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![Guenter Roeck](/assets/img/avatar_default.png)
Writes into limit attributes can overflow due to multplications and additions with unbound input values. Writing into fan limit attributes can result in a crash with a division by zero if very large values are written and the fan divider is larger than 1. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
939 lines
26 KiB
C
939 lines
26 KiB
C
/*
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* gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
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* Kyösti Mälkki <kmalkki@cc.hut.fi>
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* Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
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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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*/
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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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#include <linux/sysfs.h>
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/* Type of the extra sensor */
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static unsigned short extra_sensor_type;
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module_param(extra_sensor_type, ushort, 0);
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MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
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/*
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* Many GL520 constants specified below
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* One of the inputs can be configured as either temp or voltage.
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* That's why _TEMP2 and _IN4 access the same register
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*/
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/* The GL520 registers */
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#define GL520_REG_CHIP_ID 0x00
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#define GL520_REG_REVISION 0x01
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#define GL520_REG_CONF 0x03
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#define GL520_REG_MASK 0x11
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#define GL520_REG_VID_INPUT 0x02
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static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
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static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
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static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
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static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
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static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
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static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
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static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
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#define GL520_REG_FAN_INPUT 0x07
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#define GL520_REG_FAN_MIN 0x08
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#define GL520_REG_FAN_DIV 0x0f
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#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
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#define GL520_REG_ALARMS 0x12
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#define GL520_REG_BEEP_MASK 0x10
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#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
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/* Client data */
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struct gl520_data {
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struct i2c_client *client;
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const struct attribute_group *groups[3];
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struct mutex update_lock;
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char valid; /* zero until the following fields are valid */
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unsigned long last_updated; /* in jiffies */
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u8 vid;
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u8 vrm;
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u8 in_input[5]; /* [0] = VVD */
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u8 in_min[5]; /* [0] = VDD */
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u8 in_max[5]; /* [0] = VDD */
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u8 fan_input[2];
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u8 fan_min[2];
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u8 fan_div[2];
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u8 fan_off;
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u8 temp_input[2];
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u8 temp_max[2];
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u8 temp_max_hyst[2];
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u8 alarms;
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u8 beep_enable;
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u8 beep_mask;
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u8 alarm_mask;
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u8 two_temps;
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};
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/*
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* Registers 0x07 to 0x0c are word-sized, others are byte-sized
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* GL520 uses a high-byte first convention
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*/
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static int gl520_read_value(struct i2c_client *client, u8 reg)
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{
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if ((reg >= 0x07) && (reg <= 0x0c))
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return i2c_smbus_read_word_swapped(client, reg);
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else
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
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{
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if ((reg >= 0x07) && (reg <= 0x0c))
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return i2c_smbus_write_word_swapped(client, reg, value);
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else
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static struct gl520_data *gl520_update_device(struct device *dev)
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{
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struct gl520_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int val, i;
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
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dev_dbg(&client->dev, "Starting gl520sm update\n");
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data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
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data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
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data->vid = gl520_read_value(client,
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GL520_REG_VID_INPUT) & 0x1f;
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for (i = 0; i < 4; i++) {
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data->in_input[i] = gl520_read_value(client,
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GL520_REG_IN_INPUT[i]);
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val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
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data->in_min[i] = val & 0xff;
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data->in_max[i] = (val >> 8) & 0xff;
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}
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val = gl520_read_value(client, GL520_REG_FAN_INPUT);
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data->fan_input[0] = (val >> 8) & 0xff;
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data->fan_input[1] = val & 0xff;
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val = gl520_read_value(client, GL520_REG_FAN_MIN);
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data->fan_min[0] = (val >> 8) & 0xff;
