diff options
author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2020-06-04 10:08:03 +0200 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2020-06-15 19:21:26 +0200 |
commit | 460b42d162e3cf634586999e6a84e74ca52e626d (patch) | |
tree | 4d1c5dc40ea4f766425cf0a510bf8e4245b40918 /sound/soc/soc-component.c | |
parent | ASoC: soc-component: add snd_soc_component_init() (diff) | |
download | linux-460b42d162e3cf634586999e6a84e74ca52e626d.tar.xz linux-460b42d162e3cf634586999e6a84e74ca52e626d.zip |
ASoC: soc-component: merge soc-io.c into soc-component.c
soc-io.c has snd_soc_component_xxx() functions for I/O.
We have soc-componennt.c for it.
Let's merge soc-io.c into soc-component.c
By this patch, original soc-io.c functions start to use
soc_component_err() when error case.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/87h7vrw8ws.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/soc-component.c')
-rw-r--r-- | sound/soc/soc-component.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c index 7624ff5b67d3..d121f5f7633c 100644 --- a/sound/soc/soc-component.c +++ b/sound/soc/soc-component.c @@ -2,7 +2,10 @@ // // soc-component.c // +// Copyright 2009-2011 Wolfson Microelectronics PLC. // Copyright (C) 2019 Renesas Electronics Corp. +// +// Mark Brown <broonie@opensource.wolfsonmicro.com> // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> // #include <linux/module.h> @@ -400,6 +403,197 @@ EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap); #endif +/** + * snd_soc_component_read() - Read register value + * @component: Component to read from + * @reg: Register to read + * @val: Pointer to where the read value is stored + * + * Return: 0 on success, a negative error code otherwise. + */ +int snd_soc_component_read(struct snd_soc_component *component, + unsigned int reg, unsigned int *val) +{ + int ret; + + if (component->regmap) + ret = regmap_read(component->regmap, reg, val); + else if (component->driver->read) { + *val = component->driver->read(component, reg); + ret = 0; + } + else + ret = -EIO; + + return soc_component_ret(component, ret); +} +EXPORT_SYMBOL_GPL(snd_soc_component_read); + +unsigned int snd_soc_component_read32(struct snd_soc_component *component, + unsigned int reg) +{ + unsigned int val; + int ret; + + ret = snd_soc_component_read(component, reg, &val); + if (ret < 0) + return soc_component_ret(component, -1); + + return val; +} +EXPORT_SYMBOL_GPL(snd_soc_component_read32); + +/** + * snd_soc_component_write() - Write register value + * @component: Component to write to + * @reg: Register to write + * @val: Value to write to the register + * + * Return: 0 on success, a negative error code otherwise. + */ +int snd_soc_component_write(struct snd_soc_component *component, + unsigned int reg, unsigned int val) +{ + int ret = -EIO; + + if (component->regmap) + ret = regmap_write(component->regmap, reg, val); + else if (component->driver->write) + ret = component->driver->write(component, reg, val); + + return soc_component_ret(component, ret); +} +EXPORT_SYMBOL_GPL(snd_soc_component_write); + +static int snd_soc_component_update_bits_legacy( + struct snd_soc_component *component, unsigned int reg, + unsigned int mask, unsigned int val, bool *change) +{ + unsigned int old, new; + int ret; + + mutex_lock(&component->io_mutex); + + ret = snd_soc_component_read(component, reg, &old); + if (ret < 0) + goto out_unlock; + + new = (old & ~mask) | (val & mask); + *change = old != new; + if (*change) + ret = snd_soc_component_write(component, reg, new); +out_unlock: + mutex_unlock(&component->io_mutex); + + return soc_component_ret(component, ret); +} + +/** + * snd_soc_component_update_bits() - Perform read/modify/write cycle + * @component: Component to update + * @reg: Register to update + * @mask: Mask that specifies which bits to update + * @val: New value for the bits specified by mask + * + * Return: 1 if the operation was successful and the value of the register + * changed, 0 if the operation was successful, but the value did not change. + * Returns a negative error code otherwise. + */ +int snd_soc_component_update_bits(struct snd_soc_component *component, + unsigned int reg, unsigned int mask, unsigned int val) +{ + bool change; + int ret; + + if (component->regmap) + ret = regmap_update_bits_check(component->regmap, reg, mask, + val, &change); + else + ret = snd_soc_component_update_bits_legacy(component, reg, + mask, val, &change); + + if (ret < 0) + return soc_component_ret(component, ret); + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_component_update_bits); + +/** + * snd_soc_component_update_bits_async() - Perform asynchronous + * read/modify/write cycle + * @component: Component to update + * @reg: Register to update + * @mask: Mask that specifies which bits to update + * @val: New value for the bits specified by mask + * + * This function is similar to snd_soc_component_update_bits(), but the update + * operation is scheduled asynchronously. This means it may not be completed + * when the function returns. To make sure that all scheduled updates have been + * completed snd_soc_component_async_complete() must be called. + * + * Return: 1 if the operation was successful and the value of the register + * changed, 0 if the operation was successful, but the value did not change. + * Returns a negative error code otherwise. + */ +int snd_soc_component_update_bits_async(struct snd_soc_component *component, + unsigned int reg, unsigned int mask, unsigned int val) +{ + bool change; + int ret; + + if (component->regmap) + ret = regmap_update_bits_check_async(component->regmap, reg, + mask, val, &change); + else + ret = snd_soc_component_update_bits_legacy(component, reg, + mask, val, &change); + + if (ret < 0) + return soc_component_ret(component, ret); + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_component_update_bits_async); + +/** + * snd_soc_component_async_complete() - Ensure asynchronous I/O has completed + * @component: Component for which to wait + * + * This function blocks until all asynchronous I/O which has previously been + * scheduled using snd_soc_component_update_bits_async() has completed. + */ +void snd_soc_component_async_complete(struct snd_soc_component *component) +{ + if (component->regmap) + regmap_async_complete(component->regmap); +} +EXPORT_SYMBOL_GPL(snd_soc_component_async_complete); + +/** + * snd_soc_component_test_bits - Test register for change + * @component: component + * @reg: Register to test + * @mask: Mask that specifies which bits to test + * @value: Value to test against + * + * Tests a register with a new value and checks if the new value is + * different from the old value. + * + * Return: 1 for change, otherwise 0. + */ +int snd_soc_component_test_bits(struct snd_soc_component *component, + unsigned int reg, unsigned int mask, unsigned int value) +{ + unsigned int old, new; + int ret; + + ret = snd_soc_component_read(component, reg, &old); + if (ret < 0) + return soc_component_ret(component, ret); + new = (old & ~mask) | value; + return old != new; +} +EXPORT_SYMBOL_GPL(snd_soc_component_test_bits); + int snd_soc_pcm_component_pointer(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; |