![Guenter Roeck](/assets/img/avatar_default.png)
Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
800 lines
23 KiB
C
800 lines
23 KiB
C
/*
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* adm9240.c Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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*
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* Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
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* Philip Edelbrock <phil@netroedge.com>
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* Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
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* Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
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* guidance from Jean Delvare
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*
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* Driver supports Analog Devices ADM9240
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* Dallas Semiconductor DS1780
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* National Semiconductor LM81
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*
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* ADM9240 is the reference, DS1780 and LM81 are register compatibles
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*
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* Voltage Six inputs are scaled by chip, VID also reported
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* Temperature Chip temperature to 0.5'C, maximum and max_hysteris
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* Fans 2 fans, low speed alarm, automatic fan clock divider
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* Alarms 16-bit map of active alarms
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* Analog Out 0..1250 mV output
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*
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* Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
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*
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* Test hardware: Intel SE440BX-2 desktop motherboard --Grant
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*
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* LM81 extended temp reading not implemented
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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/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/hwmon.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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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
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I2C_CLIENT_END };
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enum chips { adm9240, ds1780, lm81 };
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/* ADM9240 registers */
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#define ADM9240_REG_MAN_ID 0x3e
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#define ADM9240_REG_DIE_REV 0x3f
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#define ADM9240_REG_CONFIG 0x40
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#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
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#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
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#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
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#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
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#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
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#define ADM9240_REG_INT(nr) (0x41 + (nr))
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#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
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#define ADM9240_REG_TEMP 0x27
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#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
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#define ADM9240_REG_ANALOG_OUT 0x19
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#define ADM9240_REG_CHASSIS_CLEAR 0x46
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#define ADM9240_REG_VID_FAN_DIV 0x47
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#define ADM9240_REG_I2C_ADDR 0x48
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#define ADM9240_REG_VID4 0x49
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#define ADM9240_REG_TEMP_CONF 0x4b
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/* generalised scaling with integer rounding */
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static inline int SCALE(long val, int mul, int div)
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{
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if (val < 0)
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return (val * mul - div / 2) / div;
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else
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return (val * mul + div / 2) / div;
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}
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/* adm9240 internally scales voltage measurements */
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static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
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static inline unsigned int IN_FROM_REG(u8 reg, int n)
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{
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return SCALE(reg, nom_mv[n], 192);
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}
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static inline u8 IN_TO_REG(unsigned long val, int n)
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{
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return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
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}
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/* temperature range: -40..125, 127 disables temperature alarm */
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static inline s8 TEMP_TO_REG(long val)
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{
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return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127);
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}
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/* two fans, each with low fan speed limit */
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static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
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{
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if (!reg) /* error */
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return -1;
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if (reg == 255)
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return 0;
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return SCALE(1350000, 1, reg * div);
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}
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/* analog out 0..1250mV */
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static inline u8 AOUT_TO_REG(unsigned long val)
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{
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return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255);
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}
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static inline unsigned int AOUT_FROM_REG(u8 reg)
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{
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return SCALE(reg, 1250, 255);
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}
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static int adm9240_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int adm9240_detect(struct i2c_client *client,
