projects / deliverable / linux.git / blob
? search:


a3c5b521da6a5740a9bf27cf34da2a43668ee4f9
[deliverable/linux.git] / sound / soc / codecs / tlv320dac33.c
1 /*
2 * ALSA SoC Texas Instruments TLV320DAC33 codec driver
3 *
4 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
5 *
6 * Copyright: (C) 2009 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/pm.h>
29 #include <linux/i2c.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/gpio.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/slab.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dapm.h>
40 #include <sound/initval.h>
41 #include <sound/tlv.h>
42
43 #include <sound/tlv320dac33-plat.h>
44 #include "tlv320dac33.h"
45
46 #define DAC33_BUFFER_SIZE_BYTES 24576 /* bytes, 12288 16 bit words,
47 * 6144 stereo */
48 #define DAC33_BUFFER_SIZE_SAMPLES 6144
49
50 #define NSAMPLE_MAX 5700
51
52 #define MODE7_LTHR 10
53 #define MODE7_UTHR (DAC33_BUFFER_SIZE_SAMPLES - 10)
54
55 #define BURST_BASEFREQ_HZ 49152000
56
57 #define SAMPLES_TO_US(rate, samples) \
58 (1000000000 / ((rate * 1000) / samples))
59
60 #define US_TO_SAMPLES(rate, us) \
61 (rate / (1000000 / us))
62
63 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
64 ((samples * 5000) / ((burstrate * 5000) / (burstrate - playrate)))
65
66 static void dac33_calculate_times(struct snd_pcm_substream *substream);
67 static int dac33_prepare_chip(struct snd_pcm_substream *substream);
68
69 enum dac33_state {
70 DAC33_IDLE = 0,
71 DAC33_PREFILL,
72 DAC33_PLAYBACK,
73 DAC33_FLUSH,
74 };
75
76 enum dac33_fifo_modes {
77 DAC33_FIFO_BYPASS = 0,
78 DAC33_FIFO_MODE1,
79 DAC33_FIFO_MODE7,
80 DAC33_FIFO_LAST_MODE,
81 };
82
83 #define DAC33_NUM_SUPPLIES 3
84 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
85 "AVDD",
86 "DVDD",
87 "IOVDD",
88 };
89
90 struct tlv320dac33_priv {
91 struct mutex mutex;
92 struct workqueue_struct *dac33_wq;
93 struct work_struct work;
94 struct snd_soc_codec *codec;
95 struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
96 struct snd_pcm_substream *substream;
97 int power_gpio;
98 int chip_power;
99 int irq;
100 unsigned int refclk;
101
102 unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
103 unsigned int nsample_min; /* nsample should not be lower than
104 * this */
105 unsigned int nsample_max; /* nsample should not be higher than
106 * this */
107 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
108 unsigned int nsample; /* burst read amount from host */
109 int mode1_latency; /* latency caused by the i2c writes in
110 * us */
111 int auto_fifo_config; /* Configure the FIFO based on the
112 * period size */
113 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
114 unsigned int burst_rate; /* Interface speed in Burst modes */
115
116 int keep_bclk; /* Keep the BCLK continuously running
117 * in FIFO modes */
118 spinlock_t lock;
119 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */
120 unsigned long long t_stamp2; /* calculate the FIFO caused delay */
121
122 unsigned int mode1_us_burst; /* Time to burst read n number of
123 * samples */
124 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */
125
126 unsigned int uthr;
127
128 enum dac33_state state;
129 enum snd_soc_control_type control_type;
130 void *control_data;
131 };
132
133 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
134 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
135 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
136 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
137 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
138 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
139 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
140 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
141 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
142 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
143 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
144 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
145 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
146 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
147 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
148 0x00, 0x00, /* 0x38 - 0x39 */
149 /* Registers 0x3a - 0x3f are reserved */
150 0x00, 0x00, /* 0x3a - 0x3b */
151 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
152
153 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
154 0x00, 0x80, /* 0x44 - 0x45 */
155 /* Registers 0x46 - 0x47 are reserved */
156 0x80, 0x80, /* 0x46 - 0x47 */
157
158 0x80, 0x00, 0x00, /* 0x48 - 0x4a */
159 /* Registers 0x4b - 0x7c are reserved */
160 0x00, /* 0x4b */
161 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
162 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
163 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
164 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
165 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
166 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
167 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
168 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
169 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
170 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
171 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
172 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
173 0x00, /* 0x7c */
174
175 0xda, 0x33, 0x03, /* 0x7d - 0x7f */
176 };
177
178 /* Register read and write */
179 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
180 unsigned reg)
181 {
182 u8 *cache = codec->reg_cache;
183 if (reg >= DAC33_CACHEREGNUM)
184 return 0;
185
186 return cache[reg];
187 }
188
189 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
190 u8 reg, u8 value)
191 {
192 u8 *cache = codec->reg_cache;
193 if (reg >= DAC33_CACHEREGNUM)
194 return;
195
196 cache[reg] = value;
197 }
198
199 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
200 u8 *value)
201 {
202 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
203 int val;
204
205 *value = reg & 0xff;
206
207 /* If powered off, return the cached value */
208 if (dac33->chip_power) {
209 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
210 if (val < 0) {
211 dev_err(codec->dev, "Read failed (%d)\n", val);
212 value[0] = dac33_read_reg_cache(codec, reg);
213 } else {
214 value[0] = val;
215 dac33_write_reg_cache(codec, reg, val);
216 }
217 } else {
218 value[0] = dac33_read_reg_cache(codec, reg);
219 }
220
221 return 0;
222 }
