1 /*
2  * mt8173-rt5650.c  --  MT8173 machine driver with RT5650 codecs
3  *
4  * Copyright (c) 2016 MediaTek Inc.
5  * Author: Koro Chen <koro.chen@mediatek.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 and
9  * only version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  */
16 
17 #include <linux/module.h>
18 #include <linux/gpio.h>
19 #include <linux/of_gpio.h>
20 #include <sound/soc.h>
21 #include <sound/jack.h>
22 #include "../../codecs/rt5645.h"
23 
24 #define MCLK_FOR_CODECS		12288000
25 
26 enum mt8173_rt5650_mclk {
27 	MT8173_RT5650_MCLK_EXTERNAL = 0,
28 	MT8173_RT5650_MCLK_INTERNAL,
29 };
30 
31 struct mt8173_rt5650_platform_data {
32 	enum mt8173_rt5650_mclk pll_from;
33 	/* 0 = external oscillator; 1 = internal source from mt8173 */
34 };
35 
36 static struct mt8173_rt5650_platform_data mt8173_rt5650_priv = {
37 	.pll_from = MT8173_RT5650_MCLK_EXTERNAL,
38 };
39 
40 static const struct snd_soc_dapm_widget mt8173_rt5650_widgets[] = {
41 	SND_SOC_DAPM_SPK("Speaker", NULL),
42 	SND_SOC_DAPM_MIC("Int Mic", NULL),
43 	SND_SOC_DAPM_HP("Headphone", NULL),
44 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
45 };
46 
47 static const struct snd_soc_dapm_route mt8173_rt5650_routes[] = {
48 	{"Speaker", NULL, "SPOL"},
49 	{"Speaker", NULL, "SPOR"},
50 	{"DMIC L1", NULL, "Int Mic"},
51 	{"DMIC R1", NULL, "Int Mic"},
52 	{"Headphone", NULL, "HPOL"},
53 	{"Headphone", NULL, "HPOR"},
54 	{"IN1P", NULL, "Headset Mic"},
55 	{"IN1N", NULL, "Headset Mic"},
56 };
57 
58 static const struct snd_kcontrol_new mt8173_rt5650_controls[] = {
59 	SOC_DAPM_PIN_SWITCH("Speaker"),
60 	SOC_DAPM_PIN_SWITCH("Int Mic"),
61 	SOC_DAPM_PIN_SWITCH("Headphone"),
62 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
63 };
64 
65 static int mt8173_rt5650_hw_params(struct snd_pcm_substream *substream,
66 				   struct snd_pcm_hw_params *params)
67 {
68 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
69 	unsigned int mclk_clock;
70 	int i, ret;
71 
72 	switch (mt8173_rt5650_priv.pll_from) {
73 	case MT8173_RT5650_MCLK_EXTERNAL:
74 		/* mclk = 12.288M */
75 		mclk_clock = MCLK_FOR_CODECS;
76 		break;
77 	case MT8173_RT5650_MCLK_INTERNAL:
78 		/* mclk = sampling rate*256 */
79 		mclk_clock = params_rate(params) * 256;
80 		break;
81 	default:
82 		/* mclk = 12.288M */
83 		mclk_clock = MCLK_FOR_CODECS;
84 		break;
85 	}
86 
87 	for (i = 0; i < rtd->num_codecs; i++) {
88 		struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
89 
90 		/* pll from mclk */
91 		ret = snd_soc_dai_set_pll(codec_dai, 0, 0, mclk_clock,
92 					  params_rate(params) * 512);
93 		if (ret)
94 			return ret;
95 
96 		/* sysclk from pll */
97 		ret = snd_soc_dai_set_sysclk(codec_dai, 1,
98 					     params_rate(params) * 512,
99 					     SND_SOC_CLOCK_IN);
100 		if (ret)
101 			return ret;
102 	}
103 	return 0;
104 }
105 
106 static const struct snd_soc_ops mt8173_rt5650_ops = {
107 	.hw_params = mt8173_rt5650_hw_params,
108 };
109 
110 static struct snd_soc_jack mt8173_rt5650_jack;
111 
112 static int mt8173_rt5650_init(struct snd_soc_pcm_runtime *runtime)
113 {
114 	struct snd_soc_card *card = runtime->card;
115 	struct snd_soc_codec *codec = runtime->codec_dais[0]->codec;
116 	const char *codec_capture_dai = runtime->codec_dais[1]->name;
117 	int ret;
118 
119 	rt5645_sel_asrc_clk_src(codec,
120 				RT5645_DA_STEREO_FILTER,
