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, 525 insertions, 0 deletions

diff --git a/kernel/sound/soc/codecs/wm8711.c b/kernel/sound/soc/codecs/wm8711.c
new file mode 100644
index 000000000..121e46d53
--- /dev/null
+++ b/kernel/sound/soc/codecs/wm8711.c
@@ -0,0 +1,525 @@
+/*
+ * wm8711.c  --  WM8711 ALSA SoC Audio driver
+ *
+ * Copyright 2006 Wolfson Microelectronics
+ *
+ * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
+ *
+ * Based on wm8731.c by Richard Purdie
+ *
+ * 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.
+ */
+
+#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/regmap.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/of_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include <sound/initval.h>
+
+#include "wm8711.h"
+
+/* codec private data */
+struct wm8711_priv {
+	struct regmap *regmap;
+	unsigned int sysclk;
+};
+
+/*
+ * wm8711 register cache
+ * We can't read the WM8711 register space when we are
+ * using 2 wire for device control, so we cache them instead.
+ * There is no point in caching the reset register
+ */
+static const struct reg_default wm8711_reg_defaults[] = {
+	{ 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
+	{ 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
+};
+
+static bool wm8711_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case WM8711_RESET:
+		return true;
+	default:
+		return false;
+	}
+}
+
+#define wm8711_reset(c)	snd_soc_write(c, WM8711_RESET, 0)
+
+static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
+
+static const struct snd_kcontrol_new wm8711_snd_controls[] = {
+
+SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
+		 0, 127, 0, out_tlv),
+SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
+	7, 1, 0),
+
+};
+
+/* Output Mixer */
+static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
+SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
+SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
+SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
+	&wm8711_output_mixer_controls[0],
+	ARRAY_SIZE(wm8711_output_mixer_controls)),
+SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
+SND_SOC_DAPM_OUTPUT("LOUT"),
+SND_SOC_DAPM_OUTPUT("LHPOUT"),
+SND_SOC_DAPM_OUTPUT("ROUT"),
+SND_SOC_DAPM_OUTPUT("RHPOUT"),
+};
+
+static const struct snd_soc_dapm_route wm8711_intercon[] = {
+	/* output mixer */
+	{"Output Mixer", "Line Bypass Switch", "Line Input"},
+	{"Output Mixer", "HiFi Playback Switch", "DAC"},
+
+	/* outputs */
+	{"RHPOUT", NULL, "Output Mixer"},
+	{"ROUT", NULL, "Output Mixer"},
+	{"LHPOUT", NULL, "Output Mixer"},
+	{"LOUT", NULL, "Output Mixer"},
+};
+
+struct _coeff_div {
+	u32 mclk;
+	u32 rate;
+	u16 fs;
+	u8 sr:4;
+	u8 bosr:1;
+	u8 usb:1;
+};
+
+/* codec mclk clock divider coefficients */
+static const struct _coeff_div coeff_div[] = {
+	/* 48k */
+	{12288000, 48000, 256, 0x0, 0x0, 0x0},
+	{18432000, 48000, 384, 0x0, 0x1, 0x0},
+	{12000000, 48000, 250, 0x0, 0x0, 0x1},
+
+	/* 32k */
+	{12288000, 32000, 384, 0x6, 0x0, 0x0},
+	{18432000, 32000, 576, 0x6, 0x1, 0x0},
+	{12000000, 32000, 375, 0x6, 0x0, 0x1},
+
+	/* 8k */
+	{12288000, 8000, 1536, 0x3, 0x0, 0x0},
+	{18432000, 8000, 2304, 0x3, 0x1, 0x0},
+	{11289600, 8000, 1408, 0xb, 0x0, 0x0},
+	{16934400, 8000, 2112, 0xb, 0x1, 0x0},
+	{12000000, 8000, 1500, 0x3, 0x0, 0x1},
+
+	/* 96k */
+	{12288000, 96000, 128, 0x7, 0x0, 0x0},
+	{18432000, 96000, 192, 0x7, 0x1, 0x0},
+	{12000000, 96000, 125, 0x7, 0x0, 0x1},
+
+	/* 44.1k */
+	{11289600, 44100, 256, 0x8, 0x0, 0x0},
+	{16934400, 44100, 384, 0x8, 0x1, 0x0},
+	{12000000, 44100, 272, 0x8, 0x1, 0x1},
+
+	/* 88.2k */
+	{11289600, 88200, 128, 0xf, 0x0, 0x0},
+	{16934400, 88200, 192, 0xf, 0x1, 0x0},
+	{12000000, 88200, 136, 0xf, 0x1, 0x1},
+};
+
+static inline int get_coeff(int mclk, int rate)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
