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authorLars-Peter Clausen <lars@metafoo.de>2014-03-18 12:02:07 +0400
committerMark Brown <broonie@linaro.org>2014-04-14 20:22:43 +0400
commit96241c83293de346037b9a85e321f52ace210926 (patch)
treec841a3ce936cf74786532027d5cc82609b58edb7 /sound/soc/soc-io.c
parent6137a5ca326dac848b35bcbdc44b2ff890273375 (diff)
downloadlinux-96241c83293de346037b9a85e321f52ace210926.tar.xz
ASoC: Move IO functions to soc-io.c
soc-core.c is getting quite crowded. Move all IO related functions that are still in soc-core.c to soc-io.c Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/soc-io.c')
-rw-r--r--sound/soc/soc-io.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/sound/soc/soc-io.c b/sound/soc/soc-io.c
index 260efc8466fc..bfd7206c178f 100644
--- a/sound/soc/soc-io.c
+++ b/sound/soc/soc-io.c
@@ -19,6 +19,150 @@
#include <trace/events/asoc.h>
+unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+ unsigned int ret;
+
+ ret = codec->read(codec, reg);
+ dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
+ trace_snd_soc_reg_read(codec, reg, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_read);
+
+unsigned int snd_soc_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int val)
+{
+ dev_dbg(codec->dev, "write %x = %x\n", reg, val);
+ trace_snd_soc_reg_write(codec, reg, val);
+ return codec->write(codec, reg, val);
+}
+EXPORT_SYMBOL_GPL(snd_soc_write);
+
+/**
+ * snd_soc_update_bits - update codec register bits
+ * @codec: audio codec
+ * @reg: codec register
+ * @mask: register mask
+ * @value: new value
+ *
+ * Writes new register value.
+ *
+ * Returns 1 for change, 0 for no change, or negative error code.
+ */
+int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
+ unsigned int mask, unsigned int value)
+{
+ bool change;
+ unsigned int old, new;
+ int ret;
+
+ if (codec->using_regmap) {
+ ret = regmap_update_bits_check(codec->control_data, reg,
+ mask, value, &change);
+ } else {
+ ret = snd_soc_read(codec, reg);
+ if (ret < 0)
+ return ret;
+
+ old = ret;
+ new = (old & ~mask) | (value & mask);
+ change = old != new;
+ if (change)
+ ret = snd_soc_write(codec, reg, new);
+ }
+
+ if (ret < 0)
+ return ret;
+
+ return change;
+}
+EXPORT_SYMBOL_GPL(snd_soc_update_bits);
+
+/**
+ * snd_soc_update_bits_locked - update codec register bits
+ * @codec: audio codec
+ * @reg: codec register
+ * @mask: register mask
+ * @value: new value
+ *
+ * Writes new register value, and takes the codec mutex.
+ *
+ * Returns 1 for change else 0.
+ */
+int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
+ unsigned short reg, unsigned int mask,
+ unsigned int value)
+{
+ int change;
+
+ mutex_lock(&codec->mutex);
+ change = snd_soc_update_bits(codec, reg, mask, value);
+ mutex_unlock(&codec->mutex);
+
+ return change;
+}
+EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
+
+/**
+ * snd_soc_test_bits - test register for change
+ * @codec: audio codec
+ * @reg: codec register
+ * @mask: register mask
+ * @value: new value
+ *
+ * Tests a register with a new value and checks if the new value is
+ * different from the old value.
+ *
+ * Returns 1 for change else 0.
+ */
+int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
+ unsigned int mask, unsigned int value)
+{
+ int change;
+ unsigned int old, new;
+
+ old = snd_soc_read(codec, reg);
+ new = (old & ~mask) | value;
+ change = old != new;
+
+ return change;
+}
+EXPORT_SYMBOL_GPL(snd_soc_test_bits);
+
+int snd_soc_platform_read(struct snd_soc_platform *platform,
+ unsigned int reg)
+{
+ unsigned int ret;
+
+ if (!platform->driver->read) {
+ dev_err(platform->dev, "ASoC: platform has no read back\n");
+ return -1;
+ }
+
+ ret = platform->driver->read(platform, reg);
+ dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
+ trace_snd_soc_preg_read(platform, reg, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_platform_read);
+
+int snd_soc_platform_write(struct snd_soc_platform *platform,
+ unsigned int reg, unsigned int val)
+{
+ if (!platform->driver->write) {
+ dev_err(platform->dev, "ASoC: platform has no write back\n");
+ return -1;
+ }
+
+ dev_dbg(platform->dev, "write %x = %x\n", reg, val);
+ trace_snd_soc_preg_write(platform, reg, val);
+ return platform->driver->write(platform, reg, val);
+}
+EXPORT_SYMBOL_GPL(snd_soc_platform_write);
+
#ifdef CONFIG_REGMAP
static int hw_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)