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);
37
38enum {
39 SNDRV_CTL_TLV_OP_READ = 0,
40 SNDRV_CTL_TLV_OP_WRITE = 1,
41 SNDRV_CTL_TLV_OP_CMD = -1,
42};
43
44struct snd_kcontrol_new {
45 snd_ctl_elem_iface_t iface;
46 unsigned int device;
47 unsigned int subdevice;
48 const unsigned char *name;
49 unsigned int index;
50 unsigned int access;
51 unsigned int count;
52 snd_kcontrol_info_t *info;
53 snd_kcontrol_get_t *get;
54 snd_kcontrol_put_t *put;
55 union {
56 snd_kcontrol_tlv_rw_t *c;
57 const unsigned int *p;
58 } tlv;
59 unsigned long private_value;
60};
61
62struct snd_kcontrol_volatile {
63 struct snd_ctl_file *owner;
64 unsigned int access;
65};
66
67struct snd_kcontrol {
68 struct list_head list;
69 struct snd_ctl_elem_id id;
70 unsigned int count;
71 snd_kcontrol_info_t *info;
72 snd_kcontrol_get_t *get;
73 snd_kcontrol_put_t *put;
74 union {
75 snd_kcontrol_tlv_rw_t *c;
76 const unsigned int *p;
77 } tlv;
78 unsigned long private_value;
79 void *private_data;
80 void (*private_free)(struct snd_kcontrol *kcontrol);
81 struct snd_kcontrol_volatile vd[0];
82};
83
84#define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list)
85
86struct snd_kctl_event {
87 struct list_head list;
88 struct snd_ctl_elem_id id;
89 unsigned int mask;
90};
91
92#define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)
93
94struct pid;
95
96struct snd_ctl_file {
97 struct list_head list;
98 struct snd_card *card;
99 struct pid *pid;
100 int prefer_pcm_subdevice;
101 int prefer_rawmidi_subdevice;
102 wait_queue_head_t change_sleep;
103 spinlock_t read_lock;
104 struct fasync_struct *fasync;
105 int subscribed;
106 struct list_head events;
107};
108
109#define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)
110
111typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
112 struct snd_ctl_file * control,
113 unsigned int cmd, unsigned long arg);
114
115void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
116
117struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
118void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
119int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
120int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
121int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol, bool add_on_replace);
122int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
123int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
124int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
125 int active);
126struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
127struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);
128
129int snd_ctl_create(struct snd_card *card);
130
131int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
132int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
133#ifdef CONFIG_COMPAT
134int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
135int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
136#else
137#define snd_ctl_register_ioctl_compat(fcn)
138#define snd_ctl_unregister_ioctl_compat(fcn)
139#endif
140
141static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
142{
143 return id->numid - kctl->id.numid;
144}
145
146static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
147{
148 return id->index - kctl->id.index;
149}
150
151static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
152{
153 if (id->numid) {
154 return snd_ctl_get_ioffnum(kctl, id);
155 } else {
156 return snd_ctl_get_ioffidx(kctl, id);
157 }
158}
159
160static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
161 struct snd_kcontrol *src_kctl,
162 unsigned int offset)
163{
164 *dst_id = src_kctl->id;
165 dst_id->index += offset;
166 dst_id->numid += offset;
167 return dst_id;
168}
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173int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
174 struct snd_ctl_elem_info *uinfo);
175int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
176 struct snd_ctl_elem_info *uinfo);
177int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
178 unsigned int items, const char *const names[]);
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183struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
184 const unsigned int *tlv);
185int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
186 unsigned int flags);
187
188#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
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209static inline int
210snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
211{
212 return _snd_ctl_add_slave(master, slave, 0);
213}
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231static inline int
232snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
233 struct snd_kcontrol *slave)
234{
235 return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
236}
237
238int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kctl,
239 void (*hook)(void *private_data, int),
240 void *private_data);
241void snd_ctl_sync_vmaster(struct snd_kcontrol *kctl, bool hook_only);
242#define snd_ctl_sync_vmaster_hook(kctl) snd_ctl_sync_vmaster(kctl, true)
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247struct snd_kcontrol *
248snd_kctl_jack_new(const char *name, int idx, void *private_data);
249void snd_kctl_jack_report(struct snd_card *card,
250 struct snd_kcontrol *kctl, bool status);
251
252#endif
253