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1 | /* |
2 | * Copyright (C) 2007-2009 Luca Tettamanti <kronos.it@gmail.com> |
3 | * |
4 | * This file is released under the GPLv2 |
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 | |
18 | #include <acpi/acpi.h> |
19 | #include <acpi/acpixf.h> |
20 | #include <acpi/acpi_drivers.h> |
21 | #include <acpi/acpi_bus.h> |
22 | |
23 | |
24 | #define ATK_HID "ATK0110" |
25 | |
26 | static bool new_if; |
27 | module_param(new_if, bool, 0); |
28 | MODULE_PARM_DESC(new_if, "Override detection heuristic and force the use of the new ATK0110 interface"); |
29 | |
30 | static const struct dmi_system_id __initconst atk_force_new_if[] = { |
31 | { |
32 | /* Old interface has broken MCH temp monitoring */ |
33 | .ident = "Asus Sabertooth X58", |
34 | .matches = { |
35 | DMI_MATCH(DMI_BOARD_NAME, "SABERTOOTH X58") |
36 | } |
37 | }, { |
38 | /* Old interface reads the same sensor for fan0 and fan1 */ |
39 | .ident = "Asus M5A78L", |
40 | .matches = { |
41 | DMI_MATCH(DMI_BOARD_NAME, "M5A78L") |
42 | } |
43 | }, |
44 | { } |
45 | }; |
46 | |
47 | /* |
48 | * Minimum time between readings, enforced in order to avoid |
49 | * hogging the CPU. |
50 | */ |
51 | #define CACHE_TIME HZ |
52 | |
53 | #define BOARD_ID "MBIF" |
54 | #define METHOD_ENUMERATE "GGRP" |
55 | #define METHOD_READ "GITM" |
56 | #define METHOD_WRITE "SITM" |
57 | #define METHOD_OLD_READ_TMP "RTMP" |
58 | #define METHOD_OLD_READ_VLT "RVLT" |
59 | #define METHOD_OLD_READ_FAN "RFAN" |
60 | #define METHOD_OLD_ENUM_TMP "TSIF" |
61 | #define METHOD_OLD_ENUM_VLT "VSIF" |
62 | #define METHOD_OLD_ENUM_FAN "FSIF" |
63 | |
64 | #define ATK_MUX_HWMON 0x00000006ULL |
65 | #define ATK_MUX_MGMT 0x00000011ULL |
66 | |
67 | #define ATK_CLASS_MASK 0xff000000ULL |
68 | #define ATK_CLASS_FREQ_CTL 0x03000000ULL |
69 | #define ATK_CLASS_FAN_CTL 0x04000000ULL |
70 | #define ATK_CLASS_HWMON 0x06000000ULL |
71 | #define ATK_CLASS_MGMT 0x11000000ULL |
72 | |
73 | #define ATK_TYPE_MASK 0x00ff0000ULL |
74 | #define HWMON_TYPE_VOLT 0x00020000ULL |
75 | #define HWMON_TYPE_TEMP 0x00030000ULL |
76 | #define HWMON_TYPE_FAN 0x00040000ULL |
77 | |
78 | #define ATK_ELEMENT_ID_MASK 0x0000ffffULL |
79 | |
80 | #define ATK_EC_ID 0x11060004ULL |
81 | |
82 | enum atk_pack_member { |
83 | HWMON_PACK_FLAGS, |
84 | HWMON_PACK_NAME, |
85 | HWMON_PACK_LIMIT1, |
86 | HWMON_PACK_LIMIT2, |
87 | HWMON_PACK_ENABLE |
88 | }; |
89 | |
90 | /* New package format */ |
91 | #define _HWMON_NEW_PACK_SIZE 7 |
92 | #define _HWMON_NEW_PACK_FLAGS 0 |
93 | #define _HWMON_NEW_PACK_NAME 1 |
94 | #define _HWMON_NEW_PACK_UNK1 2 |
95 | #define _HWMON_NEW_PACK_UNK2 3 |
96 | #define _HWMON_NEW_PACK_LIMIT1 4 |
97 | #define _HWMON_NEW_PACK_LIMIT2 5 |
98 | #define _HWMON_NEW_PACK_ENABLE 6 |
99 | |
100 | /* Old package format */ |
101 | #define _HWMON_OLD_PACK_SIZE 5 |
102 | #define _HWMON_OLD_PACK_FLAGS 0 |
103 | #define _HWMON_OLD_PACK_NAME 1 |
104 | #define _HWMON_OLD_PACK_LIMIT1 2 |
105 | #define _HWMON_OLD_PACK_LIMIT2 3 |
106 | #define _HWMON_OLD_PACK_ENABLE 4 |
107 | |
108 | |
109 | struct atk_data { |
110 | struct device *hwmon_dev; |
111 | acpi_handle atk_handle; |
112 | struct acpi_device *acpi_dev; |
113 | |
114 | bool old_interface; |
115 | |
116 | /* old interface */ |
117 | acpi_handle rtmp_handle; |
118 | acpi_handle rvlt_handle; |
119 | acpi_handle rfan_handle; |
120 | /* new inteface */ |
121 | acpi_handle enumerate_handle; |
122 | acpi_handle read_handle; |
123 | acpi_handle write_handle; |
124 | |
125 | bool disable_ec; |
126 | |
127 | int voltage_count; |
128 | int temperature_count; |
129 | int fan_count; |
130 | struct list_head sensor_list; |
131 | |
132 | struct { |
133 | struct dentry *root; |
134 | u32 id; |
135 | } debugfs; |
136 | }; |
137 | |
138 | |
139 | typedef ssize_t (*sysfs_show_func)(struct device *dev, |
140 | struct device_attribute *attr, char *buf); |
141 | |
142 | static const struct acpi_device_id atk_ids[] = { |
143 | {ATK_HID, 0}, |
144 | {"", 0}, |
145 | }; |
146 | MODULE_DEVICE_TABLE(acpi, atk_ids); |
147 | |
148 | #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */ |
149 | |
150 | struct atk_sensor_data { |
151 | struct list_head list; |
152 | struct atk_data *data; |
153 | struct device_attribute label_attr; |
154 | struct device_attribute input_attr; |
155 | struct device_attribute limit1_attr; |
156 | struct device_attribute limit2_attr; |
157 | char label_attr_name[ATTR_NAME_SIZE]; |
158 | char input_attr_name[ATTR_NAME_SIZE]; |
159 | char limit1_attr_name[ATTR_NAME_SIZE]; |
160 | char limit2_attr_name[ATTR_NAME_SIZE]; |
161 | u64 id; |
162 | u64 type; |
163 | u64 limit1; |
164 | u64 limit2; |
165 | u64 cached_value; |
166 | unsigned long last_updated; /* in jiffies */ |
167 | bool is_valid; |
168 | char const *acpi_name; |
169 | }; |
170 | |
171 | /* |
172 | * Return buffer format: |
173 | * [0-3] "value" is valid flag |
174 | * [4-7] value |
175 | * [8- ] unknown stuff on newer mobos |
176 | */ |
177 | struct atk_acpi_ret_buffer { |
178 | u32 flags; |
179 | u32 value; |
180 | u8 data[]; |
181 | }; |
182 | |
183 | /* Input buffer used for GITM and SITM methods */ |
184 | struct atk_acpi_input_buf { |
185 | u32 id; |
186 | u32 param1; |
187 | u32 param2; |
188 | }; |
189 | |
190 | static int atk_add(struct acpi_device *device); |
191 | static int atk_remove(struct acpi_device *device, int type); |
192 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj); |
193 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value); |
