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Diffstat (limited to 'sound/pci/oxygen/oxygen_io.c')
-rw-r--r--sound/pci/oxygen/oxygen_io.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c
index 521eae458348..4b88c7a332e4 100644
--- a/sound/pci/oxygen/oxygen_io.c
+++ b/sound/pci/oxygen/oxygen_io.c
@@ -194,6 +194,24 @@ void oxygen_write_ac97_masked(struct oxygen *chip, unsigned int codec,
}
EXPORT_SYMBOL(oxygen_write_ac97_masked);
+static int oxygen_wait_spi(struct oxygen *chip)
+{
+ unsigned int count;
+
+ /*
+ * Higher timeout to be sure: 200 us;
+ * actual transaction should not need more than 40 us.
+ */
+ for (count = 50; count > 0; count--) {
+ udelay(4);
+ if ((oxygen_read8(chip, OXYGEN_SPI_CONTROL) &
+ OXYGEN_SPI_BUSY) == 0)
+ return 0;
+ }
+ snd_printk(KERN_ERR "oxygen: SPI wait timeout\n");
+ return -EIO;
+}
+
void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data)
{
unsigned int count;