[ALSA] ice1724: fix MIDI

The VT1724 MIDI port is not MPU-401 compatible; remove the hacks that
try to make the MPU-401 library work with it, and just use some simple
device-specific code.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Tested-by: Pavel Hofman <pavel.hofman@insite.cz>

1 files changed, 7 insertions, 3 deletions

diff --git a/sound/pci/ice1712/envy24ht.h b/sound/pci/ice1712/envy24ht.h
index 43b9e3e858be..a0c5e009bb4a 100644
--- a/sound/pci/ice1712/envy24ht.h
+++ b/sound/pci/ice1712/envy24ht.h
@@ -93,9 +93,13 @@ enum {
 #define VT1724_REG_MPU_TXFIFO           0x0a    /*byte ro. number of bytes in TX fifo*/
 #define VT1724_REG_MPU_RXFIFO           0x0b    /*byte ro. number of bytes in RX fifo*/
 
-//are these 2 the wrong way around? they don't seem to be used yet anyway
-#define VT1724_REG_MPU_CTRL             0x0c    /* byte */
-#define VT1724_REG_MPU_DATA             0x0d    /* byte */
+#define VT1724_REG_MPU_DATA             0x0c    /* byte */
+#define VT1724_REG_MPU_CTRL             0x0d    /* byte */
+#define   VT1724_MPU_UART       0x01
+#define   VT1724_MPU_TX_EMPTY   0x02
+#define   VT1724_MPU_TX_FULL    0x04
+#define   VT1724_MPU_RX_EMPTY   0x08
+#define   VT1724_MPU_RX_FULL    0x10
 
 #define VT1724_REG_MPU_FIFO_WM  0x0e    /*byte set the high/low watermarks for RX/TX fifos*/
 #define   VT1724_MPU_RX_FIFO    0x20    //1=rx fifo watermark 0=tx fifo watermark