121 				RT5645_CLK_SEL_I2S1_ASRC);
122 
123 	if (!strcmp(codec_capture_dai, "rt5645-aif1")) {
124 		rt5645_sel_asrc_clk_src(codec,
125 					RT5645_AD_STEREO_FILTER,
126 					RT5645_CLK_SEL_I2S1_ASRC);
127 	} else if (!strcmp(codec_capture_dai, "rt5645-aif2")) {
128 		rt5645_sel_asrc_clk_src(codec,
129 					RT5645_AD_STEREO_FILTER,
130 					RT5645_CLK_SEL_I2S2_ASRC);
131 	} else {
132 		dev_warn(card->dev,
133 			 "Only one dai codec found in DTS, enabled rt5645 AD filter\n");
134 		rt5645_sel_asrc_clk_src(codec,
135 					RT5645_AD_STEREO_FILTER,
136 					RT5645_CLK_SEL_I2S1_ASRC);
137 	}
138 
139 	/* enable jack detection */
140 	ret = snd_soc_card_jack_new(card, "Headset Jack",
141 				    SND_JACK_HEADPHONE | SND_JACK_MICROPHONE |
142 				    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
143 				    SND_JACK_BTN_2 | SND_JACK_BTN_3,
144 				    &mt8173_rt5650_jack, NULL, 0);
145 	if (ret) {
146 		dev_err(card->dev, "Can't new Headset Jack %d\n", ret);
147 		return ret;
148 	}
149 
150 	return rt5645_set_jack_detect(codec,
151 				      &mt8173_rt5650_jack,
152 				      &mt8173_rt5650_jack,
153 				      &mt8173_rt5650_jack);
154 }
155 
156 static struct snd_soc_dai_link_component mt8173_rt5650_codecs[] = {
157 	{
158 		/* Playback */
159 		.dai_name = "rt5645-aif1",
160 	},
161 	{
162 		/* Capture */
163 		.dai_name = "rt5645-aif1",
164 	},
165 };
166 
167 enum {
168 	DAI_LINK_PLAYBACK,
169 	DAI_LINK_CAPTURE,
170 	DAI_LINK_HDMI,
171 	DAI_LINK_CODEC_I2S,
172 	DAI_LINK_HDMI_I2S,
173 };
174 
175 /* Digital audio interface glue - connects codec <---> CPU */
176 static struct snd_soc_dai_link mt8173_rt5650_dais[] = {
177 	/* Front End DAI links */
178 	[DAI_LINK_PLAYBACK] = {
179 		.name = "rt5650 Playback",
180 		.stream_name = "rt5650 Playback",
181 		.cpu_dai_name = "DL1",
182 		.codec_name = "snd-soc-dummy",
183 		.codec_dai_name = "snd-soc-dummy-dai",
184 		.trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
185 		.dynamic = 1,
186 		.dpcm_playback = 1,
187 	},
188 	[DAI_LINK_CAPTURE] = {
189 		.name = "rt5650 Capture",
190 		.stream_name = "rt5650 Capture",
191 		.cpu_dai_name = "VUL",
192 		.codec_name = "snd-soc-dummy",
193 		.codec_dai_name = "snd-soc-dummy-dai",
194 		.trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
195 		.dynamic = 1,
196 		.dpcm_capture = 1,
197 	},
198 	[DAI_LINK_HDMI] = {
199 		.name = "HDMI",
200 		.stream_name = "HDMI PCM",
201 		.cpu_dai_name = "HDMI",
202 		.codec_name = "snd-soc-dummy",
203 		.codec_dai_name = "snd-soc-dummy-dai",
204 		.trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
205 		.dynamic = 1,
206 		.dpcm_playback = 1,
207 	},
208 	/* Back End DAI links */
209 	[DAI_LINK_CODEC_I2S] = {
210 		.name = "Codec",
211 		.cpu_dai_name = "I2S",
212 		.no_pcm = 1,
213 		.codecs = mt8173_rt5650_codecs,
214 		.num_codecs = 2,
215 		.init = mt8173_rt5650_init,
216 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
217 			   SND_SOC_DAIFMT_CBS_CFS,
218 		.ops = &mt8173_rt5650_ops,
219 		.ignore_pmdown_time = 1,
220 		.dpcm_playback = 1,
221 		.dpcm_capture = 1,
222 	},
223 	[DAI_LINK_HDMI_I2S] = {
224 		.name = "HDMI BE",
225 		.cpu_dai_name = "HDMIO",
226 		.no_pcm = 1,
227 		.codec_dai_name = "i2s-hifi",
228 		.dpcm_playback = 1,
229 	},
230 };
231 
232 static struct snd_soc_card mt8173_rt5650_card = {
233 	.name = "mtk-rt5650",
234 	.owner = THIS_MODULE,
