b91254e75c
This is no longer necessary, as we're no longer doing indexed i/o commands. Signed-off-by: Andres Salomon <dilinger@debian.org>
119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
#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 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 */
|
|
|
|
static int snd_cs5535audio_ctl_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;
|
|
}
|
|
|
|
#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)
|
|
{
|
|
struct cs5535audio *cs5535au = snd_kcontrol_chip(kcontrol);
|
|
u16 reg1, reg2;
|
|
|
|
/* if either AD1888 VRef Bias and High Pass Filter are enabled
|
|
or the EC is not in analog mode then flag as not in analog mode.
|
|
No EC command to read current analog state so we cache that. */
|
|
reg1 = snd_ac97_read(cs5535au->ac97, AC97_AD_MISC);
|
|
reg2 = snd_ac97_read(cs5535au->ac97, AC97_AD_TEST2);
|
|
|
|
if ((reg1 & AD1888_VREFOUT_EN_BIT) && (reg2 & AD1888_HPF_EN_BIT))
|
|
ucontrol->value.integer.value[0] = 1;
|
|
else
|
|
ucontrol->value.integer.value[0] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
|
|
/* sets High Z on VREF Bias if 1 */
|
|
if (value)
|
|
err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
|
|
AD1888_VREFOUT_EN_BIT, AD1888_VREFOUT_EN_BIT);
|
|
else
|
|
err = snd_ac97_update_bits(ac97, AC97_AD_MISC,
|
|
AD1888_VREFOUT_EN_BIT, 0);
|
|
if (err < 0)
|
|
snd_printk(KERN_ERR "Error updating AD_MISC %d\n", err);
|
|
|
|
/* 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);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct snd_kcontrol_new snd_cs5535audio_controls __devinitdata =
|
|
{
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "Analog Input Switch",
|
|
.info = snd_cs5535audio_ctl_info,
|
|
.get = snd_cs5535audio_ctl_get,
|
|
.put = snd_cs5535audio_ctl_put,
|
|
.private_value = 0
|
|
};
|
|
|
|
void __devinit olpc_prequirks(struct snd_card *card,
|
|
struct snd_ac97_template *ac97)
|
|
{
|
|
if (!machine_is_olpc())
|
|
return;
|
|
|
|
/* invert EAPD if on an OLPC B3 or higher */
|
|
if (olpc_board_at_least(olpc_board_pre(0xb3)))
|
|
ac97->scaps |= AC97_SCAP_INV_EAPD;
|
|
}
|
|
|
|
int __devinit olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
|
|
{
|
|
if (!machine_is_olpc())
|
|
return 0;
|
|
|
|
/* setup callback for mixer control that does analog input mode */
|
|
return snd_ctl_add(card, snd_ctl_new1(&snd_cs5535audio_controls,
|
|
ac97->private_data));
|
|
}
|
|
|