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Merge tag 'regmap-patch-initial' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / sound / soc / codecs / tlv320dac33.c
1 /*
2 * ALSA SoC Texas Instruments TLV320DAC33 codec driver
3 *
4 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
5 *
6 * Copyright: (C) 2009 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/pm.h>
29 #include <linux/i2c.h>
30 #include <linux/interrupt.h>
31 #include <linux/gpio.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/initval.h>
39 #include <sound/tlv.h>
40
41 #include <sound/tlv320dac33-plat.h>
42 #include "tlv320dac33.h"
43
44 /*
45 * The internal FIFO is 24576 bytes long
46 * It can be configured to hold 16bit or 24bit samples
47 * In 16bit configuration the FIFO can hold 6144 stereo samples
48 * In 24bit configuration the FIFO can hold 4096 stereo samples
49 */
50 #define DAC33_FIFO_SIZE_16BIT 6144
51 #define DAC33_FIFO_SIZE_24BIT 4096
52 #define DAC33_MODE7_MARGIN 10 /* Safety margin for FIFO in Mode7 */
53
54 #define BURST_BASEFREQ_HZ 49152000
55
56 #define SAMPLES_TO_US(rate, samples) \
57 (1000000000 / (((rate) * 1000) / (samples)))
58
59 #define US_TO_SAMPLES(rate, us) \
60 ((rate) / (1000000 / ((us) < 1000000 ? (us) : 1000000)))
61
62 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
63 (((samples)*5000) / (((burstrate)*5000) / ((burstrate) - (playrate))))
64
65 static void dac33_calculate_times(struct snd_pcm_substream *substream);
66 static int dac33_prepare_chip(struct snd_pcm_substream *substream);
67
68 enum dac33_state {
69 DAC33_IDLE = 0,
70 DAC33_PREFILL,
71 DAC33_PLAYBACK,
72 DAC33_FLUSH,
73 };
74
75 enum dac33_fifo_modes {
76 DAC33_FIFO_BYPASS = 0,
77 DAC33_FIFO_MODE1,
78 DAC33_FIFO_MODE7,
79 DAC33_FIFO_LAST_MODE,
80 };
81
82 #define DAC33_NUM_SUPPLIES 3
83 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
84 "AVDD",
85 "DVDD",
86 "IOVDD",
87 };
88
89 struct tlv320dac33_priv {
90 struct mutex mutex;
91 struct workqueue_struct *dac33_wq;
92 struct work_struct work;
93 struct snd_soc_codec *codec;
94 struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
95 struct snd_pcm_substream *substream;
96 int power_gpio;
97 int chip_power;
98 int irq;
99 unsigned int refclk;
100
101 unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
102 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
103 unsigned int fifo_size; /* Size of the FIFO in samples */
104 unsigned int nsample; /* burst read amount from host */
105 int mode1_latency; /* latency caused by the i2c writes in
106 * us */
107 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
108 unsigned int burst_rate; /* Interface speed in Burst modes */
109
110 int keep_bclk; /* Keep the BCLK continuously running
111 * in FIFO modes */
112 spinlock_t lock;
113 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */
114 unsigned long long t_stamp2; /* calculate the FIFO caused delay */
115
116 unsigned int mode1_us_burst; /* Time to burst read n number of
117 * samples */
118 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */
119
120 unsigned int uthr;
121
122 enum dac33_state state;
123 enum snd_soc_control_type control_type;
124 void *control_data;
125 };
126
127 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
128 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
129 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
130 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
131 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
132 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
133 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
134 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
135 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
136 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
137 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
138 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
139 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
140 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
141 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
142 0x00, 0x00, /* 0x38 - 0x39 */
143 /* Registers 0x3a - 0x3f are reserved */
144 0x00, 0x00, /* 0x3a - 0x3b */
145 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
146
147 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
148 0x00, 0x80, /* 0x44 - 0x45 */
149 /* Registers 0x46 - 0x47 are reserved */
150 0x80, 0x80, /* 0x46 - 0x47 */
151
152 0x80, 0x00, 0x00, /* 0x48 - 0x4a */
153 /* Registers 0x4b - 0x7c are reserved */
154 0x00, /* 0x4b */
155 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
156 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
157 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
158 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
159 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
160 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
161 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
162 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
163 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
164 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
165 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
166 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
167 0x00, /* 0x7c */
168
169 0xda, 0x33, 0x03, /* 0x7d - 0x7f */
170 };
171
172 /* Register read and write */
173 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
174 unsigned reg)
175 {
176 u8 *cache = codec->reg_cache;
177 if (reg >= DAC33_CACHEREGNUM)
178 return 0;
179
180 return cache[reg];
181 }
182
183 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
184 u8 reg, u8 value)
185 {
186 u8 *cache = codec->reg_cache;
187 if (reg >= DAC33_CACHEREGNUM)
188 return;
189
190 cache[reg] = value;
191 }
192
193 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
194 u8 *value)
195 {
196 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
197 int val, ret = 0;
198
199 *value = reg & 0xff;
200
201 /* If powered off, return the cached value */
202 if (dac33->chip_power) {
203 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
204 if (val < 0) {
205 dev_err(codec->dev, "Read failed (%d)\n", val);
206 value[0] = dac33_read_reg_cache(codec, reg);
207 ret = val;
208 } else {
209 value[0] = val;
210 dac33_write_reg_cache(codec, reg, val);
211 }
212 } else {
213 value[0] = dac33_read_reg_cache(codec, reg);
214 }
215
216 return ret;
217 }
218
219 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
