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 const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
43 0x2e, 0x2f, I2C_CLIENT_END
50 I2C_CLIENT_INSMOD_1(adm1029);
53 * The ADM1029 registers
54 * Manufacturer ID is 0x41 for Analog Devices
57 #define ADM1029_REG_MAN_ID 0x0D
58 #define ADM1029_REG_CHIP_ID 0x0E
59 #define ADM1029_REG_CONFIG 0x01
60 #define ADM1029_REG_NB_FAN_SUPPORT 0x02
62 #define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06
64 #define ADM1029_REG_LOCAL_TEMP 0xA0
65 #define ADM1029_REG_REMOTE1_TEMP 0xA1
66 #define ADM1029_REG_REMOTE2_TEMP 0xA2
68 #define ADM1029_REG_LOCAL_TEMP_HIGH 0x90
69 #define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91
70 #define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92
72 #define ADM1029_REG_LOCAL_TEMP_LOW 0x98
73 #define ADM1029_REG_REMOTE1_TEMP_LOW 0x99
74 #define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A
76 #define ADM1029_REG_FAN1 0x70
77 #define ADM1029_REG_FAN2 0x71
79 #define ADM1029_REG_FAN1_MIN 0x78
80 #define ADM1029_REG_FAN2_MIN 0x79
82 #define ADM1029_REG_FAN1_CONFIG 0x68
83 #define ADM1029_REG_FAN2_CONFIG 0x69
85 #define TEMP_FROM_REG(val) ((val) * 1000)
87 #define DIV_FROM_REG(val) ( 1 << (((val) >> 6) - 1))
89 /* Registers to be checked by adm1029_update_device() */
90 static const u8 ADM1029_REG_TEMP[] = {
91 ADM1029_REG_LOCAL_TEMP,
92 ADM1029_REG_REMOTE1_TEMP,
93 ADM1029_REG_REMOTE2_TEMP,
94 ADM1029_REG_LOCAL_TEMP_HIGH,
95 ADM1029_REG_REMOTE1_TEMP_HIGH,
96 ADM1029_REG_REMOTE2_TEMP_HIGH,
97 ADM1029_REG_LOCAL_TEMP_LOW,
98 ADM1029_REG_REMOTE1_TEMP_LOW,
99 ADM1029_REG_REMOTE2_TEMP_LOW,
102 static const u8 ADM1029_REG_FAN[] = {
105 ADM1029_REG_FAN1_MIN,
106 ADM1029_REG_FAN2_MIN,
109 static const u8 ADM1029_REG_FAN_DIV[] = {
110 ADM1029_REG_FAN1_CONFIG,
111 ADM1029_REG_FAN2_CONFIG,
115 * Functions declaration
118 static int adm1029_attach_adapter(struct i2c_adapter *adapter);
119 static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind);
120 static int adm1029_detach_client(struct i2c_client *client);
121 static struct adm1029_data *adm1029_update_device(struct device *dev);
122 static int adm1029_init_client(struct i2c_client *client);
125 * Driver data (common to all clients)
128 static struct i2c_driver adm1029_driver = {
132 .attach_adapter = adm1029_attach_adapter,
133 .detach_client = adm1029_detach_client,
137 * Client data (each client gets its own)
140 struct adm1029_data {
141 struct i2c_client client;
142 struct device *hwmon_dev;
143 struct mutex update_lock;
144 char valid; /* zero until following fields are valid */
145 unsigned long last_updated; /* in jiffies */
147 /* registers values, signed for temperature, unsigned for other stuff */
148 s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)];
149 u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)];
150 u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)];
158 show_temp(struct device *dev, struct device_attribute *devattr, char *buf)
160 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
161 struct adm1029_data *data = adm1029_update_device(dev);
162 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
166 show_fan(struct device *dev, struct device_attribute *devattr, char *buf)
168 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
169 struct adm1029_data *data = adm1029_update_device(dev);
171 if (data->fan[attr->index] == 0 || data->fan_div[attr->index] == 0
172 || data->fan[attr->index] == 255) {
173 return sprintf(buf, "0\n");
176 val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index])
177 / data->fan[attr->index];
178 return sprintf(buf, "%d\n", val);
182 show_fan_div(struct device *dev, struct device_attribute *devattr, char *buf)
184 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
185 struct adm1029_data *data = adm1029_update_device(dev);
186 if (data->fan_div[attr->index] == 0)
