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
tas2770_reset(struct tas2770_priv * tas2770)34 static 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
tas2770_update_pwr_ctrl(struct tas2770_priv * tas2770)48 static 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
tas2770_codec_suspend(struct snd_soc_component * component)69 static 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
tas2770_codec_resume(struct snd_soc_component * component)95 static 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
118 static const char * const tas2770_ASI1_src[] = {
119 "I2C offset", "Left", "Right", "LeftRightDiv2",
120 };
121
122 static SOC_ENUM_SINGLE_DECL(
123 tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
124 4, tas2770_ASI1_src);
125
126 static const struct snd_kcontrol_new tas2770_asi1_mux =
127 SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
128
tas2770_dac_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)129 static 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
155 static const struct snd_kcontrol_new isense_switch =
156 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
157 static const struct snd_kcontrol_new vsense_switch =
158 SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
159
sense_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)160 static 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
184 static 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
198 static 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
tas2770_mute(struct snd_soc_dai * dai,int mute,int direction)209 static 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
tas2770_set_ivsense_transmit(struct tas2770_priv * tas2770,int i_slot,int v_slot)219 static 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
tas2770_set_pdm_transmit(struct tas2770_priv * tas2770,int slot)244 static 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
tas2770_set_bitwidth(struct tas2770_priv * tas2770,int bitwidth)257 static 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
tas2770_set_samplerate(struct tas2770_priv * tas2770,int samplerate)289 static 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
tas2770_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)334 static 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
tas2770_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)350 static 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
tas2770_set_dai_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int slot_width)430 static 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
tas2770_set_dai_tdm_idle(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int tx_mode,int rx_mode)495 static int tas2770_set_dai_tdm_idle(struct snd_soc_dai *dai,
496 unsigned int tx_mask,
497 unsigned int rx_mask,
498 int tx_mode, int rx_mode)
499 {
500 struct snd_soc_component *component = dai->component;
501 struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
502 int ret;
503
504 /* We don't support setting anything for SDIN */
505 if (rx_mode)
506 return -EOPNOTSUPP;
507
508 if (tas2770->idle_tx_mode == tx_mode)
509 return 0;
510
511 switch (tx_mode) {
512 case SND_SOC_DAI_TDM_IDLE_PULLDOWN:
513 ret = snd_soc_component_update_bits(component, TAS2770_DIN_PD,
514 TAS2770_DIN_PD_SDOUT,
515 TAS2770_DIN_PD_SDOUT);
516 if (ret)
517 return ret;
518
519 break;
520 case SND_SOC_DAI_TDM_IDLE_ZERO:
521 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG4,
522 TAS2770_TDM_CFG_REG4_TX_KEEPER,
523 TAS2770_TDM_CFG_REG4_TX_KEEPER);
524 if (ret)
525 return ret;
526
527 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG4,
528 TAS2770_TDM_CFG_REG4_TX_FILL, 0);
529 if (ret)
530 return ret;
531
532 break;
533 case SND_SOC_DAI_TDM_IDLE_HIZ:
534 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG4,
535 TAS2770_TDM_CFG_REG4_TX_KEEPER,
536 TAS2770_TDM_CFG_REG4_TX_KEEPER);
537 if (ret)
538 return ret;
539
540 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG4,
541 TAS2770_TDM_CFG_REG4_TX_FILL,
542 TAS2770_TDM_CFG_REG4_TX_FILL);
543 if (ret)
544 return ret;
545
546 break;
547 case SND_SOC_DAI_TDM_IDLE_OFF:
548 ret = snd_soc_component_update_bits(component, TAS2770_DIN_PD,
549 TAS2770_DIN_PD_SDOUT, 0);
550 if (ret)
551 return ret;
552
553 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG4,
554 TAS2770_TDM_CFG_REG4_TX_KEEPER, 0);
555 if (ret)
556 return ret;
557
558 break;
559
560 default:
561 return -EOPNOTSUPP;
562 }
563
564 tas2770->idle_tx_mode = tx_mode;
565
566 return 0;
567 }
568
569 static const struct snd_soc_dai_ops tas2770_dai_ops = {
570 .mute_stream = tas2770_mute,
571 .hw_params = tas2770_hw_params,
572 .set_fmt = tas2770_set_fmt,
573 .set_tdm_slot = tas2770_set_dai_tdm_slot,
574 .set_tdm_idle = tas2770_set_dai_tdm_idle,
575 .no_capture_mute = 1,
576 };
577
578 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
579 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
580
581 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
582 SNDRV_PCM_RATE_96000 |\
583 SNDRV_PCM_RATE_192000\
584 )
585
586 static struct snd_soc_dai_driver tas2770_dai_driver[] = {
587 {
588 .name = "tas2770 ASI1",
589 .id = 0,
590 .playback = {
591 .stream_name = "ASI1 Playback",
592 .channels_min = 1,
593 .channels_max = 2,
594 .rates = TAS2770_RATES,
595 .formats = TAS2770_FORMATS,
596 },
597 .capture = {
598 .stream_name = "ASI1 Capture",
599 .channels_min = 0,
600 .channels_max = 2,
601 .rates = TAS2770_RATES,
602 .formats = TAS2770_FORMATS,
603 },
604 .ops = &tas2770_dai_ops,
605 .symmetric_rate = 1,
606 },
607 };
608
tas2770_read_die_temp(struct tas2770_priv * tas2770,long * result)609 static int tas2770_read_die_temp(struct tas2770_priv *tas2770, long *result)
610 {
611 int ret = 0;
612 int reading, msb, lsb;
613
614 ret = regmap_read(tas2770->regmap, TAS2770_TEMP_MSB, &msb);
615 if (ret)
616 return ret;
617
618 ret = regmap_read(tas2770->regmap, TAS2770_TEMP_LSB, &lsb);
619 if (ret)
620 return ret;
621
622 reading = (msb << 4) | (lsb >> 4);
623
624 /*
625 * As per datasheet: divide register by 16 and subtract 93 to get
626 * degrees Celsius. hwmon requires millidegrees. Let's avoid rounding
627 * errors by subtracting 93 * 16 and scaling before dividing.
628 *
629 * NOTE: The ADC registers are initialised to 0 on reset. This means
630 * that the temperature will read -93 *C until the chip is brought out
631 * of software shutdown (e.g. the PCM it's attached to is opened). The
632 * ADC is also shut down in software shutdown/low-power mode, so the
633 * value read back from its registers will be the last value sampled
634 * before entering software shutdown.
635 */
636 if (reading == 0)
637 return -ENODATA;
638
639 *result = (reading - (93 * 16)) * 1000 / 16;
640 return 0;
641 }
642
tas2770_hwmon_is_fault(struct tas2770_priv * tas2770,long * result)643 static int tas2770_hwmon_is_fault(struct tas2770_priv *tas2770, long *result)
644 {
645 int ret;
646 long temp;
647
648 ret = tas2770_read_die_temp(tas2770, &temp);
649 if (ret == -ENODATA) {
650 *result = true;
651 return 0;
652 }
653
654 return ret;
655 }
656
tas2770_hwmon_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)657 static umode_t tas2770_hwmon_is_visible(const void *data,
658 enum hwmon_sensor_types type, u32 attr,
659 int channel)
660 {
661 if (type != hwmon_temp)
662 return 0;
663
664 switch (attr) {
665 case hwmon_temp_input:
666 case hwmon_temp_fault:
667 return 0444;
668 default:
669 break;
670 }
671
672 return 0;
673 }
674
tas2770_hwmon_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)675 static int tas2770_hwmon_read(struct device *dev,
676 enum hwmon_sensor_types type,
677 u32 attr, int channel, long *val)
678 {
679 struct tas2770_priv *tas2770 = dev_get_drvdata(dev);
680 int ret;
681
682 switch (attr) {
683 case hwmon_temp_input:
684 ret = tas2770_read_die_temp(tas2770, val);
685 break;
686 case hwmon_temp_fault:
687 ret = tas2770_hwmon_is_fault(tas2770, val);
688 break;
689 default:
690 ret = -EOPNOTSUPP;
691 break;
692 }
693
694 return ret;
695 }
696
697 static const struct hwmon_channel_info *const tas2770_hwmon_info[] = {
698 HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_FAULT),
699 NULL
700 };
701
702 static const struct hwmon_ops tas2770_hwmon_ops = {