223
224 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
225 unsigned int value)
226 {
227 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
228 u8 data[2];
229 int ret = 0;
230
231 /*
232 * data is
233 * D15..D8 dac33 register offset
234 * D7...D0 register data
235 */
236 data[0] = reg & 0xff;
237 data[1] = value & 0xff;
238
239 dac33_write_reg_cache(codec, data[0], data[1]);
240 if (dac33->chip_power) {
241 ret = codec->hw_write(codec->control_data, data, 2);
242 if (ret != 2)
243 dev_err(codec->dev, "Write failed (%d)\n", ret);
244 else
245 ret = 0;
246 }
247
248 return ret;
249 }
250
251 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
252 unsigned int value)
253 {
254 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
255 int ret;
256
257 mutex_lock(&dac33->mutex);
258 ret = dac33_write(codec, reg, value);
259 mutex_unlock(&dac33->mutex);
260
261 return ret;
262 }
263
264 #define DAC33_I2C_ADDR_AUTOINC 0x80
265 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
266 unsigned int value)
267 {
268 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
269 u8 data[3];
270 int ret = 0;
271
272 /*
273 * data is
274 * D23..D16 dac33 register offset
275 * D15..D8 register data MSB
276 * D7...D0 register data LSB
277 */
278 data[0] = reg & 0xff;
279 data[1] = (value >> 8) & 0xff;
280 data[2] = value & 0xff;
281
282 dac33_write_reg_cache(codec, data[0], data[1]);
283 dac33_write_reg_cache(codec, data[0] + 1, data[2]);
284
285 if (dac33->chip_power) {
286 /* We need to set autoincrement mode for 16 bit writes */
287 data[0] |= DAC33_I2C_ADDR_AUTOINC;
288 ret = codec->hw_write(codec->control_data, data, 3);
289 if (ret != 3)
290 dev_err(codec->dev, "Write failed (%d)\n", ret);
291 else
292 ret = 0;
293 }
294
295 return ret;
296 }
297
298 static void dac33_init_chip(struct snd_soc_codec *codec)
299 {
300 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
301
302 if (unlikely(!dac33->chip_power))
303 return;
304
305 /* 44-46: DAC Control Registers */
306 /* A : DAC sample rate Fsref/1.5 */
307 dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
308 /* B : DAC src=normal, not muted */
309 dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
310 DAC33_DACSRCL_LEFT);
311 /* C : (defaults) */
312 dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
313
314 /* 73 : volume soft stepping control,
315 clock source = internal osc (?) */
316 dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
317
318 dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
319
320 /* Restore only selected registers (gains mostly) */
321 dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
322 dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
323 dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
324 dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
325
326 dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
327 dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
328 dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
329 dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
330 }
331
332 static inline void dac33_read_id(struct snd_soc_codec *codec)
333 {
334 u8 reg;
335
336 dac33_read(codec, DAC33_DEVICE_ID_MSB, &reg);
337 dac33_read(codec, DAC33_DEVICE_ID_LSB, &reg);
338 dac33_read(codec, DAC33_DEVICE_REV_ID, &reg);
339 }
340
341 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
342 {
343 u8 reg;
344
345 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
346 if (power)
347 reg |= DAC33_PDNALLB;
348 else
349 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
350 DAC33_DACRPDNB | DAC33_DACLPDNB);
351 dac33_write(codec, DAC33_PWR_CTRL, reg);
352 }
353
354 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
355 {
356 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
357 int ret = 0;
358
359 mutex_lock(&dac33->mutex);
360
361 /* Safety check */
362 if (unlikely(power == dac33->chip_power)) {
363 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
364 power ? "ON" : "OFF");
365 goto exit;
366 }
367
368 if (power) {
369 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
370 dac33->supplies);
371 if (ret != 0) {
372 dev_err(codec->dev,
373 "Failed to enable supplies: %d\n", ret);
374 goto exit;
375 }
376
377 if (dac33->power_gpio >= 0)
378 gpio_set_value(dac33->power_gpio, 1);
379
380 dac33->chip_power = 1;
381 } else {
382 dac33_soft_power(codec, 0);
383 if (dac33->power_gpio >= 0)
384 gpio_set_value(dac33->power_gpio, 0);
385
386 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
387 dac33->supplies);
388 if (ret != 0) {
389 dev_err(codec->dev,
390 "Failed to disable supplies: %d\n", ret);
391 goto exit;
392 }
393
394 dac33->chip_power = 0;
395 }
396
397 exit:
398 mutex_unlock(&dac33->mutex);
399 return ret;
400 }
401
402 static int playback_event(struct snd_soc_dapm_widget *w,
403 struct snd_kcontrol *kcontrol, int event)
404 {
405 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec);
406
407 switch (event) {
408 case SND_SOC_DAPM_PRE_PMU:
409 if (likely(dac33->substream)) {
410 dac33_calculate_times(dac33->substream);
411 dac33_prepare_chip(dac33->substream);
412 }
413 break;
414 }
415 return 0;
416 }
417
418 static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
419 struct snd_ctl_elem_value *ucontrol)
420 {
421 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
422 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
423
424 ucontrol->value.integer.value[0] = dac33->nsample;
425
426 return 0;
427 }
428
429 static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
430 struct snd_ctl_elem_value *ucontrol)
431 {
432 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
433 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
434 int ret = 0;
435
436 if (dac33->nsample == ucontrol->value.integer.value[0])
437 return 0;
438
439 if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
440 ucontrol->value.integer.value[0] > dac33->nsample_max) {
441 ret = -EINVAL;
442 } else {
443 dac33->nsample = ucontrol->value.integer.value[0];
444 /* Re calculate the burst time */
445 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
446 dac33->nsample);
447 }
448
449 return ret;
450 }
451
452 static int dac33_get_uthr(struct snd_kcontrol *kcontrol,
453 struct snd_ctl_elem_value *ucontrol)
454 {
455 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
456 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
457
458 ucontrol->value.integer.value[0] = dac33->uthr;
