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2c03d07a LT |
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 | ||
ac561494 JP |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | ||
7e5eab11 | 10 | #include <linux/debugfs.h> |
2c03d07a LT |
11 | #include <linux/kernel.h> |
12 | #include <linux/hwmon.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/module.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
86ca33e8 | 16 | #include <linux/dmi.h> |
2c03d07a LT |
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 | ||
86ca33e8 LT |
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 | { } | |
39 | }; | |
40 | ||
2c03d07a LT |
41 | /* Minimum time between readings, enforced in order to avoid |
42 | * hogging the CPU. | |
43 | */ | |
44 | #define CACHE_TIME HZ | |
45 | ||
46 | #define BOARD_ID "MBIF" | |
47 | #define METHOD_ENUMERATE "GGRP" | |
48 | #define METHOD_READ "GITM" | |
49 | #define METHOD_WRITE "SITM" | |
50 | #define METHOD_OLD_READ_TMP "RTMP" | |
51 | #define METHOD_OLD_READ_VLT "RVLT" | |
52 | #define METHOD_OLD_READ_FAN "RFAN" | |
53 | #define METHOD_OLD_ENUM_TMP "TSIF" | |
54 | #define METHOD_OLD_ENUM_VLT "VSIF" | |
55 | #define METHOD_OLD_ENUM_FAN "FSIF" | |
56 | ||
57 | #define ATK_MUX_HWMON 0x00000006ULL | |
9e6eba61 | 58 | #define ATK_MUX_MGMT 0x00000011ULL |
2c03d07a LT |
59 | |
60 | #define ATK_CLASS_MASK 0xff000000ULL | |
61 | #define ATK_CLASS_FREQ_CTL 0x03000000ULL | |
62 | #define ATK_CLASS_FAN_CTL 0x04000000ULL | |
63 | #define ATK_CLASS_HWMON 0x06000000ULL | |
9e6eba61 | 64 | #define ATK_CLASS_MGMT 0x11000000ULL |
2c03d07a LT |
65 | |
66 | #define ATK_TYPE_MASK 0x00ff0000ULL | |
67 | #define HWMON_TYPE_VOLT 0x00020000ULL | |
68 | #define HWMON_TYPE_TEMP 0x00030000ULL | |
69 | #define HWMON_TYPE_FAN 0x00040000ULL | |
70 | ||
9e6eba61 LT |
71 | #define ATK_ELEMENT_ID_MASK 0x0000ffffULL |
72 | ||
73 | #define ATK_EC_ID 0x11060004ULL | |
2c03d07a LT |
74 | |
75 | enum atk_pack_member { | |
76 | HWMON_PACK_FLAGS, | |
77 | HWMON_PACK_NAME, | |
78 | HWMON_PACK_LIMIT1, | |
79 | HWMON_PACK_LIMIT2, | |
80 | HWMON_PACK_ENABLE | |
81 | }; | |
82 | ||
83 | /* New package format */ | |
84 | #define _HWMON_NEW_PACK_SIZE 7 | |
85 | #define _HWMON_NEW_PACK_FLAGS 0 | |
86 | #define _HWMON_NEW_PACK_NAME 1 | |
87 | #define _HWMON_NEW_PACK_UNK1 2 | |
88 | #define _HWMON_NEW_PACK_UNK2 3 | |
89 | #define _HWMON_NEW_PACK_LIMIT1 4 | |
90 | #define _HWMON_NEW_PACK_LIMIT2 5 | |
91 | #define _HWMON_NEW_PACK_ENABLE 6 | |
92 | ||
93 | /* Old package format */ | |
94 | #define _HWMON_OLD_PACK_SIZE 5 | |
95 | #define _HWMON_OLD_PACK_FLAGS 0 | |
96 | #define _HWMON_OLD_PACK_NAME 1 | |
97 | #define _HWMON_OLD_PACK_LIMIT1 2 | |
98 | #define _HWMON_OLD_PACK_LIMIT2 3 | |
99 | #define _HWMON_OLD_PACK_ENABLE 4 | |
100 | ||
101 | ||
102 | struct atk_data { | |
103 | struct device *hwmon_dev; | |
104 | acpi_handle atk_handle; | |
105 | struct acpi_device *acpi_dev; | |
106 | ||
107 | bool old_interface; | |
108 | ||
109 | /* old interface */ | |
110 | acpi_handle rtmp_handle; | |
111 | acpi_handle rvlt_handle; | |
112 | acpi_handle rfan_handle; | |
113 | /* new inteface */ | |
114 | acpi_handle enumerate_handle; | |
115 | acpi_handle read_handle; | |
9e6eba61 LT |
116 | acpi_handle write_handle; |
117 | ||
118 | bool disable_ec; | |
2c03d07a LT |
119 | |
120 | int voltage_count; | |
121 | int temperature_count; | |
122 | int fan_count; | |
123 | struct list_head sensor_list; | |
7e5eab11 LT |
124 | |
125 | struct { | |
126 | struct dentry *root; | |
127 | u32 id; | |
128 | } debugfs; | |
2c03d07a LT |
129 | }; |
130 | ||
131 | ||
132 | typedef ssize_t (*sysfs_show_func)(struct device *dev, | |
133 | struct device_attribute *attr, char *buf); | |
134 | ||
135 | static const struct acpi_device_id atk_ids[] = { | |
136 | {ATK_HID, 0}, | |
137 | {"", 0}, | |
138 | }; | |
139 | MODULE_DEVICE_TABLE(acpi, atk_ids); | |
140 | ||
141 | #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */ | |
142 | ||
143 | struct atk_sensor_data { | |
144 | struct list_head list; | |
145 | struct atk_data *data; | |
146 | struct device_attribute label_attr; | |
147 | struct device_attribute input_attr; | |
148 | struct device_attribute limit1_attr; | |
149 | struct device_attribute limit2_attr; | |
150 | char label_attr_name[ATTR_NAME_SIZE]; | |
151 | char input_attr_name[ATTR_NAME_SIZE]; | |
152 | char limit1_attr_name[ATTR_NAME_SIZE]; | |
153 | char limit2_attr_name[ATTR_NAME_SIZE]; | |
154 | u64 id; | |
155 | u64 type; | |
156 | u64 limit1; | |
157 | u64 limit2; | |
158 | u64 cached_value; | |
159 | unsigned long last_updated; /* in jiffies */ | |
160 | bool is_valid; | |
161 | char const *acpi_name; | |
162 | }; | |
163 | ||
18e25555 LT |
164 | /* Return buffer format: |
165 | * [0-3] "value" is valid flag | |
166 | * [4-7] value | |
167 | * [8- ] unknown stuff on newer mobos | |
168 | */ | |
169 | struct atk_acpi_ret_buffer { | |
170 | u32 flags; | |
171 | u32 value; | |
172 | u8 data[]; | |
