1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
4  *                     Cherrytrail and Braswell, with RT5672 codec.
5  *
6  *  Copyright (C) 2014 Intel Corp
7  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
8  *          Mengdong Lin <mengdong.lin@intel.com>
9  */
10 
11 #include <linux/gpio/consumer.h>
12 #include <linux/input.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/slab.h>
16 #include <linux/clk.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20 #include <sound/jack.h>
21 #include <sound/soc-acpi.h>
22 #include "../../codecs/rt5670.h"
23 #include "../atom/sst-atom-controls.h"
24 #include "../common/soc-intel-quirks.h"
25 
26 
27 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
28 #define CHT_PLAT_CLK_3_HZ	19200000
29 #define CHT_CODEC_DAI	"rt5670-aif1"
30 
31 struct cht_mc_private {
32 	struct snd_soc_jack headset;
33 	char codec_name[SND_ACPI_I2C_ID_LEN];
34 	struct clk *mclk;
35 	bool use_ssp0;
36 };
37 
38 /* Headset jack detection DAPM pins */
39 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
40 	{
41 		.pin = "Headset Mic",
42 		.mask = SND_JACK_MICROPHONE,
43 	},
44 	{
45 		.pin = "Headphone",
46 		.mask = SND_JACK_HEADPHONE,
47 	},
48 };
49 
platform_clock_control(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)50 static int platform_clock_control(struct snd_soc_dapm_widget *w,
51 		struct snd_kcontrol *k, int  event)
52 {
53 	struct snd_soc_dapm_context *dapm = w->dapm;
54 	struct snd_soc_card *card = dapm->card;
55 	struct snd_soc_dai *codec_dai;
56 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
57 	int ret;
58 
59 	codec_dai = snd_soc_card_get_codec_dai(card, CHT_CODEC_DAI);
60 	if (!codec_dai) {
61 		dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
62 		return -EIO;
63 	}
64 
65 	if (SND_SOC_DAPM_EVENT_ON(event)) {
66 		if (ctx->mclk) {
67 			ret = clk_prepare_enable(ctx->mclk);
68 			if (ret < 0) {
69 				dev_err(card->dev,
70 					"could not configure MCLK state");
71 				return ret;
72 			}
73 		}
74 
75 		/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
76 		ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
77 				CHT_PLAT_CLK_3_HZ, 48000 * 512);
78 		if (ret < 0) {
79 			dev_err(card->dev, "can't set codec pll: %d\n", ret);
80 			return ret;
81 		}
82 
83 		/* set codec sysclk source to PLL */
84 		ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
85 			48000 * 512, SND_SOC_CLOCK_IN);
86 		if (ret < 0) {
87 			dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
88 			return ret;
89 		}
90 	} else {
91 		/* Set codec sysclk source to its internal clock because codec
92 		 * PLL will be off when idle and MCLK will also be off by ACPI
93 		 * when codec is runtime suspended. Codec needs clock for jack
94 		 * detection and button press.
