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

/*
 * Renesas R-Car SRU/SCU/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.
 */

/*
 * Renesas R-Car sound device structure
 *
 * Gen1
 *
 * SRU		: Sound Routing Unit
 *  - SRC	: Sampling Rate Converter
 *  - CMD
 *    - CTU	: Channel Count Conversion Unit
 *    - MIX	: Mixer
 *    - DVC	: Digital Volume and Mute Function
 *  - SSI	: Serial Sound Interface
 *
 * Gen2
 *
 * SCU		: Sampling Rate Converter Unit
 *  - SRC	: Sampling Rate Converter
 *  - CMD
 *   - CTU	: Channel Count Conversion Unit
 *   - MIX	: Mixer
 *   - DVC	: Digital Volume and Mute Function
 * SSIU		: Serial Sound Interface Unit
 *  - SSI	: Serial Sound Interface
 */

/*
 *	driver data Image
 *
 * rsnd_priv
 *   |
 *   | ** this depends on Gen1/Gen2
 *   |
 *   +- gen
 *   |
 *   | ** these depend on data path
 *   | ** gen and platform data control it
 *   |
 *   +- rdai[0]
 *   |   |		 sru     ssiu      ssi
 *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 *   |   |
 *   |   |		 sru     ssiu      ssi
 *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 *   |
 *   +- rdai[1]
 *   |   |		 sru     ssiu      ssi
 *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 *   |   |
 *   |   |		 sru     ssiu      ssi
 *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 *   ...
 *   |
 *   | ** these control ssi
 *   |
 *   +- ssi
 *   |  |
 *   |  +- ssi[0]
 *   |  +- ssi[1]
 *   |  +- ssi[2]
 *   |  ...
 *   |
 *   | ** these control scu
 *   |
 *   +- scu
 *      |
 *      +- scu[0]
 *      +- scu[1]
 *      +- scu[2]
 *      ...
 *
 *
 * for_each_rsnd_dai(xx, priv, xx)
 *  rdai[0] => rdai[1] => rdai[2] => ...
 *
 * for_each_rsnd_mod(xx, rdai, xx)
 *  [mod] => [mod] => [mod] => ...
 *
 * rsnd_dai_call(xxx, fn )
 *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
 *
 */
#include <linux/pm_runtime.h>
#include "rsnd.h"

#define RSND_RATES SNDRV_PCM_RATE_8000_96000
#define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)

/*
 *	rsnd_platform functions
 */
#define rsnd_platform_call(priv, dai, func, param...)	\
	(!(priv->info->func) ? -ENODEV :		\
	 priv->info->func(param))


/*
 *	basic function
 */
u32 rsnd_read(struct rsnd_priv *priv,
	      struct rsnd_mod *mod, enum rsnd_reg reg)
{
	void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);

	BUG_ON(!base);

	return ioread32(base);
}

void rsnd_write(struct rsnd_priv *priv,
		struct rsnd_mod *mod,
		enum rsnd_reg reg, u32 data)
{
	void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
	struct device *dev = rsnd_priv_to_dev(priv);

	BUG_ON(!base);

	dev_dbg(dev, "w %p : %08x\n", base, data);

	iowrite32(data, base);
}

void rsnd_bset(struct rsnd_priv *priv, struct rsnd_mod *mod,
	       enum rsnd_reg reg, u32 mask, u32 data)
{
	void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
	struct device *dev = rsnd_priv_to_dev(priv);
	u32 val;

	BUG_ON(!base);

	val = ioread32(base);
	val &= ~mask;
	val |= data & mask;
	iowrite32(val, base);

	dev_dbg(dev, "s %p : %08x\n", base, val);
}

/*
 *	rsnd_mod functions
 */
char *rsnd_mod_name(struct rsnd_mod *mod)
{
	if (!mod || !mod->ops)
		return "unknown";

	return mod->ops->name;
}

void rsnd_mod_init(struct rsnd_priv *priv,
		   struct rsnd_mod *mod,
		   struct rsnd_mod_ops *ops,
		   int id)
{
	mod->priv	= priv;
	mod->id		= id;
	mod->ops	= ops;
	INIT_LIST_HEAD(&mod->list);
}

/*
 *	rsnd_dai functions
 */
#define rsnd_dai_call(rdai, io, fn)			\
({							\
	struct rsnd_mod *mod, *n;			\
	int ret = 0;					\
	for_each_rsnd_mod(mod, n, io) {			\
		ret = rsnd_mod_call(mod, fn, rdai, io);	\
		if (ret < 0)				\
			break;				\
	}						\
	ret;						\
})

int rsnd_dai_connect(struct rsnd_dai *rdai,
		     struct rsnd_mod *mod,
		     struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct device *dev = rsnd_priv_to_dev(priv);

	if (!mod) {
		dev_err(dev, "NULL mod\n");
		return -EIO;
	}

	if (!list_empty(&mod->list)) {
		dev_err(dev, "%s%d is not empty\n",
			rsnd_mod_name(mod),
			rsnd_mod_id(mod));
		return -EIO;
	}

	list_add_tail(&mod->list, &io->head);

	return 0;
}

int rsnd_dai_disconnect(struct rsnd_mod *mod)
{
	list_del_init(&mod->list);

	return 0;
}

struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
{
	return priv->rdai + id;
}

static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
{
	struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);

	return rsnd_dai_get(priv, dai->id);
}

int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
{
	return &rdai->playback == io;
}

/*
 *	rsnd_soc_dai functions
 */
int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
{
	struct snd_pcm_substream *substream = io->substream;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int pos = io->byte_pos + additional;

	pos %= (runtime->periods * io->byte_per_period);

	return pos;
}

void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
{
	io->byte_pos += byte;

	if (io->byte_pos >= io->next_period_byte) {
		struct snd_pcm_substream *substream = io->substream;
		struct snd_pcm_runtime *runtime = substream->runtime;

		io->period_pos++;
		io->next_period_byte += io->byte_per_period;

		if (io->period_pos >= runtime->periods) {
			io->byte_pos = 0;
			io->period_pos = 0;
			io->next_period_byte = io->byte_per_period;
		}

		snd_pcm_period_elapsed(substream);
	}
}

static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
				struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	if (!list_empty(&io->head))
		return -EIO;

	INIT_LIST_HEAD(&io->head);
	io->substream		= substream;
	io->byte_pos		= 0;
	io->period_pos		= 0;
	io->byte_per_period	= runtime->period_size *
				  runtime->channels *
				  samples_to_bytes(runtime, 1);
	io->next_period_byte	= io->byte_per_period;

	return 0;
}

static
struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	return  rtd->cpu_dai;
}

static
struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
					struct snd_pcm_substream *substream)
{
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		return &rdai->playback;
	else
		return &rdai->capture;
}

static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
			    struct snd_soc_dai *dai)
{
	struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
	struct rsnd_dai_platform_info *info = rsnd_dai_get_platform_info(rdai);
	int ssi_id = rsnd_dai_is_play(rdai, io) ?	info->ssi_id_playback :
							info->ssi_id_capture;
	int ret;
	unsigned long flags;

	rsnd_lock(priv, flags);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		ret = rsnd_dai_stream_init(io, substream);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_platform_call(priv, dai, start, ssi_id);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_gen_path_init(priv, rdai, io);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_dai_call(rdai, io, init);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_dai_call(rdai, io, start);
		if (ret < 0)
			goto dai_trigger_end;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		ret = rsnd_dai_call(rdai, io, stop);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_dai_call(rdai, io, quit);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_gen_path_exit(priv, rdai, io);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_platform_call(priv, dai, stop, ssi_id);
		if (ret < 0)
			goto dai_trigger_end;
		break;
	default:
		ret = -EINVAL;
	}

dai_trigger_end:
	rsnd_unlock(priv, flags);

	return ret;
}

static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		rdai->clk_master = 1;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		rdai->clk_master = 0;
		break;
	default:
		return -EINVAL;
	}

	/* set clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_IF:
		rdai->bit_clk_inv = 0;
		rdai->frm_clk_inv = 1;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		rdai->bit_clk_inv = 1;
		rdai->frm_clk_inv = 0;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		rdai->bit_clk_inv = 1;
		rdai->frm_clk_inv = 1;
		break;
	case SND_SOC_DAIFMT_NB_NF:
	default:
		rdai->bit_clk_inv = 0;
		rdai->frm_clk_inv = 0;
		break;
	}

	/* set format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		rdai->sys_delay = 0;
		rdai->data_alignment = 0;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		rdai->sys_delay = 1;
		rdai->data_alignment = 0;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		rdai->sys_delay = 1;
		rdai->data_alignment = 1;
		break;
	}

	return 0;
}

static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
	.trigger	= rsnd_soc_dai_trigger,
	.set_fmt	= rsnd_soc_dai_set_fmt,
};

static int rsnd_dai_probe(struct platform_device *pdev,
			  struct rcar_snd_info *info,
			  struct rsnd_priv *priv)
{
	struct snd_soc_dai_driver *drv;
	struct rsnd_dai *rdai;
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_dai_platform_info *dai_info;
	int dai_nr = info->dai_info_nr;
	int i, pid, cid;

	drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
	rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
	if (!drv || !rdai) {
		dev_err(dev, "dai allocate failed\n");
		return -ENOMEM;
	}

	for (i = 0; i < dai_nr; i++) {
		dai_info = &info->dai_info[i];

		pid = dai_info->ssi_id_playback;
		cid = dai_info->ssi_id_capture;

		/*
		 *	init rsnd_dai
		 */
		INIT_LIST_HEAD(&rdai[i].playback.head);
		INIT_LIST_HEAD(&rdai[i].capture.head);

		rdai[i].info = dai_info;

		snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);

		/*
		 *	init snd_soc_dai_driver
		 */
		drv[i].name	= rdai[i].name;
		drv[i].ops	= &rsnd_soc_dai_ops;
		if (pid >= 0) {
			drv[i].playback.rates		= RSND_RATES;
			drv[i].playback.formats		= RSND_FMTS;
			drv[i].playback.channels_min	= 2;
			drv[i].playback.channels_max	= 2;
		}
		if (cid >= 0) {
			drv[i].capture.rates		= RSND_RATES;
			drv[i].capture.formats		= RSND_FMTS;
			drv[i].capture.channels_min	= 2;
			drv[i].capture.channels_max	= 2;
		}

		dev_dbg(dev, "%s (%d, %d) probed", rdai[i].name, pid, cid);
	}

	priv->dai_nr	= dai_nr;
	priv->daidrv	= drv;
	priv->rdai	= rdai;

	return 0;
}

static void rsnd_dai_remove(struct platform_device *pdev,
			  struct rsnd_priv *priv)
{
}

/*
 *		pcm ops
 */
static struct snd_pcm_hardware rsnd_pcm_hardware = {
	.info =		SNDRV_PCM_INFO_INTERLEAVED	|
			SNDRV_PCM_INFO_MMAP		|
			SNDRV_PCM_INFO_MMAP_VALID	|
			SNDRV_PCM_INFO_PAUSE,
	.formats		= RSND_FMTS,
	.rates			= RSND_RATES,
	.rate_min		= 8000,
	.rate_max		= 192000,
	.channels_min		= 2,
	.channels_max		= 2,
	.buffer_bytes_max	= 64 * 1024,
	.period_bytes_min	= 32,
	.period_bytes_max	= 8192,
	.periods_min		= 1,
	.periods_max		= 32,
	.fifo_size		= 256,
};

static int rsnd_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret = 0;

	snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);

	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);

	return ret;
}

static int rsnd_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);

	return bytes_to_frames(runtime, io->byte_pos);
}

static struct snd_pcm_ops rsnd_pcm_ops = {
	.open		= rsnd_pcm_open,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= rsnd_hw_params,
	.hw_free	= snd_pcm_lib_free_pages,
	.pointer	= rsnd_pointer,
};

/*
 *		snd_soc_platform
 */

#define PREALLOC_BUFFER		(32 * 1024)
#define PREALLOC_BUFFER_MAX	(32 * 1024)

static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	return snd_pcm_lib_preallocate_pages_for_all(
		rtd->pcm,
		SNDRV_DMA_TYPE_DEV,
		rtd->card->snd_card->dev,
		PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
}

static void rsnd_pcm_free(struct snd_pcm *pcm)
{
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static struct snd_soc_platform_driver rsnd_soc_platform = {
	.ops		= &rsnd_pcm_ops,
	.pcm_new	= rsnd_pcm_new,
	.pcm_free	= rsnd_pcm_free,
};

static const struct snd_soc_component_driver rsnd_soc_component = {
	.name		= "rsnd",
};

/*
 *	rsnd probe
 */
static int rsnd_probe(struct platform_device *pdev)
{
	struct rcar_snd_info *info;
	struct rsnd_priv *priv;
	struct device *dev = &pdev->dev;
	int ret;

	info = pdev->dev.platform_data;
	if (!info) {
		dev_err(dev, "driver needs R-Car sound information\n");
		return -ENODEV;
	}

	/*
	 *	init priv data
	 */
	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(dev, "priv allocate failed\n");
		return -ENODEV;
	}

	priv->dev	= dev;
	priv->info	= info;
	spin_lock_init(&priv->lock);

	/*
	 *	init each module
	 */
	ret = rsnd_gen_probe(pdev, info, priv);
	if (ret < 0)
		return ret;

	ret = rsnd_dai_probe(pdev, info, priv);
	if (ret < 0)
		return ret;

	ret = rsnd_scu_probe(pdev, info, priv);
	if (ret < 0)
		return ret;

