c5ab8c8057714871e13ad249805f60877ff32f5d
[linux-2.6.git] / sound / soc / codecs / tlv320dac33.c
1 /*
2  * ALSA SoC Texas Instruments TLV320DAC33 codec driver
3  *
4  * Author:      Peter Ujfalusi <peter.ujfalusi@nokia.com>
5  *
6  * Copyright:   (C) 2009 Nokia Corporation
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/pm.h>
29 #include <linux/i2c.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/gpio.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/slab.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dapm.h>
40 #include <sound/initval.h>
41 #include <sound/tlv.h>
42
43 #include <sound/tlv320dac33-plat.h>
44 #include "tlv320dac33.h"
45
46 #define DAC33_BUFFER_SIZE_BYTES         24576   /* bytes, 12288 16 bit words,
47                                                  * 6144 stereo */
48 #define DAC33_BUFFER_SIZE_SAMPLES       6144
49
50 #define NSAMPLE_MAX             5700
51
52 #define MODE7_LTHR              10
53 #define MODE7_UTHR              (DAC33_BUFFER_SIZE_SAMPLES - 10)
54
55 #define BURST_BASEFREQ_HZ       49152000
56
57 #define SAMPLES_TO_US(rate, samples) \
58         (1000000000 / ((rate * 1000) / samples))
59
60 #define US_TO_SAMPLES(rate, us) \
61         (rate / (1000000 / (us < 1000000 ? us : 1000000)))
62
63 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
64         ((samples * 5000) / ((burstrate * 5000) / (burstrate - playrate)))
65
66 static void dac33_calculate_times(struct snd_pcm_substream *substream);
67 static int dac33_prepare_chip(struct snd_pcm_substream *substream);
68
69 enum dac33_state {
70         DAC33_IDLE = 0,
71         DAC33_PREFILL,
72         DAC33_PLAYBACK,
73         DAC33_FLUSH,
74 };
75
76 enum dac33_fifo_modes {
77         DAC33_FIFO_BYPASS = 0,
78         DAC33_FIFO_MODE1,
79         DAC33_FIFO_MODE7,
80         DAC33_FIFO_LAST_MODE,
81 };
82
83 #define DAC33_NUM_SUPPLIES 3
84 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
85         "AVDD",
86         "DVDD",
87         "IOVDD",
88 };
89
90 struct tlv320dac33_priv {
91         struct mutex mutex;
92         struct workqueue_struct *dac33_wq;
93         struct work_struct work;
94         struct snd_soc_codec *codec;
95         struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
96         struct snd_pcm_substream *substream;
97         int power_gpio;
98         int chip_power;
99         int irq;
100         unsigned int refclk;
101
102         unsigned int alarm_threshold;   /* set to be half of LATENCY_TIME_MS */
103         unsigned int nsample_min;       /* nsample should not be lower than
104                                          * this */
105         unsigned int nsample_max;       /* nsample should not be higher than
106                                          * this */
107         enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
108         unsigned int nsample;           /* burst read amount from host */
109         int mode1_latency;              /* latency caused by the i2c writes in
110                                          * us */
111         int auto_fifo_config;           /* Configure the FIFO based on the
112                                          * period size */
113         u8 burst_bclkdiv;               /* BCLK divider value in burst mode */
114         unsigned int burst_rate;        /* Interface speed in Burst modes */
115
116         int keep_bclk;                  /* Keep the BCLK continuously running
117                                          * in FIFO modes */
118         spinlock_t lock;
119         unsigned long long t_stamp1;    /* Time stamp for FIFO modes to */
120         unsigned long long t_stamp2;    /* calculate the FIFO caused delay */
121
122         unsigned int mode1_us_burst;    /* Time to burst read n number of
123                                          * samples */
124         unsigned int mode7_us_to_lthr;  /* Time to reach lthr from uthr */
125
126         unsigned int uthr;
127
128         enum dac33_state state;
129         enum snd_soc_control_type control_type;
130         void *control_data;
131 };
132
133 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
134 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
135 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
136 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
137 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
138 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
139 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
140 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
141 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
142 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
143 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
144 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
145 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
146 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
147 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
148 0x00, 0x00,             /* 0x38 - 0x39 */
149 /* Registers 0x3a - 0x3f are reserved  */
150             0x00, 0x00, /* 0x3a - 0x3b */
151 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
152
153 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
154 0x00, 0x80,             /* 0x44 - 0x45 */
155 /* Registers 0x46 - 0x47 are reserved  */
156             0x80, 0x80, /* 0x46 - 0x47 */
157
158 0x80, 0x00, 0x00,       /* 0x48 - 0x4a */
159 /* Registers 0x4b - 0x7c are reserved  */
160                   0x00, /* 0x4b        */
161 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
162 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
163 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
164 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
165 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
166 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
167 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
168 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
169 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
170 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
171 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
172 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
173 0x00,                   /* 0x7c        */
174
175       0xda, 0x33, 0x03, /* 0x7d - 0x7f */
176 };
177
178 /* Register read and write */
179 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
180                                                 unsigned reg)
181 {
182         u8 *cache = codec->reg_cache;
183         if (reg >= DAC33_CACHEREGNUM)
184                 return 0;
185
186         return cache[reg];
187 }
188
189 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
190                                          u8 reg, u8 value)
191 {
192         u8 *cache = codec->reg_cache;
193         if (reg >= DAC33_CACHEREGNUM)
194                 return;
195
196         cache[reg] = value;
197 }
198
199 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
200                       u8 *value)
201 {
202         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
203         int val, ret = 0;
204
205         *value = reg & 0xff;
206
207         /* If powered off, return the cached value */
208         if (dac33->chip_power) {
209                 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
210                 if (val < 0) {
211                         dev_err(codec->dev, "Read failed (%d)\n", val);
212                         value[0] = dac33_read_reg_cache(codec, reg);
213                         ret = val;
214                 } else {
215                         value[0] = val;
216                         dac33_write_reg_cache(codec, reg, val);
217                 }
218         } else {
219                 value[0] = dac33_read_reg_cache(codec, reg);
220         }
221
222         return ret;
223 }
224
225 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
226                        unsigned int value)
227 {
228         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
229         u8 data[2];
230         int ret = 0;
231
232         /*
233          * data is
234          *   D15..D8 dac33 register offset
235          *   D7...D0 register data
236          */
237         data[0] = reg & 0xff;
238         data[1] = value & 0xff;
239
240         dac33_write_reg_cache(codec, data[0], data[1]);
