[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-io.c b/ap/os/linux/linux-3.4.x/sound/soc/soc-io.c
new file mode 100644
index 0000000..4d8dc6a
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/sound/soc/soc-io.c
@@ -0,0 +1,170 @@
+/*
+ * soc-io.c -- ASoC register I/O helpers
+ *
+ * Copyright 2009-2011 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 <linux/regmap.h>
+#include <linux/export.h>
+#include <sound/soc.h>
+
+#include <trace/events/asoc.h>
+
+#ifdef CONFIG_REGMAP
+static int hw_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ int ret;
+
+ if (!snd_soc_codec_volatile_register(codec, reg) &&
+ reg < codec->driver->reg_cache_size &&
+ !codec->cache_bypass) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
+
+ if (codec->cache_only) {
+ codec->cache_sync = 1;
+ return 0;
+ }
+
+ return regmap_write(codec->control_data, reg, value);
+}
+
+static unsigned int hw_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+ int ret;
+ unsigned int val;
+
+ if (reg >= codec->driver->reg_cache_size ||
+ snd_soc_codec_volatile_register(codec, reg) ||
+ codec->cache_bypass) {
+ if (codec->cache_only)
+ return -1;
+
+ ret = regmap_read(codec->control_data, reg, &val);
+ if (ret == 0)
+ return val;
+ else
+ return -1;
+ }
+
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
+}
+
+/* Primitive bulk write support for soc-cache. The data pointed to by
+ * `data' needs to already be in the form the hardware expects. Any
+ * data written through this function will not go through the cache as
+ * it only handles writing to volatile or out of bounds registers.
+ *
+ * This is currently only supported for devices using the regmap API
+ * wrappers.
+ */
+static int snd_soc_hw_bulk_write_raw(struct snd_soc_codec *codec,
+ unsigned int reg,
+ const void *data, size_t len)
+{
+ /* To ensure that we don't get out of sync with the cache, check
+ * whether the base register is volatile or if we've directly asked
+ * to bypass the cache. Out of bounds registers are considered
+ * volatile.
+ */
+ if (!codec->cache_bypass
+ && !snd_soc_codec_volatile_register(codec, reg)
+ && reg < codec->driver->reg_cache_size)
+ return -EINVAL;
+
+ return regmap_raw_write(codec->control_data, reg, data, len);
+}
+
+/**
+ * snd_soc_codec_set_cache_io: Set up standard I/O functions.
+ *
+ * @codec: CODEC to configure.
+ * @addr_bits: Number of bits of register address data.
+ * @data_bits: Number of bits of data per register.
+ * @control: Control bus used.
+ *
+ * Register formats are frequently shared between many I2C and SPI
+ * devices. In order to promote code reuse the ASoC core provides
+ * some standard implementations of CODEC read and write operations
+ * which can be set up using this function.
+ *
+ * The caller is responsible for allocating and initialising the
+ * actual cache.
+ *
+ * Note that at present this code cannot be used by CODECs with
+ * volatile registers.
+ */
+int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
+ int addr_bits, int data_bits,
+ enum snd_soc_control_type control)
+{
+ struct regmap_config config;
+ int ret;
+
+ memset(&config, 0, sizeof(config));
+ codec->write = hw_write;
+ codec->read = hw_read;
+ codec->bulk_write_raw = snd_soc_hw_bulk_write_raw;
+
+ config.reg_bits = addr_bits;
+ config.val_bits = data_bits;
+
+ switch (control) {
+#if defined(CONFIG_REGMAP_I2C) || defined(CONFIG_REGMAP_I2C_MODULE)
+ case SND_SOC_I2C:
+ codec->control_data = regmap_init_i2c(to_i2c_client(codec->dev),
+ &config);
+ break;
+#endif
+
+#if defined(CONFIG_REGMAP_SPI) || defined(CONFIG_REGMAP_SPI_MODULE)
+ case SND_SOC_SPI:
+ codec->control_data = regmap_init_spi(to_spi_device(codec->dev),
+ &config);
+ break;
+#endif
+
+ case SND_SOC_REGMAP:
+ /* Device has made its own regmap arrangements */
+ codec->using_regmap = true;
+
+ ret = regmap_get_val_bytes(codec->control_data);
+ /* Errors are legitimate for non-integer byte multiples */
+ if (ret > 0)
+ codec->val_bytes = ret;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (IS_ERR(codec->control_data))
+ return PTR_ERR(codec->control_data);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io);
+#else
+int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
+ int addr_bits, int data_bits,
+ enum snd_soc_control_type control)
+{
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(snd_soc_codec_set_cache_io);
+#endif