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authorLiam Girdwood <lg@opensource.wolfsonmicro.com>2006-10-19 20:35:56 +0200
committerJaroslav Kysela <perex@suse.cz>2007-02-09 09:01:07 +0100
commita71a468a50f1385855e28864e26251b02df829bb (patch)
tree243daee96ea5c55c88a186aa03b7917f7ad533f6 /include/sound/soc.h
parent543a0fbe18d0b44f3d037fe6b59458fa0c0d5e4b (diff)
[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>
Diffstat (limited to 'include/sound/soc.h')
-rw-r--r--include/sound/soc.h23
1 files changed, 14 insertions, 9 deletions
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 <sound/control.h>
#include <sound/ac97_codec.h>
-#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 */
};