diff options
| author | Takashi Iwai <tiwai@suse.de> | 2008-04-23 17:47:28 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-04-24 12:38:22 +0200 |
| commit | b415ed45f4db9f8365daac84cf2518642a174dc0 (patch) | |
| tree | 9cb81b685a0b73b5f8b41e41d389fc41a6466fd5 | |
| parent | efd89d9dcf75ab0a31b200db0ae4ae19cad25e48 (diff) | |
[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: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | include/sound/mpu401.h | 15 | ||||
| -rw-r--r-- | sound/drivers/mpu401/mpu401_uart.c | 10 |
2 files changed, 19 insertions, 6 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 + + +/* */ diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c index dd6ec4266732..18cca2457d44 100644 --- a/sound/drivers/mpu401/mpu401_uart.c +++ b/sound/drivers/mpu401/mpu401_uart.c @@ -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, |