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[linux-2.6.git] / sound / soc / codecs / tlv320dac33.c
blob00b6d87e7bdb9d6e9eb2fe6a0a9299e3c6d6999d
1 /*
2 * ALSA SoC Texas Instruments TLV320DAC33 codec driver
3 *
4 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
5 *
6 * Copyright: (C) 2009 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/pm.h>
29 #include <linux/i2c.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/gpio.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/slab.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/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 }
328
329 static inline int dac33_read_id(struct snd_soc_codec *codec)
330 {
331 int i, ret = 0;
332 u8 reg;
333
334 for (i = 0; i < 3; i++) {
335 ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, &reg);
336 if (ret < 0)
337 break;
338 }
339
340 return ret;
341 }
342
343 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
344 {
345 u8 reg;
346
347 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
348 if (power)
349 reg |= DAC33_PDNALLB;
350 else
351 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
352 DAC33_DACRPDNB | DAC33_DACLPDNB);
353 dac33_write(codec, DAC33_PWR_CTRL, reg);
354 }
355
356 static inline void dac33_disable_digital(struct snd_soc_codec *codec)
357 {
358 u8 reg;
359
360 /* Stop the DAI clock */
361 reg = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
362 reg &= ~DAC33_BCLKON;
363 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg);
364
365 /* Power down the Oscillator, and DACs */
366 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
367 reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
368 dac33_write(codec, DAC33_PWR_CTRL, reg);
369 }
370
371 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
372 {
373 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
374 int ret = 0;
375
376 mutex_lock(&dac33->mutex);
377
378 /* Safety check */
379 if (unlikely(power == dac33->chip_power)) {
380 dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
381 power ? "ON" : "OFF");
382 goto exit;
383 }
384
385 if (power) {
386 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
387 dac33->supplies);
388 if (ret != 0) {
389 dev_err(codec->dev,
390 "Failed to enable supplies: %d\n", ret);
391 goto exit;
392 }
393
394 if (dac33->power_gpio >= 0)
395 gpio_set_value(dac33->power_gpio, 1);
396
397 dac33->chip_power = 1;
398 } else {
399 dac33_soft_power(codec, 0);
400 if (dac33->power_gpio >= 0)
401 gpio_set_value(dac33->power_gpio, 0);
402
403 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
404 dac33->supplies);
405 if (ret != 0) {
406 dev_err(codec->dev,
407 "Failed to disable supplies: %d\n", ret);
408 goto exit;
409 }
410
411 dac33->chip_power = 0;
412 }
413
414 exit:
415 mutex_unlock(&dac33->mutex);
416 return ret;
417 }
418
419 static int dac33_playback_event(struct snd_soc_dapm_widget *w,
420 struct snd_kcontrol *kcontrol, int event)
421 {
422 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(w->codec);
423
424 switch (event) {
425 case SND_SOC_DAPM_PRE_PMU:
426 if (likely(dac33->substream)) {
427 dac33_calculate_times(dac33->substream);
428 dac33_prepare_chip(dac33->substream);
429 }
430 break;
431 case SND_SOC_DAPM_POST_PMD:
432 dac33_disable_digital(w->codec);
433 break;
434 }
435 return 0;
436 }
437
438 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
439 struct snd_ctl_elem_value *ucontrol)
440 {
441 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
442 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
443
444 ucontrol->value.integer.value[0] = dac33->fifo_mode;
445
446 return 0;
447 }
448
449 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
450 struct snd_ctl_elem_value *ucontrol)
451 {
452 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
453 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
454 int ret = 0;
455
456 if (dac33->fifo_mode == ucontrol->value.integer.value[0])
457 return 0;
458 /* Do not allow changes while stream is running*/
459 if (codec->active)
460 return -EPERM;
461
462 if (ucontrol->value.integer.value[0] < 0 ||
463 ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
464 ret = -EINVAL;
465 else
466 dac33->fifo_mode = ucontrol->value.integer.value[0];
467
468 return ret;
469 }
470
471 /* Codec operation modes */
472 static const char *dac33_fifo_mode_texts[] = {
473 "Bypass", "Mode 1", "Mode 7"
474 };
475
476 static const struct soc_enum dac33_fifo_mode_enum =
477 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
478 dac33_fifo_mode_texts);
479
480 /* L/R Line Output Gain */
481 static const char *lr_lineout_gain_texts[] = {
482 "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
483 "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
484 };
485
486 static const struct soc_enum l_lineout_gain_enum =
487 SOC_ENUM_SINGLE(DAC33_LDAC_PWR_CTRL, 0,
488 ARRAY_SIZE(lr_lineout_gain_texts),
489 lr_lineout_gain_texts);
490
491 static const struct soc_enum r_lineout_gain_enum =
492 SOC_ENUM_SINGLE(DAC33_RDAC_PWR_CTRL, 0,
493 ARRAY_SIZE(lr_lineout_gain_texts),
494 lr_lineout_gain_texts);
495
496 /*
497 * DACL/R digital volume control:
498 * from 0 dB to -63.5 in 0.5 dB steps
499 * Need to be inverted later on:
500 * 0x00 == 0 dB
501 * 0x7f == -63.5 dB
502 */
503 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
504
505 static const struct snd_kcontrol_new dac33_snd_controls[] = {
506 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
507 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
508 0, 0x7f, 1, dac_digivol_tlv),
509 SOC_DOUBLE_R("DAC Digital Playback Switch",
510 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
511 SOC_DOUBLE_R("Line to Line Out Volume",
