summaryrefslogtreecommitdiff
path: root/drivers/media/video/cx25840/cx25840-audio.c
blob: d6421e1e8f6a793e0cdaeddca6885e9746b188e3 (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
/* cx25840 audio functions
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


#include <linux/videodev2.h>
#include <linux/i2c.h>
#include <media/v4l2-common.h>
#include <media/cx25840.h>

#include "cx25840-core.h"

static int set_audclk_freq(struct i2c_client *client, u32 freq)
{
	struct cx25840_state *state = i2c_get_clientdata(client);

	if (freq != 32000 && freq != 44100 && freq != 48000)
		return -EINVAL;

	/* common for all inputs and rates */
	/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
	if (!state->is_cx23885)
		cx25840_write(client, 0x127, 0x50);

	if (state->aud_input != CX25840_AUDIO_SERIAL) {
		switch (freq) {
		case 32000:
			if (state->is_cx23885) {
				/* We don't have register values
				 * so avoid destroying registers. */
				break;
			}
			/* VID_PLL and AUX_PLL */
			cx25840_write4(client, 0x108, 0x1006040f);

			/* AUX_PLL_FRAC */
			cx25840_write4(client, 0x110, 0x01bb39ee);

			if (state->is_cx25836)
				break;

			/* src3/4/6_ctl = 0x0801f77f */
			cx25840_write4(client, 0x900, 0x0801f77f);
			cx25840_write4(client, 0x904, 0x0801f77f);
			cx25840_write4(client, 0x90c, 0x0801f77f);
			break;

		case 44100:
			if (state->is_cx23885) {
				/* We don't have register values
				 * so avoid destroying registers. */
				break;
			}
			/* VID_PLL and AUX_PLL */
			cx25840_write4(client, 0x108, 0x1009040f);

			/* AUX_PLL_FRAC */
			cx25840_write4(client, 0x110, 0x00ec6bd6);

			if (state->is_cx25836)
				break;

			/* src3/4/6_ctl = 0x08016d59 */
			cx25840_write4(client, 0x900, 0x08016d59);
			cx25840_write4(client, 0x904, 0x08016d59);
			cx25840_write4(client, 0x90c, 0x08016d59);
			break;

		case 48000:
			if (state->is_cx23885) {
				/* We don't have register values
				 * so avoid destroying registers. */
				break;
			}
			/* VID_PLL and AUX_PLL */
			cx25840_write4(client, 0x108, 0x100a040f);

			/* AUX_PLL_FRAC */
			cx25840_write4(client, 0x110, 0x0098d6e5);

			if (state->is_cx25836)
				break;

			/* src3/4/6_ctl = 0x08014faa */
			cx25840_write4(client, 0x900, 0x08014faa);
			cx25840_write4(client, 0x904, 0x08014faa);
			cx25840_write4(client, 0x90c, 0x08014faa);
			break;
		}
	} else {
		switch (freq) {
		case 32000:
			if (state->is_cx23885) {
				/* We don't have register values
				 * so avoid destroying registers. */
				break;
			}
			/* VID_PLL and AUX_PLL */
			cx25840_write4(client, 0x108, 0x1e08040f);

			/* AUX_PLL_FRAC */
			cx25840_write4(client, 0x110, 0x012a0869);

			if (state->is_cx25836)
				break;

			/* src1_ctl = 0x08010000 */
			cx25840_write4(client, 0x8f8, 0x08010000);

			/* src3/4/6_ctl = 0x08020000 */
			cx25840_write4(client, 0x900, 0x08020000);
			cx25840_write4(client, 0x904, 0x08020000);
			cx25840_write4(client, 0x90c, 0x08020000);

			/* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
			cx25840_write(client, 0x127, 0x54);
			break;

		case 44100:
			if (state->is_cx23885) {
				/* We don't have register values
				 * so avoid destroying registers. */
				break;
			}

			/* VID_PLL and AUX_PLL */
			cx25840_write4(client, 0x108, 0x1809040f);

			/* AUX_PLL_FRAC */
			cx25840_write4(client, 0x110, 0x00ec6bd6);

			if (state->is_cx25836)
				break;

