tas2770.c

  1// SPDX-License-Identifier: GPL-2.0
  2//
  3// ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D
  4// Audio Amplifier with Speaker I/V Sense
  5//
  6// Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
  7//	Author: Tracy Yi <tracy-yi@ti.com>
  8//	Frank Shi <shifu0704@thundersoft.com>
  9
 10#include <linux/module.h>
 11#include <linux/moduleparam.h>
 12#include <linux/err.h>
 13#include <linux/init.h>
 14#include <linux/delay.h>
 15#include <linux/hwmon.h>
 16#include <linux/pm.h>
 17#include <linux/i2c.h>
 18#include <linux/gpio/consumer.h>
 19#include <linux/regulator/consumer.h>
 20#include <linux/firmware.h>
 21#include <linux/regmap.h>
 22#include <linux/of.h>
 23#include <linux/slab.h>
 24#include <sound/soc.h>
 25#include <sound/pcm.h>
 26#include <sound/pcm_params.h>
 27#include <sound/initval.h>
 28#include <sound/tlv.h>
 29
 30#include "tas2770.h"
 31
 32#define TAS2770_MDELAY 0xFFFFFFFE
 33
 34static void tas2770_reset(struct tas2770_priv *tas2770)
 35{
 36	if (tas2770->reset_gpio) {
 37		gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
 38		msleep(20);
 39		gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
 40		usleep_range(1000, 2000);
 41	}
 42
 43	snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
 44		TAS2770_RST);
 45	usleep_range(1000, 2000);
 46}
 47
 48static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770)
 49{
 50	struct snd_soc_component *component = tas2770->component;
 51	unsigned int val;
 52	int ret;
 53
 54	if (tas2770->dac_powered)
 55		val = tas2770->unmuted ?
 56			TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE;
 57	else
 58		val = TAS2770_PWR_CTRL_SHUTDOWN;
 59
 60	ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 61					    TAS2770_PWR_CTRL_MASK, val);
 62	if (ret < 0)
 63		return ret;
 64
 65	return 0;
 66}
 67
 68#ifdef CONFIG_PM
 69static int tas2770_codec_suspend(struct snd_soc_component *component)
 70{
 71	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
 72	int ret = 0;
 73
 74	regcache_cache_only(tas2770->regmap, true);
 75	regcache_mark_dirty(tas2770->regmap);
 76
 77	if (tas2770->sdz_gpio) {
 78		gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
 79	} else {
 80		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
 81						    TAS2770_PWR_CTRL_MASK,
 82						    TAS2770_PWR_CTRL_SHUTDOWN);
 83		if (ret < 0) {
 84			regcache_cache_only(tas2770->regmap, false);
 85			regcache_sync(tas2770->regmap);
 86			return ret;
 87		}
 88
 89		ret = 0;
 90	}
 91
 92	return ret;
 93}
 94
 95static int tas2770_codec_resume(struct snd_soc_component *component)
 96{
 97	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
 98	int ret;
 99
100	if (tas2770->sdz_gpio) {
101		gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
102		usleep_range(1000, 2000);
103	} else {
104		ret = tas2770_update_pwr_ctrl(tas2770);
105		if (ret < 0)
106			return ret;
107	}
108
109	regcache_cache_only(tas2770->regmap, false);
110
111	return regcache_sync(tas2770->regmap);
112}
113#else
114#define tas2770_codec_suspend NULL
115#define tas2770_codec_resume NULL
116#endif
117
118static const char * const tas2770_ASI1_src[] = {
119	"I2C offset", "Left", "Right", "LeftRightDiv2",
120};
121
122static SOC_ENUM_SINGLE_DECL(
123	tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
124	4, tas2770_ASI1_src);
125
126static const struct snd_kcontrol_new tas2770_asi1_mux =
127	SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
128
129static int tas2770_dac_event(struct snd_soc_dapm_widget *w,
130			     struct snd_kcontrol *kcontrol, int event)
131{
132	struct snd_soc_component *component =
133			snd_soc_dapm_to_component(w->dapm);
134	struct tas2770_priv *tas2770 =
135			snd_soc_component_get_drvdata(component);
136	int ret;
137
138	switch (event) {
139	case SND_SOC_DAPM_POST_PMU:
140		tas2770->dac_powered = 1;
141		ret = tas2770_update_pwr_ctrl(tas2770);
142		break;
143	case SND_SOC_DAPM_PRE_PMD:
144		tas2770->dac_powered = 0;
145		ret = tas2770_update_pwr_ctrl(tas2770);
146		break;
147	default:
148		dev_err(tas2770->dev, "Not supported evevt\n");
149		return -EINVAL;
150	}
151
152	return ret;
153}
154
155static const struct snd_kcontrol_new isense_switch =
156	SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
157static const struct snd_kcontrol_new vsense_switch =
158	SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
159
160static int sense_event(struct snd_soc_dapm_widget *w,
161			struct snd_kcontrol *kcontrol, int event)
162{
163	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
164	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
165
166	/*
167	 * Powering up ISENSE/VSENSE requires a trip through the shutdown state.
