1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ASoC machine driver for Intel Broadwell platforms with RT5677 codec
4  *
5  * Copyright (c) 2014, The Chromium OS Authors.  All rights reserved.
6  */
7 
8 #include <linux/acpi.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/delay.h>
13 #include <sound/core.h>
14 #include <sound/pcm.h>
15 #include <sound/soc.h>
16 #include <sound/pcm_params.h>
17 #include <sound/jack.h>
18 #include <sound/soc-acpi.h>
19 
20 #include "../../codecs/rt5677.h"
21 
22 struct bdw_rt5677_priv {
23 	struct gpio_desc *gpio_hp_en;
24 	struct snd_soc_component *component;
25 };
26 
bdw_rt5677_event_hp(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)27 static int bdw_rt5677_event_hp(struct snd_soc_dapm_widget *w,
28 			struct snd_kcontrol *k, int event)
29 {
30 	struct snd_soc_dapm_context *dapm = w->dapm;
31 	struct snd_soc_card *card = dapm->card;
32 	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
33 
34 	if (SND_SOC_DAPM_EVENT_ON(event))
35 		msleep(70);
36 
37 	gpiod_set_value_cansleep(bdw_rt5677->gpio_hp_en,
38 		SND_SOC_DAPM_EVENT_ON(event));
39 
40 	return 0;
41 }
42 
43 static const struct snd_soc_dapm_widget bdw_rt5677_widgets[] = {
44 	SND_SOC_DAPM_HP("Headphone", bdw_rt5677_event_hp),
45 	SND_SOC_DAPM_SPK("Speaker", NULL),
46 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
47 	SND_SOC_DAPM_MIC("Local DMICs", NULL),
48 	SND_SOC_DAPM_MIC("Remote DMICs", NULL),
49 };
50 
51 static const struct snd_soc_dapm_route bdw_rt5677_map[] = {
52 	/* Speakers */
53 	{"Speaker", NULL, "PDM1L"},
54 	{"Speaker", NULL, "PDM1R"},
55 
56 	/* Headset jack connectors */
57 	{"Headphone", NULL, "LOUT1"},
58 	{"Headphone", NULL, "LOUT2"},
59 	{"IN1P", NULL, "Headset Mic"},
60 	{"IN1N", NULL, "Headset Mic"},
61 
62 	/* Digital MICs
63 	 * Local DMICs: the two DMICs on the mainboard
64 	 * Remote DMICs: the two DMICs on the camera module
65 	 */
66 	{"DMIC L1", NULL, "Remote DMICs"},
67 	{"DMIC R1", NULL, "Remote DMICs"},
68 	{"DMIC L2", NULL, "Local DMICs"},
69 	{"DMIC R2", NULL, "Local DMICs"},
70 
71 	/* CODEC BE connections */
72 	{"SSP0 CODEC IN", NULL, "AIF1 Capture"},
73 	{"AIF1 Playback", NULL, "SSP0 CODEC OUT"},
74 	{"DSP Capture", NULL, "DSP Buffer"},
75 
76 	/* DSP Clock Connections */
77 	{ "DSP Buffer", NULL, "SSP0 CODEC IN" },
78 	{ "SSP0 CODEC IN", NULL, "DSPTX" },
79 };
80 
81 static const struct snd_kcontrol_new bdw_rt5677_controls[] = {
82 	SOC_DAPM_PIN_SWITCH("Speaker"),
83 	SOC_DAPM_PIN_SWITCH("Headphone"),
84 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
85 	SOC_DAPM_PIN_SWITCH("Local DMICs"),
86 	SOC_DAPM_PIN_SWITCH("Remote DMICs"),
87 };
88 
89 
90 static struct snd_soc_jack headphone_jack;
91 static struct snd_soc_jack mic_jack;
92 
93 static struct snd_soc_jack_pin headphone_jack_pin = {
94 	.pin	= "Headphone",
95 	.mask	= SND_JACK_HEADPHONE,
96 };
97 
98 static struct snd_soc_jack_pin mic_jack_pin = {
99 	.pin	= "Headset Mic",
100 	.mask	= SND_JACK_MICROPHONE,
101 };
102 
103 static struct snd_soc_jack_gpio headphone_jack_gpio = {