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data->fan_min[1] = val & 0xff;
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data->temp_input[0] = gl520_read_value(client,
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GL520_REG_TEMP_INPUT[0]);
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data->temp_max[0] = gl520_read_value(client,
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GL520_REG_TEMP_MAX[0]);
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data->temp_max_hyst[0] = gl520_read_value(client,
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GL520_REG_TEMP_MAX_HYST[0]);
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val = gl520_read_value(client, GL520_REG_FAN_DIV);
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data->fan_div[0] = (val >> 6) & 0x03;
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data->fan_div[1] = (val >> 4) & 0x03;
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data->fan_off = (val >> 2) & 0x01;
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data->alarms &= data->alarm_mask;
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val = gl520_read_value(client, GL520_REG_CONF);
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data->beep_enable = !((val >> 2) & 1);
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/* Temp1 and Vin4 are the same input */
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if (data->two_temps) {
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data->temp_input[1] = gl520_read_value(client,
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GL520_REG_TEMP_INPUT[1]);
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data->temp_max[1] = gl520_read_value(client,
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GL520_REG_TEMP_MAX[1]);
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data->temp_max_hyst[1] = gl520_read_value(client,
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GL520_REG_TEMP_MAX_HYST[1]);
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} else {
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data->in_input[4] = gl520_read_value(client,
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GL520_REG_IN_INPUT[4]);
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data->in_min[4] = gl520_read_value(client,
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GL520_REG_IN_MIN[4]);
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data->in_max[4] = gl520_read_value(client,
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GL520_REG_IN_MAX[4]);
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}
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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/*
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* Sysfs stuff
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*/
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static ssize_t cpu0_vid_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct gl520_data *data = gl520_update_device(dev);
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return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
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}
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static DEVICE_ATTR_RO(cpu0_vid);
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#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4)
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#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4)
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#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
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#define IN_FROM_REG(val) ((val) * 19)
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#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19)
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#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
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static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int n = to_sensor_dev_attr(attr)->index;
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struct gl520_data *data = gl520_update_device(dev);
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u8 r = data->in_input[n];
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if (n == 0)
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return sprintf(buf, "%d\n", VDD_FROM_REG(r));
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else
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return sprintf(buf, "%d\n", IN_FROM_REG(r));
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}
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static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int n = to_sensor_dev_attr(attr)->index;
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struct gl520_data *data = gl520_update_device(dev);
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u8 r = data->in_min[n];
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if (n == 0)
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return sprintf(buf, "%d\n", VDD_FROM_REG(r));
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else
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return sprintf(buf, "%d\n", IN_FROM_REG(r));
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}
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static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int n = to_sensor_dev_attr(attr)->index;
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struct gl520_data *data = gl520_update_device(dev);
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u8 r = data->in_max[n];
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if (n == 0)
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return sprintf(buf, "%d\n", VDD_FROM_REG(r));
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else
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return sprintf(buf, "%d\n", IN_FROM_REG(r));
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}
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static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct gl520_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int n = to_sensor_dev_attr(attr)->index;
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u8 r;
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long v;
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int err;
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err = kstrtol(buf, 10, &v);
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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 (n == 0)
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r = VDD_TO_REG(v);
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else
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r = IN_TO_REG(v);
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data->in_min[n] = r;
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if (n < 4)
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gl520_write_value(client, GL520_REG_IN_MIN[n],
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(gl520_read_value(client, GL520_REG_IN_MIN[n])
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& ~0xff) | r);
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else
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gl520_write_value(client, GL520_REG_IN_MIN[n], r);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct gl520_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int n = to_sensor_dev_attr(attr)->index;
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u8 r;
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long v;
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int err;
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err = kstrtol(buf, 10, &v);
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if (err)
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return err;
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if (n == 0)
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r = VDD_TO_REG(v);
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else
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r = IN_TO_REG(v);
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mutex_lock(&data->update_lock);
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data->in_max[n] = r;
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if (n < 4)
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gl520_write_value(client, GL520_REG_IN_MAX[n],
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(gl520_read_value(client, GL520_REG_IN_MAX[n])
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& ~0xff00) | (r << 8));