+		if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
+			return i;
+	}
+	return 0;
+}
+
+static int wm8711_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 wm8711_priv *wm8711 =  snd_soc_codec_get_drvdata(codec);
+	u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3;
+	int i = get_coeff(wm8711->sysclk, params_rate(params));
+	u16 srate = (coeff_div[i].sr << 2) |
+		(coeff_div[i].bosr << 1) | coeff_div[i].usb;
+
+	snd_soc_write(codec, WM8711_SRATE, srate);
+
+	/* bit size */
+	switch (params_width(params)) {
+	case 16:
+		break;
+	case 20:
+		iface |= 0x0004;
+		break;
+	case 24:
+		iface |= 0x0008;
+		break;
+	}
+
+	snd_soc_write(codec, WM8711_IFACE, iface);
+	return 0;
+}
+
+static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
+			      struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+
+	/* set active */
+	snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
+
+	return 0;
+}
+
+static void wm8711_shutdown(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+
+	/* deactivate */
+	if (!snd_soc_codec_is_active(codec)) {
+		udelay(50);
+		snd_soc_write(codec, WM8711_ACTIVE, 0x0);
+	}
+}
+
+static int wm8711_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
+
+	if (mute)
+		snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8);
+	else
+		snd_soc_write(codec, WM8711_APDIGI, mute_reg);
+
+	return 0;
+}
+
+static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+		int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct wm8711_priv *wm8711 =  snd_soc_codec_get_drvdata(codec);
+
+	switch (freq) {
+	case 11289600:
+	case 12000000:
+	case 12288000:
+	case 16934400:
+	case 18432000:
+		wm8711->sysclk = freq;
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
+		unsigned int fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0x000c;
+
+	/* set master/slave audio interface */
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		iface |= 0x0040;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* interface format */
+	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;
+	case SND_SOC_DAIFMT_DSP_A:
+		iface |= 0x0003;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		iface |= 0x0013;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* clock inversion */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		iface |= 0x0090;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		iface |= 0x0080;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		iface |= 0x0010;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* set iface */
+	snd_soc_write(codec, WM8711_IFACE, iface);
+	return 0;
+}
+
+static int wm8711_set_bias_level(struct snd_soc_codec *codec,
+	enum snd_soc_bias_level level)
+{
+	struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
+	u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		snd_soc_write(codec, WM8711_PWR, reg);
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+			regcache_sync(wm8711->regmap);
+
+		snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
+		break;
+	case SND_SOC_BIAS_OFF:
+		snd_soc_write(codec, WM8711_ACTIVE, 0x0);
+		snd_soc_write(codec, WM8711_PWR, 0xffff);
+		break;
+	}
+	codec->dapm.bias_level = level;
+	return 0;
+}
+
+#define WM8711_RATES SNDRV_PCM_RATE_8000_96000
+
+#define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+	SNDRV_PCM_FMTBIT_S24_LE)
+
+static const struct snd_soc_dai_ops wm8711_ops = {
+	.prepare = wm8711_pcm_prepare,
+	.hw_params = wm8711_hw_params,
+	.shutdown = wm8711_shutdown,
+	.digital_mute = wm8711_mute,
+	.set_sysclk = wm8711_set_dai_sysclk,
+	.set_fmt = wm8711_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver wm8711_dai = {
+	.name = "wm8711-hifi",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = WM8711_RATES,
+		.formats = WM8711_FORMATS,
+	},
+	.ops = &wm8711_ops,
+};
+
+static int wm8711_probe(struct snd_soc_codec *codec)
