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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
add77c64 | 2 | /* |
4d387df7 GR |
3 | * thmc50.c - Part of lm_sensors, Linux kernel modules for hardware |
4 | * monitoring | |
5 | * Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl> | |
6 | * Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and | |
7 | * Philip Edelbrock <phil@netroedge.com> | |
4d387df7 | 8 | */ |
add77c64 KH |
9 | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/hwmon.h> | |
15 | #include <linux/hwmon-sysfs.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/mutex.h> | |
dcd8f392 | 18 | #include <linux/jiffies.h> |
add77c64 KH |
19 | |
20 | MODULE_LICENSE("GPL"); | |
21 | ||
22 | /* Addresses to scan */ | |
25e9c86d | 23 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
add77c64 KH |
24 | |
25 | /* Insmod parameters */ | |
e5e9f44c | 26 | enum chips { thmc50, adm1022 }; |
f95f0b4c JD |
27 | |
28 | static unsigned short adm1022_temp3[16]; | |
29 | static unsigned int adm1022_temp3_num; | |
30 | module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0); | |
b55f3757 GR |
31 | MODULE_PARM_DESC(adm1022_temp3, |
32 | "List of adapter,address pairs to enable 3rd temperature (ADM1022 only)"); | |
add77c64 KH |
33 | |
34 | /* Many THMC50 constants specified below */ | |
35 | ||
36 | /* The THMC50 registers */ | |
37 | #define THMC50_REG_CONF 0x40 | |
38 | #define THMC50_REG_COMPANY_ID 0x3E | |
39 | #define THMC50_REG_DIE_CODE 0x3F | |
40 | #define THMC50_REG_ANALOG_OUT 0x19 | |
dcf3b5fb | 41 | /* |
bba891c2 KH |
42 | * The mirror status register cannot be used as |
43 | * reading it does not clear alarms. | |
dcf3b5fb | 44 | */ |
bba891c2 | 45 | #define THMC50_REG_INTR 0x41 |
add77c64 | 46 | |
5910a9b2 TK |
47 | static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 }; |
48 | static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C }; | |
49 | static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B }; | |
84f768c1 KH |
50 | static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 }; |
51 | static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 }; | |
add77c64 KH |
52 | |
53 | #define THMC50_REG_CONF_nFANOFF 0x20 | |
84f768c1 | 54 | #define THMC50_REG_CONF_PROGRAMMED 0x08 |
add77c64 KH |
55 | |
56 | /* Each client has this additional data */ | |
57 | struct thmc50_data { | |
86fd260e AL |
58 | struct i2c_client *client; |
59 | const struct attribute_group *groups[3]; | |
add77c64 KH |
60 | |
61 | struct mutex update_lock; | |
62 | enum chips type; | |
63 | unsigned long last_updated; /* In jiffies */ | |
64 | char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */ | |
952a11ca | 65 | bool valid; /* true if following fields are valid */ |
add77c64 KH |
66 | |
67 | /* Register values */ | |
68 | s8 temp_input[3]; | |
69 | s8 temp_max[3]; | |
70 | s8 temp_min[3]; | |
84f768c1 | 71 | s8 temp_critical[3]; |
add77c64 | 72 | u8 analog_out; |
dcf3b5fb | 73 | u8 alarms; |
add77c64 KH |
74 | }; |
75 | ||
9b38a66e AL |
76 | static struct thmc50_data *thmc50_update_device(struct device *dev) |
77 | { | |
86fd260e AL |
78 | struct thmc50_data *data = dev_get_drvdata(dev); |
79 | struct i2c_client *client = data->client; | |
9b38a66e | 80 | int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0); |
add77c64 | 81 | |
9b38a66e | 82 | mutex_lock(&data->update_lock); |
ccf37488 | 83 | |
9b38a66e AL |
84 | if (time_after(jiffies, data->last_updated + timeout) |
85 | || !data->valid) { | |
86 | ||
87 | int temps = data->has_temp3 ? 3 : 2; | |
88 | int i; | |
89 | int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
90 | ||
91 | prog &= THMC50_REG_CONF_PROGRAMMED; | |
92 | ||
93 | for (i = 0; i < temps; i++) { | |
94 | data->temp_input[i] = i2c_smbus_read_byte_data(client, | |
95 | THMC50_REG_TEMP[i]); | |
96 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
97 | THMC50_REG_TEMP_MAX[i]); | |
98 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
99 | THMC50_REG_TEMP_MIN[i]); | |
100 | data->temp_critical[i] = | |
101 | i2c_smbus_read_byte_data(client, | |
102 | prog ? THMC50_REG_TEMP_CRITICAL[i] | |
103 | : THMC50_REG_TEMP_DEFAULT[i]); | |
104 | } | |
105 | data->analog_out = | |
106 | i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT); | |
107 | data->alarms = | |
108 | i2c_smbus_read_byte_data(client, THMC50_REG_INTR); | |
109 | data->last_updated = jiffies; | |
952a11ca | 110 | data->valid = true; |