168	 * Do that here to ensure that our changes are applied properly, otherwise
169	 * we might end up with non-functional IVSENSE if playback started earlier,
170	 * which would break software speaker protection.
171	 */
172	switch (event) {
173	case SND_SOC_DAPM_PRE_REG:
174		return snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
175						    TAS2770_PWR_CTRL_MASK,
176						    TAS2770_PWR_CTRL_SHUTDOWN);
177	case SND_SOC_DAPM_POST_REG:
178		return tas2770_update_pwr_ctrl(tas2770);
179	default:
180		return 0;
181	}
182}
183
184static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
185	SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
186	SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
187	SND_SOC_DAPM_SWITCH_E("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch,
188		sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG),
189	SND_SOC_DAPM_SWITCH_E("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch,
190		sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG),
191	SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
192			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
193	SND_SOC_DAPM_OUTPUT("OUT"),
194	SND_SOC_DAPM_SIGGEN("VMON"),
195	SND_SOC_DAPM_SIGGEN("IMON")
196};
197
198static const struct snd_soc_dapm_route tas2770_audio_map[] = {
199	{"ASI1 Sel", "I2C offset", "ASI1"},
200	{"ASI1 Sel", "Left", "ASI1"},
201	{"ASI1 Sel", "Right", "ASI1"},
202	{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
203	{"DAC", NULL, "ASI1 Sel"},
204	{"OUT", NULL, "DAC"},
205	{"ISENSE", "Switch", "IMON"},
206	{"VSENSE", "Switch", "VMON"},
207};
208
209static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
210{
211	struct snd_soc_component *component = dai->component;
212	struct tas2770_priv *tas2770 =
213			snd_soc_component_get_drvdata(component);
214
215	tas2770->unmuted = !mute;
216	return tas2770_update_pwr_ctrl(tas2770);
217}
218
219static int tas2770_set_ivsense_transmit(struct tas2770_priv *tas2770,
220					int i_slot, int v_slot)
221{
222	struct snd_soc_component *component = tas2770->component;
223	int ret;
224
225	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
226					    TAS2770_TDM_CFG_REG5_VSNS_MASK |
227					    TAS2770_TDM_CFG_REG5_50_MASK,
228					    TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
229					    v_slot);
230	if (ret < 0)
231		return ret;
232
233	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
234					    TAS2770_TDM_CFG_REG6_ISNS_MASK |
235					    TAS2770_TDM_CFG_REG6_50_MASK,
236					    TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
237					    i_slot);
238	if (ret < 0)
239		return ret;
240
241	return 0;
242}
243
244static int tas2770_set_pdm_transmit(struct tas2770_priv *tas2770, int slot)
245{
246	struct snd_soc_component *component = tas2770->component;
247	int ret;
248
249	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG7,
250					    TAS2770_TDM_CFG_REG7_PDM_MASK |
251					    TAS2770_TDM_CFG_REG7_50_MASK,
252					    TAS2770_TDM_CFG_REG7_PDM_ENABLE |
253					    slot);
254	return ret;
255}
256
257static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
258{
259	int ret;
260	struct snd_soc_component *component = tas2770->component;
261
262	switch (bitwidth) {
263	case SNDRV_PCM_FORMAT_S16_LE:
264		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
265						    TAS2770_TDM_CFG_REG2_RXW_MASK,
266						    TAS2770_TDM_CFG_REG2_RXW_16BITS);
267		break;
268	case SNDRV_PCM_FORMAT_S24_LE:
269		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
270						    TAS2770_TDM_CFG_REG2_RXW_MASK,
271						    TAS2770_TDM_CFG_REG2_RXW_24BITS);
272		break;
273	case SNDRV_PCM_FORMAT_S32_LE:
274		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
275						    TAS2770_TDM_CFG_REG2_RXW_MASK,
276						    TAS2770_TDM_CFG_REG2_RXW_32BITS);
277		break;
