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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/pm.h>
16#include <linux/i2c.h>
17#include <linux/gpio/consumer.h>
18#include <linux/regulator/consumer.h>
19#include <linux/firmware.h>
20#include <linux/regmap.h>
21#include <linux/of.h>
22#include <linux/slab.h>
23#include <sound/soc.h>
24#include <sound/pcm.h>
25#include <sound/pcm_params.h>
26#include <sound/initval.h>
27#include <sound/tlv.h>
28
29#include "tas2770.h"
30
31#define TAS2770_MDELAY 0xFFFFFFFE
32
33static void tas2770_reset(struct tas2770_priv *tas2770)
34{
35 if (tas2770->reset_gpio) {
36 gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
37 msleep(20);
38 gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
39 usleep_range(1000, 2000);
40 }
41
42 snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
43 TAS2770_RST);
44 usleep_range(1000, 2000);
45}
46
47static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770)
48{
49 struct snd_soc_component *component = tas2770->component;
50 unsigned int val;
51 int ret;
52
53 if (tas2770->dac_powered)
54 val = tas2770->unmuted ?
55 TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE;
56 else
57 val = TAS2770_PWR_CTRL_SHUTDOWN;
58
59 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
60 TAS2770_PWR_CTRL_MASK, val);
61 if (ret < 0)
62 return ret;
63
64 return 0;
65}
66
67#ifdef CONFIG_PM
68static int tas2770_codec_suspend(struct snd_soc_component *component)
69{
70 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
71 int ret = 0;
72
73 regcache_cache_only(tas2770->regmap, true);
74 regcache_mark_dirty(tas2770->regmap);
75
76 if (tas2770->sdz_gpio) {
77 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
78 } else {
79 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
80 TAS2770_PWR_CTRL_MASK,
81 TAS2770_PWR_CTRL_SHUTDOWN);
82 if (ret < 0) {
83 regcache_cache_only(tas2770->regmap, false);
84 regcache_sync(tas2770->regmap);
85 return ret;
86 }
87
88 ret = 0;
89 }
90
91 return ret;
92}
93
94static int tas2770_codec_resume(struct snd_soc_component *component)
95{
96 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
97 int ret;
98
99 if (tas2770->sdz_gpio) {
100 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
101 usleep_range(1000, 2000);
102 } else {
103 ret = tas2770_update_pwr_ctrl(tas2770);
104 if (ret < 0)
105 return ret;
106 }
107
108 regcache_cache_only(tas2770->regmap, false);
109
110 return regcache_sync(tas2770->regmap);
111}
112#else
113#define tas2770_codec_suspend NULL
114#define tas2770_codec_resume NULL
115#endif
116
117static const char * const tas2770_ASI1_src[] = {
118 "I2C offset", "Left", "Right", "LeftRightDiv2",
119};
120
121static SOC_ENUM_SINGLE_DECL(
122 tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
123 4, tas2770_ASI1_src);
124
125static const struct snd_kcontrol_new tas2770_asi1_mux =
126 SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
127
128static int tas2770_dac_event(struct snd_soc_dapm_widget *w,
129 struct snd_kcontrol *kcontrol, int event)
130{
131 struct snd_soc_component *component =
132 snd_soc_dapm_to_component(w->dapm);
133 struct tas2770_priv *tas2770 =
134 snd_soc_component_get_drvdata(component);
135 int ret;
136
137 switch (event) {
138 case SND_SOC_DAPM_POST_PMU:
139 tas2770->dac_powered = 1;
140 ret = tas2770_update_pwr_ctrl(tas2770);
141 break;
142 case SND_SOC_DAPM_PRE_PMD:
143 tas2770->dac_powered = 0;
144 ret = tas2770_update_pwr_ctrl(tas2770);
145 break;
146 default:
147 dev_err(tas2770->dev, "Not supported evevt\n");
148 return -EINVAL;
149 }
150
151 return ret;
152}
153
154static const struct snd_kcontrol_new isense_switch =
155 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
156static const struct snd_kcontrol_new vsense_switch =
157 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
158
159static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
160 SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