9b38a66e AL |
111 | } |
112 | ||
113 | mutex_unlock(&data->update_lock); | |
114 | ||
115 | return data; | |
116 | } | |
add77c64 | 117 | |
29168f30 | 118 | static ssize_t analog_out_show(struct device *dev, |
add77c64 KH |
119 | struct device_attribute *attr, char *buf) |
120 | { | |
121 | struct thmc50_data *data = thmc50_update_device(dev); | |
122 | return sprintf(buf, "%d\n", data->analog_out); | |
123 | } | |
124 | ||
29168f30 GR |
125 | static ssize_t analog_out_store(struct device *dev, |
126 | struct device_attribute *attr, | |
127 | const char *buf, size_t count) | |
add77c64 | 128 | { |
86fd260e AL |
129 | struct thmc50_data *data = dev_get_drvdata(dev); |
130 | struct i2c_client *client = data->client; | |
add77c64 | 131 | int config; |
4d387df7 GR |
132 | unsigned long tmp; |
133 | int err; | |
134 | ||
135 | err = kstrtoul(buf, 10, &tmp); | |
136 | if (err) | |
137 | return err; | |
add77c64 KH |
138 | |
139 | mutex_lock(&data->update_lock); | |
2a844c14 | 140 | data->analog_out = clamp_val(tmp, 0, 255); |
add77c64 KH |
141 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, |
142 | data->analog_out); | |
143 | ||
144 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
145 | if (data->analog_out == 0) | |
146 | config &= ~THMC50_REG_CONF_nFANOFF; | |
147 | else | |
148 | config |= THMC50_REG_CONF_nFANOFF; | |
149 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); | |
150 | ||
151 | mutex_unlock(&data->update_lock); | |
152 | return count; | |
153 | } | |
154 | ||
155 | /* There is only one PWM mode = DC */ | |
29168f30 GR |
156 | static ssize_t pwm_mode_show(struct device *dev, |
157 | struct device_attribute *attr, char *buf) | |
add77c64 KH |
158 | { |
159 | return sprintf(buf, "0\n"); | |
160 | } | |
161 | ||
162 | /* Temperatures */ | |
29168f30 | 163 | static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
add77c64 KH |
164 | char *buf) |
165 | { | |
166 | int nr = to_sensor_dev_attr(attr)->index; | |
167 | struct thmc50_data *data = thmc50_update_device(dev); | |
168 | return sprintf(buf, "%d\n", data->temp_input[nr] * 1000); | |
169 | } | |
170 | ||
29168f30 GR |
171 | static ssize_t temp_min_show(struct device *dev, |
172 | struct device_attribute *attr, char *buf) | |
add77c64 KH |
173 | { |
174 | int nr = to_sensor_dev_attr(attr)->index; | |
175 | struct thmc50_data *data = thmc50_update_device(dev); | |
176 | return sprintf(buf, "%d\n", data->temp_min[nr] * 1000); | |
177 | } | |
178 | ||
29168f30 GR |
179 | static ssize_t temp_min_store(struct device *dev, |
180 | struct device_attribute *attr, const char *buf, | |
181 | size_t count) | |
add77c64 KH |
182 | { |
183 | int nr = to_sensor_dev_attr(attr)->index; | |
86fd260e AL |
184 | struct thmc50_data *data = dev_get_drvdata(dev); |
185 | struct i2c_client *client = data->client; | |
4d387df7 GR |
186 | long val; |
187 | int err; | |
188 | ||
189 | err = kstrtol(buf, 10, &val); | |
190 | if (err) | |
191 | return err; | |
add77c64 KH |
192 | |
193 | mutex_lock(&data->update_lock); | |
2a844c14 | 194 | data->temp_min[nr] = clamp_val(val / 1000, -128, 127); |
add77c64 KH |
195 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr], |
196 | data->temp_min[nr]); | |
197 | mutex_unlock(&data->update_lock); | |
198 | return count; | |
199 | } | |
200 | ||
29168f30 GR |
201 | static ssize_t temp_max_show(struct device *dev, |
202 | struct device_attribute *attr, char *buf) | |
add77c64 KH |
203 | { |
204 | int nr = to_sensor_dev_attr(attr)->index; | |
205 | struct thmc50_data *data = thmc50_update_device(dev); | |
206 | return sprintf(buf, "%d\n", data->temp_max[nr] * 1000); | |
207 | } | |
208 | ||
29168f30 GR |
209 | static ssize_t temp_max_store(struct device *dev, |
210 | struct device_attribute *attr, const char *buf, | |
211 | size_t count) | |
add77c64 KH |
212 | { |
213 | int nr = to_sensor_dev_attr(attr)->index; | |
86fd260e AL |
214 | struct thmc50_data *data = dev_get_drvdata(dev); |
215 | struct i2c_client *client = data->client; | |
4d387df7 GR |
216 | long val; |
217 | int err; | |
218 | ||
219 | err = kstrtol(buf, 10, &val); | |
220 | if (err) | |
221 | return err; | |
add77c64 KH |
222 | |
223 | mutex_lock(&data->update_lock); | |
2a844c14 | 224 | data->temp_max[nr] = clamp_val(val / 1000, -128, 127); |
add77c64 KH |
225 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr], |
226 | data->temp_max[nr]); | |
227 | mutex_unlock(&data->update_lock); | |
228 | return count; | |
