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548820e2 DP |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * HWMON driver for ASUS motherboards that provides sensor readouts via WMI | |
4 | * interface present in the UEFI of the X370/X470/B450/X399 Ryzen motherboards. | |
5 | * | |
6 | * Copyright (C) 2018-2019 Ed Brindley <kernel@maidavale.org> | |
7 | * | |
8 | * WMI interface provides: | |
9 | * - CPU Core Voltage, | |
10 | * - CPU SOC Voltage, | |
11 | * - DRAM Voltage, | |
12 | * - VDDP Voltage, | |
13 | * - 1.8V PLL Voltage, | |
14 | * - +12V Voltage, | |
15 | * - +5V Voltage, | |
16 | * - 3VSB Voltage, | |
17 | * - VBAT Voltage, | |
18 | * - AVCC3 Voltage, | |
19 | * - SB 1.05V Voltage, | |
20 | * - CPU Core Voltage, | |
21 | * - CPU SOC Voltage, | |
22 | * - DRAM Voltage, | |
23 | * - CPU Fan RPM, | |
24 | * - Chassis Fan 1 RPM, | |
25 | * - Chassis Fan 2 RPM, | |
26 | * - Chassis Fan 3 RPM, | |
27 | * - HAMP Fan RPM, | |
28 | * - Water Pump RPM, | |
29 | * - CPU OPT RPM, | |
30 | * - Water Flow RPM, | |
31 | * - AIO Pump RPM, | |
32 | * - CPU Temperature, | |
33 | * - CPU Socket Temperature, | |
34 | * - Motherboard Temperature, | |
35 | * - Chipset Temperature, | |
36 | * - Tsensor 1 Temperature, | |
37 | * - CPU VRM Temperature, | |
38 | * - Water In, | |
39 | * - Water Out, | |
40 | * - CPU VRM Output Current. | |
41 | */ | |
42 | ||
43 | #include <linux/acpi.h> | |
44 | #include <linux/dmi.h> | |
45 | #include <linux/hwmon.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/jiffies.h> | |
48 | #include <linux/kernel.h> | |
49 | #include <linux/module.h> | |
50 | #include <linux/mutex.h> | |
51 | #include <linux/units.h> | |
52 | #include <linux/wmi.h> | |
53 | ||
54 | #define ASUSWMI_MONITORING_GUID "466747A0-70EC-11DE-8A39-0800200C9A66" | |
55 | #define ASUSWMI_METHODID_GET_VALUE 0x52574543 /* RWEC */ | |
56 | #define ASUSWMI_METHODID_UPDATE_BUFFER 0x51574543 /* QWEC */ | |
57 | #define ASUSWMI_METHODID_GET_INFO 0x50574543 /* PWEC */ | |
58 | #define ASUSWMI_METHODID_GET_NUMBER 0x50574572 /* PWEr */ | |
59 | #define ASUSWMI_METHODID_GET_VERSION 0x50574574 /* PWEt */ | |
60 | ||
61 | #define ASUS_WMI_MAX_STR_SIZE 32 | |
62 | ||
63 | #define DMI_EXACT_MATCH_ASUS_BOARD_NAME(name) { \ | |
64 | .matches = { \ | |
65 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC."), \ | |
66 | DMI_EXACT_MATCH(DMI_BOARD_NAME, name), \ | |
67 | }, \ | |
68 | } | |
69 | ||
70 | static const struct dmi_system_id asus_wmi_dmi_table[] = { | |
71 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X399-A"), | |
72 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X470-PRO"), | |
73 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI EXTREME"), | |
4fd45cc8 | 74 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("CROSSHAIR VI HERO"), |
548820e2 DP |
75 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI HERO (WI-FI AC)"), |
76 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO"), | |
77 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO (WI-FI)"), | |