235 	.dai_link = mt8173_rt5650_dais,
236 	.num_links = ARRAY_SIZE(mt8173_rt5650_dais),
237 	.controls = mt8173_rt5650_controls,
238 	.num_controls = ARRAY_SIZE(mt8173_rt5650_controls),
239 	.dapm_widgets = mt8173_rt5650_widgets,
240 	.num_dapm_widgets = ARRAY_SIZE(mt8173_rt5650_widgets),
241 	.dapm_routes = mt8173_rt5650_routes,
242 	.num_dapm_routes = ARRAY_SIZE(mt8173_rt5650_routes),
243 };
244 
245 static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
246 {
247 	struct snd_soc_card *card = &mt8173_rt5650_card;
248 	struct device_node *platform_node;
249 	struct device_node *np;
250 	const char *codec_capture_dai;
251 	int i, ret;
252 
253 	platform_node = of_parse_phandle(pdev->dev.of_node,
254 					 "mediatek,platform", 0);
255 	if (!platform_node) {
256 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
257 		return -EINVAL;
258 	}
259 
260 	for (i = 0; i < card->num_links; i++) {
261 		if (mt8173_rt5650_dais[i].platform_name)
262 			continue;
263 		mt8173_rt5650_dais[i].platform_of_node = platform_node;
264 	}
265 
266 	mt8173_rt5650_codecs[0].of_node =
267 		of_parse_phandle(pdev->dev.of_node, "mediatek,audio-codec", 0);
268 	if (!mt8173_rt5650_codecs[0].of_node) {
269 		dev_err(&pdev->dev,
270 			"Property 'audio-codec' missing or invalid\n");
271 		return -EINVAL;
272 	}
273 	mt8173_rt5650_codecs[1].of_node = mt8173_rt5650_codecs[0].of_node;
274 
275 	np = of_get_child_by_name(pdev->dev.of_node, "codec-capture");
276 	if (np) {
277 		ret = snd_soc_of_get_dai_name(np, &codec_capture_dai);
278 		of_node_put(np);
279 		if (ret < 0) {
280 			dev_err(&pdev->dev,
281 				"%s codec_capture_dai name fail %d\n",
282 				__func__, ret);
283 			return ret;
284 		}
285 		mt8173_rt5650_codecs[1].dai_name = codec_capture_dai;
286 	}
287 
288 	if (device_property_present(&pdev->dev, "mediatek,mclk")) {
289 		ret = device_property_read_u32(&pdev->dev,
290 					       "mediatek,mclk",
291 					       &mt8173_rt5650_priv.pll_from);
292 		if (ret) {
293 			dev_err(&pdev->dev,
294 				"%s snd_soc_register_card fail %d\n",
295 				__func__, ret);
296 		}
297 	}
298 
299 	mt8173_rt5650_dais[DAI_LINK_HDMI_I2S].codec_of_node =
300 		of_parse_phandle(pdev->dev.of_node, "mediatek,audio-codec", 1);
301 	if (!mt8173_rt5650_dais[DAI_LINK_HDMI_I2S].codec_of_node) {
302 		dev_err(&pdev->dev,
303 			"Property 'audio-codec' missing or invalid\n");
304 		return -EINVAL;
305 	}
306 	card->dev = &pdev->dev;
307 
308 	ret = devm_snd_soc_register_card(&pdev->dev, card);
309 	if (ret)
310 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
311 			__func__, ret);
312 	return ret;
313 }
314 
315 static const struct of_device_id mt8173_rt5650_dt_match[] = {
316 	{ .compatible = "mediatek,mt8173-rt5650", },
317 	{ }
318 };
319 MODULE_DEVICE_TABLE(of, mt8173_rt5650_dt_match);
320 
321 static struct platform_driver mt8173_rt5650_driver = {
322 	.driver = {
323 		   .name = "mtk-rt5650",
324 		   .of_match_table = mt8173_rt5650_dt_match,
325 #ifdef CONFIG_PM
326 		   .pm = &snd_soc_pm_ops,
327 #endif
328 	},
329 	.probe = mt8173_rt5650_dev_probe,
330 };
331 
332 module_platform_driver(mt8173_rt5650_driver);
333 
334 /* Module information */
335 MODULE_DESCRIPTION("MT8173 RT5650 SoC machine driver");
336 MODULE_AUTHOR("Koro Chen <koro.chen@mediatek.com>");
337 MODULE_LICENSE("GPL v2");
338 MODULE_ALIAS("platform:mtk-rt5650");
339 
340