xref: /openbmc/linux/sound/soc/codecs/tas5720.c (revision 2f3092e7)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * tas5720.c - ALSA SoC Texas Instruments TAS5720 Mono Audio Amplifier
4  *
5  * Copyright (C)2015-2016 Texas Instruments Incorporated -  https://www.ti.com
6  *
7  * Author: Andreas Dannenberg <dannenberg@ti.com>
8  */
9 
10 #include <linux/module.h>
11 #include <linux/errno.h>
12 #include <linux/device.h>
13 #include <linux/i2c.h>
14 #include <linux/regmap.h>
15 #include <linux/slab.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/delay.h>
18 
19 #include <sound/pcm.h>
20 #include <sound/pcm_params.h>
21 #include <sound/soc.h>
22 #include <sound/soc-dapm.h>
23 #include <sound/tlv.h>
24 
25 #include "tas5720.h"
26 
27 /* Define how often to check (and clear) the fault status register (in ms) */
28 #define TAS5720_FAULT_CHECK_INTERVAL		200
29 
30 enum tas572x_type {
31 	TAS5720,
32 	TAS5720A_Q1,
33 	TAS5722,
34 };
35 
36 static const char * const tas5720_supply_names[] = {
37 	"dvdd",		/* Digital power supply. Connect to 3.3-V supply. */
38 	"pvdd",		/* Class-D amp and analog power supply (connected). */
39 };
40 
41 #define TAS5720_NUM_SUPPLIES	ARRAY_SIZE(tas5720_supply_names)
42 
43 struct tas5720_data {
44 	struct snd_soc_component *component;
45 	struct regmap *regmap;
46 	struct i2c_client *tas5720_client;
47 	enum tas572x_type devtype;
48 	struct regulator_bulk_data supplies[TAS5720_NUM_SUPPLIES];
49 	struct delayed_work fault_check_work;
50 	unsigned int last_fault;
51 };
52 
tas5720_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)53 static int tas5720_hw_params(struct snd_pcm_substream *substream,
54 			     struct snd_pcm_hw_params *params,
55 			     struct snd_soc_dai *dai)
56 {
57 	struct snd_soc_component *component = dai->component;
58 	unsigned int rate = params_rate(params);
59 	bool ssz_ds;
60 	int ret;
61 
62 	switch (rate) {
63 	case 44100:
64 	case 48000:
65 		ssz_ds = false;
66 		break;
67 	case 88200:
68 	case 96000:
69 		ssz_ds = true;
70 		break;
71 	default:
72 		dev_err(component->dev, "unsupported sample rate: %u\n", rate);
73 		return -EINVAL;
74 	}
75 
76 	ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG,
77 				  TAS5720_SSZ_DS, ssz_ds);
78 	if (ret < 0) {
79 		dev_err(component->dev, "error setting sample rate: %d\n", ret);
80 		return ret;
81 	}
82 
83 	return 0;
84 }
85 
tas5720_set_dai_fmt(struct snd_soc_dai * dai,unsigned int fmt)86 static int tas5720_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
87 {
88 	struct snd_soc_component *component = dai->component;
89 	u8 serial_format;
90 	int ret;
91 
92 	if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC) {
93 		dev_vdbg(component->dev, "DAI clocking invalid\n");
94 		return -EINVAL;
95 	}
96 
97 	switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
98 		       SND_SOC_DAIFMT_INV_MASK)) {
99 	case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
100 		/* 1st data bit occur one BCLK cycle after the frame sync */
101 		serial_format = TAS5720_SAIF_I2S;
102 		break;
103 	case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF):
104 		/*
105 		 * Note that although the TAS5720 does not have a dedicated DSP
106 		 * mode it doesn't care about the LRCLK duty cycle during TDM
107 		 * operation. Therefore we can use the device's I2S mode with
108 		 * its delaying of the 1st data bit to receive DSP_A formatted
109 		 * data. See device datasheet for additional details.
110 		 */
111 		serial_format = TAS5720_SAIF_I2S;
112 		break;
113 	case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF):
114 		/*
115 		 * Similar to DSP_A, we can use the fact that the TAS5720 does
116 		 * not care about the LRCLK duty cycle during TDM to receive
117 		 * DSP_B formatted data in LEFTJ mode (no delaying of the 1st
118 		 * data bit).
119 		 */
120 		serial_format = TAS5720_SAIF_LEFTJ;
121 		break;
122 	case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
123 		/* No delay after the frame sync */
124 		serial_format = TAS5720_SAIF_LEFTJ;
125 		break;
126 	default:
127 		dev_vdbg(component->dev, "DAI Format is not found\n");
128 		return -EINVAL;
129 	}
130 
131 	ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG,
132 				  TAS5720_SAIF_FORMAT_MASK,
133 				  serial_format);
134 	if (ret < 0) {
135 		dev_err(component->dev, "error setting SAIF format: %d\n", ret);
136 		return ret;
137 	}
138 
139 	return 0;
140 }
141 
tas5720_set_dai_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int slot_width)142 static int tas5720_set_dai_tdm_slot(struct snd_soc_dai *dai,
143 				    unsigned int tx_mask, unsigned int rx_mask,
144 				    int slots, int slot_width)
145 {
146 	struct snd_soc_component *component = dai->component;
147 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
148 	unsigned int first_slot;
149 	int ret;
150 
151 	if (!tx_mask) {
152 		dev_err(component->dev, "tx masks must not be 0\n");
153 		return -EINVAL;
154 	}
155 
156 	/*
157 	 * Determine the first slot that is being requested. We will only
158 	 * use the first slot that is found since the TAS5720 is a mono
159 	 * amplifier.
160 	 */
161 	first_slot = __ffs(tx_mask);
162 
163 	if (first_slot > 7) {
164 		dev_err(component->dev, "slot selection out of bounds (%u)\n",
165 			first_slot);
166 		return -EINVAL;
167 	}
168 
169 	/*
170 	 * Enable manual TDM slot selection (instead of I2C ID based).
171 	 * This is not applicable to TAS5720A-Q1.
172 	 */
173 	switch (tas5720->devtype) {
174 	case TAS5720A_Q1:
175 		break;
176 	default:
177 		ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL1_REG,
178 					  TAS5720_TDM_CFG_SRC, TAS5720_TDM_CFG_SRC);
179 		if (ret < 0)
180 			goto error_snd_soc_component_update_bits;
181 
182 		/* Configure the TDM slot to process audio from */
183 		ret = snd_soc_component_update_bits(component, TAS5720_DIGITAL_CTRL2_REG,
184 					  TAS5720_TDM_SLOT_SEL_MASK, first_slot);
185 		if (ret < 0)
186 			goto error_snd_soc_component_update_bits;
187 		break;
188 	}
189 
190 	/* Configure TDM slot width. This is only applicable to TAS5722. */
191 	switch (tas5720->devtype) {
192 	case TAS5722:
193 		ret = snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG,
194 						    TAS5722_TDM_SLOT_16B,
195 						    slot_width == 16 ?
