1 /*
2  *  cht-bsw-nau8824.c - ASoc Machine driver for Intel Cherryview-based
3  *          platforms Cherrytrail and Braswell, with nau8824 codec.
4  *
5  *  Copyright (C) 2018 Intel Corp
6  *  Copyright (C) 2018 Nuvoton Technology Corp
7  *
8  *  Author: Wang, Joseph C <joequant@gmail.com>
9  *  Co-author: John Hsu <KCHSU0@nuvoton.com>
10  *  This file is based on cht_bsw_rt5672.c and cht-bsw-max98090.c
11  *
12  *  This program is free software; you can redistribute it and/or modify
13  *  it under the terms of the GNU General Public License as published by
14  *  the Free Software Foundation; version 2 of the License.
15  *
16  *  This program is distributed in the hope that it will be useful, but
17  *  WITHOUT ANY WARRANTY; without even the implied warranty of
18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19  *  General Public License for more details.
20  */
21 
22 #include <linux/module.h>
23 #include <linux/platform_device.h>
24 #include <linux/slab.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28 #include <sound/soc-acpi.h>
29 #include <sound/jack.h>
30 #include <linux/input.h>
31 #include "../atom/sst-atom-controls.h"
32 #include "../../codecs/nau8824.h"
33 
34 struct cht_mc_private {
35 	struct snd_soc_jack jack;
36 };
37 
38 static struct snd_soc_jack_pin cht_bsw_jack_pins[] = {
39 	{
40 		.pin = "Headphone",
41 		.mask = SND_JACK_HEADPHONE,
42 	},
43 	{
44 		.pin = "Headset Mic",
45 		.mask = SND_JACK_MICROPHONE,
46 	},
47 };
48 
49 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
50 	SND_SOC_DAPM_HP("Headphone", NULL),
51 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
52 	SND_SOC_DAPM_MIC("Int Mic", NULL),
53 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
54 };
55 
56 static const struct snd_soc_dapm_route cht_audio_map[] = {
57 	{"Ext Spk", NULL, "SPKOUTL"},
58 	{"Ext Spk", NULL, "SPKOUTR"},
59 	{"Headphone", NULL, "HPOL"},
60 	{"Headphone", NULL, "HPOR"},
61 	{"MIC1", NULL, "Int Mic"},
62 	{"MIC2", NULL, "Int Mic"},
63 	{"HSMIC1", NULL, "Headset Mic"},
64 	{"HSMIC2", NULL, "Headset Mic"},
65 	{"Playback", NULL, "ssp2 Tx"},
66 	{"ssp2 Tx", NULL, "codec_out0"},
67 	{"ssp2 Tx", NULL, "codec_out1"},
68 	{"codec_in0", NULL, "ssp2 Rx" },
69 	{"codec_in1", NULL, "ssp2 Rx" },
70 	{"ssp2 Rx", NULL, "Capture"},
71 };
72 
73 static const struct snd_kcontrol_new cht_mc_controls[] = {
74 	SOC_DAPM_PIN_SWITCH("Headphone"),
75 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
76 	SOC_DAPM_PIN_SWITCH("Int Mic"),
77 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
78 };
79 
80 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
81 	struct snd_pcm_hw_params *params)
82 {
83 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
84 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
85 	int ret;
86 
87 	ret = snd_soc_dai_set_sysclk(codec_dai, NAU8824_CLK_FLL_FS, 0,
88 		SND_SOC_CLOCK_IN);
89 	if (ret < 0) {
90 		dev_err(codec_dai->dev, "can't set FS clock %d\n", ret);
91 		return ret;
92 	}
93 	ret = snd_soc_dai_set_pll(codec_dai, 0, 0, params_rate(params),
94 		params_rate(params) * 256);
95 	if (ret < 0) {
96 		dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
97 		return ret;
98 	}
99 
100 	return 0;
101 }
102 
103 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
104 {
105 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
106 	struct snd_soc_jack *jack = &ctx->jack;
107 	struct snd_soc_dai *codec_dai = runtime->codec_dai;
108 	struct snd_soc_component *component = codec_dai->component;
109 	int ret, jack_type;
110 
111 	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
112 	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xf, 0x1, 4, 24);
113 	if (ret < 0) {
114 		dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
115 		return ret;
116 	}
117 
118 	/* NAU88L24 supports 4 butons headset detection
119 	 * KEY_MEDIA
120 	 * KEY_VOICECOMMAND
121 	 * KEY_VOLUMEUP
122 	 * KEY_VOLUMEDOWN
123 	 */
124 	jack_type = SND_JACK_HEADSET | SND_JACK_BTN_0 | SND_JACK_BTN_1 |
125 		SND_JACK_BTN_2 | SND_JACK_BTN_3;
126 	ret = snd_soc_card_jack_new(runtime->card, "Headset", jack_type, jack,
127 		cht_bsw_jack_pins, ARRAY_SIZE(cht_bsw_jack_pins));
128 	if (ret) {
129 		dev_err(runtime->dev,
130 			"Headset Jack creation failed %d\n", ret);
131 		return ret;
132 	}
133 	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_MEDIA);
134 	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
135 	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
136 	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
137 
138 	nau8824_enable_jack_detect(component, jack);
139 
140 	return ret;
141 }
142 
