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|
/****************************************************************************
*
* Copyright (c) 2004 - 2007 Winbond Electronics Corp. All rights reserved.
*
*
* FILENAME
* w90n745_AC97.c
*
* VERSION
* 1.2
*
* DESCRIPTION
* AC97 interface for W83972D codec
*
* DATA STRUCTURES
* None
*
* FUNCTIONS
* ...
*
* HISTORY
* 2004.06.01 Created by Yung-Chang Huang
* 2004.09.02 Ver 1.0 Modify for w90n745 coding standard
* 2005.11.24 Ver 1.1 Modified for uCLinux Sound Driver by PC34 QFu
* 2006.01.17 Ver 1.2 Modified for w90n745 Version B
*
* REMARK
* None
*
**************************************************************************/
#include <linux/soundcard.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>
#include "w90n745_audio_regs.h"
#include "w90n745_audio.h"
#include "w90n745_ac97.h"
//#define AC97_DEBUG
//#define AC97_DEBUG_ENTER_LEAVE
//#define AC97_DEBUG_MSG
//#define AC97_DEBUG_MSG2
#ifdef AC97_DEBUG
#define DBG(fmt, arg...) printk(fmt, ##arg)
#else
#define DBG(fmt, arg...)
#endif
#ifdef AC97_DEBUG_ENTER_LEAVE
#define ENTER() DBG("[%-10s] : Enter\n", __FUNCTION__)
#define LEAVE() DBG("[%-10s] : Leave\n", __FUNCTION__)
#else
#define ENTER()
#define LEAVE()
#endif
#ifdef AC97_DEBUG_MSG
#define MSG(fmt) DBG("[%-10s] : "fmt, __FUNCTION__)
#else
#define MSG(fmt)
#endif
#ifdef AC97_DEBUG_MSG2
#define MSG2(fmt, arg...) DBG("[%-10s] : "fmt, __FUNCTION__, ##arg)
#else
#define MSG2(fmt, arg...)
#endif
#define AUDIO_WRITE(addr, val) writel(val, addr)
#define AUDIO_READ(addr) readl(addr)
static AUDIO_T _tAC97;
static int _bAC97Active = 0;
static volatile int _bPlayDmaToggle, _bRecDmaToggle;
static void ac97StopPlay(void);
struct semaphore ac97_sem;
static unsigned int ac97_read_register(INT nIdx)
{
volatile INT nWait;
unsigned int i;
down(&ac97_sem);
/* set the R_WB bit and write register index */
AUDIO_WRITE(REG_ACTL_ACOS1, 0x80 | nIdx);
/* set the valid frame bit and valid slots */
AUDIO_WRITE(REG_ACTL_ACOS0, AUDIO_READ(REG_ACTL_ACOS0) |0x11);
udelay(100);
/* polling the AC_R_FINISH */
for (nWait = 0; nWait < 0x10000; nWait++)
{
if (AUDIO_READ(REG_ACTL_ACCON) & AC_R_FINISH)
break;
}
if (nWait == 0x10000)
MSG("ac97_read_register time out!\n");
AUDIO_WRITE(REG_ACTL_ACOS0, AUDIO_READ(REG_ACTL_ACOS0) & ~1);
if (AUDIO_READ(REG_ACTL_ACIS1) >> 2 != nIdx)
{ MSG2("ac97_read_register - R_INDEX of REG_ACTL_ACIS1 not match!, 0x%x\n", AUDIO_READ(REG_ACTL_ACIS1)); }
udelay(100);
i = AUDIO_READ(REG_ACTL_ACIS2) & 0xFFFF;
up(&ac97_sem);
return (i);
}
static int ac97_write_register(INT nIdx, UINT16 sValue)
{
volatile INT nWait;
down(&ac97_sem);
/* clear the R_WB bit and write register index */
AUDIO_WRITE(REG_ACTL_ACOS1, nIdx);
/* write register value */
AUDIO_WRITE(REG_ACTL_ACOS2, (UINT32)sValue);
/* set the valid frame bit and valid slots */
AUDIO_WRITE(REG_ACTL_ACOS0, AUDIO_READ(REG_ACTL_ACOS0) | 0x13);
udelay(100);
/* polling the AC_W_FINISH */
for (nWait = 0; nWait < 0x10000; nWait++)
{
if (!(AUDIO_READ(REG_ACTL_ACCON) & AC_W_FINISH))
break;
}
AUDIO_WRITE(REG_ACTL_ACOS0, AUDIO_READ(REG_ACTL_ACOS0) & ~3);
up(&ac97_sem);
// paraniod?
