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linux/include/sound/soc.h
Liam Girdwood a71a468a50 [ALSA] ASoC: Add support for BCLK based on (Rate * Chn * Word Size) 
This patch adds support for the DAI BCLK to be generated by multiplying
Rate * Channels * Word Size (RCW).
This now gives 3 options for BCLK clocking and synchronisation :-
 1. BCLK = Rate * x
 2. BCLK = MCLK / x
 3. BCLK = Rate * Chn * Word Size.  (New)
Changes:-
 o Add support for RCW generation of BCLK
 o Update Documentation to include RCW.
 o Update DAI documentation for label = value DAI modes.
 o Add RCW support to wm8731, wm8750 and pxa2xx-i2s drivers.

Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-02-09 09:01:07 +01:00

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/*
* linux/sound/soc.h -- ALSA SoC Layer
*
* Author: Liam Girdwood
* Created: Aug 11th 2005
* Copyright: Wolfson Microelectronics. PLC.
*
* 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 __LINUX_SND_SOC_H
#define __LINUX_SND_SOC_H
#include <linux/platform_device.h>
#include <linux/types.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/control.h>
#include <sound/ac97_codec.h>
#define SND_SOC_VERSION "0.12"
/*
* Convenience kcontrol builders
*/
#define SOC_SINGLE_VALUE(reg,shift,mask,invert) ((reg) | ((shift) << 8) |\
((shift) << 12) | ((mask) << 16) | ((invert) << 24))
#define SOC_SINGLE_VALUE_EXT(reg,mask,invert) ((reg) | ((mask) << 16) |\
((invert) << 31))
#define SOC_SINGLE(xname, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
.info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
.put = snd_soc_put_volsw, \
.private_value = SOC_SINGLE_VALUE(reg, shift, mask, invert) }
#define SOC_DOUBLE(xname, reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname),\
.info = snd_soc_info_volsw, .get = snd_soc_get_volsw, \
.put = snd_soc_put_volsw, \
.private_value = (reg) | ((shift_left) << 8) | \
((shift_right) << 12) | ((mask) << 16) | ((invert) << 24) }
#define SOC_DOUBLE_R(xname, reg_left, reg_right, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
.info = snd_soc_info_volsw_2r, \
.get = snd_soc_get_volsw_2r, .put = snd_soc_put_volsw_2r, \
.private_value = (reg_left) | ((shift) << 8) | \
((mask) << 12) | ((invert) << 20) | ((reg_right) << 24) }
#define SOC_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmask, xtexts) \
{ .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
.mask = xmask, .texts = xtexts }
#define SOC_ENUM_SINGLE(xreg, xshift, xmask, xtexts) \
SOC_ENUM_DOUBLE(xreg, xshift, xshift, xmask, xtexts)
#define SOC_ENUM_SINGLE_EXT(xmask, xtexts) \
{ .mask = xmask, .texts = xtexts }
#define SOC_ENUM(xname, xenum) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,\
.info = snd_soc_info_enum_double, \
.get = snd_soc_get_enum_double, .put = snd_soc_put_enum_double, \
.private_value = (unsigned long)&xenum }
#define SOC_SINGLE_EXT(xname, xreg, xmask, xinvert,\
xhandler_get, xhandler_put) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
.info = snd_soc_info_volsw_ext, \
.get = xhandler_get, .put = xhandler_put, \
.private_value = SOC_SINGLE_VALUE_EXT(xreg, xmask, xinvert) }
#define SOC_SINGLE_BOOL_EXT(xname, xdata, xhandler_get, xhandler_put) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
.info = snd_soc_info_bool_ext, \
.get = xhandler_get, .put = xhandler_put, \
.private_value = xdata }
#define SOC_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
.info = snd_soc_info_enum_ext, \
.get = xhandler_get, .put = xhandler_put, \
.private_value = (unsigned long)&xenum }
/*
* Digital Audio Interface (DAI) types
*/
#define SND_SOC_DAI_AC97 0x1
#define SND_SOC_DAI_I2S 0x2
#define SND_SOC_DAI_PCM 0x4
/*
* DAI hardware audio formats
*/
#define SND_SOC_DAIFMT_I2S (1 << 0) /* I2S mode */
#define SND_SOC_DAIFMT_RIGHT_J (1 << 1) /* Right justified mode */
#define SND_SOC_DAIFMT_LEFT_J (1 << 2) /* Left Justified mode */
#define SND_SOC_DAIFMT_DSP_A (1 << 3) /* L data msb after FRM or LRC */
#define SND_SOC_DAIFMT_DSP_B (1 << 4) /* L data msb during FRM or LRC */
#define SND_SOC_DAIFMT_AC97 (1 << 5) /* AC97 */
/*
* DAI hardware signal inversions
*/
#define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */
#define SND_SOC_DAIFMT_NB_IF (1 << 9) /* normal bclk + inv frm */
#define SND_SOC_DAIFMT_IB_NF (1 << 10) /* invert bclk + nor frm */
#define SND_SOC_DAIFMT_IB_IF (1 << 11) /* invert bclk + frm */
/*
* DAI hardware clock masters
* This is wrt the codec, the inverse is true for the interface
* i.e. if the codec is clk and frm master then the interface is
* clk and frame slave.
