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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (c) 2022-2025 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#ifndef __LINUX_SND_SOC_USB_H
#define __LINUX_SND_SOC_USB_H
#include <sound/soc.h>
enum snd_soc_usb_kctl {
SND_SOC_USB_KCTL_CARD_ROUTE,
SND_SOC_USB_KCTL_PCM_ROUTE,
};
/**
* struct snd_soc_usb_device - SoC USB representation of a USB sound device
* @card_idx: sound card index associated with USB device
* @chip_idx: USB sound chip array index
* @cpcm_idx: capture PCM index array associated with USB device
* @ppcm_idx: playback PCM index array associated with USB device
* @num_capture: number of capture streams
* @num_playback: number of playback streams
* @list: list head for SoC USB devices
**/
struct snd_soc_usb_device {
int card_idx;
int chip_idx;
/* PCM index arrays */
unsigned int *cpcm_idx; /* TODO: capture path is not tested yet */
unsigned int *ppcm_idx;
int num_capture; /* TODO: capture path is not tested yet */
int num_playback;
struct list_head list;
};
/**
* struct snd_soc_usb - representation of a SoC USB backend entity
* @list: list head for SND SOC struct list
* @component: reference to ASoC component
* @connection_status_cb: callback to notify connection events
* @update_offload_route_info: callback to fetch mapped ASoC card and pcm
* device pair. This is unrelated to the concept
* of DAPM route. The "route" argument carries
* an array used for a kcontrol output for either
* the card or pcm index. "path" determines the
* which entry to look for. (ie mapped card or pcm)
* @priv_data: driver data
**/
struct snd_soc_usb {
struct list_head list;
struct snd_soc_component *component;
int (*connection_status_cb)(struct snd_soc_usb *usb,
struct snd_soc_usb_device *sdev,
bool connected);
int (*update_offload_route_info)(struct snd_soc_component *component,
int card, int pcm, int direction,
enum snd_soc_usb_kctl path,
long *route);
void *priv_data;
};
#if IS_ENABLED(CONFIG_SND_SOC_USB)
int snd_soc_usb_find_supported_format(int card_idx,
struct snd_pcm_hw_params *params,
int direction);
int snd_soc_usb_connect(struct device *usbdev, struct snd_soc_usb_device *sdev);
int snd_soc_usb_disconnect(struct device *usbdev, struct snd_soc_usb_device *sdev);
void *snd_soc_usb_find_priv_data(struct device *usbdev);
int snd_soc_usb_setup_offload_jack(struct snd_soc_component *component,
struct snd_soc_jack *jack);
int snd_soc_usb_update_offload_route(struct device *dev, int card, int pcm,
int direction, enum snd_soc_usb_kctl path,
long *route);
struct snd_soc_usb *snd_soc_usb_allocate_port(struct snd_soc_component *component,
void *data);
void snd_soc_usb_free_port(struct snd_soc_usb *usb);
void snd_soc_usb_add_port(struct snd_soc_usb *usb);
void snd_soc_usb_remove_port(struct snd_soc_usb *usb);
#else
static inline int
snd_soc_usb_find_supported_format(int card_idx, struct snd_pcm_hw_params *params,
int direction)
{
return -EINVAL;
}
static inline int snd_soc_usb_connect(struct device *usbdev,
struct snd_soc_usb_device *sdev)
{
return -ENODEV;
}
static inline int snd_soc_usb_disconnect(struct device *usbdev,
struct snd_soc_usb_device *sdev)
{
return -EINVAL;
}
static inline void *snd_soc_usb_find_priv_data(struct device *usbdev)
{
return NULL;
}
static inline int snd_soc_usb_setup_offload_jack(struct snd_soc_component *component,
struct snd_soc_jack *jack)
{
return 0;
}
static int snd_soc_usb_update_offload_route(struct device *dev, int card, int pcm,
int direction, enum snd_soc_usb_kctl path,
long *route)
{
return -ENODEV;
}
static inline struct snd_soc_usb *
snd_soc_usb_allocate_port(struct snd_soc_component *component, void *data)
{
return ERR_PTR(-ENOMEM);
}
static inline void snd_soc_usb_free_port(struct snd_soc_usb *usb)
{ }
static inline void snd_soc_usb_add_port(struct snd_soc_usb *usb)
{ }
static inline void snd_soc_usb_remove_port(struct snd_soc_usb *usb)
{ }
#endif /* IS_ENABLED(CONFIG_SND_SOC_USB) */
#endif /*__LINUX_SND_SOC_USB_H */
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