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, 583 insertions, 0 deletions

diff --git a/kernel/sound/soc/codecs/wm8776.c b/kernel/sound/soc/codecs/wm8776.c
new file mode 100644
index 000000000..c13050b77
--- /dev/null
+++ b/kernel/sound/soc/codecs/wm8776.c
@@ -0,0 +1,583 @@
+/*
+ * wm8776.c  --  WM8776 ALSA SoC Audio driver
+ *
+ * Copyright 2009-12 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * TODO: Input ALC/limiter support
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include "wm8776.h"
+
+enum wm8776_chip_type {
+	WM8775 = 1,
+	WM8776,
+};
+
+/* codec private data */
+struct wm8776_priv {
+	struct regmap *regmap;
+	int sysclk[2];
+};
+
+static const struct reg_default wm8776_reg_defaults[] = {
+	{  0, 0x79 },
+	{  1, 0x79 },
+	{  2, 0x79 },
+	{  3, 0xff },
+	{  4, 0xff },
+	{  5, 0xff },
+	{  6, 0x00 },
+	{  7, 0x90 },
+	{  8, 0x00 },
+	{  9, 0x00 },
+	{ 10, 0x22 },
+	{ 11, 0x22 },
+	{ 12, 0x22 },
+	{ 13, 0x08 },
+	{ 14, 0xcf },
+	{ 15, 0xcf },
+	{ 16, 0x7b },
+	{ 17, 0x00 },
+	{ 18, 0x32 },
+	{ 19, 0x00 },
+	{ 20, 0xa6 },
+	{ 21, 0x01 },
+	{ 22, 0x01 },
+};
+
+static bool wm8776_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case WM8776_RESET:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static int wm8776_reset(struct snd_soc_codec *codec)
+{
+	return snd_soc_write(codec, WM8776_RESET, 0);
+}
+
+static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
+
+static const struct snd_kcontrol_new wm8776_snd_controls[] = {
+SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
+		 0, 127, 0, hp_tlv),
+SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
+		 0, 255, 0, dac_tlv),
+SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
+
+SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
+
+SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
+		 0, 255, 0, adc_tlv),
+SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
+SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
+SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
+};
+
+static const struct snd_kcontrol_new inmix_controls[] = {
+SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
+SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
+SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
+SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
+SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
+};
+
+static const struct snd_kcontrol_new outmix_controls[] = {
+SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
+SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
+SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
+SND_SOC_DAPM_INPUT("AUX"),
+
+SND_SOC_DAPM_INPUT("AIN1"),
+SND_SOC_DAPM_INPUT("AIN2"),
+SND_SOC_DAPM_INPUT("AIN3"),
+SND_SOC_DAPM_INPUT("AIN4"),
+SND_SOC_DAPM_INPUT("AIN5"),
+
+SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
+		   inmix_controls, ARRAY_SIZE(inmix_controls)),
+
+SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
+SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
+
+SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
+		   outmix_controls, ARRAY_SIZE(outmix_controls)),
+
+SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
+
+SND_SOC_DAPM_OUTPUT("VOUT"),
+
+SND_SOC_DAPM_OUTPUT("HPOUTL"),
+SND_SOC_DAPM_OUTPUT("HPOUTR"),
+};
+
+static const struct snd_soc_dapm_route routes[] = {
+	{ "Input Mixer", "AIN1 Switch", "AIN1" },
+	{ "Input Mixer", "AIN2 Switch", "AIN2" },
+	{ "Input Mixer", "AIN3 Switch", "AIN3" },
+	{ "Input Mixer", "AIN4 Switch", "AIN4" },
+	{ "Input Mixer", "AIN5 Switch", "AIN5" },
+
+	{ "ADC", NULL, "Input Mixer" },
+
+	{ "Output Mixer", "DAC Switch", "DAC" },
+	{ "Output Mixer", "AUX Switch", "AUX" },
+	{ "Output Mixer", "Bypass Switch", "Input Mixer" },
+
+	{ "VOUT", NULL, "Output Mixer" },
+
+	{ "Headphone PGA", NULL, "Output Mixer" },
+
+	{ "HPOUTL", NULL, "Headphone PGA" },
+	{ "HPOUTR", NULL, "Headphone PGA" },
+};
+
+static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	int reg, iface, master;
+
+	switch (dai->driver->id) {
+	case WM8776_DAI_DAC:
+		reg = WM8776_DACIFCTRL;
+		master = 0x80;
+		break;
+	case WM8776_DAI_ADC:
+		reg = WM8776_ADCIFCTRL;
+		master = 0x100;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	iface = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		master = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		iface |= 0x0002;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		iface |= 0x0001;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		iface |= 0x00c;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		iface |= 0x008;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		iface |= 0x004;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Finally, write out the values */
+	snd_soc_update_bits(codec, reg, 0xf, iface);
+	snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
+
+	return 0;
+}
+
+static int mclk_ratios[] = {
+	128,
+	192,
+	256,
+	384,
+	512,
+	768,
+};
+
+static int wm8776_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
+	int iface_reg, iface;
+	int ratio_shift, master;
+	int i;
+
+	switch (dai->driver->id) {
+	case WM8776_DAI_DAC:
+		iface_reg = WM8776_DACIFCTRL;
+		master = 0x80;
+		ratio_shift = 4;
+		break;
+	case WM8776_DAI_ADC:
+		iface_reg = WM8776_ADCIFCTRL;
+		master = 0x100;
+		ratio_shift = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Set word length */
+	switch (snd_pcm_format_width(params_format(params))) {
+	case 16:
+		iface = 0;
+		break;
+	case 20:
+		iface = 0x10;
+		break;
+	case 24:
+		iface = 0x20;
+		break;
+	case 32:
+		iface = 0x30;
+		break;
+	default:
+		dev_err(codec->dev, "Unsupported sample size: %i\n",
+			snd_pcm_format_width(params_format(params)));
+		return -EINVAL;
+	}
+
+	/* Only need to set MCLK/LRCLK ratio if we're master */
+	if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
+		for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
+			if (wm8776->sysclk[dai->driver->id] / params_rate(params)
+			    == mclk_ratios[i])
+				break;
+		}
+
+		if (i == ARRAY_SIZE(mclk_ratios)) {
+			dev_err(codec->dev,
+				"Unable to configure MCLK ratio %d/%d\n",
+				wm8776->sysclk[dai->driver->id], params_rate(params));
+			return -EINVAL;
+		}
+
+		dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
+
+		snd_soc_update_bits(codec, WM8776_MSTRCTRL,
+				    0x7 << ratio_shift, i << ratio_shift);
+	} else {
+		dev_dbg(codec->dev, "DAI in slave mode\n");
+	}
+
+	snd_soc_update_bits(codec, iface_reg, 0x30, iface);
+
+	return 0;
+}
+
+static int wm8776_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct snd_soc_codec *codec = dai->codec;
+
+	return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
+}
+
+static int wm8776_set_sysclk(struct snd_soc_dai *dai,
+			     int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
+
+	if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
+		return -EINVAL;
+
+	wm8776->sysclk[dai->driver->id] = freq;
+
+	return 0;
+}
+
+static int wm8776_set_bias_level(struct snd_soc_codec *codec,
+				 enum snd_soc_bias_level level)
+{
+	struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+			regcache_sync(wm8776->regmap);
+
+			/* Disable the global powerdown; DAPM does the rest */
+			snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
+		}
+
+		break;
+	case SND_SOC_BIAS_OFF:
+		snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
+		break;
+	}
+
+	codec->dapm.bias_level = level;
+	return 0;
+}
+
+#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops wm8776_dac_ops = {
+	.digital_mute	= wm8776_mute,
+	.hw_params      = wm8776_hw_params,
+	.set_fmt        = wm8776_set_fmt,
+	.set_sysclk     = wm8776_set_sysclk,
+};
+
+static const struct snd_soc_dai_ops wm8776_adc_ops = {
+	.hw_params      = wm8776_hw_params,
+	.set_fmt        = wm8776_set_fmt,
+	.set_sysclk     = wm8776_set_sysclk,
+};
+
+static struct snd_soc_dai_driver wm8776_dai[] = {
+	{
+		.name = "wm8776-hifi-playback",
+		.id	= WM8776_DAI_DAC,
+		.playback = {
+			.stream_name = "Playback",
+			.channels_min = 2,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_CONTINUOUS,
+			.rate_min = 32000,
+			.rate_max = 192000,
+			.formats = WM8776_FORMATS,
+		},
+		.ops = &wm8776_dac_ops,
+	},
+	{
+		.name = "wm8776-hifi-capture",
