superio/fintek/*: Factor out generic romstage component

The romstage of Fintek Super I/O's is identical, leading to replication
of essentially the same code prone to bitrot. Herein we consolidate the
early pre-ram UART initialisation code into fintek/common, rather we
leave the exceptions to be implemented under model/.

More precisely we provide a well documented version of early_serial.c
under fintek/common and select by way of Kconfig as a generic romstage
component to Super I/O support. We leave future Super I/O's the option
to implement `non-standard` initialisation code should such a (unlikely)
need araise. A primary advantage is that new support for romstage serial
is now trival to add. We also provide some Kconfig documentation while
here.

Change-Id: I3c62561558a62ece944a167ba302fb7076bba001
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5575
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

23 files changed, 53 insertions, 305 deletions

diff --git a/src/superio/fintek/Kconfig b/src/superio/fintek/Kconfig
index 938494adbe..f5778980cd 100644
--- a/src/superio/fintek/Kconfig
+++ b/src/superio/fintek/Kconfig
@@ -2,6 +2,7 @@
 ## This file is part of the coreboot project.
 ##
 ## Copyright (C) 2009 Ronald G. Minnich
+## Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
 ##
 ## 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
@@ -17,17 +18,35 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+# Generic Fintek romstage driver - Just enough UART initialisation code for
+# romstage.
+config SUPERIO_FINTEK_COMMON_ROMSTAGE
+	bool
+
 config SUPERIO_FINTEK_F71805F
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
+
 config SUPERIO_FINTEK_F71859
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
+
 config SUPERIO_FINTEK_F71863FG
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
+
 config SUPERIO_FINTEK_F71869AD
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
+
 config SUPERIO_FINTEK_F71872
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
+
 config SUPERIO_FINTEK_F71889
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
+
 config SUPERIO_FINTEK_F81865F
 	bool
+	select SUPERIO_FINTEK_COMMON_ROMSTAGE
diff --git a/src/superio/fintek/Makefile.inc b/src/superio/fintek/Makefile.inc
index 541a893fd2..1b11336360 100644
--- a/src/superio/fintek/Makefile.inc
+++ b/src/superio/fintek/Makefile.inc
@@ -17,6 +17,9 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+## include generic fintek pre-ram stage driver
+romstage-$(CONFIG_SUPERIO_FINTEK_COMMON_ROMSTAGE) += common/early_serial.c
+
 subdirs-y += f71805f
 subdirs-y += f71859
 subdirs-y += f71863fg
diff --git a/src/superio/fintek/f71869ad/early_serial.c b/src/superio/fintek/common/early_serial.c
index 85184007ac..d74b786d50 100644
--- a/src/superio/fintek/f71869ad/early_serial.c
+++ b/src/superio/fintek/common/early_serial.c
@@ -19,45 +19,49 @@
  */
 
 /*
- * Pre-RAM driver for the Fintek F71869AD Super I/O chip.
+ * A generic romstage (pre-ram) driver for Fintek variant Super I/O chips.
  *
- * Derived from p.34 in vendor data-sheet:
+ * The following is derived directly from the vendor Fintek's data-sheets:
  *
- * - default index port : 0x4E
- * - default data  port : 0x4F
+ * To toggle between `configuration mode` and `normal operation mode` as to
+ * manipulation the various LDN's in Fintek Super I/O's we are required to pass
+ * magic numbers `passwords keys`.
  *
- * - enable  configuration : 0x87
- * - disable configuration : 0xAA
+ *  FINTEK_ENTRY_KEY :=  enable  configuration : 0x87
+ *  FINTEK_EXIT_KEY  :=  disable configuration : 0xAA
+ *
+ * To modify a LDN's configuration register, we use the index port to select
+ * the index of the LDN and then writing to the data port to alter the
+ * parameters. A default index, data port pair is 0x4E, 0x4F respectively, a
+ * user modified pair is 0x2E, 0x2F respectively.
  *
  */
 
 #include <arch/io.h>
 #include <device/pnp.h>
-#include "f71869ad.h"
+#include <stdint.h>
+#include "fintek.h"
 
-/*
- * Enable configuration: pass entry key '0x87' into index port dev.
- */
+#define FINTEK_ENTRY_KEY 0x87
+#define FINTEK_EXIT_KEY 0xAA
+
+/* Enable configuration: pass entry key '0x87' into index port dev. */
 static void pnp_enter_conf_state(device_t dev)
 {
 	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
+	outb(FINTEK_ENTRY_KEY, port);
+	outb(FINTEK_ENTRY_KEY, port);
 }
 
