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; | |
42 | ||
4d4e9bb3 TI |
43 | if (!beep->enabled) |
44 | return; | |
45 | ||
1cd2224c | 46 | /* generate tone */ |
411fe85c | 47 | snd_hda_codec_write(codec, beep->nid, 0, |
1cd2224c MR |
48 | AC_VERB_SET_BEEP_CONTROL, beep->tone); |
49 | } | |
50 | ||
fa797966 TI |
51 | /* (non-standard) Linear beep tone calculation for IDT/STAC codecs |
52 | * | |
53 | * The tone frequency of beep generator on IDT/STAC codecs is | |
54 | * defined from the 8bit tone parameter, in Hz, | |
55 | * freq = 48000 * (257 - tone) / 1024 | |
369693dc | 56 | * that is from 12kHz to 93.75Hz in steps of 46.875 Hz |
fa797966 TI |
57 | */ |
58 | static int beep_linear_tone(struct hda_beep *beep, int hz) | |
59 | { | |
369693dc PV |
60 | if (hz <= 0) |
61 | return 0; | |
fa797966 | 62 | hz *= 1000; /* fixed point */ |
369693dc PV |
63 | hz = hz - DIGBEEP_HZ_MIN |
64 | + DIGBEEP_HZ_STEP / 2; /* round to nearest step */ | |
fa797966 TI |
65 | if (hz < 0) |
66 | hz = 0; /* turn off PC beep*/ | |
67 | else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN)) | |
369693dc | 68 | hz = 1; /* max frequency */ |
fa797966 TI |
69 | else { |
70 | hz /= DIGBEEP_HZ_STEP; | |
369693dc | 71 | hz = 255 - hz; |
fa797966 TI |
72 | } |
73 | return hz; | |
74 | } | |
75 | ||
76 | /* HD-audio standard beep tone parameter calculation | |
77 | * | |
78 | * The tone frequency in Hz is calculated as | |
79 | * freq = 48000 / (tone * 4) | |
80 | * from 47Hz to 12kHz | |
81 | */ | |
82 | static int beep_standard_tone(struct hda_beep *beep, int hz) | |
83 | { | |
84 | if (hz <= 0) | |
85 | return 0; /* disabled */ | |
86 | hz = 12000 / hz; | |
87 | if (hz > 0xff) | |
88 | return 0xff; | |
89 | if (hz <= 0) | |
90 | return 1; | |
91 | return hz; | |
92 | } | |
93 | ||
1cd2224c MR |
94 | static int snd_hda_beep_event(struct input_dev *dev, unsigned int type, |
95 | unsigned int code, int hz) | |
96 | { | |
97 | struct hda_beep *beep = input_get_drvdata(dev); | |
98 | ||
99 | switch (code) { | |
100 | case SND_BELL: | |
101 | if (hz) | |
102 | hz = 1000; | |
103 | case SND_TONE: | |
fa797966 TI |
104 | if (beep->linear_tone) |
105 | beep->tone = beep_linear_tone(beep, hz); | |
106 | else | |
107 | beep->tone = beep_standard_tone(beep, hz); | |
1cd2224c MR |
108 | break; |
109 | default: | |
110 | return -1; | |
111 | } | |
1cd2224c MR |
112 | |
113 | /* schedule beep event */ | |
114 | schedule_work(&beep->beep_work); | |
115 | return 0; | |
116 | } | |
117 | ||
123c07ae JK |
118 | static void snd_hda_do_detach(struct hda_beep *beep) |
119 | { | |
120 | input_unregister_device(beep->dev); | |
121 | beep->dev = NULL; | |
122 | cancel_work_sync(&beep->beep_work); | |
123 | /* turn off beep for sure */ | |
411fe85c | 124 | snd_hda_codec_write(beep->codec, beep->nid, 0, |
123c07ae JK |
125 | AC_VERB_SET_BEEP_CONTROL, 0); |
126 | } | |
127 | ||
128 | static int snd_hda_do_attach(struct hda_beep *beep) | |
1cd2224c MR |
129 | { |
130 | struct input_dev *input_dev; | |
123c07ae | 131 | struct hda_codec *codec = beep->codec; |
1cd2224c MR |
132 | int err; |
133 | ||
1cd2224c | 134 | input_dev = input_allocate_device(); |
6a12afb5 | 135 | if (!input_dev) { |
123c07ae | 136 | printk(KERN_INFO "hda_beep: unable to allocate input device\n"); |
6a12afb5 TI |
137 | return -ENOMEM; |
138 | } | |
1cd2224c MR |
139 | |
140 | /* setup digital beep device */ | |
141 | input_dev->name = "HDA Digital PCBeep"; | |
142 | input_dev->phys = beep->phys; | |
143 | input_dev->id.bustype = BUS_PCI; | |
144 | ||
145 | input_dev->id.vendor = codec->vendor_id >> 16; | |
146 | input_dev->id.product = codec->vendor_id & 0xffff; | |
147 | input_dev->id.version = 0x01; | |
148 | ||
149 | input_dev->evbit[0] = BIT_MASK(EV_SND); | |
150 | input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); | |
151 | input_dev->event = snd_hda_beep_event; | |
152 | input_dev->dev.parent = &codec->bus->pci->dev; | |
153 | input_set_drvdata(input_dev, beep); | |
