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);
34 static int olpc_dc_info(struct snd_kcontrol *kctl,
35 struct snd_ctl_elem_info *uinfo)
37 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
39 uinfo->value.integer.min = 0;
40 uinfo->value.integer.max = 1;
44 static int olpc_dc_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
46 v->value.integer.value[0] = geode_gpio_isset(OLPC_GPIO_MIC_AC,
51 static int olpc_dc_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *v)
53 struct cs5535audio *cs5535au = snd_kcontrol_chip(kctl);
55 olpc_analog_input(cs5535au->ac97, v->value.integer.value[0]);
59 static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata =
61 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
62 .name = "DC Mode Enable",
69 void __devinit olpc_prequirks(struct snd_card *card,
70 struct snd_ac97_template *ac97)
72 if (!machine_is_olpc())
75 /* invert EAPD if on an OLPC B3 or higher */
76 if (olpc_board_at_least(olpc_board_pre(0xb3)))
77 ac97->scaps |= AC97_SCAP_INV_EAPD;
80 int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
82 struct snd_ctl_elem_id elem;
84 if (!machine_is_olpc())
87 /* drop the original AD1888 HPF control */
88 memset(&elem, 0, sizeof(elem));
89 elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
90 strncpy(elem.name, "High Pass Filter Enable", sizeof(elem.name));
91 snd_ctl_remove_id(card, &elem);
93 /* add the override for OLPC's HPF */
94 return snd_ctl_add(card, snd_ctl_new1(&snd_cs5535audio_controls,