//if (ac97_read_register(nIdx) != sValue)
// MSG2("ac97_write_register, nIdx=0x%x, mismatch, 0x%x must be 0x%x\n", nIdx, ac97_read_register(nIdx), sValue);
return 0;
}
#if 0
static void ac97_read_all_registers()
{
MSG("AC97_RESET = 0x%04x\n", ac97_read_register(AC97_RESET));
MSG("AC97_MASTER_VOLUME = 0x%04x\n", ac97_read_register(AC97_MASTER_VOLUME));
MSG("AC97_AUX_OUT_VOLUME = 0x%04x\n", ac97_read_register(AC97_AUX_OUT_VOLUME));
MSG("AC97_MONO_VOLUME = 0x%04x\n", ac97_read_register(AC97_MONO_VOLUME));
MSG("AC97_MASTER_TONE = 0x%04x\n", ac97_read_register(AC97_MASTER_TONE));
MSG("AC97_PC_BEEP_VOLUME = 0x%04x\n", ac97_read_register(AC97_PC_BEEP_VOLUME));
MSG("AC97_PHONE_VOLUME = 0x%04x\n", ac97_read_register(AC97_PHONE_VOLUME));
MSG("AC97_MIC_VOLUME = 0x%04x\n", ac97_read_register(AC97_MIC_VOLUME));
MSG("AC97_LINE_IN_VOLUME = 0x%04x\n", ac97_read_register(AC97_LINE_IN_VOLUME));
MSG("AC97_CD_VOLUME = 0x%04x\n", ac97_read_register(AC97_CD_VOLUME));
MSG("AC97_VIDEO_VOLUME = 0x%04x\n", ac97_read_register(AC97_VIDEO_VOLUME));
MSG("AC97_AUX_IN_VOLUME = 0x%04x\n", ac97_read_register(AC97_AUX_IN_VOLUME));
MSG("AC97_PCM_OUT_VOLUME = 0x%04x\n", ac97_read_register(AC97_PCM_OUT_VOLUME));
MSG("AC97_RECORD_SELECT = 0x%04x\n", ac97_read_register(AC97_RECORD_SELECT));
MSG("AC97_RECORD_GAIN = 0x%04x\n", ac97_read_register(AC97_RECORD_GAIN));
MSG("AC97_RECORD_GAIN_MIC = 0x%04x\n", ac97_read_register(AC97_RECORD_GAIN_MIC));
MSG("AC97_GENERAL_PURPOSE = 0x%04x\n", ac97_read_register(AC97_GENERAL_PURPOSE));
MSG("AC97_3D_CONTROL = 0x%04x\n", ac97_read_register(AC97_3D_CONTROL));
MSG("AC97_AUDIO_INT_PAGING = 0x%04x\n", ac97_read_register(AC97_AUDIO_INT_PAGING));
MSG("AC97_POWERDOWN_CTRL = 0x%04x\n", ac97_read_register(AC97_POWERDOWN_CTRL));
MSG("AC97_FRONT_DAC_RATE = 0x%04x\n", ac97_read_register(AC97_FRONT_DAC_RATE));
}
#endif
static void ac97_play_isr(void)
{
int bPlayLastBlock;
ENTER();
if(!(AUDIO_READ(REG_ACTL_CON) & T_DMA_IRQ))
return;
AUDIO_WRITE(REG_ACTL_CON, AUDIO_READ(REG_ACTL_CON) | T_DMA_IRQ);
if (_bPlayDmaToggle == 0)
{
if (AUDIO_READ(REG_ACTL_PSR) & P_DMA_MIDDLE_IRQ)
AUDIO_WRITE(REG_ACTL_PSR, P_DMA_MIDDLE_IRQ);
else
MSG("ac97_play_isr - miss middle!\n");
_bPlayDmaToggle = 1;
bPlayLastBlock = _tAC97.fnPlayCallBack(_tAC97.uPlayBufferAddr,
_tAC97.uPlayBufferLength/2);
}
else
{
if (AUDIO_READ(REG_ACTL_PSR) & P_DMA_END_IRQ)
AUDIO_WRITE(REG_ACTL_PSR, P_DMA_END_IRQ);
else
MSG("ac97_play_isr - miss end!\n");
_bPlayDmaToggle = 0;
bPlayLastBlock = _tAC97.fnPlayCallBack(_tAC97.uPlayBufferAddr+ _tAC97.uPlayBufferLength/ 2,
_tAC97.uPlayBufferLength/2);
}
/* here, we will check whether the next buffer is ready. If not, stop play. */
if (bPlayLastBlock)