173 | }; | |
174 | ||
175 | /* Input buffer used for GITM and SITM methods */ | |
176 | struct atk_acpi_input_buf { | |
177 | u32 id; | |
178 | u32 param1; | |
179 | u32 param2; | |
2c03d07a LT |
180 | }; |
181 | ||
182 | static int atk_add(struct acpi_device *device); | |
183 | static int atk_remove(struct acpi_device *device, int type); | |
184 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj); | |
185 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value); | |
186 | static void atk_free_sensors(struct atk_data *data); | |
187 | ||
188 | static struct acpi_driver atk_driver = { | |
189 | .name = ATK_HID, | |
190 | .class = "hwmon", | |
191 | .ids = atk_ids, | |
192 | .ops = { | |
193 | .add = atk_add, | |
194 | .remove = atk_remove, | |
195 | }, | |
196 | }; | |
197 | ||
198 | #define input_to_atk_sensor(attr) \ | |
199 | container_of(attr, struct atk_sensor_data, input_attr) | |
200 | ||
201 | #define label_to_atk_sensor(attr) \ | |
202 | container_of(attr, struct atk_sensor_data, label_attr) | |
203 | ||
204 | #define limit1_to_atk_sensor(attr) \ | |
205 | container_of(attr, struct atk_sensor_data, limit1_attr) | |
206 | ||
207 | #define limit2_to_atk_sensor(attr) \ | |
208 | container_of(attr, struct atk_sensor_data, limit2_attr) | |
209 | ||
210 | static ssize_t atk_input_show(struct device *dev, | |
211 | struct device_attribute *attr, char *buf) | |
212 | { | |
213 | struct atk_sensor_data *s = input_to_atk_sensor(attr); | |
214 | u64 value; | |
215 | int err; | |
216 | ||
217 | err = atk_read_value(s, &value); | |
218 | if (err) | |
219 | return err; | |
220 | ||
221 | if (s->type == HWMON_TYPE_TEMP) | |
222 | /* ACPI returns decidegree */ | |
223 | value *= 100; | |
224 | ||
225 | return sprintf(buf, "%llu\n", value); | |
226 | } | |
227 | ||
228 | static ssize_t atk_label_show(struct device *dev, | |
229 | struct device_attribute *attr, char *buf) | |
230 | { | |
231 | struct atk_sensor_data *s = label_to_atk_sensor(attr); | |
232 | ||
233 | return sprintf(buf, "%s\n", s->acpi_name); | |
234 | } | |
235 | ||
236 | static ssize_t atk_limit1_show(struct device *dev, | |
237 | struct device_attribute *attr, char *buf) | |
238 | { | |
239 | struct atk_sensor_data *s = limit1_to_atk_sensor(attr); | |
240 | u64 value = s->limit1; | |
241 | ||
242 | if (s->type == HWMON_TYPE_TEMP) | |
243 | value *= 100; | |
244 | ||
245 | return sprintf(buf, "%lld\n", value); | |
246 | } | |
247 | ||
248 | static ssize_t atk_limit2_show(struct device *dev, | |
249 | struct device_attribute *attr, char *buf) | |
250 | { | |
251 | struct atk_sensor_data *s = limit2_to_atk_sensor(attr); | |
252 | u64 value = s->limit2; | |
253 | ||
254 | if (s->type == HWMON_TYPE_TEMP) | |
255 | value *= 100; | |
256 | ||
257 | return sprintf(buf, "%lld\n", value); | |
258 | } | |
259 | ||
260 | static ssize_t atk_name_show(struct device *dev, | |
261 | struct device_attribute *attr, char *buf) | |
262 | { | |
263 | return sprintf(buf, "atk0110\n"); | |
264 | } | |
265 | static struct device_attribute atk_name_attr = | |
266 | __ATTR(name, 0444, atk_name_show, NULL); | |
267 | ||
268 | static void atk_init_attribute(struct device_attribute *attr, char *name, | |
269 | sysfs_show_func show) | |
270 | { | |
271 | attr->attr.name = name; | |
272 | attr->attr.mode = 0444; | |
273 | attr->show = show; | |
274 | attr->store = NULL; | |
275 | } | |
276 | ||
277 | ||
278 | static union acpi_object *atk_get_pack_member(struct atk_data *data, | |
279 | union acpi_object *pack, | |
280 | enum atk_pack_member m) | |
281 | { | |
282 | bool old_if = data->old_interface; | |
283 | int offset; | |
284 | ||
285 | switch (m) { | |
286 | case HWMON_PACK_FLAGS: | |
287 | offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS; | |
288 | break; | |
289 | case HWMON_PACK_NAME: | |
290 | offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME; | |
291 | break; | |
292 | case HWMON_PACK_LIMIT1: | |
293 | offset = old_if ? _HWMON_OLD_PACK_LIMIT1 : | |
294 | _HWMON_NEW_PACK_LIMIT1; | |
295 | break; | |
296 | case HWMON_PACK_LIMIT2: | |
297 | offset = old_if ? _HWMON_OLD_PACK_LIMIT2 : | |
298 | _HWMON_NEW_PACK_LIMIT2; | |
299 | break; | |
300 | case HWMON_PACK_ENABLE: | |
301 | offset = old_if ? _HWMON_OLD_PACK_ENABLE : | |
302 | _HWMON_NEW_PACK_ENABLE; | |
303 | break; | |
304 | default: | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | return &pack->package.elements[offset]; | |
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, obj, 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, obj, 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, obj, 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, obj, 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, obj, 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 | ||
b9008708 | 396 | #ifdef DEBUG |
2c03d07a LT |
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 | } | |
b9008708 | 419 | #endif |
2c03d07a LT |