278
279	default:
280		return -EINVAL;
281	}
282
283	if (ret < 0)
284		return ret;
285
286	return 0;
287}
288
289static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
290{
291	struct snd_soc_component *component = tas2770->component;
292	int ramp_rate_val;
293	int ret;
294
295	switch (samplerate) {
296	case 48000:
297		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
298				TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
299		break;
300	case 44100:
301		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
302				TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
303		break;
304	case 96000:
305		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
306				TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
307		break;
308	case 88200:
309		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
310				TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
311		break;
312	case 192000:
313		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
314				TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
315		break;
316	case 176400:
317		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
318				TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
319		break;
320	default:
321		return -EINVAL;
322	}
323
324	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
325					    TAS2770_TDM_CFG_REG0_SMP_MASK |
326					    TAS2770_TDM_CFG_REG0_31_MASK,
327					    ramp_rate_val);
328	if (ret < 0)
329		return ret;
330
331	return 0;
332}
333
334static int tas2770_hw_params(struct snd_pcm_substream *substream,
335			     struct snd_pcm_hw_params *params,
336			     struct snd_soc_dai *dai)
337{
338	struct snd_soc_component *component = dai->component;
339	struct tas2770_priv *tas2770 =
340			snd_soc_component_get_drvdata(component);
341	int ret;
342
343	ret = tas2770_set_bitwidth(tas2770, params_format(params));
344	if (ret)
345		return ret;
346
347	return tas2770_set_samplerate(tas2770, params_rate(params));
348}
349
350static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
351{
352	struct snd_soc_component *component = dai->component;
353	struct tas2770_priv *tas2770 =
354			snd_soc_component_get_drvdata(component);
355	u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0;
356	int ret;
357
358	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
359	case SND_SOC_DAIFMT_CBC_CFC:
360		break;
361	default:
362		dev_err(tas2770->dev, "ASI invalid DAI clocking\n");
363		return -EINVAL;
364	}
365
366	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
367	case SND_SOC_DAIFMT_NB_IF:
368		invert_fpol = 1;
369		fallthrough;
370	case SND_SOC_DAIFMT_NB_NF:
371		asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
372		break;
373	case SND_SOC_DAIFMT_IB_IF:
374		invert_fpol = 1;
375		fallthrough;
376	case SND_SOC_DAIFMT_IB_NF:
377		asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
378		break;
379	default:
380		dev_err(tas2770->dev, "ASI format Inverse is not found\n");
381		return -EINVAL;
382	}
383
384	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
385					    TAS2770_TDM_CFG_REG1_RX_MASK,
386					    asi_cfg_1);
387	if (ret < 0)
388		return ret;
389
390	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
391	case SND_SOC_DAIFMT_I2S:
392		tdm_rx_start_slot = 1;
393		fpol_preinv = 0;
394		break;
395	case SND_SOC_DAIFMT_DSP_A:
396		tdm_rx_start_slot = 0;
397		fpol_preinv = 1;
398		break;
399	case SND_SOC_DAIFMT_DSP_B:
400		tdm_rx_start_slot = 1;
401		fpol_preinv = 1;
402		break;
403	case SND_SOC_DAIFMT_LEFT_J:
404		tdm_rx_start_slot = 0;
405		fpol_preinv = 1;
406		break;
407	default:
408		dev_err(tas2770->dev,
409			"DAI Format is not found, fmt=0x%x\n", fmt);
410		return -EINVAL;
411	}
412
413	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
414					    TAS2770_TDM_CFG_REG1_MASK,
415					    (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