-/*
- * Disable configuration: pass exit key '0xAA' into index port dev.
- */
+/* Disable configuration: pass exit key '0xAA' into index port dev. */
 static void pnp_exit_conf_state(device_t dev)
 {
 	u16 port = dev >> 8;
-	outb(0xaa, port);
+	outb(FINTEK_EXIT_KEY, port);
 }
 
-/*
- * Bring up early serial debugging output before the RAM is initialized.
- */
-void f71869ad_enable_serial(device_t dev, u16 iobase)
+/* Bring up early serial debugging output before the RAM is initialized. */
+void fintek_enable_serial(device_t dev, u16 iobase)
 {
 	pnp_enter_conf_state(dev);
 	pnp_set_logical_device(dev);
diff --git a/src/superio/fintek/f71889/early_serial.c b/src/superio/fintek/common/fintek.h
index 5e11474dd6..a08cf92264 100644
--- a/src/superio/fintek/f71889/early_serial.c
+++ b/src/superio/fintek/common/fintek.h
@@ -1,7 +1,7 @@
 /*
  * This file is part of the coreboot project.
  *
- * Copyright (C) 2010 Alec Ari <neotheuser@ymail.com>
+ * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
  *
  * 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
@@ -18,29 +18,12 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include <arch/io.h>
-#include <device/pnp.h>
-#include "f71889.h"
+#ifndef SUPERIO_FINTEK_COMMON_ROMSTAGE_H
+#define SUPERIO_FINTEK_COMMON_ROMSTAGE_H
 
-static void pnp_enter_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
-}
+#include <arch/io.h>
+#include <stdint.h>
 
-static void pnp_exit_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0xaa, port);
-}
+void fintek_enable_serial(device_t dev, u16 iobase);
 
-void f71889_enable_serial(device_t dev, u16 iobase)
-{
-	pnp_enter_conf_state(dev);
-	pnp_set_logical_device(dev);
-	pnp_set_enable(dev, 0);
-	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
-	pnp_set_enable(dev, 1);
-	pnp_exit_conf_state(dev);
-}
+#endif /* SUPERIO_FINTEK_COMMON_ROMSTAGE_H */
diff --git a/src/superio/fintek/f71805f/Makefile.inc b/src/superio/fintek/f71805f/Makefile.inc
index 22c01e059c..4a137992f7 100644
--- a/src/superio/fintek/f71805f/Makefile.inc
+++ b/src/superio/fintek/f71805f/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F71805F) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F71805F) += superio.c
diff --git a/src/superio/fintek/f71805f/early_serial.c b/src/superio/fintek/f71805f/early_serial.c
deleted file mode 100644
index b823a430e5..0000000000
--- a/src/superio/fintek/f71805f/early_serial.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.com>
- *
- * 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
- */
-
-/* Pre-RAM driver for the Fintek F71805F/FG Super I/O chip. */
-
-#include <arch/io.h>
-#include <device/pnp.h>
-#include "f71805f.h"
-
-static void pnp_enter_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
-}
-
-static void pnp_exit_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0xaa, port);
-}
-
-void f71805f_enable_serial(device_t dev, u16 iobase)
-{
-	pnp_enter_conf_state(dev);
-	pnp_set_logical_device(dev);
-	pnp_set_enable(dev, 0);
-	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
-	pnp_set_enable(dev, 1);
-	pnp_exit_conf_state(dev);
-}
diff --git a/src/superio/fintek/f71805f/f71805f.h b/src/superio/fintek/f71805f/f71805f.h
index 1033ea2de6..82f3869731 100644
--- a/src/superio/fintek/f71805f/f71805f.h
+++ b/src/superio/fintek/f71805f/f71805f.h
@@ -38,6 +38,4 @@
 #define F71805F_GPIO	0x06	/* General Purpose I/O (GPIO) */
 #define F71805F_PME	0x0a	/* Power Management Events (PME) */
 
