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-rw-r--r--sound/soc/soc-core.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 7365afbc5e18..8df1b3feaf2b 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -4218,6 +4218,113 @@ 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 },
+ };
+
+ 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]continuous-clock"
+ * SND_SOC_DAIFMT_CLOCK_MASK area
+ */
+ snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
+ if (of_get_property(np, prop, NULL))
+ format |= SND_SOC_DAIFMT_CONT;
+ else
+ format |= SND_SOC_DAIFMT_GATED;
+
+ /*
+ * 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