196 						    TAS5722_TDM_SLOT_16B : 0);
197 		if (ret < 0)
198 			goto error_snd_soc_component_update_bits;
199 		break;
200 	default:
201 		break;
202 	}
203 
204 	return 0;
205 
206 error_snd_soc_component_update_bits:
207 	dev_err(component->dev, "error configuring TDM mode: %d\n", ret);
208 	return ret;
209 }
210 
tas5720_mute_soc_component(struct snd_soc_component * component,int mute)211 static int tas5720_mute_soc_component(struct snd_soc_component *component, int mute)
212 {
213 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
214 	unsigned int reg, mask;
215 	int ret;
216 
217 	switch (tas5720->devtype) {
218 	case TAS5720A_Q1:
219 		reg = TAS5720_Q1_VOLUME_CTRL_CFG_REG;
220 		mask = TAS5720_Q1_MUTE;
221 		break;
222 	default:
223 		reg = TAS5720_DIGITAL_CTRL2_REG;
224 		mask = TAS5720_MUTE;
225 		break;
226 	}
227 
228 	ret = snd_soc_component_update_bits(component, reg, mask, mute ? mask : 0);
229 	if (ret < 0) {
230 		dev_err(component->dev, "error (un-)muting device: %d\n", ret);
231 		return ret;
232 	}
233 
234 	return 0;
235 }
236 
tas5720_mute(struct snd_soc_dai * dai,int mute,int direction)237 static int tas5720_mute(struct snd_soc_dai *dai, int mute, int direction)
238 {
239 	return tas5720_mute_soc_component(dai->component, mute);
240 }
241 
tas5720_fault_check_work(struct work_struct * work)242 static void tas5720_fault_check_work(struct work_struct *work)
243 {
244 	struct tas5720_data *tas5720 = container_of(work, struct tas5720_data,
245 			fault_check_work.work);
246 	struct device *dev = tas5720->component->dev;
247 	unsigned int curr_fault;
248 	int ret;
249 
250 	ret = regmap_read(tas5720->regmap, TAS5720_FAULT_REG, &curr_fault);
251 	if (ret < 0) {
252 		dev_err(dev, "failed to read FAULT register: %d\n", ret);
253 		goto out;
254 	}
255 
256 	/* Check/handle all errors except SAIF clock errors */
257 	curr_fault &= TAS5720_OCE | TAS5720_DCE | TAS5720_OTE;
258 
259 	/*
260 	 * Only flag errors once for a given occurrence. This is needed as
261 	 * the TAS5720 will take time clearing the fault condition internally
262 	 * during which we don't want to bombard the system with the same
263 	 * error message over and over.
264 	 */
265 	if ((curr_fault & TAS5720_OCE) && !(tas5720->last_fault & TAS5720_OCE))
266 		dev_crit(dev, "experienced an over current hardware fault\n");
267 
268 	if ((curr_fault & TAS5720_DCE) && !(tas5720->last_fault & TAS5720_DCE))
269 		dev_crit(dev, "experienced a DC detection fault\n");
270 
271 	if ((curr_fault & TAS5720_OTE) && !(tas5720->last_fault & TAS5720_OTE))
272 		dev_crit(dev, "experienced an over temperature fault\n");
273 
274 	/* Store current fault value so we can detect any changes next time */
275 	tas5720->last_fault = curr_fault;
276 
277 	if (!curr_fault)
278 		goto out;
279 
280 	/*
281 	 * Periodically toggle SDZ (shutdown bit) H->L->H to clear any latching
282 	 * faults as long as a fault condition persists. Always going through
283 	 * the full sequence no matter the first return value to minimizes
284 	 * chances for the device to end up in shutdown mode.
285 	 */
286 	ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
287 				TAS5720_SDZ, 0);
288 	if (ret < 0)
289 		dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);
290 
291 	ret = regmap_write_bits(tas5720->regmap, TAS5720_POWER_CTRL_REG,
292 				TAS5720_SDZ, TAS5720_SDZ);
293 	if (ret < 0)
294 		dev_err(dev, "failed to write POWER_CTRL register: %d\n", ret);
295 
296 out:
297 	/* Schedule the next fault check at the specified interval */
298 	schedule_delayed_work(&tas5720->fault_check_work,
299 			      msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
300 }
301 
tas5720_codec_probe(struct snd_soc_component * component)302 static int tas5720_codec_probe(struct snd_soc_component *component)
303 {
304 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
305 	unsigned int device_id, expected_device_id;
306 	int ret;
307 
308 	tas5720->component = component;
309 
310 	ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
311 				    tas5720->supplies);
312 	if (ret != 0) {
313 		dev_err(component->dev, "failed to enable supplies: %d\n", ret);
314 		return ret;
315 	}
316 
317 	/*
318 	 * Take a liberal approach to checking the device ID to allow the
319 	 * driver to be used even if the device ID does not match, however
320 	 * issue a warning if there is a mismatch.
