1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <sound/info.h>
7 struct media_mixer_ctl;
9 struct usbmix_connector_map {
16 struct 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;
22 /* array[MAX_ID_ELEMS], indexed by unit id */
23 struct usb_mixer_elem_list **id_elems;
25 /* the usb audio specification version this interface complies to */
28 /* optional connector delegation map */
29 const struct usbmix_connector_map *connector_map;
31 /* Sound Blaster remote control stuff */
32 const struct rc_config *rc_cfg;
34 wait_queue_head_t rc_waitq;
36 struct usb_ctrlrequest *rc_setup_packet;
38 struct media_mixer_ctl *media_mixer_ctl;
43 void (*private_free)(struct usb_mixer_interface *mixer);
44 void (*private_suspend)(struct usb_mixer_interface *mixer);
47 #define MAX_CHANNELS 16 /* max logical channels */
51 USB_MIXER_INV_BOOLEAN,
60 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
61 struct usb_mixer_elem_list *list);
62 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
64 struct usb_mixer_elem_list {
65 struct usb_mixer_interface *mixer;
66 struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
67 struct snd_kcontrol *kctl;
69 usb_mixer_elem_dump_func_t dump;
70 usb_mixer_elem_resume_func_t resume;
73 /* iterate over mixer element list of the given unit id */
74 #define for_each_mixer_elem(list, mixer, id) \
75 for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem)
76 #define mixer_elem_list_to_info(list) \
77 container_of(list, struct usb_mixer_elem_info, head)
79 struct usb_mixer_elem_info {
80 struct usb_mixer_elem_list head;
81 unsigned int control; /* CS or ICN (high byte) */
82 unsigned int cmask; /* channel mask bitmap: 0 = master */
83 unsigned int idx_off; /* Control index offset */
84 unsigned int ch_readonly;
85 unsigned int master_readonly;
91 int cache_val[MAX_CHANNELS];
97 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
99 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
101 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
103 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
104 int request, int validx, int value_set);
106 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
107 struct snd_kcontrol *kctl);
109 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
110 struct usb_mixer_interface *mixer,
113 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
114 unsigned int size, unsigned int __user *_tlv);
117 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
118 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
121 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
122 int index, int value);
124 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
125 int channel, int index, int *value);
127 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
129 extern const struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
131 #endif /* __USBMIXER_H */