summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/adv7180.c
blob: 0826f0dabc172a72ad2aaa70f931ac2b0b05463a (plain)
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
/*
 * adv7180.c Analog Devices ADV7180 video decoder driver
 * Copyright (c) 2009 Intel Corporation
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <media/v4l2-ioctl.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <linux/mutex.h>

#define DRIVER_NAME "adv7180"

#define ADV7180_INPUT_CONTROL_REG			0x00
#define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM	0x00
#define ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM_PED 0x10
#define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_J_SECAM	0x20
#define ADV7180_INPUT_CONTROL_AD_PAL_N_NTSC_M_SECAM	0x30
#define ADV7180_INPUT_CONTROL_NTSC_J			0x40
#define ADV7180_INPUT_CONTROL_NTSC_M			0x50
#define ADV7180_INPUT_CONTROL_PAL60			0x60
#define ADV7180_INPUT_CONTROL_NTSC_443			0x70
#define ADV7180_INPUT_CONTROL_PAL_BG			0x80
#define ADV7180_INPUT_CONTROL_PAL_N			0x90
#define ADV7180_INPUT_CONTROL_PAL_M			0xa0
#define ADV7180_INPUT_CONTROL_PAL_M_PED			0xb0
#define ADV7180_INPUT_CONTROL_PAL_COMB_N		0xc0
#define ADV7180_INPUT_CONTROL_PAL_COMB_N_PED		0xd0
#define ADV7180_INPUT_CONTROL_PAL_SECAM			0xe0
#define ADV7180_INPUT_CONTROL_PAL_SECAM_PED		0xf0

#define ADV7180_EXTENDED_OUTPUT_CONTROL_REG		0x04
#define ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS		0xC5

#define ADV7180_AUTODETECT_ENABLE_REG			0x07
#define ADV7180_AUTODETECT_DEFAULT			0x7f

#define ADV7180_ADI_CTRL_REG				0x0e
#define ADV7180_ADI_CTRL_IRQ_SPACE			0x20

#define ADV7180_STATUS1_REG				0x10
#define ADV7180_STATUS1_IN_LOCK		0x01
#define ADV7180_STATUS1_AUTOD_MASK	0x70
#define ADV7180_STATUS1_AUTOD_NTSM_M_J	0x00
#define ADV7180_STATUS1_AUTOD_NTSC_4_43 0x10
#define ADV7180_STATUS1_AUTOD_PAL_M	0x20
#define ADV7180_STATUS1_AUTOD_PAL_60	0x30
#define ADV7180_STATUS1_AUTOD_PAL_B_G	0x40
#define ADV7180_STATUS1_AUTOD_SECAM	0x50
#define ADV7180_STATUS1_AUTOD_PAL_COMB	0x60
#define ADV7180_STATUS1_AUTOD_SECAM_525	0x70

#define ADV7180_IDENT_REG 0x11
#define ADV7180_ID_7180 0x18

#define ADV7180_ICONF1_ADI		0x40
#define ADV7180_ICONF1_ACTIVE_LOW	0x01
#define ADV7180_ICONF1_PSYNC_ONLY	0x10
#define ADV7180_ICONF1_ACTIVE_TO_CLR	0xC0

#define ADV7180_IRQ1_LOCK	0x01
#define ADV7180_IRQ1_UNLOCK	0x02
#define ADV7180_ISR1_ADI	0x42
#define ADV7180_ICR1_ADI	0x43
#define ADV7180_IMR1_ADI	0x44
#define ADV7180_IMR2_ADI	0x48
#define ADV7180_IRQ3_AD_CHANGE	0x08
#define ADV7180_ISR3_ADI	0x4A
#define ADV7180_ICR3_ADI	0x4B
#define ADV7180_IMR3_ADI	0x4C
#define ADV7180_IMR4_ADI	0x50

struct adv7180_state {
	struct v4l2_subdev	sd;
	struct work_struct	work;
	struct mutex		mutex; /* mutual excl. when accessing chip */
	int			irq;
	v4l2_std_id		curr_norm;
	bool			autodetect;
};

static v4l2_std_id adv7180_std_to_v4l2(u8 status1)
{
	switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
	case ADV7180_STATUS1_AUTOD_NTSM_M_J:
		return V4L2_STD_NTSC;
	case ADV7180_STATUS1_AUTOD_NTSC_4_43:
		return V4L2_STD_NTSC_443;
	case ADV7180_STATUS1_AUTOD_PAL_M:
		return V4L2_STD_PAL_M;
	case ADV7180_STATUS1_AUTOD_PAL_60:
		return V4L2_STD_PAL_60;
	case ADV7180_STATUS1_AUTOD_PAL_B_G:
		return V4L2_STD_PAL;
	case ADV7180_STATUS1_AUTOD_SECAM:
		return V4L2_STD_SECAM;
	case ADV7180_STATUS1_AUTOD_PAL_COMB:
		return V4L2_STD_PAL_Nc | V4L2_STD_PAL_N;
	case ADV7180_STATUS1_AUTOD_SECAM_525:
		return V4L2_STD_SECAM;
	default:
		return V4L2_STD_UNKNOWN;
	}
}