78 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-E GAMING"), | |
79 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-F GAMING"), | |
6dd0ea4c | 80 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-F GAMING II"), |
548820e2 DP |
81 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-I GAMING"), |
82 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X399-E GAMING"), | |
83 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-F GAMING"), | |
84 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-I GAMING"), | |
85 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME"), | |
86 | DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME ALPHA"), | |
87 | {} | |
88 | }; | |
89 | MODULE_DEVICE_TABLE(dmi, asus_wmi_dmi_table); | |
90 | ||
91 | enum asus_wmi_sensor_class { | |
92 | VOLTAGE = 0x0, | |
93 | TEMPERATURE_C = 0x1, | |
94 | FAN_RPM = 0x2, | |
95 | CURRENT = 0x3, | |
96 | WATER_FLOW = 0x4, | |
97 | }; | |
98 | ||
99 | enum asus_wmi_location { | |
100 | CPU = 0x0, | |
101 | CPU_SOC = 0x1, | |
102 | DRAM = 0x2, | |
103 | MOTHERBOARD = 0x3, | |
104 | CHIPSET = 0x4, | |
105 | AUX = 0x5, | |
106 | VRM = 0x6, | |
107 | COOLER = 0x7 | |
108 | }; | |
109 | ||
110 | enum asus_wmi_type { | |
111 | SIGNED_INT = 0x0, | |
112 | UNSIGNED_INT = 0x1, | |
113 | SCALED = 0x3, | |
114 | }; | |
115 | ||
116 | enum asus_wmi_source { | |
117 | SIO = 0x1, | |
118 | EC = 0x2 | |
119 | }; | |
120 | ||
121 | static enum hwmon_sensor_types asus_data_types[] = { | |
122 | [VOLTAGE] = hwmon_in, | |
123 | [TEMPERATURE_C] = hwmon_temp, | |
124 | [FAN_RPM] = hwmon_fan, | |
125 | [CURRENT] = hwmon_curr, | |
126 | [WATER_FLOW] = hwmon_fan, | |
127 | }; | |
128 | ||
3315e716 | 129 | static u32 hwmon_attributes[hwmon_max] = { |
548820e2 DP |
130 | [hwmon_chip] = HWMON_C_REGISTER_TZ, |
131 | [hwmon_temp] = HWMON_T_INPUT | HWMON_T_LABEL, | |
132 | [hwmon_in] = HWMON_I_INPUT | HWMON_I_LABEL, | |
133 | [hwmon_curr] = HWMON_C_INPUT | HWMON_C_LABEL, | |
134 | [hwmon_fan] = HWMON_F_INPUT | HWMON_F_LABEL, | |
135 | }; | |
136 | ||
137 | /** | |
138 | * struct asus_wmi_sensor_info - sensor info. | |
139 | * @id: sensor id. | |
140 | * @data_type: sensor class e.g. voltage, temp etc. | |
141 | * @location: sensor location. | |
142 | * @name: sensor name. | |
143 | * @source: sensor source. | |
144 | * @type: sensor type signed, unsigned etc. | |
145 | * @cached_value: cached sensor value. | |
146 | */ | |
147 | struct asus_wmi_sensor_info { | |
148 | u32 id; | |
149 | int data_type; | |
150 | int location; | |
151 | char name[ASUS_WMI_MAX_STR_SIZE]; | |
152 | int source; | |
153 | int type; | |
154 | long cached_value; | |
155 | }; | |
156 | ||
157 | struct asus_wmi_wmi_info { | |
158 | unsigned long source_last_updated[3]; /* in jiffies */ | |
159 | int sensor_count; | |
160 | ||
161 | const struct asus_wmi_sensor_info **info[hwmon_max]; | |
162 | struct asus_wmi_sensor_info **info_by_id; | |
163 | }; | |
164 | ||
165 | struct asus_wmi_sensors { | |
166 | struct asus_wmi_wmi_info wmi; | |
167 | /* lock access to internal cache */ | |
