📄 ac97.org.c
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void AC97_Port_Init(void)
{
//Push AC97 GPIO port configuration
save_AC97_rGPADAT=rGPADAT;
save_AC97_rGPACON=rGPACON;
save_AC97_rGPAUP=rGPAPU;
//---------------------------------------------------------------------
//PORT E GROUP
//Ports : GPA4 GPA3 GPA2 GPA1 GPA0
//Signal : AC97 SYNC AC97 SDO AC97 SDI AC97 RESETn AC97 BITCLK
//Binary : 11, 11, 11, 11, 11
//---------------------------------------------------------------------
rGPACON = rGPACON & ~(0x3ff) | 0x3ff; //GPE[4:0]=> AC97 function
rGPAPU = rGPAPU & ~(0x1f) | 0x1f; //The pull up function is disabled GPA[4:0] 1 1111
//For EINT0 Push Button
//rGPFUP = ((rGPFUP & ~(1<<0)) | (1<<0)); //GPF0
//rGPFCON = ((rGPFCON & ~(3<<0)) | (1<<1)); //GPF0=EINT0
//rEXTINT0 = ((rEXTINT0 & ~(7<<0)) | (2<<0)); //EINT0=falling edge triggered
}
void AC97_Port_Return(void)
{
//Pop AC97 GPIO port configuration
rGPACON=save_AC97_rGPACON;
rGPADAT=save_AC97_rGPADAT;
rGPAPU=save_AC97_rGPAUP;
}
void AC97_Init(void)
{
int i=0;
unsigned char ch;
printf("\nAC97 Initialization...\n");
//Cold Reset
rAC_GLBCTRL = 0x1; // controller and codec cold reset
Delay(1000); // delay for controller safety reset
rAC_GLBCTRL = 0x0; // controller and codec normal mode
Delay(1000);
rAC_GLBCTRL = 0x1;
Delay(1000);
rAC_GLBCTRL = 0x0;
Delay(1000);
//AC-link On
rAC_GLBCTRL = (1<<2);
Delay(1000);
AC97_Controller_State();
//Transfer data enable using AC-link
rAC_GLBCTRL |= (1<<3); // AC97 Data transfer active
Delay(1000);
AC97_Controller_State();
printf("\nAC97-Link On...\n");
//Codec Ready Check using Codec Ready Interrupt
Codec_Ready_Irq =0;
pISR_PCM_AC97 = (unsigned)AC97_Codec_Ready;
ClearPending(BIT_PCM_AC97);
rSUBSRCPND=(BIT_SUB_AC97);
rINTMSK=~(BIT_PCM_AC97);
rINTSUBMSK=~(BIT_SUB_AC97);
rAC_GLBCTRL |= 0x400000;
while(!Codec_Ready_Irq)
{
printf(".");
Delay(3000);
i++;
if(i==20)
break;
}
printf("\n");
if(i==20)
{
printf("\nAC97 codec is not ready.");
printf("\nCheck on connection between S3C2460 and AC97 CODEC.\n");
printf("\nBye. ");
Codec_Ready = 0;
}
}
void AC97_CodecInit_PD(void)
{
printf("\nAC97 Codec Soft Reset\n");
AC97_Codec_Cmd(0,0x00,0x683F); //Codec Soft Reset : 16bit In/Out (stac9766/67)
printf("AC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
}
void AC97_CodecInit_PCMIn( unsigned short AC97_fs)
{
AC97_Codec_Cmd(0,0x00,0x683F); //codec soft reset
AC97_Codec_Cmd(0,0x26,(1<<9)); //all power on except DAC Block
printf("\nAC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
AC97_Codec_Cmd(0,0x2A,0x0001); //variable rate enable
printf("VRA Enable(1)/Disable(0): 0x%x\n",(0x1&AC97_Codec_Cmd(1,0x2A,0x0001)));
if(AC97_fs==48000){
//ADC Sampling frequency 48kHz
AC97_Codec_Cmd(0,0x32,0xbb80);
}
else if(AC97_fs==44100){
//ADC Sampling frequency 44.1kHz
AC97_Codec_Cmd(0,0x32,0xac44);
}
else if(AC97_fs==22050){
//ADC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x32,0x5622);
}
else if(AC97_fs==8000){
//ADC Sampling frequency 8kHz
AC97_Codec_Cmd(0,0x32,0x1F40);
}
AC97_Codec_Cmd(0,0x10,0x1010); //line in volume on
AC97_Codec_Cmd(0,0x6e,0x0000); //All Analog Mode, ADC Input select => left slot3, right slot4
AC97_Codec_Cmd(0,0x1a,0x0505); //record source select => Stereo Mix
AC97_Codec_Cmd(0,0x1c,0x0909); //record gain is initial
AC97_Codec_Cmd(0,0x78,0x0001); //ADC HPF Bypass
AC97_Codec_Cmd(0,0x20,0x0000); //General Reg.