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else
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gl520_write_value(client, GL520_REG_IN_MAX[n], r);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
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static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
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static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
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static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
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static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
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static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
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get_in_min, set_in_min, 0);
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static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
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get_in_min, set_in_min, 1);
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static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
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get_in_min, set_in_min, 2);
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static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
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get_in_min, set_in_min, 3);
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static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
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get_in_min, set_in_min, 4);
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static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
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get_in_max, set_in_max, 0);
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static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
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get_in_max, set_in_max, 1);
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static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
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get_in_max, set_in_max, 2);
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static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
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get_in_max, set_in_max, 3);
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static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
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get_in_max, set_in_max, 4);
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#define DIV_FROM_REG(val) (1 << (val))
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#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
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#define FAN_BASE(div) (480000 >> (div))
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#define FAN_CLAMP(val, div) clamp_val(val, FAN_BASE(div) / 255, \
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FAN_BASE(div))
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#define FAN_TO_REG(val, div) ((val) == 0 ? 0 : \
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DIV_ROUND_CLOSEST(480000, \
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FAN_CLAMP(val, div) << (div)))
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static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int n = to_sensor_dev_attr(attr)->index;
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struct gl520_data *data = gl520_update_device(dev);
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
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data->fan_div[n]));
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}
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static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int n = to_sensor_dev_attr(attr)->index;
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struct gl520_data *data = gl520_update_device(dev);
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
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data->fan_div[n]));
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}
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static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int n = to_sensor_dev_attr(attr)->index;
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struct gl520_data *data = gl520_update_device(dev);
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
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}
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static ssize_t fan1_off_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct gl520_data *data = gl520_update_device(dev);
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return sprintf(buf, "%d\n", data->fan_off);
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}
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static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct gl520_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int n = to_sensor_dev_attr(attr)->index;
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u8 r;
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unsigned long v;
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int err;
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err = kstrtoul(buf, 10, &v);
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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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r = FAN_TO_REG(v, data->fan_div[n]);
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data->fan_min[n] = r;
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if (n == 0)
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gl520_write_value(client, GL520_REG_FAN_MIN,
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(gl520_read_value(client, GL520_REG_FAN_MIN)
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& ~0xff00) | (r << 8));
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else
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gl520_write_value(client, GL520_REG_FAN_MIN,
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(gl520_read_value(client, GL520_REG_FAN_MIN)
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& ~0xff) | r);
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data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
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if (data->fan_min[n] == 0)
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data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
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else
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data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
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data->beep_mask &= data->alarm_mask;
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gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
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mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int n = to_sensor_dev_attr(attr)->index;
|
|
u8 r;
|
|
unsigned long v;
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &v);
|
|
if (err)
|
|
return err;
|
|
|
|
switch (v) {
|
|
case 1:
|
|
r = 0;
|
|
break;
|
|
case 2:
|
|
r = 1;
|
|
break;
|
|
case 4:
|
|
r = 2;
|
|
break;
|
|
case 8:
|
|
r = 3;
|
|
break;
|
|
default:
|
|
dev_err(&client->dev,
|
|
"fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->fan_div[n] = r;
|
|
|
|
if (n == 0)
|
|
gl520_write_value(client, GL520_REG_FAN_DIV,
|
|
(gl520_read_value(client, GL520_REG_FAN_DIV)
|
|
& ~0xc0) | (r << 6));
|
|
else
|
|
gl520_write_value(client, GL520_REG_FAN_DIV,
|
|
(gl520_read_value(client, GL520_REG_FAN_DIV)
|
|
& ~0x30) | (r << 4));
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t fan1_off_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
u8 r;
|
|
unsigned long v;
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &v);
|
|
if (err)
|
|
return err;
|
|
|
|
r = (v ? 1 : 0);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->fan_off = r;
|
|
gl520_write_value(client, GL520_REG_FAN_OFF,
|
|
(gl520_read_value(client, GL520_REG_FAN_OFF)
|
|
& ~0x0c) | (r << 2));
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
|
|
get_fan_min, set_fan_min, 0);
|
|
static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
|
|
get_fan_min, set_fan_min, 1);
|
|
static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
|
|
get_fan_div, set_fan_div, 0);
|
|
static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
|
|
get_fan_div, set_fan_div, 1);
|
|
static DEVICE_ATTR_RW(fan1_off);
|
|
|
|
