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
96enum {
97 SND_CTL_SUBDEV_PCM,
98 SND_CTL_SUBDEV_RAWMIDI,
99 SND_CTL_SUBDEV_ITEMS,
100};
101
102struct snd_ctl_file {
103 struct list_head list;
104 struct snd_card *card;
105 struct pid *pid;
106 int preferred_subdevice[SND_CTL_SUBDEV_ITEMS];
107 wait_queue_head_t change_sleep;
108 spinlock_t read_lock;
109 struct fasync_struct *fasync;
110 int subscribed;
111 struct list_head events;
112};
113
114#define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)
115
116typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
117 struct snd_ctl_file * control,
118 unsigned int cmd, unsigned long arg);
119
120void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
121
122struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
123void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
124int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
125int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
126int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol, bool add_on_replace);
127int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
128int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
129int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
130 int active);
131struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
132struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);
133
134int snd_ctl_create(struct snd_card *card);
135
136int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
137int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
138#ifdef CONFIG_COMPAT
139int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
140int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
141#else
142#define snd_ctl_register_ioctl_compat(fcn)
143#define snd_ctl_unregister_ioctl_compat(fcn)
144#endif
145
146int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type);
147
148static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
149{
150 return id->numid - kctl->id.numid;
151}
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153static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
154{
155 return id->index - kctl->id.index;
156}
157
158static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
159{
160 if (id->numid) {
161 return snd_ctl_get_ioffnum(kctl, id);
162 } else {
163 return snd_ctl_get_ioffidx(kctl, id);
164 }
165}
166
167static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
168 struct snd_kcontrol *src_kctl,
169 unsigned int offset)
170{
171 *dst_id = src_kctl->id;
172 dst_id->index += offset;
173 dst_id->numid += offset;
174 return dst_id;
175}
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180int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
181 struct snd_ctl_elem_info *uinfo);
182int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
183 struct snd_ctl_elem_info *uinfo);
184int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
185 unsigned int items, const char *const names[]);
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190struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
191 const unsigned int *tlv);
192int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
193 unsigned int flags);
194
195#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
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216static inline int
217snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
218{
219 return _snd_ctl_add_slave(master, slave, 0);
220}
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238static inline int
239snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
240 struct snd_kcontrol *slave)
241{
242 return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
243}
244
245int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kctl,
246 void (*hook)(void *private_data, int),
247 void *private_data);
248void snd_ctl_sync_vmaster(struct snd_kcontrol *kctl, bool hook_only);
249#define snd_ctl_sync_vmaster_hook(kctl) snd_ctl_sync_vmaster(kctl, true)
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254struct snd_kcontrol *
255snd_kctl_jack_new(const char *name, struct snd_card *card);
256void snd_kctl_jack_report(struct snd_card *card,
257 struct snd_kcontrol *kctl, bool status);
258
259#endif
260