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, 424 insertions, 0 deletions

diff --git a/kernel/sound/soc/codecs/wm9705.c b/kernel/sound/soc/codecs/wm9705.c
new file mode 100644
index 000000000..5cc457ef8
--- /dev/null
+++ b/kernel/sound/soc/codecs/wm9705.c
@@ -0,0 +1,424 @@
+/*
+ * wm9705.c  --  ALSA Soc WM9705 codec support
+ *
+ * Copyright 2008 Ian Molton <spyro@f2s.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; Version 2 of the  License only.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "wm9705.h"
+
+/*
+ * WM9705 register cache
+ */
+static const u16 wm9705_reg[] = {
+	0x6150, 0x8000, 0x8000, 0x8000, /* 0x0  */
+	0x0000, 0x8000, 0x8008, 0x8008, /* 0x8  */
+	0x8808, 0x8808, 0x8808, 0x8808, /* 0x10 */
+	0x8808, 0x0000, 0x8000, 0x0000, /* 0x18 */
+	0x0000, 0x0000, 0x0000, 0x000f, /* 0x20 */
+	0x0605, 0x0000, 0xbb80, 0x0000, /* 0x28 */
+	0x0000, 0xbb80, 0x0000, 0x0000, /* 0x30 */
+	0x0000, 0x2000, 0x0000, 0x0000, /* 0x38 */
+	0x0000, 0x0000, 0x0000, 0x0000, /* 0x40 */
+	0x0000, 0x0000, 0x0000, 0x0000, /* 0x48 */
+	0x0000, 0x0000, 0x0000, 0x0000, /* 0x50 */
+	0x0000, 0x0000, 0x0000, 0x0000, /* 0x58 */
+	0x0000, 0x0000, 0x0000, 0x0000, /* 0x60 */
+	0x0000, 0x0000, 0x0000, 0x0000, /* 0x68 */
+	0x0000, 0x0808, 0x0000, 0x0006, /* 0x70 */
+	0x0000, 0x0000, 0x574d, 0x4c05, /* 0x78 */
+};
+
+static const struct snd_kcontrol_new wm9705_snd_ac97_controls[] = {
+	SOC_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1),
+	SOC_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),
+	SOC_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1),
+	SOC_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),
+	SOC_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1),
+	SOC_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),
+	SOC_SINGLE("Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1),
+	SOC_SINGLE("Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),
+	SOC_SINGLE("PCBeep Playback Volume", AC97_PC_BEEP, 1, 15, 1),
+	SOC_SINGLE("Phone Playback Volume", AC97_PHONE, 0, 31, 1),
+	SOC_DOUBLE("Line Playback Volume", AC97_LINE, 8, 0, 31, 1),
+	SOC_DOUBLE("CD Playback Volume", AC97_CD, 8, 0, 31, 1),
+	SOC_SINGLE("Mic Playback Volume", AC97_MIC, 0, 31, 1),
+	SOC_SINGLE("Mic 20dB Boost Switch", AC97_MIC, 6, 1, 0),
+	SOC_DOUBLE("Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0),
+	SOC_SINGLE("Capture Switch", AC97_REC_GAIN, 15, 1, 1),
+};
+
+static const char *wm9705_mic[] = {"Mic 1", "Mic 2"};
+static const char *wm9705_rec_sel[] = {"Mic", "CD", "NC", "NC",
+	"Line", "Stereo Mix", "Mono Mix", "Phone"};
+
+static SOC_ENUM_SINGLE_DECL(wm9705_enum_mic,
+			    AC97_GENERAL_PURPOSE, 8, wm9705_mic);
+static SOC_ENUM_SINGLE_DECL(wm9705_enum_rec_l,
+			    AC97_REC_SEL, 8, wm9705_rec_sel);
+static SOC_ENUM_SINGLE_DECL(wm9705_enum_rec_r,
+			    AC97_REC_SEL, 0, wm9705_rec_sel);
+
+/* Headphone Mixer */
+static const struct snd_kcontrol_new wm9705_hp_mixer_controls[] = {