241         if (dac33->chip_power) {
242                 ret = codec->hw_write(codec->control_data, data, 2);
243                 if (ret != 2)
244                         dev_err(codec->dev, "Write failed (%d)\n", ret);
245                 else
246                         ret = 0;
247         }
248
249         return ret;
250 }
251
252 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
253                        unsigned int value)
254 {
255         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
256         int ret;
257
258         mutex_lock(&dac33->mutex);
259         ret = dac33_write(codec, reg, value);
260         mutex_unlock(&dac33->mutex);
261
262         return ret;
263 }
264
265 #define DAC33_I2C_ADDR_AUTOINC  0x80
266 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
267                        unsigned int value)
268 {
269         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
270         u8 data[3];
271         int ret = 0;
272
273         /*
274          * data is
275          *   D23..D16 dac33 register offset
276          *   D15..D8  register data MSB
277          *   D7...D0  register data LSB
278          */
279         data[0] = reg & 0xff;
280         data[1] = (value >> 8) & 0xff;
281         data[2] = value & 0xff;
282
283         dac33_write_reg_cache(codec, data[0], data[1]);
284         dac33_write_reg_cache(codec, data[0] + 1, data[2]);
285
286         if (dac33->chip_power) {
287                 /* We need to set autoincrement mode for 16 bit writes */
288                 data[0] |= DAC33_I2C_ADDR_AUTOINC;
289                 ret = codec->hw_write(codec->control_data, data, 3);
290                 if (ret != 3)
291                         dev_err(codec->dev, "Write failed (%d)\n", ret);
292                 else
293                         ret = 0;
294         }
295
296         return ret;
297 }
298
299 static void dac33_init_chip(struct snd_soc_codec *codec)
300 {
301         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
302
303         if (unlikely(!dac33->chip_power))
304                 return;
305
306         /* 44-46: DAC Control Registers */
307         /* A : DAC sample rate Fsref/1.5 */
308         dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
309         /* B : DAC src=normal, not muted */
310         dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
311                                              DAC33_DACSRCL_LEFT);
312         /* C : (defaults) */
313         dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
314
315         /* 73 : volume soft stepping control,
316          clock source = internal osc (?) */
317         dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
318
319         dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
320
321         /* Restore only selected registers (gains mostly) */
322         dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
323                     dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
324         dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
325                     dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
326
327         dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
328                     dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
329         dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
330                     dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
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 int dac33_hard_power(struct snd_soc_codec *codec, int power)
361 {
362         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
363         int ret = 0;
364
365         mutex_lock(&dac33->mutex);
366
367         /* Safety check */
368         if (unlikely(power == dac33->chip_power)) {
369                 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
370                         power ? "ON" : "OFF");
371                 goto exit;
372         }
373
374         if (power) {
375                 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
376                                           dac33->supplies);
377                 if (ret != 0) {
378                         dev_err(codec->dev,
379                                 "Failed to enable supplies: %d\n", ret);
380                                 goto exit;
381                 }
382
383                 if (dac33->power_gpio >= 0)
384                         gpio_set_value(dac33->power_gpio, 1);
385
386                 dac33->chip_power = 1;
387         } else {
388                 dac33_soft_power(codec, 0);
389                 if (dac33->power_gpio >= 0)
390                         gpio_set_value(dac33->power_gpio, 0);
391
392                 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
393                                              dac33->supplies);
394                 if (ret != 0) {
395                         dev_err(codec->dev,
396                                 "Failed to disable supplies: %d\n", ret);
397                         goto exit;
398                 }
399
400                 dac33->chip_power = 0;
401         }
402
403 exit:
404         mutex_unlock(&dac33->mutex);
405         return ret;
406 }
407
408 static int playback_event(struct snd_soc_dapm_widget *w,
409                 struct snd_kcontrol *kcontrol, int event)
410 {
411         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec);
412
413         switch (event) {
414         case SND_SOC_DAPM_PRE_PMU:
415                 if (likely(dac33->substream)) {
416                         dac33_calculate_times(dac33->substream);
417                         dac33_prepare_chip(dac33->substream);
418                 }
419                 break;
420         }
421         return 0;
422 }
423
424 static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
425                          struct snd_ctl_elem_value *ucontrol)
426 {
427         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
428         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
429
430         ucontrol->value.integer.value[0] = dac33->nsample;
431
432         return 0;
433 }
434
435 static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
436                          struct snd_ctl_elem_value *ucontrol)
437 {
438         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
439         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
440         int ret = 0;
441
442         if (dac33->nsample == ucontrol->value.integer.value[0])
443                 return 0;
444
445         if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
446             ucontrol->value.integer.value[0] > dac33->nsample_max) {
447                 ret = -EINVAL;
448         } else {
449                 dac33->nsample = ucontrol->value.integer.value[0];
450                 /* Re calculate the burst time */
451                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
452                                                       dac33->nsample);
453         }
454
455         return ret;
456 }
457
458 static int dac33_get_uthr(struct snd_kcontrol *kcontrol,
459                          struct snd_ctl_elem_value *ucontrol)
460 {
461         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
462         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
463
464         ucontrol->value.integer.value[0] = dac33->uthr;
465
466         return 0;
467 }
468
469 static int dac33_set_uthr(struct snd_kcontrol *kcontrol,
470                          struct snd_ctl_elem_value *ucontrol)
471 {
472         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
473         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
474         int ret = 0;
475
476         if (dac33->substream)
477                 return -EBUSY;
478
479         if (dac33->uthr == ucontrol->value.integer.value[0])
480                 return 0;
481
482         if (ucontrol->value.integer.value[0] < (MODE7_LTHR + 10) ||
483             ucontrol->value.integer.value[0] > MODE7_UTHR)
484                 ret = -EINVAL;
485         else
486                 dac33->uthr = ucontrol->value.integer.value[0];
487
488         return ret;
489 }
490
491 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
492                          struct snd_ctl_elem_value *ucontrol)
