Can use both clocks of FDI interface on Falcon, plus digital output

libsdl-org · Aug 7, 2005 · 575a1f1 · 575a1f1
1 parent ccea807
commit 575a1f1
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Showing 7 changed files with 39 additions and 45 deletions.
diff --git a/src/audio/mint/SDL_mintaudio.c b/src/audio/mint/SDL_mintaudio.c
@@ -76,7 +76,8 @@ void SDL_MintAudio_Callback(void)
 }
 
 /* Add a new frequency/clock/predivisor to the current list */
-void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock, Uint32 prediv)
+void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock,
+	Uint32 prediv, int gpio_bits)
 {
 	int i, p;
 
@@ -94,16 +95,15 @@ void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock, Uint32 pr
 	/* Put all following ones farer */
 	if (MINTAUDIO_freqcount>0) {
 		for (i=MINTAUDIO_freqcount; i>p; i--) {
-			MINTAUDIO_frequencies[i].frequency = MINTAUDIO_frequencies[i-1].frequency;
-			MINTAUDIO_frequencies[i].masterclock = MINTAUDIO_frequencies[i-1].masterclock;
-			MINTAUDIO_frequencies[i].predivisor = MINTAUDIO_frequencies[i-1].predivisor;
+			memcpy(&MINTAUDIO_frequencies[i], &MINTAUDIO_frequencies[i-1], sizeof(mint_frequency_t));
 		}
 	}
 
 	/* And insert new one */
 	MINTAUDIO_frequencies[p].frequency = frequency;
 	MINTAUDIO_frequencies[p].masterclock = clock;
 	MINTAUDIO_frequencies[p].predivisor = prediv;
+	MINTAUDIO_frequencies[p].gpio_bits = gpio_bits;
 
 	MINTAUDIO_freqcount++;
 }

diff --git a/src/audio/mint/SDL_mintaudio.h b/src/audio/mint/SDL_mintaudio.h
@@ -42,6 +42,7 @@ typedef struct {
 	Uint32	frequency;
 	Uint32	masterclock;
 	Uint32	predivisor;
+	int	gpio_bits;	/* in case of external clock */
 } mint_frequency_t;
 
 struct SDL_PrivateAudioData {
@@ -124,7 +125,8 @@ extern unsigned long SDL_MintAudio_clocktics;
 
 /* Functions */
 void SDL_MintAudio_Callback(void);
-void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock, Uint32 prediv);
+void SDL_MintAudio_AddFrequency(_THIS, Uint32 frequency, Uint32 clock,
+	Uint32 prediv, int gpio_bits);
 int SDL_MintAudio_SearchFrequency(_THIS, int desired_freq);
 
 /* ASM interrupt functions */

diff --git a/src/audio/mint/SDL_mintaudio_dma8.c b/src/audio/mint/SDL_mintaudio_dma8.c
@@ -250,7 +250,8 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 
 	MINTAUDIO_freqcount=0;
 	for (i=sfreq;i<4;i++) {
-		SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)), masterclock, i-sfreq);
+		SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)),
+			masterclock, i-sfreq, -1);
 	}
 
 #if 1

diff --git a/src/audio/mint/SDL_mintaudio_gsxb.c b/src/audio/mint/SDL_mintaudio_gsxb.c
@@ -276,7 +276,9 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 	/* Calculate and select the closest frequency */
 	MINTAUDIO_freqcount=0;
 	for (i=1;i<4;i++) {
-		SDL_MintAudio_AddFrequency(this, MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K, (1<<i)-1);
+		SDL_MintAudio_AddFrequency(this,
+			MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K,
+			(1<<i)-1, -1);
 	}
 
 #if 1

diff --git a/src/audio/mint/SDL_mintaudio_mcsn.c b/src/audio/mint/SDL_mintaudio_mcsn.c
@@ -233,7 +233,7 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 		case MCSN_ST:
 			spec->channels=1;
 			spec->format=8; /* FIXME: is it signed or unsigned ? */
-			SDL_MintAudio_AddFrequency(this, 12500, 0, 0);
+			SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1);
 			break;
 		case MCSN_TT:	/* Also STE, Mega STE */
 			spec->format=AUDIO_S8;
@@ -244,7 +244,8 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 				masterprediv=MASTERPREDIV_TT;
 			}
 			for (i=0; i<4; i++) {
-				SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)), masterclock, 3-i);
+				SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)),
+					masterclock, 3-i, -1);
 			}
 			break;
 		case MCSN_FALCON:	/* Also Mac */
@@ -253,11 +254,13 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 				if ((i==6) || (i==8) || (i==10)) {
 					continue;
 				}
-				SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), CLK25M, i+1);
+				SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)),
+					CLK25M, i+1, -1);
 			}
 			if (cookie_mcsn->res1 != 0) {
 				for (i=1; i<4; i++) {
-					SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)), CLKEXT, (1<<i)-1);
+					SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)),
+						CLKEXT, (1<<i)-1, -1);
 				}
 			}
 			spec->format |= 0x8000;	/* Audio is always signed */

diff --git a/src/audio/mint/SDL_mintaudio_stfa.c b/src/audio/mint/SDL_mintaudio_stfa.c
@@ -213,7 +213,7 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 	/* Check formats available */
 	MINTAUDIO_freqcount=0;
 	for (i=0;i<16;i++) {
-		SDL_MintAudio_AddFrequency(this, freqs[i], 0, i);
+		SDL_MintAudio_AddFrequency(this, freqs[i], 0, i, -1);
 	}
 
