[deliverable/linux.git] / sound / soc / sh / rcar / ssi.c

/*
 * 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 clk *clk;
	struct rsnd_ssi_platform_info *info; /* rcar_snd.h */
	struct rsnd_ssi *parent;
	struct rsnd_mod mod;

	struct rsnd_dai *rdai;
	u32 cr_own;
	u32 cr_clk;
	u32 cr_etc;
	int err;
	unsigned int usrcnt;
	unsigned int rate;
};

#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->pio_irq > 0)
#define rsnd_ssi_dma_available(ssi) \
	rsnd_dma_available(rsnd_mod_to_dma(&(ssi)->mod))
#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)

static 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_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_mod_to_priv(&ssi->mod);
	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->rate	= rate;
				ssi->cr_clk	= FORCE | SWL_32 |
						  SCKD | SWSD | CKDV(j);

				dev_dbg(dev, "ssi%d outputs %u Hz\n",
					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->rate = 0;
	ssi->cr_clk = 0;
	rsnd_adg_ssi_clk_stop(&ssi->mod);
}

static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
			      struct rsnd_dai *rdai,
			      struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
	struct device *dev = rsnd_priv_to_dev(priv);
	u32 cr;

	if (0 == ssi->usrcnt) {
		clk_prepare_enable(ssi->clk);

		if (rsnd_dai_is_clk_master(rdai)) {
			if (rsnd_ssi_clk_from_parent(ssi))
				rsnd_ssi_hw_start(ssi->parent, rdai, io);
			else
				rsnd_ssi_master_clk_start(ssi, io);
		}
	}

	cr  =	ssi->cr_own	|
		ssi->cr_clk	|
		ssi->cr_etc	|
		EN;

	rsnd_mod_write(&ssi->mod, SSICR, cr);

	ssi->usrcnt++;

	dev_dbg(dev, "ssi%d hw started\n", rsnd_mod_id(&ssi->mod));
}

static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi,
			     struct rsnd_dai *rdai)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
	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_dai_is_clk_master(rdai)) {
			if (rsnd_ssi_clk_from_parent(ssi))
				rsnd_ssi_hw_stop(ssi->parent, rdai);
			else
				rsnd_ssi_master_clk_stop(ssi);
		}

		clk_disable_unprepare(ssi->clk);
	}

	dev_dbg(dev, "ssi%d hw stopped\n", rsnd_mod_id(&ssi->mod));
}

/*
 *	SSI mod common functions
 */
static int rsnd_ssi_init(struct rsnd_mod *mod,
			 struct rsnd_dai *rdai)
{
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
	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_dai_is_play(rdai, io))
		cr |= TRMD;

	/*
	 * set ssi parameter
	 */
	ssi->rdai	= rdai;
	ssi->cr_own	= cr;
	ssi->err	= -1; /* ignore 1st error */

	return 0;
}

static int rsnd_ssi_quit(struct rsnd_mod *mod,
			 struct rsnd_dai *rdai)
{
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct device *dev = rsnd_priv_to_dev(priv);

	if (ssi->err > 0)
		dev_warn(dev, "ssi under/over flow err = %d\n", ssi->err);

	ssi->rdai	= NULL;
	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);
	}
}

/*
 *		SSI PIO
 */
static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data)
{
	struct rsnd_ssi *ssi = data;
	struct rsnd_mod *mod = &ssi->mod;
	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
	u32 status = rsnd_mod_read(mod, SSISR);
	irqreturn_t ret = IRQ_NONE;

	if (io && (status & DIRQ)) {
		struct rsnd_dai *rdai = ssi->rdai;
		struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
		u32 *buf = (u32 *)(runtime->dma_area +
				   rsnd_dai_pointer_offset(io, 0));

		rsnd_ssi_record_error(ssi, status);

