1 // SPDX-License-Identifier: GPL-2.0
2
3 // Copyright (c) 2019 MediaTek Inc.
4
5 #include <linux/module.h>
6 #include <linux/kernel.h>
7 #include <linux/err.h>
8 #include <linux/i2c.h>
9 #include <linux/pm_runtime.h>
10 #include <linux/delay.h>
11 #include <sound/soc.h>
12 #include <sound/tlv.h>
13 #include <sound/pcm_params.h>
14
15 #include "mt6660.h"
16
17 struct reg_size_table {
18 u32 addr;
19 u8 size;
20 };
21
22 static const struct reg_size_table mt6660_reg_size_table[] = {
23 { MT6660_REG_HPF1_COEF, 4 },
24 { MT6660_REG_HPF2_COEF, 4 },
25 { MT6660_REG_TDM_CFG3, 2 },
26 { MT6660_REG_RESV17, 2 },
27 { MT6660_REG_RESV23, 2 },
28 { MT6660_REG_SIGMAX, 2 },
29 { MT6660_REG_DEVID, 2 },
30 { MT6660_REG_HCLIP_CTRL, 2 },
31 { MT6660_REG_DA_GAIN, 2 },
32 };
33
34 static int mt6660_get_reg_size(uint32_t addr)
35 {
36 int i;
37
38 for (i = 0; i < ARRAY_SIZE(mt6660_reg_size_table); i++) {
39 if (mt6660_reg_size_table[i].addr == addr)
40 return mt6660_reg_size_table[i].size;
41 }
42 return 1;
43 }
44
45 static int mt6660_reg_write(void *context, unsigned int reg, unsigned int val)
46 {
47 struct mt6660_chip *chip = context;
48 int size = mt6660_get_reg_size(reg);
49 u8 reg_data[4];
50 int i;
51
52 for (i = 0; i < size; i++)
53 reg_data[size - i - 1] = (val >> (8 * i)) & 0xff;
54
55 return i2c_smbus_write_i2c_block_data(chip->i2c, reg, size, reg_data);
56 }
57
58 static int mt6660_reg_read(void *context, unsigned int reg, unsigned int *val)
59 {
60 struct mt6660_chip *chip = context;
61 int size = mt6660_get_reg_size(reg);
62 int i, ret;
63 u8 data[4];
64 u32 reg_data = 0;
65
66 ret = i2c_smbus_read_i2c_block_data(chip->i2c, reg, size, data);
67 if (ret < 0)
68 return ret;
69 for (i = 0; i < size; i++) {
70 reg_data <<= 8;
71 reg_data |= data[i];
72 }
73 *val = reg_data;
74 return 0;
75 }
76
77 static const struct regmap_config mt6660_regmap_config = {
78 .reg_bits = 8,
79 .val_bits = 32,
80 .reg_write = mt6660_reg_write,
81 .reg_read = mt6660_reg_read,
82 };
83
84 static int mt6660_codec_dac_event(struct snd_soc_dapm_widget *w,
85 struct snd_kcontrol *kcontrol, int event)
86 {
87 if (event == SND_SOC_DAPM_POST_PMU)
88 usleep_range(1000, 1100);
89 return 0;
90 }
91
92 static int mt6660_codec_classd_event(struct snd_soc_dapm_widget *w,
93 struct snd_kcontrol *kcontrol, int event)
94 {
95 struct snd_soc_component *component =
96 snd_soc_dapm_to_component(w->dapm);
97 int ret;
98
99 switch (event) {
100 case SND_SOC_DAPM_PRE_PMU:
101 dev_dbg(component->dev,
102 "%s: before classd turn on\n", __func__);
103 /* config to adaptive mode */
104 ret = snd_soc_component_update_bits(component,
105 MT6660_REG_BST_CTRL, 0x03, 0x03);
106 if (ret < 0) {
107 dev_err(component->dev, "config mode adaptive fail\n");
108 return ret;
109 }
110 break;
