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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / sound / soc / codecs / tlv320dac33.c
blob8651b01ed22358a636abdd7ba2c63e051ae95461
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 static struct snd_soc_codec *tlv320dac33_codec;
70
71 enum dac33_state {
72 DAC33_IDLE = 0,
73 DAC33_PREFILL,
74 DAC33_PLAYBACK,
75 DAC33_FLUSH,
76 };
77
78 enum dac33_fifo_modes {
79 DAC33_FIFO_BYPASS = 0,
80 DAC33_FIFO_MODE1,
81 DAC33_FIFO_MODE7,
82 DAC33_FIFO_LAST_MODE,
83 };
84
85 #define DAC33_NUM_SUPPLIES 3
86 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
87 "AVDD",
88 "DVDD",
89 "IOVDD",
90 };
91
92 struct tlv320dac33_priv {
93 struct mutex mutex;
94 struct workqueue_struct *dac33_wq;
95 struct work_struct work;
96 struct snd_soc_codec codec;
97 struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
98 struct snd_pcm_substream *substream;
99 int power_gpio;
100 int chip_power;
101 int irq;
102 unsigned int refclk;
103
104 unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
105 unsigned int nsample_min; /* nsample should not be lower than
106 * this */
107 unsigned int nsample_max; /* nsample should not be higher than
108 * this */
109 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
110 unsigned int nsample; /* burst read amount from host */
111 int mode1_latency; /* latency caused by the i2c writes in
112 * us */
113 int auto_fifo_config; /* Configure the FIFO based on the
114 * period size */
115 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
116 unsigned int burst_rate; /* Interface speed in Burst modes */
117
118 int keep_bclk; /* Keep the BCLK continuously running
119 * in FIFO modes */
120 spinlock_t lock;
121 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */
122 unsigned long long t_stamp2; /* calculate the FIFO caused delay */
123
124 unsigned int mode1_us_burst; /* Time to burst read n number of
125 * samples */
126 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */
127
128 unsigned int uthr;
129
130 enum dac33_state state;
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;
654
655 codec = &dac33->codec;
656
657 switch (dac33->fifo_mode) {
658 case DAC33_FIFO_MODE1:
659 dac33_write16(codec, DAC33_NSAMPLE_MSB,
660 DAC33_THRREG(dac33->nsample));
661
662 /* Take the timestamps */
663 spin_lock_irq(&dac33->lock);
664 dac33->t_stamp2 = ktime_to_us(ktime_get());
665 dac33->t_stamp1 = dac33->t_stamp2;
666 spin_unlock_irq(&dac33->lock);
667
668 dac33_write16(codec, DAC33_PREFILL_MSB,
669 DAC33_THRREG(dac33->alarm_threshold));
670 /* Enable Alarm Threshold IRQ with a delay */
671 udelay(SAMPLES_TO_US(dac33->burst_rate,
672 dac33->alarm_threshold));
673 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
674 break;
675 case DAC33_FIFO_MODE7:
676 /* Take the timestamp */
677 spin_lock_irq(&dac33->lock);
678 dac33->t_stamp1 = ktime_to_us(ktime_get());
679 /* Move back the timestamp with drain time */
680 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
681 spin_unlock_irq(&dac33->lock);
682
683 dac33_write16(codec, DAC33_PREFILL_MSB,
684 DAC33_THRREG(MODE7_LTHR));
685
686 /* Enable Upper Threshold IRQ */
687 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
688 break;
689 default:
690 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
691 dac33->fifo_mode);
692 break;
693 }
694 }
695
696 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
697 {
698 struct snd_soc_codec *codec;
699
700 codec = &dac33->codec;
701
702 switch (dac33->fifo_mode) {
703 case DAC33_FIFO_MODE1:
704 /* Take the timestamp */
705 spin_lock_irq(&dac33->lock);
706 dac33->t_stamp2 = ktime_to_us(ktime_get());
707 spin_unlock_irq(&dac33->lock);
708
709 dac33_write16(codec, DAC33_NSAMPLE_MSB,
710 DAC33_THRREG(dac33->nsample));
711 break;
712 case DAC33_FIFO_MODE7:
713 /* At the moment we are not using interrupts in mode7 */
714 break;
715 default:
716 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
717 dac33->fifo_mode);
718 break;
719 }
720 }
721
722 static void dac33_work(struct work_struct *work)
723 {
724 struct snd_soc_codec *codec;
725 struct tlv320dac33_priv *dac33;
726 u8 reg;
727
728 dac33 = container_of(work, struct tlv320dac33_priv, work);
729 codec = &dac33->codec;
730
731 mutex_lock(&dac33->mutex);
732 switch (dac33->state) {
733 case DAC33_PREFILL:
734 dac33->state = DAC33_PLAYBACK;
735 dac33_prefill_handler(dac33);
736 break;
737 case DAC33_PLAYBACK:
738 dac33_playback_handler(dac33);
739 break;
740 case DAC33_IDLE:
741 break;
742 case DAC33_FLUSH:
743 dac33->state = DAC33_IDLE;
744 /* Mask all interrupts from dac33 */
745 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
746
747 /* flush fifo */
