2 * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
4 * Copyright (C) 2006 Corentin LABBE <clabbe.montjoie@gmail.com>
6 * Based on LM83 Driver by Jean Delvare <jdelvare@suse.de>
8 * Give only processor, motherboard temperatures and fan tachs
9 * Very rare chip please let me know if you use it
11 * http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation version 2 of the License
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/jiffies.h>
32 #include <linux/i2c.h>
33 #include <linux/hwmon-sysfs.h>
34 #include <linux/hwmon.h>
35 #include <linux/err.h>
36 #include <linux/mutex.h>
42 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
43 0x2e, 0x2f, I2C_CLIENT_END
47 * The ADM1029 registers
48 * Manufacturer ID is 0x41 for Analog Devices
51 #define ADM1029_REG_MAN_ID 0x0D
52 #define ADM1029_REG_CHIP_ID 0x0E
53 #define ADM1029_REG_CONFIG 0x01
54 #define ADM1029_REG_NB_FAN_SUPPORT 0x02
56 #define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06
58 #define ADM1029_REG_LOCAL_TEMP 0xA0
59 #define ADM1029_REG_REMOTE1_TEMP 0xA1
60 #define ADM1029_REG_REMOTE2_TEMP 0xA2
62 #define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
63 #define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
64 #define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92
66 #define ADM1029_REG_LOCAL_TEMP_LOW 0x98
67 #define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
68 #define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A
70 #define ADM1029_REG_FAN1 0x70
71 #define ADM1029_REG_FAN2 0x71
73 #define ADM1029_REG_FAN1_MIN 0x78
74 #define ADM1029_REG_FAN2_MIN 0x79
76 #define ADM1029_REG_FAN1_CONFIG 0x68
77 #define ADM1029_REG_FAN2_CONFIG 0x69
79 #define TEMP_FROM_REG(val) ((val) * 1000)
81 #define DIV_FROM_REG(val) (1 << (((val) >> 6) - 1))
83 /* Registers to be checked by adm1029_update_device() */
84 static const u8 ADM1029_REG_TEMP[] = {
85 ADM1029_REG_LOCAL_TEMP,
86 ADM1029_REG_REMOTE1_TEMP,
87 ADM1029_REG_REMOTE2_TEMP,
88 ADM1029_REG_LOCAL_TEMP_HIGH,
89 ADM1029_REG_REMOTE1_TEMP_HIGH,
90 ADM1029_REG_REMOTE2_TEMP_HIGH,
91 ADM1029_REG_LOCAL_TEMP_LOW,
92 ADM1029_REG_REMOTE1_TEMP_LOW,
93 ADM1029_REG_REMOTE2_TEMP_LOW,
96 static const u8 ADM1029_REG_FAN[] = {
100 ADM1029_REG_FAN2_MIN,
103 static const u8 ADM1029_REG_FAN_DIV[] = {
104 ADM1029_REG_FAN1_CONFIG,
105 ADM1029_REG_FAN2_CONFIG,
109 * Client data (each client gets its own)
112 struct adm1029_data {
113 struct i2c_client *client;
114 struct mutex update_lock;
115 char valid; /* zero until following fields are valid */
116 unsigned long last_updated; /* in jiffies */
118 /* registers values, signed for temperature, unsigned for other stuff */
119 s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
120 u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
121 u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
125 * function that update the status of the chips (temperature for example)
127 static struct adm1029_data *adm1029_update_device(struct device *dev)
129 struct adm1029_data *data = dev_get_drvdata(dev);
130 struct i2c_client *client = data->client;
132 mutex_lock(&data->update_lock);
134 * Use the "cache" Luke, don't recheck values
135 * if there are already checked not a long time later
137 if (time_after(jiffies, data->last_updated + HZ * 2)
141 dev_dbg(&client->dev, "Updating adm1029 data\n");
143 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
145 i2c_smbus_read_byte_data(client,
146 ADM1029_REG_TEMP[nr]);
148 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
150 i2c_smbus_read_byte_data(client,
151 ADM1029_REG_FAN[nr]);
153 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
155 i2c_smbus_read_byte_data(client,
156 ADM1029_REG_FAN_DIV[nr]);
159 data->last_updated = jiffies;
163 mutex_unlock(&data->update_lock);
173 show_temp(struct device *dev, struct device_attribute *devattr, char *buf)
175 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
176 struct adm1029_data *data = adm1029_update_device(dev);
177 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
181 show_fan(struct device *dev, struct device_attribute *devattr, char *buf)
183 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
184 struct adm1029_data *data = adm1029_update_device(dev);
186 if (data->fan[attr->index] == 0
187 || (data->fan_div[attr->index] & 0xC0) == 0
188 || data->fan[attr->index] == 255) {
189 return sprintf(buf, "0\n");
192 val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
193 / data->fan[attr->index];
194 return sprintf(buf, "%d\n", val);
198 show_fan_div(struct device *dev, struct device_attribute *devattr, char *buf)
200 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
201 struct adm1029_data *data = adm1029_update_device(dev);
202 if ((data->fan_div[attr->index] & 0xC0) == 0)
203 return sprintf(buf, "0\n");
204 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
207 static ssize_t set_fan_div(struct device *dev,
208 struct device_attribute *devattr, const char *buf, size_t count)
210 struct adm1029_data *data = dev_get_drvdata(dev);
211 struct i2c_client *client = data->client;
212 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
215 int ret = kstrtol(buf, 10, &val);
219 mutex_lock(&data->update_lock);
221 /*Read actual config */
222 reg = i2c_smbus_read_byte_data(client,
223 ADM1029_REG_FAN_DIV[attr->index]);
236 mutex_unlock(&data->update_lock);
237 dev_err(&client->dev,
238 "fan_div value %ld not supported. Choose one of 1, 2 or 4!\n",
242 /* Update the value */
243 reg = (reg & 0x3F) | (val << 6);
245 /* Update the cache */
246 data->fan_div[attr->index] = reg;
249 i2c_smbus_write_byte_data(client,
250 ADM1029_REG_FAN_DIV[attr->index], reg);
251 mutex_unlock(&data->update_lock);
257 * Access rights on sysfs. S_IRUGO: Is Readable by User, Group and Others
258 * S_IWUSR: Is Writable by User.