220 unsigned int value)
221 {
222 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
223 u8 data[2];
224 int ret = 0;
225
226 /*
227 * data is
228 * D15..D8 dac33 register offset
229 * D7...D0 register data
230 */
231 data[0] = reg & 0xff;
232 data[1] = value & 0xff;
233
234 dac33_write_reg_cache(codec, data[0], data[1]);
235 if (dac33->chip_power) {
236 ret = codec->hw_write(codec->control_data, data, 2);
237 if (ret != 2)
238 dev_err(codec->dev, "Write failed (%d)\n", ret);
239 else
240 ret = 0;
241 }
242
243 return ret;
244 }
245
246 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
247 unsigned int value)
248 {
249 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
250 int ret;
251
252 mutex_lock(&dac33->mutex);
253 ret = dac33_write(codec, reg, value);
254 mutex_unlock(&dac33->mutex);
255
256 return ret;
257 }
258
259 #define DAC33_I2C_ADDR_AUTOINC 0x80
260 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
261 unsigned int value)
262 {
263 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
264 u8 data[3];
265 int ret = 0;
266
267 /*
268 * data is
269 * D23..D16 dac33 register offset
270 * D15..D8 register data MSB
271 * D7...D0 register data LSB
272 */
273 data[0] = reg & 0xff;
274 data[1] = (value >> 8) & 0xff;
275 data[2] = value & 0xff;
276
277 dac33_write_reg_cache(codec, data[0], data[1]);
278 dac33_write_reg_cache(codec, data[0] + 1, data[2]);
279
280 if (dac33->chip_power) {
281 /* We need to set autoincrement mode for 16 bit writes */
282 data[0] |= DAC33_I2C_ADDR_AUTOINC;
283 ret = codec->hw_write(codec->control_data, data, 3);
284 if (ret != 3)
285 dev_err(codec->dev, "Write failed (%d)\n", ret);
286 else
287 ret = 0;
288 }
289
290 return ret;
291 }
292
293 static void dac33_init_chip(struct snd_soc_codec *codec)
294 {
295 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
296
297 if (unlikely(!dac33->chip_power))
298 return;
299
300 /* A : DAC sample rate Fsref/1.5 */
301 dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
302 /* B : DAC src=normal, not muted */
303 dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
304 DAC33_DACSRCL_LEFT);
305 /* C : (defaults) */
306 dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
307
308 /* 73 : volume soft stepping control,
309 clock source = internal osc (?) */
310 dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
311
312 /* Restore only selected registers (gains mostly) */
313 dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
314 dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
315 dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
316 dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
317
318 dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
319 dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
320 dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
321 dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
322
323 dac33_write(codec, DAC33_OUT_AMP_CTRL,
324 dac33_read_reg_cache(codec, DAC33_OUT_AMP_CTRL));
325
326 dac33_write(codec, DAC33_LDAC_PWR_CTRL,
327 dac33_read_reg_cache(codec, DAC33_LDAC_PWR_CTRL));
328 dac33_write(codec, DAC33_RDAC_PWR_CTRL,
329 dac33_read_reg_cache(codec, DAC33_RDAC_PWR_CTRL));
330 }
331
332 static inline int dac33_read_id(struct snd_soc_codec *codec)
333 {
334 int i, ret = 0;
335 u8 reg;
336
337 for (i = 0; i < 3; i++) {
338 ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, &reg);
339 if (ret < 0)
340 break;
341 }
342
343 return ret;
344 }
345
346 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
347 {
348 u8 reg;
349
350 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
351 if (power)
352 reg |= DAC33_PDNALLB;
353 else
354 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
355 DAC33_DACRPDNB | DAC33_DACLPDNB);
356 dac33_write(codec, DAC33_PWR_CTRL, reg);
357 }
358
359 static inline void dac33_disable_digital(struct snd_soc_codec *codec)
360 {
361 u8 reg;
362
363 /* Stop the DAI clock */
364 reg = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
365 reg &= ~DAC33_BCLKON;
366 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg);
367
368 /* Power down the Oscillator, and DACs */
369 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
370 reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
371 dac33_write(codec, DAC33_PWR_CTRL, reg);
372 }
373
374 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
375 {
376 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
377 int ret = 0;
378
379 mutex_lock(&dac33->mutex);
380
381 /* Safety check */
382 if (unlikely(power == dac33->chip_power)) {
383 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
384 power ? "ON" : "OFF");
385 goto exit;
386 }
387
388 if (power) {
389 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
390 dac33->supplies);
391 if (ret != 0) {
392 dev_err(codec->dev,
393 "Failed to enable supplies: %d\n", ret);
394 goto exit;
395 }
396
397 if (dac33->power_gpio >= 0)
398 gpio_set_value(dac33->power_gpio, 1);
399
400 dac33->chip_power = 1;
401 } else {
402 dac33_soft_power(codec, 0);
403 if (dac33->power_gpio >= 0)
404 gpio_set_value(dac33->power_gpio, 0);
405
406 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
407 dac33->supplies);
408 if (ret != 0) {
409 dev_err(codec->dev,
410 "Failed to disable supplies: %d\n", ret);
411 goto exit;
412 }
413
414 dac33->chip_power = 0;
415 }
416
417 exit:
418 mutex_unlock(&dac33->mutex);
419 return ret;
420 }
421
422 static int dac33_playback_event(struct snd_soc_dapm_widget *w,
423 struct snd_kcontrol *kcontrol, int event)
424 {
425 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec);
426
427 switch (event) {
428 case SND_SOC_DAPM_PRE_PMU:
429 if (likely(dac33->substream)) {
430 dac33_calculate_times(dac33->substream);
431 dac33_prepare_chip(dac33->substream);
432 }
433 break;
434 case SND_SOC_DAPM_POST_PMD:
435 dac33_disable_digital(w->codec);
436 break;
437 }
438 return 0;
439 }
440
441 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
442 struct snd_ctl_elem_value *ucontrol)
443 {
444 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
445 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
446
447 ucontrol->value.integer.value[0] = dac33->fifo_mode;
448
449 return 0;
450 }
451
452 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
453 struct snd_ctl_elem_value *ucontrol)
454 {
455 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
456 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