*/
#define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & frm master */
#define SND_SOC_DAIFMT_CBS_CFM (1 << 13) /* codec clk slave & frm master */
#define SND_SOC_DAIFMT_CBM_CFS (1 << 14) /* codec clk master & frame slave */
#define SND_SOC_DAIFMT_CBS_CFS (1 << 15) /* codec clk & frm slave */
#define SND_SOC_DAIFMT_FORMAT_MASK 0x00ff
#define SND_SOC_DAIFMT_INV_MASK 0x0f00
#define SND_SOC_DAIFMT_CLOCK_MASK 0xf000
/*
* DAI hardware audio direction
*/
#define SND_SOC_DAIDIR_PLAYBACK 0x1
#define SND_SOC_DAIDIR_CAPTURE 0x2
/*
* DAI hardware Time Division Multiplexing (TDM) Slots
* Left and Right data word positions
* This is measured in words (sample size) and not bits.
*/
#define SND_SOC_DAITDM_LRDW(l,r) ((l << 8) | r)
/*
* DAI hardware clock ratios
* bit clock can either be a generated by dividing mclk or
* by multiplying sample rate, hence there are 2 definitions below
* depending on codec type.
*/
/* ratio of sample rate to mclk/sysclk */
#define SND_SOC_FS_ALL 0xffff /* all mclk supported */
/* bit clock dividers */
#define SND_SOC_FSBD(x) (1 << (x - 1)) /* ratio mclk:bclk */
#define SND_SOC_FSBD_REAL(x) (ffs(x))
/* bit clock ratio to (sample rate * channels * word size) */
#define SND_SOC_FSBW(x) (1 << (x - 1))
#define SND_SOC_FSBW_REAL(x) (ffs(x))
/* all bclk ratios supported */
#define SND_SOC_FSB_ALL ~0ULL
/*
* DAI hardware flags
*/
/* use bfs mclk divider mode (BCLK = MCLK / x) */
#define SND_SOC_DAI_BFS_DIV 0x1
/* use bfs rate mulitplier (BCLK = RATE * x)*/
#define SND_SOC_DAI_BFS_RATE 0x2
/* use bfs rcw multiplier (BCLK = RATE * CHN * WORD SIZE) */
#define SND_SOC_DAI_BFS_RCW 0x4
/* capture and playback can use different clocks */
#define SND_SOC_DAI_ASYNC 0x8
/*
* AC97 codec ID's bitmask
*/
#define SND_SOC_DAI_AC97_ID0 (1 << 0)
#define SND_SOC_DAI_AC97_ID1 (1 << 1)
#define SND_SOC_DAI_AC97_ID2 (1 << 2)
#define SND_SOC_DAI_AC97_ID3 (1 << 3)
struct snd_soc_device;
struct snd_soc_pcm_stream;
struct snd_soc_ops;
struct snd_soc_dai_mode;
struct snd_soc_pcm_runtime;
struct snd_soc_codec_dai;
struct snd_soc_cpu_dai;
struct snd_soc_codec;
struct snd_soc_machine_config;
struct soc_enum;
struct snd_soc_ac97_ops;
struct snd_soc_clock_info;
typedef int (*hw_write_t)(void *,const char* ,int);
typedef int (*hw_read_t)(void *,char* ,int);
extern struct snd_ac97_bus_ops soc_ac97_ops;
/* pcm <-> DAI connect */
void snd_soc_free_pcms(struct snd_soc_device *socdev);
int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid);
int snd_soc_register_card(struct snd_soc_device *socdev);
/* set runtime hw params */
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
const struct snd_pcm_hardware *hw);
int snd_soc_get_rate(int rate);
/* codec IO */
#define snd_soc_read(codec, reg) codec->read(codec, reg)
#define snd_soc_write(codec, reg, value) codec->write(codec, reg, value)
/* codec register bit access */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
unsigned short mask, unsigned short value);
int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
unsigned short mask, unsigned short value);
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
struct snd_ac97_bus_ops *ops, int num);
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec);
/*
*Controls
*/
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
