?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 4.15.6
[linux/fpc-iii.git] / sound / soc / codecs / tlv320dac33.c
blob5b94a151539ce1f828e4af7feb643be9d62eb7fd
1 /*
2 * ALSA SoC Texas Instruments TLV320DAC33 codec driver
3 *
4 * Author: Peter Ujfalusi <peter.ujfalusi@ti.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/interrupt.h>
31 #include <linux/gpio.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/initval.h>
39 #include <sound/tlv.h>
40
41 #include <sound/tlv320dac33-plat.h>
42 #include "tlv320dac33.h"
43
44 /*
45 * The internal FIFO is 24576 bytes long
46 * It can be configured to hold 16bit or 24bit samples
47 * In 16bit configuration the FIFO can hold 6144 stereo samples
48 * In 24bit configuration the FIFO can hold 4096 stereo samples
49 */
50 #define DAC33_FIFO_SIZE_16BIT 6144
51 #define DAC33_FIFO_SIZE_24BIT 4096
52 #define DAC33_MODE7_MARGIN 10 /* Safety margin for FIFO in Mode7 */
53
54 #define BURST_BASEFREQ_HZ 49152000
55
56 #define SAMPLES_TO_US(rate, samples) \
57 (1000000000 / (((rate) * 1000) / (samples)))
58
59 #define US_TO_SAMPLES(rate, us) \
60 ((rate) / (1000000 / ((us) < 1000000 ? (us) : 1000000)))
61
62 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
63 (((samples)*5000) / (((burstrate)*5000) / ((burstrate) - (playrate))))
64
65 static void dac33_calculate_times(struct snd_pcm_substream *substream,
66 struct snd_soc_codec *codec);
67 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
68 struct snd_soc_codec *codec);
69
70 enum dac33_state {
71 DAC33_IDLE = 0,
72 DAC33_PREFILL,
73 DAC33_PLAYBACK,
74 DAC33_FLUSH,
75 };
76
77 enum dac33_fifo_modes {
78 DAC33_FIFO_BYPASS = 0,
79 DAC33_FIFO_MODE1,
80 DAC33_FIFO_MODE7,
81 DAC33_FIFO_LAST_MODE,
82 };
83
84 #define DAC33_NUM_SUPPLIES 3
85 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
86 "AVDD",
87 "DVDD",
88 "IOVDD",
89 };
90
91 struct tlv320dac33_priv {
92 struct mutex mutex;
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 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
104 unsigned int fifo_size; /* Size of the FIFO in samples */
105 unsigned int nsample; /* burst read amount from host */
106 int mode1_latency; /* latency caused by the i2c writes in
107 * us */
108 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
109 unsigned int burst_rate; /* Interface speed in Burst modes */
110
111 int keep_bclk; /* Keep the BCLK continuously running
112 * in FIFO modes */
113 spinlock_t lock;
114 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */
115 unsigned long long t_stamp2; /* calculate the FIFO caused delay */
116
117 unsigned int mode1_us_burst; /* Time to burst read n number of
118 * samples */
119 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */
120
121 unsigned int uthr;
122
123 enum dac33_state state;
124 void *control_data;
125 };
126
127 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
128 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
129 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
130 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
131 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
132 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
133 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
134 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
135 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
136 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
137 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
138 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
139 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
140 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
141 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
142 0x00, 0x00, /* 0x38 - 0x39 */
143 /* Registers 0x3a - 0x3f are reserved */
144 0x00, 0x00, /* 0x3a - 0x3b */
145 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
146
147 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
148 0x00, 0x80, /* 0x44 - 0x45 */
149 /* Registers 0x46 - 0x47 are reserved */
150 0x80, 0x80, /* 0x46 - 0x47 */
151
152 0x80, 0x00, 0x00, /* 0x48 - 0x4a */
153 /* Registers 0x4b - 0x7c are reserved */
154 0x00, /* 0x4b */
155 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
156 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
157 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
158 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
159 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
160 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
161 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
162 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
163 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
164 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
165 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
166 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
167 0x00, /* 0x7c */
168
169 0xda, 0x33, 0x03, /* 0x7d - 0x7f */
170 };
171
172 /* Register read and write */
173 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
174 unsigned reg)
175 {
176 u8 *cache = codec->reg_cache;
177 if (reg >= DAC33_CACHEREGNUM)
178 return 0;
179
180 return cache[reg];
181 }
182
183 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
184 u8 reg, u8 value)
185 {
186 u8 *cache = codec->reg_cache;
187 if (reg >= DAC33_CACHEREGNUM)
188 return;
189
190 cache[reg] = value;
191 }
192
193 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
194 u8 *value)
195 {
196 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
197 int val, ret = 0;
198
199 *value = reg & 0xff;
200
201 /* If powered off, return the cached value */
202 if (dac33->chip_power) {
203 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
204 if (val < 0) {
205 dev_err(codec->dev, "Read failed (%d)\n", val);
206 value[0] = dac33_read_reg_cache(codec, reg);
207 ret = val;
208 } else {
209 value[0] = val;
210 dac33_write_reg_cache(codec, reg, val);
211 }
212 } else {
213 value[0] = dac33_read_reg_cache(codec, reg);
214 }
215
216 return ret;
217 }
218
219 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
220 unsigned int value)
221 {
222 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
223 u8 data[2];
224 int ret = 0;
225
226 /*
227 * data is
228 * D15..D8 dac33 register offset