457 int ret = 0;
458
459 if (dac33->fifo_mode == ucontrol->value.integer.value[0])
460 return 0;
461 /* Do not allow changes while stream is running*/
462 if (codec->active)
463 return -EPERM;
464
465 if (ucontrol->value.integer.value[0] < 0 ||
466 ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
467 ret = -EINVAL;
468 else
469 dac33->fifo_mode = ucontrol->value.integer.value[0];
470
471 return ret;
472 }
473
474 /* Codec operation modes */
475 static const char *dac33_fifo_mode_texts[] = {
476 "Bypass", "Mode 1", "Mode 7"
477 };
478
479 static const struct soc_enum dac33_fifo_mode_enum =
480 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
481 dac33_fifo_mode_texts);
482
483 /* L/R Line Output Gain */
484 static const char *lr_lineout_gain_texts[] = {
485 "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
486 "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
487 };
488
489 static const struct soc_enum l_lineout_gain_enum =
490 SOC_ENUM_SINGLE(DAC33_LDAC_PWR_CTRL, 0,
491 ARRAY_SIZE(lr_lineout_gain_texts),
492 lr_lineout_gain_texts);
493
494 static const struct soc_enum r_lineout_gain_enum =
495 SOC_ENUM_SINGLE(DAC33_RDAC_PWR_CTRL, 0,
496 ARRAY_SIZE(lr_lineout_gain_texts),
497 lr_lineout_gain_texts);
498
499 /*
500 * DACL/R digital volume control:
501 * from 0 dB to -63.5 in 0.5 dB steps
502 * Need to be inverted later on:
503 * 0x00 == 0 dB
504 * 0x7f == -63.5 dB
505 */
506 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
507
508 static const struct snd_kcontrol_new dac33_snd_controls[] = {
509 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
510 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
511 0, 0x7f, 1, dac_digivol_tlv),
512 SOC_DOUBLE_R("DAC Digital Playback Switch",
513 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
514 SOC_DOUBLE_R("Line to Line Out Volume",
515 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
516 SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
517 SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
518 };
519
520 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
521 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
522 dac33_get_fifo_mode, dac33_set_fifo_mode),
523 };
524
525 /* Analog bypass */
526 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
527 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
528
529 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
530 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
531
532 /* LOP L/R invert selection */
533 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
534
535 static const struct soc_enum dac33_left_lom_enum =
536 SOC_ENUM_SINGLE(DAC33_OUT_AMP_CTRL, 3,
537 ARRAY_SIZE(dac33_lr_lom_texts),
538 dac33_lr_lom_texts);
539
540 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
541 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
542
543 static const struct soc_enum dac33_right_lom_enum =
544 SOC_ENUM_SINGLE(DAC33_OUT_AMP_CTRL, 2,
545 ARRAY_SIZE(dac33_lr_lom_texts),
546 dac33_lr_lom_texts);
547
548 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
549 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
550
551 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
552 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
553 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
554
555 SND_SOC_DAPM_INPUT("LINEL"),
556 SND_SOC_DAPM_INPUT("LINER"),
557
558 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
559 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
560
561 /* Analog bypass */
562 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
563 &dac33_dapm_abypassl_control),
564 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
565 &dac33_dapm_abypassr_control),
566
567 SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
568 &dac33_dapm_left_lom_control),
569 SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
570 &dac33_dapm_right_lom_control),
571 /*
572 * For DAPM path, when only the anlog bypass path is enabled, and the
573 * LOP inverted from the corresponding DAC side.
574 * This is needed, so we can attach the DAC power supply in this case.
575 */
576 SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
577 SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
578
579 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
580 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
581 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
582 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
583
584 SND_SOC_DAPM_SUPPLY("Left DAC Power",
585 DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
586 SND_SOC_DAPM_SUPPLY("Right DAC Power",
587 DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
588
589 SND_SOC_DAPM_SUPPLY("Codec Power",
590 DAC33_PWR_CTRL, 4, 0, NULL, 0),
591
592 SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
593 SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
594 };
595
596 static const struct snd_soc_dapm_route audio_map[] = {
597 /* Analog bypass */
598 {"Analog Left Bypass", "Switch", "LINEL"},
599 {"Analog Right Bypass", "Switch", "LINER"},
600
601 {"Output Left Amplifier", NULL, "DACL"},
602 {"Output Right Amplifier", NULL, "DACR"},
603
604 {"Left Bypass PGA", NULL, "Analog Left Bypass"},
605 {"Right Bypass PGA", NULL, "Analog Right Bypass"},
606
607 {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
608 {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
609 {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
610 {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
611
612 {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
613 {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
614
615 {"DACL", NULL, "Left DAC Power"},
616 {"DACR", NULL, "Right DAC Power"},
617
618 {"Left Bypass PGA", NULL, "Left DAC Power"},
619 {"Right Bypass PGA", NULL, "Right DAC Power"},
620
621 /* output */
622 {"LEFT_LO", NULL, "Output Left Amplifier"},
623 {"RIGHT_LO", NULL, "Output Right Amplifier"},
624
625 {"LEFT_LO", NULL, "Codec Power"},
626 {"RIGHT_LO", NULL, "Codec Power"},
627 };
628
629 static int dac33_set_bias_level(struct snd_soc_codec *codec,
630 enum snd_soc_bias_level level)
631 {
632 int ret;
633
634 switch (level) {
635 case SND_SOC_BIAS_ON:
636 break;
637 case SND_SOC_BIAS_PREPARE:
638 break;
639 case SND_SOC_BIAS_STANDBY:
640 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
641 /* Coming from OFF, switch on the codec */
642 ret = dac33_hard_power(codec, 1);