748 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
749 reg |= DAC33_FIFOFLUSH;
750 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
751 break;
752 }
753 mutex_unlock(&dac33->mutex);
754 }
755
756 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
757 {
758 struct snd_soc_codec *codec = dev;
759 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
760
761 spin_lock(&dac33->lock);
762 dac33->t_stamp1 = ktime_to_us(ktime_get());
763 spin_unlock(&dac33->lock);
764
765 /* Do not schedule the workqueue in Mode7 */
766 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
767 queue_work(dac33->dac33_wq, &dac33->work);
768
769 return IRQ_HANDLED;
770 }
771
772 static void dac33_oscwait(struct snd_soc_codec *codec)
773 {
774 int timeout = 20;
775 u8 reg;
776
777 do {
778 msleep(1);
779 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
780 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
781 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
782 dev_err(codec->dev,
783 "internal oscillator calibration failed\n");
784 }
785
786 static int dac33_startup(struct snd_pcm_substream *substream,
787 struct snd_soc_dai *dai)
788 {
789 struct snd_soc_pcm_runtime *rtd = substream->private_data;
790 struct snd_soc_device *socdev = rtd->socdev;
791 struct snd_soc_codec *codec = socdev->card->codec;
792 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
793
794 /* Stream started, save the substream pointer */
795 dac33->substream = substream;
796
797 return 0;
798 }
799
800 static void dac33_shutdown(struct snd_pcm_substream *substream,
801 struct snd_soc_dai *dai)
802 {
803 struct snd_soc_pcm_runtime *rtd = substream->private_data;
804 struct snd_soc_device *socdev = rtd->socdev;
805 struct snd_soc_codec *codec = socdev->card->codec;
806 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
807
808 dac33->substream = NULL;
809
810 /* Reset the nSample restrictions */
811 dac33->nsample_min = 0;
812 dac33->nsample_max = NSAMPLE_MAX;
813 }
814
815 static int dac33_hw_params(struct snd_pcm_substream *substream,
816 struct snd_pcm_hw_params *params,
817 struct snd_soc_dai *dai)
818 {
819 struct snd_soc_pcm_runtime *rtd = substream->private_data;
820 struct snd_soc_device *socdev = rtd->socdev;
821 struct snd_soc_codec *codec = socdev->card->codec;
822
823 /* Check parameters for validity */
824 switch (params_rate(params)) {
825 case 44100:
826 case 48000:
827 break;
828 default:
829 dev_err(codec->dev, "unsupported rate %d\n",
830 params_rate(params));
831 return -EINVAL;
832 }
833
834 switch (params_format(params)) {
835 case SNDRV_PCM_FORMAT_S16_LE:
836 break;
837 default:
838 dev_err(codec->dev, "unsupported format %d\n",
839 params_format(params));
840 return -EINVAL;
841 }
842
843 return 0;
844 }
845
846 #define CALC_OSCSET(rate, refclk) ( \
847 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
848 #define CALC_RATIOSET(rate, refclk) ( \
849 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
850
851 /*
852 * tlv320dac33 is strict on the sequence of the register writes, if the register
853 * writes happens in different order, than dac33 might end up in unknown state.
854 * Use the known, working sequence of register writes to initialize the dac33.
855 */
856 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
857 {
858 struct snd_soc_pcm_runtime *rtd = substream->private_data;
859 struct snd_soc_device *socdev = rtd->socdev;
860 struct snd_soc_codec *codec = socdev->card->codec;
861 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
862 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
863 u8 aictrl_a, aictrl_b, fifoctrl_a;
864
865 switch (substream->runtime->rate) {
866 case 44100:
867 case 48000:
868 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
869 ratioset = CALC_RATIOSET(substream->runtime->rate,
870 dac33->refclk);
871 break;
872 default:
873 dev_err(codec->dev, "unsupported rate %d\n",
874 substream->runtime->rate);
875 return -EINVAL;
876 }
877
878
879 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
880 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
881 /* Read FIFO control A, and clear FIFO flush bit */
882 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
883 fifoctrl_a &= ~DAC33_FIFOFLUSH;
884
885 fifoctrl_a &= ~DAC33_WIDTH;
886 switch (substream->runtime->format) {
887 case SNDRV_PCM_FORMAT_S16_LE:
888 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
889 fifoctrl_a |= DAC33_WIDTH;
890 break;
891 default:
892 dev_err(codec->dev, "unsupported format %d\n",
893 substream->runtime->format);
894 return -EINVAL;
895 }
896
897 mutex_lock(&dac33->mutex);
898
899 if (!dac33->chip_power) {
900 /*
901 * Chip is not powered yet.