161 SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
162 SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
163 SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
164 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
165 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
166 SND_SOC_DAPM_OUTPUT("OUT"),
167 SND_SOC_DAPM_SIGGEN("VMON"),
168 SND_SOC_DAPM_SIGGEN("IMON")
169};
170
171static const struct snd_soc_dapm_route tas2770_audio_map[] = {
172 {"ASI1 Sel", "I2C offset", "ASI1"},
173 {"ASI1 Sel", "Left", "ASI1"},
174 {"ASI1 Sel", "Right", "ASI1"},
175 {"ASI1 Sel", "LeftRightDiv2", "ASI1"},
176 {"DAC", NULL, "ASI1 Sel"},
177 {"OUT", NULL, "DAC"},
178 {"ISENSE", "Switch", "IMON"},
179 {"VSENSE", "Switch", "VMON"},
180};
181
182static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
183{
184 struct snd_soc_component *component = dai->component;
185 struct tas2770_priv *tas2770 =
186 snd_soc_component_get_drvdata(component);
187
188 tas2770->unmuted = !mute;
189 return tas2770_update_pwr_ctrl(tas2770);
190}
191
192static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
193{
194 int ret;
195 struct snd_soc_component *component = tas2770->component;
196
197 switch (bitwidth) {
198 case SNDRV_PCM_FORMAT_S16_LE:
199 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
200 TAS2770_TDM_CFG_REG2_RXW_MASK,
201 TAS2770_TDM_CFG_REG2_RXW_16BITS);
202 tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
203 break;
204 case SNDRV_PCM_FORMAT_S24_LE:
205 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
206 TAS2770_TDM_CFG_REG2_RXW_MASK,
207 TAS2770_TDM_CFG_REG2_RXW_24BITS);
208 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
209 break;
210 case SNDRV_PCM_FORMAT_S32_LE:
211 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
212 TAS2770_TDM_CFG_REG2_RXW_MASK,
213 TAS2770_TDM_CFG_REG2_RXW_32BITS);
214 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
215 break;
216
217 default:
218 return -EINVAL;
219 }
220
221 if (ret < 0)
222 return ret;
223
224 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
225 TAS2770_TDM_CFG_REG5_VSNS_MASK |
226 TAS2770_TDM_CFG_REG5_50_MASK,
227 TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
228 tas2770->v_sense_slot);
229 if (ret < 0)
230 return ret;
231
232 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
233 TAS2770_TDM_CFG_REG6_ISNS_MASK |
234 TAS2770_TDM_CFG_REG6_50_MASK,
235 TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
236 tas2770->i_sense_slot);
237 if (ret < 0)
238 return ret;
239
240 return 0;
241}
242
243static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
244{
245 struct snd_soc_component *component = tas2770->component;
246 int ramp_rate_val;
247 int ret;
248
249 switch (samplerate) {
250 case 48000:
251 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
252 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
253 break;
254 case 44100:
255 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
256 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
257 break;
258 case 96000:
259 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
260 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
261 break;
262 case 88200:
263 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
264 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
265 break;
266 case 192000:
267 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
268 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
269 break;
270 case 176400:
271 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
272 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
273 break;
274 default:
275 return -EINVAL;
276 }
277
278 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
279 TAS2770_TDM_CFG_REG0_SMP_MASK |
280 TAS2770_TDM_CFG_REG0_31_MASK,
281 ramp_rate_val);
282 if (ret < 0)
283 return ret;
284
285 return 0;
286}
287
288static int tas2770_hw_params(struct snd_pcm_substream *substream,
289 struct snd_pcm_hw_params *params,
290 struct snd_soc_dai *dai)
