1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ALSA SoC Texas Instruments TLV320DAC33 codec driver
4 *
5 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
6 *
7 * Copyright: (C) 2009 Nokia Corporation
8 */
9
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
14 #include <linux/pm.h>
15 #include <linux/i2c.h>
16 #include <linux/interrupt.h>
17 #include <linux/gpio.h>
18 #include <linux/regulator/consumer.h>
19 #include <linux/slab.h>
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 #include <sound/initval.h>
25 #include <sound/tlv.h>
26
27 #include <sound/tlv320dac33-plat.h>
28 #include "tlv320dac33.h"
29
30 /*
31 * The internal FIFO is 24576 bytes long
32 * It can be configured to hold 16bit or 24bit samples
33 * In 16bit configuration the FIFO can hold 6144 stereo samples
34 * In 24bit configuration the FIFO can hold 4096 stereo samples
35 */
36 #define DAC33_FIFO_SIZE_16BIT 6144
37 #define DAC33_FIFO_SIZE_24BIT 4096
38 #define DAC33_MODE7_MARGIN 10 /* Safety margin for FIFO in Mode7 */
39
40 #define BURST_BASEFREQ_HZ 49152000
41
42 #define SAMPLES_TO_US(rate, samples) \
43 (1000000000 / (((rate) * 1000) / (samples)))
44
45 #define US_TO_SAMPLES(rate, us) \
46 ((rate) / (1000000 / ((us) < 1000000 ? (us) : 1000000)))
47
48 #define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
49 (((samples)*5000) / (((burstrate)*5000) / ((burstrate) - (playrate))))
50
51 static void dac33_calculate_times(struct snd_pcm_substream *substream,
52 struct snd_soc_component *component);
53 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
54 struct snd_soc_component *component);
55
56 enum dac33_state {
57 DAC33_IDLE = 0,
58 DAC33_PREFILL,
59 DAC33_PLAYBACK,
60 DAC33_FLUSH,
61 };
62
63 enum dac33_fifo_modes {
64 DAC33_FIFO_BYPASS = 0,
65 DAC33_FIFO_MODE1,
66 DAC33_FIFO_MODE7,
67 DAC33_FIFO_LAST_MODE,
68 };
69
70 #define DAC33_NUM_SUPPLIES 3
71 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
72 "AVDD",
73 "DVDD",
74 "IOVDD",
75 };
76
77 struct tlv320dac33_priv {
78 struct mutex mutex;
79 struct work_struct work;
80 struct snd_soc_component *component;
81 struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
82 struct snd_pcm_substream *substream;
83 int power_gpio;
84 int chip_power;
85 int irq;
86 unsigned int refclk;
87
88 unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
89 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
90 unsigned int fifo_size; /* Size of the FIFO in samples */
91 unsigned int nsample; /* burst read amount from host */
92 int mode1_latency; /* latency caused by the i2c writes in
93 * us */
94 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
95 u8 *reg_cache;
96 unsigned int burst_rate; /* Interface speed in Burst modes */
97
98 int keep_bclk; /* Keep the BCLK continuously running
99 * in FIFO modes */
100 spinlock_t lock;
101 unsigned long long t_stamp1; /* Time stamp for FIFO modes to */
102 unsigned long long t_stamp2; /* calculate the FIFO caused delay */
103
104 unsigned int mode1_us_burst; /* Time to burst read n number of
105 * samples */
106 unsigned int mode7_us_to_lthr; /* Time to reach lthr from uthr */
107
108 unsigned int uthr;
109
110 enum dac33_state state;
111 struct i2c_client *i2c;
112 };
113
114 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
115 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
116 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
117 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
118 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
119 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
120 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
121 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
122 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
123 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
124 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
125 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
126 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
127 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
128 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
129 0x00, 0x00, /* 0x38 - 0x39 */
130 /* Registers 0x3a - 0x3f are reserved */
131 0x00, 0x00, /* 0x3a - 0x3b */
132 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
133
134 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
135 0x00, 0x80, /* 0x44 - 0x45 */
136 /* Registers 0x46 - 0x47 are reserved */
137 0x80, 0x80, /* 0x46 - 0x47 */
138
139 0x80, 0x00, 0x00, /* 0x48 - 0x4a */
140 /* Registers 0x4b - 0x7c are reserved */
141 0x00, /* 0x4b */
142 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
143 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
144 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
145 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
146 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
147 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
148 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
149 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
150 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
151 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
152 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
153 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
154 0x00, /* 0x7c */
155
156 0xda, 0x33, 0x03, /* 0x7d - 0x7f */
157 };
158
159 /* Register read and write */
dac33_read_reg_cache(struct snd_soc_component * component,unsigned reg)160 static inline unsigned int dac33_read_reg_cache(struct snd_soc_component *component,
161 unsigned reg)
162 {
163 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
164 u8 *cache = dac33->reg_cache;
165 if (reg >= DAC33_CACHEREGNUM)
166 return 0;
167
168 return cache[reg];
169 }
170
dac33_write_reg_cache(struct snd_soc_component * component,u8 reg,u8 value)171 static inline void dac33_write_reg_cache(struct snd_soc_component *component,
172 u8 reg, u8 value)
173 {
174 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
175 u8 *cache = dac33->reg_cache;
176 if (reg >= DAC33_CACHEREGNUM)
177 return;
178
179 cache[reg] = value;
180 }
181
