1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __USBMIXER_H 3 #define __USBMIXER_H 4 5 #include <sound/info.h> 6 7 struct 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 32 enum { 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 43 typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer, 44 struct usb_mixer_elem_list *list); 45 typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem); 46 47 struct 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 struct usb_mixer_elem_info { 57 struct usb_mixer_elem_list head; 58 unsigned int control; /* CS or ICN (high byte) */ 59 unsigned int cmask; /* channel mask bitmap: 0 = master */ 60 unsigned int idx_off; /* Control index offset */ 61 unsigned int ch_readonly; 62 unsigned int master_readonly; 63 int channels; 64 int val_type; 65 int min, max, res; 66 int dBmin, dBmax; 67 int cached; 68 int cache_val[MAX_CHANNELS]; 69 u8 initialized; 70 u8 min_mute; 71 void *private_data; 72 }; 73 74 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, 75 int ignore_error); 76 void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer); 77 78 void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid); 79 80 int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, 81 int request, int validx, int value_set); 82 83 int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list, 84 struct snd_kcontrol *kctl); 85 86 void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, 87 struct usb_mixer_interface *mixer, 88 int unitid); 89 90 int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, 91 unsigned int size, unsigned int __user *_tlv); 92 93 #ifdef CONFIG_PM 94 int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer); 95 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume); 96 #endif 97 98 int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, 99 int index, int value); 100 101 int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, 102 int channel, int index, int *value); 103 104 extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl); 105 106 #endif /* __USBMIXER_H */ 107