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 };
  37
  38 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
  39                                          struct usb_mixer_elem_list *list);
  40 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
  41
  42 struct usb_mixer_elem_list {
  43         struct usb_mixer_interface *mixer;
  44         struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
  45         struct snd_kcontrol *kctl;
  46         unsigned int id;
  47         usb_mixer_elem_dump_func_t dump;
  48         usb_mixer_elem_resume_func_t resume;
  49 };
  50
  51 struct usb_mixer_elem_info {
  52         struct usb_mixer_elem_list head;
  53         unsigned int control;   /* CS or ICN (high byte) */
  54         unsigned int cmask; /* channel mask bitmap: 0 = master */
  55         unsigned int idx_off; /* Control index offset */
  56         unsigned int ch_readonly;
  57         unsigned int master_readonly;
  58         int channels;
  59         int val_type;
  60         int min, max, res;
  61         int dBmin, dBmax;
  62         int cached;
  63         int cache_val[MAX_CHANNELS];
  64         u8 initialized;
  65         void *private_data;
  66 };
  67
  68 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  69                          int ignore_error);
  70 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
  71
  72 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  73
  74 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  75                                 int request, int validx, int value_set);
  76
  77 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
  78                               struct snd_kcontrol *kctl);
  79
  80 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
  81                                  struct usb_mixer_interface *mixer,
  82                                  int unitid);
  83
  84 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
  85                           unsigned int size, unsigned int __user *_tlv);
  86
  87 #ifdef CONFIG_PM
  88 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
  89 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
  90 #endif
  91
  92 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
  93                              int index, int value);
  94
  95 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
  96                              int channel, int index, int *value);
  97
  98 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
  99
 100 #endif /* __USBMIXER_H */