493 {
494         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
495         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
496
497         ucontrol->value.integer.value[0] = dac33->fifo_mode;
498
499         return 0;
500 }
501
502 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
503                          struct snd_ctl_elem_value *ucontrol)
504 {
505         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
506         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
507         int ret = 0;
508
509         if (dac33->fifo_mode == ucontrol->value.integer.value[0])
510                 return 0;
511         /* Do not allow changes while stream is running*/
512         if (codec->active)
513                 return -EPERM;
514
515         if (ucontrol->value.integer.value[0] < 0 ||
516             ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
517                 ret = -EINVAL;
518         else
519                 dac33->fifo_mode = ucontrol->value.integer.value[0];
520
521         return ret;
522 }
523
524 /* Codec operation modes */
525 static const char *dac33_fifo_mode_texts[] = {
526         "Bypass", "Mode 1", "Mode 7"
527 };
528
529 static const struct soc_enum dac33_fifo_mode_enum =
530         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
531                             dac33_fifo_mode_texts);
532
533 /* L/R Line Output Gain */
534 static const char *lr_lineout_gain_texts[] = {
535         "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
536         "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
537 };
538
539 static const struct soc_enum l_lineout_gain_enum =
540         SOC_ENUM_SINGLE(DAC33_LDAC_PWR_CTRL, 0,
541                         ARRAY_SIZE(lr_lineout_gain_texts),
542                         lr_lineout_gain_texts);
543
544 static const struct soc_enum r_lineout_gain_enum =
545         SOC_ENUM_SINGLE(DAC33_RDAC_PWR_CTRL, 0,
546                         ARRAY_SIZE(lr_lineout_gain_texts),
547                         lr_lineout_gain_texts);
548
549 /*
550  * DACL/R digital volume control:
551  * from 0 dB to -63.5 in 0.5 dB steps
552  * Need to be inverted later on:
553  * 0x00 == 0 dB
554  * 0x7f == -63.5 dB
555  */
556 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
557
558 static const struct snd_kcontrol_new dac33_snd_controls[] = {
559         SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
560                 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
561                 0, 0x7f, 1, dac_digivol_tlv),
562         SOC_DOUBLE_R("DAC Digital Playback Switch",
563                  DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
564         SOC_DOUBLE_R("Line to Line Out Volume",
565                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
566         SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
567         SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
568 };
569
570 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
571         SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
572                  dac33_get_fifo_mode, dac33_set_fifo_mode),
573 };
574
575 static const struct snd_kcontrol_new dac33_fifo_snd_controls[] = {
576         SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
577                 dac33_get_nsample, dac33_set_nsample),
578         SOC_SINGLE_EXT("UTHR", 0, 0, MODE7_UTHR, 0,
579                  dac33_get_uthr, dac33_set_uthr),
580 };
581
582 /* Analog bypass */
583 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
584         SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
585
586 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
587         SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
588
589 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
590         SND_SOC_DAPM_OUTPUT("LEFT_LO"),
591         SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
592
593         SND_SOC_DAPM_INPUT("LINEL"),
594         SND_SOC_DAPM_INPUT("LINER"),
595
596         SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
597         SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
598
599         /* Analog bypass */
600         SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
601                                 &dac33_dapm_abypassl_control),
602         SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
603                                 &dac33_dapm_abypassr_control),
604
605         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
606                          DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
607         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
608                          DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
609
610         SND_SOC_DAPM_PRE("Prepare Playback", playback_event),
611 };
612
613 static const struct snd_soc_dapm_route audio_map[] = {
614         /* Analog bypass */
615         {"Analog Left Bypass", "Switch", "LINEL"},
616         {"Analog Right Bypass", "Switch", "LINER"},
617
618         {"Output Left Amp Power", NULL, "DACL"},
619         {"Output Right Amp Power", NULL, "DACR"},
620
621         {"Output Left Amp Power", NULL, "Analog Left Bypass"},
622         {"Output Right Amp Power", NULL, "Analog Right Bypass"},
623
624         /* output */
625         {"LEFT_LO", NULL, "Output Left Amp Power"},
626         {"RIGHT_LO", NULL, "Output Right Amp Power"},
627 };
628
629 static int dac33_add_widgets(struct snd_soc_codec *codec)
630 {
631         snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
632                                   ARRAY_SIZE(dac33_dapm_widgets));
633
634         /* set up audio path interconnects */
635         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
636
637         return 0;
638 }
639
640 static int dac33_set_bias_level(struct snd_soc_codec *codec,
641                                 enum snd_soc_bias_level level)
642 {
643         int ret;
644
645         switch (level) {
646         case SND_SOC_BIAS_ON:
647                 dac33_soft_power(codec, 1);
648                 break;
649         case SND_SOC_BIAS_PREPARE:
650                 break;
651         case SND_SOC_BIAS_STANDBY:
652                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
653                         /* Coming from OFF, switch on the codec */
654                         ret = dac33_hard_power(codec, 1);
655                         if (ret != 0)
656                                 return ret;
657
658                         dac33_init_chip(codec);
659                 }
660                 break;
661         case SND_SOC_BIAS_OFF:
662                 /* Do not power off, when the codec is already off */
663                 if (codec->bias_level == SND_SOC_BIAS_OFF)
664                         return 0;
665                 ret = dac33_hard_power(codec, 0);
666                 if (ret != 0)
667                         return ret;
668                 break;
669         }
670         codec->bias_level = level;
671
672         return 0;
673 }
674
675 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
676 {
677         struct snd_soc_codec *codec = dac33->codec;
678         unsigned int delay;
679
680         switch (dac33->fifo_mode) {
681         case DAC33_FIFO_MODE1:
682                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
683                         DAC33_THRREG(dac33->nsample));
684
685                 /* Take the timestamps */
686                 spin_lock_irq(&dac33->lock);
687                 dac33->t_stamp2 = ktime_to_us(ktime_get());
688                 dac33->t_stamp1 = dac33->t_stamp2;
689                 spin_unlock_irq(&dac33->lock);
690
691                 dac33_write16(codec, DAC33_PREFILL_MSB,
692                                 DAC33_THRREG(dac33->alarm_threshold));
693                 /* Enable Alarm Threshold IRQ with a delay */
694                 delay = SAMPLES_TO_US(dac33->burst_rate,
695                                      dac33->alarm_threshold) + 1000;
696                 usleep_range(delay, delay + 500);
697                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
698                 break;
699         case DAC33_FIFO_MODE7:
700                 /* Take the timestamp */