459
460 return 0;
461 }
462
463 static int dac33_set_uthr(struct snd_kcontrol *kcontrol,
464 struct snd_ctl_elem_value *ucontrol)
465 {
466 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
467 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
468 int ret = 0;
469
470 if (dac33->substream)
471 return -EBUSY;
472
473 if (dac33->uthr == ucontrol->value.integer.value[0])
474 return 0;
475
476 if (ucontrol->value.integer.value[0] < (MODE7_LTHR + 10) ||
477 ucontrol->value.integer.value[0] > MODE7_UTHR)
478 ret = -EINVAL;
479 else
480 dac33->uthr = ucontrol->value.integer.value[0];
481
482 return ret;
483 }
484
485 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
486 struct snd_ctl_elem_value *ucontrol)
487 {
488 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
489 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
490
491 ucontrol->value.integer.value[0] = dac33->fifo_mode;
492
493 return 0;
494 }
495
496 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
497 struct snd_ctl_elem_value *ucontrol)
498 {
499 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
500 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
501 int ret = 0;
502
503 if (dac33->fifo_mode == ucontrol->value.integer.value[0])
504 return 0;
505 /* Do not allow changes while stream is running*/
506 if (codec->active)
507 return -EPERM;
508
509 if (ucontrol->value.integer.value[0] < 0 ||
510 ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
511 ret = -EINVAL;
512 else
513 dac33->fifo_mode = ucontrol->value.integer.value[0];
514
515 return ret;
516 }
517
518 /* Codec operation modes */
519 static const char *dac33_fifo_mode_texts[] = {
520 "Bypass", "Mode 1", "Mode 7"
521 };
522
523 static const struct soc_enum dac33_fifo_mode_enum =
524 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
525 dac33_fifo_mode_texts);
526
527 /*
528 * DACL/R digital volume control:
529 * from 0 dB to -63.5 in 0.5 dB steps
530 * Need to be inverted later on:
531 * 0x00 == 0 dB
532 * 0x7f == -63.5 dB
533 */
534 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
535
536 static const struct snd_kcontrol_new dac33_snd_controls[] = {
537 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
538 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
539 0, 0x7f, 1, dac_digivol_tlv),
540 SOC_DOUBLE_R("DAC Digital Playback Switch",
541 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
542 SOC_DOUBLE_R("Line to Line Out Volume",
543 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
544 };
545
546 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
547 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
548 dac33_get_fifo_mode, dac33_set_fifo_mode),
549 };
550
551 static const struct snd_kcontrol_new dac33_fifo_snd_controls[] = {
552 SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
553 dac33_get_nsample, dac33_set_nsample),
554 SOC_SINGLE_EXT("UTHR", 0, 0, MODE7_UTHR, 0,
555 dac33_get_uthr, dac33_set_uthr),
556 };
557
558 /* Analog bypass */
559 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
560 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
561
562 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
563 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
564
565 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
566 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
567 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
568
569 SND_SOC_DAPM_INPUT("LINEL"),
570 SND_SOC_DAPM_INPUT("LINER"),
571
572 SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
573 SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
574
575 /* Analog bypass */
576 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
577 &dac33_dapm_abypassl_control),
578 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
579 &dac33_dapm_abypassr_control),
580
581 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
582 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
583 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
584 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
585
586 SND_SOC_DAPM_PRE("Prepare Playback", playback_event),
587 };
588
589 static const struct snd_soc_dapm_route audio_map[] = {
590 /* Analog bypass */
591 {"Analog Left Bypass", "Switch", "LINEL"},
592 {"Analog Right Bypass", "Switch", "LINER"},
593
594 {"Output Left Amp Power", NULL, "DACL"},
595 {"Output Right Amp Power", NULL, "DACR"},
596
597 {"Output Left Amp Power", NULL, "Analog Left Bypass"},
598 {"Output Right Amp Power", NULL, "Analog Right Bypass"},
599
600 /* output */
601 {"LEFT_LO", NULL, "Output Left Amp Power"},
602 {"RIGHT_LO", NULL, "Output Right Amp Power"},
603 };
604
605 static int dac33_add_widgets(struct snd_soc_codec *codec)
606 {
607 snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
608 ARRAY_SIZE(dac33_dapm_widgets));
609
610 /* set up audio path interconnects */
611 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
612
613 return 0;
614 }
615
616 static int dac33_set_bias_level(struct snd_soc_codec *codec,
617 enum snd_soc_bias_level level)
618 {
619 int ret;
620
621 switch (level) {
622 case SND_SOC_BIAS_ON:
623 dac33_soft_power(codec, 1);
624 break;
625 case SND_SOC_BIAS_PREPARE:
626 break;
627 case SND_SOC_BIAS_STANDBY:
628 if (codec->bias_level == SND_SOC_BIAS_OFF) {
629 /* Coming from OFF, switch on the codec */
630 ret = dac33_hard_power(codec, 1);
631 if (ret != 0)
632 return ret;
633
634 dac33_init_chip(codec);
635 }
636 break;
637 case SND_SOC_BIAS_OFF:
638 /* Do not power off, when the codec is already off */
639 if (codec->bias_level == SND_SOC_BIAS_OFF)
640 return 0;
641 ret = dac33_hard_power(codec, 0);
642 if (ret != 0)
643 return ret;
644 break;
645 }
646 codec->bias_level = level;
647
648 return 0;
649 }
650
651 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
652 {
653 struct snd_soc_codec *codec = dac33->codec;
654
655 switch (dac33->fifo_mode) {
656 case DAC33_FIFO_MODE1:
657 dac33_write16(codec, DAC33_NSAMPLE_MSB,
658 DAC33_THRREG(dac33->nsample));
659
660 /* Take the timestamps */
661 spin_lock_irq(&dac33->lock);
662 dac33->t_stamp2 = ktime_to_us(ktime_get());
663 dac33->t_stamp1 = dac33->t_stamp2;
664 spin_unlock_irq(&dac33->lock);
665
666 dac33_write16(codec, DAC33_PREFILL_MSB,
667 DAC33_THRREG(dac33->alarm_threshold));
668 /* Enable Alarm Threshold IRQ with a delay */
669 udelay(SAMPLES_TO_US(dac33->burst_rate,
670 dac33->alarm_threshold));