416	if (ret < 0)
417		return ret;
418
419	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
420					    TAS2770_TDM_CFG_REG0_FPOL_MASK,
421					    (fpol_preinv ^ invert_fpol)
422					     ? TAS2770_TDM_CFG_REG0_FPOL_RSING
423					     : TAS2770_TDM_CFG_REG0_FPOL_FALING);
424	if (ret < 0)
425		return ret;
426
427	return 0;
428}
429
430static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
431				unsigned int tx_mask,
432				unsigned int rx_mask,
433				int slots, int slot_width)
434{
435	struct snd_soc_component *component = dai->component;
436	int left_slot, right_slot;
437	int ret;
438
439	if (tx_mask == 0 || rx_mask != 0)
440		return -EINVAL;
441
442	left_slot = __ffs(tx_mask);
443	tx_mask &= ~(1 << left_slot);
444	if (tx_mask == 0) {
445		right_slot = left_slot;
446	} else {
447		right_slot = __ffs(tx_mask);
448		tx_mask &= ~(1 << right_slot);
449	}
450
451	if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
452		return -EINVAL;
453
454	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
455					    TAS2770_TDM_CFG_REG3_30_MASK,
456					    (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
457	if (ret < 0)
458		return ret;
459	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
460					    TAS2770_TDM_CFG_REG3_RXS_MASK,
461					    (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
462	if (ret < 0)
463		return ret;
464
465	switch (slot_width) {
466	case 16:
467		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
468						    TAS2770_TDM_CFG_REG2_RXS_MASK,
469						    TAS2770_TDM_CFG_REG2_RXS_16BITS);
470		break;
471	case 24:
472		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
473						    TAS2770_TDM_CFG_REG2_RXS_MASK,
474						    TAS2770_TDM_CFG_REG2_RXS_24BITS);
475		break;
476	case 32:
477		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
478						    TAS2770_TDM_CFG_REG2_RXS_MASK,
479						    TAS2770_TDM_CFG_REG2_RXS_32BITS);
480		break;
481	case 0:
482		/* Do not change slot width */
483		ret = 0;
484		break;
485	default:
486		ret = -EINVAL;
487	}
488
489	if (ret < 0)
490		return ret;
491
492	return 0;
493}
494
495static const struct snd_soc_dai_ops tas2770_dai_ops = {
496	.mute_stream = tas2770_mute,
497	.hw_params  = tas2770_hw_params,
498	.set_fmt    = tas2770_set_fmt,
499	.set_tdm_slot = tas2770_set_dai_tdm_slot,
500	.no_capture_mute = 1,
501};
502
503#define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
504		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
505
506#define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
507					   SNDRV_PCM_RATE_96000 |\
508					    SNDRV_PCM_RATE_192000\
509					  )
510
511static struct snd_soc_dai_driver tas2770_dai_driver[] = {
512	{
513		.name = "tas2770 ASI1",
514		.id = 0,
515		.playback = {
516			.stream_name    = "ASI1 Playback",
517			.channels_min   = 1,
518			.channels_max   = 2,
519			.rates      = TAS2770_RATES,
520			.formats    = TAS2770_FORMATS,
521		},
522		.capture = {
523			.stream_name    = "ASI1 Capture",
524			.channels_min   = 0,
525			.channels_max   = 2,
526			.rates          = TAS2770_RATES,
527			.formats    = TAS2770_FORMATS,
528		},
529		.ops = &tas2770_dai_ops,
530		.symmetric_rate = 1,
531	},
532};
533
534static int tas2770_read_die_temp(struct tas2770_priv *tas2770, long *result)
535{
536	int ret = 0;
537	int reading, msb, lsb;
538
539	ret = regmap_read(tas2770->regmap, TAS2770_TEMP_MSB, &msb);
540	if (ret)
541		return ret;
542
543	ret = regmap_read(tas2770->regmap, TAS2770_TEMP_LSB, &lsb);
544	if (ret)
545		return ret;
546
547	reading = (msb << 4) | (lsb >> 4);
548
549	/*
550	 * As per datasheet: divide register by 16 and subtract 93 to get
551	 * degrees Celsius. hwmon requires millidegrees. Let's avoid rounding
552	 * errors by subtracting 93 * 16 then multiplying by 1000 / 16.