168 | struct mutex lock; | |
169 | }; | |
170 | ||
171 | /* | |
172 | * Universal method for calling WMI method | |
173 | */ | |
174 | static int asus_wmi_call_method(u32 method_id, u32 *args, struct acpi_buffer *output) | |
175 | { | |
176 | struct acpi_buffer input = {(acpi_size) sizeof(*args), args }; | |
177 | acpi_status status; | |
178 | ||
179 | status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0, | |
180 | method_id, &input, output); | |
181 | if (ACPI_FAILURE(status)) | |
182 | return -EIO; | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | /* | |
188 | * Gets the version of the ASUS sensors interface implemented | |
189 | */ | |
190 | static int asus_wmi_get_version(u32 *version) | |
191 | { | |
192 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
193 | u32 args[] = {0, 0, 0}; | |
194 | union acpi_object *obj; | |
195 | int err; | |
196 | ||
197 | err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VERSION, args, &output); | |
198 | if (err) | |
199 | return err; | |
200 | ||
201 | obj = output.pointer; | |
202 | if (!obj) | |
203 | return -EIO; | |
204 | ||
205 | if (obj->type != ACPI_TYPE_INTEGER) { | |
206 | err = -EIO; | |
207 | goto out_free_obj; | |
208 | } | |
209 | ||
210 | err = 0; | |
211 | *version = obj->integer.value; | |
212 | ||
213 | out_free_obj: | |
214 | ACPI_FREE(obj); | |
215 | return err; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Gets the number of sensor items | |
220 | */ | |
221 | static int asus_wmi_get_item_count(u32 *count) | |
222 | { | |
223 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
224 | u32 args[] = {0, 0, 0}; | |
225 | union acpi_object *obj; | |
226 | int err; | |
227 | ||
228 | err = asus_wmi_call_method(ASUSWMI_METHODID_GET_NUMBER, args, &output); | |
229 | if (err) | |
230 | return err; | |
231 | ||
232 | obj = output.pointer; | |
233 | if (!obj) | |
234 | return -EIO; | |
235 | ||
236 | if (obj->type != ACPI_TYPE_INTEGER) { | |
237 | err = -EIO; | |
238 | goto out_free_obj; | |
239 | } | |
240 | ||
241 | err = 0; | |
242 | *count = obj->integer.value; | |
243 | ||
244 | out_free_obj: | |
245 | ACPI_FREE(obj); | |
246 | return err; | |
247 | } | |
248 | ||
249 | static int asus_wmi_hwmon_add_chan_info(struct hwmon_channel_info *asus_wmi_hwmon_chan, | |
250 | struct device *dev, int num, | |
251 | enum hwmon_sensor_types type, u32 config) | |
252 | { | |
253 | u32 *cfg; | |
254 | ||
255 | cfg = devm_kcalloc(dev, num + 1, sizeof(*cfg), GFP_KERNEL); | |
256 | if (!cfg) | |
257 | return -ENOMEM; | |
258 | ||
259 | asus_wmi_hwmon_chan->type = type; | |
260 | asus_wmi_hwmon_chan->config = cfg; | |
261 | memset32(cfg, config, num); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* | |
267 | * For a given sensor item returns details e.g. type (voltage/temperature/fan speed etc), bank etc | |
268 | */ | |
269 | static int asus_wmi_sensor_info(int index, struct asus_wmi_sensor_info *s) | |
270 | { | |
271 | union acpi_object name_obj, data_type_obj, location_obj, source_obj, type_obj; | |
272 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