703 .is_visible = tas2770_hwmon_is_visible,
704 .read = tas2770_hwmon_read,
705 };
706
707 static const struct hwmon_chip_info tas2770_hwmon_chip_info = {
708 .ops = &tas2770_hwmon_ops,
709 .info = tas2770_hwmon_info,
710 };
711
712 static const struct regmap_config tas2770_i2c_regmap;
713
tas2770_codec_probe(struct snd_soc_component * component)714 static int tas2770_codec_probe(struct snd_soc_component *component)
715 {
716 struct tas2770_priv *tas2770 =
717 snd_soc_component_get_drvdata(component);
718 int ret;
719
720 tas2770->component = component;
721
722 if (tas2770->sdz_gpio) {
723 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
724 usleep_range(1000, 2000);
725 }
726
727 tas2770_reset(tas2770);
728 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap);
729
730 if (tas2770->i_sense_slot != -1 && tas2770->v_sense_slot != -1) {
731 ret = tas2770_set_ivsense_transmit(tas2770, tas2770->i_sense_slot,
732 tas2770->v_sense_slot);
733
734 if (ret < 0)
735 return ret;
736 }
737
738 if (tas2770->pdm_slot != -1) {
739 ret = tas2770_set_pdm_transmit(tas2770, tas2770->pdm_slot);
740
741 if (ret < 0)
742 return ret;
743 }
744
745 return 0;
746 }
747
748 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
749 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -10050, 50, 0);
750
751 static const struct snd_kcontrol_new tas2770_snd_controls[] = {
752 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
753 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
754 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
755 tas2770_digital_tlv),
756 };
757
758 static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
759 .probe = tas2770_codec_probe,
760 .suspend = tas2770_codec_suspend,
761 .resume = tas2770_codec_resume,
762 .controls = tas2770_snd_controls,
763 .num_controls = ARRAY_SIZE(tas2770_snd_controls),
764 .dapm_widgets = tas2770_dapm_widgets,
765 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets),
766 .dapm_routes = tas2770_audio_map,
767 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map),
768 .idle_bias_on = 1,
769 .endianness = 1,
770 };
771
tas2770_register_codec(struct tas2770_priv * tas2770)772 static int tas2770_register_codec(struct tas2770_priv *tas2770)
773 {
774 return devm_snd_soc_register_component(tas2770->dev,
775 &soc_component_driver_tas2770,
776 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
777 }
778
779 static const struct reg_default tas2770_reg_defaults[] = {
780 { TAS2770_PAGE, 0x00 },
781 { TAS2770_SW_RST, 0x00 },
782 { TAS2770_PWR_CTRL, 0x0e },
783 { TAS2770_PLAY_CFG_REG0, 0x10 },
784 { TAS2770_PLAY_CFG_REG1, 0x01 },
785 { TAS2770_PLAY_CFG_REG2, 0x00 },
786 { TAS2770_MSC_CFG_REG0, 0x07 },
787 { TAS2770_TDM_CFG_REG1, 0x02 },
788 { TAS2770_TDM_CFG_REG2, 0x0a },
789 { TAS2770_TDM_CFG_REG3, 0x10 },
790 { TAS2770_INT_MASK_REG0, 0xfc },
791 { TAS2770_INT_MASK_REG1, 0xb1 },
792 { TAS2770_INT_CFG, 0x05 },
793 { TAS2770_MISC_IRQ, 0x81 },
794 { TAS2770_CLK_CGF, 0x0c },
795
796 };
797
tas2770_volatile(struct device * dev,unsigned int reg)798 static bool tas2770_volatile(struct device *dev, unsigned int reg)
799 {
800 switch (reg) {
801 case TAS2770_PAGE: /* regmap implementation requires this */
802 case TAS2770_SW_RST: /* always clears after write */
803 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
804 case TAS2770_LVE_INT_REG0:
805 case TAS2770_LVE_INT_REG1:
806 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
807 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
808 case TAS2770_VBAT_MSB:
809 case TAS2770_VBAT_LSB:
810 case TAS2770_TEMP_MSB:
811 case TAS2770_TEMP_LSB:
812 return true;
813 }
814
815 return false;
816 }
817
tas2770_writeable(struct device * dev,unsigned int reg)818 static bool tas2770_writeable(struct device *dev, unsigned int reg)
819 {
820 switch (reg) {
821 case TAS2770_LVE_INT_REG0:
822 case TAS2770_LVE_INT_REG1:
823 case TAS2770_LAT_INT_REG0:
824 case TAS2770_LAT_INT_REG1:
825 case TAS2770_VBAT_MSB:
826 case TAS2770_VBAT_LSB:
827 case TAS2770_TEMP_MSB:
828 case TAS2770_TEMP_LSB:
829 case TAS2770_TDM_CLK_DETC:
830 case TAS2770_REV_AND_GPID:
831 return false;