512 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
513 SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
514 SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
515 };
516
517 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
518 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
519 dac33_get_fifo_mode, dac33_set_fifo_mode),
520 };
521
522 /* Analog bypass */
523 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
524 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
525
526 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
527 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
528
529 /* LOP L/R invert selection */
530 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
531
532 static const struct soc_enum dac33_left_lom_enum =
533 SOC_ENUM_SINGLE(DAC33_OUT_AMP_CTRL, 3,
534 ARRAY_SIZE(dac33_lr_lom_texts),
535 dac33_lr_lom_texts);
536
537 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
538 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
539
540 static const struct soc_enum dac33_right_lom_enum =
541 SOC_ENUM_SINGLE(DAC33_OUT_AMP_CTRL, 2,
542 ARRAY_SIZE(dac33_lr_lom_texts),
543 dac33_lr_lom_texts);
544
545 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
546 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
547
548 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
549 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
550 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
551
552 SND_SOC_DAPM_INPUT("LINEL"),
553 SND_SOC_DAPM_INPUT("LINER"),
554
555 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
556 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
557
558 /* Analog bypass */
559 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
560 &dac33_dapm_abypassl_control),
561 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
562 &dac33_dapm_abypassr_control),
563
564 SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
565 &dac33_dapm_left_lom_control),
566 SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
567 &dac33_dapm_right_lom_control),
568 /*
569 * For DAPM path, when only the anlog bypass path is enabled, and the
570 * LOP inverted from the corresponding DAC side.
571 * This is needed, so we can attach the DAC power supply in this case.
572 */
573 SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
574 SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
575
576 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
577 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
578 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
579 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
580
581 SND_SOC_DAPM_SUPPLY("Left DAC Power",
582 DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
583 SND_SOC_DAPM_SUPPLY("Right DAC Power",
584 DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
585
586 SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
587 SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
588 };
589
590 static const struct snd_soc_dapm_route audio_map[] = {
591 /* Analog bypass */
592 {"Analog Left Bypass", "Switch", "LINEL"},
593 {"Analog Right Bypass", "Switch", "LINER"},
594
595 {"Output Left Amplifier", NULL, "DACL"},
596 {"Output Right Amplifier", NULL, "DACR"},
597
598 {"Left Bypass PGA", NULL, "Analog Left Bypass"},
599 {"Right Bypass PGA", NULL, "Analog Right Bypass"},
600
601 {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
602 {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
603 {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
604 {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
605
606 {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
607 {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
608
609 {"DACL", NULL, "Left DAC Power"},
610 {"DACR", NULL, "Right DAC Power"},
611
612 {"Left Bypass PGA", NULL, "Left DAC Power"},
613 {"Right Bypass PGA", NULL, "Right DAC Power"},
614
615 /* output */
616 {"LEFT_LO", NULL, "Output Left Amplifier"},
617 {"RIGHT_LO", NULL, "Output Right Amplifier"},
618 };
619
620 static int dac33_add_widgets(struct snd_soc_codec *codec)
621 {
622 struct snd_soc_dapm_context *dapm = &codec->dapm;
623
624 snd_soc_dapm_new_controls(dapm, dac33_dapm_widgets,
625 ARRAY_SIZE(dac33_dapm_widgets));
626 /* set up audio path interconnects */
627 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
628
629 return 0;
630 }
631
632 static int dac33_set_bias_level(struct snd_soc_codec *codec,
633 enum snd_soc_bias_level level)
634 {
635 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
636 int ret;
637
638 switch (level) {
639 case SND_SOC_BIAS_ON:
640 if (!dac33->substream)
641 dac33_soft_power(codec, 1);
642 break;
643 case SND_SOC_BIAS_PREPARE:
644 break;
645 case SND_SOC_BIAS_STANDBY:
646 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
647 /* Coming from OFF, switch on the codec */
648 ret = dac33_hard_power(codec, 1);
649 if (ret != 0)
650 return ret;
651
652 dac33_init_chip(codec);
653 }
654 break;
655 case SND_SOC_BIAS_OFF:
656 /* Do not power off, when the codec is already off */
657 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
658 return 0;
659 ret = dac33_hard_power(codec, 0);
660 if (ret != 0)
661 return ret;
662 break;
663 }
664 codec->dapm.bias_level = level;
665
666 return 0;
667 }
668
669 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
670 {
671 struct snd_soc_codec *codec = dac33->codec;
672 unsigned int delay;
673
674 switch (dac33->fifo_mode) {
675 case DAC33_FIFO_MODE1:
676 dac33_write16(codec, DAC33_NSAMPLE_MSB,
677 DAC33_THRREG(dac33->nsample));
678
679 /* Take the timestamps */
680 spin_lock_irq(&dac33->lock);
681 dac33->t_stamp2 = ktime_to_us(ktime_get());
