158 gameport_start_polling(guillemot->gameport);
159 return 0;
160}
161
162
163
164
165
166static void guillemot_close(struct input_dev *dev)
167{
168 struct guillemot *guillemot = input_get_drvdata(dev);
169
170 gameport_stop_polling(guillemot->gameport);
171}
172
173
174
175
176
177static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
178{
179 struct guillemot *guillemot;
180 struct input_dev *input_dev;
181 u8 data[GUILLEMOT_MAX_LENGTH];
182 int i, t;
183 int err;
184
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 }
191
192 guillemot->gameport = gameport;
193 guillemot->dev = input_dev;
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
222 snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
223 guillemot->type = guillemot_type + i;
224
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];
231 input_dev->dev.parent = &gameport->dev;
232
233 input_set_drvdata(input_dev, guillemot);
234
235 input_dev->open = guillemot_open;
236 input_dev->close = guillemot_close;
237
238 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
239
240 for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
241 input_set_abs_params(input_dev, t, 0, 255, 0, 0);
242
243 if (guillemot->type->hat) {
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);
246 }
247
248 for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
249 set_bit(t, input_dev->keybit);
250
251 err = input_register_device(guillemot->dev);
252 if (err)
253 goto fail2;
254
255 return 0;
256
257fail2: gameport_close(gameport);
258fail1: gameport_set_drvdata(gameport, NULL);
259 input_free_device(input_dev);
260 kfree(guillemot);
261 return err;
262}
263
264static 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);
269 input_unregister_device(guillemot->dev);
270 gameport_close(gameport);
271 kfree(guillemot);
272}
273
274static 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
283module_gameport_driver(guillemot_drv);
284
