Commit | Line | Data |
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1cd2224c MR |
1 | /* |
2 | * Digital Beep Input Interface for HD-audio codec | |
3 | * | |
4 | * Author: Matthew Ranostay <mranostay@embeddedalley.com> | |
5 | * Copyright (c) 2008 Embedded Alley Solutions Inc | |
6 | * | |
7 | * This driver is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This driver is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/input.h> | |
23 | #include <linux/pci.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1cd2224c | 25 | #include <linux/workqueue.h> |
d81a6d71 | 26 | #include <linux/export.h> |
1cd2224c MR |
27 | #include <sound/core.h> |
28 | #include "hda_beep.h" | |
b7b51141 | 29 | #include "hda_local.h" |
1cd2224c MR |
30 | |
31 | enum { | |
32 | DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */ | |
33 | DIGBEEP_HZ_MIN = 93750, /* 93.750 Hz */ | |
34 | DIGBEEP_HZ_MAX = 12000000, /* 12 KHz */ | |
35 | }; | |
36 | ||
37 | static void snd_hda_generate_beep(struct work_struct *work) | |
38 | { | |
39 | struct hda_beep *beep = | |
40 | container_of(work, struct hda_beep, beep_work); | |
41 | struct hda_codec *codec = beep->codec; | |
e914b25e | 42 | int tone; |
1cd2224c | 43 | |
4d4e9bb3 TI |
44 | if (!beep->enabled) |
45 | return; | |
46 | ||
e914b25e TI |
47 | tone = beep->tone; |
48 | if (tone && !beep->playing) { | |
49 | snd_hda_power_up(codec); | |
50 | beep->playing = 1; | |
51 | } | |
1cd2224c | 52 | /* generate tone */ |
411fe85c | 53 | snd_hda_codec_write(codec, beep->nid, 0, |
e914b25e TI |
54 | AC_VERB_SET_BEEP_CONTROL, tone); |
55 | if (!tone && beep->playing) { | |
56 | beep->playing = 0; | |
57 | snd_hda_power_down(codec); | |
58 | } | |
1cd2224c MR |
59 | } |
60 | ||
fa797966 TI |
61 | /* (non-standard) Linear beep tone calculation for IDT/STAC codecs |
62 | * | |
63 | * The tone frequency of beep generator on IDT/STAC codecs is | |
64 | * defined from the 8bit tone parameter, in Hz, | |
65 | * freq = 48000 * (257 - tone) / 1024 | |
369693dc | 66 | * that is from 12kHz to 93.75Hz in steps of 46.875 Hz |
fa797966 TI |
67 | */ |
68 | static int beep_linear_tone(struct hda_beep *beep, int hz) | |
69 | { | |
369693dc PV |
70 | if (hz <= 0) |
71 | return 0; | |
fa797966 | 72 | hz *= 1000; /* fixed point */ |
369693dc PV |
73 | hz = hz - DIGBEEP_HZ_MIN |
74 | + DIGBEEP_HZ_STEP / 2; /* round to nearest step */ | |
fa797966 TI |
75 | if (hz < 0) |
76 | hz = 0; /* turn off PC beep*/ | |
77 | else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN)) | |
369693dc | 78 | hz = 1; /* max frequency */ |
fa797966 TI |
79 | else { |
80 | hz /= DIGBEEP_HZ_STEP; | |
369693dc | 81 | hz = 255 - hz; |
fa797966 TI |
82 | } |
83 | return hz; | |
84 | } | |
85 | ||
86 | /* HD-audio standard beep tone parameter calculation | |
87 | * | |
88 | * The tone frequency in Hz is calculated as | |
89 | * freq = 48000 / (tone * 4) | |
90 | * from 47Hz to 12kHz | |
91 | */ | |
92 | static int beep_standard_tone(struct hda_beep *beep, int hz) | |
93 | { | |
94 | if (hz <= 0) | |
95 | return 0; /* disabled */ | |
96 | hz = 12000 / hz; | |
97 | if (hz > 0xff) | |
98 | return 0xff; | |
99 | if (hz <= 0) | |
100 | return 1; | |
101 | return hz; | |
102 | } | |
103 | ||
1cd2224c MR |
104 | static int snd_hda_beep_event(struct input_dev *dev, unsigned int type, |
105 | unsigned int code, int hz) | |
106 | { | |
107 | struct hda_beep *beep = input_get_drvdata(dev); | |
