1// SPDX-License-Identifier: GPL-2.0
2//
3// Driver for the Texas Instruments TAS2764 CODEC
4// Copyright (C) 2020 Texas Instruments Inc.
5
6#include <linux/module.h>
7#include <linux/moduleparam.h>
8#include <linux/err.h>
9#include <linux/init.h>
10#include <linux/delay.h>
11#include <linux/pm.h>
12#include <linux/i2c.h>
13#include <linux/gpio.h>
14#include <linux/gpio/consumer.h>
15#include <linux/regulator/consumer.h>
16#include <linux/regmap.h>
17#include <linux/of.h>
18#include <linux/of_gpio.h>
19#include <linux/slab.h>
20#include <sound/soc.h>
21#include <sound/pcm.h>
22#include <sound/pcm_params.h>
23#include <sound/initval.h>
24#include <sound/tlv.h>
25
26#include "tas2764.h"
27
28struct tas2764_priv {
29 struct snd_soc_component *component;
30 struct gpio_desc *reset_gpio;
31 struct gpio_desc *sdz_gpio;
32 struct regmap *regmap;
33 struct device *dev;
34 int irq;
35
36 int v_sense_slot;
37 int i_sense_slot;
38
39 bool dac_powered;
40 bool unmuted;
41};
42
43static const char *tas2764_int_ltch0_msgs[8] = {
44 "fault: over temperature", /* INT_LTCH0 & BIT(0) */
45 "fault: over current",
46 "fault: bad TDM clock",
47 "limiter active",
48 "fault: PVDD below limiter inflection point",
49 "fault: limiter max attenuation",
50 "fault: BOP infinite hold",
51 "fault: BOP mute", /* INT_LTCH0 & BIT(7) */
52};
53
54static const unsigned int tas2764_int_readout_regs[6] = {
55 TAS2764_INT_LTCH0,
56 TAS2764_INT_LTCH1,
57 TAS2764_INT_LTCH1_0,
58 TAS2764_INT_LTCH2,
59 TAS2764_INT_LTCH3,
60 TAS2764_INT_LTCH4,
61};
62
63static irqreturn_t tas2764_irq(int irq, void *data)
64{
65 struct tas2764_priv *tas2764 = data;
66 u8 latched[6] = {0, 0, 0, 0, 0, 0};
67 int ret = IRQ_NONE;
68 int i;
69
70 for (i = 0; i < ARRAY_SIZE(latched); i++)
71 latched[i] = snd_soc_component_read(component: tas2764->component,
72 reg: tas2764_int_readout_regs[i]);
73
74 for (i = 0; i < 8; i++) {
75 if (latched[0] & BIT(i)) {
76 dev_crit_ratelimited(tas2764->dev, "%s\n",
77 tas2764_int_ltch0_msgs[i]);
78 ret = IRQ_HANDLED;
79 }
80 }
81
82 if (latched[0]) {
83 dev_err_ratelimited(tas2764->dev, "other context to the fault: %02x,%02x,%02x,%02x,%02x",
84 latched[1], latched[2], latched[3], latched[4], latched[5]);
85 snd_soc_component_update_bits(component: tas2764->component,
86 TAS2764_INT_CLK_CFG,
87 TAS2764_INT_CLK_CFG_IRQZ_CLR,
88 TAS2764_INT_CLK_CFG_IRQZ_CLR);
89 }
90
91 return ret;
92}
93
94static void tas2764_reset(struct tas2764_priv *tas2764)
95{
96 if (tas2764->reset_gpio) {
97 gpiod_set_value_cansleep(desc: tas2764->reset_gpio, value: 0);
98 msleep(msecs: 20);
99 gpiod_set_value_cansleep(desc: tas2764->reset_gpio, value: 1);
100 usleep_range(min: 1000, max: 2000);
101 }
102
103 snd_soc_component_write(component: tas2764->component, TAS2764_SW_RST,
104 TAS2764_RST);
105 usleep_range(min: 1000, max: 2000);
106}
107
108static int tas2764_update_pwr_ctrl(struct tas2764_priv *tas2764)
109{
110 struct snd_soc_component *component = tas2764->component;
111 unsigned int val;
112 int ret;
113
114 if (tas2764->dac_powered)
115 val = tas2764->unmuted ?
