1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Digital Beep Input Interface for HD-audio codec
*
* Author: Matt Ranostay <matt.ranostay@konsulko.com>
* Copyright (c) 2008 Embedded Alley Solutions Inc
*/
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/export.h>
#include <sound/core.h>
#include "hda_beep.h"
#include "hda_local.h"
enum {
DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */
DIGBEEP_HZ_MIN = 93750, /* 93.750 Hz */
DIGBEEP_HZ_MAX = 12000000, /* 12 KHz */
};
/* generate or stop tone */
static void generate_tone(struct hda_beep *beep, int tone)
{
struct hda_codec *codec = beep->codec;
if (tone && !beep->playing) {
snd_hda_power_up(codec);
if (beep->power_hook)
beep->power_hook(beep, true);
beep->playing = 1;
}
snd_hda_codec_write(codec, beep->nid, 0,
AC_VERB_SET_BEEP_CONTROL, tone);
if (!tone && beep->playing) {
beep->playing = 0;
if (beep->power_hook)
beep->power_hook(beep, false);
snd_hda_power_down(codec);
}
}
static void snd_hda_generate_beep(struct work_struct *work)
{
struct hda_beep *beep =
container_of(work, struct hda_beep, beep_work);
if (beep->enabled)
generate_tone(beep, beep->tone);
}
/* (non-standard) Linear beep tone calculation for IDT/STAC codecs
*
* The tone frequency of beep generator on IDT/STAC codecs is
* defined from the 8bit tone parameter, in Hz,
* freq = 48000 * (257 - tone) / 1024
* that is from 12kHz to 93.75Hz in steps of 46.875 Hz
*/
static int beep_linear_tone(struct hda_beep *beep, int hz)
{
if (hz <= 0)
return 0;
hz *= 1000; /* fixed point */
hz = hz - DIGBEEP_HZ_MIN
+ DIGBEEP_HZ_STEP / 2; /* round to nearest step */
if (hz < 0)
hz = 0; /* turn off PC beep*/
else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
hz = 1; /* max frequency */
else {
hz /= DIGBEEP_HZ_STEP;
hz = 255 - hz;
}
return hz;
}
/* HD-audio standard beep tone parameter calculation
*
* The tone frequency in Hz is calculated as
* freq = 48000 / (tone * 4)
* from 47Hz to 12kHz
*/
static int beep_standard_tone(struct hda_beep *beep, int hz)
{
if (hz <= 0)
return 0; /* disabled */
hz = 12000 / hz;
if (hz > 0xff)
return 0xff;
if (hz <= 0)
return 1;
return hz;
}
static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
unsigned int code, int hz)
{
struct hda_beep *beep = input_get_drvdata(dev);
switch (code) {
case SND_BELL:
if (hz)
hz = 1000;
/* fallthru */
case SND_TONE:
if (beep->linear_tone)
beep->tone = beep_linear_tone(beep, hz);
else
beep->tone = beep_standard_tone(beep, hz);
break;
default:
return -1;
}
/* schedule beep event */
schedule_work(&beep->beep_work);
return 0;
}
static void turn_off_beep(struct hda_beep *beep)
{
cancel_work_sync(&beep->beep_work);
if (beep->playing) {
/* turn off beep */
generate_tone(beep, 0);
}
}
static void snd_hda_do_detach(struct hda_beep *beep)
{
if (beep->registered)
input_unregister_device(beep->dev);
else
input_free_device(beep->dev);
beep->dev = NULL;
turn_off_beep(beep);
}
static int snd_hda_do_attach(struct hda_beep *beep)
{
struct input_dev *input_dev;
struct hda_codec *codec = beep->codec;
input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
/* setup digital beep device */
input_dev->name = "HDA Digital PCBeep";
input_dev->phys = beep->phys;
input_dev->id.bustype = BUS_PCI;
input_dev->dev.parent = &codec->card->card_dev;
input_dev->id.vendor = codec->core.vendor_id >> 16;
input_dev->id.product = codec->core.vendor_id & 0xffff;
input_dev->id.version = 0x01;
input_dev->evbit[0] = BIT_MASK(EV_SND);
input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
input_dev->event = snd_hda_beep_event;
input_set_drvdata(input_dev, beep);
beep->dev = input_dev;
return 0;
}
/**
* snd_hda_enable_beep_device - Turn on/off beep sound
* @codec: the HDA codec
* @enable: flag to turn on/off
*/
int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
{
struct hda_beep *beep = codec->beep;
if (!beep)
return 0;
enable = !!enable;
if (beep->enabled != enable) {
beep->enabled = enable;
if (!enable)
turn_off_beep(beep);
return 1;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_enable_beep_device);
/**
* snd_hda_attach_beep_device - Attach a beep input device
* @codec: the HDA codec
* @nid: beep NID
*
* Attach a beep object to the given widget. If beep hint is turned off
* explicitly or beep_mode of the codec is turned off, this doesn't nothing.