 #if 1

diff --git a/src/audio/mint/SDL_mintaudio_xbios.c b/src/audio/mint/SDL_mintaudio_xbios.c
@@ -263,32 +263,29 @@ static void Devconnect2(int src, int dst, int sclk, int pre)
 	Super(oldstack);
 }
 
-static Uint32 Mint_CheckExternalClock(void)
+static void Mint_CheckExternalClock(_THIS)
 {
 #define SIZE_BUF_CLOCK_MEASURE (44100/10)
 
 	unsigned long cookie_snd;
-	Uint32 masterclock;
 	char *buffer;
-	int i;
+	int i, j;
 
 	/* DSP present with its GPIO port ? */
 	if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
-		return 0;
+		return;
 	}
 	if ((cookie_snd & SND_DSP)==0) {
-		return 0;
+		return;
 	}
 
 	buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
 	if (buffer==NULL) {
 		DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
-		return 0;
+		return;
 	}
 	memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
 
-	masterclock=0;
-
 	Buffoper(0);
 	Settracks(0,0);
 	Setmontracks(0);
@@ -313,13 +310,13 @@ static Uint32 Mint_CheckExternalClock(void)
 				khz = ((SIZE_BUF_CLOCK_MEASURE/SDL_MintAudio_clocktics) +1) & 0xFFFFFFFE;
 				DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n", i+1, khz));
 
-				if (i==0) {
-					if(khz==44) {
-						masterclock = MASTERCLOCK_44K;
+				if(khz==44) {
+					for (j=1; j<4; j++) {
+						SDL_MintAudio_AddFrequency(this, MASTERCLOCK_44K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_44K, (1<<j)-1, 2+i);
 					}
-				} else {
-					if(khz==48) {
-						masterclock = MASTERCLOCK_48K;
+				} else if (khz==48) {
+					for (j=1; j<4; j++) {
+						SDL_MintAudio_AddFrequency(this, MASTERCLOCK_48K/(MASTERPREDIV_FALCON*(1<<j)), MASTERCLOCK_48K, (1<<j)-1, 2+i);
 					}
 				}
 			} else {
@@ -331,12 +328,9 @@ static Uint32 Mint_CheckExternalClock(void)
 
 		Buffoper(0);             /* stop */
 		Jdisint(MFP_TIMERA);     /* Uninstall interrupt */
-		if (masterclock == 0)
-			break;
 	}
 
 	Mfree(buffer);
-	return masterclock;
 }
 
 static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
@@ -356,22 +350,18 @@ static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
 		spec->channels=2;	/* 16 bits always stereo */
 	}
 
-	extclock=Mint_CheckExternalClock();
+	MINTAUDIO_freqcount=0;
+
+	/* Add external clocks if present */
+	Mint_CheckExternalClock(this);
 
 	/* Standard clocks */
-	MINTAUDIO_freqcount=0;
 	for (i=1;i<12;i++) {
 		/* Remove unusable Falcon codec predivisors */
 		if ((i==6) || (i==8) || (i==10)) {
 			continue;
 		}
-		SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), MASTERCLOCK_FALCON1, i);
-	}
-
-	if (extclock>0) {
-		for (i=1; i<4; i++) {
-			SDL_MintAudio_AddFrequency(this, extclock/(MASTERPREDIV_FALCON*(1<<i)), extclock, (1<<i)-1);
-		}
+		SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), MASTERCLOCK_FALCON1, i, -1);
 	}
 
 #if 1
@@ -424,14 +414,10 @@ static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
 
 	dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
 	prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
-	if (dmaclock != MASTERCLOCK_FALCON1) {
+	if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
 		Gpio(GPIO_SET,7);		/* DSP port gpio outputs */
-		if (dmaclock == MASTERCLOCK_44K) {
-			Gpio(GPIO_WRITE,2);	/* 22.5792 MHz for 44.1KHz */
-		} else {
-			Gpio(GPIO_WRITE,3);	/* 24.576 MHz for 48KHz */
-		}
-		Devconnect2(DMAPLAY, DAC, CLKEXT, prediv);
+		Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
+		Devconnect2(DMAPLAY, DAC|EXTOUT, CLKEXT, prediv);
 	} else {
 		Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
 	}