321 	 */
322 	ret = regmap_read(tas5720->regmap, TAS5720_DEVICE_ID_REG, &device_id);
323 	if (ret < 0) {
324 		dev_err(component->dev, "failed to read device ID register: %d\n",
325 			ret);
326 		goto probe_fail;
327 	}
328 
329 	switch (tas5720->devtype) {
330 	case TAS5720:
331 		expected_device_id = TAS5720_DEVICE_ID;
332 		break;
333 	case TAS5720A_Q1:
334 		expected_device_id = TAS5720A_Q1_DEVICE_ID;
335 		break;
336 	case TAS5722:
337 		expected_device_id = TAS5722_DEVICE_ID;
338 		break;
339 	default:
340 		dev_err(component->dev, "unexpected private driver data\n");
341 		ret = -EINVAL;
342 		goto probe_fail;
343 	}
344 
345 	if (device_id != expected_device_id)
346 		dev_warn(component->dev, "wrong device ID. expected: %u read: %u\n",
347 			 expected_device_id, device_id);
348 
349 	/* Set device to mute */
350 	ret = tas5720_mute_soc_component(component, 1);
351 	if (ret < 0)
352 		goto error_snd_soc_component_update_bits;
353 
354 	/* Set Bit 7 in TAS5720_ANALOG_CTRL_REG to 1 for TAS5720A_Q1 */
355 	switch (tas5720->devtype) {
356 	case TAS5720A_Q1:
357 		ret = snd_soc_component_update_bits(component, TAS5720_ANALOG_CTRL_REG,
358 						    TAS5720_Q1_RESERVED7_BIT,
359 						    TAS5720_Q1_RESERVED7_BIT);
360 		break;
361 	default:
362 		break;
363 	}
364 	if (ret < 0)
365 		goto error_snd_soc_component_update_bits;
366 
367 	/*
368 	 * Enter shutdown mode - our default when not playing audio - to
369 	 * minimize current consumption. On the TAS5720 there is no real down
370 	 * side doing so as all device registers are preserved and the wakeup
371 	 * of the codec is rather quick which we do using a dapm widget.
372 	 */
373 	ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG,
374 				  TAS5720_SDZ, 0);
375 	if (ret < 0)
376 		goto error_snd_soc_component_update_bits;
377 
378 	INIT_DELAYED_WORK(&tas5720->fault_check_work, tas5720_fault_check_work);
379 
380 	return 0;
381 
382 error_snd_soc_component_update_bits:
383 	dev_err(component->dev, "error configuring device registers: %d\n", ret);
384 
385 probe_fail:
386 	regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
387 			       tas5720->supplies);
388 	return ret;
389 }
390 
tas5720_codec_remove(struct snd_soc_component * component)391 static void tas5720_codec_remove(struct snd_soc_component *component)
392 {
393 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
394 	int ret;
395 
396 	cancel_delayed_work_sync(&tas5720->fault_check_work);
397 
398 	ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
399 				     tas5720->supplies);
400 	if (ret < 0)
401 		dev_err(component->dev, "failed to disable supplies: %d\n", ret);
402 };
403 
tas5720_dac_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)404 static int tas5720_dac_event(struct snd_soc_dapm_widget *w,
405 			     struct snd_kcontrol *kcontrol, int event)
406 {
407 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
408 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
409 	int ret;
410 
411 	if (event & SND_SOC_DAPM_POST_PMU) {
412 		/* Take TAS5720 out of shutdown mode */
413 		ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG,
414 					  TAS5720_SDZ, TAS5720_SDZ);
415 		if (ret < 0) {
416 			dev_err(component->dev, "error waking component: %d\n", ret);
417 			return ret;
418 		}
419 
420 		/*
421 		 * Observe codec shutdown-to-active time. The datasheet only
422 		 * lists a nominal value however just use-it as-is without
423 		 * additional padding to minimize the delay introduced in
424 		 * starting to play audio (actually there is other setup done
425 		 * by the ASoC framework that will provide additional delays,
426 		 * so we should always be safe).