	/*
	 *	asoc register
	 */
	ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
	if (ret < 0) {
		dev_err(dev, "cannot snd soc register\n");
		return ret;
	}

	ret = snd_soc_register_component(dev, &rsnd_soc_component,
					 priv->daidrv, rsnd_dai_nr(priv));
	if (ret < 0) {
		dev_err(dev, "cannot snd dai register\n");
		goto exit_snd_soc;
	}

	dev_set_drvdata(dev, priv);

	pm_runtime_enable(dev);

	dev_info(dev, "probed\n");
	return ret;

exit_snd_soc:
	snd_soc_unregister_platform(dev);

	return ret;
}

static int rsnd_remove(struct platform_device *pdev)
{
	struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);

	pm_runtime_disable(&pdev->dev);

	/*
	 *	remove each module
	 */
	rsnd_scu_remove(pdev, priv);
	rsnd_dai_remove(pdev, priv);
	rsnd_gen_remove(pdev, priv);

	return 0;
}

static struct platform_driver rsnd_driver = {
	.driver	= {
		.name	= "rcar_sound",
	},
	.probe		= rsnd_probe,
	.remove		= rsnd_remove,
};
module_platform_driver(rsnd_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Renesas R-Car audio driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_ALIAS("platform:rcar-pcm-audio");
Commit	Line	Data
1536a968 KM	1	/*
	2	* Renesas R-Car SRU/SCU/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
	15	/*
	16	* Renesas R-Car sound device structure
	17	*
	18	* Gen1
	19	*
	20	* SRU : Sound Routing Unit
	21	* - SRC : Sampling Rate Converter
	22	* - CMD
	23	* - CTU : Channel Count Conversion Unit
	24	* - MIX : Mixer
	25	* - DVC : Digital Volume and Mute Function
	26	* - SSI : Serial Sound Interface
	27	*
	28	* Gen2
	29	*
	30	* SCU : Sampling Rate Converter Unit
	31	* - SRC : Sampling Rate Converter
	32	* - CMD
	33	* - CTU : Channel Count Conversion Unit
	34	* - MIX : Mixer
	35	* - DVC : Digital Volume and Mute Function
	36	* SSIU : Serial Sound Interface Unit
	37	* - SSI : Serial Sound Interface
	38	*/
	39
	40	/*
	41	* driver data Image
	42	*
	43	* rsnd_priv
	44	* \|
	45	* \| ** this depends on Gen1/Gen2
	46	* \|
	47	* +- gen
	48	* \|
	49	* \| ** these depend on data path
	50	* \| ** gen and platform data control it
	51	* \|
	52	* +- rdai[0]
	53	* \| \| sru ssiu ssi
	54	* \| +- playback -> [mod] -> [mod] -> [mod] -> ...
	55	* \| \|
	56	* \| \| sru ssiu ssi
	57	* \| +- capture -> [mod] -> [mod] -> [mod] -> ...
	58	* \|
	59	* +- rdai[1]
	60	* \| \| sru ssiu ssi
	61	* \| +- playback -> [mod] -> [mod] -> [mod] -> ...
	62	* \| \|
	63	* \| \| sru ssiu ssi
	64	* \| +- capture -> [mod] -> [mod] -> [mod] -> ...
65	* ...
66	* \|
67	* \| ** these control ssi
68	* \|
69	* +- ssi
70	* \| \|
71	* \| +- ssi[0]
72	* \| +- ssi[1]
73	* \| +- ssi[2]
74	* \| ...
75	* \|
76	* \| ** these control scu
77	* \|
78	* +- scu
79	* \|
80	* +- scu[0]
81	* +- scu[1]
82	* +- scu[2]
83	* ...
84	*
85	*
86	* for_each_rsnd_dai(xx, priv, xx)
87	* rdai[0] => rdai[1] => rdai[2] => ...
88	*
89	* for_each_rsnd_mod(xx, rdai, xx)
90	* [mod] => [mod] => [mod] => ...
91	*
92	* rsnd_dai_call(xxx, fn )
93	* [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
94	*
95	*/
96	#include <linux/pm_runtime.h>
97	#include "rsnd.h"
98
99	#define RSND_RATES SNDRV_PCM_RATE_8000_96000
100	#define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S16_LE)
101
102	/*
103	* rsnd_platform functions
104	*/
105	#define rsnd_platform_call(priv, dai, func, param...) \
106	(!(priv->info->func) ? -ENODEV : \
107	priv->info->func(param))
108
109
3337744a KM	110	/*
	111	* basic function
	112	*/
	113	u32 rsnd_read(struct rsnd_priv *priv,
	114	struct rsnd_mod *mod, enum rsnd_reg reg)
	115	{
	116	void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
	117
