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