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[ALSA] Define MPU401 registers in sound/mpu401_uart.h

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Define some MPU401 registers in sound/mpu401_uart.h so that other
drivers can refer to them.

Signed-off-by: Takashi Iwai <[email protected]>
This commit is contained in:
Takashi Iwai 2008-04-23 17:47:28 +02:00
commit b415ed45f4
2 changed files with 19 additions and 6 deletions
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15
include/sound/mpu401.h
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@ -102,6 +102,21 @@ struct snd_mpu401 {
#define MPU401C(mpu) (mpu)->cport
#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
/*
*/