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 
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 
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 
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 
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 = substream->private_data;
131 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
132 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
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 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 static struct snd_soc_dai_link mt2701_cs42448_dai_links[] = {
167 	/* FE */
168 	[DAI_LINK_FE_MULTI_CH_OUT] = {
169 		.name = "mt2701-cs42448-multi-ch-out",
170 		.stream_name = "mt2701-cs42448-multi-ch-out",
171 		.cpu_dai_name = "PCM_multi",
172 		.codec_name = "snd-soc-dummy",
173 		.codec_dai_name = "snd-soc-dummy-dai",
174 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
175 			    SND_SOC_DPCM_TRIGGER_POST},
176 		.ops = &mt2701_cs42448_48k_fe_ops,
177 		.dynamic = 1,
178 		.dpcm_playback = 1,
179 	},
180 	[DAI_LINK_FE_PCM0_IN] = {
181 		.name = "mt2701-cs42448-pcm0",
182 		.stream_name = "mt2701-cs42448-pcm0-data-UL",
183 		.cpu_dai_name = "PCM0",
184 		.codec_name = "snd-soc-dummy",
185 		.codec_dai_name = "snd-soc-dummy-dai",
186 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
187 			    SND_SOC_DPCM_TRIGGER_POST},
188 		.ops = &mt2701_cs42448_48k_fe_ops,
189 		.dynamic = 1,
190 		.dpcm_capture = 1,
191 	},
192 	[DAI_LINK_FE_PCM1_IN] = {
193 		.name = "mt2701-cs42448-pcm1-data-UL",
194 		.stream_name = "mt2701-cs42448-pcm1-data-UL",
195 		.cpu_dai_name = "PCM1",
196 		.codec_name = "snd-soc-dummy",
197 		.codec_dai_name = "snd-soc-dummy-dai",
198 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
199 			    SND_SOC_DPCM_TRIGGER_POST},
200 		.ops = &mt2701_cs42448_48k_fe_ops,
201 		.dynamic = 1,
202 		.dpcm_capture = 1,
203 	},
204 	[DAI_LINK_FE_BT_OUT] = {
205 		.name = "mt2701-cs42448-pcm-BT-out",
206 		.stream_name = "mt2701-cs42448-pcm-BT",
207 		.cpu_dai_name = "PCM_BT_DL",
208 		.codec_name = "snd-soc-dummy",
209 		.codec_dai_name = "snd-soc-dummy-dai",
210 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
211 			    SND_SOC_DPCM_TRIGGER_POST},
212 		.dynamic = 1,
213 		.dpcm_playback = 1,
214 	},
215 	[DAI_LINK_FE_BT_IN] = {
216 		.name = "mt2701-cs42448-pcm-BT-in",
217 		.stream_name = "mt2701-cs42448-pcm-BT",
218 		.cpu_dai_name = "PCM_BT_UL",
219 		.codec_name = "snd-soc-dummy",
220 		.codec_dai_name = "snd-soc-dummy-dai",
221 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
222 			    SND_SOC_DPCM_TRIGGER_POST},
223 		.dynamic = 1,
224 		.dpcm_capture = 1,
225 	},
226 	/* BE */
227 	[DAI_LINK_BE_I2S0] = {
228 		.name = "mt2701-cs42448-I2S0",
229 		.cpu_dai_name = "I2S0",
230 		.no_pcm = 1,
231 		.codec_dai_name = "cs42448",
232 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
233 			 | SND_SOC_DAIFMT_GATED,
234 		.ops = &mt2701_cs42448_be_ops,
235 		.dpcm_playback = 1,
236 		.dpcm_capture = 1,
237 	},
238 	[DAI_LINK_BE_I2S1] = {
239 		.name = "mt2701-cs42448-I2S1",
240 		.cpu_dai_name = "I2S1",
241 		.no_pcm = 1,
242 		.codec_dai_name = "cs42448",
243 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
244 			 | SND_SOC_DAIFMT_GATED,
245 		.ops = &mt2701_cs42448_be_ops,
246 		.dpcm_playback = 1,
247 		.dpcm_capture = 1,
248 	},
249 	[DAI_LINK_BE_I2S2] = {
250 		.name = "mt2701-cs42448-I2S2",
251 		.cpu_dai_name = "I2S2",
252 		.no_pcm = 1,
253 		.codec_dai_name = "cs42448",
254 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
255 			 | SND_SOC_DAIFMT_GATED,
256 		.ops = &mt2701_cs42448_be_ops,
257 		.dpcm_playback = 1,
258 		.dpcm_capture = 1,
259 	},
260 	[DAI_LINK_BE_I2S3] = {
261 		.name = "mt2701-cs42448-I2S3",
262 		.cpu_dai_name = "I2S3",
263 		.no_pcm = 1,
264 		.codec_dai_name = "cs42448",
265 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
266 			 | SND_SOC_DAIFMT_GATED,
267 		.ops = &mt2701_cs42448_be_ops,
268 		.dpcm_playback = 1,
269 		.dpcm_capture = 1,
270 	},
271 	[DAI_LINK_BE_MRG_BT] = {
272 		.name = "mt2701-cs42448-MRG-BT",
273 		.cpu_dai_name = "MRG BT",
274 		.no_pcm = 1,
275 		.codec_dai_name = "bt-sco-pcm-wb",
276 		.dpcm_playback = 1,
