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Merge remote-tracking branch 'xen-tip/linux-next'
[deliverable/linux.git] / sound / soc / codecs / tlv320dac33.c
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 workqueue_struct *dac33_wq;
94 struct work_struct work;
95 struct snd_soc_codec *codec;
96 struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
97 struct snd_pcm_substream *substream;
98 int power_gpio;
99 int chip_power;
100 int irq;
101 unsigned int refclk;
102
103 unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
104 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
105 unsigned int fifo_size; /* Size of the FIFO in samples */
106 unsigned int nsample; /* burst read amount from host */
107 int mode1_latency; /* latency caused by the i2c writes in
108 * us */
109 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
110 unsigned int burst_rate; /* Interface speed in Burst modes */
111
112 int keep_bclk; /* Keep the BCLK continuously running
113 * in FIFO modes */
114 spinlock_t lock;
115 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */
116 unsigned long long t_stamp2; /* calculate the FIFO caused delay */
117
118 unsigned int mode1_us_burst; /* Time to burst read n number of
119 * samples */
120 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */
121
122 unsigned int uthr;
123
124 enum dac33_state state;
125 void *control_data;
126 };
127
128 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
129 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
130 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
131 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
132 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
133 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
134 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
135 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
136 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
137 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
138 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
139 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
140 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
141 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
142 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
143 0x00, 0x00, /* 0x38 - 0x39 */
144 /* Registers 0x3a - 0x3f are reserved */
145 0x00, 0x00, /* 0x3a - 0x3b */
146 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
147
148 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
149 0x00, 0x80, /* 0x44 - 0x45 */
150 /* Registers 0x46 - 0x47 are reserved */
151 0x80, 0x80, /* 0x46 - 0x47 */
152
153 0x80, 0x00, 0x00, /* 0x48 - 0x4a */
154 /* Registers 0x4b - 0x7c are reserved */
155 0x00, /* 0x4b */
156 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
157 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
158 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
159 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
160 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
161 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
162 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
163 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
164 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
165 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
166 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
167 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
168 0x00, /* 0x7c */
169
170 0xda, 0x33, 0x03, /* 0x7d - 0x7f */
171 };
172
173 /* Register read and write */
174 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
175 unsigned reg)
176 {
177 u8 *cache = codec->reg_cache;
178 if (reg >= DAC33_CACHEREGNUM)
179 return 0;
180
181 return cache[reg];
182 }
183
184 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
185 u8 reg, u8 value)
186 {
187 u8 *cache = codec->reg_cache;
188 if (reg >= DAC33_CACHEREGNUM)
189 return;
190
191 cache[reg] = value;
192 }
193
194 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
195 u8 *value)
196 {
197 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
198 int val, ret = 0;
199
200 *value = reg & 0xff;
201
202 /* If powered off, return the cached value */
203 if (dac33->chip_power) {
204 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
205 if (val < 0) {
206 dev_err(codec->dev, "Read failed (%d)\n", val);
207 value[0] = dac33_read_reg_cache(codec, reg);
208 ret = val;
209 } else {
210 value[0] = val;
211 dac33_write_reg_cache(codec, reg, val);
212 }
213 } else {
214 value[0] = dac33_read_reg_cache(codec, reg);
215 }
216
217 return ret;
218 }
219
220 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
221 unsigned int value)
222 {
223 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
224 u8 data[2];
225 int ret = 0;
226
227 /*
228 * data is
229 * D15..D8 dac33 register offset
230 * D7...D0 register data
231 */
232 data[0] = reg & 0xff;
233 data[1] = value & 0xff;
234
235 dac33_write_reg_cache(codec, data[0], data[1]);
236 if (dac33->chip_power) {
237 ret = codec->hw_write(codec->control_data, data, 2);
238 if (ret != 2)
239 dev_err(codec->dev, "Write failed (%d)\n", ret);
240 else
241 ret = 0;
242 }
243
244 return ret;
245 }
246
247 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
248 unsigned int value)
249 {
250 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
251 int ret;
252
253 mutex_lock(&dac33->mutex);
254 ret = dac33_write(codec, reg, value);
255 mutex_unlock(&dac33->mutex);
256
257 return ret;
258 }
259
260 #define DAC33_I2C_ADDR_AUTOINC 0x80
261 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
262 unsigned int value)
263 {
264 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
265 u8 data[3];
266 int ret = 0;
267
268 /*
269 * data is
270 * D23..D16 dac33 register offset
271 * D15..D8 register data MSB
272 * D7...D0 register data LSB
273 */
274 data[0] = reg & 0xff;
