faa5e9fb1471de20e93a4fb108ffb884b0eb6f38
[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@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/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/initval.h>
40 #include <sound/tlv.h>
41
42 #include <sound/tlv320dac33-plat.h>
43 #include "tlv320dac33.h"
44
45 /*
46  * The internal FIFO is 24576 bytes long
47  * It can be configured to hold 16bit or 24bit samples
48  * In 16bit configuration the FIFO can hold 6144 stereo samples
49  * In 24bit configuration the FIFO can hold 4096 stereo samples
50  */
51 #define DAC33_FIFO_SIZE_16BIT   6144
52 #define DAC33_FIFO_SIZE_24BIT   4096
53 #define DAC33_MODE7_MARGIN      10      /* Safety margin for FIFO in Mode7 */
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         enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
104         unsigned int fifo_size;         /* Size of the FIFO in samples */
105         unsigned int nsample;           /* burst read amount from host */
106         int mode1_latency;              /* latency caused by the i2c writes in
107                                          * us */
108         u8 burst_bclkdiv;               /* BCLK divider value in burst mode */
109         unsigned int burst_rate;        /* Interface speed in Burst modes */
110
111         int keep_bclk;                  /* Keep the BCLK continuously running
112                                          * in FIFO modes */
113         spinlock_t lock;
114         unsigned long long t_stamp1;    /* Time stamp for FIFO modes to */
115         unsigned long long t_stamp2;    /* calculate the FIFO caused delay */
116
117         unsigned int mode1_us_burst;    /* Time to burst read n number of
118                                          * samples */
119         unsigned int mode7_us_to_lthr;  /* Time to reach lthr from uthr */
120
121         unsigned int uthr;
122
123         enum dac33_state state;
124         enum snd_soc_control_type control_type;
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);
432                         dac33_prepare_chip(dac33->substream);
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_kcontrol_chip(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_kcontrol_chip(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 (codec->active)
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 const struct soc_enum dac33_fifo_mode_enum =
481         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
482                             dac33_fifo_mode_texts);
483
484 /* L/R Line Output Gain */
485 static const char *lr_lineout_gain_texts[] = {
486         "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
487         "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
488 };
489
490 static const struct soc_enum l_lineout_gain_enum =
491         SOC_ENUM_SINGLE(DAC33_LDAC_PWR_CTRL, 0,
492                         ARRAY_SIZE(lr_lineout_gain_texts),
493                         lr_lineout_gain_texts);
494
495 static const struct soc_enum r_lineout_gain_enum =
496         SOC_ENUM_SINGLE(DAC33_RDAC_PWR_CTRL, 0,
497                         ARRAY_SIZE(lr_lineout_gain_texts),
498                         lr_lineout_gain_texts);
499
500 /*
501  * DACL/R digital volume control:
502  * from 0 dB to -63.5 in 0.5 dB steps
503  * Need to be inverted later on:
504  * 0x00 == 0 dB
505  * 0x7f == -63.5 dB
506  */
507 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
508
509 static const struct snd_kcontrol_new dac33_snd_controls[] = {
510         SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
511                 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
512                 0, 0x7f, 1, dac_digivol_tlv),
513         SOC_DOUBLE_R("DAC Digital Playback Switch",
514                  DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
515         SOC_DOUBLE_R("Line to Line Out Volume",
516                  DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
517         SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
518         SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
519 };
520
521 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
522         SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
523                  dac33_get_fifo_mode, dac33_set_fifo_mode),
524 };
525
526 /* Analog bypass */
527 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
528         SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
529
530 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
531         SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
532
533 /* LOP L/R invert selection */
534 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
535
536 static const struct soc_enum dac33_left_lom_enum =
537         SOC_ENUM_SINGLE(DAC33_OUT_AMP_CTRL, 3,
538                         ARRAY_SIZE(dac33_lr_lom_texts),
539                         dac33_lr_lom_texts);
540
541 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
542 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
543
544 static const struct soc_enum dac33_right_lom_enum =
545         SOC_ENUM_SINGLE(DAC33_OUT_AMP_CTRL, 2,
546                         ARRAY_SIZE(dac33_lr_lom_texts),
547                         dac33_lr_lom_texts);
548
549 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
550 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
551
552 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
553         SND_SOC_DAPM_OUTPUT("LEFT_LO"),
554         SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
555
556         SND_SOC_DAPM_INPUT("LINEL"),
557         SND_SOC_DAPM_INPUT("LINER"),
558
559         SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
560         SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
561
562         /* Analog bypass */
563         SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
564                                 &dac33_dapm_abypassl_control),
565         SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
566                                 &dac33_dapm_abypassr_control),
567
568         SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
569                 &dac33_dapm_left_lom_control),
570         SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
571                 &dac33_dapm_right_lom_control),
572         /*
573          * For DAPM path, when only the anlog bypass path is enabled, and the
574          * LOP inverted from the corresponding DAC side.