273 | u32 args[] = {index, 0}; | |
274 | union acpi_object *obj; | |
275 | int err; | |
276 | ||
277 | err = asus_wmi_call_method(ASUSWMI_METHODID_GET_INFO, args, &output); | |
278 | if (err) | |
279 | return err; | |
280 | ||
281 | s->id = index; | |
282 | ||
283 | obj = output.pointer; | |
284 | if (!obj) | |
285 | return -EIO; | |
286 | ||
287 | if (obj->type != ACPI_TYPE_PACKAGE) { | |
288 | err = -EIO; | |
289 | goto out_free_obj; | |
290 | } | |
291 | ||
292 | if (obj->package.count != 5) { | |
293 | err = -EIO; | |
294 | goto out_free_obj; | |
295 | } | |
296 | ||
297 | name_obj = obj->package.elements[0]; | |
298 | if (name_obj.type != ACPI_TYPE_STRING) { | |
299 | err = -EIO; | |
300 | goto out_free_obj; | |
301 | } | |
302 | ||
303 | strncpy(s->name, name_obj.string.pointer, sizeof(s->name) - 1); | |
304 | ||
305 | data_type_obj = obj->package.elements[1]; | |
306 | if (data_type_obj.type != ACPI_TYPE_INTEGER) { | |
307 | err = -EIO; | |
308 | goto out_free_obj; | |
309 | } | |
310 | ||
311 | s->data_type = data_type_obj.integer.value; | |
312 | ||
313 | location_obj = obj->package.elements[2]; | |
314 | if (location_obj.type != ACPI_TYPE_INTEGER) { | |
315 | err = -EIO; | |
316 | goto out_free_obj; | |
317 | } | |
318 | ||
319 | s->location = location_obj.integer.value; | |
320 | ||
321 | source_obj = obj->package.elements[3]; | |
322 | if (source_obj.type != ACPI_TYPE_INTEGER) { | |
323 | err = -EIO; | |
324 | goto out_free_obj; | |
325 | } | |
326 | ||
327 | s->source = source_obj.integer.value; | |
328 | ||
329 | type_obj = obj->package.elements[4]; | |
330 | if (type_obj.type != ACPI_TYPE_INTEGER) { | |
331 | err = -EIO; | |
332 | goto out_free_obj; | |
333 | } | |
334 | ||
335 | err = 0; | |
336 | s->type = type_obj.integer.value; | |
337 | ||
338 | out_free_obj: | |
339 | ACPI_FREE(obj); | |
340 | return err; | |
341 | } | |
342 | ||
343 | static int asus_wmi_update_buffer(int source) | |
344 | { | |
345 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
346 | u32 args[] = {source, 0}; | |
347 | ||
348 | return asus_wmi_call_method(ASUSWMI_METHODID_UPDATE_BUFFER, args, &output); | |
349 | } | |
350 | ||
351 | static int asus_wmi_get_sensor_value(u8 index, long *value) | |
352 | { | |
353 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
354 | u32 args[] = {index, 0}; | |
355 | union acpi_object *obj; | |
356 | int err; | |
357 | ||
358 | err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VALUE, args, &output); | |
359 | if (err) | |
360 | return err; | |
361 | ||
362 | obj = output.pointer; | |
363 | if (!obj) | |
364 | return -EIO; | |
365 | ||
366 | if (obj->type != ACPI_TYPE_INTEGER) { | |
367 | err = -EIO; | |
368 | goto out_free_obj; | |
369 | } | |
370 | ||
371 | err = 0; | |
372 | *value = obj->integer.value; | |
373 | ||
374 | out_free_obj: | |
375 | ACPI_FREE(obj); | |
376 | return err; | |
377 | } | |
378 | ||
379 | static int asus_wmi_update_values_for_source(u8 source, struct asus_wmi_sensors *sensor_data) | |
380 | { | |
