Commit | Line | Data |
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4b4fb254 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cae2caae CL |
2 | /* |
3 | * adm1029.c - Part of lm_sensors, Linux kernel modules for hardware monitoring | |
4 | * | |
962a75a2 | 5 | * Copyright (C) 2006 Corentin LABBE <clabbe.montjoie@gmail.com> |
cae2caae | 6 | * |
7c81c60f | 7 | * Based on LM83 Driver by Jean Delvare <jdelvare@suse.de> |
cae2caae CL |
8 | * |
9 | * Give only processor, motherboard temperatures and fan tachs | |
10 | * Very rare chip please let me know if you use it | |
11 | * | |
12 | * http://www.analog.com/UploadedFiles/Data_Sheets/ADM1029.pdf | |
cae2caae CL |
13 | */ |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/jiffies.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/hwmon-sysfs.h> | |
21 | #include <linux/hwmon.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/mutex.h> | |
24 | ||
25 | /* | |
26 | * Addresses to scan | |
27 | */ | |
28 | ||
25e9c86d MH |
29 | static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, |
30 | 0x2e, 0x2f, I2C_CLIENT_END | |
cae2caae CL |
31 | }; |
32 | ||
cae2caae CL |
33 | /* |
34 | * The ADM1029 registers | |
35 | * Manufacturer ID is 0x41 for Analog Devices | |
36 | */ | |
37 | ||
38 | #define ADM1029_REG_MAN_ID 0x0D | |
39 | #define ADM1029_REG_CHIP_ID 0x0E | |
40 | #define ADM1029_REG_CONFIG 0x01 | |
41 | #define ADM1029_REG_NB_FAN_SUPPORT 0x02 | |
42 | ||
43 | #define ADM1029_REG_TEMP_DEVICES_INSTALLED 0x06 | |
44 | ||
45 | #define ADM1029_REG_LOCAL_TEMP 0xA0 | |
46 | #define ADM1029_REG_REMOTE1_TEMP 0xA1 | |
47 | #define ADM1029_REG_REMOTE2_TEMP 0xA2 | |
48 | ||
49 | #define ADM1029_REG_LOCAL_TEMP_HIGH 0x90 | |
50 | #define ADM1029_REG_REMOTE1_TEMP_HIGH 0x91 | |
51 | #define ADM1029_REG_REMOTE2_TEMP_HIGH 0x92 | |
52 | ||
53 | #define ADM1029_REG_LOCAL_TEMP_LOW 0x98 | |
54 | #define ADM1029_REG_REMOTE1_TEMP_LOW 0x99 | |
55 | #define ADM1029_REG_REMOTE2_TEMP_LOW 0x9A | |
56 | ||
57 | #define ADM1029_REG_FAN1 0x70 | |
58 | #define ADM1029_REG_FAN2 0x71 | |
59 | ||
60 | #define ADM1029_REG_FAN1_MIN 0x78 | |
61 | #define ADM1029_REG_FAN2_MIN 0x79 | |
62 | ||
63 | #define ADM1029_REG_FAN1_CONFIG 0x68 | |
64 | #define ADM1029_REG_FAN2_CONFIG 0x69 | |
65 | ||
66 | #define TEMP_FROM_REG(val) ((val) * 1000) | |
67 | ||
08f50907 | 68 | #define DIV_FROM_REG(val) (1 << (((val) >> 6) - 1)) |
cae2caae CL |
69 | |
70 | /* Registers to be checked by adm1029_update_device() */ | |
71 | static const u8 ADM1029_REG_TEMP[] = { | |
72 | ADM1029_REG_LOCAL_TEMP, | |
73 | ADM1029_REG_REMOTE1_TEMP, | |
74 | ADM1029_REG_REMOTE2_TEMP, | |
75 | ADM1029_REG_LOCAL_TEMP_HIGH, | |
76 | ADM1029_REG_REMOTE1_TEMP_HIGH, | |
77 | ADM1029_REG_REMOTE2_TEMP_HIGH, | |
78 | ADM1029_REG_LOCAL_TEMP_LOW, | |
79 | ADM1029_REG_REMOTE1_TEMP_LOW, | |
80 | ADM1029_REG_REMOTE2_TEMP_LOW, | |
81 | }; | |
82 | ||
83 | static const u8 ADM1029_REG_FAN[] = { | |
84 | ADM1029_REG_FAN1, | |
85 | ADM1029_REG_FAN2, | |
86 | ADM1029_REG_FAN1_MIN, | |
87 | ADM1029_REG_FAN2_MIN, | |
88 | }; | |
89 | ||
90 | static const u8 ADM1029_REG_FAN_DIV[] = { | |
91 | ADM1029_REG_FAN1_CONFIG, | |
92 | ADM1029_REG_FAN2_CONFIG, | |
93 | }; | |
94 | ||
cae2caae CL |
95 | /* |
96 | * Client data (each client gets its own) | |
97 | */ | |
98 | ||
99 | struct adm1029_data { | |
4fd5233f | 100 | struct i2c_client *client; |
8241f885 | 101 | struct mutex update_lock; /* protect register access */ |
cae2caae CL |
102 | char valid; /* zero until following fields are valid */ |
103 | unsigned long last_updated; /* in jiffies */ | |
104 | ||