187 return sprintf(buf, "0\n");
188 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
191 static ssize_t set_fan_div(struct device *dev,
192 struct device_attribute *devattr, const char *buf, size_t count)
194 struct i2c_client *client = to_i2c_client(dev);
195 struct adm1029_data *data = i2c_get_clientdata(client);
196 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
197 long val = simple_strtol(buf, NULL, 10);
200 mutex_lock(&data->update_lock);
202 /*Read actual config */
203 reg = i2c_smbus_read_byte_data(client,
204 ADM1029_REG_FAN_DIV[attr->index]);
217 mutex_unlock(&data->update_lock);
218 dev_err(&client->dev, "fan_div value %ld not "
219 "supported. Choose one of 1, 2 or 4!\n", val);
222 /* Update the value */
223 reg = (reg & 0x3F) | (val << 6);
226 i2c_smbus_write_byte_data(client,
227 ADM1029_REG_FAN_DIV[attr->index], reg);
228 mutex_unlock(&data->update_lock);
234 Access rights on sysfs, S_IRUGO stand for Is Readable by User, Group and Others
235 S_IWUSR stand for Is Writable by User
237 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
238 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
239 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
241 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3);
242 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4);
243 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5);
245 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6);
246 static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7);
247 static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8);
249 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
250 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
252 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2);
253 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3);
255 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
256 show_fan_div, set_fan_div, 0);
257 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
258 show_fan_div, set_fan_div, 1);
260 static struct attribute *adm1029_attributes[] = {
261 &sensor_dev_attr_temp1_input.dev_attr.attr,
262 &sensor_dev_attr_temp1_min.dev_attr.attr,
263 &sensor_dev_attr_temp1_max.dev_attr.attr,
264 &sensor_dev_attr_temp2_input.dev_attr.attr,
265 &sensor_dev_attr_temp2_min.dev_attr.attr,
266 &sensor_dev_attr_temp2_max.dev_attr.attr,
267 &sensor_dev_attr_temp3_input.dev_attr.attr,
268 &sensor_dev_attr_temp3_min.dev_attr.attr,
269 &sensor_dev_attr_temp3_max.dev_attr.attr,
270 &sensor_dev_attr_fan1_input.dev_attr.attr,
271 &sensor_dev_attr_fan2_input.dev_attr.attr,
272 &sensor_dev_attr_fan1_min.dev_attr.attr,
273 &sensor_dev_attr_fan2_min.dev_attr.attr,
274 &sensor_dev_attr_fan1_div.dev_attr.attr,
275 &sensor_dev_attr_fan2_div.dev_attr.attr,
279 static const struct attribute_group adm1029_group = {
280 .attrs = adm1029_attributes,
287 static int adm1029_attach_adapter(struct i2c_adapter *adapter)
289 if (!(adapter->class & I2C_CLASS_HWMON))
291 return i2c_probe(adapter, &addr_data, adm1029_detect);
295 * The following function does more than just detection. If detection
296 * succeeds, it also registers the new chip.
299 static int adm1029_detect(struct i2c_adapter *adapter, int address, int kind)
301 struct i2c_client *client;
302 struct adm1029_data *data;
304 const char *name = "";
305 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
308 if (!(data = kzalloc(sizeof(struct adm1029_data), GFP_KERNEL))) {
313 client = &data->client;
314 i2c_set_clientdata(client, data);
315 client->addr = address;
316 client->adapter = adapter;
317 client->driver = &adm1029_driver;
319 /* Now we do the detection and identification. A negative kind
320 * means that the driver was loaded with no force parameter
321 * (default), so we must both detect and identify the chip
322 * (actually there is only one possible kind of chip for now, adm1029).