682 dac33->t_stamp1 = dac33->t_stamp2;
683 spin_unlock_irq(&dac33->lock);
684
685 dac33_write16(codec, DAC33_PREFILL_MSB,
686 DAC33_THRREG(dac33->alarm_threshold));
687 /* Enable Alarm Threshold IRQ with a delay */
688 delay = SAMPLES_TO_US(dac33->burst_rate,
689 dac33->alarm_threshold) + 1000;
690 usleep_range(delay, delay + 500);
691 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
692 break;
693 case DAC33_FIFO_MODE7:
694 /* Take the timestamp */
695 spin_lock_irq(&dac33->lock);
696 dac33->t_stamp1 = ktime_to_us(ktime_get());
697 /* Move back the timestamp with drain time */
698 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
699 spin_unlock_irq(&dac33->lock);
700
701 dac33_write16(codec, DAC33_PREFILL_MSB,
702 DAC33_THRREG(DAC33_MODE7_MARGIN));
703
704 /* Enable Upper Threshold IRQ */
705 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
706 break;
707 default:
708 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
709 dac33->fifo_mode);
710 break;
711 }
712 }
713
714 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
715 {
716 struct snd_soc_codec *codec = dac33->codec;
717
718 switch (dac33->fifo_mode) {
719 case DAC33_FIFO_MODE1:
720 /* Take the timestamp */
721 spin_lock_irq(&dac33->lock);
722 dac33->t_stamp2 = ktime_to_us(ktime_get());
723 spin_unlock_irq(&dac33->lock);
724
725 dac33_write16(codec, DAC33_NSAMPLE_MSB,
726 DAC33_THRREG(dac33->nsample));
727 break;
728 case DAC33_FIFO_MODE7:
729 /* At the moment we are not using interrupts in mode7 */
730 break;
731 default:
732 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
733 dac33->fifo_mode);
734 break;
735 }
736 }
737
738 static void dac33_work(struct work_struct *work)
739 {
740 struct snd_soc_codec *codec;
741 struct tlv320dac33_priv *dac33;
742 u8 reg;
743
744 dac33 = container_of(work, struct tlv320dac33_priv, work);
745 codec = dac33->codec;
746
747 mutex_lock(&dac33->mutex);
748 switch (dac33->state) {
749 case DAC33_PREFILL:
750 dac33->state = DAC33_PLAYBACK;
751 dac33_prefill_handler(dac33);
752 break;
753 case DAC33_PLAYBACK:
754 dac33_playback_handler(dac33);
755 break;
756 case DAC33_IDLE:
757 break;
758 case DAC33_FLUSH:
759 dac33->state = DAC33_IDLE;
760 /* Mask all interrupts from dac33 */
761 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
762
763 /* flush fifo */
764 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
765 reg |= DAC33_FIFOFLUSH;
766 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
767 break;
768 }
769 mutex_unlock(&dac33->mutex);
770 }
771
772 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
773 {
774 struct snd_soc_codec *codec = dev;
775 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
776
777 spin_lock(&dac33->lock);
778 dac33->t_stamp1 = ktime_to_us(ktime_get());
779 spin_unlock(&dac33->lock);
780
781 /* Do not schedule the workqueue in Mode7 */
782 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
783 queue_work(dac33->dac33_wq, &dac33->work);
784
785 return IRQ_HANDLED;
786 }
787
788 static void dac33_oscwait(struct snd_soc_codec *codec)
789 {
790 int timeout = 60;
791 u8 reg;
792
793 do {
794 usleep_range(1000, 2000);
795 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
796 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
797 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
798 dev_err(codec->dev,
799 "internal oscillator calibration failed\n");
800 }
801
802 static int dac33_startup(struct snd_pcm_substream *substream,
803 struct snd_soc_dai *dai)
804 {
805 struct snd_soc_pcm_runtime *rtd = substream->private_data;
806 struct snd_soc_codec *codec = rtd->codec;
807 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
808
809 /* Stream started, save the substream pointer */
810 dac33->substream = substream;
811
812 snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
813
814 return 0;
815 }
816
817 static void dac33_shutdown(struct snd_pcm_substream *substream,
818 struct snd_soc_dai *dai)
819 {
820 struct snd_soc_pcm_runtime *rtd = substream->private_data;
821 struct snd_soc_codec *codec = rtd->codec;
822 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
823
824 dac33->substream = NULL;
825 }
826
827 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
828 (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
829 static int dac33_hw_params(struct snd_pcm_substream *substream,
830 struct snd_pcm_hw_params *params,
831 struct snd_soc_dai *dai)
832 {
833 struct snd_soc_pcm_runtime *rtd = substream->private_data;
834 struct snd_soc_codec *codec = rtd->codec;
835 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
836
837 /* Check parameters for validity */
838 switch (params_rate(params)) {
839 case 44100:
840 case 48000:
841 break;
842 default:
843 dev_err(codec->dev, "unsupported rate %d\n",
844 params_rate(params));
845 return -EINVAL;
846 }
847
848 switch (params_format(params)) {
849 case SNDRV_PCM_FORMAT_S16_LE:
850 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
851 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
852 break;
853 case SNDRV_PCM_FORMAT_S32_LE:
854 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
855 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
856 break;
857 default:
858 dev_err(codec->dev, "unsupported format %d\n",
859 params_format(params));
860 return -EINVAL;
861 }
862
863 return 0;
864 }
865
866 #define CALC_OSCSET(rate, refclk) ( \
867 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
868 #define CALC_RATIOSET(rate, refclk) ( \
869 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
870
871 /*
872 * tlv320dac33 is strict on the sequence of the register writes, if the register
873 * writes happens in different order, than dac33 might end up in unknown state.
