sound/usb/mixer.h

   1 #ifndef __USBMIXER_H
   2 #define __USBMIXER_H
   3
   4 struct usb_mixer_interface {
   5         struct snd_usb_audio *chip;
   6         struct usb_host_interface *hostif;
   7         struct list_head list;
   8         unsigned int ignore_ctl_error;
   9         struct urb *urb;
  10         /* array[MAX_ID_ELEMS], indexed by unit id */
  11         struct usb_mixer_elem_info **id_elems;
  12
  13         /* the usb audio specification version this interface complies to */
  14         int protocol;
  15
  16         /* Sound Blaster remote control stuff */
  17         const struct rc_config *rc_cfg;
  18         u32 rc_code;
  19         wait_queue_head_t rc_waitq;
  20         struct urb *rc_urb;
  21         struct usb_ctrlrequest *rc_setup_packet;
  22         u8 rc_buffer[6];
  23
  24         u8 audigy2nx_leds[3];
  25         u8 xonar_u1_status;
  26 };
  27
  28 #define MAX_CHANNELS    16      /* max logical channels */
  29
  30 enum {
  31         USB_MIXER_BOOLEAN,
  32         USB_MIXER_INV_BOOLEAN,
  33         USB_MIXER_S8,
  34         USB_MIXER_U8,
  35         USB_MIXER_S16,
  36         USB_MIXER_U16,
  37 };
  38
  39 struct usb_mixer_elem_info {
  40         struct usb_mixer_interface *mixer;
  41         struct usb_mixer_elem_info *next_id_elem; /* list of controls with same id */
  42         struct snd_ctl_elem_id *elem_id;
  43         unsigned int id;
  44         unsigned int control;   /* CS or ICN (high byte) */
  45         unsigned int cmask; /* channel mask bitmap: 0 = master */
  46         unsigned int ch_readonly;
  47         unsigned int master_readonly;
  48         int channels;
  49         int val_type;
  50         int min, max, res;
  51         int dBmin, dBmax;
  52         int cached;
  53         int cache_val[MAX_CHANNELS];
  54         u8 initialized;
  55 };
  56
  57 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  58                          int ignore_error);
  59 void snd_usb_mixer_disconnect(struct list_head *p);
  60
  61 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  62
  63 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  64                                 int request, int validx, int value_set);
  65 void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
  66 int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
  67
  68 int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
  69                               struct snd_kcontrol *kctl);
  70
  71 #endif /* __USBMIXER_H */