-void f71805f_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F71805F_H */
diff --git a/src/superio/fintek/f71859/Makefile.inc b/src/superio/fintek/f71859/Makefile.inc
index 885881163e..fa63a1bd58 100644
--- a/src/superio/fintek/f71859/Makefile.inc
+++ b/src/superio/fintek/f71859/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F71859) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F71859) += superio.c
diff --git a/src/superio/fintek/f71859/early_serial.c b/src/superio/fintek/f71859/early_serial.c
deleted file mode 100644
index cb0d3dec02..0000000000
--- a/src/superio/fintek/f71859/early_serial.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2010 Marc Jones <marcj303@gmail.com>
- *
- * 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
- */
-
-/* Pre-RAM driver for the Fintek F71859 Super I/O chip. */
-
-#include <arch/io.h>
-#include <device/pnp.h>
-#include "f71859.h"
-
-static void pnp_enter_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
-}
-
-static void pnp_exit_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0xaa, port);
-}
-
-void f71859_enable_serial(device_t dev, u16 iobase)
-{
-	pnp_enter_conf_state(dev);
-	pnp_set_logical_device(dev);
-	pnp_set_enable(dev, 0);
-	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
-	pnp_set_enable(dev, 1);
-	pnp_exit_conf_state(dev);
-}
diff --git a/src/superio/fintek/f71859/f71859.h b/src/superio/fintek/f71859/f71859.h
index ab114a4540..f0111bdc2e 100644
--- a/src/superio/fintek/f71859/f71859.h
+++ b/src/superio/fintek/f71859/f71859.h
@@ -24,6 +24,4 @@
 /* Logical Device Numbers (LDN). */
 #define F71859_SP1	0x03	/* UART1 */
 
-void f71859_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F71859_H */
diff --git a/src/superio/fintek/f71863fg/Makefile.inc b/src/superio/fintek/f71863fg/Makefile.inc
index 85ec530ccb..e48b93a3d4 100644
--- a/src/superio/fintek/f71863fg/Makefile.inc
+++ b/src/superio/fintek/f71863fg/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F71863FG) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F71863FG) += superio.c
diff --git a/src/superio/fintek/f71863fg/early_serial.c b/src/superio/fintek/f71863fg/early_serial.c
deleted file mode 100644
index 251f298c19..0000000000
--- a/src/superio/fintek/f71863fg/early_serial.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.com>
- *
- * 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
- */
-
-/* Pre-RAM driver for the Fintek F71863FG Super I/O chip. */
-
-#include <arch/io.h>
-#include <device/pnp.h>
-#include "f71863fg.h"
-
-static void pnp_enter_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
-}
-
-static void pnp_exit_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0xaa, port);
-}
-
-void f71863fg_enable_serial(device_t dev, u16 iobase)
-{
-	pnp_enter_conf_state(dev);
-	pnp_set_logical_device(dev);
-	pnp_set_enable(dev, 0);
-	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
-	pnp_set_enable(dev, 1);
-	pnp_exit_conf_state(dev);
-}
diff --git a/src/superio/fintek/f71863fg/f71863fg.h b/src/superio/fintek/f71863fg/f71863fg.h
index c29ddbe05e..a11e69f59b 100644
--- a/src/superio/fintek/f71863fg/f71863fg.h
+++ b/src/superio/fintek/f71863fg/f71863fg.h
@@ -33,6 +33,4 @@
 #define F71863FG_SPI	0x08	/* SPI */
 #define F71863FG_PME	0x0a	/* Power Management Events (PME) and ACPI */
 
-void f71863fg_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F71863FG_H */
diff --git a/src/superio/fintek/f71869ad/Makefile.inc b/src/superio/fintek/f71869ad/Makefile.inc
index 12efbebeb8..117239a2bf 100644
--- a/src/superio/fintek/f71869ad/Makefile.inc
+++ b/src/superio/fintek/f71869ad/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F71869AD) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F71869AD) += superio.c
diff --git a/src/superio/fintek/f71869ad/f71869ad.h b/src/superio/fintek/f71869ad/f71869ad.h
index 43a4397451..3aeac56b82 100644
--- a/src/superio/fintek/f71869ad/f71869ad.h
+++ b/src/superio/fintek/f71869ad/f71869ad.h
@@ -32,6 +32,4 @@
 #define F71869AD_BSEL   0x07	/* BSEL */
 #define F71869AD_PME    0x0a	/* Power Management Events (PME) and ACPI */
 
