1 files changed, 39 insertions, 0 deletions
diff --git a/src/mainboard/hp/abm/bootblock.c b/src/mainboard/hp/abm/bootblock.c
new file mode 100644
index 0000000000..a48ba772e1
--- /dev/null
+++ b/src/mainboard/hp/abm/bootblock.c
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <amdblocks/acpimmio.h>
+#include <bootblock_common.h>
+#include <superio/nuvoton/common/nuvoton.h>
+#include <superio/nuvoton/nct5104d/nct5104d.h>
+
+#define SERIAL_DEV PNP_DEV(0x4E, NCT5104D_SP4)
+
+void bootblock_mainboard_early_init(void)
+{
+	u32 reg32;
+
+	/* Set auxiliary output clock frequency on OSCOUT1 pin to be 25MHz */
+	/* Set auxiliary output clock frequency on OSCOUT2 pin to be 48MHz */
+	reg32 = misc_read32(0x28);
+	reg32 &= 0xffc0ffff; // Clr bits [21:19] & [18:16]
+	reg32 |= 0x00010000; // Set bit 16 for 25MHz
+	misc_write32(0x28, reg32);
+
+	/* Enable Auxiliary OSCOUT1/OSCOUT2 */
+	reg32 = misc_read32(0x40);
+	reg32 &= 0xffffff7b; // clear 2, 7
+	misc_write32(0x40, reg32);
+
+	nct5104d_enable_uartd(SERIAL_DEV);
+	nuvoton_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
+}