1 /* 2 * dmic.c -- SoC audio for Generic Digital MICs 3 * 4 * Author: Liam Girdwood <lrg@slimlogic.co.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * version 2 as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 18 * 02110-1301 USA 19 * 20 */ 21 22 #include <linux/platform_device.h> 23 #include <linux/slab.h> 24 #include <linux/module.h> 25 #include <sound/core.h> 26 #include <sound/pcm.h> 27 #include <sound/soc.h> 28 #include <sound/soc-dapm.h> 29 30 static struct snd_soc_dai_driver dmic_dai = { 31 .name = "dmic-hifi", 32 .capture = { 33 .stream_name = "Capture", 34 .channels_min = 1, 35 .channels_max = 8, 36 .rates = SNDRV_PCM_RATE_CONTINUOUS, 37 .formats = SNDRV_PCM_FMTBIT_S32_LE 38 | SNDRV_PCM_FMTBIT_S24_LE 39 | SNDRV_PCM_FMTBIT_S16_LE, 40 }, 41 }; 42 43 static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = { 44 SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0, 45 SND_SOC_NOPM, 0, 0), 46 SND_SOC_DAPM_INPUT("DMic"), 47 }; 48 49 static const struct snd_soc_dapm_route intercon[] = { 50 {"DMIC AIF", NULL, "DMic"}, 51 }; 52 53 static int dmic_probe(struct snd_soc_codec *codec) 54 { 55 struct snd_soc_dapm_context *dapm = &codec->dapm; 56 57 snd_soc_dapm_new_controls(dapm, dmic_dapm_widgets, 58 ARRAY_SIZE(dmic_dapm_widgets)); 59 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon)); 60 snd_soc_dapm_new_widgets(dapm); 61 62 return 0; 63 } 64 65 static struct snd_soc_codec_driver soc_dmic = { 66 .probe = dmic_probe, 67 }; 68 69 static int dmic_dev_probe(struct platform_device *pdev) 70 { 71 return snd_soc_register_codec(&pdev->dev, 72 &soc_dmic, &dmic_dai, 1); 73 } 74 75 static int dmic_dev_remove(struct platform_device *pdev) 76 { 77 snd_soc_unregister_codec(&pdev->dev); 78 return 0; 79 } 80 81 MODULE_ALIAS("platform:dmic-codec"); 82 83 static struct platform_driver dmic_driver = { 84 .driver = { 85 .name = "dmic-codec", 86 .owner = THIS_MODULE, 87 }, 88 .probe = dmic_dev_probe, 89 .remove = dmic_dev_remove, 90 }; 91 92 module_platform_driver(dmic_driver); 93 94 MODULE_DESCRIPTION("Generic DMIC driver"); 95 MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); 96 MODULE_LICENSE("GPL"); 97