1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <sound/info.h>
7 struct usbmix_connector_map {
14 struct usb_mixer_interface {
15 struct snd_usb_audio *chip;
16 struct usb_host_interface *hostif;
17 struct list_head list;
18 unsigned int ignore_ctl_error;
20 /* array[MAX_ID_ELEMS], indexed by unit id */
21 struct usb_mixer_elem_list **id_elems;
23 /* the usb audio specification version this interface complies to */
26 /* optional connector delegation map */
27 const struct usbmix_connector_map *connector_map;
29 /* Sound Blaster remote control stuff */
30 const struct rc_config *rc_cfg;
32 wait_queue_head_t rc_waitq;
34 struct usb_ctrlrequest *rc_setup_packet;
40 #define MAX_CHANNELS 16 /* max logical channels */
44 USB_MIXER_INV_BOOLEAN,
53 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
54 struct usb_mixer_elem_list *list);
55 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
57 struct usb_mixer_elem_list {
58 struct usb_mixer_interface *mixer;
59 struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
60 struct snd_kcontrol *kctl;
63 usb_mixer_elem_dump_func_t dump;
64 usb_mixer_elem_resume_func_t resume;
67 /* iterate over mixer element list of the given unit id */
68 #define for_each_mixer_elem(list, mixer, id) \
69 for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem)
70 #define mixer_elem_list_to_info(list) \
71 container_of(list, struct usb_mixer_elem_info, head)
73 struct usb_mixer_elem_info {
74 struct usb_mixer_elem_list head;
75 unsigned int control; /* CS or ICN (high byte) */
76 unsigned int cmask; /* channel mask bitmap: 0 = master */
77 unsigned int idx_off; /* Control index offset */
78 unsigned int ch_readonly;
79 unsigned int master_readonly;
85 int cache_val[MAX_CHANNELS];
91 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
93 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
95 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
97 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
98 int request, int validx, int value_set);
100 int snd_usb_mixer_add_list(struct usb_mixer_elem_list *list,
101 struct snd_kcontrol *kctl,
104 #define snd_usb_mixer_add_control(list, kctl) \
105 snd_usb_mixer_add_list(list, kctl, true)
107 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
108 struct usb_mixer_interface *mixer,
111 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
112 unsigned int size, unsigned int __user *_tlv);
115 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
116 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
119 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
120 int index, int value);
122 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
123 int channel, int index, int *value);
125 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
127 extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
129 #endif /* __USBMIXER_H */