229 * D7...D0 register data
230 */
231 data[0] = reg & 0xff;
232 data[1] = value & 0xff;
233
234 dac33_write_reg_cache(codec, data[0], data[1]);
235 if (dac33->chip_power) {
236 ret = codec->hw_write(codec->control_data, data, 2);
237 if (ret != 2)
238 dev_err(codec->dev, "Write failed (%d)\n", ret);
239 else
240 ret = 0;
241 }
242
243 return ret;
244 }
245
246 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
247 unsigned int value)
248 {
249 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
250 int ret;
251
252 mutex_lock(&dac33->mutex);
253 ret = dac33_write(codec, reg, value);
254 mutex_unlock(&dac33->mutex);
255
256 return ret;
257 }
258
259 #define DAC33_I2C_ADDR_AUTOINC 0x80
260 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
261 unsigned int value)
262 {
263 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
264 u8 data[3];
265 int ret = 0;
266
267 /*
268 * data is
269 * D23..D16 dac33 register offset
270 * D15..D8 register data MSB
271 * D7...D0 register data LSB
272 */
273 data[0] = reg & 0xff;
274 data[1] = (value >> 8) & 0xff;
275 data[2] = value & 0xff;
276
277 dac33_write_reg_cache(codec, data[0], data[1]);
278 dac33_write_reg_cache(codec, data[0] + 1, data[2]);
279
280 if (dac33->chip_power) {
281 /* We need to set autoincrement mode for 16 bit writes */
282 data[0] |= DAC33_I2C_ADDR_AUTOINC;
283 ret = codec->hw_write(codec->control_data, data, 3);
284 if (ret != 3)
285 dev_err(codec->dev, "Write failed (%d)\n", ret);
286 else
287 ret = 0;
288 }
289
290 return ret;
291 }
292
293 static void dac33_init_chip(struct snd_soc_codec *codec)
294 {
295 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
296
297 if (unlikely(!dac33->chip_power))
298 return;
299
300 /* A : DAC sample rate Fsref/1.5 */
301 dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
302 /* B : DAC src=normal, not muted */
303 dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
304 DAC33_DACSRCL_LEFT);
305 /* C : (defaults) */
306 dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
307
308 /* 73 : volume soft stepping control,
309 clock source = internal osc (?) */
310 dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
311
312 /* Restore only selected registers (gains mostly) */
313 dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
314 dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
315 dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
316 dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
317
318 dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
319 dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
320 dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
321 dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
322
323 dac33_write(codec, DAC33_OUT_AMP_CTRL,
324 dac33_read_reg_cache(codec, DAC33_OUT_AMP_CTRL));
325
326 dac33_write(codec, DAC33_LDAC_PWR_CTRL,
327 dac33_read_reg_cache(codec, DAC33_LDAC_PWR_CTRL));
328 dac33_write(codec, DAC33_RDAC_PWR_CTRL,
329 dac33_read_reg_cache(codec, DAC33_RDAC_PWR_CTRL));
330 }
331
332 static inline int dac33_read_id(struct snd_soc_codec *codec)
333 {
334 int i, ret = 0;
335 u8 reg;
336
337 for (i = 0; i < 3; i++) {
338 ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, &reg);
339 if (ret < 0)
340 break;
341 }
342
343 return ret;
344 }
345
346 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
347 {
348 u8 reg;
349
350 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
351 if (power)
352 reg |= DAC33_PDNALLB;
353 else
354 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
355 DAC33_DACRPDNB | DAC33_DACLPDNB);
356 dac33_write(codec, DAC33_PWR_CTRL, reg);
357 }
358
359 static inline void dac33_disable_digital(struct snd_soc_codec *codec)
360 {
361 u8 reg;
362
363 /* Stop the DAI clock */
364 reg = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
365 reg &= ~DAC33_BCLKON;
366 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg);
367
368 /* Power down the Oscillator, and DACs */
369 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
370 reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
371 dac33_write(codec, DAC33_PWR_CTRL, reg);
372 }
373
374 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
375 {
376 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
377 int ret = 0;
378
379 mutex_lock(&dac33->mutex);
380
381 /* Safety check */
382 if (unlikely(power == dac33->chip_power)) {
383 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
384 power ? "ON" : "OFF");
385 goto exit;
386 }
387
388 if (power) {
389 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
390 dac33->supplies);
391 if (ret != 0) {
392 dev_err(codec->dev,
393 "Failed to enable supplies: %d\n", ret);
394 goto exit;
395 }
396
397 if (dac33->power_gpio >= 0)
398 gpio_set_value(dac33->power_gpio, 1);
399
400 dac33->chip_power = 1;
401 } else {
402 dac33_soft_power(codec, 0);
403 if (dac33->power_gpio >= 0)
404 gpio_set_value(dac33->power_gpio, 0);
405
406 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
407 dac33->supplies);
408 if (ret != 0) {
409 dev_err(codec->dev,
410 "Failed to disable supplies: %d\n", ret);
411 goto exit;
412 }
413
414 dac33->chip_power = 0;
415 }
416
417 exit:
418 mutex_unlock(&dac33->mutex);
419 return ret;
420 }
421
422 static int dac33_playback_event(struct snd_soc_dapm_widget *w,
423 struct snd_kcontrol *kcontrol, int event)
424 {
425 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
426 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
427
428 switch (event) {
429 case SND_SOC_DAPM_PRE_PMU:
430 if (likely(dac33->substream)) {
431 dac33_calculate_times(dac33->substream, codec);
432 dac33_prepare_chip(dac33->substream, codec);
433 }
434 break;
435 case SND_SOC_DAPM_POST_PMD:
436 dac33_disable_digital(codec);
437 break;
438 }
439 return 0;
440 }
441
442 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
443 struct snd_ctl_elem_value *ucontrol)
444 {
445 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
446 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
447
448 ucontrol->value.enumerated.item[0] = dac33->fifo_mode;
449
450 return 0;
451 }
452
453 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
454 struct snd_ctl_elem_value *ucontrol)
455 {
