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1 | /* |
2 | * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring |
3 | * |
4 | * Copyright (C) 2006 Corentin LABBE <corentin.labbe@geomatys.fr> |
5 | * |
6 | * Based on LM83 Driver by Jean Delvare <khali@linux-fr.org> |
7 | * |
8 | * Give only processor, motherboard temperatures and fan tachs |
9 | * Very rare chip please let me know if you use it |
10 | * |
11 | * http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf |
12 | * |
13 | * |
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 |
17 | * |
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. |
22 | * |
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. |
26 | */ |
27 | |
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> |
37 | |
38 | /* |
39 | * Addresses to scan |
40 | */ |
41 | |
42 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
43 | 0x2e, 0x2f, I2C_CLIENT_END |
44 | }; |
45 | |
46 | /* |
47 | * The ADM1029 registers |
48 | * Manufacturer ID is 0x41 for Analog Devices |
49 | */ |
50 | |
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 |
55 | |
56 | #define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06 |
57 | |
58 | #define ADM1029_REG_LOCAL_TEMP 0xA0 |
59 | #define ADM1029_REG_REMOTE1_TEMP 0xA1 |
60 | #define ADM1029_REG_REMOTE2_TEMP 0xA2 |
61 | |
62 | #define ADM1029_REG_LOCAL_TEMP_HIGH 0x90 |
63 | #define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91 |
64 | #define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92 |
65 | |
66 | #define ADM1029_REG_LOCAL_TEMP_LOW 0x98 |
67 | #define ADM1029_REG_REMOTE1_TEMP_LOW 0x99 |
68 | #define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A |
69 | |
70 | #define ADM1029_REG_FAN1 0x70 |
71 | #define ADM1029_REG_FAN2 0x71 |
72 | |
73 | #define ADM1029_REG_FAN1_MIN 0x78 |
74 | #define ADM1029_REG_FAN2_MIN 0x79 |
75 | |
76 | #define ADM1029_REG_FAN1_CONFIG 0x68 |
77 | #define ADM1029_REG_FAN2_CONFIG 0x69 |
78 | |
79 | #define TEMP_FROM_REG(val) ((val) * 1000) |
80 | |
81 | #define DIV_FROM_REG(val) (1 << (((val) >> 6) - 1)) |
82 | |
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, |
94 | }; |
95 | |
96 | static const u8 ADM1029_REG_FAN[] = { |
97 | ADM1029_REG_FAN1, |
98 | ADM1029_REG_FAN2, |
99 | ADM1029_REG_FAN1_MIN, |
100 | ADM1029_REG_FAN2_MIN, |
101 | }; |
102 | |
103 | static const u8 ADM1029_REG_FAN_DIV[] = { |
104 | ADM1029_REG_FAN1_CONFIG, |
105 | ADM1029_REG_FAN2_CONFIG, |
106 | }; |
107 | |
108 | /* |
109 | * Functions declaration |
110 | */ |
111 | |
112 | static int adm1029_probe(struct i2c_client *client, |
113 | const struct i2c_device_id *id); |
114 | static int adm1029_detect(struct i2c_client *client, |
115 | struct i2c_board_info *info); |
116 | static int adm1029_remove(struct i2c_client *client); |
117 | static struct adm1029_data *adm1029_update_device(struct device *dev); |
118 | static int adm1029_init_client(struct i2c_client *client); |
119 | |
120 | /* |
121 | * Driver data (common to all clients) |
122 | */ |
123 | |
124 | static const struct i2c_device_id adm1029_id[] = { |
125 | { "adm1029", 0 }, |
126 | { } |
127 | }; |
128 | MODULE_DEVICE_TABLE(i2c, adm1029_id); |
129 | |
130 | static struct i2c_driver adm1029_driver = { |
131 | .class = I2C_CLASS_HWMON, |
132 | .driver = { |
133 | .name = "adm1029", |
134 | }, |
135 | .probe = adm1029_probe, |
136 | .remove = adm1029_remove, |
137 | .id_table = adm1029_id, |
138 | .detect = adm1029_detect, |
139 | .address_list = normal_i2c, |
140 | }; |
141 | |
142 | /* |
143 | * Client data (each client gets its own) |
144 | */ |
145 | |
146 | struct adm1029_data { |
147 | struct device *hwmon_dev; |
148 | struct mutex update_lock; |
149 | char valid; /* zero until following fields are valid */ |
150 | unsigned long last_updated; /* in jiffies */ |
151 | |
152 | /* registers values, signed for temperature, unsigned for other stuff */ |
153 | s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)]; |
154 | u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)]; |
155 | u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)]; |
156 | }; |
157 | |
158 | /* |
159 | * Sysfs stuff |
160 | */ |
161 | |
162 | static ssize_t |
163 | show_temp(struct device *dev, struct device_attribute *devattr, char *buf) |
164 | { |
165 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
166 | struct adm1029_data *data = adm1029_update_device(dev); |
167 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index])); |
168 | } |
169 | |
170 | static ssize_t |
171 | show_fan(struct device *dev, struct device_attribute *devattr, char *buf) |
172 | { |
173 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
174 | struct adm1029_data *data = adm1029_update_device(dev); |
175 | u16 val; |
176 | if (data->fan[attr->index] == 0 |
