xref: /openbmc/linux/sound/soc/samsung/midas_wm1811.c (revision c91e6714)
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Midas audio support
4 //
5 // Copyright (C) 2018 Simon Shields <simon@lineageos.org>
6 // Copyright (C) 2020 Samsung Electronics Co., Ltd.
7 
8 #include <linux/clk.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/mfd/wm8994/registers.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_device.h>
14 #include <linux/of_gpio.h>
15 #include <linux/regulator/consumer.h>
16 #include <sound/jack.h>
17 #include <sound/soc.h>
18 #include <sound/soc-dapm.h>
19 
20 #include "i2s.h"
21 #include "../codecs/wm8994.h"
22 
23 /*
24  * The MCLK1 clock source is XCLKOUT with its mux set to the external fixed rate
25  * oscillator (XXTI).
26  */
27 #define MCLK1_RATE 24000000U
28 #define MCLK2_RATE 32768U
29 #define DEFAULT_FLL1_RATE 11289600U
30 
31 struct midas_priv {
32 	struct regulator *reg_mic_bias;
33 	struct regulator *reg_submic_bias;
34 	struct gpio_desc *gpio_fm_sel;
35 	struct gpio_desc *gpio_lineout_sel;
36 	unsigned int fll1_rate;
37 
38 	struct snd_soc_jack headset_jack;
39 };
40 
41 static struct snd_soc_jack_pin headset_jack_pins[] = {
42 	{
43 		.pin = "Headphone",
44 		.mask = SND_JACK_HEADPHONE,
45 	},
46 	{
47 		.pin = "Headset Mic",
48 		.mask = SND_JACK_MICROPHONE,
49 	},
50 };
51 
midas_start_fll1(struct snd_soc_pcm_runtime * rtd,unsigned int rate)52 static int midas_start_fll1(struct snd_soc_pcm_runtime *rtd, unsigned int rate)
53 {
54 	struct snd_soc_card *card = rtd->card;
55 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
56 	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
57 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
58 	int ret;
59 
60 	if (!rate)
61 		rate = priv->fll1_rate;
62 	/*
63 	 * If no new rate is requested, set FLL1 to a sane default for jack
64 	 * detection.
65 	 */
66 	if (!rate)
67 		rate = DEFAULT_FLL1_RATE;
68 
69 	if (rate != priv->fll1_rate && priv->fll1_rate) {
70 		/* while reconfiguring, switch to MCLK2 for SYSCLK */
71 		ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
72 					     MCLK2_RATE, SND_SOC_CLOCK_IN);
73 		if (ret < 0) {
74 			dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);
75 			return ret;
76 		}
77 	}
78 
79 	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
80 				  MCLK1_RATE, rate);
81 	if (ret < 0) {
82 		dev_err(card->dev, "Failed to set FLL1 rate: %d\n", ret);
83 		return ret;
84 	}
85 	priv->fll1_rate = rate;
86 
87 	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_FLL1,
88 				     priv->fll1_rate, SND_SOC_CLOCK_IN);
89 	if (ret < 0) {
90 		dev_err(card->dev, "Failed to set SYSCLK source: %d\n", ret);
91 		return ret;
92 	}
93 
94 	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, 0,
95 				     SAMSUNG_I2S_OPCLK_PCLK);
96 	if (ret < 0) {
97 		dev_err(card->dev, "Failed to set OPCLK source: %d\n", ret);
98 		return ret;
99 	}
100 
101 	return 0;
102 }
103 
midas_stop_fll1(struct snd_soc_pcm_runtime * rtd)104 static int midas_stop_fll1(struct snd_soc_pcm_runtime *rtd)
105 {
106 	struct snd_soc_card *card = rtd->card;
107 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
108 	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
109 	int ret;
110 
111 	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
112 				     MCLK2_RATE, SND_SOC_CLOCK_IN);
113 	if (ret < 0) {
114 		dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);
115 		return ret;
116 	}
117 
118 	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 0, 0, 0);
119 	if (ret < 0) {
120 		dev_err(card->dev, "Unable to stop FLL1: %d\n", ret);
121 		return ret;
122 	}
123 
124 	priv->fll1_rate = 0;
125 
126 	return 0;
127 }
128 
midas_aif1_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)129 static int midas_aif1_hw_params(struct snd_pcm_substream *substream,
130 				struct snd_pcm_hw_params *params)
131 {
132 	struct snd_soc_pcm_runtime *rtd	= substream->private_data;
133 	unsigned int pll_out;
134 
135 	/* AIF1CLK should be at least 3MHz for "optimal performance" */
136 	if (params_rate(params) == 8000 || params_rate(params) == 11025)
137 		pll_out = params_rate(params) * 512;
138 	else
139 		pll_out = params_rate(params) * 256;
140 
141 	return midas_start_fll1(rtd, pll_out);
142 }
143 
144 static const struct snd_soc_ops midas_aif1_ops = {
145 	.hw_params = midas_aif1_hw_params,
146 };
147 
148 /*
149  * We only have a single external speaker, so mix stereo data
150  * to a single mono stream.