194 | static void atk_free_sensors(struct atk_data *data); |
195 | |
196 | static struct acpi_driver atk_driver = { |
197 | .name = ATK_HID, |
198 | .class = "hwmon", |
199 | .ids = atk_ids, |
200 | .ops = { |
201 | .add = atk_add, |
202 | .remove = atk_remove, |
203 | }, |
204 | }; |
205 | |
206 | #define input_to_atk_sensor(attr) \ |
207 | container_of(attr, struct atk_sensor_data, input_attr) |
208 | |
209 | #define label_to_atk_sensor(attr) \ |
210 | container_of(attr, struct atk_sensor_data, label_attr) |
211 | |
212 | #define limit1_to_atk_sensor(attr) \ |
213 | container_of(attr, struct atk_sensor_data, limit1_attr) |
214 | |
215 | #define limit2_to_atk_sensor(attr) \ |
216 | container_of(attr, struct atk_sensor_data, limit2_attr) |
217 | |
218 | static ssize_t atk_input_show(struct device *dev, |
219 | struct device_attribute *attr, char *buf) |
220 | { |
221 | struct atk_sensor_data *s = input_to_atk_sensor(attr); |
222 | u64 value; |
223 | int err; |
224 | |
225 | err = atk_read_value(s, &value); |
226 | if (err) |
227 | return err; |
228 | |
229 | if (s->type == HWMON_TYPE_TEMP) |
230 | /* ACPI returns decidegree */ |
231 | value *= 100; |
232 | |
233 | return sprintf(buf, "%llu\n", value); |
234 | } |
235 | |
236 | static ssize_t atk_label_show(struct device *dev, |
237 | struct device_attribute *attr, char *buf) |
238 | { |
239 | struct atk_sensor_data *s = label_to_atk_sensor(attr); |
240 | |
241 | return sprintf(buf, "%s\n", s->acpi_name); |
242 | } |
243 | |
244 | static ssize_t atk_limit1_show(struct device *dev, |
245 | struct device_attribute *attr, char *buf) |
246 | { |
247 | struct atk_sensor_data *s = limit1_to_atk_sensor(attr); |
248 | u64 value = s->limit1; |
249 | |
250 | if (s->type == HWMON_TYPE_TEMP) |
251 | value *= 100; |
252 | |
253 | return sprintf(buf, "%lld\n", value); |
254 | } |
255 | |
256 | static ssize_t atk_limit2_show(struct device *dev, |
257 | struct device_attribute *attr, char *buf) |
258 | { |
259 | struct atk_sensor_data *s = limit2_to_atk_sensor(attr); |
260 | u64 value = s->limit2; |
261 | |
262 | if (s->type == HWMON_TYPE_TEMP) |
263 | value *= 100; |
264 | |
265 | return sprintf(buf, "%lld\n", value); |
266 | } |
267 | |
268 | static ssize_t atk_name_show(struct device *dev, |
269 | struct device_attribute *attr, char *buf) |
270 | { |
271 | return sprintf(buf, "atk0110\n"); |
272 | } |
273 | static struct device_attribute atk_name_attr = |
274 | __ATTR(name, 0444, atk_name_show, NULL); |
275 | |
276 | static void atk_init_attribute(struct device_attribute *attr, char *name, |
277 | sysfs_show_func show) |
278 | { |
279 | sysfs_attr_init(&attr->attr); |
280 | attr->attr.name = name; |
281 | attr->attr.mode = 0444; |
282 | attr->show = show; |
283 | attr->store = NULL; |
284 | } |
285 | |
286 | |
287 | static union acpi_object *atk_get_pack_member(struct atk_data *data, |
288 | union acpi_object *pack, |
289 | enum atk_pack_member m) |
290 | { |
291 | bool old_if = data->old_interface; |
292 | int offset; |
293 | |
294 | switch (m) { |
295 | case HWMON_PACK_FLAGS: |
296 | offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS; |
297 | break; |
298 | case HWMON_PACK_NAME: |
299 | offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME; |
300 | break; |
301 | case HWMON_PACK_LIMIT1: |
302 | offset = old_if ? _HWMON_OLD_PACK_LIMIT1 : |
303 | _HWMON_NEW_PACK_LIMIT1; |
304 | break; |
305 | case HWMON_PACK_LIMIT2: |
306 | offset = old_if ? _HWMON_OLD_PACK_LIMIT2 : |
307 | _HWMON_NEW_PACK_LIMIT2; |
308 | break; |
309 | case HWMON_PACK_ENABLE: |
310 | offset = old_if ? _HWMON_OLD_PACK_ENABLE : |
311 | _HWMON_NEW_PACK_ENABLE; |
312 | break; |
313 | default: |
314 | return NULL; |
315 | } |
316 | |
317 | return &pack->package.elements[offset]; |
318 | } |
319 | |
320 | |
321 | /* |
322 | * New package format is: |
323 | * - flag (int) |
324 | * class - used for de-muxing the request to the correct GITn |
325 | * type (volt, temp, fan) |
326 | * sensor id | |
327 | * sensor id - used for de-muxing the request _inside_ the GITn |
328 | * - name (str) |
329 | * - unknown (int) |
330 | * - unknown (int) |
331 | * - limit1 (int) |
332 | * - limit2 (int) |
333 | * - enable (int) |
334 | * |
335 | * The old package has the same format but it's missing the two unknown fields. |
336 | */ |
337 | static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj) |
338 | { |
339 | struct device *dev = &data->acpi_dev->dev; |
340 | union acpi_object *tmp; |
341 | bool old_if = data->old_interface; |
342 | int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE : |
343 | _HWMON_NEW_PACK_SIZE; |
344 | |
345 | if (obj->type != ACPI_TYPE_PACKAGE) { |
346 | dev_warn(dev, "Invalid type: %d\n", obj->type); |
347 | return -EINVAL; |
348 | } |
349 | |
350 | if (obj->package.count != expected_size) { |
351 | dev_warn(dev, "Invalid package size: %d, expected: %d\n", |
352 | obj->package.count, expected_size); |
353 | return -EINVAL; |
354 | } |
355 | |
356 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); |
357 | if (tmp->type != ACPI_TYPE_INTEGER) { |
358 | dev_warn(dev, "Invalid type (flag): %d\n", tmp->type); |
359 | return -EINVAL; |
360 | } |
361 | |
362 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME); |
363 | if (tmp->type != ACPI_TYPE_STRING) { |
364 | dev_warn(dev, "Invalid type (name): %d\n", tmp->type); |
365 | return -EINVAL; |
366 | } |
367 | |
368 | /* Don't check... we don't know what they're useful for anyway */ |
369 | #if 0 |
