1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * mt2701-cs42448.c  --  MT2701 CS42448 ALSA SoC machine driver
4  *
5  * Copyright (c) 2016 MediaTek Inc.
6  * Author: Ir Lian <ir.lian@mediatek.com>
7  *	   Garlic Tseng <garlic.tseng@mediatek.com>
8  */
9 
10 #include <linux/module.h>
11 #include <sound/soc.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/pinctrl/consumer.h>
15 #include <linux/of_gpio.h>
16 
17 #include "mt2701-afe-common.h"
18 
19 struct mt2701_cs42448_private {
20 	int i2s1_in_mux;
21 	int i2s1_in_mux_gpio_sel_1;
22 	int i2s1_in_mux_gpio_sel_2;
23 };
24 
25 static const char * const i2sin_mux_switch_text[] = {
26 	"ADC_SDOUT2",
27 	"ADC_SDOUT3",
28 	"I2S_IN_1",
29 	"I2S_IN_2",
30 };
31 
32 static const struct soc_enum i2sin_mux_enum =
33 	SOC_ENUM_SINGLE_EXT(4, i2sin_mux_switch_text);
34 
mt2701_cs42448_i2sin1_mux_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)35 static int mt2701_cs42448_i2sin1_mux_get(struct snd_kcontrol *kcontrol,
36 					 struct snd_ctl_elem_value *ucontrol)
37 {
38 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
39 	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);
40 
41 	ucontrol->value.integer.value[0] = priv->i2s1_in_mux;
42 	return 0;
43 }
44 
mt2701_cs42448_i2sin1_mux_set(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)45 static int mt2701_cs42448_i2sin1_mux_set(struct snd_kcontrol *kcontrol,
46 					 struct snd_ctl_elem_value *ucontrol)
47 {
48 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
49 	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);
50 
51 	if (ucontrol->value.integer.value[0] == priv->i2s1_in_mux)
52 		return 0;
53 
54 	switch (ucontrol->value.integer.value[0]) {
55 	case 0:
56 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
57 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
58 		break;
59 	case 1:
60 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
61 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
62 		break;
63 	case 2:
64 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
65 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
66 		break;
67 	case 3:
68 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
69 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
70 		break;
71 	default:
72 		dev_warn(card->dev, "%s invalid setting\n", __func__);
73 	}
74 
75 	priv->i2s1_in_mux = ucontrol->value.integer.value[0];
76 	return 0;
77 }
78 
79 static const struct snd_soc_dapm_widget
80 			mt2701_cs42448_asoc_card_dapm_widgets[] = {
81 	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
82 	SND_SOC_DAPM_MIC("AMIC", NULL),
83 	SND_SOC_DAPM_LINE("Tuner In", NULL),
84 	SND_SOC_DAPM_LINE("Satellite Tuner In", NULL),
85 	SND_SOC_DAPM_LINE("AUX In", NULL),
86 };
87 
88 static const struct snd_kcontrol_new mt2701_cs42448_controls[] = {
89 	SOC_DAPM_PIN_SWITCH("Line Out Jack"),
90 	SOC_DAPM_PIN_SWITCH("AMIC"),
91 	SOC_DAPM_PIN_SWITCH("Tuner In"),
92 	SOC_DAPM_PIN_SWITCH("Satellite Tuner In"),
93 	SOC_DAPM_PIN_SWITCH("AUX In"),
94 	SOC_ENUM_EXT("I2SIN1_MUX_Switch", i2sin_mux_enum,
95 		     mt2701_cs42448_i2sin1_mux_get,
96 		     mt2701_cs42448_i2sin1_mux_set),
97 };
98 
99 static const unsigned int mt2701_cs42448_sampling_rates[] = {48000};
100 
101 static const struct snd_pcm_hw_constraint_list mt2701_cs42448_constraints_rates = {
102 		.count = ARRAY_SIZE(mt2701_cs42448_sampling_rates),
103 		.list = mt2701_cs42448_sampling_rates,
104 		.mask = 0,
105 };
106 
mt2701_cs42448_fe_ops_startup(struct snd_pcm_substream * substream)107 static int mt2701_cs42448_fe_ops_startup(struct snd_pcm_substream *substream)
108 {
109 	int err;
110 
111 	err = snd_pcm_hw_constraint_list(substream->runtime, 0,
112 					 SNDRV_PCM_HW_PARAM_RATE,