575          * This is needed, so we can attach the DAC power supply in this case.
576          */
577         SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
578         SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
579
580         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
581                          DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
582         SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
583                          DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
584
585         SND_SOC_DAPM_SUPPLY("Left DAC Power",
586                             DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
587         SND_SOC_DAPM_SUPPLY("Right DAC Power",
588                             DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
589
590         SND_SOC_DAPM_SUPPLY("Codec Power",
591                             DAC33_PWR_CTRL, 4, 0, NULL, 0),
592
593         SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
594         SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
595 };
596
597 static const struct snd_soc_dapm_route audio_map[] = {
598         /* Analog bypass */
599         {"Analog Left Bypass", "Switch", "LINEL"},
600         {"Analog Right Bypass", "Switch", "LINER"},
601
602         {"Output Left Amplifier", NULL, "DACL"},
603         {"Output Right Amplifier", NULL, "DACR"},
604
605         {"Left Bypass PGA", NULL, "Analog Left Bypass"},
606         {"Right Bypass PGA", NULL, "Analog Right Bypass"},
607
608         {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
609         {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
610         {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
611         {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
612
613         {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
614         {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
615
616         {"DACL", NULL, "Left DAC Power"},
617         {"DACR", NULL, "Right DAC Power"},
618
619         {"Left Bypass PGA", NULL, "Left DAC Power"},
620         {"Right Bypass PGA", NULL, "Right DAC Power"},
621
622         /* output */
623         {"LEFT_LO", NULL, "Output Left Amplifier"},
624         {"RIGHT_LO", NULL, "Output Right Amplifier"},
625
626         {"LEFT_LO", NULL, "Codec Power"},
627         {"RIGHT_LO", NULL, "Codec Power"},
628 };
629
630 static int dac33_add_widgets(struct snd_soc_codec *codec)
631 {
632         struct snd_soc_dapm_context *dapm = &codec->dapm;
633
634         snd_soc_dapm_new_controls(dapm, dac33_dapm_widgets,
635                                   ARRAY_SIZE(dac33_dapm_widgets));
636         /* set up audio path interconnects */
637         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
638
639         return 0;
640 }
641
642 static int dac33_set_bias_level(struct snd_soc_codec *codec,
643                                 enum snd_soc_bias_level level)
644 {
645         int ret;
646
647         switch (level) {
648         case SND_SOC_BIAS_ON:
649                 break;
650         case SND_SOC_BIAS_PREPARE:
651                 break;
652         case SND_SOC_BIAS_STANDBY:
653                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
654                         /* Coming from OFF, switch on the codec */
655                         ret = dac33_hard_power(codec, 1);
656                         if (ret != 0)
657                                 return ret;
658
659                         dac33_init_chip(codec);
660                 }
661                 break;
662         case SND_SOC_BIAS_OFF:
663                 /* Do not power off, when the codec is already off */
664                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
665                         return 0;
666                 ret = dac33_hard_power(codec, 0);
667                 if (ret != 0)
668                         return ret;
669                 break;
670         }
671         codec->dapm.bias_level = level;
672
673         return 0;
674 }
675
676 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
677 {
678         struct snd_soc_codec *codec = dac33->codec;
679         unsigned int delay;
680         unsigned long flags;
681
682         switch (dac33->fifo_mode) {
683         case DAC33_FIFO_MODE1:
684                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
685                         DAC33_THRREG(dac33->nsample));
686
687                 /* Take the timestamps */
688                 spin_lock_irqsave(&dac33->lock, flags);
689                 dac33->t_stamp2 = ktime_to_us(ktime_get());
690                 dac33->t_stamp1 = dac33->t_stamp2;
691                 spin_unlock_irqrestore(&dac33->lock, flags);
692
693                 dac33_write16(codec, DAC33_PREFILL_MSB,
694                                 DAC33_THRREG(dac33->alarm_threshold));
695                 /* Enable Alarm Threshold IRQ with a delay */
696                 delay = SAMPLES_TO_US(dac33->burst_rate,
697                                      dac33->alarm_threshold) + 1000;
698                 usleep_range(delay, delay + 500);
699                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
700                 break;
701         case DAC33_FIFO_MODE7:
702                 /* Take the timestamp */
703                 spin_lock_irqsave(&dac33->lock, flags);
704                 dac33->t_stamp1 = ktime_to_us(ktime_get());
705                 /* Move back the timestamp with drain time */
706                 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
707                 spin_unlock_irqrestore(&dac33->lock, flags);
708
709                 dac33_write16(codec, DAC33_PREFILL_MSB,
710                                 DAC33_THRREG(DAC33_MODE7_MARGIN));
711
712                 /* Enable Upper Threshold IRQ */
713                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
714                 break;
715         default:
716                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
717                                                         dac33->fifo_mode);
718                 break;
719         }
720 }
721
