kernel/sound/soc/samsung/jive_wm8750.c

   1 /* sound/soc/samsung/jive_wm8750.c
   2  *
   3  * Copyright 2007,2008 Simtec Electronics
   4  *
   5  * Based on sound/soc/pxa/spitz.c
   6  *      Copyright 2005 Wolfson Microelectronics PLC.
   7  *      Copyright 2005 Openedhand Ltd.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12 */
  13
  14 #include <linux/module.h>
  15 #include <sound/soc.h>
  16
  17 #include <asm/mach-types.h>
  18
  19 #include "s3c2412-i2s.h"
  20 #include "../codecs/wm8750.h"
  21
  22 static const struct snd_soc_dapm_route audio_map[] = {
  23         { "Headphone Jack", NULL, "LOUT1" },
  24         { "Headphone Jack", NULL, "ROUT1" },
  25         { "Internal Speaker", NULL, "LOUT2" },
  26         { "Internal Speaker", NULL, "ROUT2" },
  27         { "LINPUT1", NULL, "Line Input" },
  28         { "RINPUT1", NULL, "Line Input" },
  29 };
  30
  31 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
  32         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  33         SND_SOC_DAPM_SPK("Internal Speaker", NULL),
  34         SND_SOC_DAPM_LINE("Line In", NULL),
  35 };
  36
  37 static int jive_hw_params(struct snd_pcm_substream *substream,
  38                           struct snd_pcm_hw_params *params)
  39 {
  40         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  41         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  42         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  43         struct s3c_i2sv2_rate_calc div;
  44         unsigned int clk = 0;
  45         int ret = 0;
  46
  47         switch (params_rate(params)) {
  48         case 8000:
  49         case 16000:
  50         case 48000:
  51         case 96000:
  52                 clk = 12288000;
  53                 break;
  54         case 11025:
  55         case 22050:
  56         case 44100:
  57                 clk = 11289600;
  58                 break;
  59         }
  60
  61         s3c_i2sv2_iis_calc_rate(&div, NULL, params_rate(params),
  62                                 s3c_i2sv2_get_clock(cpu_dai));
  63
  64         /* set the codec system clock for DAC and ADC */
  65         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  66                                      SND_SOC_CLOCK_IN);
  67         if (ret < 0)
  68                 return ret;
  69
  70         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_RCLK, div.fs_div);
  71         if (ret < 0)
  72                 return ret;
  73
  74         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_PRESCALER,
  75                                      div.clk_div - 1);
  76         if (ret < 0)
  77                 return ret;
  78
  79         return 0;
  80 }
  81
  82 static struct snd_soc_ops jive_ops = {
  83         .hw_params      = jive_hw_params,
  84 };
  85
  86 static struct snd_soc_dai_link jive_dai = {
  87         .name           = "wm8750",
  88         .stream_name    = "WM8750",
  89         .cpu_dai_name   = "s3c2412-i2s",
  90         .codec_dai_name = "wm8750-hifi",
  91         .platform_name  = "s3c2412-i2s",
  92         .codec_name     = "wm8750.0-001a",
  93         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  94                           SND_SOC_DAIFMT_CBS_CFS,
  95         .ops            = &jive_ops,
  96 };
  97
  98 /* jive audio machine driver */
  99 static struct snd_soc_card snd_soc_machine_jive = {
 100         .name           = "Jive",
 101         .owner          = THIS_MODULE,
 102         .dai_link       = &jive_dai,
 103         .num_links      = 1,
 104
 105         .dapm_widgets   = wm8750_dapm_widgets,
 106         .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
 107         .dapm_routes    = audio_map,
 108         .num_dapm_routes = ARRAY_SIZE(audio_map),
 109         .fully_routed   = true,
 110 };
 111
 112 static struct platform_device *jive_snd_device;
 113
 114 static int __init jive_init(void)
 115 {
 116         int ret;
 117
 118         if (!machine_is_jive())
 119                 return 0;
 120
 121         printk("JIVE WM8750 Audio support\n");
 122
 123         jive_snd_device = platform_device_alloc("soc-audio", -1);
 124         if (!jive_snd_device)
 125                 return -ENOMEM;
 126
 127         platform_set_drvdata(jive_snd_device, &snd_soc_machine_jive);
 128         ret = platform_device_add(jive_snd_device);
 129
 130         if (ret)
 131                 platform_device_put(jive_snd_device);
 132
 133         return ret;
 134 }
 135
 136 static void __exit jive_exit(void)
 137 {
 138         platform_device_unregister(jive_snd_device);
 139 }
 140
 141 module_init(jive_init);
 142 module_exit(jive_exit);
 143
 144 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
 145 MODULE_DESCRIPTION("ALSA SoC Jive Audio support");
 146 MODULE_LICENSE("GPL");