111 case SND_SOC_DAPM_POST_PMU:
112 /* voltage sensing enable */
113 ret = snd_soc_component_update_bits(component,
114 MT6660_REG_RESV7, 0x04, 0x04);
115 if (ret < 0) {
116 dev_err(component->dev,
117 "enable voltage sensing fail\n");
118 return ret;
119 }
120 dev_dbg(component->dev, "Amp on\n");
121 break;
122 case SND_SOC_DAPM_PRE_PMD:
123 dev_dbg(component->dev, "Amp off\n");
124 /* voltage sensing disable */
125 ret = snd_soc_component_update_bits(component,
126 MT6660_REG_RESV7, 0x04, 0x00);
127 if (ret < 0) {
128 dev_err(component->dev,
129 "disable voltage sensing fail\n");
130 return ret;
131 }
132 /* pop-noise improvement 1 */
133 ret = snd_soc_component_update_bits(component,
134 MT6660_REG_RESV10, 0x10, 0x10);
135 if (ret < 0) {
136 dev_err(component->dev,
137 "pop-noise improvement 1 fail\n");
138 return ret;
139 }
140 break;
141 case SND_SOC_DAPM_POST_PMD:
142 dev_dbg(component->dev,
143 "%s: after classd turn off\n", __func__);
144 /* pop-noise improvement 2 */
145 ret = snd_soc_component_update_bits(component,
146 MT6660_REG_RESV10, 0x10, 0x00);
147 if (ret < 0) {
148 dev_err(component->dev,
149 "pop-noise improvement 2 fail\n");
150 return ret;
151 }
152 /* config to off mode */
153 ret = snd_soc_component_update_bits(component,
154 MT6660_REG_BST_CTRL, 0x03, 0x00);
155 if (ret < 0) {
156 dev_err(component->dev, "config mode off fail\n");
157 return ret;
158 }
159 break;
160 }
161 return 0;
162 }
163
164 static const struct snd_soc_dapm_widget mt6660_component_dapm_widgets[] = {
165 SND_SOC_DAPM_DAC_E("DAC", NULL, MT6660_REG_PLL_CFG1,
166 0, 1, mt6660_codec_dac_event, SND_SOC_DAPM_POST_PMU),
167 SND_SOC_DAPM_ADC("VI ADC", NULL, SND_SOC_NOPM, 0, 0),
168 SND_SOC_DAPM_PGA("PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
169 SND_SOC_DAPM_OUT_DRV_E("ClassD", MT6660_REG_SYSTEM_CTRL, 2, 0,
170 NULL, 0, mt6660_codec_classd_event,
171 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
172 SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
173 SND_SOC_DAPM_OUTPUT("OUTP"),
174 SND_SOC_DAPM_OUTPUT("OUTN"),
175 };
176
177 static const struct snd_soc_dapm_route mt6660_component_dapm_routes[] = {
178 { "DAC", NULL, "aif_playback" },
179 { "PGA", NULL, "DAC" },
180 { "ClassD", NULL, "PGA" },
181 { "OUTP", NULL, "ClassD" },
182 { "OUTN", NULL, "ClassD" },
183 { "VI ADC", NULL, "ClassD" },
184 { "aif_capture", NULL, "VI ADC" },
185 };
186
187 static int mt6660_component_get_volsw(struct snd_kcontrol *kcontrol,
188 struct snd_ctl_elem_value *ucontrol)
189 {
190 struct snd_soc_component *component =
191 snd_soc_kcontrol_component(kcontrol);
192 struct mt6660_chip *chip = (struct mt6660_chip *)
193 snd_soc_component_get_drvdata(component);
194
195 ucontrol->value.integer.value[0] = chip->chip_rev & 0x0f;
196 return 0;
197 }