95 		 */
96 		snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
97 				       48000 * 512, SND_SOC_CLOCK_IN);
98 
99 		if (ctx->mclk)
100 			clk_disable_unprepare(ctx->mclk);
101 	}
102 	return 0;
103 }
104 
105 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
106 	SND_SOC_DAPM_HP("Headphone", NULL),
107 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
108 	SND_SOC_DAPM_MIC("Int Mic", NULL),
109 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
110 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
111 			platform_clock_control, SND_SOC_DAPM_PRE_PMU |
112 			SND_SOC_DAPM_POST_PMD),
113 };
114 
115 static const struct snd_soc_dapm_route cht_audio_map[] = {
116 	{"IN1P", NULL, "Headset Mic"},
117 	{"IN1N", NULL, "Headset Mic"},
118 	{"DMIC L1", NULL, "Int Mic"},
119 	{"DMIC R1", NULL, "Int Mic"},
120 	{"Headphone", NULL, "HPOL"},
121 	{"Headphone", NULL, "HPOR"},
122 	{"Ext Spk", NULL, "SPOLP"},
123 	{"Ext Spk", NULL, "SPOLN"},
124 	{"Ext Spk", NULL, "SPORP"},
125 	{"Ext Spk", NULL, "SPORN"},
126 	{"Headphone", NULL, "Platform Clock"},
127 	{"Headset Mic", NULL, "Platform Clock"},
128 	{"Int Mic", NULL, "Platform Clock"},
129 	{"Ext Spk", NULL, "Platform Clock"},
130 };
131 
132 static const struct snd_soc_dapm_route cht_audio_ssp0_map[] = {
133 	{"AIF1 Playback", NULL, "ssp0 Tx"},
134 	{"ssp0 Tx", NULL, "modem_out"},
135 	{"modem_in", NULL, "ssp0 Rx"},
136 	{"ssp0 Rx", NULL, "AIF1 Capture"},
137 };
138 
139 static const struct snd_soc_dapm_route cht_audio_ssp2_map[] = {
140 	{"AIF1 Playback", NULL, "ssp2 Tx"},
141 	{"ssp2 Tx", NULL, "codec_out0"},
142 	{"ssp2 Tx", NULL, "codec_out1"},
143 	{"codec_in0", NULL, "ssp2 Rx"},
144 	{"codec_in1", NULL, "ssp2 Rx"},
145 	{"ssp2 Rx", NULL, "AIF1 Capture"},
146 };
147 
148 static const struct snd_kcontrol_new cht_mc_controls[] = {
149 	SOC_DAPM_PIN_SWITCH("Headphone"),
150 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
151 	SOC_DAPM_PIN_SWITCH("Int Mic"),
152 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
153 };
154 
cht_aif1_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)155 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
156 					struct snd_pcm_hw_params *params)
157 {
158 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
159 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
160 	int ret;
161 
162 	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
163 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
164 				  CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
165 	if (ret < 0) {
166 		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
167 		return ret;
168 	}
169 
170 	/* set codec sysclk source to PLL */
171 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
172 				     params_rate(params) * 512,
173 				     SND_SOC_CLOCK_IN);
174 	if (ret < 0) {
175 		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
176 		return ret;
177 	}
178 	return 0;
179 }
180 
181 static const struct acpi_gpio_params headset_gpios = { 0, 0, false };
182 
183 static const struct acpi_gpio_mapping cht_rt5672_gpios[] = {
184 	{ "headset-gpios", &headset_gpios, 1 },
185 	{},
186 };
187 
cht_codec_init(struct snd_soc_pcm_runtime * runtime)188 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
189 {
190 	int ret;
191 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(runtime, 0);
192 	struct snd_soc_component *component = codec_dai->component;
193 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
194 
195 	if (devm_acpi_dev_add_driver_gpios(component->dev, cht_rt5672_gpios))
196 		dev_warn(runtime->dev, "Unable to add GPIO mapping table\n");
197 
198 	/* Select codec ASRC clock source to track I2S1 clock, because codec
199 	 * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
200 	 * be supported by RT5672. Otherwise, ASRC will be disabled and cause
201 	 * noise.
202 	 */
203 	rt5670_sel_asrc_clk_src(component,
204 				RT5670_DA_STEREO_FILTER
205 				| RT5670_DA_MONO_L_FILTER
206 				| RT5670_DA_MONO_R_FILTER
207 				| RT5670_AD_STEREO_FILTER
208 				| RT5670_AD_MONO_L_FILTER
209 				| RT5670_AD_MONO_R_FILTER,
210 				RT5670_CLK_SEL_I2S1_ASRC);
211 
212 	if (ctx->use_ssp0) {
213 		ret = snd_soc_dapm_add_routes(&runtime->card->dapm,
214 					      cht_audio_ssp0_map,
215 					      ARRAY_SIZE(cht_audio_ssp0_map));
216 	} else {
217 		ret = snd_soc_dapm_add_routes(&runtime->card->dapm,
218 					      cht_audio_ssp2_map,
219 					      ARRAY_SIZE(cht_audio_ssp2_map));
220 	}
221 	if (ret)
222 		return ret;
223 
224 	ret = snd_soc_card_jack_new_pins(runtime->card, "Headset",
225 					 SND_JACK_HEADSET | SND_JACK_BTN_0 |
226 					 SND_JACK_BTN_1 | SND_JACK_BTN_2,
227 					 &ctx->headset,
228 					 cht_bsw_headset_pins,
229 					 ARRAY_SIZE(cht_bsw_headset_pins));
230         if (ret)
231                 return ret;
232 
233 	snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
234 	snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_1, KEY_VOLUMEUP);
235 	snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN);
236 
237 	rt5670_set_jack_detect(component, &ctx->headset);
238 	if (ctx->mclk) {
239 		/*
240 		 * The firmware might enable the clock at
241 		 * boot (this information may or may not
242 		 * be reflected in the enable clock register).
243 		 * To change the rate we must disable the clock
244 		 * first to cover these cases. Due to common
245 		 * clock framework restrictions that do not allow
246 		 * to disable a clock that has not been enabled,
247 		 * we need to enable the clock first.
248 		 */
249 		ret = clk_prepare_enable(ctx->mclk);
250 		if (!ret)
251 			clk_disable_unprepare(ctx->mclk);
252 
253 		ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ);
254 
255 		if (ret) {
256 			dev_err(runtime->dev, "unable to set MCLK rate\n");
257 			return ret;
258 		}
259 	}
260 	return 0;
261 }
262 
cht_codec_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)263 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
264 			    struct snd_pcm_hw_params *params)
265 {
266 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(rtd->card);
267 	struct snd_interval *rate = hw_param_interval(params,
268 			SNDRV_PCM_HW_PARAM_RATE);
269 	struct snd_interval *channels = hw_param_interval(params,
270 						SNDRV_PCM_HW_PARAM_CHANNELS);
271 	int ret, bits;
272 
273 	/* The DSP will convert the FE rate to 48k, stereo, 24bits */
274 	rate->min = rate->max = 48000;
275 	channels->min = channels->max = 2;
276 
277 	if (ctx->use_ssp0) {
278 		/* set SSP0 to 16-bit */
279 		params_set_format(params, SNDRV_PCM_FORMAT_S16_LE);
280 		bits = 16;
281 	} else {
282 		/* set SSP2 to 24-bit */
283 		params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
284 		bits = 24;
285 	}
286 
287 	/*
288 	 * The default mode for the cpu-dai is TDM 4 slot. The default mode
289 	 * for the codec-dai is I2S. So we need to either set the cpu-dai to
290 	 * I2S mode to match the codec-dai, or set the codec-dai to TDM 4 slot
291 	 * (or program both to yet another mode).
292 	 * One board, the Lenovo Miix 2 10, uses not 1 but 2 codecs connected
293 	 * to SSP2. The second piggy-backed, output-only codec is inside the
294 	 * keyboard-dock (which has extra speakers). Unlike the main rt5672
295 	 * codec, we cannot configure this codec, it is hard coded to use
296 	 * 2 channel 24 bit I2S. For this to work we must use I2S mode on this
297 	 * board. Since we only support 2 channels anyways, there is no need
298 	 * for TDM on any cht-bsw-rt5672 designs. So we use I2S 2ch everywhere.
299 	 */
300 	ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0),
301 				  SND_SOC_DAIFMT_I2S     |
302 				  SND_SOC_DAIFMT_NB_NF   |
303 				  SND_SOC_DAIFMT_BP_FP);
304 	if (ret < 0) {
305 		dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);
306 		return ret;
307 	}
308 
309 	ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2, bits);
310 	if (ret < 0) {
311 		dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);
312 		return ret;
313 	}
314 
315 	return 0;
316 }
317 
cht_aif1_startup(struct snd_pcm_substream * substream)318 static int cht_aif1_startup(struct snd_pcm_substream *substream)
319 {
320 	return snd_pcm_hw_constraint_single(substream->runtime,
321 			SNDRV_PCM_HW_PARAM_RATE, 48000);
322 }
323 
324 static const struct snd_soc_ops cht_aif1_ops = {
325 	.startup = cht_aif1_startup,
326 };
327 
328 static const struct snd_soc_ops cht_be_ssp2_ops = {
329 	.hw_params = cht_aif1_hw_params,
330 };
331 
332 SND_SOC_DAILINK_DEF(dummy,
333 	DAILINK_COMP_ARRAY(COMP_DUMMY()));
334 
335 SND_SOC_DAILINK_DEF(media,
336 	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
337 
338 SND_SOC_DAILINK_DEF(deepbuffer,
339 	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
340 
341 SND_SOC_DAILINK_DEF(ssp2_port,
342 	DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
343 SND_SOC_DAILINK_DEF(ssp2_codec,
344 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-10EC5670:00",
345 				      "rt5670-aif1")));
346 
347 SND_SOC_DAILINK_DEF(platform,
348 	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
349 
350 static struct snd_soc_dai_link cht_dailink[] = {
351 	/* Front End DAI links */
352 	[MERR_DPCM_AUDIO] = {
353 		.name = "Audio Port",
354 		.stream_name = "Audio",
355 		.nonatomic = true,
356 		.dynamic = 1,
357 		.dpcm_playback = 1,
358 		.dpcm_capture = 1,
359 		.ops = &cht_aif1_ops,
360 		SND_SOC_DAILINK_REG(media, dummy, platform),
361 	},
362 	[MERR_DPCM_DEEP_BUFFER] = {
363 		.name = "Deep-Buffer Audio Port",
364 		.stream_name = "Deep-Buffer Audio",
365 		.nonatomic = true,
366 		.dynamic = 1,
367 		.dpcm_playback = 1,
368 		.ops = &cht_aif1_ops,
369 		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
370 	},
371 
372 	/* Back End DAI links */
373 	{
374 		/* SSP2 - Codec */
375 		.name = "SSP2-Codec",
376 		.id = 0,
377 		.no_pcm = 1,
378 		.init = cht_codec_init,
379 		.be_hw_params_fixup = cht_codec_fixup,
380 		.dpcm_playback = 1,
381 		.dpcm_capture = 1,
382 		.ops = &cht_be_ssp2_ops,
383 		SND_SOC_DAILINK_REG(ssp2_port, ssp2_codec, platform),
384 	},
385 };
386 
cht_suspend_pre(struct snd_soc_card * card)387 static int cht_suspend_pre(struct snd_soc_card *card)
388 {
389 	struct snd_soc_component *component;
390 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
391 
392 	for_each_card_components(card, component) {
393 		if (!strncmp(component->name,
394 			     ctx->codec_name, sizeof(ctx->codec_name))) {
395 
396 			dev_dbg(component->dev, "disabling jack detect before going to suspend.\n");
397 			rt5670_jack_suspend(component);
398 			break;
399 		}
400 	}
401 	return 0;
402 }
403 
cht_resume_post(struct snd_soc_card * card)404 static int cht_resume_post(struct snd_soc_card *card)
405 {
406 	struct snd_soc_component *component;
407 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
408 
409 	for_each_card_components(card, component) {
410 		if (!strncmp(component->name,
411 			     ctx->codec_name, sizeof(ctx->codec_name))) {
412 
413 			dev_dbg(component->dev, "enabling jack detect for resume.\n");
414 			rt5670_jack_resume(component);
415 			break;
416 		}
417 	}
418 
419 	return 0;
420 }
421 
422 /* use space before codec name to simplify card ID, and simplify driver name */
423 #define SOF_CARD_NAME "bytcht rt5672" /* card name will be 'sof-bytcht rt5672' */
424 #define SOF_DRIVER_NAME "SOF"
425 
426 #define CARD_NAME "cht-bsw-rt5672"
427 #define DRIVER_NAME NULL /* card name will be used for driver name */
428 
429 /* SoC card */
430 static struct snd_soc_card snd_soc_card_cht = {
431 	.owner = THIS_MODULE,
432 	.dai_link = cht_dailink,
433 	.num_links = ARRAY_SIZE(cht_dailink),
434 	.dapm_widgets = cht_dapm_widgets,
435 	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
436 	.dapm_routes = cht_audio_map,
437 	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
438 	.controls = cht_mc_controls,
439 	.num_controls = ARRAY_SIZE(cht_mc_controls),
440 	.suspend_pre = cht_suspend_pre,
441 	.resume_post = cht_resume_post,
442 };
443 
444 #define RT5672_I2C_DEFAULT	"i2c-10EC5670:00"
445 
snd_cht_mc_probe(struct platform_device * pdev)446 static int snd_cht_mc_probe(struct platform_device *pdev)
447 {
448 	int ret_val = 0;
449 	struct cht_mc_private *drv;
450 	struct snd_soc_acpi_mach *mach = pdev->dev.platform_data;
451 	const char *platform_name;
452 	struct acpi_device *adev;
453 	bool sof_parent;
454 	int dai_index = 0;
455 	int i;
456 
457 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
458 	if (!drv)
459 		return -ENOMEM;
460 
461 	strcpy(drv->codec_name, RT5672_I2C_DEFAULT);
462 
463 	/* find index of codec dai */
464 	for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
465 		if (!strcmp(cht_dailink[i].codecs->name, RT5672_I2C_DEFAULT)) {
466 			dai_index = i;
467 			break;
468 		}
469 	}
470 
471 	/* fixup codec name based on HID */
472 	adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
473 	if (adev) {
474 		snprintf(drv->codec_name, sizeof(drv->codec_name),
475 			 "i2c-%s", acpi_dev_name(adev));
476 		cht_dailink[dai_index].codecs->name = drv->codec_name;
477 	}
478 	acpi_dev_put(adev);
479 
480 	/* Use SSP0 on Bay Trail CR devices */
481 	if (soc_intel_is_byt() && mach->mach_params.acpi_ipc_irq_index == 0) {
482 		cht_dailink[dai_index].cpus->dai_name = "ssp0-port";
483 		drv->use_ssp0 = true;
484 	}
485 
486 	/* override platform name, if required */
487 	snd_soc_card_cht.dev = &pdev->dev;
488 	platform_name = mach->mach_params.platform;
489 
490 	ret_val = snd_soc_fixup_dai_links_platform_name(&snd_soc_card_cht,
491 							platform_name);
492 	if (ret_val)
493 		return ret_val;
494 
495 	snd_soc_card_cht.components = rt5670_components();
496 
497 	drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
498 	if (IS_ERR(drv->mclk)) {
499 		dev_err(&pdev->dev,
500 			"Failed to get MCLK from pmc_plt_clk_3: %ld\n",
501 			PTR_ERR(drv->mclk));
502 		return PTR_ERR(drv->mclk);
503 	}
504 	snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
505 
506 	sof_parent = snd_soc_acpi_sof_parent(&pdev->dev);
507 
508 	/* set card and driver name */
509 	if (sof_parent) {
510 		snd_soc_card_cht.name = SOF_CARD_NAME;
511 		snd_soc_card_cht.driver_name = SOF_DRIVER_NAME;
512 	} else {
513 		snd_soc_card_cht.name = CARD_NAME;
514 		snd_soc_card_cht.driver_name = DRIVER_NAME;
515 	}
516 
517 	/* set pm ops */
518 	if (sof_parent)
519 		pdev->dev.driver->pm = &snd_soc_pm_ops;
520 
521 	/* register the soc card */
522 	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
523 	if (ret_val) {
524 		dev_err(&pdev->dev,
525 			"snd_soc_register_card failed %d\n", ret_val);
526 		return ret_val;
527 	}
528 	platform_set_drvdata(pdev, &snd_soc_card_cht);
529 	return ret_val;
530 }
531 
532 static struct platform_driver snd_cht_mc_driver = {
533 	.driver = {
534 		.name = "cht-bsw-rt5672",
535 	},
536 	.probe = snd_cht_mc_probe,
537 };
538 
539 module_platform_driver(snd_cht_mc_driver);
540 
541 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
542 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
543 MODULE_LICENSE("GPL v2");
544 MODULE_ALIAS("platform:cht-bsw-rt5672");
545