104 	.name			= "plug-det",
105 	.report			= SND_JACK_HEADPHONE,
106 	.debounce_time		= 200,
107 };
108 
109 static struct snd_soc_jack_gpio mic_jack_gpio = {
110 	.name			= "mic-present",
111 	.report			= SND_JACK_MICROPHONE,
112 	.debounce_time		= 200,
113 	.invert			= 1,
114 };
115 
116 /* GPIO indexes defined by ACPI */
117 enum {
118 	RT5677_GPIO_PLUG_DET		= 0,
119 	RT5677_GPIO_MIC_PRESENT_L	= 1,
120 	RT5677_GPIO_HOTWORD_DET_L	= 2,
121 	RT5677_GPIO_DSP_INT		= 3,
122 	RT5677_GPIO_HP_AMP_SHDN_L	= 4,
123 };
124 
125 static const struct acpi_gpio_params plug_det_gpio = { RT5677_GPIO_PLUG_DET, 0, false };
126 static const struct acpi_gpio_params mic_present_gpio = { RT5677_GPIO_MIC_PRESENT_L, 0, false };
127 static const struct acpi_gpio_params headphone_enable_gpio = { RT5677_GPIO_HP_AMP_SHDN_L, 0, false };
128 
129 static const struct acpi_gpio_mapping bdw_rt5677_gpios[] = {
130 	{ "plug-det-gpios", &plug_det_gpio, 1 },
131 	{ "mic-present-gpios", &mic_present_gpio, 1 },
132 	{ "headphone-enable-gpios", &headphone_enable_gpio, 1 },
133 	{ NULL },
134 };
135 
broadwell_ssp0_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)136 static int broadwell_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
137 			struct snd_pcm_hw_params *params)
138 {
139 	struct snd_interval *rate = hw_param_interval(params,
140 						      SNDRV_PCM_HW_PARAM_RATE);
141 	struct snd_interval *chan = hw_param_interval(params,
142 						      SNDRV_PCM_HW_PARAM_CHANNELS);
143 
144 	/* The ADSP will convert the FE rate to 48k, stereo */
145 	rate->min = rate->max = 48000;
146 	chan->min = chan->max = 2;
147 
148 	/* set SSP0 to 16 bit */
149 	params_set_format(params, SNDRV_PCM_FORMAT_S16_LE);
150 	return 0;
151 }
152 
bdw_rt5677_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)153 static int bdw_rt5677_hw_params(struct snd_pcm_substream *substream,
154 	struct snd_pcm_hw_params *params)
155 {
156 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
157 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
158 	int ret;
159 
160 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_MCLK, 24576000,
161 		SND_SOC_CLOCK_IN);
162 	if (ret < 0) {
163 		dev_err(rtd->dev, "can't set codec sysclk configuration\n");
164 		return ret;
165 	}
166 
167 	return ret;
168 }
169 
bdw_rt5677_dsp_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)170 static int bdw_rt5677_dsp_hw_params(struct snd_pcm_substream *substream,
171 	struct snd_pcm_hw_params *params)
172 {
173 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
174 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
175 	int ret;
176 
177 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_PLL1, 24576000,
178 		SND_SOC_CLOCK_IN);
179 	if (ret < 0) {
180 		dev_err(rtd->dev, "can't set codec sysclk configuration\n");
181 		return ret;
182 	}
183 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5677_PLL1_S_MCLK,
184 		24000000, 24576000);
185 	if (ret < 0) {
186 		dev_err(rtd->dev, "can't set codec pll configuration\n");
187 		return ret;
188 	}
189 
190 	return 0;
191 }
192 
