1#ifndef __SOUND_CONTROL_H
2#define __SOUND_CONTROL_H
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25#include <sound/asound.h>
26
27#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
28
29struct snd_kcontrol;
30typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);
31typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
32typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
33typedef int (snd_kcontrol_tlv_rw_t)(struct snd_kcontrol *kcontrol,
34 int op_flag,
35 unsigned int size,
36 unsigned int __user *tlv);
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38
39struct snd_kcontrol_new {
40 snd_ctl_elem_iface_t iface;
41 unsigned int device;
42 unsigned int subdevice;
43 unsigned char *name;
44 unsigned int index;
45 unsigned int access;
46 unsigned int count;
47 snd_kcontrol_info_t *info;
48 snd_kcontrol_get_t *get;
49 snd_kcontrol_put_t *put;
50 union {
51 snd_kcontrol_tlv_rw_t *c;
52 const unsigned int *p;
53 } tlv;
54 unsigned long private_value;
55};
56
57struct snd_kcontrol_volatile {
58 struct snd_ctl_file *owner;
59 unsigned int access;
60};
61
62struct snd_kcontrol {
63 struct list_head list;
64 struct snd_ctl_elem_id id;
65 unsigned int count;
66 snd_kcontrol_info_t *info;
67 snd_kcontrol_get_t *get;
68 snd_kcontrol_put_t *put;
69 union {
70 snd_kcontrol_tlv_rw_t *c;
71 const unsigned int *p;
72 } tlv;
73 unsigned long private_value;
74 void *private_data;
75 void (*private_free)(struct snd_kcontrol *kcontrol);
76 struct snd_kcontrol_volatile vd[0];
77};
78
79#define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list)
80
81struct snd_kctl_event {
82 struct list_head list;
83 struct snd_ctl_elem_id id;
84 unsigned int mask;
85};
86
87#define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)
88
89struct pid;
90
91struct snd_ctl_file {
92 struct list_head list;
93 struct snd_card *card;
94 struct pid *pid;
95 int prefer_pcm_subdevice;
96 int prefer_rawmidi_subdevice;
97 wait_queue_head_t change_sleep;
98 spinlock_t read_lock;
99 struct fasync_struct *fasync;
100 int subscribed;
101 struct list_head events;
102};
103
104#define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)
105
106typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
107 struct snd_ctl_file * control,
108 unsigned int cmd, unsigned long arg);
109
110void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
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112struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
113void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
114int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
115int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
116int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol, bool add_on_replace);
117int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
118int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
119int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
120 int active);
121struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
122struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);
123
124int snd_ctl_create(struct snd_card *card);
125
126int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
127int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
128#ifdef CONFIG_COMPAT
129int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
130int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
131#else
132#define snd_ctl_register_ioctl_compat(fcn)
133#define snd_ctl_unregister_ioctl_compat(fcn)
134#endif
135
136static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
137{
138 return id->numid - kctl->id.numid;
139}
140
141static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
142{
143 return id->index - kctl->id.index;
144}
145
146static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
147{
148 if (id->numid) {
149 return snd_ctl_get_ioffnum(kctl, id);
150 } else {
151 return snd_ctl_get_ioffidx(kctl, id);
152 }
153}
154
155static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
156 struct snd_kcontrol *src_kctl,
157 unsigned int offset)
158{
159 *dst_id = src_kctl->id;
160 dst_id->index += offset;
161 dst_id->numid += offset;
162 return dst_id;
163}
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168int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
169 struct snd_ctl_elem_info *uinfo);
170int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
171 struct snd_ctl_elem_info *uinfo);
172int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
173 unsigned int items, const char *const names[]);
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178struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
179 const unsigned int *tlv);
180int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
181 unsigned int flags);
182
183#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
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203static inline int
204snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
205{
206 return _snd_ctl_add_slave(master, slave, 0);
207}
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223static inline int
224snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
225 struct snd_kcontrol *slave)
226{
227 return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
228}
229
230#endif
231