/* gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware monitoring Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>, Kyösti Mälkki <kmalkki@cc.hut.fi> Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon-vid.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/sysfs.h> /* Type of the extra sensor */ static unsigned short extra_sensor_type; module_param(extra_sensor_type, ushort, 0); MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)"); /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; /* Many GL520 constants specified below One of the inputs can be configured as either temp or voltage. That's why _TEMP2 and _IN4 access the same register */ /* The GL520 registers */ #define GL520_REG_CHIP_ID 0x00 #define GL520_REG_REVISION 0x01 #define GL520_REG_CONF 0x03 #define GL520_REG_MASK 0x11 #define GL520_REG_VID_INPUT 0x02 static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e }; static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b }; static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 }; static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 }; static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e }; static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 }; static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 }; #define GL520_REG_FAN_INPUT 0x07 #define GL520_REG_FAN_MIN 0x08 #define GL520_REG_FAN_DIV 0x0f #define GL520_REG_FAN_OFF GL520_REG_FAN_DIV #define GL520_REG_ALARMS 0x12 #define GL520_REG_BEEP_MASK 0x10 #define GL520_REG_BEEP_ENABLE GL520_REG_CONF /* * Function declarations */ static int gl520_probe(struct i2c_client *client, const struct i2c_device_id *id); static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info); static void gl520_init_client(struct i2c_client *client); static int gl520_remove(struct i2c_client *client); static int gl520_read_value(struct i2c_client *client, u8 reg); static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value); static struct gl520_data *gl520_update_device(struct device *dev); /* Driver data */ 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, .remove = gl520_remove, .id_table = gl520_id, .detect = gl520_detect, .address_list = normal_i2c, }; /* Client data */ struct gl520_data { struct device *hwmon_dev; struct mutex update_lock; char valid; /* zero until the following fields are valid */ unsigned long last_updated; /* in jiffies */ u8 vid; u8 vrm; u8 in_input[5]; /* [0] = VVD */ u8 in_min[5]; /* [0] = VDD */ u8 in_max[5]; /* [0] = VDD */ u8 fan_input[2]; u8 fan_min[2]; u8 fan_div[2]; u8 fan_off; u8 temp_input[2]; u8 temp_max[2]; u8 temp_max_hyst[2]; u8 alarms; u8 beep_enable; u8 beep_mask; u8 alarm_mask; u8 two_temps; }; /* * Sysfs stuff */ static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr, char *buf) { struct gl520_data *data = gl520_update_device(dev); return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); } static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL); #define VDD_FROM_REG(val) (((val)*95+2)/4) #define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255)) #define IN_FROM_REG(val) ((val)*19) #define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255)) static ssize_t get_in_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); u8 r = data->in_input[n]; if (n == 0) return sprintf(buf, "%d\n", VDD_FROM_REG(r)); else return sprintf(buf, "%d\n", IN_FROM_REG(r)); } static ssize_t get_in_min(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); u8 r = data->in_min[n]; if (n == 0) return sprintf(buf, "%d\n", VDD_FROM_REG(r)); else return sprintf(buf, "%d\n", IN_FROM_REG(r)); } static ssize_t get_in_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); u8 r = data->in_max[n]; if (n == 0) return sprintf(buf, "%d\n", VDD_FROM_REG(r)); else return sprintf(buf, "%d\n", IN_FROM_REG(r)); } static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int n = to_sensor_dev_attr(attr)->index; long v = simple_strtol(buf, NULL, 10); u8 r; mutex_lock(&data->update_lock); if (n == 0) r = VDD_TO_REG(v); else r = IN_TO_REG(v); data->in_min[n] = r; if (n < 4) gl520_write_value(client, GL520_REG_IN_MIN[n], (gl520_read_value(client, GL520_REG_IN_MIN[n]) & ~0xff) | r); else gl520_write_value(client, GL520_REG_IN_MIN[n], r); mutex_unlock(&data->update_lock); return count; } static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int n = to_sensor_dev_attr(attr)->index; long v = simple_strtol(buf, NULL, 10); u8 r; if (n == 0) r = VDD_TO_REG(v); else r = IN_TO_REG(v); mutex_lock(&data->update_lock); data->in_max[n] = r; if (n < 4) gl520_write_value(client, GL520_REG_IN_MAX[n], (gl520_read_value(client, GL520_REG_IN_MAX[n]) & ~0xff00) | (r << 8)); else gl520_write_value(client, GL520_REG_IN_MAX[n], r); mutex_unlock(&data->update_lock); return