456 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
457 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
458 int ret = 0;
459
460 if (dac33->fifo_mode == ucontrol->value.enumerated.item[0])
461 return 0;
462 /* Do not allow changes while stream is running*/
463 if (snd_soc_codec_is_active(codec))
464 return -EPERM;
465
466 if (ucontrol->value.enumerated.item[0] >= DAC33_FIFO_LAST_MODE)
467 ret = -EINVAL;
468 else
469 dac33->fifo_mode = ucontrol->value.enumerated.item[0];
470
471 return ret;
472 }
473
474 /* Codec operation modes */
475 static const char *dac33_fifo_mode_texts[] = {
476 "Bypass", "Mode 1", "Mode 7"
477 };
478
479 static SOC_ENUM_SINGLE_EXT_DECL(dac33_fifo_mode_enum, dac33_fifo_mode_texts);
480
481 /* L/R Line Output Gain */
482 static const char *lr_lineout_gain_texts[] = {
483 "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
484 "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
485 };
486
487 static SOC_ENUM_SINGLE_DECL(l_lineout_gain_enum,
488 DAC33_LDAC_PWR_CTRL, 0,
489 lr_lineout_gain_texts);
490
491 static SOC_ENUM_SINGLE_DECL(r_lineout_gain_enum,
492 DAC33_RDAC_PWR_CTRL, 0,
493 lr_lineout_gain_texts);
494
495 /*
496 * DACL/R digital volume control:
497 * from 0 dB to -63.5 in 0.5 dB steps
498 * Need to be inverted later on:
499 * 0x00 == 0 dB
500 * 0x7f == -63.5 dB
501 */
502 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
503
504 static const struct snd_kcontrol_new dac33_snd_controls[] = {
505 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
506 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
507 0, 0x7f, 1, dac_digivol_tlv),
508 SOC_DOUBLE_R("DAC Digital Playback Switch",
509 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
510 SOC_DOUBLE_R("Line to Line Out Volume",
511 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
512 SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
513 SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
514 };
515
516 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
517 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
518 dac33_get_fifo_mode, dac33_set_fifo_mode),
519 };
520
521 /* Analog bypass */
522 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
523 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
524
525 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
526 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
527
528 /* LOP L/R invert selection */
529 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
530
531 static SOC_ENUM_SINGLE_DECL(dac33_left_lom_enum,
532 DAC33_OUT_AMP_CTRL, 3,
533 dac33_lr_lom_texts);
534
535 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
536 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
537
538 static SOC_ENUM_SINGLE_DECL(dac33_right_lom_enum,
539 DAC33_OUT_AMP_CTRL, 2,
540 dac33_lr_lom_texts);
541
542 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
543 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
544
545 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
546 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
547 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
548
549 SND_SOC_DAPM_INPUT("LINEL"),
550 SND_SOC_DAPM_INPUT("LINER"),
551
552 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
553 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
554
555 /* Analog bypass */
556 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
557 &dac33_dapm_abypassl_control),
558 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
559 &dac33_dapm_abypassr_control),
560
561 SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
562 &dac33_dapm_left_lom_control),
563 SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
564 &dac33_dapm_right_lom_control),
565 /*
566 * For DAPM path, when only the anlog bypass path is enabled, and the
567 * LOP inverted from the corresponding DAC side.
568 * This is needed, so we can attach the DAC power supply in this case.
569 */
570 SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
571 SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
572
573 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
574 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
575 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
576 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
577
578 SND_SOC_DAPM_SUPPLY("Left DAC Power",
579 DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
580 SND_SOC_DAPM_SUPPLY("Right DAC Power",
581 DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
582
583 SND_SOC_DAPM_SUPPLY("Codec Power",
584 DAC33_PWR_CTRL, 4, 0, NULL, 0),
585
586 SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
587 SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
588 };
589
590 static const struct snd_soc_dapm_route audio_map[] = {
591 /* Analog bypass */
592 {"Analog Left Bypass", "Switch", "LINEL"},
593 {"Analog Right Bypass", "Switch", "LINER"},
594
595 {"Output Left Amplifier", NULL, "DACL"},
596 {"Output Right Amplifier", NULL, "DACR"},
597
598 {"Left Bypass PGA", NULL, "Analog Left Bypass"},
599 {"Right Bypass PGA", NULL, "Analog Right Bypass"},
600
601 {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
602 {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
603 {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
604 {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
605
606 {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
607 {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
608
609 {"DACL", NULL, "Left DAC Power"},
610 {"DACR", NULL, "Right DAC Power"},
611
612 {"Left Bypass PGA", NULL, "Left DAC Power"},
613 {"Right Bypass PGA", NULL, "Right DAC Power"},
614
615 /* output */
616 {"LEFT_LO", NULL, "Output Left Amplifier"},
617 {"RIGHT_LO", NULL, "Output Right Amplifier"},
618
619 {"LEFT_LO", NULL, "Codec Power"},
620 {"RIGHT_LO", NULL, "Codec Power"},
621 };
622
623 static int dac33_set_bias_level(struct snd_soc_codec *codec,
624 enum snd_soc_bias_level level)
625 {
626 int ret;
627
628 switch (level) {
629 case SND_SOC_BIAS_ON:
630 break;
631 case SND_SOC_BIAS_PREPARE:
632 break;
633 case SND_SOC_BIAS_STANDBY:
634 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
635 /* Coming from OFF, switch on the codec */
636 ret = dac33_hard_power(codec, 1);