671 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
672 break;
673 case DAC33_FIFO_MODE7:
674 /* Take the timestamp */
675 spin_lock_irq(&dac33->lock);
676 dac33->t_stamp1 = ktime_to_us(ktime_get());
677 /* Move back the timestamp with drain time */
678 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
679 spin_unlock_irq(&dac33->lock);
680
681 dac33_write16(codec, DAC33_PREFILL_MSB,
682 DAC33_THRREG(MODE7_LTHR));
683
684 /* Enable Upper Threshold IRQ */
685 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
686 break;
687 default:
688 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
689 dac33->fifo_mode);
690 break;
691 }
692 }
693
694 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
695 {
696 struct snd_soc_codec *codec = dac33->codec;
697
698 switch (dac33->fifo_mode) {
699 case DAC33_FIFO_MODE1:
700 /* Take the timestamp */
701 spin_lock_irq(&dac33->lock);
702 dac33->t_stamp2 = ktime_to_us(ktime_get());
703 spin_unlock_irq(&dac33->lock);
704
705 dac33_write16(codec, DAC33_NSAMPLE_MSB,
706 DAC33_THRREG(dac33->nsample));
707 break;
708 case DAC33_FIFO_MODE7:
709 /* At the moment we are not using interrupts in mode7 */
710 break;
711 default:
712 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
713 dac33->fifo_mode);
714 break;
715 }
716 }
717
718 static void dac33_work(struct work_struct *work)
719 {
720 struct snd_soc_codec *codec;
721 struct tlv320dac33_priv *dac33;
722 u8 reg;
723
724 dac33 = container_of(work, struct tlv320dac33_priv, work);
725 codec = dac33->codec;
726
727 mutex_lock(&dac33->mutex);
728 switch (dac33->state) {
729 case DAC33_PREFILL:
730 dac33->state = DAC33_PLAYBACK;
731 dac33_prefill_handler(dac33);
732 break;
733 case DAC33_PLAYBACK:
734 dac33_playback_handler(dac33);
735 break;
736 case DAC33_IDLE:
737 break;
738 case DAC33_FLUSH:
739 dac33->state = DAC33_IDLE;
740 /* Mask all interrupts from dac33 */
741 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
742
743 /* flush fifo */
744 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
745 reg |= DAC33_FIFOFLUSH;
746 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
747 break;
748 }
749 mutex_unlock(&dac33->mutex);
750 }
751
752 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
753 {
754 struct snd_soc_codec *codec = dev;
755 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
756
757 spin_lock(&dac33->lock);
758 dac33->t_stamp1 = ktime_to_us(ktime_get());
759 spin_unlock(&dac33->lock);
760
761 /* Do not schedule the workqueue in Mode7 */
762 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
763 queue_work(dac33->dac33_wq, &dac33->work);
764
765 return IRQ_HANDLED;
766 }
767
768 static void dac33_oscwait(struct snd_soc_codec *codec)
769 {
770 int timeout = 20;
771 u8 reg;
772
773 do {
774 msleep(1);
775 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
776 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
777 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
778 dev_err(codec->dev,
779 "internal oscillator calibration failed\n");
780 }
781
782 static int dac33_startup(struct snd_pcm_substream *substream,
783 struct snd_soc_dai *dai)
784 {
785 struct snd_soc_pcm_runtime *rtd = substream->private_data;
786 struct snd_soc_codec *codec = rtd->codec;
787 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
788
789 /* Stream started, save the substream pointer */
790 dac33->substream = substream;
791
792 return 0;
793 }
794
795 static void dac33_shutdown(struct snd_pcm_substream *substream,
796 struct snd_soc_dai *dai)
797 {
798 struct snd_soc_pcm_runtime *rtd = substream->private_data;
799 struct snd_soc_codec *codec = rtd->codec;
800 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
801
802 dac33->substream = NULL;
803
804 /* Reset the nSample restrictions */
805 dac33->nsample_min = 0;
806 dac33->nsample_max = NSAMPLE_MAX;
807 }
808
809 static int dac33_hw_params(struct snd_pcm_substream *substream,
810 struct snd_pcm_hw_params *params,
811 struct snd_soc_dai *dai)
812 {
813 struct snd_soc_pcm_runtime *rtd = substream->private_data;
814 struct snd_soc_codec *codec = rtd->codec;
815
816 /* Check parameters for validity */
817 switch (params_rate(params)) {
818 case 44100:
819 case 48000:
820 break;
821 default:
822 dev_err(codec->dev, "unsupported rate %d\n",
823 params_rate(params));
824 return -EINVAL;
825 }
826
827 switch (params_format(params)) {
828 case SNDRV_PCM_FORMAT_S16_LE:
829 break;
830 default:
831 dev_err(codec->dev, "unsupported format %d\n",
832 params_format(params));
833 return -EINVAL;
834 }
835
836 return 0;
837 }
838
839 #define CALC_OSCSET(rate, refclk) ( \
840 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
841 #define CALC_RATIOSET(rate, refclk) ( \
842 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
843
844 /*
845 * tlv320dac33 is strict on the sequence of the register writes, if the register
846 * writes happens in different order, than dac33 might end up in unknown state.
847 * Use the known, working sequence of register writes to initialize the dac33.
848 */
849 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
850 {
851 struct snd_soc_pcm_runtime *rtd = substream->private_data;
852 struct snd_soc_codec *codec = rtd->codec;
853 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
854 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
855 u8 aictrl_a, aictrl_b, fifoctrl_a;
856
857 switch (substream->runtime->rate) {
858 case 44100:
859 case 48000:
860 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
861 ratioset = CALC_RATIOSET(substream->runtime->rate,
862 dac33->refclk);
863 break;
864 default:
865 dev_err(codec->dev, "unsupported rate %d\n",
866 substream->runtime->rate);
867 return -EINVAL;
868 }
869
870
871 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
872 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
873 /* Read FIFO control A, and clear FIFO flush bit */
874 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
875 fifoctrl_a &= ~DAC33_FIFOFLUSH;
876
877 fifoctrl_a &= ~DAC33_WIDTH;
878 switch (substream->runtime->format) {
879 case SNDRV_PCM_FORMAT_S16_LE:
880 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
881 fifoctrl_a |= DAC33_WIDTH;
882 break;
883 default:
884 dev_err(codec->dev, "unsupported format %d\n",
885 substream->runtime->format);
886 return -EINVAL;
887 }
888
889 mutex_lock(&dac33->mutex);
890
891 if (!dac33->chip_power) {
892 /*
893 * Chip is not powered yet.