722 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
723 {
724         struct snd_soc_codec *codec = dac33->codec;
725         unsigned long flags;
726
727         switch (dac33->fifo_mode) {
728         case DAC33_FIFO_MODE1:
729                 /* Take the timestamp */
730                 spin_lock_irqsave(&dac33->lock, flags);
731                 dac33->t_stamp2 = ktime_to_us(ktime_get());
732                 spin_unlock_irqrestore(&dac33->lock, flags);
733
734                 dac33_write16(codec, DAC33_NSAMPLE_MSB,
735                                 DAC33_THRREG(dac33->nsample));
736                 break;
737         case DAC33_FIFO_MODE7:
738                 /* At the moment we are not using interrupts in mode7 */
739                 break;
740         default:
741                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
742                                                         dac33->fifo_mode);
743                 break;
744         }
745 }
746
747 static void dac33_work(struct work_struct *work)
748 {
749         struct snd_soc_codec *codec;
750         struct tlv320dac33_priv *dac33;
751         u8 reg;
752
753         dac33 = container_of(work, struct tlv320dac33_priv, work);
754         codec = dac33->codec;
755
756         mutex_lock(&dac33->mutex);
757         switch (dac33->state) {
758         case DAC33_PREFILL:
759                 dac33->state = DAC33_PLAYBACK;
760                 dac33_prefill_handler(dac33);
761                 break;
762         case DAC33_PLAYBACK:
763                 dac33_playback_handler(dac33);
764                 break;
765         case DAC33_IDLE:
766                 break;
767         case DAC33_FLUSH:
768                 dac33->state = DAC33_IDLE;
769                 /* Mask all interrupts from dac33 */
770                 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
771
772                 /* flush fifo */
773                 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
774                 reg |= DAC33_FIFOFLUSH;
775                 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
776                 break;
777         }
778         mutex_unlock(&dac33->mutex);
779 }
780
781 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
782 {
783         struct snd_soc_codec *codec = dev;
784         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
785         unsigned long flags;
786
787         spin_lock_irqsave(&dac33->lock, flags);
788         dac33->t_stamp1 = ktime_to_us(ktime_get());
789         spin_unlock_irqrestore(&dac33->lock, flags);
790
791         /* Do not schedule the workqueue in Mode7 */
792         if (dac33->fifo_mode != DAC33_FIFO_MODE7)
793                 queue_work(dac33->dac33_wq, &dac33->work);
794
795         return IRQ_HANDLED;
796 }
797
798 static void dac33_oscwait(struct snd_soc_codec *codec)
799 {
800         int timeout = 60;
801         u8 reg;
802
803         do {
804                 usleep_range(1000, 2000);
805                 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
806         } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
807         if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
808                 dev_err(codec->dev,
809                         "internal oscillator calibration failed\n");
810 }
811
812 static int dac33_startup(struct snd_pcm_substream *substream,
813                            struct snd_soc_dai *dai)
814 {
815         struct snd_soc_pcm_runtime *rtd = substream->private_data;
816         struct snd_soc_codec *codec = rtd->codec;
817         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
818
819         /* Stream started, save the substream pointer */
820         dac33->substream = substream;
821
822         snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
823
824         return 0;
825 }
826
827 static void dac33_shutdown(struct snd_pcm_substream *substream,
828                              struct snd_soc_dai *dai)
829 {
830         struct snd_soc_pcm_runtime *rtd = substream->private_data;
831         struct snd_soc_codec *codec = rtd->codec;
832         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
833
834         dac33->substream = NULL;
835 }
836
837 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
838         (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
839 static int dac33_hw_params(struct snd_pcm_substream *substream,
840                            struct snd_pcm_hw_params *params,
841                            struct snd_soc_dai *dai)
842 {
843         struct snd_soc_pcm_runtime *rtd = substream->private_data;
844         struct snd_soc_codec *codec = rtd->codec;
845         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
846
847         /* Check parameters for validity */
848         switch (params_rate(params)) {
849         case 44100:
850         case 48000:
851                 break;
852         default:
853                 dev_err(codec->dev, "unsupported rate %d\n",
854                         params_rate(params));
855                 return -EINVAL;
856         }
857
858         switch (params_format(params)) {
859         case SNDRV_PCM_FORMAT_S16_LE:
860                 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
861                 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
862                 break;
863         case SNDRV_PCM_FORMAT_S32_LE:
864                 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
865                 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
866                 break;
867         default:
868                 dev_err(codec->dev, "unsupported format %d\n",
869                         params_format(params));
870                 return -EINVAL;
871         }
872
873         return 0;
874 }
875
876 #define CALC_OSCSET(rate, refclk) ( \
877         ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
878 #define CALC_RATIOSET(rate, refclk) ( \
879         ((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
880
881 /*
882  * tlv320dac33 is strict on the sequence of the register writes, if the register
883  * writes happens in different order, than dac33 might end up in unknown state.