637 if (ret != 0)
638 return ret;
639
640 dac33_init_chip(codec);
641 }
642 break;
643 case SND_SOC_BIAS_OFF:
644 /* Do not power off, when the codec is already off */
645 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF)
646 return 0;
647 ret = dac33_hard_power(codec, 0);
648 if (ret != 0)
649 return ret;
650 break;
651 }
652
653 return 0;
654 }
655
656 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
657 {
658 struct snd_soc_codec *codec = dac33->codec;
659 unsigned int delay;
660 unsigned long flags;
661
662 switch (dac33->fifo_mode) {
663 case DAC33_FIFO_MODE1:
664 dac33_write16(codec, DAC33_NSAMPLE_MSB,
665 DAC33_THRREG(dac33->nsample));
666
667 /* Take the timestamps */
668 spin_lock_irqsave(&dac33->lock, flags);
669 dac33->t_stamp2 = ktime_to_us(ktime_get());
670 dac33->t_stamp1 = dac33->t_stamp2;
671 spin_unlock_irqrestore(&dac33->lock, flags);
672
673 dac33_write16(codec, DAC33_PREFILL_MSB,
674 DAC33_THRREG(dac33->alarm_threshold));
675 /* Enable Alarm Threshold IRQ with a delay */
676 delay = SAMPLES_TO_US(dac33->burst_rate,
677 dac33->alarm_threshold) + 1000;
678 usleep_range(delay, delay + 500);
679 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
680 break;
681 case DAC33_FIFO_MODE7:
682 /* Take the timestamp */
683 spin_lock_irqsave(&dac33->lock, flags);
684 dac33->t_stamp1 = ktime_to_us(ktime_get());
685 /* Move back the timestamp with drain time */
686 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
687 spin_unlock_irqrestore(&dac33->lock, flags);
688
689 dac33_write16(codec, DAC33_PREFILL_MSB,
690 DAC33_THRREG(DAC33_MODE7_MARGIN));
691
692 /* Enable Upper Threshold IRQ */
693 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
694 break;
695 default:
696 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
697 dac33->fifo_mode);
698 break;
699 }
700 }
701
702 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
703 {
704 struct snd_soc_codec *codec = dac33->codec;
705 unsigned long flags;
706
707 switch (dac33->fifo_mode) {
708 case DAC33_FIFO_MODE1:
709 /* Take the timestamp */
710 spin_lock_irqsave(&dac33->lock, flags);
711 dac33->t_stamp2 = ktime_to_us(ktime_get());
712 spin_unlock_irqrestore(&dac33->lock, flags);
713
714 dac33_write16(codec, DAC33_NSAMPLE_MSB,
715 DAC33_THRREG(dac33->nsample));
716 break;
717 case DAC33_FIFO_MODE7:
718 /* At the moment we are not using interrupts in mode7 */
719 break;
720 default:
721 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
722 dac33->fifo_mode);
723 break;
724 }
725 }
726
727 static void dac33_work(struct work_struct *work)
728 {
729 struct snd_soc_codec *codec;
730 struct tlv320dac33_priv *dac33;
731 u8 reg;
732
733 dac33 = container_of(work, struct tlv320dac33_priv, work);
734 codec = dac33->codec;
735
736 mutex_lock(&dac33->mutex);
737 switch (dac33->state) {
738 case DAC33_PREFILL:
739 dac33->state = DAC33_PLAYBACK;
740 dac33_prefill_handler(dac33);
741 break;
742 case DAC33_PLAYBACK:
743 dac33_playback_handler(dac33);
744 break;
745 case DAC33_IDLE:
746 break;
747 case DAC33_FLUSH:
748 dac33->state = DAC33_IDLE;
749 /* Mask all interrupts from dac33 */
750 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
751
752 /* flush fifo */
753 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
754 reg |= DAC33_FIFOFLUSH;
755 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
756 break;
757 }
758 mutex_unlock(&dac33->mutex);
759 }
760
761 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
762 {
763 struct snd_soc_codec *codec = dev;
764 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
765 unsigned long flags;
766
767 spin_lock_irqsave(&dac33->lock, flags);
768 dac33->t_stamp1 = ktime_to_us(ktime_get());
769 spin_unlock_irqrestore(&dac33->lock, flags);
770
771 /* Do not schedule the workqueue in Mode7 */
772 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
773 schedule_work(&dac33->work);
774
775 return IRQ_HANDLED;
776 }
777
778 static void dac33_oscwait(struct snd_soc_codec *codec)
779 {
780 int timeout = 60;
781 u8 reg;
782
783 do {
784 usleep_range(1000, 2000);
785 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
786 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
787 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
788 dev_err(codec->dev,
789 "internal oscillator calibration failed\n");
790 }
791
792 static int dac33_startup(struct snd_pcm_substream *substream,
793 struct snd_soc_dai *dai)
794 {
795 struct snd_soc_codec *codec = dai->codec;
796 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
797
798 /* Stream started, save the substream pointer */
799 dac33->substream = substream;
800
801 return 0;
802 }
803
804 static void dac33_shutdown(struct snd_pcm_substream *substream,
805 struct snd_soc_dai *dai)
806 {
807 struct snd_soc_codec *codec = dai->codec;
808 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
809
810 dac33->substream = NULL;
811 }
812
813 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
814 (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
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_codec *codec = dai->codec;
820 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
821
822 /* Check parameters for validity */
823 switch (params_rate(params)) {
824 case 44100:
825 case 48000:
826 break;
827 default:
828 dev_err(codec->dev, "unsupported rate %d\n",
829 params_rate(params));
830 return -EINVAL;
831 }
832
833 switch (params_width(params)) {
834 case 16:
835 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
836 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
837 break;
838 case 32:
839 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
840 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
841 break;
842 default:
843 dev_err(codec->dev, "unsupported width %d\n",
844 params_width(params));
845 return -EINVAL;
846 }
847
848 return 0;
849 }
850
851 #define CALC_OSCSET(rate, refclk) ( \
852 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
853 #define CALC_RATIOSET(rate, refclk) ( \
854 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
855
856 /*
857 * tlv320dac33 is strict on the sequence of the register writes, if the register
858 * writes happens in different order, than dac33 might end up in unknown state.