832 }
833
834 return true;
835 }
836
837 static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
838 {
839 .range_min = 0,
840 .range_max = 1 * 128,
841 .selector_reg = TAS2770_PAGE,
842 .selector_mask = 0xff,
843 .selector_shift = 0,
844 .window_start = 0,
845 .window_len = 128,
846 },
847 };
848
849 static const struct regmap_config tas2770_i2c_regmap = {
850 .reg_bits = 8,
851 .val_bits = 8,
852 .writeable_reg = tas2770_writeable,
853 .volatile_reg = tas2770_volatile,
854 .reg_defaults = tas2770_reg_defaults,
855 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
856 .cache_type = REGCACHE_RBTREE,
857 .ranges = tas2770_regmap_ranges,
858 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
859 .max_register = 1 * 128,
860 };
861
tas2770_parse_dt(struct device * dev,struct tas2770_priv * tas2770)862 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
863 {
864 int rc = 0;
865
866 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
867 &tas2770->i_sense_slot);
868 if (rc) {
869 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
870 "ti,imon-slot-no");
871
872 tas2770->i_sense_slot = -1;
873 }
874
875 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
876 &tas2770->v_sense_slot);
877 if (rc) {
878 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
879 "ti,vmon-slot-no");
880
881 tas2770->v_sense_slot = -1;
882 }
883
884 rc = fwnode_property_read_u32(dev->fwnode, "ti,pdm-slot-no",
885 &tas2770->pdm_slot);
886 if (rc)
887 tas2770->pdm_slot = -1;
888
889 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
890 if (IS_ERR(tas2770->sdz_gpio)) {
891 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
892 return -EPROBE_DEFER;
893
894 tas2770->sdz_gpio = NULL;
895 }
896
897 return 0;
898 }
899
tas2770_i2c_probe(struct i2c_client * client)900 static int tas2770_i2c_probe(struct i2c_client *client)
901 {
902 struct tas2770_priv *tas2770;
903 int result;
904
905 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
906 GFP_KERNEL);
907 if (!tas2770)
908 return -ENOMEM;
909
910 tas2770->dev = &client->dev;
911 i2c_set_clientdata(client, tas2770);
912 dev_set_drvdata(&client->dev, tas2770);
913
914 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
915 if (IS_ERR(tas2770->regmap)) {
916 result = PTR_ERR(tas2770->regmap);
917 dev_err(&client->dev, "Failed to allocate register map: %d\n",
918 result);
919 return result;
920 }
921
922 if (client->dev.of_node) {
923 result = tas2770_parse_dt(&client->dev, tas2770);
924 if (result) {
925 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
926 __func__);
927 return result;
928 }
929 }
930
931 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
932 GPIOD_OUT_HIGH);
933 if (IS_ERR(tas2770->reset_gpio)) {
934 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
935 tas2770->reset_gpio = NULL;
936 return -EPROBE_DEFER;
937 }
938 }
939
940 if (IS_REACHABLE(CONFIG_HWMON)) {
941 struct device *hwmon;
942
943 hwmon = devm_hwmon_device_register_with_info(&client->dev, "tas2770",
944 tas2770,
945 &tas2770_hwmon_chip_info,
946 NULL);
947 if (IS_ERR(hwmon)) {
948 return dev_err_probe(&client->dev, PTR_ERR(hwmon),
949 "Failed to register temp sensor\n");
950 }
951 }
952
953 result = tas2770_register_codec(tas2770);
954 if (result)
955 dev_err(tas2770->dev, "Register codec failed.\n");
956
957 return result;
958 }
959
960 static const struct i2c_device_id tas2770_i2c_id[] = {
961 { "tas2770"},
962 { }
963 };
964 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
965
966 #if defined(CONFIG_OF)
967 static const struct of_device_id tas2770_of_match[] = {
968 { .compatible = "ti,tas2770" },
969 {},
970 };
971 MODULE_DEVICE_TABLE(of, tas2770_of_match);
972 #endif
973
974 static struct i2c_driver tas2770_i2c_driver = {
975 .driver = {
976 .name = "tas2770",
977 .of_match_table = of_match_ptr(tas2770_of_match),
978 },
979 .probe = tas2770_i2c_probe,
980 .id_table = tas2770_i2c_id,
981 };
982 module_i2c_driver(tas2770_i2c_driver);
983
984 MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>");
985 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
986 MODULE_LICENSE("GPL v2");
987