381 | struct asus_wmi_sensor_info *sensor; | |
382 | long value = 0; | |
383 | int ret; | |
384 | int i; | |
385 | ||
386 | for (i = 0; i < sensor_data->wmi.sensor_count; i++) { | |
387 | sensor = sensor_data->wmi.info_by_id[i]; | |
388 | if (sensor && sensor->source == source) { | |
389 | ret = asus_wmi_get_sensor_value(sensor->id, &value); | |
390 | if (ret) | |
391 | return ret; | |
392 | ||
393 | sensor->cached_value = value; | |
394 | } | |
395 | } | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | static int asus_wmi_scale_sensor_value(u32 value, int data_type) | |
401 | { | |
402 | /* FAN_RPM and WATER_FLOW don't need scaling */ | |
403 | switch (data_type) { | |
404 | case VOLTAGE: | |
405 | /* value in microVolts */ | |
406 | return DIV_ROUND_CLOSEST(value, KILO); | |
407 | case TEMPERATURE_C: | |
408 | /* value in Celsius */ | |
409 | return value * MILLIDEGREE_PER_DEGREE; | |
410 | case CURRENT: | |
411 | /* value in Amperes */ | |
412 | return value * MILLI; | |
413 | } | |
414 | return value; | |
415 | } | |
416 | ||
417 | static int asus_wmi_get_cached_value_or_update(const struct asus_wmi_sensor_info *sensor, | |
418 | struct asus_wmi_sensors *sensor_data, | |
419 | u32 *value) | |
420 | { | |
421 | int ret = 0; | |
422 | ||
423 | mutex_lock(&sensor_data->lock); | |
424 | ||
425 | if (time_after(jiffies, sensor_data->wmi.source_last_updated[sensor->source] + HZ)) { | |
426 | ret = asus_wmi_update_buffer(sensor->source); | |
427 | if (ret) | |
428 | goto unlock; | |
429 | ||
430 | ret = asus_wmi_update_values_for_source(sensor->source, sensor_data); | |
431 | if (ret) | |
432 | goto unlock; | |
433 | ||
434 | sensor_data->wmi.source_last_updated[sensor->source] = jiffies; | |
435 | } | |
436 | ||
437 | *value = sensor->cached_value; | |
438 | ||
439 | unlock: | |
440 | mutex_unlock(&sensor_data->lock); | |
441 | ||
442 | return ret; | |
443 | } | |
444 | ||
445 | /* Now follow the functions that implement the hwmon interface */ | |
446 | static int asus_wmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type, | |
447 | u32 attr, int channel, long *val) | |
448 | { | |
449 | const struct asus_wmi_sensor_info *sensor; | |
450 | u32 value = 0; | |
451 | int ret; | |
452 | ||
453 | struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev); | |
454 | ||
455 | sensor = *(sensor_data->wmi.info[type] + channel); | |
456 | ||
457 | ret = asus_wmi_get_cached_value_or_update(sensor, sensor_data, &value); | |
458 | if (ret) | |
459 | return ret; | |
460 | ||
461 | *val = asus_wmi_scale_sensor_value(value, sensor->data_type); | |
462 | ||
463 | return ret; | |
464 | } | |
465 | ||
466 | static int asus_wmi_hwmon_read_string(struct device *dev, | |
467 | enum hwmon_sensor_types type, u32 attr, | |
468 | int channel, const char **str) | |
469 | { | |
470 | struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev); | |
471 | const struct asus_wmi_sensor_info *sensor; | |
472 | ||
473 | sensor = *(sensor_data->wmi.info[type] + channel); | |
