1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <sound/info.h>
7 struct media_mixer_ctl;
9 struct usb_mixer_interface {
10 struct snd_usb_audio *chip;
11 struct usb_host_interface *hostif;
12 struct list_head list;
13 unsigned int ignore_ctl_error;
15 /* array[MAX_ID_ELEMS], indexed by unit id */
16 struct usb_mixer_elem_list **id_elems;
18 /* the usb audio specification version this interface complies to */
21 /* Sound Blaster remote control stuff */
22 const struct rc_config *rc_cfg;
24 wait_queue_head_t rc_waitq;
26 struct usb_ctrlrequest *rc_setup_packet;
28 struct media_mixer_ctl *media_mixer_ctl;
33 #define MAX_CHANNELS 16 /* max logical channels */
37 USB_MIXER_INV_BOOLEAN,
46 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
47 struct usb_mixer_elem_list *list);
48 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
50 struct usb_mixer_elem_list {
51 struct usb_mixer_interface *mixer;
52 struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
53 struct snd_kcontrol *kctl;
55 usb_mixer_elem_dump_func_t dump;
56 usb_mixer_elem_resume_func_t resume;
59 /* iterate over mixer element list of the given unit id */
60 #define for_each_mixer_elem(list, mixer, id) \
61 for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem)
62 #define mixer_elem_list_to_info(list) \
63 container_of(list, struct usb_mixer_elem_info, head)
65 struct usb_mixer_elem_info {
66 struct usb_mixer_elem_list head;
67 unsigned int control; /* CS or ICN (high byte) */
68 unsigned int cmask; /* channel mask bitmap: 0 = master */
69 unsigned int idx_off; /* Control index offset */
70 unsigned int ch_readonly;
71 unsigned int master_readonly;
77 int cache_val[MAX_CHANNELS];
83 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
85 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
87 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
89 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
90 int request, int validx, int value_set);
92 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
93 struct snd_kcontrol *kctl);
95 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
96 struct usb_mixer_interface *mixer,
99 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
100 unsigned int size, unsigned int __user *_tlv);
103 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
104 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
107 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
108 int index, int value);
110 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
111 int channel, int index, int *value);
113 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
115 extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
117 #endif /* __USBMIXER_H */