643 if (ret != 0)
644 return ret;
645
646 dac33_init_chip(codec);
647 }
648 break;
649 case SND_SOC_BIAS_OFF:
650 /* Do not power off, when the codec is already off */
651 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
652 return 0;
653 ret = dac33_hard_power(codec, 0);
654 if (ret != 0)
655 return ret;
656 break;
657 }
658 codec->dapm.bias_level = level;
659
660 return 0;
661 }
662
663 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
664 {
665 struct snd_soc_codec *codec = dac33->codec;
666 unsigned int delay;
667 unsigned long flags;
668
669 switch (dac33->fifo_mode) {
670 case DAC33_FIFO_MODE1:
671 dac33_write16(codec, DAC33_NSAMPLE_MSB,
672 DAC33_THRREG(dac33->nsample));
673
674 /* Take the timestamps */
675 spin_lock_irqsave(&dac33->lock, flags);
676 dac33->t_stamp2 = ktime_to_us(ktime_get());
677 dac33->t_stamp1 = dac33->t_stamp2;
678 spin_unlock_irqrestore(&dac33->lock, flags);
679
680 dac33_write16(codec, DAC33_PREFILL_MSB,
681 DAC33_THRREG(dac33->alarm_threshold));
682 /* Enable Alarm Threshold IRQ with a delay */
683 delay = SAMPLES_TO_US(dac33->burst_rate,
684 dac33->alarm_threshold) + 1000;
685 usleep_range(delay, delay + 500);
686 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
687 break;
688 case DAC33_FIFO_MODE7:
689 /* Take the timestamp */
690 spin_lock_irqsave(&dac33->lock, flags);
691 dac33->t_stamp1 = ktime_to_us(ktime_get());
692 /* Move back the timestamp with drain time */
693 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
694 spin_unlock_irqrestore(&dac33->lock, flags);
695
696 dac33_write16(codec, DAC33_PREFILL_MSB,
697 DAC33_THRREG(DAC33_MODE7_MARGIN));
698
699 /* Enable Upper Threshold IRQ */
700 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
701 break;
702 default:
703 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
704 dac33->fifo_mode);
705 break;
706 }
707 }
708
709 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
710 {
711 struct snd_soc_codec *codec = dac33->codec;
712 unsigned long flags;
713
714 switch (dac33->fifo_mode) {
715 case DAC33_FIFO_MODE1:
716 /* Take the timestamp */
717 spin_lock_irqsave(&dac33->lock, flags);
718 dac33->t_stamp2 = ktime_to_us(ktime_get());
719 spin_unlock_irqrestore(&dac33->lock, flags);
720
721 dac33_write16(codec, DAC33_NSAMPLE_MSB,
722 DAC33_THRREG(dac33->nsample));
723 break;
724 case DAC33_FIFO_MODE7:
725 /* At the moment we are not using interrupts in mode7 */
726 break;
727 default:
728 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
729 dac33->fifo_mode);
730 break;
731 }
732 }
733
734 static void dac33_work(struct work_struct *work)
735 {
736 struct snd_soc_codec *codec;
737 struct tlv320dac33_priv *dac33;
738 u8 reg;
739
740 dac33 = container_of(work, struct tlv320dac33_priv, work);
741 codec = dac33->codec;
742
743 mutex_lock(&dac33->mutex);
744 switch (dac33->state) {
745 case DAC33_PREFILL:
746 dac33->state = DAC33_PLAYBACK;
747 dac33_prefill_handler(dac33);
748 break;
749 case DAC33_PLAYBACK:
750 dac33_playback_handler(dac33);
751 break;
752 case DAC33_IDLE:
753 break;
754 case DAC33_FLUSH:
755 dac33->state = DAC33_IDLE;
756 /* Mask all interrupts from dac33 */
757 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
758
759 /* flush fifo */
760 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
761 reg |= DAC33_FIFOFLUSH;
762 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
763 break;
764 }
765 mutex_unlock(&dac33->mutex);
766 }
767
768 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
769 {
770 struct snd_soc_codec *codec = dev;
771 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
772 unsigned long flags;
773
774 spin_lock_irqsave(&dac33->lock, flags);
775 dac33->t_stamp1 = ktime_to_us(ktime_get());
776 spin_unlock_irqrestore(&dac33->lock, flags);
777
778 /* Do not schedule the workqueue in Mode7 */
779 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
780 queue_work(dac33->dac33_wq, &dac33->work);
781
782 return IRQ_HANDLED;
783 }
784
785 static void dac33_oscwait(struct snd_soc_codec *codec)
786 {
787 int timeout = 60;
788 u8 reg;
789
790 do {
791 usleep_range(1000, 2000);
792 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
793 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
794 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
795 dev_err(codec->dev,
796 "internal oscillator calibration failed\n");
797 }
798
799 static int dac33_startup(struct snd_pcm_substream *substream,
800 struct snd_soc_dai *dai)
801 {
802 struct snd_soc_pcm_runtime *rtd = substream->private_data;
803 struct snd_soc_codec *codec = rtd->codec;
804 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
805
806 /* Stream started, save the substream pointer */
807 dac33->substream = substream;
808
809 return 0;
810 }
811
812 static void dac33_shutdown(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 dac33->substream = NULL;
820 }
821
822 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
823 (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
824 static int dac33_hw_params(struct snd_pcm_substream *substream,
825 struct snd_pcm_hw_params *params,
826 struct snd_soc_dai *dai)
827 {
828 struct snd_soc_pcm_runtime *rtd = substream->private_data;
829 struct snd_soc_codec *codec = rtd->codec;
830 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
831
832 /* Check parameters for validity */
833 switch (params_rate(params)) {
834 case 44100:
835 case 48000:
836 break;
837 default:
838 dev_err(codec->dev, "unsupported rate %d\n",
839 params_rate(params));
840 return -EINVAL;
841 }
842
843 switch (params_format(params)) {
844 case SNDRV_PCM_FORMAT_S16_LE:
845 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
846 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
847 break;
848 case SNDRV_PCM_FORMAT_S32_LE:
849 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
850 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
851 break;
852 default:
853 dev_err(codec->dev, "unsupported format %d\n",
854 params_format(params));
855 return -EINVAL;
856 }
857
858 return 0;
859 }
860
861 #define CALC_OSCSET(rate, refclk) ( \
862 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
863 #define CALC_RATIOSET(rate, refclk) ( \
864 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
865
866 /*
867 * tlv320dac33 is strict on the sequence of the register writes, if the register
868 * writes happens in different order, than dac33 might end up in unknown state.