151  */
midas_ext_spkmode(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)152 static int midas_ext_spkmode(struct snd_soc_dapm_widget *w,
153 			     struct snd_kcontrol *kcontrol, int event)
154 {
155 	struct snd_soc_component *codec = snd_soc_dapm_to_component(w->dapm);
156 	int ret = 0;
157 
158 	switch (event) {
159 	case SND_SOC_DAPM_PRE_PMU:
160 		ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,
161 				  WM8994_SPKMIXR_TO_SPKOUTL_MASK,
162 				  WM8994_SPKMIXR_TO_SPKOUTL);
163 		break;
164 	case SND_SOC_DAPM_POST_PMD:
165 		ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,
166 				  WM8994_SPKMIXR_TO_SPKOUTL_MASK,
167 				  0);
168 		break;
169 	}
170 
171 	return ret;
172 }
173 
midas_mic_bias(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)174 static int midas_mic_bias(struct snd_soc_dapm_widget *w,
175 			  struct snd_kcontrol *kcontrol, int event)
176 {
177 	struct snd_soc_card *card = w->dapm->card;
178 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
179 
180 	switch (event) {
181 	case SND_SOC_DAPM_PRE_PMU:
182 		return regulator_enable(priv->reg_mic_bias);
183 	case SND_SOC_DAPM_POST_PMD:
184 		return regulator_disable(priv->reg_mic_bias);
185 	}
186 
187 	return 0;
188 }
189 
midas_submic_bias(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)190 static int midas_submic_bias(struct snd_soc_dapm_widget *w,
191 			     struct snd_kcontrol *kcontrol, int event)
192 {
193 	struct snd_soc_card *card = w->dapm->card;
194 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
195 
196 	switch (event) {
197 	case SND_SOC_DAPM_PRE_PMU:
198 		return regulator_enable(priv->reg_submic_bias);
199 	case SND_SOC_DAPM_POST_PMD:
200 		return regulator_disable(priv->reg_submic_bias);
201 	}
202 
203 	return 0;
204 }
205 
midas_fm_set(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)206 static int midas_fm_set(struct snd_soc_dapm_widget *w,
207 			struct snd_kcontrol *kcontrol, int event)
208 {
209 	struct snd_soc_card *card = w->dapm->card;
210 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
211 
212 	if (!priv->gpio_fm_sel)
213 		return 0;
214 
215 	switch (event) {
216 	case SND_SOC_DAPM_PRE_PMU:
217 		gpiod_set_value_cansleep(priv->gpio_fm_sel, 1);
218 		break;
219 	case SND_SOC_DAPM_POST_PMD:
220 		gpiod_set_value_cansleep(priv->gpio_fm_sel, 0);
221 		break;
222 	}
223 
224 	return 0;
225 }
226 
midas_line_set(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)227 static int midas_line_set(struct snd_soc_dapm_widget *w,
228 			  struct snd_kcontrol *kcontrol, int event)
229 {
230 	struct snd_soc_card *card = w->dapm->card;
231 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
232 
233 	if (!priv->gpio_lineout_sel)
234 		return 0;
235 
236 	switch (event) {
237 	case SND_SOC_DAPM_PRE_PMU:
238 		gpiod_set_value_cansleep(priv->gpio_lineout_sel, 1);
239 		break;
240 	case SND_SOC_DAPM_POST_PMD:
241 		gpiod_set_value_cansleep(priv->gpio_lineout_sel, 0);
242 		break;
243 	}
244 
245 	return 0;
246 }
247 
248 static const struct snd_kcontrol_new midas_controls[] = {
249 	SOC_DAPM_PIN_SWITCH("HP"),
250 
251 	SOC_DAPM_PIN_SWITCH("SPK"),
252 	SOC_DAPM_PIN_SWITCH("RCV"),
253 
254 	SOC_DAPM_PIN_SWITCH("LINE"),