		/*
		 * 8/16/32 data can be assesse to TDR/RDR register
		 * directly as 32bit data
		 * see rsnd_ssi_init()
		 */
		if (rsnd_dai_is_play(rdai, io))
			rsnd_mod_write(mod, SSITDR, *buf);
		else
			*buf = rsnd_mod_read(mod, SSIRDR);

		rsnd_dai_pointer_update(io, sizeof(*buf));

		ret = IRQ_HANDLED;
	}

	return ret;
}

static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
			      struct rsnd_dai *rdai)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	int irq = ssi->info->pio_irq;
	int ret;

	ret = devm_request_irq(dev, irq,
			       rsnd_ssi_pio_interrupt,
			       IRQF_SHARED,
			       dev_name(dev), ssi);
	if (ret)
		dev_err(dev, "SSI request interrupt failed\n");

	dev_dbg(dev, "%s (PIO) is probed\n", rsnd_mod_name(mod));

	return ret;
}

static int rsnd_ssi_pio_start(struct rsnd_mod *mod,
			      struct rsnd_dai *rdai)
{
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);

	/* enable PIO IRQ */
	ssi->cr_etc = UIEN | OIEN | DIEN;

	rsnd_src_ssiu_start(mod, rdai, 0);

	rsnd_src_enable_ssi_irq(mod, rdai);

	rsnd_ssi_hw_start(ssi, rdai, io);

	return 0;
}

static int rsnd_ssi_pio_stop(struct rsnd_mod *mod,
			     struct rsnd_dai *rdai)
{
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);

	ssi->cr_etc = 0;

	rsnd_ssi_hw_stop(ssi, rdai);

	rsnd_src_ssiu_stop(mod, rdai, 0);

	return 0;
}

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_pio_start,
	.stop	= rsnd_ssi_pio_stop,
};

static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
			  struct rsnd_dai *rdai)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	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 = rsnd_dma_init(
		priv, rsnd_mod_to_dma(mod),
		rsnd_info_is_playback(priv, ssi),
		dma_id);

	if (ret < 0)
		dev_err(dev, "SSI DMA failed\n");

	dev_dbg(dev, "%s (DMA) is probed\n", rsnd_mod_name(mod));

	return ret;
}

static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
			       struct rsnd_dai *rdai)
{
	rsnd_dma_quit(rsnd_mod_to_priv(mod), rsnd_mod_to_dma(mod));

	return 0;
}

static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
			      struct rsnd_dai *rdai)
{
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);
	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);

	/* enable DMA transfer */
	ssi->cr_etc = DMEN;

	rsnd_src_ssiu_start(mod, rdai, rsnd_ssi_use_busif(mod));

	rsnd_dma_start(dma);

	rsnd_ssi_hw_start(ssi, ssi->rdai, io);

	/* enable WS continue */
	if (rsnd_dai_is_clk_master(rdai))
		rsnd_mod_write(&ssi->mod, SSIWSR, CONT);

	return 0;
}

static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
			     struct rsnd_dai *rdai)
{
	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);

	ssi->cr_etc = 0;

	rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));

	rsnd_ssi_hw_stop(ssi, rdai);

	rsnd_dma_stop(dma);

	rsnd_src_ssiu_stop(mod, rdai, 1);

	return 0;
}

static char *rsnd_ssi_dma_name(struct rsnd_mod *mod)
{
	return rsnd_ssi_use_busif(mod) ? "ssiu" : SSI_NAME;
}

static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
	.name	= SSI_NAME,
	.dma_name = rsnd_ssi_dma_name,
	.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,
};

/*
 *		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 = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
	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->pio_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;

	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;
		ssi->clk	= clk;

		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;

		rsnd_mod_init(priv, &ssi->mod, ops, RSND_MOD_SSI, i);

