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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [input/] [joystick/] [guillemot.c] - Blame information for rev 65

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1 62 marcus.erl
/*
2
 * $Id: guillemot.c,v 1.10 2002/01/22 20:28:12 vojtech Exp $
3
 *
4
 *  Copyright (c) 2001 Vojtech Pavlik
5
 */
6
 
7
/*
8
 * Guillemot Digital Interface Protocol driver for Linux
9
 */
10
 
11
/*
12
 * This program is free software; you can redistribute it and/or modify
13
 * it under the terms of the GNU General Public License as published by
14
 * the Free Software Foundation; either version 2 of the License, or
15
 * (at your option) any later version.
16
 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
21
 *
22
 * You should have received a copy of the GNU General Public License
23
 * along with this program; if not, write to the Free Software
24
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25
 *
26
 * Should you need to contact me, the author, you can do so either by
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 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
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 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
29
 */
30
 
31
#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/gameport.h>
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#include <linux/input.h>
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#include <linux/jiffies.h>
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40
#define DRIVER_DESC     "Guillemot Digital joystick driver"
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42
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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46
#define GUILLEMOT_MAX_START     600     /* 600 us */
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#define GUILLEMOT_MAX_STROBE    60      /* 60 us */
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#define GUILLEMOT_MAX_LENGTH    17      /* 17 bytes */
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50
static short guillemot_abs_pad[] =
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        { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
52
 
53
static short guillemot_btn_pad[] =
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        { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
55
 
56
static struct {
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        int x;
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        int y;
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} guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
60
 
61
struct guillemot_type {
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        unsigned char id;
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        short *abs;
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        short *btn;
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        int hat;
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        char *name;
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};
68
 
69
struct guillemot {
70
        struct gameport *gameport;
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        struct input_dev *dev;
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        int bads;
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        int reads;
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        struct guillemot_type *type;
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        unsigned char length;
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        char phys[32];
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};
78
 
79
static struct guillemot_type guillemot_type[] = {
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        { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
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        { 0 }};
82
 
83
/*
84
 * guillemot_read_packet() reads Guillemot joystick data.
85
 */
86
 
87
static 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++)
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                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
 * guillemot_poll() reads and analyzes Guillemot joystick data.
122
 */
123
 
124
static 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
 * guillemot_open() is a callback from the input open routine.
155
 */
156
 
157
static 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
 * guillemot_close() is a callback from the input close routine.
167
 */
168
 
169
static 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
 * guillemot_connect() probes for Guillemot joysticks.
178
 */
179
 
180
static 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
 
260
fail2:  gameport_close(gameport);
261
fail1:  gameport_set_drvdata(gameport, NULL);
262
        input_free_device(input_dev);
263
        kfree(guillemot);
264
        return err;
265
}
266
 
267
static 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
 
277
static 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
 
286
static int __init guillemot_init(void)
287
{
288
        gameport_register_driver(&guillemot_drv);
289
        return 0;
290
}
291
 
292
static void __exit guillemot_exit(void)
293
{
294
        gameport_unregister_driver(&guillemot_drv);
295
}
296
 
297
module_init(guillemot_init);
298
module_exit(guillemot_exit);

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