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![Guenter Roeck](/assets/img/avatar_default.png)
Writes into voltage limit attributes can overflow due to an unbound multiplication. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
985 lines
28 KiB
C
985 lines
28 KiB
C
/*
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* lm87.c
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*
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* Copyright (C) 2000 Frodo Looijaard <frodol@dds.nl>
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* Philip Edelbrock <phil@netroedge.com>
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* Stephen Rousset <stephen.rousset@rocketlogix.com>
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* Dan Eaton <dan.eaton@rocketlogix.com>
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* Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de>
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*
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* Original port to Linux 2.6 by Jeff Oliver.
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*
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* The LM87 is a sensor chip made by National Semiconductor. It monitors up
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* to 8 voltages (including its own power source), up to three temperatures
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* (its own plus up to two external ones) and up to two fans. The default
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* configuration is 6 voltages, two temperatures and two fans (see below).
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* Voltages are scaled internally with ratios such that the nominal value of
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* each voltage correspond to a register value of 192 (which means a
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* resolution of about 0.5% of the nominal value). Temperature values are
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* reported with a 1 deg resolution and a 3-4 deg accuracy. Complete
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* datasheet can be obtained from National's website at:
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* http://www.national.com/pf/LM/LM87.html
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*
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* Some functions share pins, so not all functions are available at the same
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* time. Which are depends on the hardware setup. This driver normally
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* assumes that firmware configured the chip correctly. Where this is not
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* the case, platform code must set the I2C client's platform_data to point
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* to a u8 value to be written to the channel register.
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* For reference, here is the list of exclusive functions:
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* - in0+in5 (default) or temp3
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* - fan1 (default) or in6
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* - fan2 (default) or in7
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* - VID lines (default) or IRQ lines (not handled by this driver)
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*
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* The LM87 additionally features an analog output, supposedly usable to
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* control the speed of a fan. All new chips use pulse width modulation
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* instead. The LM87 is the only hardware monitoring chipset I know of
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* which uses amplitude modulation. Be careful when using this feature.
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*
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* This driver also supports the ADM1024, a sensor chip made by Analog
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* Devices. That chip is fully compatible with the LM87. Complete
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* datasheet can be obtained from Analog's website at:
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* http://www.analog.com/en/prod/0,2877,ADM1024,00.html
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*
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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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*
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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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*
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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/jiffies.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/hwmon-vid.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/*
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* Addresses to scan
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* LM87 has three possible addresses: 0x2c, 0x2d and 0x2e.
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*/
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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enum chips { lm87, adm1024 };
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/*
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* The LM87 registers
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*/
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/* nr in 0..5 */
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#define LM87_REG_IN(nr) (0x20 + (nr))
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#define LM87_REG_IN_MAX(nr) (0x2B + (nr) * 2)
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#define LM87_REG_IN_MIN(nr) (0x2C + (nr) * 2)
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/* nr in 0..1 */
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#define LM87_REG_AIN(nr) (0x28 + (nr))
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#define LM87_REG_AIN_MIN(nr) (0x1A + (nr))
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#define LM87_REG_AIN_MAX(nr) (0x3B + (nr))
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static u8 LM87_REG_TEMP[3] = { 0x27, 0x26, 0x20 };
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static u8 LM87_REG_TEMP_HIGH[3] = { 0x39, 0x37, 0x2B };
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static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
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#define LM87_REG_TEMP_HW_INT_LOCK 0x13
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#define LM87_REG_TEMP_HW_EXT_LOCK 0x14
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#define LM87_REG_TEMP_HW_INT 0x17
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#define LM87_REG_TEMP_HW_EXT 0x18
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/* nr in 0..1 */
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#define LM87_REG_FAN(nr) (0x28 + (nr))
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#define LM87_REG_FAN_MIN(nr) (0x3B + (nr))
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#define LM87_REG_AOUT 0x19
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#define LM87_REG_CONFIG 0x40
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#define LM87_REG_CHANNEL_MODE 0x16
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#define LM87_REG_VID_FAN_DIV 0x47
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#define LM87_REG_VID4 0x49
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#define LM87_REG_ALARMS1 0x41
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#define LM87_REG_ALARMS2 0x42
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#define LM87_REG_COMPANY_ID 0x3E
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#define LM87_REG_REVISION 0x3F
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/*
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* Conversions and various macros
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* The LM87 uses signed 8-bit values for temperatures.
