hwmon: add support for THMC50 and ADM1022
This patch adds support for THMC50 and ADM1022 hardware monitoring chips. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Krzysztof Helt
Mark M. Hoffman
Родитель
80ba80a9bf
Коммит
add77c64ca
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@ -0,0 +1,74 @@
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Kernel driver thmc50
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=====================
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Supported chips:
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* Analog Devices ADM1022
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Prefix: 'adm1022'
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Addresses scanned: I2C 0x2c - 0x2e
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Datasheet: http://www.analog.com/en/prod/0,2877,ADM1022,00.html
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* Texas Instruments THMC50
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Prefix: 'thmc50'
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Addresses scanned: I2C 0x2c - 0x2e
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Datasheet: http://focus.ti.com/docs/prod/folders/print/thmc50.html
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Author: Krzysztof Helt <krzysztof.h1@wp.pl>
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This driver was derived from the 2.4 kernel thmc50.c source file.
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Credits:
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thmc50.c (2.4 kernel):
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Frodo Looijaard <frodol@dds.nl>
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Philip Edelbrock <phil@netroedge.com>
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Module Parameters
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-----------------
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* adm1022_temp3: short array
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List of adapter,address pairs to force chips into ADM1022 mode with
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second remote temperature. This does not work for original THMC50 chips.
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Description
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-----------
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The THMC50 implements: an internal temperature sensor, support for an
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external diode-type temperature sensor (compatible w/ the diode sensor inside
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many processors), and a controllable fan/analog_out DAC. For the temperature
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sensors, limits can be set through the appropriate Overtemperature Shutdown
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register and Hysteresis register. Each value can be set and read to half-degree
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accuracy. An alarm is issued (usually to a connected LM78) when the
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temperature gets higher then the Overtemperature Shutdown value; it stays on
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until the temperature falls below the Hysteresis value. All temperatures are in
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degrees Celsius, and are guaranteed within a range of -55 to +125 degrees.
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The THMC50 only updates its values each 1.5 seconds; reading it more often
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will do no harm, but will return 'old' values.
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The THMC50 is usually used in combination with LM78-like chips, to measure
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the temperature of the processor(s).
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The ADM1022 works the same as THMC50 but it is faster (5 Hz instead of
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1 Hz for THMC50). It can be also put in a new mode to handle additional
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remote temperature sensor. The driver use the mode set by BIOS by default.
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In case the BIOS is broken and the mode is set incorrectly, you can force
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the mode with additional remote temperature with adm1022_temp3 parameter.
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A typical symptom of wrong setting is a fan forced to full speed.
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Driver Features
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---------------
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The driver provides up to three temperatures:
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temp1 -- internal
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temp2 -- remote
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temp3 -- 2nd remote only for ADM1022
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pwm1 -- fan speed (0 = stop, 255 = full)
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pwm1_mode -- always 0 (DC mode)
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The value of 0 for pwm1 also forces FAN_OFF signal from the chip,
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so it stops fans even if the value 0 into the ANALOG_OUT register does not.
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The driver was tested on Compaq AP550 with two ADM1022 chips (one works
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in the temp3 mode), five temperature readings and two fans.
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@ -520,6 +520,16 @@ config SENSORS_SMSC47B397
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This driver can also be built as a module. If so, the module
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will be called smsc47b397.
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config SENSORS_THMC50
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tristate "Texas Instruments THMC50 / Analog Devices ADM1022"
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depends on I2C && EXPERIMENTAL
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help
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If you say yes here you get support for Texas Instruments THMC50
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sensor chips and clones: the Analog Devices ADM1022.
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This driver can also be built as a module. If so, the module
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will be called thmc50.