dac33_read(struct snd_soc_component * component,unsigned int reg,u8 * value)182 static int dac33_read(struct snd_soc_component *component, unsigned int reg,
183 u8 *value)
184 {
185 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
186 int val, ret = 0;
187
188 *value = reg & 0xff;
189
190 /* If powered off, return the cached value */
191 if (dac33->chip_power) {
192 val = i2c_smbus_read_byte_data(dac33->i2c, value[0]);
193 if (val < 0) {
194 dev_err(component->dev, "Read failed (%d)\n", val);
195 value[0] = dac33_read_reg_cache(component, reg);
196 ret = val;
197 } else {
198 value[0] = val;
199 dac33_write_reg_cache(component, reg, val);
200 }
201 } else {
202 value[0] = dac33_read_reg_cache(component, reg);
203 }
204
205 return ret;
206 }
207
dac33_write(struct snd_soc_component * component,unsigned int reg,unsigned int value)208 static int dac33_write(struct snd_soc_component *component, unsigned int reg,
209 unsigned int value)
210 {
211 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
212 u8 data[2];
213 int ret = 0;
214
215 /*
216 * data is
217 * D15..D8 dac33 register offset
218 * D7...D0 register data
219 */
220 data[0] = reg & 0xff;
221 data[1] = value & 0xff;
222
223 dac33_write_reg_cache(component, data[0], data[1]);
224 if (dac33->chip_power) {
225 ret = i2c_master_send(dac33->i2c, data, 2);
226 if (ret != 2)
227 dev_err(component->dev, "Write failed (%d)\n", ret);
228 else
229 ret = 0;
230 }
231
232 return ret;
233 }
234
dac33_write_locked(struct snd_soc_component * component,unsigned int reg,unsigned int value)235 static int dac33_write_locked(struct snd_soc_component *component, unsigned int reg,
236 unsigned int value)
237 {
238 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
239 int ret;
240
241 mutex_lock(&dac33->mutex);
242 ret = dac33_write(component, reg, value);
243 mutex_unlock(&dac33->mutex);
244
245 return ret;
246 }
247
248 #define DAC33_I2C_ADDR_AUTOINC 0x80
dac33_write16(struct snd_soc_component * component,unsigned int reg,unsigned int value)249 static int dac33_write16(struct snd_soc_component *component, unsigned int reg,
250 unsigned int value)
251 {
252 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
253 u8 data[3];
254 int ret = 0;
255
256 /*
257 * data is
258 * D23..D16 dac33 register offset
259 * D15..D8 register data MSB
260 * D7...D0 register data LSB
261 */
262 data[0] = reg & 0xff;
263 data[1] = (value >> 8) & 0xff;
264 data[2] = value & 0xff;
265
266 dac33_write_reg_cache(component, data[0], data[1]);
267 dac33_write_reg_cache(component, data[0] + 1, data[2]);
268
269 if (dac33->chip_power) {
270 /* We need to set autoincrement mode for 16 bit writes */
271 data[0] |= DAC33_I2C_ADDR_AUTOINC;
272 ret = i2c_master_send(dac33->i2c, data, 3);
273 if (ret != 3)
274 dev_err(component->dev, "Write failed (%d)\n", ret);
275 else
276 ret = 0;
277 }
278
279 return ret;
280 }
281
dac33_init_chip(struct snd_soc_component * component)282 static void dac33_init_chip(struct snd_soc_component *component)
283 {
284 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
285
286 if (unlikely(!dac33->chip_power))
287 return;
288
289 /* A : DAC sample rate Fsref/1.5 */
290 dac33_write(component, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
291 /* B : DAC src=normal, not muted */
292 dac33_write(component, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
293 DAC33_DACSRCL_LEFT);
294 /* C : (defaults) */
295 dac33_write(component, DAC33_DAC_CTRL_C, 0x00);
296
297 /* 73 : volume soft stepping control,
298 clock source = internal osc (?) */
299 dac33_write(component, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
300
301 /* Restore only selected registers (gains mostly) */
302 dac33_write(component, DAC33_LDAC_DIG_VOL_CTRL,
303 dac33_read_reg_cache(component, DAC33_LDAC_DIG_VOL_CTRL));
304 dac33_write(component, DAC33_RDAC_DIG_VOL_CTRL,
305 dac33_read_reg_cache(component, DAC33_RDAC_DIG_VOL_CTRL));
306
307 dac33_write(component, DAC33_LINEL_TO_LLO_VOL,
308 dac33_read_reg_cache(component, DAC33_LINEL_TO_LLO_VOL));
309 dac33_write(component, DAC33_LINER_TO_RLO_VOL,
310 dac33_read_reg_cache(component, DAC33_LINER_TO_RLO_VOL));
311
312 dac33_write(component, DAC33_OUT_AMP_CTRL,
313 dac33_read_reg_cache(component, DAC33_OUT_AMP_CTRL));
314
315 dac33_write(component, DAC33_LDAC_PWR_CTRL,
316 dac33_read_reg_cache(component, DAC33_LDAC_PWR_CTRL));
317 dac33_write(component, DAC33_RDAC_PWR_CTRL,
318 dac33_read_reg_cache(component, DAC33_RDAC_PWR_CTRL));
319 }
320
dac33_read_id(struct snd_soc_component * component)321 static inline int dac33_read_id(struct snd_soc_component *component)
322 {
323 int i, ret = 0;
324 u8 reg;
325
326 for (i = 0; i < 3; i++) {
327 ret = dac33_read(component, DAC33_DEVICE_ID_MSB + i, ®);
328 if (ret < 0)
329 break;
330 }
331
332 return ret;
333 }
334
dac33_soft_power(struct snd_soc_component * component,int power)335 static inline void dac33_soft_power(struct snd_soc_component *component, int power)
336 {
337 u8 reg;
338
339 reg = dac33_read_reg_cache(component, DAC33_PWR_CTRL);
340 if (power)
341 reg |= DAC33_PDNALLB;
342 else
343 reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
344 DAC33_DACRPDNB | DAC33_DACLPDNB);
345 dac33_write(component, DAC33_PWR_CTRL, reg);
346 }
347
dac33_disable_digital(struct snd_soc_component * component)348 static inline void dac33_disable_digital(struct snd_soc_component *component)
349 {
350 u8 reg;
351
352 /* Stop the DAI clock */
353 reg = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B);
354 reg &= ~DAC33_BCLKON;
355 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_B, reg);
356
357 /* Power down the Oscillator, and DACs */
358 reg = dac33_read_reg_cache(component, DAC33_PWR_CTRL);
359 reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
360 dac33_write(component, DAC33_PWR_CTRL, reg);
361 }
362
dac33_hard_power(struct snd_soc_component * component,int power)363 static int dac33_hard_power(struct snd_soc_component *component, int power)
364 {
365 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
366 int ret = 0;
367
368 mutex_lock(&dac33->mutex);
369