427 		 */
428 		msleep(25);
429 
430 		/* Turn on TAS5720 periodic fault checking/handling */
431 		tas5720->last_fault = 0;
432 		schedule_delayed_work(&tas5720->fault_check_work,
433 				msecs_to_jiffies(TAS5720_FAULT_CHECK_INTERVAL));
434 	} else if (event & SND_SOC_DAPM_PRE_PMD) {
435 		/* Disable TAS5720 periodic fault checking/handling */
436 		cancel_delayed_work_sync(&tas5720->fault_check_work);
437 
438 		/* Place TAS5720 in shutdown mode to minimize current draw */
439 		ret = snd_soc_component_update_bits(component, TAS5720_POWER_CTRL_REG,
440 					  TAS5720_SDZ, 0);
441 		if (ret < 0) {
442 			dev_err(component->dev, "error shutting down component: %d\n",
443 				ret);
444 			return ret;
445 		}
446 	}
447 
448 	return 0;
449 }
450 
451 #ifdef CONFIG_PM
tas5720_suspend(struct snd_soc_component * component)452 static int tas5720_suspend(struct snd_soc_component *component)
453 {
454 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
455 	int ret;
456 
457 	regcache_cache_only(tas5720->regmap, true);
458 	regcache_mark_dirty(tas5720->regmap);
459 
460 	ret = regulator_bulk_disable(ARRAY_SIZE(tas5720->supplies),
461 				     tas5720->supplies);
462 	if (ret < 0)
463 		dev_err(component->dev, "failed to disable supplies: %d\n", ret);
464 
465 	return ret;
466 }
467 
tas5720_resume(struct snd_soc_component * component)468 static int tas5720_resume(struct snd_soc_component *component)
469 {
470 	struct tas5720_data *tas5720 = snd_soc_component_get_drvdata(component);
471 	int ret;
472 
473 	ret = regulator_bulk_enable(ARRAY_SIZE(tas5720->supplies),
474 				    tas5720->supplies);
475 	if (ret < 0) {
476 		dev_err(component->dev, "failed to enable supplies: %d\n", ret);
477 		return ret;
478 	}
479 
480 	regcache_cache_only(tas5720->regmap, false);
481 
482 	ret = regcache_sync(tas5720->regmap);
483 	if (ret < 0) {
484 		dev_err(component->dev, "failed to sync regcache: %d\n", ret);
485 		return ret;
486 	}
487 
488 	return 0;
489 }
490 #else
491 #define tas5720_suspend NULL
492 #define tas5720_resume NULL
493 #endif
494 
tas5720_is_volatile_reg(struct device * dev,unsigned int reg)495 static bool tas5720_is_volatile_reg(struct device *dev, unsigned int reg)
496 {
497 	switch (reg) {
498 	case TAS5720_DEVICE_ID_REG:
499 	case TAS5720_FAULT_REG:
500 		return true;
501 	default:
502 		return false;
503 	}
504 }
505 
506 static const struct regmap_config tas5720_regmap_config = {
507 	.reg_bits = 8,
508 	.val_bits = 8,
509 
510 	.max_register = TAS5720_MAX_REG,
511 	.cache_type = REGCACHE_RBTREE,
512 	.volatile_reg = tas5720_is_volatile_reg,
513 };
514 
515 static const struct regmap_config tas5720a_q1_regmap_config = {
516 	.reg_bits = 8,
517 	.val_bits = 8,
518 
519 	.max_register = TAS5720_MAX_REG,
520 	.cache_type = REGCACHE_RBTREE,
521 	.volatile_reg = tas5720_is_volatile_reg,
522 };
523 
524 static const struct regmap_config tas5722_regmap_config = {
525 	.reg_bits = 8,
526 	.val_bits = 8,
527 
528 	.max_register = TAS5722_MAX_REG,
529 	.cache_type = REGCACHE_RBTREE,
530 	.volatile_reg = tas5720_is_volatile_reg,
531 };
532 
533 /*
534  * DAC analog gain. There are four discrete values to select from, ranging
535  * from 19.2 dB to 26.3dB.
536  */
537 static const DECLARE_TLV_DB_RANGE(dac_analog_tlv,
538 	0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0),
539 	0x1, 0x1, TLV_DB_SCALE_ITEM(2070, 0, 0),
540 	0x2, 0x2, TLV_DB_SCALE_ITEM(2350, 0, 0),
541 	0x3, 0x3, TLV_DB_SCALE_ITEM(2630, 0, 0),
542 );
543 
544 /*
545  * DAC analog gain for TAS5720A-Q1. There are three discrete values to select from, ranging
546  * from 19.2 dB to 25.0dB.
