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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [media/] [video/] [indycam.c] - Blame information for rev 62

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Line No. Rev Author Line
1 62 marcus.erl
/*
2
 *  indycam.c - Silicon Graphics IndyCam digital camera driver
3
 *
4
 *  Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
5
 *  Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
6
 *
7
 *  This program is free software; you can redistribute it and/or modify
8
 *  it under the terms of the GNU General Public License version 2 as
9
 *  published by the Free Software Foundation.
10
 */
11
 
12
#include <linux/delay.h>
13
#include <linux/errno.h>
14
#include <linux/fs.h>
15
#include <linux/init.h>
16
#include <linux/kernel.h>
17
#include <linux/major.h>
18
#include <linux/module.h>
19
#include <linux/mm.h>
20
#include <linux/slab.h>
21
 
22
#include <linux/videodev.h>
23
/* IndyCam decodes stream of photons into digital image representation ;-) */
24
#include <linux/video_decoder.h>
25
#include <linux/i2c.h>
26
 
27
#include "indycam.h"
28
 
29
#define INDYCAM_MODULE_VERSION "0.0.5"
30
 
31
MODULE_DESCRIPTION("SGI IndyCam driver");
32
MODULE_VERSION(INDYCAM_MODULE_VERSION);
33
MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
34
MODULE_LICENSE("GPL");
35
 
36
// #define INDYCAM_DEBUG
37
 
38
#ifdef INDYCAM_DEBUG
39
#define dprintk(x...) printk("IndyCam: " x);
40
#define indycam_regdump(client) indycam_regdump_debug(client)
41
#else
42
#define dprintk(x...)
43
#define indycam_regdump(client)
44
#endif
45
 
46
struct indycam {
47
        struct i2c_client *client;
48
        u8 version;
49
};
50
 
51
static struct i2c_driver i2c_driver_indycam;
52
 
53
static const u8 initseq[] = {
54
        INDYCAM_CONTROL_AGCENA,         /* INDYCAM_CONTROL */
55
        INDYCAM_SHUTTER_60,             /* INDYCAM_SHUTTER */
56
        INDYCAM_GAIN_DEFAULT,           /* INDYCAM_GAIN */
57
        0x00,                           /* INDYCAM_BRIGHTNESS (read-only) */
58
        INDYCAM_RED_BALANCE_DEFAULT,    /* INDYCAM_RED_BALANCE */
59
        INDYCAM_BLUE_BALANCE_DEFAULT,   /* INDYCAM_BLUE_BALANCE */
60
        INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */
61
        INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */
62
};
63
 
64
/* IndyCam register handling */
65
 
66
static int indycam_read_reg(struct i2c_client *client, u8 reg, u8 *value)
67
{
68
        int ret;
69
 
70
        if (reg == INDYCAM_REG_RESET) {
71
                dprintk("indycam_read_reg(): "
72
                        "skipping write-only register %d\n", reg);
73
                *value = 0;
74
                return 0;
75
        }
76
 
77
        ret = i2c_smbus_read_byte_data(client, reg);
78
 
79
        if (ret < 0) {
80
                printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, "
81
                       "register = 0x%02x\n", reg);
82
                return ret;
83
        }
84
 
85
        *value = (u8)ret;
86
 
87
        return 0;
88
}
89
 
90
static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value)
91
{
92
        int err;
93
 
94
        if ((reg == INDYCAM_REG_BRIGHTNESS)
95
            || (reg == INDYCAM_REG_VERSION)) {
96
                dprintk("indycam_write_reg(): "
97
                        "skipping read-only register %d\n", reg);
98
                return 0;
99
        }
100
 
101
        dprintk("Writing Reg %d = 0x%02x\n", reg, value);
102
        err = i2c_smbus_write_byte_data(client, reg, value);
103
 
104
        if (err) {
105
                printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, "
106
                       "register = 0x%02x, value = 0x%02x\n", reg, value);
107
        }
108
        return err;
109
}
110
 