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, obj, HWMON_PACK_FLAGS); | |
433 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
434 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
435 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
436 | enable = atk_get_pack_member(data, obj, 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(method, NULL, ¶ms, 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 | ||
18e25555 | 487 | static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux) |
2c03d07a | 488 | { |
2c03d07a | 489 | struct device *dev = &data->acpi_dev->dev; |
18e25555 LT |
490 | struct acpi_buffer buf; |
491 | acpi_status ret; | |
2c03d07a | 492 | struct acpi_object_list params; |
2c03d07a | 493 | union acpi_object id; |
18e25555 | 494 | union acpi_object *pack; |
2c03d07a LT |
495 | |
496 | id.type = ACPI_TYPE_INTEGER; | |
18e25555 | 497 | id.integer.value = mux; |
2c03d07a LT |
498 | params.count = 1; |
499 | params.pointer = &id; | |
500 | ||
18e25555 LT |
501 | buf.length = ACPI_ALLOCATE_BUFFER; |
502 | ret = acpi_evaluate_object(data->enumerate_handle, NULL, ¶ms, &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(-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(-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(-EIO); | |
519 | } | |
520 | return pack; | |
521 | } | |
2c03d07a | 522 | |
18e25555 LT |
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; | |
2c03d07a LT |
545 | status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms, |
546 | &ret, ACPI_TYPE_BUFFER); | |
547 | if (status != AE_OK) { | |
18e25555 | 548 | dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id, |
2c03d07a | 549 | acpi_format_exception(status)); |
18e25555 | 550 | return ERR_PTR(-EIO); |
2c03d07a | 551 | } |
18e25555 LT |
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(-EIO); | |
560 | } | |
561 | return obj; | |
562 | } | |
2c03d07a | 563 | |
9e6eba61 LT |
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(data->write_handle, NULL, ¶ms, | |
583 | &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(-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(-EIO); | |
597 | } | |
598 | return obj; | |
599 | } | |
600 | ||
18e25555 LT |
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, sensor->id); | |
610 | if (IS_ERR(obj)) | |
611 | return PTR_ERR(obj); | |
612 | ||
613 | buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; | |
614 | if (buf->flags == 0) { | |
2c03d07a LT |
615 | /* The reading is not valid, possible causes: |
616 | * - sensor failure | |
617 | * - enumeration was FUBAR (and we didn't notice) | |
618 | */ | |
18e25555 LT |
619 | dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id); |
620 | err = -EIO; | |
621 | goto out; | |
2c03d07a LT |
622 | } |
623 | ||
18e25555 LT |
624 | *value = buf->value; |
625 | out: | |
626 | ACPI_FREE(obj); | |
627 | return err; | |
2c03d07a LT |
628 | } |
629 | ||
630 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value) | |
631 | { | |
632 | int err; | |
633 | ||
634 | if (!sensor->is_valid || | |
635 | time_after(jiffies, sensor->last_updated + CACHE_TIME)) { | |
636 | if (sensor->data->old_interface) | |
637 | err = atk_read_value_old(sensor, value); | |
638 | else | |
639 | err = atk_read_value_new(sensor, value); | |
640 | ||
641 | sensor->is_valid = true; | |
642 | sensor->last_updated = jiffies; | |
643 | sensor->cached_value = *value; | |
644 | } else { | |
645 | *value = sensor->cached_value; | |
646 | err = 0; | |
647 | } | |
648 | ||
649 | return err; | |
650 | } | |
651 | ||
7e5eab11 LT |
652 | #ifdef CONFIG_DEBUG_FS |
653 | static int atk_debugfs_gitm_get(void *p, u64 *val) | |
654 | { | |
655 | struct atk_data *data = p; | |
656 | union acpi_object *ret; | |
657 | struct atk_acpi_ret_buffer *buf; | |
658 | int err = 0; | |
659 | ||
660 | if (!data->read_handle) | |
661 | return -ENODEV; | |
662 | ||
663 | if (!data->debugfs.id) | |
664 | return -EINVAL; | |
665 | ||
666 | ret = atk_gitm(data, data->debugfs.id); | |
667 | if (IS_ERR(ret)) | |
668 | return PTR_ERR(ret); | |
669 | ||
670 | buf = (struct atk_acpi_ret_buffer *)ret->buffer.pointer; | |
671 | if (buf->flags) | |
672 | *val = buf->value; | |
673 | else | |
674 | err = -EIO; | |
675 | ||
676 | return err; | |
677 | } | |
678 | ||
679 | DEFINE_SIMPLE_ATTRIBUTE(atk_debugfs_gitm, | |
680 | atk_debugfs_gitm_get, | |
681 | NULL, | |
682 | "0x%08llx\n") | |
683 | ||
684 | static int atk_acpi_print(char *buf, size_t sz, union acpi_object *obj) | |
685 | { | |
686 | int ret = 0; | |
687 | ||
688 | switch (obj->type) { | |
689 | case ACPI_TYPE_INTEGER: | |
690 | ret = snprintf(buf, sz, "0x%08llx\n", obj->integer.value); | |
691 | break; | |
692 | case ACPI_TYPE_STRING: | |
693 | ret = snprintf(buf, sz, "%s\n", obj->string.pointer); | |
694 | break; | |
695 | } | |
696 | ||
697 | return ret; | |
698 | } | |
699 | ||
700 | static void atk_pack_print(char *buf, size_t sz, union acpi_object *pack) | |
701 | { | |
702 | int ret; | |