Input_Volume = AC97_Codec_Cmd(1,0x10,0x0000); //Line In volume
}
void AC97_CodecInit_PCMOut( unsigned short AC97_fs)
{
AC97_Codec_Cmd(0,0x00,0x683F); //codec soft reset
AC97_Codec_Cmd(0,0x2A,0x0001); //variable rate enable
//printf("\nVRA Enable(1)/Disable(0): 0x%x\n", (0x1&AC97_Codec_Cmd(1,0x2A,0x0001)));
if(AC97_fs==48000){
//DAC Sampling frequency 48kHz
AC97_Codec_Cmd(0,0x2C,0xbb80);
}
else if(AC97_fs==44100){
//DAC Sampling frequency 44.1kHz
AC97_Codec_Cmd(0,0x2C,0xac44);
}
else if(AC97_fs==22050){
//DAC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x2C,0x5622);
}
else if(AC97_fs==8000){
//DAC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x2C,0x1F40);
}
AC97_Codec_Cmd(0,0x26, (1<<8)); // all power on except ADC blcok
printf("AC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
AC97_Codec_Cmd(0,0x18,0x0000); // PCM out volume on
AC97_Codec_Cmd(0,0x20,0x0000); // general purpose
AC97_Codec_Cmd(0,0x04,0x1A1A); // Aux out(HP out) volume on
Output_Volume = AC97_Codec_Cmd(1,0x04,0x00000); //HP out volume
}
void AC97_CodecInit_MICIn(unsigned short AC97_fs)
{
AC97_Codec_Cmd(0,0x00,0x683F); //codec soft reset
AC97_Codec_Cmd(0,0x2A,0x0001); //variable rate enable
printf("VRA Enable(1)/Disable(0): 0x%x\n",(0x1&AC97_Codec_Cmd(1,0x2A,0x0001)));
if(AC97_fs==48000){
//ADC Sampling frequency 48kHz
AC97_Codec_Cmd(0,0x32,0xbb80);
}
else if(AC97_fs==44100){
//ADC Sampling frequency 44.1kHz
AC97_Codec_Cmd(0,0x32,0xac44);
}
else if(AC97_fs==22050){
//ADC Sampling frequency 22.05kHz
AC97_Codec_Cmd(0,0x32,0x5622);
}
else if(AC97_fs==8000){
//ADC Sampling frequency 8kHz
AC97_Codec_Cmd(0,0x32,0x1F40);
}
AC97_Codec_Cmd(0,0x26,(1<<9)); //all power on except DAC Block
printf("\nAC97 Codec 0x26 Reg.: 0x%x\n\n", AC97_Codec_Cmd(1,0x26,0x0000));
AC97_Codec_Cmd(0,0x20,0x0000); //MIC1 Selected
AC97_Codec_Cmd(0,0x6e,0x0024); //ADC Input Slot => left slot6, right slot9, MIC GAIN VAL =1
AC97_Codec_Cmd(0,0x0e,0x0040); //BOOSTEN =1
AC97_Codec_Cmd(0,0x1a,0x0000); //Left, Right => MIC
AC97_Codec_Cmd(0,0x1c,0xff);
AC97_Codec_Cmd(0,0x78,0x0001); //ADC HPF Bypass
Input_Volume = AC97_Codec_Cmd(1,0x1c,0x0000); //Record Volume
}
unsigned short AC97_Codec_Cmd(unsigned char CMD_Read, unsigned char CMD_Offset, unsigned short CMD_Data)
{
unsigned short Codec_Stat;
if(CMD_Read == 0)
{
rAC_CODEC_CMD = (0<<23)|(CMD_Offset<<16)|(CMD_Data<<0);
delay_func(2); //32 us delay
}
else if (CMD_Read ==1)
{
rAC_CODEC_CMD = (1<<23)|(CMD_Offset<<16)|(CMD_Data<<0);
Delay(1000);
Codec_Stat = (unsigned short)(rAC_CODEC_STAT & 0xFFFF);
Delay(1000);
return Codec_Stat;
}
else
return 0;
}
void PCM_In_Volume( unsigned char Up_Down_Volume)
{
if( ( Up_Down_Volume == 'u') | (Up_Down_Volume == 'U') )
{
if (Input_Volume == 0x0000)
{
printf("Limit Volume Range!\n");
}
else
{
Input_Volume -= 0x0101;
