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
20 static const struct snd_soc_dapm_widget widgets[] = {
21 SND_SOC_DAPM_MIC("Mic", NULL),
22 SND_SOC_DAPM_SPK("Speaker", NULL),
23 };
24
25 static const struct snd_kcontrol_new controls[] = {
26 SOC_DAPM_PIN_SWITCH("Mic"),
27 SOC_DAPM_PIN_SWITCH("Speaker"),
28 };
29
30 static 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
codec_fixup(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hw_params * params)40 static 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(asoc_rtd_to_cpu(rtd, 0),
62 SND_SOC_DAIFMT_I2S |
63 SND_SOC_DAIFMT_NB_NF |
64 SND_SOC_DAIFMT_CBS_CFS);
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(asoc_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
80 static const unsigned int rates_48000[] = {
81 48000,
82 };
83
84 static const struct snd_pcm_hw_constraint_list constraints_48000 = {
85 .count = ARRAY_SIZE(rates_48000),
86 .list = rates_48000,
87 };
88
aif1_startup(struct snd_pcm_substream * substream)89 static 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
96 static struct snd_soc_ops aif1_ops = {
97 .startup = aif1_startup,
98 };
99
100 SND_SOC_DAILINK_DEF(dummy,
101 DAILINK_COMP_ARRAY(COMP_DUMMY()));
102
103 SND_SOC_DAILINK_DEF(media,
104 DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
105
106 SND_SOC_DAILINK_DEF(deepbuffer,
107 DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
108
109 SND_SOC_DAILINK_DEF(ssp2_port,
110 DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
111
112 SND_SOC_DAILINK_DEF(platform,
113 DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
114
115 static 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_CBS_CFS,
145 .be_hw_params_fixup = codec_fixup,
146 .ignore_suspend = 1,
147 .nonatomic = true,
148 .dpcm_playback = 1,
149 .dpcm_capture = 1,
150 SND_SOC_DAILINK_REG(ssp2_port, dummy, platform),
151 },
152 };
153
154 /* SoC card */
155 static struct snd_soc_card bytcht_nocodec_card = {
156 .name = "bytcht-nocodec",
157 .owner = THIS_MODULE,
158 .dai_link = dais,
159 .num_links = ARRAY_SIZE(dais),
160 .dapm_widgets = widgets,
161 .num_dapm_widgets = ARRAY_SIZE(widgets),
162 .dapm_routes = audio_map,
163 .num_dapm_routes = ARRAY_SIZE(audio_map),
164 .controls = controls,
165 .num_controls = ARRAY_SIZE(controls),
166 .fully_routed = true,
167 };
168
snd_bytcht_nocodec_mc_probe(struct platform_device * pdev)169 static int snd_bytcht_nocodec_mc_probe(struct platform_device *pdev)
170 {
171 int ret_val = 0;
172
173 /* register the soc card */
174 bytcht_nocodec_card.dev = &pdev->dev;
175
176 ret_val = devm_snd_soc_register_card(&pdev->dev, &bytcht_nocodec_card);
177
178 if (ret_val) {
179 dev_err(&pdev->dev, "devm_snd_soc_register_card failed %d\n",
180 ret_val);
181 return ret_val;
182 }
183 platform_set_drvdata(pdev, &bytcht_nocodec_card);
184 return ret_val;
185 }
186
187 static struct platform_driver snd_bytcht_nocodec_mc_driver = {
188 .driver = {
189 .name = "bytcht_nocodec",
190 },
191 .probe = snd_bytcht_nocodec_mc_probe,
192 };
193 module_platform_driver(snd_bytcht_nocodec_mc_driver);
194
195 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver");
196 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>");
197 MODULE_LICENSE("GPL v2");
198 MODULE_ALIAS("platform:bytcht_nocodec");
199