177 | || (data->fan_div[attr->index] & 0xC0) == 0 |
178 | || data->fan[attr->index] == 255) { |
179 | return sprintf(buf, "0\n"); |
180 | } |
181 | |
182 | val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index]) |
183 | / data->fan[attr->index]; |
184 | return sprintf(buf, "%d\n", val); |
185 | } |
186 | |
187 | static ssize_t |
188 | show_fan_div(struct device *dev, struct device_attribute *devattr, char *buf) |
189 | { |
190 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
191 | struct adm1029_data *data = adm1029_update_device(dev); |
192 | if ((data->fan_div[attr->index] & 0xC0) == 0) |
193 | return sprintf(buf, "0\n"); |
194 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); |
195 | } |
196 | |
197 | static ssize_t set_fan_div(struct device *dev, |
198 | struct device_attribute *devattr, const char *buf, size_t count) |
199 | { |
200 | struct i2c_client *client = to_i2c_client(dev); |
201 | struct adm1029_data *data = i2c_get_clientdata(client); |
202 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
203 | u8 reg; |
204 | long val; |
205 | int ret = kstrtol(buf, 10, &val); |
206 | if (ret < 0) |
207 | return ret; |
208 | |
209 | mutex_lock(&data->update_lock); |
210 | |
211 | /*Read actual config */ |
212 | reg = i2c_smbus_read_byte_data(client, |
213 | ADM1029_REG_FAN_DIV[attr->index]); |
214 | |
215 | switch (val) { |
216 | case 1: |
217 | val = 1; |
218 | break; |
219 | case 2: |
220 | val = 2; |
221 | break; |
222 | case 4: |
223 | val = 3; |
224 | break; |
225 | default: |
226 | mutex_unlock(&data->update_lock); |
227 | dev_err(&client->dev, "fan_div value %ld not " |
228 | "supported. Choose one of 1, 2 or 4!\n", val); |
229 | return -EINVAL; |
230 | } |
231 | /* Update the value */ |
232 | reg = (reg & 0x3F) | (val << 6); |
233 | |
234 | /* Write value */ |
235 | i2c_smbus_write_byte_data(client, |
236 | ADM1029_REG_FAN_DIV[attr->index], reg); |
237 | mutex_unlock(&data->update_lock); |
238 | |
239 | return count; |
240 | } |
241 | |
242 | /* |
243 | * Access rights on sysfs. S_IRUGO: Is Readable by User, Group and Others |
244 | * S_IWUSR: Is Writable by User. |
245 | */ |
246 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
247 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); |
248 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); |
249 | |
250 | static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL, 3); |
251 | static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp, NULL, 4); |
252 | static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp, NULL, 5); |
253 | |
254 | static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, NULL, 6); |
255 | static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO, show_temp, NULL, 7); |
256 | static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO, show_temp, NULL, 8); |
257 | |
258 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
259 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); |
260 | |
261 | static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan, NULL, 2); |
262 | static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan, NULL, 3); |
263 | |
264 | static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, |
265 | show_fan_div, set_fan_div, 0); |
266 | static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, |
267 | show_fan_div, set_fan_div, 1); |
268 | |
269 | static struct attribute *adm1029_attributes[] = { |
270 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
271 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
272 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
273 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
274 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
275 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
276 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
277 | &sensor_dev_attr_temp3_min.dev_attr.attr, |
278 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
279 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
280 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
281 | &sensor_dev_attr_fan1_min.dev_attr.attr, |
282 | &sensor_dev_attr_fan2_min.dev_attr.attr, |
283 | &sensor_dev_attr_fan1_div.dev_attr.attr, |
284 | &sensor_dev_attr_fan2_div.dev_attr.attr, |
285 | NULL |
286 | }; |
287 | |
288 | static const struct attribute_group adm1029_group = { |
289 | .attrs = adm1029_attributes, |
290 | }; |
291 | |
292 | /* |
293 | * Real code |
294 | */ |
295 | |
296 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
297 | static int adm1029_detect(struct i2c_client *client, |
298 | struct i2c_board_info *info) |
299 | { |
300 | struct i2c_adapter *adapter = client->adapter; |
301 | u8 man_id, chip_id, temp_devices_installed, nb_fan_support; |
302 | |
303 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