275 data[1] = (value >> 8) & 0xff;
276 data[2] = value & 0xff;
277
278 dac33_write_reg_cache(codec, data[0], data[1]);
279 dac33_write_reg_cache(codec, data[0] + 1, data[2]);
280
281 if (dac33->chip_power) {
282 /* We need to set autoincrement mode for 16 bit writes */
283 data[0] |= DAC33_I2C_ADDR_AUTOINC;
284 ret = codec->hw_write(codec->control_data, data, 3);
285 if (ret != 3)
286 dev_err(codec->dev, "Write failed (%d)\n", ret);
287 else
288 ret = 0;
289 }
290
291 return ret;
292 }
293
294 static void dac33_init_chip(struct snd_soc_codec *codec)
295 {
296 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
297
298 if (unlikely(!dac33->chip_power))
299 return;
300
301 /* A : DAC sample rate Fsref/1.5 */
302 dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
303 /* B : DAC src=normal, not muted */
304 dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
305 DAC33_DACSRCL_LEFT);
306 /* C : (defaults) */
307 dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
308
309 /* 73 : volume soft stepping control,
310 clock source = internal osc (?) */
311 dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
312
313 /* Restore only selected registers (gains mostly) */
314 dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
315 dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
316 dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
317 dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
318
319 dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
320 dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
321 dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
322 dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
323
324 dac33_write(codec, DAC33_OUT_AMP_CTRL,
325 dac33_read_reg_cache(codec, DAC33_OUT_AMP_CTRL));
326
327 dac33_write(codec, DAC33_LDAC_PWR_CTRL,
328 dac33_read_reg_cache(codec, DAC33_LDAC_PWR_CTRL));
329 dac33_write(codec, DAC33_RDAC_PWR_CTRL,
330 dac33_read_reg_cache(codec, DAC33_RDAC_PWR_CTRL));
331 }
332
333 static inline int dac33_read_id(struct snd_soc_codec *codec)
334 {
335 int i, ret = 0;
336 u8 reg;
337
338 for (i = 0; i < 3; i++) {
339 ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, &reg);
340 if (ret < 0)
341 break;
342 }
343
344 return ret;
345 }
346
347 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
348 {
349 u8 reg;
350
351 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
352 if (power)
353 reg |= DAC33_PDNALLB;
354 else
355 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
356 DAC33_DACRPDNB | DAC33_DACLPDNB);
357 dac33_write(codec, DAC33_PWR_CTRL, reg);
358 }
359
360 static inline void dac33_disable_digital(struct snd_soc_codec *codec)
361 {
362 u8 reg;
363
364 /* Stop the DAI clock */
365 reg = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
366 reg &= ~DAC33_BCLKON;
367 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg);
368
369 /* Power down the Oscillator, and DACs */
370 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
371 reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
372 dac33_write(codec, DAC33_PWR_CTRL, reg);
373 }
374
375 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
376 {
377 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
378 int ret = 0;
379
380 mutex_lock(&dac33->mutex);
381
382 /* Safety check */
383 if (unlikely(power == dac33->chip_power)) {
384 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
385 power ? "ON" : "OFF");
386 goto exit;
387 }
388
389 if (power) {
390 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
391 dac33->supplies);
392 if (ret != 0) {
393 dev_err(codec->dev,
394 "Failed to enable supplies: %d\n", ret);
395 goto exit;
396 }
397
398 if (dac33->power_gpio >= 0)
399 gpio_set_value(dac33->power_gpio, 1);
400
401 dac33->chip_power = 1;
402 } else {
403 dac33_soft_power(codec, 0);
404 if (dac33->power_gpio >= 0)
405 gpio_set_value(dac33->power_gpio, 0);
406
407 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
408 dac33->supplies);
409 if (ret != 0) {
410 dev_err(codec->dev,
411 "Failed to disable supplies: %d\n", ret);
412 goto exit;
413 }
414
415 dac33->chip_power = 0;
416 }
417
418 exit:
419 mutex_unlock(&dac33->mutex);
420 return ret;
421 }
422
423 static int dac33_playback_event(struct snd_soc_dapm_widget *w,
424 struct snd_kcontrol *kcontrol, int event)
425 {
426 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
427 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
428
429 switch (event) {
430 case SND_SOC_DAPM_PRE_PMU:
431 if (likely(dac33->substream)) {
432 dac33_calculate_times(dac33->substream, codec);
433 dac33_prepare_chip(dac33->substream, codec);
434 }
435 break;
436 case SND_SOC_DAPM_POST_PMD:
437 dac33_disable_digital(codec);
438 break;
439 }
440 return 0;
441 }
442
443 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
444 struct snd_ctl_elem_value *ucontrol)
445 {
446 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
447 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
448
449 ucontrol->value.enumerated.item[0] = dac33->fifo_mode;
450
451 return 0;
452 }
453
454 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
455 struct snd_ctl_elem_value *ucontrol)
456 {
457 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
458 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
459 int ret = 0;
460
461 if (dac33->fifo_mode == ucontrol->value.enumerated.item[0])
462 return 0;
463 /* Do not allow changes while stream is running*/
464 if (snd_soc_codec_is_active(codec))
465 return -EPERM;
466
467 if (ucontrol->value.enumerated.item[0] >= DAC33_FIFO_LAST_MODE)
468 ret = -EINVAL;
469 else
470 dac33->fifo_mode = ucontrol->value.enumerated.item[0];
471
472 return ret;
473 }
474
475 /* Codec operation modes */
476 static const char *dac33_fifo_mode_texts[] = {
477 "Bypass", "Mode 1", "Mode 7"
478 };
479
480 static SOC_ENUM_SINGLE_EXT_DECL(dac33_fifo_mode_enum, dac33_fifo_mode_texts);