113 					 &mt2701_cs42448_constraints_rates);
114 	if (err < 0) {
115 		dev_err(substream->pcm->card->dev,
116 			"%s snd_pcm_hw_constraint_list failed: 0x%x\n",
117 			__func__, err);
118 		return err;
119 	}
120 	return 0;
121 }
122 
123 static const struct snd_soc_ops mt2701_cs42448_48k_fe_ops = {
124 	.startup = mt2701_cs42448_fe_ops_startup,
125 };
126 
mt2701_cs42448_be_ops_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)127 static int mt2701_cs42448_be_ops_hw_params(struct snd_pcm_substream *substream,
128 					   struct snd_pcm_hw_params *params)
129 {
130 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
131 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
132 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
133 	unsigned int mclk_rate;
134 	unsigned int rate = params_rate(params);
135 	unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
136 	unsigned int div_bck_over_lrck = 64;
137 
138 	mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
139 
140 	/* mt2701 mclk */
141 	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
142 
143 	/* codec mclk */
144 	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
145 
146 	return 0;
147 }
148 
149 static const struct snd_soc_ops mt2701_cs42448_be_ops = {
150 	.hw_params = mt2701_cs42448_be_ops_hw_params
151 };
152 
153 enum {
154 	DAI_LINK_FE_MULTI_CH_OUT,
155 	DAI_LINK_FE_PCM0_IN,
156 	DAI_LINK_FE_PCM1_IN,
157 	DAI_LINK_FE_BT_OUT,
158 	DAI_LINK_FE_BT_IN,
159 	DAI_LINK_BE_I2S0,
160 	DAI_LINK_BE_I2S1,
161 	DAI_LINK_BE_I2S2,
162 	DAI_LINK_BE_I2S3,
163 	DAI_LINK_BE_MRG_BT,
164 };
165 
166 SND_SOC_DAILINK_DEFS(fe_multi_ch_out,
167 	DAILINK_COMP_ARRAY(COMP_CPU("PCM_multi")),
168 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
169 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
170 
171 SND_SOC_DAILINK_DEFS(fe_pcm0_in,
172 	DAILINK_COMP_ARRAY(COMP_CPU("PCM0")),
173 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
174 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
175 
176 SND_SOC_DAILINK_DEFS(fe_pcm1_in,
177 	DAILINK_COMP_ARRAY(COMP_CPU("PCM1")),
178 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
179 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
180 
181 SND_SOC_DAILINK_DEFS(fe_bt_out,
182 	DAILINK_COMP_ARRAY(COMP_CPU("PCM_BT_DL")),
183 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
184 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
185 
186 SND_SOC_DAILINK_DEFS(fe_bt_in,
187 	DAILINK_COMP_ARRAY(COMP_CPU("PCM_BT_UL")),
188 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
189 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
190 
191 SND_SOC_DAILINK_DEFS(be_i2s0,
192 	DAILINK_COMP_ARRAY(COMP_CPU("I2S0")),
193 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
194 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
195 
196 SND_SOC_DAILINK_DEFS(be_i2s1,
197 	DAILINK_COMP_ARRAY(COMP_CPU("I2S1")),
198 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
199 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
200 
201 SND_SOC_DAILINK_DEFS(be_i2s2,
202 	DAILINK_COMP_ARRAY(COMP_CPU("I2S2")),
203 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
204 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
205 
206 SND_SOC_DAILINK_DEFS(be_i2s3,
207 	DAILINK_COMP_ARRAY(COMP_CPU("I2S3")),
208 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
209 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
210 
211 SND_SOC_DAILINK_DEFS(be_mrg_bt,
212 	DAILINK_COMP_ARRAY(COMP_CPU("MRG BT")),
213 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "bt-sco-pcm-wb")),
214 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
215 
216 static struct snd_soc_dai_link mt2701_cs42448_dai_links[] = {
