diff options
Diffstat (limited to 'include/sound/soc-usb.h')
| -rw-r--r-- | include/sound/soc-usb.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h new file mode 100644 index 000000000000..124acb1939e5 --- /dev/null +++ b/include/sound/soc-usb.h @@ -0,0 +1,138 @@ +/* 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 */ |