701                 spin_lock_irq(&dac33->lock);
702                 dac33->t_stamp1 = ktime_to_us(ktime_get());
703                 /* Move back the timestamp with drain time */
704                 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
705                 spin_unlock_irq(&dac33->lock);
706
707                 dac33_write16(codec, DAC33_PREFILL_MSB,
708                                 DAC33_THRREG(MODE7_LTHR));
709
710                 /* Enable Upper Threshold IRQ */
711                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
712                 break;
713         default:
714                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
715                                                         dac33->fifo_mode);
716                 break;
717         }
718 }
719
720 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
721 {
722         struct snd_soc_codec *codec = dac33->codec;
723
724         switch (dac33->fifo_mode) {
725         case DAC33_FIFO_MODE1:
726                 /* Take the timestamp */
727                 spin_lock_irq(&dac33->lock);
728                 dac33->t_stamp2 = ktime_to_us(ktime_get());
729                 spin_unlock_irq(&dac33->lock);
730
731                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
732                                 DAC33_THRREG(dac33->nsample));
733                 break;
734         case DAC33_FIFO_MODE7:
735                 /* At the moment we are not using interrupts in mode7 */
736                 break;
737         default:
738                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
739                                                         dac33->fifo_mode);
740                 break;
741         }
742 }
743
744 static void dac33_work(struct work_struct *work)
745 {
746         struct snd_soc_codec *codec;
747         struct tlv320dac33_priv *dac33;
748         u8 reg;
749
750         dac33 = container_of(work, struct tlv320dac33_priv, work);
751         codec = dac33->codec;
752
753         mutex_lock(&dac33->mutex);
754         switch (dac33->state) {
755         case DAC33_PREFILL:
756                 dac33->state = DAC33_PLAYBACK;
757                 dac33_prefill_handler(dac33);
758                 break;
759         case DAC33_PLAYBACK:
760                 dac33_playback_handler(dac33);
761                 break;
762         case DAC33_IDLE:
763                 break;
764         case DAC33_FLUSH:
765                 dac33->state = DAC33_IDLE;
766                 /* Mask all interrupts from dac33 */
767                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
768
769                 /* flush fifo */
770                 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
771                 reg |= DAC33_FIFOFLUSH;
772                 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
773                 break;
774         }
775         mutex_unlock(&dac33->mutex);
776 }
777
778 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
779 {
780         struct snd_soc_codec *codec = dev;
781         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
782
783         spin_lock(&dac33->lock);
784         dac33->t_stamp1 = ktime_to_us(ktime_get());
785         spin_unlock(&dac33->lock);
786
787         /* Do not schedule the workqueue in Mode7 */
788         if (dac33->fifo_mode != DAC33_FIFO_MODE7)
789                 queue_work(dac33->dac33_wq, &dac33->work);
790
791         return IRQ_HANDLED;
792 }
793
794 static void dac33_oscwait(struct snd_soc_codec *codec)
795 {
796         int timeout = 60;
797         u8 reg;
798
799         do {
800                 usleep_range(1000, 2000);
801                 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
802         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
803         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
804                 dev_err(codec->dev,
805                         "internal oscillator calibration failed\n");
806 }
807
808 static int dac33_startup(struct snd_pcm_substream *substream,
809                            struct snd_soc_dai *dai)
810 {
811         struct snd_soc_pcm_runtime *rtd = substream->private_data;
812         struct snd_soc_codec *codec = rtd->codec;
813         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
814
815         /* Stream started, save the substream pointer */
816         dac33->substream = substream;
817
818         return 0;
819 }
820
821 static void dac33_shutdown(struct snd_pcm_substream *substream,
822                              struct snd_soc_dai *dai)
823 {
824         struct snd_soc_pcm_runtime *rtd = substream->private_data;
825         struct snd_soc_codec *codec = rtd->codec;
826         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
827
828         dac33->substream = NULL;
829
830         /* Reset the nSample restrictions */
831         dac33->nsample_min = 0;
832         dac33->nsample_max = NSAMPLE_MAX;
833 }
834
835 static int dac33_hw_params(struct snd_pcm_substream *substream,
836                            struct snd_pcm_hw_params *params,
837                            struct snd_soc_dai *dai)
838 {
839         struct snd_soc_pcm_runtime *rtd = substream->private_data;
840         struct snd_soc_codec *codec = rtd->codec;
841
842         /* Check parameters for validity */
843         switch (params_rate(params)) {
844         case 44100:
845         case 48000:
846                 break;
847         default:
848                 dev_err(codec->dev, "unsupported rate %d\n",
849                         params_rate(params));
850                 return -EINVAL;
851         }
852
853         switch (params_format(params)) {
854         case SNDRV_PCM_FORMAT_S16_LE:
855                 break;
856         default:
857                 dev_err(codec->dev, "unsupported format %d\n",
858                         params_format(params));
859                 return -EINVAL;
860         }
861
862         return 0;
863 }
864
865 #define CALC_OSCSET(rate, refclk) ( \
866         ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
867 #define CALC_RATIOSET(rate, refclk) ( \
868         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
869
870 /*
871  * tlv320dac33 is strict on the sequence of the register writes, if the register
872  * writes happens in different order, than dac33 might end up in unknown state.
873  * Use the known, working sequence of register writes to initialize the dac33.
874  */
875 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
876 {
877         struct snd_soc_pcm_runtime *rtd = substream->private_data;
878         struct snd_soc_codec *codec = rtd->codec;
879         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
880         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
881         u8 aictrl_a, aictrl_b, fifoctrl_a;
882
883         switch (substream->runtime->rate) {
884         case 44100:
885         case 48000:
886                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
887                 ratioset = CALC_RATIOSET(substream->runtime->rate,
888                                          dac33->refclk);
889                 break;
890         default:
891                 dev_err(codec->dev, "unsupported rate %d\n",
892                         substream->runtime->rate);
893                 return -EINVAL;
894         }
895
896
897         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
898         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
899         /* Read FIFO control A, and clear FIFO flush bit */
900         fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
901         fifoctrl_a &= ~DAC33_FIFOFLUSH;
902
903         fifoctrl_a &= ~DAC33_WIDTH;
904         switch (substream->runtime->format) {
905         case SNDRV_PCM_FORMAT_S16_LE:
906                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
907                 fifoctrl_a |= DAC33_WIDTH;
908                 break;
909         default:
910                 dev_err(codec->dev, "unsupported format %d\n",
911                         substream->runtime->format);
912                 return -EINVAL;
913         }
914
915         mutex_lock(&dac33->mutex);
916
917         if (!dac33->chip_power) {
918                 /*
919                  * Chip is not powered yet.