869 * Use the known, working sequence of register writes to initialize the dac33.
870 */
871 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
872 {
873 struct snd_soc_pcm_runtime *rtd = substream->private_data;
874 struct snd_soc_codec *codec = rtd->codec;
875 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
876 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
877 u8 aictrl_a, aictrl_b, fifoctrl_a;
878
879 switch (substream->runtime->rate) {
880 case 44100:
881 case 48000:
882 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
883 ratioset = CALC_RATIOSET(substream->runtime->rate,
884 dac33->refclk);
885 break;
886 default:
887 dev_err(codec->dev, "unsupported rate %d\n",
888 substream->runtime->rate);
889 return -EINVAL;
890 }
891
892
893 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
894 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
895 /* Read FIFO control A, and clear FIFO flush bit */
896 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
897 fifoctrl_a &= ~DAC33_FIFOFLUSH;
898
899 fifoctrl_a &= ~DAC33_WIDTH;
900 switch (substream->runtime->format) {
901 case SNDRV_PCM_FORMAT_S16_LE:
902 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
903 fifoctrl_a |= DAC33_WIDTH;
904 break;
905 case SNDRV_PCM_FORMAT_S32_LE:
906 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
907 break;
908 default:
909 dev_err(codec->dev, "unsupported format %d\n",
910 substream->runtime->format);
911 return -EINVAL;
912 }
913
914 mutex_lock(&dac33->mutex);
915
916 if (!dac33->chip_power) {
917 /*
918 * Chip is not powered yet.
919 * Do the init in the dac33_set_bias_level later.
920 */
921 mutex_unlock(&dac33->mutex);
922 return 0;
923 }
924
925 dac33_soft_power(codec, 0);
926 dac33_soft_power(codec, 1);
927
928 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
929 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
930
931 /* Write registers 0x08 and 0x09 (MSB, LSB) */
932 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
933
934 /* OSC calibration time */
935 dac33_write(codec, DAC33_CALIB_TIME, 96);
936
937 /* adjustment treshold & step */
938 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
939 DAC33_ADJSTEP(1));
940
941 /* div=4 / gain=1 / div */
942 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
943
944 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
945 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
946 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
947
948 dac33_oscwait(codec);
949
950 if (dac33->fifo_mode) {
951 /* Generic for all FIFO modes */
952 /* 50-51 : ASRC Control registers */
953 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
954 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
955
956 /* Write registers 0x34 and 0x35 (MSB, LSB) */
957 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
958
959 /* Set interrupts to high active */
960 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
961 } else {
962 /* FIFO bypass mode */
963 /* 50-51 : ASRC Control registers */
964 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
965 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
966 }
967
968 /* Interrupt behaviour configuration */
969 switch (dac33->fifo_mode) {
970 case DAC33_FIFO_MODE1:
971 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
972 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
973 break;
974 case DAC33_FIFO_MODE7:
975 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
976 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
977 break;
978 default:
979 /* in FIFO bypass mode, the interrupts are not used */
980 break;
981 }
982
983 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
984
985 switch (dac33->fifo_mode) {
986 case DAC33_FIFO_MODE1:
987 /*
988 * For mode1:
989 * Disable the FIFO bypass (Enable the use of FIFO)
990 * Select nSample mode
991 * BCLK is only running when data is needed by DAC33
992 */
993 fifoctrl_a &= ~DAC33_FBYPAS;
994 fifoctrl_a &= ~DAC33_FAUTO;
995 if (dac33->keep_bclk)
996 aictrl_b |= DAC33_BCLKON;
997 else
998 aictrl_b &= ~DAC33_BCLKON;
999 break;
1000 case DAC33_FIFO_MODE7:
1001 /*
1002 * For mode1:
1003 * Disable the FIFO bypass (Enable the use of FIFO)
1004 * Select Threshold mode
1005 * BCLK is only running when data is needed by DAC33
1006 */
1007 fifoctrl_a &= ~DAC33_FBYPAS;
1008 fifoctrl_a |= DAC33_FAUTO;
1009 if (dac33->keep_bclk)
1010 aictrl_b |= DAC33_BCLKON;
1011 else
1012 aictrl_b &= ~DAC33_BCLKON;
1013 break;
1014 default:
1015 /*
1016 * For FIFO bypass mode:
1017 * Enable the FIFO bypass (Disable the FIFO use)
1018 * Set the BCLK as continuous
1019 */
1020 fifoctrl_a |= DAC33_FBYPAS;
1021 aictrl_b |= DAC33_BCLKON;
1022 break;
1023 }
1024
1025 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1026 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1027 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1028
1029 /*
1030 * BCLK divide ratio
1031 * 0: 1.5
1032 * 1: 1
1033 * 2: 2
1034 * ...
1035 * 254: 254
1036 * 255: 255
1037 */
1038 if (dac33->fifo_mode)
1039 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1040 dac33->burst_bclkdiv);
1041 else
1042 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1043 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1044 else
1045 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
1046
1047 switch (dac33->fifo_mode) {
1048 case DAC33_FIFO_MODE1:
1049 dac33_write16(codec, DAC33_ATHR_MSB,
1050 DAC33_THRREG(dac33->alarm_threshold));
1051 break;
1052 case DAC33_FIFO_MODE7:
1053 /*
1054 * Configure the threshold levels, and leave 10 sample space
1055 * at the bottom, and also at the top of the FIFO
1056 */
1057 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1058 dac33_write16(codec, DAC33_LTHR_MSB,
1059 DAC33_THRREG(DAC33_MODE7_MARGIN));
1060 break;
1061 default:
1062 break;
1063 }
1064
1065 mutex_unlock(&dac33->mutex);
1066
1067 return 0;
1068 }
1069
1070 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1071 {
1072 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1073 struct snd_soc_codec *codec = rtd->codec;
1074 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1075 unsigned int period_size = substream->runtime->period_size;
1076 unsigned int rate = substream->runtime->rate;
1077 unsigned int nsample_limit;
1078
1079 /* In bypass mode we don't need to calculate */
1080 if (!dac33->fifo_mode)
1081 return;
1082
1083 switch (dac33->fifo_mode) {
1084 case DAC33_FIFO_MODE1:
1085 /* Number of samples under i2c latency */
1086 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1087 dac33->mode1_latency);
1088 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1089
1090 if (period_size <= dac33->alarm_threshold)
1091 /*
1092 * Configure nSamaple to number of periods,
1093 * which covers the latency requironment.