547  */
548 static const DECLARE_TLV_DB_RANGE(dac_analog_tlv_a_q1,
549 	0x0, 0x0, TLV_DB_SCALE_ITEM(1920, 0, 0),
550 	0x1, 0x1, TLV_DB_SCALE_ITEM(2260, 0, 0),
551 	0x2, 0x2, TLV_DB_SCALE_ITEM(2500, 0, 0),
552 );
553 
554 /*
555  * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB or 0.25 dB steps
556  * depending on the device. Note that setting the gain below -100 dB
557  * (register value <0x7) is effectively a MUTE as per device datasheet.
558  *
559  * Note that for the TAS5722 the digital volume controls are actually split
560  * over two registers, so we need custom getters/setters for access.
561  */
562 static DECLARE_TLV_DB_SCALE(tas5720_dac_tlv, -10350, 50, 0);
563 static DECLARE_TLV_DB_SCALE(tas5722_dac_tlv, -10350, 25, 0);
564 
tas5722_volume_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)565 static int tas5722_volume_get(struct snd_kcontrol *kcontrol,
566 			      struct snd_ctl_elem_value *ucontrol)
567 {
568 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
569 	unsigned int val;
570 
571 	val = snd_soc_component_read(component, TAS5720_VOLUME_CTRL_REG);
572 	ucontrol->value.integer.value[0] = val << 1;
573 
574 	val = snd_soc_component_read(component, TAS5722_DIGITAL_CTRL2_REG);
575 	ucontrol->value.integer.value[0] |= val & TAS5722_VOL_CONTROL_LSB;
576 
577 	return 0;
578 }
579 
tas5722_volume_set(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)580 static int tas5722_volume_set(struct snd_kcontrol *kcontrol,
581 			      struct snd_ctl_elem_value *ucontrol)
582 {
583 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
584 	unsigned int sel = ucontrol->value.integer.value[0];
585 
586 	snd_soc_component_write(component, TAS5720_VOLUME_CTRL_REG, sel >> 1);
587 	snd_soc_component_update_bits(component, TAS5722_DIGITAL_CTRL2_REG,
588 				      TAS5722_VOL_CONTROL_LSB, sel);
589 
590 	return 0;
591 }
592 
593 static const struct snd_kcontrol_new tas5720_snd_controls[] = {
594 	SOC_SINGLE_TLV("Speaker Driver Playback Volume",
595 		       TAS5720_VOLUME_CTRL_REG, 0, 0xff, 0, tas5720_dac_tlv),
596 	SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
597 		       TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
598 };
599 
600 static const struct snd_kcontrol_new tas5720a_q1_snd_controls[] = {
601 	SOC_DOUBLE_R_TLV("Speaker Driver Playback Volume",
602 				TAS5720_Q1_VOLUME_CTRL_LEFT_REG,
603 				TAS5720_Q1_VOLUME_CTRL_RIGHT_REG,
604 				0, 0xff, 0, tas5720_dac_tlv),
605 	SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
606 				TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv_a_q1),
607 };
608 
609 static const struct snd_kcontrol_new tas5722_snd_controls[] = {
610 	SOC_SINGLE_EXT_TLV("Speaker Driver Playback Volume",
611 			   0, 0, 511, 0,
612 			   tas5722_volume_get, tas5722_volume_set,
613 			   tas5722_dac_tlv),
614 	SOC_SINGLE_TLV("Speaker Driver Analog Gain", TAS5720_ANALOG_CTRL_REG,
615 		       TAS5720_ANALOG_GAIN_SHIFT, 3, 0, dac_analog_tlv),
616 };
617 
618 static const struct snd_soc_dapm_widget tas5720_dapm_widgets[] = {
619 	SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),
620 	SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas5720_dac_event,
621 			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