		rsnd_ssi_parent_clk_setup(priv, ssi);
	}

	return 0;
}
Commit	Line	Data
ae5c3223 KM	1	/*
	2	* Renesas R-Car SSIU/SSI support
	3	*
	4	* Copyright (C) 2013 Renesas Solutions Corp.
	5	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
	6	*
	7	* Based on fsi.c
	8	* Kuninori Morimoto <morimoto.kuninori@renesas.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14	#include <linux/delay.h>
	15	#include "rsnd.h"
	16	#define RSND_SSI_NAME_SIZE 16
	17
	18	/*
	19	* SSICR
	20	*/
	21	#define FORCE (1 << 31) /* Fixed */
849fc82a	22	#define DMEN (1 << 28) /* DMA Enable */
ae5c3223 KM	23	#define UIEN (1 << 27) /* Underflow Interrupt Enable */
	24	#define OIEN (1 << 26) /* Overflow Interrupt Enable */
	25	#define IIEN (1 << 25) /* Idle Mode Interrupt Enable */
	26	#define DIEN (1 << 24) /* Data Interrupt Enable */
	27
	28	#define DWL_8 (0 << 19) /* Data Word Length */
	29	#define DWL_16 (1 << 19) /* Data Word Length */
	30	#define DWL_18 (2 << 19) /* Data Word Length */
	31	#define DWL_20 (3 << 19) /* Data Word Length */
	32	#define DWL_22 (4 << 19) /* Data Word Length */
	33	#define DWL_24 (5 << 19) /* Data Word Length */
	34	#define DWL_32 (6 << 19) /* Data Word Length */
	35
	36	#define SWL_32 (3 << 16) /* R/W System Word Length */
	37	#define SCKD (1 << 15) /* Serial Bit Clock Direction */
	38	#define SWSD (1 << 14) /* Serial WS Direction */
	39	#define SCKP (1 << 13) /* Serial Bit Clock Polarity */
	40	#define SWSP (1 << 12) /* Serial WS Polarity */
	41	#define SDTA (1 << 10) /* Serial Data Alignment */
	42	#define DEL (1 << 8) /* Serial Data Delay */
	43	#define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
	44	#define TRMD (1 << 1) /* Transmit/Receive Mode Select */
	45	#define EN (1 << 0) /* SSI Module Enable */
	46
	47	/*
	48	* SSISR
	49	*/
	50	#define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
	51	#define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
	52	#define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
	53	#define DIRQ (1 << 24) /* Data Interrupt Status Flag */
	54
849fc82a KM	55	/*
	56	* SSIWSR
	57	*/
	58	#define CONT (1 << 8) /* WS Continue Function */
	59
8aefda50 KM	60	#define SSI_NAME "ssi"
8aefda50 KM	61
ae5c3223 KM	62	struct rsnd_ssi {
	63	struct clk *clk;
	64	struct rsnd_ssi_platform_info info; / rcar_snd.h */
	65	struct rsnd_ssi *parent;
	66	struct rsnd_mod mod;
	67
	68	struct rsnd_dai *rdai;
ae5c3223 KM	69	u32 cr_own;
	70	u32 cr_clk;
	71	u32 cr_etc;
	72	int err;
	73	unsigned int usrcnt;
	74	unsigned int rate;
	75	};
	76
ae5c3223 KM	77	#define for_each_rsnd_ssi(pos, priv, i) \
	78	for (i = 0; \
	79	(i < rsnd_ssi_nr(priv)) && \
dd27d808	80	((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
ae5c3223 KM	81	i++)
ae5c3223 KM	82
dd27d808	83	#define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
ae5c3223	84	#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
849fc82a KM	85	#define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma))
	86	#define rsnd_ssi_pio_available(ssi) ((ssi)->info->pio_irq > 0)
	87	#define rsnd_ssi_dma_available(ssi) \
	88	rsnd_dma_available(rsnd_mod_to_dma(&(ssi)->mod))
ae5c3223	89	#define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent)
ae5c3223	90	#define rsnd_ssi_mode_flags(p) ((p)->info->flags)
4b4dab82	91	#define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id)