703 | int i; | |
704 | ||
705 | for (i = 0; i < pack->package.count; i++) { | |
706 | union acpi_object *obj = &pack->package.elements[i]; | |
707 | ||
708 | ret = atk_acpi_print(buf, sz, obj); | |
709 | if (ret >= sz) | |
710 | break; | |
711 | buf += ret; | |
712 | sz -= ret; | |
713 | } | |
714 | } | |
715 | ||
716 | static int atk_debugfs_ggrp_open(struct inode *inode, struct file *file) | |
717 | { | |
718 | struct atk_data *data = inode->i_private; | |
719 | char *buf = NULL; | |
720 | union acpi_object *ret; | |
721 | u8 cls; | |
722 | int i; | |
723 | ||
724 | if (!data->enumerate_handle) | |
725 | return -ENODEV; | |
726 | if (!data->debugfs.id) | |
727 | return -EINVAL; | |
728 | ||
729 | cls = (data->debugfs.id & 0xff000000) >> 24; | |
730 | ret = atk_ggrp(data, cls); | |
731 | if (IS_ERR(ret)) | |
732 | return PTR_ERR(ret); | |
733 | ||
734 | for (i = 0; i < ret->package.count; i++) { | |
735 | union acpi_object *pack = &ret->package.elements[i]; | |
736 | union acpi_object *id; | |
737 | ||
738 | if (pack->type != ACPI_TYPE_PACKAGE) | |
739 | continue; | |
740 | if (!pack->package.count) | |
741 | continue; | |
742 | id = &pack->package.elements[0]; | |
743 | if (id->integer.value == data->debugfs.id) { | |
744 | /* Print the package */ | |
745 | buf = kzalloc(512, GFP_KERNEL); | |
746 | if (!buf) { | |
747 | ACPI_FREE(ret); | |
748 | return -ENOMEM; | |
749 | } | |
750 | atk_pack_print(buf, 512, pack); | |
751 | break; | |
752 | } | |
753 | } | |
754 | ACPI_FREE(ret); | |
755 | ||
756 | if (!buf) | |
757 | return -EINVAL; | |
758 | ||
759 | file->private_data = buf; | |
760 | ||
761 | return nonseekable_open(inode, file); | |
762 | } | |
763 | ||
764 | static ssize_t atk_debugfs_ggrp_read(struct file *file, char __user *buf, | |
765 | size_t count, loff_t *pos) | |
766 | { | |
767 | char *str = file->private_data; | |
768 | size_t len = strlen(str); | |
769 | ||
770 | return simple_read_from_buffer(buf, count, pos, str, len); | |
771 | } | |
772 | ||
773 | static int atk_debugfs_ggrp_release(struct inode *inode, struct file *file) | |
774 | { | |
775 | kfree(file->private_data); | |
776 | return 0; | |
777 | } | |
778 | ||
779 | static const struct file_operations atk_debugfs_ggrp_fops = { | |
780 | .read = atk_debugfs_ggrp_read, | |
781 | .open = atk_debugfs_ggrp_open, | |
782 | .release = atk_debugfs_ggrp_release, | |
6038f373 | 783 | .llseek = no_llseek, |
7e5eab11 LT |
784 | }; |
785 | ||
786 | static void atk_debugfs_init(struct atk_data *data) | |
787 | { | |
788 | struct dentry *d; | |
789 | struct dentry *f; | |
790 | ||
791 | data->debugfs.id = 0; | |
792 | ||
793 | d = debugfs_create_dir("asus_atk0110", NULL); | |
794 | if (!d || IS_ERR(d)) | |
795 | return; | |
796 | ||
797 | f = debugfs_create_x32("id", S_IRUSR | S_IWUSR, d, &data->debugfs.id); | |
798 | if (!f || IS_ERR(f)) | |
799 | goto cleanup; | |
800 | ||
801 | f = debugfs_create_file("gitm", S_IRUSR, d, data, | |
802 | &atk_debugfs_gitm); | |
803 | if (!f || IS_ERR(f)) | |
804 | goto cleanup; | |
805 | ||
806 | f = debugfs_create_file("ggrp", S_IRUSR, d, data, | |
807 | &atk_debugfs_ggrp_fops); | |
808 | if (!f || IS_ERR(f)) | |
809 | goto cleanup; | |
810 | ||
811 | data->debugfs.root = d; | |
812 | ||
813 | return; | |
814 | cleanup: | |
815 | debugfs_remove_recursive(d); | |
816 | } | |
817 | ||
818 | static void atk_debugfs_cleanup(struct atk_data *data) | |
819 | { | |
820 | debugfs_remove_recursive(data->debugfs.root); | |
821 | } | |
822 | ||
823 | #else /* CONFIG_DEBUG_FS */ | |
824 | ||
825 | static void atk_debugfs_init(struct atk_data *data) | |
826 | { | |
827 | } | |
828 | ||
829 | static void atk_debugfs_cleanup(struct atk_data *data) | |
830 | { | |
831 | } | |
832 | #endif | |
833 | ||
2c03d07a LT |
834 | static int atk_add_sensor(struct atk_data *data, union acpi_object *obj) |
835 | { | |
836 | struct device *dev = &data->acpi_dev->dev; | |
837 | union acpi_object *flags; | |
838 | union acpi_object *name; | |
839 | union acpi_object *limit1; | |
840 | union acpi_object *limit2; | |
841 | union acpi_object *enable; | |
842 | struct atk_sensor_data *sensor; | |
843 | char const *base_name; | |
844 | char const *limit1_name; | |
845 | char const *limit2_name; | |
846 | u64 type; | |
847 | int err; | |
848 | int *num; | |
849 | int start; | |
850 | ||
851 | if (obj->type != ACPI_TYPE_PACKAGE) { | |
852 | /* wft is this? */ | |
853 | dev_warn(dev, "Unknown type for ACPI object: (%d)\n", | |
854 | obj->type); | |
855 | return -EINVAL; | |
856 | } | |
857 | ||
858 | err = validate_hwmon_pack(data, obj); | |
859 | if (err) | |
860 | return err; | |
861 | ||
862 | /* Ok, we have a valid hwmon package */ | |
863 | type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value | |
864 | & ATK_TYPE_MASK; | |
865 | ||
866 | switch (type) { | |
867 | case HWMON_TYPE_VOLT: | |
868 | base_name = "in"; | |
869 | limit1_name = "min"; | |
870 | limit2_name = "max"; | |
871 | num = &data->voltage_count; | |
