blob: 797d3a6687ebf7557308fd5a1d14201a230e8dbe [file] [log] [blame]
Jochen Vossfeaa6a72006-10-04 18:08:43 +02001/*
2 * ALSA Driver for the PT2258 volume controller.
3 *
4 * Copyright (c) 2006 Jochen Voss <voss@seehuhn.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
Jochen Vossfeaa6a72006-10-04 18:08:43 +020022#include <sound/core.h>
23#include <sound/control.h>
24#include <sound/tlv.h>
25#include <sound/i2c.h>
26#include <sound/pt2258.h>
27
28MODULE_AUTHOR("Jochen Voss <voss@seehuhn.de>");
29MODULE_DESCRIPTION("PT2258 volume controller (Princeton Technology Corp.)");
30MODULE_LICENSE("GPL");
31
32#define PT2258_CMD_RESET 0xc0
33#define PT2258_CMD_UNMUTE 0xf8
34#define PT2258_CMD_MUTE 0xf9
35
36static const unsigned char pt2258_channel_code[12] = {
37 0x80, 0x90, /* channel 1: -10dB, -1dB */
38 0x40, 0x50, /* channel 2: -10dB, -1dB */
39 0x00, 0x10, /* channel 3: -10dB, -1dB */
40 0x20, 0x30, /* channel 4: -10dB, -1dB */
41 0x60, 0x70, /* channel 5: -10dB, -1dB */
42 0xa0, 0xb0 /* channel 6: -10dB, -1dB */
43};
44
45int snd_pt2258_reset(struct snd_pt2258 *pt)
46{
47 unsigned char bytes[2];
48 int i;
49
50 /* reset chip */
51 bytes[0] = PT2258_CMD_RESET;
52 snd_i2c_lock(pt->i2c_bus);
53 if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
54 goto __error;
55 snd_i2c_unlock(pt->i2c_bus);
56
57 /* mute all channels */
58 pt->mute = 1;
59 bytes[0] = PT2258_CMD_MUTE;
60 snd_i2c_lock(pt->i2c_bus);
61 if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
62 goto __error;
63 snd_i2c_unlock(pt->i2c_bus);
64
65 /* set all channels to 0dB */
66 for (i = 0; i < 6; ++i)
67 pt->volume[i] = 0;
68 bytes[0] = 0xd0;
69 bytes[1] = 0xe0;
70 snd_i2c_lock(pt->i2c_bus);
71 if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
72 goto __error;
73 snd_i2c_unlock(pt->i2c_bus);
74
75 return 0;
76
77 __error:
78 snd_i2c_unlock(pt->i2c_bus);
79 snd_printk(KERN_ERR "PT2258 reset failed\n");
80 return -EIO;
81}
82
83static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol,
84 struct snd_ctl_elem_info *uinfo)
85{
86 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
87 uinfo->count = 2;
88 uinfo->value.integer.min = 0;
89 uinfo->value.integer.max = 79;
90 return 0;
91}
92
93static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol,
94 struct snd_ctl_elem_value *ucontrol)
95{
96 struct snd_pt2258 *pt = kcontrol->private_data;
97 int base = kcontrol->private_value;
98
99 /* chip does not support register reads */
100 ucontrol->value.integer.value[0] = 79 - pt->volume[base];
101 ucontrol->value.integer.value[1] = 79 - pt->volume[base + 1];
102 return 0;
103}
104
105static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol,
106 struct snd_ctl_elem_value *ucontrol)
107{
108 struct snd_pt2258 *pt = kcontrol->private_data;
109 int base = kcontrol->private_value;
110 unsigned char bytes[2];
111 int val0, val1;
112
113 val0 = 79 - ucontrol->value.integer.value[0];
114 val1 = 79 - ucontrol->value.integer.value[1];
Takashi Iwai3b892462007-11-15 16:17:24 +0100115 if (val0 < 0 || val0 > 79 || val1 < 0 || val1 > 79)
116 return -EINVAL;
Jochen Vossfeaa6a72006-10-04 18:08:43 +0200117 if (val0 == pt->volume[base] && val1 == pt->volume[base + 1])
118 return 0;
119