553	 *
554	 * NOTE: The ADC registers are initialised to 0 on reset. This means
555	 * that the temperature will read -93 *C until the chip is brought out
556	 * of software shutdown (e.g. the PCM it's attached to is opened). The
557	 * ADC is also shut down in software shutdown/low-power mode, so the
558	 * value read back from its registers will be the last value sampled
559	 * before entering software shutdown.
560	 */
561	*result = (reading - (93 * 16)) * (1000 / 16);
562	return 0;
563}
564
565static umode_t tas2770_hwmon_is_visible(const void *data,
566					enum hwmon_sensor_types type, u32 attr,
567					int channel)
568{
569	if (type != hwmon_temp)
570		return 0;
571
572	switch (attr) {
573	case hwmon_temp_input:
574		return 0444;
575	default:
576		break;
577	}
578
579	return 0;
580}
581
582static int tas2770_hwmon_read(struct device *dev,
583			      enum hwmon_sensor_types type,
584			      u32 attr, int channel, long *val)
585{
586	struct tas2770_priv *tas2770 = dev_get_drvdata(dev);
587	int ret;
588
589	switch (attr) {
590	case hwmon_temp_input:
591		ret = tas2770_read_die_temp(tas2770, val);
592		break;
593	default:
594		ret = -EOPNOTSUPP;
595		break;
596	}
597
598	return ret;
599}
600
601static const struct hwmon_channel_info *const tas2770_hwmon_info[] = {
602	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
603	NULL
604};
605
606static const struct hwmon_ops tas2770_hwmon_ops = {
607	.is_visible	= tas2770_hwmon_is_visible,
608	.read		= tas2770_hwmon_read,
609};
610
611static const struct hwmon_chip_info tas2770_hwmon_chip_info = {
612	.ops	= &tas2770_hwmon_ops,
613	.info	= tas2770_hwmon_info,
614};
615
616static const struct regmap_config tas2770_i2c_regmap;
617
618static int tas2770_codec_probe(struct snd_soc_component *component)
619{
620	struct tas2770_priv *tas2770 =
621			snd_soc_component_get_drvdata(component);
622	int ret;
623
624	tas2770->component = component;
625
626	if (tas2770->sdz_gpio) {
627		gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
628		usleep_range(1000, 2000);
629	}
630
631	tas2770_reset(tas2770);
632	regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap);
633
634	if (tas2770->i_sense_slot != -1 && tas2770->v_sense_slot != -1) {
635		ret = tas2770_set_ivsense_transmit(tas2770, tas2770->i_sense_slot,
636						   tas2770->v_sense_slot);
637
638		if (ret < 0)
639			return ret;
640	}
641
642	if (tas2770->pdm_slot != -1) {
643		ret = tas2770_set_pdm_transmit(tas2770, tas2770->pdm_slot);
644
645		if (ret < 0)
646			return ret;
647	}
648
649	return 0;
650}
651
652static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
653static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -10050, 50, 0);
654
655static const struct snd_kcontrol_new tas2770_snd_controls[] = {
656	SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
657		       0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
658	SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
659		       tas2770_digital_tlv),
660};
661
662static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
663	.probe			= tas2770_codec_probe,
664	.suspend		= tas2770_codec_suspend,
665	.resume			= tas2770_codec_resume,