859 * Use the known, working sequence of register writes to initialize the dac33.
860 */
861 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
862 struct snd_soc_codec *codec)
863 {
864 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
865 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
866 u8 aictrl_a, aictrl_b, fifoctrl_a;
867
868 switch (substream->runtime->rate) {
869 case 44100:
870 case 48000:
871 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
872 ratioset = CALC_RATIOSET(substream->runtime->rate,
873 dac33->refclk);
874 break;
875 default:
876 dev_err(codec->dev, "unsupported rate %d\n",
877 substream->runtime->rate);
878 return -EINVAL;
879 }
880
881
882 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
883 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
884 /* Read FIFO control A, and clear FIFO flush bit */
885 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
886 fifoctrl_a &= ~DAC33_FIFOFLUSH;
887
888 fifoctrl_a &= ~DAC33_WIDTH;
889 switch (substream->runtime->format) {
890 case SNDRV_PCM_FORMAT_S16_LE:
891 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
892 fifoctrl_a |= DAC33_WIDTH;
893 break;
894 case SNDRV_PCM_FORMAT_S32_LE:
895 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
896 break;
897 default:
898 dev_err(codec->dev, "unsupported format %d\n",
899 substream->runtime->format);
900 return -EINVAL;
901 }
902
903 mutex_lock(&dac33->mutex);
904
905 if (!dac33->chip_power) {
906 /*
907 * Chip is not powered yet.
908 * Do the init in the dac33_set_bias_level later.
909 */
910 mutex_unlock(&dac33->mutex);
911 return 0;
912 }
913
914 dac33_soft_power(codec, 0);
915 dac33_soft_power(codec, 1);
916
917 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
918 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
919
920 /* Write registers 0x08 and 0x09 (MSB, LSB) */
921 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
922
923 /* OSC calibration time */
924 dac33_write(codec, DAC33_CALIB_TIME, 96);
925
926 /* adjustment treshold & step */
927 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
928 DAC33_ADJSTEP(1));
929
930 /* div=4 / gain=1 / div */
931 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
932
933 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
934 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
935 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
936
937 dac33_oscwait(codec);
938
939 if (dac33->fifo_mode) {
940 /* Generic for all FIFO modes */
941 /* 50-51 : ASRC Control registers */
942 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
943 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
944
945 /* Write registers 0x34 and 0x35 (MSB, LSB) */
946 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
947
948 /* Set interrupts to high active */
949 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
950 } else {
951 /* FIFO bypass mode */
952 /* 50-51 : ASRC Control registers */
953 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
954 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
955 }
956
957 /* Interrupt behaviour configuration */
958 switch (dac33->fifo_mode) {
959 case DAC33_FIFO_MODE1:
960 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
961 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
962 break;
963 case DAC33_FIFO_MODE7:
964 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
965 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
966 break;
967 default:
968 /* in FIFO bypass mode, the interrupts are not used */
969 break;
970 }
971
972 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
973
974 switch (dac33->fifo_mode) {
975 case DAC33_FIFO_MODE1:
976 /*
977 * For mode1:
978 * Disable the FIFO bypass (Enable the use of FIFO)
979 * Select nSample 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 case DAC33_FIFO_MODE7:
990 /*
991 * For mode1:
992 * Disable the FIFO bypass (Enable the use of FIFO)
993 * Select Threshold mode
994 * BCLK is only running when data is needed by DAC33
995 */
996 fifoctrl_a &= ~DAC33_FBYPAS;
997 fifoctrl_a |= DAC33_FAUTO;
998 if (dac33->keep_bclk)
999 aictrl_b |= DAC33_BCLKON;
1000 else
1001 aictrl_b &= ~DAC33_BCLKON;
1002 break;
1003 default:
1004 /*
1005 * For FIFO bypass mode:
1006 * Enable the FIFO bypass (Disable the FIFO use)
1007 * Set the BCLK as continuous
1008 */
1009 fifoctrl_a |= DAC33_FBYPAS;
1010 aictrl_b |= DAC33_BCLKON;
1011 break;
1012 }
1013
1014 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1015 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1016 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1017
1018 /*
1019 * BCLK divide ratio
1020 * 0: 1.5
1021 * 1: 1
1022 * 2: 2
1023 * ...
