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linux/drivers/hwmon/dme1737.c
Mark M. Hoffman 25e9c86d5a hwmon: normal_i2c arrays should be const 
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
2008-02-18 21:58:15 -05:00

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/*
* dme1737.c - Driver for the SMSC DME1737, Asus A8000, and SMSC SCH311x
* Super-I/O chips integrated hardware monitoring features.
* Copyright (c) 2007 Juerg Haefliger <juergh@gmail.com>
*
* This driver is an I2C/ISA hybrid, meaning that it uses the I2C bus to access
* the chip registers if a DME1737 (or A8000) is found and the ISA bus if a
* SCH311x chip is found. Both types of chips have very similar hardware
* monitoring capabilities but differ in the way they can be accessed.
*
* 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.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.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 <asm/io.h>
/* ISA device, if found */
static struct platform_device *pdev;
/* Module load parameters */
static int force_start;
module_param(force_start, bool, 0);
MODULE_PARM_DESC(force_start, "Force the chip to start monitoring inputs");
static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
/* Addresses to scan */
static const unsigned short normal_i2c[] = {0x2c, 0x2d, 0x2e, I2C_CLIENT_END};
/* Insmod parameters */
I2C_CLIENT_INSMOD_1(dme1737);
/* ---------------------------------------------------------------------
* Registers
*
* The sensors are defined as follows:
*
* Voltages Temperatures
* -------- ------------
* in0 +5VTR (+5V stdby) temp1 Remote diode 1
* in1 Vccp (proc core) temp2 Internal temp
* in2 VCC (internal +3.3V) temp3 Remote diode 2
* in3 +5V
* in4 +12V
* in5 VTR (+3.3V stby)
* in6 Vbat
*
* --------------------------------------------------------------------- */
/* Voltages (in) numbered 0-6 (ix) */
#define DME1737_REG_IN(ix) ((ix) < 5 ? 0x20 + (ix) \
: 0x94 + (ix))
#define DME1737_REG_IN_MIN(ix) ((ix) < 5 ? 0x44 + (ix) * 2 \
: 0x91 + (ix) * 2)
#define DME1737_REG_IN_MAX(ix) ((ix) < 5 ? 0x45 + (ix) * 2 \
: 0x92 + (ix) * 2)
/* Temperatures (temp) numbered 0-2 (ix) */
#define DME1737_REG_TEMP(ix) (0x25 + (ix))
#define DME1737_REG_TEMP_MIN(ix) (0x4e + (ix) * 2)
#define DME1737_REG_TEMP_MAX(ix) (0x4f + (ix) * 2)
#define DME1737_REG_TEMP_OFFSET(ix) ((ix) == 0 ? 0x1f \
: 0x1c + (ix))
/* Voltage and temperature LSBs
* The LSBs (4 bits each) are stored in 5 registers with the following layouts:
* IN_TEMP_LSB(0) = [in5, in6]
* IN_TEMP_LSB(1) = [temp3, temp1]
* IN_TEMP_LSB(2) = [in4, temp2]
* IN_TEMP_LSB(3) = [in3, in0]
* IN_TEMP_LSB(4) = [in2, in1] */
#define DME1737_REG_IN_TEMP_LSB(ix) (0x84 + (ix))
static const u8 DME1737_REG_IN_LSB[] = {3, 4, 4, 3, 2, 0, 0};
static const u8 DME1737_REG_IN_LSB_SHL[] = {4, 4, 0, 0, 0, 0, 4};
static const u8 DME1737_REG_TEMP_LSB[] = {1, 2, 1};
static const u8 DME1737_REG_TEMP_LSB_SHL[] = {4, 4, 0};
/* Fans numbered 0-5 (ix) */
#define DME1737_REG_FAN(ix) ((ix) < 4 ? 0x28 + (ix) * 2 \
: 0xa1 + (ix) * 2)
#define DME1737_REG_FAN_MIN(ix) ((ix) < 4 ? 0x54 + (ix) * 2 \
: 0xa5 + (ix) * 2)
#define DME1737_REG_FAN_OPT(ix) ((ix) < 4 ? 0x90 + (ix) \
: 0xb2 + (ix))
#define DME1737_REG_FAN_MAX(ix) (0xb4 + (ix)) /* only for fan[4-5] */
/* PWMs numbered 0-2, 4-5 (ix) */
#define DME1737_REG_PWM(ix) ((ix) < 3 ? 0x30 + (ix) \
: 0xa1 + (ix))
#define DME1737_REG_PWM_CONFIG(ix) (0x5c + (ix)) /* only for pwm[0-2] */
#define DME1737_REG_PWM_MIN(ix) (0x64 + (ix)) /* only for pwm[0-2] */
#define DME1737_REG_PWM_FREQ(ix) ((ix) < 3 ? 0x5f + (ix) \
: 0xa3 + (ix))
/* The layout of the ramp rate registers is different from the other pwm
* registers. The bits for the 3 PWMs are stored in 2 registers:
* PWM_RR(0) = [OFF3, OFF2, OFF1, RES, RR1E, RR1-2, RR1-1, RR1-0]
* PWM_RR(1) = [RR2E, RR2-2, RR2-1, RR2-0, RR3E, RR3-2, RR3-1, RR3-0] */
#define DME1737_REG_PWM_RR(ix) (0x62 + (ix)) /* only for pwm[0-2] */
/* Thermal zones 0-2 */
#define DME1737_REG_ZONE_LOW(ix) (0x67 + (ix))
#define DME1737_REG_ZONE_ABS(ix) (0x6a + (ix))
/* The layout of the hysteresis registers is different from the other zone
* registers. The bits for the 3 zones are stored in 2 registers:
* ZONE_HYST(0) = [H1-3, H1-2, H1-1, H1-0, H2-3, H2-2, H2-1, H2-0]
* ZONE_HYST(1) = [H3-3, H3-2, H3-1, H3-0, RES, RES, RES, RES] */
#define DME1737_REG_ZONE_HYST(ix) (0x6d + (ix))
/* Alarm registers and bit mapping
* The 3 8-bit alarm registers will be concatenated to a single 32-bit
* alarm value [0, ALARM3, ALARM2, ALARM1]. */
#define DME1737_REG_ALARM1 0x41
#define DME1737_REG_ALARM2 0x42
#define DME1737_REG_ALARM3 0x83
static const u8 DME1737_BIT_ALARM_IN[] = {0, 1, 2, 3, 8, 16, 17};
static const u8 DME1737_BIT_ALARM_TEMP[] = {4, 5, 6};
static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23};
/* Miscellaneous registers */
#define DME1737_REG_DEVICE 0x3d
#define DME1737_REG_COMPANY 0x3e
#define DME1737_REG_VERSTEP 0x3f
#define DME1737_REG_CONFIG 0x40
#define DME1737_REG_CONFIG2 0x7f
#define DME1737_REG_VID 0x43
#define DME1737_REG_TACH_PWM 0x81
/* ---------------------------------------------------------------------
* Misc defines
* --------------------------------------------------------------------- */
/* Chip identification */
#define DME1737_COMPANY_SMSC 0x5c
#define DME1737_VERSTEP 0x88
#define DME1737_VERSTEP_MASK 0xf8
#define SCH311X_DEVICE 0x8c
/* Length of ISA address segment */
#define DME1737_EXTENT 2
/* ---------------------------------------------------------------------
* Data structures and manipulation thereof
* --------------------------------------------------------------------- */
/* For ISA chips, we abuse the i2c_client addr and name fields. We also use
the driver field to differentiate between I2C and ISA chips. */
struct dme1737_data {
struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
int valid; /* !=0 if following fields are valid */
unsigned long last_update; /* in jiffies */
unsigned long last_vbat; /* in jiffies */
u8 vid;
u8 pwm_rr_en;
u8 has_pwm;
u8 has_fan;
/* Register values */
u16 in[7];
u8 in_min[7];
u8 in_max[7];
s16 temp[3];
s8 temp_min[3];
s8 temp_max[3];
s8 temp_offset[3];
u8 config;
u8 config2;
u8 vrm;
u16 fan[6];
u16 fan_min[6];
u8 fan_max[2];
u8 fan_opt[6];
u8 pwm[6];
u8 pwm_min[3];
u8 pwm_config[3];
u8 pwm_acz[3];
u8 pwm_freq[6];
u8 pwm_rr[2];
u8 zone_low[3];
u8 zone_abs[3];
u8 zone_hyst[2];
u32 alarms;
};
/* Nominal voltage values */
static const int IN_NOMINAL[] = {5000, 2250, 3300, 5000, 12000, 3300, 3300};
/* Voltage input
* Voltage inputs have 16 bits resolution, limit values have 8 bits
* resolution. */
static inline int IN_FROM_REG(int reg, int ix, int res)
{
return (reg * IN_NOMINAL[ix] + (3 << (res - 3))) / (3 << (res - 2));
}
static inline int IN_TO_REG(int val, int ix)
{
return SENSORS_LIMIT((val * 192 + IN_NOMINAL[ix] / 2) /
IN_NOMINAL[ix], 0, 255);
}
/* Temperature input
* The register values represent temperatures in 2's complement notation from
* -127 degrees C to +127 degrees C. Temp inputs have 16 bits resolution, limit
* values have 8 bits resolution. */
static inline int TEMP_FROM_REG(int reg, int res)
{
return (reg * 1000) >> (res - 8);
}
static inline int TEMP_TO_REG(int val)
{
return SENSORS_LIMIT((val < 0 ? val - 500 : val + 500) / 1000,
-128, 127);
}
/* Temperature range */
static const int TEMP_RANGE[] = {2000, 2500, 3333, 4000, 5000, 6666, 8000,
10000, 13333, 16000, 20000, 26666, 32000,
40000, 53333, 80000};
static inline int TEMP_RANGE_FROM_REG(int reg)
{
return TEMP_RANGE[(reg >> 4) & 0x0f];
}
static int TEMP_RANGE_TO_REG(int val, int reg)
{
int i;
for (i = 15; i > 0; i--) {
if (val > (TEMP_RANGE[i] + TEMP_RANGE[i - 1] + 1) / 2) {
break;
}
}
return (reg & 0x0f) | (i << 4);
}
/* Temperature hysteresis
* Register layout:
* reg[0] = [H1-3, H1-2, H1-1, H1-0, H2-3, H2-2, H2-1, H2-0]
* reg[1] = [H3-3, H3-2, H3-1, H3-0, xxxx, xxxx, xxxx, xxxx] */
static inline int TEMP_HYST_FROM_REG(int reg, int ix)
{
return (((ix == 1) ? reg : reg >> 4) & 0x0f) * 1000;
}
static inline int TEMP_HYST_TO_REG(int val, int ix, int reg)
{
int hyst = SENSORS_LIMIT((val + 500) / 1000, 0, 15);
return (ix == 1) ? (reg & 0xf0) | hyst : (reg & 0x0f) | (hyst << 4);
}
/* Fan input RPM */
static inline int FAN_FROM_REG(int reg, int tpc)
{
if (tpc) {
return tpc * reg;
} else {
return (reg == 0 || reg == 0xffff) ? 0 : 90000 * 60 / reg;
}
}
static inline int FAN_TO_REG(int val, int tpc)
{
if (tpc) {
return SENSORS_LIMIT(val / tpc, 0, 0xffff);
} else {
return (val <= 0) ? 0xffff :
SENSORS_LIMIT(90000 * 60 / val, 0, 0xfffe);
}
}
/* Fan TPC (tach pulse count)
* Converts a register value to a TPC multiplier or returns 0 if the tachometer
* is configured in legacy (non-tpc) mode */
static inline int FAN_TPC_FROM_REG(int reg)
{
return (reg & 0x20) ? 0 : 60 >> (reg & 0x03);
}
/* Fan type
* The type of a fan is expressed in number of pulses-per-revolution that it
* emits */
static inline int FAN_TYPE_FROM_REG(int reg)
{
int edge = (reg >> 1) & 0x03;
return (edge > 0) ? 1 << (edge - 1) : 0;
}
static inline int FAN_TYPE_TO_REG(int val, int reg)
{
int edge = (val == 4) ? 3 : val;
return (reg & 0xf9) | (edge << 1);
}
/* Fan max RPM */
static const int FAN_MAX[] = {0x54, 0x38, 0x2a, 0x21, 0x1c, 0x18, 0x15, 0x12,
0x11, 0x0f, 0x0e};
static int FAN_MAX_FROM_REG(int reg)
{
int i;
for (i = 10; i > 0; i--) {
if (reg == FAN_MAX[i]) {
break;
}
}
return 1000 + i * 500;
}
static int FAN_MAX_TO_REG(int val)
{
int i;
for (i = 10; i > 0; i--) {
if (val > (1000 + (i - 1) * 500)) {
break;
}
}
return FAN_MAX[i];
}
/* PWM enable
* Register to enable mapping:
* 000: 2 fan on zone 1 auto
* 001: 2 fan on zone 2 auto
* 010: 2 fan on zone 3 auto
* 011: 0 fan full on
* 100: -1 fan disabled
* 101: 2 fan on hottest of zones 2,3 auto
* 110: 2 fan on hottest of zones 1,2,3 auto
* 111: 1 fan in manual mode */
static inline int PWM_EN_FROM_REG(int reg)
{
static const int en[] = {2, 2, 2, 0, -1, 2, 2, 1};
return en[(reg >> 5) & 0x07];
}
static inline int PWM_EN_TO_REG(int val, int reg)
{
int en = (val == 1) ? 7 : 3;
return (reg & 0x1f) | ((en & 0x07) << 5);
}
/* PWM auto channels zone
* Register to auto channels zone mapping (ACZ is a bitfield with bit x
* corresponding to zone x+1):
* 000: 001 fan on zone 1 auto
* 001: 010 fan on zone 2 auto
* 010: 100 fan on zone 3 auto
* 011: 000 fan full on
* 100: 000 fan disabled
* 101: 110 fan on hottest of zones 2,3 auto
* 110: 111 fan on hottest of zones 1,2,3 auto
* 111: 000 fan in manual mode */
static inline int PWM_ACZ_FROM_REG(int reg)
{
static const int acz[] = {1, 2, 4, 0, 0, 6, 7, 0};
return acz[(reg >> 5) & 0x07];
}
static inline int PWM_ACZ_TO_REG(int val, int reg)
{
int acz = (val == 4) ? 2 : val - 1;
return (reg & 0x1f) | ((acz & 0x07) << 5);
}
/* PWM frequency */
static const int PWM_FREQ[] = {11, 15, 22, 29, 35, 44, 59, 88,
15000, 20000, 30000, 25000, 0, 0, 0, 0};
static inline int PWM_FREQ_FROM_REG(int reg)
{
return PWM_FREQ[reg & 0x0f];
}
static int PWM_FREQ_TO_REG(int val, int reg)
{
int i;
/* the first two cases are special - stupid chip design! */
if (val > 27500) {
i = 10;
} else if (val > 22500) {
i = 11;
} else {
for (i = 9; i > 0; i--) {
if (val > (PWM_FREQ[i] + PWM_FREQ[i - 1] + 1) / 2) {
break;
}
}
}
return (reg & 0xf0) | i;
}
/* PWM ramp rate
* Register layout:
* reg[0] = [OFF3, OFF2, OFF1, RES, RR1-E, RR1-2, RR1-1, RR1-0]
* reg[1] = [RR2-E, RR2-2, RR2-1, RR2-0, RR3-E, RR3-2, RR3-1, RR3-0] */
static const u8 PWM_RR[] = {206, 104, 69, 41, 26, 18, 10, 5};
static inline int PWM_RR_FROM_REG(int reg, int ix)
{
int rr = (ix == 1) ? reg >> 4 : reg;
return (rr & 0x08) ? PWM_RR[rr & 0x07] : 0;
}
static int PWM_RR_TO_REG(int val, int ix, int reg)
{
int i;
for (i = 0; i < 7; i++) {
if (val > (PWM_RR[i] + PWM_RR[i + 1] + 1) / 2) {
break;
}
}
return (ix == 1) ? (reg & 0x8f) | (i << 4) : (reg & 0xf8) | i;
}
/* PWM ramp rate enable */
static inline int PWM_RR_EN_FROM_REG(int reg, int ix)
{
return PWM_RR_FROM_REG(reg, ix) ? 1 : 0;
}
static inline int PWM_RR_EN_TO_REG(int val, int ix, int reg)
{
int en = (ix == 1) ? 0x80 : 0x08;
return val ? reg | en : reg & ~en;
}
/* PWM min/off
* The PWM min/off bits are part of the PMW ramp rate register 0 (see above for
* the register layout). */
static inline int PWM_OFF_FROM_REG(int reg, int ix)
{
return (reg >> (ix + 5)) & 0x01;
}
static inline int PWM_OFF_TO_REG(int val, int ix, int reg)
{
return (reg & ~(1 << (ix + 5))) | ((val & 0x01) << (ix + 5));
}
/* ---------------------------------------------------------------------
* Device I/O access
*
* ISA access is performed through an index/data register pair and needs to
* be protected by a mutex during runtime (not required for initialization).
* We use data->update_lock for this and need to ensure that we acquire it
* before calling dme1737_read or dme1737_write.
* --------------------------------------------------------------------- */
static u8 dme1737_read(struct i2c_client *client, u8 reg)
{
s32 val;
if (client->driver) { /* I2C device */
val = i2c_smbus_read_byte_data(client, reg);
if (val < 0) {
dev_warn(&client->dev, "Read from register "
"0x%02x failed! Please report to the driver "
"maintainer.\n", reg);
}
} else { /* ISA device */
outb(reg, client->addr);
val = inb(client->addr + 1);
}
return val;
}
static s32 dme1737_write(struct i2c_client *client, u8 reg, u8 val)
{
s32 res = 0;
if (client->driver) { /* I2C device */
res = i2c_smbus_write_byte_data(client, reg, val);
if (res < 0) {
dev_warn(&client->dev, "Write to register "
"0x%02x failed! Please report to the driver "
"maintainer.\n", reg);
}
} else { /* ISA device */
outb(reg, client->addr);
outb(val, client->addr + 1);
}
return res;
}
static struct dme1737_data *dme1737_update_device(struct device *dev)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
int ix;
u8 lsb[5];
mutex_lock(&data->update_lock);
/* Enable a Vbat monitoring cycle every 10 mins */
if (time_after(jiffies, data->last_vbat + 600 * HZ) || !data->valid) {
dme1737_write(client, DME1737_REG_CONFIG, dme1737_read(client,
DME1737_REG_CONFIG) | 0x10);
data->last_vbat = jiffies;
}
/* Sample register contents every 1 sec */
if (time_after(jiffies, data->last_update + HZ) || !data->valid) {
data->vid = dme1737_read(client, DME1737_REG_VID) & 0x3f;
/* In (voltage) registers */
for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
/* Voltage inputs are stored as 16 bit values even
* though they have only 12 bits resolution. This is
* to make it consistent with the temp inputs. */
data->in[ix] = dme1737_read(client,
DME1737_REG_IN(ix)) << 8;
data->in_min[ix] = dme1737_read(client,
DME1737_REG_IN_MIN(ix));
data->in_max[ix] = dme1737_read(client,
DME1737_REG_IN_MAX(ix));
}
/* Temp registers */
for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
/* Temp inputs are stored as 16 bit values even
* though they have only 12 bits resolution. This is
* to take advantage of implicit conversions between
* register values (2's complement) and temp values
* (signed decimal). */
data->temp[ix] = dme1737_read(client,
DME1737_REG_TEMP(ix)) << 8;
data->temp_min[ix] = dme1737_read(client,
DME1737_REG_TEMP_MIN(ix));
data->temp_max[ix] = dme1737_read(client,
DME1737_REG_TEMP_MAX(ix));
data->temp_offset[ix] = dme1737_read(client,
DME1737_REG_TEMP_OFFSET(ix));
}
/* In and temp LSB registers
* The LSBs are latched when the MSBs are read, so the order in
* which the registers are read (MSB first, then LSB) is
* important! */
for (ix = 0; ix < ARRAY_SIZE(lsb); ix++) {
lsb[ix] = dme1737_read(client,
DME1737_REG_IN_TEMP_LSB(ix));
}
for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
data->in[ix] |= (lsb[DME1737_REG_IN_LSB[ix]] <<
DME1737_REG_IN_LSB_SHL[ix]) & 0xf0;
}
for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
data->temp[ix] |= (lsb[DME1737_REG_TEMP_LSB[ix]] <<
DME1737_REG_TEMP_LSB_SHL[ix]) & 0xf0;
}
/* Fan registers */
for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
/* Skip reading registers if optional fans are not
* present */
if (!(data->has_fan & (1 << ix))) {
continue;
}
data->fan[ix] = dme1737_read(client,
DME1737_REG_FAN(ix));
data->fan[ix] |= dme1737_read(client,
DME1737_REG_FAN(ix) + 1) << 8;
data->fan_min[ix] = dme1737_read(client,
DME1737_REG_FAN_MIN(ix));
data->fan_min[ix] |= dme1737_read(client,
DME1737_REG_FAN_MIN(ix) + 1) << 8;
data->fan_opt[ix] = dme1737_read(client,
DME1737_REG_FAN_OPT(ix));
/* fan_max exists only for fan[5-6] */
if (ix > 3) {
data->fan_max[ix - 4] = dme1737_read(client,
DME1737_REG_FAN_MAX(ix));
}
}
/* PWM registers */
for (ix = 0; ix < ARRAY_SIZE(data->pwm); ix++) {
/* Skip reading registers if optional PWMs are not
* present */
if (!(data->has_pwm & (1 << ix))) {
continue;
}
data->pwm[ix] = dme1737_read(client,
DME1737_REG_PWM(ix));
data->pwm_freq[ix] = dme1737_read(client,
DME1737_REG_PWM_FREQ(ix));
/* pwm_config and pwm_min exist only for pwm[1-3] */
if (ix < 3) {
data->pwm_config[ix] = dme1737_read(client,
DME1737_REG_PWM_CONFIG(ix));
data->pwm_min[ix] = dme1737_read(client,
DME1737_REG_PWM_MIN(ix));
}
}
for (ix = 0; ix < ARRAY_SIZE(data->pwm_rr); ix++) {
data->pwm_rr[ix] = dme1737_read(client,
DME1737_REG_PWM_RR(ix));
}
/* Thermal zone registers */
for (ix = 0; ix < ARRAY_SIZE(data->zone_low); ix++) {
data->zone_low[ix] = dme1737_read(client,
DME1737_REG_ZONE_LOW(ix));
data->zone_abs[ix] = dme1737_read(client,
DME1737_REG_ZONE_ABS(ix));
}
for (ix = 0; ix < ARRAY_SIZE(data->zone_hyst); ix++) {
data->zone_hyst[ix] = dme1737_read(client,
DME1737_REG_ZONE_HYST(ix));
}
/* Alarm registers */
data->alarms = dme1737_read(client,
DME1737_REG_ALARM1);
/* Bit 7 tells us if the other alarm registers are non-zero and
* therefore also need to be read */
if (data->alarms & 0x80) {
data->alarms |= dme1737_read(client,
DME1737_REG_ALARM2) << 8;
data->alarms |= dme1737_read(client,
DME1737_REG_ALARM3) << 16;
}
/* The ISA chips require explicit clearing of alarm bits.
* Don't worry, an alarm will come back if the condition
* that causes it still exists */
if (!client->driver) {
if (data->alarms & 0xff0000) {
dme1737_write(client, DME1737_REG_ALARM3,
0xff);
}
if (data->alarms & 0xff00) {
dme1737_write(client, DME1737_REG_ALARM2,
0xff);
}
if (data->alarms & 0xff) {
dme1737_write(client, DME1737_REG_ALARM1,
0xff);
}
}
data->last_update = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
/* ---------------------------------------------------------------------
* Voltage sysfs attributes
* ix = [0-5]
* --------------------------------------------------------------------- */
#define SYS_IN_INPUT 0
#define SYS_IN_MIN 1
#define SYS_IN_MAX 2
#define SYS_IN_ALARM 3
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dme1737_update_device(dev);
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SYS_IN_INPUT:
res = IN_FROM_REG(data->in[ix], ix, 16);
break;
case SYS_IN_MIN:
res = IN_FROM_REG(data->in_min[ix], ix, 8);
break;
case SYS_IN_MAX:
res = IN_FROM_REG(data->in_max[ix], ix, 8);
break;
case SYS_IN_ALARM:
res = (data->alarms >> DME1737_BIT_ALARM_IN[ix]) & 0x01;
break;
default:
res = 0;
dev_dbg(dev, "Unknown function %d.\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_in(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SYS_IN_MIN:
data->in_min[ix] = IN_TO_REG(val, ix);
dme1737_write(client, DME1737_REG_IN_MIN(ix),
data->in_min[ix]);
break;
case SYS_IN_MAX:
data->in_max[ix] = IN_TO_REG(val, ix);
dme1737_write(client, DME1737_REG_IN_MAX(ix),
data->in_max[ix]);
break;
default:
dev_dbg(dev, "Unknown function %d.\n", fn);
}
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Temperature sysfs attributes
* ix = [0-2]
* --------------------------------------------------------------------- */
#define SYS_TEMP_INPUT 0
#define SYS_TEMP_MIN 1
#define SYS_TEMP_MAX 2
#define SYS_TEMP_OFFSET 3
#define SYS_TEMP_ALARM 4
#define SYS_TEMP_FAULT 5
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dme1737_update_device(dev);
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SYS_TEMP_INPUT:
res = TEMP_FROM_REG(data->temp[ix], 16);
break;
case SYS_TEMP_MIN:
res = TEMP_FROM_REG(data->temp_min[ix], 8);
break;
case SYS_TEMP_MAX:
res = TEMP_FROM_REG(data->temp_max[ix], 8);
break;
case SYS_TEMP_OFFSET:
res = TEMP_FROM_REG(data->temp_offset[ix], 8);
break;
case SYS_TEMP_ALARM:
res = (data->alarms >> DME1737_BIT_ALARM_TEMP[ix]) & 0x01;
break;
case SYS_TEMP_FAULT:
res = (((u16)data->temp[ix] & 0xff00) == 0x8000);
break;
default:
res = 0;
dev_dbg(dev, "Unknown function %d.\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SYS_TEMP_MIN:
data->temp_min[ix] = TEMP_TO_REG(val);
dme1737_write(client, DME1737_REG_TEMP_MIN(ix),
data->temp_min[ix]);
break;
case SYS_TEMP_MAX:
data->temp_max[ix] = TEMP_TO_REG(val);
dme1737_write(client, DME1737_REG_TEMP_MAX(ix),
data->temp_max[ix]);
break;
case SYS_TEMP_OFFSET:
data->temp_offset[ix] = TEMP_TO_REG(val);
dme1737_write(client, DME1737_REG_TEMP_OFFSET(ix),
data->temp_offset[ix]);
break;
default:
dev_dbg(dev, "Unknown function %d.\n", fn);
}
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Zone sysfs attributes
* ix = [0-2]
* --------------------------------------------------------------------- */
#define SYS_ZONE_AUTO_CHANNELS_TEMP 0
#define SYS_ZONE_AUTO_POINT1_TEMP_HYST 1
#define SYS_ZONE_AUTO_POINT1_TEMP 2
#define SYS_ZONE_AUTO_POINT2_TEMP 3
#define SYS_ZONE_AUTO_POINT3_TEMP 4
static ssize_t show_zone(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dme1737_update_device(dev);
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SYS_ZONE_AUTO_CHANNELS_TEMP:
/* check config2 for non-standard temp-to-zone mapping */
if ((ix == 1) && (data->config2 & 0x02)) {
res = 4;
} else {
res = 1 << ix;
}
break;
case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
res = TEMP_FROM_REG(data->zone_low[ix], 8) -
TEMP_HYST_FROM_REG(data->zone_hyst[ix == 2], ix);
break;
case SYS_ZONE_AUTO_POINT1_TEMP:
res = TEMP_FROM_REG(data->zone_low[ix], 8);
break;
case SYS_ZONE_AUTO_POINT2_TEMP:
/* pwm_freq holds the temp range bits in the upper nibble */
res = TEMP_FROM_REG(data->zone_low[ix], 8) +
TEMP_RANGE_FROM_REG(data->pwm_freq[ix]);
break;
case SYS_ZONE_AUTO_POINT3_TEMP:
res = TEMP_FROM_REG(data->zone_abs[ix], 8);
break;
default:
res = 0;
dev_dbg(dev, "Unknown function %d.\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_zone(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
/* Refresh the cache */
data->zone_low[ix] = dme1737_read(client,
DME1737_REG_ZONE_LOW(ix));
/* Modify the temp hyst value */
data->zone_hyst[ix == 2] = TEMP_HYST_TO_REG(
TEMP_FROM_REG(data->zone_low[ix], 8) -
val, ix, dme1737_read(client,
DME1737_REG_ZONE_HYST(ix == 2)));
dme1737_write(client, DME1737_REG_ZONE_HYST(ix == 2),
data->zone_hyst[ix == 2]);
break;
case SYS_ZONE_AUTO_POINT1_TEMP:
data->zone_low[ix] = TEMP_TO_REG(val);
dme1737_write(client, DME1737_REG_ZONE_LOW(ix),
data->zone_low[ix]);
break;
case SYS_ZONE_AUTO_POINT2_TEMP:
/* Refresh the cache */
data->zone_low[ix] = dme1737_read(client,
DME1737_REG_ZONE_LOW(ix));
/* Modify the temp range value (which is stored in the upper
* nibble of the pwm_freq register) */
data->pwm_freq[ix] = TEMP_RANGE_TO_REG(val -
TEMP_FROM_REG(data->zone_low[ix], 8),
dme1737_read(client,
DME1737_REG_PWM_FREQ(ix)));
dme1737_write(client, DME1737_REG_PWM_FREQ(ix),
data->pwm_freq[ix]);
break;
case SYS_ZONE_AUTO_POINT3_TEMP:
data->zone_abs[ix] = TEMP_TO_REG(val);
dme1737_write(client, DME1737_REG_ZONE_ABS(ix),
data->zone_abs[ix]);
break;
default:
dev_dbg(dev, "Unknown function %d.\n", fn);
}
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Fan sysfs attributes
* ix = [0-5]
* --------------------------------------------------------------------- */
#define SYS_FAN_INPUT 0
#define SYS_FAN_MIN 1
#define SYS_FAN_MAX 2
#define SYS_FAN_ALARM 3
#define SYS_FAN_TYPE 4
static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dme1737_update_device(dev);
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SYS_FAN_INPUT:
res = FAN_FROM_REG(data->fan[ix],
ix < 4 ? 0 :
FAN_TPC_FROM_REG(data->fan_opt[ix]));
break;
case SYS_FAN_MIN:
res = FAN_FROM_REG(data->fan_min[ix],
ix < 4 ? 0 :
FAN_TPC_FROM_REG(data->fan_opt[ix]));
break;
case SYS_FAN_MAX:
/* only valid for fan[5-6] */
res = FAN_MAX_FROM_REG(data->fan_max[ix - 4]);
break;
case SYS_FAN_ALARM:
res = (data->alarms >> DME1737_BIT_ALARM_FAN[ix]) & 0x01;
break;
case SYS_FAN_TYPE:
/* only valid for fan[1-4] */
res = FAN_TYPE_FROM_REG(data->fan_opt[ix]);
break;
default:
res = 0;
dev_dbg(dev, "Unknown function %d.\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SYS_FAN_MIN:
if (ix < 4) {
data->fan_min[ix] = FAN_TO_REG(val, 0);
} else {
/* Refresh the cache */
data->fan_opt[ix] = dme1737_read(client,
DME1737_REG_FAN_OPT(ix));
/* Modify the fan min value */
data->fan_min[ix] = FAN_TO_REG(val,
FAN_TPC_FROM_REG(data->fan_opt[ix]));
}
dme1737_write(client, DME1737_REG_FAN_MIN(ix),
data->fan_min[ix] & 0xff);
dme1737_write(client, DME1737_REG_FAN_MIN(ix) + 1,
data->fan_min[ix] >> 8);
break;
case SYS_FAN_MAX:
/* Only valid for fan[5-6] */
data->fan_max[ix - 4] = FAN_MAX_TO_REG(val);
dme1737_write(client, DME1737_REG_FAN_MAX(ix),
data->fan_max[ix - 4]);
break;
case SYS_FAN_TYPE:
/* Only valid for fan[1-4] */
if (!(val == 1 || val == 2 || val == 4)) {
count = -EINVAL;
dev_warn(dev, "Fan type value %ld not "
"supported. Choose one of 1, 2, or 4.\n",
val);
goto exit;
}
data->fan_opt[ix] = FAN_TYPE_TO_REG(val, dme1737_read(client,
DME1737_REG_FAN_OPT(ix)));
dme1737_write(client, DME1737_REG_FAN_OPT(ix),
data->fan_opt[ix]);
break;
default:
dev_dbg(dev, "Unknown function %d.\n", fn);
}
exit:
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* PWM sysfs attributes
* ix = [0-4]
* --------------------------------------------------------------------- */
#define SYS_PWM 0
#define SYS_PWM_FREQ 1
#define SYS_PWM_ENABLE 2
#define SYS_PWM_RAMP_RATE 3
#define SYS_PWM_AUTO_CHANNELS_ZONE 4
#define SYS_PWM_AUTO_PWM_MIN 5
#define SYS_PWM_AUTO_POINT1_PWM 6
#define SYS_PWM_AUTO_POINT2_PWM 7
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dme1737_update_device(dev);
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SYS_PWM:
if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 0) {
res = 255;
} else {
res = data->pwm[ix];
}
break;
case SYS_PWM_FREQ:
res = PWM_FREQ_FROM_REG(data->pwm_freq[ix]);
break;
case SYS_PWM_ENABLE:
if (ix > 3) {
res = 1; /* pwm[5-6] hard-wired to manual mode */
} else {
res = PWM_EN_FROM_REG(data->pwm_config[ix]);
}
break;
case SYS_PWM_RAMP_RATE:
/* Only valid for pwm[1-3] */
res = PWM_RR_FROM_REG(data->pwm_rr[ix > 0], ix);
break;
case SYS_PWM_AUTO_CHANNELS_ZONE:
/* Only valid for pwm[1-3] */
if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
res = PWM_ACZ_FROM_REG(data->pwm_config[ix]);
} else {
res = data->pwm_acz[ix];
}
break;
case SYS_PWM_AUTO_PWM_MIN:
/* Only valid for pwm[1-3] */
if (PWM_OFF_FROM_REG(data->pwm_rr[0], ix)) {
res = data->pwm_min[ix];
} else {
res = 0;
}
break;
case SYS_PWM_AUTO_POINT1_PWM:
/* Only valid for pwm[1-3] */
res = data->pwm_min[ix];
break;
case SYS_PWM_AUTO_POINT2_PWM:
/* Only valid for pwm[1-3] */
res = 255; /* hard-wired */
break;
default:
res = 0;
dev_dbg(dev, "Unknown function %d.\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static struct attribute *dme1737_attr_pwm[];
static void dme1737_chmod_file(struct device*, struct attribute*, mode_t);
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SYS_PWM:
data->pwm[ix] = SENSORS_LIMIT(val, 0, 255);
dme1737_write(client, DME1737_REG_PWM(ix), data->pwm[ix]);
break;
case SYS_PWM_FREQ:
data->pwm_freq[ix] = PWM_FREQ_TO_REG(val, dme1737_read(client,
DME1737_REG_PWM_FREQ(ix)));
dme1737_write(client, DME1737_REG_PWM_FREQ(ix),
data->pwm_freq[ix]);
break;
case SYS_PWM_ENABLE:
/* Only valid for pwm[1-3] */
if (val < 0 || val > 2) {
count = -EINVAL;
dev_warn(dev, "PWM enable %ld not "
"supported. Choose one of 0, 1, or 2.\n",
val);
goto exit;
}
/* Refresh the cache */
data->pwm_config[ix] = dme1737_read(client,
DME1737_REG_PWM_CONFIG(ix));
if (val == PWM_EN_FROM_REG(data->pwm_config[ix])) {
/* Bail out if no change */
goto exit;
}
/* Do some housekeeping if we are currently in auto mode */
if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
/* Save the current zone channel assignment */
data->pwm_acz[ix] = PWM_ACZ_FROM_REG(
data->pwm_config[ix]);
/* Save the current ramp rate state and disable it */
data->pwm_rr[ix > 0] = dme1737_read(client,
DME1737_REG_PWM_RR(ix > 0));
data->pwm_rr_en &= ~(1 << ix);
if (PWM_RR_EN_FROM_REG(data->pwm_rr[ix > 0], ix)) {
data->pwm_rr_en |= (1 << ix);
data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(0, ix,
data->pwm_rr[ix > 0]);
dme1737_write(client,
DME1737_REG_PWM_RR(ix > 0),
data->pwm_rr[ix > 0]);
}
}
/* Set the new PWM mode */
switch (val) {
case 0:
/* Change permissions of pwm[ix] to read-only */
dme1737_chmod_file(dev, dme1737_attr_pwm[ix],
S_IRUGO);
/* Turn fan fully on */
data->pwm_config[ix] = PWM_EN_TO_REG(0,
data->pwm_config[ix]);
dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
break;
case 1:
/* Turn on manual mode */
data->pwm_config[ix] = PWM_EN_TO_REG(1,
data->pwm_config[ix]);
dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
/* Change permissions of pwm[ix] to read-writeable */
dme1737_chmod_file(dev, dme1737_attr_pwm[ix],
S_IRUGO | S_IWUSR);
break;
case 2:
/* Change permissions of pwm[ix] to read-only */
dme1737_chmod_file(dev, dme1737_attr_pwm[ix],
S_IRUGO);
/* Turn on auto mode using the saved zone channel
* assignment */
data->pwm_config[ix] = PWM_ACZ_TO_REG(
data->pwm_acz[ix],
data->pwm_config[ix]);
dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
/* Enable PWM ramp rate if previously enabled */
if (data->pwm_rr_en & (1 << ix)) {
data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(1, ix,
dme1737_read(client,
DME1737_REG_PWM_RR(ix > 0)));
dme1737_write(client,
DME1737_REG_PWM_RR(ix > 0),
data->pwm_rr[ix > 0]);
}
break;
}
break;
case SYS_PWM_RAMP_RATE:
/* Only valid for pwm[1-3] */
/* Refresh the cache */
data->pwm_config[ix] = dme1737_read(client,
DME1737_REG_PWM_CONFIG(ix));
data->pwm_rr[ix > 0] = dme1737_read(client,
DME1737_REG_PWM_RR(ix > 0));
/* Set the ramp rate value */
if (val > 0) {
data->pwm_rr[ix > 0] = PWM_RR_TO_REG(val, ix,
data->pwm_rr[ix > 0]);
}
/* Enable/disable the feature only if the associated PWM
* output is in automatic mode. */
if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(val > 0, ix,
data->pwm_rr[ix > 0]);
}
dme1737_write(client, DME1737_REG_PWM_RR(ix > 0),
data->pwm_rr[ix > 0]);
break;
case SYS_PWM_AUTO_CHANNELS_ZONE:
/* Only valid for pwm[1-3] */
if (!(val == 1 || val == 2 || val == 4 ||
val == 6 || val == 7)) {
count = -EINVAL;
dev_warn(dev, "PWM auto channels zone %ld "
"not supported. Choose one of 1, 2, 4, 6, "
"or 7.\n", val);
goto exit;
}
/* Refresh the cache */
data->pwm_config[ix] = dme1737_read(client,
DME1737_REG_PWM_CONFIG(ix));
if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
/* PWM is already in auto mode so update the temp
* channel assignment */
data->pwm_config[ix] = PWM_ACZ_TO_REG(val,
data->pwm_config[ix]);
dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
} else {
/* PWM is not in auto mode so we save the temp
* channel assignment for later use */
data->pwm_acz[ix] = val;
}
break;
case SYS_PWM_AUTO_PWM_MIN:
/* Only valid for pwm[1-3] */
/* Refresh the cache */
data->pwm_min[ix] = dme1737_read(client,
DME1737_REG_PWM_MIN(ix));
/* There are only 2 values supported for the auto_pwm_min
* value: 0 or auto_point1_pwm. So if the temperature drops
* below the auto_point1_temp_hyst value, the fan either turns
* off or runs at auto_point1_pwm duty-cycle. */
if (val > ((data->pwm_min[ix] + 1) / 2)) {
data->pwm_rr[0] = PWM_OFF_TO_REG(1, ix,
dme1737_read(client,
DME1737_REG_PWM_RR(0)));
} else {
data->pwm_rr[0] = PWM_OFF_TO_REG(0, ix,
dme1737_read(client,
DME1737_REG_PWM_RR(0)));
}
dme1737_write(client, DME1737_REG_PWM_RR(0),
data->pwm_rr[0]);
break;
case SYS_PWM_AUTO_POINT1_PWM:
/* Only valid for pwm[1-3] */
data->pwm_min[ix] = SENSORS_LIMIT(val, 0, 255);
dme1737_write(client, DME1737_REG_PWM_MIN(ix),
data->pwm_min[ix]);
break;
default:
dev_dbg(dev, "Unknown function %d.\n", fn);
}
exit:
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Miscellaneous sysfs attributes
* --------------------------------------------------------------------- */
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct dme1737_data *data = i2c_get_clientdata(client);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
long val = simple_strtol(buf, NULL, 10);
data->vrm = val;
return count;
}
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dme1737_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static ssize_t show_name(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dme1737_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->client.name);
}
/* ---------------------------------------------------------------------
* Sysfs device attribute defines and structs
* --------------------------------------------------------------------- */
/* Voltages 0-6 */
#define SENSOR_DEVICE_ATTR_IN(ix) \
static SENSOR_DEVICE_ATTR_2(in##ix##_input, S_IRUGO, \
show_in, NULL, SYS_IN_INPUT, ix); \
static SENSOR_DEVICE_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
show_in, set_in, SYS_IN_MIN, ix); \
static SENSOR_DEVICE_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
show_in, set_in, SYS_IN_MAX, ix); \
static SENSOR_DEVICE_ATTR_2(in##ix##_alarm, S_IRUGO, \
show_in, NULL, SYS_IN_ALARM, ix)
SENSOR_DEVICE_ATTR_IN(0);
SENSOR_DEVICE_ATTR_IN(1);
SENSOR_DEVICE_ATTR_IN(2);
SENSOR_DEVICE_ATTR_IN(3);
SENSOR_DEVICE_ATTR_IN(4);
SENSOR_DEVICE_ATTR_IN(5);
SENSOR_DEVICE_ATTR_IN(6);
/* Temperatures 1-3 */
#define SENSOR_DEVICE_ATTR_TEMP(ix) \
static SENSOR_DEVICE_ATTR_2(temp##ix##_input, S_IRUGO, \
show_temp, NULL, SYS_TEMP_INPUT, ix-1); \
static SENSOR_DEVICE_ATTR_2(temp##ix##_min, S_IRUGO | S_IWUSR, \
show_temp, set_temp, SYS_TEMP_MIN, ix-1); \
static SENSOR_DEVICE_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
show_temp, set_temp, SYS_TEMP_MAX, ix-1); \
static SENSOR_DEVICE_ATTR_2(temp##ix##_offset, S_IRUGO, \
show_temp, set_temp, SYS_TEMP_OFFSET, ix-1); \
static SENSOR_DEVICE_ATTR_2(temp##ix##_alarm, S_IRUGO, \
show_temp, NULL, SYS_TEMP_ALARM, ix-1); \
static SENSOR_DEVICE_ATTR_2(temp##ix##_fault, S_IRUGO, \
show_temp, NULL, SYS_TEMP_FAULT, ix-1)
SENSOR_DEVICE_ATTR_TEMP(1);
SENSOR_DEVICE_ATTR_TEMP(2);
SENSOR_DEVICE_ATTR_TEMP(3);
/* Zones 1-3 */
#define SENSOR_DEVICE_ATTR_ZONE(ix) \
static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_channels_temp, S_IRUGO, \
show_zone, NULL, SYS_ZONE_AUTO_CHANNELS_TEMP, ix-1); \
static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point1_temp_hyst, S_IRUGO, \
show_zone, set_zone, SYS_ZONE_AUTO_POINT1_TEMP_HYST, ix-1); \
static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point1_temp, S_IRUGO, \
show_zone, set_zone, SYS_ZONE_AUTO_POINT1_TEMP, ix-1); \
static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point2_temp, S_IRUGO, \
show_zone, set_zone, SYS_ZONE_AUTO_POINT2_TEMP, ix-1); \
static SENSOR_DEVICE_ATTR_2(zone##ix##_auto_point3_temp, S_IRUGO, \
show_zone, set_zone, SYS_ZONE_AUTO_POINT3_TEMP, ix-1)
SENSOR_DEVICE_ATTR_ZONE(1);
SENSOR_DEVICE_ATTR_ZONE(2);
SENSOR_DEVICE_ATTR_ZONE(3);
/* Fans 1-4 */
#define SENSOR_DEVICE_ATTR_FAN_1TO4(ix) \
static SENSOR_DEVICE_ATTR_2(fan##ix##_input, S_IRUGO, \
show_fan, NULL, SYS_FAN_INPUT, ix-1); \
static SENSOR_DEVICE_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
show_fan, set_fan, SYS_FAN_MIN, ix-1); \
static SENSOR_DEVICE_ATTR_2(fan##ix##_alarm, S_IRUGO, \
show_fan, NULL, SYS_FAN_ALARM, ix-1); \
static SENSOR_DEVICE_ATTR_2(fan##ix##_type, S_IRUGO | S_IWUSR, \
show_fan, set_fan, SYS_FAN_TYPE, ix-1)
SENSOR_DEVICE_ATTR_FAN_1TO4(1);
SENSOR_DEVICE_ATTR_FAN_1TO4(2);
SENSOR_DEVICE_ATTR_FAN_1TO4(3);
SENSOR_DEVICE_ATTR_FAN_1TO4(4);
/* Fans 5-6 */
#define SENSOR_DEVICE_ATTR_FAN_5TO6(ix) \
static SENSOR_DEVICE_ATTR_2(fan##ix##_input, S_IRUGO, \
show_fan, NULL, SYS_FAN_INPUT, ix-1); \
static SENSOR_DEVICE_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
show_fan, set_fan, SYS_FAN_MIN, ix-1); \
static SENSOR_DEVICE_ATTR_2(fan##ix##_alarm, S_IRUGO, \
show_fan, NULL, SYS_FAN_ALARM, ix-1); \
static SENSOR_DEVICE_ATTR_2(fan##ix##_max, S_IRUGO | S_IWUSR, \
show_fan, set_fan, SYS_FAN_MAX, ix-1)
SENSOR_DEVICE_ATTR_FAN_5TO6(5);
SENSOR_DEVICE_ATTR_FAN_5TO6(6);
/* PWMs 1-3 */
#define SENSOR_DEVICE_ATTR_PWM_1TO3(ix) \
static SENSOR_DEVICE_ATTR_2(pwm##ix, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_freq, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM_FREQ, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_enable, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM_ENABLE, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_ramp_rate, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM_RAMP_RATE, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_channels_zone, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM_AUTO_CHANNELS_ZONE, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_pwm_min, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM_AUTO_PWM_MIN, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_point1_pwm, S_IRUGO, \
show_pwm, set_pwm, SYS_PWM_AUTO_POINT1_PWM, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_auto_point2_pwm, S_IRUGO, \
show_pwm, NULL, SYS_PWM_AUTO_POINT2_PWM, ix-1)
SENSOR_DEVICE_ATTR_PWM_1TO3(1);
SENSOR_DEVICE_ATTR_PWM_1TO3(2);
SENSOR_DEVICE_ATTR_PWM_1TO3(3);
/* PWMs 5-6 */
#define SENSOR_DEVICE_ATTR_PWM_5TO6(ix) \
static SENSOR_DEVICE_ATTR_2(pwm##ix, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, SYS_PWM, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, SYS_PWM_FREQ, ix-1); \
static SENSOR_DEVICE_ATTR_2(pwm##ix##_enable, S_IRUGO, \
show_pwm, NULL, SYS_PWM_ENABLE, ix-1)
SENSOR_DEVICE_ATTR_PWM_5TO6(5);
SENSOR_DEVICE_ATTR_PWM_5TO6(6);
/* Misc */
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); /* for ISA devices */
#define SENSOR_DEV_ATTR_IN(ix) \
&sensor_dev_attr_in##ix##_input.dev_attr.attr, \
&sensor_dev_attr_in##ix##_min.dev_attr.attr, \
&sensor_dev_attr_in##ix##_max.dev_attr.attr, \
&sensor_dev_attr_in##ix##_alarm.dev_attr.attr
/* These attributes are read-writeable only if the chip is *not* locked */
#define SENSOR_DEV_ATTR_TEMP_LOCK(ix) \
&sensor_dev_attr_temp##ix##_offset.dev_attr.attr
#define SENSOR_DEV_ATTR_TEMP(ix) \
SENSOR_DEV_ATTR_TEMP_LOCK(ix), \
&sensor_dev_attr_temp##ix##_input.dev_attr.attr, \
&sensor_dev_attr_temp##ix##_min.dev_attr.attr, \
&sensor_dev_attr_temp##ix##_max.dev_attr.attr, \
&sensor_dev_attr_temp##ix##_alarm.dev_attr.attr, \
&sensor_dev_attr_temp##ix##_fault.dev_attr.attr
/* These attributes are read-writeable only if the chip is *not* locked */
#define SENSOR_DEV_ATTR_ZONE_LOCK(ix) \
&sensor_dev_attr_zone##ix##_auto_point1_temp_hyst.dev_attr.attr, \
&sensor_dev_attr_zone##ix##_auto_point1_temp.dev_attr.attr, \
&sensor_dev_attr_zone##ix##_auto_point2_temp.dev_attr.attr, \
&sensor_dev_attr_zone##ix##_auto_point3_temp.dev_attr.attr
#define SENSOR_DEV_ATTR_ZONE(ix) \
SENSOR_DEV_ATTR_ZONE_LOCK(ix), \
&sensor_dev_attr_zone##ix##_auto_channels_temp.dev_attr.attr
#define SENSOR_DEV_ATTR_FAN_1TO4(ix) \
&sensor_dev_attr_fan##ix##_input.dev_attr.attr, \
&sensor_dev_attr_fan##ix##_min.dev_attr.attr, \
&sensor_dev_attr_fan##ix##_alarm.dev_attr.attr, \
&sensor_dev_attr_fan##ix##_type.dev_attr.attr
#define SENSOR_DEV_ATTR_FAN_5TO6(ix) \
&sensor_dev_attr_fan##ix##_input.dev_attr.attr, \
&sensor_dev_attr_fan##ix##_min.dev_attr.attr, \
&sensor_dev_attr_fan##ix##_alarm.dev_attr.attr, \
&sensor_dev_attr_fan##ix##_max.dev_attr.attr
/* These attributes are read-writeable only if the chip is *not* locked */
#define SENSOR_DEV_ATTR_PWM_1TO3_LOCK(ix) \
&sensor_dev_attr_pwm##ix##_freq.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_enable.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_ramp_rate.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_auto_channels_zone.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_auto_pwm_min.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_auto_point1_pwm.dev_attr.attr
#define SENSOR_DEV_ATTR_PWM_1TO3(ix) \
SENSOR_DEV_ATTR_PWM_1TO3_LOCK(ix), \
&sensor_dev_attr_pwm##ix.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_auto_point2_pwm.dev_attr.attr
/* These attributes are read-writeable only if the chip is *not* locked */
#define SENSOR_DEV_ATTR_PWM_5TO6_LOCK(ix) \
&sensor_dev_attr_pwm##ix.dev_attr.attr, \
&sensor_dev_attr_pwm##ix##_freq.dev_attr.attr
#define SENSOR_DEV_ATTR_PWM_5TO6(ix) \
SENSOR_DEV_ATTR_PWM_5TO6_LOCK(ix), \
&sensor_dev_attr_pwm##ix##_enable.dev_attr.attr
/* This struct holds all the attributes that are always present and need to be
* created unconditionally. The attributes that need modification of their
* permissions are created read-only and write permissions are added or removed
* on the fly when required */
static struct attribute *dme1737_attr[] ={
/* Voltages */
SENSOR_DEV_ATTR_IN(0),
SENSOR_DEV_ATTR_IN(1),
SENSOR_DEV_ATTR_IN(2),
SENSOR_DEV_ATTR_IN(3),
SENSOR_DEV_ATTR_IN(4),
SENSOR_DEV_ATTR_IN(5),
SENSOR_DEV_ATTR_IN(6),
/* Temperatures */
SENSOR_DEV_ATTR_TEMP(1),
SENSOR_DEV_ATTR_TEMP(2),
SENSOR_DEV_ATTR_TEMP(3),
/* Zones */
SENSOR_DEV_ATTR_ZONE(1),
SENSOR_DEV_ATTR_ZONE(2),
SENSOR_DEV_ATTR_ZONE(3),
/* Misc */
&dev_attr_vrm.attr,
&dev_attr_cpu0_vid.attr,
NULL
};
static const struct attribute_group dme1737_group = {
.attrs = dme1737_attr,
};
/* The following structs hold the PWM attributes, some of which are optional.
* Their creation depends on the chip configuration which is determined during
* module load. */
static struct attribute *dme1737_attr_pwm1[] = {
SENSOR_DEV_ATTR_PWM_1TO3(1),
NULL
};
static struct attribute *dme1737_attr_pwm2[] = {
SENSOR_DEV_ATTR_PWM_1TO3(2),
NULL
};
static struct attribute *dme1737_attr_pwm3[] = {
SENSOR_DEV_ATTR_PWM_1TO3(3),
NULL
};
static struct attribute *dme1737_attr_pwm5[] = {
SENSOR_DEV_ATTR_PWM_5TO6(5),
NULL
};
static struct attribute *dme1737_attr_pwm6[] = {
SENSOR_DEV_ATTR_PWM_5TO6(6),
NULL
};
static const struct attribute_group dme1737_pwm_group[] = {
{ .attrs = dme1737_attr_pwm1 },
{ .attrs = dme1737_attr_pwm2 },
{ .attrs = dme1737_attr_pwm3 },
{ .attrs = NULL },
{ .attrs = dme1737_attr_pwm5 },
{ .attrs = dme1737_attr_pwm6 },
};
/* The following structs hold the fan attributes, some of which are optional.
* Their creation depends on the chip configuration which is determined during
* module load. */
static struct attribute *dme1737_attr_fan1[] = {
SENSOR_DEV_ATTR_FAN_1TO4(1),
NULL
};
static struct attribute *dme1737_attr_fan2[] = {
SENSOR_DEV_ATTR_FAN_1TO4(2),
NULL
};
static struct attribute *dme1737_attr_fan3[] = {
SENSOR_DEV_ATTR_FAN_1TO4(3),
NULL
};
static struct attribute *dme1737_attr_fan4[] = {
SENSOR_DEV_ATTR_FAN_1TO4(4),
NULL
};
static struct attribute *dme1737_attr_fan5[] = {
SENSOR_DEV_ATTR_FAN_5TO6(5),
NULL
};
static struct attribute *dme1737_attr_fan6[] = {
SENSOR_DEV_ATTR_FAN_5TO6(6),
NULL
};
static const struct attribute_group dme1737_fan_group[] = {
{ .attrs = dme1737_attr_fan1 },
{ .attrs = dme1737_attr_fan2 },
{ .attrs = dme1737_attr_fan3 },
{ .attrs = dme1737_attr_fan4 },
{ .attrs = dme1737_attr_fan5 },
{ .attrs = dme1737_attr_fan6 },
};
/* The permissions of all of the following attributes are changed to read-
* writeable if the chip is *not* locked. Otherwise they stay read-only. */
static struct attribute *dme1737_attr_lock[] = {
/* Temperatures */
SENSOR_DEV_ATTR_TEMP_LOCK(1),
SENSOR_DEV_ATTR_TEMP_LOCK(2),
SENSOR_DEV_ATTR_TEMP_LOCK(3),
/* Zones */
SENSOR_DEV_ATTR_ZONE_LOCK(1),
SENSOR_DEV_ATTR_ZONE_LOCK(2),
SENSOR_DEV_ATTR_ZONE_LOCK(3),
NULL
};
static const struct attribute_group dme1737_lock_group = {
.attrs = dme1737_attr_lock,
};
/* The permissions of the following PWM attributes are changed to read-
* writeable if the chip is *not* locked and the respective PWM is available.
* Otherwise they stay read-only. */
static struct attribute *dme1737_attr_pwm1_lock[] = {
SENSOR_DEV_ATTR_PWM_1TO3_LOCK(1),
NULL
};
static struct attribute *dme1737_attr_pwm2_lock[] = {
SENSOR_DEV_ATTR_PWM_1TO3_LOCK(2),
NULL
};
static struct attribute *dme1737_attr_pwm3_lock[] = {
SENSOR_DEV_ATTR_PWM_1TO3_LOCK(3),
NULL
};
static struct attribute *dme1737_attr_pwm5_lock[] = {
SENSOR_DEV_ATTR_PWM_5TO6_LOCK(5),
NULL
};
static struct attribute *dme1737_attr_pwm6_lock[] = {
SENSOR_DEV_ATTR_PWM_5TO6_LOCK(6),
NULL
};
static const struct attribute_group dme1737_pwm_lock_group[] = {
{ .attrs = dme1737_attr_pwm1_lock },
{ .attrs = dme1737_attr_pwm2_lock },
{ .attrs = dme1737_attr_pwm3_lock },
{ .attrs = NULL },
{ .attrs = dme1737_attr_pwm5_lock },
{ .attrs = dme1737_attr_pwm6_lock },
};
/* Pwm[1-3] are read-writeable if the associated pwm is in manual mode and the
* chip is not locked. Otherwise they are read-only. */
static struct attribute *dme1737_attr_pwm[] = {
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_pwm2.dev_attr.attr,
&sensor_dev_attr_pwm3.dev_attr.attr,
};
/* ---------------------------------------------------------------------
* Super-IO functions
* --------------------------------------------------------------------- */
static inline void dme1737_sio_enter(int sio_cip)
{
outb(0x55, sio_cip);
}
static inline void dme1737_sio_exit(int sio_cip)
{
outb(0xaa, sio_cip);
}
static inline int dme1737_sio_inb(int sio_cip, int reg)
{
outb(reg, sio_cip);
return inb(sio_cip + 1);
}
static inline void dme1737_sio_outb(int sio_cip, int reg, int val)
{
outb(reg, sio_cip);
outb(val, sio_cip + 1);
}
/* ---------------------------------------------------------------------
* Device initialization
* --------------------------------------------------------------------- */
static int dme1737_i2c_get_features(int, struct dme1737_data*);
static void dme1737_chmod_file(struct device *dev,
struct attribute *attr, mode_t mode)
{
if (sysfs_chmod_file(&dev->kobj, attr, mode)) {
dev_warn(dev, "Failed to change permissions of %s.\n",
attr->name);
}
}
static void dme1737_chmod_group(struct device *dev,
const struct attribute_group *group,
mode_t mode)
{
struct attribute **attr;
for (attr = group->attrs; *attr; attr++) {
dme1737_chmod_file(dev, *attr, mode);
}
}
static void dme1737_remove_files(struct device *dev)
{
struct dme1737_data *data = dev_get_drvdata(dev);
int ix;
for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
if (data->has_fan & (1 << ix)) {
sysfs_remove_group(&dev->kobj,
&dme1737_fan_group[ix]);
}
}
for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_group); ix++) {
if (data->has_pwm & (1 << ix)) {
sysfs_remove_group(&dev->kobj,
&dme1737_pwm_group[ix]);
}
}
sysfs_remove_group(&dev->kobj, &dme1737_group);
if (!data->client.driver) {
sysfs_remove_file(&dev->kobj, &dev_attr_name.attr);
}
}
static int dme1737_create_files(struct device *dev)
{
struct dme1737_data *data = dev_get_drvdata(dev);
int err, ix;
/* Create a name attribute for ISA devices */
if (!data->client.driver &&
(err = sysfs_create_file(&dev->kobj, &dev_attr_name.attr))) {
goto exit;
}
/* Create standard sysfs attributes */
if ((err = sysfs_create_group(&dev->kobj, &dme1737_group))) {
goto exit_remove;
}
/* Create fan sysfs attributes */
for (ix = 0; ix < ARRAY_SIZE(dme1737_fan_group); ix++) {
if (data->has_fan & (1 << ix)) {
if ((err = sysfs_create_group(&dev->kobj,
&dme1737_fan_group[ix]))) {
goto exit_remove;
}
}
}
/* Create PWM sysfs attributes */
for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_group); ix++) {
if (data->has_pwm & (1 << ix)) {
if ((err = sysfs_create_group(&dev->kobj,
&dme1737_pwm_group[ix]))) {
goto exit_remove;
}
}
}
/* Inform if the device is locked. Otherwise change the permissions of
* selected attributes from read-only to read-writeable. */
if (data->config & 0x02) {
dev_info(dev, "Device is locked. Some attributes "
"will be read-only.\n");
} else {
/* Change permissions of standard attributes */
dme1737_chmod_group(dev, &dme1737_lock_group,
S_IRUGO | S_IWUSR);
/* Change permissions of PWM attributes */
for (ix = 0; ix < ARRAY_SIZE(dme1737_pwm_lock_group); ix++) {
if (data->has_pwm & (1 << ix)) {
dme1737_chmod_group(dev,
&dme1737_pwm_lock_group[ix],
S_IRUGO | S_IWUSR);
}
}
/* Change permissions of pwm[1-3] if in manual mode */
for (ix = 0; ix < 3; ix++) {
if ((data->has_pwm & (1 << ix)) &&
(PWM_EN_FROM_REG(data->pwm_config[ix]) == 1)) {
dme1737_chmod_file(dev,
dme1737_attr_pwm[ix],
S_IRUGO | S_IWUSR);
}
}
}
return 0;
exit_remove:
dme1737_remove_files(dev);
exit:
return err;
}
static int dme1737_init_device(struct device *dev)
{
struct dme1737_data *data = dev_get_drvdata(dev);
struct i2c_client *client = &data->client;
int ix;
u8 reg;
data->config = dme1737_read(client, DME1737_REG_CONFIG);
/* Inform if part is not monitoring/started */
if (!(data->config & 0x01)) {
if (!force_start) {
dev_err(dev, "Device is not monitoring. "
"Use the force_start load parameter to "
"override.\n");
return -EFAULT;
}
/* Force monitoring */
data->config |= 0x01;
dme1737_write(client, DME1737_REG_CONFIG, data->config);
}
/* Inform if part is not ready */
if (!(data->config & 0x04)) {
dev_err(dev, "Device is not ready.\n");
return -EFAULT;
}
/* Determine which optional fan and pwm features are enabled/present */
if (client->driver) { /* I2C chip */
data->config2 = dme1737_read(client, DME1737_REG_CONFIG2);
/* Check if optional fan3 input is enabled */
if (data->config2 & 0x04) {
data->has_fan |= (1 << 2);
}
/* Fan4 and pwm3 are only available if the client's I2C address
* is the default 0x2e. Otherwise the I/Os associated with
* these functions are used for addr enable/select. */
if (data->client.addr == 0x2e) {
data->has_fan |= (1 << 3);
data->has_pwm |= (1 << 2);
}
/* Determine which of the optional fan[5-6] and pwm[5-6]
* features are enabled. For this, we need to query the runtime
* registers through the Super-IO LPC interface. Try both
* config ports 0x2e and 0x4e. */
if (dme1737_i2c_get_features(0x2e, data) &&
dme1737_i2c_get_features(0x4e, data)) {
dev_warn(dev, "Failed to query Super-IO for optional "
"features.\n");
}
} else { /* ISA chip */
/* Fan3 and pwm3 are always available. Fan[4-5] and pwm[5-6]
* don't exist in the ISA chip. */
data->has_fan |= (1 << 2);
data->has_pwm |= (1 << 2);
}
/* Fan1, fan2, pwm1, and pwm2 are always present */
data->has_fan |= 0x03;
data->has_pwm |= 0x03;
dev_info(dev, "Optional features: pwm3=%s, pwm5=%s, pwm6=%s, "
"fan3=%s, fan4=%s, fan5=%s, fan6=%s.\n",
(data->has_pwm & (1 << 2)) ? "yes" : "no",
(data->has_pwm & (1 << 4)) ? "yes" : "no",
(data->has_pwm & (1 << 5)) ? "yes" : "no",
(data->has_fan & (1 << 2)) ? "yes" : "no",
(data->has_fan & (1 << 3)) ? "yes" : "no",
(data->has_fan & (1 << 4)) ? "yes" : "no",
(data->has_fan & (1 << 5)) ? "yes" : "no");
reg = dme1737_read(client, DME1737_REG_TACH_PWM);
/* Inform if fan-to-pwm mapping differs from the default */
if (client->driver && reg != 0xa4) { /* I2C chip */
dev_warn(dev, "Non-standard fan to pwm mapping: "
"fan1->pwm%d, fan2->pwm%d, fan3->pwm%d, "
"fan4->pwm%d. Please report to the driver "
"maintainer.\n",
(reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
((reg >> 4) & 0x03) + 1, ((reg >> 6) & 0x03) + 1);
} else if (!client->driver && reg != 0x24) { /* ISA chip */
dev_warn(dev, "Non-standard fan to pwm mapping: "
"fan1->pwm%d, fan2->pwm%d, fan3->pwm%d. "
"Please report to the driver maintainer.\n",
(reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
((reg >> 4) & 0x03) + 1);
}
/* Switch pwm[1-3] to manual mode if they are currently disabled and
* set the duty-cycles to 0% (which is identical to the PWMs being
* disabled). */
if (!(data->config & 0x02)) {
for (ix = 0; ix < 3; ix++) {
data->pwm_config[ix] = dme1737_read(client,
DME1737_REG_PWM_CONFIG(ix));
if ((data->has_pwm & (1 << ix)) &&
(PWM_EN_FROM_REG(data->pwm_config[ix]) == -1)) {
dev_info(dev, "Switching pwm%d to "
"manual mode.\n", ix + 1);
data->pwm_config[ix] = PWM_EN_TO_REG(1,
data->pwm_config[ix]);
dme1737_write(client, DME1737_REG_PWM(ix), 0);
dme1737_write(client,
DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
}
}
}
/* Initialize the default PWM auto channels zone (acz) assignments */
data->pwm_acz[0] = 1; /* pwm1 -> zone1 */
data->pwm_acz[1] = 2; /* pwm2 -> zone2 */
data->pwm_acz[2] = 4; /* pwm3 -> zone3 */
/* Set VRM */
data->vrm = vid_which_vrm();
return 0;
}
/* ---------------------------------------------------------------------
* I2C device detection and registration
* --------------------------------------------------------------------- */
static struct i2c_driver dme1737_i2c_driver;
static int dme1737_i2c_get_features(int sio_cip, struct dme1737_data *data)
{
int err = 0, reg;
u16 addr;
dme1737_sio_enter(sio_cip);
/* Check device ID
* The DME1737 can return either 0x78 or 0x77 as its device ID. */
reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
if (!(reg == 0x77 || reg == 0x78)) {
err = -ENODEV;
goto exit;
}
/* Select logical device A (runtime registers) */
dme1737_sio_outb(sio_cip, 0x07, 0x0a);
/* Get the base address of the runtime registers */
if (!(addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
dme1737_sio_inb(sio_cip, 0x61))) {
err = -ENODEV;
goto exit;
}
/* Read the runtime registers to determine which optional features
* are enabled and available. Bits [3:2] of registers 0x43-0x46 are set
* to '10' if the respective feature is enabled. */
if ((inb(addr + 0x43) & 0x0c) == 0x08) { /* fan6 */
data->has_fan |= (1 << 5);
}
if ((inb(addr + 0x44) & 0x0c) == 0x08) { /* pwm6 */
data->has_pwm |= (1 << 5);
}
if ((inb(addr + 0x45) & 0x0c) == 0x08) { /* fan5 */
data->has_fan |= (1 << 4);
}
if ((inb(addr + 0x46) & 0x0c) == 0x08) { /* pwm5 */
data->has_pwm |= (1 << 4);
}
exit:
dme1737_sio_exit(sio_cip);
return err;
}
static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
int kind)
{
u8 company, verstep = 0;
struct i2c_client *client;
struct dme1737_data *data;
struct device *dev;
int err = 0;
const char *name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
goto exit;
}
if (!(data = kzalloc(sizeof(struct dme1737_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &dme1737_i2c_driver;
dev = &client->dev;
/* A negative kind means that the driver was loaded with no force
* parameter (default), so we must identify the chip. */
if (kind < 0) {
company = dme1737_read(client, DME1737_REG_COMPANY);
verstep = dme1737_read(client, DME1737_REG_VERSTEP);
if (!((company == DME1737_COMPANY_SMSC) &&
((verstep & DME1737_VERSTEP_MASK) == DME1737_VERSTEP))) {
err = -ENODEV;
goto exit_kfree;
}
}
kind = dme1737;
name = "dme1737";
/* Fill in the remaining client fields and put it into the global
* list */
strlcpy(client->name, name, I2C_NAME_SIZE);
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(client))) {
goto exit_kfree;
}
dev_info(dev, "Found a DME1737 chip at 0x%02x (rev 0x%02x).\n",
client->addr, verstep);
/* Initialize the DME1737 chip */
if ((err = dme1737_init_device(dev))) {
dev_err(dev, "Failed to initialize device.\n");
goto exit_detach;
}
/* Create sysfs files */
if ((err = dme1737_create_files(dev))) {
dev_err(dev, "Failed to create sysfs files.\n");
goto exit_detach;
}
/* Register device */
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
dev_err(dev, "Failed to register device.\n");
err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
return 0;
exit_remove:
dme1737_remove_files(dev);
exit_detach:
i2c_detach_client(client);
exit_kfree:
kfree(data);
exit:
return err;
}
static int dme1737_i2c_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON)) {
return 0;
}
return i2c_probe(adapter, &addr_data, dme1737_i2c_detect);
}
static int dme1737_i2c_detach_client(struct i2c_client *client)
{
struct dme1737_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
dme1737_remove_files(&client->dev);
if ((err = i2c_detach_client(client))) {
return err;
}
kfree(data);
return 0;
}
static struct i2c_driver dme1737_i2c_driver = {
.driver = {
.name = "dme1737",
},
.attach_adapter = dme1737_i2c_attach_adapter,
.detach_client = dme1737_i2c_detach_client,
};
/* ---------------------------------------------------------------------
* ISA device detection and registration
* --------------------------------------------------------------------- */
static int __init dme1737_isa_detect(int sio_cip, unsigned short *addr)
{
int err = 0, reg;
unsigned short base_addr;
dme1737_sio_enter(sio_cip);
/* Check device ID
* We currently know about SCH3112 (0x7c), SCH3114 (0x7d), and
* SCH3116 (0x7f). */
reg = force_id ? force_id : dme1737_sio_inb(sio_cip, 0x20);
if (!(reg == 0x7c || reg == 0x7d || reg == 0x7f)) {
err = -ENODEV;
goto exit;
}
/* Select logical device A (runtime registers) */
dme1737_sio_outb(sio_cip, 0x07, 0x0a);
/* Get the base address of the runtime registers */
if (!(base_addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
dme1737_sio_inb(sio_cip, 0x61))) {
printk(KERN_ERR "dme1737: Base address not set.\n");
err = -ENODEV;
goto exit;
}
/* Access to the hwmon registers is through an index/data register
* pair located at offset 0x70/0x71. */
*addr = base_addr + 0x70;
exit:
dme1737_sio_exit(sio_cip);
return err;
}
static int __init dme1737_isa_device_add(unsigned short addr)
{
struct resource res = {
.start = addr,
.end = addr + DME1737_EXTENT - 1,
.name = "dme1737",
.flags = IORESOURCE_IO,
};
int err;
if (!(pdev = platform_device_alloc("dme1737", addr))) {
printk(KERN_ERR "dme1737: Failed to allocate device.\n");
err = -ENOMEM;
goto exit;
}
if ((err = platform_device_add_resources(pdev, &res, 1))) {
printk(KERN_ERR "dme1737: Failed to add device resource "
"(err = %d).\n", err);
goto exit_device_put;
}
if ((err = platform_device_add(pdev))) {
printk(KERN_ERR "dme1737: Failed to add device (err = %d).\n",
err);
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(pdev);
pdev = NULL;
exit:
return err;
}
static int __devinit dme1737_isa_probe(struct platform_device *pdev)
{
u8 company, device;
struct resource *res;
struct i2c_client *client;
struct dme1737_data *data;
struct device *dev = &pdev->dev;
int err;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, DME1737_EXTENT, "dme1737")) {
dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
(unsigned short)res->start,
(unsigned short)res->start + DME1737_EXTENT - 1);
err = -EBUSY;
goto exit;
}
if (!(data = kzalloc(sizeof(struct dme1737_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit_release_region;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = res->start;
platform_set_drvdata(pdev, data);
company = dme1737_read(client, DME1737_REG_COMPANY);
device = dme1737_read(client, DME1737_REG_DEVICE);
if (!((company == DME1737_COMPANY_SMSC) &&
(device == SCH311X_DEVICE))) {
err = -ENODEV;
goto exit_kfree;
}
/* Fill in the remaining client fields and initialize the mutex */
strlcpy(client->name, "sch311x", I2C_NAME_SIZE);
mutex_init(&data->update_lock);
dev_info(dev, "Found a SCH311x chip at 0x%04x\n", client->addr);
/* Initialize the chip */
if ((err = dme1737_init_device(dev))) {
dev_err(dev, "Failed to initialize device.\n");
goto exit_kfree;
}
/* Create sysfs files */
if ((err = dme1737_create_files(dev))) {
dev_err(dev, "Failed to create sysfs files.\n");
goto exit_kfree;
}
/* Register device */
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
dev_err(dev, "Failed to register device.\n");
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
dme1737_remove_files(dev);
exit_kfree:
platform_set_drvdata(pdev, NULL);
kfree(data);
exit_release_region:
release_region(res->start, DME1737_EXTENT);
exit:
return err;
}
static int __devexit dme1737_isa_remove(struct platform_device *pdev)
{
struct dme1737_data *data = platform_get_drvdata(pdev);
hwmon_device_unregister(data->hwmon_dev);
dme1737_remove_files(&pdev->dev);
release_region(data->client.addr, DME1737_EXTENT);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
}
static struct platform_driver dme1737_isa_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "dme1737",
},
.probe = dme1737_isa_probe,
.remove = __devexit_p(dme1737_isa_remove),
};
/* ---------------------------------------------------------------------
* Module initialization and cleanup
* --------------------------------------------------------------------- */
static int __init dme1737_init(void)
{
int err;
unsigned short addr;
if ((err = i2c_add_driver(&dme1737_i2c_driver))) {
goto exit;
}
if (dme1737_isa_detect(0x2e, &addr) &&
dme1737_isa_detect(0x4e, &addr)) {
/* Return 0 if we didn't find an ISA device */
return 0;
}
if ((err = platform_driver_register(&dme1737_isa_driver))) {
goto exit_del_i2c_driver;
}
/* Sets global pdev as a side effect */
if ((err = dme1737_isa_device_add(addr))) {
goto exit_del_isa_driver;
}
return 0;
exit_del_isa_driver:
platform_driver_unregister(&dme1737_isa_driver);
exit_del_i2c_driver:
i2c_del_driver(&dme1737_i2c_driver);
exit:
return err;
}
static void __exit dme1737_exit(void)
{
if (pdev) {
platform_device_unregister(pdev);
platform_driver_unregister(&dme1737_isa_driver);
}
i2c_del_driver(&dme1737_i2c_driver);
}
MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
MODULE_DESCRIPTION("DME1737 sensors");
MODULE_LICENSE("GPL");
module_init(dme1737_init);
module_exit(dme1737_exit);
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