370 | tmp = &obj->package.elements[HWMON_PACK_UNK1]; |
371 | if (tmp->type != ACPI_TYPE_INTEGER) { |
372 | dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type); |
373 | return -EINVAL; |
374 | } |
375 | |
376 | tmp = &obj->package.elements[HWMON_PACK_UNK2]; |
377 | if (tmp->type != ACPI_TYPE_INTEGER) { |
378 | dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type); |
379 | return -EINVAL; |
380 | } |
381 | #endif |
382 | |
383 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); |
384 | if (tmp->type != ACPI_TYPE_INTEGER) { |
385 | dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type); |
386 | return -EINVAL; |
387 | } |
388 | |
389 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); |
390 | if (tmp->type != ACPI_TYPE_INTEGER) { |
391 | dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type); |
392 | return -EINVAL; |
393 | } |
394 | |
395 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); |
396 | if (tmp->type != ACPI_TYPE_INTEGER) { |
397 | dev_warn(dev, "Invalid type (enable): %d\n", tmp->type); |
398 | return -EINVAL; |
399 | } |
400 | |
401 | atk_print_sensor(data, obj); |
402 | |
403 | return 0; |
404 | } |
405 | |
406 | #ifdef DEBUG |
407 | static char const *atk_sensor_type(union acpi_object *flags) |
408 | { |
409 | u64 type = flags->integer.value & ATK_TYPE_MASK; |
410 | char const *what; |
411 | |
412 | switch (type) { |
413 | case HWMON_TYPE_VOLT: |
414 | what = "voltage"; |
415 | break; |
416 | case HWMON_TYPE_TEMP: |
417 | what = "temperature"; |
418 | break; |
419 | case HWMON_TYPE_FAN: |
420 | what = "fan"; |
421 | break; |
422 | default: |
423 | what = "unknown"; |
424 | break; |
425 | } |
426 | |
427 | return what; |
428 | } |
429 | #endif |
430 | |
431 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj) |
432 | { |
433 | #ifdef DEBUG |
434 | struct device *dev = &data->acpi_dev->dev; |
435 | union acpi_object *flags; |
436 | union acpi_object *name; |
437 | union acpi_object *limit1; |
438 | union acpi_object *limit2; |
439 | union acpi_object *enable; |
440 | char const *what; |
441 | |
442 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); |
443 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); |
444 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); |
445 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); |
446 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); |
447 | |
448 | what = atk_sensor_type(flags); |
449 | |
450 | dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what, |
451 | flags->integer.value, |
452 | name->string.pointer, |
453 | limit1->integer.value, limit2->integer.value, |
454 | enable->integer.value ? "enabled" : "disabled"); |
455 | #endif |
456 | } |
457 | |
458 | static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value) |
459 | { |
460 | struct atk_data *data = sensor->data; |
461 | struct device *dev = &data->acpi_dev->dev; |
462 | struct acpi_object_list params; |
463 | union acpi_object id; |
464 | acpi_status status; |
465 | acpi_handle method; |
466 | |
467 | switch (sensor->type) { |
468 | case HWMON_TYPE_VOLT: |
469 | method = data->rvlt_handle; |
470 | break; |
471 | case HWMON_TYPE_TEMP: |
472 | method = data->rtmp_handle; |
473 | break; |
474 | case HWMON_TYPE_FAN: |
475 | method = data->rfan_handle; |
476 | break; |
477 | default: |
478 | return -EINVAL; |
479 | } |
480 | |
481 | id.type = ACPI_TYPE_INTEGER; |
482 | id.integer.value = sensor->id; |
483 | |
484 | params.count = 1; |
485 | params.pointer = &id; |
486 | |
487 | status = acpi_evaluate_integer(method, NULL, ¶ms, value); |
488 | if (status != AE_OK) { |
489 | dev_warn(dev, "%s: ACPI exception: %s\n", __func__, |
490 | acpi_format_exception(status)); |
491 | return -EIO; |
492 | } |
493 | |
494 | return 0; |
495 | } |
496 | |
497 | static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux) |
498 | { |
499 | struct device *dev = &data->acpi_dev->dev; |
500 | struct acpi_buffer buf; |
501 | acpi_status ret; |
502 | struct acpi_object_list params; |
503 | union acpi_object id; |
504 | union acpi_object *pack; |
505 | |
506 | id.type = ACPI_TYPE_INTEGER; |
507 | id.integer.value = mux; |
508 | params.count = 1; |
509 | params.pointer = &id; |
510 | |
511 | buf.length = ACPI_ALLOCATE_BUFFER; |
512 | ret = acpi_evaluate_object(data->enumerate_handle, NULL, ¶ms, &buf); |
513 | if (ret != AE_OK) { |
514 | dev_err(dev, "GGRP[%#x] ACPI exception: %s\n", mux, |
515 | acpi_format_exception(ret)); |
516 | return ERR_PTR(-EIO); |
517 | } |
518 | pack = buf.pointer; |
519 | if (pack->type != ACPI_TYPE_PACKAGE) { |
520 | /* Execution was successful, but the id was not found */ |
521 | ACPI_FREE(pack); |
522 | return ERR_PTR(-ENOENT); |
523 | } |
524 | |
525 | if (pack->package.count < 1) { |
526 | dev_err(dev, "GGRP[%#x] package is too small\n", mux); |
527 | ACPI_FREE(pack); |
528 | return ERR_PTR(-EIO); |
529 | } |
530 | return pack; |
531 | } |
532 | |
533 | static union acpi_object *atk_gitm(struct atk_data *data, u64 id) |
534 | { |
535 | struct device *dev = &data->acpi_dev->dev; |
536 | struct atk_acpi_input_buf buf; |
537 | union acpi_object tmp; |
538 | struct acpi_object_list params; |
539 | struct acpi_buffer ret; |
540 | union acpi_object *obj; |
541 | acpi_status status; |
542 | |
543 | buf.id = id; |
544 | buf.param1 = 0; |
545 | buf.param2 = 0; |
546 | |
547 | tmp.type = ACPI_TYPE_BUFFER; |
548 | tmp.buffer.pointer = (u8 *)&buf; |
549 | tmp.buffer.length = sizeof(buf); |
550 | |
551 | params.count = 1; |
