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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/tlv320dac33.c

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  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 tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec);
427 
428         switch (event) {
429         case SND_SOC_DAPM_PRE_PMU:
430                 if (likely(dac33->substream)) {
431                         dac33_calculate_times(dac33->substream, w->codec);
432                         dac33_prepare_chip(dac33->substream, w->codec);
433                 }
434                 break;
435         case SND_SOC_DAPM_POST_PMD:
436                 dac33_disable_digital(w->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.integer.value[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.integer.value[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.integer.value[0] < 0 ||
467             ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
468                 ret = -EINVAL;
469         else
470                 dac33->fifo_mode = ucontrol->value.integer.value[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 (codec->dapm.bias_level == 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 (codec->dapm.bias_level == 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         codec->dapm.bias_level = level;
654 
655         return 0;
656 }
657 
658 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
659 {
660         struct snd_soc_codec *codec = dac33->codec;
661         unsigned int delay;
662         unsigned long flags;
663 
664         switch (dac33->fifo_mode) {
665         case DAC33_FIFO_MODE1:
666                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
667                         DAC33_THRREG(dac33->nsample));
668 
669                 /* Take the timestamps */
670                 spin_lock_irqsave(&dac33->lock, flags);
671                 dac33->t_stamp2 = ktime_to_us(ktime_get());
672                 dac33->t_stamp1 = dac33->t_stamp2;
673                 spin_unlock_irqrestore(&dac33->lock, flags);
674 
675                 dac33_write16(codec, DAC33_PREFILL_MSB,
676                                 DAC33_THRREG(dac33->alarm_threshold));
677                 /* Enable Alarm Threshold IRQ with a delay */
678                 delay = SAMPLES_TO_US(dac33->burst_rate,
679                                      dac33->alarm_threshold) + 1000;
680                 usleep_range(delay, delay + 500);
681                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
682                 break;
683         case DAC33_FIFO_MODE7:
684                 /* Take the timestamp */
685                 spin_lock_irqsave(&dac33->lock, flags);
686                 dac33->t_stamp1 = ktime_to_us(ktime_get());
687                 /* Move back the timestamp with drain time */
688                 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
689                 spin_unlock_irqrestore(&dac33->lock, flags);
690 
691                 dac33_write16(codec, DAC33_PREFILL_MSB,
692                                 DAC33_THRREG(DAC33_MODE7_MARGIN));
693 
694                 /* Enable Upper Threshold IRQ */
695                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
696                 break;
697         default:
698                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
699                                                         dac33->fifo_mode);
700                 break;
701         }
702 }
703 
704 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
705 {
706         struct snd_soc_codec *codec = dac33->codec;
707         unsigned long flags;
708 
709         switch (dac33->fifo_mode) {
710         case DAC33_FIFO_MODE1:
711                 /* Take the timestamp */
712                 spin_lock_irqsave(&dac33->lock, flags);
713                 dac33->t_stamp2 = ktime_to_us(ktime_get());
714                 spin_unlock_irqrestore(&dac33->lock, flags);
715 
716                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
717                                 DAC33_THRREG(dac33->nsample));
718                 break;
719         case DAC33_FIFO_MODE7:
720                 /* At the moment we are not using interrupts in mode7 */
721                 break;
722         default:
723                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
724                                                         dac33->fifo_mode);
725                 break;
726         }
727 }
728 
729 static void dac33_work(struct work_struct *work)
730 {
731         struct snd_soc_codec *codec;
732         struct tlv320dac33_priv *dac33;
733         u8 reg;
734 
735         dac33 = container_of(work, struct tlv320dac33_priv, work);
