path: root/drivers/hwmon/w83792d.c

/*
    w83792d.c - Part of lm_sensors, Linux kernel modules for hardware
                monitoring
    Copyright (C) 2004, 2005 Winbond Electronics Corp.
                        Chunhao Huang <DZShen@Winbond.com.tw>,
                        Rudolf Marek <r.marek@assembler.cz>

    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.

    Note:
    1. This driver is only for 2.6 kernel, 2.4 kernel need a different driver.
    2. This driver is only for Winbond W83792D C version device, there
       are also some motherboards with B version W83792D device. The
       calculation method to in6-in7(measured value, limits) is a little
       different between C and B version. C or B version can be identified
       by CR[0x49h].
*/

/*
    Supports following chips:

    Chip	#vin	#fanin	#pwm	#temp	wchipid	vendid	i2c	ISA
    w83792d	9	7	7	3	0x7a	0x5ca3	yes	no
*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.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>

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
						I2C_CLIENT_END };

/* Insmod parameters */

static unsigned short force_subclients[4];
module_param_array(force_subclients, short, NULL, 0);
MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
			"{bus, clientaddr, subclientaddr1, subclientaddr2}");

static int init;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to one to force chip initialization");

/* The W83792D registers */
static const u8 W83792D_REG_IN[9] = {
	0x20,	/* Vcore A in DataSheet */
	0x21,	/* Vcore B in DataSheet */
	0x22,	/* VIN0 in DataSheet */
	0x23,	/* VIN1 in DataSheet */
	0x24,	/* VIN2 in DataSheet */
	0x25,	/* VIN3 in DataSheet */
	0x26,	/* 5VCC in DataSheet */
	0xB0,	/* 5VSB in DataSheet */
	0xB1	/* VBAT in DataSheet */
};
#define W83792D_REG_LOW_BITS1 0x3E  /* Low Bits I in DataSheet */
#define W83792D_REG_LOW_BITS2 0x3F  /* Low Bits II in DataSheet */
static const u8 W83792D_REG_IN_MAX[9] = {
	0x2B,	/* Vcore A High Limit in DataSheet */
	0x2D,	/* Vcore B High Limit in DataSheet */
	0x2F,	/* VIN0 High Limit in DataSheet */
	0x31,	/* VIN1 High Limit in DataSheet */
	0x33,	/* VIN2 High Limit in DataSheet */
	0x35,	/* VIN3 High Limit in DataSheet */
	0x37,	/* 5VCC High Limit in DataSheet */
	0xB4,	/* 5VSB High Limit in DataSheet */
	0xB6	/* VBAT High Limit in DataSheet */
};
static const u8 W83792D_REG_IN_MIN[9] = {
	0x2C,	/* Vcore A Low Limit in DataSheet */
	0x2E,	/* Vcore B Low Limit in DataSheet */
	0x30,	/* VIN0 Low Limit in DataSheet */
	0x32,	/* VIN1 Low Limit in DataSheet */
	0x34,	/* VIN2 Low Limit in DataSheet */
	0x36,	/* VIN3 Low Limit in DataSheet */
	0x38,	/* 5VCC Low Limit in DataSheet */
	0xB5,	/* 5VSB Low Limit in DataSheet */
	0xB7	/* VBAT Low Limit in DataSheet */
};
static const u8 W83792D_REG_FAN[7] = {
	0x28,	/* FAN 1 Count in DataSheet */
	0x29,	/* FAN 2 Count in DataSheet */
	0x2A,	/* FAN 3 Count in DataSheet */
	0xB8,	/* FAN 4 Count in DataSheet */
	0xB9,	/* FAN 5 Count in DataSheet */
	0xBA,	/* FAN 6 Count in DataSheet */
	0xBE	/* FAN 7 Count in DataSheet */
};
static const u8 W83792D_REG_FAN_MIN[7] = {
	0x3B,	/* FAN 1 Count Low Limit in DataSheet */
	0x3C,	/* FAN 2 Count Low Limit in DataSheet */
	0x3D,	/* FAN 3 Count Low Limit in DataSheet */
	0xBB,	/* FAN 4 Count Low Limit