1094 */
1095 dac33->nsample = period_size *
1096 ((dac33->alarm_threshold / period_size) +
1097 (dac33->alarm_threshold % period_size ?
1098 1 : 0));
1099 else if (period_size > nsample_limit)
1100 dac33->nsample = nsample_limit;
1101 else
1102 dac33->nsample = period_size;
1103
1104 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1105 dac33->nsample);
1106 dac33->t_stamp1 = 0;
1107 dac33->t_stamp2 = 0;
1108 break;
1109 case DAC33_FIFO_MODE7:
1110 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1111 dac33->burst_rate) + 9;
1112 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1113 dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1114 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1115 dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1116
1117 dac33->mode7_us_to_lthr =
1118 SAMPLES_TO_US(substream->runtime->rate,
1119 dac33->uthr - DAC33_MODE7_MARGIN + 1);
1120 dac33->t_stamp1 = 0;
1121 break;
1122 default:
1123 break;
1124 }
1125
1126 }
1127
1128 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1129 struct snd_soc_dai *dai)
1130 {
1131 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1132 struct snd_soc_codec *codec = rtd->codec;
1133 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1134 int ret = 0;
1135
1136 switch (cmd) {
1137 case SNDRV_PCM_TRIGGER_START:
1138 case SNDRV_PCM_TRIGGER_RESUME:
1139 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1140 if (dac33->fifo_mode) {
1141 dac33->state = DAC33_PREFILL;
1142 queue_work(dac33->dac33_wq, &dac33->work);
1143 }
1144 break;
1145 case SNDRV_PCM_TRIGGER_STOP:
1146 case SNDRV_PCM_TRIGGER_SUSPEND:
1147 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1148 if (dac33->fifo_mode) {
1149 dac33->state = DAC33_FLUSH;
1150 queue_work(dac33->dac33_wq, &dac33->work);
1151 }
1152 break;
1153 default:
1154 ret = -EINVAL;
1155 }
1156
1157 return ret;
1158 }
1159
1160 static snd_pcm_sframes_t dac33_dai_delay(
1161 struct snd_pcm_substream *substream,
1162 struct snd_soc_dai *dai)
1163 {
1164 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1165 struct snd_soc_codec *codec = rtd->codec;
1166 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1167 unsigned long long t0, t1, t_now;
1168 unsigned int time_delta, uthr;
1169 int samples_out, samples_in, samples;
1170 snd_pcm_sframes_t delay = 0;
1171 unsigned long flags;
1172
1173 switch (dac33->fifo_mode) {
1174 case DAC33_FIFO_BYPASS:
1175 break;
1176 case DAC33_FIFO_MODE1:
1177 spin_lock_irqsave(&dac33->lock, flags);
1178 t0 = dac33->t_stamp1;
1179 t1 = dac33->t_stamp2;
1180 spin_unlock_irqrestore(&dac33->lock, flags);
1181 t_now = ktime_to_us(ktime_get());
1182
1183 /* We have not started to fill the FIFO yet, delay is 0 */
1184 if (!t1)
1185 goto out;
1186
1187 if (t0 > t1) {
1188 /*
1189 * Phase 1:
1190 * After Alarm threshold, and before nSample write
1191 */
1192 time_delta = t_now - t0;
1193 samples_out = time_delta ? US_TO_SAMPLES(
1194 substream->runtime->rate,
1195 time_delta) : 0;
1196
1197 if (likely(dac33->alarm_threshold > samples_out))
1198 delay = dac33->alarm_threshold - samples_out;
1199 else
1200 delay = 0;
1201 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1202 /*
1203 * Phase 2:
1204 * After nSample write (during burst operation)
1205 */
1206 time_delta = t_now - t0;
1207 samples_out = time_delta ? US_TO_SAMPLES(
1208 substream->runtime->rate,
1209 time_delta) : 0;
1210
1211 time_delta = t_now - t1;
1212 samples_in = time_delta ? US_TO_SAMPLES(
1213 dac33->burst_rate,
1214 time_delta) : 0;
1215
1216 samples = dac33->alarm_threshold;
1217 samples += (samples_in - samples_out);
1218
1219 if (likely(samples > 0))
1220 delay = samples;
1221 else
1222 delay = 0;
1223 } else {
1224 /*
1225 * Phase 3:
1226 * After burst operation, before next alarm threshold
1227 */
1228 time_delta = t_now - t0;
1229 samples_out = time_delta ? US_TO_SAMPLES(
1230 substream->runtime->rate,
1231 time_delta) : 0;
1232
1233 samples_in = dac33->nsample;
1234 samples = dac33->alarm_threshold;
1235 samples += (samples_in - samples_out);
1236
1237 if (likely(samples > 0))
1238 delay = samples > dac33->fifo_size ?