AUDIO_WRITE(REG_ACTL_PSR, P_DMA_MIDDLE_IRQ | P_DMA_END_IRQ);
LEAVE();
}
static void ac97_rec_isr(void)
{
int bPlayLastBlock;
ENTER();
if(!(AUDIO_READ(REG_ACTL_CON) & R_DMA_IRQ))
return;
AUDIO_WRITE(REG_ACTL_CON, AUDIO_READ(REG_ACTL_CON) | R_DMA_IRQ);
if (_bRecDmaToggle == 0)
{
if (AUDIO_READ(REG_ACTL_RSR) & R_DMA_MIDDLE_IRQ)
AUDIO_WRITE(REG_ACTL_RSR, R_DMA_MIDDLE_IRQ);
else
MSG("ac97_rec_isr - miss middle!\n");
_bRecDmaToggle = 1;
bPlayLastBlock = _tAC97.fnRecCallBack(_tAC97.uRecordBufferAddr,
_tAC97.uRecordBufferLength/2);
}
else
{
if (AUDIO_READ(REG_ACTL_RSR) & R_DMA_END_IRQ)
AUDIO_WRITE(REG_ACTL_RSR, R_DMA_END_IRQ);
else
MSG("ac97_rec_isr - miss end!\n");
_bRecDmaToggle = 0;
bPlayLastBlock = _tAC97.fnRecCallBack(_tAC97.uRecordBufferAddr + _tAC97.uRecordBufferLength / 2,
_tAC97.uRecordBufferLength /2);
}
if (bPlayLastBlock)
AUDIO_WRITE(REG_ACTL_RSR, R_DMA_MIDDLE_IRQ | R_DMA_END_IRQ);
LEAVE();
}
static int ac97_reset(void)
{
ENTER();
AUDIO_WRITE(REG_CLKSEL, AUDIO_READ(REG_CLKSEL) | 0x10000);
AUDIO_WRITE(0xFFF83000,0x155);//GPIO_CFG0 PT0CFG0~4
AUDIO_WRITE(0xFFF83004,0xd);//GPIO4,1:In GPIO0,2,3:Out
//AUDIO_WRITE(REG_GPIOA_OE, (AUDIO_READ(REG_GPIOA_OE) & 0xFFFFC0FF) | 0x2700);
/* disable pull-high/low */
//AUDIO_WRITE(REG_GPIOA_PE, 0x3F00);
udelay(1000);
_tAC97.sPlayVolume = 0x0000;
_tAC97.sRecVolume = 0x0000;
/* enable audio controller and AC-link interface */
AUDIO_WRITE(REG_ACTL_CON, IIS_AC_PIN_SEL | AUDIO_EN | ACLINK_EN | PFIFO_EN | RFIFO_EN | T_DMA_IRQ | R_DMA_IRQ | DMA_EN);
udelay(1000);
/* reset Audio Controller */
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | ACTL_RESET_BIT);
udelay(1000);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) & ~ACTL_RESET_BIT);
udelay(1000);
/* reset AC-link interface */
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | AC_RESET);
udelay(1000);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) & ~AC_RESET);
udelay(1000);
/* cold reset AC 97 */
AUDIO_WRITE(REG_ACTL_ACCON, AUDIO_READ(REG_ACTL_ACCON) | AC_C_RES);
udelay(1000);
AUDIO_WRITE(REG_ACTL_ACCON, AUDIO_READ(REG_ACTL_ACCON) & ~AC_C_RES);
udelay(1000);
if (!(AUDIO_READ(REG_ACTL_ACIS0) & 0x10))
{
MSG("Error - AC97 codec ready was not set, cold reset failed!\n");
return ERR_AC97_CODEC_RESET;
}
udelay(100);
//ac97_read_all_registers();
/* set volumes */
ac97_write_register(AC97_MASTER_VOLUME, _tAC97.sPlayVolume);
ac97_write_register(AC97_MONO_VOLUME, 0x000f);
//ac97_write_register(AC97_MASTER_TONE, 0x0303);
ac97_write_register(AC97_MIC_VOLUME, 0x8000);
//ac97_write_register(AC97_LINE_IN_VOLUME, 0x0707);
//ac97_write_register(AC97_AUX_IN_VOLUME, 0x0707);
ac97_write_register(AC97_PCM_OUT_VOLUME, _tAC97.sPlayVolume);
ac97_write_register(AC97_RECORD_SELECT, 0); /* record select MIC in */
