2 * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring
4 * Copyright (C) 2006 Corentin LABBE <corentin.labbe@geomatys.fr>
6 * Based on LM83 Driver by Jean Delvare <khali@linux-fr.org>
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 unsigned short normal_i2c[] = {
45 0x2e, 0x2f, I2C_CLIENT_END
52 I2C_CLIENT_INSMOD_1(adm1029);
55 * The ADM1029 registers
56 * Manufacturer ID is 0x41 for Analog Devices
59 #define ADM1029_REG_MAN_ID 0x0D
60 #define ADM1029_REG_CHIP_ID 0x0E
61 #define ADM1029_REG_CONFIG 0x01
62 #define ADM1029_REG_NB_FAN_SUPPORT 0x02
64 #define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06
66 #define ADM1029_REG_LOCAL_TEMP 0xA0
67 #define ADM1029_REG_REMOTE1_TEMP 0xA1
68 #define ADM1029_REG_REMOTE2_TEMP 0xA2
70 #define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
71 #define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
72 #define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92
74 #define ADM1029_REG_LOCAL_TEMP_LOW 0x98
75 #define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
76 #define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A
78 #define ADM1029_REG_FAN1 0x70
79 #define ADM1029_REG_FAN2 0x71
81 #define ADM1029_REG_FAN1_MIN 0x78
82 #define ADM1029_REG_FAN2_MIN 0x79
84 #define ADM1029_REG_FAN1_CONFIG 0x68
85 #define ADM1029_REG_FAN2_CONFIG 0x69
87 #define TEMP_FROM_REG(val) ((val) * 1000)
89 #define DIV_FROM_REG(val) ( 1 << (((val) >> 6) - 1))
91 /* Registers to be checked by adm1029_update_device() */
92 static const u8 ADM1029_REG_TEMP[] = {
93 ADM1029_REG_LOCAL_TEMP,
94 ADM1029_REG_REMOTE1_TEMP,
95 ADM1029_REG_REMOTE2_TEMP,
96 ADM1029_REG_LOCAL_TEMP_HIGH,
97 ADM1029_REG_REMOTE1_TEMP_HIGH,
98 ADM1029_REG_REMOTE2_TEMP_HIGH,
99 ADM1029_REG_LOCAL_TEMP_LOW,
100 ADM1029_REG_REMOTE1_TEMP_LOW,
101 ADM1029_REG_REMOTE2_TEMP_LOW,
104 static const u8 ADM1029_REG_FAN[] = {
107 ADM1029_REG_FAN1_MIN,
108 ADM1029_REG_FAN2_MIN,
111 static const u8 ADM1029_REG_FAN_DIV[] = {
112 ADM1029_REG_FAN1_CONFIG,
113 ADM1029_REG_FAN2_CONFIG,
117 * Functions declaration
120 static int adm1029_attach_adapter(struct i2c_adapter *adapter);
121 static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
122 static int adm1029_detach_client(struct i2c_client *client);
123 static struct adm1029_data *adm1029_update_device(struct device *dev);
124 static int adm1029_init_client(struct i2c_client *client);
127 * Driver data (common to all clients)
130 static struct i2c_driver adm1029_driver = {
134 .attach_adapter = adm1029_attach_adapter,
135 .detach_client = adm1029_detach_client,
139 * Client data (each client gets its own)
142 struct adm1029_data {
143 struct i2c_client client;
144 struct class_device *class_dev;
145 struct mutex update_lock;
146 char valid; /* zero until following fields are valid */
147 unsigned long last_updated; /* in jiffies */
149 /* registers values, signed for temperature, unsigned for other stuff */
150 s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
151 u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
152 u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
160 show_temp(struct device *dev, struct device_attribute *devattr, char *buf)
162 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
163 struct adm1029_data *data = adm1029_update_device(dev);
164 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
168 show_fan(struct device *dev, struct device_attribute *devattr, char *buf)
170 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
171 struct adm1029_data *data = adm1029_update_device(dev);
173 if (data->fan[attr->index] == 0 || data->fan_div[attr->index] == 0
174 || data->fan[attr->index] == 255) {
175 return sprintf(buf, "0\n");
178 val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
179 / data->fan[attr->index];
180 return sprintf(buf, "%d\n", val);
184 show_fan_div(struct device *dev, struct device_attribute *devattr, char *buf)
186 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
