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-rw-r--r--board/Marvell/common/ns16550.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/board/Marvell/common/ns16550.c b/board/Marvell/common/ns16550.c
new file mode 100644
index 0000000..475445b
--- /dev/null
+++ b/board/Marvell/common/ns16550.c
@@ -0,0 +1,66 @@
+/*
+ * COM1 NS16550 support
+ * originally from linux source (arch/ppc/boot/ns16550.c)
+ * modified to use CFG_ISA_MEM and new defines
+ *
+ * further modified by Josh Huber <huber@mclx.com> to support
+ * the DUART on the Galileo Eval board. (db64360)
+ */
+
+#include <config.h>
+#include "ns16550.h"
+
+#ifdef ZUMA_NTL
+/* no 16550 device */
+#else
+const NS16550_t COM_PORTS[] = { (NS16550_t) (CFG_DUART_IO + 0),
+ (NS16550_t) (CFG_DUART_IO + 0x20)
+};
+
+volatile struct NS16550 *NS16550_init (int chan, int baud_divisor)
+{
+ volatile struct NS16550 *com_port;
+
+ com_port = (struct NS16550 *) COM_PORTS[chan];
+ com_port->ier = 0x00;
+ com_port->lcr = LCR_BKSE; /* Access baud rate */
+ com_port->dll = baud_divisor & 0xff; /* 9600 baud */
+ com_port->dlm = (baud_divisor >> 8) & 0xff;
+ com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
+ com_port->mcr = MCR_DTR | MCR_RTS; /* RTS/DTR */
+
+ /* Clear & enable FIFOs */
+ com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;
+ return (com_port);
+}
+
+void NS16550_reinit (volatile struct NS16550 *com_port, int baud_divisor)
+{
+ com_port->ier = 0x00;
+ com_port->lcr = LCR_BKSE; /* Access baud rate */
+ com_port->dll = baud_divisor & 0xff; /* 9600 baud */
+ com_port->dlm = (baud_divisor >> 8) & 0xff;
+ com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
+ com_port->mcr = MCR_DTR | MCR_RTS; /* RTS/DTR */
+
+ /* Clear & enable FIFOs */
+ com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;
+}
+
+void NS16550_putc (volatile struct NS16550 *com_port, unsigned char c)
+{
+ while ((com_port->lsr & LSR_THRE) == 0);
+ com_port->thr = c;
+}
+
+unsigned char NS16550_getc (volatile struct NS16550 *com_port)
+{
+ while ((com_port->lsr & LSR_DR) == 0);
+ return (com_port->rbr);
+}
+
+int NS16550_tstc (volatile struct NS16550 *com_port)
+{
+ return ((com_port->lsr & LSR_DR) != 0);
+}
+#endif