111
static int indycam_write_block(struct i2c_client *client, u8 reg,
112
                               u8 length, u8 *data)
113
{
114
        int i, err;
115
 
116
        for (i = 0; i < length; i++) {
117
                err = indycam_write_reg(client, reg + i, data[i]);
118
                if (err)
119
                        return err;
120
        }
121
 
122
        return 0;
123
}
124
 
125
/* Helper functions */
126
 
127
#ifdef INDYCAM_DEBUG
128
static void indycam_regdump_debug(struct i2c_client *client)
129
{
130
        int i;
131
        u8 val;
132
 
133
        for (i = 0; i < 9; i++) {
134
                indycam_read_reg(client, i, &val);
135
                dprintk("Reg %d = 0x%02x\n", i, val);
136
        }
137
}
138
#endif
139
 
140
static int indycam_get_control(struct i2c_client *client,
141
                               struct indycam_control *ctrl)
142
{
143
        struct indycam *camera = i2c_get_clientdata(client);
144
        u8 reg;
145
        int ret = 0;
146
 
147
        switch (ctrl->type) {
148
        case INDYCAM_CONTROL_AGC:
149
        case INDYCAM_CONTROL_AWB:
150
                ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
151
                if (ret)
152
                        return -EIO;
153
                if (ctrl->type == INDYCAM_CONTROL_AGC)
154
                        ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
155
                                ? 1 : 0;
156
                else
157
                        ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
158
                                ? 1 : 0;
159
                break;
160
        case INDYCAM_CONTROL_SHUTTER:
161
                ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, &reg);
162
                if (ret)
163
                        return -EIO;
164
                ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
165
                break;
166
        case INDYCAM_CONTROL_GAIN:
167
                ret = indycam_read_reg(client, INDYCAM_REG_GAIN, &reg);
168
                if (ret)
169
                        return -EIO;
170
                ctrl->value = (s32)reg;
171
                break;
172
        case INDYCAM_CONTROL_RED_BALANCE:
173
                ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, &reg);
174
                if (ret)
175
                        return -EIO;
176
                ctrl->value = (s32)reg;
177
                break;
178
        case INDYCAM_CONTROL_BLUE_BALANCE:
179
                ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, &reg);
180
                if (ret)
181
                        return -EIO;
182
                ctrl->value = (s32)reg;
183
                break;
184
        case INDYCAM_CONTROL_RED_SATURATION:
185
                ret = indycam_read_reg(client,
186
                                       INDYCAM_REG_RED_SATURATION, &reg);
187
                if (ret)
188
                        return -EIO;
189
                ctrl->value = (s32)reg;
190
                break;
191
        case INDYCAM_CONTROL_BLUE_SATURATION:
192
                ret = indycam_read_reg(client,
193
                                       INDYCAM_REG_BLUE_SATURATION, &reg);
194
                if (ret)
195
                        return -EIO;
196
                ctrl->value = (s32)reg;
197
                break;
198
        case INDYCAM_CONTROL_GAMMA:
199
                if (camera->version == CAMERA_VERSION_MOOSE) {
200
                        ret = indycam_read_reg(client,
201
                                               INDYCAM_REG_GAMMA, &reg);
202
                        if (ret)
203
                                return -EIO;
204
                        ctrl->value = (s32)reg;
205
                } else {
206
                        ctrl->value = INDYCAM_GAMMA_DEFAULT;
207
                }
208
                break;
209
        default:
210
                ret = -EINVAL;
211
        }
212
 
213
        return ret;
214
}
215
 
216
static int indycam_set_control(struct i2c_client *client,
217
                               struct indycam_control *ctrl)
218
{
219
        struct indycam *camera = i2c_get_clientdata(client);
220
        u8 reg;
221
        int ret = 0;
222
 
223
        switch (ctrl->type) {
224
        case INDYCAM_CONTROL_AGC:
225
        case INDYCAM_CONTROL_AWB:
226
                ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
227
                if (ret)
228
                        break;
229
 