370 /* Safety check */
371 if (unlikely(power == dac33->chip_power)) {
372 dev_dbg(component->dev, "Trying to set the same power state: %s\n",
373 power ? "ON" : "OFF");
374 goto exit;
375 }
376
377 if (power) {
378 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
379 dac33->supplies);
380 if (ret != 0) {
381 dev_err(component->dev,
382 "Failed to enable supplies: %d\n", ret);
383 goto exit;
384 }
385
386 if (dac33->power_gpio >= 0)
387 gpio_set_value(dac33->power_gpio, 1);
388
389 dac33->chip_power = 1;
390 } else {
391 dac33_soft_power(component, 0);
392 if (dac33->power_gpio >= 0)
393 gpio_set_value(dac33->power_gpio, 0);
394
395 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
396 dac33->supplies);
397 if (ret != 0) {
398 dev_err(component->dev,
399 "Failed to disable supplies: %d\n", ret);
400 goto exit;
401 }
402
403 dac33->chip_power = 0;
404 }
405
406 exit:
407 mutex_unlock(&dac33->mutex);
408 return ret;
409 }
410
dac33_playback_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)411 static int dac33_playback_event(struct snd_soc_dapm_widget *w,
412 struct snd_kcontrol *kcontrol, int event)
413 {
414 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
415 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
416
417 switch (event) {
418 case SND_SOC_DAPM_PRE_PMU:
419 if (likely(dac33->substream)) {
420 dac33_calculate_times(dac33->substream, component);
421 dac33_prepare_chip(dac33->substream, component);
422 }
423 break;
424 case SND_SOC_DAPM_POST_PMD:
425 dac33_disable_digital(component);
426 break;
427 }
428 return 0;
429 }
430
dac33_get_fifo_mode(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)431 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
432 struct snd_ctl_elem_value *ucontrol)
433 {
434 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
435 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
436
437 ucontrol->value.enumerated.item[0] = dac33->fifo_mode;
438
439 return 0;
440 }
441
dac33_set_fifo_mode(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)442 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
443 struct snd_ctl_elem_value *ucontrol)
444 {
445 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
446 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
447 int ret = 0;
448
449 if (dac33->fifo_mode == ucontrol->value.enumerated.item[0])
450 return 0;
451 /* Do not allow changes while stream is running*/
452 if (snd_soc_component_active(component))
453 return -EPERM;
454
455 if (ucontrol->value.enumerated.item[0] >= DAC33_FIFO_LAST_MODE)
456 ret = -EINVAL;
457 else
458 dac33->fifo_mode = ucontrol->value.enumerated.item[0];
459
460 return ret;
461 }
462
463 /* Codec operation modes */
464 static const char *dac33_fifo_mode_texts[] = {
465 "Bypass", "Mode 1", "Mode 7"
466 };
467
468 static SOC_ENUM_SINGLE_EXT_DECL(dac33_fifo_mode_enum, dac33_fifo_mode_texts);
469
470 /* L/R Line Output Gain */
471 static const char *lr_lineout_gain_texts[] = {
472 "Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
473 "Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
474 };
475
476 static SOC_ENUM_SINGLE_DECL(l_lineout_gain_enum,
477 DAC33_LDAC_PWR_CTRL, 0,
478 lr_lineout_gain_texts);
479
480 static SOC_ENUM_SINGLE_DECL(r_lineout_gain_enum,
481 DAC33_RDAC_PWR_CTRL, 0,
482 lr_lineout_gain_texts);
483
484 /*
485 * DACL/R digital volume control:
486 * from 0 dB to -63.5 in 0.5 dB steps
487 * Need to be inverted later on:
488 * 0x00 == 0 dB
489 * 0x7f == -63.5 dB
490 */
491 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
492
493 static const struct snd_kcontrol_new dac33_snd_controls[] = {
494 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
495 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
496 0, 0x7f, 1, dac_digivol_tlv),
497 SOC_DOUBLE_R("DAC Digital Playback Switch",
498 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
499 SOC_DOUBLE_R("Line to Line Out Volume",
500 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
501 SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
502 SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
503 };
504
505 static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
506 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
507 dac33_get_fifo_mode, dac33_set_fifo_mode),
508 };
509
510 /* Analog bypass */
511 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
512 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
513
514 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
515 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
516
517 /* LOP L/R invert selection */
518 static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
519
520 static SOC_ENUM_SINGLE_DECL(dac33_left_lom_enum,
521 DAC33_OUT_AMP_CTRL, 3,
522 dac33_lr_lom_texts);
523
524 static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
525 SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
526
527 static SOC_ENUM_SINGLE_DECL(dac33_right_lom_enum,
528 DAC33_OUT_AMP_CTRL, 2,
529 dac33_lr_lom_texts);
530
531 static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
532 SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
533
534 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
535 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
536 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
537
538 SND_SOC_DAPM_INPUT("LINEL"),
539 SND_SOC_DAPM_INPUT("LINER"),
540
541 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
542 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
543
544 /* Analog bypass */
545 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
546 &dac33_dapm_abypassl_control),
547 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
548 &dac33_dapm_abypassr_control),
549
550 SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
551 &dac33_dapm_left_lom_control),
552 SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
553 &dac33_dapm_right_lom_control),
554 /*
555 * For DAPM path, when only the anlog bypass path is enabled, and the
556 * LOP inverted from the corresponding DAC side.
557 * This is needed, so we can attach the DAC power supply in this case.