736         codec = dac33->codec;
737 
738         mutex_lock(&dac33->mutex);
739         switch (dac33->state) {
740         case DAC33_PREFILL:
741                 dac33->state = DAC33_PLAYBACK;
742                 dac33_prefill_handler(dac33);
743                 break;
744         case DAC33_PLAYBACK:
745                 dac33_playback_handler(dac33);
746                 break;
747         case DAC33_IDLE:
748                 break;
749         case DAC33_FLUSH:
750                 dac33->state = DAC33_IDLE;
751                 /* Mask all interrupts from dac33 */
752                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
753 
754                 /* flush fifo */
755                 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
756                 reg |= DAC33_FIFOFLUSH;
757                 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
758                 break;
759         }
760         mutex_unlock(&dac33->mutex);
761 }
762 
763 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
764 {
765         struct snd_soc_codec *codec = dev;
766         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
767         unsigned long flags;
768 
769         spin_lock_irqsave(&dac33->lock, flags);
770         dac33->t_stamp1 = ktime_to_us(ktime_get());
771         spin_unlock_irqrestore(&dac33->lock, flags);
772 
773         /* Do not schedule the workqueue in Mode7 */
774         if (dac33->fifo_mode != DAC33_FIFO_MODE7)
775                 queue_work(dac33->dac33_wq, &dac33->work);
776 
777         return IRQ_HANDLED;
778 }
779 
780 static void dac33_oscwait(struct snd_soc_codec *codec)
781 {
782         int timeout = 60;
783         u8 reg;
784 
785         do {
786                 usleep_range(1000, 2000);
787                 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
788         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
789         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
790                 dev_err(codec->dev,
791                         "internal oscillator calibration failed\n");
792 }
793 
794 static int dac33_startup(struct snd_pcm_substream *substream,
795                            struct snd_soc_dai *dai)
796 {
797         struct snd_soc_codec *codec = dai->codec;
798         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
799 
800         /* Stream started, save the substream pointer */
801         dac33->substream = substream;
802 
803         return 0;
804 }
805 
806 static void dac33_shutdown(struct snd_pcm_substream *substream,
807                              struct snd_soc_dai *dai)
808 {
809         struct snd_soc_codec *codec = dai->codec;
810         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
811 
812         dac33->substream = NULL;
813 }
814 
815 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
816         (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
817 static int dac33_hw_params(struct snd_pcm_substream *substream,
818                            struct snd_pcm_hw_params *params,
819                            struct snd_soc_dai *dai)
820 {
821         struct snd_soc_codec *codec = dai->codec;
822         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
823 
824         /* Check parameters for validity */
825         switch (params_rate(params)) {
826         case 44100:
827         case 48000:
828                 break;
829         default:
830                 dev_err(codec->dev, "unsupported rate %d\n",
831                         params_rate(params));
832                 return -EINVAL;
833         }
834 
835         switch (params_format(params)) {
836         case SNDRV_PCM_FORMAT_S16_LE:
837                 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
838                 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
839                 break;
840         case SNDRV_PCM_FORMAT_S32_LE:
841                 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
842                 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
843                 break;
844         default:
845                 dev_err(codec->dev, "unsupported format %d\n",
846                         params_format(params));
847                 return -EINVAL;
848         }
849 
850         return 0;
851 }
852 
853 #define CALC_OSCSET(rate, refclk) ( \
854         ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
855 #define CALC_RATIOSET(rate, refclk) ( \
856         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
857 
858 /*
859  * tlv320dac33 is strict on the sequence of the register writes, if the register
860  * writes happens in different order, than dac33 might end up in unknown state.
861  * Use the known, working sequence of register writes to initialize the dac33.
