[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/sound/soc/soc-cache.c b/ap/os/linux/linux-3.4.x/sound/soc/soc-cache.c
new file mode 100644
index 0000000..9d56f02
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/sound/soc/soc-cache.c
@@ -0,0 +1,340 @@
+/*
+ * soc-cache.c -- ASoC register cache helpers
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <sound/soc.h>
+#include <linux/bitmap.h>
+#include <linux/rbtree.h>
+#include <linux/export.h>
+
+#include <trace/events/asoc.h>
+
+static bool snd_soc_set_cache_val(void *base, unsigned int idx,
+ unsigned int val, unsigned int word_size)
+{
+ switch (word_size) {
+ case 1: {
+ u8 *cache = base;
+ if (cache[idx] == val)
+ return true;
+ cache[idx] = val;
+ break;
+ }
+ case 2: {
+ u16 *cache = base;
+ if (cache[idx] == val)
+ return true;
+ cache[idx] = val;
+ break;
+ }
+ default:
+ BUG();
+ }
+ return false;
+}
+
+static unsigned int snd_soc_get_cache_val(const void *base, unsigned int idx,
+ unsigned int word_size)
+{
+ if (!base)
+ return -1;
+
+ switch (word_size) {
+ case 1: {
+ const u8 *cache = base;
+ return cache[idx];
+ }
+ case 2: {
+ const u16 *cache = base;
+ return cache[idx];
+ }
+ default:
+ BUG();
+ }
+ /* unreachable */
+ return -1;
+}
+
+static int snd_soc_flat_cache_sync(struct snd_soc_codec *codec)
+{
+ int i;
+ int ret;
+ const struct snd_soc_codec_driver *codec_drv;
+ unsigned int val;
+
+ codec_drv = codec->driver;
+ for (i = 0; i < codec_drv->reg_cache_size; ++i) {
+ ret = snd_soc_cache_read(codec, i, &val);
+ if (ret)
+ return ret;
+ if (codec->reg_def_copy)
+ if (snd_soc_get_cache_val(codec->reg_def_copy,
+ i, codec_drv->reg_word_size) == val)
+ continue;
+
+ WARN_ON(!snd_soc_codec_writable_register(codec, i));
+
+ ret = snd_soc_write(codec, i, val);
+ if (ret)
+ return ret;
+ dev_dbg(codec->dev, "Synced register %#x, value = %#x\n",
+ i, val);
+ }
+ return 0;
+}
+
+static int snd_soc_flat_cache_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value)
+{
+ snd_soc_set_cache_val(codec->reg_cache, reg, value,
+ codec->driver->reg_word_size);
+ return 0;
+}
+
+static int snd_soc_flat_cache_read(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int *value)
+{
+ *value = snd_soc_get_cache_val(codec->reg_cache, reg,
+ codec->driver->reg_word_size);
+ return 0;
+}
+
+static int snd_soc_flat_cache_exit(struct snd_soc_codec *codec)
+{
+ if (!codec->reg_cache)
+ return 0;
+ kfree(codec->reg_cache);
+ codec->reg_cache = NULL;
+ return 0;
+}
+
+static int snd_soc_flat_cache_init(struct snd_soc_codec *codec)
+{
+ if (codec->reg_def_copy)
+ codec->reg_cache = kmemdup(codec->reg_def_copy,
+ codec->reg_size, GFP_KERNEL);
+ else
+ codec->reg_cache = kzalloc(codec->reg_size, GFP_KERNEL);
+ if (!codec->reg_cache)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/* an array of all supported compression types */
+static const struct snd_soc_cache_ops cache_types[] = {
+ /* Flat *must* be the first entry for fallback */
+ {
+ .id = SND_SOC_FLAT_COMPRESSION,
+ .name = "flat",
+ .init = snd_soc_flat_cache_init,
+ .exit = snd_soc_flat_cache_exit,
+ .read = snd_soc_flat_cache_read,
+ .write = snd_soc_flat_cache_write,
+ .sync = snd_soc_flat_cache_sync
+ },
+};
+
+int snd_soc_cache_init(struct snd_soc_codec *codec)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cache_types); ++i)
+ if (cache_types[i].id == codec->compress_type)
+ break;
+
+ /* Fall back to flat compression */
+ if (i == ARRAY_SIZE(cache_types)) {
+ dev_warn(codec->dev, "Could not match compress type: %d\n",
+ codec->compress_type);
+ i = 0;
+ }
+
+ mutex_init(&codec->cache_rw_mutex);
+ codec->cache_ops = &cache_types[i];
+
+ if (codec->cache_ops->init) {
+ if (codec->cache_ops->name)
+ dev_dbg(codec->dev, "Initializing %s cache for %s codec\n",
+ codec->cache_ops->name, codec->name);
+ return codec->cache_ops->init(codec);
+ }
+ return -ENOSYS;
+}
+
+/*
+ * NOTE: keep in mind that this function might be called
+ * multiple times.