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struct i2c_board_info *info);
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static void adm9240_init_client(struct i2c_client *client);
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static int adm9240_remove(struct i2c_client *client);
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static struct adm9240_data *adm9240_update_device(struct device *dev);
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/* driver data */
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static const struct i2c_device_id adm9240_id[] = {
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{ "adm9240", adm9240 },
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{ "ds1780", ds1780 },
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{ "lm81", lm81 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adm9240_id);
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static struct i2c_driver adm9240_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "adm9240",
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},
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.probe = adm9240_probe,
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.remove = adm9240_remove,
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.id_table = adm9240_id,
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.detect = adm9240_detect,
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.address_list = normal_i2c,
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};
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/* per client data */
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struct adm9240_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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char valid;
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unsigned long last_updated_measure;
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unsigned long last_updated_config;
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u8 in[6]; /* ro in0_input */
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u8 in_max[6]; /* rw in0_max */
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u8 in_min[6]; /* rw in0_min */
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u8 fan[2]; /* ro fan1_input */
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u8 fan_min[2]; /* rw fan1_min */
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u8 fan_div[2]; /* rw fan1_div, read-only accessor */
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s16 temp; /* ro temp1_input, 9-bit sign-extended */
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s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
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u16 alarms; /* ro alarms */
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u8 aout; /* rw aout_output */
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u8 vid; /* ro vid */
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u8 vrm; /* -- vrm set on startup, no accessor */
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};
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/*** sysfs accessors ***/
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/* temperature */
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static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
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char *buf)
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{
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
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}
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static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
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}
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static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct i2c_client *client = to_i2c_client(dev);
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struct adm9240_data *data = i2c_get_clientdata(client);
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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_max[attr->index] = TEMP_TO_REG(val);
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i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
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data->temp_max[attr->index]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
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static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
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show_max, set_max, 0);
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static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
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show_max, set_max, 1);
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/* voltage */
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static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
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attr->index));
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}
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static ssize_t show_in_min(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
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attr->index));
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}
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static ssize_t show_in_max(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
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attr->index));
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}
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static ssize_t set_in_min(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct i2c_client *client = to_i2c_client(dev);
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struct adm9240_data *data = i2c_get_clientdata(client);
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unsigned long val;
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int err;
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err = kstrtoul(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[attr->index] = IN_TO_REG(val, attr->index);
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i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
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data->in_min[attr->index]);
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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,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct i2c_client *client = to_i2c_client(dev);
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struct adm9240_data *data = i2c_get_clientdata(client);
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unsigned long val;
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int err;
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err = kstrtoul(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[attr->index] = IN_TO_REG(val, attr->index);
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i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
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data->in_max[attr->index]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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#define vin(nr) \
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static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
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show_in, NULL, nr); \
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static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
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show_in_min, set_in_min, nr); \
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static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
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show_in_max, set_in_max, nr);
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vin(0);