622 	SND_SOC_DAPM_OUTPUT("OUT")
623 };
624 
625 static const struct snd_soc_dapm_route tas5720_audio_map[] = {
626 	{ "DAC", NULL, "DAC IN" },
627 	{ "OUT", NULL, "DAC" },
628 };
629 
630 static const struct snd_soc_component_driver soc_component_dev_tas5720 = {
631 	.probe			= tas5720_codec_probe,
632 	.remove			= tas5720_codec_remove,
633 	.suspend		= tas5720_suspend,
634 	.resume			= tas5720_resume,
635 	.controls		= tas5720_snd_controls,
636 	.num_controls		= ARRAY_SIZE(tas5720_snd_controls),
637 	.dapm_widgets		= tas5720_dapm_widgets,
638 	.num_dapm_widgets	= ARRAY_SIZE(tas5720_dapm_widgets),
639 	.dapm_routes		= tas5720_audio_map,
640 	.num_dapm_routes	= ARRAY_SIZE(tas5720_audio_map),
641 	.idle_bias_on		= 1,
642 	.use_pmdown_time	= 1,
643 	.endianness		= 1,
644 };
645 
646 static const struct snd_soc_component_driver soc_component_dev_tas5720_a_q1 = {
647 	.probe			= tas5720_codec_probe,
648 	.remove			= tas5720_codec_remove,
649 	.suspend		= tas5720_suspend,
650 	.resume			= tas5720_resume,
651 	.controls		= tas5720a_q1_snd_controls,
652 	.num_controls		= ARRAY_SIZE(tas5720a_q1_snd_controls),
653 	.dapm_widgets		= tas5720_dapm_widgets,
654 	.num_dapm_widgets	= ARRAY_SIZE(tas5720_dapm_widgets),
655 	.dapm_routes		= tas5720_audio_map,
656 	.num_dapm_routes	= ARRAY_SIZE(tas5720_audio_map),
657 	.idle_bias_on		= 1,
658 	.use_pmdown_time	= 1,
659 	.endianness		= 1,
660 };
661 
662 static const struct snd_soc_component_driver soc_component_dev_tas5722 = {
663 	.probe = tas5720_codec_probe,
664 	.remove = tas5720_codec_remove,
665 	.suspend = tas5720_suspend,
666 	.resume = tas5720_resume,
667 	.controls = tas5722_snd_controls,
668 	.num_controls = ARRAY_SIZE(tas5722_snd_controls),
669 	.dapm_widgets = tas5720_dapm_widgets,
670 	.num_dapm_widgets = ARRAY_SIZE(tas5720_dapm_widgets),
671 	.dapm_routes = tas5720_audio_map,
672 	.num_dapm_routes = ARRAY_SIZE(tas5720_audio_map),
673 	.idle_bias_on		= 1,
674 	.use_pmdown_time	= 1,
675 	.endianness		= 1,
676 };
677 
678 /* PCM rates supported by the TAS5720 driver */
679 #define TAS5720_RATES	(SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
680 			 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
681 
682 /* Formats supported by TAS5720 driver */
683 #define TAS5720_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |\
684 			 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE)
685 
686 static const struct snd_soc_dai_ops tas5720_speaker_dai_ops = {
687 	.hw_params	= tas5720_hw_params,
688 	.set_fmt	= tas5720_set_dai_fmt,
689 	.set_tdm_slot	= tas5720_set_dai_tdm_slot,
690 	.mute_stream	= tas5720_mute,
691 	.no_capture_mute = 1,
692 };
693 
694 /*
695  * TAS5720 DAI structure
696  *
697  * Note that were are advertising .playback.channels_max = 2 despite this being
698  * a mono amplifier. The reason for that is that some serial ports such as TI's
699  * McASP module have a minimum number of channels (2) that they can output.
700  * Advertising more channels than we have will allow us to interface with such
701  * a serial port without really any negative side effects as the TAS5720 will
702  * simply ignore any extra channel(s) asides from the one channel that is
703  * configured to be played back.