884  * Use the known, working sequence of register writes to initialize the dac33.
885  */
886 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
887 {
888         struct snd_soc_pcm_runtime *rtd = substream->private_data;
889         struct snd_soc_codec *codec = rtd->codec;
890         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
891         unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
892         u8 aictrl_a, aictrl_b, fifoctrl_a;
893
894         switch (substream->runtime->rate) {
895         case 44100:
896         case 48000:
897                 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
898                 ratioset = CALC_RATIOSET(substream->runtime->rate,
899                                          dac33->refclk);
900                 break;
901         default:
902                 dev_err(codec->dev, "unsupported rate %d\n",
903                         substream->runtime->rate);
904                 return -EINVAL;
905         }
906
907
908         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
909         aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
910         /* Read FIFO control A, and clear FIFO flush bit */
911         fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
912         fifoctrl_a &= ~DAC33_FIFOFLUSH;
913
914         fifoctrl_a &= ~DAC33_WIDTH;
915         switch (substream->runtime->format) {
916         case SNDRV_PCM_FORMAT_S16_LE:
917                 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
918                 fifoctrl_a |= DAC33_WIDTH;
919                 break;
920         case SNDRV_PCM_FORMAT_S32_LE:
921                 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
922                 break;
923         default:
924                 dev_err(codec->dev, "unsupported format %d\n",
925                         substream->runtime->format);
926                 return -EINVAL;
927         }
928
929         mutex_lock(&dac33->mutex);
930
931         if (!dac33->chip_power) {
932                 /*
933                  * Chip is not powered yet.
934                  * Do the init in the dac33_set_bias_level later.
935                  */
936                 mutex_unlock(&dac33->mutex);
937                 return 0;
938         }
939
940         dac33_soft_power(codec, 0);
941         dac33_soft_power(codec, 1);
942
943         reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
944         dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
945
946         /* Write registers 0x08 and 0x09 (MSB, LSB) */
947         dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
948
949         /* OSC calibration time */
950         dac33_write(codec, DAC33_CALIB_TIME, 96);
951
952         /* adjustment treshold & step */
953         dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
954                                                  DAC33_ADJSTEP(1));
955
956         /* div=4 / gain=1 / div */
957         dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
958
959         pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
960         pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
961         dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
962
963         dac33_oscwait(codec);
964
965         if (dac33->fifo_mode) {
966                 /* Generic for all FIFO modes */
967                 /* 50-51 : ASRC Control registers */
968                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
969                 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
970
971                 /* Write registers 0x34 and 0x35 (MSB, LSB) */
972                 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
973
974                 /* Set interrupts to high active */
975                 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
976         } else {
977                 /* FIFO bypass mode */
978                 /* 50-51 : ASRC Control registers */
979                 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
980                 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
981         }
982
983         /* Interrupt behaviour configuration */
984         switch (dac33->fifo_mode) {
985         case DAC33_FIFO_MODE1:
986                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
987                             DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
988                 break;
989         case DAC33_FIFO_MODE7:
990                 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
991                         DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
992                 break;
993         default:
994                 /* in FIFO bypass mode, the interrupts are not used */
995                 break;
996         }
997
998         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
999
1000         switch (dac33->fifo_mode) {
1001         case DAC33_FIFO_MODE1:
1002                 /*
1003                  * For mode1:
1004                  * Disable the FIFO bypass (Enable the use of FIFO)
1005                  * Select nSample 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         case DAC33_FIFO_MODE7:
1016                 /*
1017                  * For mode1:
1018                  * Disable the FIFO bypass (Enable the use of FIFO)
1019                  * Select Threshold mode
1020                  * BCLK is only running when data is needed by DAC33
1021                  */
1022                 fifoctrl_a &= ~DAC33_FBYPAS;
1023                 fifoctrl_a |= DAC33_FAUTO;
1024                 if (dac33->keep_bclk)
1025                         aictrl_b |= DAC33_BCLKON;
1026                 else
1027                         aictrl_b &= ~DAC33_BCLKON;
1028                 break;
1029         default:
1030                 /*
1031                  * For FIFO bypass mode:
1032                  * Enable the FIFO bypass (Disable the FIFO use)
1033                  * Set the BCLK as continuous
1034                  */
1035                 fifoctrl_a |= DAC33_FBYPAS;
1036                 aictrl_b |= DAC33_BCLKON;
1037                 break;
1038         }
1039
1040         dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1041         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1042         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1043
1044         /*
1045          * BCLK divide ratio
1046          * 0: 1.5
1047          * 1: 1
1048          * 2: 2
1049          * ...