894 * Do the init in the dac33_set_bias_level later.
895 */
896 mutex_unlock(&dac33->mutex);
897 return 0;
898 }
899
900 dac33_soft_power(codec, 0);
901 dac33_soft_power(codec, 1);
902
903 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
904 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
905
906 /* Write registers 0x08 and 0x09 (MSB, LSB) */
907 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
908
909 /* calib time: 128 is a nice number ;) */
910 dac33_write(codec, DAC33_CALIB_TIME, 128);
911
912 /* adjustment treshold & step */
913 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
914 DAC33_ADJSTEP(1));
915
916 /* div=4 / gain=1 / div */
917 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
918
919 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
920 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
921 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
922
923 dac33_oscwait(codec);
924
925 if (dac33->fifo_mode) {
926 /* Generic for all FIFO modes */
927 /* 50-51 : ASRC Control registers */
928 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
929 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
930
931 /* Write registers 0x34 and 0x35 (MSB, LSB) */
932 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
933
934 /* Set interrupts to high active */
935 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
936 } else {
937 /* FIFO bypass mode */
938 /* 50-51 : ASRC Control registers */
939 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
940 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
941 }
942
943 /* Interrupt behaviour configuration */
944 switch (dac33->fifo_mode) {
945 case DAC33_FIFO_MODE1:
946 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
947 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
948 break;
949 case DAC33_FIFO_MODE7:
950 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
951 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
952 break;
953 default:
954 /* in FIFO bypass mode, the interrupts are not used */
955 break;
956 }
957
958 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
959
960 switch (dac33->fifo_mode) {
961 case DAC33_FIFO_MODE1:
962 /*
963 * For mode1:
964 * Disable the FIFO bypass (Enable the use of FIFO)
965 * Select nSample mode
966 * BCLK is only running when data is needed by DAC33
967 */
968 fifoctrl_a &= ~DAC33_FBYPAS;
969 fifoctrl_a &= ~DAC33_FAUTO;
970 if (dac33->keep_bclk)
971 aictrl_b |= DAC33_BCLKON;
972 else
973 aictrl_b &= ~DAC33_BCLKON;
974 break;
975 case DAC33_FIFO_MODE7:
976 /*
977 * For mode1:
978 * Disable the FIFO bypass (Enable the use of FIFO)
979 * Select Threshold mode
980 * BCLK is only running when data is needed by DAC33
981 */
982 fifoctrl_a &= ~DAC33_FBYPAS;
983 fifoctrl_a |= DAC33_FAUTO;
984 if (dac33->keep_bclk)
985 aictrl_b |= DAC33_BCLKON;
986 else
987 aictrl_b &= ~DAC33_BCLKON;
988 break;
989 default:
990 /*
991 * For FIFO bypass mode:
992 * Enable the FIFO bypass (Disable the FIFO use)
993 * Set the BCLK as continous
994 */
995 fifoctrl_a |= DAC33_FBYPAS;
996 aictrl_b |= DAC33_BCLKON;
997 break;
998 }
999
1000 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1001 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1002 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1003
1004 /*
1005 * BCLK divide ratio
1006 * 0: 1.5
1007 * 1: 1
1008 * 2: 2
1009 * ...
1010 * 254: 254
1011 * 255: 255
1012 */
1013 if (dac33->fifo_mode)
1014 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1015 dac33->burst_bclkdiv);
1016 else
1017 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1018
1019 switch (dac33->fifo_mode) {
1020 case DAC33_FIFO_MODE1:
1021 dac33_write16(codec, DAC33_ATHR_MSB,
1022 DAC33_THRREG(dac33->alarm_threshold));
1023 break;
1024 case DAC33_FIFO_MODE7:
1025 /*
1026 * Configure the threshold levels, and leave 10 sample space
1027 * at the bottom, and also at the top of the FIFO
1028 */
1029 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1030 dac33_write16(codec, DAC33_LTHR_MSB, DAC33_THRREG(MODE7_LTHR));
1031 break;
1032 default:
1033 break;
1034 }
1035
1036 mutex_unlock(&dac33->mutex);
1037
1038 return 0;
1039 }
1040
1041 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1042 {
1043 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1044 struct snd_soc_codec *codec = rtd->codec;
1045 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1046 unsigned int period_size = substream->runtime->period_size;
1047 unsigned int rate = substream->runtime->rate;
1048 unsigned int nsample_limit;
1049
1050 /* In bypass mode we don't need to calculate */
1051 if (!dac33->fifo_mode)
1052 return;
1053
1054 switch (dac33->fifo_mode) {
1055 case DAC33_FIFO_MODE1:
1056 /* Number of samples under i2c latency */
1057 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1058 dac33->mode1_latency);
1059 if (dac33->auto_fifo_config) {
1060 if (period_size <= dac33->alarm_threshold)
1061 /*
1062 * Configure nSamaple to number of periods,
1063 * which covers the latency requironment.
1064 */
1065 dac33->nsample = period_size *
1066 ((dac33->alarm_threshold / period_size) +
1067 (dac33->alarm_threshold % period_size ?
