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Linux/sound/soc/blackfin/bfin-eval-adau1x81.c

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  1 /*
  2  * Machine driver for EVAL-ADAU1x81 on Analog Devices bfin
  3  * evaluation boards.
  4  *
  5  * Copyright 2011-2014 Analog Devices Inc.
  6  * Author: Lars-Peter Clausen <lars@metafoo.de>
  7  *
  8  * Licensed under the GPL-2 or later.
  9  */
 10 
 11 #include <linux/module.h>
 12 #include <linux/device.h>
 13 #include <linux/slab.h>
 14 #include <sound/core.h>
 15 #include <sound/pcm.h>
 16 #include <sound/soc.h>
 17 #include <sound/pcm_params.h>
 18 
 19 #include "../codecs/adau17x1.h"
 20 
 21 static const struct snd_soc_dapm_widget bfin_eval_adau1x81_dapm_widgets[] = {
 22         SND_SOC_DAPM_LINE("Stereo In", NULL),
 23         SND_SOC_DAPM_LINE("Beep", NULL),
 24 
 25         SND_SOC_DAPM_SPK("Speaker", NULL),
 26         SND_SOC_DAPM_HP("Headphone", NULL),
 27 };
 28 
 29 static const struct snd_soc_dapm_route bfin_eval_adau1x81_dapm_routes[] = {
 30         { "BEEP", NULL, "Beep" },
 31         { "LMIC", NULL, "Stereo In" },
 32         { "LMIC", NULL, "Stereo In" },
 33 
 34         { "Headphone", NULL, "AOUTL" },
 35         { "Headphone", NULL, "AOUTR" },
 36         { "Speaker", NULL, "SP" },
 37 };
 38 
 39 static int bfin_eval_adau1x81_hw_params(struct snd_pcm_substream *substream,
 40         struct snd_pcm_hw_params *params)
 41 {
 42         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 43         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 44         int pll_rate;
 45         int ret;
 46 
 47         switch (params_rate(params)) {
 48         case 48000:
 49         case 8000:
 50         case 12000:
 51         case 16000:
 52         case 24000:
 53         case 32000:
 54         case 96000:
 55                 pll_rate = 48000 * 1024;
 56                 break;
 57         case 44100:
 58         case 7350:
 59         case 11025:
 60         case 14700:
 61         case 22050:
 62         case 29400:
 63         case 88200:
 64                 pll_rate = 44100 * 1024;
 65                 break;
 66         default:
 67                 return -EINVAL;
 68         }
 69 
 70         ret = snd_soc_dai_set_pll(codec_dai, ADAU17X1_PLL,
 71                         ADAU17X1_PLL_SRC_MCLK, 12288000, pll_rate);
 72         if (ret)
 73                 return ret;
 74 
 75         ret = snd_soc_dai_set_sysclk(codec_dai, ADAU17X1_CLK_SRC_PLL, pll_rate,
 76                         SND_SOC_CLOCK_IN);
 77 
 78         return ret;
 79 }
 80 
 81 static const struct snd_soc_ops bfin_eval_adau1x81_ops = {
 82         .hw_params = bfin_eval_adau1x81_hw_params,
 83 };
 84 
 85 static struct snd_soc_dai_link bfin_eval_adau1x81_dai = {
 86         .name = "adau1x81",
 87         .stream_name = "adau1x81",
 88         .cpu_dai_name = "bfin-i2s.0",
 89         .codec_dai_name = "adau-hifi",
 90         .platform_name = "bfin-i2s-pcm-audio",
 91         .codec_name = "adau1781.0-0038",
 92         .ops = &bfin_eval_adau1x81_ops,
 93         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 94                 SND_SOC_DAIFMT_CBM_CFM,
 95 };
 96 
 97 static struct snd_soc_card bfin_eval_adau1x81 = {
 98         .name = "bfin-eval-adau1x81",
 99         .driver_name = "eval-adau1x81",
100         .dai_link = &bfin_eval_adau1x81_dai,
101         .num_links = 1,
102 
103         .dapm_widgets = bfin_eval_adau1x81_dapm_widgets,
104         .num_dapm_widgets = ARRAY_SIZE(bfin_eval_adau1x81_dapm_widgets),
105         .dapm_routes = bfin_eval_adau1x81_dapm_routes,
106         .num_dapm_routes = ARRAY_SIZE(bfin_eval_adau1x81_dapm_routes),
107         .fully_routed = true,
108 };
109 
110 static int bfin_eval_adau1x81_probe(struct platform_device *pdev)
111 {
112         bfin_eval_adau1x81.dev = &pdev->dev;
113 
114         return devm_snd_soc_register_card(&pdev->dev, &bfin_eval_adau1x81);
115 }
116 
117 static struct platform_driver bfin_eval_adau1x81_driver = {
118         .driver = {
119                 .name = "bfin-eval-adau1x81",
120                 .pm = &snd_soc_pm_ops,
121         },
122         .probe = bfin_eval_adau1x81_probe,
123 };
124 module_platform_driver(bfin_eval_adau1x81_driver);
125 
126 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
127 MODULE_DESCRIPTION("ALSA SoC bfin adau1x81 driver");
128 MODULE_LICENSE("GPL");
129 MODULE_ALIAS("platform:bfin-eval-adau1x81");
130 

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