2 * bytcht_nocodec.c - ASoc Machine driver for MinnowBoard Max and Up
3 * to make I2S signals observable on the Low-Speed connector. Audio codec
4 * is not managed by ASoC/DAPM
6 * Copyright (C) 2015-2017 Intel Corp
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2 of the License.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
22 #include <linux/module.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include "../atom/sst-atom-controls.h"
28 static const struct snd_soc_dapm_widget widgets
[] = {
29 SND_SOC_DAPM_MIC("Mic", NULL
),
30 SND_SOC_DAPM_SPK("Speaker", NULL
),
33 static const struct snd_kcontrol_new controls
[] = {
34 SOC_DAPM_PIN_SWITCH("Mic"),
35 SOC_DAPM_PIN_SWITCH("Speaker"),
38 static const struct snd_soc_dapm_route audio_map
[] = {
39 {"ssp2 Tx", NULL
, "codec_out0"},
40 {"ssp2 Tx", NULL
, "codec_out1"},
41 {"codec_in0", NULL
, "ssp2 Rx"},
42 {"codec_in1", NULL
, "ssp2 Rx"},
44 {"ssp2 Rx", NULL
, "Mic"},
45 {"Speaker", NULL
, "ssp2 Tx"},
48 static int codec_fixup(struct snd_soc_pcm_runtime
*rtd
,
49 struct snd_pcm_hw_params
*params
)
51 struct snd_interval
*rate
= hw_param_interval(params
,
52 SNDRV_PCM_HW_PARAM_RATE
);
53 struct snd_interval
*channels
= hw_param_interval(params
,
54 SNDRV_PCM_HW_PARAM_CHANNELS
);
57 /* The DSP will convert the FE rate to 48k, stereo, 24bits */
58 rate
->min
= rate
->max
= 48000;
59 channels
->min
= channels
->max
= 2;
61 /* set SSP2 to 24-bit */
62 params_set_format(params
, SNDRV_PCM_FORMAT_S24_LE
);
65 * Default mode for SSP configuration is TDM 4 slot, override config
66 * with explicit setting to I2S 2ch 24-bit. The word length is set with
67 * dai_set_tdm_slot() since there is no other API exposed
69 ret
= snd_soc_dai_set_fmt(rtd
->cpu_dai
,
71 SND_SOC_DAIFMT_NB_NF
|
72 SND_SOC_DAIFMT_CBS_CFS
);
75 dev_err(rtd
->dev
, "can't set format to I2S, err %d\n", ret
);
79 ret
= snd_soc_dai_set_tdm_slot(rtd
->cpu_dai
, 0x3, 0x3, 2, 24);
81 dev_err(rtd
->dev
, "can't set I2S config, err %d\n", ret
);
88 static const unsigned int rates_48000
[] = {
92 static const struct snd_pcm_hw_constraint_list constraints_48000
= {
93 .count
= ARRAY_SIZE(rates_48000
),
97 static int aif1_startup(struct snd_pcm_substream
*substream
)
99 return snd_pcm_hw_constraint_list(substream
->runtime
, 0,
100 SNDRV_PCM_HW_PARAM_RATE
,
104 static struct snd_soc_ops aif1_ops
= {
105 .startup
= aif1_startup
,
108 static struct snd_soc_dai_link dais
[] = {
109 [MERR_DPCM_AUDIO
] = {
110 .name
= "Audio Port",
111 .stream_name
= "Audio",
112 .cpu_dai_name
= "media-cpu-dai",
113 .codec_dai_name
= "snd-soc-dummy-dai",
114 .codec_name
= "snd-soc-dummy",
115 .platform_name
= "sst-mfld-platform",
123 [MERR_DPCM_DEEP_BUFFER
] = {
124 .name
= "Deep-Buffer Audio Port",
125 .stream_name
= "Deep-Buffer Audio",
126 .cpu_dai_name
= "deepbuffer-cpu-dai",
127 .codec_dai_name
= "snd-soc-dummy-dai",
128 .codec_name
= "snd-soc-dummy",
129 .platform_name
= "sst-mfld-platform",
136 /* CODEC<->CODEC link */
139 .name
= "SSP2-LowSpeed Connector",
141 .cpu_dai_name
= "ssp2-port",
142 .platform_name
= "sst-mfld-platform",
144 .codec_dai_name
= "snd-soc-dummy-dai",
145 .codec_name
= "snd-soc-dummy",
146 .dai_fmt
= SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
147 | SND_SOC_DAIFMT_CBS_CFS
,
148 .be_hw_params_fixup
= codec_fixup
,
157 static struct snd_soc_card bytcht_nocodec_card
= {
158 .name
= "bytcht-nocodec",
159 .owner
= THIS_MODULE
,
161 .num_links
= ARRAY_SIZE(dais
),
162 .dapm_widgets
= widgets
,
163 .num_dapm_widgets
= ARRAY_SIZE(widgets
),
164 .dapm_routes
= audio_map
,
165 .num_dapm_routes
= ARRAY_SIZE(audio_map
),
166 .controls
= controls
,
167 .num_controls
= ARRAY_SIZE(controls
),
168 .fully_routed
= true,
171 static int snd_bytcht_nocodec_mc_probe(struct platform_device
*pdev
)
175 /* register the soc card */
176 bytcht_nocodec_card
.dev
= &pdev
->dev
;
178 ret_val
= devm_snd_soc_register_card(&pdev
->dev
, &bytcht_nocodec_card
);
181 dev_err(&pdev
->dev
, "devm_snd_soc_register_card failed %d\n",
185 platform_set_drvdata(pdev
, &bytcht_nocodec_card
);
189 static struct platform_driver snd_bytcht_nocodec_mc_driver
= {
191 .name
= "bytcht_nocodec",
193 .probe
= snd_bytcht_nocodec_mc_probe
,
195 module_platform_driver(snd_bytcht_nocodec_mc_driver
);
197 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver");
198 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>");
199 MODULE_LICENSE("GPL v2");
200 MODULE_ALIAS("platform:bytcht_nocodec");