874 * Use the known, working sequence of register writes to initialize the dac33.
875 */
876 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
877 {
878 struct snd_soc_pcm_runtime *rtd = substream->private_data;
879 struct snd_soc_codec *codec = rtd->codec;
880 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
881 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
882 u8 aictrl_a, aictrl_b, fifoctrl_a;
883
884 switch (substream->runtime->rate) {
885 case 44100:
886 case 48000:
887 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
888 ratioset = CALC_RATIOSET(substream->runtime->rate,
889 dac33->refclk);
890 break;
891 default:
892 dev_err(codec->dev, "unsupported rate %d\n",
893 substream->runtime->rate);
894 return -EINVAL;
895 }
896
897
898 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
899 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
900 /* Read FIFO control A, and clear FIFO flush bit */
901 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
902 fifoctrl_a &= ~DAC33_FIFOFLUSH;
903
904 fifoctrl_a &= ~DAC33_WIDTH;
905 switch (substream->runtime->format) {
906 case SNDRV_PCM_FORMAT_S16_LE:
907 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
908 fifoctrl_a |= DAC33_WIDTH;
909 break;
910 case SNDRV_PCM_FORMAT_S32_LE:
911 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
912 break;
913 default:
914 dev_err(codec->dev, "unsupported format %d\n",
915 substream->runtime->format);
916 return -EINVAL;
917 }
918
919 mutex_lock(&dac33->mutex);
920
921 if (!dac33->chip_power) {
922 /*
923 * Chip is not powered yet.
924 * Do the init in the dac33_set_bias_level later.
925 */
926 mutex_unlock(&dac33->mutex);
927 return 0;
928 }
929
930 dac33_soft_power(codec, 0);
931 dac33_soft_power(codec, 1);
932
933 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
934 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
935
936 /* Write registers 0x08 and 0x09 (MSB, LSB) */
937 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
938
939 /* calib time: 128 is a nice number ;) */
940 dac33_write(codec, DAC33_CALIB_TIME, 128);
941
942 /* adjustment treshold & step */
943 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
944 DAC33_ADJSTEP(1));
945
946 /* div=4 / gain=1 / div */
947 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
948
949 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
950 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
951 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
952
953 dac33_oscwait(codec);
954
955 if (dac33->fifo_mode) {
956 /* Generic for all FIFO modes */
957 /* 50-51 : ASRC Control registers */
958 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
959 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
960
961 /* Write registers 0x34 and 0x35 (MSB, LSB) */
962 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
963
964 /* Set interrupts to high active */
965 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
966 } else {
967 /* FIFO bypass mode */
968 /* 50-51 : ASRC Control registers */
969 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
970 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
971 }
972
973 /* Interrupt behaviour configuration */
974 switch (dac33->fifo_mode) {
975 case DAC33_FIFO_MODE1:
976 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
977 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
978 break;
979 case DAC33_FIFO_MODE7:
980 dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
981 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
982 break;
983 default:
984 /* in FIFO bypass mode, the interrupts are not used */
985 break;
986 }
987
988 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
989
990 switch (dac33->fifo_mode) {
991 case DAC33_FIFO_MODE1:
992 /*
993 * For mode1:
994 * Disable the FIFO bypass (Enable the use of FIFO)
995 * Select nSample mode
996 * BCLK is only running when data is needed by DAC33
997 */
998 fifoctrl_a &= ~DAC33_FBYPAS;
999 fifoctrl_a &= ~DAC33_FAUTO;
1000 if (dac33->keep_bclk)
1001 aictrl_b |= DAC33_BCLKON;
1002 else
1003 aictrl_b &= ~DAC33_BCLKON;
1004 break;
1005 case DAC33_FIFO_MODE7:
1006 /*
1007 * For mode1:
1008 * Disable the FIFO bypass (Enable the use of FIFO)
1009 * Select Threshold mode
1010 * BCLK is only running when data is needed by DAC33
1011 */
1012 fifoctrl_a &= ~DAC33_FBYPAS;
1013 fifoctrl_a |= DAC33_FAUTO;
1014 if (dac33->keep_bclk)
1015 aictrl_b |= DAC33_BCLKON;
1016 else
1017 aictrl_b &= ~DAC33_BCLKON;
1018 break;
1019 default:
1020 /*
1021 * For FIFO bypass mode:
1022 * Enable the FIFO bypass (Disable the FIFO use)
1023 * Set the BCLK as continous
1024 */
1025 fifoctrl_a |= DAC33_FBYPAS;
1026 aictrl_b |= DAC33_BCLKON;
1027 break;
1028 }
1029
1030 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
1031 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1032 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1033
1034 /*
1035 * BCLK divide ratio
1036 * 0: 1.5
1037 * 1: 1
1038 * 2: 2
1039 * ...
