1 files changed, 206 insertions, 0 deletions

diff --git a/sound/soc/samsung/smdk_wm8580pcm.c b/sound/soc/samsung/smdk_wm8580pcm.c
new file mode 100644
index 000000000000..0d12092df164
--- /dev/null
+++ b/sound/soc/samsung/smdk_wm8580pcm.c
@@ -0,0 +1,206 @@
+/*
+ *  sound/soc/samsung/smdk_wm8580pcm.c
+ *
+ *  Copyright (c) 2011 Samsung Electronics Co. Ltd
+ *
+ *  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 <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/pcm.h>
+
+#include <asm/mach-types.h>
+
+#include "../codecs/wm8580.h"
+#include "dma.h"
+#include "pcm.h"
+
+/*
+ * Board Settings:
+ *  o '1' means 'ON'
+ *  o '0' means 'OFF'
+ *  o 'X' means 'Don't care'
+ *
+ * SMDK6410, SMDK6440, SMDK6450 Base B/D: CFG1-0000, CFG2-1111
+ * SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000
+ */
+
+#define SMDK_WM8580_EXT_OSC 12000000
+#define SMDK_WM8580_EXT_MCLK 4096000
+#define SMDK_WM8580_EXT_VOICE 2048000
+
+static unsigned long mclk_freq;
+static unsigned long xtal_freq;
+
+/*
+ * If MCLK clock directly gets from XTAL, we don't have to use PLL
+ * to make MCLK, but if XTAL clock source connects with other codec
+ * pin (like XTI), we should have to set codec's PLL to make MCLK.
+ * Because Samsung SoC does not support pcmcdclk output like I2S.
+ */
+
+static int smdk_wm8580_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;
+        int rfs, ret;
+
+        switch (params_rate(params)) {
+        case 8000:
+                break;
+        default:
+                printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n",
+                __func__, __LINE__, params_rate(params));
+                return -EINVAL;
+        }
+
+        rfs = mclk_freq / params_rate(params) / 2;
+
+        /* Set the codec DAI configuration */
+        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B
+                                | SND_SOC_DAIFMT_IB_NF
+                                | SND_SOC_DAIFMT_CBS_CFS);
+        if (ret < 0)
+                return ret;
+
+        /* Set the cpu DAI configuration */
+        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_B
+                                | SND_SOC_DAIFMT_IB_NF
+                                | SND_SOC_DAIFMT_CBS_CFS);
+        if (ret < 0)
+                return ret;
+
+        if (mclk_freq == xtal_freq) {
+                ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK,
+                                                mclk_freq, SND_SOC_CLOCK_IN);
+                if (ret < 0)
+                        return ret;
+
+                ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
+                                                WM8580_CLKSRC_MCLK);
+                if (ret < 0)
+                        return ret;
+        } else {
+                ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
+                                                mclk_freq, SND_SOC_CLOCK_IN);
+                if (ret < 0)
+                        return ret;
+
+                ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
+                                                WM8580_CLKSRC_PLLA);
+                if (ret < 0)
+                        return ret;
+
+                ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
+                                                xtal_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_wm8580_pcm_ops = {
+        .hw_params = smdk_wm8580_pcm_hw_params,
+};
+
+static struct snd_soc_dai_link smdk_dai[] = {
+        {
+                .name = "WM8580 PAIF PCM RX",
+                .stream_name = "Playback",
+                .cpu_dai_name = "samsung-pcm.0",
+                .codec_dai_name = "wm8580-hifi-playback",
+                .platform_name = "samsung-audio",
+                .codec_name = "wm8580-codec.0-001b",
+                .ops = &smdk_wm8580_pcm_ops,
+        }, {
+                .name = "WM8580 PAIF PCM TX",
+                .stream_name = "Capture",
+                .cpu_dai_name = "samsung-pcm.0",
+                .codec_dai_name = "wm8580-hifi-capture",
+                .platform_name = "samsung-audio",
+                .codec_name = "wm8580-codec.0-001b",
+                .ops = &smdk_wm8580_pcm_ops,
+        },
+};
+
+static struct snd_soc_card smdk_pcm = {
+        .name = "SMDK-PCM",
+        .dai_link = smdk_dai,
+        .num_links = 2,
+};
+
+/*
+ * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1)
+ * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4),
+ * 2.0484Mhz, directly with MCLK both Codec and SoC.
+ */
+static int __devinit snd_smdk_probe(struct platform_device *pdev)
+{
+        int ret = 0;
+
+        xtal_freq = SMDK_WM8580_EXT_OSC;
+        mclk_freq = SMDK_WM8580_EXT_MCLK;
+
+        if (machine_is_smdkc110() || machine_is_smdkv210())
+                xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE;
+
+        smdk_pcm.dev = &pdev->dev;
+        ret = snd_soc_register_card(&smdk_pcm);
+        if (ret) {
+                dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
+                return ret;
+        }
+
+        return 0;
+}
+
+static int __devexit snd_smdk_remove(struct platform_device *pdev)
+{
+        snd_soc_unregister_card(&smdk_pcm);
+        platform_set_drvdata(pdev, NULL);
+        return 0;
+}
+
+static struct platform_driver snd_smdk_driver = {
+        .driver = {
+                .owner = THIS_MODULE,
+                .name = "samsung-smdk-pcm",
+        },
+        .probe = snd_smdk_probe,
+        .remove = __devexit_p(snd_smdk_remove),
+};
+
+static int __init smdk_audio_init(void)
+{
+        return platform_driver_register(&snd_smdk_driver);
+}
+
+module_init(smdk_audio_init);
+
+static void __exit smdk_audio_exit(void)
+{
+        platform_driver_unregister(&snd_smdk_driver);
+}
+
+module_exit(smdk_audio_exit);
+
+MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
+MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM");
+MODULE_LICENSE("GPL");