116 TAS2764_PWR_CTRL_ACTIVE : TAS2764_PWR_CTRL_MUTE;
117 else
118 val = TAS2764_PWR_CTRL_SHUTDOWN;
119
120 ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
121 TAS2764_PWR_CTRL_MASK, val);
122 if (ret < 0)
123 return ret;
124
125 return 0;
126}
127
128#ifdef CONFIG_PM
129static int tas2764_codec_suspend(struct snd_soc_component *component)
130{
131 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
132 int ret;
133
134 ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
135 TAS2764_PWR_CTRL_MASK,
136 TAS2764_PWR_CTRL_SHUTDOWN);
137
138 if (ret < 0)
139 return ret;
140
141 if (tas2764->sdz_gpio)
142 gpiod_set_value_cansleep(desc: tas2764->sdz_gpio, value: 0);
143
144 regcache_cache_only(map: tas2764->regmap, enable: true);
145 regcache_mark_dirty(map: tas2764->regmap);
146
147 return 0;
148}
149
150static int tas2764_codec_resume(struct snd_soc_component *component)
151{
152 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
153 int ret;
154
155 if (tas2764->sdz_gpio) {
156 gpiod_set_value_cansleep(desc: tas2764->sdz_gpio, value: 1);
157 usleep_range(min: 1000, max: 2000);
158 }
159
160 ret = tas2764_update_pwr_ctrl(tas2764);
161
162 if (ret < 0)
163 return ret;
164
165 regcache_cache_only(map: tas2764->regmap, enable: false);
166
167 return regcache_sync(map: tas2764->regmap);
168}
169#else
170#define tas2764_codec_suspend NULL
171#define tas2764_codec_resume NULL
172#endif
173
174static const char * const tas2764_ASI1_src[] = {
175 "I2C offset", "Left", "Right", "LeftRightDiv2",
176};
177
178static SOC_ENUM_SINGLE_DECL(
179 tas2764_ASI1_src_enum, TAS2764_TDM_CFG2, TAS2764_TDM_CFG2_SCFG_SHIFT,
180 tas2764_ASI1_src);
181
182static const struct snd_kcontrol_new tas2764_asi1_mux =
183 SOC_DAPM_ENUM("ASI1 Source", tas2764_ASI1_src_enum);
184
185static int tas2764_dac_event(struct snd_soc_dapm_widget *w,
186 struct snd_kcontrol *kcontrol, int event)
187{
188 struct snd_soc_component *component = snd_soc_dapm_to_component(dapm: w->dapm);
189 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
190 int ret;
191
192 switch (event) {
193 case SND_SOC_DAPM_POST_PMU:
194 tas2764->dac_powered = true;
195 ret = tas2764_update_pwr_ctrl(tas2764);
196 break;
197 case SND_SOC_DAPM_PRE_PMD:
198 tas2764->dac_powered = false;
199 ret = tas2764_update_pwr_ctrl(tas2764);
200 break;
201 default:
202 dev_err(tas2764->dev, "Unsupported event\n");
203 return -EINVAL;
204 }
205
206 if (ret < 0)
207 return ret;
208
209 return 0;
210}
211
212static const struct snd_kcontrol_new isense_switch =
213 SOC_DAPM_SINGLE("Switch", TAS2764_PWR_CTRL, TAS2764_ISENSE_POWER_EN, 1, 1);
214static const struct snd_kcontrol_new vsense_switch =
215 SOC_DAPM_SINGLE("Switch", TAS2764_PWR_CTRL, TAS2764_VSENSE_POWER_EN, 1, 1);
216
217static const struct snd_soc_dapm_widget tas2764_dapm_widgets[] = {
218 SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
219 SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2764_asi1_mux),
220 SND_SOC_DAPM_SWITCH("ISENSE", TAS2764_PWR_CTRL, TAS2764_ISENSE_POWER_EN,
221 1, &isense_switch),
222 SND_SOC_DAPM_SWITCH("VSENSE", TAS2764_PWR_CTRL, TAS2764_VSENSE_POWER_EN,
