20060303

1 files changed, 81 insertions, 0 deletions

diff --git a/os/js/ns16552.h b/os/js/ns16552.h
new file mode 100644
index 00000000..d36e0c4a
--- /dev/null
+++ b/os/js/ns16552.h
@@ -0,0 +1,81 @@
+/*
+ *  Javastation specific code for the ns16552 (really the superio chip,
+ *  but it has a serial port that looks like the ns16552).
+ */
+enum
+{
+	UartFREQ= 1843200,
+	TTYABase = 0x2F8
+};
+
+#define uartwrreg(u,r,v)	outb((u)->port + r, (u)->sticky[r] | (v))
+#define uartrdreg(u,r)		inb((u)->port + r)
+
+void	ns16552setup(ulong, ulong, char*);
+
+static void
+uartpower(int, int)
+{
+}
+
+/*
+ *  handle an interrupt to a single uart
+ */
+static void
+ns16552intrx(Ureg *ur, void *arg)
+{
+	USED(ur);
+
+	ns16552intr((ulong)arg);
+}
+
+/*
+ *  install the uarts (called by reset)
+ */
+void
+ns16552install(void)
+{
+	static int already;
+	void uartclock(void);
+
+	if(already)
+		return;
+	already = 1;
+
+	/* first two ports are always there and always the normal frequency */
+	ns16552setup(superiova()+TTYABase, UartFREQ, "eia0");
+	ns16552special(0, 38400, &kbdq, &printq, kbdputc);
+	addclock0link(uartclock, 22);
+}
+
+/*
+ * If the UART's receiver can be connected to a DMA channel,
+ * this function does what is necessary to create the
+ * connection and returns the DMA channel number.
+ * If the UART's receiver cannot be connected to a DMA channel,
+ * a -1 is returned.
+ */
+char
+ns16552dmarcv(int dev)
+{
+ 
+	USED(dev);
+        return -1;
+}
+
+long
+dmasetup(int,void*,long,int)
+{
+	return 0;
+}
+
+void
+dmaend(int)
+{
+}
+
+int
+dmacount(int)
+{
+	return 0;
+}