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path: root/drivers/hwmon/adm9240.c
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-rw-r--r--drivers/hwmon/adm9240.c831
1 files changed, 831 insertions, 0 deletions
diff --git a/drivers/hwmon/adm9240.c b/drivers/hwmon/adm9240.c
new file mode 100644
index 00000000..c3c2865a
--- /dev/null
+++ b/drivers/hwmon/adm9240.c
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+/*
+ * adm9240.c Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ *
+ * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl>
+ * Philip Edelbrock <phil@netroedge.com>
+ * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl>
+ * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable
+ * guidance from Jean Delvare
+ *
+ * Driver supports Analog Devices ADM9240
+ * Dallas Semiconductor DS1780
+ * National Semiconductor LM81
+ *
+ * ADM9240 is the reference, DS1780 and LM81 are register compatibles
+ *
+ * Voltage Six inputs are scaled by chip, VID also reported
+ * Temperature Chip temperature to 0.5'C, maximum and max_hysteris
+ * Fans 2 fans, low speed alarm, automatic fan clock divider
+ * Alarms 16-bit map of active alarms
+ * Analog Out 0..1250 mV output
+ *
+ * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm'
+ *
+ * Test hardware: Intel SE440BX-2 desktop motherboard --Grant
+ *
+ * LM81 extended temp reading not implemented
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-vid.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
+ I2C_CLIENT_END };
+
+enum chips { adm9240, ds1780, lm81 };
+
+/* ADM9240 registers */
+#define ADM9240_REG_MAN_ID 0x3e
+#define ADM9240_REG_DIE_REV 0x3f
+#define ADM9240_REG_CONFIG 0x40
+
+#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */
+#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2)
+#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2)
+#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */
+#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr))
+#define ADM9240_REG_INT(nr) (0x41 + (nr))
+#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr))
+#define ADM9240_REG_TEMP 0x27
+#define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */
+#define ADM9240_REG_ANALOG_OUT 0x19
+#define ADM9240_REG_CHASSIS_CLEAR 0x46
+#define ADM9240_REG_VID_FAN_DIV 0x47
+#define ADM9240_REG_I2C_ADDR 0x48
+#define ADM9240_REG_VID4 0x49
+#define ADM9240_REG_TEMP_CONF 0x4b
+
+/* generalised scaling with integer rounding */
+static inline int SCALE(long val, int mul, int div)
+{
+ if (val < 0)
+ return (val * mul - div / 2) / div;
+ else
+ return (val * mul + div / 2) / div;
+}
+
+/* adm9240 internally scales voltage measurements */
+static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 };
+
+static inline unsigned int IN_FROM_REG(u8 reg, int n)
+{
+ return SCALE(reg, nom_mv[n], 192);
+}
+
+static inline u8 IN_TO_REG(unsigned long val, int n)
+{
+ return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
+}
+
+/* temperature range: -40..125, 127 disables temperature alarm */
+static inline s8 TEMP_TO_REG(long val)
+{
+ return SENSORS_LIMIT(SCALE(val, 1, 1000), -40, 127);
+}
+
+/* two fans, each with low fan speed limit */
+static inline unsigned int FAN_FROM_REG(u8 reg, u8 div)
+{
+ if (!reg) /* error */
+ return -1;
+
+ if (reg == 255)
+ return 0;
+
+ return SCALE(1350000, 1, reg * div);
+}
+
+/* analog out 0..1250mV */
+static inline u8 AOUT_TO_REG(unsigned long val)
+{
+ return SENSORS_LIMIT(SCALE(val, 255, 1250), 0, 255);
+}
+
+static inline unsigned int AOUT_FROM_REG(u8 reg)
+{
+ return SCALE(reg, 1250, 255);
+}
+
+static int adm9240_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int adm9240_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+static void adm9240_init_client(struct i2c_client *client);
+static int adm9240_remove(struct i2c_client *client);
+static struct adm9240_data *adm9240_update_device(struct device *dev);
+
+/* driver data */
+static const struct i2c_device_id adm9240_id[] = {
+ { "adm9240", adm9240 },
+ { "ds1780", ds1780 },
+ { "lm81", lm81 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adm9240_id);
+
+static struct i2c_driver adm9240_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "adm9240",
+ },
+ .probe = adm9240_probe,
+ .remove = adm9240_remove,
+ .id_table = adm9240_id,
+ .detect = adm9240_detect,
+ .address_list = normal_i2c,
+};
+
+/* per client data */
+struct adm9240_data {
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ char valid;
+ unsigned long last_updated_measure;
+ unsigned long last_updated_config;
+
+ u8 in[6]; /* ro in0_input */
+ u8 in_max[6]; /* rw in0_max */
+ u8 in_min[6]; /* rw in0_min */