193 static const struct snd_soc_ops bdw_rt5677_ops = {
194 	.hw_params = bdw_rt5677_hw_params,
195 };
196 
197 static const struct snd_soc_ops bdw_rt5677_dsp_ops = {
198 	.hw_params = bdw_rt5677_dsp_hw_params,
199 };
200 
201 static const unsigned int channels[] = {
202 	2,
203 };
204 
205 static const struct snd_pcm_hw_constraint_list constraints_channels = {
206 	.count = ARRAY_SIZE(channels),
207 	.list = channels,
208 	.mask = 0,
209 };
210 
bdw_rt5677_fe_startup(struct snd_pcm_substream * substream)211 static int bdw_rt5677_fe_startup(struct snd_pcm_substream *substream)
212 {
213 	struct snd_pcm_runtime *runtime = substream->runtime;
214 
215 	/* Board supports stereo configuration only */
216 	runtime->hw.channels_max = 2;
217 	return snd_pcm_hw_constraint_list(runtime, 0,
218 					  SNDRV_PCM_HW_PARAM_CHANNELS,
219 					  &constraints_channels);
220 }
221 
222 static const struct snd_soc_ops bdw_rt5677_fe_ops = {
223 	.startup = bdw_rt5677_fe_startup,
224 };
225 
bdw_rt5677_init(struct snd_soc_pcm_runtime * rtd)226 static int bdw_rt5677_init(struct snd_soc_pcm_runtime *rtd)
227 {
228 	struct bdw_rt5677_priv *bdw_rt5677 =
229 			snd_soc_card_get_drvdata(rtd->card);
230 	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
231 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
232 	int ret;
233 
234 	ret = devm_acpi_dev_add_driver_gpios(component->dev, bdw_rt5677_gpios);
235 	if (ret)
236 		dev_warn(component->dev, "Failed to add driver gpios\n");
237 
238 	/* Enable codec ASRC function for Stereo DAC/Stereo1 ADC/DMIC/I2S1.
239 	 * The ASRC clock source is clk_i2s1_asrc.
240 	 */
241 	rt5677_sel_asrc_clk_src(component, RT5677_DA_STEREO_FILTER |
242 			RT5677_AD_STEREO1_FILTER | RT5677_I2S1_SOURCE,
243 			RT5677_CLK_SEL_I2S1_ASRC);
244 	/* Enable codec ASRC function for Mono ADC L.
245 	 * The ASRC clock source is clk_sys2_asrc.
246 	 */
247 	rt5677_sel_asrc_clk_src(component, RT5677_AD_MONO_L_FILTER,
248 			RT5677_CLK_SEL_SYS2);
249 
250 	/* Request rt5677 GPIO for headphone amp control */
251 	bdw_rt5677->gpio_hp_en = gpiod_get(component->dev, "headphone-enable",
252 					   GPIOD_OUT_LOW);
253 	if (IS_ERR(bdw_rt5677->gpio_hp_en)) {
254 		dev_err(component->dev, "Can't find HP_AMP_SHDN_L gpio\n");
255 		return PTR_ERR(bdw_rt5677->gpio_hp_en);
256 	}
257 
258 	/* Create and initialize headphone jack */
259 	if (!snd_soc_card_jack_new_pins(rtd->card, "Headphone Jack",
260 			SND_JACK_HEADPHONE, &headphone_jack,
261 			&headphone_jack_pin, 1)) {
262 		headphone_jack_gpio.gpiod_dev = component->dev;
263 		if (snd_soc_jack_add_gpios(&headphone_jack, 1,
264 				&headphone_jack_gpio))
265 			dev_err(component->dev, "Can't add headphone jack gpio\n");
266 	} else {
267 		dev_err(component->dev, "Can't create headphone jack\n");
268 	}
269 
270 	/* Create and initialize mic jack */
271 	if (!snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
272 			SND_JACK_MICROPHONE, &mic_jack,
273 			&mic_jack_pin, 1)) {
274 		mic_jack_gpio.gpiod_dev = component->dev;
275 		if (snd_soc_jack_add_gpios(&mic_jack, 1, &mic_jack_gpio))
276 			dev_err(component->dev, "Can't add mic jack gpio\n");
277 	} else {
278 		dev_err(component->dev, "Can't create mic jack\n");
279 	}
280 	bdw_rt5677->component = component;
281 
282 	snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
283 	return 0;
284 }
285 
bdw_rt5677_exit(struct snd_soc_pcm_runtime * rtd)286 static void bdw_rt5677_exit(struct snd_soc_pcm_runtime *rtd)
287 {
288 	struct bdw_rt5677_priv *bdw_rt5677 =
289 			snd_soc_card_get_drvdata(rtd->card);
290 
291 	/*
292 	 * The .exit() can be reached without going through the .init()
293 	 * so explicitly test if the gpiod is valid
294 	 */
295 	if (!IS_ERR_OR_NULL(bdw_rt5677->gpio_hp_en))
296 		gpiod_put(bdw_rt5677->gpio_hp_en);
297 }
298 
299 /* broadwell digital audio interface glue - connects codec <--> CPU */
300 SND_SOC_DAILINK_DEF(dummy,
301 	DAILINK_COMP_ARRAY(COMP_DUMMY()));
302 
303 SND_SOC_DAILINK_DEF(fe,
304 	DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));
305 
306 SND_SOC_DAILINK_DEF(platform,
307 	DAILINK_COMP_ARRAY(COMP_PLATFORM("haswell-pcm-audio")));
308 
309 SND_SOC_DAILINK_DEF(be,
310 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-RT5677CE:00", "rt5677-aif1")));
311 
312 SND_SOC_DAILINK_DEF(ssp0_port,
313 	    DAILINK_COMP_ARRAY(COMP_CPU("ssp0-port")));
314 
315 /* Wake on voice interface */
316 SND_SOC_DAILINK_DEFS(dsp,
317 	DAILINK_COMP_ARRAY(COMP_CPU("spi-RT5677AA:00")),
318 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-RT5677CE:00", "rt5677-dspbuffer")),
319 	DAILINK_COMP_ARRAY(COMP_PLATFORM("spi-RT5677AA:00")));
320 
321 static struct snd_soc_dai_link bdw_rt5677_dais[] = {
322 	/* Front End DAI links */
323 	{
324 		.name = "System PCM",
325 		.stream_name = "System Playback/Capture",
326 		.nonatomic = 1,
327 		.dynamic = 1,
328 		.trigger = {
329 			SND_SOC_DPCM_TRIGGER_POST,
330 			SND_SOC_DPCM_TRIGGER_POST
331 		},
332 		.dpcm_capture = 1,
333 		.dpcm_playback = 1,
334 		.ops = &bdw_rt5677_fe_ops,
335 		SND_SOC_DAILINK_REG(fe, dummy, platform),
336 	},
337 
338 	/* Non-DPCM links */
339 	{
340 		.name = "Codec DSP",
341 		.stream_name = "Wake on Voice",
342 		.capture_only = 1,
343 		.ops = &bdw_rt5677_dsp_ops,
344 		SND_SOC_DAILINK_REG(dsp),
345 	},
346 
347 	/* Back End DAI links */
348 	{
349 		/* SSP0 - Codec */
350 		.name = "Codec",
351 		.id = 0,
352 		.nonatomic = 1,
353 		.no_pcm = 1,
354 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
355 			SND_SOC_DAIFMT_CBC_CFC,
356 		.ignore_pmdown_time = 1,
357 		.be_hw_params_fixup = broadwell_ssp0_fixup,
358 		.ops = &bdw_rt5677_ops,
359 		.dpcm_playback = 1,
360 		.dpcm_capture = 1,
361 		.init = bdw_rt5677_init,
362 		.exit = bdw_rt5677_exit,
363 		SND_SOC_DAILINK_REG(ssp0_port, be, platform),
364 	},
365 };
366 
bdw_rt5677_suspend_pre(struct snd_soc_card * card)367 static int bdw_rt5677_suspend_pre(struct snd_soc_card *card)
368 {
369 	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
370 	struct snd_soc_dapm_context *dapm;
371 
372 	if (bdw_rt5677->component) {
373 		dapm = snd_soc_component_get_dapm(bdw_rt5677->component);