872 | start = 0; | |
873 | break; | |
874 | case HWMON_TYPE_TEMP: | |
875 | base_name = "temp"; | |
876 | limit1_name = "max"; | |
877 | limit2_name = "crit"; | |
878 | num = &data->temperature_count; | |
879 | start = 1; | |
880 | break; | |
881 | case HWMON_TYPE_FAN: | |
882 | base_name = "fan"; | |
883 | limit1_name = "min"; | |
884 | limit2_name = "max"; | |
885 | num = &data->fan_count; | |
886 | start = 1; | |
887 | break; | |
888 | default: | |
889 | dev_warn(dev, "Unknown sensor type: %#llx\n", type); | |
890 | return -EINVAL; | |
891 | } | |
892 | ||
893 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); | |
894 | if (!enable->integer.value) | |
895 | /* sensor is disabled */ | |
896 | return 0; | |
897 | ||
898 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); | |
899 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
900 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
901 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
902 | ||
903 | sensor = kzalloc(sizeof(*sensor), GFP_KERNEL); | |
904 | if (!sensor) | |
905 | return -ENOMEM; | |
906 | ||
907 | sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL); | |
908 | if (!sensor->acpi_name) { | |
909 | err = -ENOMEM; | |
910 | goto out; | |
911 | } | |
912 | ||
913 | INIT_LIST_HEAD(&sensor->list); | |
914 | sensor->type = type; | |
915 | sensor->data = data; | |
916 | sensor->id = flags->integer.value; | |
917 | sensor->limit1 = limit1->integer.value; | |
8d282497 LT |
918 | if (data->old_interface) |
919 | sensor->limit2 = limit2->integer.value; | |
920 | else | |
921 | /* The upper limit is expressed as delta from lower limit */ | |
922 | sensor->limit2 = sensor->limit1 + limit2->integer.value; | |
2c03d07a LT |
923 | |
924 | snprintf(sensor->input_attr_name, ATTR_NAME_SIZE, | |
925 | "%s%d_input", base_name, start + *num); | |
926 | atk_init_attribute(&sensor->input_attr, | |
927 | sensor->input_attr_name, | |
928 | atk_input_show); | |
929 | ||
930 | snprintf(sensor->label_attr_name, ATTR_NAME_SIZE, | |
931 | "%s%d_label", base_name, start + *num); | |
932 | atk_init_attribute(&sensor->label_attr, | |
933 | sensor->label_attr_name, | |
934 | atk_label_show); | |
935 | ||
936 | snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE, | |
937 | "%s%d_%s", base_name, start + *num, limit1_name); | |
938 | atk_init_attribute(&sensor->limit1_attr, | |
939 | sensor->limit1_attr_name, | |
940 | atk_limit1_show); | |
941 | ||
942 | snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE, | |
943 | "%s%d_%s", base_name, start + *num, limit2_name); | |
944 | atk_init_attribute(&sensor->limit2_attr, | |
945 | sensor->limit2_attr_name, | |
946 | atk_limit2_show); | |
947 | ||
948 | list_add(&sensor->list, &data->sensor_list); | |
949 | (*num)++; | |
950 | ||
951 | return 1; | |
952 | out: | |
953 | kfree(sensor->acpi_name); | |
954 | kfree(sensor); | |
955 | return err; | |
956 | } | |
957 | ||
958 | static int atk_enumerate_old_hwmon(struct atk_data *data) | |
959 | { | |
960 | struct device *dev = &data->acpi_dev->dev; | |
961 | struct acpi_buffer buf; | |
962 | union acpi_object *pack; | |
963 | acpi_status status; | |
964 | int i, ret; | |
965 | int count = 0; | |
966 | ||
967 | /* Voltages */ | |
968 | buf.length = ACPI_ALLOCATE_BUFFER; | |
969 | status = acpi_evaluate_object_typed(data->atk_handle, | |
970 | METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE); | |
971 | if (status != AE_OK) { | |
972 | dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n", | |
973 | acpi_format_exception(status)); | |
974 | ||
975 | return -ENODEV; | |
976 | } | |
977 | ||
978 | pack = buf.pointer; | |
979 | for (i = 1; i < pack->package.count; i++) { | |
980 | union acpi_object *obj = &pack->package.elements[i]; | |
981 | ||
982 | ret = atk_add_sensor(data, obj); | |
983 | if (ret > 0) | |
984 | count++; | |
985 | } | |
986 | ACPI_FREE(buf.pointer); | |
987 | ||
988 | /* Temperatures */ | |
989 | buf.length = ACPI_ALLOCATE_BUFFER; | |
990 | status = acpi_evaluate_object_typed(data->atk_handle, | |
991 | METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE); | |
992 | if (status != AE_OK) { | |
993 | dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n", | |
994 | acpi_format_exception(status)); | |
995 | ||
996 | ret = -ENODEV; | |
997 | goto cleanup; | |
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 | /* Fans */ | |
1011 | buf.length = ACPI_ALLOCATE_BUFFER; | |
1012 | status = acpi_evaluate_object_typed(data->atk_handle, | |
1013 | METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE); | |
1014 | if (status != AE_OK) { | |
1015 | dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n", | |
1016 | acpi_format_exception(status)); | |
1017 | ||
1018 | ret = -ENODEV; | |
1019 | goto cleanup; | |
1020 | } | |
1021 | ||
1022 | pack = buf.pointer; | |
1023 | for (i = 1; i < pack->package.count; i++) { | |
1024 | union acpi_object *obj = &pack->package.elements[i]; | |
