LXR linux/sound/usb/mixer.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __USBMIXER_H
   3#define __USBMIXER_H
   4
   5#include <sound/info.h>
   6
   7struct usb_mixer_interface {
   8        struct snd_usb_audio *chip;
   9        struct usb_host_interface *hostif;
  10        struct list_head list;
  11        unsigned int ignore_ctl_error;
  12        struct urb *urb;
  13        /* array[MAX_ID_ELEMS], indexed by unit id */
  14        struct usb_mixer_elem_list **id_elems;
  15
  16        /* the usb audio specification version this interface complies to */
  17        int protocol;
  18
  19        /* Sound Blaster remote control stuff */
  20        const struct rc_config *rc_cfg;
  21        u32 rc_code;
  22        wait_queue_head_t rc_waitq;
  23        struct urb *rc_urb;
  24        struct usb_ctrlrequest *rc_setup_packet;
  25        u8 rc_buffer[6];
  26
  27        bool disconnected;
  28};
  29
  30#define MAX_CHANNELS    16      /* max logical channels */
  31
  32enum {
  33        USB_MIXER_BOOLEAN,
  34        USB_MIXER_INV_BOOLEAN,
  35        USB_MIXER_S8,
  36        USB_MIXER_U8,
  37        USB_MIXER_S16,
  38        USB_MIXER_U16,
  39        USB_MIXER_S32,
  40        USB_MIXER_U32,
  41};
  42
  43typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
  44                                         struct usb_mixer_elem_list *list);
  45typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
  46
  47struct usb_mixer_elem_list {
  48        struct usb_mixer_interface *mixer;
  49        struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
  50        struct snd_kcontrol *kctl;
  51        unsigned int id;
  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
  62struct 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
  80int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  81                         int ignore_error);
  82void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
  83
  84void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
  85
  86int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  87                                int request, int validx, int value_set);
  88
  89int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
  90                              struct snd_kcontrol *kctl);
  91
  92void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
  93                                 struct usb_mixer_interface *mixer,
  94                                 int unitid);
  95
  96int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
  97                          unsigned int size, unsigned int __user *_tlv);
  98
  99#ifdef CONFIG_PM
 100int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
 101int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
 102#endif
 103
 104int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
 105                             int index, int value);
 106
 107int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
 108                             int channel, int index, int *value);
 109
 110extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
 111
 112#endif /* __USBMIXER_H */
 113