558 */
559 SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
560 SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
561
562 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
563 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
564 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
565 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
566
567 SND_SOC_DAPM_SUPPLY("Left DAC Power",
568 DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
569 SND_SOC_DAPM_SUPPLY("Right DAC Power",
570 DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
571
572 SND_SOC_DAPM_SUPPLY("Codec Power",
573 DAC33_PWR_CTRL, 4, 0, NULL, 0),
574
575 SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
576 SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
577 };
578
579 static const struct snd_soc_dapm_route audio_map[] = {
580 /* Analog bypass */
581 {"Analog Left Bypass", "Switch", "LINEL"},
582 {"Analog Right Bypass", "Switch", "LINER"},
583
584 {"Output Left Amplifier", NULL, "DACL"},
585 {"Output Right Amplifier", NULL, "DACR"},
586
587 {"Left Bypass PGA", NULL, "Analog Left Bypass"},
588 {"Right Bypass PGA", NULL, "Analog Right Bypass"},
589
590 {"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
591 {"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
592 {"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
593 {"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
594
595 {"Output Left Amplifier", NULL, "Left LOM Inverted From"},
596 {"Output Right Amplifier", NULL, "Right LOM Inverted From"},
597
598 {"DACL", NULL, "Left DAC Power"},
599 {"DACR", NULL, "Right DAC Power"},
600
601 {"Left Bypass PGA", NULL, "Left DAC Power"},
602 {"Right Bypass PGA", NULL, "Right DAC Power"},
603
604 /* output */
605 {"LEFT_LO", NULL, "Output Left Amplifier"},
606 {"RIGHT_LO", NULL, "Output Right Amplifier"},
607
608 {"LEFT_LO", NULL, "Codec Power"},
609 {"RIGHT_LO", NULL, "Codec Power"},
610 };
611
dac33_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)612 static int dac33_set_bias_level(struct snd_soc_component *component,
613 enum snd_soc_bias_level level)
614 {
615 int ret;
616
617 switch (level) {
618 case SND_SOC_BIAS_ON:
619 break;
620 case SND_SOC_BIAS_PREPARE:
621 break;
622 case SND_SOC_BIAS_STANDBY:
623 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
624 /* Coming from OFF, switch on the component */
625 ret = dac33_hard_power(component, 1);
626 if (ret != 0)
627 return ret;
628
629 dac33_init_chip(component);
630 }
631 break;
632 case SND_SOC_BIAS_OFF:
633 /* Do not power off, when the component is already off */
634 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
635 return 0;
636 ret = dac33_hard_power(component, 0);
637 if (ret != 0)
638 return ret;
639 break;
640 }
641
642 return 0;
643 }
644
dac33_prefill_handler(struct tlv320dac33_priv * dac33)645 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
646 {
647 struct snd_soc_component *component = dac33->component;
648 unsigned int delay;
649 unsigned long flags;
650
651 switch (dac33->fifo_mode) {
652 case DAC33_FIFO_MODE1:
653 dac33_write16(component, DAC33_NSAMPLE_MSB,
654 DAC33_THRREG(dac33->nsample));
655
656 /* Take the timestamps */
657 spin_lock_irqsave(&dac33->lock, flags);
658 dac33->t_stamp2 = ktime_to_us(ktime_get());
659 dac33->t_stamp1 = dac33->t_stamp2;
660 spin_unlock_irqrestore(&dac33->lock, flags);
661
662 dac33_write16(component, DAC33_PREFILL_MSB,
663 DAC33_THRREG(dac33->alarm_threshold));
664 /* Enable Alarm Threshold IRQ with a delay */
665 delay = SAMPLES_TO_US(dac33->burst_rate,
666 dac33->alarm_threshold) + 1000;
667 usleep_range(delay, delay + 500);
668 dac33_write(component, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
669 break;
670 case DAC33_FIFO_MODE7:
671 /* Take the timestamp */
672 spin_lock_irqsave(&dac33->lock, flags);
673 dac33->t_stamp1 = ktime_to_us(ktime_get());
674 /* Move back the timestamp with drain time */
675 dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
676 spin_unlock_irqrestore(&dac33->lock, flags);
677
678 dac33_write16(component, DAC33_PREFILL_MSB,
679 DAC33_THRREG(DAC33_MODE7_MARGIN));
680
681 /* Enable Upper Threshold IRQ */
682 dac33_write(component, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
683 break;
684 default:
685 dev_warn(component->dev, "Unhandled FIFO mode: %d\n",
686 dac33->fifo_mode);
687 break;
688 }
689 }
690
dac33_playback_handler(struct tlv320dac33_priv * dac33)691 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
692 {
693 struct snd_soc_component *component = dac33->component;
694 unsigned long flags;
695
696 switch (dac33->fifo_mode) {
697 case DAC33_FIFO_MODE1:
698 /* Take the timestamp */
699 spin_lock_irqsave(&dac33->lock, flags);
700 dac33->t_stamp2 = ktime_to_us(ktime_get());
701 spin_unlock_irqrestore(&dac33->lock, flags);
702
703 dac33_write16(component, DAC33_NSAMPLE_MSB,
704 DAC33_THRREG(dac33->nsample));
705 break;
706 case DAC33_FIFO_MODE7:
707 /* At the moment we are not using interrupts in mode7 */
708 break;
709 default:
710 dev_warn(component->dev, "Unhandled FIFO mode: %d\n",
711 dac33->fifo_mode);
712 break;
713 }
714 }
715
dac33_work(struct work_struct * work)716 static void dac33_work(struct work_struct *work)
717 {
718 struct snd_soc_component *component;
719 struct tlv320dac33_priv *dac33;
720 u8 reg;
721
722 dac33 = container_of(work, struct tlv320dac33_priv, work);
723 component = dac33->component;
724
725 mutex_lock(&dac33->mutex);
726 switch (dac33->state) {
727 case DAC33_PREFILL:
728 dac33->state = DAC33_PLAYBACK;
729 dac33_prefill_handler(dac33);
730 break;
731 case DAC33_PLAYBACK:
732 dac33_playback_handler(dac33);
733 break;
734 case DAC33_IDLE:
735 break;
736 case DAC33_FLUSH:
737 dac33->state = DAC33_IDLE;
738 /* Mask all interrupts from dac33 */
739 dac33_write(component, DAC33_FIFO_IRQ_MASK, 0);
740
741 /* flush fifo */
742 reg = dac33_read_reg_cache(component, DAC33_FIFO_CTRL_A);
743 reg |= DAC33_FIFOFLUSH;
744 dac33_write(component, DAC33_FIFO_CTRL_A, reg);
745 break;
746 }
747 mutex_unlock(&dac33->mutex);
748 }
749
dac33_interrupt_handler(int irq,void * dev)750 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
751 {
752 struct snd_soc_component *component = dev;
753 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
754 unsigned long flags;
755
756 spin_lock_irqsave(&dac33->lock, flags);
757 dac33->t_stamp1 = ktime_to_us(ktime_get());
758 spin_unlock_irqrestore(&dac33->lock, flags);
759
760 /* Do not schedule the workqueue in Mode7 */
761 if (dac33->fifo_mode != DAC33_FIFO_MODE7)
762 schedule_work(&dac33->work);
763
764 return IRQ_HANDLED;
765 }
766
dac33_oscwait(struct snd_soc_component * component)767 static void dac33_oscwait(struct snd_soc_component *component)
768 {
769 int timeout = 60;
770 u8 reg;
771
772 do {
773 usleep_range(1000, 2000);
774 dac33_read(component, DAC33_INT_OSC_STATUS, ®);
775 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
776 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
777 dev_err(component->dev,
778 "internal oscillator calibration failed\n");
779 }
780
dac33_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)781 static int dac33_startup(struct snd_pcm_substream *substream,
782 struct snd_soc_dai *dai)
783 {
784 struct snd_soc_component *component = dai->component;
785 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
786
787 /* Stream started, save the substream pointer */
788 dac33->substream = substream;
789
790 return 0;
791 }
792
dac33_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)793 static void dac33_shutdown(struct snd_pcm_substream *substream,
794 struct snd_soc_dai *dai)
795 {
796 struct snd_soc_component *component = dai->component;
797 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
798
799 dac33->substream = NULL;
800 }
801
802 #define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
803 (BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
dac33_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)804 static int dac33_hw_params(struct snd_pcm_substream *substream,
805 struct snd_pcm_hw_params *params,
806 struct snd_soc_dai *dai)
807 {
808 struct snd_soc_component *component = dai->component;
809 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
810
811 /* Check parameters for validity */
812 switch (params_rate(params)) {
813 case 44100:
814 case 48000:
815 break;
816 default:
817 dev_err(component->dev, "unsupported rate %d\n",
818 params_rate(params));
819 return -EINVAL;
820 }
821
822 switch (params_width(params)) {
823 case 16:
824 dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
825 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
826 break;
827 case 32:
828 dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
829 dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
830 break;
831 default:
832 dev_err(component->dev, "unsupported width %d\n",
833 params_width(params));
834 return -EINVAL;
835 }
836
837 return 0;
838 }
839
840 #define CALC_OSCSET(rate, refclk) ( \
841 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
842 #define CALC_RATIOSET(rate, refclk) ( \
843 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
844
845 /*
846 * tlv320dac33 is strict on the sequence of the register writes, if the register
847 * writes happens in different order, than dac33 might end up in unknown state.