862  */
863 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
864                               struct snd_soc_codec *codec)
865 {
866         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
867         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
868         u8 aictrl_a, aictrl_b, fifoctrl_a;
869 
870         switch (substream->runtime->rate) {
871         case 44100:
872         case 48000:
873                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
874                 ratioset = CALC_RATIOSET(substream->runtime->rate,
875                                          dac33->refclk);
876                 break;
877         default:
878                 dev_err(codec->dev, "unsupported rate %d\n",
879                         substream->runtime->rate);
880                 return -EINVAL;
881         }
882 
883 
884         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
885         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
886         /* Read FIFO control A, and clear FIFO flush bit */
887         fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
888         fifoctrl_a &= ~DAC33_FIFOFLUSH;
889 
890         fifoctrl_a &= ~DAC33_WIDTH;
891         switch (substream->runtime->format) {
892         case SNDRV_PCM_FORMAT_S16_LE:
893                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
894                 fifoctrl_a |= DAC33_WIDTH;
895                 break;
896         case SNDRV_PCM_FORMAT_S32_LE:
897                 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
898                 break;
899         default:
900                 dev_err(codec->dev, "unsupported format %d\n",
901                         substream->runtime->format);
902                 return -EINVAL;
903         }
904 
905         mutex_lock(&dac33->mutex);
906 
907         if (!dac33->chip_power) {
908                 /*
909                  * Chip is not powered yet.
910                  * Do the init in the dac33_set_bias_level later.
911                  */
912                 mutex_unlock(&dac33->mutex);
913                 return 0;
914         }
915 
916         dac33_soft_power(codec, 0);
917         dac33_soft_power(codec, 1);
918 
919         reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
920         dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
921 
922         /* Write registers 0x08 and 0x09 (MSB, LSB) */
923         dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
924 
925         /* OSC calibration time */
926         dac33_write(codec, DAC33_CALIB_TIME, 96);
927 
928         /* adjustment treshold & step */
929         dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
930                                                  DAC33_ADJSTEP(1));
931 
932         /* div=4 / gain=1 / div */
933         dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
934 
935         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
936         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
937         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
938 
939         dac33_oscwait(codec);
940 
941         if (dac33->fifo_mode) {
942                 /* Generic for all FIFO modes */
943                 /* 50-51 : ASRC Control registers */
944                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
945                 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
946 
947                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
948                 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
949 
950                 /* Set interrupts to high active */
951                 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
952         } else {
953                 /* FIFO bypass mode */
954                 /* 50-51 : ASRC Control registers */
955                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
956                 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
957         }
958 
959         /* Interrupt behaviour configuration */
960         switch (dac33->fifo_mode) {
961         case DAC33_FIFO_MODE1:
962                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
963                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
964                 break;
965         case DAC33_FIFO_MODE7:
966                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
967                         DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
968                 break;
969         default:
970                 /* in FIFO bypass mode, the interrupts are not used */
971                 break;
972         }
973 
974         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
975 
976         switch (dac33->fifo_mode) {
977         case DAC33_FIFO_MODE1:
978                 /*
979                  * For mode1:
980                  * Disable the FIFO bypass (Enable the use of FIFO)
981                  * Select nSample mode
982                  * BCLK is only running when data is needed by DAC33
983                  */
984                 fifoctrl_a &= ~DAC33_FBYPAS;
985                 fifoctrl_a &= ~DAC33_FAUTO;
986                 if (dac33->keep_bclk)
987                         aictrl_b |= DAC33_BCLKON;
988                 else
989                         aictrl_b &= ~DAC33_BCLKON;
990                 break;
991         case DAC33_FIFO_MODE7:
992                 /*
993                  * For mode1:
994                  * Disable the FIFO bypass (Enable the use of FIFO)
995                  * Select Threshold mode
996                  * BCLK is only running when data is needed by DAC33
997                  */
998                 fifoctrl_a &= ~DAC33_FBYPAS;
999                 fifoctrl_a |= DAC33_FAUTO;
1000                 if (dac33->keep_bclk)
1001                         aictrl_b |= DAC33_BCLKON;
1002                 else
1003                         aictrl_b &= ~DAC33_BCLKON;
1004                 break;
1005         default:
1006                 /*
1007                  * For FIFO bypass mode:
1008                  * Enable the FIFO bypass (Disable the FIFO use)
1009                  * Set the BCLK as continuous
1010                  */
1011                 fifoctrl_a |= DAC33_FBYPAS;
1012                 aictrl_b |= DAC33_BCLKON;
1013                 break;
1014         }
1015 
1016         dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1017         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1018         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1019 
1020         /*
1021          * BCLK divide ratio
1022          * 0: 1.5
1023          * 1: 1
1024          * 2: 2
1025          * ...