	118	BUG_ON(!base);
	119
	120	return ioread32(base);
	121	}
	122
	123	void rsnd_write(struct rsnd_priv *priv,
	124	struct rsnd_mod *mod,
	125	enum rsnd_reg reg, u32 data)
	126	{
	127	void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
	128	struct device *dev = rsnd_priv_to_dev(priv);
	129
	130	BUG_ON(!base);
	131
	132	dev_dbg(dev, "w %p : %08x\n", base, data);
	133
	134	iowrite32(data, base);
	135	}
	136
	137	void rsnd_bset(struct rsnd_priv priv, struct rsnd_mod mod,
	138	enum rsnd_reg reg, u32 mask, u32 data)
	139	{
	140	void __iomem *base = rsnd_gen_reg_get(priv, mod, reg);
	141	struct device *dev = rsnd_priv_to_dev(priv);
	142	u32 val;
	143
	144	BUG_ON(!base);
	145
	146	val = ioread32(base);
	147	val &= ~mask;
	148	val \|= data & mask;
	149	iowrite32(val, base);
	150
	151	dev_dbg(dev, "s %p : %08x\n", base, val);
	152	}
	153
cdaa3cdf KM	154	/*
	155	* rsnd_mod functions
	156	*/
	157	char rsnd_mod_name(struct rsnd_mod mod)
	158	{
	159	if (!mod \|\| !mod->ops)
	160	return "unknown";
	161
	162	return mod->ops->name;
	163	}
	164
	165	void rsnd_mod_init(struct rsnd_priv *priv,
	166	struct rsnd_mod *mod,
	167	struct rsnd_mod_ops *ops,
	168	int id)
	169	{
	170	mod->priv = priv;
	171	mod->id = id;
	172	mod->ops = ops;
	173	INIT_LIST_HEAD(&mod->list);
	174	}
	175
1536a968 KM	176	/*
	177	* rsnd_dai functions
	178	*/
cdaa3cdf KM	179	#define rsnd_dai_call(rdai, io, fn) \
	180	({ \
	181	struct rsnd_mod mod, n; \
	182	int ret = 0; \
	183	for_each_rsnd_mod(mod, n, io) { \
	184	ret = rsnd_mod_call(mod, fn, rdai, io); \
	185	if (ret < 0) \
	186	break; \
	187	} \
	188	ret; \
	189	})
	190
	191	int rsnd_dai_connect(struct rsnd_dai *rdai,
	192	struct rsnd_mod *mod,
	193	struct rsnd_dai_stream *io)
	194	{
	195	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	196	struct device *dev = rsnd_priv_to_dev(priv);
	197
	198	if (!mod) {
	199	dev_err(dev, "NULL mod\n");
	200	return -EIO;
	201	}
	202
	203	if (!list_empty(&mod->list)) {
	204	dev_err(dev, "%s%d is not empty\n",
	205	rsnd_mod_name(mod),
	206	rsnd_mod_id(mod));
	207	return -EIO;
	208	}
	209
	210	list_add_tail(&mod->list, &io->head);
	211
	212	return 0;
	213	}
	214
	215	int rsnd_dai_disconnect(struct rsnd_mod *mod)
	216	{
	217	list_del_init(&mod->list);
	218
	219	return 0;
	220	}
	221
1536a968 KM	222	struct rsnd_dai rsnd_dai_get(struct rsnd_priv priv, int id)
	223	{
	224	return priv->rdai + id;
	225	}
	226
	227	static struct rsnd_dai rsnd_dai_to_rdai(struct snd_soc_dai dai)
	228	{
	229	struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
	230
	231	return rsnd_dai_get(priv, dai->id);
	232	}
	233
	234	int rsnd_dai_is_play(struct rsnd_dai rdai, struct rsnd_dai_stream io)
	235	{
	236	return &rdai->playback == io;
	237	}
	238
	239	/*
	240	* rsnd_soc_dai functions
	241	*/
	242	int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
	243	{
	244	struct snd_pcm_substream *substream = io->substream;
	245	struct snd_pcm_runtime *runtime = substream->runtime;
	246	int pos = io->byte_pos + additional;
	247
	248	pos %= (runtime->periods * io->byte_per_period);
	249
	250	return pos;
	251	}
	252
	253	void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
	254	{
	255	io->byte_pos += byte;
	256
	257	if (io->byte_pos >= io->next_period_byte) {
	258	struct snd_pcm_substream *substream = io->substream;
	259	struct snd_pcm_runtime *runtime = substream->runtime;
	260
	261	io->period_pos++;
	262	io->next_period_byte += io->byte_per_period;
	263
	264	if (io->period_pos >= runtime->periods) {
	265	io->byte_pos = 0;
	266	io->period_pos = 0;
	267	io->next_period_byte = io->byte_per_period;
	268	}
