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it87: Add support for the IT8718F
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it87: Add support for the IT8718F

The IT8718F is a Super-I/O chip with integrated hardware monitoring
functions. It is very similar to the IT8716F, so adding support to the
it87 driver was pretty straightforward. The most significant difference
is that the IT8718F has up to 8 VID pins, instead of 6 for the older
chips.

For the IT8718F, the VID value can only be read from Super-I/O space.

Userspace support is already in lm_sensors SVN (to be soon released
as 2.10.1.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Jean Delvare authored and gregkh committed Sep 28, 2006
1 parent 8ab4ec3 commit 87673dd
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33 changes: 23 additions & 10 deletions Documentation/hwmon/it87
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,12 @@ Supported chips:
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/product_info/file/pc/IT8716F_V0.3.ZIP
* IT8718F
Prefix: 'it8718'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/product_info/file/pc/IT8718F_V0.2.zip
http://www.ite.com.tw/product_info/file/pc/IT8718F_V0%203_(for%20C%20version).zip
* SiS950 [clone of IT8705F]
Prefix: 'it87'
Addresses scanned: from Super I/O config space (8 I/O ports)
Expand Down Expand Up @@ -48,8 +54,8 @@ Module Parameters
Description
-----------

This driver implements support for the IT8705F, IT8712F, IT8716F and
SiS950 chips.
This driver implements support for the IT8705F, IT8712F, IT8716F,
IT8718F and SiS950 chips.

These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
Expand All @@ -62,14 +68,21 @@ the IT8716F and late IT8712F have 6. They are shared with other functions
though, so the functionality may not be available on a given system.
The driver dumbly assume it is there.

The IT8716F and later IT8712F revisions have support for 2 additional
fans. They are not yet supported by the driver.
The IT8718F also features VID inputs (up to 8 pins) but the value is
stored in the Super-I/O configuration space. Due to technical limitations,
this value can currently only be read once at initialization time, so
the driver won't notice and report changes in the VID value. The two
upper VID bits share their pins with voltage inputs (in5 and in6) so you
can't have both on a given board.

The IT8716F, IT8718F and later IT8712F revisions have support for
2 additional fans. They are not yet supported by the driver.

The IT8716F and late IT8712F and IT8705F also have optional 16-bit
tachometer counters for fans 1 to 3. This is better (no more fan
The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional
16-bit tachometer counters for fans 1 to 3. This is better (no more fan
clock divider mess) but not compatible with the older chips and
revisions. For now, the driver only uses the 16-bit mode on the
IT8716F.
IT8716F and IT8718F.

Temperatures are measured in degrees Celsius. An alarm is triggered once
when the Overtemperature Shutdown limit is crossed.
Expand All @@ -89,9 +102,9 @@ zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 4.08 volts, with a resolution of
0.016 volt. The battery voltage in8 does not have limit registers.

The VID lines (IT8712F/IT8716F) encode the core voltage value: the voltage
level your processor should work with. This is hardcoded by the mainboard
and/or processor itself. It is a value in volts.
The VID lines (IT8712F/IT8716F/IT8718F) encode the core voltage value:
the voltage level your processor should work with. This is hardcoded by
the mainboard and/or processor itself. It is a value in volts.

If an alarm triggers, it will remain triggered until the hardware register
is read at least once. This means that the cause for the alarm may already
Expand Down
4 changes: 2 additions & 2 deletions drivers/hwmon/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -186,8 +186,8 @@ config SENSORS_IT87
select I2C_ISA
select HWMON_VID
help
If you say yes here you get support for ITE IT8705F, IT8712F and
IT8716F sensor chips, and the SiS960 clone.
If you say yes here you get support for ITE IT8705F, IT8712F,
IT8716F and IT8718F sensor chips, and the SiS960 clone.

This driver can also be built as a module. If so, the module
will be called it87.
Expand Down
61 changes: 49 additions & 12 deletions drivers/hwmon/it87.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
Supports: IT8705F Super I/O chip w/LPC interface
IT8712F Super I/O chip w/LPC interface & SMBus
IT8716F Super I/O chip w/LPC interface
IT8718F Super I/O chip w/LPC interface
Sis950 A clone of the IT8705F
Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com>
Expand Down Expand Up @@ -51,12 +52,13 @@ static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
static unsigned short isa_address;

/* Insmod parameters */
I2C_CLIENT_INSMOD_3(it87, it8712, it8716);
I2C_CLIENT_INSMOD_4(it87, it8712, it8716, it8718);

#define REG 0x2e /* The register to read/write */
#define DEV 0x07 /* Register: Logical device select */
#define VAL 0x2f /* The value to read/write */
#define PME 0x04 /* The device with the fan registers in it */
#define GPIO 0x07 /* The device with the IT8718F VID value in it */
#define DEVID 0x20 /* Register: Device ID */
#define DEVREV 0x22 /* Register: Device Revision */

Expand All @@ -78,10 +80,10 @@ static int superio_inw(int reg)
}

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

static inline void
Expand All @@ -100,21 +102,27 @@ superio_exit(void)
outb(0x02, VAL);
}

/* Logical device 4 registers */
#define IT8712F_DEVID 0x8712
#define IT8705F_DEVID 0x8705
#define IT8716F_DEVID 0x8716
#define IT8718F_DEVID 0x8718
#define IT87_ACT_REG 0x30
#define IT87_BASE_REG 0x60

/* Logical device 7 registers (IT8712F and later) */
#define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
#define IT87_SIO_VID_REG 0xfc /* VID value */

/* Update battery voltage after every reading if true */
static int update_vbat;

/* Not all BIOSes properly configure the PWM registers */
static int fix_pwm_polarity;

/* Chip Type */

/* Values read from Super-I/O config space */
static u16 chip_type;
static u8 vid_value;

/* Many IT87 constants specified below */

Expand All @@ -133,6 +141,8 @@ static u16 chip_type;
#define IT87_REG_ALARM2 0x02
#define IT87_REG_ALARM3 0x03

/* The IT8718F has the VID value in a different register, in Super-I/O
configuration space. */
#define IT87_REG_VID 0x0a
/* Warning: register 0x0b is used for something completely different in
new chips/revisions. I suspect only 16-bit tachometer mode will work
Expand Down Expand Up @@ -793,10 +803,11 @@ static int __init it87_find(unsigned short *address)
chip_type = superio_inw(DEVID);
if (chip_type != IT8712F_DEVID
&& chip_type != IT8716F_DEVID
&& chip_type != IT8718F_DEVID
&& chip_type != IT8705F_DEVID)
goto exit;

superio_select();
superio_select(PME);
if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
pr_info("it87: Device not activated, skipping\n");
goto exit;
Expand All @@ -812,6 +823,21 @@ static int __init it87_find(unsigned short *address)
pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
chip_type, *address, superio_inb(DEVREV) & 0x0f);

/* Read GPIO config and VID value from LDN 7 (GPIO) */
if (chip_type != IT8705F_DEVID) {
int reg;

superio_select(GPIO);
if (chip_type == it8718)
vid_value = superio_inb(IT87_SIO_VID_REG);

reg = superio_inb(IT87_SIO_PINX2_REG);
if (reg & (1 << 0))
pr_info("it87: in3 is VCC (+5V)\n");
if (reg & (1 << 1))
pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
}

exit:
superio_exit();
return err;
Expand Down Expand Up @@ -880,6 +906,9 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
case IT8716F_DEVID:
kind = it8716;
break;
case IT8718F_DEVID:
kind = it8718;
break;
}
}
}
Expand All @@ -900,6 +929,8 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
name = "it8712";
} else if (kind == it8716) {
name = "it8716";
} else if (kind == it8718) {
name = "it8718";
}

/* Fill in the remaining client fields and put it into the global list */
Expand Down Expand Up @@ -969,7 +1000,8 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr);

/* Do not create fan files for disabled fans */
if (data->type == it8716) { /* 16-bit tachometers */
if (data->type == it8716 || data->type == it8718) {
/* 16-bit tachometers */
if (data->has_fan & (1 << 0)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input16.dev_attr);
Expand All @@ -989,6 +1021,7 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
&sensor_dev_attr_fan3_min16.dev_attr);
}
} else {
/* 8-bit tachometers with clock divider */
if (data->has_fan & (1 << 0)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input.dev_attr);
Expand Down Expand Up @@ -1025,8 +1058,11 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
device_create_file(&new_client->dev, &sensor_dev_attr_pwm3.dev_attr);
}

if (data->type == it8712 || data->type == it8716) {
if (data->type == it8712 || data->type == it8716
|| data->type == it8718) {
data->vrm = vid_which_vrm();
/* VID reading from Super-I/O config space if available */
data->vid = vid_value;
device_create_file_vrm(new_client);
device_create_file_vid(new_client);
}
Expand Down Expand Up @@ -1192,7 +1228,7 @@ static void it87_init_client(struct i2c_client *client, struct it87_data *data)
data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;

/* Set tachometers to 16-bit mode if needed */
if (data->type == it8716) {
if (data->type == it8716 || data->type == it8718) {
tmp = it87_read_value(client, IT87_REG_FAN_16BIT);
if (~tmp & 0x07 & data->has_fan) {
dev_dbg(&client->dev,
Expand Down Expand Up @@ -1265,7 +1301,7 @@ static struct it87_data *it87_update_device(struct device *dev)
data->fan[i] = it87_read_value(client,
IT87_REG_FAN(i));
/* Add high byte if in 16-bit mode */
if (data->type == it8716) {
if (data->type == it8716 || data->type == it8718) {
data->fan[i] |= it87_read_value(client,
IT87_REG_FANX(i)) << 8;
data->fan_min[i] |= it87_read_value(client,
Expand All @@ -1282,7 +1318,8 @@ static struct it87_data *it87_update_device(struct device *dev)
}

/* Newer chips don't have clock dividers */
if ((data->has_fan & 0x07) && data->type != it8716) {
if ((data->has_fan & 0x07) && data->type != it8716
&& data->type != it8718) {
i = it87_read_value(client, IT87_REG_FAN_DIV);
data->fan_div[0] = i & 0x07;
data->fan_div[1] = (i >> 3) & 0x07;
Expand Down Expand Up @@ -1340,7 +1377,7 @@ static void __exit sm_it87_exit(void)


MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>");
MODULE_DESCRIPTION("IT8705F/8712F/8716F, SiS950 driver");
MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F, SiS950 driver");
module_param(update_vbat, bool, 0);
MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
module_param(fix_pwm_polarity, bool, 0);
Expand Down

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