198
199 static const DECLARE_TLV_DB_SCALE(vol_ctl_tlv, -1155, 5, 0);
200
201 static const struct snd_kcontrol_new mt6660_component_snd_controls[] = {
202 SOC_SINGLE_TLV("Digital Volume", MT6660_REG_VOL_CTRL, 0, 255,
203 1, vol_ctl_tlv),
204 SOC_SINGLE("Hard Clip Switch", MT6660_REG_HCLIP_CTRL, 8, 1, 0),
205 SOC_SINGLE("Clip Switch", MT6660_REG_SPS_CTRL, 0, 1, 0),
206 SOC_SINGLE("Boost Mode", MT6660_REG_BST_CTRL, 0, 3, 0),
207 SOC_SINGLE("DRE Switch", MT6660_REG_DRE_CTRL, 0, 1, 0),
208 SOC_SINGLE("DC Protect Switch", MT6660_REG_DC_PROTECT_CTRL, 3, 1, 0),
209 SOC_SINGLE("Data Output Left Channel Selection",
210 MT6660_REG_DATAO_SEL, 3, 7, 0),
211 SOC_SINGLE("Data Output Right Channel Selection",
212 MT6660_REG_DATAO_SEL, 0, 7, 0),
213 SOC_SINGLE_EXT("T0 SEL", MT6660_REG_CALI_T0, 0, 7, 0,
214 snd_soc_get_volsw, NULL),
215 SOC_SINGLE_EXT("Chip Rev", MT6660_REG_DEVID, 8, 15, 0,
216 mt6660_component_get_volsw, NULL),
217 };
218
219 static int _mt6660_chip_power_on(struct mt6660_chip *chip, int on_off)
220 {
221 return regmap_write_bits(chip->regmap, MT6660_REG_SYSTEM_CTRL,
222 0x01, on_off ? 0x00 : 0x01);
223 }
224
225 struct reg_table {
226 uint32_t addr;
227 uint32_t mask;
228 uint32_t val;
229 };
230
231 static const struct reg_table mt6660_setting_table[] = {
232 { 0x20, 0x80, 0x00 },
233 { 0x30, 0x01, 0x00 },
234 { 0x50, 0x1c, 0x04 },
235 { 0xB1, 0x0c, 0x00 },
236 { 0xD3, 0x03, 0x03 },
237 { 0xE0, 0x01, 0x00 },
238 { 0x98, 0x44, 0x04 },
239 { 0xB9, 0xff, 0x82 },
240 { 0xB7, 0x7777, 0x7273 },
241 { 0xB6, 0x07, 0x03 },
242 { 0x6B, 0xe0, 0x20 },
243 { 0x07, 0xff, 0x70 },
244 { 0xBB, 0xff, 0x20 },
245 { 0x69, 0xff, 0x40 },
246 { 0xBD, 0xffff, 0x17f8 },
247 { 0x70, 0xff, 0x15 },
248 { 0x7C, 0xff, 0x00 },
249 { 0x46, 0xff, 0x1d },
250 { 0x1A, 0xffffffff, 0x7fdb7ffe },
251 { 0x1B, 0xffffffff, 0x7fdb7ffe },
252 { 0x51, 0xff, 0x58 },
253 { 0xA2, 0xff, 0xce },
254 { 0x33, 0xffff, 0x7fff },
255 { 0x4C, 0xffff, 0x0116 },
256 { 0x16, 0x1800, 0x0800 },
257 { 0x68, 0x1f, 0x07 },
258 };
259
260 static int mt6660_component_setting(struct snd_soc_component *component)
261 {
262 struct mt6660_chip *chip = snd_soc_component_get_drvdata(component);
263 int ret = 0;
264 size_t i = 0;
265
266 ret = _mt6660_chip_power_on(chip, 1);
267 if (ret < 0) {
268 dev_err(component->dev, "%s chip power on failed\n", __func__);
269 return ret;
270 }
271
272 for (i = 0; i < ARRAY_SIZE(mt6660_setting_table); i++) {
273 ret = snd_soc_component_update_bits(component,
274 mt6660_setting_table[i].addr,
275 mt6660_setting_table[i].mask,
276 mt6660_setting_table[i].val);
277 if (ret < 0) {
278 dev_err(component->dev, "%s update 0x%02x failed\n",
279 __func__, mt6660_setting_table[i].addr);
280 return ret;
281 }
282 }
283
284 ret = _mt6660_chip_power_on(chip, 0);