+ u8 fan[2]; /* ro fan1_input */
+ u8 fan_min[2]; /* rw fan1_min */
+ u8 fan_div[2]; /* rw fan1_div, read-only accessor */
+ s16 temp; /* ro temp1_input, 9-bit sign-extended */
+ s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */
+ u16 alarms; /* ro alarms */
+ u8 aout; /* rw aout_output */
+ u8 vid; /* ro vid */
+ u8 vrm; /* -- vrm set on startup, no accessor */
+};
+
+/*** sysfs accessors ***/
+
+/* temperature */
+static ssize_t show_temp(struct device *dev, struct device_attribute *dummy,
+ char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp * 500); /* 9-bit value */
+}
+
+static ssize_t show_max(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000);
+}
+
+static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp_max[attr->index] = TEMP_TO_REG(val);
+ i2c_smbus_write_byte_data(client, ADM9240_REG_TEMP_MAX(attr->index),
+ data->temp_max[attr->index]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
+ show_max, set_max, 0);
+static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
+ show_max, set_max, 1);
+
+/* voltage */
+static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index],
+ attr->index));
+}
+
+static ssize_t show_in_min(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index],
+ attr->index));
+}
+
+static ssize_t show_in_max(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index],
+ attr->index));
+}
+
+static ssize_t set_in_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_min[attr->index] = IN_TO_REG(val, attr->index);
+ i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MIN(attr->index),
+ data->in_min[attr->index]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_in_max(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_max[attr->index] = IN_TO_REG(val, attr->index);
+ i2c_smbus_write_byte_data(client, ADM9240_REG_IN_MAX(attr->index),
+ data->in_max[attr->index]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+#define vin(nr) \
+static SENSOR_DEVICE_ATTR(in##nr##_input, S_IRUGO, \
+ show_in, NULL, nr); \
+static SENSOR_DEVICE_ATTR(in##nr##_min, S_IRUGO | S_IWUSR, \
+ show_in_min, set_in_min, nr); \
+static SENSOR_DEVICE_ATTR(in##nr##_max, S_IRUGO | S_IWUSR, \
+ show_in_max, set_in_max, nr);
+
+vin(0);
+vin(1);
+vin(2);
+vin(3);
+vin(4);
+vin(5);
+
+/* fans */
+static ssize_t show_fan(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index],
+ 1 << data->fan_div[attr->index]));
+}
+
+static ssize_t show_fan_min(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index],
+ 1 << data->fan_div[attr->index]));
+}
+
+static ssize_t show_fan_div(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]);
+}
+
+/* write new fan div, callers must hold data->update_lock */
+static void adm9240_write_fan_div(struct i2c_client *client, int nr,
+ u8 fan_div)
+{
+ u8 reg, old, shift = (nr + 2) * 2;
+
+ reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
+ old = (reg >> shift) & 3;
+ reg &= ~(3 << shift);
+ reg |= (fan_div << shift);
+ i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg);
+ dev_dbg(&client->dev, "fan%d clock divider changed from %u "
+ "to %u\n", nr + 1, 1 << old, 1 << fan_div);
+}
+
+/*
+ * set fan speed low limit:
+ *
+ * - value is zero: disable fan speed low limit alarm
+ *
+ * - value is below fan speed measurement range: enable fan speed low
+ * limit alarm to be asserted while fan speed too slow to measure
+ *
+ * - otherwise: select fan clock divider to suit fan speed low limit,
+ * measurement code may adjust registers to ensure fan speed reading
+ */
+static ssize_t set_fan_min(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ int nr = attr->index;
+ u8 new_div;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+
+ if (!val) {
+ data->fan_min[nr] = 255;
+ new_div = data->fan_div[nr];
+
+ dev_dbg(&client->dev, "fan%u low limit set disabled\n",
+ nr + 1);
+
+ } else if (val < 1350000 / (8 * 254)) {
+ new_div = 3;
+ data->fan_min[nr] = 254;
+
+ dev_dbg(&client->dev, "fan%u low limit set minimum %u\n",
+ nr + 1, FAN_FROM_REG(254, 1 << new_div));
+
+ } else {
+ unsigned int new_min = 1350000 / val;
+
+ new_div = 0;
+ while (new_min > 192 && new_div < 3) {
+ new_div++;
+ new_min /= 2;
+ }
+ if (!new_min) /* keep > 0 */
+ new_min++;
+
+ data->fan_min[nr] = new_min;
+
+ dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n",
+ nr + 1, FAN_FROM_REG(new_min, 1 << new_div));
+ }
+
+ if (new_div != data->fan_div[nr]) {
+ data->fan_div[nr] = new_div;
+ adm9240_write_fan_div(client, nr, new_div);
+ }
+ i2c_smbus_write_byte_data(client, ADM9240_REG_FAN_MIN(nr),
+ data->fan_min[nr]);
+
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+#define fan(nr) \
+static SENSOR_DEVICE_ATTR(fan##nr##_input, S_IRUGO, \