void *data, char *long_name);
int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_info_bool_ext(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
/* SoC PCM stream information */
struct snd_soc_pcm_stream {
char *stream_name;
unsigned int rate_min; /* min rate */
unsigned int rate_max; /* max rate */
unsigned int channels_min; /* min channels */
unsigned int channels_max; /* max channels */
unsigned int active:1; /* stream is in use */
};
/* SoC audio ops */
struct snd_soc_ops {
int (*startup)(struct snd_pcm_substream *);
void (*shutdown)(struct snd_pcm_substream *);
int (*hw_params)(struct snd_pcm_substream *, struct snd_pcm_hw_params *);
int (*hw_free)(struct snd_pcm_substream *);
int (*prepare)(struct snd_pcm_substream *);
int (*trigger)(struct snd_pcm_substream *, int);
};
/* SoC DAI hardware mode */
struct snd_soc_dai_mode {
u16 fmt; /* SND_SOC_DAIFMT_* */
u16 tdm; /* SND_SOC_HWTDM_* */
u64 pcmfmt; /* SNDRV_PCM_FMTBIT_* */
u16 pcmrate; /* SND_SOC_HWRATE_* */
u16 pcmdir:2; /* SND_SOC_HWDIR_* */
u16 flags:8; /* hw flags */
u16 fs; /* mclk to rate divider */
u64 bfs; /* mclk to bclk dividers */
unsigned long priv; /* private mode data */
};
/* DAI capabilities */
struct snd_soc_dai_cap {
int num_modes; /* number of DAI modes */
struct snd_soc_dai_mode *mode; /* array of supported DAI modes */
};
/* SoC Codec DAI */
struct snd_soc_codec_dai {
char *name;
int id;
/* DAI capabilities */
struct snd_soc_pcm_stream playback;
struct snd_soc_pcm_stream capture;
struct snd_soc_dai_cap caps;
/* DAI runtime info */
struct snd_soc_dai_mode dai_runtime;
struct snd_soc_ops ops;
unsigned int (*config_sysclk)(struct snd_soc_codec_dai*,
struct snd_soc_clock_info *info, unsigned int clk);
int (*digital_mute)(struct snd_soc_codec *,
struct snd_soc_codec_dai*, int);
unsigned int mclk; /* the audio master clock */
unsigned int pll_in; /* the PLL input clock */
unsigned int pll_out; /* the PLL output clock */
unsigned int clk_div; /* internal clock divider << 1 (for fractions) */
unsigned int active;
unsigned char pop_wait:1;
/* DAI private data */
void *private_data;
};
/* SoC CPU DAI */
struct snd_soc_cpu_dai {
/* DAI description */
char *name;
unsigned int id;
unsigned char type;
/* DAI callbacks */
int (*probe)(struct platform_device *pdev);
void (*remove)(struct platform_device *pdev);
int (*suspend)(struct platform_device *pdev,
struct snd_soc_cpu_dai *cpu_dai);
int (*resume)(struct platform_device *pdev,
struct snd_soc_cpu_dai *cpu_dai);
unsigned int (*config_sysclk)(struct snd_soc_cpu_dai *cpu_dai,
struct snd_soc_clock_info *info, unsigned int clk);
/* DAI capabilities */
struct snd_soc_pcm_stream capture;
struct snd_soc_pcm_stream playback;
struct snd_soc_dai_cap caps;
/* DAI runtime info */
struct snd_soc_dai_mode dai_runtime;
struct snd_soc_ops ops;
struct snd_pcm_runtime *runtime;
unsigned char active:1;
unsigned int mclk;
void *dma_data;
/* DAI private data */
void *private_data;
};
/* SoC Audio Codec */
struct snd_soc_codec {
char *name;
struct module *owner;
struct mutex mutex;
/* callbacks */
int (*dapm_event)(struct snd_soc_codec *codec, int event);
/* runtime */
struct snd_card *card;
struct snd_ac97 *ac97; /* for ad-hoc ac97 devices */
unsigned int active;