1050          * 254: 254
1051          * 255: 255
1052          */
1053         if (dac33->fifo_mode)
1054                 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1055                                                         dac33->burst_bclkdiv);
1056         else
1057                 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1058                         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1059                 else
1060                         dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
1061
1062         switch (dac33->fifo_mode) {
1063         case DAC33_FIFO_MODE1:
1064                 dac33_write16(codec, DAC33_ATHR_MSB,
1065                               DAC33_THRREG(dac33->alarm_threshold));
1066                 break;
1067         case DAC33_FIFO_MODE7:
1068                 /*
1069                  * Configure the threshold levels, and leave 10 sample space
1070                  * at the bottom, and also at the top of the FIFO
1071                  */
1072                 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1073                 dac33_write16(codec, DAC33_LTHR_MSB,
1074                               DAC33_THRREG(DAC33_MODE7_MARGIN));
1075                 break;
1076         default:
1077                 break;
1078         }
1079
1080         mutex_unlock(&dac33->mutex);
1081
1082         return 0;
1083 }
1084
1085 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1086 {
1087         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1088         struct snd_soc_codec *codec = rtd->codec;
1089         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1090         unsigned int period_size = substream->runtime->period_size;
1091         unsigned int rate = substream->runtime->rate;
1092         unsigned int nsample_limit;
1093
1094         /* In bypass mode we don't need to calculate */
1095         if (!dac33->fifo_mode)
1096                 return;
1097
1098         switch (dac33->fifo_mode) {
1099         case DAC33_FIFO_MODE1:
1100                 /* Number of samples under i2c latency */
1101                 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1102                                                 dac33->mode1_latency);
1103                 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1104
1105                 if (period_size <= dac33->alarm_threshold)
1106                         /*
1107                          * Configure nSamaple to number of periods,
1108                          * which covers the latency requironment.
1109                          */
1110                         dac33->nsample = period_size *
1111                                 ((dac33->alarm_threshold / period_size) +
1112                                 (dac33->alarm_threshold % period_size ?
1113                                 1 : 0));
1114                 else if (period_size > nsample_limit)
1115                         dac33->nsample = nsample_limit;
1116                 else
1117                         dac33->nsample = period_size;
1118
1119                 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1120                                                       dac33->nsample);
1121                 dac33->t_stamp1 = 0;
1122                 dac33->t_stamp2 = 0;
1123                 break;
1124         case DAC33_FIFO_MODE7:
1125                 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1126                                                     dac33->burst_rate) + 9;
1127                 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1128                         dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1129                 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1130                         dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1131
1132                 dac33->mode7_us_to_lthr =
1133                                 SAMPLES_TO_US(substream->runtime->rate,
1134                                         dac33->uthr - DAC33_MODE7_MARGIN + 1);
1135                 dac33->t_stamp1 = 0;
1136                 break;
1137         default:
1138                 break;
1139         }
1140
1141 }
1142
1143 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1144                              struct snd_soc_dai *dai)
1145 {
1146         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1147         struct snd_soc_codec *codec = rtd->codec;
1148         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1149         int ret = 0;
1150
1151         switch (cmd) {
1152         case SNDRV_PCM_TRIGGER_START:
1153         case SNDRV_PCM_TRIGGER_RESUME:
1154         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1155                 if (dac33->fifo_mode) {
1156                         dac33->state = DAC33_PREFILL;
1157                         queue_work(dac33->dac33_wq, &dac33->work);
1158                 }
1159                 break;
1160         case SNDRV_PCM_TRIGGER_STOP:
1161         case SNDRV_PCM_TRIGGER_SUSPEND:
1162         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1163                 if (dac33->fifo_mode) {
1164                         dac33->state = DAC33_FLUSH;
1165                         queue_work(dac33->dac33_wq, &dac33->work);
1166                 }
1167                 break;
1168         default:
1169                 ret = -EINVAL;
1170         }
1171
1172         return ret;
1173 }
1174
1175 static snd_pcm_sframes_t dac33_dai_delay(
1176                         struct snd_pcm_substream *substream,
1177                         struct snd_soc_dai *dai)
1178 {
1179         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1180         struct snd_soc_codec *codec = rtd->codec;
1181         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1182         unsigned long long t0, t1, t_now;
1183         unsigned int time_delta, uthr;
1184         int samples_out, samples_in, samples;
1185         snd_pcm_sframes_t delay = 0;
1186         unsigned long flags;
1187
1188         switch (dac33->fifo_mode) {
1189         case DAC33_FIFO_BYPASS:
1190                 break;
1191         case DAC33_FIFO_MODE1:
1192                 spin_lock_irqsave(&dac33->lock, flags);