277 		.dpcm_capture = 1,
278 	},
279 };
280 
281 static struct snd_soc_card mt2701_cs42448_soc_card = {
282 	.name = "mt2701-cs42448",
283 	.owner = THIS_MODULE,
284 	.dai_link = mt2701_cs42448_dai_links,
285 	.num_links = ARRAY_SIZE(mt2701_cs42448_dai_links),
286 	.controls = mt2701_cs42448_controls,
287 	.num_controls = ARRAY_SIZE(mt2701_cs42448_controls),
288 	.dapm_widgets = mt2701_cs42448_asoc_card_dapm_widgets,
289 	.num_dapm_widgets = ARRAY_SIZE(mt2701_cs42448_asoc_card_dapm_widgets),
290 };
291 
292 static int mt2701_cs42448_machine_probe(struct platform_device *pdev)
293 {
294 	struct snd_soc_card *card = &mt2701_cs42448_soc_card;
295 	int ret;
296 	int i;
297 	struct device_node *platform_node, *codec_node, *codec_node_bt_mrg;
298 	struct mt2701_cs42448_private *priv =
299 		devm_kzalloc(&pdev->dev, sizeof(struct mt2701_cs42448_private),
300 			     GFP_KERNEL);
301 	struct device *dev = &pdev->dev;
302 
303 	if (!priv)
304 		return -ENOMEM;
305 
306 	platform_node = of_parse_phandle(pdev->dev.of_node,
307 					 "mediatek,platform", 0);
308 	if (!platform_node) {
309 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
310 		return -EINVAL;
311 	}
312 	for (i = 0; i < card->num_links; i++) {
313 		if (mt2701_cs42448_dai_links[i].platform_name)
314 			continue;
315 		mt2701_cs42448_dai_links[i].platform_of_node = platform_node;
316 	}
317 
318 	card->dev = dev;
319 
320 	codec_node = of_parse_phandle(pdev->dev.of_node,
321 				      "mediatek,audio-codec", 0);
322 	if (!codec_node) {
323 		dev_err(&pdev->dev,
324 			"Property 'audio-codec' missing or invalid\n");
325 		return -EINVAL;
326 	}
327 	for (i = 0; i < card->num_links; i++) {
328 		if (mt2701_cs42448_dai_links[i].codec_name)
329 			continue;
330 		mt2701_cs42448_dai_links[i].codec_of_node = codec_node;
331 	}
332 
333 	codec_node_bt_mrg = of_parse_phandle(pdev->dev.of_node,
334 					     "mediatek,audio-codec-bt-mrg", 0);
335 	if (!codec_node_bt_mrg) {
336 		dev_err(&pdev->dev,
337 			"Property 'audio-codec-bt-mrg' missing or invalid\n");
338 		return -EINVAL;
339 	}
340 	mt2701_cs42448_dai_links[DAI_LINK_BE_MRG_BT].codec_of_node
341 							= codec_node_bt_mrg;
342 
343 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
344 	if (ret) {
345 		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
346 		return ret;
347 	}
348 
349 	priv->i2s1_in_mux_gpio_sel_1 =
350 		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio1", 0);
351 	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_1)) {
352 		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_1,
353 					"i2s1_in_mux_gpio_sel_1");
354 		if (ret)
355 			dev_warn(&pdev->dev, "%s devm_gpio_request fail %d\n",
356 				 __func__, ret);
357 		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_1, 0);
358 	}
359 
360 	priv->i2s1_in_mux_gpio_sel_2 =
361 		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio2", 0);
362 	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_2)) {
363 		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_2,
364 					"i2s1_in_mux_gpio_sel_2");
365 		if (ret)
366 			dev_warn(&pdev->dev, "%s devm_gpio_request fail2 %d\n",
367 				 __func__, ret);
368 		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_2, 0);
369 	}
370 	snd_soc_card_set_drvdata(card, priv);
371 
372 	ret = devm_snd_soc_register_card(&pdev->dev, card);
373 
374 	if (ret)
375 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
376 			__func__, ret);
377 	return ret;
378 }
379 
380 #ifdef CONFIG_OF
381 static const struct of_device_id mt2701_cs42448_machine_dt_match[] = {
382 	{.compatible = "mediatek,mt2701-cs42448-machine",},
383 	{}
384 };
385 #endif
386 
387 static struct platform_driver mt2701_cs42448_machine = {
388 	.driver = {
389 		.name = "mt2701-cs42448",
390 		   #ifdef CONFIG_OF
391 		   .of_match_table = mt2701_cs42448_machine_dt_match,
392 		   #endif
393 	},
394 	.probe = mt2701_cs42448_machine_probe,
395 };
396 
397 module_platform_driver(mt2701_cs42448_machine);
398 
399 /* Module information */
400 MODULE_DESCRIPTION("MT2701 CS42448 ALSA SoC machine driver");
401 MODULE_AUTHOR("Ir Lian <ir.lian@mediatek.com>");
402 MODULE_LICENSE("GPL v2");
403 MODULE_ALIAS("mt2701 cs42448 soc card");
404