diff options
Diffstat (limited to 'drivers/hwmon/gl520sm.c')
| -rw-r--r-- | drivers/hwmon/gl520sm.c | 932 |
1 files changed, 932 insertions, 0 deletions
diff --git a/drivers/hwmon/gl520sm.c b/drivers/hwmon/gl520sm.c new file mode 100644 index 000000000..dee93ec87 --- /dev/null +++ b/drivers/hwmon/gl520sm.c @@ -0,0 +1,932 @@ +/* + * 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 + +/* Client data */ +struct gl520_data { + struct i2c_client *client; + const struct attribute_group *groups[3]; + 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; +}; + +/* + * 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 i2c_smbus_read_word_swapped(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_swapped(client, reg, value); + else + return i2c_smbus_write_byte_data(client, reg, value); +} + +static struct gl520_data *gl520_update_device(struct device *dev) +{ + struct gl520_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->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; +} + +/* + * 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) clamp_val((((val) * 4 + 47) / 95), 0, 255) + +#define IN_FROM_REG(val) ((val) * 19) +#define IN_TO_REG(val) clamp_val((((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 gl520_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int n = to_sensor_dev_attr(attr)->index; + u8 r; + long v; + int err; + + err = kstrtol(buf, 10, &v); + if (err) + return err; + + 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 gl520_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int n = to_sensor_dev_attr(attr)->index; + u8 r; + long v; + int err; + + err = kstrtol(buf, 10, &v); + if (err) + return err; + + 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 : \ + clamp_val((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 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; + + 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 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 set_fan_off(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(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) clamp_val(((((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 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 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 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 set_beep_mask(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(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 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"); |