902 * Do the init in the dac33_set_bias_level later.
903 */
904 mutex_unlock(&dac33->mutex);
905 return 0;
906 }
907
908 dac33_soft_power(codec, 0);
909 dac33_soft_power(codec, 1);
910
911 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
912 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
913
914 /* Write registers 0x08 and 0x09 (MSB, LSB) */
915 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
916
917 /* calib time: 128 is a nice number ;) */
918 dac33_write(codec, DAC33_CALIB_TIME, 128);
919
920 /* adjustment treshold & step */
921 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
922 DAC33_ADJSTEP(1));
923
924 /* div=4 / gain=1 / div */
925 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
926
927 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
928 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
929 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
930
931 dac33_oscwait(codec);
932
933 if (dac33->fifo_mode) {
934 /* Generic for all FIFO modes */
935 /* 50-51 : ASRC Control registers */
936 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
937 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
938
939 /* Write registers 0x34 and 0x35 (MSB, LSB) */
940 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
941
942 /* Set interrupts to high active */
943 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
944 } else {
945 /* FIFO bypass mode */
946 /* 50-51 : ASRC Control registers */
947 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
948 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
949 }
950
951 /* Interrupt behaviour configuration */
952 switch (dac33->fifo_mode) {
953 case DAC33_FIFO_MODE1:
954 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
955 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
956 break;
957 case DAC33_FIFO_MODE7:
958 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
959 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
960 break;
961 default:
962 /* in FIFO bypass mode, the interrupts are not used */
963 break;
964 }
965
966 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
967
968 switch (dac33->fifo_mode) {
969 case DAC33_FIFO_MODE1:
970 /*
971 * For mode1:
972 * Disable the FIFO bypass (Enable the use of FIFO)
973 * Select nSample mode
974 * BCLK is only running when data is needed by DAC33
975 */
976 fifoctrl_a &= ~DAC33_FBYPAS;
977 fifoctrl_a &= ~DAC33_FAUTO;
978 if (dac33->keep_bclk)
979 aictrl_b |= DAC33_BCLKON;
980 else
981 aictrl_b &= ~DAC33_BCLKON;
982 break;
983 case DAC33_FIFO_MODE7:
984 /*
985 * For mode1:
986 * Disable the FIFO bypass (Enable the use of FIFO)
987 * Select Threshold mode
988 * BCLK is only running when data is needed by DAC33
989 */
990 fifoctrl_a &= ~DAC33_FBYPAS;
991 fifoctrl_a |= DAC33_FAUTO;
992 if (dac33->keep_bclk)
993 aictrl_b |= DAC33_BCLKON;
994 else
995 aictrl_b &= ~DAC33_BCLKON;
996 break;
997 default:
998 /*
999 * For FIFO bypass mode:
1000 * Enable the FIFO bypass (Disable the FIFO use)
1001 * Set the BCLK as continous
1002 */
1003 fifoctrl_a |= DAC33_FBYPAS;
1004 aictrl_b |= DAC33_BCLKON;
1005 break;
1006 }
1007
1008 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1009 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1010 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1011
1012 /*
1013 * BCLK divide ratio
1014 * 0: 1.5
1015 * 1: 1
1016 * 2: 2
1017 * ...