1068 1 : 0));
1069 else
1070 dac33->nsample = period_size;
1071 } else {
1072 /* nSample time shall not be shorter than i2c latency */
1073 dac33->nsample_min = dac33->alarm_threshold;
1074 /*
1075 * nSample should not be bigger than alsa buffer minus
1076 * size of one period to avoid overruns
1077 */
1078 dac33->nsample_max = substream->runtime->buffer_size -
1079 period_size;
1080 nsample_limit = DAC33_BUFFER_SIZE_SAMPLES -
1081 dac33->alarm_threshold;
1082 if (dac33->nsample_max > nsample_limit)
1083 dac33->nsample_max = nsample_limit;
1084
1085 /* Correct the nSample if it is outside of the ranges */
1086 if (dac33->nsample < dac33->nsample_min)
1087 dac33->nsample = dac33->nsample_min;
1088 if (dac33->nsample > dac33->nsample_max)
1089 dac33->nsample = dac33->nsample_max;
1090 }
1091
1092 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1093 dac33->nsample);
1094 dac33->t_stamp1 = 0;
1095 dac33->t_stamp2 = 0;
1096 break;
1097 case DAC33_FIFO_MODE7:
1098 if (dac33->auto_fifo_config) {
1099 dac33->uthr = UTHR_FROM_PERIOD_SIZE(
1100 period_size,
1101 rate,
1102 dac33->burst_rate) + 9;
1103 if (dac33->uthr > MODE7_UTHR)
1104 dac33->uthr = MODE7_UTHR;
1105 if (dac33->uthr < (MODE7_LTHR + 10))
1106 dac33->uthr = (MODE7_LTHR + 10);
1107 }
1108 dac33->mode7_us_to_lthr =
1109 SAMPLES_TO_US(substream->runtime->rate,
1110 dac33->uthr - MODE7_LTHR + 1);
1111 dac33->t_stamp1 = 0;
1112 break;
1113 default:
1114 break;
1115 }
1116
1117 }
1118
1119 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1120 struct snd_soc_dai *dai)
1121 {
1122 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1123 struct snd_soc_codec *codec = rtd->codec;
1124 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1125 int ret = 0;
1126
1127 switch (cmd) {
1128 case SNDRV_PCM_TRIGGER_START:
1129 case SNDRV_PCM_TRIGGER_RESUME:
1130 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1131 if (dac33->fifo_mode) {
1132 dac33->state = DAC33_PREFILL;
1133 queue_work(dac33->dac33_wq, &dac33->work);
1134 }
1135 break;
1136 case SNDRV_PCM_TRIGGER_STOP:
1137 case SNDRV_PCM_TRIGGER_SUSPEND:
1138 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1139 if (dac33->fifo_mode) {
1140 dac33->state = DAC33_FLUSH;
1141 queue_work(dac33->dac33_wq, &dac33->work);
1142 }
1143 break;
1144 default:
1145 ret = -EINVAL;
1146 }
1147
1148 return ret;
1149 }
1150
1151 static snd_pcm_sframes_t dac33_dai_delay(
1152 struct snd_pcm_substream *substream,
1153 struct snd_soc_dai *dai)
1154 {
1155 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1156 struct snd_soc_codec *codec = rtd->codec;
1157 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1158 unsigned long long t0, t1, t_now;
1159 unsigned int time_delta, uthr;
1160 int samples_out, samples_in, samples;
1161 snd_pcm_sframes_t delay = 0;
1162
1163 switch (dac33->fifo_mode) {
1164 case DAC33_FIFO_BYPASS:
1165 break;
1166 case DAC33_FIFO_MODE1:
1167 spin_lock(&dac33->lock);
1168 t0 = dac33->t_stamp1;
1169 t1 = dac33->t_stamp2;
1170 spin_unlock(&dac33->lock);
1171 t_now = ktime_to_us(ktime_get());
1172
1173 /* We have not started to fill the FIFO yet, delay is 0 */
1174 if (!t1)
1175 goto out;
1176
1177 if (t0 > t1) {
1178 /*
1179 * Phase 1:
1180 * After Alarm threshold, and before nSample write
1181 */
1182 time_delta = t_now - t0;
1183 samples_out = time_delta ? US_TO_SAMPLES(
1184 substream->runtime->rate,
1185 time_delta) : 0;
1186
1187 if (likely(dac33->alarm_threshold > samples_out))
1188 delay = dac33->alarm_threshold - samples_out;
1189 else
1190 delay = 0;
1191 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1192 /*
1193 * Phase 2:
1194 * After nSample write (during burst operation)
1195 */
1196 time_delta = t_now - t0;
1197 samples_out = time_delta ? US_TO_SAMPLES(
1198 substream->runtime->rate,
1199 time_delta) : 0;
1200
1201 time_delta = t_now - t1;
1202 samples_in = time_delta ? US_TO_SAMPLES(
1203 dac33->burst_rate,
1204 time_delta) : 0;
1205
1206 samples = dac33->alarm_threshold;
1207 samples += (samples_in - samples_out);
1208
1209 if (likely(samples > 0))
1210 delay = samples;
1211 else
1212 delay = 0;
1213 } else {
1214 /*
1215 * Phase 3:
1216 * After burst operation, before next alarm threshold
1217 */
1218 time_delta = t_now - t0;
1219 samples_out = time_delta ? US_TO_SAMPLES(
1220 substream->runtime->rate,
1221 time_delta) : 0;
1222
1223 samples_in = dac33->nsample;
1224 samples = dac33->alarm_threshold;
1225 samples += (samples_in - samples_out);
1226
1227 if (likely(samples > 0))
1228 delay = samples > DAC33_BUFFER_SIZE_SAMPLES ?