1040 * 254: 254
1041 * 255: 255
1042 */
1043 if (dac33->fifo_mode)
1044 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
1045 dac33->burst_bclkdiv);
1046 else
1047 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1048 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
1049 else
1050 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
1051
1052 switch (dac33->fifo_mode) {
1053 case DAC33_FIFO_MODE1:
1054 dac33_write16(codec, DAC33_ATHR_MSB,
1055 DAC33_THRREG(dac33->alarm_threshold));
1056 break;
1057 case DAC33_FIFO_MODE7:
1058 /*
1059 * Configure the threshold levels, and leave 10 sample space
1060 * at the bottom, and also at the top of the FIFO
1061 */
1062 dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1063 dac33_write16(codec, DAC33_LTHR_MSB,
1064 DAC33_THRREG(DAC33_MODE7_MARGIN));
1065 break;
1066 default:
1067 break;
1068 }
1069
1070 mutex_unlock(&dac33->mutex);
1071
1072 return 0;
1073 }
1074
1075 static void dac33_calculate_times(struct snd_pcm_substream *substream)
1076 {
1077 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1078 struct snd_soc_codec *codec = rtd->codec;
1079 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1080 unsigned int period_size = substream->runtime->period_size;
1081 unsigned int rate = substream->runtime->rate;
1082 unsigned int nsample_limit;
1083
1084 /* In bypass mode we don't need to calculate */
1085 if (!dac33->fifo_mode)
1086 return;
1087
1088 switch (dac33->fifo_mode) {
1089 case DAC33_FIFO_MODE1:
1090 /* Number of samples under i2c latency */
1091 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1092 dac33->mode1_latency);
1093 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1094
1095 if (period_size <= dac33->alarm_threshold)
1096 /*
1097 * Configure nSamaple to number of periods,
1098 * which covers the latency requironment.
1099 */
1100 dac33->nsample = period_size *
1101 ((dac33->alarm_threshold / period_size) +
1102 (dac33->alarm_threshold % period_size ?
1103 1 : 0));
1104 else if (period_size > nsample_limit)
1105 dac33->nsample = nsample_limit;
1106 else
1107 dac33->nsample = period_size;
1108
1109 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1110 dac33->nsample);
1111 dac33->t_stamp1 = 0;
1112 dac33->t_stamp2 = 0;
1113 break;
1114 case DAC33_FIFO_MODE7:
1115 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1116 dac33->burst_rate) + 9;
1117 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1118 dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1119 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1120 dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1121
1122 dac33->mode7_us_to_lthr =
1123 SAMPLES_TO_US(substream->runtime->rate,
1124 dac33->uthr - DAC33_MODE7_MARGIN + 1);
1125 dac33->t_stamp1 = 0;
1126 break;
1127 default:
1128 break;
1129 }
1130
1131 }
1132
1133 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1134 struct snd_soc_dai *dai)
1135 {
1136 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1137 struct snd_soc_codec *codec = rtd->codec;
1138 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1139 int ret = 0;
1140
1141 switch (cmd) {
1142 case SNDRV_PCM_TRIGGER_START:
1143 case SNDRV_PCM_TRIGGER_RESUME:
1144 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1145 if (dac33->fifo_mode) {
1146 dac33->state = DAC33_PREFILL;
1147 queue_work(dac33->dac33_wq, &dac33->work);
1148 }
1149 break;
1150 case SNDRV_PCM_TRIGGER_STOP:
1151 case SNDRV_PCM_TRIGGER_SUSPEND:
1152 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1153 if (dac33->fifo_mode) {
1154 dac33->state = DAC33_FLUSH;
1155 queue_work(dac33->dac33_wq, &dac33->work);
1156 }
1157 break;
1158 default:
1159 ret = -EINVAL;
1160 }
1161
1162 return ret;
1163 }
1164
1165 static snd_pcm_sframes_t dac33_dai_delay(
1166 struct snd_pcm_substream *substream,
1167 struct snd_soc_dai *dai)
1168 {
1169 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1170 struct snd_soc_codec *codec = rtd->codec;
1171 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1172 unsigned long long t0, t1, t_now;
1173 unsigned int time_delta, uthr;
1174 int samples_out, samples_in, samples;
1175 snd_pcm_sframes_t delay = 0;
1176
1177 switch (dac33->fifo_mode) {
1178 case DAC33_FIFO_BYPASS:
1179 break;
1180 case DAC33_FIFO_MODE1:
1181 spin_lock(&dac33->lock);
