--- /dev/null
+/*
+ * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
+ *
+ * Copyright (C) 2006 Corentin LABBE <corentin.labbe@geomatys.fr>
+ *
+ * Based on LM83 Driver by Jean Delvare <khali@linux-fr.org>
+ *
+ * Give only processor, motherboard temperatures and fan tachs
+ * Very rare chip please let me know if you use it
+ *
+ * http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
+ *
+ *
+ * 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 version 2 of the License
+ *
+ * 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-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+/*
+ * Addresses to scan
+ */
+
+static unsigned short normal_i2c[] = {
+ 0x28, 0x29, 0x2a,
+ 0x2b, 0x2c, 0x2d,
+ 0x2e, 0x2f, I2C_CLIENT_END
+};
+
+/*
+ * Insmod parameters
+ */
+
+I2C_CLIENT_INSMOD_1(adm1029);
+
+/*
+ * The ADM1029 registers
+ * Manufacturer ID is 0x41 for Analog Devices
+ */
+
+#define ADM1029_REG_MAN_ID 0x0D
+#define ADM1029_REG_CHIP_ID 0x0E
+#define ADM1029_REG_CONFIG 0x01
+#define ADM1029_REG_NB_FAN_SUPPORT 0x02
+
+#define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06
+
+#define ADM1029_REG_LOCAL_TEMP 0xA0
+#define ADM1029_REG_REMOTE1_TEMP 0xA1
+#define ADM1029_REG_REMOTE2_TEMP 0xA2
+
+#define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
+#define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
+#define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92
+
+#define ADM1029_REG_LOCAL_TEMP_LOW 0x98
+#define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
+#define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A
+
+#define ADM1029_REG_FAN1 0x70
+#define ADM1029_REG_FAN2 0x71
+
+#define ADM1029_REG_FAN1_MIN 0x78
+#define ADM1029_REG_FAN2_MIN 0x79
+
+#define ADM1029_REG_FAN1_CONFIG 0x68
+#define ADM1029_REG_FAN2_CONFIG 0x69
+
+#define TEMP_FROM_REG(val) ((val) * 1000)
+
+#define DIV_FROM_REG(val) ( 1 << (((val) >> 6) - 1))
+
+/* Registers to be checked by adm1029_update_device() */
+static const u8 ADM1029_REG_TEMP[] = {
+ ADM1029_REG_LOCAL_TEMP,
+ ADM1029_REG_REMOTE1_TEMP,
+ ADM1029_REG_REMOTE2_TEMP,
+ ADM1029_REG_LOCAL_TEMP_HIGH,
+ ADM1029_REG_REMOTE1_TEMP_HIGH,
+ ADM1029_REG_REMOTE2_TEMP_HIGH,
+ ADM1029_REG_LOCAL_TEMP_LOW,
+ ADM1029_REG_REMOTE1_TEMP_LOW,
+ ADM1029_REG_REMOTE2_TEMP_LOW,
+};
+
+static const u8 ADM1029_REG_FAN[] = {
+ ADM1029_REG_FAN1,
+ ADM1029_REG_FAN2,
+ ADM1029_REG_FAN1_MIN,
+ ADM1029_REG_FAN2_MIN,
+};
+
+static const u8 ADM1029_REG_FAN_DIV[] = {
+ ADM1029_REG_FAN1_CONFIG,
+ ADM1029_REG_FAN2_CONFIG,
+};
+
+/*
+ * Functions declaration
+ */
+
+static int adm1029_attach_adapter(struct i2c_adapter *adapter);
+static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
+static int adm1029_detach_client(struct i2c_client *client);
+static struct adm1029_data *adm1029_update_device(struct device *dev);
+static int adm1029_init_client(struct i2c_client *client);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static struct i2c_driver adm1029_driver = {
+ .driver = {
+ .name = "adm1029",
+ },
+ .attach_adapter = adm1029_attach_adapter,
+ .detach_client = adm1029_detach_client,
+};
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct adm1029_data {
+ struct i2c_client client;
+ struct class_device *class_dev;
+ struct mutex update_lock;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* registers values, signed for temperature, unsigned for other stuff */
+ s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
+ u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
+ u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
+};
+
+/*