1024 * 254: 254
1025 * 255: 255
1026 */
1027 if (dac33->fifo_mode)
1028 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1029 dac33->burst_bclkdiv);
1030 else
1031 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1032 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1033 else
1034 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
1035
1036 switch (dac33->fifo_mode) {
1037 case DAC33_FIFO_MODE1:
1038 dac33_write16(codec, DAC33_ATHR_MSB,
1039 DAC33_THRREG(dac33->alarm_threshold));
1040 break;
1041 case DAC33_FIFO_MODE7:
1042 /*
1043 * Configure the threshold levels, and leave 10 sample space
1044 * at the bottom, and also at the top of the FIFO
1045 */
1046 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1047 dac33_write16(codec, DAC33_LTHR_MSB,
1048 DAC33_THRREG(DAC33_MODE7_MARGIN));
1049 break;
1050 default:
1051 break;
1052 }
1053
1054 mutex_unlock(&dac33->mutex);
1055
1056 return 0;
1057 }
1058
1059 static void dac33_calculate_times(struct snd_pcm_substream *substream,
1060 struct snd_soc_codec *codec)
1061 {
1062 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1063 unsigned int period_size = substream->runtime->period_size;
1064 unsigned int rate = substream->runtime->rate;
1065 unsigned int nsample_limit;
1066
1067 /* In bypass mode we don't need to calculate */
1068 if (!dac33->fifo_mode)
1069 return;
1070
1071 switch (dac33->fifo_mode) {
1072 case DAC33_FIFO_MODE1:
1073 /* Number of samples under i2c latency */
1074 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1075 dac33->mode1_latency);
1076 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1077
1078 if (period_size <= dac33->alarm_threshold)
1079 /*
1080 * Configure nSamaple to number of periods,
1081 * which covers the latency requironment.
1082 */
1083 dac33->nsample = period_size *
1084 ((dac33->alarm_threshold / period_size) +
1085 (dac33->alarm_threshold % period_size ?
1086 1 : 0));
1087 else if (period_size > nsample_limit)
1088 dac33->nsample = nsample_limit;
1089 else
1090 dac33->nsample = period_size;
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 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1099 dac33->burst_rate) + 9;
1100 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1101 dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1102 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1103 dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1104
1105 dac33->mode7_us_to_lthr =
1106 SAMPLES_TO_US(substream->runtime->rate,
1107 dac33->uthr - DAC33_MODE7_MARGIN + 1);
1108 dac33->t_stamp1 = 0;
1109 break;
1110 default:
1111 break;
1112 }
1113
1114 }
1115
1116 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1117 struct snd_soc_dai *dai)
1118 {
1119 struct snd_soc_codec *codec = dai->codec;
1120 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1121 int ret = 0;
1122
1123 switch (cmd) {
1124 case SNDRV_PCM_TRIGGER_START:
1125 case SNDRV_PCM_TRIGGER_RESUME:
1126 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1127 if (dac33->fifo_mode) {
1128 dac33->state = DAC33_PREFILL;
1129 schedule_work(&dac33->work);
1130 }
1131 break;
1132 case SNDRV_PCM_TRIGGER_STOP:
1133 case SNDRV_PCM_TRIGGER_SUSPEND:
1134 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1135 if (dac33->fifo_mode) {
1136 dac33->state = DAC33_FLUSH;
1137 schedule_work(&dac33->work);
1138 }
1139 break;
1140 default:
1141 ret = -EINVAL;
1142 }
1143
1144 return ret;
1145 }
1146
1147 static snd_pcm_sframes_t dac33_dai_delay(
1148 struct snd_pcm_substream *substream,
1149 struct snd_soc_dai *dai)
1150 {
1151 struct snd_soc_codec *codec = dai->codec;
1152 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1153 unsigned long long t0, t1, t_now;
1154 unsigned int time_delta, uthr;
1155 int samples_out, samples_in, samples;
1156 snd_pcm_sframes_t delay = 0;
1157 unsigned long flags;
1158
1159 switch (dac33->fifo_mode) {
1160 case DAC33_FIFO_BYPASS:
1161 break;
1162 case DAC33_FIFO_MODE1:
1163 spin_lock_irqsave(&dac33->lock, flags);
1164 t0 = dac33->t_stamp1;
1165 t1 = dac33->t_stamp2;
1166 spin_unlock_irqrestore(&dac33->lock, flags);
1167 t_now = ktime_to_us(ktime_get());
1168
1169 /* We have not started to fill the FIFO yet, delay is 0 */
1170 if (!t1)
1171 goto out;
1172
1173 if (t0 > t1) {
1174 /*
1175 * Phase 1:
1176 * After Alarm threshold, and before nSample write
1177 */
1178 time_delta = t_now - t0;
1179 samples_out = time_delta ? US_TO_SAMPLES(
1180 substream->runtime->rate,
1181 time_delta) : 0;
1182
1183 if (likely(dac33->alarm_threshold > samples_out))
1184 delay = dac33->alarm_threshold - samples_out;
1185 else
1186 delay = 0;
1187 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1188 /*
1189 * Phase 2:
1190 * After nSample write (during burst operation)
1191 */
1192 time_delta = t_now - t0;
1193 samples_out = time_delta ? US_TO_SAMPLES(
1194 substream->runtime->rate,
1195 time_delta) : 0;
1196
1197 time_delta = t_now - t1;
1198 samples_in = time_delta ? US_TO_SAMPLES(
1199 dac33->burst_rate,
1200 time_delta) : 0;
1201
1202 samples = dac33->alarm_threshold;
1203 samples += (samples_in - samples_out);
1204
1205 if (likely(samples > 0))
1206 delay = samples;
1207 else
1208 delay = 0;
1209 } else {
1210 /*
1211 * Phase 3:
1212 * After burst operation, before next alarm threshold
1213 */
1214 time_delta = t_now - t0;
1215 samples_out = time_delta ? US_TO_SAMPLES(
1216 substream->runtime->rate,
1217 time_delta) : 0;
1218
1219 samples_in = dac33->nsample;
1220 samples = dac33->alarm_threshold;
1221 samples += (samples_in - samples_out);
1222
1223 if (likely(samples > 0))
1224 delay = samples > dac33->fifo_size ?
