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 <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/soc.h> 27 #include <sound/soc-dapm.h> 28 29 static struct snd_soc_dai_driver dmic_dai = { 30 .name = "dmic-hifi", 31 .capture = { 32 .stream_name = "Capture", 33 .channels_min = 1, 34 .channels_max = 8, 35 .rates = SNDRV_PCM_RATE_CONTINUOUS, 36 .formats = SNDRV_PCM_FMTBIT_S32_LE 37 | SNDRV_PCM_FMTBIT_S24_LE 38 | SNDRV_PCM_FMTBIT_S16_LE, 39 }, 40 }; 41 42 static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = { 43 SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0, 44 SND_SOC_NOPM, 0, 0), 45 SND_SOC_DAPM_INPUT("DMic"), 46 }; 47 48 static const struct snd_soc_dapm_route intercon[] = { 49 {"DMIC AIF", NULL, "DMic"}, 50 }; 51 52 static int dmic_probe(struct snd_soc_codec *codec) 53 { 54 struct snd_soc_dapm_context *dapm = &codec->dapm; 55 56 snd_soc_dapm_new_controls(dapm, dmic_dapm_widgets, 57 ARRAY_SIZE(dmic_dapm_widgets)); 58 snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon)); 59 snd_soc_dapm_new_widgets(dapm); 60 61 return 0; 62 } 63 64 static struct snd_soc_codec_driver soc_dmic = { 65 .probe = dmic_probe, 66 }; 67 68 static int __devinit dmic_dev_probe(struct platform_device *pdev) 69 { 70 return snd_soc_register_codec(&pdev->dev, 71 &soc_dmic, &dmic_dai, 1); 72 } 73 74 static int __devexit dmic_dev_remove(struct platform_device *pdev) 75 { 76 snd_soc_unregister_codec(&pdev->dev); 77 return 0; 78 } 79 80 MODULE_ALIAS("platform:dmic-codec"); 81 82 static struct platform_driver dmic_driver = { 83 .driver = { 84 .name = "dmic-codec", 85 .owner = THIS_MODULE, 86 }, 87 .probe = dmic_dev_probe, 88 .remove = __devexit_p(dmic_dev_remove), 89 }; 90 91 static int __init dmic_init(void) 92 { 93 return platform_driver_register(&dmic_driver); 94 } 95 module_init(dmic_init); 96 97 static void __exit dmic_exit(void) 98 { 99 platform_driver_unregister(&dmic_driver); 100 } 101 module_exit(dmic_exit); 102 103 MODULE_DESCRIPTION("Generic DMIC driver"); 104 MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>"); 105 MODULE_LICENSE("GPL"); 106