255 	SOC_DAPM_PIN_SWITCH("HDMI"),
256 
257 	SOC_DAPM_PIN_SWITCH("Main Mic"),
258 	SOC_DAPM_PIN_SWITCH("Sub Mic"),
259 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
260 
261 	SOC_DAPM_PIN_SWITCH("FM In"),
262 };
263 
264 static const struct snd_soc_dapm_widget midas_dapm_widgets[] = {
265 	SND_SOC_DAPM_HP("HP", NULL),
266 
267 	SND_SOC_DAPM_SPK("SPK", midas_ext_spkmode),
268 	SND_SOC_DAPM_SPK("RCV", NULL),
269 
270 	/* FIXME: toggle MAX77693 on i9300/i9305 */
271 	SND_SOC_DAPM_LINE("LINE", midas_line_set),
272 	SND_SOC_DAPM_LINE("HDMI", NULL),
273 	SND_SOC_DAPM_LINE("FM In", midas_fm_set),
274 
275 	SND_SOC_DAPM_HP("Headphone", NULL),
276 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
277 	SND_SOC_DAPM_MIC("Main Mic", midas_mic_bias),
278 	SND_SOC_DAPM_MIC("Sub Mic", midas_submic_bias),
279 };
280 
midas_set_bias_level(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)281 static int midas_set_bias_level(struct snd_soc_card *card,
282 				struct snd_soc_dapm_context *dapm,
283 				enum snd_soc_bias_level level)
284 {
285 	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,
286 						  &card->dai_link[0]);
287 	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
288 
289 	if (dapm->dev != aif1_dai->dev)
290 		return 0;
291 
292 	switch (level) {
293 	case SND_SOC_BIAS_STANDBY:
294 		return midas_stop_fll1(rtd);
295 	case SND_SOC_BIAS_PREPARE:
296 		return midas_start_fll1(rtd, 0);
297 	default:
298 		break;
299 	}
300 
301 	return 0;
302 }
303 
midas_late_probe(struct snd_soc_card * card)304 static int midas_late_probe(struct snd_soc_card *card)
305 {
306 	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,
307 							&card->dai_link[0]);
308 	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);
309 	struct midas_priv *priv = snd_soc_card_get_drvdata(card);
310 	int ret;
311 
312 	/* Use MCLK2 as SYSCLK for boot */
313 	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, MCLK2_RATE,
314 				     SND_SOC_CLOCK_IN);
315 	if (ret < 0) {
316 		dev_err(aif1_dai->dev, "Failed to switch to MCLK2: %d\n", ret);
317 		return ret;
318 	}
319 
320 	ret = snd_soc_card_jack_new_pins(card, "Headset",
321 					 SND_JACK_HEADSET | SND_JACK_MECHANICAL |
322 					 SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2 |
323 					 SND_JACK_BTN_3 | SND_JACK_BTN_4 | SND_JACK_BTN_5,
324 					 &priv->headset_jack,
325 					 headset_jack_pins,
326 					 ARRAY_SIZE(headset_jack_pins));
327 	if (ret)
328 		return ret;
329 
330 	wm8958_mic_detect(aif1_dai->component, &priv->headset_jack,
331 			  NULL, NULL, NULL, NULL);
332 	return 0;
333 }
334 
335 static struct snd_soc_dai_driver midas_ext_dai[] = {
336 	{
337 		.name = "Voice call",
338 		.playback = {
339 			.channels_min = 1,
340 			.channels_max = 2,
341 			.rate_min = 8000,
342 			.rate_max = 16000,
343 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
344 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
345 		},
346 		.capture = {
347 			.channels_min = 1,
348 			.channels_max = 2,
349 			.rate_min = 8000,
350 			.rate_max = 16000,
351 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
352 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