static int v4l2_std_to_adv7180(v4l2_std_id std)
{
	if (std == V4L2_STD_PAL_60)
		return ADV7180_INPUT_CONTROL_PAL60;
	if (std == V4L2_STD_NTSC_443)
		return ADV7180_INPUT_CONTROL_NTSC_443;
	if (std == V4L2_STD_PAL_N)
		return ADV7180_INPUT_CONTROL_PAL_N;
	if (std == V4L2_STD_PAL_M)
		return ADV7180_INPUT_CONTROL_PAL_M;
	if (std == V4L2_STD_PAL_Nc)
		return ADV7180_INPUT_CONTROL_PAL_COMB_N;

	if (std & V4L2_STD_PAL)
		return ADV7180_INPUT_CONTROL_PAL_BG;
	if (std & V4L2_STD_NTSC)
		return ADV7180_INPUT_CONTROL_NTSC_M;
	if (std & V4L2_STD_SECAM)
		return ADV7180_INPUT_CONTROL_PAL_SECAM;

	return -EINVAL;
}

static u32 adv7180_status_to_v4l2(u8 status1)
{
	if (!(status1 & ADV7180_STATUS1_IN_LOCK))
		return V4L2_IN_ST_NO_SIGNAL;

	return 0;
}

static int __adv7180_status(struct i2c_client *client, u32 *status,
	v4l2_std_id *std)
{
	int status1 = i2c_smbus_read_byte_data(client, ADV7180_STATUS1_REG);

	if (status1 < 0)
		return status1;

	if (status)
		*status = adv7180_status_to_v4l2(status1);
	if (std)
		*std = adv7180_std_to_v4l2(status1);

	return 0;
}

static inline struct adv7180_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct adv7180_state, sd);
}

static int adv7180_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
	struct adv7180_state *state = to_state(sd);
	int err = mutex_lock_interruptible(&state->mutex);
	if (err)
		return err;

	/* when we are interrupt driven we know the state */
	if (!state->autodetect || state->irq > 0)
		*std = state->curr_norm;
	else
		err = __adv7180_status(v4l2_get_subdevdata(sd), NULL, std);

	mutex_unlock(&state->mutex);
	return err;
}

static int adv7180_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
	struct adv7180_state *state = to_state(sd);
	int ret = mutex_lock_interruptible(&state->mutex);
	if (ret)
		return ret;

	ret = __adv7180_status(v4l2_get_subdevdata(sd), status, NULL);
	mutex_unlock(&state->mutex);
	return ret;
}

static int adv7180_g_chip_ident(struct v4l2_subdev *sd,
	struct v4l2_dbg_chip_ident *chip)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7180, 0);
}

static int adv7180_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
	struct adv7180_state *state = to_state(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int ret = mutex_lock_interruptible(&state->mutex);
	if (ret)
		return ret;

	/* all standards -> autodetect */
	if (std == V4L2_STD_ALL) {
		ret = i2c_smbus_write_byte_data(client,
			ADV7180_INPUT_CONTROL_REG,
			ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM);
		if (ret < 0)
			goto out;

		__adv7180_status(client, NULL, &state->curr_norm);
		state->autodetect = true;
	} else {
		ret = v4l2_std_to_adv7180(std);
		if (ret < 0)
			goto out;

		ret = i2c_smbus_write_byte_data(client,
			ADV7180_INPUT_CONTROL_REG, ret);
		if (ret < 0)
			goto out;

		state->curr_norm = std;
		state->autodetect = false;
	}
	ret = 0;
out:
	mutex_unlock(&state->mutex);
	return ret;
}

static const struct v4l2_subdev_video_ops adv7180_video_ops = {
	.querystd = adv7180_querystd,
	.g_input_status = adv7180_g_input_status,
};

static const struct v4l2_subdev_core_ops adv7180_core_ops = {
	.g_chip_ident = adv7180_g_chip_ident,
	.s_std = adv7180_s_std,
};

static const struct v4l2_subdev_ops adv7180_ops = {
	.core = &adv7180_core_ops,
	.video = &adv7180_video_ops,
};

static void adv7180_work(struct work_struct *work)
{
	struct adv7180_state *state = container_of(work, struct adv7180_state,
		work);
	struct i2c_client *client = v4l2_get_subdevdata(&state->sd);
	u8 isr3;

	mutex_lock(&state->mutex);
	i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
		ADV7180_ADI_CTRL_IRQ_SPACE);
	isr3 = i2c_smbus_read_byte_data(client, ADV7180_ISR3_ADI);
	/* clear */
	i2c_smbus_write_byte_data(client, ADV7180_ICR3_ADI, isr3);
	i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG, 0);

	if (isr3 & ADV7180_IRQ3_AD_CHANGE && state->autodetect)
		__adv7180_status(client, NULL, &state->curr_norm);
	mutex_unlock(&state->mutex);