1018 * 254: 254
1019 * 255: 255
1020 */
1021 if (dac33->fifo_mode)
1022 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1023 dac33->burst_bclkdiv);
1024 else
1025 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1026
1027 switch (dac33->fifo_mode) {
1028 case DAC33_FIFO_MODE1:
1029 dac33_write16(codec, DAC33_ATHR_MSB,
1030 DAC33_THRREG(dac33->alarm_threshold));
1031 break;
1032 case DAC33_FIFO_MODE7:
1033 /*
1034 * Configure the threshold levels, and leave 10 sample space
1035 * at the bottom, and also at the top of the FIFO
1036 */
1037 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1038 dac33_write16(codec, DAC33_LTHR_MSB, DAC33_THRREG(MODE7_LTHR));
1039 break;
1040 default:
1041 break;
1042 }
1043
1044 mutex_unlock(&dac33->mutex);
1045
1046 return 0;
1047 }
1048
1049 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1050 {
1051 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1052 struct snd_soc_device *socdev = rtd->socdev;
1053 struct snd_soc_codec *codec = socdev->card->codec;
1054 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1055 unsigned int period_size = substream->runtime->period_size;
1056 unsigned int rate = substream->runtime->rate;
1057 unsigned int nsample_limit;
1058
1059 /* In bypass mode we don't need to calculate */
1060 if (!dac33->fifo_mode)
1061 return;
1062
1063 switch (dac33->fifo_mode) {
1064 case DAC33_FIFO_MODE1:
1065 /* Number of samples under i2c latency */
1066 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1067 dac33->mode1_latency);
1068 if (dac33->auto_fifo_config) {
1069 if (period_size <= dac33->alarm_threshold)
1070 /*
1071 * Configure nSamaple to number of periods,
1072 * which covers the latency requironment.
1073 */
1074 dac33->nsample = period_size *
1075 ((dac33->alarm_threshold / period_size) +
1076 (dac33->alarm_threshold % period_size ?
1077 1 : 0));
1078 else
1079 dac33->nsample = period_size;
1080 } else {
1081 /* nSample time shall not be shorter than i2c latency */
1082 dac33->nsample_min = dac33->alarm_threshold;
1083 /*
1084 * nSample should not be bigger than alsa buffer minus
1085 * size of one period to avoid overruns
1086 */
1087 dac33->nsample_max = substream->runtime->buffer_size -
1088 period_size;
1089 nsample_limit = DAC33_BUFFER_SIZE_SAMPLES -
1090 dac33->alarm_threshold;
1091 if (dac33->nsample_max > nsample_limit)
1092 dac33->nsample_max = nsample_limit;
1093
1094 /* Correct the nSample if it is outside of the ranges */
1095 if (dac33->nsample < dac33->nsample_min)
1096 dac33->nsample = dac33->nsample_min;
1097 if (dac33->nsample > dac33->nsample_max)
1098 dac33->nsample = dac33->nsample_max;
1099 }
1100
1101 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1102 dac33->nsample);
1103 dac33->t_stamp1 = 0;
1104 dac33->t_stamp2 = 0;
1105 break;
1106 case DAC33_FIFO_MODE7:
1107 if (dac33->auto_fifo_config) {
1108 dac33->uthr = UTHR_FROM_PERIOD_SIZE(
1109 period_size,
1110 rate,
1111 dac33->burst_rate) + 9;
1112 if (dac33->uthr > MODE7_UTHR)
1113 dac33->uthr = MODE7_UTHR;
1114 if (dac33->uthr < (MODE7_LTHR + 10))
1115 dac33->uthr = (MODE7_LTHR + 10);
1116 }
1117 dac33->mode7_us_to_lthr =
1118 SAMPLES_TO_US(substream->runtime->rate,
1119 dac33->uthr - MODE7_LTHR + 1);
1120 dac33->t_stamp1 = 0;
1121 break;
1122 default:
1123 break;
1124 }
1125
1126 }
1127
1128 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1129 struct snd_soc_dai *dai)
1130 {
1131 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1132 struct snd_soc_device *socdev = rtd->socdev;
1133 struct snd_soc_codec *codec = socdev->card->codec;
1134 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1135 int ret = 0;
1136
1137 switch (cmd) {
1138 case SNDRV_PCM_TRIGGER_START:
1139 case SNDRV_PCM_TRIGGER_RESUME:
1140 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1141 if (dac33->fifo_mode) {
1142 dac33->state = DAC33_PREFILL;
1143 queue_work(dac33->dac33_wq, &dac33->work);
1144 }
1145 break;
1146 case SNDRV_PCM_TRIGGER_STOP:
1147 case SNDRV_PCM_TRIGGER_SUSPEND:
1148 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1149 if (dac33->fifo_mode) {
1150 dac33->state = DAC33_FLUSH;
1151 queue_work(dac33->dac33_wq, &dac33->work);
1152 }
1153 break;
1154 default:
1155 ret = -EINVAL;
1156 }
1157
1158 return ret;
1159 }
1160
1161 static snd_pcm_sframes_t dac33_dai_delay(
1162 struct snd_pcm_substream *substream,
1163 struct snd_soc_dai *dai)
1164 {
1165 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1166 struct snd_soc_device *socdev = rtd->socdev;
1167 struct snd_soc_codec *codec = socdev->card->codec;
1168 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1169 unsigned long long t0, t1, t_now;
1170 unsigned int time_delta, uthr;
1171 int samples_out, samples_in, samples;
1172 snd_pcm_sframes_t delay = 0;
1173
1174 switch (dac33->fifo_mode) {
1175 case DAC33_FIFO_BYPASS:
1176 break;
1177 case DAC33_FIFO_MODE1:
1178 spin_lock(&dac33->lock);
1179 t0 = dac33->t_stamp1;
1180 t1 = dac33->t_stamp2;
1181 spin_unlock(&dac33->lock);
1182 t_now = ktime_to_us(ktime_get());
1183
1184 /* We have not started to fill the FIFO yet, delay is 0 */
1185 if (!t1)
1186 goto out;
1187
1188 if (t0 > t1) {
1189 /*
1190 * Phase 1:
1191 * After Alarm threshold, and before nSample write
1192 */
1193 time_delta = t_now - t0;
1194 samples_out = time_delta ? US_TO_SAMPLES(
1195 substream->runtime->rate,
1196 time_delta) : 0;
1197
1198 if (likely(dac33->alarm_threshold > samples_out))
1199 delay = dac33->alarm_threshold - samples_out;
1200 else
1201 delay = 0;
1202 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1203 /*
1204 * Phase 2:
1205 * After nSample write (during burst operation)
1206 */
1207 time_delta = t_now - t0;
1208 samples_out = time_delta ? US_TO_SAMPLES(
1209 substream->runtime->rate,
1210 time_delta) : 0;
1211
1212 time_delta = t_now - t1;
1213 samples_in = time_delta ? US_TO_SAMPLES(
1214 dac33->burst_rate,
1215 time_delta) : 0;
1216
1217 samples = dac33->alarm_threshold;
1218 samples += (samples_in - samples_out);
1219
1220 if (likely(samples > 0))
1221 delay = samples;
1222 else
1223 delay = 0;
1224 } else {
1225 /*
1226 * Phase 3:
1227 * After burst operation, before next alarm threshold
1228 */
1229 time_delta = t_now - t0;
1230 samples_out = time_delta ? US_TO_SAMPLES(
1231 substream->runtime->rate,
1232 time_delta) : 0;
1233
1234 samples_in = dac33->nsample;
1235 samples = dac33->alarm_threshold;
1236 samples += (samples_in - samples_out);
1237
1238 if (likely(samples > 0))
1239 delay = samples > DAC33_BUFFER_SIZE_SAMPLES ?
1240 DAC33_BUFFER_SIZE_SAMPLES : samples;
1241 else
1242 delay = 0;
1243 }
1244 break;
1245 case DAC33_FIFO_MODE7:
1246 spin_lock(&dac33->lock);
1247 t0 = dac33->t_stamp1;
1248 uthr = dac33->uthr;
1249 spin_unlock(&dac33->lock);
1250 t_now = ktime_to_us(ktime_get());
1251
1252 /* We have not started to fill the FIFO yet, delay is 0 */
1253 if (!t0)
1254 goto out;
1255
1256 if (t_now <= t0) {
1257 /*
1258 * Either the timestamps are messed or equal. Report
1259 * maximum delay
1260 */
1261 delay = uthr;
1262 goto out;
1263 }
1264
1265 time_delta = t_now - t0;
1266 if (time_delta <= dac33->mode7_us_to_lthr) {
1267 /*
1268 * Phase 1:
1269 * After burst (draining phase)
1270 */
1271 samples_out = US_TO_SAMPLES(
1272 substream->runtime->rate,
1273 time_delta);
1274
1275 if (likely(uthr > samples_out))
1276 delay = uthr - samples_out;
1277 else
1278 delay = 0;
1279 } else {
1280 /*
1281 * Phase 2:
1282 * During burst operation
1283 */
1284 time_delta = time_delta - dac33->mode7_us_to_lthr;
1285
1286 samples_out = US_TO_SAMPLES(
1287 substream->runtime->rate,
1288 time_delta);
1289 samples_in = US_TO_SAMPLES(
1290 dac33->burst_rate,
1291 time_delta);
1292 delay = MODE7_LTHR + samples_in - samples_out;
1293
1294 if (unlikely(delay > uthr))
1295 delay = uthr;
1296 }
1297 break;
1298 default:
1299 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1300 dac33->fifo_mode);
1301 break;
1302 }
1303 out:
1304 return delay;
1305 }
1306
1307 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1308 int clk_id, unsigned int freq, int dir)
1309 {