1239 dac33->fifo_size : samples;
1240 else
1241 delay = 0;
1242 }
1243 break;
1244 case DAC33_FIFO_MODE7:
1245 spin_lock_irqsave(&dac33->lock, flags);
1246 t0 = dac33->t_stamp1;
1247 uthr = dac33->uthr;
1248 spin_unlock_irqrestore(&dac33->lock, flags);
1249 t_now = ktime_to_us(ktime_get());
1250
1251 /* We have not started to fill the FIFO yet, delay is 0 */
1252 if (!t0)
1253 goto out;
1254
1255 if (t_now <= t0) {
1256 /*
1257 * Either the timestamps are messed or equal. Report
1258 * maximum delay
1259 */
1260 delay = uthr;
1261 goto out;
1262 }
1263
1264 time_delta = t_now - t0;
1265 if (time_delta <= dac33->mode7_us_to_lthr) {
1266 /*
1267 * Phase 1:
1268 * After burst (draining phase)
1269 */
1270 samples_out = US_TO_SAMPLES(
1271 substream->runtime->rate,
1272 time_delta);
1273
1274 if (likely(uthr > samples_out))
1275 delay = uthr - samples_out;
1276 else
1277 delay = 0;
1278 } else {
1279 /*
1280 * Phase 2:
1281 * During burst operation
1282 */
1283 time_delta = time_delta - dac33->mode7_us_to_lthr;
1284
1285 samples_out = US_TO_SAMPLES(
1286 substream->runtime->rate,
1287 time_delta);
1288 samples_in = US_TO_SAMPLES(
1289 dac33->burst_rate,
1290 time_delta);
1291 delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1292
1293 if (unlikely(delay > uthr))
1294 delay = uthr;
1295 }
1296 break;
1297 default:
1298 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1299 dac33->fifo_mode);
1300 break;
1301 }
1302 out:
1303 return delay;
1304 }
1305
1306 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1307 int clk_id, unsigned int freq, int dir)
1308 {
1309 struct snd_soc_codec *codec = codec_dai->codec;
1310 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1311 u8 ioc_reg, asrcb_reg;
1312
1313 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1314 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1315 switch (clk_id) {
1316 case TLV320DAC33_MCLK:
1317 ioc_reg |= DAC33_REFSEL;
1318 asrcb_reg |= DAC33_SRCREFSEL;
1319 break;
1320 case TLV320DAC33_SLEEPCLK:
1321 ioc_reg &= ~DAC33_REFSEL;
1322 asrcb_reg &= ~DAC33_SRCREFSEL;
1323 break;
1324 default:
1325 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1326 break;
1327 }
1328 dac33->refclk = freq;
1329
1330 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1331 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1332
1333 return 0;
1334 }
1335
1336 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1337 unsigned int fmt)
1338 {
1339 struct snd_soc_codec *codec = codec_dai->codec;
1340 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1341 u8 aictrl_a, aictrl_b;
1342
1343 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1344 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1345 /* set master/slave audio interface */
1346 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1347 case SND_SOC_DAIFMT_CBM_CFM:
1348 /* Codec Master */
1349 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1350 break;
1351 case SND_SOC_DAIFMT_CBS_CFS:
1352 /* Codec Slave */
1353 if (dac33->fifo_mode) {
1354 dev_err(codec->dev, "FIFO mode requires master mode\n");
1355 return -EINVAL;
1356 } else
1357 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1358 break;
1359 default:
1360 return -EINVAL;
1361 }
1362
1363 aictrl_a &= ~DAC33_AFMT_MASK;
1364 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1365 case SND_SOC_DAIFMT_I2S:
1366 aictrl_a |= DAC33_AFMT_I2S;
1367 break;
1368 case SND_SOC_DAIFMT_DSP_A:
1369 aictrl_a |= DAC33_AFMT_DSP;
1370 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1371 aictrl_b |= DAC33_DATA_DELAY(0);
1372 break;
1373 case SND_SOC_DAIFMT_RIGHT_J:
1374 aictrl_a |= DAC33_AFMT_RIGHT_J;
1375 break;
1376 case SND_SOC_DAIFMT_LEFT_J:
1377 aictrl_a |= DAC33_AFMT_LEFT_J;
1378 break;
1379 default:
1380 dev_err(codec->dev, "Unsupported format (%u)\n",
1381 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1382 return -EINVAL;
1383 }
1384
1385 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1386 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1387
1388 return 0;
1389 }
1390
1391 static int dac33_soc_probe(struct snd_soc_codec *codec)
1392 {
1393 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1394 int ret = 0;
1395
1396 codec->control_data = dac33->control_data;
1397 codec->hw_write = (hw_write_t) i2c_master_send;
1398 codec->dapm.idle_bias_off = 1;
1399 dac33->codec = codec;
1400
1401 /* Read the tlv320dac33 ID registers */
1402 ret = dac33_hard_power(codec, 1);
1403 if (ret != 0) {
1404 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1405 goto err_power;
1406 }
1407 ret = dac33_read_id(codec);
1408 dac33_hard_power(codec, 0);
1409
1410 if (ret < 0) {
1411 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1412 ret = -ENODEV;
1413 goto err_power;
1414 }
1415
1416 /* Check if the IRQ number is valid and request it */
1417 if (dac33->irq >= 0) {
1418 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1419 IRQF_TRIGGER_RISING,
1420 codec->name, codec);
1421 if (ret < 0) {
1422 dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1423 dac33->irq, ret);
1424 dac33->irq = -1;
1425 }
1426 if (dac33->irq != -1) {
1427 /* Setup work queue */
1428 dac33->dac33_wq =
1429 create_singlethread_workqueue("tlv320dac33");
1430 if (dac33->dac33_wq == NULL) {
1431 free_irq(dac33->irq, codec);
1432 return -ENOMEM;
1433 }
1434
1435 INIT_WORK(&dac33->work, dac33_work);
1436 }
1437 }
1438
1439 /* Only add the FIFO controls, if we have valid IRQ number */
1440 if (dac33->irq >= 0)
1441 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1442 ARRAY_SIZE(dac33_mode_snd_controls));
1443
1444 err_power:
1445 return ret;
1446 }
1447
1448 static int dac33_soc_remove(struct snd_soc_codec *codec)
1449 {
1450 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1451