217 	/* FE */
218 	[DAI_LINK_FE_MULTI_CH_OUT] = {
219 		.name = "mt2701-cs42448-multi-ch-out",
220 		.stream_name = "mt2701-cs42448-multi-ch-out",
221 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
222 			    SND_SOC_DPCM_TRIGGER_POST},
223 		.ops = &mt2701_cs42448_48k_fe_ops,
224 		.dynamic = 1,
225 		.dpcm_playback = 1,
226 		SND_SOC_DAILINK_REG(fe_multi_ch_out),
227 	},
228 	[DAI_LINK_FE_PCM0_IN] = {
229 		.name = "mt2701-cs42448-pcm0",
230 		.stream_name = "mt2701-cs42448-pcm0-data-UL",
231 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
232 			    SND_SOC_DPCM_TRIGGER_POST},
233 		.ops = &mt2701_cs42448_48k_fe_ops,
234 		.dynamic = 1,
235 		.dpcm_capture = 1,
236 		SND_SOC_DAILINK_REG(fe_pcm0_in),
237 	},
238 	[DAI_LINK_FE_PCM1_IN] = {
239 		.name = "mt2701-cs42448-pcm1-data-UL",
240 		.stream_name = "mt2701-cs42448-pcm1-data-UL",
241 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
242 			    SND_SOC_DPCM_TRIGGER_POST},
243 		.ops = &mt2701_cs42448_48k_fe_ops,
244 		.dynamic = 1,
245 		.dpcm_capture = 1,
246 		SND_SOC_DAILINK_REG(fe_pcm1_in),
247 	},
248 	[DAI_LINK_FE_BT_OUT] = {
249 		.name = "mt2701-cs42448-pcm-BT-out",
250 		.stream_name = "mt2701-cs42448-pcm-BT",
251 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
252 			    SND_SOC_DPCM_TRIGGER_POST},
253 		.dynamic = 1,
254 		.dpcm_playback = 1,
255 		SND_SOC_DAILINK_REG(fe_bt_out),
256 	},
257 	[DAI_LINK_FE_BT_IN] = {
258 		.name = "mt2701-cs42448-pcm-BT-in",
259 		.stream_name = "mt2701-cs42448-pcm-BT",
260 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
261 			    SND_SOC_DPCM_TRIGGER_POST},
262 		.dynamic = 1,
263 		.dpcm_capture = 1,
264 		SND_SOC_DAILINK_REG(fe_bt_in),
265 	},
266 	/* BE */
267 	[DAI_LINK_BE_I2S0] = {
268 		.name = "mt2701-cs42448-I2S0",
269 		.no_pcm = 1,
270 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
271 			 | SND_SOC_DAIFMT_GATED,
272 		.ops = &mt2701_cs42448_be_ops,
273 		.dpcm_playback = 1,
274 		.dpcm_capture = 1,
275 		SND_SOC_DAILINK_REG(be_i2s0),
276 	},
277 	[DAI_LINK_BE_I2S1] = {
278 		.name = "mt2701-cs42448-I2S1",
279 		.no_pcm = 1,
280 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
281 			 | SND_SOC_DAIFMT_GATED,
282 		.ops = &mt2701_cs42448_be_ops,
283 		.dpcm_playback = 1,
284 		.dpcm_capture = 1,
285 		SND_SOC_DAILINK_REG(be_i2s1),
286 	},
287 	[DAI_LINK_BE_I2S2] = {
288 		.name = "mt2701-cs42448-I2S2",
289 		.no_pcm = 1,
290 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
291 			 | SND_SOC_DAIFMT_GATED,
292 		.ops = &mt2701_cs42448_be_ops,
293 		.dpcm_playback = 1,
294 		.dpcm_capture = 1,
295 		SND_SOC_DAILINK_REG(be_i2s2),
296 	},
297 	[DAI_LINK_BE_I2S3] = {
298 		.name = "mt2701-cs42448-I2S3",
299 		.no_pcm = 1,
300 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
301 			 | SND_SOC_DAIFMT_GATED,
302 		.ops = &mt2701_cs42448_be_ops,
303 		.dpcm_playback = 1,
304 		.dpcm_capture = 1,
305 		SND_SOC_DAILINK_REG(be_i2s3),
306 	},
307 	[DAI_LINK_BE_MRG_BT] = {
308 		.name = "mt2701-cs42448-MRG-BT",
309 		.no_pcm = 1,
310 		.dpcm_playback = 1,
311 		.dpcm_capture = 1,
312 		SND_SOC_DAILINK_REG(be_mrg_bt),
313 	},
314 };
315 
316 static struct snd_soc_card mt2701_cs42448_soc_card = {
317 	.name = "mt2701-cs42448",
318 	.owner = THIS_MODULE,
319 	.dai_link = mt2701_cs42448_dai_links,
320 	.num_links = ARRAY_SIZE(mt2701_cs42448_dai_links),
321 	.controls = mt2701_cs42448_controls,
322 	.num_controls = ARRAY_SIZE(mt2701_cs42448_controls),
323 	.dapm_widgets = mt2701_cs42448_asoc_card_dapm_widgets,
324 	.num_dapm_widgets = ARRAY_SIZE(mt2701_cs42448_asoc_card_dapm_widgets),
325 };
326 
mt2701_cs42448_machine_probe(struct platform_device * pdev)327 static int mt2701_cs42448_machine_probe(struct platform_device *pdev)