1310 struct snd_soc_codec *codec = codec_dai->codec;
1311 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1312 u8 ioc_reg, asrcb_reg;
1313
1314 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1315 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1316 switch (clk_id) {
1317 case TLV320DAC33_MCLK:
1318 ioc_reg |= DAC33_REFSEL;
1319 asrcb_reg |= DAC33_SRCREFSEL;
1320 break;
1321 case TLV320DAC33_SLEEPCLK:
1322 ioc_reg &= ~DAC33_REFSEL;
1323 asrcb_reg &= ~DAC33_SRCREFSEL;
1324 break;
1325 default:
1326 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1327 break;
1328 }
1329 dac33->refclk = freq;
1330
1331 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1332 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1333
1334 return 0;
1335 }
1336
1337 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1338 unsigned int fmt)
1339 {
1340 struct snd_soc_codec *codec = codec_dai->codec;
1341 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1342 u8 aictrl_a, aictrl_b;
1343
1344 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1345 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1346 /* set master/slave audio interface */
1347 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1348 case SND_SOC_DAIFMT_CBM_CFM:
1349 /* Codec Master */
1350 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1351 break;
1352 case SND_SOC_DAIFMT_CBS_CFS:
1353 /* Codec Slave */
1354 if (dac33->fifo_mode) {
1355 dev_err(codec->dev, "FIFO mode requires master mode\n");
1356 return -EINVAL;
1357 } else
1358 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1359 break;
1360 default:
1361 return -EINVAL;
1362 }
1363
1364 aictrl_a &= ~DAC33_AFMT_MASK;
1365 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1366 case SND_SOC_DAIFMT_I2S:
1367 aictrl_a |= DAC33_AFMT_I2S;
1368 break;
1369 case SND_SOC_DAIFMT_DSP_A:
1370 aictrl_a |= DAC33_AFMT_DSP;
1371 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1372 aictrl_b |= DAC33_DATA_DELAY(0);
1373 break;
1374 case SND_SOC_DAIFMT_RIGHT_J:
1375 aictrl_a |= DAC33_AFMT_RIGHT_J;
1376 break;
1377 case SND_SOC_DAIFMT_LEFT_J:
1378 aictrl_a |= DAC33_AFMT_LEFT_J;
1379 break;
1380 default:
1381 dev_err(codec->dev, "Unsupported format (%u)\n",
1382 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1383 return -EINVAL;
1384 }
1385
1386 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1387 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1388
1389 return 0;
1390 }
1391
1392 static int dac33_soc_probe(struct platform_device *pdev)
1393 {
1394 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1395 struct snd_soc_codec *codec;
1396 struct tlv320dac33_priv *dac33;
1397 int ret = 0;
1398
1399 BUG_ON(!tlv320dac33_codec);
1400
1401 codec = tlv320dac33_codec;
1402 socdev->card->codec = codec;
1403 dac33 = snd_soc_codec_get_drvdata(codec);
1404
1405 /* register pcms */
1406 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
1407 if (ret < 0) {
1408 dev_err(codec->dev, "failed to create pcms\n");
1409 goto pcm_err;
1410 }
1411
1412 snd_soc_add_controls(codec, dac33_snd_controls,
1413 ARRAY_SIZE(dac33_snd_controls));
1414 /* Only add the FIFO controls, if we have valid IRQ number */
1415 if (dac33->irq >= 0) {
1416 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1417 ARRAY_SIZE(dac33_mode_snd_controls));
1418 /* FIFO usage controls only, if autoio config is not selected */
1419 if (!dac33->auto_fifo_config)
1420 snd_soc_add_controls(codec, dac33_fifo_snd_controls,
1421 ARRAY_SIZE(dac33_fifo_snd_controls));
1422 }
1423
1424 dac33_add_widgets(codec);
1425
1426 return 0;
1427
1428 pcm_err:
1429 dac33_hard_power(codec, 0);
1430 return ret;
1431 }
1432
1433 static int dac33_soc_remove(struct platform_device *pdev)
1434 {
1435 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1436 struct snd_soc_codec *codec = socdev->card->codec;
1437
1438 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1439
1440 snd_soc_free_pcms(socdev);
1441 snd_soc_dapm_free(socdev);
1442
1443 return 0;
1444 }
1445
1446 static int dac33_soc_suspend(struct platform_device *pdev, pm_message_t state)
1447 {
1448 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1449 struct snd_soc_codec *codec = socdev->card->codec;
1450
1451 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1452
1453 return 0;
1454 }
1455
1456 static int dac33_soc_resume(struct platform_device *pdev)
1457 {
1458 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1459 struct snd_soc_codec *codec = socdev->card->codec;
1460
1461 dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1462
1463 return 0;
1464 }
1465
1466 struct snd_soc_codec_device soc_codec_dev_tlv320dac33 = {
1467 .probe = dac33_soc_probe,
1468 .remove = dac33_soc_remove,
1469 .suspend = dac33_soc_suspend,
1470 .resume = dac33_soc_resume,
1471 };
1472 EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33);
1473
1474 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1475 SNDRV_PCM_RATE_48000)
1476 #define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE
1477
1478 static struct snd_soc_dai_ops dac33_dai_ops = {
1479 .startup = dac33_startup,
1480 .shutdown = dac33_shutdown,
1481 .hw_params = dac33_hw_params,
1482 .trigger = dac33_pcm_trigger,
1483 .delay = dac33_dai_delay,
1484 .set_sysclk = dac33_set_dai_sysclk,
1485 .set_fmt = dac33_set_dai_fmt,
1486 };
1487
1488 struct snd_soc_dai dac33_dai = {
1489 .name = "tlv320dac33",
1490 .playback = {
1491 .stream_name = "Playback",
1492 .channels_min = 2,
1493 .channels_max = 2,
1494 .rates = DAC33_RATES,
1495 .formats = DAC33_FORMATS,},
1496 .ops = &dac33_dai_ops,
1497 };
1498 EXPORT_SYMBOL_GPL(dac33_dai);
1499
1500 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1501 const struct i2c_device_id *id)
1502 {
1503 struct tlv320dac33_platform_data *pdata;
1504 struct tlv320dac33_priv *dac33;
1505 struct snd_soc_codec *codec;
1506 int ret, i;
1507
1508 if (client->dev.platform_data == NULL) {
1509 dev_err(&client->dev, "Platform data not set\n");
1510 return -ENODEV;
1511 }
1512 pdata = client->dev.platform_data;
1513
1514 dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1515 if (dac33 == NULL)
1516 return -ENOMEM;
1517
1518 codec = &dac33->codec;
1519 snd_soc_codec_set_drvdata(codec, dac33);
1520 codec->control_data = client;
1521
1522 mutex_init(&codec->mutex);
1523 mutex_init(&dac33->mutex);
1524 spin_lock_init(&dac33->lock);
1525 INIT_LIST_HEAD(&codec->dapm_widgets);
1526 INIT_LIST_HEAD(&codec->dapm_paths);
1527
1528 codec->name = "tlv320dac33";
1529 codec->owner = THIS_MODULE;
1530 codec->read = dac33_read_reg_cache;
1531 codec->write = dac33_write_locked;
1532 codec->hw_write = (hw_write_t) i2c_master_send;
1533 codec->bias_level = SND_SOC_BIAS_OFF;
1534 codec->set_bias_level = dac33_set_bias_level;
1535 codec->idle_bias_off = 1;
1536 codec->dai = &dac33_dai;
1537 codec->num_dai = 1;
1538 codec->reg_cache_size = ARRAY_SIZE(dac33_reg);
1539 codec->reg_cache = kmemdup(dac33_reg, ARRAY_SIZE(dac33_reg),
1540 GFP_KERNEL);
1541 if (codec->reg_cache == NULL) {
1542 ret = -ENOMEM;
1543 goto error_reg;
1544 }
1545
1546 i2c_set_clientdata(client, dac33);
1547
1548 dac33->power_gpio = pdata->power_gpio;
1549 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1550 /* Pre calculate the burst rate */
1551 dac33->burst_rate = BURST_BASEFREQ_HZ / dac33->burst_bclkdiv / 32;
1552 dac33->keep_bclk = pdata->keep_bclk;
1553 dac33->auto_fifo_config = pdata->auto_fifo_config;
1554 dac33->mode1_latency = pdata->mode1_latency;
1555 if (!dac33->mode1_latency)
1556 dac33->mode1_latency = 10000; /* 10ms */
1557 dac33->irq = client->irq;
1558 dac33->nsample = NSAMPLE_MAX;
1559 dac33->nsample_max = NSAMPLE_MAX;
1560 dac33->uthr = MODE7_UTHR;
1561 /* Disable FIFO use by default */
1562 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1563
1564 tlv320dac33_codec = codec;
1565
1566 codec->dev = &client->dev;
1567 dac33_dai.dev = codec->dev;
1568
1569 /* Check if the reset GPIO number is valid and request it */
1570 if (dac33->power_gpio >= 0) {
1571 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1572 if (ret < 0) {
1573 dev_err(codec->dev,
