Better stab at MD code for pc98. The 8251 stuff is a total lie

(ns8250 copied and s/ns8250/i8251/g), but there for linkage purposes.
Real code to follow, once I get past some boot issues on my pc98 boxes
with recent current.

1 files changed, 96 insertions, 0 deletions

diff --git a/sys/dev/uart/uart_cpu_pc98.c b/sys/dev/uart/uart_cpu_pc98.c
new file mode 100644
index 0000000..ab7f0b7
--- /dev/null
+++ b/sys/dev/uart/uart_cpu_pc98.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2003 M. Warner Losh, Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_cpu.h>
+
+int
+uart_cpu_getdev(int devtype, struct uart_devinfo *di)
+{
+	unsigned int i, ivar, flags;
+
+	/*
+	 * There are 2 built-in serial ports on pc98 hardware.  The 
+	 * first one is 8251 and the second one is I think an enhance
+	 * version of that.  However, for sio flags told the story
+	 * so make a lame attempt to sort this out.
+	 */
+	for (i = 0; i < 1; i++) {
+		if (resource_int_value("uart", i, "flags", &flags))
+			continue;
+		if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(flags))
+			continue;
+		if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(flags))
+			continue;
+		/*
+		 * We have a possible device. Make sure it's enabled and
+		 * that we have an I/O port.
+		 */
+		if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
+		    ivar != 0)
+			continue;
+		if (resource_int_value("uart", i, "port", &ivar) != 0 ||
+		    ivar == 0)
+			continue;
+		/*
+		 * Got it. Fill in the instance and return it. We have
+		 * both i8251 an ns8250 and successors on pc98.
+		 */
+		if (flags & 0x100)
+			di->ops = uart_ns8250_ops;
+		else
+			di->ops = uart_i8251_ops;
+		di->bas.bst = I386_BUS_SPACE_IO;
+		di->bas.bsh = ivar;
+		di->bas.regshft = 0;
+		di->bas.rclk = 0;
+		if (resource_int_value("uart", i, "baud", &ivar) != 0)
+			ivar = 0;
+		di->baudrate = ivar;
+		di->databits = 8;
+		di->stopbits = 1;
+		di->parity = UART_PARITY_NONE;
+		return (0);
+	}
+
+	return (ENXIO);
+}
+
+int
+uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
+{
+
+	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
+}