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 const struct snd_soc_codec_driver soc_dmic = { 54 .component_driver = { 55 .dapm_widgets = dmic_dapm_widgets, 56 .num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets), 57 .dapm_routes = intercon, 58 .num_dapm_routes = ARRAY_SIZE(intercon), 59 }, 60 }; 61 62 static int dmic_dev_probe(struct platform_device *pdev) 63 { 64 return snd_soc_register_codec(&pdev->dev, 65 &soc_dmic, &dmic_dai, 1); 66 } 67 68 static int dmic_dev_remove(struct platform_device *pdev) 69 { 70 snd_soc_unregister_codec(&pdev->dev); 71 return 0; 72 } 73 74 MODULE_ALIAS("platform:dmic-codec"); 75 76 static struct platform_driver dmic_driver = { 77 .driver = { 78 .name = "dmic-codec", 79 }, 80 .probe = dmic_dev_probe, 81 .remove = dmic_dev_remove, 82 }; 83 84 module_platform_driver(dmic_driver); 85 86 MODULE_DESCRIPTION("Generic DMIC driver"); 87 MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); 88 MODULE_LICENSE("GPL"); 89