ae5c3223	92
d9288d0b KM	93	static int rsnd_ssi_use_busif(struct rsnd_mod *mod)
	94	{
	95	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	96	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
	97	int use_busif = 0;
	98
	99	if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF))
	100	use_busif = 1;
	101	if (rsnd_io_to_mod_src(io))
	102	use_busif = 1;
	103
	104	return use_busif;
	105	}
	106
ae5c3223 KM	107	static void rsnd_ssi_status_check(struct rsnd_mod *mod,
	108	u32 bit)
	109	{
	110	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	111	struct device *dev = rsnd_priv_to_dev(priv);
	112	u32 status;
	113	int i;
	114
	115	for (i = 0; i < 1024; i++) {
	116	status = rsnd_mod_read(mod, SSISR);
	117	if (status & bit)
	118	return;
	119
	120	udelay(50);
	121	}
	122
	123	dev_warn(dev, "status check failed\n");
	124	}
	125
	126	static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi,
adcf7d5e	127	struct rsnd_dai_stream *io)
ae5c3223 KM	128	{
ae5c3223 KM	129	struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
adcf7d5e	130	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
ae5c3223 KM	131	struct device *dev = rsnd_priv_to_dev(priv);
	132	int i, j, ret;
	133	int adg_clk_div_table[] = {
	134	1, 6, /* see adg.c */
	135	};
	136	int ssi_clk_mul_table[] = {
	137	1, 2, 4, 8, 16, 6, 12,
	138	};
	139	unsigned int main_rate;
ba9c949f	140	unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime);
ae5c3223 KM	141
	142	/*
	143	* Find best clock, and try to start ADG
	144	*/
	145	for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) {
	146	for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
	147
	148	/*
	149	* this driver is assuming that
	150	* system word is 64fs (= 2 x 32bit)
729aca51	151	* see rsnd_ssi_init()
ae5c3223 KM	152	*/
	153	main_rate = rate / adg_clk_div_table[i]
	154	* 32 * 2 * ssi_clk_mul_table[j];
	155
	156	ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate);
	157	if (0 == ret) {
	158	ssi->rate = rate;
	159	ssi->cr_clk = FORCE \| SWL_32 \|
	160	SCKD \| SWSD \| CKDV(j);
	161
	162	dev_dbg(dev, "ssi%d outputs %u Hz\n",
	163	rsnd_mod_id(&ssi->mod), rate);
	164
	165	return 0;
	166	}
	167	}
	168	}
	169
	170	dev_err(dev, "unsupported clock rate\n");
	171	return -EIO;
	172	}
	173
	174	static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi)
	175	{
	176	ssi->rate = 0;
	177	ssi->cr_clk = 0;
	178	rsnd_adg_ssi_clk_stop(&ssi->mod);
	179	}
	180
	181	static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
	182	struct rsnd_dai *rdai,
	183	struct rsnd_dai_stream *io)
	184	{
	185	struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
	186	struct device *dev = rsnd_priv_to_dev(priv);
	187	u32 cr;
	188
	189	if (0 == ssi->usrcnt) {
79861bbb	190	clk_prepare_enable(ssi->clk);
ae5c3223	191
e779a20d	192	if (rsnd_dai_is_clk_master(rdai)) {
ae5c3223 KM	193	if (rsnd_ssi_clk_from_parent(ssi))
	194	rsnd_ssi_hw_start(ssi->parent, rdai, io);
	195	else
adcf7d5e	196	rsnd_ssi_master_clk_start(ssi, io);
ae5c3223 KM	197	}
	198	}
	199
	200	cr = ssi->cr_own \|
	201	ssi->cr_clk \|
	202	ssi->cr_etc \|
	203	EN;
	204
	205	rsnd_mod_write(&ssi->mod, SSICR, cr);
	206
	207	ssi->usrcnt++;
	208
	209	dev_dbg(dev, "ssi%d hw started\n", rsnd_mod_id(&ssi->mod));
	210	}
	211
	212	static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi,
