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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 | #include <linux/kernel.h> | |
9 | #include <linux/hwmon.h> | |
10 | #include <linux/list.h> | |
11 | #include <linux/module.h> | |
12 | ||
13 | #include <acpi/acpi.h> | |
14 | #include <acpi/acpixf.h> | |
15 | #include <acpi/acpi_drivers.h> | |
16 | #include <acpi/acpi_bus.h> | |
17 | ||
18 | ||
19 | #define ATK_HID "ATK0110" | |
20 | ||
21 | /* Minimum time between readings, enforced in order to avoid | |
22 | * hogging the CPU. | |
23 | */ | |
24 | #define CACHE_TIME HZ | |
25 | ||
26 | #define BOARD_ID "MBIF" | |
27 | #define METHOD_ENUMERATE "GGRP" | |
28 | #define METHOD_READ "GITM" | |
29 | #define METHOD_WRITE "SITM" | |
30 | #define METHOD_OLD_READ_TMP "RTMP" | |
31 | #define METHOD_OLD_READ_VLT "RVLT" | |
32 | #define METHOD_OLD_READ_FAN "RFAN" | |
33 | #define METHOD_OLD_ENUM_TMP "TSIF" | |
34 | #define METHOD_OLD_ENUM_VLT "VSIF" | |
35 | #define METHOD_OLD_ENUM_FAN "FSIF" | |
36 | ||
37 | #define ATK_MUX_HWMON 0x00000006ULL | |
38 | ||
39 | #define ATK_CLASS_MASK 0xff000000ULL | |
40 | #define ATK_CLASS_FREQ_CTL 0x03000000ULL | |
41 | #define ATK_CLASS_FAN_CTL 0x04000000ULL | |
42 | #define ATK_CLASS_HWMON 0x06000000ULL | |
43 | ||
44 | #define ATK_TYPE_MASK 0x00ff0000ULL | |
45 | #define HWMON_TYPE_VOLT 0x00020000ULL | |
46 | #define HWMON_TYPE_TEMP 0x00030000ULL | |
47 | #define HWMON_TYPE_FAN 0x00040000ULL | |
48 | ||
49 | #define HWMON_SENSOR_ID_MASK 0x0000ffffULL | |
50 | ||
51 | enum atk_pack_member { | |
52 | HWMON_PACK_FLAGS, | |
53 | HWMON_PACK_NAME, | |
54 | HWMON_PACK_LIMIT1, | |
55 | HWMON_PACK_LIMIT2, | |
56 | HWMON_PACK_ENABLE | |
57 | }; | |
58 | ||
59 | /* New package format */ | |
60 | #define _HWMON_NEW_PACK_SIZE 7 | |
61 | #define _HWMON_NEW_PACK_FLAGS 0 | |
62 | #define _HWMON_NEW_PACK_NAME 1 | |
63 | #define _HWMON_NEW_PACK_UNK1 2 | |
64 | #define _HWMON_NEW_PACK_UNK2 3 | |
65 | #define _HWMON_NEW_PACK_LIMIT1 4 | |
66 | #define _HWMON_NEW_PACK_LIMIT2 5 | |
67 | #define _HWMON_NEW_PACK_ENABLE 6 | |
68 | ||
69 | /* Old package format */ | |
70 | #define _HWMON_OLD_PACK_SIZE 5 | |
71 | #define _HWMON_OLD_PACK_FLAGS 0 | |
72 | #define _HWMON_OLD_PACK_NAME 1 | |
73 | #define _HWMON_OLD_PACK_LIMIT1 2 | |
74 | #define _HWMON_OLD_PACK_LIMIT2 3 | |
75 | #define _HWMON_OLD_PACK_ENABLE 4 | |
76 | ||
77 | ||
78 | struct atk_data { | |
79 | struct device *hwmon_dev; | |
80 | acpi_handle atk_handle; | |
81 | struct acpi_device *acpi_dev; | |
82 | ||
83 | bool old_interface; | |
84 | ||
85 | /* old interface */ | |
86 | acpi_handle rtmp_handle; | |
87 | acpi_handle rvlt_handle; | |
88 | acpi_handle rfan_handle; | |
89 | /* new inteface */ | |
90 | acpi_handle enumerate_handle; | |
91 | acpi_handle read_handle; | |
92 | ||
93 | int voltage_count; | |
94 | int temperature_count; | |
95 | int fan_count; | |
96 | struct list_head sensor_list; | |
97 | }; | |
98 | ||
99 | ||
100 | typedef ssize_t (*sysfs_show_func)(struct device *dev, | |
101 | struct device_attribute *attr, char *buf); | |
102 | ||
103 | static const struct acpi_device_id atk_ids[] = { | |
104 | {ATK_HID, 0}, | |
105 | {"", 0}, | |
106 | }; | |
107 | MODULE_DEVICE_TABLE(acpi, atk_ids); | |
108 | ||
109 | #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */ | |
110 | ||
111 | struct atk_sensor_data { | |
112 | struct list_head list; | |
113 | struct atk_data *data; | |
114 | struct device_attribute label_attr; | |
115 | struct device_attribute input_attr; | |
116 | struct device_attribute limit1_attr; | |
117 | struct device_attribute limit2_attr; | |
118 | char label_attr_name[ATTR_NAME_SIZE]; | |
119 | char input_attr_name[ATTR_NAME_SIZE]; | |
120 | char limit1_attr_name[ATTR_NAME_SIZE]; | |
121 | char limit2_attr_name[ATTR_NAME_SIZE]; | |
122 | u64 id; | |
123 | u64 type; | |
124 | u64 limit1; | |
125 | u64 limit2; | |
126 | u64 cached_value; | |
127 | unsigned long last_updated; /* in jiffies */ | |
128 | bool is_valid; | |
129 | char const *acpi_name; | |
130 | }; | |
131 | ||
132 | struct atk_acpi_buffer_u64 { | |
133 | union acpi_object buf; | |
134 | u64 value; | |
135 | }; | |
136 | ||
137 | static int atk_add(struct acpi_device *device); | |
138 | static int atk_remove(struct acpi_device *device, int type); | |
139 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj); | |
140 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value); | |
141 | static void atk_free_sensors(struct atk_data *data); | |
142 | ||
143 | static struct acpi_driver atk_driver = { | |
144 | .name = ATK_HID, | |
145 | .class = "hwmon", | |
146 | .ids = atk_ids, | |
147 | .ops = { | |
148 | .add = atk_add, | |
149 | .remove = atk_remove, | |
150 | }, | |
151 | }; | |
152 | ||
153 | #define input_to_atk_sensor(attr) \ | |
154 | container_of(attr, struct atk_sensor_data, input_attr) | |
155 | ||
156 | #define label_to_atk_sensor(attr) \ | |
157 | container_of(attr, struct atk_sensor_data, label_attr) | |
158 | ||
159 | #define limit1_to_atk_sensor(attr) \ | |
160 | container_of(attr, struct atk_sensor_data, limit1_attr) | |
161 | ||
162 | #define limit2_to_atk_sensor(attr) \ | |
163 | container_of(attr, struct atk_sensor_data, limit2_attr) | |
164 | ||
165 | static ssize_t atk_input_show(struct device *dev, | |
166 | struct device_attribute *attr, char *buf) | |
167 | { | |
168 | struct atk_sensor_data *s = input_to_atk_sensor(attr); | |
169 | u64 value; | |
170 | int err; | |
171 | ||
172 | err = atk_read_value(s, &value); | |
173 | if (err) | |
174 | return err; | |
175 | ||
176 | if (s->type == HWMON_TYPE_TEMP) | |
177 | /* ACPI returns decidegree */ | |
178 | value *= 100; | |
179 | ||
180 | return sprintf(buf, "%llu\n", value); | |
181 | } | |
182 | ||
183 | static ssize_t atk_label_show(struct device *dev, | |
184 | struct device_attribute *attr, char *buf) | |
185 | { | |
186 | struct atk_sensor_data *s = label_to_atk_sensor(attr); | |
187 | ||
188 | return sprintf(buf, "%s\n", s->acpi_name); | |
189 | } | |
190 | ||
191 | static ssize_t atk_limit1_show(struct device *dev, | |
192 | struct device_attribute *attr, char *buf) | |
193 | { | |
194 | struct atk_sensor_data *s = limit1_to_atk_sensor(attr); | |
195 | u64 value = s->limit1; | |
196 | ||
197 | if (s->type == HWMON_TYPE_TEMP) | |
198 | value *= 100; | |
199 | ||
200 | return sprintf(buf, "%lld\n", value); | |
201 | } | |
202 | ||
203 | static ssize_t atk_limit2_show(struct device *dev, | |
204 | struct device_attribute *attr, char *buf) | |
205 | { | |
206 | struct atk_sensor_data *s = limit2_to_atk_sensor(attr); | |
207 | u64 value = s->limit2; | |
208 | ||
209 | if (s->type == HWMON_TYPE_TEMP) | |
210 | value *= 100; | |
211 | ||
212 | return sprintf(buf, "%lld\n", value); | |
213 | } | |
214 | ||
215 | static ssize_t atk_name_show(struct device *dev, | |
216 | struct device_attribute *attr, char *buf) | |
217 | { | |
218 | return sprintf(buf, "atk0110\n"); | |
219 | } | |
220 | static struct device_attribute atk_name_attr = | |
221 | __ATTR(name, 0444, atk_name_show, NULL); | |
222 | ||
223 | static void atk_init_attribute(struct device_attribute *attr, char *name, | |
224 | sysfs_show_func show) | |
225 | { | |
226 | attr->attr.name = name; | |
227 | attr->attr.mode = 0444; | |
228 | attr->show = show; | |
229 | attr->store = NULL; | |
230 | } | |
231 | ||
232 | ||
233 | static union acpi_object *atk_get_pack_member(struct atk_data *data, | |
234 | union acpi_object *pack, | |
235 | enum atk_pack_member m) | |
236 | { | |
237 | bool old_if = data->old_interface; | |
238 | int offset; | |
239 | ||
240 | switch (m) { | |
241 | case HWMON_PACK_FLAGS: | |
242 | offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS; | |
243 | break; | |
244 | case HWMON_PACK_NAME: | |
245 | offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME; | |
246 | break; | |
247 | case HWMON_PACK_LIMIT1: | |
248 | offset = old_if ? _HWMON_OLD_PACK_LIMIT1 : | |
249 | _HWMON_NEW_PACK_LIMIT1; | |
250 | break; | |
251 | case HWMON_PACK_LIMIT2: | |
252 | offset = old_if ? _HWMON_OLD_PACK_LIMIT2 : | |
253 | _HWMON_NEW_PACK_LIMIT2; | |
254 | break; | |
255 | case HWMON_PACK_ENABLE: | |
256 | offset = old_if ? _HWMON_OLD_PACK_ENABLE : | |
257 | _HWMON_NEW_PACK_ENABLE; | |
258 | break; | |
259 | default: | |
260 | return NULL; | |
261 | } | |
262 | ||
263 | return &pack->package.elements[offset]; | |
264 | } | |
265 | ||
266 | ||
267 | /* New package format is: | |
268 | * - flag (int) | |
269 | * class - used for de-muxing the request to the correct GITn | |
270 | * type (volt, temp, fan) | |
271 | * sensor id | | |
272 | * sensor id - used for de-muxing the request _inside_ the GITn | |
273 | * - name (str) | |
274 | * - unknown (int) | |
275 | * - unknown (int) | |
276 | * - limit1 (int) | |
277 | * - limit2 (int) | |
278 | * - enable (int) | |
279 | * | |
280 | * The old package has the same format but it's missing the two unknown fields. | |
281 | */ | |
282 | static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj) | |
283 | { | |
284 | struct device *dev = &data->acpi_dev->dev; | |
285 | union acpi_object *tmp; | |
286 | bool old_if = data->old_interface; | |
287 | int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE : | |
288 | _HWMON_NEW_PACK_SIZE; | |
289 | ||
290 | if (obj->type != ACPI_TYPE_PACKAGE) { | |
291 | dev_warn(dev, "Invalid type: %d\n", obj->type); | |
292 | return -EINVAL; | |
293 | } | |
294 | ||
295 | if (obj->package.count != expected_size) { | |
296 | dev_warn(dev, "Invalid package size: %d, expected: %d\n", | |
297 | obj->package.count, expected_size); | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); | |
302 | if (tmp->type != ACPI_TYPE_INTEGER) { | |
303 | dev_warn(dev, "Invalid type (flag): %d\n", tmp->type); | |
304 | return -EINVAL; | |
305 | } | |
306 | ||
307 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
308 | if (tmp->type != ACPI_TYPE_STRING) { | |
309 | dev_warn(dev, "Invalid type (name): %d\n", tmp->type); | |
310 | return -EINVAL; | |
311 | } | |
312 | ||
313 | /* Don't check... we don't know what they're useful for anyway */ | |
314 | #if 0 | |
315 | tmp = &obj->package.elements[HWMON_PACK_UNK1]; | |
316 | if (tmp->type != ACPI_TYPE_INTEGER) { | |
317 | dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type); | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | tmp = &obj->package.elements[HWMON_PACK_UNK2]; | |
322 | if (tmp->type != ACPI_TYPE_INTEGER) { | |
323 | dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type); | |
324 | return -EINVAL; | |
325 | } | |
326 | #endif | |
327 | ||
328 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
329 | if (tmp->type != ACPI_TYPE_INTEGER) { | |
330 | dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type); | |
331 | return -EINVAL; | |
332 | } | |
333 | ||
334 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
335 | if (tmp->type != ACPI_TYPE_INTEGER) { | |
336 | dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type); | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
340 | tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); | |
341 | if (tmp->type != ACPI_TYPE_INTEGER) { | |
342 | dev_warn(dev, "Invalid type (enable): %d\n", tmp->type); | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
346 | atk_print_sensor(data, obj); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | #ifdef DEBUG | |
352 | static char const *atk_sensor_type(union acpi_object *flags) | |
353 | { | |
354 | u64 type = flags->integer.value & ATK_TYPE_MASK; | |
355 | char const *what; | |
356 | ||
357 | switch (type) { | |
358 | case HWMON_TYPE_VOLT: | |
359 | what = "voltage"; | |
360 | break; | |
361 | case HWMON_TYPE_TEMP: | |
362 | what = "temperature"; | |
363 | break; | |
364 | case HWMON_TYPE_FAN: | |
365 | what = "fan"; | |
366 | break; | |
367 | default: | |
368 | what = "unknown"; | |
369 | break; | |
370 | } | |
371 | ||
372 | return what; | |
373 | } | |
374 | #endif | |
375 | ||
376 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj) | |
377 | { | |
378 | #ifdef DEBUG | |
379 | struct device *dev = &data->acpi_dev->dev; | |
380 | union acpi_object *flags; | |
381 | union acpi_object *name; | |
382 | union acpi_object *limit1; | |
383 | union acpi_object *limit2; | |
384 | union acpi_object *enable; | |
385 | char const *what; | |
386 | ||
387 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); | |
388 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
389 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
390 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
391 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); | |
392 | ||
393 | what = atk_sensor_type(flags); | |
394 | ||
395 | dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what, | |
396 | flags->integer.value, | |
397 | name->string.pointer, | |
398 | limit1->integer.value, limit2->integer.value, | |
399 | enable->integer.value ? "enabled" : "disabled"); | |
400 | #endif | |
401 | } | |
402 | ||
403 | static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value) | |
404 | { | |
405 | struct atk_data *data = sensor->data; | |
406 | struct device *dev = &data->acpi_dev->dev; | |
407 | struct acpi_object_list params; | |
408 | union acpi_object id; | |
409 | acpi_status status; | |
410 | acpi_handle method; | |
411 | ||
412 | switch (sensor->type) { | |
413 | case HWMON_TYPE_VOLT: | |
414 | method = data->rvlt_handle; | |
415 | break; | |
416 | case HWMON_TYPE_TEMP: | |
417 | method = data->rtmp_handle; | |
418 | break; | |
419 | case HWMON_TYPE_FAN: | |
420 | method = data->rfan_handle; | |
421 | break; | |
422 | default: | |
423 | return -EINVAL; | |
424 | } | |
425 | ||
426 | id.type = ACPI_TYPE_INTEGER; | |
427 | id.integer.value = sensor->id; | |
428 | ||
429 | params.count = 1; | |
430 | params.pointer = &id; | |
431 | ||
432 | status = acpi_evaluate_integer(method, NULL, ¶ms, value); | |
433 | if (status != AE_OK) { | |
434 | dev_warn(dev, "%s: ACPI exception: %s\n", __func__, | |
435 | acpi_format_exception(status)); | |
436 | return -EIO; | |
437 | } | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
442 | static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value) | |
443 | { | |
444 | struct atk_data *data = sensor->data; | |
445 | struct device *dev = &data->acpi_dev->dev; | |
446 | struct acpi_object_list params; | |
447 | struct acpi_buffer ret; | |
448 | union acpi_object id; | |
449 | struct atk_acpi_buffer_u64 tmp; | |
450 | acpi_status status; | |
451 | ||
452 | id.type = ACPI_TYPE_INTEGER; | |
453 | id.integer.value = sensor->id; | |
454 | ||
455 | params.count = 1; | |
456 | params.pointer = &id; | |
457 | ||
458 | tmp.buf.type = ACPI_TYPE_BUFFER; | |
459 | tmp.buf.buffer.pointer = (u8 *)&tmp.value; | |
460 | tmp.buf.buffer.length = sizeof(u64); | |
461 | ret.length = sizeof(tmp); | |
462 | ret.pointer = &tmp; | |
463 | ||
464 | status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms, | |
465 | &ret, ACPI_TYPE_BUFFER); | |
466 | if (status != AE_OK) { | |
467 | dev_warn(dev, "%s: ACPI exception: %s\n", __func__, | |
468 | acpi_format_exception(status)); | |
469 | return -EIO; | |
470 | } | |
471 | ||
472 | /* Return buffer format: | |
473 | * [0-3] "value" is valid flag | |
474 | * [4-7] value | |
475 | */ | |
476 | if (!(tmp.value & 0xffffffff)) { | |
477 | /* The reading is not valid, possible causes: | |
478 | * - sensor failure | |
479 | * - enumeration was FUBAR (and we didn't notice) | |
480 | */ | |
481 | dev_info(dev, "Failure: %#llx\n", tmp.value); | |
482 | return -EIO; | |
483 | } | |
484 | ||
485 | *value = (tmp.value & 0xffffffff00000000ULL) >> 32; | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value) | |
491 | { | |
492 | int err; | |
493 | ||
494 | if (!sensor->is_valid || | |
495 | time_after(jiffies, sensor->last_updated + CACHE_TIME)) { | |
496 | if (sensor->data->old_interface) | |
497 | err = atk_read_value_old(sensor, value); | |
498 | else | |
499 | err = atk_read_value_new(sensor, value); | |
500 | ||
501 | sensor->is_valid = true; | |
502 | sensor->last_updated = jiffies; | |
503 | sensor->cached_value = *value; | |
504 | } else { | |
505 | *value = sensor->cached_value; | |
506 | err = 0; | |
507 | } | |
508 | ||
509 | return err; | |
510 | } | |
511 | ||
512 | static int atk_add_sensor(struct atk_data *data, union acpi_object *obj) | |
513 | { | |
514 | struct device *dev = &data->acpi_dev->dev; | |
515 | union acpi_object *flags; | |
516 | union acpi_object *name; | |
517 | union acpi_object *limit1; | |
518 | union acpi_object *limit2; | |
519 | union acpi_object *enable; | |
520 | struct atk_sensor_data *sensor; | |
521 | char const *base_name; | |
522 | char const *limit1_name; | |
523 | char const *limit2_name; | |
524 | u64 type; | |
525 | int err; | |
526 | int *num; | |
527 | int start; | |
528 | ||
529 | if (obj->type != ACPI_TYPE_PACKAGE) { | |
530 | /* wft is this? */ | |
531 | dev_warn(dev, "Unknown type for ACPI object: (%d)\n", | |
532 | obj->type); | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
536 | err = validate_hwmon_pack(data, obj); | |
537 | if (err) | |
538 | return err; | |
539 | ||
540 | /* Ok, we have a valid hwmon package */ | |
541 | type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value | |
542 | & ATK_TYPE_MASK; | |
543 | ||
544 | switch (type) { | |
545 | case HWMON_TYPE_VOLT: | |
546 | base_name = "in"; | |
547 | limit1_name = "min"; | |
548 | limit2_name = "max"; | |
549 | num = &data->voltage_count; | |
550 | start = 0; | |
551 | break; | |
552 | case HWMON_TYPE_TEMP: | |
553 | base_name = "temp"; | |
554 | limit1_name = "max"; | |
555 | limit2_name = "crit"; | |
556 | num = &data->temperature_count; | |
557 | start = 1; | |
558 | break; | |
559 | case HWMON_TYPE_FAN: | |
560 | base_name = "fan"; | |
561 | limit1_name = "min"; | |
562 | limit2_name = "max"; | |
563 | num = &data->fan_count; | |
564 | start = 1; | |
565 | break; | |
566 | default: | |
567 | dev_warn(dev, "Unknown sensor type: %#llx\n", type); | |
568 | return -EINVAL; | |
569 | } | |
570 | ||
571 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); | |
572 | if (!enable->integer.value) | |
573 | /* sensor is disabled */ | |
574 | return 0; | |
575 | ||
576 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); | |
577 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
578 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
579 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
580 | ||
581 | sensor = kzalloc(sizeof(*sensor), GFP_KERNEL); | |
582 | if (!sensor) | |
583 | return -ENOMEM; | |
584 | ||
585 | sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL); | |
586 | if (!sensor->acpi_name) { | |
587 | err = -ENOMEM; | |
588 | goto out; | |
589 | } | |
590 | ||
591 | INIT_LIST_HEAD(&sensor->list); | |
592 | sensor->type = type; | |
593 | sensor->data = data; | |
594 | sensor->id = flags->integer.value; | |
595 | sensor->limit1 = limit1->integer.value; | |
596 | if (data->old_interface) | |
597 | sensor->limit2 = limit2->integer.value; | |
598 | else | |
599 | /* The upper limit is expressed as delta from lower limit */ | |
600 | sensor->limit2 = sensor->limit1 + limit2->integer.value; | |
601 | ||
602 | snprintf(sensor->input_attr_name, ATTR_NAME_SIZE, | |
603 | "%s%d_input", base_name, start + *num); | |
604 | atk_init_attribute(&sensor->input_attr, | |
605 | sensor->input_attr_name, | |
606 | atk_input_show); | |
607 | ||
608 | snprintf(sensor->label_attr_name, ATTR_NAME_SIZE, | |
609 | "%s%d_label", base_name, start + *num); | |
610 | atk_init_attribute(&sensor->label_attr, | |
611 | sensor->label_attr_name, | |
612 | atk_label_show); | |
613 | ||
614 | snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE, | |
615 | "%s%d_%s", base_name, start + *num, limit1_name); | |
616 | atk_init_attribute(&sensor->limit1_attr, | |
617 | sensor->limit1_attr_name, | |
618 | atk_limit1_show); | |
619 | ||
620 | snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE, | |
621 | "%s%d_%s", base_name, start + *num, limit2_name); | |
622 | atk_init_attribute(&sensor->limit2_attr, | |
623 | sensor->limit2_attr_name, | |
624 | atk_limit2_show); | |
625 | ||
626 | list_add(&sensor->list, &data->sensor_list); | |
627 | (*num)++; | |
628 | ||
629 | return 1; | |
630 | out: | |
631 | kfree(sensor->acpi_name); | |
632 | kfree(sensor); | |
633 | return err; | |
634 | } | |
635 | ||
636 | static int atk_enumerate_old_hwmon(struct atk_data *data) | |
637 | { | |
638 | struct device *dev = &data->acpi_dev->dev; | |
639 | struct acpi_buffer buf; | |
640 | union acpi_object *pack; | |
641 | acpi_status status; | |
642 | int i, ret; | |
643 | int count = 0; | |
644 | ||
645 | /* Voltages */ | |
646 | buf.length = ACPI_ALLOCATE_BUFFER; | |
647 | status = acpi_evaluate_object_typed(data->atk_handle, | |
648 | METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE); | |
649 | if (status != AE_OK) { | |
650 | dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n", | |
651 | acpi_format_exception(status)); | |
652 | ||
653 | return -ENODEV; | |
654 | } | |
655 | ||
656 | pack = buf.pointer; | |
657 | for (i = 1; i < pack->package.count; i++) { | |
658 | union acpi_object *obj = &pack->package.elements[i]; | |
659 | ||
660 | ret = atk_add_sensor(data, obj); | |
661 | if (ret > 0) | |
662 | count++; | |
663 | } | |
664 | ACPI_FREE(buf.pointer); | |
665 | ||
666 | /* Temperatures */ | |
667 | buf.length = ACPI_ALLOCATE_BUFFER; | |
668 | status = acpi_evaluate_object_typed(data->atk_handle, | |
669 | METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE); | |
670 | if (status != AE_OK) { | |
671 | dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n", | |
672 | acpi_format_exception(status)); | |
673 | ||
674 | ret = -ENODEV; | |
675 | goto cleanup; | |
676 | } | |
677 | ||
678 | pack = buf.pointer; | |
679 | for (i = 1; i < pack->package.count; i++) { | |
680 | union acpi_object *obj = &pack->package.elements[i]; | |
681 | ||
682 | ret = atk_add_sensor(data, obj); | |
683 | if (ret > 0) | |
684 | count++; | |
685 | } | |
686 | ACPI_FREE(buf.pointer); | |
687 | ||
688 | /* Fans */ | |
689 | buf.length = ACPI_ALLOCATE_BUFFER; | |
690 | status = acpi_evaluate_object_typed(data->atk_handle, | |
691 | METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE); | |
692 | if (status != AE_OK) { | |
693 | dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n", | |
694 | acpi_format_exception(status)); | |
695 | ||
696 | ret = -ENODEV; | |
697 | goto cleanup; | |
698 | } | |
699 | ||
700 | pack = buf.pointer; | |
701 | for (i = 1; i < pack->package.count; i++) { | |
702 | union acpi_object *obj = &pack->package.elements[i]; | |
703 | ||
704 | ret = atk_add_sensor(data, obj); | |
705 | if (ret > 0) | |
706 | count++; | |
707 | } | |
708 | ACPI_FREE(buf.pointer); | |
709 | ||
710 | return count; | |
711 | cleanup: | |
712 | atk_free_sensors(data); | |
713 | return ret; | |
714 | } | |
715 | ||
716 | static int atk_enumerate_new_hwmon(struct atk_data *data) | |
717 | { | |
718 | struct device *dev = &data->acpi_dev->dev; | |
719 | struct acpi_buffer buf; | |
720 | acpi_status ret; | |
721 | struct acpi_object_list params; | |
722 | union acpi_object id; | |
723 | union acpi_object *pack; | |
724 | int err; | |
725 | int i; | |
726 | ||
727 | dev_dbg(dev, "Enumerating hwmon sensors\n"); | |
728 | ||
729 | id.type = ACPI_TYPE_INTEGER; | |
730 | id.integer.value = ATK_MUX_HWMON; | |
731 | params.count = 1; | |
732 | params.pointer = &id; | |
733 | ||
734 | buf.length = ACPI_ALLOCATE_BUFFER; | |
735 | ret = acpi_evaluate_object_typed(data->enumerate_handle, NULL, ¶ms, | |
736 | &buf, ACPI_TYPE_PACKAGE); | |
737 | if (ret != AE_OK) { | |
738 | dev_warn(dev, METHOD_ENUMERATE ": ACPI exception: %s\n", | |
739 | acpi_format_exception(ret)); | |
740 | return -ENODEV; | |
741 | } | |
742 | ||
743 | /* Result must be a package */ | |
744 | pack = buf.pointer; | |
