diff options
Diffstat (limited to 'sound/usb/mixer.h')
| -rw-r--r-- | sound/usb/mixer.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h new file mode 100644 index 000000000..6d20ba7ee --- /dev/null +++ b/sound/usb/mixer.h @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __USBMIXER_H +#define __USBMIXER_H + +#include <sound/info.h> + +struct media_mixer_ctl; + +struct usbmix_connector_map { + u8 id; + u8 delegated_id; + u8 control; + u8 channel; +}; + +struct usb_mixer_interface { + struct snd_usb_audio *chip; + struct usb_host_interface *hostif; + struct list_head list; + unsigned int ignore_ctl_error; + struct urb *urb; + /* array[MAX_ID_ELEMS], indexed by unit id */ + struct usb_mixer_elem_list **id_elems; + + /* the usb audio specification version this interface complies to */ + int protocol; + + /* optional connector delegation map */ + const struct usbmix_connector_map *connector_map; + + /* Sound Blaster remote control stuff */ + const struct rc_config *rc_cfg; + u32 rc_code; + wait_queue_head_t rc_waitq; + struct urb *rc_urb; + struct usb_ctrlrequest *rc_setup_packet; + u8 rc_buffer[6]; + struct media_mixer_ctl *media_mixer_ctl; + + bool disconnected; + + void *private_data; + void (*private_free)(struct usb_mixer_interface *mixer); + void (*private_suspend)(struct usb_mixer_interface *mixer); +}; + +#define MAX_CHANNELS 16 /* max logical channels */ + +enum { + USB_MIXER_BOOLEAN, + USB_MIXER_INV_BOOLEAN, + USB_MIXER_S8, + USB_MIXER_U8, + USB_MIXER_S16, + USB_MIXER_U16, + USB_MIXER_S32, + USB_MIXER_U32, + USB_MIXER_BESPOKEN, /* non-standard type */ +}; + +typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer, + struct usb_mixer_elem_list *list); +typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem); + +struct usb_mixer_elem_list { + struct usb_mixer_interface *mixer; + struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */ + struct snd_kcontrol *kctl; + unsigned int id; + bool is_std_info; + usb_mixer_elem_dump_func_t dump; + usb_mixer_elem_resume_func_t resume; +}; + +/* iterate over mixer element list of the given unit id */ +#define for_each_mixer_elem(list, mixer, id) \ + for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem) +#define mixer_elem_list_to_info(list) \ + container_of(list, struct usb_mixer_elem_info, head) + +struct usb_mixer_elem_info { + struct usb_mixer_elem_list head; + unsigned int control; /* CS or ICN (high byte) */ + unsigned int cmask; /* channel mask bitmap: 0 = master */ + unsigned int idx_off; /* Control index offset */ + unsigned int ch_readonly; + unsigned int master_readonly; + int channels; + int val_type; + int min, max, res; + int dBmin, dBmax; + int cached; + int cache_val[MAX_CHANNELS]; + u8 initialized; + u8 min_mute; + void *private_data; +}; + +int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, + int ignore_error); +void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer); + +void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid); + +int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, + int request, int validx, int value_set); + +int snd_usb_mixer_add_list(struct usb_mixer_elem_list *list, + struct snd_kcontrol *kctl, + bool is_std_info); + +#define snd_usb_mixer_add_control(list, kctl) \ + snd_usb_mixer_add_list(list, kctl, true) + +void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, + struct usb_mixer_interface *mixer, + int unitid); + +int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, + unsigned int size, unsigned int __user *_tlv); + +#ifdef CONFIG_PM +int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer); +int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume); +#endif + +int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, + int index, int value); + +int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, + int channel, int index, int *value); + +extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl); + +extern const struct snd_kcontrol_new *snd_usb_feature_unit_ctl; + +#endif /* __USBMIXER_H */ |