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linux-IllusionX/sound/soc/sh/rcar/rsnd.h
Kuninori Morimoto 374a528111 ASoC: rsnd: SSI supports DMA transfer via BUSIF 
This patch adds BUSIF support for R-Car sound DMAEngine transfer.
The sound data will be transferred via FIFO which can cover blank time
which will happen when DMA channel is switching.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-08-06 17:56:13 +01:00

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/*
* Renesas R-Car
*
* Copyright (C) 2013 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@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.
*/
#ifndef RSND_H
#define RSND_H
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/sh_dma.h>
#include <linux/workqueue.h>
#include <sound/rcar_snd.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
/*
* pseudo register
*
* The register address offsets SRU/SCU/SSIU on Gen1/Gen2 are very different.
* This driver uses pseudo register in order to hide it.
* see gen1/gen2 for detail
*/
enum rsnd_reg {
/* SRU/SCU */
RSND_REG_SRC_ROUTE_SEL,
RSND_REG_SRC_TMG_SEL0,
RSND_REG_SRC_TMG_SEL1,
RSND_REG_SRC_TMG_SEL2,
RSND_REG_SRC_CTRL,
RSND_REG_SSI_MODE0,
RSND_REG_SSI_MODE1,
RSND_REG_BUSIF_MODE,
RSND_REG_BUSIF_ADINR,
/* ADG */
RSND_REG_BRRA,
RSND_REG_BRRB,
RSND_REG_SSICKR,
RSND_REG_AUDIO_CLK_SEL0,
RSND_REG_AUDIO_CLK_SEL1,
RSND_REG_AUDIO_CLK_SEL2,
RSND_REG_AUDIO_CLK_SEL3,
RSND_REG_AUDIO_CLK_SEL4,
RSND_REG_AUDIO_CLK_SEL5,
/* SSI */
RSND_REG_SSICR,
RSND_REG_SSISR,
RSND_REG_SSITDR,
RSND_REG_SSIRDR,
RSND_REG_SSIWSR,
RSND_REG_MAX,
};
struct rsnd_priv;
struct rsnd_mod;
struct rsnd_dai;
struct rsnd_dai_stream;
/*
* R-Car basic functions
*/
#define rsnd_mod_read(m, r) \
rsnd_read(rsnd_mod_to_priv(m), m, RSND_REG_##r)
#define rsnd_mod_write(m, r, d) \
rsnd_write(rsnd_mod_to_priv(m), m, RSND_REG_##r, d)
#define rsnd_mod_bset(m, r, s, d) \
rsnd_bset(rsnd_mod_to_priv(m), m, RSND_REG_##r, s, d)
#define rsnd_priv_read(p, r) rsnd_read(p, NULL, RSND_REG_##r)
#define rsnd_priv_write(p, r, d) rsnd_write(p, NULL, RSND_REG_##r, d)
#define rsnd_priv_bset(p, r, s, d) rsnd_bset(p, NULL, RSND_REG_##r, s, d)
u32 rsnd_read(struct rsnd_priv *priv, struct rsnd_mod *mod, enum rsnd_reg reg);
void rsnd_write(struct rsnd_priv *priv, struct rsnd_mod *mod,
enum rsnd_reg reg, u32 data);
void rsnd_bset(struct rsnd_priv *priv, struct rsnd_mod *mod, enum rsnd_reg reg,
u32 mask, u32 data);
/*
* R-Car DMA
*/
struct rsnd_dma {
struct rsnd_priv *priv;
struct sh_dmae_slave slave;
struct work_struct work;
struct dma_chan *chan;
enum dma_data_direction dir;
int (*inquiry)(struct rsnd_dma *dma, dma_addr_t *buf, int *len);
int (*complete)(struct rsnd_dma *dma);
int submit_loop;
};
void rsnd_dma_start(struct rsnd_dma *dma);
void rsnd_dma_stop(struct rsnd_dma *dma);
int rsnd_dma_available(struct rsnd_dma *dma);
int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
int is_play, int id,
int (*inquiry)(struct rsnd_dma *dma, dma_addr_t *buf, int *len),
int (*complete)(struct rsnd_dma *dma));
void rsnd_dma_quit(struct rsnd_priv *priv,
struct rsnd_dma *dma);
/*
* R-Car sound mod
*/
struct rsnd_mod_ops {
char *name;
int (*init)(struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io);
int (*quit)(struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io);
int (*start)(struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io);
int (*stop)(struct rsnd_mod *mod,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io);
};
struct rsnd_mod {
int id;
struct rsnd_priv *priv;
struct rsnd_mod_ops *ops;
struct list_head list; /* connect to rsnd_dai playback/capture */
struct rsnd_dma dma;
};
#define rsnd_mod_to_priv(mod) ((mod)->priv)
#define rsnd_mod_to_dma(mod) (&(mod)->dma)
#define rsnd_dma_to_mod(_dma) container_of((_dma), struct rsnd_mod, dma)
#define rsnd_mod_id(mod) ((mod)->id)
#define for_each_rsnd_mod(pos, n, io) \
list_for_each_entry_safe(pos, n, &(io)->head, list)
