1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  bytcr_wm5102.c - ASoc Machine driver for Intel Baytrail platforms with a
4  *                   Wolfson Microelectronics WM5102 codec
5  *
6  *  Copyright (C) 2020 Hans de Goede <hdegoede@redhat.com>
7  *  Loosely based on bytcr_rt5640.c which is:
8  *  Copyright (C) 2014-2020 Intel Corp
9  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
10  */
11 
12 #include <linux/acpi.h>
13 #include <linux/clk.h>
14 #include <linux/device.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/platform_device.h>
19 #include <linux/slab.h>
20 #include <linux/spi/spi.h>
21 #include <sound/jack.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/soc-acpi.h>
26 #include "../../codecs/wm5102.h"
27 #include "../atom/sst-atom-controls.h"
28 
29 #define MCLK_FREQ		25000000
30 
31 #define WM5102_MAX_SYSCLK_4K	49152000 /* max sysclk for 4K family */
32 #define WM5102_MAX_SYSCLK_11025	45158400 /* max sysclk for 11.025K family */
33 
34 struct byt_wm5102_private {
35 	struct snd_soc_jack jack;
36 	struct clk *mclk;
37 	struct gpio_desc *spkvdd_en_gpio;
38 };
39 
40 static int byt_wm5102_spkvdd_power_event(struct snd_soc_dapm_widget *w,
41 	struct snd_kcontrol *kcontrol, int event)
42 {
43 	struct snd_soc_card *card = w->dapm->card;
44 	struct byt_wm5102_private *priv = snd_soc_card_get_drvdata(card);
45 
46 	gpiod_set_value_cansleep(priv->spkvdd_en_gpio,
47 				 !!SND_SOC_DAPM_EVENT_ON(event));
48 
49 	return 0;
50 }
51 
52 static int byt_wm5102_prepare_and_enable_pll1(struct snd_soc_dai *codec_dai, int rate)
53 {
54 	struct snd_soc_component *codec_component = codec_dai->component;
55 	int sr_mult = ((rate % 4000) == 0) ?
56 		(WM5102_MAX_SYSCLK_4K / rate) :
57 		(WM5102_MAX_SYSCLK_11025 / rate);
58 	int ret;
59 
60 	/* Reset FLL1 */
61 	snd_soc_dai_set_pll(codec_dai, WM5102_FLL1_REFCLK, ARIZONA_FLL_SRC_NONE, 0, 0);
62 	snd_soc_dai_set_pll(codec_dai, WM5102_FLL1, ARIZONA_FLL_SRC_NONE, 0, 0);
63 
64 	/* Configure the FLL1 PLL before selecting it */
65 	ret = snd_soc_dai_set_pll(codec_dai, WM5102_FLL1, ARIZONA_CLK_SRC_MCLK1,
66 				  MCLK_FREQ, rate * sr_mult);
67 	if (ret) {
68 		dev_err(codec_component->dev, "Error setting PLL: %d\n", ret);
69 		return ret;
70 	}
71 
72 	ret = snd_soc_component_set_sysclk(codec_component, ARIZONA_CLK_SYSCLK,
73 					   ARIZONA_CLK_SRC_FLL1, rate * sr_mult,
74 					   SND_SOC_CLOCK_IN);
75 	if (ret) {
76 		dev_err(codec_component->dev, "Error setting SYSCLK: %d\n", ret);
77 		return ret;
78 	}
79 
80 	ret = snd_soc_dai_set_sysclk(codec_dai, ARIZONA_CLK_SYSCLK,
81 				     rate * 512, SND_SOC_CLOCK_IN);
82 	if (ret) {
83 		dev_err(codec_component->dev, "Error setting clock: %d\n", ret);
84 		return ret;
85 	}
86 
87 	return 0;
88 }
89 
90 static int platform_clock_control(struct snd_soc_dapm_widget *w,
91 				  struct snd_kcontrol *k, int event)
92 {
93 	struct snd_soc_dapm_context *dapm = w->dapm;
94 	struct snd_soc_card *card = dapm->card;
95 	struct snd_soc_dai *codec_dai;
96 	struct byt_wm5102_private *priv = snd_soc_card_get_drvdata(card);
97 	int ret;
98 
99 	codec_dai = snd_soc_card_get_codec_dai(card, "wm5102-aif1");
100 	if (!codec_dai) {
101 		dev_err(card->dev, "Error codec DAI not found\n");
102 		return -EIO;
103 	}
104 
105 	if (SND_SOC_DAPM_EVENT_ON(event)) {
106 		ret = clk_prepare_enable(priv->mclk);
107 		if (ret) {
108 			dev_err(card->dev, "Error enabling MCLK: %d\n", ret);
109 			return ret;
110 		}
111 		ret = byt_wm5102_prepare_and_enable_pll1(codec_dai, 48000);
112 		if (ret) {
113 			dev_err(card->dev, "Error setting codec sysclk: %d\n", ret);
114 			return ret;
115 		}
116 	} else {
117 		/*
118 		 * The WM5102 has a separate 32KHz clock for jack-detect
119 		 * so we can disable the PLL, followed by disabling the
120 		 * platform clock which is the source-clock for the PLL.
