/* fschmd.c
*
* Copyright (C) 2007 - 2009 Hans de Goede <hdegoede@redhat.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes,
* Scylla, Heracles, Heimdall, Hades and Syleus chips
*
* Based on the original 2.4 fscscy, 2.6 fscpos, 2.6 fscher and 2.6
* (candidate) fschmd drivers:
* Copyright (C) 2006 Thilo Cestonaro
* <thilo.cestonaro.external@fujitsu-siemens.com>
* Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
* Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
* Copyright (c) 2001 Martin Knoblauch <mkn@teraport.de, knobi@knobisoft.de>
* Copyright (C) 2000 Hermann Jung <hej@odn.de>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/dmi.h>
#include <linux/fs.h>
#include <linux/watchdog.h>
#include <linux/miscdevice.h>
#include <linux/uaccess.h>
#include <linux/kref.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
/* Insmod parameters */
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
enum chips { fscpos, fscher, fscscy, fschrc, fschmd, fschds, fscsyl };
/*
* The FSCHMD registers and other defines
*/
/* chip identification */
#define FSCHMD_REG_IDENT_0 0x00
#define FSCHMD_REG_IDENT_1 0x01
#define FSCHMD_REG_IDENT_2 0x02
#define FSCHMD_REG_REVISION 0x03
/* global control and status */
#define FSCHMD_REG_EVENT_STATE 0x04
#define FSCHMD_REG_CONTROL 0x05
#define FSCHMD_CONTROL_ALERT_LED 0x01
/* watchdog */
static const u8 FSCHMD_REG_WDOG_CONTROL[7] =
{ 0x21, 0x21, 0x21, 0x21, 0x21, 0x28, 0x28 };
static const u8 FSCHMD_REG_WDOG_STATE[7] =
{ 0x23, 0x23, 0x23, 0x23, 0x23, 0x29, 0x29 };
static const u8 FSCHMD_REG_WDOG_PRESET[7] =
{ 0x28, 0x28, 0x28, 0x28, 0x28, 0x2a, 0x2a };
#define FSCHMD_WDOG_CONTROL_TRIGGER 0x10
#define FSCHMD_WDOG_CONTROL_STARTED 0x10 /* the same as trigger */
#define FSCHMD_WDOG_CONTROL_STOP 0x20
#define FSCHMD_WDOG_CONTROL_RESOLUTION 0x40
#define FSCHMD_WDOG_STATE_CARDRESET 0x02
/* voltages, weird order is to keep the same order as the old drivers */
static const u8 FSCHMD_REG_VOLT[7][6] = {
{ 0x45, 0x42,