diff options
Diffstat (limited to 'include/sound/mpu401.h')
| -rw-r--r-- | include/sound/mpu401.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/sound/mpu401.h b/include/sound/mpu401.h index d45218b44dfe..68b634b75068 100644 --- a/include/sound/mpu401.h +++ b/include/sound/mpu401.h @@ -103,6 +103,21 @@ struct snd_mpu401 { #define MPU401D(mpu) (mpu)->port /* + * control register bits + */ +/* read MPU401C() */ +#define MPU401_RX_EMPTY 0x80 +#define MPU401_TX_FULL 0x40 + +/* write MPU401C() */ +#define MPU401_RESET 0xff +#define MPU401_ENTER_UART 0x3f + +/* read MPU401D() */ +#define MPU401_ACK 0xfe + + +/* */ |