1452 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1453
1454 if (dac33->irq >= 0) {
1455 free_irq(dac33->irq, dac33->codec);
1456 destroy_workqueue(dac33->dac33_wq);
1457 }
1458 return 0;
1459 }
1460
1461 static int dac33_soc_suspend(struct snd_soc_codec *codec)
1462 {
1463 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1464
1465 return 0;
1466 }
1467
1468 static int dac33_soc_resume(struct snd_soc_codec *codec)
1469 {
1470 dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1471
1472 return 0;
1473 }
1474
1475 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1476 .read = dac33_read_reg_cache,
1477 .write = dac33_write_locked,
1478 .set_bias_level = dac33_set_bias_level,
1479 .reg_cache_size = ARRAY_SIZE(dac33_reg),
1480 .reg_word_size = sizeof(u8),
1481 .reg_cache_default = dac33_reg,
1482 .probe = dac33_soc_probe,
1483 .remove = dac33_soc_remove,
1484 .suspend = dac33_soc_suspend,
1485 .resume = dac33_soc_resume,
1486
1487 .controls = dac33_snd_controls,
1488 .num_controls = ARRAY_SIZE(dac33_snd_controls),
1489 .dapm_widgets = dac33_dapm_widgets,
1490 .num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets),
1491 .dapm_routes = audio_map,
1492 .num_dapm_routes = ARRAY_SIZE(audio_map),
1493 };
1494
1495 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1496 SNDRV_PCM_RATE_48000)
1497 #define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1498
1499 static const struct snd_soc_dai_ops dac33_dai_ops = {
1500 .startup = dac33_startup,
1501 .shutdown = dac33_shutdown,
1502 .hw_params = dac33_hw_params,
1503 .trigger = dac33_pcm_trigger,
1504 .delay = dac33_dai_delay,
1505 .set_sysclk = dac33_set_dai_sysclk,
1506 .set_fmt = dac33_set_dai_fmt,
1507 };
1508
1509 static struct snd_soc_dai_driver dac33_dai = {
1510 .name = "tlv320dac33-hifi",
1511 .playback = {
1512 .stream_name = "Playback",
1513 .channels_min = 2,
1514 .channels_max = 2,
1515 .rates = DAC33_RATES,
1516 .formats = DAC33_FORMATS,
1517 .sig_bits = 24,
1518 },
1519 .ops = &dac33_dai_ops,
1520 };
1521
1522 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1523 const struct i2c_device_id *id)
1524 {
1525 struct tlv320dac33_platform_data *pdata;
1526 struct tlv320dac33_priv *dac33;
1527 int ret, i;
1528
1529 if (client->dev.platform_data == NULL) {
1530 dev_err(&client->dev, "Platform data not set\n");
1531 return -ENODEV;
1532 }
1533 pdata = client->dev.platform_data;
1534
1535 dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
1536 GFP_KERNEL);
1537 if (dac33 == NULL)
1538 return -ENOMEM;
1539
1540 dac33->control_data = client;
1541 mutex_init(&dac33->mutex);
1542 spin_lock_init(&dac33->lock);
1543
1544 i2c_set_clientdata(client, dac33);
1545
1546 dac33->power_gpio = pdata->power_gpio;
1547 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1548 dac33->keep_bclk = pdata->keep_bclk;
1549 dac33->mode1_latency = pdata->mode1_latency;
1550 if (!dac33->mode1_latency)
1551 dac33->mode1_latency = 10000; /* 10ms */
1552 dac33->irq = client->irq;
1553 /* Disable FIFO use by default */
1554 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1555
1556 /* Check if the reset GPIO number is valid and request it */
1557 if (dac33->power_gpio >= 0) {
1558 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1559 if (ret < 0) {
1560 dev_err(&client->dev,
1561 "Failed to request reset GPIO (%d)\n",
1562 dac33->power_gpio);
1563 goto err_gpio;
1564 }
1565 gpio_direction_output(dac33->power_gpio, 0);
1566 }
1567
1568 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1569 dac33->supplies[i].supply = dac33_supply_names[i];
1570
1571 ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1572 dac33->supplies);
1573
1574 if (ret != 0) {
1575 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1576 goto err_get;
1577 }
1578
1579 ret = snd_soc_register_codec(&client->dev,
1580 &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1581 if (ret < 0)
1582 goto err_register;
1583
1584 return ret;
1585 err_register:
1586 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1587 err_get:
1588 if (dac33->power_gpio >= 0)
1589 gpio_free(dac33->power_gpio);
1590 err_gpio:
1591 return ret;
1592 }
1593
1594 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1595 {
1596 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1597
1598 if (unlikely(dac33->chip_power))
1599 dac33_hard_power(dac33->codec, 0);
1600
1601 if (dac33->power_gpio >= 0)
1602 gpio_free(dac33->power_gpio);
1603
1604 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1605
1606 snd_soc_unregister_codec(&client->dev);
1607 return 0;
1608 }
1609
1610 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1611 {
1612 .name = "tlv320dac33",
1613 .driver_data = 0,
1614 },
1615 { },
1616 };
1617 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1618
1619 static struct i2c_driver tlv320dac33_i2c_driver = {
1620 .driver = {
1621 .name = "tlv320dac33-codec",
1622 .owner = THIS_MODULE,
1623 },
1624 .probe = dac33_i2c_probe,
1625 .remove = __devexit_p(dac33_i2c_remove),
1626 .id_table = tlv320dac33_i2c_id,
1627 };
1628
1629 static int __init dac33_module_init(void)
1630 {
1631 int r;
1632 r = i2c_add_driver(&tlv320dac33_i2c_driver);
1633 if (r < 0) {
1634 printk(KERN_ERR "DAC33: driver registration failed\n");
1635 return r;
1636 }
1637 return 0;
1638 }
1639 module_init(dac33_module_init);
1640
1641 static void __exit dac33_module_exit(void)
1642 {
1643 i2c_del_driver(&tlv320dac33_i2c_driver);
1644 }
1645 module_exit(dac33_module_exit);
1646
1647
1648 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1649 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1650 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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