920                  * Do the init in the dac33_set_bias_level later.
921                  */
922                 mutex_unlock(&dac33->mutex);
923                 return 0;
924         }
925
926         dac33_soft_power(codec, 0);
927         dac33_soft_power(codec, 1);
928
929         reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
930         dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
931
932         /* Write registers 0x08 and 0x09 (MSB, LSB) */
933         dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
934
935         /* calib time: 128 is a nice number ;) */
936         dac33_write(codec, DAC33_CALIB_TIME, 128);
937
938         /* adjustment treshold & step */
939         dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
940                                                  DAC33_ADJSTEP(1));
941
942         /* div=4 / gain=1 / div */
943         dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
944
945         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
946         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
947         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
948
949         dac33_oscwait(codec);
950
951         if (dac33->fifo_mode) {
952                 /* Generic for all FIFO modes */
953                 /* 50-51 : ASRC Control registers */
954                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
955                 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
956
957                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
958                 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
959
960                 /* Set interrupts to high active */
961                 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
962         } else {
963                 /* FIFO bypass mode */
964                 /* 50-51 : ASRC Control registers */
965                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
966                 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
967         }
968
969         /* Interrupt behaviour configuration */
970         switch (dac33->fifo_mode) {
971         case DAC33_FIFO_MODE1:
972                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
973                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
974                 break;
975         case DAC33_FIFO_MODE7:
976                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
977                         DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
978                 break;
979         default:
980                 /* in FIFO bypass mode, the interrupts are not used */
981                 break;
982         }
983
984         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
985
986         switch (dac33->fifo_mode) {
987         case DAC33_FIFO_MODE1:
988                 /*
989                  * For mode1:
990                  * Disable the FIFO bypass (Enable the use of FIFO)
991                  * Select nSample mode
992                  * BCLK is only running when data is needed by DAC33
993                  */
994                 fifoctrl_a &= ~DAC33_FBYPAS;
995                 fifoctrl_a &= ~DAC33_FAUTO;
996                 if (dac33->keep_bclk)
997                         aictrl_b |= DAC33_BCLKON;
998                 else
999                         aictrl_b &= ~DAC33_BCLKON;
1000                 break;
1001         case DAC33_FIFO_MODE7:
1002                 /*
1003                  * For mode1:
1004                  * Disable the FIFO bypass (Enable the use of FIFO)
1005                  * Select Threshold mode
1006                  * BCLK is only running when data is needed by DAC33
1007                  */
1008                 fifoctrl_a &= ~DAC33_FBYPAS;
1009                 fifoctrl_a |= DAC33_FAUTO;
1010                 if (dac33->keep_bclk)
1011                         aictrl_b |= DAC33_BCLKON;
1012                 else
1013                         aictrl_b &= ~DAC33_BCLKON;
1014                 break;
1015         default:
1016                 /*
1017                  * For FIFO bypass mode:
1018                  * Enable the FIFO bypass (Disable the FIFO use)
1019                  * Set the BCLK as continous
1020                  */
1021                 fifoctrl_a |= DAC33_FBYPAS;
1022                 aictrl_b |= DAC33_BCLKON;
1023                 break;
1024         }
1025
1026         dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1027         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1028         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1029
1030         /*
1031          * BCLK divide ratio
1032          * 0: 1.5
1033          * 1: 1
1034          * 2: 2
1035          * ...
1036          * 254: 254
1037          * 255: 255
1038          */
1039         if (dac33->fifo_mode)
1040                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1041                                                         dac33->burst_bclkdiv);
1042         else
1043                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1044
1045         switch (dac33->fifo_mode) {
1046         case DAC33_FIFO_MODE1:
1047                 dac33_write16(codec, DAC33_ATHR_MSB,
1048                               DAC33_THRREG(dac33->alarm_threshold));
1049                 break;
1050         case DAC33_FIFO_MODE7:
1051                 /*
1052                  * Configure the threshold levels, and leave 10 sample space
1053                  * at the bottom, and also at the top of the FIFO
1054                  */
1055                 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1056                 dac33_write16(codec, DAC33_LTHR_MSB, DAC33_THRREG(MODE7_LTHR));
1057                 break;
1058         default:
1059                 break;
1060         }
1061
1062         mutex_unlock(&dac33->mutex);
1063
1064         return 0;
1065 }
1066
1067 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1068 {
1069         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1070         struct snd_soc_codec *codec = rtd->codec;
1071         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1072         unsigned int period_size = substream->runtime->period_size;
1073         unsigned int rate = substream->runtime->rate;
1074         unsigned int nsample_limit;
1075
1076         /* In bypass mode we don't need to calculate */
1077         if (!dac33->fifo_mode)
1078                 return;
1079
1080         switch (dac33->fifo_mode) {
1081         case DAC33_FIFO_MODE1:
1082                 /* Number of samples under i2c latency */
1083                 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1084                                                 dac33->mode1_latency);
1085                 nsample_limit = DAC33_BUFFER_SIZE_SAMPLES -
1086                                 dac33->alarm_threshold;
1087
1088                 if (dac33->auto_fifo_config) {
1089                         if (period_size <= dac33->alarm_threshold)
1090                                 /*
1091                                  * Configure nSamaple to number of periods,
1092                                  * which covers the latency requironment.
1093                                  */
1094                                 dac33->nsample = period_size *
1095                                        ((dac33->alarm_threshold / period_size) +
1096                                        (dac33->alarm_threshold % period_size ?