223 1, &vsense_switch),
224 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2764_dac_event,
225 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
226 SND_SOC_DAPM_OUTPUT("OUT"),
227 SND_SOC_DAPM_SIGGEN("VMON"),
228 SND_SOC_DAPM_SIGGEN("IMON")
229};
230
231static const struct snd_soc_dapm_route tas2764_audio_map[] = {
232 {"ASI1 Sel", "I2C offset", "ASI1"},
233 {"ASI1 Sel", "Left", "ASI1"},
234 {"ASI1 Sel", "Right", "ASI1"},
235 {"ASI1 Sel", "LeftRightDiv2", "ASI1"},
236 {"DAC", NULL, "ASI1 Sel"},
237 {"OUT", NULL, "DAC"},
238 {"ISENSE", "Switch", "IMON"},
239 {"VSENSE", "Switch", "VMON"},
240};
241
242static int tas2764_mute(struct snd_soc_dai *dai, int mute, int direction)
243{
244 struct tas2764_priv *tas2764 =
245 snd_soc_component_get_drvdata(c: dai->component);
246
247 tas2764->unmuted = !mute;
248 return tas2764_update_pwr_ctrl(tas2764);
249}
250
251static int tas2764_set_bitwidth(struct tas2764_priv *tas2764, int bitwidth)
252{
253 struct snd_soc_component *component = tas2764->component;
254 int sense_en;
255 int val;
256 int ret;
257
258 switch (bitwidth) {
259 case SNDRV_PCM_FORMAT_S16_LE:
260 ret = snd_soc_component_update_bits(component,
261 TAS2764_TDM_CFG2,
262 TAS2764_TDM_CFG2_RXW_MASK,
263 TAS2764_TDM_CFG2_RXW_16BITS);
264 break;
265 case SNDRV_PCM_FORMAT_S24_LE:
266 ret = snd_soc_component_update_bits(component,
267 TAS2764_TDM_CFG2,
268 TAS2764_TDM_CFG2_RXW_MASK,
269 TAS2764_TDM_CFG2_RXW_24BITS);
270 break;
271 case SNDRV_PCM_FORMAT_S32_LE:
272 ret = snd_soc_component_update_bits(component,
273 TAS2764_TDM_CFG2,
274 TAS2764_TDM_CFG2_RXW_MASK,
275 TAS2764_TDM_CFG2_RXW_32BITS);
276 break;
277
278 default:
279 return -EINVAL;
280 }
281
282 if (ret < 0)
283 return ret;
284
285 val = snd_soc_component_read(component: tas2764->component, TAS2764_PWR_CTRL);
286 if (val < 0)
287 return val;
288
289 if (val & (1 << TAS2764_VSENSE_POWER_EN))
290 sense_en = 0;
291 else
292 sense_en = TAS2764_TDM_CFG5_VSNS_ENABLE;
293
294 ret = snd_soc_component_update_bits(component: tas2764->component, TAS2764_TDM_CFG5,
295 TAS2764_TDM_CFG5_VSNS_ENABLE,
296 val: sense_en);
297 if (ret < 0)
298 return ret;
299
300 if (val & (1 << TAS2764_ISENSE_POWER_EN))
301 sense_en = 0;
302 else
303 sense_en = TAS2764_TDM_CFG6_ISNS_ENABLE;
304
305 ret = snd_soc_component_update_bits(component: tas2764->component, TAS2764_TDM_CFG6,
306 TAS2764_TDM_CFG6_ISNS_ENABLE,
307 val: sense_en);
308 if (ret < 0)
309 return ret;
310
311 return 0;
312}
313
314static int tas2764_set_samplerate(struct tas2764_priv *tas2764, int samplerate)
315{
316 struct snd_soc_component *component = tas2764->component;
317 int ramp_rate_val;
318 int ret;
319
320 switch (samplerate) {
321 case 48000:
322 ramp_rate_val = TAS2764_TDM_CFG0_SMP_48KHZ |
323 TAS2764_TDM_CFG0_44_1_48KHZ;
324 break;
325 case 44100:
326 ramp_rate_val = TAS2764_TDM_CFG0_SMP_44_1KHZ |
327 TAS2764_TDM_CFG0_44_1_48KHZ;
328 break;
329 case 96000:
330 ramp_rate_val = TAS2764_TDM_CFG0_SMP_48KHZ |
331 TAS2764_TDM_CFG0_88_2_96KHZ;
332 break;
333 case 88200:
334 ramp_rate_val = TAS2764_TDM_CFG0_SMP_44_1KHZ |
