Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / samsung / smdk_wm8994pcm.c

diff --git a/kernel/sound/soc/samsung/smdk_wm8994pcm.c b/kernel/sound/soc/samsung/smdk_wm8994pcm.c
new file mode 100644 (file)
index 0000000..b1c89ec
--- /dev/null
+++ b/kernel/sound/soc/samsung/smdk_wm8994pcm.c
@@ -0,0 +1,143 @@
+/*
+ *  sound/soc/samsung/smdk_wm8994pcm.c
+ *
+ *  Copyright (c) 2011 Samsung Electronics Co., Ltd
+ *             http://www.samsung.com
+ *
+ *  This program is free software; you can redistribute  it and/or  modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "../codecs/wm8994.h"
+#include "dma.h"
+#include "pcm.h"
+
+/*
+ * Board Settings:
+ *  o '1' means 'ON'
+ *  o '0' means 'OFF'
+ *  o 'X' means 'Don't care'
+ *
+ * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
+ */
+
+/*
+ * Configure audio route as :-
+ * $ amixer sset 'DAC1' on,on
+ * $ amixer sset 'Right Headphone Mux' 'DAC'
+ * $ amixer sset 'Left Headphone Mux' 'DAC'
+ * $ amixer sset 'DAC1R Mixer AIF1.1' on
+ * $ amixer sset 'DAC1L Mixer AIF1.1' on
+ * $ amixer sset 'IN2L' on
+ * $ amixer sset 'IN2L PGA IN2LN' on
+ * $ amixer sset 'MIXINL IN2L' on
+ * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
+ * $ amixer sset 'IN2R' on
+ * $ amixer sset 'IN2R PGA IN2RN' on
+ * $ amixer sset 'MIXINR IN2R' on
+ * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
+ */
+
+/* SMDK has a 16.9344MHZ crystal attached to WM8994 */
+#define SMDK_WM8994_FREQ 16934400
+
+static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
+                             struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *codec_dai = rtd->codec_dai;
+       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+       unsigned long mclk_freq;
+       int rfs, ret;
+
+       switch(params_rate(params)) {
+       case 8000:
+               rfs = 512;
+               break;
+       default:
+               dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
+               __func__, __LINE__, params_rate(params));
+               return -EINVAL;
+       }
+
+       mclk_freq = params_rate(params) * rfs;
+
+       ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
+                                       mclk_freq, SND_SOC_CLOCK_IN);
+       if (ret < 0)
+               return ret;
+
+       ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
+                                       SMDK_WM8994_FREQ, mclk_freq);
+       if (ret < 0)
+               return ret;
+
+       /* Set PCM source clock on CPU */
+       ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
+                                       mclk_freq, SND_SOC_CLOCK_IN);
+       if (ret < 0)
+               return ret;
+
+       /* Set SCLK_DIV for making bclk */
+       ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static struct snd_soc_ops smdk_wm8994_pcm_ops = {
+       .hw_params = smdk_wm8994_pcm_hw_params,
+};
+
+static struct snd_soc_dai_link smdk_dai[] = {
+       {
+               .name = "WM8994 PAIF PCM",
+               .stream_name = "Primary PCM",
+               .cpu_dai_name = "samsung-pcm.0",
+               .codec_dai_name = "wm8994-aif1",
+               .platform_name = "samsung-pcm.0",
+               .codec_name = "wm8994-codec",
+               .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
+                          SND_SOC_DAIFMT_CBS_CFS,
+               .ops = &smdk_wm8994_pcm_ops,
+       },
+};
+
+static struct snd_soc_card smdk_pcm = {
+       .name = "SMDK-PCM",
+       .owner = THIS_MODULE,
+       .dai_link = smdk_dai,
+       .num_links = 1,
+};
+
+static int snd_smdk_probe(struct platform_device *pdev)
+{
+       int ret = 0;
+
+       smdk_pcm.dev = &pdev->dev;
+       ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
+       if (ret)
+               dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
+
+       return ret;
+}
+
+static struct platform_driver snd_smdk_driver = {
+       .driver = {
+               .name = "samsung-smdk-pcm",
+       },
+       .probe = snd_smdk_probe,
+};
+
+module_platform_driver(snd_smdk_driver);
+
+MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
+MODULE_LICENSE("GPL");