1097                                        1 : 0));
1098                         else if (period_size > nsample_limit)
1099                                 dac33->nsample = nsample_limit;
1100                         else
1101                                 dac33->nsample = period_size;
1102                 } else {
1103                         /* nSample time shall not be shorter than i2c latency */
1104                         dac33->nsample_min = dac33->alarm_threshold;
1105                         /*
1106                          * nSample should not be bigger than alsa buffer minus
1107                          * size of one period to avoid overruns
1108                          */
1109                         dac33->nsample_max = substream->runtime->buffer_size -
1110                                                 period_size;
1111
1112                         if (dac33->nsample_max > nsample_limit)
1113                                 dac33->nsample_max = nsample_limit;
1114
1115                         /* Correct the nSample if it is outside of the ranges */
1116                         if (dac33->nsample < dac33->nsample_min)
1117                                 dac33->nsample = dac33->nsample_min;
1118                         if (dac33->nsample > dac33->nsample_max)
1119                                 dac33->nsample = dac33->nsample_max;
1120                 }
1121
1122                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1123                                                       dac33->nsample);
1124                 dac33->t_stamp1 = 0;
1125                 dac33->t_stamp2 = 0;
1126                 break;
1127         case DAC33_FIFO_MODE7:
1128                 if (dac33->auto_fifo_config) {
1129                         dac33->uthr = UTHR_FROM_PERIOD_SIZE(
1130                                         period_size,
1131                                         rate,
1132                                         dac33->burst_rate) + 9;
1133                         if (dac33->uthr > MODE7_UTHR)
1134                                 dac33->uthr = MODE7_UTHR;
1135                         if (dac33->uthr < (MODE7_LTHR + 10))
1136                                 dac33->uthr = (MODE7_LTHR + 10);
1137                 }
1138                 dac33->mode7_us_to_lthr =
1139                                 SAMPLES_TO_US(substream->runtime->rate,
1140                                         dac33->uthr - MODE7_LTHR + 1);
1141                 dac33->t_stamp1 = 0;
1142                 break;
1143         default:
1144                 break;
1145         }
1146
1147 }
1148
1149 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1150                              struct snd_soc_dai *dai)
1151 {
1152         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1153         struct snd_soc_codec *codec = rtd->codec;
1154         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1155         int ret = 0;
1156
1157         switch (cmd) {
1158         case SNDRV_PCM_TRIGGER_START:
1159         case SNDRV_PCM_TRIGGER_RESUME:
1160         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1161                 if (dac33->fifo_mode) {
1162                         dac33->state = DAC33_PREFILL;
1163                         queue_work(dac33->dac33_wq, &dac33->work);
1164                 }
1165                 break;
1166         case SNDRV_PCM_TRIGGER_STOP:
1167         case SNDRV_PCM_TRIGGER_SUSPEND:
1168         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1169                 if (dac33->fifo_mode) {
1170                         dac33->state = DAC33_FLUSH;
1171                         queue_work(dac33->dac33_wq, &dac33->work);
1172                 }
1173                 break;
1174         default:
1175                 ret = -EINVAL;
1176         }
1177
1178         return ret;
1179 }
1180
1181 static snd_pcm_sframes_t dac33_dai_delay(
1182                         struct snd_pcm_substream *substream,
1183                         struct snd_soc_dai *dai)
1184 {
1185         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1186         struct snd_soc_codec *codec = rtd->codec;
1187         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1188         unsigned long long t0, t1, t_now;
1189         unsigned int time_delta, uthr;
1190         int samples_out, samples_in, samples;
1191         snd_pcm_sframes_t delay = 0;
1192
1193         switch (dac33->fifo_mode) {
1194         case DAC33_FIFO_BYPASS:
1195                 break;
1196         case DAC33_FIFO_MODE1:
1197                 spin_lock(&dac33->lock);
1198                 t0 = dac33->t_stamp1;
1199                 t1 = dac33->t_stamp2;
1200                 spin_unlock(&dac33->lock);
1201                 t_now = ktime_to_us(ktime_get());
1202
1203                 /* We have not started to fill the FIFO yet, delay is 0 */
1204                 if (!t1)
1205                         goto out;
1206
1207                 if (t0 > t1) {
1208                         /*
1209                          * Phase 1:
1210                          * After Alarm threshold, and before nSample write
1211                          */
1212                         time_delta = t_now - t0;
1213                         samples_out = time_delta ? US_TO_SAMPLES(
1214                                                 substream->runtime->rate,
1215                                                 time_delta) : 0;
1216
1217                         if (likely(dac33->alarm_threshold > samples_out))
1218                                 delay = dac33->alarm_threshold - samples_out;
1219                         else
1220                                 delay = 0;
1221                 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1222                         /*
1223                          * Phase 2:
1224                          * After nSample write (during burst operation)
1225                          */
1226                         time_delta = t_now - t0;
1227                         samples_out = time_delta ? US_TO_SAMPLES(
1228                                                 substream->runtime->rate,
1229                                                 time_delta) : 0;
1230
1231                         time_delta = t_now - t1;
1232                         samples_in = time_delta ? US_TO_SAMPLES(
1233                                                 dac33->burst_rate,
1234                                                 time_delta) : 0;
1235
1236                         samples = dac33->alarm_threshold;
1237                         samples += (samples_in - samples_out);
1238
1239                         if (likely(samples > 0))
1240                                 delay = samples;
1241                         else
1242                                 delay = 0;
1243                 } else {
1244                         /*
1245                          * Phase 3:
1246                          * After burst operation, before next alarm threshold
1247                          */
1248                         time_delta = t_now - t0;
1249                         samples_out = time_delta ? US_TO_SAMPLES(
1250                                                 substream->runtime->rate,
1251                                                 time_delta) : 0;
1252
1253                         samples_in = dac33->nsample;
1254                         samples = dac33->alarm_threshold;
1255                         samples += (samples_in - samples_out);
1256
1257                         if (likely(samples > 0))
1258                                 delay = samples > DAC33_BUFFER_SIZE_SAMPLES ?
