1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright(c) 2021-2022 Intel Corporation. All rights reserved.
4 //
5 // Authors: Cezary Rojewski <cezary.rojewski@intel.com>
6 //          Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>
7 //
8 
9 #include <linux/input.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <sound/core.h>
13 #include <sound/jack.h>
14 #include <sound/pcm.h>
15 #include <sound/pcm_params.h>
16 #include <sound/soc.h>
17 #include <sound/soc-acpi.h>
18 #include "../../../codecs/nau8825.h"
19 
20 #define SKL_NUVOTON_CODEC_DAI	"nau8825-hifi"
21 
22 static int
avs_nau8825_clock_control(struct snd_soc_dapm_widget * w,struct snd_kcontrol * control,int event)23 avs_nau8825_clock_control(struct snd_soc_dapm_widget *w, struct snd_kcontrol *control, int event)
24 {
25 	struct snd_soc_dapm_context *dapm = w->dapm;
26 	struct snd_soc_card *card = dapm->card;
27 	struct snd_soc_dai *codec_dai;
28 	int ret;
29 
30 	codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
31 	if (!codec_dai) {
32 		dev_err(card->dev, "Codec dai not found\n");
33 		return -EINVAL;
34 	}
35 
36 	if (!SND_SOC_DAPM_EVENT_ON(event)) {
37 		ret = snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_INTERNAL, 0, SND_SOC_CLOCK_IN);
38 		if (ret < 0) {
39 			dev_err(card->dev, "set sysclk err = %d\n", ret);
40 			return ret;
41 		}
42 	}
43 
44 	return 0;
45 }
46 
47 static const struct snd_kcontrol_new card_controls[] = {
48 	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
49 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
50 };
51 
52 static const struct snd_soc_dapm_widget card_widgets[] = {
53 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
54 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
55 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0, avs_nau8825_clock_control,
56 			    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
57 };
58 
59 static const struct snd_soc_dapm_route card_base_routes[] = {
60 	{ "Headphone Jack", NULL, "HPOL" },
61 	{ "Headphone Jack", NULL, "HPOR" },
62 
63 	{ "MIC", NULL, "Headset Mic" },
64 
65 	{ "Headphone Jack", NULL, "Platform Clock" },
66 	{ "Headset Mic", NULL, "Platform Clock" },
67 };
68 
69 static struct snd_soc_jack_pin card_headset_pins[] = {
70 	{
71 		.pin = "Headphone Jack",
72 		.mask = SND_JACK_HEADPHONE,
73 	},
74 	{
75 		.pin = "Headset Mic",
76 		.mask = SND_JACK_MICROPHONE,
77 	},
78 };
79 
avs_nau8825_codec_init(struct snd_soc_pcm_runtime * runtime)80 static int avs_nau8825_codec_init(struct snd_soc_pcm_runtime *runtime)
81 {
82 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(runtime, 0);
83 	struct snd_soc_component *component = codec_dai->component;
84 	struct snd_soc_jack_pin *pins;
85 	struct snd_soc_jack *jack;
86 	struct snd_soc_card *card = runtime->card;
87 	int num_pins, ret;
88 
89 	jack = snd_soc_card_get_drvdata(card);
90 	num_pins = ARRAY_SIZE(card_headset_pins);
91 
92 	pins = devm_kmemdup(card->dev, card_headset_pins, sizeof(*pins) * num_pins, GFP_KERNEL);
93 	if (!pins)
94 		return -ENOMEM;
95 
96 	/*
97 	 * 4 buttons here map to the google Reference headset.
98 	 * The use of these buttons can be decided by the user space.
