1 #include <sound/driver.h>
2 #include <sound/core.h>
3 #include <sound/info.h>
4 #include <sound/control.h>
5 #include <sound/ac97_codec.h>
8 #include "cs5535audio.h"
11 * OLPC has an additional feature on top of the regular AD1888 codec features.
12 * It has an Analog Input mode that is switched into (after disabling the
13 * High Pass Filter) via GPIO. It is supported on B2 and later models.
15 void olpc_analog_input(struct snd_ac97 *ac97, int on)
19 /* update the High Pass Filter (via AC97_AD_TEST2) */
20 err = snd_ac97_update_bits(ac97, AC97_AD_TEST2,
21 1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT);
23 snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err);
27 /* set Analog Input through GPIO */
29 geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
31 geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL);
35 * OLPC XO-1's V_REFOUT is a mic bias enable.
37 void olpc_mic_bias(struct snd_ac97 *ac97, int on)
42 err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
43 1 << AC97_AD_VREFD_SHIFT, on << AC97_AD_VREFD_SHIFT);
45 snd_printk(KERN_ERR "setting MIC Bias - %d\n", err);
48 static int olpc_dc_info(struct snd_kcontrol *kctl,
49 struct snd_ctl_elem_info *uinfo)
51 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
53 uinfo->value.integer.min = 0;
54 uinfo->value.integer.max = 1;
58 static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
60 v->value.integer.value[0] = geode_gpio_isset(OLPC_GPIO_MIC_AC,
65 static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
67 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
69 olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
73 static int olpc_mic_info(struct snd_kcontrol *kctl,
74 struct snd_ctl_elem_info *uinfo)
76 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
78 uinfo->value.integer.min = 0;
79 uinfo->value.integer.max = 1;
83 static int olpc_mic_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
85 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
86 struct snd_ac97 *ac97 = cs5535au->ac97;
89 i = (snd_ac97_read(ac97, AC97_AD_MISC) >> AC97_AD_VREFD_SHIFT) & 0x1;
90 v->value.integer.value[0] = i ? 0 : 1;
94 static int olpc_mic_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
96 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
98 olpc_mic_bias(cs5535au->ac97, v->value.integer.value[0]);
102 static struct snd_kcontrol_new olpc_cs5535audio_ctls[] __devinitdata = {
104 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
105 .name = "DC Mode Enable",
106 .info = olpc_dc_info,
112 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
113 .name = "MIC Bias Enable",
114 .info = olpc_mic_info,
121 void __devinit olpc_prequirks(struct snd_card *card,
122 struct snd_ac97_template *ac97)
124 if (!machine_is_olpc())
127 /* invert EAPD if on an OLPC B3 or higher */
128 if (olpc_board_at_least(olpc_board_pre(0xb3)))
129 ac97->scaps |= AC97_SCAP_INV_EAPD;
132 int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
134 struct snd_ctl_elem_id elem;
137 if (!machine_is_olpc())
140 /* drop the original AD1888 HPF control */
141 memset(&elem, 0, sizeof(elem));
142 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
143 strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
144 snd_ctl_remove_id(card, &elem);
146 /* drop the original V_REFOUT control */
147 memset(&elem, 0, sizeof(elem));
148 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
149 strncpy(elem.name, "V_REFOUT Enable", sizeof(elem.name));
150 snd_ctl_remove_id(card, &elem);
152 /* add the OLPC-specific controls */
153 for (i = 0; i < ARRAY_SIZE(olpc_cs5535audio_ctls); i++) {
154 err = snd_ctl_add(card, snd_ctl_new1(&olpc_cs5535audio_ctls[i],
155 ac97->private_data));