	213	struct rsnd_dai *rdai)
	214	{
	215	struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
	216	struct device *dev = rsnd_priv_to_dev(priv);
	217	u32 cr;
	218
	219	if (0 == ssi->usrcnt) /* stop might be called without start */
	220	return;
	221
	222	ssi->usrcnt--;
	223
	224	if (0 == ssi->usrcnt) {
	225	/*
	226	* disable all IRQ,
	227	* and, wait all data was sent
	228	*/
	229	cr = ssi->cr_own \|
	230	ssi->cr_clk;
	231
	232	rsnd_mod_write(&ssi->mod, SSICR, cr \| EN);
	233	rsnd_ssi_status_check(&ssi->mod, DIRQ);
	234
	235	/*
	236	* disable SSI,
	237	* and, wait idle state
	238	*/
	239	rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */
	240	rsnd_ssi_status_check(&ssi->mod, IIRQ);
	241
e779a20d	242	if (rsnd_dai_is_clk_master(rdai)) {
ae5c3223 KM	243	if (rsnd_ssi_clk_from_parent(ssi))
	244	rsnd_ssi_hw_stop(ssi->parent, rdai);
	245	else
	246	rsnd_ssi_master_clk_stop(ssi);
	247	}
	248
79861bbb	249	clk_disable_unprepare(ssi->clk);
ae5c3223 KM	250	}
	251
	252	dev_dbg(dev, "ssi%d hw stopped\n", rsnd_mod_id(&ssi->mod));
	253	}
	254
	255	/*
	256	* SSI mod common functions
	257	*/
	258	static int rsnd_ssi_init(struct rsnd_mod *mod,
b42fccf6	259	struct rsnd_dai *rdai)
ae5c3223 KM	260	{
ae5c3223 KM	261	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
b42fccf6	262	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
ae5c3223 KM	263	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	264	u32 cr;
	265
	266	cr = FORCE;
	267
	268	/*
	269	* always use 32bit system word for easy clock calculation.
	270	* see also rsnd_ssi_master_clk_enable()
	271	*/
	272	cr \|= SWL_32;
	273
	274	/*
	275	* init clock settings for SSICR
	276	*/
	277	switch (runtime->sample_bits) {
	278	case 16:
	279	cr \|= DWL_16;
	280	break;
	281	case 32:
	282	cr \|= DWL_24;
	283	break;
	284	default:
	285	return -EIO;
	286	}
	287
	288	if (rdai->bit_clk_inv)
	289	cr \|= SCKP;
	290	if (rdai->frm_clk_inv)
	291	cr \|= SWSP;
	292	if (rdai->data_alignment)
	293	cr \|= SDTA;
	294	if (rdai->sys_delay)
	295	cr \|= DEL;
	296	if (rsnd_dai_is_play(rdai, io))
	297	cr \|= TRMD;
	298
	299	/*
	300	* set ssi parameter
	301	*/
	302	ssi->rdai = rdai;
ae5c3223 KM	303	ssi->cr_own = cr;
	304	ssi->err = -1; /* ignore 1st error */
	305
ae5c3223 KM	306	return 0;
	307	}
	308
	309	static int rsnd_ssi_quit(struct rsnd_mod *mod,
b42fccf6	310	struct rsnd_dai *rdai)
ae5c3223 KM	311	{
	312	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	313	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	314	struct device *dev = rsnd_priv_to_dev(priv);
	315
ae5c3223 KM	316	if (ssi->err > 0)
	317	dev_warn(dev, "ssi under/over flow err = %d\n", ssi->err);
	318
	319	ssi->rdai = NULL;
ae5c3223 KM	320	ssi->cr_own = 0;
	321	ssi->err = 0;
	322
	323	return 0;
	324	}
	325
	326	static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
	327	{
	328	/* under/over flow error */
	329	if (status & (UIRQ \| OIRQ)) {
	330	ssi->err++;
	331
	332	/* clear error status */
	333	rsnd_mod_write(&ssi->mod, SSISR, 0);
	334	}
	335	}
	336
	337	/*
	338	* SSI PIO
	339	*/
	340	static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data)
	341	{
	342	struct rsnd_ssi *ssi = data;
4686a0ad KM	343	struct rsnd_mod *mod = &ssi->mod;
	344	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