1225 dac33->fifo_size : samples;
1226 else
1227 delay = 0;
1228 }
1229 break;
1230 case DAC33_FIFO_MODE7:
1231 spin_lock_irqsave(&dac33->lock, flags);
1232 t0 = dac33->t_stamp1;
1233 uthr = dac33->uthr;
1234 spin_unlock_irqrestore(&dac33->lock, flags);
1235 t_now = ktime_to_us(ktime_get());
1236
1237 /* We have not started to fill the FIFO yet, delay is 0 */
1238 if (!t0)
1239 goto out;
1240
1241 if (t_now <= t0) {
1242 /*
1243 * Either the timestamps are messed or equal. Report
1244 * maximum delay
1245 */
1246 delay = uthr;
1247 goto out;
1248 }
1249
1250 time_delta = t_now - t0;
1251 if (time_delta <= dac33->mode7_us_to_lthr) {
1252 /*
1253 * Phase 1:
1254 * After burst (draining phase)
1255 */
1256 samples_out = US_TO_SAMPLES(
1257 substream->runtime->rate,
1258 time_delta);
1259
1260 if (likely(uthr > samples_out))
1261 delay = uthr - samples_out;
1262 else
1263 delay = 0;
1264 } else {
1265 /*
1266 * Phase 2:
1267 * During burst operation
1268 */
1269 time_delta = time_delta - dac33->mode7_us_to_lthr;
1270
1271 samples_out = US_TO_SAMPLES(
1272 substream->runtime->rate,
1273 time_delta);
1274 samples_in = US_TO_SAMPLES(
1275 dac33->burst_rate,
1276 time_delta);
1277 delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1278
1279 if (unlikely(delay > uthr))
1280 delay = uthr;
1281 }
1282 break;
1283 default:
1284 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1285 dac33->fifo_mode);
1286 break;
1287 }
1288 out:
1289 return delay;
1290 }
1291
1292 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1293 int clk_id, unsigned int freq, int dir)
1294 {
1295 struct snd_soc_codec *codec = codec_dai->codec;
1296 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1297 u8 ioc_reg, asrcb_reg;
1298
1299 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1300 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1301 switch (clk_id) {
1302 case TLV320DAC33_MCLK:
1303 ioc_reg |= DAC33_REFSEL;
1304 asrcb_reg |= DAC33_SRCREFSEL;
1305 break;
1306 case TLV320DAC33_SLEEPCLK:
1307 ioc_reg &= ~DAC33_REFSEL;
1308 asrcb_reg &= ~DAC33_SRCREFSEL;
1309 break;
1310 default:
1311 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1312 break;
1313 }
1314 dac33->refclk = freq;
1315
1316 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1317 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1318
1319 return 0;
1320 }
1321
1322 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1323 unsigned int fmt)
1324 {
1325 struct snd_soc_codec *codec = codec_dai->codec;
1326 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1327 u8 aictrl_a, aictrl_b;
1328
1329 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1330 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1331 /* set master/slave audio interface */
1332 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1333 case SND_SOC_DAIFMT_CBM_CFM:
1334 /* Codec Master */
1335 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1336 break;
1337 case SND_SOC_DAIFMT_CBS_CFS:
1338 /* Codec Slave */
1339 if (dac33->fifo_mode) {
1340 dev_err(codec->dev, "FIFO mode requires master mode\n");
1341 return -EINVAL;
1342 } else
1343 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1344 break;
1345 default:
1346 return -EINVAL;
1347 }
1348
1349 aictrl_a &= ~DAC33_AFMT_MASK;
1350 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1351 case SND_SOC_DAIFMT_I2S:
1352 aictrl_a |= DAC33_AFMT_I2S;
1353 break;
1354 case SND_SOC_DAIFMT_DSP_A:
1355 aictrl_a |= DAC33_AFMT_DSP;
1356 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1357 aictrl_b |= DAC33_DATA_DELAY(0);
1358 break;
1359 case SND_SOC_DAIFMT_RIGHT_J:
1360 aictrl_a |= DAC33_AFMT_RIGHT_J;
1361 break;
1362 case SND_SOC_DAIFMT_LEFT_J:
1363 aictrl_a |= DAC33_AFMT_LEFT_J;
1364 break;
1365 default:
1366 dev_err(codec->dev, "Unsupported format (%u)\n",
1367 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1368 return -EINVAL;
1369 }
1370
1371 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1372 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1373
1374 return 0;
1375 }
1376
1377 static int dac33_soc_probe(struct snd_soc_codec *codec)
1378 {
1379 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1380 int ret = 0;
1381
1382 codec->control_data = dac33->control_data;
1383 codec->hw_write = (hw_write_t) i2c_master_send;
1384 dac33->codec = codec;
1385
1386 /* Read the tlv320dac33 ID registers */
1387 ret = dac33_hard_power(codec, 1);
1388 if (ret != 0) {
1389 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1390 goto err_power;
1391 }
1392 ret = dac33_read_id(codec);
1393 dac33_hard_power(codec, 0);
1394
1395 if (ret < 0) {
1396 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1397 ret = -ENODEV;
1398 goto err_power;
1399 }
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,
1405 codec->component.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 INIT_WORK(&dac33->work, dac33_work);
1413 }
1414 }
1415
1416 /* Only add the FIFO controls, if we have valid IRQ number */
1417 if (dac33->irq >= 0)