848 * Use the known, working sequence of register writes to initialize the dac33.
849 */
dac33_prepare_chip(struct snd_pcm_substream * substream,struct snd_soc_component * component)850 static int dac33_prepare_chip(struct snd_pcm_substream *substream,
851 struct snd_soc_component *component)
852 {
853 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
854 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
855 u8 aictrl_a, aictrl_b, fifoctrl_a;
856
857 switch (substream->runtime->rate) {
858 case 44100:
859 case 48000:
860 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
861 ratioset = CALC_RATIOSET(substream->runtime->rate,
862 dac33->refclk);
863 break;
864 default:
865 dev_err(component->dev, "unsupported rate %d\n",
866 substream->runtime->rate);
867 return -EINVAL;
868 }
869
870
871 aictrl_a = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_A);
872 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
873 /* Read FIFO control A, and clear FIFO flush bit */
874 fifoctrl_a = dac33_read_reg_cache(component, DAC33_FIFO_CTRL_A);
875 fifoctrl_a &= ~DAC33_FIFOFLUSH;
876
877 fifoctrl_a &= ~DAC33_WIDTH;
878 switch (substream->runtime->format) {
879 case SNDRV_PCM_FORMAT_S16_LE:
880 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
881 fifoctrl_a |= DAC33_WIDTH;
882 break;
883 case SNDRV_PCM_FORMAT_S32_LE:
884 aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
885 break;
886 default:
887 dev_err(component->dev, "unsupported format %d\n",
888 substream->runtime->format);
889 return -EINVAL;
890 }
891
892 mutex_lock(&dac33->mutex);
893
894 if (!dac33->chip_power) {
895 /*
896 * Chip is not powered yet.
897 * Do the init in the dac33_set_bias_level later.
898 */
899 mutex_unlock(&dac33->mutex);
900 return 0;
901 }
902
903 dac33_soft_power(component, 0);
904 dac33_soft_power(component, 1);
905
906 reg_tmp = dac33_read_reg_cache(component, DAC33_INT_OSC_CTRL);
907 dac33_write(component, DAC33_INT_OSC_CTRL, reg_tmp);
908
909 /* Write registers 0x08 and 0x09 (MSB, LSB) */
910 dac33_write16(component, DAC33_INT_OSC_FREQ_RAT_A, oscset);
911
912 /* OSC calibration time */
913 dac33_write(component, DAC33_CALIB_TIME, 96);
914
915 /* adjustment treshold & step */
916 dac33_write(component, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
917 DAC33_ADJSTEP(1));
918
919 /* div=4 / gain=1 / div */
920 dac33_write(component, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
921
922 pwr_ctrl = dac33_read_reg_cache(component, DAC33_PWR_CTRL);
923 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
924 dac33_write(component, DAC33_PWR_CTRL, pwr_ctrl);
925
926 dac33_oscwait(component);
927
928 if (dac33->fifo_mode) {
929 /* Generic for all FIFO modes */
930 /* 50-51 : ASRC Control registers */
931 dac33_write(component, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
932 dac33_write(component, DAC33_ASRC_CTRL_B, 1); /* ??? */
933
934 /* Write registers 0x34 and 0x35 (MSB, LSB) */
935 dac33_write16(component, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
936
937 /* Set interrupts to high active */
938 dac33_write(component, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
939 } else {
940 /* FIFO bypass mode */
941 /* 50-51 : ASRC Control registers */
942 dac33_write(component, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
943 dac33_write(component, DAC33_ASRC_CTRL_B, 0); /* ??? */
944 }
945
946 /* Interrupt behaviour configuration */
947 switch (dac33->fifo_mode) {
948 case DAC33_FIFO_MODE1:
949 dac33_write(component, DAC33_FIFO_IRQ_MODE_B,
950 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
951 break;
952 case DAC33_FIFO_MODE7:
953 dac33_write(component, DAC33_FIFO_IRQ_MODE_A,
954 DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
955 break;
956 default:
957 /* in FIFO bypass mode, the interrupts are not used */
958 break;
959 }
960
961 aictrl_b = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B);
962
963 switch (dac33->fifo_mode) {
964 case DAC33_FIFO_MODE1:
965 /*
966 * For mode1:
967 * Disable the FIFO bypass (Enable the use of FIFO)
968 * Select nSample mode
969 * BCLK is only running when data is needed by DAC33
970 */
971 fifoctrl_a &= ~DAC33_FBYPAS;
972 fifoctrl_a &= ~DAC33_FAUTO;
973 if (dac33->keep_bclk)
974 aictrl_b |= DAC33_BCLKON;
975 else
976 aictrl_b &= ~DAC33_BCLKON;
977 break;
978 case DAC33_FIFO_MODE7:
979 /*
980 * For mode1:
981 * Disable the FIFO bypass (Enable the use of FIFO)
982 * Select Threshold mode
983 * BCLK is only running when data is needed by DAC33
984 */
985 fifoctrl_a &= ~DAC33_FBYPAS;
986 fifoctrl_a |= DAC33_FAUTO;
987 if (dac33->keep_bclk)
988 aictrl_b |= DAC33_BCLKON;
989 else
990 aictrl_b &= ~DAC33_BCLKON;
991 break;
992 default:
993 /*
994 * For FIFO bypass mode:
995 * Enable the FIFO bypass (Disable the FIFO use)
996 * Set the BCLK as continuous
997 */
998 fifoctrl_a |= DAC33_FBYPAS;
999 aictrl_b |= DAC33_BCLKON;
1000 break;
1001 }
1002
1003 dac33_write(component, DAC33_FIFO_CTRL_A, fifoctrl_a);
1004 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1005 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1006
1007 /*
1008 * BCLK divide ratio
1009 * 0: 1.5
1010 * 1: 1
1011 * 2: 2
1012 * ...