108 | ||
109 | switch (code) { | |
110 | case SND_BELL: | |
111 | if (hz) | |
112 | hz = 1000; | |
113 | case SND_TONE: | |
fa797966 TI |
114 | if (beep->linear_tone) |
115 | beep->tone = beep_linear_tone(beep, hz); | |
116 | else | |
117 | beep->tone = beep_standard_tone(beep, hz); | |
1cd2224c MR |
118 | break; |
119 | default: | |
120 | return -1; | |
121 | } | |
1cd2224c MR |
122 | |
123 | /* schedule beep event */ | |
124 | schedule_work(&beep->beep_work); | |
125 | return 0; | |
126 | } | |
127 | ||
e914b25e TI |
128 | static void turn_off_beep(struct hda_beep *beep) |
129 | { | |
130 | cancel_work_sync(&beep->beep_work); | |
131 | if (beep->playing) { | |
132 | /* turn off beep */ | |
133 | snd_hda_codec_write(beep->codec, beep->nid, 0, | |
134 | AC_VERB_SET_BEEP_CONTROL, 0); | |
135 | beep->playing = 0; | |
136 | snd_hda_power_down(beep->codec); | |
137 | } | |
138 | } | |
139 | ||
123c07ae JK |
140 | static void snd_hda_do_detach(struct hda_beep *beep) |
141 | { | |
142 | input_unregister_device(beep->dev); | |
143 | beep->dev = NULL; | |
e914b25e | 144 | turn_off_beep(beep); |
123c07ae JK |
145 | } |
146 | ||
147 | static int snd_hda_do_attach(struct hda_beep *beep) | |
1cd2224c MR |
148 | { |
149 | struct input_dev *input_dev; | |
123c07ae | 150 | struct hda_codec *codec = beep->codec; |
1cd2224c MR |
151 | int err; |
152 | ||
1cd2224c | 153 | input_dev = input_allocate_device(); |
6a12afb5 | 154 | if (!input_dev) { |
123c07ae | 155 | printk(KERN_INFO "hda_beep: unable to allocate input device\n"); |
6a12afb5 TI |
156 | return -ENOMEM; |
157 | } | |
1cd2224c MR |
158 | |
159 | /* setup digital beep device */ | |
160 | input_dev->name = "HDA Digital PCBeep"; | |
161 | input_dev->phys = beep->phys; | |
162 | input_dev->id.bustype = BUS_PCI; | |
163 | ||
164 | input_dev->id.vendor = codec->vendor_id >> 16; | |
165 | input_dev->id.product = codec->vendor_id & 0xffff; | |
166 | input_dev->id.version = 0x01; | |
167 | ||
168 | input_dev->evbit[0] = BIT_MASK(EV_SND); | |
169 | input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); | |
170 | input_dev->event = snd_hda_beep_event; | |
171 | input_dev->dev.parent = &codec->bus->pci->dev; | |
172 | input_set_drvdata(input_dev, beep); | |
173 | ||
174 | err = input_register_device(input_dev); | |
175 | if (err < 0) { | |
f6154d6d | 176 | input_free_device(input_dev); |
123c07ae | 177 | printk(KERN_INFO "hda_beep: unable to register input device\n"); |
1cd2224c MR |
178 | return err; |
179 | } | |
123c07ae JK |
180 | beep->dev = input_dev; |
181 | return 0; | |
182 | } | |
183 | ||
123c07ae JK |
184 | int snd_hda_enable_beep_device(struct hda_codec *codec, int enable) |
185 | { | |
186 | struct hda_beep *beep = codec->beep; | |
3fd877d3 | 187 | if (!beep) |
13dab080 | 188 | return 0; |
3fd877d3 | 189 | enable = !!enable; |
13dab080 JK |
190 | if (beep->enabled != enable) { |
191 | beep->enabled = enable; | |
e914b25e TI |
192 | if (!enable) |
193 | turn_off_beep(beep); | |
123c07ae JK |
194 | return 1; |
195 | } | |
196 | return 0; | |
197 | } | |
198 | EXPORT_SYMBOL_HDA(snd_hda_enable_beep_device); | |
199 | ||
200 | int snd_hda_attach_beep_device(struct hda_codec *codec, int nid) | |
201 | { | |
202 | struct hda_beep *beep; | |
257dfb41 | 203 | int err; |
123c07ae JK |
204 | |
205 | if (!snd_hda_get_bool_hint(codec, "beep")) | |
9bb1fe39 TI |
206 | return 0; /* disabled explicitly by hints */ |