+	SOC_DAPM_SINGLE("PCBeep Playback Switch", AC97_PC_BEEP, 15, 1, 1),
+	SOC_DAPM_SINGLE("CD Playback Switch", AC97_CD, 15, 1, 1),
+	SOC_DAPM_SINGLE("Mic Playback Switch", AC97_MIC, 15, 1, 1),
+	SOC_DAPM_SINGLE("Phone Playback Switch", AC97_PHONE, 15, 1, 1),
+	SOC_DAPM_SINGLE("Line Playback Switch", AC97_LINE, 15, 1, 1),
+};
+
+/* Mic source */
+static const struct snd_kcontrol_new wm9705_mic_src_controls =
+	SOC_DAPM_ENUM("Route", wm9705_enum_mic);
+
+/* Capture source */
+static const struct snd_kcontrol_new wm9705_capture_selectl_controls =
+	SOC_DAPM_ENUM("Route", wm9705_enum_rec_l);
+static const struct snd_kcontrol_new wm9705_capture_selectr_controls =
+	SOC_DAPM_ENUM("Route", wm9705_enum_rec_r);
+
+/* DAPM widgets */
+static const struct snd_soc_dapm_widget wm9705_dapm_widgets[] = {
+	SND_SOC_DAPM_MUX("Mic Source", SND_SOC_NOPM, 0, 0,
+		&wm9705_mic_src_controls),
+	SND_SOC_DAPM_MUX("Left Capture Source", SND_SOC_NOPM, 0, 0,
+		&wm9705_capture_selectl_controls),
+	SND_SOC_DAPM_MUX("Right Capture Source", SND_SOC_NOPM, 0, 0,
+		&wm9705_capture_selectr_controls),
+	SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback",
+		SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback",
+		SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_MIXER_NAMED_CTL("HP Mixer", SND_SOC_NOPM, 0, 0,
+		&wm9705_hp_mixer_controls[0],
+		ARRAY_SIZE(wm9705_hp_mixer_controls)),
+	SND_SOC_DAPM_MIXER("Mono Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_ADC("Left ADC", "Left HiFi Capture", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_ADC("Right ADC", "Right HiFi Capture", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_PGA("Headphone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Speaker PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Line PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Line out PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Mono PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Phone PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Mic PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("PCBEEP PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("CD PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("ADC PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_OUTPUT("HPOUTL"),
+	SND_SOC_DAPM_OUTPUT("HPOUTR"),
+	SND_SOC_DAPM_OUTPUT("LOUT"),
+	SND_SOC_DAPM_OUTPUT("ROUT"),
+	SND_SOC_DAPM_OUTPUT("MONOOUT"),
+	SND_SOC_DAPM_INPUT("PHONE"),
+	SND_SOC_DAPM_INPUT("LINEINL"),
+	SND_SOC_DAPM_INPUT("LINEINR"),
+	SND_SOC_DAPM_INPUT("CDINL"),
+	SND_SOC_DAPM_INPUT("CDINR"),
+	SND_SOC_DAPM_INPUT("PCBEEP"),
+	SND_SOC_DAPM_INPUT("MIC1"),
+	SND_SOC_DAPM_INPUT("MIC2"),
+};
+
+/* Audio map
+ * WM9705 has no switches to disable the route from the inputs to the HP mixer
+ * so in order to prevent active inputs from forcing the audio outputs to be
+ * constantly enabled, we use the mutes on those inputs to simulate such
+ * controls.