	345	u32 status = rsnd_mod_read(mod, SSISR);
ae5c3223 KM	346	irqreturn_t ret = IRQ_NONE;
	347
	348	if (io && (status & DIRQ)) {
	349	struct rsnd_dai *rdai = ssi->rdai;
	350	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	351	u32 buf = (u32 )(runtime->dma_area +
	352	rsnd_dai_pointer_offset(io, 0));
	353
	354	rsnd_ssi_record_error(ssi, status);
	355
	356	/*
	357	* 8/16/32 data can be assesse to TDR/RDR register
	358	* directly as 32bit data
	359	* see rsnd_ssi_init()
	360	*/
	361	if (rsnd_dai_is_play(rdai, io))
4686a0ad	362	rsnd_mod_write(mod, SSITDR, *buf);
ae5c3223	363	else
4686a0ad	364	*buf = rsnd_mod_read(mod, SSIRDR);
ae5c3223 KM	365
	366	rsnd_dai_pointer_update(io, sizeof(*buf));
	367
	368	ret = IRQ_HANDLED;
	369	}
	370
	371	return ret;
	372	}
	373
ff8f30e6	374	static int rsnd_ssi_pio_probe(struct rsnd_mod *mod,
b42fccf6	375	struct rsnd_dai *rdai)
ff8f30e6 KM	376	{
	377	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	378	struct device *dev = rsnd_priv_to_dev(priv);
	379	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	380	int irq = ssi->info->pio_irq;
	381	int ret;
	382
	383	ret = devm_request_irq(dev, irq,
	384	rsnd_ssi_pio_interrupt,
	385	IRQF_SHARED,
	386	dev_name(dev), ssi);
	387	if (ret)
	388	dev_err(dev, "SSI request interrupt failed\n");
	389
8aefda50 KM	390	dev_dbg(dev, "%s (PIO) is probed\n", rsnd_mod_name(mod));
8aefda50 KM	391
ff8f30e6 KM	392	return ret;
	393	}
	394
ae5c3223	395	static int rsnd_ssi_pio_start(struct rsnd_mod *mod,
b42fccf6	396	struct rsnd_dai *rdai)
ae5c3223	397	{
ae5c3223	398	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
b42fccf6	399	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
ae5c3223 KM	400
	401	/* enable PIO IRQ */
	402	ssi->cr_etc = UIEN \| OIEN \| DIEN;
	403
d9288d0b KM	404	rsnd_src_ssiu_start(mod, rdai, 0);
d9288d0b KM	405
b42fccf6	406	rsnd_src_enable_ssi_irq(mod, rdai);
b8cc41e9	407
ae5c3223 KM	408	rsnd_ssi_hw_start(ssi, rdai, io);
ae5c3223 KM	409
ae5c3223 KM	410	return 0;
	411	}
	412
	413	static int rsnd_ssi_pio_stop(struct rsnd_mod *mod,
b42fccf6	414	struct rsnd_dai *rdai)
ae5c3223	415	{
ae5c3223 KM	416	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
ae5c3223 KM	417
ae5c3223 KM	418	ssi->cr_etc = 0;
	419
	420	rsnd_ssi_hw_stop(ssi, rdai);
	421
d9288d0b KM	422	rsnd_src_ssiu_stop(mod, rdai, 0);
d9288d0b KM	423
ae5c3223 KM	424	return 0;
	425	}
	426
	427	static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
8aefda50	428	.name = SSI_NAME,
ff8f30e6	429	.probe = rsnd_ssi_pio_probe,
ae5c3223 KM	430	.init = rsnd_ssi_init,
	431	.quit = rsnd_ssi_quit,
	432	.start = rsnd_ssi_pio_start,
	433	.stop = rsnd_ssi_pio_stop,
	434	};
	435
ff8f30e6	436	static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
b42fccf6	437	struct rsnd_dai *rdai)
ff8f30e6 KM	438	{
	439	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	440	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
ff8f30e6 KM	441	struct device *dev = rsnd_priv_to_dev(priv);
ff8f30e6 KM	442	int dma_id = ssi->info->dma_id;
ff8f30e6 KM	443	int ret;
ff8f30e6 KM	444
ff8f30e6 KM	445	ret = rsnd_dma_init(
ff8f30e6 KM	446	priv, rsnd_mod_to_dma(mod),
29e69fd2	447	rsnd_info_is_playback(priv, ssi),
ff8f30e6 KM	448	dma_id);
	449
	450	if (ret < 0)
	451	dev_err(dev, "SSI DMA failed\n");
	452
8aefda50 KM	453	dev_dbg(dev, "%s (DMA) is probed\n", rsnd_mod_name(mod));