207 | if (codec->beep_mode == HDA_BEEP_MODE_OFF) | |
208 | return 0; /* disabled by module option */ | |
1cd2224c | 209 | |
123c07ae JK |
210 | beep = kzalloc(sizeof(*beep), GFP_KERNEL); |
211 | if (beep == NULL) | |
212 | return -ENOMEM; | |
213 | snprintf(beep->phys, sizeof(beep->phys), | |
214 | "card%d/codec#%d/beep0", codec->bus->card->number, codec->addr); | |
1cd2224c | 215 | /* enable linear scale */ |
8bc0a846 | 216 | snd_hda_codec_write_cache(codec, nid, 0, |
1cd2224c MR |
217 | AC_VERB_SET_DIGI_CONVERT_2, 0x01); |
218 | ||
219 | beep->nid = nid; | |
1cd2224c MR |
220 | beep->codec = codec; |
221 | codec->beep = beep; | |
222 | ||
223 | INIT_WORK(&beep->beep_work, &snd_hda_generate_beep); | |
123c07ae JK |
224 | mutex_init(&beep->mutex); |
225 | ||
257dfb41 TI |
226 | err = snd_hda_do_attach(beep); |
227 | if (err < 0) { | |
228 | kfree(beep); | |
229 | codec->beep = NULL; | |
230 | return err; | |
2dca0bba JK |
231 | } |
232 | ||
1cd2224c MR |
233 | return 0; |
234 | } | |
ff7a3267 | 235 | EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device); |
1cd2224c MR |
236 | |
237 | void snd_hda_detach_beep_device(struct hda_codec *codec) | |
238 | { | |
239 | struct hda_beep *beep = codec->beep; | |
240 | if (beep) { | |
54f7190b | 241 | if (beep->dev) |
123c07ae | 242 | snd_hda_do_detach(beep); |
c44765b8 | 243 | codec->beep = NULL; |
123c07ae | 244 | kfree(beep); |
1cd2224c MR |
245 | } |
246 | } | |
ff7a3267 | 247 | EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device); |
0401e854 | 248 | |
265d931a DH |
249 | static bool ctl_has_mute(struct snd_kcontrol *kcontrol) |
250 | { | |
251 | struct hda_codec *codec = snd_kcontrol_chip(kcontrol); | |
252 | return query_amp_caps(codec, get_amp_nid(kcontrol), | |
253 | get_amp_direction(kcontrol)) & AC_AMPCAP_MUTE; | |
254 | } | |
255 | ||
0401e854 TI |
256 | /* get/put callbacks for beep mute mixer switches */ |
257 | int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol, | |
258 | struct snd_ctl_elem_value *ucontrol) | |
259 | { | |
260 | struct hda_codec *codec = snd_kcontrol_chip(kcontrol); | |
261 | struct hda_beep *beep = codec->beep; | |
265d931a | 262 | if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) { |
0401e854 | 263 | ucontrol->value.integer.value[0] = |
265d931a | 264 | ucontrol->value.integer.value[1] = beep->enabled; |
0401e854 TI |
265 | return 0; |
266 | } | |
267 | return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol); | |
268 | } | |
269 | EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_get_beep); | |
270 | ||
271 | int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol, | |
272 | struct snd_ctl_elem_value *ucontrol) | |
273 | { | |
274 | struct hda_codec *codec = snd_kcontrol_chip(kcontrol); | |
275 | struct hda_beep *beep = codec->beep; | |
14bc9c6d DH |
276 | if (beep) { |
277 | u8 chs = get_amp_channels(kcontrol); | |
278 | int enable = 0; | |
279 | long *valp = ucontrol->value.integer.value; | |
280 | if (chs & 1) { | |
281 | enable |= *valp; | |
282 | valp++; | |
283 | } | |
284 | if (chs & 2) | |
285 | enable |= *valp; | |
286 | snd_hda_enable_beep_device(codec, enable); | |
287 | } | |
265d931a DH |
288 | if (!ctl_has_mute(kcontrol)) |
289 | return 0; | |
0401e854 TI |
290 | return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol); |
291 | } | |
292 | EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_put_beep); |