#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
|
|
#define TEMP_CLAMP(val) clamp_val(val, -130000, 125000)
|
|
#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 130)
|
|
|
|
static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int n = to_sensor_dev_attr(attr)->index;
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
|
|
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
|
|
}
|
|
|
|
static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int n = to_sensor_dev_attr(attr)->index;
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
|
|
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
|
|
}
|
|
|
|
static ssize_t get_temp_max_hyst(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int n = to_sensor_dev_attr(attr)->index;
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
|
|
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
|
|
}
|
|
|
|
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int n = to_sensor_dev_attr(attr)->index;
|
|
long v;
|
|
int err;
|
|
|
|
err = kstrtol(buf, 10, &v);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->temp_max[n] = TEMP_TO_REG(v);
|
|
gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
|
|
*attr, const char *buf, size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int n = to_sensor_dev_attr(attr)->index;
|
|
long v;
|
|
int err;
|
|
|
|
err = kstrtol(buf, 10, &v);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->temp_max_hyst[n] = TEMP_TO_REG(v);
|
|
gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
|
|
data->temp_max_hyst[n]);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
|
|
get_temp_max, set_temp_max, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
|
|
get_temp_max, set_temp_max, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
|
|
get_temp_max_hyst, set_temp_max_hyst, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
|
|
get_temp_max_hyst, set_temp_max_hyst, 1);
|
|
|
|
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->alarms);
|
|
}
|
|
|
|
static ssize_t beep_enable_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->beep_enable);
|
|
}
|
|
|
|
static ssize_t beep_mask_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->beep_mask);
|
|
}
|
|
|
|
static ssize_t beep_enable_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
u8 r;
|
|
unsigned long v;
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &v);
|
|
if (err)
|
|
return err;
|
|
|
|
r = (v ? 0 : 1);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->beep_enable = !r;
|
|
gl520_write_value(client, GL520_REG_BEEP_ENABLE,
|
|
(gl520_read_value(client, GL520_REG_BEEP_ENABLE)
|
|
& ~0x04) | (r << 2));
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t beep_mask_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
unsigned long r;
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &r);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
r &= data->alarm_mask;
|
|
data->beep_mask = r;
|
|
gl520_write_value(client, GL520_REG_BEEP_MASK, r);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR_RO(alarms);
|
|
static DEVICE_ATTR_RW(beep_enable);
|
|
static DEVICE_ATTR_RW(beep_mask);
|
|
|
|
static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int bit_nr = to_sensor_dev_attr(attr)->index;
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
|
|
return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
|
|
|
|
static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
int bitnr = to_sensor_dev_attr(attr)->index;
|
|
struct gl520_data *data = gl520_update_device(dev);
|
|
|
|
return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
|
|
}
|
|
|
|
static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct gl520_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int bitnr = to_sensor_dev_attr(attr)->index;
|
|
unsigned long bit;
|
|
|
|
int err;
|
|
|
|
err = kstrtoul(buf, 10, &bit);
|
|
if (err)
|
|
return err;
|
|
if (bit & ~1)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
|
|
if (bit)
|
|
data->beep_mask |= (1 << bitnr);
|
|
else
|
|
data->beep_mask &= ~(1 << bitnr);
|
|
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
|
|
static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
|
|
static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
|
|
static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
|
|
static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
|
|
static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
|
|
static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
|
|
static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
|
|
static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
|
|
|
|
static struct attribute *gl520_attributes[] = {
|
|
&dev_attr_cpu0_vid.attr,
|
|
|
|
&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_in0_beep.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_in1_beep.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_in2_beep.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_in3_beep.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_beep.dev_attr.attr,
|
|
&dev_attr_fan1_off.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_beep.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp1_input.dev_attr.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_temp1_beep.dev_attr.attr,
|
|
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_beep_enable.attr,
|
|
&dev_attr_beep_mask.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group gl520_group = {
|
|
.attrs = gl520_attributes,
|
|
};
|
|
|
|
static struct attribute *gl520_attributes_in4[] = {
|
|
&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_in4_beep.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute *gl520_attributes_temp2[] = {
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_beep.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group gl520_group_in4 = {
|
|
.attrs = gl520_attributes_in4,
|
|
};
|
|
|
|
static const struct attribute_group gl520_group_temp2 = {
|
|
.attrs = gl520_attributes_temp2,
|
|
};
|
|
|
|
|
|
/*
|
|
* Real code
|
|
*/
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
|
I2C_FUNC_SMBUS_WORD_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Determine the chip type. */
|
|
if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
|
|
((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
|
|
((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
|
|
dev_dbg(&client->dev, "Unknown chip type, skipping\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called when we have found a new GL520SM. */
|
|
static void gl520_init_client(struct i2c_client *client)
|
|
{
|
|
struct gl520_data *data = i2c_get_clientdata(client);
|
|
u8 oldconf, conf;
|
|
|
|
conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
|
|
|
|
data->alarm_mask = 0xff;
|
|
data->vrm = vid_which_vrm();
|
|
|
|
if (extra_sensor_type == 1)
|
|
conf &= ~0x10;
|
|
else if (extra_sensor_type == 2)
|
|
conf |= 0x10;
|
|
data->two_temps = !(conf & 0x10);
|
|
|
|
/* If IRQ# is disabled, we can safely force comparator mode */
|
|
if (!(conf & 0x20))
|
|
conf &= 0xf7;
|
|
|
|
/* Enable monitoring if needed */
|
|
conf |= 0x40;
|
|
|
|
if (conf != oldconf)
|
|
gl520_write_value(client, GL520_REG_CONF, conf);
|
|
|
|
gl520_update_device(&(client->dev));
|
|
|
|
if (data->fan_min[0] == 0)
|
|
data->alarm_mask &= ~0x20;
|
|
if (data->fan_min[1] == 0)
|
|
data->alarm_mask &= ~0x40;
|
|
|
|
data->beep_mask &= data->alarm_mask;
|
|
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
|
|
}
|
|
|
|
static int gl520_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct device *hwmon_dev;
|
|
struct gl520_data *data;
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct gl520_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
data->client = client;
|
|
|
|
/* Initialize the GL520SM chip */
|
|
gl520_init_client(client);
|
|
|
|
/* sysfs hooks */
|
|
data->groups[0] = &gl520_group;
|
|
|
|
if (data->two_temps)
|
|
data->groups[1] = &gl520_group_temp2;
|
|
else
|
|
data->groups[1] = &gl520_group_in4;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
|
data, data->groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id gl520_id[] = {
|
|
{ "gl520sm", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, gl520_id);
|
|
|
|
static struct i2c_driver gl520_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "gl520sm",
|
|
},
|
|
.probe = gl520_probe,
|
|
.id_table = gl520_id,
|
|
.detect = gl520_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(gl520_driver);
|
|
|
|
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
|
|
"Kyösti Mälkki <kmalkki@cc.hut.fi>, "
|
|
"Maarten Deprez <maartendeprez@users.sourceforge.net>");
|
|
MODULE_DESCRIPTION("GL520SM driver");
|
|
MODULE_LICENSE("GPL");
|