From a71a468a50f1385855e28864e26251b02df829bb Mon Sep 17 00:00:00 2001 From: Liam Girdwood Date: Thu, 19 Oct 2006 20:35:56 +0200 Subject: [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 Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- include/sound/soc.h | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) (limited to 'include/sound/soc.h') diff --git a/include/sound/soc.h b/include/sound/soc.h index ecdd1fac94b..3dfe052e078 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -21,7 +21,7 @@ #include #include -#define SND_SOC_VERSION "0.11.8" +#define SND_SOC_VERSION "0.12" /* * Convenience kcontrol builders @@ -141,19 +141,24 @@ /* bit clock dividers */ #define SND_SOC_FSBD(x) (1 << (x - 1)) /* ratio mclk:bclk */ #define SND_SOC_FSBD_REAL(x) (ffs(x)) -#define SND_SOC_FSBD_ALL 0xffff /* all bit clock dividers supported */ -/* bit clock ratio to sample rate */ -#define SND_SOC_FSB(x) (1 << ((x - 16) / 16)) -#define SND_SOC_FSB_REAL(x) (((ffs(x) - 1) * 16) + 16) +/* 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 SND_SOC_FSBD_ALL +#define SND_SOC_FSB_ALL ~0ULL /* * DAI hardware flags */ -/* use bfs mclk divider mode, else sample rate ratio */ -#define SND_SOC_DAI_BFS_DIV 0x1 +/* 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 @@ -264,7 +269,7 @@ struct snd_soc_dai_mode { u16 pcmdir:2; /* SND_SOC_HWDIR_* */ u16 flags:8; /* hw flags */ u16 fs; /* mclk to rate divider */ - u32 bfs; /* mclk to bclk dividers */ + u64 bfs; /* mclk to bclk dividers */ unsigned long priv; /* private mode data */ }; -- cgit v1.2.3