ac97_write_register(AC97_RECORD_GAIN, 0x0404);
ac97_write_register(AC97_RECORD_GAIN_MIC, 0x0004);
ac97_write_register(AC97_GENERAL_PURPOSE, 0);
LEAVE();
return 0;
}
static VOID ac97SetPlaySampleRate(INT nSamplingRate)
{
ENTER();
/* set play sampling rate */
if (nSamplingRate != 48000)
{
/* enable VRA and set sampling frequency */
ac97_write_register(AC97_EXT_AUDIO_CTRL, ac97_read_register(AC97_EXT_AUDIO_CTRL)|0x1);
ac97_write_register(AC97_FRONT_DAC_RATE, nSamplingRate);
}
_tAC97.nPlaySamplingRate = nSamplingRate;
LEAVE();
}
static VOID ac97SetRecordSampleRate(INT nSamplingRate)
{
ENTER();
/* set record sampling rate */
if (nSamplingRate != 48000)
{
/* enable VRA and set sampling frequency */
ac97_write_register(AC97_EXT_AUDIO_CTRL, ac97_read_register(AC97_EXT_AUDIO_CTRL)|0x1);
ac97_write_register(AC97_LR_ADC_RATE, nSamplingRate);
}
_tAC97.nRecSamplingRate = nSamplingRate;
LEAVE();
}
static VOID ac97SetPlayCallBackFunction(AU_CB_FUN_T fnCallBack)
{
ENTER();
_tAC97.fnPlayCallBack = fnCallBack;
LEAVE();
}
static VOID ac97SetRecordCallBackFunction(AU_CB_FUN_T fnCallBack)
{
ENTER();
_tAC97.fnRecCallBack = fnCallBack;
LEAVE();
}
/*************************************************************************/
/* */
/* FUNCTION */
/* ac97SetPlayVolume */
/* */
/* DESCRIPTION */
/* Set AC97 left and right channel play volume. */
/* */
/* INPUTS */
/* ucLeftVol play volume of left channel */
/* ucRightVol play volume of left channel */
/* 0: mute */
/* 1: minimal volume */
/* 31: maxmum volume */
/* */
/* OUTPUTS */
/* None */
/* */
/* RETURN */
/* 0 Success */
/* Otherwise error */
/* */
/*************************************************************************/
static int ac97SetPlayVolume(UINT32 ucLeftVol, UINT32 ucRightVol)
{
int nLData, nRData;
ENTER();
//MSG2("Set AC97 volume to : %d-%d\n", ucLeftVol, ucRightVol);
if (ucLeftVol == 0)
nLData = 0x80;
else
nLData = 31 - (ucLeftVol & 0x1f);
if (ucRightVol == 0)
nRData = 0x80;
else
nRData = 31 - (ucRightVol & 0x1f);
_tAC97.sPlayVolume = (nLData << 8) | nRData;
ac97_write_register(AC97_PCM_OUT_VOLUME, (nLData << 8) | nRData);
//ac97_write_register(AC97_PCM_OUT_VOLUME, 0x101);
if (ucLeftVol == 0)
nLData = 0x80;
else
nLData = 62 - ucLeftVol*2;
if (ucRightVol == 0)
nRData = 0x80;
else
nRData = 62 - ucRightVol*2;
ac97_write_register(AC97_AUX_OUT_VOLUME, (nLData << 8) | nRData);
ac97_write_register(AC97_MASTER_VOLUME, (nLData << 8) | nRData);
MSG2("AC97_MASTER_VOLUME = 0x%04x\r\n", ac97_read_register(AC97_MASTER_VOLUME));
MSG2("AC97_AUX_OUT_VOLUME = 0x%04x\r\n", ac97_read_register(AC97_AUX_OUT_VOLUME));
MSG2("AC97_PCM_OUT_VOLUME = 0x%04x\r\n", ac97_read_register(AC97_PCM_OUT_VOLUME));
#if 0
down(&ac97_sem);