+ */
+int snd_soc_cache_exit(struct snd_soc_codec *codec)
+{
+ if (codec->cache_ops && codec->cache_ops->exit) {
+ if (codec->cache_ops->name)
+ dev_dbg(codec->dev, "Destroying %s cache for %s codec\n",
+ codec->cache_ops->name, codec->name);
+ return codec->cache_ops->exit(codec);
+ }
+ return -ENOSYS;
+}
+
+/**
+ * snd_soc_cache_read: Fetch the value of a given register from the cache.
+ *
+ * @codec: CODEC to configure.
+ * @reg: The register index.
+ * @value: The value to be returned.
+ */
+int snd_soc_cache_read(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int *value)
+{
+ int ret;
+
+ mutex_lock(&codec->cache_rw_mutex);
+
+ if (value && codec->cache_ops && codec->cache_ops->read) {
+ ret = codec->cache_ops->read(codec, reg, value);
+ mutex_unlock(&codec->cache_rw_mutex);
+ return ret;
+ }
+
+ mutex_unlock(&codec->cache_rw_mutex);
+ return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cache_read);
+
+/**
+ * snd_soc_cache_write: Set the value of a given register in the cache.
+ *
+ * @codec: CODEC to configure.
+ * @reg: The register index.
+ * @value: The new register value.
+ */
+int snd_soc_cache_write(struct snd_soc_codec *codec,
+ unsigned int reg, unsigned int value)
+{
+ int ret;
+
+ mutex_lock(&codec->cache_rw_mutex);
+
+ if (codec->cache_ops && codec->cache_ops->write) {
+ ret = codec->cache_ops->write(codec, reg, value);
+ mutex_unlock(&codec->cache_rw_mutex);
+ return ret;
+ }
+
+ mutex_unlock(&codec->cache_rw_mutex);
+ return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cache_write);
+
+/**
+ * snd_soc_cache_sync: Sync the register cache with the hardware.
+ *
+ * @codec: CODEC to configure.
+ *
+ * Any registers that should not be synced should be marked as
+ * volatile. In general drivers can choose not to use the provided
+ * syncing functionality if they so require.
+ */
+int snd_soc_cache_sync(struct snd_soc_codec *codec)
+{
+ int ret;
+ const char *name;
+
+ if (!codec->cache_sync) {
+ return 0;
+ }
+
+ if (!codec->cache_ops || !codec->cache_ops->sync)
+ return -ENOSYS;
+
+ if (codec->cache_ops->name)
+ name = codec->cache_ops->name;
+ else
+ name = "unknown";
+
+ if (codec->cache_ops->name)
+ dev_dbg(codec->dev, "Syncing %s cache for %s codec\n",
+ codec->cache_ops->name, codec->name);
+ trace_snd_soc_cache_sync(codec, name, "start");
+ ret = codec->cache_ops->sync(codec);
+ if (!ret)
+ codec->cache_sync = 0;
+ trace_snd_soc_cache_sync(codec, name, "end");
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_cache_sync);
+
+static int snd_soc_get_reg_access_index(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ const struct snd_soc_codec_driver *codec_drv;
+ unsigned int min, max, index;
+
+ codec_drv = codec->driver;
+ min = 0;
+ max = codec_drv->reg_access_size - 1;
+ do {
+ index = (min + max) / 2;
+ if (codec_drv->reg_access_default[index].reg == reg)
+ return index;
+ if (codec_drv->reg_access_default[index].reg < reg)
+ min = index + 1;
+ else
+ max = index;
+ } while (min <= max);
+ return -1;
+}
+
+int snd_soc_default_volatile_register(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ int index;
+
+ if (reg >= codec->driver->reg_cache_size)
+ return 1;
+ index = snd_soc_get_reg_access_index(codec, reg);
+ if (index < 0)
+ return 0;
+ return codec->driver->reg_access_default[index].vol;
+}
+EXPORT_SYMBOL_GPL(snd_soc_default_volatile_register);
+
+int snd_soc_default_readable_register(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ int index;
+
+ if (reg >= codec->driver->reg_cache_size)
+ return 1;
+ index = snd_soc_get_reg_access_index(codec, reg);
+ if (index < 0)
+ return 0;
+ return codec->driver->reg_access_default[index].read;
+}
+EXPORT_SYMBOL_GPL(snd_soc_default_readable_register);
+
+int snd_soc_default_writable_register(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ int index;
+
+ if (reg >= codec->driver->reg_cache_size)
+ return 1;
+ index = snd_soc_get_reg_access_index(codec, reg);
+ if (index < 0)
+ return 0;
+ return codec->driver->reg_access_default[index].write;
+}
+EXPORT_SYMBOL_GPL(snd_soc_default_writable_register);