1025 | ||
1026 | ret = atk_add_sensor(data, obj); | |
1027 | if (ret > 0) | |
1028 | count++; | |
1029 | } | |
1030 | ACPI_FREE(buf.pointer); | |
1031 | ||
1032 | return count; | |
1033 | cleanup: | |
1034 | atk_free_sensors(data); | |
1035 | return ret; | |
1036 | } | |
1037 | ||
9e6eba61 LT |
1038 | static int atk_ec_present(struct atk_data *data) |
1039 | { | |
1040 | struct device *dev = &data->acpi_dev->dev; | |
1041 | union acpi_object *pack; | |
1042 | union acpi_object *ec; | |
1043 | int ret; | |
1044 | int i; | |
1045 | ||
1046 | pack = atk_ggrp(data, ATK_MUX_MGMT); | |
1047 | if (IS_ERR(pack)) { | |
1048 | if (PTR_ERR(pack) == -ENOENT) { | |
1049 | /* The MGMT class does not exists - that's ok */ | |
1050 | dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT); | |
1051 | return 0; | |
1052 | } | |
1053 | return PTR_ERR(pack); | |
1054 | } | |
1055 | ||
1056 | /* Search the EC */ | |
1057 | ec = NULL; | |
1058 | for (i = 0; i < pack->package.count; i++) { | |
1059 | union acpi_object *obj = &pack->package.elements[i]; | |
1060 | union acpi_object *id; | |
1061 | ||
1062 | if (obj->type != ACPI_TYPE_PACKAGE) | |
1063 | continue; | |
1064 | ||
1065 | id = &obj->package.elements[0]; | |
1066 | if (id->type != ACPI_TYPE_INTEGER) | |
1067 | continue; | |
1068 | ||
1069 | if (id->integer.value == ATK_EC_ID) { | |
1070 | ec = obj; | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | ret = (ec != NULL); | |
1076 | if (!ret) | |
1077 | /* The system has no EC */ | |
1078 | dev_dbg(dev, "EC not found\n"); | |
1079 | ||
1080 | ACPI_FREE(pack); | |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | static int atk_ec_enabled(struct atk_data *data) | |
1085 | { | |
1086 | struct device *dev = &data->acpi_dev->dev; | |
1087 | union acpi_object *obj; | |
1088 | struct atk_acpi_ret_buffer *buf; | |
1089 | int err; | |
1090 | ||
1091 | obj = atk_gitm(data, ATK_EC_ID); | |
1092 | if (IS_ERR(obj)) { | |
1093 | dev_err(dev, "Unable to query EC status\n"); | |
1094 | return PTR_ERR(obj); | |
1095 | } | |
1096 | buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; | |
1097 | ||
1098 | if (buf->flags == 0) { | |
1099 | dev_err(dev, "Unable to query EC status\n"); | |
1100 | err = -EIO; | |
1101 | } else { | |
1102 | err = (buf->value != 0); | |
1103 | dev_dbg(dev, "EC is %sabled\n", | |
1104 | err ? "en" : "dis"); | |
1105 | } | |
1106 | ||
1107 | ACPI_FREE(obj); | |
1108 | return err; | |
1109 | } | |
1110 | ||
1111 | static int atk_ec_ctl(struct atk_data *data, int enable) | |
1112 | { | |
1113 | struct device *dev = &data->acpi_dev->dev; | |
1114 | union acpi_object *obj; | |
1115 | struct atk_acpi_input_buf sitm; | |
1116 | struct atk_acpi_ret_buffer *ec_ret; | |
1117 | int err = 0; | |
1118 | ||
1119 | sitm.id = ATK_EC_ID; | |
1120 | sitm.param1 = enable; | |
1121 | sitm.param2 = 0; | |
1122 | ||
1123 | obj = atk_sitm(data, &sitm); | |
1124 | if (IS_ERR(obj)) { | |
1125 | dev_err(dev, "Failed to %sable the EC\n", | |
1126 | enable ? "en" : "dis"); | |
1127 | return PTR_ERR(obj); | |
1128 | } | |
1129 | ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer; | |
1130 | if (ec_ret->flags == 0) { | |
1131 | dev_err(dev, "Failed to %sable the EC\n", | |
1132 | enable ? "en" : "dis"); | |
1133 | err = -EIO; | |
1134 | } else { | |
1135 | dev_info(dev, "EC %sabled\n", | |
1136 | enable ? "en" : "dis"); | |
1137 | } | |
1138 | ||
1139 | ACPI_FREE(obj); | |
1140 | return err; | |
1141 | } | |
1142 | ||
2c03d07a LT |
1143 | static int atk_enumerate_new_hwmon(struct atk_data *data) |
1144 | { | |
1145 | struct device *dev = &data->acpi_dev->dev; | |
2c03d07a LT |
1146 | union acpi_object *pack; |
1147 | int err; | |
1148 | int i; | |
1149 | ||
9e6eba61 LT |
1150 | err = atk_ec_present(data); |
1151 | if (err < 0) | |
1152 | return err; | |
1153 | if (err) { | |
1154 | err = atk_ec_enabled(data); | |
1155 | if (err < 0) | |
1156 | return err; | |
1157 | /* If the EC was disabled we will disable it again on unload */ | |
1158 | data->disable_ec = err; | |
1159 | ||
1160 | err = atk_ec_ctl(data, 1); | |
1161 | if (err) { | |
1162 | data->disable_ec = false; | |
1163 | return err; | |
1164 | } | |
1165 | } | |
1166 | ||
2c03d07a LT |
1167 | dev_dbg(dev, "Enumerating hwmon sensors\n"); |
1168 | ||
18e25555 LT |
1169 | pack = atk_ggrp(data, ATK_MUX_HWMON); |
1170 | if (IS_ERR(pack)) | |
1171 | return PTR_ERR(pack); | |
2c03d07a LT |
1172 | |
1173 | for (i = 0; i < pack->package.count; i++) { | |
1174 | union acpi_object *obj = &pack->package.elements[i]; | |
1175 | ||
1176 | atk_add_sensor(data, obj); | |
1177 | } | |
1178 | ||
1179 | err = data->voltage_count + data->temperature_count + data->fan_count; | |
1180 | ||
18e25555 | 1181 | ACPI_FREE(pack); |
2c03d07a LT |
1182 | return err; |
1183 | } | |
1184 | ||
1185 | static int atk_create_files(struct atk_data *data) | |
1186 | { | |
1187 | struct atk_sensor_data *s; | |
1188 | int err; | |
1189 | ||
1190 | list_for_each_entry(s, &data->sensor_list, list) { | |
