1 /*
2 * OLPC XO-1 additional sound features
3 *
4 * Copyright © 2006 Jaya Kumar <jayakumar.lkml@gmail.com>
5 * Copyright © 2007-2008 Andres Salomon <dilinger@debian.org>
6 *
7 * This program 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 #include <sound/core.h>
13 #include <sound/info.h>
14 #include <sound/control.h>
15 #include <sound/ac97_codec.h>
16
17 #include <asm/olpc.h>
18 #include "cs5535audio.h"
19
20 /*
21 * OLPC has an additional feature on top of the regular AD1888 codec features.
22 * It has an Analog Input mode that is switched into (after disabling the
23 * High Pass Filter) via GPIO. It is supported on B2 and later models.
24 */
25 void olpc_analog_input(struct snd_ac97 *ac97, int on)
26 {
27 int err;
28
29 if (!machine_is_olpc())
30 return;
31
32 /* update the High Pass Filter (via AC97_AD_TEST2) */
33 err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
34 1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
35 if (err < 0) {
36 snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err);
37 return;
38 }
39
40 /* set Analog Input through GPIO */
41 if (on)
42 geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
43 else
44 geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
45 }
46
47 /*
48 * OLPC XO-1's V_REFOUT is a mic bias enable.
49 */
50 void olpc_mic_bias(struct snd_ac97 *ac97, int on)
51 {
52 int err;
53
54 if (!machine_is_olpc())
55 return;
56
57 on = on ? 0 : 1;
58 err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
59 1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
60 if (err < 0)
61 snd_printk(KERN_ERR "setting MIC Bias - %d\n", err);
62 }
63
64 static int olpc_dc_info(struct snd_kcontrol *kctl,
65 struct snd_ctl_elem_info *uinfo)
66 {
67 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
68 uinfo->count = 1;
69 uinfo->value.integer.min = 0;
70 uinfo->value.integer.max = 1;
71 return 0;
72 }
73
74 static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
75 {
76 v->value.integer.value[0] = geode_gpio_isset(OLPC_GPIO_MIC_AC,
77 GPIO_OUTPUT_VAL);
78 return 0;
79 }
80
81 static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
82 {
83 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
84
85 olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
86 return 1;
87 }
88
89 static int olpc_mic_info(struct snd_kcontrol *kctl,
90 struct snd_ctl_elem_info *uinfo)
91 {
92 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
93 uinfo->count = 1;
94 uinfo->value.integer.min = 0;
95 uinfo->value.integer.max = 1;
96 return 0;
97 }
98
99 static int olpc_mic_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
100 {
101 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
102 struct snd_ac97 *ac97 = cs5535au->ac97;
103 int i;
104
105 i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
106 v->value.integer.value[0] = i ? 0 : 1;
107 return 0;
108 }
109
110 static int olpc_mic_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
111 {
112 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
113
114 olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]);
115 return 1;
116 }
117
118 static struct snd_kcontrol_new olpc_cs5535audio_ctls[] __devinitdata = {
119 {
120 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
121 .name = "DC Mode Enable",
122 .info = olpc_dc_info,
123 .get = olpc_dc_get,
124 .put = olpc_dc_put,
125 .private_value = 0,
126 },
127 {
128 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
129 .name = "MIC Bias Enable",
130 .info = olpc_mic_info,
131 .get = olpc_mic_get,
132 .put = olpc_mic_put,
133 .private_value = 0,
134 },
135 };
136
137 void __devinit olpc_prequirks(struct snd_card *card,
138 struct snd_ac97_template *ac97)
139 {
140 if (!machine_is_olpc())
141 return;
142
143 /* invert EAPD if on an OLPC B3 or higher */
144 if (olpc_board_at_least(olpc_board_pre(0xb3)))
145 ac97->scaps |= AC97_SCAP_INV_EAPD;
146 }
147
148 int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
149 {
150 struct snd_ctl_elem_id elem;
151 int i, err;
152
153 if (!machine_is_olpc())
154 return 0;
155
156 /* drop the original AD1888 HPF control */
157 memset(&elem, 0, sizeof(elem));
158 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
159 strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
160 snd_ctl_remove_id(card, &elem);
161
162 /* drop the original V_REFOUT control */
163 memset(&elem, 0, sizeof(elem));
164 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
165 strncpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
166 snd_ctl_remove_id(card, &elem);
167
168 /* add the OLPC-specific controls */
169 for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
170 err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
171 ac97->private_data));
172 if (err < 0)
173 return err;
174 }
175
176 /* turn off the mic by default */
177 olpc_mic_bias(ac97, 0);
178 return 0;
179 }
180
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