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         bool disconnected;
  27 };
  28
  29 #define MAX_CHANNELS    16      /* max logical channels */
  30
  31 enum {
  32         USB_MIXER_BOOLEAN,
  33         USB_MIXER_INV_BOOLEAN,
  34         USB_MIXER_S8,
  35         USB_MIXER_U8,
  36         USB_MIXER_S16,
  37         USB_MIXER_U16,
  38         USB_MIXER_S32,
  39         USB_MIXER_U32,
  40 };
  41
  42 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
  43                                          struct usb_mixer_elem_list *list);
  44 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
  45
  46 struct usb_mixer_elem_list {
  47         struct usb_mixer_interface *mixer;
  48         struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
  49         struct snd_kcontrol *kctl;
  50         unsigned int id;
  51         bool is_std_info;
  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_list(struct usb_mixer_elem_list *list,
  90                            struct snd_kcontrol *kctl,
  91                            bool is_std_info);
  92
  93 #define snd_usb_mixer_add_control(list, kctl) \
  94         snd_usb_mixer_add_list(list, kctl, true)
  95
  96 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
  97                                  struct usb_mixer_interface *mixer,
  98                                  int unitid);
  99
 100 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 101                           unsigned int size, unsigned int __user *_tlv);
 102
 103 #ifdef CONFIG_PM
 104 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
 105 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
 106 #endif
 107
 108 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
 109                              int index, int value);
 110
 111 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
 112                              int channel, int index, int *value);
 113
 114 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
 115
 116 #endif /* __USBMIXER_H */