121 		 */
122 		snd_soc_dai_set_pll(codec_dai, WM5102_FLL1, ARIZONA_FLL_SRC_NONE, 0, 0);
123 		clk_disable_unprepare(priv->mclk);
124 	}
125 
126 	return 0;
127 }
128 
129 static const struct snd_soc_dapm_widget byt_wm5102_widgets[] = {
130 	SND_SOC_DAPM_HP("Headphone", NULL),
131 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
132 	SND_SOC_DAPM_MIC("Internal Mic", NULL),
133 	SND_SOC_DAPM_SPK("Speaker", NULL),
134 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
135 			    platform_clock_control, SND_SOC_DAPM_PRE_PMU |
136 			    SND_SOC_DAPM_POST_PMD),
137 	SND_SOC_DAPM_SUPPLY("Speaker VDD", SND_SOC_NOPM, 0, 0,
138 			    byt_wm5102_spkvdd_power_event,
139 			    SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMU),
140 };
141 
142 static const struct snd_soc_dapm_route byt_wm5102_audio_map[] = {
143 	{"Headphone", NULL, "Platform Clock"},
144 	{"Headset Mic", NULL, "Platform Clock"},
145 	{"Internal Mic", NULL, "Platform Clock"},
146 	{"Speaker", NULL, "Platform Clock"},
147 
148 	{"Speaker", NULL, "SPKOUTLP"},
149 	{"Speaker", NULL, "SPKOUTLN"},
150 	{"Speaker", NULL, "SPKOUTRP"},
151 	{"Speaker", NULL, "SPKOUTRN"},
152 	{"Speaker", NULL, "Speaker VDD"},
153 
154 	{"Headphone", NULL, "HPOUT1L"},
155 	{"Headphone", NULL, "HPOUT1R"},
156 
157 	{"Internal Mic", NULL, "MICBIAS3"},
158 	{"IN3L", NULL, "Internal Mic"},
159 
160 	/*
161 	 * The Headset Mix uses MICBIAS1 or 2 depending on if a CTIA/OMTP Headset
162 	 * is connected, as the MICBIAS is applied after the CTIA/OMTP cross-switch.
163 	 */
164 	{"Headset Mic", NULL, "MICBIAS1"},
165 	{"Headset Mic", NULL, "MICBIAS2"},
166 	{"IN1L", NULL, "Headset Mic"},
167 
168 	{"AIF1 Playback", NULL, "ssp0 Tx"},
169 	{"ssp0 Tx", NULL, "modem_out"},
170 
171 	{"modem_in", NULL, "ssp0 Rx"},
172 	{"ssp0 Rx", NULL, "AIF1 Capture"},
173 };
174 
175 static const struct snd_kcontrol_new byt_wm5102_controls[] = {
176 	SOC_DAPM_PIN_SWITCH("Headphone"),
177 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
178 	SOC_DAPM_PIN_SWITCH("Internal Mic"),
179 	SOC_DAPM_PIN_SWITCH("Speaker"),
180 };
181 
182 static struct snd_soc_jack_pin byt_wm5102_pins[] = {
183 	{
184 		.pin	= "Headphone",
185 		.mask	= SND_JACK_HEADPHONE,
186 	},
187 	{
188 		.pin	= "Headset Mic",
189 		.mask	= SND_JACK_MICROPHONE,
190 	},
191 };
192 
193 static int byt_wm5102_init(struct snd_soc_pcm_runtime *runtime)
194 {
195 	struct snd_soc_card *card = runtime->card;
196 	struct byt_wm5102_private *priv = snd_soc_card_get_drvdata(card);
197 	struct snd_soc_component *component = asoc_rtd_to_codec(runtime, 0)->component;
198 	int ret, jack_type;
199 
200 	card->dapm.idle_bias_off = true;
201 
202 	ret = snd_soc_add_card_controls(card, byt_wm5102_controls,
203 					ARRAY_SIZE(byt_wm5102_controls));
204 	if (ret) {
205 		dev_err(card->dev, "Error adding card controls: %d\n", ret);
206 		return ret;
207 	}
208 
209 	/*
210 	 * The firmware might enable the clock at boot (this information
211 	 * may or may not be reflected in the enable clock register).