374 		snd_soc_dapm_disable_pin(dapm, "MICBIAS1");
375 	}
376 	return 0;
377 }
378 
bdw_rt5677_resume_post(struct snd_soc_card * card)379 static int bdw_rt5677_resume_post(struct snd_soc_card *card)
380 {
381 	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
382 	struct snd_soc_dapm_context *dapm;
383 
384 	if (bdw_rt5677->component) {
385 		dapm = snd_soc_component_get_dapm(bdw_rt5677->component);
386 		snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
387 	}
388 	return 0;
389 }
390 
391 /* use space before codec name to simplify card ID, and simplify driver name */
392 #define SOF_CARD_NAME "bdw rt5677" /* card name will be 'sof-bdw rt5677' */
393 #define SOF_DRIVER_NAME "SOF"
394 
395 #define CARD_NAME "bdw-rt5677"
396 #define DRIVER_NAME NULL /* card name will be used for driver name */
397 
398 /* ASoC machine driver for Broadwell DSP + RT5677 */
399 static struct snd_soc_card bdw_rt5677_card = {
400 	.name = CARD_NAME,
401 	.driver_name = DRIVER_NAME,
402 	.owner = THIS_MODULE,
403 	.dai_link = bdw_rt5677_dais,
404 	.num_links = ARRAY_SIZE(bdw_rt5677_dais),
405 	.dapm_widgets = bdw_rt5677_widgets,
406 	.num_dapm_widgets = ARRAY_SIZE(bdw_rt5677_widgets),
407 	.dapm_routes = bdw_rt5677_map,
408 	.num_dapm_routes = ARRAY_SIZE(bdw_rt5677_map),
409 	.controls = bdw_rt5677_controls,
410 	.num_controls = ARRAY_SIZE(bdw_rt5677_controls),
411 	.fully_routed = true,
412 	.suspend_pre = bdw_rt5677_suspend_pre,
413 	.resume_post = bdw_rt5677_resume_post,
414 };
415 
bdw_rt5677_probe(struct platform_device * pdev)416 static int bdw_rt5677_probe(struct platform_device *pdev)
417 {
418 	struct bdw_rt5677_priv *bdw_rt5677;
419 	struct snd_soc_acpi_mach *mach;
420 	int ret;
421 
422 	bdw_rt5677_card.dev = &pdev->dev;
423 
424 	/* Allocate driver private struct */
425 	bdw_rt5677 = devm_kzalloc(&pdev->dev, sizeof(struct bdw_rt5677_priv),
426 		GFP_KERNEL);
427 	if (!bdw_rt5677)
428 		return -ENOMEM;
429 
430 	/* override platform name, if required */
431 	mach = pdev->dev.platform_data;
432 	ret = snd_soc_fixup_dai_links_platform_name(&bdw_rt5677_card,
433 						    mach->mach_params.platform);
434 	if (ret)
435 		return ret;
436 
437 	/* set card and driver name */
438 	if (snd_soc_acpi_sof_parent(&pdev->dev)) {
439 		bdw_rt5677_card.name = SOF_CARD_NAME;
440 		bdw_rt5677_card.driver_name = SOF_DRIVER_NAME;
441 	} else {
442 		bdw_rt5677_card.name = CARD_NAME;
443 		bdw_rt5677_card.driver_name = DRIVER_NAME;
444 	}
445 
446 	snd_soc_card_set_drvdata(&bdw_rt5677_card, bdw_rt5677);
447 
448 	return devm_snd_soc_register_card(&pdev->dev, &bdw_rt5677_card);
449 }
450 
451 static struct platform_driver bdw_rt5677_audio = {
452 	.probe = bdw_rt5677_probe,
453 	.driver = {
454 		.name = "bdw-rt5677",
455 		.pm = &snd_soc_pm_ops
456 	},
457 };
458 
459 module_platform_driver(bdw_rt5677_audio)
460 
461 /* Module information */
462 MODULE_AUTHOR("Ben Zhang");
463 MODULE_DESCRIPTION("Intel Broadwell RT5677 machine driver");
464 MODULE_LICENSE("GPL v2");
465 MODULE_ALIAS("platform:bdw-rt5677");
466