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, 750 insertions, 0 deletions

diff --git a/kernel/sound/soc/sh/rcar/ssi.c b/kernel/sound/soc/sh/rcar/ssi.c
new file mode 100644
index 000000000..7bb9c087f
--- /dev/null
+++ b/kernel/sound/soc/sh/rcar/ssi.c
@@ -0,0 +1,750 @@
+/*
+ * Renesas R-Car SSIU/SSI support
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * Based on fsi.c
+ * Kuninori Morimoto <morimoto.kuninori@renesas.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.
+ */
+#include <linux/delay.h>
+#include "rsnd.h"
+#define RSND_SSI_NAME_SIZE 16
+
+/*
+ * SSICR
+ */
+#define	FORCE		(1 << 31)	/* Fixed */
+#define	DMEN		(1 << 28)	/* DMA Enable */
+#define	UIEN		(1 << 27)	/* Underflow Interrupt Enable */
+#define	OIEN		(1 << 26)	/* Overflow Interrupt Enable */
+#define	IIEN		(1 << 25)	/* Idle Mode Interrupt Enable */
+#define	DIEN		(1 << 24)	/* Data Interrupt Enable */
+
+#define	DWL_8		(0 << 19)	/* Data Word Length */
+#define	DWL_16		(1 << 19)	/* Data Word Length */
+#define	DWL_18		(2 << 19)	/* Data Word Length */
+#define	DWL_20		(3 << 19)	/* Data Word Length */
+#define	DWL_22		(4 << 19)	/* Data Word Length */
+#define	DWL_24		(5 << 19)	/* Data Word Length */
+#define	DWL_32		(6 << 19)	/* Data Word Length */
+
+#define	SWL_32		(3 << 16)	/* R/W System Word Length */
+#define	SCKD		(1 << 15)	/* Serial Bit Clock Direction */
+#define	SWSD		(1 << 14)	/* Serial WS Direction */
+#define	SCKP		(1 << 13)	/* Serial Bit Clock Polarity */
+#define	SWSP		(1 << 12)	/* Serial WS Polarity */
+#define	SDTA		(1 << 10)	/* Serial Data Alignment */
+#define	DEL		(1 <<  8)	/* Serial Data Delay */
+#define	CKDV(v)		(v <<  4)	/* Serial Clock Division Ratio */
+#define	TRMD		(1 <<  1)	/* Transmit/Receive Mode Select */
+#define	EN		(1 <<  0)	/* SSI Module Enable */
+
+/*
+ * SSISR
+ */
+#define	UIRQ		(1 << 27)	/* Underflow Error Interrupt Status */
+#define	OIRQ		(1 << 26)	/* Overflow Error Interrupt Status */
+#define	IIRQ		(1 << 25)	/* Idle Mode Interrupt Status */
+#define	DIRQ		(1 << 24)	/* Data Interrupt Status Flag */
+
+/*
+ * SSIWSR
+ */
+#define CONT		(1 << 8)	/* WS Continue Function */
+
+#define SSI_NAME "ssi"
+
+struct rsnd_ssi {
+	struct rsnd_ssi_platform_info *info; /* rcar_snd.h */
+	struct rsnd_ssi *parent;
+	struct rsnd_mod mod;
+
+	u32 cr_own;
+	u32 cr_clk;
+	int err;
+	unsigned int usrcnt;
+};
+
+#define for_each_rsnd_ssi(pos, priv, i)					\
+	for (i = 0;							\
+	     (i < rsnd_ssi_nr(priv)) &&					\
+		((pos) = ((struct rsnd_ssi *)(priv)->ssi + i));		\
+	     i++)
+
+#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
+#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
+#define rsnd_dma_to_ssi(dma)  rsnd_mod_to_ssi(rsnd_dma_to_mod(dma))
+#define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0)
+#define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent)
+#define rsnd_ssi_mode_flags(p) ((p)->info->flags)
+#define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id)
+#define rsnd_ssi_of_node(priv) \
+	of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi")
+
+int rsnd_ssi_use_busif(struct rsnd_mod *mod)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+	int use_busif = 0;
+
+	if (!rsnd_ssi_is_dma_mode(mod))
+		return 0;
+
+	if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF))
+		use_busif = 1;
+	if (rsnd_io_to_mod_src(io))
+		use_busif = 1;
+
+	return use_busif;
+}
+
+static void rsnd_ssi_status_check(struct rsnd_mod *mod,
+				  u32 bit)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	u32 status;
+	int i;
+
+	for (i = 0; i < 1024; i++) {
+		status = rsnd_mod_read(mod, SSISR);