481
482 /* L/R Line Output Gain */
483 static const char *lr_lineout_gain_texts[] = {
484 "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
485 "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
486 };
487
488 static SOC_ENUM_SINGLE_DECL(l_lineout_gain_enum,
489 DAC33_LDAC_PWR_CTRL, 0,
490 lr_lineout_gain_texts);
491
492 static SOC_ENUM_SINGLE_DECL(r_lineout_gain_enum,
493 DAC33_RDAC_PWR_CTRL, 0,
494 lr_lineout_gain_texts);
495
496 /*
497 * DACL/R digital volume control:
498 * from 0 dB to -63.5 in 0.5 dB steps
499 * Need to be inverted later on:
500 * 0x00 == 0 dB
501 * 0x7f == -63.5 dB
502 */
503 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
504
505 static const struct snd_kcontrol_new dac33_snd_controls[] = {
506 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
507 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
508 0, 0x7f, 1, dac_digivol_tlv),
509 SOC_DOUBLE_R("DAC Digital Playback Switch",
510 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
511 SOC_DOUBLE_R("Line to Line Out Volume",
512 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
513 SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
514 SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
515 };
516
517 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
518 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
519 dac33_get_fifo_mode, dac33_set_fifo_mode),
520 };
521
522 /* Analog bypass */
523 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
524 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
525
526 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
527 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
528
529 /* LOP L/R invert selection */
530 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
531
532 static SOC_ENUM_SINGLE_DECL(dac33_left_lom_enum,
533 DAC33_OUT_AMP_CTRL, 3,
534 dac33_lr_lom_texts);
535
536 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
537 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
538
539 static SOC_ENUM_SINGLE_DECL(dac33_right_lom_enum,
540 DAC33_OUT_AMP_CTRL, 2,
541 dac33_lr_lom_texts);
542
543 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
544 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
545
546 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
547 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
548 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
549
550 SND_SOC_DAPM_INPUT("LINEL"),
551 SND_SOC_DAPM_INPUT("LINER"),
552
553 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
554 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
555
556 /* Analog bypass */
557 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
558 &dac33_dapm_abypassl_control),
559 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
560 &dac33_dapm_abypassr_control),
561
562 SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
563 &dac33_dapm_left_lom_control),
564 SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
565 &dac33_dapm_right_lom_control),
566 /*
567 * For DAPM path, when only the anlog bypass path is enabled, and the
568 * LOP inverted from the corresponding DAC side.
569 * This is needed, so we can attach the DAC power supply in this case.
570 */
571 SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
572 SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
573
574 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
575 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
576 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
577 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
578
579 SND_SOC_DAPM_SUPPLY("Left DAC Power",
580 DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
581 SND_SOC_DAPM_SUPPLY("Right DAC Power",
582 DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
583
584 SND_SOC_DAPM_SUPPLY("Codec Power",
585 DAC33_PWR_CTRL, 4, 0, NULL, 0),
586
587 SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
588 SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
589 };
590
591 static const struct snd_soc_dapm_route audio_map[] = {
592 /* Analog bypass */
593 {"Analog Left Bypass", "Switch", "LINEL"},
594 {"Analog Right Bypass", "Switch", "LINER"},
595
596 {"Output Left Amplifier", NULL, "DACL"},
597 {"Output Right Amplifier", NULL, "DACR"},
598
599 {"Left Bypass PGA", NULL, "Analog Left Bypass"},
600 {"Right Bypass PGA", NULL, "Analog Right Bypass"},
601
602 {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
603 {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
604 {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
605 {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
606
607 {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
608 {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
609
610 {"DACL", NULL, "Left DAC Power"},
611 {"DACR", NULL, "Right DAC Power"},
612
613 {"Left Bypass PGA", NULL, "Left DAC Power"},
614 {"Right Bypass PGA", NULL, "Right DAC Power"},
615
616 /* output */
617 {"LEFT_LO", NULL, "Output Left Amplifier"},
618 {"RIGHT_LO", NULL, "Output Right Amplifier"},
619
620 {"LEFT_LO", NULL, "Codec Power"},
621 {"RIGHT_LO", NULL, "Codec Power"},
622 };
623
624 static int dac33_set_bias_level(struct snd_soc_codec *codec,
625 enum snd_soc_bias_level level)
626 {
627 int ret;
628
629 switch (level) {
630 case SND_SOC_BIAS_ON:
631 break;
632 case SND_SOC_BIAS_PREPARE:
633 break;
634 case SND_SOC_BIAS_STANDBY:
635 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
636 /* Coming from OFF, switch on the codec */
637 ret = dac33_hard_power(codec, 1);
638 if (ret != 0)
639 return ret;
640
641 dac33_init_chip(codec);
642 }
643 break;
644 case SND_SOC_BIAS_OFF:
645 /* Do not power off, when the codec is already off */
646 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF)
647 return 0;
648 ret = dac33_hard_power(codec, 0);
649 if (ret != 0)
650 return ret;
651 break;
652 }
653
654 return 0;
