src/superio/intel/i3100/i3100.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2008 Arastra, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #ifndef SUPERIO_INTEL_I3100_H
  18 #define SUPERIO_INTEL_I3100_H
  19
  20 /*
  21  * Datasheet:
  22  *  - Name: Intel 3100 Chipset
  23  *  - URL: http://www.intel.com/design/intarch/datashts/313458.htm
  24  *  - PDF: http://download.intel.com/design/intarch/datashts/31345803.pdf
  25  *  - Revision / Date: 007, October 2008
  26  *  - Order number: 313458-007US
  27  */
  28
  29 /*
  30  * The SIW ("Serial I/O and Watchdog Timer") integrated into the i3100 is
  31  * very similar to a Super I/O, both in functionality and config mechanism.
  32  *
  33  * The SIW contains:
  34  *  - UART(s)
  35  *  - Serial interrupt controller
  36  *  - Watchdog timer (WDT)
  37  *  - LPC interface
  38  */
  39
  40 /* Logical device numbers (LDNs). */
  41 #define I3100_SP1 0x04 /* Com1 */
  42 #define I3100_SP2 0x05 /* Com2 */
  43 #define I3100_WDT 0x06 /* Watchdog timer */
  44
  45 /* Registers and bit definitions: */
  46
  47 #define I3100_SIW_CONFIGURATION         0x29
  48
  49 /*
  50  * SIW_CONFIGURATION[3:2] = UART_CLK predivide
  51  * 00: divide by 1
  52  * 01: divide by 8
  53  * 10: divide by 26
  54  * 11: reserved
  55  */
  56 #define I3100_UART_CLK_PREDIVIDE_1      0x00
  57 #define I3100_UART_CLK_PREDIVIDE_8      0x01
  58 #define I3100_UART_CLK_PREDIVIDE_26     0x02
  59
  60 #include <arch/io.h>
  61 #include <stdint.h>
  62
  63 void i3100_configure_uart_clk(pnp_devfn_t dev, u8 predivide);
  64 void i3100_enable_serial(pnp_devfn_t dev, u16 iobase);
  65
  66 #endif /* SUPERIO_INTEL_I3100_H */