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

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  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         void *private_data;
 68 };
 69 
 70 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 71                          int ignore_error);
 72 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
 73 
 74 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
 75 
 76 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
 77                                 int request, int validx, int value_set);
 78 
 79 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
 80                               struct snd_kcontrol *kctl);
 81 
 82 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
 83                                  struct usb_mixer_interface *mixer,
 84                                  int unitid);
 85 
 86 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 87                           unsigned int size, unsigned int __user *_tlv);
 88 
 89 #ifdef CONFIG_PM
 90 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
 91 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
 92 #endif
 93 
 94 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
 95                              int index, int value);
 96 
 97 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
 98                              int channel, int index, int *value);
 99 
100 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
101 
102 #endif /* __USBMIXER_H */
103 

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