+ */
+static const struct snd_soc_dapm_route wm9705_audio_map[] = {
+	/* HP mixer */
+	{"HP Mixer", "PCBeep Playback Switch", "PCBEEP PGA"},
+	{"HP Mixer", "CD Playback Switch", "CD PGA"},
+	{"HP Mixer", "Mic Playback Switch", "Mic PGA"},
+	{"HP Mixer", "Phone Playback Switch", "Phone PGA"},
+	{"HP Mixer", "Line Playback Switch", "Line PGA"},
+	{"HP Mixer", NULL, "Left DAC"},
+	{"HP Mixer", NULL, "Right DAC"},
+
+	/* mono mixer */
+	{"Mono Mixer", NULL, "HP Mixer"},
+
+	/* outputs */
+	{"Headphone PGA", NULL, "HP Mixer"},
+	{"HPOUTL", NULL, "Headphone PGA"},
+	{"HPOUTR", NULL, "Headphone PGA"},
+	{"Line out PGA", NULL, "HP Mixer"},
+	{"LOUT", NULL, "Line out PGA"},
+	{"ROUT", NULL, "Line out PGA"},
+	{"Mono PGA", NULL, "Mono Mixer"},
+	{"MONOOUT", NULL, "Mono PGA"},
+
+	/* inputs */
+	{"CD PGA", NULL, "CDINL"},
+	{"CD PGA", NULL, "CDINR"},
+	{"Line PGA", NULL, "LINEINL"},
+	{"Line PGA", NULL, "LINEINR"},
+	{"Phone PGA", NULL, "PHONE"},
+	{"Mic Source", "Mic 1", "MIC1"},
+	{"Mic Source", "Mic 2", "MIC2"},
+	{"Mic PGA", NULL, "Mic Source"},
+	{"PCBEEP PGA", NULL, "PCBEEP"},
+
+	/* Left capture selector */
+	{"Left Capture Source", "Mic", "Mic Source"},
+	{"Left Capture Source", "CD", "CDINL"},
+	{"Left Capture Source", "Line", "LINEINL"},
+	{"Left Capture Source", "Stereo Mix", "HP Mixer"},
+	{"Left Capture Source", "Mono Mix", "HP Mixer"},
+	{"Left Capture Source", "Phone", "PHONE"},
+
+	/* Right capture source */
+	{"Right Capture Source", "Mic", "Mic Source"},
+	{"Right Capture Source", "CD", "CDINR"},
+	{"Right Capture Source", "Line", "LINEINR"},
+	{"Right Capture Source", "Stereo Mix", "HP Mixer"},
+	{"Right Capture Source", "Mono Mix", "HP Mixer"},
+	{"Right Capture Source", "Phone", "PHONE"},
+
+	{"ADC PGA", NULL, "Left Capture Source"},
+	{"ADC PGA", NULL, "Right Capture Source"},
+
+	/* ADC's */
+	{"Left ADC",  NULL, "ADC PGA"},
+	{"Right ADC", NULL, "ADC PGA"},
+};
+
+/* We use a register cache to enhance read performance. */
+static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
+	u16 *cache = codec->reg_cache;
+
+	switch (reg) {
+	case AC97_RESET:
+	case AC97_VENDOR_ID1:
+	case AC97_VENDOR_ID2:
+		return soc_ac97_ops->read(ac97, reg);
+	default:
+		reg = reg >> 1;
+
+		if (reg >= (ARRAY_SIZE(wm9705_reg)))
+			return -EIO;
+
+		return cache[reg];
+	}
+}
+
+static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
+	unsigned int val)
+{
+	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
+	u16 *cache = codec->reg_cache;
+
+	soc_ac97_ops->write(ac97, reg, val);
+	reg = reg >> 1;
+	if (reg < (ARRAY_SIZE(wm9705_reg)))
+		cache[reg] = val;
+
+	return 0;
+}
+
+static int ac97_prepare(struct snd_pcm_substream *substream,
+			struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	int reg;
+	u16 vra;
+
+	vra = ac97_read(codec, AC97_EXTENDED_STATUS);
+	ac97_write(codec, AC97_EXTENDED_STATUS, vra | 0x1);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		reg = AC97_PCM_FRONT_DAC_RATE;
+	else
+		reg = AC97_PCM_LR_ADC_RATE;
+
+	return ac97_write(codec, reg, substream->runtime->rate);
+}
+
+#define WM9705_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \
+			SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
+			SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+			SNDRV_PCM_RATE_48000)
+
+static const struct snd_soc_dai_ops wm9705_dai_ops = {
+	.prepare	= ac97_prepare,
+};
+
+static struct snd_soc_dai_driver wm9705_dai[] = {
+	{
+		.name = "wm9705-hifi",