552 | params.pointer = (void *)&tmp; |
553 | |
554 | ret.length = ACPI_ALLOCATE_BUFFER; |
555 | status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms, |
556 | &ret, ACPI_TYPE_BUFFER); |
557 | if (status != AE_OK) { |
558 | dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id, |
559 | acpi_format_exception(status)); |
560 | return ERR_PTR(-EIO); |
561 | } |
562 | obj = ret.pointer; |
563 | |
564 | /* Sanity check */ |
565 | if (obj->buffer.length < 8) { |
566 | dev_warn(dev, "Unexpected ASBF length: %u\n", |
567 | obj->buffer.length); |
568 | ACPI_FREE(obj); |
569 | return ERR_PTR(-EIO); |
570 | } |
571 | return obj; |
572 | } |
573 | |
574 | static union acpi_object *atk_sitm(struct atk_data *data, |
575 | struct atk_acpi_input_buf *buf) |
576 | { |
577 | struct device *dev = &data->acpi_dev->dev; |
578 | struct acpi_object_list params; |
579 | union acpi_object tmp; |
580 | struct acpi_buffer ret; |
581 | union acpi_object *obj; |
582 | acpi_status status; |
583 | |
584 | tmp.type = ACPI_TYPE_BUFFER; |
585 | tmp.buffer.pointer = (u8 *)buf; |
586 | tmp.buffer.length = sizeof(*buf); |
587 | |
588 | params.count = 1; |
589 | params.pointer = &tmp; |
590 | |
591 | ret.length = ACPI_ALLOCATE_BUFFER; |
592 | status = acpi_evaluate_object_typed(data->write_handle, NULL, ¶ms, |
593 | &ret, ACPI_TYPE_BUFFER); |
594 | if (status != AE_OK) { |
595 | dev_warn(dev, "SITM[%#x] ACPI exception: %s\n", buf->id, |
596 | acpi_format_exception(status)); |
597 | return ERR_PTR(-EIO); |
598 | } |
599 | obj = ret.pointer; |
600 | |
601 | /* Sanity check */ |
602 | if (obj->buffer.length < 8) { |
603 | dev_warn(dev, "Unexpected ASBF length: %u\n", |
604 | obj->buffer.length); |
605 | ACPI_FREE(obj); |
606 | return ERR_PTR(-EIO); |
607 | } |
608 | return obj; |
609 | } |
610 | |
611 | static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value) |
612 | { |
613 | struct atk_data *data = sensor->data; |
614 | struct device *dev = &data->acpi_dev->dev; |
615 | union acpi_object *obj; |
616 | struct atk_acpi_ret_buffer *buf; |
617 | int err = 0; |
618 | |
619 | obj = atk_gitm(data, sensor->id); |
620 | if (IS_ERR(obj)) |
621 | return PTR_ERR(obj); |
622 | |
623 | buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; |
624 | if (buf->flags == 0) { |
625 | /* |
626 | * The reading is not valid, possible causes: |
627 | * - sensor failure |
628 | * - enumeration was FUBAR (and we didn't notice) |
629 | */ |
630 | dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id); |
631 | err = -EIO; |
632 | goto out; |
633 | } |
634 | |
635 | *value = buf->value; |
636 | out: |
637 | ACPI_FREE(obj); |
638 | return err; |
639 | } |
640 | |
641 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value) |
642 | { |
643 | int err; |
644 | |
645 | if (!sensor->is_valid || |
646 | time_after(jiffies, sensor->last_updated + CACHE_TIME)) { |
647 | if (sensor->data->old_interface) |
648 | err = atk_read_value_old(sensor, value); |
649 | else |
650 | err = atk_read_value_new(sensor, value); |
651 | |
652 | sensor->is_valid = true; |
653 | sensor->last_updated = jiffies; |
654 | sensor->cached_value = *value; |
655 | } else { |
656 | *value = sensor->cached_value; |
657 | err = 0; |
658 | } |
659 | |
660 | return err; |
661 | } |
662 | |
663 | #ifdef CONFIG_DEBUG_FS |
664 | static int atk_debugfs_gitm_get(void *p, u64 *val) |
665 | { |
666 | struct atk_data *data = p; |
667 | union acpi_object *ret; |
668 | struct atk_acpi_ret_buffer *buf; |
669 | int err = 0; |
670 | |
671 | if (!data->read_handle) |
672 | return -ENODEV; |
673 | |
674 | if (!data->debugfs.id) |
675 | return -EINVAL; |
676 | |
677 | ret = atk_gitm(data, data->debugfs.id); |
678 | if (IS_ERR(ret)) |
679 | return PTR_ERR(ret); |
680 | |
681 | buf = (struct atk_acpi_ret_buffer *)ret->buffer.pointer; |
682 | if (buf->flags) |
683 | *val = buf->value; |
684 | else |
685 | err = -EIO; |
686 | |
687 | ACPI_FREE(ret); |
688 | return err; |
689 | } |
690 | |
691 | DEFINE_SIMPLE_ATTRIBUTE(atk_debugfs_gitm, |
692 | atk_debugfs_gitm_get, |
693 | NULL, |
694 | "0x%08llx\n") |
695 | |
696 | static int atk_acpi_print(char *buf, size_t sz, union acpi_object *obj) |
697 | { |
698 | int ret = 0; |
699 | |
700 | switch (obj->type) { |
701 | case ACPI_TYPE_INTEGER: |
702 | ret = snprintf(buf, sz, "0x%08llx\n", obj->integer.value); |
703 | break; |
704 | case ACPI_TYPE_STRING: |
705 | ret = snprintf(buf, sz, "%s\n", obj->string.pointer); |
706 | break; |
707 | } |
708 | |
709 | return ret; |
710 | } |
711 | |
712 | static void atk_pack_print(char *buf, size_t sz, union acpi_object *pack) |
713 | { |
714 | int ret; |
715 | int i; |
716 | |
717 | for (i = 0; i < pack->package.count; i++) { |
718 | union acpi_object *obj = &pack->package.elements[i]; |
719 | |
720 | ret = atk_acpi_print(buf, sz, obj); |
721 | if (ret >= sz) |
722 | break; |
723 | buf += ret; |
724 | sz -= ret; |
725 | } |
726 | } |
727 | |
728 | static int atk_debugfs_ggrp_open(struct inode *inode, struct file *file) |
729 | { |
730 | struct atk_data *data = inode->i_private; |
731 | char *buf = NULL; |
732 | union acpi_object *ret; |
733 | u8 cls; |
734 | int i; |
735 | |
736 | if (!data->enumerate_handle) |
737 | return -ENODEV; |
738 | if (!data->debugfs.id) |
739 | return -EINVAL; |
740 | |
741 | cls = (data->debugfs.id & 0xff000000) >> 24; |
742 | ret = atk_ggrp(data, cls); |
743 | if (IS_ERR(ret)) |
744 | return PTR_ERR(ret); |
745 | |
746 | for (i = 0; i < ret->package.count; i++) { |