212 	 * To change the rate we must disable the clock first to cover these
213 	 * cases. Due to common clock framework restrictions that do not allow
214 	 * to disable a clock that has not been enabled, we need to enable
215 	 * the clock first.
216 	 */
217 	ret = clk_prepare_enable(priv->mclk);
218 	if (!ret)
219 		clk_disable_unprepare(priv->mclk);
220 
221 	ret = clk_set_rate(priv->mclk, MCLK_FREQ);
222 	if (ret) {
223 		dev_err(card->dev, "Error setting MCLK rate: %d\n", ret);
224 		return ret;
225 	}
226 
227 	jack_type = ARIZONA_JACK_MASK | SND_JACK_BTN_0 | SND_JACK_BTN_1 |
228 		    SND_JACK_BTN_2 | SND_JACK_BTN_3;
229 	ret = snd_soc_card_jack_new_pins(card, "Headset", jack_type,
230 					 &priv->jack, byt_wm5102_pins,
231 					 ARRAY_SIZE(byt_wm5102_pins));
232 	if (ret) {
233 		dev_err(card->dev, "Error creating jack: %d\n", ret);
234 		return ret;
235 	}
236 
237 	snd_soc_component_set_jack(component, &priv->jack, NULL);
238 
239 	return 0;
240 }
241 
242 static int byt_wm5102_codec_fixup(struct snd_soc_pcm_runtime *rtd,
243 				  struct snd_pcm_hw_params *params)
244 {
245 	struct snd_interval *rate = hw_param_interval(params,
246 						      SNDRV_PCM_HW_PARAM_RATE);
247 	struct snd_interval *channels = hw_param_interval(params,
248 							  SNDRV_PCM_HW_PARAM_CHANNELS);
249 	int ret;
250 
251 	/* The DSP will convert the FE rate to 48k, stereo */
252 	rate->min = 48000;
253 	rate->max = 48000;
254 	channels->min = 2;
255 	channels->max = 2;
256 
257 	/* set SSP0 to 16-bit */
258 	params_set_format(params, SNDRV_PCM_FORMAT_S16_LE);
259 
260 	/*
261 	 * Default mode for SSP configuration is TDM 4 slot, override config
262 	 * with explicit setting to I2S 2ch 16-bit. The word length is set with
263 	 * dai_set_tdm_slot() since there is no other API exposed
264 	 */
265 	ret = snd_soc_dai_set_fmt(asoc_rtd_to_cpu(rtd, 0),
266 				  SND_SOC_DAIFMT_I2S     |
267 				  SND_SOC_DAIFMT_NB_NF   |
268 				  SND_SOC_DAIFMT_BP_FP);
269 	if (ret) {
270 		dev_err(rtd->dev, "Error setting format to I2S: %d\n", ret);
271 		return ret;
272 	}
273 
274 	ret = snd_soc_dai_set_tdm_slot(asoc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2, 16);
275 	if (ret) {
276 		dev_err(rtd->dev, "Error setting I2S config: %d\n", ret);
277 		return ret;
278 	}
279 
280 	return 0;
281 }
282 
283 static int byt_wm5102_aif1_startup(struct snd_pcm_substream *substream)
284 {
285 	return snd_pcm_hw_constraint_single(substream->runtime,
286 					    SNDRV_PCM_HW_PARAM_RATE, 48000);
287 }
288 
289 static const struct snd_soc_ops byt_wm5102_aif1_ops = {
290 	.startup = byt_wm5102_aif1_startup,
291 };
292 
293 SND_SOC_DAILINK_DEF(dummy,
294 	DAILINK_COMP_ARRAY(COMP_DUMMY()));
295 
296 SND_SOC_DAILINK_DEF(media,
297 	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
298 
299 SND_SOC_DAILINK_DEF(deepbuffer,
300 	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
301 
302 SND_SOC_DAILINK_DEF(ssp0_port,
303 	DAILINK_COMP_ARRAY(COMP_CPU("ssp0-port")));
304 
305 SND_SOC_DAILINK_DEF(ssp0_codec,
306 	DAILINK_COMP_ARRAY(COMP_CODEC(
307 	/*
308 	 * Note there is no need to overwrite the codec-name as is done in
309 	 * other bytcr machine drivers, because the codec is a MFD child-dev.