1013 * 254: 254
1014 * 255: 255
1015 */
1016 if (dac33->fifo_mode)
1017 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_C,
1018 dac33->burst_bclkdiv);
1019 else
1020 if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
1021 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_C, 32);
1022 else
1023 dac33_write(component, DAC33_SER_AUDIOIF_CTRL_C, 16);
1024
1025 switch (dac33->fifo_mode) {
1026 case DAC33_FIFO_MODE1:
1027 dac33_write16(component, DAC33_ATHR_MSB,
1028 DAC33_THRREG(dac33->alarm_threshold));
1029 break;
1030 case DAC33_FIFO_MODE7:
1031 /*
1032 * Configure the threshold levels, and leave 10 sample space
1033 * at the bottom, and also at the top of the FIFO
1034 */
1035 dac33_write16(component, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
1036 dac33_write16(component, DAC33_LTHR_MSB,
1037 DAC33_THRREG(DAC33_MODE7_MARGIN));
1038 break;
1039 default:
1040 break;
1041 }
1042
1043 mutex_unlock(&dac33->mutex);
1044
1045 return 0;
1046 }
1047
dac33_calculate_times(struct snd_pcm_substream * substream,struct snd_soc_component * component)1048 static void dac33_calculate_times(struct snd_pcm_substream *substream,
1049 struct snd_soc_component *component)
1050 {
1051 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1052 unsigned int period_size = substream->runtime->period_size;
1053 unsigned int rate = substream->runtime->rate;
1054 unsigned int nsample_limit;
1055
1056 /* In bypass mode we don't need to calculate */
1057 if (!dac33->fifo_mode)
1058 return;
1059
1060 switch (dac33->fifo_mode) {
1061 case DAC33_FIFO_MODE1:
1062 /* Number of samples under i2c latency */
1063 dac33->alarm_threshold = US_TO_SAMPLES(rate,
1064 dac33->mode1_latency);
1065 nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
1066
1067 if (period_size <= dac33->alarm_threshold)
1068 /*
1069 * Configure nSamaple to number of periods,
1070 * which covers the latency requironment.
1071 */
1072 dac33->nsample = period_size *
1073 ((dac33->alarm_threshold / period_size) +
1074 ((dac33->alarm_threshold % period_size) ?
1075 1 : 0));
1076 else if (period_size > nsample_limit)
1077 dac33->nsample = nsample_limit;
1078 else
1079 dac33->nsample = period_size;
1080
1081 dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
1082 dac33->nsample);
1083 dac33->t_stamp1 = 0;
1084 dac33->t_stamp2 = 0;
1085 break;
1086 case DAC33_FIFO_MODE7:
1087 dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
1088 dac33->burst_rate) + 9;
1089 if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
1090 dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
1091 if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
1092 dac33->uthr = (DAC33_MODE7_MARGIN + 10);
1093
1094 dac33->mode7_us_to_lthr =
1095 SAMPLES_TO_US(substream->runtime->rate,
1096 dac33->uthr - DAC33_MODE7_MARGIN + 1);
1097 dac33->t_stamp1 = 0;
1098 break;
1099 default:
1100 break;
1101 }
1102
1103 }
1104
dac33_pcm_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)1105 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
1106 struct snd_soc_dai *dai)
1107 {
1108 struct snd_soc_component *component = dai->component;
1109 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1110 int ret = 0;
1111
1112 switch (cmd) {
1113 case SNDRV_PCM_TRIGGER_START:
1114 case SNDRV_PCM_TRIGGER_RESUME:
1115 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1116 if (dac33->fifo_mode) {
1117 dac33->state = DAC33_PREFILL;
1118 schedule_work(&dac33->work);
1119 }
1120 break;
1121 case SNDRV_PCM_TRIGGER_STOP:
1122 case SNDRV_PCM_TRIGGER_SUSPEND:
1123 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1124 if (dac33->fifo_mode) {
1125 dac33->state = DAC33_FLUSH;
1126 schedule_work(&dac33->work);
1127 }
1128 break;
1129 default:
1130 ret = -EINVAL;
1131 }
1132
1133 return ret;
1134 }
1135
dac33_dai_delay(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)1136 static snd_pcm_sframes_t dac33_dai_delay(
1137 struct snd_pcm_substream *substream,
1138 struct snd_soc_dai *dai)
1139 {
1140 struct snd_soc_component *component = dai->component;
1141 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1142 unsigned long long t0, t1, t_now;
1143 unsigned int time_delta, uthr;
1144 int samples_out, samples_in, samples;
1145 snd_pcm_sframes_t delay = 0;
1146 unsigned long flags;
1147
1148 switch (dac33->fifo_mode) {
1149 case DAC33_FIFO_BYPASS:
1150 break;
1151 case DAC33_FIFO_MODE1:
1152 spin_lock_irqsave(&dac33->lock, flags);
1153 t0 = dac33->t_stamp1;
1154 t1 = dac33->t_stamp2;
1155 spin_unlock_irqrestore(&dac33->lock, flags);
1156 t_now = ktime_to_us(ktime_get());
1157
1158 /* We have not started to fill the FIFO yet, delay is 0 */
1159 if (!t1)
1160 goto out;
1161
1162 if (t0 > t1) {
1163 /*
1164 * Phase 1:
1165 * After Alarm threshold, and before nSample write
1166 */
1167 time_delta = t_now - t0;
1168 samples_out = time_delta ? US_TO_SAMPLES(
1169 substream->runtime->rate,
1170 time_delta) : 0;
1171
1172 if (likely(dac33->alarm_threshold > samples_out))
1173 delay = dac33->alarm_threshold - samples_out;
1174 else
1175 delay = 0;
1176 } else if ((t_now - t1) <= dac33->mode1_us_burst) {
1177 /*
1178 * Phase 2:
1179 * After nSample write (during burst operation)
1180 */
1181 time_delta = t_now - t0;
1182 samples_out = time_delta ? US_TO_SAMPLES(
1183 substream->runtime->rate,
1184 time_delta) : 0;
1185
1186 time_delta = t_now - t1;
1187 samples_in = time_delta ? US_TO_SAMPLES(
1188 dac33->burst_rate,
1189 time_delta) : 0;
1190
1191 samples = dac33->alarm_threshold;
1192 samples += (samples_in - samples_out);
1193
1194 if (likely(samples > 0))
1195 delay = samples;
1196 else
1197 delay = 0;
1198 } else {
1199 /*
1200 * Phase 3:
1201 * After burst operation, before next alarm threshold
1202 */
1203 time_delta = t_now - t0;
1204 samples_out = time_delta ? US_TO_SAMPLES(
1205 substream->runtime->rate,
1206 time_delta) : 0;
1207
1208 samples_in = dac33->nsample;
1209 samples = dac33->alarm_threshold;
1210 samples += (samples_in - samples_out);
1211
1212 if (likely(samples > 0))
1213 delay = samples > dac33->fifo_size ?