747 | union acpi_object *pack = &ret->package.elements[i]; |
748 | union acpi_object *id; |
749 | |
750 | if (pack->type != ACPI_TYPE_PACKAGE) |
751 | continue; |
752 | if (!pack->package.count) |
753 | continue; |
754 | id = &pack->package.elements[0]; |
755 | if (id->integer.value == data->debugfs.id) { |
756 | /* Print the package */ |
757 | buf = kzalloc(512, GFP_KERNEL); |
758 | if (!buf) { |
759 | ACPI_FREE(ret); |
760 | return -ENOMEM; |
761 | } |
762 | atk_pack_print(buf, 512, pack); |
763 | break; |
764 | } |
765 | } |
766 | ACPI_FREE(ret); |
767 | |
768 | if (!buf) |
769 | return -EINVAL; |
770 | |
771 | file->private_data = buf; |
772 | |
773 | return nonseekable_open(inode, file); |
774 | } |
775 | |
776 | static ssize_t atk_debugfs_ggrp_read(struct file *file, char __user *buf, |
777 | size_t count, loff_t *pos) |
778 | { |
779 | char *str = file->private_data; |
780 | size_t len = strlen(str); |
781 | |
782 | return simple_read_from_buffer(buf, count, pos, str, len); |
783 | } |
784 | |
785 | static int atk_debugfs_ggrp_release(struct inode *inode, struct file *file) |
786 | { |
787 | kfree(file->private_data); |
788 | return 0; |
789 | } |
790 | |
791 | static const struct file_operations atk_debugfs_ggrp_fops = { |
792 | .read = atk_debugfs_ggrp_read, |
793 | .open = atk_debugfs_ggrp_open, |
794 | .release = atk_debugfs_ggrp_release, |
795 | .llseek = no_llseek, |
796 | }; |
797 | |
798 | static void atk_debugfs_init(struct atk_data *data) |
799 | { |
800 | struct dentry *d; |
801 | struct dentry *f; |
802 | |
803 | data->debugfs.id = 0; |
804 | |
805 | d = debugfs_create_dir("asus_atk0110", NULL); |
806 | if (!d || IS_ERR(d)) |
807 | return; |
808 | |
809 | f = debugfs_create_x32("id", S_IRUSR | S_IWUSR, d, &data->debugfs.id); |
810 | if (!f || IS_ERR(f)) |
811 | goto cleanup; |
812 | |
813 | f = debugfs_create_file("gitm", S_IRUSR, d, data, |
814 | &atk_debugfs_gitm); |
815 | if (!f || IS_ERR(f)) |
816 | goto cleanup; |
817 | |
818 | f = debugfs_create_file("ggrp", S_IRUSR, d, data, |
819 | &atk_debugfs_ggrp_fops); |
820 | if (!f || IS_ERR(f)) |
821 | goto cleanup; |
822 | |
823 | data->debugfs.root = d; |
824 | |
825 | return; |
826 | cleanup: |
827 | debugfs_remove_recursive(d); |
828 | } |
829 | |
830 | static void atk_debugfs_cleanup(struct atk_data *data) |
831 | { |
832 | debugfs_remove_recursive(data->debugfs.root); |
833 | } |
834 | |
835 | #else /* CONFIG_DEBUG_FS */ |
836 | |
837 | static void atk_debugfs_init(struct atk_data *data) |
838 | { |
839 | } |
840 | |
841 | static void atk_debugfs_cleanup(struct atk_data *data) |
842 | { |
843 | } |
844 | #endif |
845 | |
846 | static int atk_add_sensor(struct atk_data *data, union acpi_object *obj) |
847 | { |
848 | struct device *dev = &data->acpi_dev->dev; |
849 | union acpi_object *flags; |
850 | union acpi_object *name; |
851 | union acpi_object *limit1; |
852 | union acpi_object *limit2; |
853 | union acpi_object *enable; |
854 | struct atk_sensor_data *sensor; |
855 | char const *base_name; |
856 | char const *limit1_name; |
857 | char const *limit2_name; |
858 | u64 type; |
859 | int err; |
860 | int *num; |
861 | int start; |
862 | |
863 | if (obj->type != ACPI_TYPE_PACKAGE) { |
864 | /* wft is this? */ |
865 | dev_warn(dev, "Unknown type for ACPI object: (%d)\n", |
866 | obj->type); |
867 | return -EINVAL; |
868 | } |
869 | |
870 | err = validate_hwmon_pack(data, obj); |
871 | if (err) |
872 | return err; |
873 | |
874 | /* Ok, we have a valid hwmon package */ |
875 | type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value |
876 | & ATK_TYPE_MASK; |
877 | |
878 | switch (type) { |
879 | case HWMON_TYPE_VOLT: |
880 | base_name = "in"; |
881 | limit1_name = "min"; |
882 | limit2_name = "max"; |
883 | num = &data->voltage_count; |
884 | start = 0; |
885 | break; |
886 | case HWMON_TYPE_TEMP: |
887 | base_name = "temp"; |
888 | limit1_name = "max"; |
889 | limit2_name = "crit"; |
890 | num = &data->temperature_count; |
891 | start = 1; |
892 | break; |
893 | case HWMON_TYPE_FAN: |
894 | base_name = "fan"; |
895 | limit1_name = "min"; |
896 | limit2_name = "max"; |
897 | num = &data->fan_count; |
898 | start = 1; |
899 | break; |
900 | default: |
901 | dev_warn(dev, "Unknown sensor type: %#llx\n", type); |
902 | return -EINVAL; |
903 | } |
904 | |
905 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); |
906 | if (!enable->integer.value) |
907 | /* sensor is disabled */ |
908 | return 0; |
909 | |
910 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); |
911 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); |
912 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); |
913 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); |
914 | |
915 | sensor = kzalloc(sizeof(*sensor), GFP_KERNEL); |
916 | if (!sensor) |
917 | return -ENOMEM; |
918 | |
919 | sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL); |
920 | if (!sensor->acpi_name) { |
921 | err = -ENOMEM; |
922 | goto out; |
923 | } |
924 | |
925 | INIT_LIST_HEAD(&sensor->list); |
926 | sensor->type = type; |
927 | sensor->data = data; |
928 | sensor->id = flags->integer.value; |
929 | sensor->limit1 = limit1->integer.value; |
930 | if (data->old_interface) |
931 | sensor->limit2 = limit2->integer.value; |
932 | else |
933 | /* The upper limit is expressed as delta from lower limit */ |
934 | sensor->limit2 = sensor->limit1 + limit2->integer.value; |
935 | |
936 | snprintf(sensor->input_attr_name, ATTR_NAME_SIZE, |
937 | "%s%d_input", base_name, start + *num); |
938 | atk_init_attribute(&sensor->input_attr, |
939 | sensor->input_attr_name, |
940 | atk_input_show); |
941 | |
942 | snprintf(sensor->label_attr_name, ATTR_NAME_SIZE, |
943 | "%s%d_label", base_name, start + *num); |
944 | atk_init_attribute(&sensor->label_attr, |
945 | sensor->label_attr_name, |
946 | atk_label_show); |
947 | |
948 | snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE, |
949 | "%s%d_%s", base_name, start + *num, limit1_name); |
950 | atk_init_attribute(&sensor->limit1_attr, |
951 | sensor->limit1_attr_name, |
952 | atk_limit1_show); |
953 | |
954 | snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE, |
955 | "%s%d_%s", base_name, start + *num, limit2_name); |
956 | atk_init_attribute(&sensor->limit2_attr, |
957 | sensor->limit2_attr_name, |
958 | atk_limit2_show); |
959 | |
960 | list_add(&sensor->list, &data->sensor_list); |
961 | (*num)++; |
962 | |
963 | return 1; |
964 | out: |
965 | kfree(sensor->acpi_name); |
966 | kfree(sensor); |
967 | return err; |
968 | } |
969 | |
970 | static int atk_enumerate_old_hwmon(struct atk_data *data) |
971 | { |
972 | struct device *dev = &data->acpi_dev->dev; |
973 | struct acpi_buffer buf; |
974 | union acpi_object *pack; |
975 | acpi_status status; |
976 | int i, ret; |
977 | int count = 0; |
978 | |
979 | /* Voltages */ |
980 | buf.length = ACPI_ALLOCATE_BUFFER; |
981 | status = acpi_evaluate_object_typed(data->atk_handle, |
982 | METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE); |
983 | if (status != AE_OK) { |
984 | dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n", |
985 | acpi_format_exception(status)); |
986 | |
987 | return -ENODEV; |
988 | } |
989 | |
990 | pack = buf.pointer; |
991 | for (i = 1; i < pack->package.count; i++) { |
992 | union acpi_object *obj = &pack->package.elements[i]; |
993 | |
994 | ret = atk_add_sensor(data, obj); |
995 | if (ret > 0) |
996 | count++; |
997 | } |
998 | ACPI_FREE(buf.pointer); |
999 | |
1000 | /* Temperatures */ |
1001 | buf.length = ACPI_ALLOCATE_BUFFER; |
1002 | status = acpi_evaluate_object_typed(data->atk_handle, |
1003 | METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE); |
1004 | if (status != AE_OK) { |
1005 | dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n", |
1006 | acpi_format_exception(status)); |
1007 | |
1008 | ret = -ENODEV; |
1009 | goto cleanup; |
1010 | } |
1011 | |
1012 | pack = buf.pointer; |
1013 | for (i = 1; i < pack->package.count; i++) { |
1014 | union acpi_object *obj = &pack->package.elements[i]; |
1015 | |
1016 | ret = atk_add_sensor(data, obj); |
1017 | if (ret > 0) |
1018 | count++; |
1019 | } |
1020 | ACPI_FREE(buf.pointer); |
1021 | |
1022 | /* Fans */ |
1023 | buf.length = ACPI_ALLOCATE_BUFFER; |
1024 | status = acpi_evaluate_object_typed(data->atk_handle, |
1025 | METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE); |
1026 | if (status != AE_OK) { |
1027 | dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n", |
1028 | acpi_format_exception(status)); |
1029 | |
1030 | ret = -ENODEV; |
1031 | goto cleanup; |
1032 | } |
1033 | |
1034 | pack = buf.pointer; |
1035 | for (i = 1; i < pack->package.count; i++) { |
1036 | union acpi_object *obj = &pack->package.elements[i]; |
1037 | |
1038 | ret = atk_add_sensor(data, obj); |
1039 | if (ret > 0) |
1040 | count++; |
1041 | } |
1042 | ACPI_FREE(buf.pointer); |
1043 | |
1044 | return count; |
1045 | cleanup: |
1046 | atk_free_sensors(data); |
1047 | return ret; |
1048 | } |
1049 | |
1050 | static int atk_ec_present(struct atk_data *data) |
1051 | { |
1052 | struct device *dev = &data->acpi_dev->dev; |
1053 | union acpi_object *pack; |
1054 | union acpi_object *ec; |
1055 | int ret; |
1056 | int i; |
1057 | |
1058 | pack = atk_ggrp(data, ATK_MUX_MGMT); |
1059 | if (IS_ERR(pack)) { |
1060 | if (PTR_ERR(pack) == -ENOENT) { |
1061 | /* The MGMT class does not exists - that's ok */ |
1062 | dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT); |
1063 | return 0; |
1064 | } |
1065 | return PTR_ERR(pack); |
1066 | } |
1067 | |
1068 | /* Search the EC */ |
1069 | ec = NULL; |
1070 | for (i = 0; i < pack->package.count; i++) { |
1071 | union acpi_object *obj = &pack->package.elements[i]; |
1072 | union acpi_object *id; |
1073 | |
1074 | if (obj->type != ACPI_TYPE_PACKAGE) |
1075 | continue; |
1076 | |
1077 | id = &obj->package.elements[0]; |
1078 | if (id->type != ACPI_TYPE_INTEGER) |
1079 | continue; |
1080 | |
1081 | if (id->integer.value == ATK_EC_ID) { |
1082 | ec = obj; |
1083 | break; |
1084 | } |
1085 | } |
1086 | |
1087 | ret = (ec != NULL); |
1088 | if (!ret) |
1089 | /* The system has no EC */ |
1090 | dev_dbg(dev, "EC not found\n"); |
1091 | |
1092 | ACPI_FREE(pack); |
1093 | return ret; |
1094 | } |
1095 | |
1096 | static int atk_ec_enabled(struct atk_data *data) |
1097 | { |
1098 | struct device *dev = &data->acpi_dev->dev; |
1099 | union acpi_object *obj; |
1100 | struct atk_acpi_ret_buffer *buf; |
1101 | int err; |
1102 | |
1103 | obj = atk_gitm(data, ATK_EC_ID); |
1104 | if (IS_ERR(obj)) { |
1105 | dev_err(dev, "Unable to query EC status\n"); |
1106 | return PTR_ERR(obj); |
1107 | } |
1108 | buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; |
1109 | |
1110 | if (buf->flags == 0) { |
1111 | dev_err(dev, "Unable to query EC status\n"); |
1112 | err = -EIO; |
1113 | } else { |
1114 | err = (buf->value != 0); |
1115 | dev_dbg(dev, "EC is %sabled\n", |
1116 | err ? "en" : "dis"); |
1117 | } |
1118 | |
1119 | ACPI_FREE(obj); |
1120 | return err; |
1121 | } |
1122 | |
1123 | static int atk_ec_ctl(struct atk_data *data, int enable) |
1124 | { |
1125 | struct device *dev = &data->acpi_dev->dev; |
1126 | union acpi_object *obj; |
1127 | struct atk_acpi_input_buf sitm; |
1128 | struct atk_acpi_ret_buffer *ec_ret; |
1129 | int err = 0; |
1130 | |
1131 | sitm.id = ATK_EC_ID; |
1132 | sitm.param1 = enable; |
1133 | sitm.param2 = 0; |
1134 | |
1135 | obj = atk_sitm(data, &sitm); |
1136 | if (IS_ERR(obj)) { |
1137 | dev_err(dev, "Failed to %sable the EC\n", |
1138 | enable ? "en" : "dis"); |
1139 | return PTR_ERR(obj); |
1140 | } |
1141 | ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; |
1142 | if (ec_ret->flags == 0) { |
1143 | dev_err(dev, "Failed to %sable the EC\n", |
1144 | enable ? "en" : "dis"); |
1145 | err = -EIO; |
1146 | } else { |
1147 | dev_info(dev, "EC %sabled\n", |
1148 | enable ? "en" : "dis"); |
1149 | } |
1150 | |
1151 | ACPI_FREE(obj); |
1152 | return err; |
1153 | } |
1154 | |
1155 | static int atk_enumerate_new_hwmon(struct atk_data *data) |
1156 | { |
1157 | struct device *dev = &data->acpi_dev->dev; |
1158 | union acpi_object *pack; |
1159 | int err; |
1160 | int i; |
1161 | |
1162 | err = atk_ec_present(data); |
1163 | if (err < 0) |
1164 | return err; |
1165 | if (err) { |
1166 | err = atk_ec_enabled(data); |
1167 | if (err < 0) |
1168 | return err; |
1169 | /* If the EC was disabled we will disable it again on unload */ |
1170 | data->disable_ec = err; |
1171 | |
1172 | err = atk_ec_ctl(data, 1); |
1173 | if (err) { |
1174 | data->disable_ec = false; |
1175 | return err; |
1176 | } |
1177 | } |
1178 | |
1179 | dev_dbg(dev, "Enumerating hwmon sensors\n"); |
1180 | |
1181 | pack = atk_ggrp(data, ATK_MUX_HWMON); |
1182 | if (IS_ERR(pack)) |
1183 | return PTR_ERR(pack); |
1184 | |
1185 | for (i = 0; i < pack->package.count; i++) { |
1186 | union acpi_object *obj = &pack->package.elements[i]; |
1187 | |
1188 | atk_add_sensor(data, obj); |
1189 | } |
1190 | |
1191 | err = data->voltage_count + data->temperature_count + data->fan_count; |
1192 | |
1193 | ACPI_FREE(pack); |
1194 | return err; |
1195 | } |
1196 | |
1197 | static int atk_create_files(struct atk_data *data) |
1198 | { |
1199 | struct atk_sensor_data *s; |
1200 | int err; |
1201 | |
1202 | list_for_each_entry(s, &data->sensor_list, list) { |
1203 | err = device_create_file(data->hwmon_dev, &s->input_attr); |
1204 | if (err) |
1205 | return err; |
1206 | err = device_create_file(data->hwmon_dev, &s->label_attr); |
1207 | if (err) |
1208 | return err; |
1209 | err = device_create_file(data->hwmon_dev, &s->limit1_attr); |
1210 | if (err) |
1211 | return err; |
1212 | err = device_create_file(data->hwmon_dev, &s->limit2_attr); |
1213 | if (err) |
1214 | return err; |
1215 | } |
1216 | |
1217 | err = device_create_file(data->hwmon_dev, &atk_name_attr); |
1218 | |
1219 | return err; |
1220 | } |
1221 | |
1222 | static void atk_remove_files(struct atk_data *data) |
1223 | { |
1224 | struct atk_sensor_data *s; |
1225 | |
1226 | list_for_each_entry(s, &data->sensor_list, list) { |
1227 | device_remove_file(data->hwmon_dev, &s->input_attr); |
1228 | device_remove_file(data->hwmon_dev, &s->label_attr); |
1229 | device_remove_file(data->hwmon_dev, &s->limit1_attr); |
1230 | device_remove_file(data->hwmon_dev, &s->limit2_attr); |
1231 | } |
1232 | device_remove_file(data->hwmon_dev, &atk_name_attr); |
1233 | } |
1234 | |
1235 | static void atk_free_sensors(struct atk_data *data) |
1236 | { |
1237 | struct list_head *head = &data->sensor_list; |
1238 | struct atk_sensor_data *s, *tmp; |
1239 | |
1240 | list_for_each_entry_safe(s, tmp, head, list) { |
1241 | kfree(s->acpi_name); |
1242 | kfree(s); |
1243 | } |
1244 | } |
1245 | |
1246 | static int atk_register_hwmon(struct atk_data *data) |
1247 | { |
1248 | struct device *dev = &data->acpi_dev->dev; |
1249 | int err; |
1250 | |
1251 | dev_dbg(dev, "registering hwmon device\n"); |
1252 | data->hwmon_dev = hwmon_device_register(dev); |
1253 | if (IS_ERR(data->hwmon_dev)) |
1254 | return PTR_ERR(data->hwmon_dev); |
1255 | |
1256 | dev_dbg(dev, "populating sysfs directory\n"); |
1257 | err = atk_create_files(data); |
1258 | if (err) |
1259 | goto remove; |
1260 | |
1261 | return 0; |
1262 | remove: |
1263 | /* Cleanup the registered files */ |
1264 | atk_remove_files(data); |
1265 | hwmon_device_unregister(data->hwmon_dev); |
1266 | return err; |
1267 | } |
1268 | |
1269 | static int atk_probe_if(struct atk_data *data) |
1270 | { |
1271 | struct device *dev = &data->acpi_dev->dev; |
1272 | acpi_handle ret; |
1273 | acpi_status status; |
1274 | int err = 0; |
1275 | |
1276 | /* RTMP: read temperature */ |
1277 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret); |
1278 | if (ACPI_SUCCESS(status)) |
1279 | data->rtmp_handle = ret; |
1280 | else |
1281 | dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n", |
1282 | acpi_format_exception(status)); |
1283 | |
1284 | /* RVLT: read voltage */ |
1285 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret); |
1286 | if (ACPI_SUCCESS(status)) |
1287 | data->rvlt_handle = ret; |
1288 | else |
1289 | dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n", |
1290 | acpi_format_exception(status)); |
1291 | |
1292 | /* RFAN: read fan status */ |
1293 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret); |
1294 | if (ACPI_SUCCESS(status)) |
1295 | data->rfan_handle = ret; |
1296 | else |
1297 | dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n", |
1298 | acpi_format_exception(status)); |
1299 | |
1300 | /* Enumeration */ |
1301 | status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret); |
1302 | if (ACPI_SUCCESS(status)) |
1303 | data->enumerate_handle = ret; |
1304 | else |
1305 | dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n", |
1306 | acpi_format_exception(status)); |
1307 | |
1308 | /* De-multiplexer (read) */ |
1309 | status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret); |
1310 | if (ACPI_SUCCESS(status)) |
1311 | data->read_handle = ret; |
1312 | else |
1313 | dev_dbg(dev, "method " METHOD_READ " not found: %s\n", |
1314 | acpi_format_exception(status)); |
1315 | |
1316 | /* De-multiplexer (write) */ |
1317 | status = acpi_get_handle(data->atk_handle, METHOD_WRITE, &ret); |
1318 | if (ACPI_SUCCESS(status)) |
1319 | data->write_handle = ret; |
1320 | else |
1321 | dev_dbg(dev, "method " METHOD_WRITE " not found: %s\n", |
1322 | acpi_format_exception(status)); |
1323 | |
1324 | /* |
1325 | * Check for hwmon methods: first check "old" style methods; note that |
1326 | * both may be present: in this case we stick to the old interface; |
1327 | * analysis of multiple DSDTs indicates that when both interfaces |
1328 | * are present the new one (GGRP/GITM) is not functional. |
1329 | */ |
1330 | if (new_if) |
1331 | dev_info(dev, "Overriding interface detection\n"); |
1332 | if (data->rtmp_handle && |
1333 | data->rvlt_handle && data->rfan_handle && !new_if) |
1334 | data->old_interface = true; |
1335 | else if (data->enumerate_handle && data->read_handle && |
1336 | data->write_handle) |
1337 | data->old_interface = false; |
1338 | else |
1339 | err = -ENODEV; |
1340 | |
1341 | return err; |
1342 | } |
1343 | |
1344 | static int atk_add(struct acpi_device *device) |
1345 | { |
1346 | acpi_status ret; |
1347 | int err; |
1348 | struct acpi_buffer buf; |
1349 | union acpi_object *obj; |
1350 | struct atk_data *data; |
1351 | |
1352 | dev_dbg(&device->dev, "adding...\n"); |
1353 | |
1354 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1355 | if (!data) |
1356 | return -ENOMEM; |
1357 | |
1358 | data->acpi_dev = device; |
1359 | data->atk_handle = device->handle; |
1360 | INIT_LIST_HEAD(&data->sensor_list); |
1361 | data->disable_ec = false; |
1362 | |
1363 | buf.length = ACPI_ALLOCATE_BUFFER; |
1364 | ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL, |
1365 | &buf, ACPI_TYPE_PACKAGE); |
1366 | if (ret != AE_OK) { |
1367 | dev_dbg(&device->dev, "atk: method MBIF not found\n"); |
1368 | } else { |
1369 | obj = buf.pointer; |
1370 | if (obj->package.count >= 2) { |
1371 | union acpi_object *id = &obj->package.elements[1]; |
1372 | if (id->type == ACPI_TYPE_STRING) |
1373 | dev_dbg(&device->dev, "board ID = %s\n", |
1374 | id->string.pointer); |
1375 | } |
1376 | ACPI_FREE(buf.pointer); |
1377 | } |
1378 | |
1379 | err = atk_probe_if(data); |
1380 | if (err) { |
1381 | dev_err(&device->dev, "No usable hwmon interface detected\n"); |
1382 | goto out; |
1383 | } |
1384 | |
1385 | if (data->old_interface) { |
1386 | dev_dbg(&device->dev, "Using old hwmon interface\n"); |
1387 | err = atk_enumerate_old_hwmon(data); |
1388 | } else { |
1389 | dev_dbg(&device->dev, "Using new hwmon interface\n"); |
1390 | err = atk_enumerate_new_hwmon(data); |
1391 | } |
1392 | if (err < 0) |
1393 | goto out; |
1394 | if (err == 0) { |
1395 | dev_info(&device->dev, |
1396 | "No usable sensor detected, bailing out\n"); |
1397 | err = -ENODEV; |
1398 | goto out; |
1399 | } |
1400 | |
1401 | err = atk_register_hwmon(data); |
1402 | if (err) |
1403 | goto cleanup; |
1404 | |
1405 | atk_debugfs_init(data); |
1406 | |
1407 | device->driver_data = data; |
1408 | return 0; |
1409 | cleanup: |
1410 | atk_free_sensors(data); |
1411 | out: |
1412 | if (data->disable_ec) |
1413 | atk_ec_ctl(data, 0); |
1414 | kfree(data); |
1415 | return err; |
1416 | } |
1417 | |
1418 | static int atk_remove(struct acpi_device *device, int type) |
1419 | { |
1420 | struct atk_data *data = device->driver_data; |
1421 | dev_dbg(&device->dev, "removing...\n"); |
1422 | |
1423 | device->driver_data = NULL; |
1424 | |
1425 | atk_debugfs_cleanup(data); |
1426 | |
1427 | atk_remove_files(data); |
1428 | atk_free_sensors(data); |
1429 | hwmon_device_unregister(data->hwmon_dev); |
1430 | |
1431 | if (data->disable_ec) { |
1432 | if (atk_ec_ctl(data, 0)) |
1433 | dev_err(&device->dev, "Failed to disable EC\n"); |
1434 | } |
1435 | |
1436 | kfree(data); |
1437 | |
1438 | return 0; |
1439 | } |
1440 | |
1441 | static int __init atk0110_init(void) |
1442 | { |
1443 | int ret; |
1444 | |
1445 | /* Make sure it's safe to access the device through ACPI */ |
1446 | if (!acpi_resources_are_enforced()) { |
1447 | pr_err("Resources not safely usable due to acpi_enforce_resources kernel parameter\n"); |
1448 | return -EBUSY; |
1449 | } |
1450 | |
1451 | if (dmi_check_system(atk_force_new_if)) |
1452 | new_if = true; |
1453 | |
1454 | ret = acpi_bus_register_driver(&atk_driver); |
1455 | if (ret) |
1456 | pr_info("acpi_bus_register_driver failed: %d\n", ret); |
1457 | |
1458 | return ret; |
1459 | } |
1460 | |
1461 | static void __exit atk0110_exit(void) |
1462 | { |
1463 | acpi_bus_unregister_driver(&atk_driver); |
1464 | } |
1465 | |
1466 | module_init(atk0110_init); |
1467 | module_exit(atk0110_exit); |
1468 | |
1469 | MODULE_LICENSE("GPL"); |
1470 |
Branches:
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javiroman/ks7010
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9