1418 snd_soc_add_codec_controls(codec, dac33_mode_snd_controls,
1419 ARRAY_SIZE(dac33_mode_snd_controls));
1420
1421 err_power:
1422 return ret;
1423 }
1424
1425 static int dac33_soc_remove(struct snd_soc_codec *codec)
1426 {
1427 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1428
1429 if (dac33->irq >= 0) {
1430 free_irq(dac33->irq, dac33->codec);
1431 flush_work(&dac33->work);
1432 }
1433 return 0;
1434 }
1435
1436 static const struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1437 .read = dac33_read_reg_cache,
1438 .write = dac33_write_locked,
1439 .set_bias_level = dac33_set_bias_level,
1440 .idle_bias_off = true,
1441 .reg_cache_size = ARRAY_SIZE(dac33_reg),
1442 .reg_word_size = sizeof(u8),
1443 .reg_cache_default = dac33_reg,
1444 .probe = dac33_soc_probe,
1445 .remove = dac33_soc_remove,
1446
1447 .component_driver = {
1448 .controls = dac33_snd_controls,
1449 .num_controls = ARRAY_SIZE(dac33_snd_controls),
1450 .dapm_widgets = dac33_dapm_widgets,
1451 .num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets),
1452 .dapm_routes = audio_map,
1453 .num_dapm_routes = ARRAY_SIZE(audio_map),
1454 },
1455 };
1456
1457 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1458 SNDRV_PCM_RATE_48000)
1459 #define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1460
1461 static const struct snd_soc_dai_ops dac33_dai_ops = {
1462 .startup = dac33_startup,
1463 .shutdown = dac33_shutdown,
1464 .hw_params = dac33_hw_params,
1465 .trigger = dac33_pcm_trigger,
1466 .delay = dac33_dai_delay,
1467 .set_sysclk = dac33_set_dai_sysclk,
1468 .set_fmt = dac33_set_dai_fmt,
1469 };
1470
1471 static struct snd_soc_dai_driver dac33_dai = {
1472 .name = "tlv320dac33-hifi",
1473 .playback = {
1474 .stream_name = "Playback",
1475 .channels_min = 2,
1476 .channels_max = 2,
1477 .rates = DAC33_RATES,
1478 .formats = DAC33_FORMATS,
1479 .sig_bits = 24,
1480 },
1481 .ops = &dac33_dai_ops,
1482 };
1483
1484 static int dac33_i2c_probe(struct i2c_client *client,
1485 const struct i2c_device_id *id)
1486 {
1487 struct tlv320dac33_platform_data *pdata;
1488 struct tlv320dac33_priv *dac33;
1489 int ret, i;
1490
1491 if (client->dev.platform_data == NULL) {
1492 dev_err(&client->dev, "Platform data not set\n");
1493 return -ENODEV;
1494 }
1495 pdata = client->dev.platform_data;
1496
1497 dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
1498 GFP_KERNEL);
1499 if (dac33 == NULL)
1500 return -ENOMEM;
1501
1502 dac33->control_data = client;
1503 mutex_init(&dac33->mutex);
1504 spin_lock_init(&dac33->lock);
1505
1506 i2c_set_clientdata(client, dac33);
1507
1508 dac33->power_gpio = pdata->power_gpio;
1509 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1510 dac33->keep_bclk = pdata->keep_bclk;
1511 dac33->mode1_latency = pdata->mode1_latency;
1512 if (!dac33->mode1_latency)
1513 dac33->mode1_latency = 10000; /* 10ms */
1514 dac33->irq = client->irq;
1515 /* Disable FIFO use by default */
1516 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1517
1518 /* Check if the reset GPIO number is valid and request it */
1519 if (dac33->power_gpio >= 0) {
1520 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1521 if (ret < 0) {
1522 dev_err(&client->dev,
1523 "Failed to request reset GPIO (%d)\n",
1524 dac33->power_gpio);
1525 goto err_gpio;
1526 }
1527 gpio_direction_output(dac33->power_gpio, 0);
1528 }
1529
1530 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1531 dac33->supplies[i].supply = dac33_supply_names[i];
1532
1533 ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1534 dac33->supplies);
1535
1536 if (ret != 0) {
1537 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1538 goto err_get;
1539 }
1540
1541 ret = snd_soc_register_codec(&client->dev,
1542 &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1543 if (ret < 0)
1544 goto err_get;
1545
1546 return ret;
1547 err_get:
1548 if (dac33->power_gpio >= 0)
1549 gpio_free(dac33->power_gpio);
1550 err_gpio:
1551 return ret;
1552 }
1553
1554 static int dac33_i2c_remove(struct i2c_client *client)
1555 {
1556 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1557
1558 if (unlikely(dac33->chip_power))
1559 dac33_hard_power(dac33->codec, 0);
1560
1561 if (dac33->power_gpio >= 0)
1562 gpio_free(dac33->power_gpio);
1563
1564 snd_soc_unregister_codec(&client->dev);
1565 return 0;
1566 }
1567
1568 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1569 {
1570 .name = "tlv320dac33",
1571 .driver_data = 0,
1572 },
1573 { },
1574 };
1575 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1576
1577 static struct i2c_driver tlv320dac33_i2c_driver = {
1578 .driver = {
1579 .name = "tlv320dac33-codec",
1580 },
1581 .probe = dac33_i2c_probe,
1582 .remove = dac33_i2c_remove,
1583 .id_table = tlv320dac33_i2c_id,
1584 };
1585
1586 module_i2c_driver(tlv320dac33_i2c_driver);
1587
1588 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1589 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1590 MODULE_LICENSE("GPL");
Linux with added FPC-III support