143 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
144 	struct snd_pcm_hw_params *params)
145 {
146 	struct snd_interval *rate = hw_param_interval(params,
147 		SNDRV_PCM_HW_PARAM_RATE);
148 	struct snd_interval *channels = hw_param_interval(params,
149 		SNDRV_PCM_HW_PARAM_CHANNELS);
150 	struct snd_mask *fmt =
151 		hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
152 
153 	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
154 	rate->min = rate->max = 48000;
155 	channels->min = channels->max = 2;
156 
157 	/* set SSP2 to 24-bit */
158 	snd_mask_none(fmt);
159 	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
160 
161 	return 0;
162 }
163 
164 static int cht_aif1_startup(struct snd_pcm_substream *substream)
165 {
166 	return snd_pcm_hw_constraint_single(substream->runtime,
167 		SNDRV_PCM_HW_PARAM_RATE, 48000);
168 }
169 
170 static const struct snd_soc_ops cht_aif1_ops = {
171 	.startup = cht_aif1_startup,
172 };
173 
174 static const struct snd_soc_ops cht_be_ssp2_ops = {
175 	.hw_params = cht_aif1_hw_params,
176 };
177 
178 static struct snd_soc_dai_link cht_dailink[] = {
179 	/* Front End DAI links */
180 	[MERR_DPCM_AUDIO] = {
181 		.name = "Audio Port",
182 		.stream_name = "Audio",
183 		.cpu_dai_name = "media-cpu-dai",
184 		.codec_dai_name = "snd-soc-dummy-dai",
185 		.codec_name = "snd-soc-dummy",
186 		.platform_name = "sst-mfld-platform",
187 		.nonatomic = true,
188 		.dynamic = 1,
189 		.dpcm_playback = 1,
190 		.dpcm_capture = 1,
191 		.ops = &cht_aif1_ops,
192 	},
193 	[MERR_DPCM_DEEP_BUFFER] = {
194 		.name = "Deep-Buffer Audio Port",
195 		.stream_name = "Deep-Buffer Audio",
196 		.cpu_dai_name = "deepbuffer-cpu-dai",
197 		.codec_dai_name = "snd-soc-dummy-dai",
198 		.codec_name = "snd-soc-dummy",
199 		.platform_name = "sst-mfld-platform",
200 		.nonatomic = true,
201 		.dynamic = 1,
202 		.dpcm_playback = 1,
203 		.ops = &cht_aif1_ops,
204 	},
205 	[MERR_DPCM_COMPR] = {
206 		.name = "Compressed Port",
207 		.stream_name = "Compress",
208 		.cpu_dai_name = "compress-cpu-dai",
209 		.codec_dai_name = "snd-soc-dummy-dai",
210 		.codec_name = "snd-soc-dummy",
211 		.platform_name = "sst-mfld-platform",
212 	},
213 	/* Back End DAI links */
214 	{
215 		/* SSP2 - Codec */
216 		.name = "SSP2-Codec",
217 		.id = 1,
218 		.cpu_dai_name = "ssp2-port",
219 		.platform_name = "sst-mfld-platform",
220 		.no_pcm = 1,
221 		.codec_dai_name = NAU8824_CODEC_DAI,
222 		.codec_name = "i2c-10508824:00",
223 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
224 			| SND_SOC_DAIFMT_CBS_CFS,
225 		.init = cht_codec_init,
226 		.be_hw_params_fixup = cht_codec_fixup,
227 		.dpcm_playback = 1,
228 		.dpcm_capture = 1,
229 		.ops = &cht_be_ssp2_ops,
230 	},
231 };
232 
233 /* SoC card */
234 static struct snd_soc_card snd_soc_card_cht = {
235 	.name = "chtnau8824",
236 	.owner = THIS_MODULE,
237 	.dai_link = cht_dailink,
238 	.num_links = ARRAY_SIZE(cht_dailink),
239 	.dapm_widgets = cht_dapm_widgets,
240 	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
241 	.dapm_routes = cht_audio_map,
242 	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
243 	.controls = cht_mc_controls,
244 	.num_controls = ARRAY_SIZE(cht_mc_controls),
245 };
246 
247 static int snd_cht_mc_probe(struct platform_device *pdev)
248 {
249 	struct cht_mc_private *drv;
250 	struct snd_soc_acpi_mach *mach;
251 	const char *platform_name;
252 	int ret_val;
253 
254 	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
255 	if (!drv)
256 		return -ENOMEM;
257 	snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
258 
259 	/* override plaform name, if required */
260 	mach = (&pdev->dev)->platform_data;
261 	platform_name = mach->mach_params.platform;
262 
263 	ret_val = snd_soc_fixup_dai_links_platform_name(&snd_soc_card_cht,
264 							platform_name);
265 	if (ret_val)
266 		return ret_val;
267 
268 	/* register the soc card */
269 	snd_soc_card_cht.dev = &pdev->dev;
270 	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
271 	if (ret_val) {
272 		dev_err(&pdev->dev,
273 			"snd_soc_register_card failed %d\n", ret_val);
274 		return ret_val;
275 	}
276 	platform_set_drvdata(pdev, &snd_soc_card_cht);
277 
278 	return ret_val;
279 }
280 
281 static struct platform_driver snd_cht_mc_driver = {
282 	.driver = {
283 		.name = "cht-bsw-nau8824",
284 	},
285 	.probe = snd_cht_mc_probe,
286 };
287 
288 module_platform_driver(snd_cht_mc_driver);
289 
290 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
291 MODULE_AUTHOR("Wang, Joseph C <joequant@gmail.com>");
292 MODULE_AUTHOR("John Hsu <KCHSU0@nuvoton.com>");
293 MODULE_LICENSE("GPL v2");
294 MODULE_ALIAS("platform:cht-bsw-nau8824");
295