230
                if (ctrl->type == INDYCAM_CONTROL_AGC) {
231
                        if (ctrl->value)
232
                                reg |= INDYCAM_CONTROL_AGCENA;
233
                        else
234
                                reg &= ~INDYCAM_CONTROL_AGCENA;
235
                } else {
236
                        if (ctrl->value)
237
                                reg |= INDYCAM_CONTROL_AWBCTL;
238
                        else
239
                                reg &= ~INDYCAM_CONTROL_AWBCTL;
240
                }
241
 
242
                ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg);
243
                break;
244
        case INDYCAM_CONTROL_SHUTTER:
245
                reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
246
                ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
247
                break;
248
        case INDYCAM_CONTROL_GAIN:
249
                ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
250
                break;
251
        case INDYCAM_CONTROL_RED_BALANCE:
252
                ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
253
                                        ctrl->value);
254
                break;
255
        case INDYCAM_CONTROL_BLUE_BALANCE:
256
                ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE,
257
                                        ctrl->value);
258
                break;
259
        case INDYCAM_CONTROL_RED_SATURATION:
260
                ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION,
261
                                        ctrl->value);
262
                break;
263
        case INDYCAM_CONTROL_BLUE_SATURATION:
264
                ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION,
265
                                        ctrl->value);
266
                break;
267
        case INDYCAM_CONTROL_GAMMA:
268
                if (camera->version == CAMERA_VERSION_MOOSE) {
269
                        ret = indycam_write_reg(client, INDYCAM_REG_GAMMA,
270
                                                ctrl->value);
271
                }
272
                break;
273
        default:
274
                ret = -EINVAL;
275
        }
276
 
277
        return ret;
278
}
279
 
280
/* I2C-interface */
281
 
282
static int indycam_attach(struct i2c_adapter *adap, int addr, int kind)
283
{
284
        int err = 0;
285
        struct indycam *camera;
286
        struct i2c_client *client;
287
 
288
        printk(KERN_INFO "SGI IndyCam driver version %s\n",
289
               INDYCAM_MODULE_VERSION);
290
 
291
        client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
292
        if (!client)
293
                return -ENOMEM;
294
        camera = kzalloc(sizeof(struct indycam), GFP_KERNEL);
295
        if (!camera) {
296
                err = -ENOMEM;
297
                goto out_free_client;
298
        }
299
 
300
        client->addr = addr;
301
        client->adapter = adap;
302
        client->driver = &i2c_driver_indycam;
303
        client->flags = 0;
304
        strcpy(client->name, "IndyCam client");
305
        i2c_set_clientdata(client, camera);
306
 
307
        camera->client = client;
308
 
309
        err = i2c_attach_client(client);
310
        if (err)
311
                goto out_free_camera;
312
 
313
        camera->version = i2c_smbus_read_byte_data(client,
314
                                                   INDYCAM_REG_VERSION);
315
        if (camera->version != CAMERA_VERSION_INDY &&
316
            camera->version != CAMERA_VERSION_MOOSE) {
317
                err = -ENODEV;
318
                goto out_detach_client;
319
        }
320
        printk(KERN_INFO "IndyCam v%d.%d detected\n",
321
               INDYCAM_VERSION_MAJOR(camera->version),
322
               INDYCAM_VERSION_MINOR(camera->version));
323
 
324
        indycam_regdump(client);
325
 
326
        // initialize
327
        err = indycam_write_block(client, 0, sizeof(initseq), (u8 *)&initseq);
328
        if (err) {
329
                printk(KERN_ERR "IndyCam initalization failed\n");
330
                err = -EIO;
331
                goto out_detach_client;
332
        }
333
 
334
        indycam_regdump(client);
335
 
336
        // white balance
337
        err = indycam_write_reg(client, INDYCAM_REG_CONTROL,
338
                          INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL);
339
        if (err) {
340
                printk(KERN_ERR "IndyCam: White balancing camera failed\n");
341
                err = -EIO;
342
                goto out_detach_client;
343
        }
344
 