count; } static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0); static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1); static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2); static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3); static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4); static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR, get_in_min, set_in_min, 0); static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR, get_in_min, set_in_min, 1); static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR, get_in_min, set_in_min, 2); static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR, get_in_min, set_in_min, 3); static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR, get_in_min, set_in_min, 4); static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR, get_in_max, set_in_max, 0); static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR, get_in_max, set_in_max, 1); static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR, get_in_max, set_in_max, 2); static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR, get_in_max, set_in_max, 3); static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR, get_in_max, set_in_max, 4); #define DIV_FROM_REG(val) (1 << (val)) #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div)))) #define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255)) static ssize_t get_fan_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", FAN_FROM_REG(data->fan_input[n], data->fan_div[n])); } static ssize_t get_fan_min(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", FAN_FROM_REG(data->fan_min[n], data->fan_div[n])); } static ssize_t get_fan_div(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", DIV_FROM_REG(data->fan_div[n])); } static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr, char *buf) { struct gl520_data *data = gl520_update_device(dev); return sprintf(buf, "%d\n", data->fan_off); } static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int n = to_sensor_dev_attr(attr)->index; unsigned long v = simple_strtoul(buf, NULL, 10); u8 r; mutex_lock(&data->update_lock); r = FAN_TO_REG(v, data->fan_div[n]); data->fan_min[n] = r; if (n == 0) gl520_write_value(client, GL520_REG_FAN_MIN, (gl520_read_value(client, GL520_REG_FAN_MIN) & ~0xff00) | (r << 8)); else gl520_write_value(client, GL520_REG_FAN_MIN, (gl520_read_value(client, GL520_REG_FAN_MIN) & ~0xff) | r); data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); if (data->fan_min[n] == 0) data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40; else data->alarm_mask |= (n == 0) ? 0x20 : 0x40; data->beep_mask &= data->alarm_mask; gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask); 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 i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int n = to_sensor_dev_attr(attr)->index; unsigned long v = simple_strtoul(buf, NULL, 10); u8 r; 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 set_fan_off(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); u8 r = simple_strtoul(buf, NULL, 10)?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(fan1_off, S_IRUGO | S_IWUSR, get_fan_off, set_fan_off); #define TEMP_FROM_REG(val) (((val) - 130) * 1000) #define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255)) 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 i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int n = to_sensor_dev_attr(attr)->index; long v = simple_strtol(buf, NULL, 10); 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 i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int n = to_sensor_dev_attr(attr)->index; long v = simple_strtol(buf, NULL, 10); 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 get_alarms(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 get_beep_enable(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 get_beep_mask(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 set_beep_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); u8 r = simple_strtoul(buf, NULL, 10)?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 set_beep_mask(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); u8 r = simple_strtoul(buf, NULL, 10); 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(alarms, S_IRUGO, get_alarms, NULL); static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, get_beep_enable, set_beep_enable); static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, get_beep_mask, set_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 i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int bitnr = to_sensor_dev_attr(attr)->index; unsigned long bit; bit = simple_strtoul(buf, NULL, 10); 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_opt[] = { &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, &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_opt = { .attrs = gl520_attributes_opt, }; /* * 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; } static int gl520_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct gl520_data *data; int err; data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL); if (!data) { err = -ENOMEM; goto exit; } i2c_set_clientdata(client, data); mutex_init(&data->update_lock); /* Initialize the GL520SM chip */ gl520_init_client(client); /* Register sysfs hooks */ if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group))) goto exit_free; if (data->two_temps) { if ((err = device_create_file(&client->dev, &sensor_dev_attr_temp2_input.