655 }
656
657 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
658 {
659 struct snd_soc_codec *codec = dac33->codec;
660 unsigned int delay;
661 unsigned long flags;
662
663 switch (dac33->fifo_mode) {
664 case DAC33_FIFO_MODE1:
665 dac33_write16(codec, DAC33_NSAMPLE_MSB,
666 DAC33_THRREG(dac33->nsample));
667
668 /* Take the timestamps */
669 spin_lock_irqsave(&dac33->lock, flags);
670 dac33->t_stamp2 = ktime_to_us(ktime_get());
671 dac33->t_stamp1 = dac33->t_stamp2;
672 spin_unlock_irqrestore(&dac33->lock, flags);
673
674 dac33_write16(codec, DAC33_PREFILL_MSB,
675 DAC33_THRREG(dac33->alarm_threshold));
676 /* Enable Alarm Threshold IRQ with a delay */
677 delay = SAMPLES_TO_US(dac33->burst_rate,
678 dac33->alarm_threshold) + 1000;
679 usleep_range(delay, delay + 500);
680 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
681 break;
682 case DAC33_FIFO_MODE7:
683 /* Take the timestamp */
684 spin_lock_irqsave(&dac33->lock, flags);
685 dac33->t_stamp1 = ktime_to_us(ktime_get());
686 /* Move back the timestamp with drain time */
687 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
688 spin_unlock_irqrestore(&dac33->lock, flags);
689
690 dac33_write16(codec, DAC33_PREFILL_MSB,
691 DAC33_THRREG(DAC33_MODE7_MARGIN));
692
693 /* Enable Upper Threshold IRQ */
694 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
695 break;
696 default:
697 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
698 dac33->fifo_mode);
699 break;
700 }
701 }
702
703 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
704 {
705 struct snd_soc_codec *codec = dac33->codec;
706 unsigned long flags;
707
708 switch (dac33->fifo_mode) {
709 case DAC33_FIFO_MODE1:
710 /* Take the timestamp */
711 spin_lock_irqsave(&dac33->lock, flags);
712 dac33->t_stamp2 = ktime_to_us(ktime_get());
713 spin_unlock_irqrestore(&dac33->lock, flags);
714
715 dac33_write16(codec, DAC33_NSAMPLE_MSB,
716 DAC33_THRREG(dac33->nsample));
717 break;
718 case DAC33_FIFO_MODE7:
719 /* At the moment we are not using interrupts in mode7 */
720 break;
721 default:
722 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
723 dac33->fifo_mode);
724 break;
725 }
726 }
727
728 static void dac33_work(struct work_struct *work)
729 {
730 struct snd_soc_codec *codec;
731 struct tlv320dac33_priv *dac33;
732 u8 reg;
733
734 dac33 = container_of(work, struct tlv320dac33_priv, work);
735 codec = dac33->codec;
736
737 mutex_lock(&dac33->mutex);
738 switch (dac33->state) {
739 case DAC33_PREFILL:
740 dac33->state = DAC33_PLAYBACK;
741 dac33_prefill_handler(dac33);
742 break;
743 case DAC33_PLAYBACK:
744 dac33_playback_handler(dac33);
745 break;
746 case DAC33_IDLE:
747 break;
748 case DAC33_FLUSH:
749 dac33->state = DAC33_IDLE;
750 /* Mask all interrupts from dac33 */
751 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
752
753 /* flush fifo */
754 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
755 reg |= DAC33_FIFOFLUSH;
756 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
757 break;
758 }
759 mutex_unlock(&dac33->mutex);
760 }
761
762 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
763 {
764 struct snd_soc_codec *codec = dev;
765 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
766 unsigned long flags;
767
768 spin_lock_irqsave(&dac33->lock, flags);
769 dac33->t_stamp1 = ktime_to_us(ktime_get());
770 spin_unlock_irqrestore(&dac33->lock, flags);
771
772 /* Do not schedule the workqueue in Mode7 */
773 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
774 queue_work(dac33->dac33_wq, &dac33->work);
775
776 return IRQ_HANDLED;
777 }
778
779 static void dac33_oscwait(struct snd_soc_codec *codec)
780 {
781 int timeout = 60;
782 u8 reg;
783
784 do {
785 usleep_range(1000, 2000);
786 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
787 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
788 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
789 dev_err(codec->dev,
790 "internal oscillator calibration failed\n");
791 }
792
793 static int dac33_startup(struct snd_pcm_substream *substream,
794 struct snd_soc_dai *dai)
795 {
796 struct snd_soc_codec *codec = dai->codec;
797 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
798
799 /* Stream started, save the substream pointer */
800 dac33->substream = substream;
801
802 return 0;
803 }
804
805 static void dac33_shutdown(struct snd_pcm_substream *substream,
806 struct snd_soc_dai *dai)
807 {
808 struct snd_soc_codec *codec = dai->codec;
809 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
810
811 dac33->substream = NULL;
812 }
813
814 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
815 (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
816 static int dac33_hw_params(struct snd_pcm_substream *substream,
817 struct snd_pcm_hw_params *params,
818 struct snd_soc_dai *dai)
819 {
820 struct snd_soc_codec *codec = dai->codec;
821 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(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_width(params)) {
835 case 16:
836 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
837 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
838 break;
839 case 32:
840 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
841 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
842 break;
843 default:
844 dev_err(codec->dev, "unsupported width %d\n",
845 params_width(params));
846 return -EINVAL;
847 }
848
849 return 0;
850 }
851
852 #define CALC_OSCSET(rate, refclk) ( \
853 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
854 #define CALC_RATIOSET(rate, refclk) ( \
855 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
856
857 /*
858 * tlv320dac33 is strict on the sequence of the register writes, if the register
859 * writes happens in different order, than dac33 might end up in unknown state.
860 * Use the known, working sequence of register writes to initialize the dac33.