1026          * 254: 254
1027          * 255: 255
1028          */
1029         if (dac33->fifo_mode)
1030                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1031                                                         dac33->burst_bclkdiv);
1032         else
1033                 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1034                         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1035                 else
1036                         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
1037 
1038         switch (dac33->fifo_mode) {
1039         case DAC33_FIFO_MODE1:
1040                 dac33_write16(codec, DAC33_ATHR_MSB,
1041                               DAC33_THRREG(dac33->alarm_threshold));
1042                 break;
1043         case DAC33_FIFO_MODE7:
1044                 /*
1045                  * Configure the threshold levels, and leave 10 sample space
1046                  * at the bottom, and also at the top of the FIFO
1047                  */
1048                 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1049                 dac33_write16(codec, DAC33_LTHR_MSB,
1050                               DAC33_THRREG(DAC33_MODE7_MARGIN));
1051                 break;
1052         default:
1053                 break;
1054         }
1055 
1056         mutex_unlock(&dac33->mutex);
1057 
1058         return 0;
1059 }
1060 
1061 static void dac33_calculate_times(struct snd_pcm_substream *substream,
1062                                   struct snd_soc_codec *codec)
1063 {
1064         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1065         unsigned int period_size = substream->runtime->period_size;
1066         unsigned int rate = substream->runtime->rate;
1067         unsigned int nsample_limit;
1068 
1069         /* In bypass mode we don't need to calculate */
1070         if (!dac33->fifo_mode)
1071                 return;
1072 
1073         switch (dac33->fifo_mode) {
1074         case DAC33_FIFO_MODE1:
1075                 /* Number of samples under i2c latency */
1076                 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1077                                                 dac33->mode1_latency);
1078                 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1079 
1080                 if (period_size <= dac33->alarm_threshold)
1081                         /*
1082                          * Configure nSamaple to number of periods,
1083                          * which covers the latency requironment.
1084                          */
1085                         dac33->nsample = period_size *
1086                                 ((dac33->alarm_threshold / period_size) +
1087                                 (dac33->alarm_threshold % period_size ?
1088                                 1 : 0));
1089                 else if (period_size > nsample_limit)
1090                         dac33->nsample = nsample_limit;
1091                 else
1092                         dac33->nsample = period_size;
1093 
1094                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1095                                                       dac33->nsample);
1096                 dac33->t_stamp1 = 0;
1097                 dac33->t_stamp2 = 0;
1098                 break;
1099         case DAC33_FIFO_MODE7:
1100                 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1101                                                     dac33->burst_rate) + 9;
1102                 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1103                         dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1104                 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1105                         dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1106 
1107                 dac33->mode7_us_to_lthr =
1108                                 SAMPLES_TO_US(substream->runtime->rate,
1109                                         dac33->uthr - DAC33_MODE7_MARGIN + 1);
1110                 dac33->t_stamp1 = 0;
1111                 break;
1112         default:
1113                 break;
1114         }
1115 
1116 }
1117 
1118 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1119                              struct snd_soc_dai *dai)
1120 {
1121         struct snd_soc_codec *codec = dai->codec;
1122         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1123         int ret = 0;
1124 
1125         switch (cmd) {
1126         case SNDRV_PCM_TRIGGER_START:
1127         case SNDRV_PCM_TRIGGER_RESUME:
1128         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1129                 if (dac33->fifo_mode) {
1130                         dac33->state = DAC33_PREFILL;
1131                         queue_work(dac33->dac33_wq, &dac33->work);
1132                 }
1133                 break;
1134         case SNDRV_PCM_TRIGGER_STOP:
1135         case SNDRV_PCM_TRIGGER_SUSPEND:
1136         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1137                 if (dac33->fifo_mode) {
1138                         dac33->state = DAC33_FLUSH;
1139                         queue_work(dac33->dac33_wq, &dac33->work);
1140                 }
1141                 break;
1142         default:
1143                 ret = -EINVAL;
1144         }
1145 
1146         return ret;
1147 }
1148 
1149 static snd_pcm_sframes_t dac33_dai_delay(
1150                         struct snd_pcm_substream *substream,
1151                         struct snd_soc_dai *dai)
1152 {
1153         struct snd_soc_codec *codec = dai->codec;
1154         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1155         unsigned long long t0, t1, t_now;
1156         unsigned int time_delta, uthr;
1157         int samples_out, samples_in, samples;
1158         snd_pcm_sframes_t delay = 0;
1159         unsigned long flags;
1160 
1161         switch (dac33->fifo_mode) {
1162         case DAC33_FIFO_BYPASS:
1163                 break;
1164         case DAC33_FIFO_MODE1:
1165                 spin_lock_irqsave(&dac33->lock, flags);
1166                 t0 = dac33->t_stamp1;
1167                 t1 = dac33->t_stamp2;
1168                 spin_unlock_irqrestore(&dac33->lock, flags);
1169                 t_now = ktime_to_us(ktime_get());
1170 
1171                 /* We have not started to fill the FIFO yet, delay is 0 */
1172                 if (!t1)
1173                         goto out;
1174 
1175                 if (t0 > t1) {
1176                         /*
1177                          * Phase 1:
1178                          * After Alarm threshold, and before nSample write
1179                          */
1180                         time_delta = t_now - t0;
1181                         samples_out = time_delta ? US_TO_SAMPLES(
1182                                                 substream->runtime->rate,
1183                                                 time_delta) : 0;
1184 
1185                         if (likely(dac33->alarm_threshold > samples_out))
1186                                 delay = dac33->alarm_threshold - samples_out;
1187                         else
1188                                 delay = 0;
1189                 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1190                         /*
1191                          * Phase 2:
1192                          * After nSample write (during burst operation)
1193                          */
1194                         time_delta = t_now - t0;
1195                         samples_out = time_delta ? US_TO_SAMPLES(
1196                                                 substream->runtime->rate,
1197                                                 time_delta) : 0;
1198 
1199                         time_delta = t_now - t1;
1200                         samples_in = time_delta ? US_TO_SAMPLES(
1201                                                 dac33->burst_rate,
1202                                                 time_delta) : 0;
1203 
1204                         samples = dac33->alarm_threshold;
1205                         samples += (samples_in - samples_out);
1206 
1207                         if (likely(samples > 0))
1208                                 delay = samples;
1209                         else
1210                                 delay = 0;
1211                 } else {
1212                         /*
1213                          * Phase 3:
1214                          * After burst operation, before next alarm threshold
1215                          */
1216                         time_delta = t_now - t0;
1217                         samples_out = time_delta ? US_TO_SAMPLES(
1218                                                 substream->runtime->rate,
1219                                                 time_delta) : 0;
1220 
1221                         samples_in = dac33->nsample;
1222                         samples = dac33->alarm_threshold;
1223                         samples += (samples_in - samples_out);
1224 
1225                         if (likely(samples > 0))
1226                                 delay = samples > dac33->fifo_size ?