474 | *str = sensor->name; | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | static umode_t asus_wmi_hwmon_is_visible(const void *drvdata, | |
480 | enum hwmon_sensor_types type, u32 attr, | |
481 | int channel) | |
482 | { | |
483 | const struct asus_wmi_sensors *sensor_data = drvdata; | |
484 | const struct asus_wmi_sensor_info *sensor; | |
485 | ||
486 | sensor = *(sensor_data->wmi.info[type] + channel); | |
487 | if (sensor) | |
488 | return 0444; | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static const struct hwmon_ops asus_wmi_hwmon_ops = { | |
494 | .is_visible = asus_wmi_hwmon_is_visible, | |
495 | .read = asus_wmi_hwmon_read, | |
496 | .read_string = asus_wmi_hwmon_read_string, | |
497 | }; | |
498 | ||
499 | static struct hwmon_chip_info asus_wmi_chip_info = { | |
500 | .ops = &asus_wmi_hwmon_ops, | |
501 | .info = NULL, | |
502 | }; | |
503 | ||
504 | static int asus_wmi_configure_sensor_setup(struct device *dev, | |
505 | struct asus_wmi_sensors *sensor_data) | |
506 | { | |
507 | const struct hwmon_channel_info **ptr_asus_wmi_ci; | |
508 | struct hwmon_channel_info *asus_wmi_hwmon_chan; | |
509 | int nr_count[hwmon_max] = {}, nr_types = 0; | |
510 | struct asus_wmi_sensor_info *temp_sensor; | |
511 | const struct hwmon_chip_info *chip_info; | |
512 | enum hwmon_sensor_types type; | |
513 | struct device *hwdev; | |
514 | int i, idx; | |
515 | int err; | |
516 | ||
548820e2 | 517 | for (i = 0; i < sensor_data->wmi.sensor_count; i++) { |
8e1187fe CJ |
518 | struct asus_wmi_sensor_info sensor; |
519 | ||
520 | err = asus_wmi_sensor_info(i, &sensor); | |
548820e2 DP |
521 | if (err) |
522 | return err; | |
523 | ||
8e1187fe | 524 | switch (sensor.data_type) { |
548820e2 DP |
525 | case TEMPERATURE_C: |
526 | case VOLTAGE: | |
527 | case CURRENT: | |
528 | case FAN_RPM: | |
529 | case WATER_FLOW: | |
8e1187fe | 530 | type = asus_data_types[sensor.data_type]; |
548820e2 DP |
531 | if (!nr_count[type]) |
532 | nr_types++; | |
533 | nr_count[type]++; | |
534 | break; | |
535 | } | |
536 | } | |
537 | ||
538 | if (nr_count[hwmon_temp]) | |
539 | nr_count[hwmon_chip]++, nr_types++; | |
540 | ||
541 | asus_wmi_hwmon_chan = devm_kcalloc(dev, nr_types, | |
542 | sizeof(*asus_wmi_hwmon_chan), | |
543 | GFP_KERNEL); | |
544 | if (!asus_wmi_hwmon_chan) | |
545 | return -ENOMEM; | |
546 | ||
547 | ptr_asus_wmi_ci = devm_kcalloc(dev, nr_types + 1, | |
548 | sizeof(*ptr_asus_wmi_ci), GFP_KERNEL); | |
549 | if (!ptr_asus_wmi_ci) | |
550 | return -ENOMEM; | |
551 | ||
552 | asus_wmi_chip_info.info = ptr_asus_wmi_ci; | |
553 | chip_info = &asus_wmi_chip_info; | |
554 | ||
555 | sensor_data->wmi.info_by_id = devm_kcalloc(dev, sensor_data->wmi.sensor_count, | |
556 | sizeof(*sensor_data->wmi.info_by_id), | |
557 | GFP_KERNEL); | |
558 | ||
559 | if (!sensor_data->wmi.info_by_id) | |
560 | return -ENOMEM; | |
561 | ||
562 | for (type = 0; type < hwmon_max; type++) { | |
563 | if (!nr_count[type]) | |
564 | continue; | |
565 | ||
566 | err = asus_wmi_hwmon_add_chan_info(asus_wmi_hwmon_chan, dev, | |
567 | nr_count[type], type, | |
568 | hwmon_attributes[type]); | |
