forked from Minki/linux
22853223d1
Use the recently added support for bus operations to provide a standard mapping for AC'97 register I/O. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
|
|
* Register map access API - AC'97 support
|
|
*
|
|
* Copyright 2013 Linaro Ltd. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <sound/ac97_codec.h>
|
|
|
|
bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case AC97_RESET:
|
|
case AC97_POWERDOWN:
|
|
case AC97_INT_PAGING:
|
|
case AC97_EXTENDED_ID:
|
|
case AC97_EXTENDED_STATUS:
|
|
case AC97_EXTENDED_MID:
|
|
case AC97_EXTENDED_MSTATUS:
|
|
case AC97_GPIO_STATUS:
|
|
case AC97_MISC_AFE:
|
|
case AC97_VENDOR_ID1:
|
|
case AC97_VENDOR_ID2:
|
|
case AC97_CODEC_CLASS_REV:
|
|
case AC97_PCI_SVID:
|
|
case AC97_PCI_SID:
|
|
case AC97_FUNC_SELECT:
|
|
case AC97_FUNC_INFO:
|
|
case AC97_SENSE_INFO:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile);
|
|
|
|
static int regmap_ac97_reg_read(void *context, unsigned int reg,
|
|
unsigned int *val)
|
|
{
|
|
struct snd_ac97 *ac97 = context;
|
|
|
|
*val = ac97->bus->ops->read(ac97, reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int regmap_ac97_reg_write(void *context, unsigned int reg,
|
|
unsigned int val)
|
|
{
|
|
struct snd_ac97 *ac97 = context;
|
|
|
|
ac97->bus->ops->write(ac97, reg, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct regmap_bus ac97_regmap_bus = {
|
|
.reg_write = regmap_ac97_reg_write,
|
|
.reg_read = regmap_ac97_reg_read,
|
|
};
|
|
|
|
/**
|
|
* regmap_init_ac97(): Initialise AC'97 register map
|
|
*
|
|
* @ac97: Device that will be interacted with
|
|
* @config: Configuration for register map
|
|
*
|
|
* The return value will be an ERR_PTR() on error or a valid pointer to
|
|
* a struct regmap.
|
|
*/
|
|
struct regmap *regmap_init_ac97(struct snd_ac97 *ac97,
|
|
const struct regmap_config *config)
|
|
{
|
|
return regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config);
|
|
}
|
|
EXPORT_SYMBOL_GPL(regmap_init_ac97);
|
|
|
|
/**
|
|
* devm_regmap_init_ac97(): Initialise AC'97 register map
|
|
*
|
|
* @ac97: Device that will be interacted with
|
|
* @config: Configuration for register map
|
|
*
|
|
* The return value will be an ERR_PTR() on error or a valid pointer
|
|
* to a struct regmap. The regmap will be automatically freed by the
|
|
* device management code.
|
|
*/
|
|
struct regmap *devm_regmap_init_ac97(struct snd_ac97 *ac97,
|
|
const struct regmap_config *config)
|
|
{
|
|
return devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config);
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_regmap_init_ac97);
|
|
|
|
MODULE_LICENSE("GPL v2");
|