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ALSA: hdspm - Introduce generic AIO tristate control

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AIO cards offer at least four individual settings options with three
states each. Those settings are represented as two bits in the settings
register with the following meaning:

   0*some_base_bit --> Option value 0
   1*some_base_bit --> Option value 1
   2*some_base_bit --> Option value 2
   3*some_base_bit --> mask to select the two involved bits

This patch adds a generic ALSA control macro for such a value-to-bit
pattern mapping. It will be used in a later commit to expose four new
controls.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Adrian Knoth 2013-07-05 11:28:00 +02:00 committed by Takashi Iwai
parent 8cea571042
commit acf14767e1
1 changed files with 78 additions and 0 deletions
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78
sound/pci/rme9652/hdspm.c
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@ -3348,6 +3348,84 @@ static int snd_hdspm_put_qs_wire(struct snd_kcontrol *kcontrol,
return change;
}
#define HDSPM_CONTROL_TRISTATE(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \
.private_value = xindex, \
.info = snd_hdspm_info_tristate, \
.get = snd_hdspm_get_tristate, \
.put = snd_hdspm_put_tristate \
}
static int hdspm_tristate(struct hdspm *hdspm, u32 regmask)
{
u32 reg = hdspm->settings_register & (regmask * 3);
return reg / regmask;
}
static int hdspm_set_tristate(struct hdspm *hdspm, int mode, u32 regmask)
{
hdspm->settings_register &= ~(regmask * 3);
hdspm->settings_register |= (regmask * mode);
hdspm_write(hdspm, HDSPM_WR_SETTINGS, hdspm->settings_register);
return 0;
}
static int snd_hdspm_info_tristate(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
u32 regmask = kcontrol->private_value;
static char *texts_spdif[] = { "Optical", "Coaxial", "Internal" };
static char *texts_levels[] = { "Hi Gain", "+4 dBu", "-10 dBV" };
switch (regmask) {
case HDSPM_c0_Input0:
ENUMERATED_CTL_INFO(uinfo, texts_spdif);
break;
default:
ENUMERATED_CTL_INFO(uinfo, texts_levels);
break;
}
return 0;
}
static int snd_hdspm_get_tristate(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
u32 regmask = kcontrol->private_value;
spin_lock_irq(&hdspm->lock);
ucontrol->value.enumerated.item[0] = hdspm_tristate(hdspm, regmask);
spin_unlock_irq(&hdspm->lock);
return 0;
}
static int snd_hdspm_put_tristate(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
u32 regmask = kcontrol->private_value;
int change;
int val;
if (!snd_hdspm_use_is_exclusive(hdspm))
return -EBUSY;
val = ucontrol->value.integer.value[0];
if (val < 0)
val = 0;
if (val > 2)
val = 2;
spin_lock_irq(&hdspm->lock);
change = val != hdspm_tristate(hdspm, regmask);
hdspm_set_tristate(hdspm, val, regmask);
spin_unlock_irq(&hdspm->lock);
return change;
}
#define HDSPM_MADI_SPEEDMODE(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \