| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | /* 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_control(struct usb_mixer_elem_list *list, |
| 90 | struct snd_kcontrol *kctl); |
| 91 | |
| 92 | void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list, |
| 93 | struct usb_mixer_interface *mixer, |
| 94 | int unitid); |
| 95 | |
| 96 | int 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 |
| 100 | int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer); |
| 101 | int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume); |
| 102 | #endif |
| 103 | |
| 104 | int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, |
| 105 | int index, int value); |
| 106 | |
| 107 | int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval, |
| 108 | int channel, int index, int *value); |
| 109 | |
| 110 | extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl); |
| 111 | |
| 112 | extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl; |
| 113 | |
| 114 | #endif /* __USBMIXER_H */ |