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13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/gameport.h>
18#include <linux/input.h>
19#include <linux/jiffies.h>
20
21#define DRIVER_DESC "Guillemot Digital joystick driver"
22
23MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24MODULE_DESCRIPTION(DRIVER_DESC);
25MODULE_LICENSE("GPL");
26
27#define GUILLEMOT_MAX_START 600
28#define GUILLEMOT_MAX_STROBE 60
29#define GUILLEMOT_MAX_LENGTH 17
30
31static short guillemot_abs_pad[] =
32 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
33
34static short guillemot_btn_pad[] =
35 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
36
37static struct {
38 int x;
39 int y;
40} guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
41
42struct guillemot_type {
43 unsigned char id;
44 short *abs;
45 short *btn;
46 int hat;
47 char *name;
48};
49
50struct guillemot {
51 struct gameport *gameport;
52 struct input_dev *dev;
53 int bads;
54 int reads;
55 struct guillemot_type *type;
56 unsigned char length;
57 char phys[32];
58};
59
60static struct guillemot_type guillemot_type[] = {
61 { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
62 { 0 }};
63
64
65
66
67
68static int guillemot_read_packet(struct gameport *gameport, u8 *data)
69{
70 unsigned long flags;
71 unsigned char u, v;
72 unsigned int t, s;
73 int i;
74
75 for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
76 data[i] = 0;
77
78 i = 0;
79 t = gameport_time(gameport, GUILLEMOT_MAX_START);
80 s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
81
82 local_irq_save(flags);
83 gameport_trigger(gameport);
84 v = gameport_read(gameport);
85
86 while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
87 t--;
88 u = v; v = gameport_read(gameport);
89 if (v & ~u & 0x10) {
90 data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
91 i++;
92 t = s;
93 }
94 }
95
96 local_irq_restore(flags);
97
98 return i;
99}
100
101
102
103
104
105static void guillemot_poll(struct gameport *gameport)
106{
107 struct guillemot *guillemot = gameport_get_drvdata(gameport);
108 struct input_dev *dev = guillemot->dev;
109 u8 data[GUILLEMOT_MAX_LENGTH];
110 int i;
111
112 guillemot->reads++;
113
114 if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
115 data[0] != 0x55 || data[16] != 0xaa) {
116 guillemot->bads++;
117 } else {
118
119 for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
120 input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
121
122 if (guillemot->type->hat) {
123 input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
124 input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
125 }
126
127 for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
128 input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
129 }
130
131 input_sync(dev);
132}
133
134
135
136
137
138static int guillemot_open(struct input_dev *dev)
139{
140 struct guillemot *guillemot = input_get_drvdata(dev);
141
142 gameport_start_polling(guillemot->gameport);
143 return 0;
144}
145
146
147
148
149
150static void guillemot_close(struct input_dev *dev)
151{
152 struct guillemot *guillemot = input_get_drvdata(dev);
153
154 gameport_stop_polling(guillemot->gameport);
155}
156
157
158
159
160
161static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
162{
163 struct guillemot *guillemot;
164 struct input_dev *input_dev;
165 u8 data[GUILLEMOT_MAX_LENGTH];
166 int i, t;
167 int err;
168
169 guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
170 input_dev = input_allocate_device();
171 if (!guillemot || !input_dev) {
172 err = -ENOMEM;
173 goto fail1;
174 }
175
176 guillemot->gameport = gameport;
177 guillemot->dev = input_dev;
178
179 gameport_set_drvdata(gameport, guillemot);
180
181 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
182 if (err)
183 goto fail1;
184
185 i = guillemot_read_packet(gameport, data);
186
187 if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
188 err = -ENODEV;
189 goto fail2;
190 }
191
192 for (i = 0; guillemot_type[i].name; i++)
193 if (guillemot_type[i].id == data[11])
194 break;
195
196 if (!guillemot_type[i].name) {
197 printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
198 gameport->phys, data[12], data[13], data[11], data[14], data[15]);
199 err = -ENODEV;
200 goto fail2;
201 }
202
203 gameport_set_poll_handler(gameport, guillemot_poll);
204 gameport_set_poll_interval(gameport, 20);
205
206 snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
207 guillemot->type = guillemot_type + i;
208
209 input_dev->name = guillemot_type[i].name;
210 input_dev->phys = guillemot->phys;
211 input_dev->id.bustype = BUS_GAMEPORT;
212 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
213 input_dev->id.product = guillemot_type[i].id;
214 input_dev->id.version = (int)data[14] << 8 | data[15];
215 input_dev->dev.parent = &gameport->dev;
216
217 input_set_drvdata(input_dev, guillemot);
218
219 input_dev->open = guillemot_open;
220 input_dev->close = guillemot_close;
221
222 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
223
224 for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
225 input_set_abs_params(input_dev, t, 0, 255, 0, 0);
226
227 if (guillemot->type->hat) {
228 input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
229 input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
230 }
231
232 for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
233 set_bit(t, input_dev->keybit);
234
235 err = input_register_device(guillemot->dev);
236 if (err)
237 goto fail2;
238
239 return 0;
240
241fail2: gameport_close(gameport);
242fail1: gameport_set_drvdata(gameport, NULL);
243 input_free_device(input_dev);
244 kfree(guillemot);
245 return err;
246}
247
248static void guillemot_disconnect(struct gameport *gameport)
249{
250 struct guillemot *guillemot = gameport_get_drvdata(gameport);
251
252 printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
253 input_unregister_device(guillemot->dev);
254 gameport_close(gameport);
255 kfree(guillemot);
256}
257
258static struct gameport_driver guillemot_drv = {
259 .driver = {
260 .name = "guillemot",
261 },
262 .description = DRIVER_DESC,
263 .connect = guillemot_connect,
264 .disconnect = guillemot_disconnect,
265};
266
267module_gameport_driver(guillemot_drv);
268
