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 void (*private_free)(struct usb_mixer_interface *mixer);
34 void (*private_suspend)(struct usb_mixer_interface *mixer);
37 #define MAX_CHANNELS 16 /* max logical channels */
41 USB_MIXER_INV_BOOLEAN,
50 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
51 struct usb_mixer_elem_list *list);
52 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
54 struct usb_mixer_elem_list {
55 struct usb_mixer_interface *mixer;
56 struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
57 struct snd_kcontrol *kctl;
59 usb_mixer_elem_dump_func_t dump;
60 usb_mixer_elem_resume_func_t resume;
63 /* iterate over mixer element list of the given unit id */
64 #define for_each_mixer_elem(list, mixer, id) \
65 for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem)
66 #define mixer_elem_list_to_info(list) \
67 container_of(list, struct usb_mixer_elem_info, head)
69 struct usb_mixer_elem_info {
70 struct usb_mixer_elem_list head;
71 unsigned int control; /* CS or ICN (high byte) */
72 unsigned int cmask; /* channel mask bitmap: 0 = master */
73 unsigned int idx_off; /* Control index offset */
74 unsigned int ch_readonly;
75 unsigned int master_readonly;
81 int cache_val[MAX_CHANNELS];
87 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
89 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
91 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
93 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
94 int request, int validx, int value_set);
96 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
97 struct snd_kcontrol *kctl);
99 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
100 struct usb_mixer_interface *mixer,
103 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
104 unsigned int size, unsigned int __user *_tlv);
107 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
108 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
111 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
112 int index, int value);
114 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
115 int channel, int index, int *value);
117 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
119 extern const struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
121 #endif /* __USBMIXER_H */