328 {
329 	struct snd_soc_card *card = &mt2701_cs42448_soc_card;
330 	int ret;
331 	int i;
332 	struct device_node *platform_node, *codec_node, *codec_node_bt_mrg;
333 	struct mt2701_cs42448_private *priv =
334 		devm_kzalloc(&pdev->dev, sizeof(struct mt2701_cs42448_private),
335 			     GFP_KERNEL);
336 	struct device *dev = &pdev->dev;
337 	struct snd_soc_dai_link *dai_link;
338 
339 	if (!priv)
340 		return -ENOMEM;
341 
342 	platform_node = of_parse_phandle(pdev->dev.of_node,
343 					 "mediatek,platform", 0);
344 	if (!platform_node) {
345 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
346 		return -EINVAL;
347 	}
348 	for_each_card_prelinks(card, i, dai_link) {
349 		if (dai_link->platforms->name)
350 			continue;
351 		dai_link->platforms->of_node = platform_node;
352 	}
353 
354 	card->dev = dev;
355 
356 	codec_node = of_parse_phandle(pdev->dev.of_node,
357 				      "mediatek,audio-codec", 0);
358 	if (!codec_node) {
359 		dev_err(&pdev->dev,
360 			"Property 'audio-codec' missing or invalid\n");
361 		return -EINVAL;
362 	}
363 	for_each_card_prelinks(card, i, dai_link) {
364 		if (dai_link->codecs->name)
365 			continue;
366 		dai_link->codecs->of_node = codec_node;
367 	}
368 
369 	codec_node_bt_mrg = of_parse_phandle(pdev->dev.of_node,
370 					     "mediatek,audio-codec-bt-mrg", 0);
371 	if (!codec_node_bt_mrg) {
372 		dev_err(&pdev->dev,
373 			"Property 'audio-codec-bt-mrg' missing or invalid\n");
374 		return -EINVAL;
375 	}
376 	mt2701_cs42448_dai_links[DAI_LINK_BE_MRG_BT].codecs->of_node
377 							= codec_node_bt_mrg;
378 
379 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
380 	if (ret) {
381 		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
382 		return ret;
383 	}
384 
385 	priv->i2s1_in_mux_gpio_sel_1 =
386 		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio1", 0);
387 	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_1)) {
388 		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_1,
389 					"i2s1_in_mux_gpio_sel_1");
390 		if (ret)
391 			dev_warn(&pdev->dev, "%s devm_gpio_request fail %d\n",
392 				 __func__, ret);
393 		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_1, 0);
394 	}
395 
396 	priv->i2s1_in_mux_gpio_sel_2 =
397 		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio2", 0);
398 	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_2)) {
399 		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_2,
400 					"i2s1_in_mux_gpio_sel_2");
401 		if (ret)
402 			dev_warn(&pdev->dev, "%s devm_gpio_request fail2 %d\n",
403 				 __func__, ret);
404 		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_2, 0);
405 	}
406 	snd_soc_card_set_drvdata(card, priv);
407 
408 	ret = devm_snd_soc_register_card(&pdev->dev, card);
409 
410 	if (ret)
411 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
412 			__func__, ret);
413 	return ret;
414 }
415 
416 #ifdef CONFIG_OF
417 static const struct of_device_id mt2701_cs42448_machine_dt_match[] = {
418 	{.compatible = "mediatek,mt2701-cs42448-machine",},
419 	{}
420 };
421 MODULE_DEVICE_TABLE(of, mt2701_cs42448_machine_dt_match);
422 #endif
423 
424 static struct platform_driver mt2701_cs42448_machine = {
425 	.driver = {
426 		.name = "mt2701-cs42448",
427 		   #ifdef CONFIG_OF
428 		   .of_match_table = mt2701_cs42448_machine_dt_match,
429 		   #endif
430 	},
431 	.probe = mt2701_cs42448_machine_probe,
432 };
433 
434 module_platform_driver(mt2701_cs42448_machine);
435 
436 /* Module information */
437 MODULE_DESCRIPTION("MT2701 CS42448 ALSA SoC machine driver");
438 MODULE_AUTHOR("Ir Lian <ir.lian@mediatek.com>");
439 MODULE_LICENSE("GPL v2");
440 MODULE_ALIAS("mt2701 cs42448 soc card");
441