aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/indycam.c
blob: 3eba514cdb29fccef17cbc560f1352b7ce4cb422 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
/*
 *  indycam.c - Silicon Graphics IndyCam digital camera driver
 *
 *  Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
 *  Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <linux/videodev.h>
/* IndyCam decodes stream of photons into digital image representation ;-) */
#include <linux/video_decoder.h>
#include <linux/i2c.h>

#include "indycam.h"

#define INDYCAM_MODULE_VERSION "0.0.5"

MODULE_DESCRIPTION("SGI IndyCam driver");
MODULE_VERSION(INDYCAM_MODULE_VERSION);
MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
MODULE_LICENSE("GPL");

// #define INDYCAM_DEBUG

#ifdef INDYCAM_DEBUG
#define dprintk(x...) printk("IndyCam: " x);
#define indycam_regdump(client) indycam_regdump_debug(client)
#else
#define dprintk(x...)
#define indycam_regdump(client)
#endif

struct indycam {
	struct i2c_client *client;
	u8 version;
};

static struct i2c_driver i2c_driver_indycam;

static const u8 initseq[] = {
	INDYCAM_CONTROL_AGCENA,		/* INDYCAM_CONTROL */
	INDYCAM_SHUTTER_60,		/* INDYCAM_SHUTTER */
	INDYCAM_GAIN_DEFAULT,		/* INDYCAM_GAIN */
	0x00,				/* INDYCAM_BRIGHTNESS (read-only) */
	INDYCAM_RED_BALANCE_DEFAULT,	/* INDYCAM_RED_BALANCE */
	INDYCAM_BLUE_BALANCE_DEFAULT,	/* INDYCAM_BLUE_BALANCE */
	INDYCAM_RED_SATURATION_DEFAULT,	/* INDYCAM_RED_SATURATION */
	INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */
};

/* IndyCam register handling */

static int indycam_read_reg(struct i2c_client *client, u8 reg, u8 *value)
{
	int ret;

	if (reg == INDYCAM_REG_RESET) {
		dprintk("indycam_read_reg(): "
			"skipping write-only register %d\n", reg);
		*value = 0;
		return 0;
	}

	ret = i2c_smbus_read_byte_data(client, reg);

	if (ret < 0) {
		printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, "
		       "register = 0x%02x\n", reg);
		return ret;
	}

	*value = (u8)ret;

	return 0;
}

static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value)
{
	int err;

	if ((reg == INDYCAM_REG_BRIGHTNESS)
	    || (reg == INDYCAM_REG_VERSION)) {
		dprintk("indycam_write_reg(): "
			"skipping read-only register %d\n", reg);
		return 0;
	}

	dprintk("Writing Reg %d = 0x%02x\n", reg, value);
	err = i2c_smbus_write_byte_data(client, reg, value);

	if (err) {
		printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, "
		       "register = 0x%02x, value = 0x%02x\n", reg, value);
	}
	return err;
}

static int indycam_write_block(struct i2c_client *client, u8 reg,
			       u8 length, u8 *data)
{
	int i, err;

	for (i = 0; i < length; i++) {
		err = indycam_write_reg(client, reg + i, data[i]);
		if (err)
			return err;
	}

	return 0;
}

/* Helper functions */

#ifdef INDYCAM_DEBUG
static void indycam_regdump_debug(struct i2c_client *client)
{
	int i;
	u8 val;

	for (i = 0; i < 9; i++) {
		indycam_read_reg(client, i, &val);
		dprintk("Reg %d = 0x%02x\n", i, val);
	}
}
#endif

static int indycam_get_control(struct i2c_client *client,
			       struct indycam_control *ctrl)
{
	struct indycam *camera = i2c_get_clientdata(client);
	u8 reg;
	int ret = 0;

	switch (ctrl->type) {
	case INDYCAM_CONTROL_AGC:
	case INDYCAM_CONTROL_AWB:
		ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
		if (ret)
			return -EIO;
		if (ctrl->type == INDYCAM_CONTROL_AGC)
			ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
				? 1 : 0;
		else
			ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
				? 1 : 0;
		break;
	case INDYCAM_CONTROL_SHUTTER:
		ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, &reg);
		if (ret)
			return -EIO;
		ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
		break;
	case INDYCAM_CONTROL_GAIN:
		ret = indycam_read_reg(client, INDYCAM_REG_GAIN, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_RED_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_BLUE_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_RED_SATURATION:
		ret = indycam_read_reg(client,
				       INDYCAM_REG_RED_SATURATION, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_BLUE_SATURATION:
		ret = indycam_read_reg(client,
				       INDYCAM_REG_BLUE_SATURATION, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_GAMMA:
		if (camera->version == CAMERA_VERSION_MOOSE) {
			ret = indycam_read_reg(client,
					       INDYCAM_REG_GAMMA, &reg);
			if (ret)
				return -EIO;
			ctrl->value = (s32)reg;
		} else {
			ctrl->value = INDYCAM_GAMMA_DEFAULT;
		}
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

static int indycam_set_control(struct i2c_client *client,
			       struct indycam_control *ctrl)
{
	struct indycam *camera = i2c_get_clientdata(client);
	u8 reg;
	int ret = 0;

	switch (ctrl->type) {
	case INDYCAM_CONTROL_AGC:
	case INDYCAM_CONTROL_AWB:
		ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
		if (ret)
			break;

		if (ctrl->type == INDYCAM_CONTROL_AGC) {
			if (ctrl->value)
				reg |= INDYCAM_CONTROL_AGCENA;
			else
				reg &= ~INDYCAM_CONTROL_AGCENA;
		} else {
			if (ctrl->value)
				reg |= INDYCAM_CONTROL_AWBCTL;
			else
				reg &= ~INDYCAM_CONTROL_AWBCTL;
		}

		ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg);
		break;
	case INDYCAM_CONTROL_SHUTTER:
		reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
		ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
		break;
	case INDYCAM_CONTROL_GAIN:
		ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
		break;
	case INDYCAM_CONTROL_RED_BALANCE:
		ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_BLUE_BALANCE:
		ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_RED_SATURATION:
		ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_BLUE_SATURATION:
		ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_GAMMA:
		if (camera->version == CAMERA_VERSION_MOOSE) {
			ret = indycam_write_reg(client, INDYCAM_REG_GAMMA,
						ctrl->value);
		}
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

/* I2C-interface */

static int indycam_attach(struct i2c_adapter *adap, int addr, int kind)
{
	int err = 0;
	struct indycam *camera;
	struct i2c_client *client;

	printk(KERN_INFO "SGI IndyCam driver version %s\n",
	       INDYCAM_MODULE_VERSION);

	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (!client)
		return -ENOMEM;
	camera = kmalloc(sizeof(struct indycam), GFP_KERNEL);
	if (!camera) {
		err = -ENOMEM;
		goto out_free_client;
	}

	memset(client, 0, sizeof(struct i2c_client));
	memset(camera, 0, sizeof(struct indycam));

	client->addr = addr;
	client->adapter = adap;
	client->driver = &i2c_driver_indycam;
	client->flags = 0;
	strcpy(client->name, "IndyCam client");
	i2c_set_clientdata(client, camera);

	camera->client = client;

	err = i2c_attach_client(client);
	if (err)
		goto out_free_camera;

	camera->version = i2c_smbus_read_byte_data(client,
						   INDYCAM_REG_VERSION);
	if (camera->version != CAMERA_VERSION_INDY &&
	    camera->version != CAMERA_VERSION_MOOSE) {
		err = -ENODEV;
		goto out_detach_client;
	}
	printk(KERN_INFO "IndyCam v%d.%d detected\n",
	       INDYCAM_VERSION_MAJOR(camera->version),
	       INDYCAM_VERSION_MINOR(camera->version));

	indycam_regdump(client);

	// initialize
	err = indycam_write_block(client, 0, sizeof(initseq), (u8 *)&initseq);
	if (err) {
		printk(KERN_ERR "IndyCam initalization failed\n");
		err = -EIO;
		goto out_detach_client;
	}

	indycam_regdump(client);

	// white balance
	err = indycam_write_reg(client, INDYCAM_REG_CONTROL,
			  INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL);
	if (err) {
		printk(KERN_ERR "IndyCam: White balancing camera failed\n");
		err = -EIO;
		goto out_detach_client;
	}

	indycam_regdump(client);

	printk(KERN_INFO "IndyCam initialized\n");

	return 0;

out_detach_client:
	i2c_detach_client(client);
out_free_camera:
	kfree(camera);
out_free_client:
	kfree(client);
	return err;
}

static int indycam_probe(struct i2c_adapter *adap)
{
	/* Indy specific crap */
	if (adap->id == I2C_HW_SGI_VINO)
		return indycam_attach(adap, INDYCAM_ADDR, 0);
	/* Feel free to add probe here :-) */
	return -ENODEV;
}

static int indycam_detach(struct i2c_client *client)
{
	struct indycam *camera = i2c_get_clientdata(client);

	i2c_detach_client(client);
	kfree(camera);
	kfree(client);
	return 0;
}

static int indycam_command(struct i2c_client *client, unsigned int cmd,
			   void *arg)
{
	// struct indycam *camera = i2c_get_clientdata(client);

	/* The old video_decoder interface just isn't enough,
	 * so we'll use some custom commands. */
	switch (cmd) {
	case DECODER_GET_CAPABILITIES: {
		struct video_decoder_capability *cap = arg;

		cap->flags  = VIDEO_DECODER_NTSC;
		cap->inputs = 1;
		cap->outputs = 1;
		break;
	}
	case DECODER_GET_STATUS: {
		int *iarg = arg;

		*iarg = DECODER_STATUS_GOOD | DECODER_STATUS_NTSC |
			DECODER_STATUS_COLOR;
		break;
	}
	case DECODER_SET_NORM: {
		int *iarg = arg;

		switch (*iarg) {
		case VIDEO_MODE_NTSC:
			break;
		default:
			return -EINVAL;
		}
		break;
	}
	case DECODER_SET_INPUT:	{
		int *iarg = arg;

		if (*iarg != 0)
			return -EINVAL;
		break;
	}
	case DECODER_SET_OUTPUT: {
		int *iarg = arg;

		if (*iarg != 0)
			return -EINVAL;
		break;
	}
	case DECODER_ENABLE_OUTPUT: {
		/* Always enabled */
		break;
	}
	case DECODER_SET_PICTURE: {
		// struct video_picture *pic = arg;
		/* TODO: convert values for indycam_set_controls() */
		break;
	}
	case DECODER_INDYCAM_GET_CONTROL: {
		return indycam_get_control(client, arg);
	}
	case DECODER_INDYCAM_SET_CONTROL: {
		return indycam_set_control(client, arg);
	}
	default:
		return -EINVAL;
	}

	return 0;
}

static struct i2c_driver i2c_driver_indycam = {
	.owner		= THIS_MODULE,
	.name		= "indycam",
	.id		= I2C_DRIVERID_INDYCAM,
	.attach_adapter = indycam_probe,
	.detach_client	= indycam_detach,
	.command	= indycam_command,
};

static int __init indycam_init(void)
{
	return i2c_add_driver(&i2c_driver_indycam);
}

static void __exit indycam_exit(void)
{
	i2c_del_driver(&i2c_driver_indycam);
}

module_init(indycam_init);
module_exit(indycam_exit);