w83627hf.c

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/*
    w83627hf.c - Part of lm_sensors, Linux kernel modules for hardware
                monitoring
    Copyright (c) 1998 - 2003  Frodo Looijaard <[e-mail]>,
    Philip Edelbrock <[e-mail]>,
    and Mark Studebaker <[e-mail]>
    Ported to 2.6 by Bernhard C. Schrenk <[e-mail]>
    Copyright (c) 2007  Jean Delvare <[e-mail]>

    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.
*/

/*
    Supports following chips:

    Chip	#vin	#fanin	#pwm	#temp	wchipid	vendid	i2c	ISA
    w83627hf	9	3	2	3	0x20	0x5ca3	no	yes(LPC)
    w83627thf	7	3	3	3	0x90	0x5ca3	no	yes(LPC)
    w83637hf	7	3	3	3	0x80	0x5ca3	no	yes(LPC)
    w83687thf	7	3	3	3	0x90	0x5ca3	no	yes(LPC)
    w83697hf	8	2	2	2	0x60	0x5ca3	no	yes(LPC)

    For other winbond chips, and for i2c support in the above chips,
    use w83781d.c.

    Note: automatic ("cruise") fan control for 697, 637 & 627thf not
    supported yet.
*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include "lm75.h"

static struct platform_device *pdev;

#define DRVNAME "w83627hf"
enum chips { w83627hf, w83627thf, w83697hf, w83637hf, w83687thf };

static u16 force_addr;
module_param(force_addr, ushort, 0);
MODULE_PARM_DESC(force_addr,
		 "Initialize the base address of the sensors");
static u8 force_i2c = 0x1f;
module_param(force_i2c, byte, 0);
MODULE_PARM_DESC(force_i2c,
		 "Initialize the i2c address of the sensors");

static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to one to reset chip on load");

static int init = 1;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");

/* modified from kernel/include/traps.c */
static int REG;		/* The register to read/write */
#define	DEV	0x07	/* Register: Logical device select */
static int VAL;		/* The value to read/write */

/* logical device numbers for superio_select (below) */
#define W83627HF_LD_FDC		0x00
#define W83627HF_LD_PRT		0x01
#define W83627HF_LD_UART1	0x02
#define W83627HF_LD_UART2	0x03
#define W83627HF_LD_KBC		0x05
#define W83627HF_LD_CIR		0x06 /* w83627hf only */
#define W83627HF_LD_GAME	0x07
#define W83627HF_LD_MIDI	0x07
#define W83627HF_LD_GPIO1	0x07
#define W83627HF_LD_GPIO5	0x07 /* w83627thf only */
#define W83627HF_LD_GPIO2	0x08
#define W83627HF_LD_GPIO3	0x09
#define W83627HF_LD_GPIO4	0x09 /* w83627thf only */
#define W83627HF_LD_ACPI	0x0a
#define W83627HF_LD_HWM		0x0b

#define	DEVID	0x20	/* Register: Device ID */

#define W83627THF_GPIO5_EN	0x30 /* w83627thf only */
#define W83627THF_GPIO5_IOSR	0xf3 /* w83627thf only */
#define W83627THF_GPIO5_DR	0xf4 /* w83627thf only */

#define W83687THF_VID_EN	0x29 /* w83687thf only */
#define W83687THF_VID_CFG	0xF0 /* w83687thf only */
#define W83687THF_VID_DATA	0xF1 /* w83687thf only */

static inline void
superio_outb(int reg, int val)
{
	outb(reg, REG);
	outb(val, VAL);
}

static inline int
superio_inb(int reg)
{
	outb(reg, REG);
	return inb(VAL);
}

static inline void
superio_select(int ld)
{
	outb(DEV, REG);
	outb(ld, VAL);
}

static inline void
superio_enter(void)
{
	outb(0x87, REG);
	outb(0x87, REG);
}

static inline void
superio_exit(void)
{
	outb(0xAA, REG);
}

#define W627_DEVID 0x52
#define W627THF_DEVID 0x82
#define W697_DEVID 0x60
#define W637_DEVID 0x70
#define W687THF_DEVID 0x85
#define WINB_ACT_REG 0x30
#define WINB_BASE_REG 0x60
/* Constants specified below */

/* Alignment of the base address */
#define WINB_ALIGNMENT		~7

/* Offset & size of I/O region we are interested in */
#define WINB_REGION_OFFSET	5
#define WINB_REGION_SIZE	2

/* Where are the sensors address/data registers relative to the region offset */
#define W83781D_ADDR_REG_OFFSET 0
#define W83781D_DATA_REG_OFFSET 1

/* The W83781D registers */
/* The W83782D registers for nr=7,8 are in bank 5 */
#define W83781D_REG_IN_MAX(nr) ((nr < 7) ? (0x2b + (nr) * 2) : \
					   (0x554 + (((nr) - 7) * 2)))
#define W83781D_REG_IN_MIN(nr) ((nr < 7) ? (0x2c + (nr) * 2) : \
					   (0x555 + (((nr) - 7) * 2)))
#define W83781D_REG_IN(nr)     ((nr < 7) ? (0x20 + (nr)) : \
					   (0x550 + (nr) - 7))

/* nr:0-2 for fans:1-3 */
#define W83627HF_REG_FAN_MIN(nr)	(0x3b + (nr))
#define W83627HF_REG_FAN(nr)		(0x28 + (nr))

#define W83627HF_REG_TEMP2_CONFIG 0x152
#define W83627HF_REG_TEMP3_CONFIG 0x252
/* these are zero-based, unlike config constants above */
static const u16 w83627hf_reg_temp[]		= { 0x27, 0x150, 0x250 };
static const u16 w83627hf_reg_temp_hyst[]	= { 0x3A, 0x153, 0x253 };
static const u16 w83627hf_reg_temp_over[]	= { 0x39, 0x155, 0x255 };

#define W83781D_REG_BANK 0x4E

#define W83781D_REG_CONFIG 0x40
#define W83781D_REG_ALARM1 0x459
#define W83781D_REG_ALARM2 0x45A
#define W83781D_REG_ALARM3 0x45B

#define W83781D_REG_BEEP_CONFIG 0x4D
#define W83781D_REG_BEEP_INTS1 0x56
#define W83781D_REG_BEEP_INTS2 0x57
#define W83781D_REG_BEEP_INTS3 0x453

#define W83781D_REG_VID_FANDIV 0x47

#define W83781D_REG_CHIPID 0x49
#define W83781D_REG_WCHIPID 0x58
#define W83781D_REG_CHIPMAN 0x4F
#define W83781D_REG_PIN 0x4B

#define W83781D_REG_VBAT 0x5D

#define W83627HF_REG_PWM1 0x5A
#define W83627HF_REG_PWM2 0x5B

#define W83627THF_REG_PWM1		0x01	/* 697HF/637HF/687THF too */
#define W83627THF_REG_PWM2		0x03	/* 697HF/637HF/687THF too */
#define W83627THF_REG_PWM3		0x11	/* 637HF/687THF too */

#define W83627THF_REG_VRM_OVT_CFG 	0x18	/* 637HF/687THF too */

static const u8 regpwm_627hf[] = { W83627HF_REG_PWM1, W83627HF_REG_PWM2 };
static const u8 regpwm[] = { W83627THF_REG_PWM1, W83627THF_REG_PWM2,
                             W83627THF_REG_PWM3 };
#define W836X7HF_REG_PWM(type, nr) (((type) == w83627hf) ? \
				    regpwm_627hf[nr] : regpwm[nr])

#define W83627HF_REG_PWM_FREQ		0x5C	/* Only for the 627HF */

#define W83637HF_REG_PWM_FREQ1		0x00	/* 697HF/687THF too */
#define W83637HF_REG_PWM_FREQ2		0x02	/* 697HF/687THF too */
#define W83637HF_REG_PWM_FREQ3		0x10	/* 687THF too */

static const u8 W83637HF_REG_PWM_FREQ[] = { W83637HF_REG_PWM_FREQ1,
					W83637HF_REG_PWM_FREQ2,
					W83637HF_REG_PWM_FREQ3 };

#define W83627HF_BASE_PWM_FREQ	46870

#define W83781D_REG_I2C_ADDR 0x48
#define W83781D_REG_I2C_SUBADDR 0x4A

/* Sensor selection */
#define W83781D_REG_SCFG1 0x5D
static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
#define W83781D_REG_SCFG2 0x59
static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
#define W83781D_DEFAULT_BETA 3435

/* Conversions. Limit checking is only done on the TO_REG
   variants. Note that you should be a bit careful with which arguments
   these macros are called: arguments may be evaluated more than once.
   Fixing this is just not worth it. */
#define IN_TO_REG(val)  (SENSORS_LIMIT((((val) + 8)/16),0,255))
#define IN_FROM_REG(val) ((val) * 16)

static inline u8 FAN_TO_REG(long rpm, int div)
{
	if (rpm == 0)
		return 255;
	rpm = SENSORS_LIMIT(rpm, 1, 1000000);
	return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
			     254);
}

#define TEMP_MIN (-128000)
#define TEMP_MAX ( 127000)

/* TEMP: 0.001C/bit (-128C to +127C)
   REG: 1C/bit, two's complement */
static u8 TEMP_TO_REG(long temp)
{
        int ntemp = SENSORS_LIMIT(temp, TEMP_MIN, TEMP_MAX);
        ntemp += (ntemp<0 ? -500 : 500);
        return (u8)(ntemp / 1000);
}

static int TEMP_FROM_REG(u8 reg)
{
        return (s8)reg * 1000;
}

#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))

#define PWM_TO_REG(val) (SENSORS_LIMIT((val),0,255))

static inline unsigned long pwm_freq_from_reg_627hf(u8 reg)
{
	unsigned long freq;
	freq = W83627HF_BASE_PWM_FREQ >> reg;
	return freq;
}
static inline u8 pwm_freq_to_reg_627hf(unsigned long val)
{
	u8 i;
	/* Only 5 dividers (1 2 4 8 16)
	   Search for the nearest available frequency */
	for (i = 0; i < 4; i++) {
		if (val > (((W83627HF_BASE_PWM_FREQ >> i) +
			    (W83627HF_BASE_PWM_FREQ >> (i+1))) / 2))
			break;
	}
	return i;
}

static inline unsigned long pwm_freq_from_reg(u8 reg)
{
	/* Clock bit 8 -> 180 kHz or 24 MHz */
	unsigned long clock = (reg & 0x80) ? 180000UL : 24000000UL;

	reg &= 0x7f;
	/* This should not happen but anyway... */
	if (reg == 0)
		reg++;
	return (clock / (reg << 8));
}
static inline u8 pwm_freq_to_reg(unsigned long val)
{
	/* Minimum divider value is 0x01 and maximum is 0x7F */
	if (val >= 93750)	/* The highest we can do */
		return 0x01;
	if (val >= 720)	/* Use 24 MHz clock */
		return (24000000UL / (val << 8));
	if (val < 6)		/* The lowest we can do */
		return 0xFF;
	else			/* Use 180 kHz clock */
		return (0x80 | (180000UL / (val << 8)));
}

#define BEEP_MASK_FROM_REG(val)		 (val)
#define BEEP_MASK_TO_REG(val)		((val) & 0xffffff)
#define BEEP_ENABLE_TO_REG(val)		((val)?1:0)
#define BEEP_ENABLE_FROM_REG(val)	((val)?1:0)

#define DIV_FROM_REG(val) (1 << (val))

static inline u8 DIV_TO_REG(long val)
{
	int i;
	val = SENSORS_LIMIT(val, 1, 128) >> 1;
	for (i = 0; i < 7; i++) {
		if (val == 0)
			break;
		val >>= 1;
	}
	return ((u8) i);
}

/* For each registered chip, we need to keep some data in memory.
   The structure is dynamically allocated. */
struct w83627hf_data {
	unsigned short addr;
	const char *name;
	struct device *hwmon_dev;
	struct mutex lock;
	enum chips type;

	struct mutex update_lock;
	char valid;		/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */

	u8 in[9];		/* Register value */
	u8 in_max[9];		/* Register value */
	u8 in_min[9];		/* Register value */
	u8 fan[3];		/* Register value */
	u8 fan_min[3];		/* Register value */
	u16 temp[3];		/* Register value */
	u16 temp_max[3];	/* Register value */
	u16 temp_max_hyst[3];	/* Register value */
	u8 fan_div[3];		/* Register encoding, shifted right */
	u8 vid;			/* Register encoding, combined */
	u32 alarms;		/* Register encoding, combined */
	u32 beep_mask;		/* Register encoding, combined */
	u8 beep_enable;		/* Boolean */
	u8 pwm[3];		/* Register value */
	u8 pwm_freq[3];		/* Register value */
	u16 sens[3];		/* 1 = pentium diode; 2 = 3904 diode;
				   4 = thermistor */
	u8 vrm;
	u8 vrm_ovt;		/* Register value, 627THF/637HF/687THF only */
};

struct w83627hf_sio_data {
	enum chips type;
};


static int w83627hf_probe(struct platform_device *pdev);
static int __devexit w83627hf_remove(struct platform_device *pdev);

static int w83627hf_read_value(struct w83627hf_data *data, u16 reg);
static int w83627hf_write_value(struct w83627hf_data *data, u16 reg, u16 value);
static void w83627hf_update_fan_div(struct w83627hf_data *data);
static struct w83627hf_data *w83627hf_update_device(struct device *dev);
static void w83627hf_init_device(struct platform_device *pdev);

static struct platform_driver w83627hf_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= DRVNAME,
	},
	.probe		= w83627hf_probe,
	.remove		= __devexit_p(w83627hf_remove),
};

static ssize_t
show_in_input(struct device *dev, struct device_attribute *devattr, char *buf)
{
	int nr = to_sensor_dev_attr(devattr)->index;
	struct w83627hf_data *data = w83627hf_update_device(dev);
	return sprintf(buf, "%ld\n", (long)IN_FROM_REG(data->in[nr]));
}
static ssize_t
show_in_min(struct device *dev, struct device_attribute *devattr, char *buf)
{
	int nr = to_sensor_dev_attr(devattr)->index;
	struct w83627hf_data *data = w83627hf_update_device(dev);
	return sprintf(buf, "%ld\n", (long)IN_FROM_REG(data->in_min[nr]));
}
static ssize_t
show_in_max(struct device *dev, struct device_attribute *devattr, char *buf)
{
	int nr = to_sensor_dev_attr(devattr)->index;
	struct w83627hf_data *data = w83627hf_update_device(dev);
	return sprintf(buf, "%ld\n", (long)IN_FROM_REG(data->in_max[nr]));
}
static ssize_t
store_in_min(struct device *dev, struct device_attribute *devattr,
	     const char *buf, size_t count)
{
	int nr = to_sensor_dev_attr(devattr)->index;
	struct w83627hf_data *data = dev_get_drvdata(dev);
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);