superio/nuvoton: add common HWM bank select function

Change-Id: I828b6caa37e52c13e1876c7ca4edbd171e70d3f7
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37945
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 58 insertions, 0 deletions

diff --git a/src/superio/nuvoton/common/Kconfig b/src/superio/nuvoton/common/Kconfig
index 0af671f512..0af556caab 100644
--- a/src/superio/nuvoton/common/Kconfig
+++ b/src/superio/nuvoton/common/Kconfig
@@ -17,3 +17,7 @@
 # pre-ram.
 config SUPERIO_NUVOTON_COMMON_PRE_RAM
 	bool
+
+# Generic Nuvoton HWM driver
+config SUPERIO_NUVOTON_COMMON_HWM
+	bool
diff --git a/src/superio/nuvoton/common/hwm.c b/src/superio/nuvoton/common/hwm.c
new file mode 100644
index 0000000000..bfc916fedc
--- /dev/null
+++ b/src/superio/nuvoton/common/hwm.c
@@ -0,0 +1,28 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Felix Held <felix-coreboot@felixheld.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.
+ */
+
+/* Nuvoton is a Winbond spin-off, so this code is for both */
+
+#include <stdint.h>
+#include <superio/hwm5_conf.h>
+#include "hwm.h"
+
+#define HWM_BANK_SELECT	0x4e
+
+void nuvoton_hwm_select_bank(const u16 base, const u8 bank)
+{
+	pnp_write_hwm5_index(base, HWM_BANK_SELECT, bank);
+}
diff --git a/src/superio/nuvoton/common/hwm.h b/src/superio/nuvoton/common/hwm.h
new file mode 100644
index 0000000000..15dcf62448
--- /dev/null
+++ b/src/superio/nuvoton/common/hwm.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Felix Held <felix-coreboot@felixheld.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.
+ */
+
+#ifndef SUPERIO_NUVOTON_COMMON_HWM_H
+#define SUPERIO_NUVOTON_COMMON_HWM_H
+
+/* Nuvoton is a Winbond spin-off, so this code is for both */
+
+#include <stdint.h>
+
+void nuvoton_hwm_select_bank(const u16 base, const u8 bank);
+
+#endif /* SUPERIO_NUVOTON_COMMON_HWM_H */