666	.controls		= tas2770_snd_controls,
667	.num_controls		= ARRAY_SIZE(tas2770_snd_controls),
668	.dapm_widgets		= tas2770_dapm_widgets,
669	.num_dapm_widgets	= ARRAY_SIZE(tas2770_dapm_widgets),
670	.dapm_routes		= tas2770_audio_map,
671	.num_dapm_routes	= ARRAY_SIZE(tas2770_audio_map),
672	.idle_bias_on		= 1,
673	.endianness		= 1,
674};
675
676static int tas2770_register_codec(struct tas2770_priv *tas2770)
677{
678	return devm_snd_soc_register_component(tas2770->dev,
679		&soc_component_driver_tas2770,
680		tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
681}
682
683static const struct reg_default tas2770_reg_defaults[] = {
684	{ TAS2770_PAGE, 0x00 },
685	{ TAS2770_SW_RST, 0x00 },
686	{ TAS2770_PWR_CTRL, 0x0e },
687	{ TAS2770_PLAY_CFG_REG0, 0x10 },
688	{ TAS2770_PLAY_CFG_REG1, 0x01 },
689	{ TAS2770_PLAY_CFG_REG2, 0x00 },
690	{ TAS2770_MSC_CFG_REG0, 0x07 },
691	{ TAS2770_TDM_CFG_REG1, 0x02 },
692	{ TAS2770_TDM_CFG_REG2, 0x0a },
693	{ TAS2770_TDM_CFG_REG3, 0x10 },
694	{ TAS2770_INT_MASK_REG0, 0xfc },
695	{ TAS2770_INT_MASK_REG1, 0xb1 },
696	{ TAS2770_INT_CFG, 0x05 },
697	{ TAS2770_MISC_IRQ, 0x81 },
698	{ TAS2770_CLK_CGF, 0x0c },
699
700};
701
702static bool tas2770_volatile(struct device *dev, unsigned int reg)
703{
704	switch (reg) {
705	case TAS2770_PAGE: /* regmap implementation requires this */
706	case TAS2770_SW_RST: /* always clears after write */
707	case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
708	case TAS2770_LVE_INT_REG0:
709	case TAS2770_LVE_INT_REG1:
710	case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
711	case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
712	case TAS2770_VBAT_MSB:
713	case TAS2770_VBAT_LSB:
714	case TAS2770_TEMP_MSB:
715	case TAS2770_TEMP_LSB:
716		return true;
717	}
718
719	return false;
720}
721
722static bool tas2770_writeable(struct device *dev, unsigned int reg)
723{
724	switch (reg) {
725	case TAS2770_LVE_INT_REG0:
726	case TAS2770_LVE_INT_REG1:
727	case TAS2770_LAT_INT_REG0:
728	case TAS2770_LAT_INT_REG1:
729	case TAS2770_VBAT_MSB:
730	case TAS2770_VBAT_LSB:
731	case TAS2770_TEMP_MSB:
732	case TAS2770_TEMP_LSB:
733	case TAS2770_TDM_CLK_DETC:
734	case TAS2770_REV_AND_GPID:
735		return false;
736	}
737
738	return true;
739}
740
741static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
742	{
743		.range_min = 0,
744		.range_max = 1 * 128,
745		.selector_reg = TAS2770_PAGE,
746		.selector_mask = 0xff,
747		.selector_shift = 0,
748		.window_start = 0,
749		.window_len = 128,
750	},
751};
752
753static const struct regmap_config tas2770_i2c_regmap = {
754	.reg_bits = 8,
755	.val_bits = 8,
756	.writeable_reg = tas2770_writeable,
757	.volatile_reg = tas2770_volatile,
758	.reg_defaults = tas2770_reg_defaults,
759	.num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
760	.cache_type = REGCACHE_RBTREE,
761	.ranges = tas2770_regmap_ranges,
762	.num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
763	.max_register = 1 * 128,
764};
765
766static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
767{
768	int rc = 0;
769
770	rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
771				      &tas2770->i_sense_slot);
772	if (rc) {
