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Diffstat (limited to 'sound/soc/generic/simple-card-utils.c')
-rw-r--r--sound/soc/generic/simple-card-utils.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
new file mode 100644
index 000000000000..d89a9a1b2471
--- /dev/null
+++ b/sound/soc/generic/simple-card-utils.c
@@ -0,0 +1,97 @@
+/*
+ * simple-card-core.c
+ *
+ * Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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.
+ */
+#include <linux/of.h>
+#include <sound/simple_card_utils.h>
+
+int asoc_simple_card_parse_daifmt(struct device *dev,
+ struct device_node *node,
+ struct device_node *codec,
+ char *prefix,
+ unsigned int *retfmt)
+{
+ struct device_node *bitclkmaster = NULL;
+ struct device_node *framemaster = NULL;
+ int prefix_len = prefix ? strlen(prefix) : 0;
+ unsigned int daifmt;
+
+ daifmt = snd_soc_of_parse_daifmt(node, prefix,
+ &bitclkmaster, &framemaster);
+ daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
+
+ if (prefix_len && !bitclkmaster && !framemaster) {
+ /*
+ * No dai-link level and master setting was not found from
+ * sound node level, revert back to legacy DT parsing and
+ * take the settings from codec node.
+ */
+ dev_dbg(dev, "Revert to legacy daifmt parsing\n");
+
+ daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
+ (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
+ } else {
+ if (codec == bitclkmaster)
+ daifmt |= (codec == framemaster) ?
+ SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
+ else
+ daifmt |= (codec == framemaster) ?
+ SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
+ }
+
+ of_node_put(bitclkmaster);
+ of_node_put(framemaster);
+
+ *retfmt = daifmt;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_daifmt);
+
+int asoc_simple_card_set_dailink_name(struct device *dev,
+ struct snd_soc_dai_link *dai_link,
+ const char *fmt, ...)
+{
+ va_list ap;
+ char *name = NULL;
+ int ret = -ENOMEM;
+
+ va_start(ap, fmt);
+ name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
+ va_end(ap);
+
+ if (name) {
+ ret = 0;
+
+ dai_link->name = name;
+ dai_link->stream_name = name;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_set_dailink_name);
+
+int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
+ char *prefix)
+{
+ char prop[128];
+ int ret;
+
+ snprintf(prop, sizeof(prop), "%sname", prefix);
+
+ /* Parse the card name from DT */
+ ret = snd_soc_of_parse_card_name(card, prop);
+ if (ret < 0)
+ return ret;
+
+ if (!card->name && card->dai_link)
+ card->name = card->dai_link->name;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name);