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// SPDX-License-Identifier: GPL-2.0-only
/*
* hdac-ext-bus.c - HD-audio extended core bus functions.
*
* Copyright (C) 2014-2015 Intel Corp
* Author: Jeeja KP <jeeja.kp@intel.com>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <sound/hdaudio_ext.h>
MODULE_DESCRIPTION("HDA extended core");
MODULE_LICENSE("GPL v2");
/**
* snd_hdac_ext_bus_init - initialize a HD-audio extended bus
* @bus: the pointer to HDAC bus object
* @dev: device pointer
* @ops: bus verb operators
* @ext_ops: operators used for ASoC HDA codec drivers
*
* Returns 0 if successful, or a negative error code.
*/
int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev,
const struct hdac_bus_ops *ops,
const struct hdac_ext_bus_ops *ext_ops)
{
int ret;
ret = snd_hdac_bus_init(bus, dev, ops);
if (ret < 0)
return ret;
bus->ext_ops = ext_ops;
/* FIXME:
* Currently only one bus is supported, if there is device with more
* buses, bus->idx should be greater than 0, but there needs to be a
* reliable way to always assign same number.
*/
bus->idx = 0;
bus->cmd_dma_state = true;
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
/**
* snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
* @bus: the pointer to HDAC bus object
*/
void snd_hdac_ext_bus_exit(struct hdac_bus *bus)
{
snd_hdac_bus_exit(bus);
WARN_ON(!list_empty(&bus->hlink_list));
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
static void default_release(struct device *dev)
{
snd_hdac_ext_bus_device_exit(dev_to_hdac_dev(dev));
}
/**
* snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
* @bus: hdac bus to attach to
* @addr: codec address
* @hdev: hdac device to init
*
* Returns zero for success or a negative error code.
*/
int snd_hdac_ext_bus_device_init(struct hdac_bus *bus, int addr,
struct hdac_device *hdev)
{
char name[15];
int ret;
hdev->bus = bus;
snprintf(name, sizeof(name), "ehdaudio%dD%d", bus->idx, addr);
ret = snd_hdac_device_init(hdev, bus, name, addr);
if (ret < 0) {
dev_err(bus->dev, "device init failed for hdac device\n");
return ret;
}
hdev->type = HDA_DEV_ASOC;
hdev->dev.release = default_release;
ret = snd_hdac_device_register(hdev);
if (ret) {
dev_err(bus->dev, "failed to register hdac device\n");
snd_hdac_ext_bus_device_exit(hdev);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
/**
* snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device
* @hdev: hdac device to clean up
*/
void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
{
snd_hdac_device_exit(hdev);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
/**
* snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
*
* @bus: the pointer to HDAC bus object
*/
void snd_hdac_ext_bus_device_remove(struct hdac_bus *bus)
{
struct hdac_device *codec, *__codec;
/*
* we need to remove all the codec devices objects created in the
* snd_hdac_ext_bus_device_init
*/
list_for_each_entry_safe(codec, __codec, &bus->codec_list, list) {
snd_hdac_device_unregister(codec);
put_device(&codec->dev);
}
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
#define dev_to_hdac(dev) (container_of((dev), \
struct hdac_device, dev))
static inline struct hdac_driver *get_hdrv(struct device *dev)
{
struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
return hdrv;
}
static inline struct hdac_device *get_hdev(struct device *dev)
{
struct hdac_device *hdev = dev_to_hdac_dev(dev);
return hdev;
}
static int hda_ext_drv_probe(struct device *dev)
{
return (get_hdrv(dev))->probe(get_hdev(dev));
}
static int hdac_ext_drv_remove(struct device *dev)
{
return (get_hdrv(dev))->remove(get_hdev(dev));
}
static void hdac_ext_drv_shutdown(struct device *dev)
{
return (get_hdrv(dev))->shutdown(get_hdev(dev));
}
/**
* snd_hda_ext_driver_register - register a driver for ext hda devices
*
* @drv: ext hda driver structure
*/
int snd_hda_ext_driver_register(struct hdac_driver *drv)
{
drv->type = HDA_DEV_ASOC;
drv->driver.bus = &snd_hda_bus_type;
/* we use default match */
if (drv->probe)
drv->driver.probe = hda_ext_drv_probe;
if (drv->remove)
drv->driver.remove = hdac_ext_drv_remove;
if (drv->shutdown)
drv->driver.shutdown = hdac_ext_drv_shutdown;
return driver_register(&drv->driver);
}
EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);
/**
* snd_hda_ext_driver_unregister - unregister a driver for ext hda devices
*
* @drv: ext hda driver structure
*/
void snd_hda_ext_driver_unregister(struct hdac_driver *drv)
{
driver_unregister(&drv->driver);
}
EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);
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