From 8ad4879fe4ac817e5f57530c5fa62105cde9646a Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 13 Nov 2000 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2000-11-13

---
 bitsy/devuda1341.c | 9 ++++++++-
 bitsy/sa1110dma.c  | 5 +++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/bitsy/devuda1341.c b/bitsy/devuda1341.c
index d4b0cc71a07fefbaf862d0fb10cbee5470da352f..9d2d9a2217ae390a65f69f70a82ae5137ab70810 100644
--- a/bitsy/devuda1341.c
+++ b/bitsy/devuda1341.c
@@ -19,6 +19,8 @@
 #include	"io.h"
 #include	"sa1110dma.h"
 
+static int debug = 1;
+
 /*
  * GPIO based L3 bus support.
  *
@@ -375,6 +377,7 @@ bufinit(IOstate *b)
 {
 	int i;
 
+	if (debug) print("#A: bufinit\n");
 	for (i = 0; i < Nbuf; i++)
 		b->buf[i].virt = xalloc(Bufsize);
 	b->bufinit = 1;
@@ -385,6 +388,7 @@ setempty(IOstate *b)
 {
 	int i;
 
+	if (debug) print("#A: setempty\n");
 	for (i = 0; i < Nbuf; i++) {
 		b->buf[i].nbytes = 0;
 	}
@@ -492,12 +496,13 @@ audioenable(void)
 	data[1] = 0xe0 | 0<<2 | 3;	/* agc time constant and output level */
 	L3_write(UDA1341_L3Addr<<2 | UDA1341_DATA0, data, 2 );
 
-	print("audio enabled\n");
+	if (debug) print("#A: audio enabled\n");
 }
 
 static void
 sendaudio(IOstate *b) {
 	/* call this with lock held */
+	if (debug) print("#A: sendaudio\n");
 	while (b->next != b->filling) {
 		assert(b->next->nbytes);
 		if (dmastart(b->dma, b->next->virt, b->next->nbytes) == 0)
@@ -594,6 +599,7 @@ audioopen(Chan *c, int omode)
 		}
 		qunlock(&audio);
 //		mxvolume();
+		if (debug) print("#A: open done\n");
 		break;
 	}
 	c = devopen(c, omode, audiodir, nelem(audiodir), devgen);
@@ -820,6 +826,7 @@ audiowrite(Chan *c, void *vp, long n, vlong)
 		break;
 
 	case Qaudio:
+		if (debug) print("#A: write %ld\n", n);
 		if((audio.amode & Awrite) == 0)
 			error(Emode);
 		a = &audio.o;
diff --git a/bitsy/sa1110dma.c b/bitsy/sa1110dma.c
index 368c3863d3a6ce00062e604a0b7385e651206ee1..33691eb544007cd3f97fb429a30314e86f6bf9c0 100644
--- a/bitsy/sa1110dma.c
+++ b/bitsy/sa1110dma.c
@@ -7,6 +7,8 @@
 #include	"../port/error.h"
 #include	"sa1110dma.h"
 
+static int debug = 1;
+
 /*
  *	DMA helper routines
  */
@@ -78,6 +80,7 @@ int
 dmaalloc(int rd, int bigendian, int burstsize, int datumsize, int device, ulong port, void (*intr)(void*, ulong), void *param) {
 	int i;
 
+	if (debug) print("dma: dmaalloc\n");
 	lock(&dma);
 	for (i = 0; i < NDMA; i++) {
 		if (dma.chan[i].inuse)
@@ -114,6 +117,7 @@ ulong
 dmastart(int chan, void *addr, int count) {
 	ulong status;
 
+	if (debug) print("dma: dmastart\n");
 	if (((status = dmaregs[chan].dcsr_rd) & ((1<<DONEA)|(1<<DONEB))) == 0)
 		return 0;
 
@@ -174,6 +178,7 @@ dmaintr(Ureg*, void *x)
 	struct dmaregs *regs = x;
 	ulong dcsr;
 
+	if (debug) print("dma: interrupt\n");
 	i = regs - dmaregs;
 	if ((dcsr = regs->dcsr_rd) & (1<<DONEA | 1<<DONEB | 1<<ERROR)) {
 		wakeup(&dma.chan[i].r);