99 	 */
100 	ret = snd_soc_card_jack_new_pins(card, "Headset", SND_JACK_HEADSET | SND_JACK_BTN_0 |
101 					 SND_JACK_BTN_1 | SND_JACK_BTN_2 | SND_JACK_BTN_3,
102 					 jack, pins, num_pins);
103 	if (ret)
104 		return ret;
105 
106 	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
107 	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
108 	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
109 	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
110 
111 	//snd_soc_component_set_jack(component, jack, NULL);
112 	// TODO: Fix nau8825 codec to use .set_jack, like everyone else
113 	nau8825_enable_jack_detect(component, jack);
114 
115 	return 0;
116 }
117 
118 static int
avs_nau8825_be_fixup(struct snd_soc_pcm_runtime * runtime,struct snd_pcm_hw_params * params)119 avs_nau8825_be_fixup(struct snd_soc_pcm_runtime *runtime, struct snd_pcm_hw_params *params)
120 {
121 	struct snd_interval *rate, *channels;
122 	struct snd_mask *fmt;
123 
124 	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
125 	channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
126 	fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
127 
128 	/* The ADSP will convert the FE rate to 48k, stereo */
129 	rate->min = rate->max = 48000;
130 	channels->min = channels->max = 2;
131 
132 	/* set SSP to 24 bit */
133 	snd_mask_none(fmt);
134 	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE);
135 
136 	return 0;
137 }
138 
avs_nau8825_trigger(struct snd_pcm_substream * substream,int cmd)139 static int avs_nau8825_trigger(struct snd_pcm_substream *substream, int cmd)
140 {
141 	struct snd_pcm_runtime *runtime = substream->runtime;
142 	struct snd_soc_pcm_runtime *rtm = asoc_substream_to_rtd(substream);
143 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtm, 0);
144 	int ret = 0;
145 
146 	switch (cmd) {
147 	case SNDRV_PCM_TRIGGER_START:
148 		ret = snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0, SND_SOC_CLOCK_IN);
149 		if (ret < 0) {
150 			dev_err(codec_dai->dev, "can't set FS clock %d\n", ret);
151 			break;
152 		}
153 
154 		ret = snd_soc_dai_set_pll(codec_dai, 0, 0, runtime->rate, runtime->rate * 256);
155 		if (ret < 0)
156 			dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
157 		break;
158 
159 	case SNDRV_PCM_TRIGGER_RESUME:
160 		ret = snd_soc_dai_set_pll(codec_dai, 0, 0, runtime->rate, runtime->rate * 256);
161 		if (ret < 0)
162 			dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
163 		break;
164 	}
165 
166 	return ret;
167 }
168 
169 
170 static const struct snd_soc_ops avs_nau8825_ops = {
171 	.trigger = avs_nau8825_trigger,
172 };
173 
avs_create_dai_link(struct device * dev,const char * platform_name,int ssp_port,struct snd_soc_dai_link ** dai_link)174 static int avs_create_dai_link(struct device *dev, const char *platform_name, int ssp_port,
175 			       struct snd_soc_dai_link **dai_link)
176 {
177 	struct snd_soc_dai_link_component *platform;
178 	struct snd_soc_dai_link *dl;
179 
180 	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
181 	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
182 	if (!dl || !platform)
183 		return -ENOMEM;
184 
185 	platform->name = platform_name;
186 
187 	dl->name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d-Codec", ssp_port);
188 	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
189 	dl->codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
190 	if (!dl->name || !dl->cpus || !dl->codecs)
191 		return -ENOMEM;
192 
193 	dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "SSP%d Pin", ssp_port);
194 	dl->codecs->name = devm_kasprintf(dev, GFP_KERNEL, "i2c-10508825:00");
195 	dl->codecs->dai_name = devm_kasprintf(dev, GFP_KERNEL, SKL_NUVOTON_CODEC_DAI);
196 	if (!dl->cpus->dai_name || !dl->codecs->name || !dl->codecs->dai_name)
197 		return -ENOMEM;
198 
199 	dl->num_cpus = 1;
200 	dl->num_codecs = 1;
201 	dl->platforms = platform;
202 	dl->num_platforms = 1;
203 	dl->id = 0;
204 	dl->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS;
205 	dl->init = avs_nau8825_codec_init;
206 	dl->be_hw_params_fixup = avs_nau8825_be_fixup;
207 	dl->ops = &avs_nau8825_ops;
208 	dl->nonatomic = 1;
209 	dl->no_pcm = 1;
210 	dl->dpcm_capture = 1;
211 	dl->dpcm_playback = 1;
212 
213 	*dai_link = dl;
214 
215 	return 0;
216 }
217 
avs_create_dapm_routes(struct device * dev,int ssp_port,struct snd_soc_dapm_route ** routes,int * num_routes)218 static int avs_create_dapm_routes(struct device *dev, int ssp_port,