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config SENSORS_VIA686A
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tristate "VIA686A"
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depends on PCI
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@ -56,6 +56,7 @@ obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
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obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
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obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
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obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
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obj-$(CONFIG_SENSORS_THMC50) += thmc50.o
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obj-$(CONFIG_SENSORS_VIA686A) += via686a.o
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obj-$(CONFIG_SENSORS_VT1211) += vt1211.o
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obj-$(CONFIG_SENSORS_VT8231) += vt8231.o
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@ -0,0 +1,440 @@
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/*
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thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
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Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
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Philip Edelbrock <phil@netroedge.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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MODULE_LICENSE("GPL");
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/* Addresses to scan */
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static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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/* Insmod parameters */
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I2C_CLIENT_INSMOD_2(thmc50, adm1022);
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I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
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"to enable 3rd temperature (ADM1022 only)");
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/* Many THMC50 constants specified below */
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/* The THMC50 registers */
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#define THMC50_REG_CONF 0x40
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#define THMC50_REG_COMPANY_ID 0x3E
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#define THMC50_REG_DIE_CODE 0x3F
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#define THMC50_REG_ANALOG_OUT 0x19
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const static u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
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const static u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
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const static u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
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#define THMC50_REG_CONF_nFANOFF 0x20
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/* Each client has this additional data */
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struct thmc50_data {
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struct i2c_client client;
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struct class_device *class_dev;
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struct mutex update_lock;
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enum chips type;
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unsigned long last_updated; /* In jiffies */
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char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
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char valid; /* !=0 if following fields are valid */
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/* Register values */
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s8 temp_input[3];
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s8 temp_max[3];
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s8 temp_min[3];
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u8 analog_out;
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};
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static int thmc50_attach_adapter(struct i2c_adapter *adapter);
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static int thmc50_detach_client(struct i2c_client *client);
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static void thmc50_init_client(struct i2c_client *client);
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static struct thmc50_data *thmc50_update_device(struct device *dev);
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static struct i2c_driver thmc50_driver = {
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.driver = {
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.name = "thmc50",
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},
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.attach_adapter = thmc50_attach_adapter,
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.detach_client = thmc50_detach_client,
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};
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static ssize_t show_analog_out(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->analog_out);
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}
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static ssize_t set_analog_out(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct thmc50_data *data = i2c_get_clientdata(client);
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int tmp = simple_strtoul(buf, NULL, 10);
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int config;
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mutex_lock(&data->update_lock);
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data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
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i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
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data->analog_out);
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config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
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if (data->analog_out == 0)
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config &= ~THMC50_REG_CONF_nFANOFF;
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else
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config |= THMC50_REG_CONF_nFANOFF;
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i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/* There is only one PWM mode = DC */
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static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "0\n");
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}
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/* Temperatures */
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static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
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}
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static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
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}
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static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct i2c_client *client = to_i2c_client(dev);
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struct thmc50_data *data = i2c_get_clientdata(client);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
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i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
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data->temp_min[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
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}
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static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct i2c_client *client = to_i2c_client(dev);
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struct thmc50_data *data = i2c_get_clientdata(client);
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
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i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
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data->temp_max[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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#define temp_reg(offset) \
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static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
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NULL, offset - 1); \
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static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
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show_temp_min, set_temp_min, offset - 1); \
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static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
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show_temp_max, set_temp_max, offset - 1);
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temp_reg(1);
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temp_reg(2);
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temp_reg(3);
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static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
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set_analog_out, 0);
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static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
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static struct attribute *thmc50_attributes[] = {
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&sensor_dev_attr_temp1_max.dev_attr.attr,
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&sensor_dev_attr_temp1_min.dev_attr.attr,
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp2_max.dev_attr.attr,
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&sensor_dev_attr_temp2_min.dev_attr.attr,
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&sensor_dev_attr_temp2_input.dev_attr.attr,
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&sensor_dev_attr_pwm1.dev_attr.attr,
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&sensor_dev_attr_pwm1_mode.dev_attr.attr,
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NULL
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};
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static const struct attribute_group thmc50_group = {
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.attrs = thmc50_attributes,
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};
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/* for ADM1022 3rd temperature mode */
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static struct attribute *adm1022_attributes[] = {
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&sensor_dev_attr_temp3_max.dev_attr.attr,
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&sensor_dev_attr_temp3_min.dev_attr.attr,
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&sensor_dev_attr_temp3_input.dev_attr.attr,
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NULL
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};
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static const struct attribute_group adm1022_group = {
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.attrs = adm1022_attributes,
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};
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static int thmc50_detect(struct i2c_adapter *adapter, int address, int kind)
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{
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unsigned company;
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unsigned revision;
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unsigned config;
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struct i2c_client *client;
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struct thmc50_data *data;
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struct device *dev;
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int err = 0;
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const char *type_name = "";
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
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pr_debug("thmc50: detect failed, "
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"smbus byte data not supported!\n");
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goto exit;
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}
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/* OK. For now, we presume we have a valid client. We now create the
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client structure, even though we cannot fill it completely yet.
