diff options
Diffstat (limited to 'target/linux/olpc/files/sound/pci')
-rw-r--r-- | target/linux/olpc/files/sound/pci/cs5535audio/cs5535audio_olpc.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/target/linux/olpc/files/sound/pci/cs5535audio/cs5535audio_olpc.c b/target/linux/olpc/files/sound/pci/cs5535audio/cs5535audio_olpc.c new file mode 100644 index 0000000000..791be73bfb --- /dev/null +++ b/target/linux/olpc/files/sound/pci/cs5535audio/cs5535audio_olpc.c @@ -0,0 +1,110 @@ +#include <sound/driver.h> +#include <sound/core.h> +#include <sound/info.h> +#include <sound/control.h> +#include <sound/ac97_codec.h> + +#include <asm/olpc.h> +#include "cs5535audio.h" + +/* + * OLPC has an additional feature on top of the regular AD1888 codec features. + * It has an Analog Input mode that is switched into (after disabling the + * High Pass Filter) via GPIO. It is only supported on B2 and later models. + */ + +int olpc_ai_enable(struct snd_ac97 *ac97, u8 val) +{ + int err; + + /* + * update the High Pass Filter (via AC97_AD_TEST2), and then set + * Analog Input mode through a GPIO. + */ + + if (val) { + err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, + 1<<AC97_AD_HPFD_SHIFT, 1<<AC97_AD_HPFD_SHIFT); + geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); + } + else { + err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, + 1<<AC97_AD_HPFD_SHIFT, 0); + geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); + } + if (err < 0) + snd_printk(KERN_ERR "Error updating AD_TEST2: %d\n", err); + + return err; +} +EXPORT_SYMBOL_GPL(olpc_ai_enable); + +static int snd_cs5535audio_ai_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + return 0; +} + +static int snd_cs5535audio_ai_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + ucontrol->value.integer.value[0] = geode_gpio_isset(OLPC_GPIO_MIC_AC, + GPIO_OUTPUT_VAL); + return 0; +} + +static int snd_cs5535audio_ai_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol); + struct snd_ac97 *ac97 = cs5535au->ac97; + + olpc_ai_enable(ac97, ucontrol->value.integer.value[0]); + + return 1; +} + +static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata = +{ + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "DC Mode Enable", + .info = snd_cs5535audio_ai_info, + .get = snd_cs5535audio_ai_get, + .put = snd_cs5535audio_ai_put, + .private_value = 0 +}; + +void __devinit olpc_prequirks(struct snd_card *card, + struct snd_ac97_template *ac97) +{ + /* Bail if this isn't an OLPC platform */ + if (!machine_is_olpc()) + return; + + /* If on an OLPC B3 or higher, invert EAPD. */ + if (olpc_rev_after(OLPC_REV_B2)) + ac97->scaps |= AC97_SCAP_INV_EAPD; +} + +int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97) +{ + struct snd_ctl_elem_id elem; + + /* Bail if this isn't an OLPC platform */ + if (!machine_is_olpc()) + return 0; + + /* drop the original ad1888 HPF control */ + memset(&elem, 0, sizeof(elem)); + elem.iface = SNDRV_CTL_ELEM_IFACE_MIXER; + strcpy(elem.name, "High Pass Filter Enable"); + snd_ctl_remove_id(card, &elem); + + /* add the override for OLPC's HPF */ + return snd_ctl_add(card, snd_ctl_new1(&snd_cs5535audio_controls, + ac97->private_data)); +} |