--- /dev/null
+/*
+ thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
+ monitoring
+ Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
+ Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
+ Philip Edelbrock <phil@netroedge.com>
+
+ 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/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+MODULE_LICENSE("GPL");
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_2(thmc50, adm1022);
+I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
+ "to enable 3rd temperature (ADM1022 only)");
+
+/* Many THMC50 constants specified below */
+
+/* The THMC50 registers */
+#define THMC50_REG_CONF 0x40
+#define THMC50_REG_COMPANY_ID 0x3E
+#define THMC50_REG_DIE_CODE 0x3F
+#define THMC50_REG_ANALOG_OUT 0x19
+
+const static u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
+const static u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
+const static u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
+
+#define THMC50_REG_CONF_nFANOFF 0x20
+
+/* Each client has this additional data */
+struct thmc50_data {
+ struct i2c_client client;
+ struct class_device *class_dev;
+
+ struct mutex update_lock;
+ enum chips type;
+ unsigned long last_updated; /* In jiffies */
+ char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
+ char valid; /* !=0 if following fields are valid */
+
+ /* Register values */
+ s8 temp_input[3];
+ s8 temp_max[3];
+ s8 temp_min[3];
+ u8 analog_out;
+};
+
+static int thmc50_attach_adapter(struct i2c_adapter *adapter);
+static int thmc50_detach_client(struct i2c_client *client);
+static void thmc50_init_client(struct i2c_client *client);
+static struct thmc50_data *thmc50_update_device(struct device *dev);
+
+static struct i2c_driver thmc50_driver = {
+ .driver = {
+ .name = "thmc50",
+ },
+ .attach_adapter = thmc50_attach_adapter,
+ .detach_client = thmc50_detach_client,
+};
+
+static ssize_t show_analog_out(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct thmc50_data *data = thmc50_update_device(dev);
+ return sprintf(buf, "%d\n", data->analog_out);
+}
+
+static ssize_t set_analog_out(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct thmc50_data *data = i2c_get_clientdata(client);
+ int tmp = simple_strtoul(buf, NULL, 10);
+ int config;
+
+ mutex_lock(&data->update_lock);
+ data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
+ i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
+ data->analog_out);
+
+ config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+ if (data->analog_out == 0)
+ config &= ~THMC50_REG_CONF_nFANOFF;
+ else
+ config |= THMC50_REG_CONF_nFANOFF;
+ i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
+
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+/* There is only one PWM mode = DC */
+static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "0\n");
+}
+
+/* Temperatures */
+static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct thmc50_data *data = thmc50_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
+}
+
+static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct thmc50_data *data = thmc50_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
+}
+
+static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct thmc50_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->update_lock);
+ data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
+ i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
+ data->temp_min[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct thmc50_data *data = thmc50_update_device(dev);
+ return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
+}
+
+static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct thmc50_data *data = i2c_get_clientdata(client);
+ int val = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->update_lock);
+ data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
+ i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
+ data->temp_max[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+#define temp_reg(offset) \
+static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
+ NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
+ show_temp_min, set_temp_min, offset - 1); \
+static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
+ show_temp_max, set_temp_max, offset - 1);
+
+temp_reg(1);
+temp_reg(2);
+temp_reg(3);
+
+static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
+ set_analog_out, 0);
+static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
+
+static struct attribute *thmc50_attributes[] = {
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_pwm1.dev_attr.attr,
+ &sensor_dev_attr_pwm1_mode.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group thmc50_group = {
+ .attrs = thmc50_attributes,
+};
+
+/* for ADM1022 3rd temperature mode */
+static struct attribute *adm1022_attributes[] = {
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_min.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group adm1022_group = {
+ .attrs = adm1022_attributes,
+};
+
+static int thmc50_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ unsigned company;
+ unsigned revision;
+ unsigned config;
+ struct i2c_client *client;
+ struct thmc50_data *data;
+ struct device *dev;
+ int err = 0;
+ const char *type_name = "";
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ pr_debug("thmc50: detect failed, "
+ "smbus byte data not supported!\n");
+ goto exit;
+ }
+
+ /* OK. For now, we presume we have a valid client. We now create the
+ client structure, even though we cannot fill it completely yet.
+ But it allows us to access thmc50 registers. */
+ if (!(data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL))) {
+ pr_debug("thmc50: detect failed, kzalloc failed!\n");
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ client = &data->client;
+ i2c_set_clientdata(client, data);
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &thmc50_driver;
+ dev = &client->dev;
+
+ pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
+ client->addr, i2c_adapter_id(client->adapter));
+
+ /* Now, we do the remaining detection. */
+ company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
+ revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
+ config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+
+ if (kind == 0)
+ kind = thmc50;
+ else if (kind < 0) {
+ err = -ENODEV;
+ if (revision >= 0xc0 && ((config & 0x10) == 0)) {
+ if (company == 0x49) {
+ kind = thmc50;
+ err = 0;
+ } else if (company == 0x41) {
+ kind = adm1022;
+ err = 0;
+ }
+ }
+ }
+ if (err == -ENODEV) {
+ pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
+ goto exit_free;
+ }
+ pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
+ type_name, (revision >> 4) - 0xc, revision & 0xf);
+ data->type = kind;
+
+ if (kind == thmc50)
+ type_name = "thmc50";
+ else if (kind == adm1022) {
+ int id = i2c_adapter_id(client->adapter);
+ int i;
+
+ type_name = "adm1022";
+ data->has_temp3 = (config >> 7) & 1; /* config MSB */
+ for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
+ if (adm1022_temp3[i] == id &&
+ adm1022_temp3[i + 1] == address) {
+ /* enable 2nd remote temp */
+ data->has_temp3 = 1;
+ break;
+ }
+ }
+
+ /* Fill in the remaining client fields & put it into the global list */
+ strlcpy(client->name, type_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;
+
+ thmc50_init_client(client);
+
+ /* Register sysfs hooks */
+ if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
+ goto exit_detach;
+
+ /* Register ADM1022 sysfs hooks */
+ if (data->type == adm1022)
+ if ((err = sysfs_create_group(&client->dev.kobj,
+ &adm1022_group)))
+ goto exit_remove_sysfs_thmc50;
+
+ /* Register a new directory entry with module sensors */
+ data->class_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->class_dev)) {
+ err = PTR_ERR(data->class_dev);
+ goto exit_remove_sysfs;
+ }
+
+ return 0;
+
+exit_remove_sysfs:
+ if (data->type == adm1022)
+ sysfs_remove_group(&client->dev.kobj, &adm1022_group);
+exit_remove_sysfs_thmc50:
+ sysfs_remove_group(&client->dev.kobj, &thmc50_group);
+exit_detach:
+ i2c_detach_client(client);
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int thmc50_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_probe(adapter, &addr_data, thmc50_detect);
+}
+
+static int thmc50_detach_client(struct i2c_client *client)
+{
+ struct thmc50_data *data = i2c_get_clientdata(client);
+ int err;
+
+ hwmon_device_unregister(data->class_dev);
+ sysfs_remove_group(&client->dev.kobj, &thmc50_group);
+ if (data->type == adm1022)
+ sysfs_remove_group(&client->dev.kobj, &adm1022_group);
+
+ if ((err = i2c_detach_client(client)))
+ return err;
+
+ kfree(data);
+
+ return 0;
+}
+
+static void thmc50_init_client(struct i2c_client *client)
+{
+ struct thmc50_data *data = i2c_get_clientdata(client);
+ int config;
+
+ data->analog_out = i2c_smbus_read_byte_data(client,
+ THMC50_REG_ANALOG_OUT);
+ /* set up to at least 1 */
+ if (data->analog_out == 0) {
+ data->analog_out = 1;
+ i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
+ data->analog_out);
+ }
+ config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+ config |= 0x1; /* start the chip if it is in standby mode */
+ if (data->has_temp3)
+ config |= 0x80; /* enable 2nd remote temp */
+ i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
+}
+
+static struct thmc50_data *thmc50_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct thmc50_data *data = i2c_get_clientdata(client);
+ int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + timeout)
+ || !data->valid) {
+
+ int temps = data->has_temp3 ? 3 : 2;
+ int i;
+ for (i = 0; i < temps; i++) {
+ data->temp_input[i] = i2c_smbus_read_byte_data(client,
+ THMC50_REG_TEMP[i]);
+ data->temp_max[i] = i2c_smbus_read_byte_data(client,
+ THMC50_REG_TEMP_MAX[i]);
+ data->temp_min[i] = i2c_smbus_read_byte_data(client,
+ THMC50_REG_TEMP_MIN[i]);
+ }
+ data->analog_out =
+ i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+static int __init sm_thmc50_init(void)
+{
+ return i2c_add_driver(&thmc50_driver);
+}
+
+static void __exit sm_thmc50_exit(void)
+{
+ i2c_del_driver(&thmc50_driver);
+}
+
+MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
+MODULE_DESCRIPTION("THMC50 driver");
+
+module_init(sm_thmc50_init);
+module_exit(sm_thmc50_exit);
projects / linux-2.6 / commitdiff