8aefda50 KM	454
ff8f30e6 KM	455	return ret;
	456	}
	457
	458	static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
b42fccf6	459	struct rsnd_dai *rdai)
ff8f30e6 KM	460	{
	461	rsnd_dma_quit(rsnd_mod_to_priv(mod), rsnd_mod_to_dma(mod));
	462
	463	return 0;
	464	}
	465
849fc82a	466	static int rsnd_ssi_dma_start(struct rsnd_mod *mod,
b42fccf6	467	struct rsnd_dai *rdai)
849fc82a KM	468	{
	469	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	470	struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);
b42fccf6	471	struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
849fc82a KM	472
	473	/* enable DMA transfer */
	474	ssi->cr_etc = DMEN;
849fc82a	475
d9288d0b KM	476	rsnd_src_ssiu_start(mod, rdai, rsnd_ssi_use_busif(mod));
d9288d0b KM	477
849fc82a KM	478	rsnd_dma_start(dma);
	479
	480	rsnd_ssi_hw_start(ssi, ssi->rdai, io);
	481
	482	/* enable WS continue */
e779a20d	483	if (rsnd_dai_is_clk_master(rdai))
849fc82a KM	484	rsnd_mod_write(&ssi->mod, SSIWSR, CONT);
	485
	486	return 0;
	487	}
	488
	489	static int rsnd_ssi_dma_stop(struct rsnd_mod *mod,
b42fccf6	490	struct rsnd_dai *rdai)
849fc82a KM	491	{
	492	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	493	struct rsnd_dma *dma = rsnd_mod_to_dma(&ssi->mod);
	494
	495	ssi->cr_etc = 0;
	496
4686a0ad KM	497	rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR));
4686a0ad KM	498
849fc82a KM	499	rsnd_ssi_hw_stop(ssi, rdai);
	500
	501	rsnd_dma_stop(dma);
	502
d9288d0b KM	503	rsnd_src_ssiu_stop(mod, rdai, 1);
d9288d0b KM	504
849fc82a KM	505	return 0;
	506	}
	507
d9288d0b KM	508	static char rsnd_ssi_dma_name(struct rsnd_mod mod)
	509	{
	510	return rsnd_ssi_use_busif(mod) ? "ssiu" : SSI_NAME;
	511	}
	512
849fc82a	513	static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
8aefda50	514	.name = SSI_NAME,
d9288d0b	515	.dma_name = rsnd_ssi_dma_name,
ff8f30e6 KM	516	.probe = rsnd_ssi_dma_probe,
ff8f30e6 KM	517	.remove = rsnd_ssi_dma_remove,
849fc82a KM	518	.init = rsnd_ssi_init,
	519	.quit = rsnd_ssi_quit,
	520	.start = rsnd_ssi_dma_start,
	521	.stop = rsnd_ssi_dma_stop,
	522	};
	523
ae5c3223 KM	524	/*
	525	* Non SSI
	526	*/
ae5c3223	527	static struct rsnd_mod_ops rsnd_ssi_non_ops = {
8aefda50	528	.name = SSI_NAME,
ae5c3223 KM	529	};
	530
	531	/*
	532	* ssi mod function
	533	*/
	534	struct rsnd_mod rsnd_ssi_mod_get(struct rsnd_priv priv, int id)
	535	{
8b14719b TI	536	if (WARN_ON(id < 0 \|\| id >= rsnd_ssi_nr(priv)))
8b14719b TI	537	id = 0;
ae5c3223	538
dd27d808	539	return &((struct rsnd_ssi *)(priv->ssi) + id)->mod;
ae5c3223 KM	540	}
ae5c3223 KM	541
7b5ce975 KM	542	int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
	543	{
	544	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
	545
	546	return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE);
	547	}
	548
	549	static void rsnd_ssi_parent_clk_setup(struct rsnd_priv priv, struct rsnd_ssi ssi)
	550	{
	551	if (!rsnd_ssi_is_pin_sharing(&ssi->mod))
	552	return;
	553
	554	switch (rsnd_mod_id(&ssi->mod)) {
	555	case 1:
	556	case 2:
	557	ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0));
	558	break;
	559	case 4:
	560	ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 3));
	561	break;
	562	case 8:
	563	ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 7));
	564	break;
	565	}