1193                 t0 = dac33->t_stamp1;
1194                 t1 = dac33->t_stamp2;
1195                 spin_unlock_irqrestore(&dac33->lock, flags);
1196                 t_now = ktime_to_us(ktime_get());
1197
1198                 /* We have not started to fill the FIFO yet, delay is 0 */
1199                 if (!t1)
1200                         goto out;
1201
1202                 if (t0 > t1) {
1203                         /*
1204                          * Phase 1:
1205                          * After Alarm threshold, and before nSample write
1206                          */
1207                         time_delta = t_now - t0;
1208                         samples_out = time_delta ? US_TO_SAMPLES(
1209                                                 substream->runtime->rate,
1210                                                 time_delta) : 0;
1211
1212                         if (likely(dac33->alarm_threshold > samples_out))
1213                                 delay = dac33->alarm_threshold - samples_out;
1214                         else
1215                                 delay = 0;
1216                 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1217                         /*
1218                          * Phase 2:
1219                          * After nSample write (during burst operation)
1220                          */
1221                         time_delta = t_now - t0;
1222                         samples_out = time_delta ? US_TO_SAMPLES(
1223                                                 substream->runtime->rate,
1224                                                 time_delta) : 0;
1225
1226                         time_delta = t_now - t1;
1227                         samples_in = time_delta ? US_TO_SAMPLES(
1228                                                 dac33->burst_rate,
1229                                                 time_delta) : 0;
1230
1231                         samples = dac33->alarm_threshold;
1232                         samples += (samples_in - samples_out);
1233
1234                         if (likely(samples > 0))
1235                                 delay = samples;
1236                         else
1237                                 delay = 0;
1238                 } else {
1239                         /*
1240                          * Phase 3:
1241                          * After burst operation, before next alarm threshold
1242                          */
1243                         time_delta = t_now - t0;
1244                         samples_out = time_delta ? US_TO_SAMPLES(
1245                                                 substream->runtime->rate,
1246                                                 time_delta) : 0;
1247
1248                         samples_in = dac33->nsample;
1249                         samples = dac33->alarm_threshold;
1250                         samples += (samples_in - samples_out);
1251
1252                         if (likely(samples > 0))
1253                                 delay = samples > dac33->fifo_size ?
1254                                         dac33->fifo_size : samples;
1255                         else
1256                                 delay = 0;
1257                 }
1258                 break;
1259         case DAC33_FIFO_MODE7:
1260                 spin_lock_irqsave(&dac33->lock, flags);
1261                 t0 = dac33->t_stamp1;
1262                 uthr = dac33->uthr;
1263                 spin_unlock_irqrestore(&dac33->lock, flags);
1264                 t_now = ktime_to_us(ktime_get());
1265
1266                 /* We have not started to fill the FIFO yet, delay is 0 */
1267                 if (!t0)
1268                         goto out;
1269
1270                 if (t_now <= t0) {
1271                         /*
1272                          * Either the timestamps are messed or equal. Report
1273                          * maximum delay
1274                          */
1275                         delay = uthr;
1276                         goto out;
1277                 }
1278
1279                 time_delta = t_now - t0;
1280                 if (time_delta <= dac33->mode7_us_to_lthr) {
1281                         /*
1282                         * Phase 1:
1283                         * After burst (draining phase)
1284                         */
1285                         samples_out = US_TO_SAMPLES(
1286                                         substream->runtime->rate,
1287                                         time_delta);
1288
1289                         if (likely(uthr > samples_out))
1290                                 delay = uthr - samples_out;
1291                         else
1292                                 delay = 0;
1293                 } else {
1294                         /*
1295                         * Phase 2:
1296                         * During burst operation
1297                         */
1298                         time_delta = time_delta - dac33->mode7_us_to_lthr;
1299
1300                         samples_out = US_TO_SAMPLES(
1301                                         substream->runtime->rate,
1302                                         time_delta);
1303                         samples_in = US_TO_SAMPLES(
1304                                         dac33->burst_rate,
1305                                         time_delta);
1306                         delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1307
1308                         if (unlikely(delay > uthr))
1309                                 delay = uthr;
1310                 }
1311                 break;
1312         default:
1313                 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1314                                                         dac33->fifo_mode);
1315                 break;
1316         }
1317 out:
1318         return delay;
1319 }
1320
1321 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1322                 int clk_id, unsigned int freq, int dir)
1323 {
1324         struct snd_soc_codec *codec = codec_dai->codec;
1325         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1326         u8 ioc_reg, asrcb_reg;
1327