a30dcb4f | 1191 | sysfs_attr_init(&s->input_attr.attr); |
2c03d07a LT |
1192 | err = device_create_file(data->hwmon_dev, &s->input_attr); |
1193 | if (err) | |
1194 | return err; | |
a30dcb4f | 1195 | sysfs_attr_init(&s->label_attr.attr); |
2c03d07a LT |
1196 | err = device_create_file(data->hwmon_dev, &s->label_attr); |
1197 | if (err) | |
1198 | return err; | |
a30dcb4f | 1199 | sysfs_attr_init(&s->limit1_attr.attr); |
2c03d07a LT |
1200 | err = device_create_file(data->hwmon_dev, &s->limit1_attr); |
1201 | if (err) | |
1202 | return err; | |
a30dcb4f | 1203 | sysfs_attr_init(&s->limit2_attr.attr); |
2c03d07a LT |
1204 | err = device_create_file(data->hwmon_dev, &s->limit2_attr); |
1205 | if (err) | |
1206 | return err; | |
1207 | } | |
1208 | ||
1209 | err = device_create_file(data->hwmon_dev, &atk_name_attr); | |
1210 | ||
1211 | return err; | |
1212 | } | |
1213 | ||
1214 | static void atk_remove_files(struct atk_data *data) | |
1215 | { | |
1216 | struct atk_sensor_data *s; | |
1217 | ||
1218 | list_for_each_entry(s, &data->sensor_list, list) { | |
1219 | device_remove_file(data->hwmon_dev, &s->input_attr); | |
1220 | device_remove_file(data->hwmon_dev, &s->label_attr); | |
1221 | device_remove_file(data->hwmon_dev, &s->limit1_attr); | |
1222 | device_remove_file(data->hwmon_dev, &s->limit2_attr); | |
1223 | } | |
1224 | device_remove_file(data->hwmon_dev, &atk_name_attr); | |
1225 | } | |
1226 | ||
1227 | static void atk_free_sensors(struct atk_data *data) | |
1228 | { | |
1229 | struct list_head *head = &data->sensor_list; | |
1230 | struct atk_sensor_data *s, *tmp; | |
1231 | ||
1232 | list_for_each_entry_safe(s, tmp, head, list) { | |
1233 | kfree(s->acpi_name); | |
1234 | kfree(s); | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | static int atk_register_hwmon(struct atk_data *data) | |
1239 | { | |
1240 | struct device *dev = &data->acpi_dev->dev; | |
1241 | int err; | |
1242 | ||
1243 | dev_dbg(dev, "registering hwmon device\n"); | |
1244 | data->hwmon_dev = hwmon_device_register(dev); | |
1245 | if (IS_ERR(data->hwmon_dev)) | |
1246 | return PTR_ERR(data->hwmon_dev); | |
1247 | ||
1248 | dev_dbg(dev, "populating sysfs directory\n"); | |
1249 | err = atk_create_files(data); | |
1250 | if (err) | |
1251 | goto remove; | |
1252 | ||
1253 | return 0; | |
1254 | remove: | |
1255 | /* Cleanup the registered files */ | |
1256 | atk_remove_files(data); | |
1257 | hwmon_device_unregister(data->hwmon_dev); | |
1258 | return err; | |
1259 | } | |
1260 | ||
8ba406be | 1261 | static int atk_probe_if(struct atk_data *data) |
2c03d07a LT |
1262 | { |
1263 | struct device *dev = &data->acpi_dev->dev; | |
1264 | acpi_handle ret; | |
1265 | acpi_status status; | |
8ba406be | 1266 | int err = 0; |
2c03d07a LT |
1267 | |
1268 | /* RTMP: read temperature */ | |
1269 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret); | |
8ba406be LT |
1270 | if (ACPI_SUCCESS(status)) |
1271 | data->rtmp_handle = ret; | |
1272 | else | |
2c03d07a LT |
1273 | dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n", |
1274 | acpi_format_exception(status)); | |
2c03d07a LT |
1275 | |
1276 | /* RVLT: read voltage */ | |
1277 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret); | |
8ba406be LT |
1278 | if (ACPI_SUCCESS(status)) |
1279 | data->rvlt_handle = ret; | |
1280 | else | |
2c03d07a LT |
1281 | dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n", |
1282 | acpi_format_exception(status)); | |
2c03d07a LT |
1283 | |
1284 | /* RFAN: read fan status */ | |
1285 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret); | |
8ba406be LT |
1286 | if (ACPI_SUCCESS(status)) |
1287 | data->rfan_handle = ret; | |
1288 | else | |
2c03d07a LT |
1289 | dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n", |
1290 | acpi_format_exception(status)); | |
2c03d07a LT |
1291 | |
1292 | /* Enumeration */ | |
1293 | status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret); | |
8ba406be LT |
1294 | if (ACPI_SUCCESS(status)) |
1295 | data->enumerate_handle = ret; | |
1296 | else | |
2c03d07a LT |
1297 | dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n", |
1298 | acpi_format_exception(status)); | |
2c03d07a LT |
1299 | |
1300 | /* De-multiplexer (read) */ | |
1301 | status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret); | |
8ba406be LT |
1302 | if (ACPI_SUCCESS(status)) |
1303 | data->read_handle = ret; | |
1304 | else | |
2c03d07a LT |
1305 | dev_dbg(dev, "method " METHOD_READ " not found: %s\n", |
1306 | acpi_format_exception(status)); | |
2c03d07a | 1307 | |
9e6eba61 LT |
1308 | /* De-multiplexer (write) */ |
1309 | status = acpi_get_handle(data->atk_handle, METHOD_WRITE, &ret); | |
8ba406be LT |
1310 | if (ACPI_SUCCESS(status)) |
1311 | data->write_handle = ret; | |
1312 | else | |
1313 | dev_dbg(dev, "method " METHOD_WRITE " not found: %s\n", | |
9e6eba61 | 1314 | acpi_format_exception(status)); |
9e6eba61 | 1315 | |
8ba406be LT |