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*/
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#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
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#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
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(val) >= (scale) * 255 / 192 ? 255 : \
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((val) * 192 + (scale) / 2) / (scale))
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#define TEMP_FROM_REG(reg) ((reg) * 1000)
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#define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \
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(val) >= 126500 ? 127 : \
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(((val) < 0 ? (val) - 500 : \
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(val) + 500) / 1000))
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#define FAN_FROM_REG(reg, div) ((reg) == 255 || (reg) == 0 ? 0 : \
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(1350000 + (reg)*(div) / 2) / ((reg) * (div)))
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#define FAN_TO_REG(val, div) ((val) * (div) * 255 <= 1350000 ? 255 : \
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(1350000 + (val)*(div) / 2) / ((val) * (div)))
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#define FAN_DIV_FROM_REG(reg) (1 << (reg))
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/* analog out is 9.80mV/LSB */
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#define AOUT_FROM_REG(reg) (((reg) * 98 + 5) / 10)
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#define AOUT_TO_REG(val) ((val) <= 0 ? 0 : \
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(val) >= 2500 ? 255 : \
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((val) * 10 + 49) / 98)
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/* nr in 0..1 */
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#define CHAN_NO_FAN(nr) (1 << (nr))
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#define CHAN_TEMP3 (1 << 2)
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#define CHAN_VCC_5V (1 << 3)
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#define CHAN_NO_VID (1 << 7)
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/*
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* Client data (each client gets its own)
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*/
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struct lm87_data {
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struct mutex update_lock;
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char valid; /* zero until following fields are valid */
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unsigned long last_updated; /* In jiffies */
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u8 channel; /* register value */
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u8 config; /* original register value */
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u8 in[8]; /* register value */
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u8 in_max[8]; /* register value */
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u8 in_min[8]; /* register value */
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u16 in_scale[8];
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s8 temp[3]; /* register value */
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s8 temp_high[3]; /* register value */
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s8 temp_low[3]; /* register value */
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s8 temp_crit_int; /* min of two register values */
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s8 temp_crit_ext; /* min of two register values */
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u8 fan[2]; /* register value */
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u8 fan_min[2]; /* register value */
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u8 fan_div[2]; /* register value, shifted right */
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u8 aout; /* register value */
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u16 alarms; /* register values, combined */
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u8 vid; /* register values, combined */
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u8 vrm;
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const struct attribute_group *attr_groups[6];
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};
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static inline int lm87_read_value(struct i2c_client *client, u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
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{
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static struct lm87_data *lm87_update_device(struct device *dev)
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{
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struct i2c_client *client = dev_get_drvdata(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
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int i, j;
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dev_dbg(&client->dev, "Updating data.\n");
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i = (data->channel & CHAN_TEMP3) ? 1 : 0;
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j = (data->channel & CHAN_TEMP3) ? 5 : 6;
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for (; i < j; i++) {
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data->in[i] = lm87_read_value(client,
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LM87_REG_IN(i));
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data->in_min[i] = lm87_read_value(client,
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LM87_REG_IN_MIN(i));
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data->in_max[i] = lm87_read_value(client,
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LM87_REG_IN_MAX(i));
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}
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for (i = 0; i < 2; i++) {
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if (data->channel & CHAN_NO_FAN(i)) {
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data->in[6+i] = lm87_read_value(client,
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LM87_REG_AIN(i));
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data->in_max[6+i] = lm87_read_value(client,
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LM87_REG_AIN_MAX(i));
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data->in_min[6+i] = lm87_read_value(client,
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LM87_REG_AIN_MIN(i));
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} else {
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data->fan[i] = lm87_read_value(client,
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LM87_REG_FAN(i));
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data->fan_min[i] = lm87_read_value(client,
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LM87_REG_FAN_MIN(i));
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}
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}
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j = (data->channel & CHAN_TEMP3) ? 3 : 2;
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for (i = 0 ; i < j; i++) {
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data->temp[i] = lm87_read_value(client,
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LM87_REG_TEMP[i]);
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data->temp_high[i] = lm87_read_value(client,
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LM87_REG_TEMP_HIGH[i]);
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data->temp_low[i] = lm87_read_value(client,
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LM87_REG_TEMP_LOW[i]);
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}
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i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
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j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
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data->temp_crit_int = min(i, j);
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i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
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j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
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data->temp_crit_ext = min(i, j);
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i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
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data->fan_div[0] = (i >> 4) & 0x03;
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data->fan_div[1] = (i >> 6) & 0x03;
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data->vid = (i & 0x0F)
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| (lm87_read_value(client, LM87_REG_VID4) & 0x01)