1229 DAC33_BUFFER_SIZE_SAMPLES : samples;
1230 else
1231 delay = 0;
1232 }
1233 break;
1234 case DAC33_FIFO_MODE7:
1235 spin_lock(&dac33->lock);
1236 t0 = dac33->t_stamp1;
1237 uthr = dac33->uthr;
1238 spin_unlock(&dac33->lock);
1239 t_now = ktime_to_us(ktime_get());
1240
1241 /* We have not started to fill the FIFO yet, delay is 0 */
1242 if (!t0)
1243 goto out;
1244
1245 if (t_now <= t0) {
1246 /*
1247 * Either the timestamps are messed or equal. Report
1248 * maximum delay
1249 */
1250 delay = uthr;
1251 goto out;
1252 }
1253
1254 time_delta = t_now - t0;
1255 if (time_delta <= dac33->mode7_us_to_lthr) {
1256 /*
1257 * Phase 1:
1258 * After burst (draining phase)
1259 */
1260 samples_out = US_TO_SAMPLES(
1261 substream->runtime->rate,
1262 time_delta);
1263
1264 if (likely(uthr > samples_out))
1265 delay = uthr - samples_out;
1266 else
1267 delay = 0;
1268 } else {
1269 /*
1270 * Phase 2:
1271 * During burst operation
1272 */
1273 time_delta = time_delta - dac33->mode7_us_to_lthr;
1274
1275 samples_out = US_TO_SAMPLES(
1276 substream->runtime->rate,
1277 time_delta);
1278 samples_in = US_TO_SAMPLES(
1279 dac33->burst_rate,
1280 time_delta);
1281 delay = MODE7_LTHR + samples_in - samples_out;
1282
1283 if (unlikely(delay > uthr))
1284 delay = uthr;
1285 }
1286 break;
1287 default:
1288 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1289 dac33->fifo_mode);
1290 break;
1291 }
1292 out:
1293 return delay;
1294 }
1295
1296 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1297 int clk_id, unsigned int freq, int dir)
1298 {
1299 struct snd_soc_codec *codec = codec_dai->codec;
1300 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1301 u8 ioc_reg, asrcb_reg;
1302
1303 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1304 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1305 switch (clk_id) {
1306 case TLV320DAC33_MCLK:
1307 ioc_reg |= DAC33_REFSEL;
1308 asrcb_reg |= DAC33_SRCREFSEL;
1309 break;
1310 case TLV320DAC33_SLEEPCLK:
1311 ioc_reg &= ~DAC33_REFSEL;
1312 asrcb_reg &= ~DAC33_SRCREFSEL;
1313 break;
1314 default:
1315 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1316 break;
1317 }
1318 dac33->refclk = freq;
1319
1320 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1321 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1322
1323 return 0;
1324 }
1325
1326 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1327 unsigned int fmt)
1328 {
1329 struct snd_soc_codec *codec = codec_dai->codec;
1330 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1331 u8 aictrl_a, aictrl_b;
1332
1333 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1334 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1335 /* set master/slave audio interface */
1336 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1337 case SND_SOC_DAIFMT_CBM_CFM:
1338 /* Codec Master */
1339 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1340 break;
1341 case SND_SOC_DAIFMT_CBS_CFS:
1342 /* Codec Slave */
1343 if (dac33->fifo_mode) {
1344 dev_err(codec->dev, "FIFO mode requires master mode\n");
1345 return -EINVAL;
1346 } else
1347 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1348 break;
1349 default:
1350 return -EINVAL;
1351 }
1352
1353 aictrl_a &= ~DAC33_AFMT_MASK;
1354 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1355 case SND_SOC_DAIFMT_I2S:
1356 aictrl_a |= DAC33_AFMT_I2S;
1357 break;
1358 case SND_SOC_DAIFMT_DSP_A:
1359 aictrl_a |= DAC33_AFMT_DSP;
1360 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1361 aictrl_b |= DAC33_DATA_DELAY(0);
1362 break;
1363 case SND_SOC_DAIFMT_RIGHT_J:
1364 aictrl_a |= DAC33_AFMT_RIGHT_J;
1365 break;
1366 case SND_SOC_DAIFMT_LEFT_J:
1367 aictrl_a |= DAC33_AFMT_LEFT_J;
1368 break;
1369 default:
1370 dev_err(codec->dev, "Unsupported format (%u)\n",
1371 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1372 return -EINVAL;
1373 }
1374
1375 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1376 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1377
1378 return 0;
1379 }
1380
1381 static int dac33_soc_probe(struct snd_soc_codec *codec)
1382 {
1383 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1384 int ret = 0;
1385
1386 codec->control_data = dac33->control_data;
1387 codec->hw_write = (hw_write_t) i2c_master_send;
1388 codec->bias_level = SND_SOC_BIAS_OFF;
1389 codec->idle_bias_off = 1;
1390 dac33->codec = codec;
1391
1392 /* Read the tlv320dac33 ID registers */
1393 ret = dac33_hard_power(codec, 1);
1394 if (ret != 0) {
1395 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1396 goto err_power;
1397 }
1398 dac33_read_id(codec);
1399 dac33_hard_power(codec, 0);
1400
1401 /* Check if the IRQ number is valid and request it */
1402 if (dac33->irq >= 0) {
1403 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1404 IRQF_TRIGGER_RISING | IRQF_DISABLED,
1405 codec->name, codec);
1406 if (ret < 0) {
1407 dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1408 dac33->irq, ret);
1409 dac33->irq = -1;
1410 }
1411 if (dac33->irq != -1) {
1412 /* Setup work queue */
1413 dac33->dac33_wq =
1414 create_singlethread_workqueue("tlv320dac33");
1415 if (dac33->dac33_wq == NULL) {
1416 free_irq(dac33->irq, codec);
1417 return -ENOMEM;
1418 }
1419
1420 INIT_WORK(&dac33->work, dac33_work);
1421 }
1422 }
1423
1424 snd_soc_add_controls(codec, dac33_snd_controls,
1425 ARRAY_SIZE(dac33_snd_controls));
1426 /* Only add the FIFO controls, if we have valid IRQ number */
1427 if (dac33->irq >= 0) {
1428 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1429 ARRAY_SIZE(dac33_mode_snd_controls));
1430 /* FIFO usage controls only, if autoio config is not selected */
1431 if (!dac33->auto_fifo_config)
1432 snd_soc_add_controls(codec, dac33_fifo_snd_controls,
1433 ARRAY_SIZE(dac33_fifo_snd_controls));
1434 }
1435 dac33_add_widgets(codec);
1436
