102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright(c) 2020 Intel Corporation.
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/soundwire/sdw.h>
|
|
#include <linux/soundwire/sdw_registers.h>
|
|
#include "internal.h"
|
|
|
|
static int regmap_sdw_mbq_write(void *context, unsigned int reg, unsigned int val)
|
|
{
|
|
struct device *dev = context;
|
|
struct sdw_slave *slave = dev_to_sdw_dev(dev);
|
|
int ret;
|
|
|
|
ret = sdw_write_no_pm(slave, SDW_SDCA_MBQ_CTL(reg), (val >> 8) & 0xff);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return sdw_write_no_pm(slave, reg, val & 0xff);
|
|
}
|
|
|
|
static int regmap_sdw_mbq_read(void *context, unsigned int reg, unsigned int *val)
|
|
{
|
|
struct device *dev = context;
|
|
struct sdw_slave *slave = dev_to_sdw_dev(dev);
|
|
int read0;
|
|
int read1;
|
|
|
|
read0 = sdw_read_no_pm(slave, reg);
|
|
if (read0 < 0)
|
|
return read0;
|
|
|
|
read1 = sdw_read_no_pm(slave, SDW_SDCA_MBQ_CTL(reg));
|
|
if (read1 < 0)
|
|
return read1;
|
|
|
|
*val = (read1 << 8) | read0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct regmap_bus regmap_sdw_mbq = {
|
|
.reg_read = regmap_sdw_mbq_read,
|
|
.reg_write = regmap_sdw_mbq_write,
|
|
.reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
|
|
.val_format_endian_default = REGMAP_ENDIAN_LITTLE,
|
|
};
|
|
|
|
static int regmap_sdw_mbq_config_check(const struct regmap_config *config)
|
|
{
|
|
/* MBQ-based controls are only 16-bits for now */
|
|
if (config->val_bits != 16)
|
|
return -ENOTSUPP;
|
|
|
|
/* Registers are 32 bits wide */
|
|
if (config->reg_bits != 32)
|
|
return -ENOTSUPP;
|
|
|
|
if (config->pad_bits != 0)
|
|
return -ENOTSUPP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct regmap *__regmap_init_sdw_mbq(struct sdw_slave *sdw,
|
|
const struct regmap_config *config,
|
|
struct lock_class_key *lock_key,
|
|
const char *lock_name)
|
|
{
|
|
int ret;
|
|
|
|
ret = regmap_sdw_mbq_config_check(config);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
return __regmap_init(&sdw->dev, ®map_sdw_mbq,
|
|
&sdw->dev, config, lock_key, lock_name);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__regmap_init_sdw_mbq);
|
|
|
|
struct regmap *__devm_regmap_init_sdw_mbq(struct sdw_slave *sdw,
|
|
const struct regmap_config *config,
|
|
struct lock_class_key *lock_key,
|
|
const char *lock_name)
|
|
{
|
|
int ret;
|
|
|
|
ret = regmap_sdw_mbq_config_check(config);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
return __devm_regmap_init(&sdw->dev, ®map_sdw_mbq,
|
|
&sdw->dev, config, lock_key, lock_name);
|
|
}
|
|
EXPORT_SYMBOL_GPL(__devm_regmap_init_sdw_mbq);
|
|
|
|
MODULE_DESCRIPTION("Regmap SoundWire MBQ Module");
|
|
MODULE_LICENSE("GPL");
|