1182 t0 = dac33->t_stamp1;
1183 t1 = dac33->t_stamp2;
1184 spin_unlock(&dac33->lock);
1185 t_now = ktime_to_us(ktime_get());
1186
1187 /* We have not started to fill the FIFO yet, delay is 0 */
1188 if (!t1)
1189 goto out;
1190
1191 if (t0 > t1) {
1192 /*
1193 * Phase 1:
1194 * After Alarm threshold, and before nSample write
1195 */
1196 time_delta = t_now - t0;
1197 samples_out = time_delta ? US_TO_SAMPLES(
1198 substream->runtime->rate,
1199 time_delta) : 0;
1200
1201 if (likely(dac33->alarm_threshold > samples_out))
1202 delay = dac33->alarm_threshold - samples_out;
1203 else
1204 delay = 0;
1205 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1206 /*
1207 * Phase 2:
1208 * After nSample write (during burst operation)
1209 */
1210 time_delta = t_now - t0;
1211 samples_out = time_delta ? US_TO_SAMPLES(
1212 substream->runtime->rate,
1213 time_delta) : 0;
1214
1215 time_delta = t_now - t1;
1216 samples_in = time_delta ? US_TO_SAMPLES(
1217 dac33->burst_rate,
1218 time_delta) : 0;
1219
1220 samples = dac33->alarm_threshold;
1221 samples += (samples_in - samples_out);
1222
1223 if (likely(samples > 0))
1224 delay = samples;
1225 else
1226 delay = 0;
1227 } else {
1228 /*
1229 * Phase 3:
1230 * After burst operation, before next alarm threshold
1231 */
1232 time_delta = t_now - t0;
1233 samples_out = time_delta ? US_TO_SAMPLES(
1234 substream->runtime->rate,
1235 time_delta) : 0;
1236
1237 samples_in = dac33->nsample;
1238 samples = dac33->alarm_threshold;
1239 samples += (samples_in - samples_out);
1240
1241 if (likely(samples > 0))
1242 delay = samples > dac33->fifo_size ?
1243 dac33->fifo_size : samples;
1244 else
1245 delay = 0;
1246 }
1247 break;
1248 case DAC33_FIFO_MODE7:
1249 spin_lock(&dac33->lock);
1250 t0 = dac33->t_stamp1;
1251 uthr = dac33->uthr;
1252 spin_unlock(&dac33->lock);
1253 t_now = ktime_to_us(ktime_get());
1254
1255 /* We have not started to fill the FIFO yet, delay is 0 */
1256 if (!t0)
1257 goto out;
1258
1259 if (t_now <= t0) {
1260 /*
1261 * Either the timestamps are messed or equal. Report
1262 * maximum delay
1263 */
1264 delay = uthr;
1265 goto out;
1266 }
1267
1268 time_delta = t_now - t0;
1269 if (time_delta <= dac33->mode7_us_to_lthr) {
1270 /*
1271 * Phase 1:
1272 * After burst (draining phase)
1273 */
1274 samples_out = US_TO_SAMPLES(
1275 substream->runtime->rate,
1276 time_delta);
1277
1278 if (likely(uthr > samples_out))
1279 delay = uthr - samples_out;
1280 else
1281 delay = 0;
1282 } else {
1283 /*
1284 * Phase 2:
1285 * During burst operation
1286 */
1287 time_delta = time_delta - dac33->mode7_us_to_lthr;
1288
1289 samples_out = US_TO_SAMPLES(
1290 substream->runtime->rate,
1291 time_delta);
1292 samples_in = US_TO_SAMPLES(
1293 dac33->burst_rate,
1294 time_delta);
1295 delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1296
1297 if (unlikely(delay > uthr))
1298 delay = uthr;
1299 }
1300 break;
1301 default:
1302 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
1303 dac33->fifo_mode);
1304 break;
1305 }
1306 out:
1307 return delay;
1308 }
1309
1310 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1311 int clk_id, unsigned int freq, int dir)
1312 {
1313 struct snd_soc_codec *codec = codec_dai->codec;
1314 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1315 u8 ioc_reg, asrcb_reg;
1316
1317 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
1318 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
1319 switch (clk_id) {
1320 case TLV320DAC33_MCLK:
1321 ioc_reg |= DAC33_REFSEL;
1322 asrcb_reg |= DAC33_SRCREFSEL;
1323 break;
1324 case TLV320DAC33_SLEEPCLK:
1325 ioc_reg &= ~DAC33_REFSEL;
1326 asrcb_reg &= ~DAC33_SRCREFSEL;
1327 break;
1328 default:
1329 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
1330 break;
1331 }
1332 dac33->refclk = freq;
1333
1334 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1335 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1336
1337 return 0;
1338 }
1339
1340 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1341 unsigned int fmt)
1342 {
1343 struct snd_soc_codec *codec = codec_dai->codec;
1344 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1345 u8 aictrl_a, aictrl_b;
1346
1347 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1348 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1349 /* set master/slave audio interface */