	enable_irq(state->irq);
}

static irqreturn_t adv7180_irq(int irq, void *devid)
{
	struct adv7180_state *state = devid;

	schedule_work(&state->work);

	disable_irq_nosync(state->irq);

	return IRQ_HANDLED;
}

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */

static __devinit int adv7180_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct adv7180_state *state;
	struct v4l2_subdev *sd;
	int ret;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	v4l_info(client, "chip found @ 0x%02x (%s)\n",
			client->addr << 1, client->adapter->name);

	state = kzalloc(sizeof(struct adv7180_state), GFP_KERNEL);
	if (state == NULL) {
		ret = -ENOMEM;
		goto err;
	}

	state->irq = client->irq;
	INIT_WORK(&state->work, adv7180_work);
	mutex_init(&state->mutex);
	state->autodetect = true;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &adv7180_ops);

	/* Initialize adv7180 */
	/* Enable autodetection */
	ret = i2c_smbus_write_byte_data(client, ADV7180_INPUT_CONTROL_REG,
		ADV7180_INPUT_CONTROL_AD_PAL_BG_NTSC_J_SECAM);
	if (ret < 0)
		goto err_unreg_subdev;

	ret = i2c_smbus_write_byte_data(client, ADV7180_AUTODETECT_ENABLE_REG,
		ADV7180_AUTODETECT_DEFAULT);
	if (ret < 0)
		goto err_unreg_subdev;

	/* ITU-R BT.656-4 compatible */
	ret = i2c_smbus_write_byte_data(client,
		ADV7180_EXTENDED_OUTPUT_CONTROL_REG,
		ADV7180_EXTENDED_OUTPUT_CONTROL_NTSCDIS);
	if (ret < 0)
		goto err_unreg_subdev;

	/* read current norm */
	__adv7180_status(client, NULL, &state->curr_norm);

	/* register for interrupts */
	if (state->irq > 0) {
		ret = request_irq(state->irq, adv7180_irq, 0, DRIVER_NAME,
			state);
		if (ret)
			goto err_unreg_subdev;

		ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
			ADV7180_ADI_CTRL_IRQ_SPACE);
		if (ret < 0)
			goto err_unreg_subdev;

		/* config the Interrupt pin to be active low */
		ret = i2c_smbus_write_byte_data(client, ADV7180_ICONF1_ADI,
			ADV7180_ICONF1_ACTIVE_LOW | ADV7180_ICONF1_PSYNC_ONLY);
		if (ret < 0)
			goto err_unreg_subdev;

		ret = i2c_smbus_write_byte_data(client, ADV7180_IMR1_ADI, 0);
		if (ret < 0)
			goto err_unreg_subdev;

		ret = i2c_smbus_write_byte_data(client, ADV7180_IMR2_ADI, 0);
		if (ret < 0)
			goto err_unreg_subdev;

		/* enable AD change interrupts interrupts */
		ret = i2c_smbus_write_byte_data(client, ADV7180_IMR3_ADI,
			ADV7180_IRQ3_AD_CHANGE);
		if (ret < 0)
			goto err_unreg_subdev;

		ret = i2c_smbus_write_byte_data(client, ADV7180_IMR4_ADI, 0);
		if (ret < 0)
			goto err_unreg_subdev;

		ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
			0);
		if (ret < 0)
			goto err_unreg_subdev;
	}

	return 0;

err_unreg_subdev:
	mutex_destroy(&state->mutex);
	v4l2_device_unregister_subdev(sd);
	kfree(state);
err:
	printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", ret);
	return ret;
}

static __devexit int adv7180_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct adv7180_state *state = to_state(sd);

	if (state->irq > 0) {
		free_irq(client->irq, state);
		if (cancel_work_sync(&state->work)) {
			/*
			 * Work was pending, therefore we need to enable
			 * IRQ here to balance the disable_irq() done in the
			 * interrupt handler.
			 */
			enable_irq(state->irq);
		}
	}

	mutex_destroy(&state->mutex);
	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));
	return 0;
}

static const struct i2c_device_id adv7180_id[] = {
	{DRIVER_NAME, 0},
	{},
};

MODULE_DEVICE_TABLE(i2c, adv7180_id);

static struct i2c_driver adv7180_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= DRIVER_NAME,
	},
	.probe		= adv7180_probe,
	.remove		= __devexit_p(adv7180_remove),
	.id_table	= adv7180_id,
};

static __init int adv7180_init(void)
{
	return i2c_add_driver(&adv7180_driver);
}

static __exit void adv7180_exit(void)
{
	i2c_del_driver(&adv7180_driver);
}

module_init(adv7180_init);
module_exit(adv7180_exit);

MODULE_DESCRIPTION("Analog Devices ADV7180 video decoder driver");
MODULE_AUTHOR("Mocean Laboratories");
MODULE_LICENSE("GPL v2");

OpenPOWER on IntegriCloud