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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HD audio Component Binding Interface
*
* Copyright (C) 2021, 2023 Cirrus Logic, Inc. and
* Cirrus Logic International Semiconductor Ltd.
*/
#include <linux/acpi.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <sound/hda_codec.h>
#include "hda_component.h"
#include "hda_local.h"
#ifdef CONFIG_ACPI
void hda_component_acpi_device_notify(struct hda_component_parent *parent,
acpi_handle handle, u32 event, void *data)
{
struct hda_component *comp;
int i;
mutex_lock(&parent->mutex);
for (i = 0; i < ARRAY_SIZE(parent->comps); i++) {
comp = hda_component_from_index(parent, i);
if (comp->dev && comp->acpi_notify)
comp->acpi_notify(acpi_device_handle(comp->adev), event, comp->dev);
}
mutex_unlock(&parent->mutex);
}
EXPORT_SYMBOL_NS_GPL(hda_component_acpi_device_notify, SND_HDA_SCODEC_COMPONENT);
int hda_component_manager_bind_acpi_notifications(struct hda_codec *cdc,
struct hda_component_parent *parent,
acpi_notify_handler handler, void *data)
{
bool support_notifications = false;
struct acpi_device *adev;
struct hda_component *comp;
int ret;
int i;
adev = parent->comps[0].adev;
if (!acpi_device_handle(adev))
return 0;
for (i = 0; i < ARRAY_SIZE(parent->comps); i++) {
comp = hda_component_from_index(parent, i);
support_notifications = support_notifications ||
comp->acpi_notifications_supported;
}
if (support_notifications) {
ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
handler, data);
if (ret < 0) {
codec_warn(cdc, "Failed to install notify handler: %d\n", ret);
return 0;
}
codec_dbg(cdc, "Notify handler installed\n");
}
return 0;
}
EXPORT_SYMBOL_NS_GPL(hda_component_manager_bind_acpi_notifications, SND_HDA_SCODEC_COMPONENT);
void hda_component_manager_unbind_acpi_notifications(struct hda_codec *cdc,
struct hda_component_parent *parent,
acpi_notify_handler handler)
{
struct acpi_device *adev;
int ret;
adev = parent->comps[0].adev;
if (!acpi_device_handle(adev))
return;
ret = acpi_remove_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, handler);
if (ret < 0)
codec_warn(cdc, "Failed to uninstall notify handler: %d\n", ret);
}
EXPORT_SYMBOL_NS_GPL(hda_component_manager_unbind_acpi_notifications, SND_HDA_SCODEC_COMPONENT);
#endif /* ifdef CONFIG_ACPI */
void hda_component_manager_playback_hook(struct hda_component_parent *parent, int action)
{
struct hda_component *comp;
int i;
mutex_lock(&parent->mutex);
for (i = 0; i < ARRAY_SIZE(parent->comps); i++) {
comp = hda_component_from_index(parent, i);
if (comp->dev && comp->pre_playback_hook)
comp->pre_playback_hook(comp->dev, action);
}
for (i = 0; i < ARRAY_SIZE(parent->comps); i++) {
comp = hda_component_from_index(parent, i);
if (comp->dev && comp->playback_hook)
comp->playback_hook(comp->dev, action);
}
for (i = 0; i < ARRAY_SIZE(parent->comps); i++) {
comp = hda_component_from_index(parent, i);
if (comp->dev && comp->post_playback_hook)
comp->post_playback_hook(comp->dev, action);
}
mutex_unlock(&parent->mutex);
}
EXPORT_SYMBOL_NS_GPL(hda_component_manager_playback_hook, SND_HDA_SCODEC_COMPONENT);
struct hda_scodec_match {
const char *bus;
const char *hid;
const char *match_str;
int index;
};
/* match the device name in a slightly relaxed manner */
static int hda_comp_match_dev_name(struct device *dev, void *data)
{
struct hda_scodec_match *p = data;
const char *d = dev_name(dev);
int n = strlen(p->bus);
char tmp[32];
/* check the bus name */
if (strncmp(d, p->bus, n))
return 0;
/* skip the bus number */
if (isdigit(d[n]))
n++;
/* the rest must be exact matching */
snprintf(tmp, sizeof(tmp), p->match_str, p->hid, p->index);
return !strcmp(d + n, tmp);
}
int hda_component_manager_bind(struct hda_codec *cdc,
struct hda_component_parent *parent)
{
int ret;
/* Init shared and component specific data */
memset(parent->comps, 0, sizeof(parent->comps));
mutex_lock(&parent->mutex);
ret = component_bind_all(hda_codec_dev(cdc), parent);
mutex_unlock(&parent->mutex);
return ret;
}
EXPORT_SYMBOL_NS_GPL(hda_component_manager_bind, SND_HDA_SCODEC_COMPONENT);
int hda_component_manager_init(struct hda_codec *cdc,
struct hda_component_parent *parent, int count,
const char *bus, const char *hid,
const char *match_str,
const struct component_master_ops *ops)
{
struct device *dev = hda_codec_dev(cdc);
struct component_match *match = NULL;
struct hda_scodec_match *sm;
int ret, i;
if (parent->codec) {
codec_err(cdc, "Component binding already created (SSID: %x)\n",
cdc->core.subsystem_id);
return -EINVAL;
}
parent->codec = cdc;
mutex_init(&parent->mutex);
for (i = 0; i < count; i++) {
sm = devm_kmalloc(dev, sizeof(*sm), GFP_KERNEL);
if (!sm)
return -ENOMEM;
sm->bus = bus;
sm->hid = hid;
sm->match_str = match_str;
sm->index = i;
component_match_add(dev, &match, hda_comp_match_dev_name, sm);
}
ret = component_master_add_with_match(dev, ops, match);
if (ret)
codec_err(cdc, "Fail to register component aggregator %d\n", ret);
return ret;
}
EXPORT_SYMBOL_NS_GPL(hda_component_manager_init, SND_HDA_SCODEC_COMPONENT);
void hda_component_manager_free(struct hda_component_parent *parent,
const struct component_master_ops *ops)
{
struct device *dev;
if (!parent->codec)
return;
dev = hda_codec_dev(parent->codec);
component_master_del(dev, ops);
parent->codec = NULL;
}
EXPORT_SYMBOL_NS_GPL(hda_component_manager_free, SND_HDA_SCODEC_COMPONENT);
MODULE_DESCRIPTION("HD Audio component binding library");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL");
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