345
        indycam_regdump(client);
346
 
347
        printk(KERN_INFO "IndyCam initialized\n");
348
 
349
        return 0;
350
 
351
out_detach_client:
352
        i2c_detach_client(client);
353
out_free_camera:
354
        kfree(camera);
355
out_free_client:
356
        kfree(client);
357
        return err;
358
}
359
 
360
static int indycam_probe(struct i2c_adapter *adap)
361
{
362
        /* Indy specific crap */
363
        if (adap->id == I2C_HW_SGI_VINO)
364
                return indycam_attach(adap, INDYCAM_ADDR, 0);
365
        /* Feel free to add probe here :-) */
366
        return -ENODEV;
367
}
368
 
369
static int indycam_detach(struct i2c_client *client)
370
{
371
        struct indycam *camera = i2c_get_clientdata(client);
372
 
373
        i2c_detach_client(client);
374
        kfree(camera);
375
        kfree(client);
376
        return 0;
377
}
378
 
379
static int indycam_command(struct i2c_client *client, unsigned int cmd,
380
                           void *arg)
381
{
382
        // struct indycam *camera = i2c_get_clientdata(client);
383
 
384
        /* The old video_decoder interface just isn't enough,
385
         * so we'll use some custom commands. */
386
        switch (cmd) {
387
        case DECODER_GET_CAPABILITIES: {
388
                struct video_decoder_capability *cap = arg;
389
 
390
                cap->flags  = VIDEO_DECODER_NTSC;
391
                cap->inputs = 1;
392
                cap->outputs = 1;
393
                break;
394
        }
395
        case DECODER_GET_STATUS: {
396
                int *iarg = arg;
397
 
398
                *iarg = DECODER_STATUS_GOOD | DECODER_STATUS_NTSC |
399
                        DECODER_STATUS_COLOR;
400
                break;
401
        }
402
        case DECODER_SET_NORM: {
403
                int *iarg = arg;
404
 
405
                switch (*iarg) {
406
                case VIDEO_MODE_NTSC:
407
                        break;
408
                default:
409
                        return -EINVAL;
410
                }
411
                break;
412
        }
413
        case DECODER_SET_INPUT: {
414
                int *iarg = arg;
415
 
416
                if (*iarg != 0)
417
                        return -EINVAL;
418
                break;
419
        }
420
        case DECODER_SET_OUTPUT: {
421
                int *iarg = arg;
422
 
423
                if (*iarg != 0)
424
                        return -EINVAL;
425
                break;
426
        }
427
        case DECODER_ENABLE_OUTPUT: {
428
                /* Always enabled */
429
                break;
430
        }
431
        case DECODER_SET_PICTURE: {
432
                // struct video_picture *pic = arg;
433
                /* TODO: convert values for indycam_set_controls() */
434
                break;
435
        }
436
        case DECODER_INDYCAM_GET_CONTROL: {
437
                return indycam_get_control(client, arg);
438
        }
439
        case DECODER_INDYCAM_SET_CONTROL: {
440
                return indycam_set_control(client, arg);
441
        }
442
        default:
443
                return -EINVAL;
444
        }
445
 
446
        return 0;
447
}
448
 
449
static struct i2c_driver i2c_driver_indycam = {
450
        .driver = {
451
                .name   = "indycam",
452
        },
453
        .id             = I2C_DRIVERID_INDYCAM,
454
        .attach_adapter = indycam_probe,
455
        .detach_client  = indycam_detach,
456
        .command        = indycam_command,
457
};
458
 
459
static int __init indycam_init(void)
460
{
461
        return i2c_add_driver(&i2c_driver_indycam);
462
}
463
 
464
static void __exit indycam_exit(void)
465
{
466
        i2c_del_driver(&i2c_driver_indycam);
467
}
468
 
469
module_init(indycam_init);
470
module_exit(indycam_exit);

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