335 TAS2764_TDM_CFG0_88_2_96KHZ;
336 break;
337 default:
338 return -EINVAL;
339 }
340
341 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG0,
342 TAS2764_TDM_CFG0_SMP_MASK |
343 TAS2764_TDM_CFG0_MASK,
344 val: ramp_rate_val);
345 if (ret < 0)
346 return ret;
347
348 return 0;
349}
350
351static int tas2764_hw_params(struct snd_pcm_substream *substream,
352 struct snd_pcm_hw_params *params,
353 struct snd_soc_dai *dai)
354{
355 struct snd_soc_component *component = dai->component;
356 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
357 int ret;
358
359 ret = tas2764_set_bitwidth(tas2764, bitwidth: params_format(p: params));
360 if (ret < 0)
361 return ret;
362
363 return tas2764_set_samplerate(tas2764, samplerate: params_rate(p: params));
364}
365
366static int tas2764_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
367{
368 struct snd_soc_component *component = dai->component;
369 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
370 u8 tdm_rx_start_slot = 0, asi_cfg_0 = 0, asi_cfg_1 = 0;
371 int ret;
372
373 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
374 case SND_SOC_DAIFMT_NB_IF:
375 asi_cfg_0 ^= TAS2764_TDM_CFG0_FRAME_START;
376 fallthrough;
377 case SND_SOC_DAIFMT_NB_NF:
378 asi_cfg_1 = TAS2764_TDM_CFG1_RX_RISING;
379 break;
380 case SND_SOC_DAIFMT_IB_IF:
381 asi_cfg_0 ^= TAS2764_TDM_CFG0_FRAME_START;
382 fallthrough;
383 case SND_SOC_DAIFMT_IB_NF:
384 asi_cfg_1 = TAS2764_TDM_CFG1_RX_FALLING;
385 break;
386 }
387
388 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG1,
389 TAS2764_TDM_CFG1_RX_MASK,
390 val: asi_cfg_1);
391 if (ret < 0)
392 return ret;
393
394 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
395 case SND_SOC_DAIFMT_I2S:
396 asi_cfg_0 ^= TAS2764_TDM_CFG0_FRAME_START;
397 fallthrough;
398 case SND_SOC_DAIFMT_DSP_A:
399 tdm_rx_start_slot = 1;
400 break;
401 case SND_SOC_DAIFMT_DSP_B:
402 case SND_SOC_DAIFMT_LEFT_J:
403 tdm_rx_start_slot = 0;
404 break;
405 default:
406 dev_err(tas2764->dev,
407 "DAI Format is not found, fmt=0x%x\n", fmt);
408 return -EINVAL;
409 }
410
411 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG0,
412 TAS2764_TDM_CFG0_FRAME_START,
413 val: asi_cfg_0);
414 if (ret < 0)
415 return ret;
416
417 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG1,
418 TAS2764_TDM_CFG1_MASK,
419 val: (tdm_rx_start_slot << TAS2764_TDM_CFG1_51_SHIFT));
420 if (ret < 0)
421 return ret;
422
423 return 0;
424}
425
426static int tas2764_set_dai_tdm_slot(struct snd_soc_dai *dai,
427 unsigned int tx_mask,
428 unsigned int rx_mask,
429 int slots, int slot_width)
430{
431 struct snd_soc_component *component = dai->component;
432 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
433 int left_slot, right_slot;
434 int slots_cfg;
435 int slot_size;
436 int ret;
437
438 if (tx_mask == 0 || rx_mask != 0)
439 return -EINVAL;
440
441 left_slot = __ffs(tx_mask);
442 tx_mask &= ~(1 << left_slot);
443 if (tx_mask == 0) {
444 right_slot = left_slot;
445 } else {
446 right_slot = __ffs(tx_mask);
447 tx_mask &= ~(1 << right_slot);
448 }
449
