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
161 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
162 SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
163 SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
164 SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
165 SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
166 SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
167 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
168 SND_SOC_DAPM_OUTPUT("OUT"),
169 SND_SOC_DAPM_SIGGEN("VMON"),
170 SND_SOC_DAPM_SIGGEN("IMON")
171 };
172
173 static const struct snd_soc_dapm_route tas2770_audio_map[] = {
174 {"ASI1 Sel", "I2C offset", "ASI1"},
175 {"ASI1 Sel", "Left", "ASI1"},
176 {"ASI1 Sel", "Right", "ASI1"},
177 {"ASI1 Sel", "LeftRightDiv2", "ASI1"},
178 {"DAC", NULL, "ASI1 Sel"},
179 {"OUT", NULL, "DAC"},
180 {"ISENSE", "Switch", "IMON"},
181 {"VSENSE", "Switch", "VMON"},
182 };
183
tas2770_mute(struct snd_soc_dai * dai,int mute,int direction)184 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
185 {
186 struct snd_soc_component *component = dai->component;
187 struct tas2770_priv *tas2770 =
188 snd_soc_component_get_drvdata(component);
189
190 tas2770->unmuted = !mute;
191 return tas2770_update_pwr_ctrl(tas2770);
192 }
193
tas2770_set_bitwidth(struct tas2770_priv * tas2770,int bitwidth)194 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
195 {
196 int ret;
197 struct snd_soc_component *component = tas2770->component;
198
199 switch (bitwidth) {
200 case SNDRV_PCM_FORMAT_S16_LE:
201 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
202 TAS2770_TDM_CFG_REG2_RXW_MASK,
203 TAS2770_TDM_CFG_REG2_RXW_16BITS);
204 tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
205 break;
206 case SNDRV_PCM_FORMAT_S24_LE:
207 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
208 TAS2770_TDM_CFG_REG2_RXW_MASK,
209 TAS2770_TDM_CFG_REG2_RXW_24BITS);
210 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
211 break;
212 case SNDRV_PCM_FORMAT_S32_LE:
213 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
214 TAS2770_TDM_CFG_REG2_RXW_MASK,
215 TAS2770_TDM_CFG_REG2_RXW_32BITS);
216 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
217 break;
218
219 default:
220 return -EINVAL;
221 }
222
223 if (ret < 0)
224 return ret;
225
226 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
227 TAS2770_TDM_CFG_REG5_VSNS_MASK |
228 TAS2770_TDM_CFG_REG5_50_MASK,
229 TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
230 tas2770->v_sense_slot);
231 if (ret < 0)
232 return ret;
233
234 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
235 TAS2770_TDM_CFG_REG6_ISNS_MASK |
236 TAS2770_TDM_CFG_REG6_50_MASK,
237 TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
238 tas2770->i_sense_slot);
239 if (ret < 0)
240 return ret;
241
242 return 0;
243 }
244
tas2770_set_samplerate(struct tas2770_priv * tas2770,int samplerate)245 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
246 {
247 struct snd_soc_component *component = tas2770->component;
248 int ramp_rate_val;
249 int ret;
250
251 switch (samplerate) {
252 case 48000:
253 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
254 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
255 break;
256 case 44100:
257 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
258 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
259 break;
260 case 96000:
261 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
262 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
263 break;
264 case 88200:
265 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
266 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
267 break;
268 case 192000:
269 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
270 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
271 break;
272 case 176400:
273 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
274 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
275 break;
276 default:
277 return -EINVAL;
278 }
279
280 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
281 TAS2770_TDM_CFG_REG0_SMP_MASK |
282 TAS2770_TDM_CFG_REG0_31_MASK,
283 ramp_rate_val);
284 if (ret < 0)
285 return ret;
286
287 return 0;
288 }
289
tas2770_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)290 static int tas2770_hw_params(struct snd_pcm_substream *substream,
291 struct snd_pcm_hw_params *params,
292 struct snd_soc_dai *dai)
293 {
294 struct snd_soc_component *component = dai->component;
295 struct tas2770_priv *tas2770 =
296 snd_soc_component_get_drvdata(component);
297 int ret;
298
299 ret = tas2770_set_bitwidth(tas2770, params_format(params));
300 if (ret)
301 return ret;
302
303 return tas2770_set_samplerate(tas2770, params_rate(params));
304 }
305
tas2770_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)306 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
307 {
308 struct snd_soc_component *component = dai->component;
309 struct tas2770_priv *tas2770 =
310 snd_soc_component_get_drvdata(component);
311 u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0;
312 int ret;
313
314 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
315 case SND_SOC_DAIFMT_CBC_CFC:
316 break;
317 default:
318 dev_err(tas2770->dev, "ASI invalid DAI clocking\n");
319 return -EINVAL;
320 }
321
322 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
323 case SND_SOC_DAIFMT_NB_IF:
324 invert_fpol = 1;
325 fallthrough;
326 case SND_SOC_DAIFMT_NB_NF:
327 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
328 break;
329 case SND_SOC_DAIFMT_IB_IF:
330 invert_fpol = 1;
331 fallthrough;
332 case SND_SOC_DAIFMT_IB_NF:
333 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
334 break;
335 default:
336 dev_err(tas2770->dev, "ASI format Inverse is not found\n");
337 return -EINVAL;
338 }
339
340 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
341 TAS2770_TDM_CFG_REG1_RX_MASK,
342 asi_cfg_1);
343 if (ret < 0)
344 return ret;
345
346 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
347 case SND_SOC_DAIFMT_I2S:
348 tdm_rx_start_slot = 1;
349 fpol_preinv = 0;
350 break;
351 case SND_SOC_DAIFMT_DSP_A:
352 tdm_rx_start_slot = 0;
353 fpol_preinv = 1;
354 break;
355 case SND_SOC_DAIFMT_DSP_B:
356 tdm_rx_start_slot = 1;
357 fpol_preinv = 1;
358 break;
359 case SND_SOC_DAIFMT_LEFT_J:
360 tdm_rx_start_slot = 0;
361 fpol_preinv = 1;
362 break;
363 default:
364 dev_err(tas2770->dev,
365 "DAI Format is not found, fmt=0x%x\n", fmt);
366 return -EINVAL;
367 }
368
369 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
370 TAS2770_TDM_CFG_REG1_MASK,
371 (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
372 if (ret < 0)
373 return ret;
374
375 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
376 TAS2770_TDM_CFG_REG0_FPOL_MASK,
377 (fpol_preinv ^ invert_fpol)
378 ? TAS2770_TDM_CFG_REG0_FPOL_RSING
379 : TAS2770_TDM_CFG_REG0_FPOL_FALING);
380 if (ret < 0)
381 return ret;
382
383 return 0;
384 }
385
tas2770_set_dai_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int slot_width)386 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
387 unsigned int tx_mask,
388 unsigned int rx_mask,
389 int slots, int slot_width)
390 {
391 struct snd_soc_component *component = dai->component;
392 int left_slot, right_slot;
393 int ret;
394
395 if (tx_mask == 0 || rx_mask != 0)
396 return -EINVAL;
397
398 left_slot = __ffs(tx_mask);
399 tx_mask &= ~(1 << left_slot);
400 if (tx_mask == 0) {
401 right_slot = left_slot;
402 } else {
403 right_slot = __ffs(tx_mask);
404 tx_mask &= ~(1 << right_slot);
405 }
406
407 if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
408 return -EINVAL;
409
410 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
411 TAS2770_TDM_CFG_REG3_30_MASK,
412 (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
413 if (ret < 0)
414 return ret;
415 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
416 TAS2770_TDM_CFG_REG3_RXS_MASK,
417 (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
418 if (ret < 0)
419 return ret;
420
421 switch (slot_width) {
422 case 16:
423 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
424 TAS2770_TDM_CFG_REG2_RXS_MASK,
425 TAS2770_TDM_CFG_REG2_RXS_16BITS);
426 break;
427 case 24:
428 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
429 TAS2770_TDM_CFG_REG2_RXS_MASK,
430 TAS2770_TDM_CFG_REG2_RXS_24BITS);
431 break;
432 case 32:
433 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
434 TAS2770_TDM_CFG_REG2_RXS_MASK,
435 TAS2770_TDM_CFG_REG2_RXS_32BITS);
436 break;
437 case 0:
438 /* Do not change slot width */
439 ret = 0;
440 break;
441 default:
442 ret = -EINVAL;
443 }
444
445 if (ret < 0)
446 return ret;
447
448 return 0;
449 }
450
451 static const struct snd_soc_dai_ops tas2770_dai_ops = {
452 .mute_stream = tas2770_mute,
453 .hw_params = tas2770_hw_params,
454 .set_fmt = tas2770_set_fmt,
455 .set_tdm_slot = tas2770_set_dai_tdm_slot,
456 .no_capture_mute = 1,
457 };
458
459 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
460 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
461
462 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
463 SNDRV_PCM_RATE_96000 |\
464 SNDRV_PCM_RATE_192000\
465 )
466
467 static struct snd_soc_dai_driver tas2770_dai_driver[] = {
468 {
469 .name = "tas2770 ASI1",
470 .id = 0,
471 .playback = {
472 .stream_name = "ASI1 Playback",
473 .channels_min = 1,
474 .channels_max = 2,
475 .rates = TAS2770_RATES,
476 .formats = TAS2770_FORMATS,
477 },
478 .capture = {
479 .stream_name = "ASI1 Capture",
480 .channels_min = 0,
481 .channels_max = 2,
482 .rates = TAS2770_RATES,
483 .formats = TAS2770_FORMATS,
484 },
485 .ops = &tas2770_dai_ops,
486 .symmetric_rate = 1,
487 },
488 };
489
490 static const struct regmap_config tas2770_i2c_regmap;
491
tas2770_codec_probe(struct snd_soc_component * component)492 static int tas2770_codec_probe(struct snd_soc_component *component)
493 {
494 struct tas2770_priv *tas2770 =
495 snd_soc_component_get_drvdata(component);
496
497 tas2770->component = component;
498
499 if (tas2770->sdz_gpio) {
500 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
501 usleep_range(1000, 2000);
502 }
503
504 tas2770_reset(tas2770);
505 regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap);
506
507 return 0;
508 }
509
510 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
511 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);
512
513 static const struct snd_kcontrol_new tas2770_snd_controls[] = {
514 SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
515 0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
516 SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
517 tas2770_digital_tlv),
518 };
519
520 static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
521 .probe = tas2770_codec_probe,
522 .suspend = tas2770_codec_suspend,
523 .resume = tas2770_codec_resume,
524 .controls = tas2770_snd_controls,
525 .num_controls = ARRAY_SIZE(tas2770_snd_controls),
526 .dapm_widgets = tas2770_dapm_widgets,
527 .num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets),
528 .dapm_routes = tas2770_audio_map,
529 .num_dapm_routes = ARRAY_SIZE(tas2770_audio_map),
530 .idle_bias_on = 1,
531 .endianness = 1,
532 };
533
tas2770_register_codec(struct tas2770_priv * tas2770)534 static int tas2770_register_codec(struct tas2770_priv *tas2770)
535 {
536 return devm_snd_soc_register_component(tas2770->dev,
537 &soc_component_driver_tas2770,
538 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
539 }
540
541 static const struct reg_default tas2770_reg_defaults[] = {
542 { TAS2770_PAGE, 0x00 },
543 { TAS2770_SW_RST, 0x00 },
544 { TAS2770_PWR_CTRL, 0x0e },
545 { TAS2770_PLAY_CFG_REG0, 0x10 },
546 { TAS2770_PLAY_CFG_REG1, 0x01 },
547 { TAS2770_PLAY_CFG_REG2, 0x00 },
548 { TAS2770_MSC_CFG_REG0, 0x07 },
549 { TAS2770_TDM_CFG_REG1, 0x02 },
550 { TAS2770_TDM_CFG_REG2, 0x0a },
551 { TAS2770_TDM_CFG_REG3, 0x10 },
552 { TAS2770_INT_MASK_REG0, 0xfc },
553 { TAS2770_INT_MASK_REG1, 0xb1 },
554 { TAS2770_INT_CFG, 0x05 },
555 { TAS2770_MISC_IRQ, 0x81 },
556 { TAS2770_CLK_CGF, 0x0c },
557
558 };
559
tas2770_volatile(struct device * dev,unsigned int reg)560 static bool tas2770_volatile(struct device *dev, unsigned int reg)
561 {
562 switch (reg) {
563 case TAS2770_PAGE: /* regmap implementation requires this */
564 case TAS2770_SW_RST: /* always clears after write */
565 case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
566 case TAS2770_LVE_INT_REG0:
567 case TAS2770_LVE_INT_REG1:
568 case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
569 case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
570 case TAS2770_VBAT_MSB:
571 case TAS2770_VBAT_LSB:
572 case TAS2770_TEMP_MSB:
573 case TAS2770_TEMP_LSB:
574 return true;
575 }
576
577 return false;
578 }
579
tas2770_writeable(struct device * dev,unsigned int reg)580 static bool tas2770_writeable(struct device *dev, unsigned int reg)
581 {
582 switch (reg) {
583 case TAS2770_LVE_INT_REG0:
584 case TAS2770_LVE_INT_REG1:
585 case TAS2770_LAT_INT_REG0:
586 case TAS2770_LAT_INT_REG1:
587 case TAS2770_VBAT_MSB:
588 case TAS2770_VBAT_LSB:
589 case TAS2770_TEMP_MSB:
590 case TAS2770_TEMP_LSB:
591 case TAS2770_TDM_CLK_DETC:
592 case TAS2770_REV_AND_GPID:
593 return false;
594 }
595
596 return true;
597 }
598
599 static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
600 {
601 .range_min = 0,
602 .range_max = 1 * 128,
603 .selector_reg = TAS2770_PAGE,
604 .selector_mask = 0xff,
605 .selector_shift = 0,
606 .window_start = 0,
607 .window_len = 128,
608 },
609 };
610
611 static const struct regmap_config tas2770_i2c_regmap = {
612 .reg_bits = 8,
613 .val_bits = 8,
614 .writeable_reg = tas2770_writeable,
615 .volatile_reg = tas2770_volatile,
616 .reg_defaults = tas2770_reg_defaults,
617 .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
618 .cache_type = REGCACHE_RBTREE,
619 .ranges = tas2770_regmap_ranges,
620 .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
621 .max_register = 1 * 128,
622 };
623
tas2770_parse_dt(struct device * dev,struct tas2770_priv * tas2770)624 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
625 {
626 int rc = 0;
627
628 rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
629 &tas2770->i_sense_slot);
630 if (rc) {
631 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
632 "ti,imon-slot-no");
633
634 tas2770->i_sense_slot = 0;
635 }
636
637 rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
638 &tas2770->v_sense_slot);
639 if (rc) {
640 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
641 "ti,vmon-slot-no");
642
643 tas2770->v_sense_slot = 2;
644 }
645
646 tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
647 if (IS_ERR(tas2770->sdz_gpio)) {
648 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
649 return -EPROBE_DEFER;
650
651 tas2770->sdz_gpio = NULL;
652 }
653
654 return 0;
655 }
656
tas2770_i2c_probe(struct i2c_client * client)657 static int tas2770_i2c_probe(struct i2c_client *client)
658 {
659 struct tas2770_priv *tas2770;
660 int result;
661
662 tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
663 GFP_KERNEL);
664 if (!tas2770)
665 return -ENOMEM;
666
667 tas2770->dev = &client->dev;
668 i2c_set_clientdata(client, tas2770);
669 dev_set_drvdata(&client->dev, tas2770);
670
671 tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
672 if (IS_ERR(tas2770->regmap)) {
673 result = PTR_ERR(tas2770->regmap);
674 dev_err(&client->dev, "Failed to allocate register map: %d\n",
675 result);
676 return result;
677 }
678
679 if (client->dev.of_node) {
680 result = tas2770_parse_dt(&client->dev, tas2770);
681 if (result) {
682 dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
683 __func__);
684 return result;
685 }
686 }
687
688 tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
689 GPIOD_OUT_HIGH);
690 if (IS_ERR(tas2770->reset_gpio)) {
691 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
692 tas2770->reset_gpio = NULL;
693 return -EPROBE_DEFER;
694 }
695 }
696
697 result = tas2770_register_codec(tas2770);
698 if (result)
699 dev_err(tas2770->dev, "Register codec failed.\n");
700
701 return result;
702 }
703
704 static const struct i2c_device_id tas2770_i2c_id[] = {
705 { "tas2770", 0},
706 { }
707 };
708 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
709
710 #if defined(CONFIG_OF)
711 static const struct of_device_id tas2770_of_match[] = {
712 { .compatible = "ti,tas2770" },
713 {},
714 };
715 MODULE_DEVICE_TABLE(of, tas2770_of_match);
716 #endif
717
718 static struct i2c_driver tas2770_i2c_driver = {
719 .driver = {
720 .name = "tas2770",
721 .of_match_table = of_match_ptr(tas2770_of_match),
722 },
723 .probe = tas2770_i2c_probe,
724 .id_table = tas2770_i2c_id,
725 };
726 module_i2c_driver(tas2770_i2c_driver);
727
728 MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>");
729 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
730 MODULE_LICENSE("GPL v2");
731