285 if (ret < 0) {
286 dev_err(component->dev, "%s chip power off failed\n", __func__);
287 return ret;
288 }
289
290 return 0;
291 }
292
293 static int mt6660_component_probe(struct snd_soc_component *component)
294 {
295 struct mt6660_chip *chip = snd_soc_component_get_drvdata(component);
296 int ret;
297
298 dev_dbg(component->dev, "%s\n", __func__);
299 snd_soc_component_init_regmap(component, chip->regmap);
300
301 ret = mt6660_component_setting(component);
302 if (ret < 0)
303 dev_err(chip->dev, "mt6660 component setting failed\n");
304
305 return ret;
306 }
307
308 static void mt6660_component_remove(struct snd_soc_component *component)
309 {
310 dev_dbg(component->dev, "%s\n", __func__);
311 snd_soc_component_exit_regmap(component);
312 }
313
314 static const struct snd_soc_component_driver mt6660_component_driver = {
315 .probe = mt6660_component_probe,
316 .remove = mt6660_component_remove,
317
318 .controls = mt6660_component_snd_controls,
319 .num_controls = ARRAY_SIZE(mt6660_component_snd_controls),
320 .dapm_widgets = mt6660_component_dapm_widgets,
321 .num_dapm_widgets = ARRAY_SIZE(mt6660_component_dapm_widgets),
322 .dapm_routes = mt6660_component_dapm_routes,
323 .num_dapm_routes = ARRAY_SIZE(mt6660_component_dapm_routes),
324
325 .idle_bias_on = false, /* idle_bias_off = true */
326 .endianness = 1,
327 };
328
329 static int mt6660_component_aif_hw_params(struct snd_pcm_substream *substream,
330 struct snd_pcm_hw_params *hw_params, struct snd_soc_dai *dai)
331 {
332 int word_len = params_physical_width(hw_params);
333 int aud_bit = params_width(hw_params);
334 u16 reg_data = 0;
335 int ret;
336
337 dev_dbg(dai->dev, "%s: ++\n", __func__);
338 dev_dbg(dai->dev, "format: 0x%08x\n", params_format(hw_params));
339 dev_dbg(dai->dev, "rate: 0x%08x\n", params_rate(hw_params));
340 dev_dbg(dai->dev, "word_len: %d, aud_bit: %d\n", word_len, aud_bit);
341 if (word_len > 32 || word_len < 16) {
342 dev_err(dai->dev, "not supported word length\n");
343 return -ENOTSUPP;
344 }
345 switch (aud_bit) {
346 case 16:
347 reg_data = 3;
348 break;
349 case 18:
350 reg_data = 2;
351 break;
352 case 20:
353 reg_data = 1;
354 break;
355 case 24:
356 case 32:
357 reg_data = 0;
358 break;
359 default:
360 return -ENOTSUPP;
361 }
362 ret = snd_soc_component_update_bits(dai->component,
363 MT6660_REG_SERIAL_CFG1, 0xc0, (reg_data << 6));
364 if (ret < 0) {
365 dev_err(dai->dev, "config aud bit fail\n");
366 return ret;
367 }
368 ret = snd_soc_component_update_bits(dai->component,
369 MT6660_REG_TDM_CFG3, 0x3f0, word_len << 4);
370 if (ret < 0) {
371 dev_err(dai->dev, "config word len fail\n");
372 return ret;
373 }
374 dev_dbg(dai->dev, "%s: --\n", __func__);
375 return 0;
376 }
377
378 static const struct snd_soc_dai_ops mt6660_component_aif_ops = {
