LXR linux/sound/usb/mixer.h

   1#ifndef __USBMIXER_H
   2#define __USBMIXER_H
   3
   4#include <sound/info.h>
   5
   6struct 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
  29enum {
  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
  40typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
  41                                         struct usb_mixer_elem_list *list);
  42typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
  43
  44struct 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
  53struct 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
  70int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  71                         int ignore_error);
  72void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
  73
  74void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  75
  76int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  77                                int request, int validx, int value_set);
  78
  79int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
  80                              struct snd_kcontrol *kctl);
  81
  82void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
  83                                 struct usb_mixer_interface *mixer,
  84                                 int unitid);
  85
  86int 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
  90int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
  91int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
  92#endif
  93
  94int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
  95                             int index, int value);
  96
  97int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
  98                             int channel, int index, int *value);
  99
 100extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
 101
 102#endif /* __USBMIXER_H */
 103