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<< 4;
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data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
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| (lm87_read_value(client, LM87_REG_ALARMS2)
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<< 8);
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data->aout = lm87_read_value(client, LM87_REG_AOUT);
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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/*
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* Sysfs stuff
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*/
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static ssize_t show_in_input(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lm87_data *data = lm87_update_device(dev);
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int nr = to_sensor_dev_attr(attr)->index;
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return sprintf(buf, "%u\n", IN_FROM_REG(data->in[nr],
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data->in_scale[nr]));
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}
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static ssize_t show_in_min(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm87_data *data = lm87_update_device(dev);
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int nr = to_sensor_dev_attr(attr)->index;
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return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[nr],
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data->in_scale[nr]));
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}
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static ssize_t show_in_max(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm87_data *data = lm87_update_device(dev);
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int nr = to_sensor_dev_attr(attr)->index;
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return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[nr],
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data->in_scale[nr]));
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}
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static ssize_t set_in_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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struct i2c_client *client = dev_get_drvdata(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->in_min[nr] = IN_TO_REG(val, data->in_scale[nr]);
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lm87_write_value(client, nr < 6 ? LM87_REG_IN_MIN(nr) :
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LM87_REG_AIN_MIN(nr - 6), data->in_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 set_in_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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struct i2c_client *client = dev_get_drvdata(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->in_max[nr] = IN_TO_REG(val, data->in_scale[nr]);
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lm87_write_value(client, nr < 6 ? LM87_REG_IN_MAX(nr) :
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LM87_REG_AIN_MAX(nr - 6), data->in_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 set_in(offset) \
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static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
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show_in_input, NULL, offset); \
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static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
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show_in_min, set_in_min, offset); \
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static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
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show_in_max, set_in_max, offset)
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set_in(0);
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set_in(1);
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set_in(2);
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set_in(3);
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set_in(4);
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set_in(5);
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set_in(6);
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set_in(7);
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static ssize_t show_temp_input(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm87_data *data = lm87_update_device(dev);
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int nr = to_sensor_dev_attr(attr)->index;
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
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}
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static ssize_t show_temp_low(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm87_data *data = lm87_update_device(dev);
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int nr = to_sensor_dev_attr(attr)->index;
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return sprintf(buf, "%d\n",
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TEMP_FROM_REG(data->temp_low[nr]));
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}
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static ssize_t show_temp_high(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm87_data *data = lm87_update_device(dev);
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int nr = to_sensor_dev_attr(attr)->index;
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return sprintf(buf, "%d\n",
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TEMP_FROM_REG(data->temp_high[nr]));
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}
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static ssize_t set_temp_low(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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struct i2c_client *client = dev_get_drvdata(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_low[nr] = TEMP_TO_REG(val);
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lm87_write_value(client, LM87_REG_TEMP_LOW[nr], data->temp_low[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 set_temp_high(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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struct i2c_client *client = dev_get_drvdata(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_high[nr] = TEMP_TO_REG(val);
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lm87_write_value(client, LM87_REG_TEMP_HIGH[nr], data->temp_high[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 set_temp(offset) \
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static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
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show_temp_input, NULL, offset - 1); \
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static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
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show_temp_high, set_temp_high, offset - 1); \
|
|
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_temp_low, set_temp_low, offset - 1)
|
|
set_temp(1);
|
|
set_temp(2);
|
|
set_temp(3);
|
|
|
|
static ssize_t show_temp_crit_int(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
|
|
}
|
|
|
|
static ssize_t show_temp_crit_ext(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
|
|
}
|
|
|
|
static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
|
|
static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
|
|
static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
|
|
|
|
static ssize_t show_fan_input(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
int nr = to_sensor_dev_attr(attr)->index;
|
|
|
|
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
|
|
FAN_DIV_FROM_REG(data->fan_div[nr])));
|
|
}
|
|
|
|
static ssize_t show_fan_min(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
int nr = to_sensor_dev_attr(attr)->index;
|
|
|
|
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
|
|
FAN_DIV_FROM_REG(data->fan_div[nr])));
|
|
}
|
|
|
|
static ssize_t show_fan_div(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
int nr = to_sensor_dev_attr(attr)->index;
|
|
|
|
return sprintf(buf, "%d\n",
|
|
FAN_DIV_FROM_REG(data->fan_div[nr]));
|
|
}
|
|
|
|
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = dev_get_drvdata(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
int nr = to_sensor_dev_attr(attr)->index;
|
|
long val;
|
|
int err;
|
|
|
|
err = kstrtol(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->fan_min[nr] = FAN_TO_REG(val,
|
|
FAN_DIV_FROM_REG(data->fan_div[nr]));
|
|
lm87_write_value(client, LM87_REG_FAN_MIN(nr), data->fan_min[nr]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* Note: we save and restore the fan minimum here, because its value is
|
|
* determined in part by the fan clock divider. This follows the principle
|
|
* of least surprise; the user doesn't expect the fan minimum to change just
|
|
* because the divider changed.
