sound/usb/mixer.h

   1 #ifndef __USBMIXER_H
   2 #define __USBMIXER_H
   3
   4 #include <sound/info.h>
   5
   6 struct usb_mixer_interface {
   7         struct snd_usb_audio *chip;
   8         struct usb_host_interface *hostif;
   9         struct list_head list;
  10         unsigned int ignore_ctl_error;
  11         struct urb *urb;
  12         /* array[MAX_ID_ELEMS], indexed by unit id */
  13         struct usb_mixer_elem_list **id_elems;
  14
  15         /* the usb audio specification version this interface complies to */
  16         int protocol;
  17
  18         /* Sound Blaster remote control stuff */
  19         const struct rc_config *rc_cfg;
  20         u32 rc_code;
  21         wait_queue_head_t rc_waitq;
  22         struct urb *rc_urb;
  23         struct usb_ctrlrequest *rc_setup_packet;
  24         u8 rc_buffer[6];
  25 };
  26
  27 #define MAX_CHANNELS    16      /* max logical channels */
  28
  29 enum {
  30         USB_MIXER_BOOLEAN,
  31         USB_MIXER_INV_BOOLEAN,
  32         USB_MIXER_S8,
  33         USB_MIXER_U8,
  34         USB_MIXER_S16,
  35         USB_MIXER_U16,
  36         USB_MIXER_S32,
  37         USB_MIXER_U32,
  38 };
  39
  40 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
  41                                          struct usb_mixer_elem_list *list);
  42 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
  43
  44 struct usb_mixer_elem_list {
  45         struct usb_mixer_interface *mixer;
  46         struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
  47         struct snd_kcontrol *kctl;
  48         unsigned int id;
  49         usb_mixer_elem_dump_func_t dump;
  50         usb_mixer_elem_resume_func_t resume;
  51 };
  52
  53 struct usb_mixer_elem_info {
  54         struct usb_mixer_elem_list head;
  55         unsigned int control;   /* CS or ICN (high byte) */
  56         unsigned int cmask; /* channel mask bitmap: 0 = master */
  57         unsigned int idx_off; /* Control index offset */
  58         unsigned int ch_readonly;
  59         unsigned int master_readonly;
  60         int channels;
  61         int val_type;
  62         int min, max, res;
  63         int dBmin, dBmax;
  64         int cached;
  65         int cache_val[MAX_CHANNELS];
  66         u8 initialized;
  67         u8 min_mute;
  68         void *private_data;
  69 };
  70
  71 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  72                          int ignore_error);
  73 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
  74
  75 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  76
  77 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  78                                 int request, int validx, int value_set);
  79
  80 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
  81                               struct snd_kcontrol *kctl);
  82
  83 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
  84                                  struct usb_mixer_interface *mixer,
  85                                  int unitid);
  86
  87 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
  88                           unsigned int size, unsigned int __user *_tlv);
  89
  90 #ifdef CONFIG_PM
  91 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
  92 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
  93 #endif
  94
  95 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
  96                              int index, int value);
  97
  98 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
  99                              int channel, int index, int *value);
 100
 101 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
 102
 103 #endif /* __USBMIXER_H */