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snd_ac97_compat.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016 Robert Jarzmik <[email protected]>
*/
#include <linux/list.h>
#include <linux/slab.h>
#include <sound/ac97/codec.h>
#include <sound/ac97/compat.h>
#include <sound/ac97/controller.h>
#include <sound/soc.h>
#include "ac97_core.h"
static void compat_ac97_release(struct device *dev)
{
kfree(to_ac97_t(dev));
}
static void compat_ac97_reset(struct snd_ac97 *ac97)
{
struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
struct ac97_controller *actrl = adev->ac97_ctrl;
if (actrl->ops->reset)
actrl->ops->reset(actrl);
}
static void compat_ac97_warm_reset(struct snd_ac97 *ac97)
{
struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
struct ac97_controller *actrl = adev->ac97_ctrl;
if (actrl->ops->warm_reset)
actrl->ops->warm_reset(actrl);
}
static void compat_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
unsigned short val)
{
struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
struct ac97_controller *actrl = adev->ac97_ctrl;
actrl->ops->write(actrl, ac97->num, reg, val);
}
static unsigned short compat_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
struct ac97_controller *actrl = adev->ac97_ctrl;
return actrl->ops->read(actrl, ac97->num, reg);
}
static struct snd_ac97_bus_ops compat_snd_ac97_bus_ops = {
.reset = compat_ac97_reset,
.warm_reset = compat_ac97_warm_reset,
.write = compat_ac97_write,
.read = compat_ac97_read,
};
static struct snd_ac97_bus compat_soc_ac97_bus = {
.ops = &compat_snd_ac97_bus_ops,
};
struct snd_ac97 *snd_ac97_compat_alloc(struct ac97_codec_device *adev)
{
struct snd_ac97 *ac97;
int ret;
ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
if (ac97 == NULL)
return ERR_PTR(-ENOMEM);
ac97->private_data = adev;
ac97->bus = &compat_soc_ac97_bus;
ac97->dev.parent = &adev->dev;
ac97->dev.release = compat_ac97_release;
dev_set_name(&ac97->dev, "%s-compat", dev_name(&adev->dev));
ret = device_register(&ac97->dev);
if (ret) {
put_device(&ac97->dev);
return ERR_PTR(ret);
}
return ac97;
}
EXPORT_SYMBOL_GPL(snd_ac97_compat_alloc);
void snd_ac97_compat_release(struct snd_ac97 *ac97)
{
device_unregister(&ac97->dev);
}
EXPORT_SYMBOL_GPL(snd_ac97_compat_release);
int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id,
unsigned int id_mask)
{
struct ac97_codec_device *adev = to_ac97_device(ac97->private_data);
struct ac97_controller *actrl = adev->ac97_ctrl;
unsigned int scanned;
if (try_warm) {
compat_ac97_warm_reset(ac97);
scanned = snd_ac97_bus_scan_one(actrl, adev->num);
if (ac97_ids_match(scanned, adev->vendor_id, id_mask))
return 1;
}
compat_ac97_reset(ac97);
compat_ac97_warm_reset(ac97);
scanned = snd_ac97_bus_scan_one(actrl, adev->num);
if (ac97_ids_match(scanned, adev->vendor_id, id_mask))
return 0;
return -ENODEV;
}
EXPORT_SYMBOL_GPL(snd_ac97_reset);