+		if (status & bit)
+			return;
+
+		udelay(50);
+	}
+
+	dev_warn(dev, "status check failed\n");
+}
+
+static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi,
+				     struct rsnd_dai_stream *io)
+{
+	struct rsnd_priv *priv = rsnd_io_to_priv(io);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	int i, j, ret;
+	int adg_clk_div_table[] = {
+		1, 6, /* see adg.c */
+	};
+	int ssi_clk_mul_table[] = {
+		1, 2, 4, 8, 16, 6, 12,
+	};
+	unsigned int main_rate;
+	unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime);
+
+	/*
+	 * Find best clock, and try to start ADG
+	 */
+	for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) {
+		for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
+
+			/*
+			 * this driver is assuming that
+			 * system word is 64fs (= 2 x 32bit)
+			 * see rsnd_ssi_init()
+			 */
+			main_rate = rate / adg_clk_div_table[i]
+				* 32 * 2 * ssi_clk_mul_table[j];
+
+			ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate);
+			if (0 == ret) {
+				ssi->cr_clk	= FORCE | SWL_32 |
+						  SCKD | SWSD | CKDV(j);
+
+				dev_dbg(dev, "%s[%d] outputs %u Hz\n",
+					rsnd_mod_name(&ssi->mod),
+					rsnd_mod_id(&ssi->mod), rate);
+
+				return 0;
+			}
+		}
+	}
+
+	dev_err(dev, "unsupported clock rate\n");
+	return -EIO;
+}
+
+static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi)
+{
+	ssi->cr_clk = 0;
+	rsnd_adg_ssi_clk_stop(&ssi->mod);
+}
+
+static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
+			      struct rsnd_dai_stream *io)
+{
+	struct rsnd_priv *priv = rsnd_io_to_priv(io);
+	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	u32 cr_mode;
+	u32 cr;
+
+	if (0 == ssi->usrcnt) {
+		rsnd_mod_hw_start(&ssi->mod);
+
+		if (rsnd_rdai_is_clk_master(rdai)) {
+			if (rsnd_ssi_clk_from_parent(ssi))
+				rsnd_ssi_hw_start(ssi->parent, io);
+			else
+				rsnd_ssi_master_clk_start(ssi, io);
+		}
+	}
+
+	cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ?
+		DMEN :	/* DMA : enable DMA */
+		DIEN;	/* PIO : enable Data interrupt */
+
+
+	cr  =	ssi->cr_own	|
+		ssi->cr_clk	|
+		cr_mode		|
+		UIEN | OIEN | EN;
+
+	rsnd_mod_write(&ssi->mod, SSICR, cr);
+
+	/* enable WS continue */
+	if (rsnd_rdai_is_clk_master(rdai))
+		rsnd_mod_write(&ssi->mod, SSIWSR, CONT);
+
+	/* clear error status */
+	rsnd_mod_write(&ssi->mod, SSISR, 0);
+
+	ssi->usrcnt++;
+
+	dev_dbg(dev, "%s[%d] hw started\n",
+		rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
+}
+
+static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod);
+	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	u32 cr;
+
+	if (0 == ssi->usrcnt) /* stop might be called without start */
+		return;
+
+	ssi->usrcnt--;
+
+	if (0 == ssi->usrcnt) {
+		/*
+		 * disable all IRQ,
+		 * and, wait all data was sent
+		 */
+		cr  =	ssi->cr_own	|
+			ssi->cr_clk;
+
+		rsnd_mod_write(&ssi->mod, SSICR, cr | EN);
+		rsnd_ssi_status_check(&ssi->mod, DIRQ);
+
+		/*
+		 * disable SSI,
+		 * and, wait idle state
+		 */
+		rsnd_mod_write(&ssi->mod, SSICR, cr);	/* disabled all */
+		rsnd_ssi_status_check(&ssi->mod, IIRQ);
+
+		if (rsnd_rdai_is_clk_master(rdai)) {
+			if (rsnd_ssi_clk_from_parent(ssi))
+				rsnd_ssi_hw_stop(ssi->parent);
+			else
+				rsnd_ssi_master_clk_stop(ssi);
+		}
+
+		rsnd_mod_hw_stop(&ssi->mod);
+	}
+
+	dev_dbg(dev, "%s[%d] hw stopped\n",
+		rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod));
+}
+
+/*
+ *	SSI mod common functions
+ */
+static int rsnd_ssi_init(struct rsnd_mod *mod,
+			 struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	u32 cr;
+
+	cr = FORCE;
+
+	/*
+	 * always use 32bit system word for easy clock calculation.