861 */
862 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
863 struct snd_soc_codec *codec)
864 {
865 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
866 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
867 u8 aictrl_a, aictrl_b, fifoctrl_a;
868
869 switch (substream->runtime->rate) {
870 case 44100:
871 case 48000:
872 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
873 ratioset = CALC_RATIOSET(substream->runtime->rate,
874 dac33->refclk);
875 break;
876 default:
877 dev_err(codec->dev, "unsupported rate %d\n",
878 substream->runtime->rate);
879 return -EINVAL;
880 }
881
882
883 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
884 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
885 /* Read FIFO control A, and clear FIFO flush bit */
886 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
887 fifoctrl_a &= ~DAC33_FIFOFLUSH;
888
889 fifoctrl_a &= ~DAC33_WIDTH;
890 switch (substream->runtime->format) {
891 case SNDRV_PCM_FORMAT_S16_LE:
892 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
893 fifoctrl_a |= DAC33_WIDTH;
894 break;
895 case SNDRV_PCM_FORMAT_S32_LE:
896 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
897 break;
898 default:
899 dev_err(codec->dev, "unsupported format %d\n",
900 substream->runtime->format);
901 return -EINVAL;
902 }
903
904 mutex_lock(&dac33->mutex);
905
906 if (!dac33->chip_power) {
907 /*
908 * Chip is not powered yet.
909 * Do the init in the dac33_set_bias_level later.
910 */
911 mutex_unlock(&dac33->mutex);
912 return 0;
913 }
914
915 dac33_soft_power(codec, 0);
916 dac33_soft_power(codec, 1);
917
918 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
919 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
920
921 /* Write registers 0x08 and 0x09 (MSB, LSB) */
922 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
923
924 /* OSC calibration time */
925 dac33_write(codec, DAC33_CALIB_TIME, 96);
926
927 /* adjustment treshold & step */
928 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
929 DAC33_ADJSTEP(1));
930
931 /* div=4 / gain=1 / div */
932 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
933
934 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
935 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
936 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
937
938 dac33_oscwait(codec);
939
940 if (dac33->fifo_mode) {
941 /* Generic for all FIFO modes */
942 /* 50-51 : ASRC Control registers */
943 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
944 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
945
946 /* Write registers 0x34 and 0x35 (MSB, LSB) */
947 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
948
949 /* Set interrupts to high active */
950 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
951 } else {
952 /* FIFO bypass mode */
953 /* 50-51 : ASRC Control registers */
954 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
955 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
956 }
957
958 /* Interrupt behaviour configuration */
959 switch (dac33->fifo_mode) {
960 case DAC33_FIFO_MODE1:
961 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
962 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
963 break;
964 case DAC33_FIFO_MODE7:
965 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
966 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
967 break;
968 default:
969 /* in FIFO bypass mode, the interrupts are not used */
970 break;
971 }
972
973 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
974
975 switch (dac33->fifo_mode) {
976 case DAC33_FIFO_MODE1:
977 /*
978 * For mode1:
979 * Disable the FIFO bypass (Enable the use of FIFO)
980 * Select nSample mode
981 * BCLK is only running when data is needed by DAC33
982 */
983 fifoctrl_a &= ~DAC33_FBYPAS;
984 fifoctrl_a &= ~DAC33_FAUTO;
985 if (dac33->keep_bclk)
986 aictrl_b |= DAC33_BCLKON;
987 else
988 aictrl_b &= ~DAC33_BCLKON;
989 break;
990 case DAC33_FIFO_MODE7:
991 /*
992 * For mode1:
993 * Disable the FIFO bypass (Enable the use of FIFO)
994 * Select Threshold mode
995 * BCLK is only running when data is needed by DAC33
996 */
997 fifoctrl_a &= ~DAC33_FBYPAS;
998 fifoctrl_a |= DAC33_FAUTO;
999 if (dac33->keep_bclk)
1000 aictrl_b |= DAC33_BCLKON;
1001 else
1002 aictrl_b &= ~DAC33_BCLKON;
1003 break;
1004 default:
1005 /*
1006 * For FIFO bypass mode:
1007 * Enable the FIFO bypass (Disable the FIFO use)
1008 * Set the BCLK as continuous
1009 */
1010 fifoctrl_a |= DAC33_FBYPAS;
1011 aictrl_b |= DAC33_BCLKON;
1012 break;
1013 }
1014
1015 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1016 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1017 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1018
1019 /*
1020 * BCLK divide ratio
1021 * 0: 1.5
1022 * 1: 1
1023 * 2: 2
1024 * ...
1025 * 254: 254
1026 * 255: 255
1027 */
1028 if (dac33->fifo_mode)
1029 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1030 dac33->burst_bclkdiv);
1031 else
1032 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1033 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1034 else
1035 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
1036
1037 switch (dac33->fifo_mode) {
1038 case DAC33_FIFO_MODE1:
1039 dac33_write16(codec, DAC33_ATHR_MSB,
1040 DAC33_THRREG(dac33->alarm_threshold));
1041 break;
1042 case DAC33_FIFO_MODE7:
1043 /*
1044 * Configure the threshold levels, and leave 10 sample space
1045 * at the bottom, and also at the top of the FIFO
1046 */
1047 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1048 dac33_write16(codec, DAC33_LTHR_MSB,
1049 DAC33_THRREG(DAC33_MODE7_MARGIN));
1050 break;
1051 default:
1052 break;
1053 }
1054
1055 mutex_unlock(&dac33->mutex);
1056
1057 return 0;
1058 }
1059
1060 static void dac33_calculate_times(struct snd_pcm_substream *substream,
1061 struct snd_soc_codec *codec)
1062 {
1063 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1064 unsigned int period_size = substream->runtime->period_size;
1065 unsigned int rate = substream->runtime->rate;
1066 unsigned int nsample_limit;
1067
1068 /* In bypass mode we don't need to calculate */
1069 if (!dac33->fifo_mode)
1070 return;
1071
1072 switch (dac33->fifo_mode) {
1073 case DAC33_FIFO_MODE1:
1074 /* Number of samples under i2c latency */
1075 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1076 dac33->mode1_latency);
1077 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1078
1079 if (period_size <= dac33->alarm_threshold)
1080 /*
1081 * Configure nSamaple to number of periods,
1082 * which covers the latency requironment.
