freebsd-dev/sys/dev/ichwd/ichwd.h
Dag-Erling Smørgrav cae8da6164 Add a driver for the watchdog timer function present on the LPC interface
bridge in Intel ICH-series chipsets.

The original implementation was by W. Daryl Hawkins of Texas A&M, but I
have made substantial modifications.
2004-05-11 18:21:38 +00:00

120 lines
3.9 KiB
C

/*
* Copyright (c) 2004 Texas A&M University
* All rights reserved.
*
* Developer: Wm. Daryl Hawkins
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _ICHWD_H_
#define _ICHWD_H_
struct ichwd_device {
uint16_t vendor;
uint16_t device;
char *desc;
};
struct ichwd_softc {
device_t device;
int active;
unsigned int timeout;
int smi_rid;
struct resource *smi_res;
bus_space_tag_t smi_bst;
bus_space_handle_t smi_bsh;
int tco_rid;
struct resource *tco_res;
bus_space_tag_t tco_bst;
bus_space_handle_t tco_bsh;
eventhandler_tag ev_tag;
};
#define VENDORID_INTEL 0x8086
#define DEVICEID_82801AA 0x2410
#define DEVICEID_82801AB 0x2420
#define DEVICEID_82801BA 0x2440
#define DEVICEID_82801BAM 0x244c
#define DEVICEID_82801CA 0x2480
#define DEVICEID_82801CAM 0x248c
#define DEVICEID_82801DB 0x24c0
#define DEVICEID_82801DBM 0x24cc
#define DEVICEID_82801E 0x2450
#define DEVICEID_82801EBR 0x24d0
/* ICH LPC Interface Bridge Registers */
#define ICH_GEN_STA 0xd4
#define ICH_GEN_STA_NO_REBOOT 0x02
#define ICH_PMBASE 0x40 /* ACPI base address register */
#define ICH_PMBASE_MASK 0x7f80 /* bits 7-15 */
/* register names and locations (relative to PMBASE) */
#define SMI_BASE 0x30 /* base address for SMI registers */
#define SMI_LEN 0x08
#define SMI_EN 0x00 /* SMI Control and Enable Register */
#define SMI_STS 0x04 /* SMI Status Register */
#define TCO_BASE 0x60 /* base address for TCO registers */
#define TCO_LEN 0x0a
#define TCO_RLD 0x00 /* TCO Reload and Current Value */
#define TCO_TMR 0x01 /* TCO Timer Initial Value */
#define TCO_DAT_IN 0x02 /* TCO Data In (DO NOT USE) */
#define TCO_DAT_OUT 0x03 /* TCO Data Out (DO NOT USE) */
#define TCO1_STS 0x04 /* TCO Status 1 */
#define TCO2_STS 0x06 /* TCO Status 2 */
#define TCO1_CNT 0x08 /* TCO Control 1 */
/* bit definitions for SMI_EN and SMI_STS */
#define SMI_TCO_EN 0x2000
#define SMI_TCO_STS 0x2000
/* timer value mask for TCO_RLD and TCO_TMR */
#define TCO_TIMER_MASK 0x1f
/* status bits for TCO1_STS */
#define TCO_TIMEOUT 0x08 /* timed out */
#define TCO_INT_STS 0x04 /* data out (DO NOT USE) */
#define TCO_SMI_STS 0x02 /* data in (DO NOT USE) */
/* status bits for TCO2_STS */
#define TCO_BOOT_STS 0x04 /* failed to come out of reset */
#define TCO_SECOND_TO_STS 0x02 /* ran down twice */
/* control bits for TCO1_CNT */
#define TCO_TMR_HALT 0x0800 /* clear to enable WDT */
#define TCO_CNT_PRESERVE 0x0200 /* preserve these bits */
/* approximate length in nanoseconds of one WDT tick */
#define ICHWD_TICK 600000000
/* minimum / maximum timeout in WDT ticks */
#define ICHWD_MIN_TIMEOUT 2
#define ICHWD_MAX_TIMEOUT 63
#endif