ALSA: hdspm - Provide MADI speed mode selector on RME MADI and MADIface

When running in slave mode (no clock master), there is no way to
determine the real wirespeed on the MADI link (single/double/quad
speed). Like physical gear, simply provide the user with a tristate
switch to select the appropriate format.

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 af130ee0c45d9dda8d294e5793c6c67b72be5f24..d21964994168cce0f81c4546156174f6490e2487 100644 (file)
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -3415,6 +3415,91 @@ static int snd_hdspm_put_qs_wire(struct snd_kcontrol *kcontrol,
        return change;
 }
 
+#define HDSPM_MADI_SPEEDMODE(xname, xindex) \
+{      .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+       .name = xname, \
+       .index = xindex, \
+       .info = snd_hdspm_info_madi_speedmode, \
+       .get = snd_hdspm_get_madi_speedmode, \
+       .put = snd_hdspm_put_madi_speedmode \
+}
+
+static int hdspm_madi_speedmode(struct hdspm *hdspm)
+{
+       if (hdspm->control_register & HDSPM_QuadSpeed)
+               return 2;
+       if (hdspm->control_register & HDSPM_DoubleSpeed)
+               return 1;
+       return 0;
+}
+
+static int hdspm_set_madi_speedmode(struct hdspm *hdspm, int mode)
+{
+       hdspm->control_register &= ~(HDSPM_DoubleSpeed | HDSPM_QuadSpeed);
+       switch (mode) {
+       case 0:
+               break;
+       case 1:
+               hdspm->control_register |= HDSPM_DoubleSpeed;
+               break;
+       case 2:
+               hdspm->control_register |= HDSPM_QuadSpeed;
+               break;
+       }
+       hdspm_write(hdspm, HDSPM_controlRegister, hdspm->control_register);
+
+       return 0;
+}
+
+static int snd_hdspm_info_madi_speedmode(struct snd_kcontrol *kcontrol,
+                                      struct snd_ctl_elem_info *uinfo)
+{
+       static char *texts[] = { "Single", "Double", "Quad" };
+
+       uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+       uinfo->count = 1;
+       uinfo->value.enumerated.items = 3;
+
+       if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
+               uinfo->value.enumerated.item =
+                   uinfo->value.enumerated.items - 1;
+       strcpy(uinfo->value.enumerated.name,
+              texts[uinfo->value.enumerated.item]);
+
+       return 0;
+}
+
+static int snd_hdspm_get_madi_speedmode(struct snd_kcontrol *kcontrol,
+                                     struct snd_ctl_elem_value *ucontrol)
+{
+       struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
+
+       spin_lock_irq(&hdspm->lock);
+       ucontrol->value.enumerated.item[0] = hdspm_madi_speedmode(hdspm);
+       spin_unlock_irq(&hdspm->lock);
+       return 0;
+}
+
+static int snd_hdspm_put_madi_speedmode(struct snd_kcontrol *kcontrol,
+                                     struct snd_ctl_elem_value *ucontrol)
+{
+       struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
+       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_madi_speedmode(hdspm);
+       hdspm_set_madi_speedmode(hdspm, val);
+       spin_unlock_irq(&hdspm->lock);
+       return change;
+}
 
 #define HDSPM_MIXER(xname, xindex) \
 { .iface = SNDRV_CTL_ELEM_IFACE_HWDEP, \
@@ -4289,7 +4374,8 @@ static struct snd_kcontrol_new snd_hdspm_controls_madi[] = {
        HDSPM_TX_64("TX 64 channels mode", 0),
        HDSPM_C_TMS("Clear Track Marker", 0),
        HDSPM_SAFE_MODE("Safe Mode", 0),
-       HDSPM_INPUT_SELECT("Input Select", 0)
+       HDSPM_INPUT_SELECT("Input Select", 0),
+       HDSPM_MADI_SPEEDMODE("MADI Speed Mode", 0)
 };
 
 
@@ -4302,7 +4388,8 @@ static struct snd_kcontrol_new snd_hdspm_controls_madiface[] = {
        HDSPM_SYNC_CHECK("MADI SyncCheck", 0),
        HDSPM_TX_64("TX 64 channels mode", 0),
        HDSPM_C_TMS("Clear Track Marker", 0),
-       HDSPM_SAFE_MODE("Safe Mode", 0)
+       HDSPM_SAFE_MODE("Safe Mode", 0),
+       HDSPM_MADI_SPEEDMODE("MADI Speed Mode", 0)
 };
 
 static struct snd_kcontrol_new snd_hdspm_controls_aio[] = {