1350 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1351 case SND_SOC_DAIFMT_CBM_CFM:
1352 /* Codec Master */
1353 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1354 break;
1355 case SND_SOC_DAIFMT_CBS_CFS:
1356 /* Codec Slave */
1357 if (dac33->fifo_mode) {
1358 dev_err(codec->dev, "FIFO mode requires master mode\n");
1359 return -EINVAL;
1360 } else
1361 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1362 break;
1363 default:
1364 return -EINVAL;
1365 }
1366
1367 aictrl_a &= ~DAC33_AFMT_MASK;
1368 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1369 case SND_SOC_DAIFMT_I2S:
1370 aictrl_a |= DAC33_AFMT_I2S;
1371 break;
1372 case SND_SOC_DAIFMT_DSP_A:
1373 aictrl_a |= DAC33_AFMT_DSP;
1374 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1375 aictrl_b |= DAC33_DATA_DELAY(0);
1376 break;
1377 case SND_SOC_DAIFMT_RIGHT_J:
1378 aictrl_a |= DAC33_AFMT_RIGHT_J;
1379 break;
1380 case SND_SOC_DAIFMT_LEFT_J:
1381 aictrl_a |= DAC33_AFMT_LEFT_J;
1382 break;
1383 default:
1384 dev_err(codec->dev, "Unsupported format (%u)\n",
1385 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1386 return -EINVAL;
1387 }
1388
1389 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1390 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1391
1392 return 0;
1393 }
1394
1395 static int dac33_soc_probe(struct snd_soc_codec *codec)
1396 {
1397 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1398 int ret = 0;
1399
1400 codec->control_data = dac33->control_data;
1401 codec->hw_write = (hw_write_t) i2c_master_send;
1402 codec->dapm.idle_bias_off = 1;
1403 dac33->codec = codec;
1404
1405 /* Read the tlv320dac33 ID registers */
1406 ret = dac33_hard_power(codec, 1);
1407 if (ret != 0) {
1408 dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
1409 goto err_power;
1410 }
1411 ret = dac33_read_id(codec);
1412 dac33_hard_power(codec, 0);
1413
1414 if (ret < 0) {
1415 dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
1416 ret = -ENODEV;
1417 goto err_power;
1418 }
1419
1420 /* Check if the IRQ number is valid and request it */
1421 if (dac33->irq >= 0) {
1422 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1423 IRQF_TRIGGER_RISING | IRQF_DISABLED,
1424 codec->name, codec);
1425 if (ret < 0) {
1426 dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1427 dac33->irq, ret);
1428 dac33->irq = -1;
1429 }
1430 if (dac33->irq != -1) {
1431 /* Setup work queue */
1432 dac33->dac33_wq =
1433 create_singlethread_workqueue("tlv320dac33");
1434 if (dac33->dac33_wq == NULL) {
1435 free_irq(dac33->irq, codec);
1436 return -ENOMEM;
1437 }
1438
1439 INIT_WORK(&dac33->work, dac33_work);
1440 }
1441 }
1442
1443 snd_soc_add_controls(codec, dac33_snd_controls,
1444 ARRAY_SIZE(dac33_snd_controls));
1445 /* Only add the FIFO controls, if we have valid IRQ number */
1446 if (dac33->irq >= 0)
1447 snd_soc_add_controls(codec, dac33_mode_snd_controls,
1448 ARRAY_SIZE(dac33_mode_snd_controls));
1449
1450 dac33_add_widgets(codec);
1451
1452 err_power:
1453 return ret;
1454 }
1455
1456 static int dac33_soc_remove(struct snd_soc_codec *codec)
1457 {
1458 struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
1459
1460 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1461
1462 if (dac33->irq >= 0) {
1463 free_irq(dac33->irq, dac33->codec);
1464 destroy_workqueue(dac33->dac33_wq);
1465 }
1466 return 0;
1467 }
1468
1469 static int dac33_soc_suspend(struct snd_soc_codec *codec, pm_message_t state)
1470 {
1471 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1472
1473 return 0;
1474 }
1475
1476 static int dac33_soc_resume(struct snd_soc_codec *codec)
1477 {
1478 dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1479
1480 return 0;
1481 }
1482
1483 static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
1484 .read = dac33_read_reg_cache,
1485 .write = dac33_write_locked,
1486 .set_bias_level = dac33_set_bias_level,
1487 .reg_cache_size = ARRAY_SIZE(dac33_reg),
1488 .reg_word_size = sizeof(u8),
1489 .reg_cache_default = dac33_reg,
1490 .probe = dac33_soc_probe,
1491 .remove = dac33_soc_remove,
1492 .suspend = dac33_soc_suspend,
1493 .resume = dac33_soc_resume,
1494 };
1495
1496 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1497 SNDRV_PCM_RATE_48000)
1498 #define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1499
1500 static struct snd_soc_dai_ops dac33_dai_ops = {
1501 .startup = dac33_startup,
1502 .shutdown = dac33_shutdown,
1503 .hw_params = dac33_hw_params,
1504 .trigger = dac33_pcm_trigger,
1505 .delay = dac33_dai_delay,
1506 .set_sysclk = dac33_set_dai_sysclk,
1507 .set_fmt = dac33_set_dai_fmt,
1508 };
1509
1510 static struct snd_soc_dai_driver dac33_dai = {
1511 .name = "tlv320dac33-hifi",
1512 .playback = {
1513 .stream_name = "Playback",
1514 .channels_min = 2,
1515 .channels_max = 2,
1516 .rates = DAC33_RATES,
1517 .formats = DAC33_FORMATS,},
1518 .ops = &dac33_dai_ops,
1519 };
1520
1521 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1522 const struct i2c_device_id *id)
1523 {
1524 struct tlv320dac33_platform_data *pdata;
1525 struct tlv320dac33_priv *dac33;
1526 int ret, i;
1527
1528 if (client->dev.platform_data == NULL) {
1529 dev_err(&client->dev, "Platform data not set\n");
1530 return -ENODEV;
1531 }
1532 pdata = client->dev.platform_data;
1533
1534 dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1535 if (dac33 == NULL)
1536 return -ENOMEM;
1537
1538 dac33->control_data = client;
1539 mutex_init(&dac33->mutex);
1540 spin_lock_init(&dac33->lock);
1541
1542 i2c_set_clientdata(client, dac33);
1543
1544 dac33->power_gpio = pdata->power_gpio;
1545 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1546 dac33->keep_bclk = pdata->keep_bclk;
1547 dac33->mode1_latency = pdata->mode1_latency;
1548 if (!dac33->mode1_latency)
1549 dac33->mode1_latency = 10000; /* 10ms */
1550 dac33->irq = client->irq;
1551 /* Disable FIFO use by default */
1552 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1553
1554 /* Check if the reset GPIO number is valid and request it */
1555 if (dac33->power_gpio >= 0) {
1556 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1557 if (ret < 0) {
1558 dev_err(&client->dev,
1559 "Failed to request reset GPIO (%d)\n",
1560 dac33->power_gpio);
1561 goto err_gpio;
1562 }
1563 gpio_direction_output(dac33->power_gpio, 0);
1564 }
1565
1566 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1567 dac33->supplies[i].supply = dac33_supply_names[i];
1568
1569 ret = regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1570 dac33->supplies);
1571
1572 if (ret != 0) {
1573 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1574 goto err_get;
1575 }
1576
1577 ret = snd_soc_register_codec(&client->dev,
1578 &soc_codec_dev_tlv320dac33, &dac33_dai, 1);
1579 if (ret < 0)
1580 goto err_register;
1581
1582 return ret;
1583 err_register:
1584 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1585 err_get:
1586 if (dac33->power_gpio >= 0)
1587 gpio_free(dac33->power_gpio);
1588 err_gpio:
1589 kfree(dac33);
1590 return ret;
1591 }
1592
1593 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1594 {
1595 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1596
1597 if (unlikely(dac33->chip_power))
1598 dac33_hard_power(dac33->codec, 0);
1599
1600 if (dac33->power_gpio >= 0)
1601 gpio_free(dac33->power_gpio);
1602
1603 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1604
1605 snd_soc_unregister_codec(&client->dev);
1606 kfree(dac33);
1607
1608 return 0;
1609 }
1610
1611 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1612 {
1613 .name = "tlv320dac33",
1614 .driver_data = 0,
1615 },
1616 { },
1617 };
1618 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1619
1620 static struct i2c_driver tlv320dac33_i2c_driver = {
1621 .driver = {
1622 .name = "tlv320dac33-codec",
1623 .owner = THIS_MODULE,
1624 },
1625 .probe = dac33_i2c_probe,
1626 .remove = __devexit_p(dac33_i2c_remove),
1627 .id_table = tlv320dac33_i2c_id,
1628 };
1629
1630 static int __init dac33_module_init(void)
1631 {
1632 int r;
1633 r = i2c_add_driver(&tlv320dac33_i2c_driver);
1634 if (r < 0) {
1635 printk(KERN_ERR "DAC33: driver registration failed\n");
1636 return r;
1637 }
1638 return 0;
1639 }
1640 module_init(dac33_module_init);
1641
1642 static void __exit dac33_module_exit(void)
1643 {
1644 i2c_del_driver(&tlv320dac33_i2c_driver);
1645 }
1646 module_exit(dac33_module_exit);
1647
1648
1649 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1650 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1651 MODULE_LICENSE("GPL");
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