init commit via android 4.4 uboot

1 files changed, 57 insertions, 0 deletions

diff --git a/board/bmw/ns16550.c b/board/bmw/ns16550.c
new file mode 100755
index 0000000..7064567
--- /dev/null
+++ b/board/bmw/ns16550.c
@@ -0,0 +1,57 @@
+/*
+ * COM1 NS16550 support
+ * originally from linux source (arch/ppc/boot/ns16550.c)
+ * modified to use CFG_ISA_MEM and new defines
+ */
+
+#include <config.h>
+#include "ns16550.h"
+
+typedef struct NS16550 *NS16550_t;
+
+const NS16550_t COM_PORTS[] =
+	{ (NS16550_t) ((CFG_EUMB_ADDR) + 0x4500),
+(NS16550_t) ((CFG_EUMB_ADDR) + 0x4600) };
+
+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_RTS;	/* RTS/DTR */
+	com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;	/* Clear & enable FIFOs */
+	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_RTS;	/* RTS/DTR */
+	com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;	/* Clear & enable FIFOs */
+}
+
+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);
+}