1083 */
1084 dac33->nsample = period_size *
1085 ((dac33->alarm_threshold / period_size) +
1086 (dac33->alarm_threshold % period_size ?
1087 1 : 0));
1088 else if (period_size > nsample_limit)
1089 dac33->nsample = nsample_limit;
1090 else
1091 dac33->nsample = period_size;
1092
1093 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1094 dac33->nsample);
1095 dac33->t_stamp1 = 0;
1096 dac33->t_stamp2 = 0;
1097 break;
1098 case DAC33_FIFO_MODE7:
1099 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1100 dac33->burst_rate) + 9;
1101 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1102 dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1103 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1104 dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1105
1106 dac33->mode7_us_to_lthr =
1107 SAMPLES_TO_US(substream->runtime->rate,
1108 dac33->uthr - DAC33_MODE7_MARGIN + 1);
1109 dac33->t_stamp1 = 0;
1110 break;
1111 default:
1112 break;
1113 }
1114
1115 }
1116
1117 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1118 struct snd_soc_dai *dai)
1119 {
1120 struct snd_soc_codec *codec = dai->codec;
1121 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1122 int ret = 0;
1123
1124 switch (cmd) {
1125 case SNDRV_PCM_TRIGGER_START:
1126 case SNDRV_PCM_TRIGGER_RESUME:
1127 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1128 if (dac33->fifo_mode) {
1129 dac33->state = DAC33_PREFILL;
1130 queue_work(dac33->dac33_wq, &dac33->work);
1131 }
1132 break;
1133 case SNDRV_PCM_TRIGGER_STOP:
1134 case SNDRV_PCM_TRIGGER_SUSPEND:
1135 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1136 if (dac33->fifo_mode) {
1137 dac33->state = DAC33_FLUSH;
1138 queue_work(dac33->dac33_wq, &dac33->work);
1139 }
1140 break;
1141 default:
1142 ret = -EINVAL;
1143 }
1144
1145 return ret;
1146 }
1147
1148 static snd_pcm_sframes_t dac33_dai_delay(
1149 struct snd_pcm_substream *substream,
1150 struct snd_soc_dai *dai)
1151 {
1152 struct snd_soc_codec *codec = dai->codec;
1153 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1154 unsigned long long t0, t1, t_now;
1155 unsigned int time_delta, uthr;
1156 int samples_out, samples_in, samples;
1157 snd_pcm_sframes_t delay = 0;
1158 unsigned long flags;
1159
1160 switch (dac33->fifo_mode) {
1161 case DAC33_FIFO_BYPASS:
1162 break;
1163 case DAC33_FIFO_MODE1:
1164 spin_lock_irqsave(&dac33->lock, flags);
1165 t0 = dac33->t_stamp1;
1166 t1 = dac33->t_stamp2;
1167 spin_unlock_irqrestore(&dac33->lock, flags);
1168 t_now = ktime_to_us(ktime_get());
1169
1170 /* We have not started to fill the FIFO yet, delay is 0 */
1171 if (!t1)
1172 goto out;
1173
1174 if (t0 > t1) {
1175 /*
1176 * Phase 1:
1177 * After Alarm threshold, and before nSample write
1178 */
1179 time_delta = t_now - t0;
1180 samples_out = time_delta ? US_TO_SAMPLES(
1181 substream->runtime->rate,
1182 time_delta) : 0;
1183
1184 if (likely(dac33->alarm_threshold > samples_out))
1185 delay = dac33->alarm_threshold - samples_out;
1186 else
1187 delay = 0;
1188 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1189 /*
1190 * Phase 2:
1191 * After nSample write (during burst operation)
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 time_delta = t_now - t1;
1199 samples_in = time_delta ? US_TO_SAMPLES(
1200 dac33->burst_rate,
1201 time_delta) : 0;
1202
1203 samples = dac33->alarm_threshold;
1204 samples += (samples_in - samples_out);
1205
1206 if (likely(samples > 0))
1207 delay = samples;
1208 else
1209 delay = 0;
1210 } else {
1211 /*
1212 * Phase 3:
1213 * After burst operation, before next alarm threshold
1214 */
1215 time_delta = t_now - t0;
1216 samples_out = time_delta ? US_TO_SAMPLES(
1217 substream->runtime->rate,
1218 time_delta) : 0;
1219
1220 samples_in = dac33->nsample;
1221 samples = dac33->alarm_threshold;
1222 samples += (samples_in - samples_out);
1223
1224 if (likely(samples > 0))
1225 delay = samples > dac33->fifo_size ?
1226 dac33->fifo_size : samples;
1227 else
1228 delay = 0;
1229 }
1230 break;
1231 case DAC33_FIFO_MODE7:
1232 spin_lock_irqsave(&dac33->lock, flags);
1233 t0 = dac33->t_stamp1;
1234 uthr = dac33->uthr;
1235 spin_unlock_irqrestore(&dac33->lock, flags);
1236 t_now = ktime_to_us(ktime_get());
1237
1238 /* We have not started to fill the FIFO yet, delay is 0 */
1239 if (!t0)
1240 goto out;
1241
1242 if (t_now <= t0) {
1243 /*
1244 * Either the timestamps are messed or equal. Report
1245 * maximum delay
1246 */
1247 delay = uthr;
1248 goto out;
1249 }
1250
1251 time_delta = t_now - t0;
1252 if (time_delta <= dac33->mode7_us_to_lthr) {
1253 /*
1254 * Phase 1:
1255 * After burst (draining phase)
1256 */
1257 samples_out = US_TO_SAMPLES(
1258 substream->runtime->rate,
1259 time_delta);
1260
1261 if (likely(uthr > samples_out))
1262 delay = uthr - samples_out;
1263 else
1264 delay = 0;
1265 } else {
1266 /*
1267 * Phase 2:
1268 * During burst operation
1269 */
1270 time_delta = time_delta - dac33->mode7_us_to_lthr;
1271
1272 samples_out = US_TO_SAMPLES(
1273 substream->runtime->rate,
1274 time_delta);
1275 samples_in = US_TO_SAMPLES(
1276 dac33->burst_rate,
1277 time_delta);
1278 delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1279
1280 if (unlikely(delay > uthr))
1281 delay = uthr;
1282 }
1283 break;
1284 default:
1285 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1286 dac33->fifo_mode);
1287 break;
1288 }
1289 out:
1290 return delay;
1291 }
1292
1293 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1294 int clk_id, unsigned int freq, int dir)
1295 {
1296 struct snd_soc_codec *codec = codec_dai->codec;
1297 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1298 u8 ioc_reg, asrcb_reg;
1299
1300 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1301 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1302 switch (clk_id) {
1303 case TLV320DAC33_MCLK:
1304 ioc_reg |= DAC33_REFSEL;
1305 asrcb_reg |= DAC33_SRCREFSEL;
1306 break;
1307 case TLV320DAC33_SLEEPCLK:
1308 ioc_reg &= ~DAC33_REFSEL;
1309 asrcb_reg &= ~DAC33_SRCREFSEL;
1310 break;
1311 default:
1312 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1313 break;
1314 }
1315 dac33->refclk = freq;
1316
1317 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1318 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1319
1320 return 0;
1321 }
1322
1323 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1324 unsigned int fmt)
1325 {
1326 struct snd_soc_codec *codec = codec_dai->codec;
1327 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1328 u8 aictrl_a, aictrl_b;
1329
1330 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1331 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1332 /* set master/slave audio interface */
1333 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1334 case SND_SOC_DAIFMT_CBM_CFM:
1335 /* Codec Master */
1336 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1337 break;
1338 case SND_SOC_DAIFMT_CBS_CFS:
1339 /* Codec Slave */
1340 if (dac33->fifo_mode) {
1341 dev_err(codec->dev, "FIFO mode requires master mode\n");
1342 return -EINVAL;
1343 } else
1344 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1345 break;
1346 default:
1347 return -EINVAL;
1348 }
1349
1350 aictrl_a &= ~DAC33_AFMT_MASK;
1351 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1352 case SND_SOC_DAIFMT_I2S:
1353 aictrl_a |= DAC33_AFMT_I2S;
1354 break;
1355 case SND_SOC_DAIFMT_DSP_A:
1356 aictrl_a |= DAC33_AFMT_DSP;
1357 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1358 aictrl_b |= DAC33_DATA_DELAY(0);
1359 break;
1360 case SND_SOC_DAIFMT_RIGHT_J:
1361 aictrl_a |= DAC33_AFMT_RIGHT_J;
1362 break;
1363 case SND_SOC_DAIFMT_LEFT_J:
1364 aictrl_a |= DAC33_AFMT_LEFT_J;
1365 break;
1366 default:
1367 dev_err(codec->dev, "Unsupported format (%u)\n",
1368 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1369 return -EINVAL;
1370 }
1371
1372 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1373 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1374
1375 return 0;
1376 }
1377
1378 static int dac33_soc_probe(struct snd_soc_codec *codec)
1379 {
1380 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1381 int ret = 0;
1382
1383 codec->control_data = dac33->control_data;
1384 codec->hw_write = (hw_write_t) i2c_master_send;
1385 dac33->codec = codec;
1386
1387 /* Read the tlv320dac33 ID registers */
1388 ret = dac33_hard_power(codec, 1);
1389 if (ret != 0) {
1390 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1391 goto err_power;
1392 }
1393 ret = dac33_read_id(codec);
1394 dac33_hard_power(codec, 0);
1395
1396 if (ret < 0) {
1397 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1398 ret = -ENODEV;
1399 goto err_power;
1400 }
1401
1402 /* Check if the IRQ number is valid and request it */
1403 if (dac33->irq >= 0) {
1404 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1405 IRQF_TRIGGER_RISING,
1406 codec->component.name, codec);
1407 if (ret < 0) {
1408 dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1409 dac33->irq, ret);
1410 dac33->irq = -1;
1411 }
1412 if (dac33->irq != -1) {
1413 /* Setup work queue */
1414 dac33->dac33_wq =
1415 create_singlethread_workqueue("tlv320dac33");
1416 if (dac33->dac33_wq == NULL) {
1417 free_irq(dac33->irq, codec);
1418 return -ENOMEM;
1419 }
1420
1421 INIT_WORK(&dac33->work, dac33_work);
1422 }
1423 }
1424
1425 /* Only add the FIFO controls, if we have valid IRQ number */
1426 if (dac33->irq >= 0)
1427 snd_soc_add_codec_controls(codec, dac33_mode_snd_controls,
1428 ARRAY_SIZE(dac33_mode_snd_controls));
1429
1430 err_power:
1431 return ret;
1432 }
1433
1434 static int dac33_soc_remove(struct snd_soc_codec *codec)
1435 {
1436 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1437
1438 if (dac33->irq >= 0) {
1439 free_irq(dac33->irq, dac33->codec);
1440 destroy_workqueue(dac33->dac33_wq);
1441 }
1442 return 0;
1443 }
1444
1445 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1446 .read = dac33_read_reg_cache,
1447 .write = dac33_write_locked,
1448 .set_bias_level = dac33_set_bias_level,
1449 .idle_bias_off = true,
1450 .reg_cache_size = ARRAY_SIZE(dac33_reg),
1451 .reg_word_size = sizeof(u8),
1452 .reg_cache_default = dac33_reg,
1453 .probe = dac33_soc_probe,
1454 .remove = dac33_soc_remove,
1455
1456 .component_driver = {
1457 .controls = dac33_snd_controls,
1458 .num_controls = ARRAY_SIZE(dac33_snd_controls),
1459 .dapm_widgets = dac33_dapm_widgets,
1460 .num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets),
1461 .dapm_routes = audio_map,
1462 .num_dapm_routes = ARRAY_SIZE(audio_map),
1463 },
1464 };
1465
1466 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1467 SNDRV_PCM_RATE_48000)
1468 #define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1469
1470 static const struct snd_soc_dai_ops dac33_dai_ops = {
1471 .startup = dac33_startup,
1472 .shutdown = dac33_shutdown,
1473 .hw_params = dac33_hw_params,
1474 .trigger = dac33_pcm_trigger,
1475 .delay = dac33_dai_delay,
1476 .set_sysclk = dac33_set_dai_sysclk,
1477 .set_fmt = dac33_set_dai_fmt,
1478 };
1479
1480 static struct snd_soc_dai_driver dac33_dai = {
1481 .name = "tlv320dac33-hifi",
1482 .playback = {
1483 .stream_name = "Playback",
1484 .channels_min = 2,
1485 .channels_max = 2,
1486 .rates = DAC33_RATES,
1487 .formats = DAC33_FORMATS,
1488 .sig_bits = 24,
1489 },
1490 .ops = &dac33_dai_ops,
1491 };
1492
1493 static int dac33_i2c_probe(struct i2c_client *client,
1494 const struct i2c_device_id *id)
1495 {
1496 struct tlv320dac33_platform_data *pdata;
1497 struct tlv320dac33_priv *dac33;
1498 int ret, i;
1499
1500 if (client->dev.platform_data == NULL) {
1501 dev_err(&client->dev, "Platform data not set\n");
1502 return -ENODEV;
1503 }
1504 pdata = client->dev.platform_data;
1505
1506 dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
1507 GFP_KERNEL);
1508 if (dac33 == NULL)
1509 return -ENOMEM;
1510
1511 dac33->control_data = client;
1512 mutex_init(&dac33->mutex);
1513 spin_lock_init(&dac33->lock);
1514
1515 i2c_set_clientdata(client, dac33);
1516
1517 dac33->power_gpio = pdata->power_gpio;
1518 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1519 dac33->keep_bclk = pdata->keep_bclk;
1520 dac33->mode1_latency = pdata->mode1_latency;
1521 if (!dac33->mode1_latency)
1522 dac33->mode1_latency = 10000; /* 10ms */
1523 dac33->irq = client->irq;
1524 /* Disable FIFO use by default */
1525 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1526
1527 /* Check if the reset GPIO number is valid and request it */
1528 if (dac33->power_gpio >= 0) {
1529 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1530 if (ret < 0) {
1531 dev_err(&client->dev,
1532 "Failed to request reset GPIO (%d)\n",
1533 dac33->power_gpio);
1534 goto err_gpio;
1535 }
1536 gpio_direction_output(dac33->power_gpio, 0);
1537 }
1538
1539 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1540 dac33->supplies[i].supply = dac33_supply_names[i];
1541
1542 ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1543 dac33->supplies);
1544
1545 if (ret != 0) {
1546 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1547 goto err_get;
1548 }
1549
1550 ret = snd_soc_register_codec(&client->dev,
1551 &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1552 if (ret < 0)
1553 goto err_get;
1554
1555 return ret;
1556 err_get:
1557 if (dac33->power_gpio >= 0)
1558 gpio_free(dac33->power_gpio);
1559 err_gpio:
1560 return ret;
1561 }
1562
1563 static int dac33_i2c_remove(struct i2c_client *client)
1564 {
1565 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1566
1567 if (unlikely(dac33->chip_power))
1568 dac33_hard_power(dac33->codec, 0);
1569
1570 if (dac33->power_gpio >= 0)
1571 gpio_free(dac33->power_gpio);
1572
1573 snd_soc_unregister_codec(&client->dev);
1574 return 0;
1575 }
1576
1577 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1578 {
1579 .name = "tlv320dac33",
1580 .driver_data = 0,
1581 },
1582 { },
1583 };
1584 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1585
1586 static struct i2c_driver tlv320dac33_i2c_driver = {
1587 .driver = {
1588 .name = "tlv320dac33-codec",
1589 },
1590 .probe = dac33_i2c_probe,
1591 .remove = dac33_i2c_remove,
1592 .id_table = tlv320dac33_i2c_id,
1593 };
1594
1595 module_i2c_driver(tlv320dac33_i2c_driver);
1596
1597 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1598 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1599 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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