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feaa6a74 JV |
1 | /* |
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 | ||
22 | #include <sound/driver.h> | |
23 | #include <sound/core.h> | |
24 | #include <sound/control.h> | |
25 | #include <sound/tlv.h> | |
26 | #include <sound/i2c.h> | |
27 | #include <sound/pt2258.h> | |
28 | ||
29 | MODULE_AUTHOR("Jochen Voss <voss@seehuhn.de>"); | |
30 | MODULE_DESCRIPTION("PT2258 volume controller (Princeton Technology Corp.)"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | #define PT2258_CMD_RESET 0xc0 | |
34 | #define PT2258_CMD_UNMUTE 0xf8 | |
35 | #define PT2258_CMD_MUTE 0xf9 | |
36 | ||
37 | static const unsigned char pt2258_channel_code[12] = { | |
38 | 0x80, 0x90, /* channel 1: -10dB, -1dB */ | |
39 | 0x40, 0x50, /* channel 2: -10dB, -1dB */ | |
40 | 0x00, 0x10, /* channel 3: -10dB, -1dB */ | |
41 | 0x20, 0x30, /* channel 4: -10dB, -1dB */ | |
42 | 0x60, 0x70, /* channel 5: -10dB, -1dB */ | |
43 | 0xa0, 0xb0 /* channel 6: -10dB, -1dB */ | |
44 | }; | |
45 | ||
46 | int snd_pt2258_reset(struct snd_pt2258 *pt) | |
47 | { | |
48 | unsigned char bytes[2]; | |
49 | int i; | |
50 | ||
51 | /* reset chip */ | |
52 | bytes[0] = PT2258_CMD_RESET; | |
53 | snd_i2c_lock(pt->i2c_bus); | |
54 | if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1) | |
55 | goto __error; | |
56 | snd_i2c_unlock(pt->i2c_bus); | |
57 | ||
58 | /* mute all channels */ | |
59 | pt->mute = 1; | |
60 | bytes[0] = PT2258_CMD_MUTE; | |
61 | snd_i2c_lock(pt->i2c_bus); | |
62 | if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1) | |
63 | goto __error; | |
64 | snd_i2c_unlock(pt->i2c_bus); | |
65 | ||
66 | /* set all channels to 0dB */ | |
67 | for (i = 0; i < 6; ++i) | |
68 | pt->volume[i] = 0; | |
69 | bytes[0] = 0xd0; | |
70 | bytes[1] = 0xe0; | |
71 | snd_i2c_lock(pt->i2c_bus); | |
72 | if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2) | |
73 | goto __error; | |
74 | snd_i2c_unlock(pt->i2c_bus); | |
75 | ||
76 | return 0; | |
77 | ||
78 | __error: | |
79 | snd_i2c_unlock(pt->i2c_bus); | |
80 | snd_printk(KERN_ERR "PT2258 reset failed\n"); | |
81 | return -EIO; | |
82 | } | |
83 | ||
84 | static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol, | |
85 | struct snd_ctl_elem_info *uinfo) | |
86 | { | |
87 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
88 | uinfo->count = 2; | |
89 | uinfo->value.integer.min = 0; | |
90 | uinfo->value.integer.max = 79; | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol, | |
95 | struct snd_ctl_elem_value *ucontrol) | |
96 | { | |
97 | struct snd_pt2258 *pt = kcontrol->private_data; | |
98 | int base = kcontrol->private_value; | |
99 | ||
100 | /* chip does not support register reads */ | |
101 | ucontrol->value.integer.value[0] = 79 - pt->volume[base]; | |
102 | ucontrol->value.integer.value[1] = 79 - pt->volume[base + 1]; | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol, | |
107 | struct snd_ctl_elem_value *ucontrol) | |
108 | { | |
109 | struct snd_pt2258 *pt = kcontrol->private_data; | |
110 | int base = kcontrol->private_value; | |
111 | unsigned char bytes[2]; | |
112 | int val0, val1; | |
113 | ||
114 | val0 = 79 - ucontrol->value.integer.value[0]; | |
115 | val1 = 79 - ucontrol->value.integer.value[1]; | |
116 | if (val0 == pt->volume[base] && val1 == pt->volume[base + 1]) | |
117 | return 0; | |
118 | ||
119 | pt->volume[base] = val0; | |
120 | bytes[0] = pt2258_channel_code[2 * base] | (val0 / 10); | |
121 | bytes[1] = pt2258_channel_code[2 * base + 1] | (val0 % 10); | |
