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![Jean Delvare](/assets/img/avatar_default.png)
What was true of reading the VRM value is also true of writing it: not being a register value, it doesn't need hardware access, so we don't need a reference to the i2c client. This allows for a minor code cleanup. As gcc appears to be smart enough to simplify the generated code by itself, this cleanup only affects the source code, the generated binaries are unchanged. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
990 lines
30 KiB
C
990 lines
30 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) 2004,2007 Jean Delvare <khali@linux-fr.org>
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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 assumes that
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* the BIOS configured the chip correctly. In that respect, it differs from
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* the original driver (from lm_sensors for Linux 2.4), which would force the
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* LM87 to an arbitrary, compile-time chosen mode, regardless of the actual
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* chipset wiring.
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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 unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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/*
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* Insmod parameters
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*/
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I2C_CLIENT_INSMOD_2(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) * 192 >= (scale) * 255 ? 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 : (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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* Functions declaration
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*/
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static int lm87_attach_adapter(struct i2c_adapter *adapter);
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static int lm87_detect(struct i2c_adapter *adapter, int address, int kind);
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static void lm87_init_client(struct i2c_client *client);
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static int lm87_detach_client(struct i2c_client *client);
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static struct lm87_data *lm87_update_device(struct device *dev);
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/*
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* Driver data (common to all clients)
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*/
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static struct i2c_driver lm87_driver = {
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.driver = {
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.name = "lm87",
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},
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.attach_adapter = lm87_attach_adapter,
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.detach_client = lm87_detach_client,
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};
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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 i2c_client client;
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struct device *hwmon_dev;
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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 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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};
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/*
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* Sysfs stuff
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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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#define show_in(offset) \
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static ssize_t show_in##offset##_input(struct device *dev, 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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return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
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data->in_scale[offset])); \
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} \
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static ssize_t show_in##offset##_min(struct device *dev, 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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return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
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data->in_scale[offset])); \
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} \
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static ssize_t show_in##offset##_max(struct device *dev, 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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return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
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data->in_scale[offset])); \
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} \
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static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
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show_in##offset##_input, NULL);
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show_in(0);
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show_in(1);
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show_in(2);
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show_in(3);
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show_in(4);
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show_in(5);
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show_in(6);
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show_in(7);
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static void set_in_min(struct device *dev, const char *buf, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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long val = simple_strtol(buf, NULL, 10);
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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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}
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static void set_in_max(struct device *dev, const char *buf, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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long val = simple_strtol(buf, NULL, 10);
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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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}
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#define set_in(offset) \
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static ssize_t set_in##offset##_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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set_in_min(dev, buf, offset); \
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return count; \
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} \
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static ssize_t set_in##offset##_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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set_in_max(dev, buf, offset); \
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return count; \
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} \
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static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
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show_in##offset##_min, set_in##offset##_min); \
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static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
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show_in##offset##_max, set_in##offset##_max);
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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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#define show_temp(offset) \
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static ssize_t show_temp##offset##_input(struct device *dev, 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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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
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} \
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static ssize_t show_temp##offset##_low(struct device *dev, 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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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[offset-1])); \
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} \
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static ssize_t show_temp##offset##_high(struct device *dev, 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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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[offset-1])); \
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}\