1328         ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1329         asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1330         switch (clk_id) {
1331         case TLV320DAC33_MCLK:
1332                 ioc_reg |= DAC33_REFSEL;
1333                 asrcb_reg |= DAC33_SRCREFSEL;
1334                 break;
1335         case TLV320DAC33_SLEEPCLK:
1336                 ioc_reg &= ~DAC33_REFSEL;
1337                 asrcb_reg &= ~DAC33_SRCREFSEL;
1338                 break;
1339         default:
1340                 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1341                 break;
1342         }
1343         dac33->refclk = freq;
1344
1345         dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1346         dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1347
1348         return 0;
1349 }
1350
1351 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1352                              unsigned int fmt)
1353 {
1354         struct snd_soc_codec *codec = codec_dai->codec;
1355         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1356         u8 aictrl_a, aictrl_b;
1357
1358         aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1359         aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1360         /* set master/slave audio interface */
1361         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1362         case SND_SOC_DAIFMT_CBM_CFM:
1363                 /* Codec Master */
1364                 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1365                 break;
1366         case SND_SOC_DAIFMT_CBS_CFS:
1367                 /* Codec Slave */
1368                 if (dac33->fifo_mode) {
1369                         dev_err(codec->dev, "FIFO mode requires master mode\n");
1370                         return -EINVAL;
1371                 } else
1372                         aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1373                 break;
1374         default:
1375                 return -EINVAL;
1376         }
1377
1378         aictrl_a &= ~DAC33_AFMT_MASK;
1379         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1380         case SND_SOC_DAIFMT_I2S:
1381                 aictrl_a |= DAC33_AFMT_I2S;
1382                 break;
1383         case SND_SOC_DAIFMT_DSP_A:
1384                 aictrl_a |= DAC33_AFMT_DSP;
1385                 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1386                 aictrl_b |= DAC33_DATA_DELAY(0);
1387                 break;
1388         case SND_SOC_DAIFMT_RIGHT_J:
1389                 aictrl_a |= DAC33_AFMT_RIGHT_J;
1390                 break;
1391         case SND_SOC_DAIFMT_LEFT_J:
1392                 aictrl_a |= DAC33_AFMT_LEFT_J;
1393                 break;
1394         default:
1395                 dev_err(codec->dev, "Unsupported format (%u)\n",
1396                         fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1397                 return -EINVAL;
1398         }
1399
1400         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1401         dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1402
1403         return 0;
1404 }
1405
1406 static int dac33_soc_probe(struct snd_soc_codec *codec)
1407 {
1408         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1409         int ret = 0;
1410
1411         codec->control_data = dac33->control_data;
1412         codec->hw_write = (hw_write_t) i2c_master_send;
1413         codec->dapm.idle_bias_off = 1;
1414         dac33->codec = codec;
1415
1416         /* Read the tlv320dac33 ID registers */
1417         ret = dac33_hard_power(codec, 1);
1418         if (ret != 0) {
1419                 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1420                 goto err_power;
1421         }
1422         ret = dac33_read_id(codec);
1423         dac33_hard_power(codec, 0);
1424
1425         if (ret < 0) {
1426                 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1427                 ret = -ENODEV;
1428                 goto err_power;
1429         }
1430
1431         /* Check if the IRQ number is valid and request it */
1432         if (dac33->irq >= 0) {
1433                 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1434                                   IRQF_TRIGGER_RISING | IRQF_DISABLED,
1435                                   codec->name, codec);
1436                 if (ret < 0) {
1437                         dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1438                                                 dac33->irq, ret);
1439                         dac33->irq = -1;
1440                 }
1441                 if (dac33->irq != -1) {
1442                         /* Setup work queue */
1443                         dac33->dac33_wq =
1444                                 create_singlethread_workqueue("tlv320dac33");
1445                         if (dac33->dac33_wq == NULL) {
1446                                 free_irq(dac33->irq, codec);
1447                                 return -ENOMEM;
1448                         }
1449
1450                         INIT_WORK(&dac33->work, dac33_work);
1451                 }
1452         }
1453
1454         snd_soc_add_controls(codec, dac33_snd_controls,
1455                              ARRAY_SIZE(dac33_snd_controls));
1456         /* Only add the FIFO controls, if we have valid IRQ number */
1457         if (dac33->irq >= 0)
1458                 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1459                                      ARRAY_SIZE(dac33_mode_snd_controls));
1460
1461         dac33_add_widgets(codec);
1462
1463 err_power:
1464         return ret;
1465 }
1466
1467 static int dac33_soc_remove(struct snd_soc_codec *codec)
1468 {
1469         struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1470
1471         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1472
1473         if (dac33->irq >= 0) {
1474                 free_irq(dac33->irq, dac33->codec);
1475                 destroy_workqueue(dac33->dac33_wq);
1476         }
1477         return 0;
1478 }
1479
1480 static int dac33_soc_suspend(struct snd_soc_codec *codec, pm_message_t state)
1481 {
1482         dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1483
1484         return 0;
1485 }
1486
1487 static int dac33_soc_resume(struct snd_soc_codec *codec)