310 	 */
311 	"wm5102-codec",
312 	"wm5102-aif1")));
313 
314 SND_SOC_DAILINK_DEF(platform,
315 	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
316 
317 static struct snd_soc_dai_link byt_wm5102_dais[] = {
318 	[MERR_DPCM_AUDIO] = {
319 		.name = "Baytrail Audio Port",
320 		.stream_name = "Baytrail Audio",
321 		.nonatomic = true,
322 		.dynamic = 1,
323 		.dpcm_playback = 1,
324 		.dpcm_capture = 1,
325 		.ops = &byt_wm5102_aif1_ops,
326 		SND_SOC_DAILINK_REG(media, dummy, platform),
327 
328 	},
329 	[MERR_DPCM_DEEP_BUFFER] = {
330 		.name = "Deep-Buffer Audio Port",
331 		.stream_name = "Deep-Buffer Audio",
332 		.nonatomic = true,
333 		.dynamic = 1,
334 		.dpcm_playback = 1,
335 		.ops = &byt_wm5102_aif1_ops,
336 		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
337 	},
338 		/* back ends */
339 	{
340 		/*
341 		 * This must be named SSP2-Codec even though this machine driver
342 		 * always uses SSP0. Most machine drivers support both and dynamically
343 		 * update the dailink to point to SSP0 or SSP2, while keeping the name
344 		 * as "SSP2-Codec". The SOF tplg files hardcode the "SSP2-Codec" even
345 		 * in the byt-foo-ssp0.tplg versions because the other machine-drivers
346 		 * use "SSP2-Codec" even when SSP0 is used.
347 		 */
348 		.name = "SSP2-Codec",
349 		.id = 0,
350 		.no_pcm = 1,
351 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
352 						| SND_SOC_DAIFMT_CBC_CFC,
353 		.be_hw_params_fixup = byt_wm5102_codec_fixup,
354 		.dpcm_playback = 1,
355 		.dpcm_capture = 1,
356 		.init = byt_wm5102_init,
357 		SND_SOC_DAILINK_REG(ssp0_port, ssp0_codec, platform),
358 	},
359 };
360 
361 /* use space before codec name to simplify card ID, and simplify driver name */
362 #define SOF_CARD_NAME "bytcht wm5102" /* card name will be 'sof-bytcht wm5102' */
363 #define SOF_DRIVER_NAME "SOF"
364 
365 #define CARD_NAME "bytcr-wm5102"
366 #define DRIVER_NAME NULL /* card name will be used for driver name */
367 
368 /* SoC card */
369 static struct snd_soc_card byt_wm5102_card = {
370 	.owner = THIS_MODULE,
371 	.dai_link = byt_wm5102_dais,
372 	.num_links = ARRAY_SIZE(byt_wm5102_dais),
373 	.dapm_widgets = byt_wm5102_widgets,
374 	.num_dapm_widgets = ARRAY_SIZE(byt_wm5102_widgets),
375 	.dapm_routes = byt_wm5102_audio_map,
376 	.num_dapm_routes = ARRAY_SIZE(byt_wm5102_audio_map),
377 	.fully_routed = true,
378 };
379 
380 static int snd_byt_wm5102_mc_probe(struct platform_device *pdev)
381 {
382 	char codec_name[SND_ACPI_I2C_ID_LEN];
383 	struct device *dev = &pdev->dev;
384 	struct byt_wm5102_private *priv;
385 	struct snd_soc_acpi_mach *mach;
386 	const char *platform_name;
387 	struct acpi_device *adev;
388 	struct device *codec_dev;
389 	bool sof_parent;
390 	int ret;
391 
392 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
393 	if (!priv)
394 		return -ENOMEM;
395 
396 	/* Get MCLK */
397 	priv->mclk = devm_clk_get(dev, "pmc_plt_clk_3");
398 	if (IS_ERR(priv->mclk))