+	 * see also rsnd_ssi_master_clk_enable()
+	 */
+	cr |= SWL_32;
+
+	/*
+	 * init clock settings for SSICR
+	 */
+	switch (runtime->sample_bits) {
+	case 16:
+		cr |= DWL_16;
+		break;
+	case 32:
+		cr |= DWL_24;
+		break;
+	default:
+		return -EIO;
+	}
+
+	if (rdai->bit_clk_inv)
+		cr |= SCKP;
+	if (rdai->frm_clk_inv)
+		cr |= SWSP;
+	if (rdai->data_alignment)
+		cr |= SDTA;
+	if (rdai->sys_delay)
+		cr |= DEL;
+	if (rsnd_io_is_play(io))
+		cr |= TRMD;
+
+	/*
+	 * set ssi parameter
+	 */
+	ssi->cr_own	= cr;
+	ssi->err	= -1; /* ignore 1st error */
+
+	return 0;
+}
+
+static int rsnd_ssi_quit(struct rsnd_mod *mod,
+			 struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+
+	if (ssi->err > 0)
+		dev_warn(dev, "%s[%d] under/over flow err = %d\n",
+			 rsnd_mod_name(mod), rsnd_mod_id(mod), ssi->err);
+
+	ssi->cr_own	= 0;
+	ssi->err	= 0;
+
+	return 0;
+}
+
+static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
+{
+	/* under/over flow error */
+	if (status & (UIRQ | OIRQ)) {
+		ssi->err++;
+
+		/* clear error status */
+		rsnd_mod_write(&ssi->mod, SSISR, 0);
+	}
+}
+
+static int rsnd_ssi_start(struct rsnd_mod *mod,
+			  struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+
+	rsnd_src_ssiu_start(mod, rsnd_ssi_use_busif(mod));
+
+	rsnd_ssi_hw_start(ssi, io);
+
+	rsnd_src_ssi_irq_enable(mod);
+
+	return 0;
+}
+
+static int rsnd_ssi_stop(struct rsnd_mod *mod,
+			 struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+
+	rsnd_src_ssi_irq_disable(mod);
+
+	rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
+
+	rsnd_ssi_hw_stop(ssi);
+
+	rsnd_src_ssiu_stop(mod);
+
+	return 0;
+}
+
+static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
+{
+	struct rsnd_ssi *ssi = data;
+	struct rsnd_mod *mod = &ssi->mod;
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+	int is_dma = rsnd_ssi_is_dma_mode(mod);
+	u32 status = rsnd_mod_read(mod, SSISR);
+
+	if (!io)
+		return IRQ_NONE;
+
+	/* PIO only */
+	if (!is_dma && (status & DIRQ)) {
+		struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+		u32 *buf = (u32 *)(runtime->dma_area +
+				   rsnd_dai_pointer_offset(io, 0));
+
+		/*
+		 * 8/16/32 data can be assesse to TDR/RDR register
+		 * directly as 32bit data
+		 * see rsnd_ssi_init()
+		 */
+		if (rsnd_io_is_play(io))
+			rsnd_mod_write(mod, SSITDR, *buf);
+		else
+			*buf = rsnd_mod_read(mod, SSIRDR);
+
+		rsnd_dai_pointer_update(io, sizeof(*buf));
+	}
+
+	/* PIO / DMA */
+	if (status & (UIRQ | OIRQ)) {
+		struct device *dev = rsnd_priv_to_dev(priv);
+
+		/*
+		 * restart SSI
+		 */
+		dev_dbg(dev, "%s[%d] restart\n",
+			rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+		rsnd_ssi_stop(mod, priv);
+		if (ssi->err < 1024)
+			rsnd_ssi_start(mod, priv);
+		else
+			dev_warn(dev, "no more SSI restart\n");
+	}
+
+	rsnd_ssi_record_error(ssi, status);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ *		SSI PIO
+ */
+static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
+			      struct rsnd_priv *priv)
+{
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	int ret;
+
+	ret = devm_request_irq(dev, ssi->info->irq,
+			       rsnd_ssi_interrupt,
+			       IRQF_SHARED,
+			       dev_name(dev), ssi);
+
+	return ret;
+}
+
+static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
+	.name	= SSI_NAME,
+	.probe	= rsnd_ssi_pio_probe,
+	.init	= rsnd_ssi_init,
+	.quit	= rsnd_ssi_quit,
+	.start	= rsnd_ssi_start,
+	.stop	= rsnd_ssi_stop,
+};
+
+static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
+			      struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	int dma_id = ssi->info->dma_id;
+	int ret;
+
+	ret = devm_request_irq(dev, ssi->info->irq,
+			       rsnd_ssi_interrupt,
+			       IRQF_SHARED,
+			       dev_name(dev), ssi);
+	if (ret)
+		return ret;
+
+	ret = rsnd_dma_init(
+		priv, rsnd_mod_to_dma(mod),
+		dma_id);
+
+	return ret;
+}
+
+static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
+			       struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	int irq = ssi->info->irq;
+
+	rsnd_dma_quit(rsnd_mod_to_dma(mod));
+
+	/* PIO will request IRQ again */
+	devm_free_irq(dev, irq, ssi);
+
+	return 0;
+}
+
+static int rsnd_ssi_fallback(struct rsnd_mod *mod,
+			     struct rsnd_priv *priv)
+{
+	struct device *dev = rsnd_priv_to_dev(priv);
+
+	/*
+	 * fallback to PIO
+	 *
+	 * SSI .probe might be called again.
+	 * see
+	 *	rsnd_rdai_continuance_probe()
+	 */
+	mod->ops = &rsnd_ssi_pio_ops;
+
+	dev_info(dev, "%s[%d] fallback to PIO mode\n",
+		 rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+	return 0;
+}
+
+static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
+			      struct rsnd_priv *priv)
+{
+	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+
+	rsnd_dma_start(dma);
+
+	rsnd_ssi_start(mod, priv);
+
+	return 0;
+}
+
+static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
+			     struct rsnd_priv *priv)
+{
+	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+
+	rsnd_ssi_stop(mod, priv);
+
+	rsnd_dma_stop(dma);
+
+	return 0;
+}
+
+static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_mod *mod)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
+	int is_play = rsnd_io_is_play(io);
+	char *name;
+
+	if (rsnd_ssi_use_busif(mod))
+		name = is_play ? "rxu" : "txu";
+	else
+		name = is_play ? "rx" : "tx";
+
+	return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
+					mod, name);
+}
+
+static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
+	.name	= SSI_NAME,
+	.dma_req = rsnd_ssi_dma_req,
+	.probe	= rsnd_ssi_dma_probe,
+	.remove	= rsnd_ssi_dma_remove,
+	.init	= rsnd_ssi_init,
+	.quit	= rsnd_ssi_quit,
+	.start	= rsnd_ssi_dma_start,
+	.stop	= rsnd_ssi_dma_stop,
+	.fallback = rsnd_ssi_fallback,
+};
+
+int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
+{
+	return mod->ops == &rsnd_ssi_dma_ops;
+}
+
+
+/*
+ *		Non SSI
+ */
+static struct rsnd_mod_ops rsnd_ssi_non_ops = {
+	.name	= SSI_NAME,
+};
+
+/*
+ *		ssi mod function
+ */
+struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
+{
+	if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
+		id = 0;
+
+	return &((struct rsnd_ssi *)(priv->ssi) + id)->mod;
+}
+
+int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
+{
+	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+
+	return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
+}
+