AC97_Codec_Cmd(0,0x10, Input_Volume); // PCM In Volume Up
printf("PCM In Volume Level : 0x%x\n", Input_Volume);
}
}
if ( ( Up_Down_Volume == 'd') | (Up_Down_Volume == 'D') )
{
if (Input_Volume == 0x1F1F)
{
printf("Limit Volume Range!\n");
}
else
{
Input_Volume += 0x0101;
AC97_Codec_Cmd(0,0x10, Input_Volume); // PCM In Volume Down
printf("PCM In Volume Level : 0x%4x\n", Input_Volume);
}
}
}
void PCM_Out_Volume(unsigned char Up_Down_Volume)
{
if( ( Up_Down_Volume == 'u') | (Up_Down_Volume == 'U') )
{
if (Output_Volume == 0x0000)
{
printf("\nLimit Volume Range!");
}
else
{
Output_Volume -= 0x0101;
AC97_Codec_Cmd(0,0x04, Output_Volume); // PCM out Volume Up
printf("\nHeadphone Volume Level (In AC97 Codec 04h Reg.): 0x%x", Output_Volume);
}
}
if ( ( Up_Down_Volume == 'd') | (Up_Down_Volume == 'D') )
{
if (Output_Volume == 0x1F1F)
{
printf("\nLimit Volume Range!");
}
else
{
Output_Volume += 0x0101;
AC97_Codec_Cmd(0,0x04, Output_Volume); // PCM out Volume Down
printf("\nHeadphone Volume Level (In AC97 Codec 04h Reg.): 0x%x", Output_Volume);
}
}
}
void AC97_PCMout_DMA1(unsigned int PCM_Size)
{
//pISR_EINT0= (unsigned)Muting;
pISR_DMA_SBUS= (unsigned)DMA1_Play_Done;
ClearPending(BIT_DMA_SBUS);
rSUBSRCPND=(BIT_SUB_DMA1);
rINTMSK = ~(BIT_DMA_SBUS);
rINTSUBMSK=~(BIT_SUB_DMA1);
Play_AC97_BUF=(unsigned int *)(DOWN_BUF +0x30);
//DMA Ch1 for PCMInitialize
rDISRC1 = (int)Play_AC97_BUF;
rDISRCC1 = (0<<1) + (0<<0); //The source is in the system bus(AHB), Increment
rDIDST1 = ((unsigned int)0x45000018); //PCM Out Data Fifo
rDIDSTC1 = (1<<1) + (1<<0); //The destination is in the peripheral bus(APB), Fixed
rDCON1 = (1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(0<<22)+(2<<20)+(PCM_Size/4);
rDMASKTRIG1 = (0<<2) + (1<<1) + (1<<0); //No-stop[2], DMA1 channel On[1], No-sw trigger[0]
rDMAREQSEL1 = (6<<1) + (1<<0);
//AC97 Initialize
printf("Connect head-phone plug into speaker-out socket on SMDK2460 and Press any key.\n");
getchar();
printf("Now Play...\n");
printf("To Volume Up, Press the 'u' key.\n");
printf("To Volume Down, Press the 'd' key.\n");
printf("\nIf you want to exit, Press the 'x' key.\n");
printf("Headphone Volume Register = 0x%x\n", Output_Volume);
//Transfer data enable using AC-Link
rAC_GLBCTRL = 0x200C;
//printf("\nWrite Value to AC_GLBCTRL Reg. =>0x200C\n");
//printf("Read Value from AC_GLBCTRL Reg. =>0x%x\n", rAC_GLBCTRL);
Delay(1000);
while(1)
{
//printf("STAT3: 0x%x CURR_TC: 0x%x DCDST3: 0x%x\n", rDSTAT3&0x300000, rDSTAT3&0xfffff, rDCDST3);
Volume_Control=getchar();
if( (Volume_Control == 'x') | (Volume_Control == 'X'))
break;
PCM_Out_Volume(Volume_Control);
}
ClearPending(BIT_DMA_SBUS);
rSUBSRCPND=(BIT_SUB_DMA1);
rDMASKTRIG1 = (1<<2); //DMA1 stop
rINTMSK |= (BIT_DMA_SBUS);
rINTSUBMSK |=(BIT_SUB_DMA1);
//AC97 PCM In Channel Finish
rAC_GLBCTRL &= ~(1<<13); //PCM Out Transfer Mode Off