#define rsnd_mod_call(mod, func, rdai, io) \
(!(mod) ? -ENODEV : \
!((mod)->ops->func) ? 0 : \
(mod)->ops->func(mod, rdai, io))
void rsnd_mod_init(struct rsnd_priv *priv,
struct rsnd_mod *mod,
struct rsnd_mod_ops *ops,
int id);
char *rsnd_mod_name(struct rsnd_mod *mod);
/*
* R-Car sound DAI
*/
#define RSND_DAI_NAME_SIZE 16
struct rsnd_dai_stream {
struct list_head head; /* head of rsnd_mod list */
struct snd_pcm_substream *substream;
int byte_pos;
int period_pos;
int byte_per_period;
int next_period_byte;
};
struct rsnd_dai {
char name[RSND_DAI_NAME_SIZE];
struct rsnd_dai_platform_info *info; /* rcar_snd.h */
struct rsnd_dai_stream playback;
struct rsnd_dai_stream capture;
int clk_master:1;
int bit_clk_inv:1;
int frm_clk_inv:1;
int sys_delay:1;
int data_alignment:1;
};
#define rsnd_dai_nr(priv) ((priv)->dai_nr)
#define for_each_rsnd_dai(rdai, priv, i) \
for (i = 0, (rdai) = rsnd_dai_get(priv, i); \
i < rsnd_dai_nr(priv); \
i++, (rdai) = rsnd_dai_get(priv, i))
struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id);
int rsnd_dai_disconnect(struct rsnd_mod *mod);
int rsnd_dai_connect(struct rsnd_dai *rdai, struct rsnd_mod *mod,
struct rsnd_dai_stream *io);
int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io);
int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai);
#define rsnd_dai_get_platform_info(rdai) ((rdai)->info)
#define rsnd_io_to_runtime(io) ((io)->substream->runtime)
void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int cnt);
int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional);
/*
* R-Car Gen1/Gen2
*/
int rsnd_gen_probe(struct platform_device *pdev,
struct rcar_snd_info *info,
struct rsnd_priv *priv);
void rsnd_gen_remove(struct platform_device *pdev,
struct rsnd_priv *priv);
int rsnd_gen_path_init(struct rsnd_priv *priv,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io);
int rsnd_gen_path_exit(struct rsnd_priv *priv,
struct rsnd_dai *rdai,
struct rsnd_dai_stream *io);
void __iomem *rsnd_gen_reg_get(struct rsnd_priv *priv,
struct rsnd_mod *mod,
enum rsnd_reg reg);
#define rsnd_is_gen1(s) ((s)->info->flags & RSND_GEN1)
#define rsnd_is_gen2(s) ((s)->info->flags & RSND_GEN2)
/*
* R-Car ADG
*/
int rsnd_adg_ssi_clk_stop(struct rsnd_mod *mod);
int rsnd_adg_ssi_clk_try_start(struct rsnd_mod *mod, unsigned int rate);
int rsnd_adg_probe(struct platform_device *pdev,
struct rcar_snd_info *info,
struct rsnd_priv *priv);
void rsnd_adg_remove(struct platform_device *pdev,
struct rsnd_priv *priv);
/*
* R-Car sound priv
*/
struct rsnd_priv {
struct device *dev;
struct rcar_snd_info *info;
spinlock_t lock;
/*
* below value will be filled on rsnd_gen_probe()
*/
void *gen;
/*
* below value will be filled on rsnd_scu_probe()
*/
void *scu;
int scu_nr;
/*
* below value will be filled on rsnd_adg_probe()
*/
void *adg;
/*
* below value will be filled on rsnd_ssi_probe()
*/
void *ssiu;
/*
* below value will be filled on rsnd_dai_probe()
*/
struct snd_soc_dai_driver *daidrv;
struct rsnd_dai *rdai;
int dai_nr;
};
#define rsnd_priv_to_dev(priv) ((priv)->dev)
#define rsnd_lock(priv, flags) spin_lock_irqsave(&priv->lock, flags)
#define rsnd_unlock(priv, flags) spin_unlock_irqrestore(&priv->lock, flags)
/*
* R-Car SCU
*/
int rsnd_scu_probe(struct platform_device *pdev,
struct rcar_snd_info *info,
struct rsnd_priv *priv);
void rsnd_scu_remove(struct platform_device *pdev,
struct rsnd_priv *priv);
struct rsnd_mod *rsnd_scu_mod_get(struct rsnd_priv *priv, int id);
#define rsnd_scu_nr(priv) ((priv)->scu_nr)
/*
* R-Car SSI
*/
int rsnd_ssi_probe(struct platform_device *pdev,
struct rcar_snd_info *info,
struct rsnd_priv *priv);
void rsnd_ssi_remove(struct platform_device *pdev,
struct rsnd_priv *priv);
struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id);
struct rsnd_mod *rsnd_ssi_mod_get_frm_dai(struct rsnd_priv *priv,
int dai_id, int is_play);
#endif
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