105 | /* registers values, signed for temperature, unsigned for other stuff */ | |
106 | s8 temp[ARRAY_SIZE(ADM1029_REG_TEMP)]; | |
107 | u8 fan[ARRAY_SIZE(ADM1029_REG_FAN)]; | |
108 | u8 fan_div[ARRAY_SIZE(ADM1029_REG_FAN_DIV)]; | |
109 | }; | |
110 | ||
b12e484e AL |
111 | /* |
112 | * function that update the status of the chips (temperature for example) | |
113 | */ | |
114 | static struct adm1029_data *adm1029_update_device(struct device *dev) | |
115 | { | |
4fd5233f AL |
116 | struct adm1029_data *data = dev_get_drvdata(dev); |
117 | struct i2c_client *client = data->client; | |
b12e484e AL |
118 | |
119 | mutex_lock(&data->update_lock); | |
120 | /* | |
121 | * Use the "cache" Luke, don't recheck values | |
122 | * if there are already checked not a long time later | |
123 | */ | |
d6450e85 | 124 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { |
b12e484e AL |
125 | int nr; |
126 | ||
127 | dev_dbg(&client->dev, "Updating adm1029 data\n"); | |
128 | ||
129 | for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_TEMP); nr++) { | |
130 | data->temp[nr] = | |
131 | i2c_smbus_read_byte_data(client, | |
132 | ADM1029_REG_TEMP[nr]); | |
133 | } | |
134 | for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN); nr++) { | |
135 | data->fan[nr] = | |
136 | i2c_smbus_read_byte_data(client, | |
137 | ADM1029_REG_FAN[nr]); | |
138 | } | |
139 | for (nr = 0; nr < ARRAY_SIZE(ADM1029_REG_FAN_DIV); nr++) { | |
140 | data->fan_div[nr] = | |
141 | i2c_smbus_read_byte_data(client, | |
142 | ADM1029_REG_FAN_DIV[nr]); | |
143 | } | |
144 | ||
145 | data->last_updated = jiffies; | |
146 | data->valid = 1; | |
147 | } | |
148 | ||
149 | mutex_unlock(&data->update_lock); | |
150 | ||
151 | return data; | |
152 | } | |
153 | ||
cae2caae CL |
154 | /* |
155 | * Sysfs stuff | |
156 | */ | |
157 | ||
158 | static ssize_t | |
19f7b176 | 159 | temp_show(struct device *dev, struct device_attribute *devattr, char *buf) |
cae2caae CL |
160 | { |
161 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
162 | struct adm1029_data *data = adm1029_update_device(dev); | |
66b331ca | 163 | |
cae2caae CL |
164 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index])); |
165 | } | |
166 | ||
167 | static ssize_t | |
19f7b176 | 168 | fan_show(struct device *dev, struct device_attribute *devattr, char *buf) |
cae2caae CL |
169 | { |
170 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
171 | struct adm1029_data *data = adm1029_update_device(dev); | |
172 | u16 val; | |
66b331ca | 173 | |
d6450e85 CL |
174 | if (data->fan[attr->index] == 0 || |
175 | (data->fan_div[attr->index] & 0xC0) == 0 || | |
176 | data->fan[attr->index] == 255) { | |
cae2caae CL |
177 | return sprintf(buf, "0\n"); |
178 | } | |
179 | ||
180 | val = 1880 * 120 / DIV_FROM_REG(data->fan_div[attr->index]) | |
181 | / data->fan[attr->index]; | |
182 | return sprintf(buf, "%d\n", val); | |
183 | } | |
184 | ||
185 | static ssize_t | |
19f7b176 | 186 | fan_div_show(struct device *dev, struct device_attribute *devattr, char *buf) |
cae2caae CL |
187 | { |
188 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
189 | struct adm1029_data *data = adm1029_update_device(dev); | |
66b331ca | 190 | |
366716e6 | 191 | if ((data->fan_div[attr->index] & 0xC0) == 0) |
cae2caae CL |
192 | return sprintf(buf, "0\n"); |
193 | return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index])); | |
194 | } | |
195 | ||
19f7b176 GR |
196 | static ssize_t fan_div_store(struct device *dev, |
197 | struct device_attribute *devattr, | |
198 | const char *buf, size_t count) | |