450 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
451 return -EINVAL;
452
453 slots_cfg = (right_slot << TAS2764_TDM_CFG3_RXS_SHIFT) | left_slot;
454
455 ret = snd_soc_component_write(component, TAS2764_TDM_CFG3, val: slots_cfg);
456 if (ret)
457 return ret;
458
459 switch (slot_width) {
460 case 16:
461 slot_size = TAS2764_TDM_CFG2_RXS_16BITS;
462 break;
463 case 24:
464 slot_size = TAS2764_TDM_CFG2_RXS_24BITS;
465 break;
466 case 32:
467 slot_size = TAS2764_TDM_CFG2_RXS_32BITS;
468 break;
469 default:
470 return -EINVAL;
471 }
472
473 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG2,
474 TAS2764_TDM_CFG2_RXS_MASK,
475 val: slot_size);
476 if (ret < 0)
477 return ret;
478
479 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG5,
480 TAS2764_TDM_CFG5_50_MASK,
481 val: tas2764->v_sense_slot);
482 if (ret < 0)
483 return ret;
484
485 ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG6,
486 TAS2764_TDM_CFG6_50_MASK,
487 val: tas2764->i_sense_slot);
488 if (ret < 0)
489 return ret;
490
491 return 0;
492}
493
494static const struct snd_soc_dai_ops tas2764_dai_ops = {
495 .mute_stream = tas2764_mute,
496 .hw_params = tas2764_hw_params,
497 .set_fmt = tas2764_set_fmt,
498 .set_tdm_slot = tas2764_set_dai_tdm_slot,
499 .no_capture_mute = 1,
500};
501
502#define TAS2764_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
503 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
504
505#define TAS2764_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
506 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_88200)
507
508static struct snd_soc_dai_driver tas2764_dai_driver[] = {
509 {
510 .name = "tas2764 ASI1",
511 .id = 0,
512 .playback = {
513 .stream_name = "ASI1 Playback",
514 .channels_min = 1,
515 .channels_max = 2,
516 .rates = TAS2764_RATES,
517 .formats = TAS2764_FORMATS,
518 },
519 .capture = {
520 .stream_name = "ASI1 Capture",
521 .channels_min = 0,
522 .channels_max = 2,
523 .rates = TAS2764_RATES,
524 .formats = TAS2764_FORMATS,
525 },
526 .ops = &tas2764_dai_ops,
527 .symmetric_rate = 1,
528 },
529};
530
531static int tas2764_codec_probe(struct snd_soc_component *component)
532{
533 struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(c: component);
534 int ret;
535
536 tas2764->component = component;
537
538 if (tas2764->sdz_gpio) {
539 gpiod_set_value_cansleep(desc: tas2764->sdz_gpio, value: 1);
540 usleep_range(min: 1000, max: 2000);
541 }
542
543 tas2764_reset(tas2764);
544
545 if (tas2764->irq) {
546 ret = snd_soc_component_write(component: tas2764->component, TAS2764_INT_MASK0, val: 0xff);
547 if (ret < 0)
548 return ret;
549
550 ret = snd_soc_component_write(component: tas2764->component, TAS2764_INT_MASK1, val: 0xff);
551 if (ret < 0)
552 return ret;
553
554 ret = snd_soc_component_write(component: tas2764->component, TAS2764_INT_MASK2, val: 0xff);
555 if (ret < 0)
556 return ret;
557
558 ret = snd_soc_component_write(component: tas2764->component, TAS2764_INT_MASK3, val: 0xff);
559 if (ret < 0)
560 return ret;
561
562 ret = snd_soc_component_write(component: tas2764->component, TAS2764_INT_MASK4, val: 0xff);