1316 | /* Check for hwmon methods: first check "old" style methods; note that |
1317 | * both may be present: in this case we stick to the old interface; | |
1318 | * analysis of multiple DSDTs indicates that when both interfaces | |
1319 | * are present the new one (GGRP/GITM) is not functional. | |
1320 | */ | |
86ca33e8 LT |
1321 | if (new_if) |
1322 | dev_info(dev, "Overriding interface detection\n"); | |
1323 | if (data->rtmp_handle && data->rvlt_handle && data->rfan_handle && !new_if) | |
8ba406be LT |
1324 | data->old_interface = true; |
1325 | else if (data->enumerate_handle && data->read_handle && | |
1326 | data->write_handle) | |
1327 | data->old_interface = false; | |
1328 | else | |
1329 | err = -ENODEV; | |
1330 | ||
1331 | return err; | |
2c03d07a LT |
1332 | } |
1333 | ||
1334 | static int atk_add(struct acpi_device *device) | |
1335 | { | |
1336 | acpi_status ret; | |
1337 | int err; | |
1338 | struct acpi_buffer buf; | |
1339 | union acpi_object *obj; | |
1340 | struct atk_data *data; | |
1341 | ||
1342 | dev_dbg(&device->dev, "adding...\n"); | |
1343 | ||
1344 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
1345 | if (!data) | |
1346 | return -ENOMEM; | |
1347 | ||
1348 | data->acpi_dev = device; | |
1349 | data->atk_handle = device->handle; | |
1350 | INIT_LIST_HEAD(&data->sensor_list); | |
9e6eba61 | 1351 | data->disable_ec = false; |
2c03d07a LT |
1352 | |
1353 | buf.length = ACPI_ALLOCATE_BUFFER; | |
1354 | ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL, | |
1355 | &buf, ACPI_TYPE_PACKAGE); | |
1356 | if (ret != AE_OK) { | |
1357 | dev_dbg(&device->dev, "atk: method MBIF not found\n"); | |
5542482b LT |
1358 | } else { |
1359 | obj = buf.pointer; | |
1360 | if (obj->package.count >= 2) { | |
1361 | union acpi_object *id = &obj->package.elements[1]; | |
1362 | if (id->type == ACPI_TYPE_STRING) | |
1363 | dev_dbg(&device->dev, "board ID = %s\n", | |
1364 | id->string.pointer); | |
1365 | } | |
1366 | ACPI_FREE(buf.pointer); | |
2c03d07a | 1367 | } |
2c03d07a | 1368 | |
8ba406be LT |
1369 | err = atk_probe_if(data); |
1370 | if (err) { | |
1371 | dev_err(&device->dev, "No usable hwmon interface detected\n"); | |
1372 | goto out; | |
2c03d07a LT |
1373 | } |
1374 | ||
8ba406be LT |
1375 | if (data->old_interface) { |
1376 | dev_dbg(&device->dev, "Using old hwmon interface\n"); | |
2c03d07a | 1377 | err = atk_enumerate_old_hwmon(data); |
8ba406be LT |
1378 | } else { |
1379 | dev_dbg(&device->dev, "Using new hwmon interface\n"); | |
2c03d07a | 1380 | err = atk_enumerate_new_hwmon(data); |
8ba406be | 1381 | } |
2c03d07a LT |
1382 | if (err < 0) |
1383 | goto out; | |
1384 | if (err == 0) { | |
1385 | dev_info(&device->dev, | |
1386 | "No usable sensor detected, bailing out\n"); | |
1387 | err = -ENODEV; | |
1388 | goto out; | |
1389 | } | |
1390 | ||
1391 | err = atk_register_hwmon(data); | |
1392 | if (err) | |
1393 | goto cleanup; | |
1394 | ||
7e5eab11 LT |
1395 | atk_debugfs_init(data); |
1396 | ||
2c03d07a LT |
1397 | device->driver_data = data; |
1398 | return 0; | |
1399 | cleanup: | |
1400 | atk_free_sensors(data); | |
1401 | out: | |
9e6eba61 LT |
1402 | if (data->disable_ec) |
1403 | atk_ec_ctl(data, 0); | |
2c03d07a LT |
1404 | kfree(data); |
1405 | return err; | |
1406 | } | |
1407 | ||
1408 | static int atk_remove(struct acpi_device *device, int type) | |
1409 | { | |
1410 | struct atk_data *data = device->driver_data; | |
1411 | dev_dbg(&device->dev, "removing...\n"); | |
1412 | ||
1413 | device->driver_data = NULL; | |
1414 | ||
7e5eab11 LT |
1415 | atk_debugfs_cleanup(data); |
1416 | ||
2c03d07a LT |
1417 | atk_remove_files(data); |
1418 | atk_free_sensors(data); | |
1419 | hwmon_device_unregister(data->hwmon_dev); | |
1420 | ||
9e6eba61 LT |
1421 | if (data->disable_ec) { |
1422 | if (atk_ec_ctl(data, 0)) | |
1423 | dev_err(&device->dev, "Failed to disable EC\n"); | |
1424 | } | |
1425 | ||
2c03d07a LT |
1426 | kfree(data); |
1427 | ||
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | static int __init atk0110_init(void) | |
1432 | { | |
1433 | int ret; | |
1434 | ||
70dd6bea JD |
1435 | /* Make sure it's safe to access the device through ACPI */ |
1436 | if (!acpi_resources_are_enforced()) { | |
ac561494 | 1437 | pr_err("Resources not safely usable due to acpi_enforce_resources kernel parameter\n"); |
70dd6bea JD |
1438 | return -EBUSY; |
1439 | } | |
1440 | ||
86ca33e8 LT |
1441 | if (dmi_check_system(atk_force_new_if)) |
1442 | new_if = true; | |
1443 | ||
2c03d07a LT |
1444 | ret = acpi_bus_register_driver(&atk_driver); |
1445 | if (ret) | |
ac561494 | 1446 | pr_info("acpi_bus_register_driver failed: %d\n", ret); |
2c03d07a LT |
1447 | |
1448 | return ret; | |
1449 | } | |
1450 | ||
1451 | static void __exit atk0110_exit(void) | |
1452 | { | |
1453 | acpi_bus_unregister_driver(&atk_driver); | |
1454 | } | |
1455 | ||
1456 | module_init(atk0110_init); | |
1457 | module_exit(atk0110_exit); | |
1458 | ||
1459 | MODULE_LICENSE("GPL"); |