+		.id	= WM8776_DAI_ADC,
+		.capture = {
+			.stream_name = "Capture",
+			.channels_min = 2,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_CONTINUOUS,
+			.rate_min = 32000,
+			.rate_max = 96000,
+			.formats = WM8776_FORMATS,
+		},
+		.ops = &wm8776_adc_ops,
+	},
+};
+
+static int wm8776_probe(struct snd_soc_codec *codec)
+{
+	int ret = 0;
+
+	ret = wm8776_reset(codec);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
+		return ret;
+	}
+
+	/* Latch the update bits; right channel only since we always
+	 * update both. */
+	snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
+	snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
+
+	return ret;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
+	.probe = 	wm8776_probe,
+	.set_bias_level = wm8776_set_bias_level,
+	.suspend_bias_off = true,
+
+	.controls = wm8776_snd_controls,
+	.num_controls = ARRAY_SIZE(wm8776_snd_controls),
+	.dapm_widgets = wm8776_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
+	.dapm_routes = routes,
+	.num_dapm_routes = ARRAY_SIZE(routes),
+};
+
+static const struct of_device_id wm8776_of_match[] = {
+	{ .compatible = "wlf,wm8776", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wm8776_of_match);
+
+static const struct regmap_config wm8776_regmap = {
+	.reg_bits = 7,
+	.val_bits = 9,
+	.max_register = WM8776_RESET,
+
+	.reg_defaults = wm8776_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
+	.cache_type = REGCACHE_RBTREE,
+
+	.volatile_reg = wm8776_volatile,
+};
+
+#if defined(CONFIG_SPI_MASTER)
+static int wm8776_spi_probe(struct spi_device *spi)
+{
+	struct wm8776_priv *wm8776;
+	int ret;
+
+	wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
+			      GFP_KERNEL);
+	if (wm8776 == NULL)
+		return -ENOMEM;
+
+	wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
+	if (IS_ERR(wm8776->regmap))
+		return PTR_ERR(wm8776->regmap);
+
+	spi_set_drvdata(spi, wm8776);
+
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
+
+	return ret;
+}
+
+static int wm8776_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+	return 0;
+}
+
+static struct spi_driver wm8776_spi_driver = {
+	.driver = {
+		.name	= "wm8776",
+		.owner	= THIS_MODULE,
+		.of_match_table = wm8776_of_match,
+	},
+	.probe		= wm8776_spi_probe,
+	.remove		= wm8776_spi_remove,
+};
+#endif /* CONFIG_SPI_MASTER */
+
+#if IS_ENABLED(CONFIG_I2C)
+static int wm8776_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct wm8776_priv *wm8776;
+	int ret;
+
+	wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
+			      GFP_KERNEL);
+	if (wm8776 == NULL)
+		return -ENOMEM;
+
+	wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
+	if (IS_ERR(wm8776->regmap))
+		return PTR_ERR(wm8776->regmap);
+
+	i2c_set_clientdata(i2c, wm8776);
+
+	ret =  snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
+
+	return ret;
+}
+
+static int wm8776_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	return 0;
+}
+
+static const struct i2c_device_id wm8776_i2c_id[] = {
+	{ "wm8775", WM8775 },
+	{ "wm8776", WM8776 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
+
+static struct i2c_driver wm8776_i2c_driver = {
+	.driver = {
+		.name = "wm8776",
+		.owner = THIS_MODULE,
+		.of_match_table = wm8776_of_match,
+	},
+	.probe =    wm8776_i2c_probe,
+	.remove =   wm8776_i2c_remove,
+	.id_table = wm8776_i2c_id,
+};
+#endif
+
+static int __init wm8776_modinit(void)
+{
+	int ret = 0;
+#if IS_ENABLED(CONFIG_I2C)
+	ret = i2c_add_driver(&wm8776_i2c_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
+		       ret);
+	}
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	ret = spi_register_driver(&wm8776_spi_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
+		       ret);
+	}
+#endif
+	return ret;
+}
+module_init(wm8776_modinit);
+
+static void __exit wm8776_exit(void)
+{
+#if IS_ENABLED(CONFIG_I2C)
+	i2c_del_driver(&wm8776_i2c_driver);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	spi_unregister_driver(&wm8776_spi_driver);
+#endif
+}
+module_exit(wm8776_exit);
+
+MODULE_DESCRIPTION("ASoC WM8776 driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");