1259                                         DAC33_BUFFER_SIZE_SAMPLES : samples;
1260                         else
1261                                 delay = 0;
1262                 }
1263                 break;
1264         case DAC33_FIFO_MODE7:
1265                 spin_lock(&dac33->lock);
1266                 t0 = dac33->t_stamp1;
1267                 uthr = dac33->uthr;
1268                 spin_unlock(&dac33->lock);
1269                 t_now = ktime_to_us(ktime_get());
1270
1271                 /* We have not started to fill the FIFO yet, delay is 0 */
1272                 if (!t0)
1273                         goto out;
1274
1275                 if (t_now <= t0) {
1276                         /*
1277                          * Either the timestamps are messed or equal. Report
1278                          * maximum delay
1279                          */
1280                         delay = uthr;
1281                         goto out;
1282                 }
1283
1284                 time_delta = t_now - t0;
1285                 if (time_delta <= dac33->mode7_us_to_lthr) {
1286                         /*
1287                         * Phase 1:
1288                         * After burst (draining phase)
1289                         */
1290                         samples_out = US_TO_SAMPLES(
1291                                         substream->runtime->rate,
1292                                         time_delta);
1293
1294                         if (likely(uthr > samples_out))
1295                                 delay = uthr - samples_out;
1296                         else
1297                                 delay = 0;
1298                 } else {
1299                         /*
1300                         * Phase 2:
1301                         * During burst operation
1302                         */
1303                         time_delta = time_delta - dac33->mode7_us_to_lthr;
1304
1305                         samples_out = US_TO_SAMPLES(
1306                                         substream->runtime->rate,
1307                                         time_delta);
1308                         samples_in = US_TO_SAMPLES(
1309                                         dac33->burst_rate,
1310                                         time_delta);
1311                         delay = MODE7_LTHR + samples_in - samples_out;
1312
1313                         if (unlikely(delay > uthr))
1314                                 delay = uthr;
1315                 }
1316                 break;
1317         default:
1318                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1319                                                         dac33->fifo_mode);
1320                 break;
1321         }
1322 out:
1323         return delay;
1324 }
1325
1326 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1327                 int clk_id, unsigned int freq, int dir)
1328 {
1329         struct snd_soc_codec *codec = codec_dai->codec;
1330         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1331         u8 ioc_reg, asrcb_reg;
1332
1333         ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1334         asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1335         switch (clk_id) {
1336         case TLV320DAC33_MCLK:
1337                 ioc_reg |= DAC33_REFSEL;
1338                 asrcb_reg |= DAC33_SRCREFSEL;
1339                 break;
1340         case TLV320DAC33_SLEEPCLK:
1341                 ioc_reg &= ~DAC33_REFSEL;
1342                 asrcb_reg &= ~DAC33_SRCREFSEL;
1343                 break;
1344         default:
1345                 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1346                 break;
1347         }
1348         dac33->refclk = freq;
1349
1350         dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1351         dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1352
1353         return 0;
1354 }
1355
1356 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1357                              unsigned int fmt)
1358 {
1359         struct snd_soc_codec *codec = codec_dai->codec;
1360         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1361         u8 aictrl_a, aictrl_b;
1362
1363         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1364         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1365         /* set master/slave audio interface */
1366         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1367         case SND_SOC_DAIFMT_CBM_CFM:
1368                 /* Codec Master */
1369                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1370                 break;
1371         case SND_SOC_DAIFMT_CBS_CFS:
1372                 /* Codec Slave */
1373                 if (dac33->fifo_mode) {
1374                         dev_err(codec->dev, "FIFO mode requires master mode\n");
1375                         return -EINVAL;
1376                 } else
1377                         aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1378                 break;
1379         default:
1380                 return -EINVAL;
1381         }
1382
1383         aictrl_a &= ~DAC33_AFMT_MASK;
1384         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1385         case SND_SOC_DAIFMT_I2S:
1386                 aictrl_a |= DAC33_AFMT_I2S;
1387                 break;
1388         case SND_SOC_DAIFMT_DSP_A:
1389                 aictrl_a |= DAC33_AFMT_DSP;
1390                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1391                 aictrl_b |= DAC33_DATA_DELAY(0);
1392                 break;
1393         case SND_SOC_DAIFMT_RIGHT_J:
1394                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1395                 break;
1396         case SND_SOC_DAIFMT_LEFT_J:
1397                 aictrl_a |= DAC33_AFMT_LEFT_J;
1398                 break;
1399         default:
1400                 dev_err(codec->dev, "Unsupported format (%u)\n",
1401                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1402                 return -EINVAL;
1403         }
1404
1405         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1406         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1407
1408         return 0;
1409 }
1410
1411 static int dac33_soc_probe(struct snd_soc_codec *codec)
1412 {
1413         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1414         int ret = 0;
1415
1416         codec->control_data = dac33->control_data;
1417         codec->hw_write = (hw_write_t) i2c_master_send;
1418         codec->idle_bias_off = 1;
1419         dac33->codec = codec;
1420
1421         /* Read the tlv320dac33 ID registers */
1422         ret = dac33_hard_power(codec, 1);
1423         if (ret != 0) {
1424                 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1425                 goto err_power;
1426         }
1427         ret = dac33_read_id(codec);
1428         dac33_hard_power(codec, 0);
1429
1430         if (ret < 0) {
1431                 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1432                 ret = -ENODEV;
1433                 goto err_power;
1434         }
1435
1436         /* Check if the IRQ number is valid and request it */
1437         if (dac33->irq >= 0) {
1438                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1439                                   IRQF_TRIGGER_RISING | IRQF_DISABLED,
1440                                   codec->name, codec);
1441                 if (ret < 0) {
1442                         dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1443                                                 dac33->irq, ret);
1444                         dac33->irq = -1;
1445                 }
1446                 if (dac33->irq != -1) {
1447                         /* Setup work queue */
1448                         dac33->dac33_wq =
1449                                 create_singlethread_workqueue("tlv320dac33");
1450                         if (dac33->dac33_wq == NULL) {
1451                                 free_irq(dac33->irq, codec);
1452                                 return -ENOMEM;