563 if (ret < 0)
564 return ret;
565
566 ret = devm_request_threaded_irq(dev: tas2764->dev, irq: tas2764->irq, NULL, thread_fn: tas2764_irq,
567 IRQF_ONESHOT | IRQF_SHARED | IRQF_TRIGGER_LOW,
568 devname: "tas2764", dev_id: tas2764);
569 if (ret)
570 dev_warn(tas2764->dev, "failed to request IRQ: %d\n", ret);
571 }
572
573 ret = snd_soc_component_update_bits(component: tas2764->component, TAS2764_TDM_CFG5,
574 TAS2764_TDM_CFG5_VSNS_ENABLE, val: 0);
575 if (ret < 0)
576 return ret;
577
578 ret = snd_soc_component_update_bits(component: tas2764->component, TAS2764_TDM_CFG6,
579 TAS2764_TDM_CFG6_ISNS_ENABLE, val: 0);
580 if (ret < 0)
581 return ret;
582
583 return 0;
584}
585
586static DECLARE_TLV_DB_SCALE(tas2764_digital_tlv, 1100, 50, 0);
587static DECLARE_TLV_DB_SCALE(tas2764_playback_volume, -10050, 50, 1);
588
589static const char * const tas2764_hpf_texts[] = {
590 "Disabled", "2 Hz", "50 Hz", "100 Hz", "200 Hz",
591 "400 Hz", "800 Hz"
592};
593
594static SOC_ENUM_SINGLE_DECL(
595 tas2764_hpf_enum, TAS2764_DC_BLK0,
596 TAS2764_DC_BLK0_HPF_FREQ_PB_SHIFT, tas2764_hpf_texts);
597
598static const struct snd_kcontrol_new tas2764_snd_controls[] = {
599 SOC_SINGLE_TLV("Speaker Volume", TAS2764_DVC, 0,
600 TAS2764_DVC_MAX, 1, tas2764_playback_volume),
601 SOC_SINGLE_TLV("Amp Gain Volume", TAS2764_CHNL_0, 1, 0x14, 0,
602 tas2764_digital_tlv),
603 SOC_ENUM("HPF Corner Frequency", tas2764_hpf_enum),
604};
605
606static const struct snd_soc_component_driver soc_component_driver_tas2764 = {
607 .probe = tas2764_codec_probe,
608 .suspend = tas2764_codec_suspend,
609 .resume = tas2764_codec_resume,
610 .controls = tas2764_snd_controls,
611 .num_controls = ARRAY_SIZE(tas2764_snd_controls),
612 .dapm_widgets = tas2764_dapm_widgets,
613 .num_dapm_widgets = ARRAY_SIZE(tas2764_dapm_widgets),
614 .dapm_routes = tas2764_audio_map,
615 .num_dapm_routes = ARRAY_SIZE(tas2764_audio_map),
616 .idle_bias_on = 1,
617 .endianness = 1,
618};
619
620static const struct reg_default tas2764_reg_defaults[] = {
621 { TAS2764_PAGE, 0x00 },
622 { TAS2764_SW_RST, 0x00 },
623 { TAS2764_PWR_CTRL, 0x1a },
624 { TAS2764_DVC, 0x00 },
625 { TAS2764_CHNL_0, 0x28 },
626 { TAS2764_TDM_CFG0, 0x09 },
627 { TAS2764_TDM_CFG1, 0x02 },
628 { TAS2764_TDM_CFG2, 0x0a },
629 { TAS2764_TDM_CFG3, 0x10 },
630 { TAS2764_TDM_CFG5, 0x42 },
631};
632
633static const struct regmap_range_cfg tas2764_regmap_ranges[] = {
634 {
635 .range_min = 0,
636 .range_max = 1 * 128,
637 .selector_reg = TAS2764_PAGE,
638 .selector_mask = 0xff,
639 .selector_shift = 0,
640 .window_start = 0,
641 .window_len = 128,
642 },
643};
644
645static bool tas2764_volatile_register(struct device *dev, unsigned int reg)
646{
647 switch (reg) {
648 case TAS2764_INT_LTCH0 ... TAS2764_INT_LTCH4:
649 case TAS2764_INT_CLK_CFG:
650 return true;
651 default:
652 return false;
653 }
654}
655
656static const struct regmap_config tas2764_i2c_regmap = {
657 .reg_bits = 8,
658 .val_bits = 8,
659 .volatile_reg = tas2764_volatile_register,
660 .reg_defaults = tas2764_reg_defaults,
661 .num_reg_defaults = ARRAY_SIZE(tas2764_reg_defaults),
662 .cache_type = REGCACHE_RBTREE,
663 .ranges = tas2764_regmap_ranges,
664 .num_ranges = ARRAY_SIZE(tas2764_regmap_ranges),
665 .max_register = 1 * 128,
666};
667
668static int tas2764_parse_dt(struct device *dev, struct tas2764_priv *tas2764)
669{
670 int ret = 0;
671
672 tas2764->reset_gpio = devm_gpiod_get_optional(dev: tas2764->dev, con_id: "reset",
673 flags: GPIOD_OUT_HIGH);
674 if (IS_ERR(ptr: tas2764->reset_gpio)) {
675 if (PTR_ERR(ptr: tas2764->reset_gpio) == -EPROBE_DEFER) {
676 tas2764->reset_gpio = NULL;
677 return -EPROBE_DEFER;
678 }
679 }
680
681 tas2764->sdz_gpio = devm_gpiod_get_optional(dev, con_id: "shutdown", flags: GPIOD_OUT_HIGH);
682 if (IS_ERR(ptr: tas2764->sdz_gpio)) {
683 if (PTR_ERR(ptr: tas2764->sdz_gpio) == -EPROBE_DEFER)
684 return -EPROBE_DEFER;
685
686 tas2764->sdz_gpio = NULL;
687 }
688
689 ret = fwnode_property_read_u32(fwnode: dev->fwnode, propname: "ti,imon-slot-no",
690 val: &tas2764->i_sense_slot);
691 if (ret)
692 tas2764->i_sense_slot = 0;
693
694 ret = fwnode_property_read_u32(fwnode: dev->fwnode, propname: "ti,vmon-slot-no",
695 val: &tas2764->v_sense_slot);
696 if (ret)
697 tas2764->v_sense_slot = 2;
698
699 return 0;
700}
701
702static int tas2764_i2c_probe(struct i2c_client *client)
703{
704 struct tas2764_priv *tas2764;
705 int result;
706
707 tas2764 = devm_kzalloc(dev: &client->dev, size: sizeof(struct tas2764_priv),
708 GFP_KERNEL);
709 if (!tas2764)
710 return -ENOMEM;
711
712 tas2764->dev = &client->dev;
713 tas2764->irq = client->irq;
714 i2c_set_clientdata(client, data: tas2764);
715 dev_set_drvdata(dev: &client->dev, data: tas2764);
716
717 tas2764->regmap = devm_regmap_init_i2c(client, &tas2764_i2c_regmap);
718 if (IS_ERR(ptr: tas2764->regmap)) {
719 result = PTR_ERR(ptr: tas2764->regmap);
720 dev_err(&client->dev, "Failed to allocate register map: %d\n",
721 result);
722 return result;
723 }
724
725 if (client->dev.of_node) {
726 result = tas2764_parse_dt(dev: &client->dev, tas2764);
727 if (result) {
728 dev_err(tas2764->dev, "%s: Failed to parse devicetree\n",
729 __func__);
730 return result;
731 }
732 }
733
734 return devm_snd_soc_register_component(dev: tas2764->dev,
735 component_driver: &soc_component_driver_tas2764,
736 dai_drv: tas2764_dai_driver,
737 ARRAY_SIZE(tas2764_dai_driver));
738}
739
740static const struct i2c_device_id tas2764_i2c_id[] = {
741 { "tas2764", 0},
742 { }
743};
744MODULE_DEVICE_TABLE(i2c, tas2764_i2c_id);
745
746#if defined(CONFIG_OF)
747static const struct of_device_id tas2764_of_match[] = {
748 { .compatible = "ti,tas2764" },
749 {},
750};
751MODULE_DEVICE_TABLE(of, tas2764_of_match);
752#endif
753
754static struct i2c_driver tas2764_i2c_driver = {
755 .driver = {
756 .name = "tas2764",
757 .of_match_table = of_match_ptr(tas2764_of_match),
758 },
759 .probe = tas2764_i2c_probe,
760 .id_table = tas2764_i2c_id,
761};
762module_i2c_driver(tas2764_i2c_driver);
763
764MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
765MODULE_DESCRIPTION("TAS2764 I2C Smart Amplifier driver");
766MODULE_LICENSE("GPL v2");
767

source code of linux/sound/soc/codecs/tas2764.c