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ALSA: hdspm - Implement generic function to toggle settings 

The driver contains at least six similar functions that change only a
single bit in the control register, only the bit position varies.

This patch implements a generic function to toggle a certain bit
position that will be used to replace the old code.

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 2012-12-03 14:55:49 +01:00 committed by Takashi Iwai
parent b6adb57df1
commit bf0ff87bef
1 changed files with 57 additions and 0 deletions
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57
sound/pci/rme9652/hdspm.c
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@ -2887,6 +2887,63 @@ static int snd_hdspm_get_autosync_ref(struct snd_kcontrol *kcontrol,
return 0;
}
#define HDSPM_TOGGLE_SETTING(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \
.private_value = xindex, \
.info = snd_hdspm_info_toggle_setting, \
.get = snd_hdspm_get_toggle_setting, \
.put = snd_hdspm_put_toggle_setting \
}
static int hdspm_toggle_setting(struct hdspm *hdspm, u32 regmask)
{
return (hdspm->control_register & regmask) ? 1 : 0;
}
static int hdspm_set_toggle_setting(struct hdspm *hdspm, u32 regmask, int out)
{
if (out)
hdspm->control_register |= regmask;
else
hdspm->control_register &= ~regmask;
hdspm_write(hdspm, HDSPM_controlRegister, hdspm->control_register);
return 0;
}
#define snd_hdspm_info_toggle_setting snd_ctl_boolean_mono_info
static int snd_hdspm_get_toggle_setting(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.integer.value[0] = hdspm_toggle_setting(hdspm, regmask);
spin_unlock_irq(&hdspm->lock);
return 0;
}
static int snd_hdspm_put_toggle_setting(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
u32 regmask = kcontrol->private_value;
int change;
unsigned int val;
if (!snd_hdspm_use_is_exclusive(hdspm))
return -EBUSY;
val = ucontrol->value.integer.value[0] & 1;
spin_lock_irq(&hdspm->lock);
change = (int) val != hdspm_toggle_setting(hdspm, regmask);
hdspm_set_toggle_setting(hdspm, regmask, val);
spin_unlock_irq(&hdspm->lock);
return change;
}
#define HDSPM_LINE_OUT(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \