1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2007-2009 Luca Tettamanti <kronos.it@gmail.com> |
4 | * |
5 | * See COPYING in the top level directory of the kernel tree. |
6 | */ |
7 | |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | |
10 | #include <linux/debugfs.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/hwmon.h> |
13 | #include <linux/list.h> |
14 | #include <linux/module.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/dmi.h> |
17 | #include <linux/jiffies.h> |
18 | #include <linux/err.h> |
19 | #include <linux/acpi.h> |
20 | |
21 | #define ATK_HID "ATK0110" |
22 | |
23 | static bool new_if; |
24 | module_param(new_if, bool, 0); |
25 | MODULE_PARM_DESC(new_if, "Override detection heuristic and force the use of the new ATK0110 interface" ); |
26 | |
27 | static const struct dmi_system_id __initconst atk_force_new_if[] = { |
28 | { |
29 | /* Old interface has broken MCH temp monitoring */ |
30 | .ident = "Asus Sabertooth X58" , |
31 | .matches = { |
32 | DMI_MATCH(DMI_BOARD_NAME, "SABERTOOTH X58" ) |
33 | } |
34 | }, { |
35 | /* Old interface reads the same sensor for fan0 and fan1 */ |
36 | .ident = "Asus M5A78L" , |
37 | .matches = { |
38 | DMI_MATCH(DMI_BOARD_NAME, "M5A78L" ) |
39 | } |
40 | }, |
41 | { } |
42 | }; |
43 | |
44 | /* |
45 | * Minimum time between readings, enforced in order to avoid |
46 | * hogging the CPU. |
47 | */ |
48 | #define CACHE_TIME HZ |
49 | |
50 | #define BOARD_ID "MBIF" |
51 | #define METHOD_ENUMERATE "GGRP" |
52 | #define METHOD_READ "GITM" |
53 | #define METHOD_WRITE "SITM" |
54 | #define METHOD_OLD_READ_TMP "RTMP" |
55 | #define METHOD_OLD_READ_VLT "RVLT" |
56 | #define METHOD_OLD_READ_FAN "RFAN" |
57 | #define METHOD_OLD_ENUM_TMP "TSIF" |
58 | #define METHOD_OLD_ENUM_VLT "VSIF" |
59 | #define METHOD_OLD_ENUM_FAN "FSIF" |
60 | |
61 | #define ATK_MUX_HWMON 0x00000006ULL |
62 | #define ATK_MUX_MGMT 0x00000011ULL |
63 | |
64 | #define ATK_CLASS_MASK 0xff000000ULL |
65 | #define ATK_CLASS_FREQ_CTL 0x03000000ULL |
66 | #define ATK_CLASS_FAN_CTL 0x04000000ULL |
67 | #define ATK_CLASS_HWMON 0x06000000ULL |
68 | #define ATK_CLASS_MGMT 0x11000000ULL |
69 | |
70 | #define ATK_TYPE_MASK 0x00ff0000ULL |
71 | #define HWMON_TYPE_VOLT 0x00020000ULL |
72 | #define HWMON_TYPE_TEMP 0x00030000ULL |
73 | #define HWMON_TYPE_FAN 0x00040000ULL |
74 | |
75 | #define ATK_ELEMENT_ID_MASK 0x0000ffffULL |
76 | |
77 | #define ATK_EC_ID 0x11060004ULL |
78 | |
79 | enum atk_pack_member { |
80 | HWMON_PACK_FLAGS, |
81 | HWMON_PACK_NAME, |
82 | HWMON_PACK_LIMIT1, |
83 | HWMON_PACK_LIMIT2, |
84 | HWMON_PACK_ENABLE |
85 | }; |
86 | |
87 | /* New package format */ |
88 | #define _HWMON_NEW_PACK_SIZE 7 |
89 | #define _HWMON_NEW_PACK_FLAGS 0 |
90 | #define _HWMON_NEW_PACK_NAME 1 |
91 | #define _HWMON_NEW_PACK_UNK1 2 |
92 | #define _HWMON_NEW_PACK_UNK2 3 |
93 | #define _HWMON_NEW_PACK_LIMIT1 4 |
94 | #define _HWMON_NEW_PACK_LIMIT2 5 |
95 | #define _HWMON_NEW_PACK_ENABLE 6 |
96 | |
97 | /* Old package format */ |
98 | #define _HWMON_OLD_PACK_SIZE 5 |
99 | #define _HWMON_OLD_PACK_FLAGS 0 |
100 | #define _HWMON_OLD_PACK_NAME 1 |
101 | #define _HWMON_OLD_PACK_LIMIT1 2 |
102 | #define _HWMON_OLD_PACK_LIMIT2 3 |
103 | #define _HWMON_OLD_PACK_ENABLE 4 |
104 | |
105 | |
106 | struct atk_data { |
107 | struct device *hwmon_dev; |
108 | acpi_handle atk_handle; |
109 | struct acpi_device *acpi_dev; |
110 | |
111 | bool old_interface; |
112 | |
113 | /* old interface */ |
114 | acpi_handle rtmp_handle; |
115 | acpi_handle rvlt_handle; |
116 | acpi_handle rfan_handle; |
117 | /* new interface */ |
118 | acpi_handle enumerate_handle; |
119 | acpi_handle read_handle; |
120 | acpi_handle write_handle; |
121 | |
122 | bool disable_ec; |
123 | |
124 | int voltage_count; |
125 | int temperature_count; |
126 | int fan_count; |
127 | struct list_head sensor_list; |
128 | struct attribute_group attr_group; |
129 | const struct attribute_group *attr_groups[2]; |
130 | |
131 | struct { |
132 | struct dentry *root; |
133 | u32 id; |
134 | } debugfs; |
135 | }; |
136 | |
137 | |
138 | typedef ssize_t (*sysfs_show_func)(struct device *dev, |
139 | struct device_attribute *attr, char *buf); |
140 | |
141 | static const struct acpi_device_id atk_ids[] = { |
142 | {ATK_HID, 0}, |
143 | {"" , 0}, |
144 | }; |
145 | MODULE_DEVICE_TABLE(acpi, atk_ids); |
146 | |
147 | #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */ |
148 | |
149 | struct atk_sensor_data { |
150 | struct list_head list; |
151 | struct atk_data *data; |
152 | struct device_attribute label_attr; |
153 | struct device_attribute input_attr; |
154 | struct device_attribute limit1_attr; |
155 | struct device_attribute limit2_attr; |
156 | char label_attr_name[ATTR_NAME_SIZE]; |
157 | char input_attr_name[ATTR_NAME_SIZE]; |
158 | char limit1_attr_name[ATTR_NAME_SIZE]; |
159 | char limit2_attr_name[ATTR_NAME_SIZE]; |
160 | u64 id; |
161 | u64 type; |
162 | u64 limit1; |
163 | u64 limit2; |
164 | u64 cached_value; |
165 | unsigned long last_updated; /* in jiffies */ |
166 | bool is_valid; |
167 | char const *acpi_name; |
168 | }; |
169 | |
170 | /* |
171 | * Return buffer format: |
172 | * [0-3] "value" is valid flag |
173 | * [4-7] value |
174 | * [8- ] unknown stuff on newer mobos |
175 | */ |
176 | struct atk_acpi_ret_buffer { |
177 | u32 flags; |
178 | u32 value; |
179 | u8 data[]; |
180 | }; |
181 | |
182 | /* Input buffer used for GITM and SITM methods */ |
183 | struct atk_acpi_input_buf { |
184 | u32 id; |
185 | u32 param1; |
186 | u32 param2; |
187 | }; |
188 | |
189 | static int atk_add(struct acpi_device *device); |
190 | static void atk_remove(struct acpi_device *device); |
191 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj); |
192 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value); |
193 | |
194 | static struct acpi_driver atk_driver = { |
195 | .name = ATK_HID, |
196 | .class = "hwmon" , |
197 | .ids = atk_ids, |
198 | .ops = { |
199 | .add = atk_add, |
200 | .remove = atk_remove, |
201 | }, |
202 | }; |
203 | |
204 | #define input_to_atk_sensor(attr) \ |
205 | container_of(attr, struct atk_sensor_data, input_attr) |
206 | |
207 | #define label_to_atk_sensor(attr) \ |
208 | container_of(attr, struct atk_sensor_data, label_attr) |
209 | |
210 | #define limit1_to_atk_sensor(attr) \ |
211 | container_of(attr, struct atk_sensor_data, limit1_attr) |
212 | |
213 | #define limit2_to_atk_sensor(attr) \ |
214 | container_of(attr, struct atk_sensor_data, limit2_attr) |
215 | |
216 | static ssize_t atk_input_show(struct device *dev, |
217 | struct device_attribute *attr, char *buf) |
218 | { |
219 | struct atk_sensor_data *s = input_to_atk_sensor(attr); |
220 | u64 value; |
221 | int err; |
222 | |
223 | err = atk_read_value(sensor: s, value: &value); |
224 | if (err) |
225 | return err; |
226 | |
227 | if (s->type == HWMON_TYPE_TEMP) |
228 | /* ACPI returns decidegree */ |
229 | value *= 100; |
230 | |
231 | return sprintf(buf, fmt: "%llu\n" , value); |
232 | } |
233 | |
234 | static ssize_t atk_label_show(struct device *dev, |
235 | struct device_attribute *attr, char *buf) |
236 | { |
237 | struct atk_sensor_data *s = label_to_atk_sensor(attr); |
238 | |
239 | return sprintf(buf, fmt: "%s\n" , s->acpi_name); |
240 | } |
241 | |
242 | static ssize_t atk_limit1_show(struct device *dev, |
243 | struct device_attribute *attr, char *buf) |
244 | { |
245 | struct atk_sensor_data *s = limit1_to_atk_sensor(attr); |
246 | u64 value = s->limit1; |
247 | |
248 | if (s->type == HWMON_TYPE_TEMP) |
249 | value *= 100; |
250 | |
251 | return sprintf(buf, fmt: "%lld\n" , value); |
252 | } |
253 | |
254 | static ssize_t atk_limit2_show(struct device *dev, |
255 | struct device_attribute *attr, char *buf) |
256 | { |
257 | struct atk_sensor_data *s = limit2_to_atk_sensor(attr); |
258 | u64 value = s->limit2; |
259 | |
260 | if (s->type == HWMON_TYPE_TEMP) |
261 | value *= 100; |
262 | |
263 | return sprintf(buf, fmt: "%lld\n" , value); |
264 | } |
265 | |
266 | static void atk_init_attribute(struct device_attribute *attr, char *name, |
267 | sysfs_show_func show) |
268 | { |
269 | sysfs_attr_init(&attr->attr); |
270 | attr->attr.name = name; |
271 | attr->attr.mode = 0444; |
272 | attr->show = show; |
273 | attr->store = NULL; |
274 | } |
275 | |
276 | |
277 | static union acpi_object *atk_get_pack_member(struct atk_data *data, |
278 | union acpi_object *pack, |
279 | enum atk_pack_member m) |
280 | { |
281 | bool old_if = data->old_interface; |
282 | int offset; |
283 | |
284 | switch (m) { |
285 | case HWMON_PACK_FLAGS: |
286 | offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS; |
287 | break; |
288 | case HWMON_PACK_NAME: |
289 | offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME; |
290 | break; |
291 | case HWMON_PACK_LIMIT1: |
292 | offset = old_if ? _HWMON_OLD_PACK_LIMIT1 : |
293 | _HWMON_NEW_PACK_LIMIT1; |
294 | break; |
295 | case HWMON_PACK_LIMIT2: |
296 | offset = old_if ? _HWMON_OLD_PACK_LIMIT2 : |
297 | _HWMON_NEW_PACK_LIMIT2; |
298 | break; |
299 | case HWMON_PACK_ENABLE: |
300 | offset = old_if ? _HWMON_OLD_PACK_ENABLE : |
301 | _HWMON_NEW_PACK_ENABLE; |
302 | break; |
303 | default: |
304 | return NULL; |
305 | } |
306 | |
307 | return &pack->package.elements[offset]; |
308 | } |
309 | |
310 | |
311 | /* |
312 | * New package format is: |
313 | * - flag (int) |
314 | * class - used for de-muxing the request to the correct GITn |
315 | * type (volt, temp, fan) |
316 | * sensor id | |
317 | * sensor id - used for de-muxing the request _inside_ the GITn |
318 | * - name (str) |
319 | * - unknown (int) |
320 | * - unknown (int) |
321 | * - limit1 (int) |
322 | * - limit2 (int) |
323 | * - enable (int) |
324 | * |
325 | * The old package has the same format but it's missing the two unknown fields. |
326 | */ |
327 | static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj) |
328 | { |
329 | struct device *dev = &data->acpi_dev->dev; |
330 | union acpi_object *tmp; |
331 | bool old_if = data->old_interface; |
332 | int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE : |
333 | _HWMON_NEW_PACK_SIZE; |
334 | |
335 | if (obj->type != ACPI_TYPE_PACKAGE) { |
336 | dev_warn(dev, "Invalid type: %d\n" , obj->type); |
337 | return -EINVAL; |
338 | } |
339 | |
340 | if (obj->package.count != expected_size) { |
341 | dev_warn(dev, "Invalid package size: %d, expected: %d\n" , |
342 | obj->package.count, expected_size); |
343 | return -EINVAL; |
344 | } |
345 | |
346 | tmp = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_FLAGS); |
347 | if (tmp->type != ACPI_TYPE_INTEGER) { |
348 | dev_warn(dev, "Invalid type (flag): %d\n" , tmp->type); |
349 | return -EINVAL; |
350 | } |
351 | |
352 | tmp = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_NAME); |
353 | if (tmp->type != ACPI_TYPE_STRING) { |
354 | dev_warn(dev, "Invalid type (name): %d\n" , tmp->type); |
355 | return -EINVAL; |
356 | } |
357 | |
358 | /* Don't check... we don't know what they're useful for anyway */ |
359 | #if 0 |
360 | tmp = &obj->package.elements[HWMON_PACK_UNK1]; |
361 | if (tmp->type != ACPI_TYPE_INTEGER) { |
362 | dev_warn(dev, "Invalid type (unk1): %d\n" , tmp->type); |
363 | return -EINVAL; |
364 | } |
365 | |
366 | tmp = &obj->package.elements[HWMON_PACK_UNK2]; |
367 | if (tmp->type != ACPI_TYPE_INTEGER) { |
368 | dev_warn(dev, "Invalid type (unk2): %d\n" , tmp->type); |
369 | return -EINVAL; |
370 | } |
371 | #endif |
372 | |
373 | tmp = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_LIMIT1); |
374 | if (tmp->type != ACPI_TYPE_INTEGER) { |
375 | dev_warn(dev, "Invalid type (limit1): %d\n" , tmp->type); |
376 | return -EINVAL; |
377 | } |
378 | |
379 | tmp = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_LIMIT2); |
380 | if (tmp->type != ACPI_TYPE_INTEGER) { |
381 | dev_warn(dev, "Invalid type (limit2): %d\n" , tmp->type); |
382 | return -EINVAL; |
383 | } |
384 | |
385 | tmp = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_ENABLE); |
386 | if (tmp->type != ACPI_TYPE_INTEGER) { |
387 | dev_warn(dev, "Invalid type (enable): %d\n" , tmp->type); |
388 | return -EINVAL; |
389 | } |
390 | |
391 | atk_print_sensor(data, obj); |
392 | |
393 | return 0; |
394 | } |
395 | |
396 | #ifdef DEBUG |
397 | static char const *atk_sensor_type(union acpi_object *flags) |
398 | { |
399 | u64 type = flags->integer.value & ATK_TYPE_MASK; |
400 | char const *what; |
401 | |
402 | switch (type) { |
403 | case HWMON_TYPE_VOLT: |
404 | what = "voltage" ; |
405 | break; |
406 | case HWMON_TYPE_TEMP: |
407 | what = "temperature" ; |
408 | break; |
409 | case HWMON_TYPE_FAN: |
410 | what = "fan" ; |
411 | break; |
412 | default: |
413 | what = "unknown" ; |
414 | break; |
415 | } |
416 | |
417 | return what; |
418 | } |
419 | #endif |
420 | |
421 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj) |
422 | { |
423 | #ifdef DEBUG |
424 | struct device *dev = &data->acpi_dev->dev; |
425 | union acpi_object *flags; |
426 | union acpi_object *name; |
427 | union acpi_object *limit1; |
428 | union acpi_object *limit2; |
429 | union acpi_object *enable; |
430 | char const *what; |
431 | |
432 | flags = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_FLAGS); |
433 | name = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_NAME); |
434 | limit1 = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_LIMIT1); |
435 | limit2 = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_LIMIT2); |
436 | enable = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_ENABLE); |
437 | |
438 | what = atk_sensor_type(flags); |
439 | |
440 | dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n" , what, |
441 | flags->integer.value, |
442 | name->string.pointer, |
443 | limit1->integer.value, limit2->integer.value, |
444 | enable->integer.value ? "enabled" : "disabled" ); |
445 | #endif |
446 | } |
447 | |
448 | static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value) |
449 | { |
450 | struct atk_data *data = sensor->data; |
451 | struct device *dev = &data->acpi_dev->dev; |
452 | struct acpi_object_list params; |
453 | union acpi_object id; |
454 | acpi_status status; |
455 | acpi_handle method; |
456 | |
457 | switch (sensor->type) { |
458 | case HWMON_TYPE_VOLT: |
459 | method = data->rvlt_handle; |
460 | break; |
461 | case HWMON_TYPE_TEMP: |
462 | method = data->rtmp_handle; |
463 | break; |
464 | case HWMON_TYPE_FAN: |
465 | method = data->rfan_handle; |
466 | break; |
467 | default: |
468 | return -EINVAL; |
469 | } |
470 | |
471 | id.type = ACPI_TYPE_INTEGER; |
472 | id.integer.value = sensor->id; |
473 | |
474 | params.count = 1; |
475 | params.pointer = &id; |
476 | |
477 | status = acpi_evaluate_integer(handle: method, NULL, arguments: ¶ms, data: value); |
478 | if (status != AE_OK) { |
479 | dev_warn(dev, "%s: ACPI exception: %s\n" , __func__, |
480 | acpi_format_exception(status)); |
481 | return -EIO; |
482 | } |
483 | |
484 | return 0; |
485 | } |
486 | |
487 | static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux) |
488 | { |
489 | struct device *dev = &data->acpi_dev->dev; |
490 | struct acpi_buffer buf; |
491 | acpi_status ret; |
492 | struct acpi_object_list params; |
493 | union acpi_object id; |
494 | union acpi_object *pack; |
495 | |
496 | id.type = ACPI_TYPE_INTEGER; |
497 | id.integer.value = mux; |
498 | params.count = 1; |
499 | params.pointer = &id; |
500 | |
501 | buf.length = ACPI_ALLOCATE_BUFFER; |
502 | ret = acpi_evaluate_object(object: data->enumerate_handle, NULL, parameter_objects: ¶ms, return_object_buffer: &buf); |
503 | if (ret != AE_OK) { |
504 | dev_err(dev, "GGRP[%#x] ACPI exception: %s\n" , mux, |
505 | acpi_format_exception(ret)); |
506 | return ERR_PTR(error: -EIO); |
507 | } |
508 | pack = buf.pointer; |
509 | if (pack->type != ACPI_TYPE_PACKAGE) { |
510 | /* Execution was successful, but the id was not found */ |
511 | ACPI_FREE(pack); |
512 | return ERR_PTR(error: -ENOENT); |
513 | } |
514 | |
515 | if (pack->package.count < 1) { |
516 | dev_err(dev, "GGRP[%#x] package is too small\n" , mux); |
517 | ACPI_FREE(pack); |
518 | return ERR_PTR(error: -EIO); |
519 | } |
520 | return pack; |
521 | } |
522 | |
523 | static union acpi_object *atk_gitm(struct atk_data *data, u64 id) |
524 | { |
525 | struct device *dev = &data->acpi_dev->dev; |
526 | struct atk_acpi_input_buf buf; |
527 | union acpi_object tmp; |
528 | struct acpi_object_list params; |
529 | struct acpi_buffer ret; |
530 | union acpi_object *obj; |
531 | acpi_status status; |
532 | |
533 | buf.id = id; |
534 | buf.param1 = 0; |
535 | buf.param2 = 0; |
536 | |
537 | tmp.type = ACPI_TYPE_BUFFER; |
538 | tmp.buffer.pointer = (u8 *)&buf; |
539 | tmp.buffer.length = sizeof(buf); |
540 | |
541 | params.count = 1; |
542 | params.pointer = (void *)&tmp; |
543 | |
544 | ret.length = ACPI_ALLOCATE_BUFFER; |
545 | status = acpi_evaluate_object_typed(object: data->read_handle, NULL, external_params: ¶ms, |
546 | return_buffer: &ret, ACPI_TYPE_BUFFER); |
547 | if (status != AE_OK) { |
548 | dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n" , id, |
549 | acpi_format_exception(status)); |
550 | return ERR_PTR(error: -EIO); |
551 | } |
552 | obj = ret.pointer; |
553 | |
554 | /* Sanity check */ |
555 | if (obj->buffer.length < 8) { |
556 | dev_warn(dev, "Unexpected ASBF length: %u\n" , |
557 | obj->buffer.length); |
558 | ACPI_FREE(obj); |
559 | return ERR_PTR(error: -EIO); |
560 | } |
561 | return obj; |
562 | } |
563 | |
564 | static union acpi_object *atk_sitm(struct atk_data *data, |
565 | struct atk_acpi_input_buf *buf) |
566 | { |
567 | struct device *dev = &data->acpi_dev->dev; |
568 | struct acpi_object_list params; |
569 | union acpi_object tmp; |
570 | struct acpi_buffer ret; |
571 | union acpi_object *obj; |
572 | acpi_status status; |
573 | |
574 | tmp.type = ACPI_TYPE_BUFFER; |
575 | tmp.buffer.pointer = (u8 *)buf; |
576 | tmp.buffer.length = sizeof(*buf); |
577 | |
578 | params.count = 1; |
579 | params.pointer = &tmp; |
580 | |
581 | ret.length = ACPI_ALLOCATE_BUFFER; |
582 | status = acpi_evaluate_object_typed(object: data->write_handle, NULL, external_params: ¶ms, |
583 | return_buffer: &ret, ACPI_TYPE_BUFFER); |
584 | if (status != AE_OK) { |
585 | dev_warn(dev, "SITM[%#x] ACPI exception: %s\n" , buf->id, |
586 | acpi_format_exception(status)); |
587 | return ERR_PTR(error: -EIO); |
588 | } |
589 | obj = ret.pointer; |
590 | |
591 | /* Sanity check */ |
592 | if (obj->buffer.length < 8) { |
593 | dev_warn(dev, "Unexpected ASBF length: %u\n" , |
594 | obj->buffer.length); |
595 | ACPI_FREE(obj); |
596 | return ERR_PTR(error: -EIO); |
597 | } |
598 | return obj; |
599 | } |
600 | |
601 | static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value) |
602 | { |
603 | struct atk_data *data = sensor->data; |
604 | struct device *dev = &data->acpi_dev->dev; |
605 | union acpi_object *obj; |
606 | struct atk_acpi_ret_buffer *buf; |
607 | int err = 0; |
608 | |
609 | obj = atk_gitm(data, id: sensor->id); |
610 | if (IS_ERR(ptr: obj)) |
611 | return PTR_ERR(ptr: obj); |
612 | |
613 | buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; |
614 | if (buf->flags == 0) { |
615 | /* |
616 | * The reading is not valid, possible causes: |
617 | * - sensor failure |
618 | * - enumeration was FUBAR (and we didn't notice) |
619 | */ |
620 | dev_warn(dev, "Read failed, sensor = %#llx\n" , sensor->id); |
621 | err = -EIO; |
622 | goto out; |
623 | } |
624 | |
625 | *value = buf->value; |
626 | out: |
627 | ACPI_FREE(obj); |
628 | return err; |
629 | } |
630 | |
631 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value) |
632 | { |
633 | int err; |
634 | |
635 | if (!sensor->is_valid || |
636 | time_after(jiffies, sensor->last_updated + CACHE_TIME)) { |
637 | if (sensor->data->old_interface) |
638 | err = atk_read_value_old(sensor, value); |
639 | else |
640 | err = atk_read_value_new(sensor, value); |
641 | |
642 | if (err) |
643 | return err; |
644 | |
645 | sensor->is_valid = true; |
646 | sensor->last_updated = jiffies; |
647 | sensor->cached_value = *value; |
648 | } else { |
649 | *value = sensor->cached_value; |
650 | err = 0; |
651 | } |
652 | |
653 | return err; |
654 | } |
655 | |
656 | #ifdef CONFIG_DEBUG_FS |
657 | static int atk_debugfs_gitm_get(void *p, u64 *val) |
658 | { |
659 | struct atk_data *data = p; |
660 | union acpi_object *ret; |
661 | struct atk_acpi_ret_buffer *buf; |
662 | int err = 0; |
663 | |
664 | if (!data->read_handle) |
665 | return -ENODEV; |
666 | |
667 | if (!data->debugfs.id) |
668 | return -EINVAL; |
669 | |
670 | ret = atk_gitm(data, id: data->debugfs.id); |
671 | if (IS_ERR(ptr: ret)) |
672 | return PTR_ERR(ptr: ret); |
673 | |
674 | buf = (struct atk_acpi_ret_buffer *)ret->buffer.pointer; |
675 | if (buf->flags) |
676 | *val = buf->value; |
677 | else |
678 | err = -EIO; |
679 | |
680 | ACPI_FREE(ret); |
681 | return err; |
682 | } |
683 | |
684 | DEFINE_DEBUGFS_ATTRIBUTE(atk_debugfs_gitm, atk_debugfs_gitm_get, NULL, |
685 | "0x%08llx\n" ); |
686 | |
687 | static int atk_acpi_print(char *buf, size_t sz, union acpi_object *obj) |
688 | { |
689 | int ret = 0; |
690 | |
691 | switch (obj->type) { |
692 | case ACPI_TYPE_INTEGER: |
693 | ret = snprintf(buf, size: sz, fmt: "0x%08llx\n" , obj->integer.value); |
694 | break; |
695 | case ACPI_TYPE_STRING: |
696 | ret = snprintf(buf, size: sz, fmt: "%s\n" , obj->string.pointer); |
697 | break; |
698 | } |
699 | |
700 | return ret; |
701 | } |
702 | |
703 | static void atk_pack_print(char *buf, size_t sz, union acpi_object *pack) |
704 | { |
705 | int ret; |
706 | int i; |
707 | |
708 | for (i = 0; i < pack->package.count; i++) { |
709 | union acpi_object *obj = &pack->package.elements[i]; |
710 | |
711 | ret = atk_acpi_print(buf, sz, obj); |
712 | if (ret >= sz) |
713 | break; |
714 | buf += ret; |
715 | sz -= ret; |
716 | } |
717 | } |
718 | |
719 | static int atk_debugfs_ggrp_open(struct inode *inode, struct file *file) |
720 | { |
721 | struct atk_data *data = inode->i_private; |
722 | char *buf = NULL; |
723 | union acpi_object *ret; |
724 | u8 cls; |
725 | int i; |
726 | |
727 | if (!data->enumerate_handle) |
728 | return -ENODEV; |
729 | if (!data->debugfs.id) |
730 | return -EINVAL; |
731 | |
732 | cls = (data->debugfs.id & 0xff000000) >> 24; |
733 | ret = atk_ggrp(data, mux: cls); |
734 | if (IS_ERR(ptr: ret)) |
735 | return PTR_ERR(ptr: ret); |
736 | |
737 | for (i = 0; i < ret->package.count; i++) { |
738 | union acpi_object *pack = &ret->package.elements[i]; |
739 | union acpi_object *id; |
740 | |
741 | if (pack->type != ACPI_TYPE_PACKAGE) |
742 | continue; |
743 | if (!pack->package.count) |
744 | continue; |
745 | id = &pack->package.elements[0]; |
746 | if (id->integer.value == data->debugfs.id) { |
747 | /* Print the package */ |
748 | buf = kzalloc(size: 512, GFP_KERNEL); |
749 | if (!buf) { |
750 | ACPI_FREE(ret); |
751 | return -ENOMEM; |
752 | } |
753 | atk_pack_print(buf, sz: 512, pack); |
754 | break; |
755 | } |
756 | } |
757 | ACPI_FREE(ret); |
758 | |
759 | if (!buf) |
760 | return -EINVAL; |
761 | |
762 | file->private_data = buf; |
763 | |
764 | return nonseekable_open(inode, filp: file); |
765 | } |
766 | |
767 | static ssize_t atk_debugfs_ggrp_read(struct file *file, char __user *buf, |
768 | size_t count, loff_t *pos) |
769 | { |
770 | char *str = file->private_data; |
771 | size_t len = strlen(str); |
772 | |
773 | return simple_read_from_buffer(to: buf, count, ppos: pos, from: str, available: len); |
774 | } |
775 | |
776 | static int atk_debugfs_ggrp_release(struct inode *inode, struct file *file) |
777 | { |
778 | kfree(objp: file->private_data); |
779 | return 0; |
780 | } |
781 | |
782 | static const struct file_operations atk_debugfs_ggrp_fops = { |
783 | .read = atk_debugfs_ggrp_read, |
784 | .open = atk_debugfs_ggrp_open, |
785 | .release = atk_debugfs_ggrp_release, |
786 | .llseek = no_llseek, |
787 | }; |
788 | |
789 | static void atk_debugfs_init(struct atk_data *data) |
790 | { |
791 | struct dentry *d; |
792 | |
793 | data->debugfs.id = 0; |
794 | |
795 | d = debugfs_create_dir(name: "asus_atk0110" , NULL); |
796 | |
797 | debugfs_create_x32(name: "id" , mode: 0600, parent: d, value: &data->debugfs.id); |
798 | debugfs_create_file_unsafe(name: "gitm" , mode: 0400, parent: d, data, fops: &atk_debugfs_gitm); |
799 | debugfs_create_file(name: "ggrp" , mode: 0400, parent: d, data, fops: &atk_debugfs_ggrp_fops); |
800 | |
801 | data->debugfs.root = d; |
802 | } |
803 | |
804 | static void atk_debugfs_cleanup(struct atk_data *data) |
805 | { |
806 | debugfs_remove_recursive(dentry: data->debugfs.root); |
807 | } |
808 | |
809 | #else /* CONFIG_DEBUG_FS */ |
810 | |
811 | static void atk_debugfs_init(struct atk_data *data) |
812 | { |
813 | } |
814 | |
815 | static void atk_debugfs_cleanup(struct atk_data *data) |
816 | { |
817 | } |
818 | #endif |
819 | |
820 | static int atk_add_sensor(struct atk_data *data, union acpi_object *obj) |
821 | { |
822 | struct device *dev = &data->acpi_dev->dev; |
823 | union acpi_object *flags; |
824 | union acpi_object *name; |
825 | union acpi_object *limit1; |
826 | union acpi_object *limit2; |
827 | union acpi_object *enable; |
828 | struct atk_sensor_data *sensor; |
829 | char const *base_name; |
830 | char const *limit1_name; |
831 | char const *limit2_name; |
832 | u64 type; |
833 | int err; |
834 | int *num; |
835 | int start; |
836 | |
837 | if (obj->type != ACPI_TYPE_PACKAGE) { |
838 | /* wft is this? */ |
839 | dev_warn(dev, "Unknown type for ACPI object: (%d)\n" , |
840 | obj->type); |
841 | return -EINVAL; |
842 | } |
843 | |
844 | err = validate_hwmon_pack(data, obj); |
845 | if (err) |
846 | return err; |
847 | |
848 | /* Ok, we have a valid hwmon package */ |
849 | type = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_FLAGS)->integer.value |
850 | & ATK_TYPE_MASK; |
851 | |
852 | switch (type) { |
853 | case HWMON_TYPE_VOLT: |
854 | base_name = "in" ; |
855 | limit1_name = "min" ; |
856 | limit2_name = "max" ; |
857 | num = &data->voltage_count; |
858 | start = 0; |
859 | break; |
860 | case HWMON_TYPE_TEMP: |
861 | base_name = "temp" ; |
862 | limit1_name = "max" ; |
863 | limit2_name = "crit" ; |
864 | num = &data->temperature_count; |
865 | start = 1; |
866 | break; |
867 | case HWMON_TYPE_FAN: |
868 | base_name = "fan" ; |
869 | limit1_name = "min" ; |
870 | limit2_name = "max" ; |
871 | num = &data->fan_count; |
872 | start = 1; |
873 | break; |
874 | default: |
875 | dev_warn(dev, "Unknown sensor type: %#llx\n" , type); |
876 | return -EINVAL; |
877 | } |
878 | |
879 | enable = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_ENABLE); |
880 | if (!enable->integer.value) |
881 | /* sensor is disabled */ |
882 | return 0; |
883 | |
884 | flags = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_FLAGS); |
885 | name = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_NAME); |
886 | limit1 = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_LIMIT1); |
887 | limit2 = atk_get_pack_member(data, pack: obj, m: HWMON_PACK_LIMIT2); |
888 | |
889 | sensor = devm_kzalloc(dev, size: sizeof(*sensor), GFP_KERNEL); |
890 | if (!sensor) |
891 | return -ENOMEM; |
892 | |
893 | sensor->acpi_name = devm_kstrdup(dev, s: name->string.pointer, GFP_KERNEL); |
894 | if (!sensor->acpi_name) |
895 | return -ENOMEM; |
896 | |
897 | INIT_LIST_HEAD(list: &sensor->list); |
898 | sensor->type = type; |
899 | sensor->data = data; |
900 | sensor->id = flags->integer.value; |
901 | sensor->limit1 = limit1->integer.value; |
902 | if (data->old_interface) |
903 | sensor->limit2 = limit2->integer.value; |
904 | else |
905 | /* The upper limit is expressed as delta from lower limit */ |
906 | sensor->limit2 = sensor->limit1 + limit2->integer.value; |
907 | |
908 | snprintf(buf: sensor->input_attr_name, ATTR_NAME_SIZE, |
909 | fmt: "%s%d_input" , base_name, start + *num); |
910 | atk_init_attribute(attr: &sensor->input_attr, |
911 | name: sensor->input_attr_name, |
912 | show: atk_input_show); |
913 | |
914 | snprintf(buf: sensor->label_attr_name, ATTR_NAME_SIZE, |
915 | fmt: "%s%d_label" , base_name, start + *num); |
916 | atk_init_attribute(attr: &sensor->label_attr, |
917 | name: sensor->label_attr_name, |
918 | show: atk_label_show); |
919 | |
920 | snprintf(buf: sensor->limit1_attr_name, ATTR_NAME_SIZE, |
921 | fmt: "%s%d_%s" , base_name, start + *num, limit1_name); |
922 | atk_init_attribute(attr: &sensor->limit1_attr, |
923 | name: sensor->limit1_attr_name, |
924 | show: atk_limit1_show); |
925 | |
926 | snprintf(buf: sensor->limit2_attr_name, ATTR_NAME_SIZE, |
927 | fmt: "%s%d_%s" , base_name, start + *num, limit2_name); |
928 | atk_init_attribute(attr: &sensor->limit2_attr, |
929 | name: sensor->limit2_attr_name, |
930 | show: atk_limit2_show); |
931 | |
932 | list_add(new: &sensor->list, head: &data->sensor_list); |
933 | (*num)++; |
934 | |
935 | return 1; |
936 | } |
937 | |
938 | static int atk_enumerate_old_hwmon(struct atk_data *data) |
939 | { |
940 | struct device *dev = &data->acpi_dev->dev; |
941 | struct acpi_buffer buf; |
942 | union acpi_object *pack; |
943 | acpi_status status; |
944 | int i, ret; |
945 | int count = 0; |
946 | |
947 | /* Voltages */ |
948 | buf.length = ACPI_ALLOCATE_BUFFER; |
949 | status = acpi_evaluate_object_typed(object: data->atk_handle, |
950 | METHOD_OLD_ENUM_VLT, NULL, return_buffer: &buf, ACPI_TYPE_PACKAGE); |
951 | if (status != AE_OK) { |
952 | dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n" , |
953 | acpi_format_exception(status)); |
954 | |
955 | return -ENODEV; |
956 | } |
957 | |
958 | pack = buf.pointer; |
959 | for (i = 1; i < pack->package.count; i++) { |
960 | union acpi_object *obj = &pack->package.elements[i]; |
961 | |
962 | ret = atk_add_sensor(data, obj); |
963 | if (ret > 0) |
964 | count++; |
965 | } |
966 | ACPI_FREE(buf.pointer); |
967 | |
968 | /* Temperatures */ |
969 | buf.length = ACPI_ALLOCATE_BUFFER; |
970 | status = acpi_evaluate_object_typed(object: data->atk_handle, |
971 | METHOD_OLD_ENUM_TMP, NULL, return_buffer: &buf, ACPI_TYPE_PACKAGE); |
972 | if (status != AE_OK) { |
973 | dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n" , |
974 | acpi_format_exception(status)); |
975 | |
976 | return -ENODEV; |
977 | } |
978 | |
979 | pack = buf.pointer; |
980 | for (i = 1; i < pack->package.count; i++) { |
981 | union acpi_object *obj = &pack->package.elements[i]; |
982 | |
983 | ret = atk_add_sensor(data, obj); |
984 | if (ret > 0) |
985 | count++; |
986 | } |
987 | ACPI_FREE(buf.pointer); |
988 | |
989 | /* Fans */ |
990 | buf.length = ACPI_ALLOCATE_BUFFER; |
991 | status = acpi_evaluate_object_typed(object: data->atk_handle, |
992 | METHOD_OLD_ENUM_FAN, NULL, return_buffer: &buf, ACPI_TYPE_PACKAGE); |
993 | if (status != AE_OK) { |
994 | dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n" , |
995 | acpi_format_exception(status)); |
996 | |
997 | return -ENODEV; |
998 | } |
999 | |
1000 | pack = buf.pointer; |
1001 | for (i = 1; i < pack->package.count; i++) { |
1002 | union acpi_object *obj = &pack->package.elements[i]; |
1003 | |
1004 | ret = atk_add_sensor(data, obj); |
1005 | if (ret > 0) |
1006 | count++; |
1007 | } |
1008 | ACPI_FREE(buf.pointer); |
1009 | |
1010 | return count; |
1011 | } |
1012 | |
1013 | static int atk_ec_present(struct atk_data *data) |
1014 | { |
1015 | struct device *dev = &data->acpi_dev->dev; |
1016 | union acpi_object *pack; |
1017 | union acpi_object *ec; |
1018 | int ret; |
1019 | int i; |
1020 | |
1021 | pack = atk_ggrp(data, ATK_MUX_MGMT); |
1022 | if (IS_ERR(ptr: pack)) { |
1023 | if (PTR_ERR(ptr: pack) == -ENOENT) { |
1024 | /* The MGMT class does not exists - that's ok */ |
1025 | dev_dbg(dev, "Class %#llx not found\n" , ATK_MUX_MGMT); |
1026 | return 0; |
1027 | } |
1028 | return PTR_ERR(ptr: pack); |
1029 | } |
1030 | |
1031 | /* Search the EC */ |
1032 | ec = NULL; |
1033 | for (i = 0; i < pack->package.count; i++) { |
1034 | union acpi_object *obj = &pack->package.elements[i]; |
1035 | union acpi_object *id; |
1036 | |
1037 | if (obj->type != ACPI_TYPE_PACKAGE) |
1038 | continue; |
1039 | |
1040 | id = &obj->package.elements[0]; |
1041 | if (id->type != ACPI_TYPE_INTEGER) |
1042 | continue; |
1043 | |
1044 | if (id->integer.value == ATK_EC_ID) { |
1045 | ec = obj; |
1046 | break; |
1047 | } |
1048 | } |
1049 | |
1050 | ret = (ec != NULL); |
1051 | if (!ret) |
1052 | /* The system has no EC */ |
1053 | dev_dbg(dev, "EC not found\n" ); |
1054 | |
1055 | ACPI_FREE(pack); |
1056 | return ret; |
1057 | } |
1058 | |
1059 | static int atk_ec_enabled(struct atk_data *data) |
1060 | { |
1061 | struct device *dev = &data->acpi_dev->dev; |
1062 | union acpi_object *obj; |
1063 | struct atk_acpi_ret_buffer *buf; |
1064 | int err; |
1065 | |
1066 | obj = atk_gitm(data, ATK_EC_ID); |
1067 | if (IS_ERR(ptr: obj)) { |
1068 | dev_err(dev, "Unable to query EC status\n" ); |
1069 | return PTR_ERR(ptr: obj); |
1070 | } |
1071 | buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; |
1072 | |
1073 | if (buf->flags == 0) { |
1074 | dev_err(dev, "Unable to query EC status\n" ); |
1075 | err = -EIO; |
1076 | } else { |
1077 | err = (buf->value != 0); |
1078 | dev_dbg(dev, "EC is %sabled\n" , |
1079 | err ? "en" : "dis" ); |
1080 | } |
1081 | |
1082 | ACPI_FREE(obj); |
1083 | return err; |
1084 | } |
1085 | |
1086 | static int atk_ec_ctl(struct atk_data *data, int enable) |
1087 | { |
1088 | struct device *dev = &data->acpi_dev->dev; |
1089 | union acpi_object *obj; |
1090 | struct atk_acpi_input_buf sitm; |
1091 | struct atk_acpi_ret_buffer *ec_ret; |
1092 | int err = 0; |
1093 | |
1094 | sitm.id = ATK_EC_ID; |
1095 | sitm.param1 = enable; |
1096 | sitm.param2 = 0; |
1097 | |
1098 | obj = atk_sitm(data, buf: &sitm); |
1099 | if (IS_ERR(ptr: obj)) { |
1100 | dev_err(dev, "Failed to %sable the EC\n" , |
1101 | enable ? "en" : "dis" ); |
1102 | return PTR_ERR(ptr: obj); |
1103 | } |
1104 | ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; |
1105 | if (ec_ret->flags == 0) { |
1106 | dev_err(dev, "Failed to %sable the EC\n" , |
1107 | enable ? "en" : "dis" ); |
1108 | err = -EIO; |
1109 | } else { |
1110 | dev_info(dev, "EC %sabled\n" , |
1111 | enable ? "en" : "dis" ); |
1112 | } |
1113 | |
1114 | ACPI_FREE(obj); |
1115 | return err; |
1116 | } |
1117 | |
1118 | static int atk_enumerate_new_hwmon(struct atk_data *data) |
1119 | { |
1120 | struct device *dev = &data->acpi_dev->dev; |
1121 | union acpi_object *pack; |
1122 | int err; |
1123 | int i; |
1124 | |
1125 | err = atk_ec_present(data); |
1126 | if (err < 0) |
1127 | return err; |
1128 | if (err) { |
1129 | err = atk_ec_enabled(data); |
1130 | if (err < 0) |
1131 | return err; |
1132 | /* If the EC was disabled we will disable it again on unload */ |
1133 | data->disable_ec = err; |
1134 | |
1135 | err = atk_ec_ctl(data, enable: 1); |
1136 | if (err) { |
1137 | data->disable_ec = false; |
1138 | return err; |
1139 | } |
1140 | } |
1141 | |
1142 | dev_dbg(dev, "Enumerating hwmon sensors\n" ); |
1143 | |
1144 | pack = atk_ggrp(data, ATK_MUX_HWMON); |
1145 | if (IS_ERR(ptr: pack)) |
1146 | return PTR_ERR(ptr: pack); |
1147 | |
1148 | for (i = 0; i < pack->package.count; i++) { |
1149 | union acpi_object *obj = &pack->package.elements[i]; |
1150 | |
1151 | atk_add_sensor(data, obj); |
1152 | } |
1153 | |
1154 | err = data->voltage_count + data->temperature_count + data->fan_count; |
1155 | |
1156 | ACPI_FREE(pack); |
1157 | return err; |
1158 | } |
1159 | |
1160 | static int atk_init_attribute_groups(struct atk_data *data) |
1161 | { |
1162 | struct device *dev = &data->acpi_dev->dev; |
1163 | struct atk_sensor_data *s; |
1164 | struct attribute **attrs; |
1165 | int i = 0; |
1166 | int len = (data->voltage_count + data->temperature_count |
1167 | + data->fan_count) * 4 + 1; |
1168 | |
1169 | attrs = devm_kcalloc(dev, n: len, size: sizeof(struct attribute *), GFP_KERNEL); |
1170 | if (!attrs) |
1171 | return -ENOMEM; |
1172 | |
1173 | list_for_each_entry(s, &data->sensor_list, list) { |
1174 | attrs[i++] = &s->input_attr.attr; |
1175 | attrs[i++] = &s->label_attr.attr; |
1176 | attrs[i++] = &s->limit1_attr.attr; |
1177 | attrs[i++] = &s->limit2_attr.attr; |
1178 | } |
1179 | |
1180 | data->attr_group.attrs = attrs; |
1181 | data->attr_groups[0] = &data->attr_group; |
1182 | |
1183 | return 0; |
1184 | } |
1185 | |
1186 | static int atk_register_hwmon(struct atk_data *data) |
1187 | { |
1188 | struct device *dev = &data->acpi_dev->dev; |
1189 | |
1190 | dev_dbg(dev, "registering hwmon device\n" ); |
1191 | data->hwmon_dev = hwmon_device_register_with_groups(dev, name: "atk0110" , |
1192 | drvdata: data, |
1193 | groups: data->attr_groups); |
1194 | |
1195 | return PTR_ERR_OR_ZERO(ptr: data->hwmon_dev); |
1196 | } |
1197 | |
1198 | static int atk_probe_if(struct atk_data *data) |
1199 | { |
1200 | struct device *dev = &data->acpi_dev->dev; |
1201 | acpi_handle ret; |
1202 | acpi_status status; |
1203 | int err = 0; |
1204 | |
1205 | /* RTMP: read temperature */ |
1206 | status = acpi_get_handle(parent: data->atk_handle, METHOD_OLD_READ_TMP, ret_handle: &ret); |
1207 | if (ACPI_SUCCESS(status)) |
1208 | data->rtmp_handle = ret; |
1209 | else |
1210 | dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n" , |
1211 | acpi_format_exception(status)); |
1212 | |
1213 | /* RVLT: read voltage */ |
1214 | status = acpi_get_handle(parent: data->atk_handle, METHOD_OLD_READ_VLT, ret_handle: &ret); |
1215 | if (ACPI_SUCCESS(status)) |
1216 | data->rvlt_handle = ret; |
1217 | else |
1218 | dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n" , |
1219 | acpi_format_exception(status)); |
1220 | |
1221 | /* RFAN: read fan status */ |
1222 | status = acpi_get_handle(parent: data->atk_handle, METHOD_OLD_READ_FAN, ret_handle: &ret); |
1223 | if (ACPI_SUCCESS(status)) |
1224 | data->rfan_handle = ret; |
1225 | else |
1226 | dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n" , |
1227 | acpi_format_exception(status)); |
1228 | |
1229 | /* Enumeration */ |
1230 | status = acpi_get_handle(parent: data->atk_handle, METHOD_ENUMERATE, ret_handle: &ret); |
1231 | if (ACPI_SUCCESS(status)) |
1232 | data->enumerate_handle = ret; |
1233 | else |
1234 | dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n" , |
1235 | acpi_format_exception(status)); |
1236 | |
1237 | /* De-multiplexer (read) */ |
1238 | status = acpi_get_handle(parent: data->atk_handle, METHOD_READ, ret_handle: &ret); |
1239 | if (ACPI_SUCCESS(status)) |
1240 | data->read_handle = ret; |
1241 | else |
1242 | dev_dbg(dev, "method " METHOD_READ " not found: %s\n" , |
1243 | acpi_format_exception(status)); |
1244 | |
1245 | /* De-multiplexer (write) */ |
1246 | status = acpi_get_handle(parent: data->atk_handle, METHOD_WRITE, ret_handle: &ret); |
1247 | if (ACPI_SUCCESS(status)) |
1248 | data->write_handle = ret; |
1249 | else |
1250 | dev_dbg(dev, "method " METHOD_WRITE " not found: %s\n" , |
1251 | acpi_format_exception(status)); |
1252 | |
1253 | /* |
1254 | * Check for hwmon methods: first check "old" style methods; note that |
1255 | * both may be present: in this case we stick to the old interface; |
1256 | * analysis of multiple DSDTs indicates that when both interfaces |
1257 | * are present the new one (GGRP/GITM) is not functional. |
1258 | */ |
1259 | if (new_if) |
1260 | dev_info(dev, "Overriding interface detection\n" ); |
1261 | if (data->rtmp_handle && |
1262 | data->rvlt_handle && data->rfan_handle && !new_if) |
1263 | data->old_interface = true; |
1264 | else if (data->enumerate_handle && data->read_handle && |
1265 | data->write_handle) |
1266 | data->old_interface = false; |
1267 | else |
1268 | err = -ENODEV; |
1269 | |
1270 | return err; |
1271 | } |
1272 | |
1273 | static int atk_add(struct acpi_device *device) |
1274 | { |
1275 | acpi_status ret; |
1276 | int err; |
1277 | struct acpi_buffer buf; |
1278 | union acpi_object *obj; |
1279 | struct atk_data *data; |
1280 | |
1281 | dev_dbg(&device->dev, "adding...\n" ); |
1282 | |
1283 | data = devm_kzalloc(dev: &device->dev, size: sizeof(*data), GFP_KERNEL); |
1284 | if (!data) |
1285 | return -ENOMEM; |
1286 | |
1287 | data->acpi_dev = device; |
1288 | data->atk_handle = device->handle; |
1289 | INIT_LIST_HEAD(list: &data->sensor_list); |
1290 | data->disable_ec = false; |
1291 | |
1292 | buf.length = ACPI_ALLOCATE_BUFFER; |
1293 | ret = acpi_evaluate_object_typed(object: data->atk_handle, BOARD_ID, NULL, |
1294 | return_buffer: &buf, ACPI_TYPE_PACKAGE); |
1295 | if (ret != AE_OK) { |
1296 | dev_dbg(&device->dev, "atk: method MBIF not found\n" ); |
1297 | } else { |
1298 | obj = buf.pointer; |
1299 | if (obj->package.count >= 2) { |
1300 | union acpi_object *id = &obj->package.elements[1]; |
1301 | if (id->type == ACPI_TYPE_STRING) |
1302 | dev_dbg(&device->dev, "board ID = %s\n" , |
1303 | id->string.pointer); |
1304 | } |
1305 | ACPI_FREE(buf.pointer); |
1306 | } |
1307 | |
1308 | err = atk_probe_if(data); |
1309 | if (err) { |
1310 | dev_err(&device->dev, "No usable hwmon interface detected\n" ); |
1311 | goto out; |
1312 | } |
1313 | |
1314 | if (data->old_interface) { |
1315 | dev_dbg(&device->dev, "Using old hwmon interface\n" ); |
1316 | err = atk_enumerate_old_hwmon(data); |
1317 | } else { |
1318 | dev_dbg(&device->dev, "Using new hwmon interface\n" ); |
1319 | err = atk_enumerate_new_hwmon(data); |
1320 | } |
1321 | if (err < 0) |
1322 | goto out; |
1323 | if (err == 0) { |
1324 | dev_info(&device->dev, |
1325 | "No usable sensor detected, bailing out\n" ); |
1326 | err = -ENODEV; |
1327 | goto out; |
1328 | } |
1329 | |
1330 | err = atk_init_attribute_groups(data); |
1331 | if (err) |
1332 | goto out; |
1333 | err = atk_register_hwmon(data); |
1334 | if (err) |
1335 | goto out; |
1336 | |
1337 | atk_debugfs_init(data); |
1338 | |
1339 | device->driver_data = data; |
1340 | return 0; |
1341 | out: |
1342 | if (data->disable_ec) |
1343 | atk_ec_ctl(data, enable: 0); |
1344 | return err; |
1345 | } |
1346 | |
1347 | static void atk_remove(struct acpi_device *device) |
1348 | { |
1349 | struct atk_data *data = device->driver_data; |
1350 | dev_dbg(&device->dev, "removing...\n" ); |
1351 | |
1352 | device->driver_data = NULL; |
1353 | |
1354 | atk_debugfs_cleanup(data); |
1355 | |
1356 | hwmon_device_unregister(dev: data->hwmon_dev); |
1357 | |
1358 | if (data->disable_ec) { |
1359 | if (atk_ec_ctl(data, enable: 0)) |
1360 | dev_err(&device->dev, "Failed to disable EC\n" ); |
1361 | } |
1362 | } |
1363 | |
1364 | static int __init atk0110_init(void) |
1365 | { |
1366 | int ret; |
1367 | |
1368 | /* Make sure it's safe to access the device through ACPI */ |
1369 | if (!acpi_resources_are_enforced()) { |
1370 | pr_err("Resources not safely usable due to acpi_enforce_resources kernel parameter\n" ); |
1371 | return -EBUSY; |
1372 | } |
1373 | |
1374 | if (dmi_check_system(list: atk_force_new_if)) |
1375 | new_if = true; |
1376 | |
1377 | ret = acpi_bus_register_driver(driver: &atk_driver); |
1378 | if (ret) |
1379 | pr_info("acpi_bus_register_driver failed: %d\n" , ret); |
1380 | |
1381 | return ret; |
1382 | } |
1383 | |
1384 | static void __exit atk0110_exit(void) |
1385 | { |
1386 | acpi_bus_unregister_driver(driver: &atk_driver); |
1387 | } |
1388 | |
1389 | module_init(atk0110_init); |
1390 | module_exit(atk0110_exit); |
1391 | |
1392 | MODULE_LICENSE("GPL" ); |
1393 | |