1488 {
1489         dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1490
1491         return 0;
1492 }
1493
1494 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1495         .read = dac33_read_reg_cache,
1496         .write = dac33_write_locked,
1497         .set_bias_level = dac33_set_bias_level,
1498         .reg_cache_size = ARRAY_SIZE(dac33_reg),
1499         .reg_word_size = sizeof(u8),
1500         .reg_cache_default = dac33_reg,
1501         .probe = dac33_soc_probe,
1502         .remove = dac33_soc_remove,
1503         .suspend = dac33_soc_suspend,
1504         .resume = dac33_soc_resume,
1505 };
1506
1507 #define DAC33_RATES     (SNDRV_PCM_RATE_44100 | \
1508                          SNDRV_PCM_RATE_48000)
1509 #define DAC33_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1510
1511 static struct snd_soc_dai_ops dac33_dai_ops = {
1512         .startup        = dac33_startup,
1513         .shutdown       = dac33_shutdown,
1514         .hw_params      = dac33_hw_params,
1515         .trigger        = dac33_pcm_trigger,
1516         .delay          = dac33_dai_delay,
1517         .set_sysclk     = dac33_set_dai_sysclk,
1518         .set_fmt        = dac33_set_dai_fmt,
1519 };
1520
1521 static struct snd_soc_dai_driver dac33_dai = {
1522         .name = "tlv320dac33-hifi",
1523         .playback = {
1524                 .stream_name = "Playback",
1525                 .channels_min = 2,
1526                 .channels_max = 2,
1527                 .rates = DAC33_RATES,
1528                 .formats = DAC33_FORMATS,},
1529         .ops = &dac33_dai_ops,
1530 };
1531
1532 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1533                                      const struct i2c_device_id *id)
1534 {
1535         struct tlv320dac33_platform_data *pdata;
1536         struct tlv320dac33_priv *dac33;
1537         int ret, i;
1538
1539         if (client->dev.platform_data == NULL) {
1540                 dev_err(&client->dev, "Platform data not set\n");
1541                 return -ENODEV;
1542         }
1543         pdata = client->dev.platform_data;
1544
1545         dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1546         if (dac33 == NULL)
1547                 return -ENOMEM;
1548
1549         dac33->control_data = client;
1550         mutex_init(&dac33->mutex);
1551         spin_lock_init(&dac33->lock);
1552
1553         i2c_set_clientdata(client, dac33);
1554
1555         dac33->power_gpio = pdata->power_gpio;
1556         dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1557         dac33->keep_bclk = pdata->keep_bclk;
1558         dac33->mode1_latency = pdata->mode1_latency;
1559         if (!dac33->mode1_latency)
1560                 dac33->mode1_latency = 10000; /* 10ms */
1561         dac33->irq = client->irq;
1562         /* Disable FIFO use by default */
1563         dac33->fifo_mode = DAC33_FIFO_BYPASS;
1564
1565         /* Check if the reset GPIO number is valid and request it */
1566         if (dac33->power_gpio >= 0) {
1567                 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1568                 if (ret < 0) {
1569                         dev_err(&client->dev,
1570                                 "Failed to request reset GPIO (%d)\n",
1571                                 dac33->power_gpio);
1572                         goto err_gpio;
1573                 }
1574                 gpio_direction_output(dac33->power_gpio, 0);
1575         }
1576
1577         for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1578                 dac33->supplies[i].supply = dac33_supply_names[i];
1579
1580         ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1581                                  dac33->supplies);
1582
1583         if (ret != 0) {
1584                 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1585                 goto err_get;
1586         }
1587
1588         ret = snd_soc_register_codec(&client->dev,
1589                         &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1590         if (ret < 0)
1591                 goto err_register;
1592
1593         return ret;
1594 err_register:
1595         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1596 err_get:
1597         if (dac33->power_gpio >= 0)
1598                 gpio_free(dac33->power_gpio);
1599 err_gpio:
1600         kfree(dac33);
1601         return ret;
1602 }
1603
1604 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1605 {
1606         struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1607
1608         if (unlikely(dac33->chip_power))
1609                 dac33_hard_power(dac33->codec, 0);
1610
1611         if (dac33->power_gpio >= 0)
1612                 gpio_free(dac33->power_gpio);
1613
1614         regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1615
1616         snd_soc_unregister_codec(&client->dev);
1617         kfree(dac33);
1618
1619         return 0;
1620 }
1621
1622 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1623         {
1624                 .name = "tlv320dac33",
1625                 .driver_data = 0,
1626         },
1627         { },
1628 };
1629 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1630
1631 static struct i2c_driver tlv320dac33_i2c_driver = {
1632         .driver = {
1633                 .name = "tlv320dac33-codec",
1634                 .owner = THIS_MODULE,
1635         },
1636         .probe          = dac33_i2c_probe,
1637         .remove         = __devexit_p(dac33_i2c_remove),
1638         .id_table       = tlv320dac33_i2c_id,
1639 };
1640
1641 static int __init dac33_module_init(void)
1642 {
1643         int r;
1644         r = i2c_add_driver(&tlv320dac33_i2c_driver);
1645         if (r < 0) {
1646                 printk(KERN_ERR "DAC33: driver registration failed\n");
1647                 return r;
1648         }
1649         return 0;
1650 }
1651 module_init(dac33_module_init);
1652
1653 static void __exit dac33_module_exit(void)
1654 {
1655         i2c_del_driver(&tlv320dac33_i2c_driver);
1656 }
1657 module_exit(dac33_module_exit);
1658
1659
1660 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1661 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1662 MODULE_LICENSE("GPL");