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, 453 insertions, 0 deletions

diff --git a/kernel/sound/soc/samsung/ac97.c b/kernel/sound/soc/samsung/ac97.c
new file mode 100644
index 000000000..e4145509d
--- /dev/null
+++ b/kernel/sound/soc/samsung/ac97.c
@@ -0,0 +1,453 @@
+/* sound/soc/samsung/ac97.c
+ *
+ * ALSA SoC Audio Layer - S3C AC97 Controller driver
+ * 	Evolved from s3c2443-ac97.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co. Ltd
+ *	Author: Jaswinder Singh <jassisinghbrar@gmail.com>
+ * 	Credits: Graeme Gregory, Sean Choi
+ *
+ * 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/io.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+
+#include <sound/soc.h>
+
+#include "regs-ac97.h"
+#include <linux/platform_data/asoc-s3c.h>
+
+#include "dma.h"
+
+#define AC_CMD_ADDR(x) (x << 16)
+#define AC_CMD_DATA(x) (x & 0xffff)
+
+#define S3C_AC97_DAI_PCM 0
+#define S3C_AC97_DAI_MIC 1
+
+struct s3c_ac97_info {
+	struct clk         *ac97_clk;
+	void __iomem	   *regs;
+	struct mutex       lock;
+	struct completion  done;
+};
+static struct s3c_ac97_info s3c_ac97;
+
+static struct s3c_dma_params s3c_ac97_pcm_out = {
+	.dma_size	= 4,
+};
+
+static struct s3c_dma_params s3c_ac97_pcm_in = {
+	.dma_size	= 4,
+};
+
+static struct s3c_dma_params s3c_ac97_mic_in = {
+	.dma_size	= 4,
+};
+
+static void s3c_ac97_activate(struct snd_ac97 *ac97)
+{
+	u32 ac_glbctrl, stat;
+
+	stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
+	if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)
+		return; /* Return if already active */
+
+	reinit_completion(&s3c_ac97.done);
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	msleep(1);
+
+	ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	msleep(1);
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
+		pr_err("AC97: Unable to activate!");
+}
+
+static unsigned short s3c_ac97_read(struct snd_ac97 *ac97,
+	unsigned short reg)
+{
+	u32 ac_glbctrl, ac_codec_cmd;
+	u32 stat, addr, data;
+
+	mutex_lock(&s3c_ac97.lock);
+
+	s3c_ac97_activate(ac97);
+
+	reinit_completion(&s3c_ac97.done);
+
+	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
+	ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);
+	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
+
+	udelay(50);
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
+		pr_err("AC97: Unable to read!");
+
+	stat = readl(s3c_ac97.regs + S3C_AC97_STAT);
+	addr = (stat >> 16) & 0x7f;
+	data = (stat & 0xffff);
+
+	if (addr != reg)
+		pr_err("ac97: req addr = %02x, rep addr = %02x\n",
+			reg, addr);
+
+	mutex_unlock(&s3c_ac97.lock);
+
+	return (unsigned short)data;
+}
+
+static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
+	unsigned short val)
+{
+	u32 ac_glbctrl, ac_codec_cmd;
+
+	mutex_lock(&s3c_ac97.lock);
+
+	s3c_ac97_activate(ac97);
+
+	reinit_completion(&s3c_ac97.done);
+
+	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
+	ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);
+	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
+
+	udelay(50);
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+	if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
+		pr_err("AC97: Unable to write!");
+
+	ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
+	ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;
+	writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
+
+	mutex_unlock(&s3c_ac97.lock);
+}
+
+static void s3c_ac97_cold_reset(struct snd_ac97 *ac97)
+{
+	pr_debug("AC97: Cold reset\n");
+	writel(S3C_AC97_GLBCTRL_COLDRESET,
+			s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	msleep(1);
+
+	writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	msleep(1);
+}
+
+static void s3c_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+	u32 stat;
+
+	stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
+	if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE)
+		return; /* Return if already active */
+
+	pr_debug("AC97: Warm reset\n");
+
+	writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	msleep(1);
+
+	writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	msleep(1);
+
+	s3c_ac97_activate(ac97);
+}
+
+static irqreturn_t s3c_ac97_irq(int irq, void *dev_id)
+{
+	u32 ac_glbctrl, ac_glbstat;
+
+	ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT);
+
+	if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) {
+
+		ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+		ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
+		writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+		complete(&s3c_ac97.done);
+	}
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	ac_glbctrl |= (1<<30); /* Clear interrupt */
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+	return IRQ_HANDLED;
+}
+
+static struct snd_ac97_bus_ops s3c_ac97_ops = {
+	.read       = s3c_ac97_read,
+	.write      = s3c_ac97_write,
+	.warm_reset = s3c_ac97_warm_reset,
+	.reset      = s3c_ac97_cold_reset,
+};
+
+static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
+				struct snd_soc_dai *dai)
+{
+	u32 ac_glbctrl;
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
+	else
+		ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+			ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
+		else
+			ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		break;
+	}
+