1437 err_power:
1438 return ret;
1439 }
1440
1441 static int dac33_soc_remove(struct snd_soc_codec *codec)
1442 {
1443 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1444
1445 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1446
1447 if (dac33->irq >= 0) {
1448 free_irq(dac33->irq, dac33->codec);
1449 destroy_workqueue(dac33->dac33_wq);
1450 }
1451 return 0;
1452 }
1453
1454 static int dac33_soc_suspend(struct snd_soc_codec *codec, pm_message_t state)
1455 {
1456 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1457
1458 return 0;
1459 }
1460
1461 static int dac33_soc_resume(struct snd_soc_codec *codec)
1462 {
1463 dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1464
1465 return 0;
1466 }
1467
1468 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1469 .read = dac33_read_reg_cache,
1470 .write = dac33_write_locked,
1471 .set_bias_level = dac33_set_bias_level,
1472 .reg_cache_size = ARRAY_SIZE(dac33_reg),
1473 .reg_word_size = sizeof(u8),
1474 .reg_cache_default = dac33_reg,
1475 .probe = dac33_soc_probe,
1476 .remove = dac33_soc_remove,
1477 .suspend = dac33_soc_suspend,
1478 .resume = dac33_soc_resume,
1479 };
1480
1481 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1482 SNDRV_PCM_RATE_48000)
1483 #define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE
1484
1485 static struct snd_soc_dai_ops dac33_dai_ops = {
1486 .startup = dac33_startup,
1487 .shutdown = dac33_shutdown,
1488 .hw_params = dac33_hw_params,
1489 .trigger = dac33_pcm_trigger,
1490 .delay = dac33_dai_delay,
1491 .set_sysclk = dac33_set_dai_sysclk,
1492 .set_fmt = dac33_set_dai_fmt,
1493 };
1494
1495 static struct snd_soc_dai_driver dac33_dai = {
1496 .name = "tlv320dac33-hifi",
1497 .playback = {
1498 .stream_name = "Playback",
1499 .channels_min = 2,
1500 .channels_max = 2,
1501 .rates = DAC33_RATES,
1502 .formats = DAC33_FORMATS,},
1503 .ops = &dac33_dai_ops,
1504 };
1505
1506 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1507 const struct i2c_device_id *id)
1508 {
1509 struct tlv320dac33_platform_data *pdata;
1510 struct tlv320dac33_priv *dac33;
1511 int ret, i;
1512
1513 if (client->dev.platform_data == NULL) {
1514 dev_err(&client->dev, "Platform data not set\n");
1515 return -ENODEV;
1516 }
1517 pdata = client->dev.platform_data;
1518
1519 dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1520 if (dac33 == NULL)
1521 return -ENOMEM;
1522
1523 dac33->control_data = client;
1524 mutex_init(&dac33->mutex);
1525 spin_lock_init(&dac33->lock);
1526
1527 i2c_set_clientdata(client, dac33);
1528
1529 dac33->power_gpio = pdata->power_gpio;
1530 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1531 /* Pre calculate the burst rate */
1532 dac33->burst_rate = BURST_BASEFREQ_HZ / dac33->burst_bclkdiv / 32;
1533 dac33->keep_bclk = pdata->keep_bclk;
1534 dac33->auto_fifo_config = pdata->auto_fifo_config;
1535 dac33->mode1_latency = pdata->mode1_latency;
1536 if (!dac33->mode1_latency)
1537 dac33->mode1_latency = 10000; /* 10ms */
1538 dac33->irq = client->irq;
1539 dac33->nsample = NSAMPLE_MAX;
1540 dac33->nsample_max = NSAMPLE_MAX;
1541 dac33->uthr = MODE7_UTHR;
1542 /* Disable FIFO use by default */
1543 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1544
1545 /* Check if the reset GPIO number is valid and request it */
1546 if (dac33->power_gpio >= 0) {
1547 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1548 if (ret < 0) {
1549 dev_err(&client->dev,
1550 "Failed to request reset GPIO (%d)\n",
1551 dac33->power_gpio);
1552 goto err_gpio;
1553 }
1554 gpio_direction_output(dac33->power_gpio, 0);
1555 }
1556
1557 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1558 dac33->supplies[i].supply = dac33_supply_names[i];
1559
1560 ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1561 dac33->supplies);
1562
1563 if (ret != 0) {
1564 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1565 goto err_get;
1566 }
1567
1568 ret = snd_soc_register_codec(&client->dev,
1569 &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1570 if (ret < 0)
1571 goto err_register;
1572
1573 return ret;
1574 err_register:
1575 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1576 err_get:
1577 if (dac33->power_gpio >= 0)
1578 gpio_free(dac33->power_gpio);
1579 err_gpio:
1580 kfree(dac33);
1581 return ret;
1582 }
1583
1584 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1585 {
1586 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1587
1588 if (unlikely(dac33->chip_power))
1589 dac33_hard_power(dac33->codec, 0);
1590
1591 if (dac33->power_gpio >= 0)
1592 gpio_free(dac33->power_gpio);
1593
1594 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1595
1596 snd_soc_unregister_codec(&client->dev);
1597 kfree(dac33);
1598
1599 return 0;
1600 }
1601
1602 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1603 {
1604 .name = "tlv320dac33",
1605 .driver_data = 0,
1606 },
1607 { },
1608 };
1609
1610 static struct i2c_driver tlv320dac33_i2c_driver = {
1611 .driver = {
1612 .name = "tlv320dac33-codec",
1613 .owner = THIS_MODULE,
1614 },
1615 .probe = dac33_i2c_probe,
1616 .remove = __devexit_p(dac33_i2c_remove),
1617 .id_table = tlv320dac33_i2c_id,
1618 };
1619
1620 static int __init dac33_module_init(void)
1621 {
1622 int r;
1623 r = i2c_add_driver(&tlv320dac33_i2c_driver);
1624 if (r < 0) {
1625 printk(KERN_ERR "DAC33: driver registration failed\n");
1626 return r;
1627 }
1628 return 0;
1629 }
1630 module_init(dac33_module_init);
1631
1632 static void __exit dac33_module_exit(void)
1633 {
1634 i2c_del_driver(&tlv320dac33_i2c_driver);
1635 }
1636 module_exit(dac33_module_exit);
1637
1638
1639 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1640 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1641 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.063908 seconds and 5 git commands to generate.