if (_bAC97Active & AC97_PLAY_ACTIVE)
AUDIO_WRITE(REG_ACTL_ACOS0, 0x1f);
else
AUDIO_WRITE(REG_ACTL_ACOS0, 0);
up(&ac97_sem);
#endif
LEAVE();
return 0;
}
/*************************************************************************/
/* */
/* FUNCTION */
/* ac97SetRecordVolume */
/* */
/* DESCRIPTION */
/* Set AC97 left and right channel record volume. */
/* */
/* INPUTS */
/* ucLeftVol record volume of left channel */
/* ucRightVol record volume of left channel */
/* 0: mute */
/* 1: minimal volume */
/* 31: maxmum volume */
/* */
/* OUTPUTS */
/* None */
/* */
/* RETURN */
/* 0 Success */
/* Otherwise error */
/* */
/*************************************************************************/
static int ac97SetRecordVolume(UINT32 ucLeftVol, UINT32 ucRightVol)
{
//INT nStatus;
ENTER();
if (ucLeftVol == 0)
ucLeftVol = 0x80;
else
ucLeftVol = 32 - (ucLeftVol & 0x1f);
if (ucRightVol == 0)
ucRightVol = 0x80;
else
ucRightVol = 32 - (ucRightVol & 0x1f);
_tAC97.sRecVolume = (ucLeftVol << 8) | ucRightVol;
ac97_write_register(AC97_MIC_VOLUME, ucRightVol );
//ac97_read_all_registers();
LEAVE();
return 0;
}
/*************************************************************************/
/* */
/* FUNCTION */
/* ac97StartPlay */
/* */
/* DESCRIPTION */
/* Start AC97 playback. */
/* */
/* INPUTS */
/* fnCallBack client program provided callback function. The audio */
/* driver will call back to get next block of PCM data */
/* nSamplingRate the playback sampling rate. Supported sampling */
/* rate are 48000, 44100, 32000, 24000, 22050, 16000, */
/* 11025, and 8000 Hz */
/* nChannels number of playback nChannels */
/* 1: single channel, otherwise: double nChannels */
/* */
/* OUTPUTS */
/* None */
/* */
/* RETURN */
/* 0 Success */
/* Otherwise error */
/* */
/*************************************************************************/
static int ac97StartPlay(AU_CB_FUN_T fnCallBack, INT nSamplingRate, INT nChannels)
{
INT nStatus;
ENTER();
if (_bAC97Active & AC97_PLAY_ACTIVE)
return ERR_AC97_PLAY_ACTIVE; /* AC97 was playing */
if (_bAC97Active == 0)
{
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) &~PLAY_LEFT_CHNNEL &~PLAY_RIGHT_CHNNEL);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | PLAY_RIGHT_CHNNEL);
if (nChannels != 1)
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | PLAY_LEFT_CHNNEL);
nStatus = ac97_reset();
if (nStatus < 0)
return nStatus;
}
/* disable by Qfu , for the installation of irq has been done in wb_audio.c
the only thing to do is to enable irq by this routine */
Enable_Int(AU_PLAY_INT_NUM);
/* set play sampling rate */
ac97SetPlaySampleRate(nSamplingRate);
ac97SetPlayCallBackFunction(fnCallBack);
/* set DMA play destination base address */