353 		},
354 	},
355 	{
356 		.name = "Bluetooth",
357 		.playback = {
358 			.channels_min = 1,
359 			.channels_max = 2,
360 			.rate_min = 8000,
361 			.rate_max = 16000,
362 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
363 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
364 		},
365 		.capture = {
366 			.channels_min = 1,
367 			.channels_max = 2,
368 			.rate_min = 8000,
369 			.rate_max = 16000,
370 			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
371 			.formats = SNDRV_PCM_FMTBIT_S16_LE,
372 		},
373 	},
374 };
375 
376 static const struct snd_soc_component_driver midas_component = {
377 	.name	= "midas-audio",
378 };
379 
380 SND_SOC_DAILINK_DEFS(wm1811_hifi,
381 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
382 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
383 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
384 
385 SND_SOC_DAILINK_DEFS(wm1811_voice,
386 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
387 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif2")),
388 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
389 
390 SND_SOC_DAILINK_DEFS(wm1811_bt,
391 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
392 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif3")),
393 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
394 
395 static struct snd_soc_dai_link midas_dai[] = {
396 	{
397 		.name = "WM8994 AIF1",
398 		.stream_name = "HiFi Primary",
399 		.ops = &midas_aif1_ops,
400 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
401 			SND_SOC_DAIFMT_CBM_CFM,
402 		SND_SOC_DAILINK_REG(wm1811_hifi),
403 	}, {
404 		.name = "WM1811 Voice",
405 		.stream_name = "Voice call",
406 		.ignore_suspend = 1,
407 		SND_SOC_DAILINK_REG(wm1811_voice),
408 	}, {
409 		.name = "WM1811 BT",
410 		.stream_name = "Bluetooth",
411 		.ignore_suspend = 1,
412 		SND_SOC_DAILINK_REG(wm1811_bt),
413 	},
414 };
415 
416 static struct snd_soc_card midas_card = {
417 	.name = "Midas WM1811",
418 	.owner = THIS_MODULE,
419 
420 	.dai_link = midas_dai,
421 	.num_links = ARRAY_SIZE(midas_dai),
422 	.controls = midas_controls,
423 	.num_controls = ARRAY_SIZE(midas_controls),
424 	.dapm_widgets = midas_dapm_widgets,
425 	.num_dapm_widgets = ARRAY_SIZE(midas_dapm_widgets),
426 
427 	.set_bias_level = midas_set_bias_level,
428 	.late_probe = midas_late_probe,
429 };
430 
midas_probe(struct platform_device * pdev)431 static int midas_probe(struct platform_device *pdev)
432 {
433 	struct device_node *cpu_dai_node = NULL, *codec_dai_node = NULL;
434 	struct device_node *cpu = NULL, *codec = NULL;
435 	struct snd_soc_card *card = &midas_card;
436 	struct device *dev = &pdev->dev;
437 	static struct snd_soc_dai_link *dai_link;
438 	struct midas_priv *priv;
439 	int ret, i;
440 
441 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
442 	if (!priv)
443 		return -ENOMEM;
444 
445 	snd_soc_card_set_drvdata(card, priv);
446 	card->dev = dev;
447 
448 	priv->reg_mic_bias = devm_regulator_get(dev, "mic-bias");
449 	if (IS_ERR(priv->reg_mic_bias)) {
450 		dev_err(dev, "Failed to get mic bias regulator\n");
451 		return PTR_ERR(priv->reg_mic_bias);
452 	}
453 