|
|
*/
|
|
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = dev_get_drvdata(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
int nr = to_sensor_dev_attr(attr)->index;
|
|
long val;
|
|
int err;
|
|
unsigned long min;
|
|
u8 reg;
|
|
|
|
err = kstrtol(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
min = FAN_FROM_REG(data->fan_min[nr],
|
|
FAN_DIV_FROM_REG(data->fan_div[nr]));
|
|
|
|
switch (val) {
|
|
case 1:
|
|
data->fan_div[nr] = 0;
|
|
break;
|
|
case 2:
|
|
data->fan_div[nr] = 1;
|
|
break;
|
|
case 4:
|
|
data->fan_div[nr] = 2;
|
|
break;
|
|
case 8:
|
|
data->fan_div[nr] = 3;
|
|
break;
|
|
default:
|
|
mutex_unlock(&data->update_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
reg = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
|
|
switch (nr) {
|
|
case 0:
|
|
reg = (reg & 0xCF) | (data->fan_div[0] << 4);
|
|
break;
|
|
case 1:
|
|
reg = (reg & 0x3F) | (data->fan_div[1] << 6);
|
|
break;
|
|
}
|
|
lm87_write_value(client, LM87_REG_VID_FAN_DIV, reg);
|
|
|
|
data->fan_min[nr] = FAN_TO_REG(min, val);
|
|
lm87_write_value(client, LM87_REG_FAN_MIN(nr),
|
|
data->fan_min[nr]);
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
#define set_fan(offset) \
|
|
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
|
|
show_fan_input, NULL, offset - 1); \
|
|
static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_fan_min, set_fan_min, offset - 1); \
|
|
static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
|
|
show_fan_div, set_fan_div, offset - 1)
|
|
set_fan(1);
|
|
set_fan(2);
|
|
|
|
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->alarms);
|
|
}
|
|
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
|
|
|
|
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
|
|
}
|
|
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
|
|
|
|
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lm87_data *data = dev_get_drvdata(dev);
|
|
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 lm87_data *data = dev_get_drvdata(dev);
|
|
unsigned long val;
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
if (val > 255)
|
|
return -EINVAL;
|
|
|
|
data->vrm = val;
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
|
|
|
|
static ssize_t show_aout(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
|
|
}
|
|
static ssize_t set_aout(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = dev_get_drvdata(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
long val;
|
|
int err;
|
|
|
|
err = kstrtol(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->aout = AOUT_TO_REG(val);
|
|
lm87_write_value(client, LM87_REG_AOUT, data->aout);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
|
|
|
|
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lm87_data *data = lm87_update_device(dev);
|
|
int bitnr = to_sensor_dev_attr(attr)->index;
|
|
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
|
|
}
|
|
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
|
|
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
|
|
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 14);
|
|
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
|
|
|
|
/*
|
|
* Real code
|
|
*/
|
|
|
|
static struct attribute *lm87_attributes[] = {
|
|
&sensor_dev_attr_in1_input.dev_attr.attr,
|
|
&sensor_dev_attr_in1_min.dev_attr.attr,
|
|
&sensor_dev_attr_in1_max.dev_attr.attr,
|
|
&sensor_dev_attr_in1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in2_input.dev_attr.attr,
|
|
&sensor_dev_attr_in2_min.dev_attr.attr,
|
|
&sensor_dev_attr_in2_max.dev_attr.attr,
|
|
&sensor_dev_attr_in2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in3_input.dev_attr.attr,
|
|
&sensor_dev_attr_in3_min.dev_attr.attr,
|
|
&sensor_dev_attr_in3_max.dev_attr.attr,
|
|
&sensor_dev_attr_in3_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in4_min.dev_attr.attr,
|
|
&sensor_dev_attr_in4_max.dev_attr.attr,
|
|
&sensor_dev_attr_in4_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
|
&dev_attr_temp1_crit.attr,
|
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
|
&dev_attr_temp2_crit.attr,
|
|
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_aout_output.attr,
|
|
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group = {
|
|
.attrs = lm87_attributes,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_in6[] = {
|
|
&sensor_dev_attr_in6_input.dev_attr.attr,
|
|
&sensor_dev_attr_in6_min.dev_attr.attr,
|
|
&sensor_dev_attr_in6_max.dev_attr.attr,
|
|
&sensor_dev_attr_in6_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_in6 = {
|
|
.attrs = lm87_attributes_in6,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_fan1[] = {
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_fan1 = {
|
|
.attrs = lm87_attributes_fan1,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_in7[] = {
|
|
&sensor_dev_attr_in7_input.dev_attr.attr,
|
|
&sensor_dev_attr_in7_min.dev_attr.attr,
|
|
&sensor_dev_attr_in7_max.dev_attr.attr,
|
|
&sensor_dev_attr_in7_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_in7 = {
|
|
.attrs = lm87_attributes_in7,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_fan2[] = {
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_fan2 = {
|
|
.attrs = lm87_attributes_fan2,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_temp3[] = {
|
|
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_min.dev_attr.attr,
|
|
&dev_attr_temp3_crit.attr,
|
|
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_fault.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_temp3 = {
|
|
.attrs = lm87_attributes_temp3,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_in0_5[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_min.dev_attr.attr,
|
|
&sensor_dev_attr_in0_max.dev_attr.attr,
|
|
&sensor_dev_attr_in0_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_min.dev_attr.attr,
|
|
&sensor_dev_attr_in5_max.dev_attr.attr,
|
|
&sensor_dev_attr_in5_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_in0_5 = {
|
|
.attrs = lm87_attributes_in0_5,
|
|
};
|
|
|
|
static struct attribute *lm87_attributes_vid[] = {
|
|
&dev_attr_cpu0_vid.attr,
|
|
&dev_attr_vrm.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_vid = {
|
|
.attrs = lm87_attributes_vid,
|
|
};
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
const char *name;
|
|
u8 cid, rev;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
if (lm87_read_value(client, LM87_REG_CONFIG) & 0x80)
|
|
return -ENODEV;
|
|
|
|
/* Now, we do the remaining detection. */
|
|
cid = lm87_read_value(client, LM87_REG_COMPANY_ID);
|
|
rev = lm87_read_value(client, LM87_REG_REVISION);
|
|
|
|
if (cid == 0x02 /* National Semiconductor */
|
|
&& (rev >= 0x01 && rev <= 0x08))
|
|
name = "lm87";
|
|
else if (cid == 0x41 /* Analog Devices */
|
|
&& (rev & 0xf0) == 0x10)
|
|
name = "adm1024";
|
|
else {
|
|
dev_dbg(&adapter->dev, "LM87 detection failed at 0x%02x\n",
|
|
client->addr);
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lm87_restore_config(void *arg)
|
|
{
|
|
struct i2c_client *client = arg;
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
|
|
lm87_write_value(client, LM87_REG_CONFIG, data->config);
|
|
}
|
|
|
|
static int lm87_init_client(struct i2c_client *client)
|
|
{
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
int rc;
|
|
|
|