+ * Sysfs stuff
+ */
+
+static ssize_t
+show_temp(struct device *dev, struct device_attribute *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct adm1029_data *data = adm1029_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
+}
+
+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 adm1029_data *data = adm1029_update_device(dev);
+ u16 val;
+ if (data->fan[attr->index] == 0 || data->fan_div[attr->index] == 0
+ || data->fan[attr->index] == 255) {
+ return sprintf(buf, "0\n");
+ }
+
+ val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
+ / data->fan[attr->index];
+ return sprintf(buf, "%d\n", val);
+}
+
+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 adm1029_data *data = adm1029_update_device(dev);
+ if (data->fan_div[attr->index] == 0)
+ return sprintf(buf, "0\n");
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
+}
+
+static ssize_t set_fan_div(struct device *dev,
+ struct device_attribute *devattr, const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1029_data *data = i2c_get_clientdata(client);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ long val = simple_strtol(buf, NULL, 10);
+ u8 reg;
+
+ mutex_lock(&data->update_lock);
+
+ /*Read actual config */
+ reg = i2c_smbus_read_byte_data(client,
+ ADM1029_REG_FAN_DIV[attr->index]);
+
+ switch (val) {
+ case 1:
+ val = 1;
+ break;
+ case 2:
+ val = 2;
+ break;
+ case 4:
+ val = 3;
+ break;
+ default:
+ mutex_unlock(&data->update_lock);
+ dev_err(&client->dev, "fan_div value %ld not "
+ "supported. Choose one of 1, 2 or 4!\n", val);
+ return -EINVAL;
+ }
+ /* Update the value */
+ reg = (reg & 0x3F) | (val << 6);
+
+ /* Write value */
+ i2c_smbus_write_byte_data(client,
+ ADM1029_REG_FAN_DIV[attr->index], reg);
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+/*
+Access rights on sysfs, S_IRUGO stand for Is Readable by User, Group and Others
+ S_IWUSR stand for Is Writable by User
+*/
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
+
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5);
+
+static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8);
+
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
+
+static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3);
+
+static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
+ show_fan_div, set_fan_div, 0);
+static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
+ show_fan_div, set_fan_div, 1);
+
+static struct attribute *adm1029_attributes[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_min.dev_attr.attr,
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group adm1029_group = {
+ .attrs = adm1029_attributes,
+};
+
+/*
+ * Real code
+ */
+
+static int adm1029_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_probe(adapter, &addr_data, adm1029_detect);
+}
+
+/*
+ * The following function does more than just detection. If detection
+ * succeeds, it also registers the new chip.
+ */
+
+static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *client;
+ struct adm1029_data *data;
+ int err = 0;
+ const char *name = "";
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto exit;
+
+ if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ client = &data->client;
+ i2c_set_clientdata(client, data);
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &adm1029_driver;
+
+ /* Now we do the detection and identification. A negative kind
+ * means that the driver was loaded with no force parameter
+ * (default), so we must both detect and identify the chip
+ * (actually there is only one possible kind of chip for now, adm1029).
+ * A zero kind means that the driver was loaded with the force
+ * parameter, the detection step shall be skipped. A positive kind
+ * means that the driver was loaded with the force parameter and a
+ * given kind of chip is requested, so both the detection and the
+ * identification steps are skipped. */
+
+ /* Default to an adm1029 if forced */
+ if (kind == 0)
+ kind = adm1029;
+
+ /* ADM1029 doesn't have CHIP ID, check just MAN ID
+ * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
+ * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
+ * documented
+ */
+
+ if (kind <= 0) { /* identification */
+ u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
+
+ man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
+ chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
+ temp_devices_installed = i2c_smbus_read_byte_data(client,
+ ADM1029_REG_TEMP_DEVICES_INSTALLED);
+ nb_fan_support = i2c_smbus_read_byte_data(client,
+ ADM1029_REG_NB_FAN_SUPPORT);
+ /* 0x41 is Analog Devices */
+ if (man_id == 0x41 && (temp_devices_installed & 0xf9) == 0x01
+ && nb_fan_support == 0x03) {
+ if ((chip_id & 0xF0) == 0x00) {
+ kind = adm1029;
+ } else {
+ /* There are no "official" CHIP ID, so actually
+ * we use Major/Minor revision for that */
+ printk(KERN_INFO
+ "adm1029: Unknown major revision %x, "
+ "please let us know\n", chip_id);
+ }
+ }
+
+ if (kind <= 0) { /* identification failed */
+ pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
+ "chip_id=0x%02X)\n", man_id, chip_id);
+ goto exit_free;
+ }
+ }
+
+ if (kind == adm1029) {
+ name = "adm1029";
+ }
+
+ /* We can fill in the remaining client fields */
+ strlcpy(client->name, name, I2C_NAME_SIZE);
+ mutex_init(&data->update_lock);
+
+ /* Tell the I2C layer a new client has arrived */
+ if ((err = i2c_attach_client(client)))
+ goto exit_free;
+
+ /*
+ * Initialize the ADM1029 chip
+ * Check config register
+ */
+ if (adm1029_init_client(client) == 0)
+ goto exit_detach;
+
+ /* Register sysfs hooks */
+ if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
+ goto exit_detach;
+
+ data->class_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->class_dev)) {
+ err = PTR_ERR(data->class_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+ exit_remove_files:
+ sysfs_remove_group(&client->dev.kobj, &adm1029_group);
+ exit_detach:
+ i2c_detach_client(client);
+ exit_free:
+ kfree(data);
+ exit:
+ return err;
+}
+
+static int adm1029_init_client(struct i2c_client *client)
+{
+ u8 config;
+ config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
+ if ((config & 0x10) == 0) {
+ i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
+ config | 0x10);
+ }
+ /* recheck config */
+ config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
+ if ((config & 0x10) == 0) {
+ dev_err(&client->dev, "Initialization failed!\n");
+ return 0;
+ }
+ return 1;
+}
+
+static int adm1029_detach_client(struct i2c_client *client)
+{
+ struct adm1029_data *data = i2c_get_clientdata(client);
+ int err;
+
+ hwmon_device_unregister(data->class_dev);
+ sysfs_remove_group(&client->dev.kobj, &adm1029_group);
+
+ if ((err = i2c_detach_client(client)))
+ return err;
+
+ kfree(data);
+ return 0;
+}
+
+/*
+function that update the status of the chips (temperature for exemple)
+*/
+static struct adm1029_data *adm1029_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1029_data *data = i2c_get_clientdata(client);
+
+ mutex_lock(&data->update_lock);
+ /*
+ * Use the "cache" Luke, don't recheck values
+ * if there are already checked not a long time later
+ */
+ if (time_after(jiffies, data->last_updated + HZ * 2)
+ || !data->valid) {
+ int nr;
+
+ dev_dbg(&client->dev, "Updating adm1029 data\n");
+
+ for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
+ data->temp[nr] =
+ i2c_smbus_read_byte_data(client,
+ ADM1029_REG_TEMP[nr]);
+ }
+ for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
+ data->fan[nr] =
+ i2c_smbus_read_byte_data(client,
+ ADM1029_REG_FAN[nr]);
+ }
+ for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
+ data->fan_div[nr] =
+ i2c_smbus_read_byte_data(client,
+ ADM1029_REG_FAN_DIV[nr]);
+ }
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+/*
+ Common module stuff
+*/
+static int __init sensors_adm1029_init(void)
+{
+
+ return i2c_add_driver(&adm1029_driver);
+}
+
+static void __exit sensors_adm1029_exit(void)
+{
+
+ i2c_del_driver(&adm1029_driver);
+}
+
+MODULE_AUTHOR("Corentin LABBE <corentin.labbe@geomatys.fr>");
+MODULE_DESCRIPTION("adm1029 driver");
+MODULE_LICENSE("GPL v2");
+
+module_init(sensors_adm1029_init);
+module_exit(sensors_adm1029_exit);
projects / linux-2.6 / commitdiff