1453                         }
1454
1455                         INIT_WORK(&dac33->work, dac33_work);
1456                 }
1457         }
1458
1459         snd_soc_add_controls(codec, dac33_snd_controls,
1460                              ARRAY_SIZE(dac33_snd_controls));
1461         /* Only add the FIFO controls, if we have valid IRQ number */
1462         if (dac33->irq >= 0) {
1463                 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1464                                      ARRAY_SIZE(dac33_mode_snd_controls));
1465                 /* FIFO usage controls only, if autoio config is not selected */
1466                 if (!dac33->auto_fifo_config)
1467                         snd_soc_add_controls(codec, dac33_fifo_snd_controls,
1468                                         ARRAY_SIZE(dac33_fifo_snd_controls));
1469         }
1470         dac33_add_widgets(codec);
1471
1472 err_power:
1473         return ret;
1474 }
1475
1476 static int dac33_soc_remove(struct snd_soc_codec *codec)
1477 {
1478         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1479
1480         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1481
1482         if (dac33->irq >= 0) {
1483                 free_irq(dac33->irq, dac33->codec);
1484                 destroy_workqueue(dac33->dac33_wq);
1485         }
1486         return 0;
1487 }
1488
1489 static int dac33_soc_suspend(struct snd_soc_codec *codec, pm_message_t state)
1490 {
1491         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1492
1493         return 0;
1494 }
1495
1496 static int dac33_soc_resume(struct snd_soc_codec *codec)
1497 {
1498         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1499
1500         return 0;
1501 }
1502
1503 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1504         .read = dac33_read_reg_cache,
1505         .write = dac33_write_locked,
1506         .set_bias_level = dac33_set_bias_level,
1507         .reg_cache_size = ARRAY_SIZE(dac33_reg),
1508         .reg_word_size = sizeof(u8),
1509         .reg_cache_default = dac33_reg,
1510         .probe = dac33_soc_probe,
1511         .remove = dac33_soc_remove,
1512         .suspend = dac33_soc_suspend,
1513         .resume = dac33_soc_resume,
1514 };
1515
1516 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1517                          SNDRV_PCM_RATE_48000)
1518 #define DAC33_FORMATS   SNDRV_PCM_FMTBIT_S16_LE
1519
1520 static struct snd_soc_dai_ops dac33_dai_ops = {
1521         .startup        = dac33_startup,
1522         .shutdown       = dac33_shutdown,
1523         .hw_params      = dac33_hw_params,
1524         .trigger        = dac33_pcm_trigger,
1525         .delay          = dac33_dai_delay,
1526         .set_sysclk     = dac33_set_dai_sysclk,
1527         .set_fmt        = dac33_set_dai_fmt,
1528 };
1529
1530 static struct snd_soc_dai_driver dac33_dai = {
1531         .name = "tlv320dac33-hifi",
1532         .playback = {
1533                 .stream_name = "Playback",
1534                 .channels_min = 2,
1535                 .channels_max = 2,
1536                 .rates = DAC33_RATES,
1537                 .formats = DAC33_FORMATS,},
1538         .ops = &dac33_dai_ops,
1539 };
1540
1541 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1542                                      const struct i2c_device_id *id)
1543 {
1544         struct tlv320dac33_platform_data *pdata;
1545         struct tlv320dac33_priv *dac33;
1546         int ret, i;
1547
1548         if (client->dev.platform_data == NULL) {
1549                 dev_err(&client->dev, "Platform data not set\n");
1550                 return -ENODEV;
1551         }
1552         pdata = client->dev.platform_data;
1553
1554         dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1555         if (dac33 == NULL)
1556                 return -ENOMEM;
1557
1558         dac33->control_data = client;
1559         mutex_init(&dac33->mutex);
1560         spin_lock_init(&dac33->lock);
1561
1562         i2c_set_clientdata(client, dac33);
1563
1564         dac33->power_gpio = pdata->power_gpio;
1565         dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1566         /* Pre calculate the burst rate */
1567         dac33->burst_rate = BURST_BASEFREQ_HZ / dac33->burst_bclkdiv / 32;
1568         dac33->keep_bclk = pdata->keep_bclk;
1569         dac33->auto_fifo_config = pdata->auto_fifo_config;
1570         dac33->mode1_latency = pdata->mode1_latency;
1571         if (!dac33->mode1_latency)
1572                 dac33->mode1_latency = 10000; /* 10ms */
1573         dac33->irq = client->irq;
1574         dac33->nsample = NSAMPLE_MAX;
1575         dac33->nsample_max = NSAMPLE_MAX;
1576         dac33->uthr = MODE7_UTHR;
1577         /* Disable FIFO use by default */
1578         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1579
1580         /* Check if the reset GPIO number is valid and request it */
1581         if (dac33->power_gpio >= 0) {
1582                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1583                 if (ret < 0) {
1584                         dev_err(&client->dev,
1585                                 "Failed to request reset GPIO (%d)\n",
1586                                 dac33->power_gpio);
1587                         goto err_gpio;
1588                 }
1589                 gpio_direction_output(dac33->power_gpio, 0);
1590         }
1591
1592         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1593                 dac33->supplies[i].supply = dac33_supply_names[i];
1594
1595         ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1596                                  dac33->supplies);
1597
1598         if (ret != 0) {
1599                 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1600                 goto err_get;
1601         }
1602
1603         ret = snd_soc_register_codec(&client->dev,
1604                         &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1605         if (ret < 0)
1606                 goto err_register;
1607
1608         return ret;
1609 err_register:
1610         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1611 err_get:
1612         if (dac33->power_gpio >= 0)
1613                 gpio_free(dac33->power_gpio);
1614 err_gpio:
1615         kfree(dac33);
1616         return ret;
1617 }
1618
1619 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1620 {
1621         struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1622
1623         if (unlikely(dac33->chip_power))
1624                 dac33_hard_power(dac33->codec, 0);
1625
1626         if (dac33->power_gpio >= 0)
1627                 gpio_free(dac33->power_gpio);
1628
1629         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1630
1631         snd_soc_unregister_codec(&client->dev);
1632         kfree(dac33);
1633
1634         return 0;
1635 }
1636
1637 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1638         {
1639                 .name = "tlv320dac33",
1640                 .driver_data = 0,
1641         },
1642         { },
1643 };
1644
1645 static struct i2c_driver tlv320dac33_i2c_driver = {
1646         .driver = {
1647                 .name = "tlv320dac33-codec",
1648                 .owner = THIS_MODULE,
1649         },
1650         .probe          = dac33_i2c_probe,
1651         .remove         = __devexit_p(dac33_i2c_remove),
1652         .id_table       = tlv320dac33_i2c_id,
1653 };
1654
1655 static int __init dac33_module_init(void)
1656 {
1657         int r;
1658         r = i2c_add_driver(&tlv320dac33_i2c_driver);
1659         if (r < 0) {
1660                 printk(KERN_ERR "DAC33: driver registration failed\n");
1661                 return r;
1662         }
1663         return 0;
1664 }
1665 module_init(dac33_module_init);
1666
1667 static void __exit dac33_module_exit(void)
1668 {
1669         i2c_del_driver(&tlv320dac33_i2c_driver);
1670 }
1671 module_exit(dac33_module_exit);
1672
1673
1674 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1675 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1676 MODULE_LICENSE("GPL");