122 | snd_i2c_lock(pt->i2c_bus); | |
123 | if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2) | |
124 | goto __error; | |
125 | snd_i2c_unlock(pt->i2c_bus); | |
126 | ||
127 | pt->volume[base + 1] = val1; | |
128 | bytes[0] = pt2258_channel_code[2 * base + 2] | (val1 / 10); | |
129 | bytes[1] = pt2258_channel_code[2 * base + 3] | (val1 % 10); | |
130 | snd_i2c_lock(pt->i2c_bus); | |
131 | if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2) | |
132 | goto __error; | |
133 | snd_i2c_unlock(pt->i2c_bus); | |
134 | ||
135 | return 1; | |
136 | ||
137 | __error: | |
138 | snd_i2c_unlock(pt->i2c_bus); | |
139 | snd_printk(KERN_ERR "PT2258 access failed\n"); | |
140 | return -EIO; | |
141 | } | |
142 | ||
a5ce8890 | 143 | #define pt2258_switch_info snd_ctl_boolean_mono_info |
feaa6a74 JV |
144 | |
145 | static int pt2258_switch_get(struct snd_kcontrol *kcontrol, | |
146 | struct snd_ctl_elem_value *ucontrol) | |
147 | { | |
148 | struct snd_pt2258 *pt = kcontrol->private_data; | |
149 | ||
150 | ucontrol->value.integer.value[0] = !pt->mute; | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int pt2258_switch_put(struct snd_kcontrol *kcontrol, | |
155 | struct snd_ctl_elem_value *ucontrol) | |
156 | { | |
157 | struct snd_pt2258 *pt = kcontrol->private_data; | |
158 | unsigned char bytes[2]; | |
159 | int val; | |
160 | ||
161 | val = !ucontrol->value.integer.value[0]; | |
162 | if (pt->mute == val) | |
163 | return 0; | |
164 | ||
165 | pt->mute = val; | |
166 | bytes[0] = val ? PT2258_CMD_MUTE : PT2258_CMD_UNMUTE; | |
167 | snd_i2c_lock(pt->i2c_bus); | |
168 | if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1) | |
169 | goto __error; | |
170 | snd_i2c_unlock(pt->i2c_bus); | |
171 | ||
172 | return 1; | |
173 | ||
174 | __error: | |
175 | snd_i2c_unlock(pt->i2c_bus); | |
176 | snd_printk(KERN_ERR "PT2258 access failed 2\n"); | |
177 | return -EIO; | |
178 | } | |
179 | ||
0cb29ea0 | 180 | static const DECLARE_TLV_DB_SCALE(pt2258_db_scale, -7900, 100, 0); |
feaa6a74 JV |
181 | |
182 | int snd_pt2258_build_controls(struct snd_pt2258 *pt) | |
183 | { | |
184 | struct snd_kcontrol_new knew; | |
185 | char *names[3] = { | |
186 | "Mic Loopback Playback Volume", | |
187 | "Line Loopback Playback Volume", | |
188 | "CD Loopback Playback Volume" | |
189 | }; | |
190 | int i, err; | |
191 | ||
192 | for (i = 0; i < 3; ++i) { | |
193 | memset(&knew, 0, sizeof(knew)); | |
194 | knew.name = names[i]; | |
195 | knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER; | |
196 | knew.count = 1; | |
197 | knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | | |
198 | SNDRV_CTL_ELEM_ACCESS_TLV_READ; | |
199 | knew.private_value = 2 * i; | |
200 | knew.info = pt2258_stereo_volume_info; | |
201 | knew.get = pt2258_stereo_volume_get; | |
202 | knew.put = pt2258_stereo_volume_put; | |
203 | knew.tlv.p = pt2258_db_scale; | |
204 | ||
205 | err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt)); | |
206 | if (err < 0) | |
207 | return err; | |
208 | } | |
209 | ||
210 | memset(&knew, 0, sizeof(knew)); | |
211 | knew.name = "Loopback Switch"; | |
212 | knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER; | |
213 | knew.info = pt2258_switch_info; | |
214 | knew.get = pt2258_switch_get; | |
215 | knew.put = pt2258_switch_put; | |
216 | knew.access = 0; | |
217 | err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt)); | |
218 | if (err < 0) | |
219 | return err; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | EXPORT_SYMBOL(snd_pt2258_reset); | |
225 | EXPORT_SYMBOL(snd_pt2258_build_controls); |