+{
+	int ret;
+
+	ret = wm8711_reset(codec);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to issue reset\n");
+		return ret;
+	}
+
+	/* Latch the update bits */
+	snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100);
+	snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100);
+
+	return ret;
+
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8711 = {
+	.probe =	wm8711_probe,
+	.set_bias_level = wm8711_set_bias_level,
+	.suspend_bias_off = true,
+
+	.controls = wm8711_snd_controls,
+	.num_controls = ARRAY_SIZE(wm8711_snd_controls),
+	.dapm_widgets = wm8711_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets),
+	.dapm_routes = wm8711_intercon,
+	.num_dapm_routes = ARRAY_SIZE(wm8711_intercon),
+};
+
+static const struct of_device_id wm8711_of_match[] = {
+	{ .compatible = "wlf,wm8711", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wm8711_of_match);
+
+static const struct regmap_config wm8711_regmap = {
+	.reg_bits = 7,
+	.val_bits = 9,
+	.max_register = WM8711_RESET,
+
+	.reg_defaults = wm8711_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
+	.cache_type = REGCACHE_RBTREE,
+
+	.volatile_reg = wm8711_volatile,
+};
+
+#if defined(CONFIG_SPI_MASTER)
+static int wm8711_spi_probe(struct spi_device *spi)
+{
+	struct wm8711_priv *wm8711;
+	int ret;
+
+	wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
+			      GFP_KERNEL);
+	if (wm8711 == NULL)
+		return -ENOMEM;
+
+	wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
+	if (IS_ERR(wm8711->regmap))
+		return PTR_ERR(wm8711->regmap);
+
+	spi_set_drvdata(spi, wm8711);
+
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_dev_wm8711, &wm8711_dai, 1);
+
+	return ret;
+}
+
+static int wm8711_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+
+	return 0;
+}
+
+static struct spi_driver wm8711_spi_driver = {
+	.driver = {
+		.name	= "wm8711",
+		.owner	= THIS_MODULE,
+		.of_match_table = wm8711_of_match,
+	},
+	.probe		= wm8711_spi_probe,
+	.remove		= wm8711_spi_remove,
+};
+#endif /* CONFIG_SPI_MASTER */
+
+#if IS_ENABLED(CONFIG_I2C)
+static int wm8711_i2c_probe(struct i2c_client *client,
+			    const struct i2c_device_id *id)
+{
+	struct wm8711_priv *wm8711;
+	int ret;
+
+	wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
+			      GFP_KERNEL);
+	if (wm8711 == NULL)
+		return -ENOMEM;
+
+	wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
+	if (IS_ERR(wm8711->regmap))
+		return PTR_ERR(wm8711->regmap);
+
+	i2c_set_clientdata(client, wm8711);
+
+	ret =  snd_soc_register_codec(&client->dev,
+			&soc_codec_dev_wm8711, &wm8711_dai, 1);
+
+	return ret;
+}
+
+static int wm8711_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	return 0;
+}
+
+static const struct i2c_device_id wm8711_i2c_id[] = {
+	{ "wm8711", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
+
+static struct i2c_driver wm8711_i2c_driver = {
+	.driver = {
+		.name = "wm8711",
+		.owner = THIS_MODULE,
+		.of_match_table = wm8711_of_match,
+	},
+	.probe =    wm8711_i2c_probe,
+	.remove =   wm8711_i2c_remove,
+	.id_table = wm8711_i2c_id,
+};
+#endif
+
+static int __init wm8711_modinit(void)
+{
+	int ret;
+#if IS_ENABLED(CONFIG_I2C)
+	ret = i2c_add_driver(&wm8711_i2c_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
+		       ret);
+	}
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	ret = spi_register_driver(&wm8711_spi_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
+		       ret);
+	}
+#endif
+	return 0;
+}
+module_init(wm8711_modinit);
+
+static void __exit wm8711_exit(void)
+{
+#if IS_ENABLED(CONFIG_I2C)
+	i2c_del_driver(&wm8711_i2c_driver);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+	spi_unregister_driver(&wm8711_spi_driver);
+#endif
+}
+module_exit(wm8711_exit);
+
+MODULE_DESCRIPTION("ASoC WM8711 driver");
+MODULE_AUTHOR("Mike Arthur");
+MODULE_LICENSE("GPL");