diff options
| author | Marc Jones <marc.jones@se-eng.com> | 2015-09-23 16:19:11 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2015-11-10 00:15:22 +0100 |
| commit | cb492da9134c911502905cf9ec705c54992c9df9 (patch) | |
| tree | 925d98482574617acecfeb7c421620976de8bdaf /src/superio/intel/i8900/i8900.h | |
| parent | 31f4d00c95731be956110f4c76656c330fd4684f (diff) | |
superio/intel: Add i8900 device
The Intel i8900 Super I/O is similar to the previously
supported i3100.
Change-Id: I9a5b651cab35991c3c3e09fc4668d35ca2d221ba
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/12169
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: York Yang <york.yang@intel.com>
Diffstat (limited to 'src/superio/intel/i8900/i8900.h')
| -rw-r--r-- | src/superio/intel/i8900/i8900.h | 60 |
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 |