120 pt->volume[base] = val0;
121 bytes[0] = pt2258_channel_code[2 * base] | (val0 / 10);
122 bytes[1] = pt2258_channel_code[2 * base + 1] | (val0 % 10);
123 snd_i2c_lock(pt->i2c_bus);
124 if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
125 goto __error;
126 snd_i2c_unlock(pt->i2c_bus);
127
128 pt->volume[base + 1] = val1;
129 bytes[0] = pt2258_channel_code[2 * base + 2] | (val1 / 10);
130 bytes[1] = pt2258_channel_code[2 * base + 3] | (val1 % 10);
131 snd_i2c_lock(pt->i2c_bus);
132 if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
133 goto __error;
134 snd_i2c_unlock(pt->i2c_bus);
135
136 return 1;
137
138 __error:
139 snd_i2c_unlock(pt->i2c_bus);
140 snd_printk(KERN_ERR "PT2258 access failed\n");
141 return -EIO;
142}
143
Takashi Iwaia5ce8892007-07-23 15:42:26 +0200144#define pt2258_switch_info snd_ctl_boolean_mono_info
Jochen Vossfeaa6a72006-10-04 18:08:43 +0200145
146static int pt2258_switch_get(struct snd_kcontrol *kcontrol,
147 struct snd_ctl_elem_value *ucontrol)
148{
149 struct snd_pt2258 *pt = kcontrol->private_data;
150
151 ucontrol->value.integer.value[0] = !pt->mute;
152 return 0;
153}
154
155static int pt2258_switch_put(struct snd_kcontrol *kcontrol,
156 struct snd_ctl_elem_value *ucontrol)
157{
158 struct snd_pt2258 *pt = kcontrol->private_data;
159 unsigned char bytes[2];
160 int val;
161
162 val = !ucontrol->value.integer.value[0];
163 if (pt->mute == val)
164 return 0;
165
166 pt->mute = val;
167 bytes[0] = val ? PT2258_CMD_MUTE : PT2258_CMD_UNMUTE;
168 snd_i2c_lock(pt->i2c_bus);
169 if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
170 goto __error;
171 snd_i2c_unlock(pt->i2c_bus);
172
173 return 1;
174
175 __error:
176 snd_i2c_unlock(pt->i2c_bus);
177 snd_printk(KERN_ERR "PT2258 access failed 2\n");
178 return -EIO;
179}
180
Takashi Iwai0cb29ea2007-01-29 15:33:49 +0100181static const DECLARE_TLV_DB_SCALE(pt2258_db_scale, -7900, 100, 0);
Jochen Vossfeaa6a72006-10-04 18:08:43 +0200182
183int snd_pt2258_build_controls(struct snd_pt2258 *pt)
184{
185 struct snd_kcontrol_new knew;
186 char *names[3] = {
187 "Mic Loopback Playback Volume",
188 "Line Loopback Playback Volume",
189 "CD Loopback Playback Volume"
190 };
191 int i, err;
192
193 for (i = 0; i < 3; ++i) {
194 memset(&knew, 0, sizeof(knew));
195 knew.name = names[i];
196 knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
197 knew.count = 1;
198 knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
199 SNDRV_CTL_ELEM_ACCESS_TLV_READ;
200 knew.private_value = 2 * i;
201 knew.info = pt2258_stereo_volume_info;
202 knew.get = pt2258_stereo_volume_get;
203 knew.put = pt2258_stereo_volume_put;
204 knew.tlv.p = pt2258_db_scale;
205
206 err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
207 if (err < 0)
208 return err;
209 }
210
211 memset(&knew, 0, sizeof(knew));
212 knew.name = "Loopback Switch";
213 knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
214 knew.info = pt2258_switch_info;
215 knew.get = pt2258_switch_get;
216 knew.put = pt2258_switch_put;
217 knew.access = 0;
218 err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
219 if (err < 0)
220 return err;
221
222 return 0;
223}
224
225EXPORT_SYMBOL(snd_pt2258_reset);
226EXPORT_SYMBOL(snd_pt2258_build_controls);