1227                                         dac33->fifo_size : samples;
1228                         else
1229                                 delay = 0;
1230                 }
1231                 break;
1232         case DAC33_FIFO_MODE7:
1233                 spin_lock_irqsave(&dac33->lock, flags);
1234                 t0 = dac33->t_stamp1;
1235                 uthr = dac33->uthr;
1236                 spin_unlock_irqrestore(&dac33->lock, flags);
1237                 t_now = ktime_to_us(ktime_get());
1238 
1239                 /* We have not started to fill the FIFO yet, delay is 0 */
1240                 if (!t0)
1241                         goto out;
1242 
1243                 if (t_now <= t0) {
1244                         /*
1245                          * Either the timestamps are messed or equal. Report
1246                          * maximum delay
1247                          */
1248                         delay = uthr;
1249                         goto out;
1250                 }
1251 
1252                 time_delta = t_now - t0;
1253                 if (time_delta <= dac33->mode7_us_to_lthr) {
1254                         /*
1255                         * Phase 1:
1256                         * After burst (draining phase)
1257                         */
1258                         samples_out = US_TO_SAMPLES(
1259                                         substream->runtime->rate,
1260                                         time_delta);
1261 
1262                         if (likely(uthr > samples_out))
1263                                 delay = uthr - samples_out;
1264                         else
1265                                 delay = 0;
1266                 } else {
1267                         /*
1268                         * Phase 2:
1269                         * During burst operation
1270                         */
1271                         time_delta = time_delta - dac33->mode7_us_to_lthr;
1272 
1273                         samples_out = US_TO_SAMPLES(
1274                                         substream->runtime->rate,
1275                                         time_delta);
1276                         samples_in = US_TO_SAMPLES(
1277                                         dac33->burst_rate,
1278                                         time_delta);
1279                         delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1280 
1281                         if (unlikely(delay > uthr))
1282                                 delay = uthr;
1283                 }
1284                 break;
1285         default:
1286                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1287                                                         dac33->fifo_mode);
1288                 break;
1289         }
1290 out:
1291         return delay;
1292 }
1293 
1294 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1295                 int clk_id, unsigned int freq, int dir)
1296 {
1297         struct snd_soc_codec *codec = codec_dai->codec;
1298         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1299         u8 ioc_reg, asrcb_reg;
1300 
1301         ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1302         asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1303         switch (clk_id) {
1304         case TLV320DAC33_MCLK:
1305                 ioc_reg |= DAC33_REFSEL;
1306                 asrcb_reg |= DAC33_SRCREFSEL;
1307                 break;
1308         case TLV320DAC33_SLEEPCLK:
1309                 ioc_reg &= ~DAC33_REFSEL;
1310                 asrcb_reg &= ~DAC33_SRCREFSEL;
1311                 break;
1312         default:
1313                 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1314                 break;
1315         }
1316         dac33->refclk = freq;
1317 
1318         dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1319         dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1320 
1321         return 0;
1322 }
1323 
1324 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1325                              unsigned int fmt)
1326 {
1327         struct snd_soc_codec *codec = codec_dai->codec;
1328         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1329         u8 aictrl_a, aictrl_b;
1330 
1331         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1332         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1333         /* set master/slave audio interface */
1334         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1335         case SND_SOC_DAIFMT_CBM_CFM:
1336                 /* Codec Master */
1337                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1338                 break;
1339         case SND_SOC_DAIFMT_CBS_CFS:
1340                 /* Codec Slave */
1341                 if (dac33->fifo_mode) {
1342                         dev_err(codec->dev, "FIFO mode requires master mode\n");
1343                         return -EINVAL;