379 .hw_params = mt6660_component_aif_hw_params,
380 };
381
382 #define STUB_RATES SNDRV_PCM_RATE_8000_192000
383 #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
384 SNDRV_PCM_FMTBIT_U16_LE | \
385 SNDRV_PCM_FMTBIT_S24_LE | \
386 SNDRV_PCM_FMTBIT_U24_LE | \
387 SNDRV_PCM_FMTBIT_S32_LE | \
388 SNDRV_PCM_FMTBIT_U32_LE)
389
390 static struct snd_soc_dai_driver mt6660_codec_dai = {
391 .name = "mt6660-aif",
392 .playback = {
393 .stream_name = "aif_playback",
394 .channels_min = 1,
395 .channels_max = 2,
396 .rates = STUB_RATES,
397 .formats = STUB_FORMATS,
398 },
399 .capture = {
400 .stream_name = "aif_capture",
401 .channels_min = 1,
402 .channels_max = 2,
403 .rates = STUB_RATES,
404 .formats = STUB_FORMATS,
405 },
406 /* dai properties */
407 .symmetric_rate = 1,
408 .symmetric_channels = 1,
409 .symmetric_sample_bits = 1,
410 /* dai operations */
411 .ops = &mt6660_component_aif_ops,
412 };
413
414 static int _mt6660_chip_id_check(struct mt6660_chip *chip)
415 {
416 int ret;
417 unsigned int val;
418
419 ret = regmap_read(chip->regmap, MT6660_REG_DEVID, &val);
420 if (ret < 0)
421 return ret;
422 val &= 0x0ff0;
423 if (val != 0x00e0 && val != 0x01e0) {
424 dev_err(chip->dev, "%s id(%x) not match\n", __func__, val);
425 return -ENODEV;
426 }
427 return 0;
428 }
429
430 static int _mt6660_chip_sw_reset(struct mt6660_chip *chip)
431 {
432 int ret;
433
434 /* turn on main pll first, then trigger reset */
435 ret = regmap_write(chip->regmap, MT6660_REG_SYSTEM_CTRL, 0x00);
436 if (ret < 0)
437 return ret;
438 ret = regmap_write(chip->regmap, MT6660_REG_SYSTEM_CTRL, 0x80);
439 if (ret < 0)
440 return ret;
441 msleep(30);
442 return 0;
443 }
444
445 static int _mt6660_read_chip_revision(struct mt6660_chip *chip)
446 {
447 int ret;
448 unsigned int val;
449
450 ret = regmap_read(chip->regmap, MT6660_REG_DEVID, &val);
451 if (ret < 0) {
452 dev_err(chip->dev, "get chip revision fail\n");
453 return ret;
454 }
455 chip->chip_rev = val&0xff;
456 dev_info(chip->dev, "%s chip_rev = %x\n", __func__, chip->chip_rev);
457 return 0;
458 }
459
460 static int mt6660_i2c_probe(struct i2c_client *client)
461 {
462 struct mt6660_chip *chip = NULL;
463 int ret;
464
465 dev_dbg(&client->dev, "%s\n", __func__);
466 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
467 if (!chip)
468 return -ENOMEM;
469 chip->i2c = client;
470 chip->dev = &client->dev;
471 mutex_init(&chip->io_lock);
472 i2c_set_clientdata(client, chip);
473
474 chip->regmap = devm_regmap_init(&client->dev,
475 NULL, chip, &mt6660_regmap_config);
476 if (IS_ERR(chip->regmap)) {
477 ret = PTR_ERR(chip->regmap);
478 dev_err(&client->dev, "failed to initialise regmap: %d\n", ret);
479 return ret;
480 }
481
482 /* chip reset first */
483 ret = _mt6660_chip_sw_reset(chip);
