1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *  bytcht_nocodec.c - ASoc Machine driver for MinnowBoard Max and Up
4 *  to make I2S signals observable on the Low-Speed connector. Audio codec
5 *  is not managed by ASoC/DAPM
6 *
7 *  Copyright (C) 2015-2017 Intel Corp
8 *
9 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 *
11 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 */
13
14#include <linux/module.h>
15#include <sound/pcm.h>
16#include <sound/pcm_params.h>
17#include <sound/soc.h>
18#include "../atom/sst-atom-controls.h"
19
20static const struct snd_soc_dapm_widget widgets[] = {
21	SND_SOC_DAPM_MIC("Mic", NULL),
22	SND_SOC_DAPM_SPK("Speaker", NULL),
23};
24
25static const struct snd_kcontrol_new controls[] = {
26	SOC_DAPM_PIN_SWITCH("Mic"),
27	SOC_DAPM_PIN_SWITCH("Speaker"),
28};
29
30static const struct snd_soc_dapm_route audio_map[] = {
31	{"ssp2 Tx", NULL, "codec_out0"},
32	{"ssp2 Tx", NULL, "codec_out1"},
33	{"codec_in0", NULL, "ssp2 Rx"},
34	{"codec_in1", NULL, "ssp2 Rx"},
35
36	{"ssp2 Rx", NULL, "Mic"},
37	{"Speaker", NULL, "ssp2 Tx"},
38};
39
40static int codec_fixup(struct snd_soc_pcm_runtime *rtd,
41			    struct snd_pcm_hw_params *params)
42{
43	struct snd_interval *rate = hw_param_interval(params,
44			SNDRV_PCM_HW_PARAM_RATE);
45	struct snd_interval *channels = hw_param_interval(params,
46						SNDRV_PCM_HW_PARAM_CHANNELS);
47	int ret;
48
49	/* The DSP will convert the FE rate to 48k, stereo, 24bits */
50	rate->min = rate->max = 48000;
51	channels->min = channels->max = 2;
52
53	/* set SSP2 to 24-bit */
54	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
55
56	/*
57	 * Default mode for SSP configuration is TDM 4 slot, override config
58	 * with explicit setting to I2S 2ch 24-bit. The word length is set with
59	 * dai_set_tdm_slot() since there is no other API exposed
60	 */
61	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0),
62				  SND_SOC_DAIFMT_I2S     |
63				  SND_SOC_DAIFMT_NB_NF   |
64				  SND_SOC_DAIFMT_BP_FP);
65
66	if (ret < 0) {
67		dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);
68		return ret;
69	}
70
71	ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2, 24);
72	if (ret < 0) {
73		dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);
74		return ret;
75	}
76
77	return 0;
78}
79
80static const unsigned int rates_48000[] = {
81	48000,
82};
83
84static const struct snd_pcm_hw_constraint_list constraints_48000 = {
85	.count = ARRAY_SIZE(rates_48000),
86	.list  = rates_48000,
87};
88
89static int aif1_startup(struct snd_pcm_substream *substream)
90{
91	return snd_pcm_hw_constraint_list(substream->runtime, 0,
92			SNDRV_PCM_HW_PARAM_RATE,
93			&constraints_48000);
94}
95
96static const struct snd_soc_ops aif1_ops = {
97	.startup = aif1_startup,
98};
99
100SND_SOC_DAILINK_DEF(dummy,
101	DAILINK_COMP_ARRAY(COMP_DUMMY()));
102
103SND_SOC_DAILINK_DEF(media,
104	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
105
106SND_SOC_DAILINK_DEF(deepbuffer,
107	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
108
109SND_SOC_DAILINK_DEF(ssp2_port,
110	DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
111
112SND_SOC_DAILINK_DEF(platform,
113	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
114
115static struct snd_soc_dai_link dais[] = {
116	[MERR_DPCM_AUDIO] = {
117		.name = "Audio Port",
118		.stream_name = "Audio",
119		.ignore_suspend = 1,
120		.nonatomic = true,
121		.dynamic = 1,
122		.dpcm_playback = 1,
123		.dpcm_capture = 1,
124		.ops = &aif1_ops,
125		SND_SOC_DAILINK_REG(media, dummy, platform),
126	},
127	[MERR_DPCM_DEEP_BUFFER] = {
128		.name = "Deep-Buffer Audio Port",
129		.stream_name = "Deep-Buffer Audio",
130		.ignore_suspend = 1,
131		.nonatomic = true,
132		.dynamic = 1,
133		.dpcm_playback = 1,
134		.ops = &aif1_ops,
135		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
136	},
137	/* CODEC<->CODEC link */
138	/* back ends */
139	{
140		.name = "SSP2-LowSpeed Connector",
141		.id = 0,
142		.no_pcm = 1,
143		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
144						| SND_SOC_DAIFMT_CBC_CFC,
145		.be_hw_params_fixup = codec_fixup,
146		.ignore_suspend = 1,
147		.dpcm_playback = 1,
148		.dpcm_capture = 1,
149		SND_SOC_DAILINK_REG(ssp2_port, dummy, platform),
150	},
151};
152
153/* SoC card */
154static struct snd_soc_card bytcht_nocodec_card = {
155	.name = "bytcht-nocodec",
156	.owner = THIS_MODULE,
157	.dai_link = dais,
158	.num_links = ARRAY_SIZE(dais),
159	.dapm_widgets = widgets,
160	.num_dapm_widgets = ARRAY_SIZE(widgets),
161	.dapm_routes = audio_map,
162	.num_dapm_routes = ARRAY_SIZE(audio_map),
163	.controls = controls,
164	.num_controls = ARRAY_SIZE(controls),
165	.fully_routed = true,
166};
167
168static int snd_bytcht_nocodec_mc_probe(struct platform_device *pdev)
169{
170	int ret_val = 0;
171
172	/* register the soc card */
173	bytcht_nocodec_card.dev = &pdev->dev;
174
175	ret_val = devm_snd_soc_register_card(&pdev->dev, &bytcht_nocodec_card);
176
177	if (ret_val) {
178		dev_err(&pdev->dev, "devm_snd_soc_register_card failed %d\n",
179			ret_val);
180		return ret_val;
181	}
182	platform_set_drvdata(pdev, &bytcht_nocodec_card);
183	return ret_val;
184}
185
186static struct platform_driver snd_bytcht_nocodec_mc_driver = {
187	.driver = {
188		.name = "bytcht_nocodec",
189	},
190	.probe = snd_bytcht_nocodec_mc_probe,
191};
192module_platform_driver(snd_bytcht_nocodec_mc_driver);
193
194MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver");
195MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>");
196MODULE_LICENSE("GPL v2");
197MODULE_ALIAS("platform:bytcht_nocodec");
198