569 | if (err) | |
570 | return err; | |
571 | ||
572 | *ptr_asus_wmi_ci++ = asus_wmi_hwmon_chan++; | |
573 | ||
574 | sensor_data->wmi.info[type] = devm_kcalloc(dev, | |
575 | nr_count[type], | |
576 | sizeof(*sensor_data->wmi.info), | |
577 | GFP_KERNEL); | |
578 | if (!sensor_data->wmi.info[type]) | |
579 | return -ENOMEM; | |
580 | } | |
581 | ||
582 | for (i = sensor_data->wmi.sensor_count - 1; i >= 0; i--) { | |
583 | temp_sensor = devm_kzalloc(dev, sizeof(*temp_sensor), GFP_KERNEL); | |
584 | if (!temp_sensor) | |
585 | return -ENOMEM; | |
586 | ||
587 | err = asus_wmi_sensor_info(i, temp_sensor); | |
588 | if (err) | |
589 | continue; | |
590 | ||
591 | switch (temp_sensor->data_type) { | |
592 | case TEMPERATURE_C: | |
593 | case VOLTAGE: | |
594 | case CURRENT: | |
595 | case FAN_RPM: | |
596 | case WATER_FLOW: | |
597 | type = asus_data_types[temp_sensor->data_type]; | |
598 | idx = --nr_count[type]; | |
599 | *(sensor_data->wmi.info[type] + idx) = temp_sensor; | |
600 | sensor_data->wmi.info_by_id[i] = temp_sensor; | |
601 | break; | |
602 | } | |
603 | } | |
604 | ||
605 | dev_dbg(dev, "board has %d sensors", | |
606 | sensor_data->wmi.sensor_count); | |
607 | ||
608 | hwdev = devm_hwmon_device_register_with_info(dev, "asus_wmi_sensors", | |
609 | sensor_data, chip_info, NULL); | |
610 | ||
611 | return PTR_ERR_OR_ZERO(hwdev); | |
612 | } | |
613 | ||
614 | static int asus_wmi_probe(struct wmi_device *wdev, const void *context) | |
615 | { | |
616 | struct asus_wmi_sensors *sensor_data; | |
617 | struct device *dev = &wdev->dev; | |
618 | u32 version = 0; | |
619 | ||
620 | if (!dmi_check_system(asus_wmi_dmi_table)) | |
621 | return -ENODEV; | |
622 | ||
623 | sensor_data = devm_kzalloc(dev, sizeof(*sensor_data), GFP_KERNEL); | |
624 | if (!sensor_data) | |
625 | return -ENOMEM; | |
626 | ||
627 | if (asus_wmi_get_version(&version)) | |
628 | return -ENODEV; | |
629 | ||
630 | if (asus_wmi_get_item_count(&sensor_data->wmi.sensor_count)) | |
631 | return -ENODEV; | |
632 | ||
633 | if (sensor_data->wmi.sensor_count <= 0 || version < 2) { | |
634 | dev_info(dev, "version: %u with %d sensors is unsupported\n", | |
635 | version, sensor_data->wmi.sensor_count); | |
636 | ||
637 | return -ENODEV; | |
638 | } | |
639 | ||
640 | mutex_init(&sensor_data->lock); | |
641 | ||
642 | dev_set_drvdata(dev, sensor_data); | |
643 | ||
644 | return asus_wmi_configure_sensor_setup(dev, sensor_data); | |
645 | } | |
646 | ||
647 | static const struct wmi_device_id asus_wmi_id_table[] = { | |
648 | { ASUSWMI_MONITORING_GUID, NULL }, | |
649 | { } | |
650 | }; | |
651 | ||
652 | static struct wmi_driver asus_sensors_wmi_driver = { | |
653 | .driver = { | |
654 | .name = "asus_wmi_sensors", | |
655 | }, | |
656 | .id_table = asus_wmi_id_table, | |
657 | .probe = asus_wmi_probe, | |
658 | }; | |
659 | module_wmi_driver(asus_sensors_wmi_driver); | |
660 | ||
661 | MODULE_AUTHOR("Ed Brindley <kernel@maidavale.org>"); | |
662 | MODULE_DESCRIPTION("Asus WMI Sensors Driver"); | |
663 | MODULE_LICENSE("GPL"); |