unsigned int pcm_devs;
void *private_data;
/* codec IO */
void *control_data; /* codec control (i2c/3wire) data */
unsigned int (*read)(struct snd_soc_codec *, unsigned int);
int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
hw_write_t hw_write;
hw_read_t hw_read;
void *reg_cache;
short reg_cache_size;
short reg_cache_step;
/* dapm */
struct list_head dapm_widgets;
struct list_head dapm_paths;
unsigned int dapm_state;
unsigned int suspend_dapm_state;
/* codec DAI's */
struct snd_soc_codec_dai *dai;
unsigned int num_dai;
};
/* codec device */
struct snd_soc_codec_device {
int (*probe)(struct platform_device *pdev);
int (*remove)(struct platform_device *pdev);
int (*suspend)(struct platform_device *pdev, pm_message_t state);
int (*resume)(struct platform_device *pdev);
};
/* SoC platform interface */
struct snd_soc_platform {
char *name;
int (*probe)(struct platform_device *pdev);
int (*remove)(struct platform_device *pdev);
int (*suspend)(struct platform_device *pdev,
struct snd_soc_cpu_dai *cpu_dai);
int (*resume)(struct platform_device *pdev,
struct snd_soc_cpu_dai *cpu_dai);
/* pcm creation and destruction */
int (*pcm_new)(struct snd_card *, struct snd_soc_codec_dai *,
struct snd_pcm *);
void (*pcm_free)(struct snd_pcm *);
/* platform stream ops */
struct snd_pcm_ops *pcm_ops;
};
/* SoC machine DAI configuration, glues a codec and cpu DAI together */
struct snd_soc_dai_link {
char *name; /* Codec name */
char *stream_name; /* Stream name */
/* DAI */
struct snd_soc_codec_dai *codec_dai;
struct snd_soc_cpu_dai *cpu_dai;
u32 flags; /* DAI config preference flags */
/* codec/machine specific init - e.g. add machine controls */
int (*init)(struct snd_soc_codec *codec);
/* audio sysclock configuration */
unsigned int (*config_sysclk)(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_clock_info *info);
};
/* SoC machine */
struct snd_soc_machine {
char *name;
int (*probe)(struct platform_device *pdev);
int (*remove)(struct platform_device *pdev);
/* the pre and post PM functions are used to do any PM work before and
* after the codec and DAI's do any PM work. */
int (*suspend_pre)(struct platform_device *pdev, pm_message_t state);
int (*suspend_post)(struct platform_device *pdev, pm_message_t state);
int (*resume_pre)(struct platform_device *pdev);
int (*resume_post)(struct platform_device *pdev);
/* machine stream operations */
struct snd_soc_ops *ops;
/* CPU <--> Codec DAI links */
struct snd_soc_dai_link *dai_link;
int num_links;
};
/* SoC Device - the audio subsystem */
struct snd_soc_device {
struct device *dev;
struct snd_soc_machine *machine;
struct snd_soc_platform *platform;
struct snd_soc_codec *codec;
struct snd_soc_codec_device *codec_dev;
void *codec_data;
};
/* runtime channel data */
struct snd_soc_pcm_runtime {
struct snd_soc_codec_dai *codec_dai;
struct snd_soc_cpu_dai *cpu_dai;
struct snd_soc_device *socdev;
};
/* enumerated kcontrol */
struct soc_enum {
unsigned short reg;
unsigned short reg2;
unsigned char shift_l;
unsigned char shift_r;
unsigned int mask;
const char **texts;
void *dapm;
};
/* clocking configuration data */
struct snd_soc_clock_info {
unsigned int rate;
unsigned int fs;
unsigned int bclk_master;
};
#endif
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