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vin(1);
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vin(2);
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vin(3);
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vin(4);
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vin(5);
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/* fans */
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static ssize_t show_fan(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
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1 << data->fan_div[attr->index]));
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}
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static ssize_t show_fan_min(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
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1 << data->fan_div[attr->index]));
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}
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static ssize_t show_fan_div(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
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}
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/* write new fan div, callers must hold data->update_lock */
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static void adm9240_write_fan_div(struct i2c_client *client, int nr,
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u8 fan_div)
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{
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u8 reg, old, shift = (nr + 2) * 2;
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reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
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old = (reg >> shift) & 3;
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reg &= ~(3 << shift);
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reg |= (fan_div << shift);
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i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
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dev_dbg(&client->dev, "fan%d clock divider changed from %u "
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"to %u\n", nr + 1, 1 << old, 1 << fan_div);
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}
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/*
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* set fan speed low limit:
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*
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* - value is zero: disable fan speed low limit alarm
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*
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* - value is below fan speed measurement range: enable fan speed low
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* limit alarm to be asserted while fan speed too slow to measure
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*
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* - otherwise: select fan clock divider to suit fan speed low limit,
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* measurement code may adjust registers to ensure fan speed reading
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*/
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static ssize_t set_fan_min(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct i2c_client *client = to_i2c_client(dev);
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struct adm9240_data *data = i2c_get_clientdata(client);
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int nr = attr->index;
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u8 new_div;
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unsigned long val;
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int err;
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err = kstrtoul(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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if (!val) {
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data->fan_min[nr] = 255;
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new_div = data->fan_div[nr];
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dev_dbg(&client->dev, "fan%u low limit set disabled\n",
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nr + 1);
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} else if (val < 1350000 / (8 * 254)) {
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new_div = 3;
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data->fan_min[nr] = 254;
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dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
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nr + 1, FAN_FROM_REG(254, 1 << new_div));
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} else {
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unsigned int new_min = 1350000 / val;
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new_div = 0;
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while (new_min > 192 && new_div < 3) {
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new_div++;
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new_min /= 2;
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}
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if (!new_min) /* keep > 0 */
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new_min++;
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data->fan_min[nr] = new_min;
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dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
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nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
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}
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if (new_div != data->fan_div[nr]) {
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data->fan_div[nr] = new_div;
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adm9240_write_fan_div(client, nr, new_div);
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}
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i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
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data->fan_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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#define fan(nr) \
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static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
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show_fan, NULL, nr - 1); \
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static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
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show_fan_div, NULL, nr - 1); \
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static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
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show_fan_min, set_fan_min, nr - 1);
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fan(1);
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fan(2);
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/* alarms */
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static ssize_t show_alarms(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%u\n", data->alarms);
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}
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static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
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static ssize_t show_alarm(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int bitnr = to_sensor_dev_attr(attr)->index;
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struct adm9240_data *data = adm9240_update_device(dev);
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
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}
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static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
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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(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