1214 dac33->fifo_size : samples;
1215 else
1216 delay = 0;
1217 }
1218 break;
1219 case DAC33_FIFO_MODE7:
1220 spin_lock_irqsave(&dac33->lock, flags);
1221 t0 = dac33->t_stamp1;
1222 uthr = dac33->uthr;
1223 spin_unlock_irqrestore(&dac33->lock, flags);
1224 t_now = ktime_to_us(ktime_get());
1225
1226 /* We have not started to fill the FIFO yet, delay is 0 */
1227 if (!t0)
1228 goto out;
1229
1230 if (t_now <= t0) {
1231 /*
1232 * Either the timestamps are messed or equal. Report
1233 * maximum delay
1234 */
1235 delay = uthr;
1236 goto out;
1237 }
1238
1239 time_delta = t_now - t0;
1240 if (time_delta <= dac33->mode7_us_to_lthr) {
1241 /*
1242 * Phase 1:
1243 * After burst (draining phase)
1244 */
1245 samples_out = US_TO_SAMPLES(
1246 substream->runtime->rate,
1247 time_delta);
1248
1249 if (likely(uthr > samples_out))
1250 delay = uthr - samples_out;
1251 else
1252 delay = 0;
1253 } else {
1254 /*
1255 * Phase 2:
1256 * During burst operation
1257 */
1258 time_delta = time_delta - dac33->mode7_us_to_lthr;
1259
1260 samples_out = US_TO_SAMPLES(
1261 substream->runtime->rate,
1262 time_delta);
1263 samples_in = US_TO_SAMPLES(
1264 dac33->burst_rate,
1265 time_delta);
1266 delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
1267
1268 if (unlikely(delay > uthr))
1269 delay = uthr;
1270 }
1271 break;
1272 default:
1273 dev_warn(component->dev, "Unhandled FIFO mode: %d\n",
1274 dac33->fifo_mode);
1275 break;
1276 }
1277 out:
1278 return delay;
1279 }
1280
dac33_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)1281 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
1282 int clk_id, unsigned int freq, int dir)
1283 {
1284 struct snd_soc_component *component = codec_dai->component;
1285 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1286 u8 ioc_reg, asrcb_reg;
1287
1288 ioc_reg = dac33_read_reg_cache(component, DAC33_INT_OSC_CTRL);
1289 asrcb_reg = dac33_read_reg_cache(component, DAC33_ASRC_CTRL_B);
1290 switch (clk_id) {
1291 case TLV320DAC33_MCLK:
1292 ioc_reg |= DAC33_REFSEL;
1293 asrcb_reg |= DAC33_SRCREFSEL;
1294 break;
1295 case TLV320DAC33_SLEEPCLK:
1296 ioc_reg &= ~DAC33_REFSEL;
1297 asrcb_reg &= ~DAC33_SRCREFSEL;
1298 break;
1299 default:
1300 dev_err(component->dev, "Invalid clock ID (%d)\n", clk_id);
1301 break;
1302 }
1303 dac33->refclk = freq;
1304
1305 dac33_write_reg_cache(component, DAC33_INT_OSC_CTRL, ioc_reg);
1306 dac33_write_reg_cache(component, DAC33_ASRC_CTRL_B, asrcb_reg);
1307
1308 return 0;
1309 }
1310
dac33_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)1311 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1312 unsigned int fmt)
1313 {
1314 struct snd_soc_component *component = codec_dai->component;
1315 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1316 u8 aictrl_a, aictrl_b;
1317
1318 aictrl_a = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_A);
1319 aictrl_b = dac33_read_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B);
1320
1321 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
1322 case SND_SOC_DAIFMT_CBP_CFP:
1323 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1324 break;
1325 case SND_SOC_DAIFMT_CBC_CFC:
1326 if (dac33->fifo_mode) {
1327 dev_err(component->dev, "FIFO mode requires provider mode\n");
1328 return -EINVAL;
1329 } else
1330 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1331 break;
1332 default:
1333 return -EINVAL;
1334 }
1335
1336 aictrl_a &= ~DAC33_AFMT_MASK;
1337 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1338 case SND_SOC_DAIFMT_I2S:
1339 aictrl_a |= DAC33_AFMT_I2S;
1340 break;
1341 case SND_SOC_DAIFMT_DSP_A:
1342 aictrl_a |= DAC33_AFMT_DSP;
1343 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1344 aictrl_b |= DAC33_DATA_DELAY(0);
1345 break;
1346 case SND_SOC_DAIFMT_RIGHT_J:
1347 aictrl_a |= DAC33_AFMT_RIGHT_J;
1348 break;
1349 case SND_SOC_DAIFMT_LEFT_J:
1350 aictrl_a |= DAC33_AFMT_LEFT_J;
1351 break;
1352 default:
1353 dev_err(component->dev, "Unsupported format (%u)\n",
1354 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1355 return -EINVAL;
1356 }
1357
1358 dac33_write_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1359 dac33_write_reg_cache(component, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1360
1361 return 0;
1362 }
1363
dac33_soc_probe(struct snd_soc_component * component)1364 static int dac33_soc_probe(struct snd_soc_component *component)
1365 {
1366 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1367 int ret = 0;
1368
1369 dac33->component = component;
1370
1371 /* Read the tlv320dac33 ID registers */
1372 ret = dac33_hard_power(component, 1);
1373 if (ret != 0) {
1374 dev_err(component->dev, "Failed to power up component: %d\n", ret);
1375 goto err_power;
1376 }
1377 ret = dac33_read_id(component);
1378 dac33_hard_power(component, 0);
1379
1380 if (ret < 0) {
1381 dev_err(component->dev, "Failed to read chip ID: %d\n", ret);
1382 ret = -ENODEV;
1383 goto err_power;
1384 }
1385
1386 /* Check if the IRQ number is valid and request it */
1387 if (dac33->irq >= 0) {
1388 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1389 IRQF_TRIGGER_RISING,
1390 component->name, component);
1391 if (ret < 0) {
1392 dev_err(component->dev, "Could not request IRQ%d (%d)\n",
1393 dac33->irq, ret);
1394 dac33->irq = -1;
1395 }