1574 "Failed to request reset GPIO (%d)\n",
1575 dac33->power_gpio);
1576 snd_soc_unregister_dai(&dac33_dai);
1577 snd_soc_unregister_codec(codec);
1578 goto error_gpio;
1579 }
1580 gpio_direction_output(dac33->power_gpio, 0);
1581 }
1582
1583 /* Check if the IRQ number is valid and request it */
1584 if (dac33->irq >= 0) {
1585 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1586 IRQF_TRIGGER_RISING | IRQF_DISABLED,
1587 codec->name, codec);
1588 if (ret < 0) {
1589 dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1590 dac33->irq, ret);
1591 dac33->irq = -1;
1592 }
1593 if (dac33->irq != -1) {
1594 /* Setup work queue */
1595 dac33->dac33_wq =
1596 create_singlethread_workqueue("tlv320dac33");
1597 if (dac33->dac33_wq == NULL) {
1598 free_irq(dac33->irq, &dac33->codec);
1599 ret = -ENOMEM;
1600 goto error_wq;
1601 }
1602
1603 INIT_WORK(&dac33->work, dac33_work);
1604 }
1605 }
1606
1607 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1608 dac33->supplies[i].supply = dac33_supply_names[i];
1609
1610 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(dac33->supplies),
1611 dac33->supplies);
1612
1613 if (ret != 0) {
1614 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
1615 goto err_get;
1616 }
1617
1618 /* Read the tlv320dac33 ID registers */
1619 ret = dac33_hard_power(codec, 1);
1620 if (ret != 0) {
1621 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1622 goto error_codec;
1623 }
1624 dac33_read_id(codec);
1625 dac33_hard_power(codec, 0);
1626
1627 ret = snd_soc_register_codec(codec);
1628 if (ret != 0) {
1629 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
1630 goto error_codec;
1631 }
1632
1633 ret = snd_soc_register_dai(&dac33_dai);
1634 if (ret != 0) {
1635 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
1636 snd_soc_unregister_codec(codec);
1637 goto error_codec;
1638 }
1639
1640 return ret;
1641
1642 error_codec:
1643 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1644 err_get:
1645 if (dac33->irq >= 0) {
1646 free_irq(dac33->irq, &dac33->codec);
1647 destroy_workqueue(dac33->dac33_wq);
1648 }
1649 error_wq:
1650 if (dac33->power_gpio >= 0)
1651 gpio_free(dac33->power_gpio);
1652 error_gpio:
1653 kfree(codec->reg_cache);
1654 error_reg:
1655 tlv320dac33_codec = NULL;
1656 kfree(dac33);
1657
1658 return ret;
1659 }
1660
1661 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1662 {
1663 struct tlv320dac33_priv *dac33;
1664
1665 dac33 = i2c_get_clientdata(client);
1666
1667 if (unlikely(dac33->chip_power))
1668 dac33_hard_power(&dac33->codec, 0);
1669
1670 if (dac33->power_gpio >= 0)
1671 gpio_free(dac33->power_gpio);
1672 if (dac33->irq >= 0)
1673 free_irq(dac33->irq, &dac33->codec);
1674
1675 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1676
1677 destroy_workqueue(dac33->dac33_wq);
1678 snd_soc_unregister_dai(&dac33_dai);
1679 snd_soc_unregister_codec(&dac33->codec);
1680 kfree(dac33->codec.reg_cache);
1681 kfree(dac33);
1682 tlv320dac33_codec = NULL;
1683
1684 return 0;
1685 }
1686
1687 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1688 {
1689 .name = "tlv320dac33",
1690 .driver_data = 0,
1691 },
1692 { },
1693 };
1694
1695 static struct i2c_driver tlv320dac33_i2c_driver = {
1696 .driver = {
1697 .name = "tlv320dac33",
1698 .owner = THIS_MODULE,
1699 },
1700 .probe = dac33_i2c_probe,
1701 .remove = __devexit_p(dac33_i2c_remove),
1702 .id_table = tlv320dac33_i2c_id,
1703 };
1704
1705 static int __init dac33_module_init(void)
1706 {
1707 int r;
1708 r = i2c_add_driver(&tlv320dac33_i2c_driver);
1709 if (r < 0) {
1710 printk(KERN_ERR "DAC33: driver registration failed\n");
1711 return r;
1712 }
1713 return 0;
1714 }
1715 module_init(dac33_module_init);
1716
1717 static void __exit dac33_module_exit(void)
1718 {
1719 i2c_del_driver(&tlv320dac33_i2c_driver);
1720 }
1721 module_exit(dac33_module_exit);
1722
1723
1724 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1725 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1726 MODULE_LICENSE("GPL");
Tomato firmware and modifications.