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_temp2_max.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_temp2_max_hyst.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_temp2_alarm.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_temp2_beep.dev_attr))) goto exit_remove_files; } else { if ((err = device_create_file(&client->dev, &sensor_dev_attr_in4_input.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_in4_min.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_in4_max.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_in4_alarm.dev_attr)) || (err = device_create_file(&client->dev, &sensor_dev_attr_in4_beep.dev_attr))) goto exit_remove_files; } data->hwmon_dev = hwmon_device_register(&client->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove_files; } return 0; exit_remove_files: sysfs_remove_group(&client->dev.kobj, &gl520_group); sysfs_remove_group(&client->dev.kobj, &gl520_group_opt); exit_free: kfree(data); exit: return err; } /* 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_remove(struct i2c_client *client) { struct gl520_data *data = i2c_get_clientdata(client); hwmon_device_unregister(data->hwmon_dev); sysfs_remove_group(&client->dev.kobj, &gl520_group); sysfs_remove_group(&client->dev.kobj, &gl520_group_opt); kfree(data); return 0; } /* Registers 0x07 to 0x0c are word-sized, others are byte-sized GL520 uses a high-byte first convention */ static int gl520_read_value(struct i2c_client *client, u8 reg) { if ((reg >= 0x07) && (reg <= 0x0c)) return swab16(i2c_smbus_read_word_data(client, reg)); else return i2c_smbus_read_byte_data(client, reg); } static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value) { if ((reg >= 0x07) && (reg <= 0x0c)) return i2c_smbus_write_word_data(client, reg, swab16(value)); else return i2c_smbus_write_byte_data(client, reg, value); } static struct gl520_data *gl520_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct gl520_data *data = i2c_get_clientdata(client); int val, i; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { dev_dbg(&client->dev, "Starting gl520sm update\n"); data->alarms = gl520_read_value(client, GL520_REG_ALARMS); data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK); data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f; for (i = 0; i < 4; i++) { data->in_input[i] = gl520_read_value(client, GL520_REG_IN_INPUT[i]); val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]); data->in_min[i] = val & 0xff; data->in_max[i] = (val >> 8) & 0xff; } val = gl520_read_value(client, GL520_REG_FAN_INPUT); data->fan_input[0] = (val >> 8) & 0xff; data->fan_input[1] = val & 0xff; val = gl520_read_value(client, GL520_REG_FAN_MIN); data->fan_min[0] = (val >> 8) & 0xff; data->fan_min[1] = val & 0xff; data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP_INPUT[0]); data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP_MAX[0]); data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP_MAX_HYST[0]); val = gl520_read_value(client, GL520_REG_FAN_DIV); data->fan_div[0] = (val >> 6) & 0x03; data->fan_div[1] = (val >> 4) & 0x03; data->fan_off = (val >> 2) & 0x01; data->alarms &= data->alarm_mask; val = gl520_read_value(client, GL520_REG_CONF); data->beep_enable = !((val >> 2) & 1); /* Temp1 and Vin4 are the same input */ if (data->two_temps) { data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP_INPUT[1]); data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP_MAX[1]); data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP_MAX_HYST[1]); } else { data->in_input[4] = gl520_read_value(client, GL520_REG_IN_INPUT[4]); data->in_min[4] = gl520_read_value(client, GL520_REG_IN_MIN[4]); data->in_max[4] = gl520_read_value(client, GL520_REG_IN_MAX[4]); } data->last_updated = jiffies; data->valid = 1; } mutex_unlock(&data->update_lock); return data; } static int __init sensors_gl520sm_init(void) { return i2c_add_driver(&gl520_driver); } static void __exit sensors_gl520sm_exit(void) { i2c_del_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"); module_init(sensors_gl520sm_init); module_exit(sensors_gl520sm_exit);