323 * A zero kind means that the driver was loaded with the force
324 * parameter, the detection step shall be skipped. A positive kind
325 * means that the driver was loaded with the force parameter and a
326 * given kind of chip is requested, so both the detection and the
327 * identification steps are skipped. */
329 /* Default to an adm1029 if forced */
333 /* ADM1029 doesn't have CHIP ID, check just MAN ID
334 * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED,
335 * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values
339 if (kind <= 0) { /* identification */
340 u8 man_id, chip_id, temp_devices_installed, nb_fan_support;
342 man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID);
343 chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID);
344 temp_devices_installed = i2c_smbus_read_byte_data(client,
345 ADM1029_REG_TEMP_DEVICES_INSTALLED);
346 nb_fan_support = i2c_smbus_read_byte_data(client,
347 ADM1029_REG_NB_FAN_SUPPORT);
348 /* 0x41 is Analog Devices */
349 if (man_id == 0x41 && (temp_devices_installed & 0xf9) == 0x01
350 && nb_fan_support == 0x03) {
351 if ((chip_id & 0xF0) == 0x00) {
354 /* There are no "official" CHIP ID, so actually
355 * we use Major/Minor revision for that */
357 "adm1029: Unknown major revision %x, "
358 "please let us know\n", chip_id);
362 if (kind <= 0) { /* identification failed */
363 pr_debug("adm1029: Unsupported chip (man_id=0x%02X, "
364 "chip_id=0x%02X)\n", man_id, chip_id);
369 if (kind == adm1029) {
373 /* We can fill in the remaining client fields */
374 strlcpy(client->name, name, I2C_NAME_SIZE);
375 mutex_init(&data->update_lock);
377 /* Tell the I2C layer a new client has arrived */
378 if ((err = i2c_attach_client(client)))
382 * Initialize the ADM1029 chip
383 * Check config register
385 if (adm1029_init_client(client) == 0)
388 /* Register sysfs hooks */
389 if ((err = sysfs_create_group(&client->dev.kobj, &adm1029_group)))
392 data->hwmon_dev = hwmon_device_register(&client->dev);
393 if (IS_ERR(data->hwmon_dev)) {
394 err = PTR_ERR(data->hwmon_dev);
395 goto exit_remove_files;
401 sysfs_remove_group(&client->dev.kobj, &adm1029_group);
403 i2c_detach_client(client);
410 static int adm1029_init_client(struct i2c_client *client)
413 config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
414 if ((config & 0x10) == 0) {
415 i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG,
419 config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG);
420 if ((config & 0x10) == 0) {
421 dev_err(&client->dev, "Initialization failed!\n");
427 static int adm1029_detach_client(struct i2c_client *client)
429 struct adm1029_data *data = i2c_get_clientdata(client);
432 hwmon_device_unregister(data->hwmon_dev);
433 sysfs_remove_group(&client->dev.kobj, &adm1029_group);
435 if ((err = i2c_detach_client(client)))
443 function that update the status of the chips (temperature for exemple)
445 static struct adm1029_data *adm1029_update_device(struct device *dev)
447 struct i2c_client *client = to_i2c_client(dev);
448 struct adm1029_data *data = i2c_get_clientdata(client);
450 mutex_lock(&data->update_lock);
452 * Use the "cache" Luke, don't recheck values
453 * if there are already checked not a long time later
455 if (time_after(jiffies, data->last_updated + HZ * 2)
459 dev_dbg(&client->dev, "Updating adm1029 data\n");
461 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) {
463 i2c_smbus_read_byte_data(client,
464 ADM1029_REG_TEMP[nr]);
466 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) {
468 i2c_smbus_read_byte_data(client,
469 ADM1029_REG_FAN[nr]);
471 for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) {
473 i2c_smbus_read_byte_data(client,
474 ADM1029_REG_FAN_DIV[nr]);
477 data->last_updated = jiffies;
481 mutex_unlock(&data->update_lock);
489 static int __init sensors_adm1029_init(void)
492 return i2c_add_driver(&adm1029_driver);
495 static void __exit sensors_adm1029_exit(void)
498 i2c_del_driver(&adm1029_driver);
501 MODULE_AUTHOR("Corentin LABBE <corentin.labbe@geomatys.fr>");
502 MODULE_DESCRIPTION("adm1029 driver");
503 MODULE_LICENSE("GPL v2");
505 module_init(sensors_adm1029_init);
506 module_exit(sensors_adm1029_exit);