+static void rsnd_ssi_parent_clk_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi)
+{
+	if (!rsnd_ssi_is_pin_sharing(&ssi->mod))
+		return;
+
+	switch (rsnd_mod_id(&ssi->mod)) {
+	case 1:
+	case 2:
+		ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0));
+		break;
+	case 4:
+		ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3));
+		break;
+	case 8:
+		ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7));
+		break;
+	}
+}
+
+
+static void rsnd_of_parse_ssi(struct platform_device *pdev,
+			      const struct rsnd_of_data *of_data,
+			      struct rsnd_priv *priv)
+{
+	struct device_node *node;
+	struct device_node *np;
+	struct rsnd_ssi_platform_info *ssi_info;
+	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
+	struct device *dev = &pdev->dev;
+	int nr, i;
+
+	if (!of_data)
+		return;
+
+	node = rsnd_ssi_of_node(priv);
+	if (!node)
+		return;
+
+	nr = of_get_child_count(node);
+	if (!nr)
+		goto rsnd_of_parse_ssi_end;
+
+	ssi_info = devm_kzalloc(dev,
+				sizeof(struct rsnd_ssi_platform_info) * nr,
+				GFP_KERNEL);
+	if (!ssi_info) {
+		dev_err(dev, "ssi info allocation error\n");
+		goto rsnd_of_parse_ssi_end;
+	}
+
+	info->ssi_info		= ssi_info;
+	info->ssi_info_nr	= nr;
+
+	i = -1;
+	for_each_child_of_node(node, np) {
+		i++;
+
+		ssi_info = info->ssi_info + i;
+
+		/*
+		 * pin settings
+		 */
+		if (of_get_property(np, "shared-pin", NULL))
+			ssi_info->flags |= RSND_SSI_CLK_PIN_SHARE;
+
+		/*
+		 * irq
+		 */
+		ssi_info->irq = irq_of_parse_and_map(np, 0);
+
+		/*
+		 * DMA
+		 */
+		ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ?
+			0 : 1;
+
+		if (of_get_property(np, "no-busif", NULL))
+			ssi_info->flags |= RSND_SSI_NO_BUSIF;
+	}
+
+rsnd_of_parse_ssi_end:
+	of_node_put(node);
+}
+
+int rsnd_ssi_probe(struct platform_device *pdev,
+		   const struct rsnd_of_data *of_data,
+		   struct rsnd_priv *priv)
+{
+	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
+	struct rsnd_ssi_platform_info *pinfo;
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_mod_ops *ops;
+	struct clk *clk;
+	struct rsnd_ssi *ssi;
+	char name[RSND_SSI_NAME_SIZE];
+	int i, nr, ret;
+
+	rsnd_of_parse_ssi(pdev, of_data, priv);
+
+	/*
+	 *	init SSI
+	 */
+	nr	= info->ssi_info_nr;
+	ssi	= devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL);
+	if (!ssi) {
+		dev_err(dev, "SSI allocate failed\n");
+		return -ENOMEM;
+	}
+
+	priv->ssi	= ssi;
+	priv->ssi_nr	= nr;
+
+	for_each_rsnd_ssi(ssi, priv, i) {
+		pinfo = &info->ssi_info[i];
+
+		snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
+			 SSI_NAME, i);
+
+		clk = devm_clk_get(dev, name);
+		if (IS_ERR(clk))
+			return PTR_ERR(clk);
+
+		ssi->info	= pinfo;
+
+		ops = &rsnd_ssi_non_ops;
+		if (pinfo->dma_id > 0)
+			ops = &rsnd_ssi_dma_ops;
+		else if (rsnd_ssi_pio_available(ssi))
+			ops = &rsnd_ssi_pio_ops;
+
+		ret = rsnd_mod_init(&ssi->mod, ops, clk, RSND_MOD_SSI, i);
+		if (ret)
+			return ret;
+
+		rsnd_ssi_parent_clk_setup(priv, ssi);
+	}
+
+	return 0;
+}
+
+void rsnd_ssi_remove(struct platform_device *pdev,
+		     struct rsnd_priv *priv)
+{
+	struct rsnd_ssi *ssi;
+	int i;
+
+	for_each_rsnd_ssi(ssi, priv, i) {
+		rsnd_mod_quit(&ssi->mod);
+	}
+}