Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 176 insertions, 0 deletions

diff --git a/kernel/sound/soc/samsung/smdk_wm8580pcm.c b/kernel/sound/soc/samsung/smdk_wm8580pcm.c
new file mode 100644
index 000000000..6deec5234
--- /dev/null
+++ b/kernel/sound/soc/samsung/smdk_wm8580pcm.c
@@ -0,0 +1,176 @@
+/*
+ *  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 <linux/module.h>
+#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 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;
+
+	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,
+};
+
+#define SMDK_DAI_FMT (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | \
+	SND_SOC_DAIFMT_CBS_CFS)
+
+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 = "wm8580.0-001b",
+		.dai_fmt = SMDK_DAI_FMT,
+		.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-pcm.0",
+		.codec_name = "wm8580.0-001b",
+		.dai_fmt = SMDK_DAI_FMT,
+		.ops = &smdk_wm8580_pcm_ops,
+	},
+};
+
+static struct snd_soc_card smdk_pcm = {
+	.name = "SMDK-PCM",
+	.owner = THIS_MODULE,
+	.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 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 = 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 WM8580 for PCM");
+MODULE_LICENSE("GPL");