229 | } | |
230 | ||
29168f30 GR |
231 | static ssize_t temp_critical_show(struct device *dev, |
232 | struct device_attribute *attr, char *buf) | |
84f768c1 KH |
233 | { |
234 | int nr = to_sensor_dev_attr(attr)->index; | |
235 | struct thmc50_data *data = thmc50_update_device(dev); | |
236 | return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000); | |
237 | } | |
238 | ||
29168f30 | 239 | static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
dcf3b5fb KH |
240 | char *buf) |
241 | { | |
242 | int index = to_sensor_dev_attr(attr)->index; | |
243 | struct thmc50_data *data = thmc50_update_device(dev); | |
244 | ||
245 | return sprintf(buf, "%u\n", (data->alarms >> index) & 1); | |
246 | } | |
247 | ||
29168f30 GR |
248 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
249 | static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); | |
250 | static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); | |
251 | static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_critical, 0); | |
252 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); | |
253 | static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); | |
254 | static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); | |
255 | static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_critical, 1); | |
256 | static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); | |
257 | static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); | |
258 | static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); | |
259 | static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_critical, 2); | |
260 | ||
261 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0); | |
262 | static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5); | |
263 | static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 1); | |
264 | static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 7); | |
265 | static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2); | |
266 | ||
267 | static SENSOR_DEVICE_ATTR_RW(pwm1, analog_out, 0); | |
268 | static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0); | |
add77c64 KH |
269 | |
270 | static struct attribute *thmc50_attributes[] = { | |
271 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
272 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
273 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
84f768c1 | 274 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
dcf3b5fb | 275 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
add77c64 KH |
276 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
277 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
278 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
84f768c1 | 279 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
dcf3b5fb KH |
280 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
281 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
add77c64 KH |
282 | &sensor_dev_attr_pwm1.dev_attr.attr, |
283 | &sensor_dev_attr_pwm1_mode.dev_attr.attr, | |
284 | NULL | |
285 | }; | |
286 | ||
287 | static const struct attribute_group thmc50_group = { | |
288 | .attrs = thmc50_attributes, | |
289 | }; | |
290 | ||
291 | /* for ADM1022 3rd temperature mode */ | |
894c00cf | 292 | static struct attribute *temp3_attributes[] = { |
add77c64 KH |
293 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
294 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
295 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
84f768c1 | 296 | &sensor_dev_attr_temp3_crit.dev_attr.attr, |
dcf3b5fb KH |
297 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
298 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
add77c64 KH |
299 | NULL |
300 | }; | |
301 | ||
894c00cf JD |
302 | static const struct attribute_group temp3_group = { |
303 | .attrs = temp3_attributes, | |
add77c64 KH |
304 | }; |
305 | ||
ccf37488 | 306 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 307 | static int thmc50_detect(struct i2c_client *client, |
ccf37488 | 308 | struct i2c_board_info *info) |
add77c64 KH |
309 | { |
310 | unsigned company; | |
311 | unsigned revision; | |
312 | unsigned config; | |
ccf37488 | 313 | struct i2c_adapter *adapter = client->adapter; |
cc28a610 | 314 | const char *type_name; |
add77c64 KH |
315 | |
316 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
b55f3757 | 317 | pr_debug("thmc50: detect failed, smbus byte data not supported!\n"); |
ccf37488 | 318 | return -ENODEV; |