	269
	270	snd_pcm_period_elapsed(substream);
	271	}
	272	}
	273
	274	static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
	275	struct snd_pcm_substream *substream)
	276	{
	277	struct snd_pcm_runtime *runtime = substream->runtime;
	278
	279	if (!list_empty(&io->head))
	280	return -EIO;
	281
	282	INIT_LIST_HEAD(&io->head);
	283	io->substream = substream;
	284	io->byte_pos = 0;
	285	io->period_pos = 0;
286	io->byte_per_period = runtime->period_size *
287	runtime->channels *
288	samples_to_bytes(runtime, 1);
289	io->next_period_byte = io->byte_per_period;
290
291	return 0;
292	}
293
294	static
295	struct snd_soc_dai rsnd_substream_to_dai(struct snd_pcm_substream substream)
296	{
297	struct snd_soc_pcm_runtime *rtd = substream->private_data;
298
299	return rtd->cpu_dai;
300	}
301
302	static
303	struct rsnd_dai_stream rsnd_rdai_to_io(struct rsnd_dai rdai,
304	struct snd_pcm_substream *substream)
305	{
306	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
307	return &rdai->playback;
308	else
309	return &rdai->capture;
310	}
311
312	static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
313	struct snd_soc_dai *dai)
314	{
315	struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
316	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
317	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
318	struct rsnd_dai_platform_info *info = rsnd_dai_get_platform_info(rdai);
319	int ssi_id = rsnd_dai_is_play(rdai, io) ? info->ssi_id_playback :
320	info->ssi_id_capture;
321	int ret;
322	unsigned long flags;
323
324	rsnd_lock(priv, flags);
325
326	switch (cmd) {
327	case SNDRV_PCM_TRIGGER_START:
328	ret = rsnd_dai_stream_init(io, substream);
329	if (ret < 0)
330	goto dai_trigger_end;
331
332	ret = rsnd_platform_call(priv, dai, start, ssi_id);
333	if (ret < 0)
334	goto dai_trigger_end;
335
3337744a KM	336	ret = rsnd_gen_path_init(priv, rdai, io);
	337	if (ret < 0)
	338	goto dai_trigger_end;
	339
cdaa3cdf KM	340	ret = rsnd_dai_call(rdai, io, init);
	341	if (ret < 0)
	342	goto dai_trigger_end;
	343
	344	ret = rsnd_dai_call(rdai, io, start);
	345	if (ret < 0)
	346	goto dai_trigger_end;
1536a968 KM	347	break;
1536a968 KM	348	case SNDRV_PCM_TRIGGER_STOP:
cdaa3cdf KM	349	ret = rsnd_dai_call(rdai, io, stop);
	350	if (ret < 0)
	351	goto dai_trigger_end;
	352
	353	ret = rsnd_dai_call(rdai, io, quit);
	354	if (ret < 0)
	355	goto dai_trigger_end;
	356
3337744a	357	ret = rsnd_gen_path_exit(priv, rdai, io);
1536a968 KM	358	if (ret < 0)
	359	goto dai_trigger_end;
	360
3337744a KM	361	ret = rsnd_platform_call(priv, dai, stop, ssi_id);
	362	if (ret < 0)
	363	goto dai_trigger_end;
1536a968 KM	364	break;
	365	default:
	366	ret = -EINVAL;
	367	}
	368
	369	dai_trigger_end:
	370	rsnd_unlock(priv, flags);
	371
	372	return ret;
	373	}
	374
	375	static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	376	{
	377	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	378
	379	/* set master/slave audio interface */
	380	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	381	case SND_SOC_DAIFMT_CBM_CFM:
	382	rdai->clk_master = 1;
	383	break;
	384	case SND_SOC_DAIFMT_CBS_CFS:
	385	rdai->clk_master = 0;
	386	break;
	387	default:
	388	return -EINVAL;
	389	}
	390
	391	/* set clock inversion */
	392	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	393	case SND_SOC_DAIFMT_NB_IF:
	394	rdai->bit_clk_inv = 0;
	395	rdai->frm_clk_inv = 1;
	396	break;
	397	case SND_SOC_DAIFMT_IB_NF:
	398	rdai->bit_clk_inv = 1;
	399	rdai->frm_clk_inv = 0;
	400	break;
	401	case SND_SOC_DAIFMT_IB_IF:
	402	rdai->bit_clk_inv = 1;
	403	rdai->frm_clk_inv = 1;
	404	break;
