[Arg! Forgot to 'svn add', sorry]

Generic driver for pretty much all known Standard Microsystems Corporation
(SMSC) Super I/O chips.

Most of the SMSC Super I/O chips seem to be similar enough (for our
purposes) so that we can handle them with a unified driver.

So far only the ASUS A8000 has been tested on real hardware!

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Corey Osgood <corey.osgood@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2734 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 45 insertions, 0 deletions

diff --git a/src/superio/smsc/smscsuperio/smscsuperio_early_serial.c b/src/superio/smsc/smscsuperio/smscsuperio_early_serial.c
new file mode 100644
index 0000000000..3bc14bfccb
--- /dev/null
+++ b/src/superio/smsc/smscsuperio/smscsuperio_early_serial.c
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the LinuxBIOS project.
+ *
+ * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <arch/romcc_io.h>
+
+/* All known/supported SMSC Super I/Os have the same logical device IDs
+ * for the serial ports (COM1, COM2).
+ */
+#define SMSCSUPERIO_SP1 4	/* Com1 */
+#define SMSCSUPERIO_SP2 5	/* Com2 */
+
+/**
+ * Enable the specified serial port.
+ *
+ * @param dev The device to use.
+ * @param dev The I/O base of the serial port (usually 0x3f8/0x2f8).
+ */
+static inline void smscsuperio_enable_serial(device_t dev, uint16_t iobase)
+{
+	uint16_t port = dev >> 8;
+
+	outb(0x55, port);		/* Enter the configuration state. */
+	pnp_set_logical_device(dev);
+	pnp_set_enable(dev, 0);
+	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
+	pnp_set_enable(dev, 1);
+	outb(0xaa, port);		/* Exit the configuration state. */
+}