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But it allows us to access thmc50 registers. */
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if (!(data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL))) {
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pr_debug("thmc50: detect failed, kzalloc failed!\n");
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err = -ENOMEM;
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goto exit;
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}
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client = &data->client;
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i2c_set_clientdata(client, data);
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client->addr = address;
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client->adapter = adapter;
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client->driver = &thmc50_driver;
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dev = &client->dev;
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pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
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client->addr, i2c_adapter_id(client->adapter));
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/* Now, we do the remaining detection. */
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company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
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revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
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config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
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if (kind == 0)
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kind = thmc50;
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else if (kind < 0) {
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err = -ENODEV;
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if (revision >= 0xc0 && ((config & 0x10) == 0)) {
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if (company == 0x49) {
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kind = thmc50;
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err = 0;
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} else if (company == 0x41) {
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kind = adm1022;
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err = 0;
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}
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}
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}
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if (err == -ENODEV) {
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pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
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goto exit_free;
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}
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pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
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type_name, (revision >> 4) - 0xc, revision & 0xf);
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data->type = kind;
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|
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if (kind == thmc50)
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type_name = "thmc50";
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else if (kind == adm1022) {
|
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int id = i2c_adapter_id(client->adapter);
|
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int i;
|
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|
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type_name = "adm1022";
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data->has_temp3 = (config >> 7) & 1; /* config MSB */
|
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for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
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if (adm1022_temp3[i] == id &&
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adm1022_temp3[i + 1] == address) {
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/* enable 2nd remote temp */
|
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data->has_temp3 = 1;
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break;
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||||
}
|
||||
}
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||||
|
||||
/* Fill in the remaining client fields & put it into the global list */
|
||||
strlcpy(client->name, type_name, I2C_NAME_SIZE);
|
||||
mutex_init(&data->update_lock);
|
||||
|
||||
/* Tell the I2C layer a new client has arrived */
|
||||
if ((err = i2c_attach_client(client)))
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||||
goto exit_free;
|
||||
|
||||
thmc50_init_client(client);
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||||
|
||||
/* Register sysfs hooks */
|
||||
if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
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||||
goto exit_detach;
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||||
|
||||
/* Register ADM1022 sysfs hooks */
|
||||
if (data->type == adm1022)
|
||||
if ((err = sysfs_create_group(&client->dev.kobj,
|
||||
&adm1022_group)))
|
||||
goto exit_remove_sysfs_thmc50;
|
||||
|
||||
/* Register a new directory entry with module sensors */
|
||||
data->class_dev = hwmon_device_register(&client->dev);
|
||||
if (IS_ERR(data->class_dev)) {
|
||||
err = PTR_ERR(data->class_dev);
|
||||
goto exit_remove_sysfs;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
exit_remove_sysfs:
|
||||
if (data->type == adm1022)
|
||||
sysfs_remove_group(&client->dev.kobj, &adm1022_group);
|
||||
exit_remove_sysfs_thmc50:
|
||||
sysfs_remove_group(&client->dev.kobj, &thmc50_group);
|
||||
exit_detach:
|
||||
i2c_detach_client(client);
|
||||
exit_free:
|
||||
kfree(data);
|
||||
exit:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int thmc50_attach_adapter(struct i2c_adapter *adapter)
|
||||
{
|
||||
if (!(adapter->class & I2C_CLASS_HWMON))
|
||||
return 0;
|
||||
return i2c_probe(adapter, &addr_data, thmc50_detect);
|
||||
}
|
||||
|
||||
static int thmc50_detach_client(struct i2c_client *client)
|
||||
{
|
||||
struct thmc50_data *data = i2c_get_clientdata(client);
|
||||
int err;
|
||||
|
||||
hwmon_device_unregister(data->class_dev);
|
||||
sysfs_remove_group(&client->dev.kobj, &thmc50_group);
|
||||
if (data->type == adm1022)
|
||||
sysfs_remove_group(&client->dev.kobj, &adm1022_group);
|
||||
|
||||
if ((err = i2c_detach_client(client)))
|
||||
return err;
|
||||
|
||||
kfree(data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void thmc50_init_client(struct i2c_client *client)
|
||||
{
|
||||
struct thmc50_data *data = i2c_get_clientdata(client);
|
||||
int config;
|
||||
|
||||
data->analog_out = i2c_smbus_read_byte_data(client,
|
||||
THMC50_REG_ANALOG_OUT);
|
||||
/* set up to at least 1 */
|
||||
if (data->analog_out == 0) {
|
||||
data->analog_out = 1;
|
||||
i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
|
||||
data->analog_out);
|
||||
}
|
||||
config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
|
||||
config |= 0x1; /* start the chip if it is in standby mode */
|
||||
if (data->has_temp3)
|
||||
config |= 0x80; /* enable 2nd remote temp */
|
||||
i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
|
||||
}
|
||||
|
||||
static struct thmc50_data *thmc50_update_device(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct thmc50_data *data = i2c_get_clientdata(client);
|
||||
int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
|
||||
if (time_after(jiffies, data->last_updated + timeout)
|
||||
|| !data->valid) {
|
||||
|
||||
int temps = data->has_temp3 ? 3 : 2;
|
||||
int i;
|
||||
for (i = 0; i < temps; i++) {
|
||||
data->temp_input[i] = i2c_smbus_read_byte_data(client,
|
||||
THMC50_REG_TEMP[i]);
|
||||
data->temp_max[i] = i2c_smbus_read_byte_data(client,
|
||||
THMC50_REG_TEMP_MAX[i]);
|
||||
data->temp_min[i] = i2c_smbus_read_byte_data(client,
|
||||
THMC50_REG_TEMP_MIN[i]);
|
||||
}
|
||||
data->analog_out =
|
||||
i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
|
||||
data->last_updated = jiffies;
|
||||
data->valid = 1;
|
||||
}
|
||||
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
static int __init sm_thmc50_init(void)
|
||||
{
|
||||
return i2c_add_driver(&thmc50_driver);
|
||||
}
|
||||
|
||||
static void __exit sm_thmc50_exit(void)
|
||||
{
|
||||
i2c_del_driver(&thmc50_driver);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
|
||||
MODULE_DESCRIPTION("THMC50 driver");
|
||||
|
||||
module_init(sm_thmc50_init);
|
||||
module_exit(sm_thmc50_exit);
|
||||
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