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ALSA: firewire-tascam: Turn on/off FireWire LED 

TASCAM FireWire series has some LEDs on its surface. These LEDs can be
turned on/off by receiving asynchronous transactions to a certain
address. One of the LEDs is labels as 'FireWire'. It's better to light it
up when this driver starts to work. Besides, the LED for 'FireWire' is
turned off at bus reset.

This commit implements this idea.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2015-10-12 19:10:24 +09:00 committed by Takashi Iwai
parent 0db18e7eec
commit e65e2cb99e
2 changed files with 16 additions and 0 deletions
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14
sound/firewire/tascam/tascam-transaction.c
View File

@ -252,6 +252,14 @@ int snd_tscm_transaction_reregister(struct snd_tscm *tscm)
return snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
TSCM_ADDR_BASE + TSCM_OFFSET_MIDI_TX_ON,
&reg, sizeof(reg), 0);
if (err < 0)
return err;
/* Turn on FireWire LED. */
reg = cpu_to_be32(0x0001008e);
return snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
TSCM_ADDR_BASE + TSCM_OFFSET_LED_POWER,
&reg, sizeof(reg), 0);
}
void snd_tscm_transaction_unregister(struct snd_tscm *tscm)
@ -259,6 +267,12 @@ void snd_tscm_transaction_unregister(struct snd_tscm *tscm)
__be32 reg;
unsigned int i;
/* Turn off FireWire LED. */
reg = cpu_to_be32(0x0000008e);
snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,
TSCM_ADDR_BASE + TSCM_OFFSET_LED_POWER,
&reg, sizeof(reg), 0);
/* Turn off messaging. */
reg = cpu_to_be32(0x00000000);
snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST,

2
sound/firewire/tascam/tascam.h
View File

@ -101,6 +101,8 @@ struct snd_tscm {
#define TSCM_OFFSET_MIDI_TX_ADDR_HI 0x0304
#define TSCM_OFFSET_MIDI_TX_ADDR_LO 0x0308
#define TSCM_OFFSET_LED_POWER 0x0404
#define TSCM_OFFSET_MIDI_RX_QUAD 0x4000
enum snd_tscm_clock {