printf("\nEnd of Play!\n");
}
void AC97_PCMout_INT(unsigned int PCM_Size)
{
//Record AC97_BUF initialize
Rec_AC97_BUF = (unsigned int *)(DOWN_BUF);
Play_AC97_BUF = (Rec_AC97_BUF + 0x30);
End_AC97_BUF = (Rec_AC97_BUF + 0x30 + PCM_Size/4);
//IRQ Initialization
pISR_PCM_AC97= (unsigned)Irq_AC97_PCMout;
printf("\nConnect head-phone plug into speaker-out socket on SMDK2460 and Press any key.\n");
getchar();
printf("\nNow Play...\n");
printf("Headphone Volume Register = 0x%x\n", Output_Volume);
ClearPending(BIT_PCM_AC97);
rSUBSRCPND=(BIT_SUB_AC97);
rINTMSK=~(BIT_PCM_AC97);
rINTSUBMSK=~(BIT_SUB_AC97);
rAC_GLBCTRL = 0x4100C; //PCM Out channel threshold INT enable, PIO Mode On
while(1)
{
if(PCM_Out_INT_Exit == 1)
break;
}
rAC_GLBCTRL &= ~(1<<12); //PCM Out Transfer PIO Mode Off
rINTSUBMSK|=(BIT_SUB_WDT|BIT_SUB_AC97);
rINTMSK|=(BIT_PCM_AC97);
printf("\nEnd of Play!\n");
}
void AC97_PCMin_DMA2(unsigned int PCM_Size)
{
Rec_AC97_BUF = (unsigned int *)(DOWN_BUF);
//IRQ Initialize
pISR_DMA_SBUS = (unsigned)DMA2_Rec_Done;
ClearPending(BIT_DMA_SBUS);
rSUBSRCPND=(BIT_SUB_DMA2);
rINTMSK = ~(BIT_DMA_SBUS);
rINTSUBMSK=~(BIT_SUB_DMA2);
//DMA2 Initialize
rDISRC2 = ((unsigned int)0x45000018); //PCM Input Data FIFO
rDISRCC2 = (1<<1) + (1<<0); //APB, Fix
rDIDST2 = (int)Rec_AC97_BUF; //Record AC97_BUF initializ
rDIDSTC2 = (0<<1) + (0<<0); //AHB, Increment
rDCON2 = (1<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(1<<22)+(2<<20)+(PCM_Size/4);
rDMAREQSEL2 = (7<<1) + (1<<0);
printf("Are you ready to record sound via Line-in socket on SMDK2460?\n");
printf("Press any key to start record.\n");
getchar();
printf("Recording...\n");
rDMASKTRIG2 = (0<<2) + (1<<1) + 0; //No-stop, DMA2 channel on, No-sw trigger
// Transfer data enable using AC-Link
rAC_GLBCTRL = 0x80C; // Transfer data enable using AC-Link
//printf("\nWrite Value to AC_GLBCTRL Reg. =>0x80C\n");
//printf("Read Value from AC_GLBCTRL Reg. =>0x%x\n", rAC_GLBCTRL);
while(AC97_Rec_Done ==0)
{
printf(".");
Delay(3000);
//printf("STAT2: 0x%x CURR_TC: 0x%x DCDST2: 0x%x\n", rDSTAT2&0x300000, rDSTAT2&0xfffff, rDCDST2);
}
AC97_Rec_Done = 0;
ClearPending(BIT_DMA_SBUS);
rSUBSRCPND=(BIT_SUB_DMA2);
rDMASKTRIG2 = (1<<2); //DMA2 stop
rINTMSK |= (BIT_DMA_SBUS);
rINTSUBMSK |=(BIT_SUB_DMA2);
//AC97 PCM In Channel Finish
rAC_GLBCTRL &= ~(1<<11); //PCM In Transfer Mode Off
Delay(1000);
printf("\nEnd of Record!\n");
}
void AC97_PCMin_INT(unsigned int PCM_Size)
{
//Record AC97_BUF initialize
Rec_AC97_BUF = (unsigned int *)(DOWN_BUF);
Play_AC97_BUF = Rec_AC97_BUF + 0x30;
End_AC97_BUF = (Rec_AC97_BUF + 0x30 + PCM_Size/4);
//IRQ Initialization
pISR_PCM_AC97= (unsigned)Irq_AC97_PCMin;
printf("Are you ready to record sound via Line-in socket on SMDK2460?\n");
printf("Press any key to start record.\n");
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