291{
292 struct snd_soc_component *component = dai->component;
293 struct tas2770_priv *tas2770 =
294 snd_soc_component_get_drvdata(component);
295 int ret;
296
297 ret = tas2770_set_bitwidth(tas2770, params_format(params));
298 if (ret)
299 return ret;
300
301 return tas2770_set_samplerate(tas2770, params_rate(params));
302}
303
304static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
305{
306 struct snd_soc_component *component = dai->component;
307 struct tas2770_priv *tas2770 =
308 snd_soc_component_get_drvdata(component);
309 u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0;
310 int ret;
311
312 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
313 case SND_SOC_DAIFMT_CBC_CFC:
314 break;
315 default:
316 dev_err(tas2770->dev, "ASI invalid DAI clocking\n");
317 return -EINVAL;
318 }
319
320 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
321 case SND_SOC_DAIFMT_NB_IF:
322 invert_fpol = 1;
323 fallthrough;
324 case SND_SOC_DAIFMT_NB_NF:
325 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
326 break;
327 case SND_SOC_DAIFMT_IB_IF:
328 invert_fpol = 1;
329 fallthrough;
330 case SND_SOC_DAIFMT_IB_NF:
331 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
332 break;
333 default:
334 dev_err(tas2770->dev, "ASI format Inverse is not found\n");
335 return -EINVAL;
336 }
337
338 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
339 TAS2770_TDM_CFG_REG1_RX_MASK,
340 asi_cfg_1);
341 if (ret < 0)
342 return ret;
343
344 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
345 case SND_SOC_DAIFMT_I2S:
346 tdm_rx_start_slot = 1;
347 fpol_preinv = 0;
348 break;
349 case SND_SOC_DAIFMT_DSP_A:
350 tdm_rx_start_slot = 0;
351 fpol_preinv = 1;
352 break;
353 case SND_SOC_DAIFMT_DSP_B:
354 tdm_rx_start_slot = 1;
355 fpol_preinv = 1;
356 break;
357 case SND_SOC_DAIFMT_LEFT_J:
358 tdm_rx_start_slot = 0;
359 fpol_preinv = 1;
360 break;
361 default:
362 dev_err(tas2770->dev,
363 "DAI Format is not found, fmt=0x%x\n", fmt);
364 return -EINVAL;
365 }
366
367 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
368 TAS2770_TDM_CFG_REG1_MASK,
369 (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
370 if (ret < 0)
371 return ret;
372
373 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
374 TAS2770_TDM_CFG_REG0_FPOL_MASK,
375 (fpol_preinv ^ invert_fpol)
376 ? TAS2770_TDM_CFG_REG0_FPOL_RSING
377 : TAS2770_TDM_CFG_REG0_FPOL_FALING);
378 if (ret < 0)
379 return ret;
380
381 return 0;
382}
383
384static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
385 unsigned int tx_mask,
386 unsigned int rx_mask,
387 int slots, int slot_width)
388{
389 struct snd_soc_component *component = dai->component;
390 int left_slot, right_slot;
391 int ret;
392
393 if (tx_mask == 0 || rx_mask != 0)
394 return -EINVAL;
395
396 left_slot = __ffs(tx_mask);
397 tx_mask &= ~(1 << left_slot);
398 if (tx_mask == 0) {
399 right_slot = left_slot;
400 } else {
401 right_slot = __ffs(tx_mask);
402 tx_mask &= ~(1 << right_slot);
403 }
404
405 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
406 return -EINVAL;
407
408 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
409 TAS2770_TDM_CFG_REG3_30_MASK,
410 (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
411 if (ret < 0)
412 return ret;
413 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
414 TAS2770_TDM_CFG_REG3_RXS_MASK,
415 (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
416 if (ret < 0)
417 return ret;
418
419 switch (slot_width) {
420 case 16:
421 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
422 TAS2770_TDM_CFG_REG2_RXS_MASK,
423 TAS2770_TDM_CFG_REG2_RXS_16BITS);
424 break;
425 case 24:
426 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
427 TAS2770_TDM_CFG_REG2_RXS_MASK,
428 TAS2770_TDM_CFG_REG2_RXS_24BITS);
429 break;
430 case 32:
431 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
432 TAS2770_TDM_CFG_REG2_RXS_MASK,
433 TAS2770_TDM_CFG_REG2_RXS_32BITS);
434 break;
435 case 0:
436 /* Do not change slot width */