	405	case SND_SOC_DAIFMT_NB_NF:
	406	default:
	407	rdai->bit_clk_inv = 0;
	408	rdai->frm_clk_inv = 0;
	409	break;
	410	}
	411
	412	/* set format */
	413	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	414	case SND_SOC_DAIFMT_I2S:
	415	rdai->sys_delay = 0;
	416	rdai->data_alignment = 0;
	417	break;
	418	case SND_SOC_DAIFMT_LEFT_J:
	419	rdai->sys_delay = 1;
	420	rdai->data_alignment = 0;
	421	break;
	422	case SND_SOC_DAIFMT_RIGHT_J:
	423	rdai->sys_delay = 1;
	424	rdai->data_alignment = 1;
	425	break;
	426	}
	427
428	return 0;
429	}
430
431	static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
432	.trigger = rsnd_soc_dai_trigger,
433	.set_fmt = rsnd_soc_dai_set_fmt,
434	};
435
436	static int rsnd_dai_probe(struct platform_device *pdev,
437	struct rcar_snd_info *info,
438	struct rsnd_priv *priv)
439	{
440	struct snd_soc_dai_driver *drv;
441	struct rsnd_dai *rdai;
442	struct device *dev = rsnd_priv_to_dev(priv);
443	struct rsnd_dai_platform_info *dai_info;
444	int dai_nr = info->dai_info_nr;
445	int i, pid, cid;
446
447	drv = devm_kzalloc(dev, sizeof(drv) dai_nr, GFP_KERNEL);
448	rdai = devm_kzalloc(dev, sizeof(rdai) dai_nr, GFP_KERNEL);
449	if (!drv \|\| !rdai) {
450	dev_err(dev, "dai allocate failed\n");
451	return -ENOMEM;
452	}
453
454	for (i = 0; i < dai_nr; i++) {
455	dai_info = &info->dai_info[i];
456
457	pid = dai_info->ssi_id_playback;
458	cid = dai_info->ssi_id_capture;
459
460	/*
461	* init rsnd_dai
462	*/
463	INIT_LIST_HEAD(&rdai[i].playback.head);
464	INIT_LIST_HEAD(&rdai[i].capture.head);
465
466	rdai[i].info = dai_info;
467
468	snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
469
470	/*
471	* init snd_soc_dai_driver
472	*/
473	drv[i].name = rdai[i].name;
474	drv[i].ops = &rsnd_soc_dai_ops;
475	if (pid >= 0) {
476	drv[i].playback.rates = RSND_RATES;
477	drv[i].playback.formats = RSND_FMTS;
478	drv[i].playback.channels_min = 2;
479	drv[i].playback.channels_max = 2;
480	}
481	if (cid >= 0) {
482	drv[i].capture.rates = RSND_RATES;
483	drv[i].capture.formats = RSND_FMTS;
484	drv[i].capture.channels_min = 2;
485	drv[i].capture.channels_max = 2;
486	}
487
488	dev_dbg(dev, "%s (%d, %d) probed", rdai[i].name, pid, cid);
489	}
490
491	priv->dai_nr = dai_nr;
492	priv->daidrv = drv;
493	priv->rdai = rdai;
494
495	return 0;
496	}
497
498	static void rsnd_dai_remove(struct platform_device *pdev,
499	struct rsnd_priv *priv)
500	{
501	}
502
503	/*
504	* pcm ops
505	*/
506	static struct snd_pcm_hardware rsnd_pcm_hardware = {
507	.info = SNDRV_PCM_INFO_INTERLEAVED \|
508	SNDRV_PCM_INFO_MMAP \|
509	SNDRV_PCM_INFO_MMAP_VALID \|
510	SNDRV_PCM_INFO_PAUSE,
511	.formats = RSND_FMTS,
512	.rates = RSND_RATES,
513	.rate_min = 8000,
514	.rate_max = 192000,
515	.channels_min = 2,
516	.channels_max = 2,
517	.buffer_bytes_max = 64 * 1024,
518	.period_bytes_min = 32,
519	.period_bytes_max = 8192,
520	.periods_min = 1,
521	.periods_max = 32,
522	.fifo_size = 256,
523	};
524
525	static int rsnd_pcm_open(struct snd_pcm_substream *substream)
526	{
527	struct snd_pcm_runtime *runtime = substream->runtime;
528	int ret = 0;
529
530	snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
531
532	ret = snd_pcm_hw_constraint_integer(runtime,
533	SNDRV_PCM_HW_PARAM_PERIODS);
534
535	return ret;
536	}
537
538	static int rsnd_hw_params(struct snd_pcm_substream *substream,
539	struct snd_pcm_hw_params *hw_params)
540	{
541	return snd_pcm_lib_malloc_pages(substream,
542	params_buffer_bytes(hw_params));
543	}
544
545	static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
546	{
547	struct snd_pcm_runtime *runtime = substream->runtime;