1396 if (dac33->irq != -1) {
1397 INIT_WORK(&dac33->work, dac33_work);
1398 }
1399 }
1400
1401 /* Only add the FIFO controls, if we have valid IRQ number */
1402 if (dac33->irq >= 0)
1403 snd_soc_add_component_controls(component, dac33_mode_snd_controls,
1404 ARRAY_SIZE(dac33_mode_snd_controls));
1405
1406 err_power:
1407 return ret;
1408 }
1409
dac33_soc_remove(struct snd_soc_component * component)1410 static void dac33_soc_remove(struct snd_soc_component *component)
1411 {
1412 struct tlv320dac33_priv *dac33 = snd_soc_component_get_drvdata(component);
1413
1414 if (dac33->irq >= 0) {
1415 free_irq(dac33->irq, dac33->component);
1416 flush_work(&dac33->work);
1417 }
1418 }
1419
1420 static const struct snd_soc_component_driver soc_component_dev_tlv320dac33 = {
1421 .read = dac33_read_reg_cache,
1422 .write = dac33_write_locked,
1423 .set_bias_level = dac33_set_bias_level,
1424 .probe = dac33_soc_probe,
1425 .remove = dac33_soc_remove,
1426 .controls = dac33_snd_controls,
1427 .num_controls = ARRAY_SIZE(dac33_snd_controls),
1428 .dapm_widgets = dac33_dapm_widgets,
1429 .num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets),
1430 .dapm_routes = audio_map,
1431 .num_dapm_routes = ARRAY_SIZE(audio_map),
1432 .use_pmdown_time = 1,
1433 .endianness = 1,
1434 };
1435
1436 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1437 SNDRV_PCM_RATE_48000)
1438 #define DAC33_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
1439
1440 static const struct snd_soc_dai_ops dac33_dai_ops = {
1441 .startup = dac33_startup,
1442 .shutdown = dac33_shutdown,
1443 .hw_params = dac33_hw_params,
1444 .trigger = dac33_pcm_trigger,
1445 .delay = dac33_dai_delay,
1446 .set_sysclk = dac33_set_dai_sysclk,
1447 .set_fmt = dac33_set_dai_fmt,
1448 };
1449
1450 static struct snd_soc_dai_driver dac33_dai = {
1451 .name = "tlv320dac33-hifi",
1452 .playback = {
1453 .stream_name = "Playback",
1454 .channels_min = 2,
1455 .channels_max = 2,
1456 .rates = DAC33_RATES,
1457 .formats = DAC33_FORMATS,
1458 .sig_bits = 24,
1459 },
1460 .ops = &dac33_dai_ops,
1461 };
1462
dac33_i2c_probe(struct i2c_client * client)1463 static int dac33_i2c_probe(struct i2c_client *client)
1464 {
1465 struct tlv320dac33_platform_data *pdata;
1466 struct tlv320dac33_priv *dac33;
1467 int ret, i;
1468
1469 if (client->dev.platform_data == NULL) {
1470 dev_err(&client->dev, "Platform data not set\n");
1471 return -ENODEV;
1472 }
1473 pdata = client->dev.platform_data;
1474
1475 dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
1476 GFP_KERNEL);
1477 if (dac33 == NULL)
1478 return -ENOMEM;
1479
1480 dac33->reg_cache = devm_kmemdup(&client->dev,
1481 dac33_reg,
1482 ARRAY_SIZE(dac33_reg) * sizeof(u8),
1483 GFP_KERNEL);
1484 if (!dac33->reg_cache)
1485 return -ENOMEM;
1486
1487 dac33->i2c = client;
1488 mutex_init(&dac33->mutex);
1489 spin_lock_init(&dac33->lock);
1490
1491 i2c_set_clientdata(client, dac33);
1492
1493 dac33->power_gpio = pdata->power_gpio;
1494 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1495 dac33->keep_bclk = pdata->keep_bclk;
1496 dac33->mode1_latency = pdata->mode1_latency;
1497 if (!dac33->mode1_latency)
1498 dac33->mode1_latency = 10000; /* 10ms */
1499 dac33->irq = client->irq;
1500 /* Disable FIFO use by default */
1501 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1502
1503 /* Check if the reset GPIO number is valid and request it */
1504 if (dac33->power_gpio >= 0) {
1505 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1506 if (ret < 0) {
1507 dev_err(&client->dev,
1508 "Failed to request reset GPIO (%d)\n",
1509 dac33->power_gpio);
1510 goto err_gpio;
1511 }
1512 gpio_direction_output(dac33->power_gpio, 0);
1513 }
1514
1515 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1516 dac33->supplies[i].supply = dac33_supply_names[i];
1517
1518 ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
1519 dac33->supplies);
1520
1521 if (ret != 0) {
1522 dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
1523 goto err_get;
1524 }
1525
1526 ret = devm_snd_soc_register_component(&client->dev,
1527 &soc_component_dev_tlv320dac33, &dac33_dai, 1);
1528 if (ret < 0)
1529 goto err_get;
1530
1531 return ret;
1532 err_get:
1533 if (dac33->power_gpio >= 0)
1534 gpio_free(dac33->power_gpio);
1535 err_gpio:
1536 return ret;
1537 }
1538
dac33_i2c_remove(struct i2c_client * client)1539 static void dac33_i2c_remove(struct i2c_client *client)
1540 {
1541 struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
1542
1543 if (unlikely(dac33->chip_power))
1544 dac33_hard_power(dac33->component, 0);
1545
1546 if (dac33->power_gpio >= 0)
1547 gpio_free(dac33->power_gpio);
1548 }
1549
1550 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1551 {
1552 .name = "tlv320dac33",
1553 .driver_data = 0,
1554 },
1555 { },
1556 };
1557 MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
1558
1559 static struct i2c_driver tlv320dac33_i2c_driver = {
1560 .driver = {
1561 .name = "tlv320dac33-codec",
1562 },
1563 .probe = dac33_i2c_probe,
1564 .remove = dac33_i2c_remove,
1565 .id_table = tlv320dac33_i2c_id,
1566 };
1567
1568 module_i2c_driver(tlv320dac33_i2c_driver);
1569
1570 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1571 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
1572 MODULE_LICENSE("GPL");
1573