399 		return dev_err_probe(dev, PTR_ERR(priv->mclk), "getting pmc_plt_clk_3\n");
400 
401 	/*
402 	 * Get speaker VDD enable GPIO:
403 	 * 1. Get codec-device-name
404 	 * 2. Get codec-device
405 	 * 3. Get GPIO from codec-device
406 	 */
407 	mach = dev->platform_data;
408 	adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
409 	if (!adev) {
410 		dev_err(dev, "Error cannot find acpi-dev for codec\n");
411 		return -ENOENT;
412 	}
413 	snprintf(codec_name, sizeof(codec_name), "spi-%s", acpi_dev_name(adev));
414 	put_device(&adev->dev);
415 
416 	codec_dev = bus_find_device_by_name(&spi_bus_type, NULL, codec_name);
417 	if (!codec_dev)
418 		return -EPROBE_DEFER;
419 
420 	/* Note no devm_ here since we call gpiod_get on codec_dev rather then dev */
421 	priv->spkvdd_en_gpio = gpiod_get(codec_dev, "wlf,spkvdd-ena", GPIOD_OUT_LOW);
422 	put_device(codec_dev);
423 
424 	if (IS_ERR(priv->spkvdd_en_gpio)) {
425 		ret = PTR_ERR(priv->spkvdd_en_gpio);
426 		/*
427 		 * The spkvdd gpio-lookup is registered by: drivers/mfd/arizona-spi.c,
428 		 * so -ENOENT means that arizona-spi hasn't probed yet.
429 		 */
430 		if (ret == -ENOENT)
431 			ret = -EPROBE_DEFER;
432 
433 		return dev_err_probe(dev, ret, "getting spkvdd-GPIO\n");
434 	}
435 
436 	/* override platform name, if required */
437 	byt_wm5102_card.dev = dev;
438 	platform_name = mach->mach_params.platform;
439 	ret = snd_soc_fixup_dai_links_platform_name(&byt_wm5102_card, platform_name);
440 	if (ret)
441 		goto out_put_gpio;
442 
443 	/* set card and driver name and pm-ops */
444 	sof_parent = snd_soc_acpi_sof_parent(dev);
445 	if (sof_parent) {
446 		byt_wm5102_card.name = SOF_CARD_NAME;
447 		byt_wm5102_card.driver_name = SOF_DRIVER_NAME;
448 		dev->driver->pm = &snd_soc_pm_ops;
449 	} else {
450 		byt_wm5102_card.name = CARD_NAME;
451 		byt_wm5102_card.driver_name = DRIVER_NAME;
452 	}
453 
454 	snd_soc_card_set_drvdata(&byt_wm5102_card, priv);
455 	ret = devm_snd_soc_register_card(dev, &byt_wm5102_card);
456 	if (ret) {
457 		dev_err_probe(dev, ret, "registering card\n");
458 		goto out_put_gpio;
459 	}
460 
461 	platform_set_drvdata(pdev, &byt_wm5102_card);
462 	return 0;
463 
464 out_put_gpio:
465 	gpiod_put(priv->spkvdd_en_gpio);
466 	return ret;
467 }
468 
469 static int snd_byt_wm5102_mc_remove(struct platform_device *pdev)
470 {
471 	struct snd_soc_card *card = platform_get_drvdata(pdev);
472 	struct byt_wm5102_private *priv = snd_soc_card_get_drvdata(card);
473 
474 	gpiod_put(priv->spkvdd_en_gpio);
475 	return 0;
476 }
477 
478 static struct platform_driver snd_byt_wm5102_mc_driver = {
479 	.driver = {
480 		.name = "bytcr_wm5102",
481 	},
482 	.probe = snd_byt_wm5102_mc_probe,
483 	.remove = snd_byt_wm5102_mc_remove,
484 };
485 
486 module_platform_driver(snd_byt_wm5102_mc_driver);
487 
488 MODULE_DESCRIPTION("ASoC Baytrail with WM5102 codec machine driver");
489 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
490 MODULE_LICENSE("GPL v2");
491 MODULE_ALIAS("platform:bytcr_wm5102");
492