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TOMOYO Linux Cross Reference
Linux/sound/usb/mixer.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __USBMIXER_H
  3 #define __USBMIXER_H
  4 
  5 #include <sound/info.h>
  6 
  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;
 12         struct urb *urb;
 13         /* array[MAX_ID_ELEMS], indexed by unit id */
 14         struct usb_mixer_elem_list **id_elems;
 15 
 16         /* the usb audio specification version this interface complies to */
 17         int protocol;
 18 
 19         /* Sound Blaster remote control stuff */
 20         const struct rc_config *rc_cfg;
 21         u32 rc_code;
 22         wait_queue_head_t rc_waitq;
 23         struct urb *rc_urb;
 24         struct usb_ctrlrequest *rc_setup_packet;
 25         u8 rc_buffer[6];
 26 
 27         bool disconnected;
 28 };
 29 
 30 #define MAX_CHANNELS    16      /* max logical channels */
 31 
 32 enum {
 33         USB_MIXER_BOOLEAN,
 34         USB_MIXER_INV_BOOLEAN,
 35         USB_MIXER_S8,
 36         USB_MIXER_U8,
 37         USB_MIXER_S16,
 38         USB_MIXER_U16,
 39         USB_MIXER_S32,
 40         USB_MIXER_U32,
 41 };
 42 
 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);
 46 
 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;
 51         unsigned int id;
 52         usb_mixer_elem_dump_func_t dump;
 53         usb_mixer_elem_resume_func_t resume;
 54 };
 55 
 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)
 61 
 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;
 69         int channels;
 70         int val_type;
 71         int min, max, res;
 72         int dBmin, dBmax;
 73         int cached;
 74         int cache_val[MAX_CHANNELS];
 75         u8 initialized;
 76         u8 min_mute;
 77         void *private_data;
 78 };
 79 
 80 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 81                          int ignore_error);
 82 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
 83 
 84 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
 85 
 86 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
 87                                 int request, int validx, int value_set);
 88 
 89 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
 90                               struct snd_kcontrol *kctl);
 91 
 92 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
 93                                  struct usb_mixer_interface *mixer,
 94                                  int unitid);
 95 
 96 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 97                           unsigned int size, unsigned int __user *_tlv);
 98 
 99 #ifdef CONFIG_PM
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);
102 #endif
103 
104 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
105                              int index, int value);
106 
107 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
108                              int channel, int index, int *value);
109 
110 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
111 
112 extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
113 
114 #endif /* __USBMIXER_H */
115 

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