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Commit a7930ed4 authored Jan 14, 2013 by Kuninori Morimoto Committed by Mark Brown Jan 27, 2013

ASoC: add snd_soc_of_parse_daifmt() for DeviceTree



This patch adds snd_soc_of_parse_daifmt() and supports below style on DT.

        [prefix]format = "i2c";
        [prefix]clock-gating = "continuous";
        [prefix]bitclock-inversion;
        [prefix]bitclock-master;
        [prefix]frame-master;

Each driver can use specific [prefix]
(ex simple-card,cpu,dai,format = xxx;)

This sample will be
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CONT |
SND_SOC_DAIFMT_IB_NF | SND_SOC_DAIFMT_CBM_CFM

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

parent 949db153

include/sound/soc.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -1171,6 +1171,8 @@ int snd_soc_of_parse_card_name(struct snd_soc_card *card,
		const char *propname);
		int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
		const char *propname);
		unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
		const char *prefix);

		#include <sound/soc-dai.h>

sound/soc/soc-core.c

+115 −0

Original line number	Diff line number	Diff line
		@@ -4208,6 +4208,121 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
		}
		EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);

		unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
		const char *prefix)
		{
		int ret, i;
		char prop[128];
		unsigned int format = 0;
		int bit, frame;
		const char *str;
		struct {
		char *name;
		unsigned int val;
		} of_fmt_table[] = {
		{ "i2s", SND_SOC_DAIFMT_I2S },
		{ "right_j", SND_SOC_DAIFMT_RIGHT_J },
		{ "left_j", SND_SOC_DAIFMT_LEFT_J },
		{ "dsp_a", SND_SOC_DAIFMT_DSP_A },
		{ "dsp_b", SND_SOC_DAIFMT_DSP_B },
		{ "ac97", SND_SOC_DAIFMT_AC97 },
		{ "pdm", SND_SOC_DAIFMT_PDM},
		{ "msb", SND_SOC_DAIFMT_MSB },
		{ "lsb", SND_SOC_DAIFMT_LSB },
		}, of_clock_table[] = {
		{ "continuous", SND_SOC_DAIFMT_CONT },
		{ "gated", SND_SOC_DAIFMT_GATED },
		};

		if (!prefix)
		prefix = "";

		/*
		* check "[prefix]format = xxx"
		* SND_SOC_DAIFMT_FORMAT_MASK area
		*/
		snprintf(prop, sizeof(prop), "%sformat", prefix);
		ret = of_property_read_string(np, prop, &str);
		if (ret == 0) {
		for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
		if (strcmp(str, of_fmt_table[i].name) == 0) {
		format \|= of_fmt_table[i].val;
		break;
		}
		}
		}

		/*
		* check "[prefix]clock-gating = xxx"
		* SND_SOC_DAIFMT_CLOCK_MASK area
		*/
		snprintf(prop, sizeof(prop), "%sclock-gating", prefix);
		ret = of_property_read_string(np, prop, &str);
		if (ret == 0) {
		for (i = 0; i < ARRAY_SIZE(of_clock_table); i++) {
		if (strcmp(str, of_clock_table[i].name) == 0) {
		format \|= of_clock_table[i].val;
		break;
		}
		}
		}

		/*
		* check "[prefix]bitclock-inversion"
		* check "[prefix]frame-inversion"
		* SND_SOC_DAIFMT_INV_MASK area
		*/
		snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
		bit = !!of_get_property(np, prop, NULL);

		snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
		frame = !!of_get_property(np, prop, NULL);

		switch ((bit << 4) + frame) {
		case 0x11:
		format \|= SND_SOC_DAIFMT_IB_IF;
		break;
		case 0x10:
		format \|= SND_SOC_DAIFMT_IB_NF;
		break;
		case 0x01:
		format \|= SND_SOC_DAIFMT_NB_IF;
		break;
		default:
		/* SND_SOC_DAIFMT_NB_NF is default */
		break;
		}

		/*
		* check "[prefix]bitclock-master"
		* check "[prefix]frame-master"
		* SND_SOC_DAIFMT_MASTER_MASK area
		*/
		snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
		bit = !!of_get_property(np, prop, NULL);

		snprintf(prop, sizeof(prop), "%sframe-master", prefix);
		frame = !!of_get_property(np, prop, NULL);

		switch ((bit << 4) + frame) {
		case 0x11:
		format \|= SND_SOC_DAIFMT_CBM_CFM;
		break;
		case 0x10:
		format \|= SND_SOC_DAIFMT_CBM_CFS;
		break;
		case 0x01:
		format \|= SND_SOC_DAIFMT_CBS_CFM;
		break;
		default:
		format \|= SND_SOC_DAIFMT_CBS_CFS;
		break;
		}

		return format;
		}
		EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);

		static int __init snd_soc_init(void)
		{
		#ifdef CONFIG_DEBUG_FS