Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / Marvell / common / ns16550.c

diff --git a/qemu/roms/u-boot/board/Marvell/common/ns16550.c b/qemu/roms/u-boot/board/Marvell/common/ns16550.c
new file mode 100644 (file)
index 0000000..7839b68
--- /dev/null
+++ b/qemu/roms/u-boot/board/Marvell/common/ns16550.c
@@ -0,0 +1,66 @@
+/*
+ * COM1 NS16550 support
+ * originally from linux source (arch/powerpc/boot/ns16550.c)
+ * modified to use CONFIG_SYS_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) (CONFIG_SYS_DUART_IO + 0),
+       (NS16550_t) (CONFIG_SYS_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