+ show_fan, NULL, nr - 1); \
+static SENSOR_DEVICE_ATTR(fan##nr##_div, S_IRUGO, \
+ show_fan_div, NULL, nr - 1); \
+static SENSOR_DEVICE_ATTR(fan##nr##_min, S_IRUGO | S_IWUSR, \
+ show_fan_min, set_fan_min, nr - 1);
+
+fan(1);
+fan(2);
+
+/* alarms */
+static ssize_t show_alarms(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%u\n", data->alarms);
+}
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+static ssize_t show_alarm(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
+}
+static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
+static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
+
+/* vid */
+static ssize_t show_vid(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
+}
+static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+
+/* analog output */
+static ssize_t show_aout(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct adm9240_data *data = adm9240_update_device(dev);
+ return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout));
+}
+
+static ssize_t set_aout(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->aout = AOUT_TO_REG(val);
+ i2c_smbus_write_byte_data(client, ADM9240_REG_ANALOG_OUT, data->aout);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+static DEVICE_ATTR(aout_output, S_IRUGO | S_IWUSR, show_aout, set_aout);
+
+/* chassis_clear */
+static ssize_t chassis_clear_legacy(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ dev_warn(dev, "Attribute chassis_clear is deprecated, "
+ "use intrusion0_alarm instead\n");
+
+ if (val == 1) {
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_CHASSIS_CLEAR, 0x80);
+ dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
+ }
+ return count;
+}
+static DEVICE_ATTR(chassis_clear, S_IWUSR, NULL, chassis_clear_legacy);
+
+static ssize_t chassis_clear(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ unsigned long val;
+
+ if (kstrtoul(buf, 10, &val) || val != 0)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ i2c_smbus_write_byte_data(client, ADM9240_REG_CHASSIS_CLEAR, 0x80);
+ data->valid = 0; /* Force cache refresh */
+ mutex_unlock(&data->update_lock);
+ dev_dbg(&client->dev, "chassis intrusion latch cleared\n");
+
+ return count;
+}
+static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR, show_alarm,
+ chassis_clear, 12);
+
+static struct attribute *adm9240_attributes[] = {
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_min.dev_attr.attr,
+ &sensor_dev_attr_in0_max.dev_attr.attr,
+ &sensor_dev_attr_in0_alarm.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in3_alarm.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in4_alarm.dev_attr.attr,
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in5_min.dev_attr.attr,
+ &sensor_dev_attr_in5_max.dev_attr.attr,
+ &sensor_dev_attr_in5_alarm.dev_attr.attr,
+ &dev_attr_temp1_input.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
+ &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ &dev_attr_alarms.attr,
+ &dev_attr_aout_output.attr,
+ &dev_attr_chassis_clear.attr,
+ &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
+ &dev_attr_cpu0_vid.attr,
+ NULL
+};
+
+static const struct attribute_group adm9240_group = {
+ .attrs = adm9240_attributes,
+};
+
+
+/*** sensor chip detect and driver install ***/
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int adm9240_detect(struct i2c_client *new_client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = new_client->adapter;
+ const char *name = "";
+ int address = new_client->addr;
+ u8 man_id, die_rev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* verify chip: reg address should match i2c address */
+ if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR)
+ != address) {
+ dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n",
+ address);
+ return -ENODEV;
+ }
+
+ /* check known chip manufacturer */
+ man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID);
+ if (man_id == 0x23) {
+ name = "adm9240";
+ } else if (man_id == 0xda) {
+ name = "ds1780";
+ } else if (man_id == 0x01) {
+ name = "lm81";
+ } else {
+ dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n",
+ man_id);
+ return -ENODEV;
+ }
+
+ /* successful detect, print chip info */
+ die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV);
+ dev_info(&adapter->dev, "found %s revision %u\n",
+ man_id == 0x23 ? "ADM9240" :
+ man_id == 0xda ? "DS1780" : "LM81", die_rev);
+
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int adm9240_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
+{
+ struct adm9240_data *data;
+ int err;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(new_client, data);
+ mutex_init(&data->update_lock);