AUDIO_WRITE(REG_ACTL_PDSTB, _tAC97.uPlayBufferAddr);
/* set DMA play buffer length */
AUDIO_WRITE(REG_ACTL_PDST_LENGTH, _tAC97.uPlayBufferLength);
/* start playing */
MSG("AC97 start playing...\n");
_bPlayDmaToggle = 0;
down(&ac97_sem);
AUDIO_WRITE(REG_ACTL_ACOS0, AUDIO_READ(REG_ACTL_ACOS0) | 0x1C);
up(&ac97_sem);
AUDIO_WRITE(REG_ACTL_PSR, 0x3);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | AC_PLAY);
_bAC97Active |= AC97_PLAY_ACTIVE;
LEAVE();
return 0;
}
/*************************************************************************/
/* */
/* FUNCTION */
/* ac97StopPlay */
/* */
/* DESCRIPTION */
/* Stop AC97 playback immdediately. */
/* */
/* INPUTS */
/* None */
/* */
/* OUTPUTS */
/* None */
/* */
/* RETURN */
/* 0 Success */
/* Otherwise error */
/* */
/*************************************************************************/
static void ac97StopPlay(void)
{
ENTER();
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) & ~(PLAY_RIGHT_CHNNEL | PLAY_LEFT_CHNNEL));
if (!(_bAC97Active & AC97_PLAY_ACTIVE))
return;
//ac97_read_all_registers ();
/* stop playing */
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) & ~AC_PLAY);
down(&ac97_sem);
AUDIO_WRITE(REG_ACTL_ACOS0, AUDIO_READ(REG_ACTL_ACOS0) & ~0xC);
up(&ac97_sem);
_bAC97Active &= ~AC97_PLAY_ACTIVE;
/* disable audio play interrupt */
if (!_bAC97Active)
Disable_Int(AU_PLAY_INT_NUM);
LEAVE();
return;
}
/*************************************************************************/
/* */
/* FUNCTION */
/* ac97StartRecord */
/* */
/* DESCRIPTION */
/* Start AC97 record. */
/* */
/* INPUTS */
/* fnCallBack client program provided callback function. The audio */
/* driver will call back to deliver the newly recorded */
/* block of PCM data */
/* nSamplingRate the record sampling rate. Supported sampling */
/* rate are 48000, 44100, 32000, 24000, 22050, 16000, */
/* 11025, and 8000 Hz */
/* nChannels number of record nChannels */
/* 1: single channel, otherwise: double nChannels */
/* */
/* OUTPUTS */
/* None */
/* */
/* RETURN */
/* 0 Success */
/* Otherwise error */
/* */
/*************************************************************************/
static int ac97StartRecord(AU_CB_FUN_T fnCallBack, INT nSamplingRate, INT nChannels)
{
INT nStatus;
unsigned int i;
ENTER();
if (_bAC97Active & AC97_REC_ACTIVE)
return ERR_AC97_REC_ACTIVE; /* AC97 was recording */
if (_bAC97Active == 0)
{
nStatus = ac97_reset();
if (nStatus < 0)
return nStatus;
}
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) &~RECORD_RIGHT_CHNNEL &~RECORD_LEFT_CHNNEL);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | RECORD_RIGHT_CHNNEL);
if (nChannels != 1) {
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | RECORD_LEFT_CHNNEL);
}