			/* src1_ctl = 0x08010000 */
			cx25840_write4(client, 0x8f8, 0x080160cd);

			/* src3/4/6_ctl = 0x08020000 */
			cx25840_write4(client, 0x900, 0x08017385);
			cx25840_write4(client, 0x904, 0x08017385);
			cx25840_write4(client, 0x90c, 0x08017385);
			break;

		case 48000:
			if (!state->is_cx23885) {
				/* VID_PLL and AUX_PLL */
				cx25840_write4(client, 0x108, 0x180a040f);

				/* AUX_PLL_FRAC */
				cx25840_write4(client, 0x110, 0x0098d6e5);
			}

			if (state->is_cx25836)
				break;

			if (!state->is_cx23885) {
				/* src1_ctl */
				cx25840_write4(client, 0x8f8, 0x08018000);

				/* src3/4/6_ctl */
				cx25840_write4(client, 0x900, 0x08015555);
				cx25840_write4(client, 0x904, 0x08015555);
				cx25840_write4(client, 0x90c, 0x08015555);
			} else {

				cx25840_write4(client, 0x8f8, 0x0801867c);

				cx25840_write4(client, 0x900, 0x08014faa);
				cx25840_write4(client, 0x904, 0x08014faa);
				cx25840_write4(client, 0x90c, 0x08014faa);
			}
			break;
		}
	}

	state->audclk_freq = freq;

	return 0;
}

void cx25840_audio_set_path(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);

	/* assert soft reset */
	cx25840_and_or(client, 0x810, ~0x1, 0x01);

	/* stop microcontroller */
	cx25840_and_or(client, 0x803, ~0x10, 0);

	/* Mute everything to prevent the PFFT! */
	cx25840_write(client, 0x8d3, 0x1f);

	if (state->aud_input == CX25840_AUDIO_SERIAL) {
		/* Set Path1 to Serial Audio Input */
		cx25840_write4(client, 0x8d0, 0x01011012);

		/* The microcontroller should not be started for the
		 * non-tuner inputs: autodetection is specific for
		 * TV audio. */
	} else {
		/* Set Path1 to Analog Demod Main Channel */
		cx25840_write4(client, 0x8d0, 0x1f063870);
	}

	set_audclk_freq(client, state->audclk_freq);

	if (state->aud_input != CX25840_AUDIO_SERIAL) {
		/* When the microcontroller detects the
		 * audio format, it will unmute the lines */
		cx25840_and_or(client, 0x803, ~0x10, 0x10);
	}

	/* deassert soft reset */
	cx25840_and_or(client, 0x810, ~0x1, 0x00);

	if (state->is_cx23885) {
		/* Ensure the controller is running when we exit */
		cx25840_and_or(client, 0x803, ~0x10, 0x10);
	}
}

static int get_volume(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	int vol;

	if (state->unmute_volume >= 0)
		return state->unmute_volume;

	/* Volume runs +18dB to -96dB in 1/2dB steps
	 * change to fit the msp3400 -114dB to +12dB range */

	/* check PATH1_VOLUME */
	vol = 228 - cx25840_read(client, 0x8d4);
	vol = (vol / 2) + 23;
	return vol << 9;
}

static void set_volume(struct i2c_client *client, int volume)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	int vol;

	if (state->unmute_volume >= 0) {
		state->unmute_volume = volume;
		return;
	}

	/* Convert the volume to msp3400 values (0-127) */
	vol = volume >> 9;

	/* now scale it up to cx25840 values
	 * -114dB to -96dB maps to 0
	 * this should be 19, but in my testing that was 4dB too loud */
	if (vol <= 23) {
		vol = 0;
	} else {
		vol -= 23;
	}

	/* PATH1_VOLUME */
	cx25840_write(client, 0x8d4, 228 - (vol * 2));
}

static int get_bass(struct i2c_client *client)
{
	/* bass is 49 steps +12dB to -12dB */

	/* check PATH1_EQ_BASS_VOL */
	int bass = cx25840_read(client, 0x8d9) & 0x3f;
	bass = (((48 - bass) * 0xffff) + 47) / 48;
	return bass;
}

static void set_bass(struct i2c_client *client, int bass)
{
	/* PATH1_EQ_BASS_VOL */
	cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
}

static int get_treble(struct i2c_client *client)
{
	/* treble is 49 steps +12dB to -12dB */

	/* check PATH1_EQ_TREBLE_VOL */
	int treble = cx25840_read(client, 0x8db) & 0x3f;
	treble = (((48 - treble) * 0xffff) + 47) / 48;
	return treble;
}

static void set_treble(struct i2c_client *client, int treble)
{
	/* PATH1_EQ_TREBLE_VOL */
	cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
}

static int get_balance(struct i2c_client *client)
{
	/* balance is 7 bit, 0 to -96dB */

	/* check PATH1_BAL_LEVEL */
	int balance = cx25840_read(client, 0x8d5) & 0x7f;
	/* check PATH1_BAL_LEFT */
	if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
		balance = 0x80 - balance;
	else
		balance = 0x80 + balance;
	return balance << 8;
}

static void set_balance(struct i2c_client *client, int balance)
{
	int bal = balance >> 8;
	if (bal > 0x80) {
		/* PATH1_BAL_LEFT */
		cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
		/* PATH1_BAL_LEVEL */
		cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
	} else {
		/* PATH1_BAL_LEFT */
		cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
		/* PATH1_BAL_LEVEL */
		cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
	}
}

static int get_mute(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);

	return state->unmute_volume >= 0;
}

static void set_mute(struct i2c_client *client, int mute)
{
	struct cx25840_state *state = i2c_get_clientdata(client);

	if (mute && state->unmute_volume == -1) {
		int vol = get_volume(client);

		set_volume(client, 0);
		state->unmute_volume = vol;
	}
	else if (!mute && state->unmute_volume != -1) {
		int vol = state->unmute_volume;

		state->unmute_volume = -1;
		set_volume(client, vol);
	}
}

int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	struct v4l2_control *ctrl = arg;
	int retval;

	switch (cmd) {
	case VIDIOC_INT_AUDIO_CLOCK_FREQ:
		if (!state->is_cx25836)
			cx25840_and_or(client, 0x810, ~0x1, 1);
		if (state->aud_input != CX25840_AUDIO_SERIAL) {
			cx25840_and_or(client, 0x803, ~0x10, 0);
			cx25840_write(client, 0x8d3, 0x1f);
		}
		retval = set_audclk_freq(client, *(u32 *)arg);
		if (state->aud_input != CX25840_AUDIO_SERIAL) {
			cx25840_and_or(client, 0x803, ~0x10, 0x10);
		}
		if (!state->is_cx25836)
			cx25840_and_or(client, 0x810, ~0x1, 0);
		return retval;

	case VIDIOC_G_CTRL:
		switch (ctrl->id) {
		case V4L2_CID_AUDIO_VOLUME:
			ctrl->value = get_volume(client);
			break;
		case V4L2_CID_AUDIO_BASS:
			ctrl->value = get_bass(client);
			break;
		case V4L2_CID_AUDIO_TREBLE:
			ctrl->value = get_treble(client);
			break;
		case V4L2_CID_AUDIO_BALANCE:
			ctrl->value = get_balance(client);
			break;
		case V4L2_CID_AUDIO_MUTE:
			ctrl->value = get_mute(client);
			break;
		default:
			return -EINVAL;
		}
		break;

	case VIDIOC_S_CTRL:
		switch (ctrl->id) {
		case V4L2_CID_AUDIO_VOLUME:
			set_volume(client, ctrl->value);
			break;
		case V4L2_CID_AUDIO_BASS:
			set_bass(client, ctrl->value);
			break;
		case V4L2_CID_AUDIO_TREBLE:
			set_treble(client, ctrl->value);
			break;
		case V4L2_CID_AUDIO_BALANCE:
			set_balance(client, ctrl->value);
			break;
		case V4L2_CID_AUDIO_MUTE:
			set_mute(client, ctrl->value);
			break;
		default:
			return -EINVAL;
		}
		break;

	default:
		return -EINVAL;
	}

	return 0;
}