sound/soc/s3c24xx/jive_wm8750.c

   1 /* sound/soc/s3c24xx/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 <linux/moduleparam.h>
  16 #include <linux/timer.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/clk.h>
  20
  21 #include <sound/core.h>
  22 #include <sound/pcm.h>
  23 #include <sound/soc.h>
  24
  25 #include <asm/mach-types.h>
  26
  27 #include "s3c-dma.h"
  28 #include "s3c2412-i2s.h"
  29
  30 #include "../codecs/wm8750.h"
  31
  32 static const struct snd_soc_dapm_route audio_map[] = {
  33         { "Headphone Jack", NULL, "LOUT1" },
  34         { "Headphone Jack", NULL, "ROUT1" },
  35         { "Internal Speaker", NULL, "LOUT2" },
  36         { "Internal Speaker", NULL, "ROUT2" },
  37         { "LINPUT1", NULL, "Line Input" },
  38         { "RINPUT1", NULL, "Line Input" },
  39 };
  40
  41 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
  42         SND_SOC_DAPM_HP("Headphone Jack", NULL),
  43         SND_SOC_DAPM_SPK("Internal Speaker", NULL),
  44         SND_SOC_DAPM_LINE("Line In", NULL),
  45 };
  46
  47 static int jive_hw_params(struct snd_pcm_substream *substream,
  48                           struct snd_pcm_hw_params *params)
  49 {
  50         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  51         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  52         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  53         struct s3c_i2sv2_rate_calc div;
  54         unsigned int clk = 0;
  55         int ret = 0;
  56
  57         switch (params_rate(params)) {
  58         case 8000:
  59         case 16000:
  60         case 48000:
  61         case 96000:
  62                 clk = 12288000;
  63                 break;
  64         case 11025:
  65         case 22050:
  66         case 44100:
  67                 clk = 11289600;
  68                 break;
  69         }
  70
  71         s3c_i2sv2_iis_calc_rate(&div, NULL, params_rate(params),
  72                                 s3c_i2sv2_get_clock(cpu_dai));
  73
  74         /* set codec DAI configuration */
  75         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  76                                   SND_SOC_DAIFMT_NB_NF |
  77                                   SND_SOC_DAIFMT_CBS_CFS);
  78         if (ret < 0)
  79                 return ret;
  80
  81         /* set cpu DAI configuration */
  82         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  83                                   SND_SOC_DAIFMT_NB_NF |
  84                                   SND_SOC_DAIFMT_CBS_CFS);
  85         if (ret < 0)
  86                 return ret;
  87
  88         /* set the codec system clock for DAC and ADC */
  89         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
  90                                      SND_SOC_CLOCK_IN);
  91         if (ret < 0)
  92                 return ret;
  93
  94         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_RCLK, div.fs_div);
  95         if (ret < 0)
  96                 return ret;
  97
  98         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C2412_DIV_PRESCALER,
  99                                      div.clk_div - 1);
 100         if (ret < 0)
 101                 return ret;
 102
 103         return 0;
 104 }
 105
 106 static struct snd_soc_ops jive_ops = {
 107         .hw_params      = jive_hw_params,
 108 };
 109
 110 static int jive_wm8750_init(struct snd_soc_pcm_runtime *rtd)
 111 {
 112         struct snd_soc_codec *codec = rtd->codec;
 113         struct snd_soc_dapm_context *dapm = &codec->dapm;
 114         int err;
 115
 116         /* These endpoints are not being used. */
 117         snd_soc_dapm_nc_pin(dapm, "LINPUT2");
 118         snd_soc_dapm_nc_pin(dapm, "RINPUT2");
 119         snd_soc_dapm_nc_pin(dapm, "LINPUT3");
 120         snd_soc_dapm_nc_pin(dapm, "RINPUT3");
 121         snd_soc_dapm_nc_pin(dapm, "OUT3");
 122         snd_soc_dapm_nc_pin(dapm, "MONO");
 123
 124         /* Add jive specific widgets */
 125         err = snd_soc_dapm_new_controls(dapm, wm8750_dapm_widgets,
 126                                         ARRAY_SIZE(wm8750_dapm_widgets));
 127         if (err) {
 128                 printk(KERN_ERR "%s: failed to add widgets (%d)\n",
 129                        __func__, err);
 130                 return err;
 131         }
 132
 133         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 134         snd_soc_dapm_sync(dapm);
 135
 136         return 0;
 137 }
 138
 139 static struct snd_soc_dai_link jive_dai = {
 140         .name           = "wm8750",
 141         .stream_name    = "WM8750",
 142         .cpu_dai_name   = "s3c2412-i2s",
 143         .codec_dai_name = "wm8750-hifi",
 144         .platform_name  = "samsung-audio",
 145         .codec_name     = "wm8750-codec.0-0x1a",
 146         .init           = jive_wm8750_init,
 147         .ops            = &jive_ops,
 148 };
 149
 150 /* jive audio machine driver */
 151 static struct snd_soc_card snd_soc_machine_jive = {
 152         .name           = "Jive",
 153         .dai_link       = &jive_dai,
 154         .num_links      = 1,
 155 };
 156
 157 static struct platform_device *jive_snd_device;
 158
 159 static int __init jive_init(void)
 160 {
 161         int ret;
 162
 163         if (!machine_is_jive())
 164                 return 0;
 165
 166         printk("JIVE WM8750 Audio support\n");
 167
 168         jive_snd_device = platform_device_alloc("soc-audio", -1);
 169         if (!jive_snd_device)
 170                 return -ENOMEM;
 171
 172         platform_set_drvdata(jive_snd_device, &snd_soc_machine_jive);
 173         ret = platform_device_add(jive_snd_device);
 174
 175         if (ret)
 176                 platform_device_put(jive_snd_device);
 177
 178         return ret;
 179 }
 180
 181 static void __exit jive_exit(void)
 182 {
 183         platform_device_unregister(jive_snd_device);
 184 }
 185
 186 module_init(jive_init);
 187 module_exit(jive_exit);
 188
 189 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
 190 MODULE_DESCRIPTION("ALSA SoC Jive Audio support");
 191 MODULE_LICENSE("GPL");