1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <sound/info.h>
7 struct usb_mixer_interface {
8 struct snd_usb_audio *chip;
9 struct usb_host_interface *hostif;
10 struct list_head list;
11 unsigned int ignore_ctl_error;
13 /* array[MAX_ID_ELEMS], indexed by unit id */
14 struct usb_mixer_elem_list **id_elems;
16 /* the usb audio specification version this interface complies to */
19 /* Sound Blaster remote control stuff */
20 const struct rc_config *rc_cfg;
22 wait_queue_head_t rc_waitq;
24 struct usb_ctrlrequest *rc_setup_packet;
30 #define MAX_CHANNELS 16 /* max logical channels */
34 USB_MIXER_INV_BOOLEAN,
43 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
44 struct usb_mixer_elem_list *list);
45 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
47 struct usb_mixer_elem_list {
48 struct usb_mixer_interface *mixer;
49 struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
50 struct snd_kcontrol *kctl;
52 usb_mixer_elem_dump_func_t dump;
53 usb_mixer_elem_resume_func_t resume;
56 /* iterate over mixer element list of the given unit id */
57 #define for_each_mixer_elem(list, mixer, id) \
58 for ((list) = (mixer)->id_elems[id]; (list); (list) = (list)->next_id_elem)
59 #define mixer_elem_list_to_info(list) \
60 container_of(list, struct usb_mixer_elem_info, head)
62 struct usb_mixer_elem_info {
63 struct usb_mixer_elem_list head;
64 unsigned int control; /* CS or ICN (high byte) */
65 unsigned int cmask; /* channel mask bitmap: 0 = master */
66 unsigned int idx_off; /* Control index offset */
67 unsigned int ch_readonly;
68 unsigned int master_readonly;
74 int cache_val[MAX_CHANNELS];
80 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
82 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
84 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
86 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
87 int request, int validx, int value_set);
89 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
90 struct snd_kcontrol *kctl);
92 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
93 struct usb_mixer_interface *mixer,
96 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
97 unsigned int size, unsigned int __user *_tlv);
100 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
101 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
104 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
105 int index, int value);
107 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
108 int channel, int index, int *value);
110 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
112 extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
114 #endif /* __USBMIXER_H */