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static DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
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show_temp##offset##_input, NULL);
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show_temp(1);
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show_temp(2);
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show_temp(3);
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static void set_temp_low(struct device *dev, const char *buf, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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long val = simple_strtol(buf, NULL, 10);
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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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}
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static void set_temp_high(struct device *dev, const char *buf, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm87_data *data = i2c_get_clientdata(client);
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long val = simple_strtol(buf, NULL, 10);
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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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}
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#define set_temp(offset) \
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static ssize_t set_temp##offset##_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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set_temp_low(dev, buf, offset-1); \
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return count; \
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} \
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static ssize_t set_temp##offset##_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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set_temp_high(dev, buf, offset-1); \
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return count; \
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} \
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static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
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show_temp##offset##_high, set_temp##offset##_high); \
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static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
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show_temp##offset##_low, set_temp##offset##_low);
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set_temp(1);
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set_temp(2);
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set_temp(3);
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static ssize_t show_temp_crit_int(struct device *dev, 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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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_int));
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}
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static ssize_t show_temp_crit_ext(struct device *dev, 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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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit_ext));
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}
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static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit_int, NULL);
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static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit_ext, NULL);
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static DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit_ext, NULL);
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#define show_fan(offset) \
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static ssize_t show_fan##offset##_input(struct device *dev, 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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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[offset-1], \
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FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
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} \
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static ssize_t show_fan##offset##_min(struct device *dev, 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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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[offset-1], \
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FAN_DIV_FROM_REG(data->fan_div[offset-1]))); \
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} \
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static ssize_t show_fan##offset##_div(struct device *dev, 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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return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[offset-1])); \
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} \
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static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
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show_fan##offset##_input, NULL);
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show_fan(1);
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show_fan(2);
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static void set_fan_min(struct device *dev, const char *buf, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
long val = simple_strtol(buf, NULL, 10);
|
|
|
|
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);
|
|
}
|
|
|
|
/* 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, const char *buf,
|
|
size_t count, int nr)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
long val = simple_strtol(buf, NULL, 10);
|
|
unsigned long min;
|
|
u8 reg;
|
|
|
|
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 ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
|
|
size_t count) \
|
|
{ \
|
|
set_fan_min(dev, buf, offset-1); \
|
|
return count; \
|
|
} \
|
|
static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
|
|
size_t count) \
|
|
{ \
|
|
return set_fan_div(dev, buf, count, offset-1); \
|
|
} \
|
|
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
|
|
show_fan##offset##_min, set_fan##offset##_min); \
|
|
static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
|
|
show_fan##offset##_div, set_fan##offset##_div);
|
|
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);
|
|
data->vrm = simple_strtoul(buf, NULL, 10);
|
|
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 = to_i2c_client(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
long val = simple_strtol(buf, NULL, 10);
|
|
|
|
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 int lm87_attach_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
if (!(adapter->class & I2C_CLASS_HWMON))
|
|
return 0;
|
|
return i2c_probe(adapter, &addr_data, lm87_detect);
|
|
}
|
|
|
|
static struct attribute *lm87_attributes[] = {
|
|
&dev_attr_in1_input.attr,
|
|
&dev_attr_in1_min.attr,
|
|
&dev_attr_in1_max.attr,
|
|
&sensor_dev_attr_in1_alarm.dev_attr.attr,
|
|
&dev_attr_in2_input.attr,
|
|
&dev_attr_in2_min.attr,
|
|
&dev_attr_in2_max.attr,
|
|
&sensor_dev_attr_in2_alarm.dev_attr.attr,
|
|
&dev_attr_in3_input.attr,
|
|
&dev_attr_in3_min.attr,
|
|
&dev_attr_in3_max.attr,
|
|
&sensor_dev_attr_in3_alarm.dev_attr.attr,
|
|
&dev_attr_in4_input.attr,
|
|
&dev_attr_in4_min.attr,
|
|
&dev_attr_in4_max.attr,
|
|
&sensor_dev_attr_in4_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_temp1_input.attr,
|
|
&dev_attr_temp1_max.attr,
|
|
&dev_attr_temp1_min.attr,
|
|
&dev_attr_temp1_crit.attr,
|
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
|
|
&dev_attr_temp2_input.attr,
|
|
&dev_attr_temp2_max.attr,
|
|
&dev_attr_temp2_min.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_opt[] = {
|
|
&dev_attr_in6_input.attr,
|
|
&dev_attr_in6_min.attr,
|
|
&dev_attr_in6_max.attr,
|
|
&sensor_dev_attr_in6_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_fan1_input.attr,
|
|
&dev_attr_fan1_min.attr,
|
|
&dev_attr_fan1_div.attr,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_in7_input.attr,
|
|
&dev_attr_in7_min.attr,
|
|
&dev_attr_in7_max.attr,
|
|
&sensor_dev_attr_in7_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_fan2_input.attr,
|
|
&dev_attr_fan2_min.attr,
|
|
&dev_attr_fan2_div.attr,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_temp3_input.attr,
|
|
&dev_attr_temp3_max.attr,
|
|
&dev_attr_temp3_min.attr,
|
|
&dev_attr_temp3_crit.attr,
|
|
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_fault.dev_attr.attr,
|
|
|
|
&dev_attr_in0_input.attr,
|
|
&dev_attr_in0_min.attr,
|
|
&dev_attr_in0_max.attr,
|
|
&sensor_dev_attr_in0_alarm.dev_attr.attr,
|
|
&dev_attr_in5_input.attr,
|
|
&dev_attr_in5_min.attr,
|
|
&dev_attr_in5_max.attr,
|
|
&sensor_dev_attr_in5_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_cpu0_vid.attr,
|
|
&dev_attr_vrm.attr,
|
|
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm87_group_opt = {
|
|
.attrs = lm87_attributes_opt,
|
|
};
|
|
|
|
/*
|
|
* The following function does more than just detection. If detection
|
|
* succeeds, it also registers the new chip.
|
|
*/
|
|
static int lm87_detect(struct i2c_adapter *adapter, int address, int kind)
|
|
{
|
|
struct i2c_client *new_client;
|
|
struct lm87_data *data;
|
|
int err = 0;
|
|
static const char *names[] = { "lm87", "adm1024" };
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
goto exit;
|
|
|
|
if (!(data = kzalloc(sizeof(struct lm87_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
/* The common I2C client data is placed right before the
|
|
LM87-specific data. */
|
|
new_client = &data->client;
|
|
i2c_set_clientdata(new_client, data);
|
|
new_client->addr = address;
|
|
new_client->adapter = adapter;
|
|
new_client->driver = &lm87_driver;
|
|
new_client->flags = 0;
|
|
|
|
/* Default to an LM87 if forced */
|
|
if (kind == 0)
|
|
kind = lm87;
|
|
|
|
/* Now, we do the remaining detection. */
|
|
if (kind < 0) {
|
|
u8 cid = lm87_read_value(new_client, LM87_REG_COMPANY_ID);
|
|
u8 rev = lm87_read_value(new_client, LM87_REG_REVISION);
|
|
|
|
if (cid == 0x02 /* National Semiconductor */
|
|
&& (rev >= 0x01 && rev <= 0x08))
|
|
kind = lm87;
|
|
else if (cid == 0x41 /* Analog Devices */
|
|
&& (rev & 0xf0) == 0x10)
|
|
kind = adm1024;
|
|
|
|
if (kind < 0
|
|
|| (lm87_read_value(new_client, LM87_REG_CONFIG) & 0x80)) {
|
|
dev_dbg(&adapter->dev,
|
|
"LM87 detection failed at 0x%02x.\n",
|
|
address);
|
|
goto exit_free;
|
|
}
|
|
}
|
|
|
|
/* We can fill in the remaining client fields */
|
|
strlcpy(new_client->name, names[kind - 1], I2C_NAME_SIZE);
|
|
data->valid = 0;
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Tell the I2C layer a new client has arrived */
|
|
if ((err = i2c_attach_client(new_client)))
|
|
goto exit_free;
|
|
|
|
/* Initialize the LM87 chip */
|
|
lm87_init_client(new_client);
|
|
|
|
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;
|
|
|
|
/* Register sysfs hooks */
|
|
if ((err = sysfs_create_group(&new_client->dev.kobj, &lm87_group)))
|
|
goto exit_detach;
|
|
|
|
if (data->channel & CHAN_NO_FAN(0)) {
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_in6_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in6_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in6_max))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_in6_alarm.dev_attr)))
|
|
goto exit_remove;
|
|
} else {
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_fan1_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_fan1_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_fan1_div))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr)))
|
|
goto exit_remove;
|
|
}
|
|
|
|
if (data->channel & CHAN_NO_FAN(1)) {
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_in7_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in7_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in7_max))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_in7_alarm.dev_attr)))
|
|
goto exit_remove;
|
|
} else {
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_fan2_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_fan2_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_fan2_div))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr)))
|
|
goto exit_remove;
|
|
}
|
|
|
|
if (data->channel & CHAN_TEMP3) {
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_temp3_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_temp3_max))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_temp3_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_temp3_crit))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_temp3_alarm.dev_attr))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_temp3_fault.dev_attr)))
|
|
goto exit_remove;
|
|
} else {
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_in0_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in0_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in0_max))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_in0_alarm.dev_attr))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in5_input))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in5_min))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_in5_max))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_in5_alarm.dev_attr)))
|
|
goto exit_remove;
|
|
}
|
|
|
|
if (!(data->channel & CHAN_NO_VID)) {
|
|
data->vrm = vid_which_vrm();
|
|
if ((err = device_create_file(&new_client->dev,
|
|
&dev_attr_cpu0_vid))
|
|
|| (err = device_create_file(&new_client->dev,
|
|
&dev_attr_vrm)))
|
|
goto exit_remove;
|
|
}
|
|
|
|
data->hwmon_dev = hwmon_device_register(&new_client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto exit_remove;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove:
|
|
sysfs_remove_group(&new_client->dev.kobj, &lm87_group);
|
|
sysfs_remove_group(&new_client->dev.kobj, &lm87_group_opt);
|
|
exit_detach:
|
|
i2c_detach_client(new_client);
|
|
exit_free:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static void lm87_init_client(struct i2c_client *client)
|
|
{
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
u8 config;
|
|
|
|
data->channel = lm87_read_value(client, LM87_REG_CHANNEL_MODE);
|
|
|
|
config = lm87_read_value(client, LM87_REG_CONFIG);
|
|
if (!(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);
|
|
}
|
|
}
|
|
if ((config & 0x81) != 0x01) {
|
|
/* Start monitoring */
|
|
lm87_write_value(client, LM87_REG_CONFIG,
|
|
(config & 0xF7) | 0x01);
|
|
}
|
|
}
|
|
|
|
static int lm87_detach_client(struct i2c_client *client)
|
|
{
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
int err;
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &lm87_group);
|
|
sysfs_remove_group(&client->dev.kobj, &lm87_group_opt);
|
|
|
|
if ((err = i2c_detach_client(client)))
|
|
return err;
|
|
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
|
|
static struct lm87_data *lm87_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm87_data *data = i2c_get_clientdata(client);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
|
|
int i, j;
|
|
|
|
dev_dbg(&client->dev, "Updating data.\n");
|
|
|
|
i = (data->channel & CHAN_TEMP3) ? 1 : 0;
|
|
j = (data->channel & CHAN_TEMP3) ? 5 : 6;
|
|
for (; i < j; i++) {
|
|
data->in[i] = lm87_read_value(client,
|
|
LM87_REG_IN(i));
|
|
data->in_min[i] = lm87_read_value(client,
|
|
LM87_REG_IN_MIN(i));
|
|
data->in_max[i] = lm87_read_value(client,
|
|
LM87_REG_IN_MAX(i));
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
if (data->channel & CHAN_NO_FAN(i)) {
|
|
data->in[6+i] = lm87_read_value(client,
|
|
LM87_REG_AIN(i));
|
|
data->in_max[6+i] = lm87_read_value(client,
|
|
LM87_REG_AIN_MAX(i));
|
|
data->in_min[6+i] = lm87_read_value(client,
|
|
LM87_REG_AIN_MIN(i));
|
|
|
|
} else {
|
|
data->fan[i] = lm87_read_value(client,
|
|
LM87_REG_FAN(i));
|
|
data->fan_min[i] = lm87_read_value(client,
|
|
LM87_REG_FAN_MIN(i));
|
|
}
|
|
}
|
|
|
|
j = (data->channel & CHAN_TEMP3) ? 3 : 2;
|
|
for (i = 0 ; i < j; i++) {
|
|
data->temp[i] = lm87_read_value(client,
|
|
LM87_REG_TEMP[i]);
|
|
data->temp_high[i] = lm87_read_value(client,
|
|
LM87_REG_TEMP_HIGH[i]);
|
|
data->temp_low[i] = lm87_read_value(client,
|
|
LM87_REG_TEMP_LOW[i]);
|
|
}
|
|
|
|
i = lm87_read_value(client, LM87_REG_TEMP_HW_INT_LOCK);
|
|
j = lm87_read_value(client, LM87_REG_TEMP_HW_INT);
|
|
data->temp_crit_int = min(i, j);
|
|
|
|
i = lm87_read_value(client, LM87_REG_TEMP_HW_EXT_LOCK);
|
|
j = lm87_read_value(client, LM87_REG_TEMP_HW_EXT);
|
|
data->temp_crit_ext = min(i, j);
|
|
|
|
i = lm87_read_value(client, LM87_REG_VID_FAN_DIV);
|
|
data->fan_div[0] = (i >> 4) & 0x03;
|
|
data->fan_div[1] = (i >> 6) & 0x03;
|
|
data->vid = (i & 0x0F)
|
|
| (lm87_read_value(client, LM87_REG_VID4) & 0x01)
|
|
<< 4;
|
|
|
|
data->alarms = lm87_read_value(client, LM87_REG_ALARMS1)
|
|
| (lm87_read_value(client, LM87_REG_ALARMS2)
|
|
<< 8);
|
|
data->aout = lm87_read_value(client, LM87_REG_AOUT);
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
static int __init sensors_lm87_init(void)
|
|
{
|
|
return i2c_add_driver(&lm87_driver);
|
|
}
|
|
|
|
static void __exit sensors_lm87_exit(void)
|
|
{
|
|
i2c_del_driver(&lm87_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org> and others");
|
|
MODULE_DESCRIPTION("LM87 driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sensors_lm87_init);
|
|
module_exit(sensors_lm87_exit);
|