cae2caae | 199 | { |
4fd5233f AL |
200 | struct adm1029_data *data = dev_get_drvdata(dev); |
201 | struct i2c_client *client = data->client; | |
cae2caae | 202 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
cae2caae | 203 | u8 reg; |
08f50907 FM |
204 | long val; |
205 | int ret = kstrtol(buf, 10, &val); | |
66b331ca | 206 | |
08f50907 FM |
207 | if (ret < 0) |
208 | return ret; | |
cae2caae CL |
209 | |
210 | mutex_lock(&data->update_lock); | |
211 | ||
212 | /*Read actual config */ | |
213 | reg = i2c_smbus_read_byte_data(client, | |
214 | ADM1029_REG_FAN_DIV[attr->index]); | |
215 | ||
216 | switch (val) { | |
217 | case 1: | |
218 | val = 1; | |
219 | break; | |
220 | case 2: | |
221 | val = 2; | |
222 | break; | |
223 | case 4: | |
224 | val = 3; | |
225 | break; | |
226 | default: | |
227 | mutex_unlock(&data->update_lock); | |
b55f3757 GR |
228 | dev_err(&client->dev, |
229 | "fan_div value %ld not supported. Choose one of 1, 2 or 4!\n", | |
230 | val); | |
cae2caae CL |
231 | return -EINVAL; |
232 | } | |
233 | /* Update the value */ | |
234 | reg = (reg & 0x3F) | (val << 6); | |
235 | ||
1035a9e3 AL |
236 | /* Update the cache */ |
237 | data->fan_div[attr->index] = reg; | |
238 | ||
cae2caae CL |
239 | /* Write value */ |
240 | i2c_smbus_write_byte_data(client, | |
241 | ADM1029_REG_FAN_DIV[attr->index], reg); | |
242 | mutex_unlock(&data->update_lock); | |
243 | ||
244 | return count; | |
245 | } | |
246 | ||
b6c6d0cf | 247 | /* Access rights on sysfs. */ |
19f7b176 GR |
248 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
249 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); | |
250 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); | |
cae2caae | 251 | |
19f7b176 GR |
252 | static SENSOR_DEVICE_ATTR_RO(temp1_max, temp, 3); |
253 | static SENSOR_DEVICE_ATTR_RO(temp2_max, temp, 4); | |
254 | static SENSOR_DEVICE_ATTR_RO(temp3_max, temp, 5); | |
cae2caae | 255 | |
19f7b176 GR |
256 | static SENSOR_DEVICE_ATTR_RO(temp1_min, temp, 6); |
257 | static SENSOR_DEVICE_ATTR_RO(temp2_min, temp, 7); | |
258 | static SENSOR_DEVICE_ATTR_RO(temp3_min, temp, 8); | |
cae2caae | 259 | |
19f7b176 GR |
260 | static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); |
261 | static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); | |
cae2caae | 262 | |
19f7b176 GR |
263 | static SENSOR_DEVICE_ATTR_RO(fan1_min, fan, 2); |
264 | static SENSOR_DEVICE_ATTR_RO(fan2_min, fan, 3); | |
cae2caae | 265 | |
19f7b176 GR |
266 | static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0); |
267 | static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1); | |
cae2caae | 268 | |
4fd5233f | 269 | static struct attribute *adm1029_attrs[] = { |
cae2caae CL |
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 | ||
4fd5233f | 288 | ATTRIBUTE_GROUPS(adm1029); |
cae2caae CL |
289 | |
290 | /* | |
291 | * Real code | |
292 | */ | |
293 | ||
9c97fb4d | 294 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 295 | static int adm1029_detect(struct i2c_client *client, |
9c97fb4d | 296 | struct i2c_board_info *info) |
cae2caae | 297 | { |
9c97fb4d | 298 | struct i2c_adapter *adapter = client->adapter; |
52df6440 | 299 | u8 man_id, chip_id, temp_devices_installed, nb_fan_support; |
cae2caae | 300 | |
cae2caae | 301 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
9c97fb4d | 302 | return -ENODEV; |
cae2caae | 303 | |
94b991d4 GR |
304 | /* |
305 | * ADM1029 doesn't have CHIP ID, check just MAN ID | |
cae2caae CL |
306 | * For better detection we check also ADM1029_TEMP_DEVICES_INSTALLED, |