+		.playback = {
+			.stream_name = "HiFi Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = WM9705_AC97_RATES,
+			.formats = SND_SOC_STD_AC97_FMTS,
+		},
+		.capture = {
+			.stream_name = "HiFi Capture",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = WM9705_AC97_RATES,
+			.formats = SND_SOC_STD_AC97_FMTS,
+		},
+		.ops = &wm9705_dai_ops,
+	},
+	{
+		.name = "wm9705-aux",
+		.playback = {
+			.stream_name = "Aux Playback",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = WM9705_AC97_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+		},
+	}
+};
+
+static int wm9705_reset(struct snd_soc_codec *codec)
+{
+	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
+
+	if (soc_ac97_ops->reset) {
+		soc_ac97_ops->reset(ac97);
+		if (ac97_read(codec, 0) == wm9705_reg[0])
+			return 0; /* Success */
+	}
+
+	dev_err(codec->dev, "Failed to reset: AC97 link error\n");
+
+	return -EIO;
+}
+
+#ifdef CONFIG_PM
+static int wm9705_soc_suspend(struct snd_soc_codec *codec)
+{
+	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
+
+	soc_ac97_ops->write(ac97, AC97_POWERDOWN, 0xffff);
+
+	return 0;
+}
+
+static int wm9705_soc_resume(struct snd_soc_codec *codec)
+{
+	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
+	int i, ret;
+	u16 *cache = codec->reg_cache;
+
+	ret = wm9705_reset(codec);
+	if (ret < 0)
+		return ret;
+
+	for (i = 2; i < ARRAY_SIZE(wm9705_reg) << 1; i += 2) {
+		soc_ac97_ops->write(ac97, i, cache[i>>1]);
+	}
+
+	return 0;
+}
+#else
+#define wm9705_soc_suspend NULL
+#define wm9705_soc_resume NULL
+#endif
+
+static int wm9705_soc_probe(struct snd_soc_codec *codec)
+{
+	struct snd_ac97 *ac97;
+	int ret = 0;
+
+	ac97 = snd_soc_alloc_ac97_codec(codec);
+	if (IS_ERR(ac97)) {
+		ret = PTR_ERR(ac97);
+		dev_err(codec->dev, "Failed to register AC97 codec\n");
+		return ret;
+	}
+
+	ret = wm9705_reset(codec);
+	if (ret)
+		goto err_put_device;
+
+	ret = device_add(&ac97->dev);
+	if (ret)
+		goto err_put_device;
+
+	snd_soc_codec_set_drvdata(codec, ac97);
+
+	return 0;
+
+err_put_device:
+	put_device(&ac97->dev);
+	return ret;
+}
+
+static int wm9705_soc_remove(struct snd_soc_codec *codec)
+{
+	struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec);
+
+	snd_soc_free_ac97_codec(ac97);
+	return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm9705 = {
+	.probe = 	wm9705_soc_probe,
+	.remove = 	wm9705_soc_remove,
+	.suspend =	wm9705_soc_suspend,
+	.resume =	wm9705_soc_resume,
+	.read = ac97_read,
+	.write = ac97_write,
+	.reg_cache_size = ARRAY_SIZE(wm9705_reg),
+	.reg_word_size = sizeof(u16),
+	.reg_cache_step = 2,
+	.reg_cache_default = wm9705_reg,
+
+	.controls = wm9705_snd_ac97_controls,
+	.num_controls = ARRAY_SIZE(wm9705_snd_ac97_controls),
+	.dapm_widgets = wm9705_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(wm9705_dapm_widgets),
+	.dapm_routes = wm9705_audio_map,
+	.num_dapm_routes = ARRAY_SIZE(wm9705_audio_map),
+};
+
+static int wm9705_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_codec(&pdev->dev,
+			&soc_codec_dev_wm9705, wm9705_dai, ARRAY_SIZE(wm9705_dai));
+}
+
+static int wm9705_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver wm9705_codec_driver = {
+	.driver = {
+			.name = "wm9705-codec",
+	},
+
+	.probe = wm9705_probe,
+	.remove = wm9705_remove,
+};
+
+module_platform_driver(wm9705_codec_driver);
+
+MODULE_DESCRIPTION("ASoC WM9705 driver");
+MODULE_AUTHOR("Ian Molton");
+MODULE_LICENSE("GPL v2");