1 files changed, 60 insertions, 0 deletions
diff --git a/src/superio/intel/i8900/i8900.h b/src/superio/intel/i8900/i8900.h
new file mode 100644
index 0000000000..e53a0a86e1
--- /dev/null
+++ b/src/superio/intel/i8900/i8900.h
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008 Arastra, 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
+ */
+
+#ifndef SUPERIO_INTEL_I8900_I8900_H
+#define SUPERIO_INTEL_I8900_I8900_H
+
+/*
+ * The SIW ("Serial I/O and Watchdog Timer") integrated into the i8900 is
+ * very similar to a Super I/O, both in functionality and config mechanism.
+ *
+ * The SIW contains:
+ *  - UART(s)
+ *  - Serial interrupt controller
+ *  - Watchdog timer (WDT)
+ *  - LPC interface
+ */
+
+/* Logical device numbers (LDNs). */
+#define I8900_SP1 0x04 /* Com1 */
+#define I8900_SP2 0x05 /* Com2 */
+#define I8900_WDT 0x06 /* Watchdog timer */
+
+/* Registers and bit definitions: */
+
+#define I8900_SIW_CONFIGURATION		0x29
+
+/*
+ * SIW_CONFIGURATION[3:2] = UART_CLK predivide
+ * 00: divide by 1
+ * 01: divide by 8
+ * 10: divide by 26
+ * 11: reserved
+ */
+#define I8900_UART_CLK_PREDIVIDE_1	0x00
+#define I8900_UART_CLK_PREDIVIDE_8	0x01
+#define I8900_UART_CLK_PREDIVIDE_26	0x02
+#define I8900_ENABLE_SIRQ		0x01
+
+void i8900_configure_uart_clk(device_t dev, u8 predivide);
+void i8900_enable_serial(device_t dev, u16 iobase);
+void i8900_enable_wdt(device_t dev, u16 iobase);
+
+#endif