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ALSA: snd-atmel-ac97c: cleanup register definitions 

This patch will remove traces of channel B registers, since they are not
used by the AC97C driver. Channel B might be used for other purposes.

The driver also adds channel status bits TXEMPTY and OVRUN and a
AC97C_CH_MASK macro to ease clearing a channel settings.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Hans-Christian Egtvedt 2009-04-02 08:21:10 +02:00 committed by Takashi Iwai
parent 0221c81b1b
commit 8321fc0113
1 changed files with 8 additions and 6 deletions
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14
sound/atmel/ac97c.h
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@ -1,5 +1,5 @@
/*
* Register definitions for the Atmel AC97C controller
* Register definitions for Atmel AC97C
*
* Copyright (C) 2005-2009 Atmel Corporation
*
@ -17,10 +17,6 @@
#define AC97C_CATHR 0x24
#define AC97C_CASR 0x28
#define AC97C_CAMR 0x2c
#define AC97C_CBRHR 0x30
#define AC97C_CBTHR 0x34
#define AC97C_CBSR 0x38
#define AC97C_CBMR 0x3c
#define AC97C_CORHR 0x40
#define AC97C_COTHR 0x44
#define AC97C_COSR 0x48
@ -46,8 +42,10 @@
#define AC97C_MR_VRA (1 << 2)
#define AC97C_CSR_TXRDY (1 << 0)
#define AC97C_CSR_TXEMPTY (1 << 1)
#define AC97C_CSR_UNRUN (1 << 2)
#define AC97C_CSR_RXRDY (1 << 4)
#define AC97C_CSR_OVRUN (1 << 5)
#define AC97C_CSR_ENDTX (1 << 10)
#define AC97C_CSR_ENDRX (1 << 14)
@ -61,11 +59,15 @@
#define AC97C_CMR_DMAEN (1 << 22)
#define AC97C_SR_CAEVT (1 << 3)
#define AC97C_SR_COEVT (1 << 2)
#define AC97C_SR_WKUP (1 << 1)
#define AC97C_SR_SOF (1 << 0)
#define AC97C_CH_MASK(slot) \
(0x7 << (3 * (AC97_SLOT_##slot - 3)))
#define AC97C_CH_ASSIGN(slot, channel) \
(AC97C_CHANNEL_##channel << (3 * (AC97_SLOT_##slot - 3)))
#define AC97C_CHANNEL_NONE 0x0
#define AC97C_CHANNEL_A 0x1
#define AC97C_CHANNEL_B 0x2
#endif /* __SOUND_ATMEL_AC97C_H */