|
|
|
|
/* vid */
|
|
static ssize_t show_vid(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct adm9240_data *data = adm9240_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);
|
|
|
|
/* analog output */
|
|
static ssize_t show_aout(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct adm9240_data *data = adm9240_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 adm9240_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);
|
|
i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, 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 chassis_clear(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct adm9240_data *data = i2c_get_clientdata(client);
|
|
unsigned long val;
|
|
|
|
if (kstrtoul(buf, 10, &val) || val != 0)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
|
|
data->valid = 0; /* Force cache refresh */
|
|
mutex_unlock(&data->update_lock);
|
|
dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
|
|
|
|
return count;
|
|
}
|
|
static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm,
|
|
chassis_clear, 12);
|
|
|
|
static struct attribute *adm9240_attributes[] = {
|
|
&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_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_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,
|
|
&dev_attr_temp1_input.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_aout_output.attr,
|
|
&sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
|
|
&dev_attr_cpu0_vid.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group adm9240_group = {
|
|
.attrs = adm9240_attributes,
|
|
};
|
|
|
|
|
|
/*** sensor chip detect and driver install ***/
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int adm9240_detect(struct i2c_client *new_client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = new_client->adapter;
|
|
const char *name = "";
|
|
int address = new_client->addr;
|
|
u8 man_id, die_rev;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* verify chip: reg address should match i2c address */
|
|
if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
|
|
!= address) {
|
|
dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
|
|
address);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* check known chip manufacturer */
|
|
man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
|
|
if (man_id == 0x23) {
|
|
name = "adm9240";
|
|
} else if (man_id == 0xda) {
|
|
name = "ds1780";
|
|
} else if (man_id == 0x01) {
|
|
name = "lm81";
|
|
} else {
|
|
dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
|
|
man_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* successful detect, print chip info */
|
|
die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
|
|
dev_info(&adapter->dev, "found %s revision %u\n",
|
|
man_id == 0x23 ? "ADM9240" :
|
|
man_id == 0xda ? "DS1780" : "LM81", die_rev);
|
|
|
|
strlcpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adm9240_probe(struct i2c_client *new_client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct adm9240_data *data;
|
|
int err;
|
|
|
|
data = devm_kzalloc(&new_client->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(new_client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
adm9240_init_client(new_client);
|
|
|
|
/* populate sysfs filesystem */
|
|
err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group);
|
|
if (err)
|
|
return err;
|
|
|
|
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, &adm9240_group);
|
|
return err;
|
|
}
|
|
|
|
static int adm9240_remove(struct i2c_client *client)
|
|
{
|
|
struct adm9240_data *data = i2c_get_clientdata(client);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &adm9240_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void adm9240_init_client(struct i2c_client *client)
|
|
{
|
|
struct adm9240_data *data = i2c_get_clientdata(client);
|
|
u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
|
|
u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
|
|
|
|
data->vrm = vid_which_vrm(); /* need this to report vid as mV */
|
|
|
|
dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
|
|
data->vrm % 10);
|
|
|
|
if (conf & 1) { /* measurement cycle running: report state */
|
|
|
|
dev_info(&client->dev, "status: config 0x%02x mode %u\n",
|
|
conf, mode);
|
|
|
|
} else { /* cold start: open limits before starting chip */
|
|
int i;
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM9240_REG_IN_MIN(i), 0);
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM9240_REG_IN_MAX(i), 255);
|
|
}
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM9240_REG_FAN_MIN(0), 255);
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM9240_REG_FAN_MIN(1), 255);
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM9240_REG_TEMP_MAX(0), 127);
|
|
i2c_smbus_write_byte_data(client,
|
|
ADM9240_REG_TEMP_MAX(1), 127);
|
|
|
|
/* start measurement cycle */
|
|
i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
|
|
|
|
dev_info(&client->dev, "cold start: config was 0x%02x "
|
|
"mode %u\n", conf, mode);
|
|
}
|
|
}
|
|
|
|
static struct adm9240_data *adm9240_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct adm9240_data *data = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
/* minimum measurement cycle: 1.75 seconds */
|
|
if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
|
|
|| !data->valid) {
|
|
|
|
for (i = 0; i < 6; i++) { /* read voltages */
|
|
data->in[i] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_IN(i));
|
|
}
|
|
data->alarms = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_INT(0)) |
|
|
i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_INT(1)) << 8;
|
|
|
|
/*
|
|
* read temperature: assume temperature changes less than
|
|
* 0.5'C per two measurement cycles thus ignore possible
|
|
* but unlikely aliasing error on lsb reading. --Grant
|
|
*/
|
|
data->temp = ((i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_TEMP) << 8) |
|
|
i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_TEMP_CONF)) / 128;
|
|
|
|
for (i = 0; i < 2; i++) { /* read fans */
|
|
data->fan[i] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_FAN(i));
|
|
|
|
/* adjust fan clock divider on overflow */
|
|
if (data->valid && data->fan[i] == 255 &&
|
|
data->fan_div[i] < 3) {
|
|
|
|
adm9240_write_fan_div(client, i,
|
|
++data->fan_div[i]);
|
|
|
|
/* adjust fan_min if active, but not to 0 */
|
|
if (data->fan_min[i] < 255 &&
|
|
data->fan_min[i] >= 2)
|
|
data->fan_min[i] /= 2;
|
|
}
|
|
}
|
|
data->last_updated_measure = jiffies;
|
|
}
|
|
|
|
/* minimum config reading cycle: 300 seconds */
|
|
if (time_after(jiffies, data->last_updated_config + (HZ * 300))
|
|
|| !data->valid) {
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
data->in_min[i] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_IN_MIN(i));
|
|
data->in_max[i] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_IN_MAX(i));
|
|
}
|
|
for (i = 0; i < 2; i++) {
|
|
data->fan_min[i] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_FAN_MIN(i));
|
|
}
|
|
data->temp_max[0] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_TEMP_MAX(0));
|
|
data->temp_max[1] = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_TEMP_MAX(1));
|
|
|
|
/* read fan divs and 5-bit VID */
|
|
i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
|
|
data->fan_div[0] = (i >> 4) & 3;
|
|
data->fan_div[1] = (i >> 6) & 3;
|
|
data->vid = i & 0x0f;
|
|
data->vid |= (i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_VID4) & 1) << 4;
|
|
/* read analog out */
|
|
data->aout = i2c_smbus_read_byte_data(client,
|
|
ADM9240_REG_ANALOG_OUT);
|
|
|
|
data->last_updated_config = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
mutex_unlock(&data->update_lock);
|
|
return data;
|
|
}
|
|
|
|
module_i2c_driver(adm9240_driver);
|
|
|
|
MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
|
|
"Grant Coady <gcoady.lk@gmail.com> and others");
|
|
MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
|
|
MODULE_LICENSE("GPL");
|