484 if (ret < 0) {
485 dev_err(chip->dev, "chip reset fail\n");
486 goto probe_fail;
487 }
488 /* chip power on */
489 ret = _mt6660_chip_power_on(chip, 1);
490 if (ret < 0) {
491 dev_err(chip->dev, "chip power on 2 fail\n");
492 goto probe_fail;
493 }
494 /* chip devid check */
495 ret = _mt6660_chip_id_check(chip);
496 if (ret < 0) {
497 dev_err(chip->dev, "chip id check fail\n");
498 goto probe_fail;
499 }
500 /* chip revision get */
501 ret = _mt6660_read_chip_revision(chip);
502 if (ret < 0) {
503 dev_err(chip->dev, "read chip revision fail\n");
504 goto probe_fail;
505 }
506 pm_runtime_set_active(chip->dev);
507 pm_runtime_enable(chip->dev);
508
509 ret = devm_snd_soc_register_component(chip->dev,
510 &mt6660_component_driver,
511 &mt6660_codec_dai, 1);
512 if (ret)
513 pm_runtime_disable(chip->dev);
514
515 return ret;
516
517 probe_fail:
518 _mt6660_chip_power_on(chip, 0);
519 mutex_destroy(&chip->io_lock);
520 return ret;
521 }
522
523 static void mt6660_i2c_remove(struct i2c_client *client)
524 {
525 struct mt6660_chip *chip = i2c_get_clientdata(client);
526
527 pm_runtime_disable(chip->dev);
528 pm_runtime_set_suspended(chip->dev);
529 mutex_destroy(&chip->io_lock);
530 }
531
532 static int __maybe_unused mt6660_i2c_runtime_suspend(struct device *dev)
533 {
534 struct mt6660_chip *chip = dev_get_drvdata(dev);
535
536 dev_dbg(dev, "enter low power mode\n");
537 return regmap_update_bits(chip->regmap,
538 MT6660_REG_SYSTEM_CTRL, 0x01, 0x01);
539 }
540
541 static int __maybe_unused mt6660_i2c_runtime_resume(struct device *dev)
542 {
543 struct mt6660_chip *chip = dev_get_drvdata(dev);
544
545 dev_dbg(dev, "exit low power mode\n");
546 return regmap_update_bits(chip->regmap,
547 MT6660_REG_SYSTEM_CTRL, 0x01, 0x00);
548 }
549
550 static const struct dev_pm_ops mt6660_dev_pm_ops = {
551 SET_RUNTIME_PM_OPS(mt6660_i2c_runtime_suspend,
552 mt6660_i2c_runtime_resume, NULL)
553 };
554
555 static const struct of_device_id __maybe_unused mt6660_of_id[] = {
556 { .compatible = "mediatek,mt6660",},
557 {},
558 };
559 MODULE_DEVICE_TABLE(of, mt6660_of_id);
560
561 static const struct i2c_device_id mt6660_i2c_id[] = {
562 {"mt6660" },
563 {},
564 };
565 MODULE_DEVICE_TABLE(i2c, mt6660_i2c_id);
566
567 static struct i2c_driver mt6660_i2c_driver = {
568 .driver = {
569 .name = "mt6660",
570 .of_match_table = of_match_ptr(mt6660_of_id),
571 .pm = &mt6660_dev_pm_ops,
572 },
573 .probe = mt6660_i2c_probe,
574 .remove = mt6660_i2c_remove,
575 .id_table = mt6660_i2c_id,
576 };
577 module_i2c_driver(mt6660_i2c_driver);
578
579 MODULE_AUTHOR("Jeff Chang <jeff_chang@richtek.com>");
580 MODULE_DESCRIPTION("MT6660 SPKAMP Driver");
581 MODULE_LICENSE("GPL");
582 MODULE_VERSION("1.0.8_G");
583
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.