if (dev_get_platdata(&client->dev)) {
|
|
data->channel = *(u8 *)dev_get_platdata(&client->dev);
|
|
lm87_write_value(client,
|
|
LM87_REG_CHANNEL_MODE, data->channel);
|
|
} else {
|
|
data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
|
|
}
|
|
data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
|
|
|
|
rc = devm_add_action(&client->dev, lm87_restore_config, client);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (!(data->config & 0x01)) {
|
|
int i;
|
|
|
|
/* Limits are left uninitialized after power-up */
|
|
for (i = 1; i < 6; i++) {
|
|
lm87_write_value(client, LM87_REG_IN_MIN(i), 0x00);
|
|
lm87_write_value(client, LM87_REG_IN_MAX(i), 0xFF);
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
lm87_write_value(client, LM87_REG_TEMP_HIGH[i], 0x7F);
|
|
lm87_write_value(client, LM87_REG_TEMP_LOW[i], 0x00);
|
|
lm87_write_value(client, LM87_REG_AIN_MIN(i), 0x00);
|
|
lm87_write_value(client, LM87_REG_AIN_MAX(i), 0xFF);
|
|
}
|
|
if (data->channel & CHAN_TEMP3) {
|
|
lm87_write_value(client, LM87_REG_TEMP_HIGH[2], 0x7F);
|
|
lm87_write_value(client, LM87_REG_TEMP_LOW[2], 0x00);
|
|
} else {
|
|
lm87_write_value(client, LM87_REG_IN_MIN(0), 0x00);
|
|
lm87_write_value(client, LM87_REG_IN_MAX(0), 0xFF);
|
|
}
|
|
}
|
|
|
|
/* Make sure Start is set and INT#_Clear is clear */
|
|
if ((data->config & 0x09) != 0x01)
|
|
lm87_write_value(client, LM87_REG_CONFIG,
|
|
(data->config & 0x77) | 0x01);
|
|
return 0;
|
|
}
|
|
|
|
static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
|
{
|
|
struct lm87_data *data;
|
|
struct device *hwmon_dev;
|
|
int err;
|
|
unsigned int group_tail = 0;
|
|
|
|
data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Initialize the LM87 chip */
|
|
err = lm87_init_client(client);
|
|
if (err)
|
|
return err;
|
|
|
|
data->in_scale[0] = 2500;
|
|
data->in_scale[1] = 2700;
|
|
data->in_scale[2] = (data->channel & CHAN_VCC_5V) ? 5000 : 3300;
|
|
data->in_scale[3] = 5000;
|
|
data->in_scale[4] = 12000;
|
|
data->in_scale[5] = 2700;
|
|
data->in_scale[6] = 1875;
|
|
data->in_scale[7] = 1875;
|
|
|
|
/*
|
|
* Construct the list of attributes, the list depends on the
|
|
* configuration of the chip
|
|
*/
|
|
data->attr_groups[group_tail++] = &lm87_group;
|
|
if (data->channel & CHAN_NO_FAN(0))
|
|
data->attr_groups[group_tail++] = &lm87_group_in6;
|
|
else
|
|
data->attr_groups[group_tail++] = &lm87_group_fan1;
|
|
|
|
if (data->channel & CHAN_NO_FAN(1))
|
|
data->attr_groups[group_tail++] = &lm87_group_in7;
|
|
else
|
|
data->attr_groups[group_tail++] = &lm87_group_fan2;
|
|
|
|
if (data->channel & CHAN_TEMP3)
|
|
data->attr_groups[group_tail++] = &lm87_group_temp3;
|
|
else
|
|
data->attr_groups[group_tail++] = &lm87_group_in0_5;
|
|
|
|
if (!(data->channel & CHAN_NO_VID)) {
|
|
data->vrm = vid_which_vrm();
|
|
data->attr_groups[group_tail++] = &lm87_group_vid;
|
|
}
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(
|
|
&client->dev, client->name, client, data->attr_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
/*
|
|
* Driver data (common to all clients)
|
|
*/
|
|
|
|
static const struct i2c_device_id lm87_id[] = {
|
|
{ "lm87", lm87 },
|
|
{ "adm1024", adm1024 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, lm87_id);
|
|
|
|
static struct i2c_driver lm87_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "lm87",
|
|
},
|
|
.probe = lm87_probe,
|
|
.id_table = lm87_id,
|
|
.detect = lm87_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(lm87_driver);
|
|
|
|
MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de> and others");
|
|
MODULE_DESCRIPTION("LM87 driver");
|
|
MODULE_LICENSE("GPL");
|