/* enable AC97 record interrupt */
Enable_Int(AU_REC_INT_NUM);
/* set record sampling rate */
ac97SetRecordSampleRate(nSamplingRate);
ac97SetRecordCallBackFunction(fnCallBack);
/* set DMA record destination base address */
AUDIO_WRITE(REG_ACTL_RDSTB, _tAC97.uRecordBufferAddr);
/* set DMA record buffer length */
AUDIO_WRITE(REG_ACTL_RDST_LENGTH, _tAC97.uRecordBufferLength);
/* start recording */
MSG("AC97 start recording...\n");
_bRecDmaToggle = 0;
AUDIO_WRITE(REG_ACTL_RSR, 0x3);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) | AC_RECORD);
_bAC97Active |= AC97_REC_ACTIVE;
LEAVE();
return 0;
}
/*************************************************************************/
/* */
/* FUNCTION */
/* ac97StopRecord */
/* */
/* DESCRIPTION */
/* Stop AC97 record immediately. */
/* */
/* INPUTS */
/* None */
/* */
/* OUTPUTS */
/* None */
/* */
/* RETURN */
/* 0 Success */
/* Otherwise error */
/* */
/*************************************************************************/
static void ac97StopRecord(void)
{
ENTER();
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) & ~(RECORD_RIGHT_CHNNEL | RECORD_LEFT_CHNNEL));
if (!(_bAC97Active & AC97_REC_ACTIVE))
return;
//ac97_read_all_registers ();
/* stop recording */
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) & ~AC_RECORD);
_bAC97Active &= ~AC97_REC_ACTIVE;
/* disable audio record interrupt */
if (!_bAC97Active)
Disable_Int(AU_PLAY_INT_NUM);
LEAVE();
return;
}
static void ac97SetPlayBuffer(UINT32 uDMABufferAddr, UINT32 uDMABufferLength)
{
ENTER();
_tAC97.uPlayBufferAddr = uDMABufferAddr;
_tAC97.uPlayBufferLength = uDMABufferLength;
LEAVE();
}
static void ac97SetRecordBuffer(UINT32 uDMABufferAddr, UINT32 uDMABufferLength)
{
ENTER();
_tAC97.uRecordBufferAddr = uDMABufferAddr;
_tAC97.uRecordBufferLength = uDMABufferLength;
LEAVE();
}
static INT ac97Init(VOID)
{
int nStatus = 0;
ENTER();
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) &~PLAY_LEFT_CHNNEL &~PLAY_RIGHT_CHNNEL);
AUDIO_WRITE(REG_ACTL_RESET, AUDIO_READ(REG_ACTL_RESET) &~RECORD_LEFT_CHNNEL &~RECORD_RIGHT_CHNNEL);
nStatus = ac97_reset();
if (nStatus < 0)
return nStatus;
LEAVE();
return 0;
}
static INT ac97GetCapacity(VOID)
{
return DSP_CAP_DUPLEX; /* support full duplex */
}
WB_AUDIO_CODEC_T wb_ac97_codec = {
dev: AU_DEV_AC97,
get_capacity: ac97GetCapacity,
set_play_buffer: ac97SetPlayBuffer,
set_record_buffer: ac97SetRecordBuffer,
reset: ac97Init,
start_play: ac97StartPlay,
stop_play: ac97StopPlay,
start_record: ac97StartRecord,
stop_record: ac97StopRecord,
set_play_volume: ac97SetPlayVolume,
set_record_volume: ac97SetRecordVolume,
play_interrupt: ac97_play_isr,
record_interrupt: ac97_rec_isr,
};
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