187 struct adm1029_data *data = adm1029_update_device(dev);
188 if (data->fan_div[attr->index] == 0)
189 return sprintf(buf, "0\n");
190 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
193 static ssize_t set_fan_div(struct device *dev,
194 struct device_attribute *devattr, const char *buf, size_t count)
196 struct i2c_client *client = to_i2c_client(dev);
197 struct adm1029_data *data = i2c_get_clientdata(client);
198 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
199 long val = simple_strtol(buf, NULL, 10);
202 mutex_lock(&data->update_lock);
204 /*Read actual config */
205 reg = i2c_smbus_read_byte_data(client,
206 ADM1029_REG_FAN_DIV[attr->index]);
219 mutex_unlock(&data->update_lock);
220 dev_err(&client->dev, "fan_div value %ld not "
221 "supported. Choose one of 1, 2 or 4!\n", val);
224 /* Update the value */
225 reg = (reg & 0x3F) | (val << 6);
228 i2c_smbus_write_byte_data(client,
229 ADM1029_REG_FAN_DIV[attr->index], reg);
230 mutex_unlock(&data->update_lock);
236 Access rights on sysfs, S_IRUGO stand for Is Readable by User, Group and Others
237 S_IWUSR stand for Is Writable by User
239 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
240 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
241 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
243 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3);
244 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4);
245 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5);
247 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6);
248 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7);
249 static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8);
251 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
252 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
254 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2);
255 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3);
257 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
258 show_fan_div, set_fan_div, 0);
259 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
260 show_fan_div, set_fan_div, 1);
262 static struct attribute *adm1029_attributes[] = {
263 &sensor_dev_attr_temp1_input.dev_attr.attr,
264 &sensor_dev_attr_temp1_min.dev_attr.attr,
265 &sensor_dev_attr_temp1_max.dev_attr.attr,
266 &sensor_dev_attr_temp2_input.dev_attr.attr,
267 &sensor_dev_attr_temp2_min.dev_attr.attr,
268 &sensor_dev_attr_temp2_max.dev_attr.attr,
269 &sensor_dev_attr_temp3_input.dev_attr.attr,
270 &sensor_dev_attr_temp3_min.dev_attr.attr,
271 &sensor_dev_attr_temp3_max.dev_attr.attr,
272 &sensor_dev_attr_fan1_input.dev_attr.attr,
273 &sensor_dev_attr_fan2_input.dev_attr.attr,
274 &sensor_dev_attr_fan1_min.dev_attr.attr,
275 &sensor_dev_attr_fan2_min.dev_attr.attr,
276 &sensor_dev_attr_fan1_div.dev_attr.attr,
277 &sensor_dev_attr_fan2_div.dev_attr.attr,
281 static const struct attribute_group adm1029_group = {
282 .attrs = adm1029_attributes,
289 static int adm1029_attach_adapter(struct i2c_adapter *adapter)
291 if (!(adapter->class & I2C_CLASS_HWMON))
293 return i2c_probe(adapter, &addr_data, adm1029_detect);
297 * The following function does more than just detection. If detection
298 * succeeds, it also registers the new chip.
301 static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
303 struct i2c_client *client;
304 struct adm1029_data *data;
306 const char *name = "";
307 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
310 if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
315 client = &data->client;
316 i2c_set_clientdata(client, data);
317 client->addr = address;
318 client->adapter = adapter;
319 client->driver = &adm1029_driver;
321 /* Now we do the detection and identification. A negative kind
322 * means that the driver was loaded with no force parameter
323 * (default), so we must both detect and identify the chip
324 * (actually there is only one possible kind of chip for now, adm1029).
325 * A zero kind means that the driver was loaded with the force
326 * parameter, the detection step shall be skipped. A positive kind
327 * means that the driver was loaded with the force parameter and a
328 * given kind of chip is requested, so both the detection and the
329 * identification steps are skipped. */
331 /* Default to an adm1029 if forced */
335 /* ADM1029 doesn't have CHIP ID, check just MAN ID
336 * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
337 * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
341 if (kind <= 0) { /* identification */
342 u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
344 man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
345 chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
346 temp_devices_installed = i2c_smbus_read_byte_data(client,
347 ADM1029_REG_TEMP_DEVICES_INSTALLED);
348 nb_fan_support = i2c_smbus_read_byte_data(client,
349 ADM1029_REG_NB_FAN_SUPPORT);
350 /* 0x41 is Analog Devices */
351 if (man_id == 0x41 && (temp_devices_installed & 0xf9) == 0x01
352 && nb_fan_support == 0x03) {
353 if ((chip_id & 0xF0) == 0x00) {
356 /* There are no "official" CHIP ID, so actually
357 * we use Major/Minor revision for that */
359 "adm1029: Unknown major revision %x, "
360 "please let us know\n", chip_id);
364 if (kind <= 0) { /* identification failed */
365 pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
366 "chip_id=0x%02X)\n", man_id, chip_id);
371 if (kind == adm1029) {
375 /* We can fill in the remaining client fields */
376 strlcpy(client->name, name, I2C_NAME_SIZE);
377 mutex_init(&data->update_lock);
379 /* Tell the I2C layer a new client has arrived */
380 if ((err = i2c_attach_client(client)))
384 * Initialize the ADM1029 chip
385 * Check config register
387 if (adm1029_init_client(client) == 0)
390 /* Register sysfs hooks */
391 if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
394 data->class_dev = hwmon_device_register(&client->dev);
395 if (IS_ERR(data->class_dev)) {
396 err = PTR_ERR(data->class_dev);
397 goto exit_remove_files;
403 sysfs_remove_group(&client->dev.kobj, &adm1029_group);
405 i2c_detach_client(client);
412 static int adm1029_init_client(struct i2c_client *client)
415 config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
416 if ((config & 0x10) == 0) {
417 i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
421 config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
422 if ((config & 0x10) == 0) {
423 dev_err(&client->dev, "Initialization failed!\n");
429 static int adm1029_detach_client(struct i2c_client *client)
431 struct adm1029_data *data = i2c_get_clientdata(client);
434 hwmon_device_unregister(data->class_dev);
435 sysfs_remove_group(&client->dev.kobj, &adm1029_group);
437 if ((err = i2c_detach_client(client)))
445 function that update the status of the chips (temperature for exemple)
447 static struct adm1029_data *adm1029_update_device(struct device *dev)
449 struct i2c_client *client = to_i2c_client(dev);
450 struct adm1029_data *data = i2c_get_clientdata(client);
452 mutex_lock(&data->update_lock);
454 * Use the "cache" Luke, don't recheck values
455 * if there are already checked not a long time later
457 if (time_after(jiffies, data->last_updated + HZ * 2)
461 dev_dbg(&client->dev, "Updating adm1029 data\n");
463 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
465 i2c_smbus_read_byte_data(client,
466 ADM1029_REG_TEMP[nr]);
468 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
470 i2c_smbus_read_byte_data(client,
471 ADM1029_REG_FAN[nr]);
473 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
475 i2c_smbus_read_byte_data(client,
476 ADM1029_REG_FAN_DIV[nr]);
479 data->last_updated = jiffies;
483 mutex_unlock(&data->update_lock);
491 static int __init sensors_adm1029_init(void)
494 return i2c_add_driver(&adm1029_driver);
497 static void __exit sensors_adm1029_exit(void)
500 i2c_del_driver(&adm1029_driver);
503 MODULE_AUTHOR("Corentin LABBE <corentin.labbe@geomatys.fr>");
504 MODULE_DESCRIPTION("adm1029 driver");
505 MODULE_LICENSE("GPL v2");
507 module_init(sensors_adm1029_init);
508 module_exit(sensors_adm1029_exit);