219 				  struct snd_soc_dapm_route **routes, int *num_routes)
220 {
221 	struct snd_soc_dapm_route *dr;
222 	const int num_base = ARRAY_SIZE(card_base_routes);
223 	const int num_dr = num_base + 2;
224 	int idx;
225 
226 	dr = devm_kcalloc(dev, num_dr, sizeof(*dr), GFP_KERNEL);
227 	if (!dr)
228 		return -ENOMEM;
229 
230 	memcpy(dr, card_base_routes, num_base * sizeof(*dr));
231 
232 	idx = num_base;
233 	dr[idx].sink = devm_kasprintf(dev, GFP_KERNEL, "Playback");
234 	dr[idx].source = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Tx", ssp_port);
235 	if (!dr[idx].sink || !dr[idx].source)
236 		return -ENOMEM;
237 
238 	idx++;
239 	dr[idx].sink = devm_kasprintf(dev, GFP_KERNEL, "ssp%d Rx", ssp_port);
240 	dr[idx].source = devm_kasprintf(dev, GFP_KERNEL, "Capture");
241 	if (!dr[idx].sink || !dr[idx].source)
242 		return -ENOMEM;
243 
244 	*routes = dr;
245 	*num_routes = num_dr;
246 
247 	return 0;
248 }
249 
avs_card_set_jack(struct snd_soc_card * card,struct snd_soc_jack * jack)250 static int avs_card_set_jack(struct snd_soc_card *card, struct snd_soc_jack *jack)
251 {
252 	struct snd_soc_component *component;
253 
254 	for_each_card_components(card, component)
255 		snd_soc_component_set_jack(component, jack, NULL);
256 	return 0;
257 }
258 
avs_card_remove(struct snd_soc_card * card)259 static int avs_card_remove(struct snd_soc_card *card)
260 {
261 	return avs_card_set_jack(card, NULL);
262 }
263 
avs_card_suspend_pre(struct snd_soc_card * card)264 static int avs_card_suspend_pre(struct snd_soc_card *card)
265 {
266 	return avs_card_set_jack(card, NULL);
267 }
268 
avs_card_resume_post(struct snd_soc_card * card)269 static int avs_card_resume_post(struct snd_soc_card *card)
270 {
271 	struct snd_soc_dai *codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
272 	struct snd_soc_jack *jack = snd_soc_card_get_drvdata(card);
273 
274 	if (!codec_dai) {
275 		dev_err(card->dev, "Codec dai not found\n");
276 		return -EINVAL;
277 	}
278 
279 	if (codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK] &&
280 	    codec_dai->playback_widget->active)
281 		snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0, SND_SOC_CLOCK_IN);
282 
283 	return avs_card_set_jack(card, jack);
284 }
285 
avs_nau8825_probe(struct platform_device * pdev)286 static int avs_nau8825_probe(struct platform_device *pdev)
287 {
288 	struct snd_soc_dapm_route *routes;
289 	struct snd_soc_dai_link *dai_link;
290 	struct snd_soc_acpi_mach *mach;
291 	struct snd_soc_card *card;
292 	struct snd_soc_jack *jack;
293 	struct device *dev = &pdev->dev;
294 	const char *pname;
295 	int num_routes, ssp_port, ret;
296 
297 	mach = dev_get_platdata(dev);
298 	pname = mach->mach_params.platform;
299 	ssp_port = __ffs(mach->mach_params.i2s_link_mask);
300 
301 	ret = avs_create_dai_link(dev, pname, ssp_port, &dai_link);
302 	if (ret) {
303 		dev_err(dev, "Failed to create dai link: %d", ret);
304 		return ret;
305 	}
306 
307 	ret = avs_create_dapm_routes(dev, ssp_port, &routes, &num_routes);
308 	if (ret) {
309 		dev_err(dev, "Failed to create dapm routes: %d", ret);
310 		return ret;
311 	}
312 
313 	jack = devm_kzalloc(dev, sizeof(*jack), GFP_KERNEL);
314 	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
315 	if (!jack || !card)
316 		return -ENOMEM;
317 
318 	card->name = "avs_nau8825";
319 	card->dev = dev;
320 	card->owner = THIS_MODULE;
321 	card->remove = avs_card_remove;
322 	card->suspend_pre = avs_card_suspend_pre;
323 	card->resume_post = avs_card_resume_post;
324 	card->dai_link = dai_link;
325 	card->num_links = 1;
326 	card->controls = card_controls;
327 	card->num_controls = ARRAY_SIZE(card_controls);
328 	card->dapm_widgets = card_widgets;
329 	card->num_dapm_widgets = ARRAY_SIZE(card_widgets);
330 	card->dapm_routes = routes;
331 	card->num_dapm_routes = num_routes;
332 	card->fully_routed = true;
333 	snd_soc_card_set_drvdata(card, jack);
334 
335 	ret = snd_soc_fixup_dai_links_platform_name(card, pname);
336 	if (ret)
337 		return ret;
338 
339 	return devm_snd_soc_register_card(dev, card);
340 }
341 
342 static struct platform_driver avs_nau8825_driver = {
343 	.probe = avs_nau8825_probe,
344 	.driver = {
345 		.name = "avs_nau8825",
346 		.pm = &snd_soc_pm_ops,
347 	},
348 };
349 
350 module_platform_driver(avs_nau8825_driver)
351 
352 MODULE_LICENSE("GPL");
353 MODULE_ALIAS("platform:avs_nau8825");
354