1344                 } else
1345                         aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1346                 break;
1347         default:
1348                 return -EINVAL;
1349         }
1350 
1351         aictrl_a &= ~DAC33_AFMT_MASK;
1352         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1353         case SND_SOC_DAIFMT_I2S:
1354                 aictrl_a |= DAC33_AFMT_I2S;
1355                 break;
1356         case SND_SOC_DAIFMT_DSP_A:
1357                 aictrl_a |= DAC33_AFMT_DSP;
1358                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1359                 aictrl_b |= DAC33_DATA_DELAY(0);
1360                 break;
1361         case SND_SOC_DAIFMT_RIGHT_J:
1362                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1363                 break;
1364         case SND_SOC_DAIFMT_LEFT_J:
1365                 aictrl_a |= DAC33_AFMT_LEFT_J;
1366                 break;
1367         default:
1368                 dev_err(codec->dev, "Unsupported format (%u)\n",
1369                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1370                 return -EINVAL;
1371         }
1372 
1373         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1374         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1375 
1376         return 0;
1377 }
1378 
1379 static int dac33_soc_probe(struct snd_soc_codec *codec)
1380 {
1381         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1382         int ret = 0;
1383 
1384         codec->control_data = dac33->control_data;
1385         codec->hw_write = (hw_write_t) i2c_master_send;
1386         dac33->codec = codec;
1387 
1388         /* Read the tlv320dac33 ID registers */
1389         ret = dac33_hard_power(codec, 1);
1390         if (ret != 0) {
1391                 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1392                 goto err_power;
1393         }
1394         ret = dac33_read_id(codec);
1395         dac33_hard_power(codec, 0);
1396 
1397         if (ret < 0) {
1398                 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1399                 ret = -ENODEV;
1400                 goto err_power;
1401         }
1402 
1403         /* Check if the IRQ number is valid and request it */
1404         if (dac33->irq >= 0) {
1405                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1406                                   IRQF_TRIGGER_RISING,
1407                                   codec->name, codec);
1408                 if (ret < 0) {
1409                         dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1410                                                 dac33->irq, ret);
1411                         dac33->irq = -1;
1412                 }
1413                 if (dac33->irq != -1) {
1414                         /* Setup work queue */
1415                         dac33->dac33_wq =
1416                                 create_singlethread_workqueue("tlv320dac33");
1417                         if (dac33->dac33_wq == NULL) {
1418                                 free_irq(dac33->irq, codec);
1419                                 return -ENOMEM;
1420                         }
1421 
1422                         INIT_WORK(&dac33->work, dac33_work);
1423                 }
1424         }
1425 
1426         /* Only add the FIFO controls, if we have valid IRQ number */
1427         if (dac33->irq >= 0)
1428                 snd_soc_add_codec_controls(codec, dac33_mode_snd_controls,
1429                                      ARRAY_SIZE(dac33_mode_snd_controls));
1430 
1431 err_power:
1432         return ret;
1433 }
1434 
1435 static int dac33_soc_remove(struct snd_soc_codec *codec)
1436 {
1437         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1438 
1439         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1440 
1441         if (dac33->irq >= 0) {
1442                 free_irq(dac33->irq, dac33->codec);
1443                 destroy_workqueue(dac33->dac33_wq);
1444         }
1445         return 0;
1446 }
1447 
1448 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1449         .read = dac33_read_reg_cache,
1450         .write = dac33_write_locked,
1451         .set_bias_level = dac33_set_bias_level,
1452         .idle_bias_off = true,
1453         .reg_cache_size = ARRAY_SIZE(dac33_reg),
1454         .reg_word_size = sizeof(u8),
1455         .reg_cache_default = dac33_reg,
1456         .probe = dac33_soc_probe,
1457         .remove = dac33_soc_remove,
1458 
1459         .controls = dac33_snd_controls,
1460         .num_controls = ARRAY_SIZE(dac33_snd_controls),
1461         .dapm_widgets = dac33_dapm_widgets,
1462         .num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets),
1463         .dapm_routes = audio_map,
1464         .num_dapm_routes = ARRAY_SIZE(audio_map),
1465 };
1466 
1467 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1468                          SNDRV_PCM_RATE_48000)