437 ret = 0;
438 break;
439 default:
440 ret = -EINVAL;
441 }
442
443 if (ret < 0)
444 return ret;
445
446 return 0;
447}
448
449static const struct snd_soc_dai_ops tas2770_dai_ops = {
450 .mute_stream = tas2770_mute,
451 .hw_params = tas2770_hw_params,
452 .set_fmt = tas2770_set_fmt,
453 .set_tdm_slot = tas2770_set_dai_tdm_slot,
454 .no_capture_mute = 1,
455};
456
457#define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
458 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
459
460#define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
461 SNDRV_PCM_RATE_96000 |\
462 SNDRV_PCM_RATE_192000\
463 )
464
465static struct snd_soc_dai_driver tas2770_dai_driver[] = {
466 {
467 .name = "tas2770 ASI1",
468 .id = 0,
469 .playback = {
470 .stream_name = "ASI1 Playback",
471 .channels_min = 1,
472 .channels_max = 2,
473 .rates = TAS2770_RATES,
474 .formats = TAS2770_FORMATS,
475 },
476 .capture = {
477 .stream_name = "ASI1 Capture",
478 .channels_min = 0,
479 .channels_max = 2,
480 .rates = TAS2770_RATES,
481 .formats = TAS2770_FORMATS,
482 },
483 .ops = &tas2770_dai_ops,
484 .symmetric_rate = 1,
485 },
486};
487
488static const struct regmap_config tas2770_i2c_regmap;
489
490static int tas2770_codec_probe(struct snd_soc_component *component)
491{
492 struct tas2770_priv *tas2770 =
493 snd_soc_component_get_drvdata(component);
494
495 tas2770->component = component;
496
497 if (tas2770->sdz_gpio) {
498 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
499 usleep_range(1000, 2000);
500 }
501
502 tas2770_reset(tas2770);
503 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap);
504
505 return 0;
506}
507
508static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
509static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);
510
511static const struct snd_kcontrol_new tas2770_snd_controls[] = {
512 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
513 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
514 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
515 tas2770_digital_tlv),
516};
517
518static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
519 .probe = tas2770_codec_probe,
520 .suspend = tas2770_codec_suspend,
521 .resume = tas2770_codec_resume,
522 .controls = tas2770_snd_controls,
523 .num_controls = ARRAY_SIZE(tas2770_snd_controls),
524 .dapm_widgets = tas2770_dapm_widgets,
525 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets),
526 .dapm_routes = tas2770_audio_map,
527 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map),
528 .idle_bias_on = 1,
529 .endianness = 1,
530};
531
532static int tas2770_register_codec(struct tas2770_priv *tas2770)
533{
534 return devm_snd_soc_register_component(tas2770->dev,
535 &soc_component_driver_tas2770,
536 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
537}
538
539static const struct reg_default tas2770_reg_defaults[] = {
540 { TAS2770_PAGE, 0x00 },
541 { TAS2770_SW_RST, 0x00 },
542 { TAS2770_PWR_CTRL, 0x0e },
543 { TAS2770_PLAY_CFG_REG0, 0x10 },
544 { TAS2770_PLAY_CFG_REG1, 0x01 },
545 { TAS2770_PLAY_CFG_REG2, 0x00 },
546 { TAS2770_MSC_CFG_REG0, 0x07 },
547 { TAS2770_TDM_CFG_REG1, 0x02 },
548 { TAS2770_TDM_CFG_REG2, 0x0a },
549 { TAS2770_TDM_CFG_REG3, 0x10 },
550 { TAS2770_INT_MASK_REG0, 0xfc },
551 { TAS2770_INT_MASK_REG1, 0xb1 },
552 { TAS2770_INT_CFG, 0x05 },
553 { TAS2770_MISC_IRQ, 0x81 },
554 { TAS2770_CLK_CGF, 0x0c },
555
556};
557
558static bool tas2770_volatile(struct device *dev, unsigned int reg)
559{
560 switch (reg) {
561 case TAS2770_PAGE: /* regmap implementation requires this */
562 case TAS2770_SW_RST: /* always clears after write */
563 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
564 case TAS2770_LVE_INT_REG0:
565 case TAS2770_LVE_INT_REG1:
566 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
567 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
568 case TAS2770_VBAT_MSB:
569 case TAS2770_VBAT_LSB:
570 case TAS2770_TEMP_MSB:
571 case TAS2770_TEMP_LSB:
572 return true;
573 }
574
575 return false;
576}
577
578static bool tas2770_writeable(struct device *dev, unsigned int reg)
579{
580 switch (reg) {
581 case TAS2770_LVE_INT_REG0:
582 case TAS2770_LVE_INT_REG1:
583 case TAS2770_LAT_INT_REG0:
584 case TAS2770_LAT_INT_REG1:
585 case TAS2770_VBAT_MSB:
586 case TAS2770_VBAT_LSB:
587 case TAS2770_TEMP_MSB:
588 case TAS2770_TEMP_LSB:
589 case TAS2770_TDM_CLK_DETC:
590 case TAS2770_REV_AND_GPID:
591 return false;
592 }
593
594 return true;
595}
596
597static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
598 {
599 .range_min = 0,
600 .range_max = 1 * 128,
601 .selector_reg = TAS2770_PAGE,
602 .selector_mask = 0xff,
603 .selector_shift = 0,
604 .window_start = 0,
605 .window_len = 128,
606 },
607};
608
609static const struct regmap_config tas2770_i2c_regmap = {
610 .reg_bits = 8,
611 .val_bits = 8,
612 .writeable_reg = tas2770_writeable,
613 .volatile_reg = tas2770_volatile,
614 .reg_defaults = tas2770_reg_defaults,
615 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
616 .cache_type = REGCACHE_RBTREE,
617 .ranges = tas2770_regmap_ranges,
618 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
619 .max_register = 1 * 128,
620};
621
622static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
623{
624 int rc = 0;
625
626 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
627 &tas2770->i_sense_slot);
628 if (rc) {
629 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
630 "ti,imon-slot-no");
631
632 tas2770->i_sense_slot = 0;
633 }
634
635 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
636 &tas2770->v_sense_slot);
637 if (rc) {
638 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
639 "ti,vmon-slot-no");
640
641 tas2770->v_sense_slot = 2;
642 }
643
644 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
645 if (IS_ERR(tas2770->sdz_gpio)) {
646 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
647 return -EPROBE_DEFER;
648
649 tas2770->sdz_gpio = NULL;
650 }
651
652 return 0;
653}
654
655static int tas2770_i2c_probe(struct i2c_client *client)
656{
657 struct tas2770_priv *tas2770;
658 int result;
659
660 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
661 GFP_KERNEL);
662 if (!tas2770)
663 return -ENOMEM;
664
665 tas2770->dev = &client->dev;
666 i2c_set_clientdata(client, tas2770);
667 dev_set_drvdata(&client->dev, tas2770);
668
669 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
670 if (IS_ERR(tas2770->regmap)) {
671 result = PTR_ERR(tas2770->regmap);
672 dev_err(&client->dev, "Failed to allocate register map: %d\n",
673 result);
674 return result;
675 }
676
677 if (client->dev.of_node) {
678 result = tas2770_parse_dt(&client->dev, tas2770);
679 if (result) {
680 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
681 __func__);
682 return result;
683 }
684 }
685
686 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
687 GPIOD_OUT_HIGH);
688 if (IS_ERR(tas2770->reset_gpio)) {
689 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
690 tas2770->reset_gpio = NULL;
691 return -EPROBE_DEFER;
692 }
693 }
694
695 result = tas2770_register_codec(tas2770);
696 if (result)
697 dev_err(tas2770->dev, "Register codec failed.\n");
698
699 return result;
700}
701
702static const struct i2c_device_id tas2770_i2c_id[] = {
703 { "tas2770"},
704 { }
705};
706MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
707
708#if defined(CONFIG_OF)
709static const struct of_device_id tas2770_of_match[] = {
710 { .compatible = "ti,tas2770" },
711 {},
712};
713MODULE_DEVICE_TABLE(of, tas2770_of_match);
714#endif
715
716static struct i2c_driver tas2770_i2c_driver = {
717 .driver = {
718 .name = "tas2770",
719 .of_match_table = of_match_ptr(tas2770_of_match),
720 },
721 .probe = tas2770_i2c_probe,
722 .id_table = tas2770_i2c_id,
723};
724module_i2c_driver(tas2770_i2c_driver);
725
726MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>");
727MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
728MODULE_LICENSE("GPL v2");