454 	priv->reg_submic_bias = devm_regulator_get(dev, "submic-bias");
455 	if (IS_ERR(priv->reg_submic_bias)) {
456 		dev_err(dev, "Failed to get submic bias regulator\n");
457 		return PTR_ERR(priv->reg_submic_bias);
458 	}
459 
460 	priv->gpio_fm_sel = devm_gpiod_get_optional(dev, "fm-sel", GPIOD_OUT_HIGH);
461 	if (IS_ERR(priv->gpio_fm_sel)) {
462 		dev_err(dev, "Failed to get FM selection GPIO\n");
463 		return PTR_ERR(priv->gpio_fm_sel);
464 	}
465 
466 	priv->gpio_lineout_sel = devm_gpiod_get_optional(dev, "lineout-sel",
467 						    GPIOD_OUT_HIGH);
468 	if (IS_ERR(priv->gpio_lineout_sel)) {
469 		dev_err(dev, "Failed to get line out selection GPIO\n");
470 		return PTR_ERR(priv->gpio_lineout_sel);
471 	}
472 
473 	ret = snd_soc_of_parse_card_name(card, "model");
474 	if (ret < 0) {
475 		dev_err(dev, "Card name is not specified\n");
476 		return ret;
477 	}
478 
479 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
480 	if (ret < 0) {
481 		/* Backwards compatible way */
482 		ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");
483 		if (ret < 0) {
484 			dev_err(dev, "Audio routing invalid/unspecified\n");
485 			return ret;
486 		}
487 	}
488 
489 	cpu = of_get_child_by_name(dev->of_node, "cpu");
490 	if (!cpu)
491 		return -EINVAL;
492 
493 	codec = of_get_child_by_name(dev->of_node, "codec");
494 	if (!codec) {
495 		of_node_put(cpu);
496 		return -EINVAL;
497 	}
498 
499 	cpu_dai_node = of_parse_phandle(cpu, "sound-dai", 0);
500 	of_node_put(cpu);
501 	if (!cpu_dai_node) {
502 		dev_err(dev, "parsing cpu/sound-dai failed\n");
503 		of_node_put(codec);
504 		return -EINVAL;
505 	}
506 
507 	codec_dai_node = of_parse_phandle(codec, "sound-dai", 0);
508 	of_node_put(codec);
509 	if (!codec_dai_node) {
510 		dev_err(dev, "audio-codec property invalid/missing\n");
511 		ret = -EINVAL;
512 		goto put_cpu_dai_node;
513 	}
514 
515 	for_each_card_prelinks(card, i, dai_link) {
516 		dai_link->codecs->of_node = codec_dai_node;
517 		dai_link->cpus->of_node = cpu_dai_node;
518 		dai_link->platforms->of_node = cpu_dai_node;
519 	}
520 
521 	ret = devm_snd_soc_register_component(dev, &midas_component,
522 			midas_ext_dai, ARRAY_SIZE(midas_ext_dai));
523 	if (ret < 0) {
524 		dev_err(dev, "Failed to register component: %d\n", ret);
525 		goto put_codec_dai_node;
526 	}
527 
528 	ret = devm_snd_soc_register_card(dev, card);
529 	if (ret < 0) {
530 		dev_err(dev, "Failed to register card: %d\n", ret);
531 		goto put_codec_dai_node;
532 	}
533 
534 	return 0;
535 
536 put_codec_dai_node:
537 	of_node_put(codec_dai_node);
538 put_cpu_dai_node:
539 	of_node_put(cpu_dai_node);
540 	return ret;
541 }
542 
543 static const struct of_device_id midas_of_match[] = {
544 	{ .compatible = "samsung,midas-audio" },
545 	{ },
546 };
547 MODULE_DEVICE_TABLE(of, midas_of_match);
548 
549 static struct platform_driver midas_driver = {
550 	.driver = {
551 		.name = "midas-audio",
552 		.of_match_table = midas_of_match,
553 		.pm = &snd_soc_pm_ops,
554 	},
555 	.probe = midas_probe,
556 };
557 module_platform_driver(midas_driver);
558 
559 MODULE_AUTHOR("Simon Shields <simon@lineageos.org>");
560 MODULE_DESCRIPTION("ASoC support for Midas");
561 MODULE_LICENSE("GPL v2");
562