+
+ adm9240_init_client(new_client);
+
+ /* populate sysfs filesystem */
+ err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group);
+ if (err)
+ goto exit_free;
+
+ data->hwmon_dev = hwmon_device_register(&new_client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove;
+ }
+
+ return 0;
+
+exit_remove:
+ sysfs_remove_group(&new_client->dev.kobj, &adm9240_group);
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int adm9240_remove(struct i2c_client *client)
+{
+ struct adm9240_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &adm9240_group);
+
+ kfree(data);
+ return 0;
+}
+
+static void adm9240_init_client(struct i2c_client *client)
+{
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ u8 conf = i2c_smbus_read_byte_data(client, ADM9240_REG_CONFIG);
+ u8 mode = i2c_smbus_read_byte_data(client, ADM9240_REG_TEMP_CONF) & 3;
+
+ data->vrm = vid_which_vrm(); /* need this to report vid as mV */
+
+ dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10,
+ data->vrm % 10);
+
+ if (conf & 1) { /* measurement cycle running: report state */
+
+ dev_info(&client->dev, "status: config 0x%02x mode %u\n",
+ conf, mode);
+
+ } else { /* cold start: open limits before starting chip */
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_IN_MIN(i), 0);
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_IN_MAX(i), 255);
+ }
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_FAN_MIN(0), 255);
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_FAN_MIN(1), 255);
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_TEMP_MAX(0), 127);
+ i2c_smbus_write_byte_data(client,
+ ADM9240_REG_TEMP_MAX(1), 127);
+
+ /* start measurement cycle */
+ i2c_smbus_write_byte_data(client, ADM9240_REG_CONFIG, 1);
+
+ dev_info(&client->dev, "cold start: config was 0x%02x "
+ "mode %u\n", conf, mode);
+ }
+}
+
+static struct adm9240_data *adm9240_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm9240_data *data = i2c_get_clientdata(client);
+ int i;
+
+ mutex_lock(&data->update_lock);
+
+ /* minimum measurement cycle: 1.75 seconds */
+ if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4))
+ || !data->valid) {
+
+ for (i = 0; i < 6; i++) { /* read voltages */
+ data->in[i] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_IN(i));
+ }
+ data->alarms = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_INT(0)) |
+ i2c_smbus_read_byte_data(client,
+ ADM9240_REG_INT(1)) << 8;
+
+ /*
+ * read temperature: assume temperature changes less than
+ * 0.5'C per two measurement cycles thus ignore possible
+ * but unlikely aliasing error on lsb reading. --Grant
+ */
+ data->temp = ((i2c_smbus_read_byte_data(client,
+ ADM9240_REG_TEMP) << 8) |
+ i2c_smbus_read_byte_data(client,
+ ADM9240_REG_TEMP_CONF)) / 128;
+
+ for (i = 0; i < 2; i++) { /* read fans */
+ data->fan[i] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_FAN(i));
+
+ /* adjust fan clock divider on overflow */
+ if (data->valid && data->fan[i] == 255 &&
+ data->fan_div[i] < 3) {
+
+ adm9240_write_fan_div(client, i,
+ ++data->fan_div[i]);
+
+ /* adjust fan_min if active, but not to 0 */
+ if (data->fan_min[i] < 255 &&
+ data->fan_min[i] >= 2)
+ data->fan_min[i] /= 2;
+ }
+ }
+ data->last_updated_measure = jiffies;
+ }
+
+ /* minimum config reading cycle: 300 seconds */
+ if (time_after(jiffies, data->last_updated_config + (HZ * 300))
+ || !data->valid) {
+
+ for (i = 0; i < 6; i++) {
+ data->in_min[i] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_IN_MIN(i));
+ data->in_max[i] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_IN_MAX(i));
+ }
+ for (i = 0; i < 2; i++) {
+ data->fan_min[i] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_FAN_MIN(i));
+ }
+ data->temp_max[0] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_TEMP_MAX(0));
+ data->temp_max[1] = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_TEMP_MAX(1));
+
+ /* read fan divs and 5-bit VID */
+ i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV);
+ data->fan_div[0] = (i >> 4) & 3;
+ data->fan_div[1] = (i >> 6) & 3;
+ data->vid = i & 0x0f;
+ data->vid |= (i2c_smbus_read_byte_data(client,
+ ADM9240_REG_VID4) & 1) << 4;
+ /* read analog out */
+ data->aout = i2c_smbus_read_byte_data(client,
+ ADM9240_REG_ANALOG_OUT);
+
+ data->last_updated_config = jiffies;
+ data->valid = 1;
+ }
+ mutex_unlock(&data->update_lock);
+ return data;
+}
+
+module_i2c_driver(adm9240_driver);
+
+MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, "
+ "Grant Coady <gcoady.lk@gmail.com> and others");
+MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver");
+MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-12-20 10:05:54 +0000