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>

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 748e36c..002e692 100644 (file)
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -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, \