260 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
261 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
262 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
264 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3);
265 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4);
266 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5);
268 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6);
269 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7);
270 static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8);
272 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
273 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
275 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2);
276 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3);
278 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
279 show_fan_div, set_fan_div, 0);
280 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
281 show_fan_div, set_fan_div, 1);
283 static struct attribute *adm1029_attrs[] = {
284 &sensor_dev_attr_temp1_input.dev_attr.attr,
285 &sensor_dev_attr_temp1_min.dev_attr.attr,
286 &sensor_dev_attr_temp1_max.dev_attr.attr,
287 &sensor_dev_attr_temp2_input.dev_attr.attr,
288 &sensor_dev_attr_temp2_min.dev_attr.attr,
289 &sensor_dev_attr_temp2_max.dev_attr.attr,
290 &sensor_dev_attr_temp3_input.dev_attr.attr,
291 &sensor_dev_attr_temp3_min.dev_attr.attr,
292 &sensor_dev_attr_temp3_max.dev_attr.attr,
293 &sensor_dev_attr_fan1_input.dev_attr.attr,
294 &sensor_dev_attr_fan2_input.dev_attr.attr,
295 &sensor_dev_attr_fan1_min.dev_attr.attr,
296 &sensor_dev_attr_fan2_min.dev_attr.attr,
297 &sensor_dev_attr_fan1_div.dev_attr.attr,
298 &sensor_dev_attr_fan2_div.dev_attr.attr,
302 ATTRIBUTE_GROUPS(adm1029);
308 /* Return 0 if detection is successful, -ENODEV otherwise */
309 static int adm1029_detect(struct i2c_client *client,
310 struct i2c_board_info *info)
312 struct i2c_adapter *adapter = client->adapter;
313 u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
315 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
319 * ADM1029 doesn't have CHIP ID, check just MAN ID
320 * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
321 * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
325 man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
326 chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
327 temp_devices_installed = i2c_smbus_read_byte_data(client,
328 ADM1029_REG_TEMP_DEVICES_INSTALLED);
329 nb_fan_support = i2c_smbus_read_byte_data(client,
330 ADM1029_REG_NB_FAN_SUPPORT);
331 /* 0x41 is Analog Devices */
332 if (man_id != 0x41 || (temp_devices_installed & 0xf9) != 0x01
333 || nb_fan_support != 0x03)
336 if ((chip_id & 0xF0) != 0x00) {
338 * There are no "official" CHIP ID, so actually
339 * we use Major/Minor revision for that
341 pr_info("Unknown major revision %x, please let us know\n",
346 strlcpy(info->type, "adm1029", I2C_NAME_SIZE);
351 static int adm1029_init_client(struct i2c_client *client)
355 config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
356 if ((config & 0x10) == 0) {
357 i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
361 config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
362 if ((config & 0x10) == 0) {
363 dev_err(&client->dev, "Initialization failed!\n");
369 static int adm1029_probe(struct i2c_client *client,
370 const struct i2c_device_id *id)
372 struct device *dev = &client->dev;
373 struct adm1029_data *data;
374 struct device *hwmon_dev;
376 data = devm_kzalloc(dev, sizeof(struct adm1029_data), GFP_KERNEL);
380 data->client = client;
381 mutex_init(&data->update_lock);
384 * Initialize the ADM1029 chip
385 * Check config register
387 if (adm1029_init_client(client) == 0)
390 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
393 return PTR_ERR_OR_ZERO(hwmon_dev);
396 static const struct i2c_device_id adm1029_id[] = {
400 MODULE_DEVICE_TABLE(i2c, adm1029_id);
402 static struct i2c_driver adm1029_driver = {
403 .class = I2C_CLASS_HWMON,
407 .probe = adm1029_probe,
408 .id_table = adm1029_id,
409 .detect = adm1029_detect,
410 .address_list = normal_i2c,
413 module_i2c_driver(adm1029_driver);
415 MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>");
416 MODULE_DESCRIPTION("adm1029 driver");
417 MODULE_LICENSE("GPL v2");