154 | ||
155 | err = input_register_device(input_dev); | |
156 | if (err < 0) { | |
f6154d6d | 157 | input_free_device(input_dev); |
123c07ae | 158 | printk(KERN_INFO "hda_beep: unable to register input device\n"); |
1cd2224c MR |
159 | return err; |
160 | } | |
123c07ae JK |
161 | beep->dev = input_dev; |
162 | return 0; | |
163 | } | |
164 | ||
123c07ae JK |
165 | int snd_hda_enable_beep_device(struct hda_codec *codec, int enable) |
166 | { | |
167 | struct hda_beep *beep = codec->beep; | |
168 | enable = !!enable; | |
13dab080 JK |
169 | if (beep == NULL) |
170 | return 0; | |
171 | if (beep->enabled != enable) { | |
172 | beep->enabled = enable; | |
2dca0bba | 173 | if (!enable) { |
13dab080 | 174 | /* turn off beep */ |
411fe85c | 175 | snd_hda_codec_write(beep->codec, beep->nid, 0, |
13dab080 | 176 | AC_VERB_SET_BEEP_CONTROL, 0); |
2dca0bba | 177 | } |
123c07ae JK |
178 | return 1; |
179 | } | |
180 | return 0; | |
181 | } | |
182 | EXPORT_SYMBOL_HDA(snd_hda_enable_beep_device); | |
183 | ||
184 | int snd_hda_attach_beep_device(struct hda_codec *codec, int nid) | |
185 | { | |
186 | struct hda_beep *beep; | |
257dfb41 | 187 | int err; |
123c07ae JK |
188 | |
189 | if (!snd_hda_get_bool_hint(codec, "beep")) | |
9bb1fe39 TI |
190 | return 0; /* disabled explicitly by hints */ |
191 | if (codec->beep_mode == HDA_BEEP_MODE_OFF) | |
192 | return 0; /* disabled by module option */ | |
1cd2224c | 193 | |
123c07ae JK |
194 | beep = kzalloc(sizeof(*beep), GFP_KERNEL); |
195 | if (beep == NULL) | |
196 | return -ENOMEM; | |
197 | snprintf(beep->phys, sizeof(beep->phys), | |
198 | "card%d/codec#%d/beep0", codec->bus->card->number, codec->addr); | |
1cd2224c MR |
199 | /* enable linear scale */ |
200 | snd_hda_codec_write(codec, nid, 0, | |
201 | AC_VERB_SET_DIGI_CONVERT_2, 0x01); | |
202 | ||
203 | beep->nid = nid; | |
1cd2224c MR |
204 | beep->codec = codec; |
205 | codec->beep = beep; | |
206 | ||
207 | INIT_WORK(&beep->beep_work, &snd_hda_generate_beep); | |
123c07ae JK |
208 | mutex_init(&beep->mutex); |
209 | ||
257dfb41 TI |
210 | err = snd_hda_do_attach(beep); |
211 | if (err < 0) { | |
212 | kfree(beep); | |
213 | codec->beep = NULL; | |
214 | return err; | |
2dca0bba JK |
215 | } |
216 | ||
1cd2224c MR |
217 | return 0; |
218 | } | |
ff7a3267 | 219 | EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device); |
1cd2224c MR |
220 | |
221 | void snd_hda_detach_beep_device(struct hda_codec *codec) | |
222 | { | |
223 | struct hda_beep *beep = codec->beep; | |
224 | if (beep) { | |
54f7190b | 225 | if (beep->dev) |
123c07ae | 226 | snd_hda_do_detach(beep); |
c44765b8 | 227 | codec->beep = NULL; |
123c07ae | 228 | kfree(beep); |
1cd2224c MR |
229 | } |
230 | } | |
ff7a3267 | 231 | EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device); |
0401e854 TI |
232 | |
233 | /* get/put callbacks for beep mute mixer switches */ | |
234 | int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol, | |
235 | struct snd_ctl_elem_value *ucontrol) | |
236 | { | |
237 | struct hda_codec *codec = snd_kcontrol_chip(kcontrol); | |
238 | struct hda_beep *beep = codec->beep; | |
239 | if (beep) { | |
240 | ucontrol->value.integer.value[0] = | |
241 | ucontrol->value.integer.value[1] = | |
242 | beep->enabled; | |
243 | return 0; | |
244 | } | |
245 | return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol); | |
246 | } | |
247 | EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_get_beep); | |
248 | ||
249 | int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol, | |
250 | struct snd_ctl_elem_value *ucontrol) | |
251 | { | |
252 | struct hda_codec *codec = snd_kcontrol_chip(kcontrol); | |
253 | struct hda_beep *beep = codec->beep; | |
254 | if (beep) | |
255 | snd_hda_enable_beep_device(codec, | |
256 | *ucontrol->value.integer.value); | |
257 | return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol); | |
258 | } | |
259 | EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_put_beep); |