548	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
549	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
550	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
551
552	return bytes_to_frames(runtime, io->byte_pos);
553	}
554
555	static struct snd_pcm_ops rsnd_pcm_ops = {
556	.open = rsnd_pcm_open,
557	.ioctl = snd_pcm_lib_ioctl,
558	.hw_params = rsnd_hw_params,
559	.hw_free = snd_pcm_lib_free_pages,
560	.pointer = rsnd_pointer,
561	};
562
563	/*
564	* snd_soc_platform
565	*/
566
567	#define PREALLOC_BUFFER (32 * 1024)
568	#define PREALLOC_BUFFER_MAX (32 * 1024)
569
570	static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
571	{
572	return snd_pcm_lib_preallocate_pages_for_all(
573	rtd->pcm,
574	SNDRV_DMA_TYPE_DEV,
575	rtd->card->snd_card->dev,
576	PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
577	}
578
579	static void rsnd_pcm_free(struct snd_pcm *pcm)
580	{
581	snd_pcm_lib_preallocate_free_for_all(pcm);
582	}
583
584	static struct snd_soc_platform_driver rsnd_soc_platform = {
585	.ops = &rsnd_pcm_ops,
586	.pcm_new = rsnd_pcm_new,
587	.pcm_free = rsnd_pcm_free,
588	};
589
590	static const struct snd_soc_component_driver rsnd_soc_component = {
591	.name = "rsnd",
592	};
593
594	/*
595	* rsnd probe
596	*/
597	static int rsnd_probe(struct platform_device *pdev)
598	{
599	struct rcar_snd_info *info;
600	struct rsnd_priv *priv;
601	struct device *dev = &pdev->dev;
602	int ret;
603
604	info = pdev->dev.platform_data;
605	if (!info) {
606	dev_err(dev, "driver needs R-Car sound information\n");
607	return -ENODEV;
608	}
609
610	/*
611	* init priv data
612	*/
613	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
614	if (!priv) {
615	dev_err(dev, "priv allocate failed\n");
616	return -ENODEV;
617	}
618
619	priv->dev = dev;
620	priv->info = info;
621	spin_lock_init(&priv->lock);
622
623	/*
624	* init each module
625	*/
3337744a KM	626	ret = rsnd_gen_probe(pdev, info, priv);
	627	if (ret < 0)
	628	return ret;
	629
1536a968 KM	630	ret = rsnd_dai_probe(pdev, info, priv);
	631	if (ret < 0)
	632	return ret;
	633
07539c1d KM	634	ret = rsnd_scu_probe(pdev, info, priv);
	635	if (ret < 0)
	636	return ret;
	637
1536a968 KM	638	/*
	639	* asoc register
	640	*/
	641	ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
	642	if (ret < 0) {
	643	dev_err(dev, "cannot snd soc register\n");
	644	return ret;
	645	}
	646
	647	ret = snd_soc_register_component(dev, &rsnd_soc_component,
	648	priv->daidrv, rsnd_dai_nr(priv));
	649	if (ret < 0) {
	650	dev_err(dev, "cannot snd dai register\n");
	651	goto exit_snd_soc;
	652	}
	653
	654	dev_set_drvdata(dev, priv);
	655
	656	pm_runtime_enable(dev);
	657
	658	dev_info(dev, "probed\n");
	659	return ret;
	660
	661	exit_snd_soc:
	662	snd_soc_unregister_platform(dev);
	663
	664	return ret;
	665	}
	666
	667	static int rsnd_remove(struct platform_device *pdev)
	668	{
	669	struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
	670
	671	pm_runtime_disable(&pdev->dev);
	672
	673	/*
	674	* remove each module
	675	*/
07539c1d	676	rsnd_scu_remove(pdev, priv);
1536a968	677	rsnd_dai_remove(pdev, priv);
3337744a	678	rsnd_gen_remove(pdev, priv);
1536a968 KM	679
	680	return 0;
	681	}
	682
	683	static struct platform_driver rsnd_driver = {
	684	.driver = {
	685	.name = "rcar_sound",
	686	},
	687	.probe = rsnd_probe,
	688	.remove = rsnd_remove,
	689	};
	690	module_platform_driver(rsnd_driver);
	691
	692	MODULE_LICENSE("GPL");
	693	MODULE_DESCRIPTION("Renesas R-Car audio driver");
	694	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
	695	MODULE_ALIAS("platform:rcar-pcm-audio");