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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __USBMIXER_H3#define __USBMIXER_H4 5#include <sound/info.h>6 7struct media_mixer_ctl;8 9struct usbmix_connector_map {10 u8 id;11 u8 delegated_id;12 u8 control;13 u8 channel;14};15 16struct usb_mixer_interface {17 struct snd_usb_audio *chip;18 struct usb_host_interface *hostif;19 struct list_head list;20 unsigned int ignore_ctl_error;21 struct urb *urb;22 /* array[MAX_ID_ELEMS], indexed by unit id */23 struct usb_mixer_elem_list **id_elems;24 25 /* the usb audio specification version this interface complies to */26 int protocol;27 28 /* optional connector delegation map */29 const struct usbmix_connector_map *connector_map;30 31 /* Sound Blaster remote control stuff */32 const struct rc_config *rc_cfg;33 u32 rc_code;34 wait_queue_head_t rc_waitq;35 struct urb *rc_urb;36 struct usb_ctrlrequest *rc_setup_packet;37 u8 rc_buffer[6];38 struct media_mixer_ctl *media_mixer_ctl;39 40 bool disconnected;41 42 void *private_data;43 void (*private_free)(struct usb_mixer_interface *mixer);44 void (*private_suspend)(struct usb_mixer_interface *mixer);45};46 47#define MAX_CHANNELS 16 /* max logical channels */48 49enum {50 USB_MIXER_BOOLEAN,51 USB_MIXER_INV_BOOLEAN,52 USB_MIXER_S8,53 USB_MIXER_U8,54 USB_MIXER_S16,55 USB_MIXER_U16,56 USB_MIXER_S32,57 USB_MIXER_U32,58 USB_MIXER_BESPOKEN, /* non-standard type */59};60 61typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,62 struct usb_mixer_elem_list *list);63typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);64 65struct usb_mixer_elem_list {66 struct usb_mixer_interface *mixer;67 struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */68 struct snd_kcontrol *kctl;69 unsigned int id;70 bool is_std_info;71 usb_mixer_elem_dump_func_t dump;72 usb_mixer_elem_resume_func_t resume;73};74 75/* iterate over mixer element list of the given unit id */76#define for_each_mixer_elem(list, mixer, id) \77 for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem)78#define mixer_elem_list_to_info(list) \79 container_of(list, struct usb_mixer_elem_info, head)80 81struct usb_mixer_elem_info {82 struct usb_mixer_elem_list head;83 unsigned int control; /* CS or ICN (high byte) */84 unsigned int cmask; /* channel mask bitmap: 0 = master */85 unsigned int idx_off; /* Control index offset */86 unsigned int ch_readonly;87 unsigned int master_readonly;88 int channels;89 int val_type;90 int min, max, res;91 int max_exposed; /* control API exposes the value in 0..max_exposed */92 int dBmin, dBmax;93 int cached;94 int cache_val[MAX_CHANNELS];95 u8 initialized;96 u8 min_mute;97 void *private_data;98};99 100int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif);101void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);102 103void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);104 105int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,106 int request, int validx, int value_set);107 108int snd_usb_mixer_add_list(struct usb_mixer_elem_list *list,109 struct snd_kcontrol *kctl,110 bool is_std_info);111 112#define snd_usb_mixer_add_control(list, kctl) \113 snd_usb_mixer_add_list(list, kctl, true)114 115void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,116 struct usb_mixer_interface *mixer,117 int unitid);118 119int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,120 unsigned int size, unsigned int __user *_tlv);121 122int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);123int snd_usb_mixer_resume(struct usb_mixer_interface *mixer);124 125int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,126 int index, int value);127 128int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,129 int channel, int index, int *value);130 131extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);132 133extern const struct snd_kcontrol_new *snd_usb_feature_unit_ctl;134 135#endif /* __USBMIXER_H */136