307 | * ADM1029_REG_NB_FAN_SUPPORT and compare it with possible values | |
308 | * documented | |
309 | */ | |
310 | ||
52df6440 JD |
311 | man_id = i2c_smbus_read_byte_data(client, ADM1029_REG_MAN_ID); |
312 | chip_id = i2c_smbus_read_byte_data(client, ADM1029_REG_CHIP_ID); | |
313 | temp_devices_installed = i2c_smbus_read_byte_data(client, | |
cae2caae | 314 | ADM1029_REG_TEMP_DEVICES_INSTALLED); |
52df6440 | 315 | nb_fan_support = i2c_smbus_read_byte_data(client, |
a15ad193 | 316 | ADM1029_REG_NB_FAN_SUPPORT); |
52df6440 | 317 | /* 0x41 is Analog Devices */ |
d6450e85 CL |
318 | if (man_id != 0x41 || (temp_devices_installed & 0xf9) != 0x01 || |
319 | nb_fan_support != 0x03) | |
52df6440 JD |
320 | return -ENODEV; |
321 | ||
322 | if ((chip_id & 0xF0) != 0x00) { | |
94b991d4 GR |
323 | /* |
324 | * There are no "official" CHIP ID, so actually | |
325 | * we use Major/Minor revision for that | |
326 | */ | |
b55f3757 GR |
327 | pr_info("Unknown major revision %x, please let us know\n", |
328 | chip_id); | |
52df6440 | 329 | return -ENODEV; |
cae2caae | 330 | } |
52df6440 | 331 | |
9c97fb4d | 332 | strlcpy(info->type, "adm1029", I2C_NAME_SIZE); |
cae2caae | 333 | |
9c97fb4d JD |
334 | return 0; |
335 | } | |
336 | ||
b12e484e AL |
337 | static int adm1029_init_client(struct i2c_client *client) |
338 | { | |
339 | u8 config; | |
340 | ||
341 | config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG); | |
342 | if ((config & 0x10) == 0) { | |
343 | i2c_smbus_write_byte_data(client, ADM1029_REG_CONFIG, | |
344 | config | 0x10); | |
345 | } | |
346 | /* recheck config */ | |
347 | config = i2c_smbus_read_byte_data(client, ADM1029_REG_CONFIG); | |
348 | if ((config & 0x10) == 0) { | |
349 | dev_err(&client->dev, "Initialization failed!\n"); | |
350 | return 0; | |
351 | } | |
352 | return 1; | |
353 | } | |
354 | ||
9c97fb4d JD |
355 | static int adm1029_probe(struct i2c_client *client, |
356 | const struct i2c_device_id *id) | |
357 | { | |
4fd5233f | 358 | struct device *dev = &client->dev; |
9c97fb4d | 359 | struct adm1029_data *data; |
4fd5233f | 360 | struct device *hwmon_dev; |
9c97fb4d | 361 | |
4fd5233f | 362 | data = devm_kzalloc(dev, sizeof(struct adm1029_data), GFP_KERNEL); |
08940b8a GR |
363 | if (!data) |
364 | return -ENOMEM; | |
cae2caae | 365 | |
4fd5233f | 366 | data->client = client; |
cae2caae CL |
367 | mutex_init(&data->update_lock); |
368 | ||
cae2caae CL |
369 | /* |
370 | * Initialize the ADM1029 chip | |
371 | * Check config register | |
372 | */ | |
08940b8a GR |
373 | if (adm1029_init_client(client) == 0) |
374 | return -ENODEV; | |
cae2caae | 375 | |
4fd5233f AL |
376 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
377 | data, | |
378 | adm1029_groups); | |
379 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
cae2caae CL |
380 | } |
381 | ||
b12e484e AL |
382 | static const struct i2c_device_id adm1029_id[] = { |
383 | { "adm1029", 0 }, | |
384 | { } | |
385 | }; | |
386 | MODULE_DEVICE_TABLE(i2c, adm1029_id); | |
cae2caae | 387 | |
b12e484e AL |
388 | static struct i2c_driver adm1029_driver = { |
389 | .class = I2C_CLASS_HWMON, | |
390 | .driver = { | |
391 | .name = "adm1029", | |
392 | }, | |
393 | .probe = adm1029_probe, | |
b12e484e AL |
394 | .id_table = adm1029_id, |
395 | .detect = adm1029_detect, | |
396 | .address_list = normal_i2c, | |
397 | }; | |
cae2caae | 398 | |
f0967eea | 399 | module_i2c_driver(adm1029_driver); |
cae2caae | 400 | |
962a75a2 | 401 | MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>"); |
cae2caae CL |
402 | MODULE_DESCRIPTION("adm1029 driver"); |
403 | MODULE_LICENSE("GPL v2"); |