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[linux-2.6/kvm.git] / sound / soc / codecs / tlv320dac33.c
blobfaa5e9fb1471de20e93a4fb108ffb884b0eb6f38
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");
kernel-based virtual machine