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Commit b415ed45 authored by Takashi Iwai's avatar Takashi Iwai
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[ALSA] Define MPU401 registers in sound/mpu401_uart.h 



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

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent efd89d9d

include/sound/mpu401.h

+15 −0
Original line number Diff line number Diff line
@@ -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





/*



 */

sound/drivers/mpu401/mpu401_uart.c

+4 −6
Original line number Diff line number Diff line
@@ -49,12 +49,10 @@ static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu); 


 */



#define snd_mpu401_input_avail(mpu)	(!(mpu->read(mpu, MPU401C(mpu)) & 0x80))

#define snd_mpu401_output_ready(mpu)	(!(mpu->read(mpu, MPU401C(mpu)) & 0x40))



#define MPU401_RESET		0xff

#define MPU401_ENTER_UART	0x3f

#define MPU401_ACK		0xfe

#define snd_mpu401_input_avail(mpu) \

	(!(mpu->read(mpu, MPU401C(mpu)) & MPU401_RX_EMPTY))

#define snd_mpu401_output_ready(mpu) \

	(!(mpu->read(mpu, MPU401C(mpu)) & MPU401_TX_FULL))



/* Build in lowlevel io */

static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data,