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author | Andres Salomon <dilinger@queued.net> | 2008-11-06 16:49:38 -0500 |
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committer | Takashi Iwai <tiwai@suse.de> | 2008-12-10 17:14:42 +0100 |
commit | d6276b78028dfab944dd4a58124aefcc9aa580da (patch) | |
tree | bb0f5cc1937dfe3e9973c9961d6bd732406773a5 /sound/pci/cs5535audio/cs5535audio_olpc.c | |
parent | 1e2232bc70b32f90109d678d1faccf6f50ebba80 (diff) | |
download | kernel_samsung_smdk4412-d6276b78028dfab944dd4a58124aefcc9aa580da.zip kernel_samsung_smdk4412-d6276b78028dfab944dd4a58124aefcc9aa580da.tar.gz kernel_samsung_smdk4412-d6276b78028dfab944dd4a58124aefcc9aa580da.tar.bz2 |
ALSA: cs5535audio: create function for setting OLPC's Analog Input mode
Clean this stuff up a bit..
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/cs5535audio/cs5535audio_olpc.c')
-rw-r--r-- | sound/pci/cs5535audio/cs5535audio_olpc.c | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio_olpc.c b/sound/pci/cs5535audio/cs5535audio_olpc.c index f20e741..597395e 100644 --- a/sound/pci/cs5535audio/cs5535audio_olpc.c +++ b/sound/pci/cs5535audio/cs5535audio_olpc.c @@ -7,12 +7,29 @@ #include <asm/olpc.h> #include "cs5535audio.h" -/* OLPC has an additional feature on top of regular AD1888 codec -features. This is support for an analog input mode. This is a -2 step process. First, to turn off the AD1888 codec bias voltage -and high pass filter. Second, to tell the embedded controller to -reroute from a capacitive trace to a direct trace using an analog -switch. The *_ec()s are what talk to that controller */ +/* + * 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 supported on B2 and later models. + */ +void olpc_analog_input(struct snd_ac97 *ac97, int on) +{ + int err; + + /* update the High Pass Filter (via AC97_AD_TEST2) */ + err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, + 1 << AC97_AD_HPFD_SHIFT, on << AC97_AD_HPFD_SHIFT); + if (err < 0) { + snd_printk(KERN_ERR "setting High Pass Filter - %d\n", err); + return; + } + + /* set Analog Input through GPIO */ + if (on) + geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); + else + geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); +} static int snd_cs5535audio_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) @@ -24,8 +41,6 @@ static int snd_cs5535audio_ctl_info(struct snd_kcontrol *kcontrol, return 0; } -#define AD1888_VREFOUT_EN_BIT (1 << 2) -#define AD1888_HPF_EN_BIT (1 << 12) static int snd_cs5535audio_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { @@ -42,30 +57,9 @@ static int snd_cs5535audio_ctl_get(struct snd_kcontrol *kcontrol, static int snd_cs5535audio_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { - int err; struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol); - u8 value; - struct snd_ac97 *ac97 = cs5535au->ac97; - - /* value is 1 if analog input is desired */ - value = ucontrol->value.integer.value[0]; - - /* turns off High Pass Filter if 1 */ - if (value) - err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, - AD1888_HPF_EN_BIT, AD1888_HPF_EN_BIT); - else - err = snd_ac97_update_bits(ac97, AC97_AD_TEST2, - AD1888_HPF_EN_BIT, 0); - if (err < 0) - snd_printk(KERN_ERR "Error updating AD_TEST2 %d\n", err); - - /* B2 and newer writes directly to a GPIO pin */ - if (value) - geode_gpio_set(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); - else - geode_gpio_clear(OLPC_GPIO_MIC_AC, GPIO_OUTPUT_VAL); + olpc_analog_input(cs5535au->ac97, ucontrol->value.integer.value[0]); return 1; } |