704  */
705 static struct snd_soc_dai_driver tas5720_dai[] = {
706 	{
707 		.name = "tas5720-amplifier",
708 		.playback = {
709 			.stream_name = "Playback",
710 			.channels_min = 1,
711 			.channels_max = 2,
712 			.rates = TAS5720_RATES,
713 			.formats = TAS5720_FORMATS,
714 		},
715 		.ops = &tas5720_speaker_dai_ops,
716 	},
717 };
718 
719 static const struct i2c_device_id tas5720_id[] = {
720 	{ "tas5720", TAS5720 },
721 	{ "tas5720a-q1", TAS5720A_Q1 },
722 	{ "tas5722", TAS5722 },
723 	{ }
724 };
725 MODULE_DEVICE_TABLE(i2c, tas5720_id);
726 
tas5720_probe(struct i2c_client * client)727 static int tas5720_probe(struct i2c_client *client)
728 {
729 	struct device *dev = &client->dev;
730 	struct tas5720_data *data;
731 	const struct regmap_config *regmap_config;
732 	const struct i2c_device_id *id;
733 	int ret;
734 	int i;
735 
736 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
737 	if (!data)
738 		return -ENOMEM;
739 
740 	id = i2c_match_id(tas5720_id, client);
741 	data->tas5720_client = client;
742 	data->devtype = id->driver_data;
743 
744 	switch (id->driver_data) {
745 	case TAS5720:
746 		regmap_config = &tas5720_regmap_config;
747 		break;
748 	case TAS5720A_Q1:
749 		regmap_config = &tas5720a_q1_regmap_config;
750 		break;
751 	case TAS5722:
752 		regmap_config = &tas5722_regmap_config;
753 		break;
754 	default:
755 		dev_err(dev, "unexpected private driver data\n");
756 		return -EINVAL;
757 	}
758 	data->regmap = devm_regmap_init_i2c(client, regmap_config);
759 	if (IS_ERR(data->regmap)) {
760 		ret = PTR_ERR(data->regmap);
761 		dev_err(dev, "failed to allocate register map: %d\n", ret);
762 		return ret;
763 	}
764 
765 	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
766 		data->supplies[i].supply = tas5720_supply_names[i];
767 
768 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
769 				      data->supplies);
770 	if (ret != 0) {
771 		dev_err(dev, "failed to request supplies: %d\n", ret);
772 		return ret;
773 	}
774 
775 	dev_set_drvdata(dev, data);
776 
777 	switch (id->driver_data) {
778 	case TAS5720:
779 		ret = devm_snd_soc_register_component(&client->dev,
780 					&soc_component_dev_tas5720,
781 					tas5720_dai,
782 					ARRAY_SIZE(tas5720_dai));
783 		break;
784 	case TAS5720A_Q1:
785 		ret = devm_snd_soc_register_component(&client->dev,
786 					&soc_component_dev_tas5720_a_q1,
787 					tas5720_dai,
788 					ARRAY_SIZE(tas5720_dai));
789 		break;
790 	case TAS5722:
791 		ret = devm_snd_soc_register_component(&client->dev,
792 					&soc_component_dev_tas5722,
793 					tas5720_dai,
794 					ARRAY_SIZE(tas5720_dai));
795 		break;
796 	default:
797 		dev_err(dev, "unexpected private driver data\n");
798 		return -EINVAL;
799 	}
800 	if (ret < 0) {
801 		dev_err(dev, "failed to register component: %d\n", ret);
802 		return ret;
803 	}
804 
805 	return 0;
806 }
807 
808 #if IS_ENABLED(CONFIG_OF)
809 static const struct of_device_id tas5720_of_match[] = {
810 	{ .compatible = "ti,tas5720", },
811 	{ .compatible = "ti,tas5720a-q1", },
812 	{ .compatible = "ti,tas5722", },
813 	{ },
814 };
815 MODULE_DEVICE_TABLE(of, tas5720_of_match);
816 #endif
817 
818 static struct i2c_driver tas5720_i2c_driver = {
819 	.driver = {
820 		.name = "tas5720",
821 		.of_match_table = of_match_ptr(tas5720_of_match),
822 	},
823 	.probe = tas5720_probe,
824 	.id_table = tas5720_id,
825 };
826 
827 module_i2c_driver(tas5720_i2c_driver);
828 
829 MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
830 MODULE_DESCRIPTION("TAS5720 Audio amplifier driver");
831 MODULE_LICENSE("GPL");
832