[ALSA] fm801 - Add mute support for FM-only card with FM801 PCI to tuner bridge

[safe/jmp/linux-2.6] / sound / pci / fm801.c

diff --git a/sound/pci/fm801.c b/sound/pci/fm801.c
index 25c1087..4c300e6 100644 (file)
--- a/sound/pci/fm801.c
+++ b/sound/pci/fm801.c
@@ -978,6 +978,27 @@ static unsigned int snd_fm801_tea575x_64pcr_read(struct snd_tea575x *tea)
        return val;
 }
 
+static void snd_fm801_tea575x_64pcr_mute(struct snd_tea575x *tea,
+                                         unsigned int mute)
+{
+       struct fm801 *chip = tea->private_data;
+       unsigned short reg;
+
+       spin_lock_irq(&chip->reg_lock);
+
+       reg = inw(FM801_REG(chip, GPIO_CTRL));
+       if (mute)
+               /* 0xf800 (mute) */
+               reg &= ~FM801_GPIO_GP(TEA_64PCR_WRITE_ENABLE);
+       else
+               /* 0xf802 (unmute) */
+               reg |= FM801_GPIO_GP(TEA_64PCR_WRITE_ENABLE);
+       outw(reg, FM801_REG(chip, GPIO_CTRL));
+       udelay(1);
+
+       spin_unlock_irq(&chip->reg_lock);
+}
+
 static struct snd_tea575x_ops snd_fm801_tea_ops[3] = {
        {
                /* 1 = MediaForte 256-PCS */
@@ -993,6 +1014,7 @@ static struct snd_tea575x_ops snd_fm801_tea_ops[3] = {
                /* 3 = MediaForte 64-PCR */
                .write = snd_fm801_tea575x_64pcr_write,
                .read = snd_fm801_tea575x_64pcr_read,
+               .mute = snd_fm801_tea575x_64pcr_mute,
        }
 };
 #endif