1469 #define DAC33_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1470 
1471 static const struct snd_soc_dai_ops dac33_dai_ops = {
1472         .startup        = dac33_startup,
1473         .shutdown       = dac33_shutdown,
1474         .hw_params      = dac33_hw_params,
1475         .trigger        = dac33_pcm_trigger,
1476         .delay          = dac33_dai_delay,
1477         .set_sysclk     = dac33_set_dai_sysclk,
1478         .set_fmt        = dac33_set_dai_fmt,
1479 };
1480 
1481 static struct snd_soc_dai_driver dac33_dai = {
1482         .name = "tlv320dac33-hifi",
1483         .playback = {
1484                 .stream_name = "Playback",
1485                 .channels_min = 2,
1486                 .channels_max = 2,
1487                 .rates = DAC33_RATES,
1488                 .formats = DAC33_FORMATS,
1489                 .sig_bits = 24,
1490         },
1491         .ops = &dac33_dai_ops,
1492 };
1493 
1494 static int dac33_i2c_probe(struct i2c_client *client,
1495                            const struct i2c_device_id *id)
1496 {
1497         struct tlv320dac33_platform_data *pdata;
1498         struct tlv320dac33_priv *dac33;
1499         int ret, i;
1500 
1501         if (client->dev.platform_data == NULL) {
1502                 dev_err(&client->dev, "Platform data not set\n");
1503                 return -ENODEV;
1504         }
1505         pdata = client->dev.platform_data;
1506 
1507         dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
1508                              GFP_KERNEL);
1509         if (dac33 == NULL)
1510                 return -ENOMEM;
1511 
1512         dac33->control_data = client;
1513         mutex_init(&dac33->mutex);
1514         spin_lock_init(&dac33->lock);
1515 
1516         i2c_set_clientdata(client, dac33);
1517 
1518         dac33->power_gpio = pdata->power_gpio;
1519         dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1520         dac33->keep_bclk = pdata->keep_bclk;
1521         dac33->mode1_latency = pdata->mode1_latency;
1522         if (!dac33->mode1_latency)
1523                 dac33->mode1_latency = 10000; /* 10ms */
1524         dac33->irq = client->irq;
1525         /* Disable FIFO use by default */
1526         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1527 
1528         /* Check if the reset GPIO number is valid and request it */
1529         if (dac33->power_gpio >= 0) {
1530                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1531                 if (ret < 0) {
1532                         dev_err(&client->dev,
1533                                 "Failed to request reset GPIO (%d)\n",
1534                                 dac33->power_gpio);
1535                         goto err_gpio;
1536                 }
1537                 gpio_direction_output(dac33->power_gpio, 0);
1538         }
1539 
1540         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1541                 dac33->supplies[i].supply = dac33_supply_names[i];
1542 
1543         ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1544                                  dac33->supplies);
1545 
1546         if (ret != 0) {
1547                 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1548                 goto err_get;
1549         }
1550 
1551         ret = snd_soc_register_codec(&client->dev,
1552                         &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1553         if (ret < 0)
1554                 goto err_get;
1555 
1556         return ret;
1557 err_get:
1558         if (dac33->power_gpio >= 0)
1559                 gpio_free(dac33->power_gpio);
1560 err_gpio:
1561         return ret;
1562 }
1563 
1564 static int dac33_i2c_remove(struct i2c_client *client)
1565 {
1566         struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1567 
1568         if (unlikely(dac33->chip_power))
1569                 dac33_hard_power(dac33->codec, 0);
1570 
1571         if (dac33->power_gpio >= 0)
1572                 gpio_free(dac33->power_gpio);
1573 
1574         snd_soc_unregister_codec(&client->dev);
1575         return 0;
1576 }
1577 
1578 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1579         {
1580                 .name = "tlv320dac33",
1581                 .driver_data = 0,
1582         },
1583         { },
1584 };
1585 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1586 
1587 static struct i2c_driver tlv320dac33_i2c_driver = {
1588         .driver = {
1589                 .name = "tlv320dac33-codec",
1590                 .owner = THIS_MODULE,
1591         },
1592         .probe          = dac33_i2c_probe,
1593         .remove         = dac33_i2c_remove,
1594         .id_table       = tlv320dac33_i2c_id,
1595 };
1596 
1597 module_i2c_driver(tlv320dac33_i2c_driver);
1598 
1599 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1600 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1601 MODULE_LICENSE("GPL");
1602 

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