773		dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
774			 "ti,imon-slot-no");
775
776		tas2770->i_sense_slot = -1;
777	}
778
779	rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
780				      &tas2770->v_sense_slot);
781	if (rc) {
782		dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
783			 "ti,vmon-slot-no");
784
785		tas2770->v_sense_slot = -1;
786	}
787
788	rc = fwnode_property_read_u32(dev->fwnode, "ti,pdm-slot-no",
789				      &tas2770->pdm_slot);
790	if (rc)
791		tas2770->pdm_slot = -1;
792
793	tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
794	if (IS_ERR(tas2770->sdz_gpio)) {
795		if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
796			return -EPROBE_DEFER;
797
798		tas2770->sdz_gpio = NULL;
799	}
800
801	return 0;
802}
803
804static int tas2770_i2c_probe(struct i2c_client *client)
805{
806	struct tas2770_priv *tas2770;
807	int result;
808
809	tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
810			       GFP_KERNEL);
811	if (!tas2770)
812		return -ENOMEM;
813
814	tas2770->dev = &client->dev;
815	i2c_set_clientdata(client, tas2770);
816	dev_set_drvdata(&client->dev, tas2770);
817
818	tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
819	if (IS_ERR(tas2770->regmap)) {
820		result = PTR_ERR(tas2770->regmap);
821		dev_err(&client->dev, "Failed to allocate register map: %d\n",
822			result);
823		return result;
824	}
825
826	if (client->dev.of_node) {
827		result = tas2770_parse_dt(&client->dev, tas2770);
828		if (result) {
829			dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
830				__func__);
831			return result;
832		}
833	}
834
835	tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
836						      GPIOD_OUT_HIGH);
837	if (IS_ERR(tas2770->reset_gpio)) {
838		if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
839			tas2770->reset_gpio = NULL;
840			return -EPROBE_DEFER;
841		}
842	}
843
844	if (IS_REACHABLE(CONFIG_HWMON)) {
845		struct device *hwmon;
846
847		hwmon = devm_hwmon_device_register_with_info(&client->dev, "tas2770",
848							tas2770,
849							&tas2770_hwmon_chip_info,
850							NULL);
851		if (IS_ERR(hwmon)) {
852			return dev_err_probe(&client->dev, PTR_ERR(hwmon),
853					     "Failed to register temp sensor\n");
854		}
855	}
856
857	result = tas2770_register_codec(tas2770);
858	if (result)
859		dev_err(tas2770->dev, "Register codec failed.\n");
860
861	return result;
862}
863
864static const struct i2c_device_id tas2770_i2c_id[] = {
865	{ "tas2770"},
866	{ }
867};
868MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
869
870#if defined(CONFIG_OF)
871static const struct of_device_id tas2770_of_match[] = {
872	{ .compatible = "ti,tas2770" },
873	{},
874};
875MODULE_DEVICE_TABLE(of, tas2770_of_match);
876#endif
877
878static struct i2c_driver tas2770_i2c_driver = {
879	.driver = {
880		.name   = "tas2770",
881		.of_match_table = of_match_ptr(tas2770_of_match),
882	},
883	.probe      = tas2770_i2c_probe,
884	.id_table   = tas2770_i2c_id,
885};
886module_i2c_driver(tas2770_i2c_driver);
887
888MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>");
889MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
890MODULE_LICENSE("GPL v2");