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