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+	return 0;
+}
+
+static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
+				    int cmd, struct snd_soc_dai *dai)
+{
+	u32 ac_glbctrl;
+
+	ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
+	ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		ac_glbctrl |= S3C_AC97_GLBCTRL_MICINTM_DMA;
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		break;
+	}
+
+	writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops s3c_ac97_dai_ops = {
+	.trigger	= s3c_ac97_trigger,
+};
+
+static const struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {
+	.trigger	= s3c_ac97_mic_trigger,
+};
+
+static int s3c_ac97_dai_probe(struct snd_soc_dai *dai)
+{
+	samsung_asoc_init_dma_data(dai, &s3c_ac97_pcm_out, &s3c_ac97_pcm_in);
+
+	return 0;
+}
+
+static int s3c_ac97_mic_dai_probe(struct snd_soc_dai *dai)
+{
+	samsung_asoc_init_dma_data(dai, NULL, &s3c_ac97_mic_in);
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver s3c_ac97_dai[] = {
+	[S3C_AC97_DAI_PCM] = {
+		.name =	"samsung-ac97",
+		.bus_control = true,
+		.playback = {
+			.stream_name = "AC97 Playback",
+			.channels_min = 2,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.capture = {
+			.stream_name = "AC97 Capture",
+			.channels_min = 2,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.probe = s3c_ac97_dai_probe,
+		.ops = &s3c_ac97_dai_ops,
+	},
+	[S3C_AC97_DAI_MIC] = {
+		.name = "samsung-ac97-mic",
+		.bus_control = true,
+		.capture = {
+			.stream_name = "AC97 Mic Capture",
+			.channels_min = 1,
+			.channels_max = 1,
+			.rates = SNDRV_PCM_RATE_8000_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.probe = s3c_ac97_mic_dai_probe,
+		.ops = &s3c_ac97_mic_dai_ops,
+	},
+};
+
+static const struct snd_soc_component_driver s3c_ac97_component = {
+	.name		= "s3c-ac97",
+};
+
+static int s3c_ac97_probe(struct platform_device *pdev)
+{
+	struct resource *mem_res, *dmatx_res, *dmarx_res, *dmamic_res, *irq_res;
+	struct s3c_audio_pdata *ac97_pdata;
+	int ret;
+
+	ac97_pdata = pdev->dev.platform_data;
+	if (!ac97_pdata || !ac97_pdata->cfg_gpio) {
+		dev_err(&pdev->dev, "cfg_gpio callback not provided!\n");
+		return -EINVAL;
+	}
+
+	/* Check for availability of necessary resource */
+	dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!dmatx_res) {
+		dev_err(&pdev->dev, "Unable to get AC97-TX dma resource\n");
+		return -ENXIO;
+	}
+
+	dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+	if (!dmarx_res) {
+		dev_err(&pdev->dev, "Unable to get AC97-RX dma resource\n");
+		return -ENXIO;
+	}
+
+	dmamic_res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
+	if (!dmamic_res) {
+		dev_err(&pdev->dev, "Unable to get AC97-MIC dma resource\n");
+		return -ENXIO;
+	}
+
+	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!irq_res) {
+		dev_err(&pdev->dev, "AC97 IRQ not provided!\n");
+		return -ENXIO;
+	}
+
+	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	s3c_ac97.regs = devm_ioremap_resource(&pdev->dev, mem_res);
+	if (IS_ERR(s3c_ac97.regs))
+		return PTR_ERR(s3c_ac97.regs);
+
+	s3c_ac97_pcm_out.channel = dmatx_res->start;
+	s3c_ac97_pcm_out.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
+	s3c_ac97_pcm_in.channel = dmarx_res->start;
+	s3c_ac97_pcm_in.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
+	s3c_ac97_mic_in.channel = dmamic_res->start;
+	s3c_ac97_mic_in.dma_addr = mem_res->start + S3C_AC97_MIC_DATA;
+
+	init_completion(&s3c_ac97.done);
+	mutex_init(&s3c_ac97.lock);
+
+	s3c_ac97.ac97_clk = devm_clk_get(&pdev->dev, "ac97");
+	if (IS_ERR(s3c_ac97.ac97_clk)) {
+		dev_err(&pdev->dev, "ac97 failed to get ac97_clock\n");
+		ret = -ENODEV;
+		goto err2;
+	}
+	clk_prepare_enable(s3c_ac97.ac97_clk);
+
+	if (ac97_pdata->cfg_gpio(pdev)) {
+		dev_err(&pdev->dev, "Unable to configure gpio\n");
+		ret = -EINVAL;
+		goto err3;
+	}
+
+	ret = request_irq(irq_res->start, s3c_ac97_irq,
+					0, "AC97", NULL);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "ac97: interrupt request failed.\n");
+		goto err4;
+	}
+
+	ret = snd_soc_set_ac97_ops(&s3c_ac97_ops);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
+		goto err4;
+	}
+
+	ret = devm_snd_soc_register_component(&pdev->dev, &s3c_ac97_component,
+					 s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai));
+	if (ret)
+		goto err5;
+
+	ret = samsung_asoc_dma_platform_register(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get register DMA: %d\n", ret);
+		goto err5;
+	}
+
+	return 0;
+err5:
+	free_irq(irq_res->start, NULL);
+err4:
+err3:
+	clk_disable_unprepare(s3c_ac97.ac97_clk);
+err2:
+	snd_soc_set_ac97_ops(NULL);
+	return ret;
+}
+
+static int s3c_ac97_remove(struct platform_device *pdev)
+{
+	struct resource *irq_res;
+
+	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (irq_res)
+		free_irq(irq_res->start, NULL);
+
+	clk_disable_unprepare(s3c_ac97.ac97_clk);
+	snd_soc_set_ac97_ops(NULL);
+
+	return 0;
+}
+
+static struct platform_driver s3c_ac97_driver = {
+	.probe  = s3c_ac97_probe,
+	.remove = s3c_ac97_remove,
+	.driver = {
+		.name = "samsung-ac97",
+	},
+};
+
+module_platform_driver(s3c_ac97_driver);
+
+MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
+MODULE_DESCRIPTION("AC97 driver for the Samsung SoC");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:samsung-ac97");