1 files changed, 128 insertions, 0 deletions
diff --git a/os/cerf1110/devcerf.c b/os/cerf1110/devcerf.c
new file mode 100644
index 00000000..3c0fc999
--- /dev/null
+++ b/os/cerf1110/devcerf.c
@@ -0,0 +1,128 @@
+#include	"u.h"
+#include	"../port/lib.h"
+#include	"mem.h"
+#include	"dat.h"
+#include	"fns.h"
+#include	"../port/error.h"
+
+#include "io.h"
+
+
+enum{
+	Qdir,
+	Qled,
+};
+
+static
+Dirtab cerftab[]={
+	".",			{Qdir, 0, QTDIR},	0,	0555,
+	"cerfled",		{Qled, 0},	0,	0660,
+};
+
+static void
+cerfinit(void)						/* default in dev.c */
+{
+	int s;
+
+	s = splhi();
+	GPIOREG->gpdr |= 0xF;
+	GPIOREG->gpsr = 1<<0;	/* we're here */
+	splx(s);
+}
+
+static Chan*
+cerfattach(char* spec)
+{
+	return devattach('T', spec);
+}
+
+static Walkqid*
+cerfwalk(Chan *c, Chan *nc, char **name, int nname)
+{
+	return devwalk(c, nc, name, nname, cerftab, nelem(cerftab), devgen);
+}
+
+static int
+cerfstat(Chan* c, uchar *db, int n)
+{
+	return devstat(c, db, n, cerftab, nelem(cerftab), devgen);
+}
+
+static Chan*
+cerfopen(Chan* c, int omode)
+{
+	return devopen(c, omode, cerftab, nelem(cerftab), devgen);
+}
+
+static void
+cerfclose(Chan* c)
+{
+	USED(c);
+}
+
+static long
+cerfread(Chan* c, void* a, long n, vlong offset)
+{
+	char buf[16];
+
+	switch((ulong)c->qid.path){
+	case Qdir:
+		return devdirread(c, a, n, cerftab, nelem(cerftab), devgen);
+	case Qled:
+		snprint(buf, sizeof(buf), "%2.2lux", GPIOREG->gplr&0xF);
+		return readstr(offset, a, n, buf);
+	default:
+		n=0;
+		break;
+	}
+	return n;
+}
+
+static long
+cerfwrite(Chan* c, void* a, long n, vlong)
+{
+	char buf[16];
+	ulong v;
+
+	switch((ulong)c->qid.path){
+	case Qled:
+		if(n >= sizeof(buf))
+			n = sizeof(buf)-1;
+		memmove(buf, a, n);
+		buf[n] = 0;
+		v = GPIOREG->gplr & 0xF;
+		if(buf[0] == '+')
+			v |= strtoul(buf+1, nil, 0);
+		else if(buf[0] == '-')
+			v &= ~strtoul(buf+1, nil, 0);
+		else
+			v = strtoul(buf, nil, 0);
+		GPIOREG->gpsr = v & 0xF;
+		GPIOREG->gpcr = ~v & 0xF;
+		break;
+	default:
+		error(Ebadusefd);
+	}
+	return n;
+}
+
+Dev cerfdevtab = {
+	'T',
+	"cerf",
+
+	devreset,
+	cerfinit,
+	devshutdown,
+	cerfattach,
+	cerfwalk,
+	cerfstat,
+	cerfopen,
+	devcreate,
+	cerfclose,
+	cerfread,
+	devbread,
+	cerfwrite,
+	devbwrite,
+	devremove,
+	devwstat,
+};