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