	566	}
	567
90e8e50f KM	568
	569	static void rsnd_of_parse_ssi(struct platform_device *pdev,
	570	const struct rsnd_of_data *of_data,
	571	struct rsnd_priv *priv)
	572	{
	573	struct device_node *node;
	574	struct device_node *np;
	575	struct rsnd_ssi_platform_info *ssi_info;
	576	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	577	struct device *dev = &pdev->dev;
	578	int nr, i;
	579
	580	if (!of_data)
	581	return;
	582
	583	node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
	584	if (!node)
	585	return;
	586
	587	nr = of_get_child_count(node);
	588	if (!nr)
f451e48d	589	goto rsnd_of_parse_ssi_end;
90e8e50f KM	590
	591	ssi_info = devm_kzalloc(dev,
	592	sizeof(struct rsnd_ssi_platform_info) * nr,
	593	GFP_KERNEL);
	594	if (!ssi_info) {
	595	dev_err(dev, "ssi info allocation error\n");
f451e48d	596	goto rsnd_of_parse_ssi_end;
90e8e50f KM	597	}
	598
	599	info->ssi_info = ssi_info;
	600	info->ssi_info_nr = nr;
	601
	602	i = -1;
	603	for_each_child_of_node(node, np) {
	604	i++;
	605
	606	ssi_info = info->ssi_info + i;
	607
	608	/*
	609	* pin settings
	610	*/
	611	if (of_get_property(np, "shared-pin", NULL))
	612	ssi_info->flags \|= RSND_SSI_CLK_PIN_SHARE;
	613
	614	/*
	615	* irq
	616	*/
	617	ssi_info->pio_irq = irq_of_parse_and_map(np, 0);
199e7688 KM	618
	619	/*
	620	* DMA
	621	*/
	622	ssi_info->dma_id = of_get_property(np, "pio-transfer", NULL) ?
	623	0 : 1;
d9288d0b KM	624
	625	if (of_get_property(np, "no-busif", NULL))
	626	ssi_info->flags \|= RSND_SSI_NO_BUSIF;
90e8e50f	627	}
f451e48d KM	628
	629	rsnd_of_parse_ssi_end:
	630	of_node_put(node);
90e8e50f KM	631	}
90e8e50f KM	632
ae5c3223	633	int rsnd_ssi_probe(struct platform_device *pdev,
90e8e50f	634	const struct rsnd_of_data *of_data,
ae5c3223 KM	635	struct rsnd_priv *priv)
ae5c3223 KM	636	{
5da39cf3	637	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
ae5c3223 KM	638	struct rsnd_ssi_platform_info *pinfo;
	639	struct device *dev = rsnd_priv_to_dev(priv);
	640	struct rsnd_mod_ops *ops;
	641	struct clk *clk;
ae5c3223 KM	642	struct rsnd_ssi *ssi;
ae5c3223 KM	643	char name[RSND_SSI_NAME_SIZE];
ff8f30e6	644	int i, nr;
ae5c3223	645
90e8e50f KM	646	rsnd_of_parse_ssi(pdev, of_data, priv);
90e8e50f KM	647
ae5c3223 KM	648	/*
	649	* init SSI
	650	*/
	651	nr = info->ssi_info_nr;
dd27d808 KM	652	ssi = devm_kzalloc(dev, sizeof(ssi) nr, GFP_KERNEL);
dd27d808 KM	653	if (!ssi) {
ae5c3223 KM	654	dev_err(dev, "SSI allocate failed\n");
	655	return -ENOMEM;
	656	}
	657
dd27d808 KM	658	priv->ssi = ssi;
dd27d808 KM	659	priv->ssi_nr = nr;
ae5c3223 KM	660
	661	for_each_rsnd_ssi(ssi, priv, i) {
	662	pinfo = &info->ssi_info[i];
	663
8aefda50 KM	664	snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
8aefda50 KM	665	SSI_NAME, i);
ae5c3223	666
60dbb4f1	667	clk = devm_clk_get(dev, name);
ae5c3223 KM	668	if (IS_ERR(clk))
	669	return PTR_ERR(clk);
	670
	671	ssi->info = pinfo;
	672	ssi->clk = clk;
	673
	674	ops = &rsnd_ssi_non_ops;
ff8f30e6 KM	675	if (pinfo->dma_id > 0)
	676	ops = &rsnd_ssi_dma_ops;
	677	else if (rsnd_ssi_pio_available(ssi))
	678	ops = &rsnd_ssi_pio_ops;
ae5c3223	679
a126021d	680	rsnd_mod_init(priv, &ssi->mod, ops, RSND_MOD_SSI, i);
7b5ce975 KM	681
7b5ce975 KM	682	rsnd_ssi_parent_clk_setup(priv, ssi);
ae5c3223 KM	683	}
ae5c3223 KM	684
ae5c3223 KM	685	return 0;
ae5c3223 KM	686	}