-void f71869ad_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F71869AD_H */
diff --git a/src/superio/fintek/f71872/Makefile.inc b/src/superio/fintek/f71872/Makefile.inc
index 58ba5d562a..ed40eb0ab5 100644
--- a/src/superio/fintek/f71872/Makefile.inc
+++ b/src/superio/fintek/f71872/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F71872) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F71872) += superio.c
diff --git a/src/superio/fintek/f71872/early_serial.c b/src/superio/fintek/f71872/early_serial.c
deleted file mode 100644
index bbfc26430a..0000000000
--- a/src/superio/fintek/f71872/early_serial.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.com>
- *
- * 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
- */
-
-/* Pre-RAM driver for the Fintek F71872F/FG Super I/O chip. */
-
-#include <arch/io.h>
-#include <device/pnp.h>
-#include "f71872.h"
-
-static void pnp_enter_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
-}
-
-static void pnp_exit_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0xaa, port);
-}
-
-void f71872_enable_serial(device_t dev, u16 iobase)
-{
-	pnp_enter_conf_state(dev);
-	pnp_set_logical_device(dev);
-	pnp_set_enable(dev, 0);
-	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
-	pnp_set_enable(dev, 1);
-	pnp_exit_conf_state(dev);
-}
diff --git a/src/superio/fintek/f71872/f71872.h b/src/superio/fintek/f71872/f71872.h
index fb8076248a..629d42deb8 100644
--- a/src/superio/fintek/f71872/f71872.h
+++ b/src/superio/fintek/f71872/f71872.h
@@ -32,6 +32,4 @@
 #define F71872_VID	0x07	/* VID */
 #define F71872_PM	0x0a	/* ACPI/PME */
 
-void f71872_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F71872_H */
diff --git a/src/superio/fintek/f71889/Makefile.inc b/src/superio/fintek/f71889/Makefile.inc
index 986414080b..5c39860b51 100644
--- a/src/superio/fintek/f71889/Makefile.inc
+++ b/src/superio/fintek/f71889/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F71889) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F71889) += superio.c
diff --git a/src/superio/fintek/f71889/f71889.h b/src/superio/fintek/f71889/f71889.h
index 72148f4f62..e46ab99ac7 100644
--- a/src/superio/fintek/f71889/f71889.h
+++ b/src/superio/fintek/f71889/f71889.h
@@ -34,6 +34,4 @@
 #define F71889_PME	0x0a	/* Power Management Events (PME) and ACPI */
 #define F71889_VREF	0x0b	/* Vref */
 
-void f71889_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F71889_H */
diff --git a/src/superio/fintek/f81865f/Makefile.inc b/src/superio/fintek/f81865f/Makefile.inc
index 8afb2860ca..1700f7c272 100644
--- a/src/superio/fintek/f81865f/Makefile.inc
+++ b/src/superio/fintek/f81865f/Makefile.inc
@@ -18,5 +18,4 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
-romstage-$(CONFIG_SUPERIO_FINTEK_F81865F) += early_serial.c
 ramstage-$(CONFIG_SUPERIO_FINTEK_F81865F) += superio.c
diff --git a/src/superio/fintek/f81865f/early_serial.c b/src/superio/fintek/f81865f/early_serial.c
deleted file mode 100644
index 29b5f9d658..0000000000
--- a/src/superio/fintek/f81865f/early_serial.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2011 Advanced Micro Devices, Inc.
- *
- * 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
- */
-
-/* Pre-RAM driver for the Fintek F81865F/FG Super I/O chip. */
-
-#include <arch/io.h>
-#include <device/pnp.h>
-#include "f81865f.h"
-
-static void pnp_enter_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0x87, port);
-	outb(0x87, port);
-}
-
-static void pnp_exit_conf_state(device_t dev)
-{
-	u16 port = dev >> 8;
-	outb(0xaa, port);
-}
-
-void f81865f_enable_serial(device_t dev, u16 iobase)
-{
-	pnp_enter_conf_state(dev);
-	pnp_set_logical_device(dev);
-	pnp_set_enable(dev, 0);
-	pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
-	pnp_set_enable(dev, 1);
-	pnp_exit_conf_state(dev);
-}
diff --git a/src/superio/fintek/f81865f/f81865f.h b/src/superio/fintek/f81865f/f81865f.h
index 99b769884d..e3c204acf7 100644
--- a/src/superio/fintek/f81865f/f81865f.h
+++ b/src/superio/fintek/f81865f/f81865f.h
@@ -35,6 +35,4 @@
 #define F81865F_GPIO	0x06	/* General Purpose I/O (GPIO) */
 #define F81865F_PME	0x0a	/* Power Management Events (PME) */
 
-void f81865f_enable_serial(device_t dev, u16 iobase);
-
 #endif /* SUPERIO_FINTEK_F81865_H */