add77c64 KH |
319 | } |
320 | ||
add77c64 KH |
321 | pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n", |
322 | client->addr, i2c_adapter_id(client->adapter)); | |
323 | ||
add77c64 KH |
324 | company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID); |
325 | revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE); | |
326 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
52df6440 JD |
327 | if (revision < 0xc0 || (config & 0x10)) |
328 | return -ENODEV; | |
add77c64 | 329 | |
52df6440 | 330 | if (company == 0x41) { |
add77c64 KH |
331 | int id = i2c_adapter_id(client->adapter); |
332 | int i; | |
333 | ||
334 | type_name = "adm1022"; | |
add77c64 KH |
335 | for (i = 0; i + 1 < adm1022_temp3_num; i += 2) |
336 | if (adm1022_temp3[i] == id && | |
ccf37488 | 337 | adm1022_temp3[i + 1] == client->addr) { |
add77c64 | 338 | /* enable 2nd remote temp */ |
ccf37488 JD |
339 | config |= (1 << 7); |
340 | i2c_smbus_write_byte_data(client, | |
341 | THMC50_REG_CONF, | |
342 | config); | |
add77c64 KH |
343 | break; |
344 | } | |
52df6440 | 345 | } else if (company == 0x49) { |
cc28a610 | 346 | type_name = "thmc50"; |
52df6440 JD |
347 | } else { |
348 | pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n"); | |
349 | return -ENODEV; | |
add77c64 | 350 | } |
52df6440 | 351 | |
cc28a610 JD |
352 | pr_debug("thmc50: Detected %s (version %x, revision %x)\n", |
353 | type_name, (revision >> 4) - 0xc, revision & 0xf); | |
add77c64 | 354 | |
f2f394db | 355 | strscpy(info->type, type_name, I2C_NAME_SIZE); |
add77c64 | 356 | |
ccf37488 JD |
357 | return 0; |
358 | } | |
359 | ||
86fd260e | 360 | static void thmc50_init_client(struct thmc50_data *data) |
9b38a66e | 361 | { |
86fd260e | 362 | struct i2c_client *client = data->client; |
9b38a66e AL |
363 | int config; |
364 | ||
365 | data->analog_out = i2c_smbus_read_byte_data(client, | |
366 | THMC50_REG_ANALOG_OUT); | |
367 | /* set up to at least 1 */ | |
368 | if (data->analog_out == 0) { | |
369 | data->analog_out = 1; | |
370 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, | |
371 | data->analog_out); | |
372 | } | |
373 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
374 | config |= 0x1; /* start the chip if it is in standby mode */ | |
375 | if (data->type == adm1022 && (config & (1 << 7))) | |
376 | data->has_temp3 = 1; | |
377 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); | |
378 | } | |
379 | ||
67487038 SK |
380 | static const struct i2c_device_id thmc50_id[]; |
381 | ||
382 | static int thmc50_probe(struct i2c_client *client) | |
ccf37488 | 383 | { |
86fd260e | 384 | struct device *dev = &client->dev; |
ccf37488 | 385 | struct thmc50_data *data; |
86fd260e AL |
386 | struct device *hwmon_dev; |
387 | int idx = 0; | |
ccf37488 | 388 | |
86fd260e | 389 | data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL); |
bd91d3ba GR |
390 | if (!data) |
391 | return -ENOMEM; | |
ccf37488 | 392 | |
86fd260e | 393 | data->client = client; |
67487038 | 394 | data->type = i2c_match_id(thmc50_id, client)->driver_data; |
ccf37488 | 395 | mutex_init(&data->update_lock); |
add77c64 | 396 | |
86fd260e | 397 | thmc50_init_client(data); |
add77c64 | 398 | |
86fd260e AL |
399 | /* sysfs hooks */ |
400 | data->groups[idx++] = &thmc50_group; | |
add77c64 | 401 | |
86fd260e | 402 | /* Register additional ADM1022 sysfs hooks */ |
894c00cf | 403 | if (data->has_temp3) |
86fd260e | 404 | data->groups[idx++] = &temp3_group; |
add77c64 | 405 | |
86fd260e AL |
406 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
407 | data, data->groups); | |
408 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
add77c64 KH |
409 | } |
410 | ||
9b38a66e AL |
411 | static const struct i2c_device_id thmc50_id[] = { |
412 | { "adm1022", adm1022 }, | |
413 | { "thmc50", thmc50 }, | |
414 | { } | |
415 | }; | |
416 | MODULE_DEVICE_TABLE(i2c, thmc50_id); | |
add77c64 | 417 | |
9b38a66e AL |
418 | static struct i2c_driver thmc50_driver = { |
419 | .class = I2C_CLASS_HWMON, | |
420 | .driver = { | |
421 | .name = "thmc50", | |
422 | }, | |
1975d167 | 423 | .probe = thmc50_probe, |
9b38a66e AL |
424 | .id_table = thmc50_id, |
425 | .detect = thmc50_detect, | |
426 | .address_list = normal_i2c, | |
427 | }; | |
add77c64 | 428 | |
f0967eea | 429 | module_i2c_driver(thmc50_driver); |
add77c64 KH |
430 | |
431 | MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>"); | |
432 | MODULE_DESCRIPTION("THMC50 driver"); |