*
* The attached beep device has to be registered via
* snd_hda_register_beep_device() and released via snd_hda_detach_beep_device()
* appropriately.
*
* Currently, only one beep device is allowed to each codec.
*/
int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
{
struct hda_beep *beep;
int err;
if (!snd_hda_get_bool_hint(codec, "beep"))
return 0; /* disabled explicitly by hints */
if (codec->beep_mode == HDA_BEEP_MODE_OFF)
return 0; /* disabled by module option */
beep = kzalloc(sizeof(*beep), GFP_KERNEL);
if (beep == NULL)
return -ENOMEM;
snprintf(beep->phys, sizeof(beep->phys),
"card%d/codec#%d/beep0", codec->card->number, codec->addr);
/* enable linear scale */
snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_DIGI_CONVERT_2, 0x01);
beep->nid = nid;
beep->codec = codec;
codec->beep = beep;
INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
mutex_init(&beep->mutex);
err = snd_hda_do_attach(beep);
if (err < 0) {
kfree(beep);
codec->beep = NULL;
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_attach_beep_device);
/**
* snd_hda_detach_beep_device - Detach the beep device
* @codec: the HDA codec
*/
void snd_hda_detach_beep_device(struct hda_codec *codec)
{
struct hda_beep *beep = codec->beep;
if (beep) {
if (beep->dev)
snd_hda_do_detach(beep);
codec->beep = NULL;
kfree(beep);
}
}
EXPORT_SYMBOL_GPL(snd_hda_detach_beep_device);
/**
* snd_hda_register_beep_device - Register the beep device
* @codec: the HDA codec
*/
int snd_hda_register_beep_device(struct hda_codec *codec)
{
struct hda_beep *beep = codec->beep;
int err;
if (!beep || !beep->dev)
return 0;
err = input_register_device(beep->dev);
if (err < 0) {
codec_err(codec, "hda_beep: unable to register input device\n");
input_free_device(beep->dev);
codec->beep = NULL;
kfree(beep);
return err;
}
beep->registered = true;
return 0;
}
EXPORT_SYMBOL_GPL(snd_hda_register_beep_device);
static bool ctl_has_mute(struct snd_kcontrol *kcontrol)
{
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
return query_amp_caps(codec, get_amp_nid(kcontrol),
get_amp_direction(kcontrol)) & AC_AMPCAP_MUTE;
}
/* get/put callbacks for beep mute mixer switches */
/**
* snd_hda_mixer_amp_switch_get_beep - Get callback for beep controls
* @kcontrol: ctl element
* @ucontrol: pointer to get/store the data
*/
int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
struct hda_beep *beep = codec->beep;
int chs = get_amp_channels(kcontrol);
if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) {
if (chs & 1)
ucontrol->value.integer.value[0] = beep->enabled;
if (chs & 2)
ucontrol->value.integer.value[1] = beep->enabled;
return 0;
}
return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol);
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_get_beep);
/**
* snd_hda_mixer_amp_switch_put_beep - Put callback for beep controls
* @kcontrol: ctl element
* @ucontrol: pointer to get/store the data
*/
int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
struct hda_beep *beep = codec->beep;
if (beep) {
u8 chs = get_amp_channels(kcontrol);
int enable = 0;
long *valp = ucontrol->value.integer.value;
if (chs & 1) {
enable |= *valp;
valp++;
}
if (chs & 2)
enable |= *valp;
snd_hda_enable_beep_device(codec, enable);
}
if (!ctl_has_mute(kcontrol))
return 0;
return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
}
EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_put_beep);
|