304 | return -ENODEV; |
305 | |
306 | /* |
307 | * ADM1029 doesn't have CHIP ID, check just MAN ID |
308 | * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED, |
309 | * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values |
310 | * documented |
311 | */ |
312 | |
313 | man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID); |
314 | chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID); |
315 | temp_devices_installed = i2c_smbus_read_byte_data(client, |
316 | ADM1029_REG_TEMP_DEVICES_INSTALLED); |
317 | nb_fan_support = i2c_smbus_read_byte_data(client, |
318 | ADM1029_REG_NB_FAN_SUPPORT); |
319 | /* 0x41 is Analog Devices */ |
320 | if (man_id != 0x41 || (temp_devices_installed & 0xf9) != 0x01 |
321 | || nb_fan_support != 0x03) |
322 | return -ENODEV; |
323 | |
324 | if ((chip_id & 0xF0) != 0x00) { |
325 | /* |
326 | * There are no "official" CHIP ID, so actually |
327 | * we use Major/Minor revision for that |
328 | */ |
329 | pr_info("adm1029: Unknown major revision %x, " |
330 | "please let us know\n", chip_id); |
331 | return -ENODEV; |
332 | } |
333 | |
334 | strlcpy(info->type, "adm1029", I2C_NAME_SIZE); |
335 | |
336 | return 0; |
337 | } |
338 | |
339 | static int adm1029_probe(struct i2c_client *client, |
340 | const struct i2c_device_id *id) |
341 | { |
342 | struct adm1029_data *data; |
343 | int err; |
344 | |
345 | data = devm_kzalloc(&client->dev, sizeof(struct adm1029_data), |
346 | GFP_KERNEL); |
347 | if (!data) |
348 | return -ENOMEM; |
349 | |
350 | i2c_set_clientdata(client, data); |
351 | mutex_init(&data->update_lock); |
352 | |
353 | /* |
354 | * Initialize the ADM1029 chip |
355 | * Check config register |
356 | */ |
357 | if (adm1029_init_client(client) == 0) |
358 | return -ENODEV; |
359 | |
360 | /* Register sysfs hooks */ |
361 | err = sysfs_create_group(&client->dev.kobj, &adm1029_group); |
362 | if (err) |
363 | return err; |
364 | |
365 | data->hwmon_dev = hwmon_device_register(&client->dev); |
366 | if (IS_ERR(data->hwmon_dev)) { |
367 | err = PTR_ERR(data->hwmon_dev); |
368 | goto exit_remove_files; |
369 | } |
370 | |
371 | return 0; |
372 | |
373 | exit_remove_files: |
374 | sysfs_remove_group(&client->dev.kobj, &adm1029_group); |
375 | return err; |
376 | } |
377 | |
378 | static int adm1029_init_client(struct i2c_client *client) |
379 | { |
380 | u8 config; |
381 | config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG); |
382 | if ((config & 0x10) == 0) { |
383 | i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG, |
384 | config | 0x10); |
385 | } |
386 | /* recheck config */ |
387 | config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG); |
388 | if ((config & 0x10) == 0) { |
389 | dev_err(&client->dev, "Initialization failed!\n"); |
390 | return 0; |
391 | } |
392 | return 1; |
393 | } |
394 | |
395 | static int adm1029_remove(struct i2c_client *client) |
396 | { |
397 | struct adm1029_data *data = i2c_get_clientdata(client); |
398 | |
399 | hwmon_device_unregister(data->hwmon_dev); |
400 | sysfs_remove_group(&client->dev.kobj, &adm1029_group); |
401 | |
402 | return 0; |
403 | } |
404 | |
405 | /* |
406 | * function that update the status of the chips (temperature for example) |
407 | */ |
408 | static struct adm1029_data *adm1029_update_device(struct device *dev) |
409 | { |
410 | struct i2c_client *client = to_i2c_client(dev); |
411 | struct adm1029_data *data = i2c_get_clientdata(client); |
412 | |
413 | mutex_lock(&data->update_lock); |
414 | /* |
415 | * Use the "cache" Luke, don't recheck values |
416 | * if there are already checked not a long time later |
417 | */ |
418 | if (time_after(jiffies, data->last_updated + HZ * 2) |
419 | || !data->valid) { |
420 | int nr; |
421 | |
422 | dev_dbg(&client->dev, "Updating adm1029 data\n"); |
423 | |
424 | for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) { |
425 | data->temp[nr] = |
426 | i2c_smbus_read_byte_data(client, |
427 | ADM1029_REG_TEMP[nr]); |
428 | } |
429 | for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) { |
430 | data->fan[nr] = |
431 | i2c_smbus_read_byte_data(client, |
432 | ADM1029_REG_FAN[nr]); |
433 | } |
434 | for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) { |
435 | data->fan_div[nr] = |
436 | i2c_smbus_read_byte_data(client, |
437 | ADM1029_REG_FAN_DIV[nr]); |
438 | } |
439 | |
440 | data->last_updated = jiffies; |
441 | data->valid = 1; |
442 | } |
443 | |
444 | mutex_unlock(&data->update_lock); |
445 | |
446 | return data; |
447 | } |
448 | |
449 | module_i2c_driver(adm1029_driver); |
450 | |
451 | MODULE_AUTHOR("Corentin LABBE <corentin.labbe@geomatys.fr>"); |
452 | MODULE_DESCRIPTION("adm1029 driver"); |
453 | MODULE_LICENSE("GPL v2"); |
454 |
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