745 | ||
746 | if (pack->package.count < 1) { | |
747 | dev_dbg(dev, "%s: hwmon package is too small: %d\n", __func__, | |
748 | pack->package.count); | |
749 | err = -EINVAL; | |
750 | goto out; | |
751 | } | |
752 | ||
753 | for (i = 0; i < pack->package.count; i++) { | |
754 | union acpi_object *obj = &pack->package.elements[i]; | |
755 | ||
756 | atk_add_sensor(data, obj); | |
757 | } | |
758 | ||
759 | err = data->voltage_count + data->temperature_count + data->fan_count; | |
760 | ||
761 | out: | |
762 | ACPI_FREE(buf.pointer); | |
763 | return err; | |
764 | } | |
765 | ||
766 | static int atk_create_files(struct atk_data *data) | |
767 | { | |
768 | struct atk_sensor_data *s; | |
769 | int err; | |
770 | ||
771 | list_for_each_entry(s, &data->sensor_list, list) { | |
772 | err = device_create_file(data->hwmon_dev, &s->input_attr); | |
773 | if (err) | |
774 | return err; | |
775 | err = device_create_file(data->hwmon_dev, &s->label_attr); | |
776 | if (err) | |
777 | return err; | |
778 | err = device_create_file(data->hwmon_dev, &s->limit1_attr); | |
779 | if (err) | |
780 | return err; | |
781 | err = device_create_file(data->hwmon_dev, &s->limit2_attr); | |
782 | if (err) | |
783 | return err; | |
784 | } | |
785 | ||
786 | err = device_create_file(data->hwmon_dev, &atk_name_attr); | |
787 | ||
788 | return err; | |
789 | } | |
790 | ||
791 | static void atk_remove_files(struct atk_data *data) | |
792 | { | |
793 | struct atk_sensor_data *s; | |
794 | ||
795 | list_for_each_entry(s, &data->sensor_list, list) { | |
796 | device_remove_file(data->hwmon_dev, &s->input_attr); | |
797 | device_remove_file(data->hwmon_dev, &s->label_attr); | |
798 | device_remove_file(data->hwmon_dev, &s->limit1_attr); | |
799 | device_remove_file(data->hwmon_dev, &s->limit2_attr); | |
800 | } | |
801 | device_remove_file(data->hwmon_dev, &atk_name_attr); | |
802 | } | |
803 | ||
804 | static void atk_free_sensors(struct atk_data *data) | |
805 | { | |
806 | struct list_head *head = &data->sensor_list; | |
807 | struct atk_sensor_data *s, *tmp; | |
808 | ||
809 | list_for_each_entry_safe(s, tmp, head, list) { | |
810 | kfree(s->acpi_name); | |
811 | kfree(s); | |
812 | } | |
813 | } | |
814 | ||
815 | static int atk_register_hwmon(struct atk_data *data) | |
816 | { | |
817 | struct device *dev = &data->acpi_dev->dev; | |
818 | int err; | |
819 | ||
820 | dev_dbg(dev, "registering hwmon device\n"); | |
821 | data->hwmon_dev = hwmon_device_register(dev); | |
822 | if (IS_ERR(data->hwmon_dev)) | |
823 | return PTR_ERR(data->hwmon_dev); | |
824 | ||
825 | dev_dbg(dev, "populating sysfs directory\n"); | |
826 | err = atk_create_files(data); | |
827 | if (err) | |
828 | goto remove; | |
829 | ||
830 | return 0; | |
831 | remove: | |
832 | /* Cleanup the registered files */ | |
833 | atk_remove_files(data); | |
834 | hwmon_device_unregister(data->hwmon_dev); | |
835 | return err; | |
836 | } | |
837 | ||
838 | static int atk_check_old_if(struct atk_data *data) | |
839 | { | |
840 | struct device *dev = &data->acpi_dev->dev; | |
841 | acpi_handle ret; | |
842 | acpi_status status; | |
843 | ||
844 | /* RTMP: read temperature */ | |
845 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret); | |
846 | if (status != AE_OK) { | |
847 | dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n", | |
848 | acpi_format_exception(status)); | |
849 | return -ENODEV; | |
850 | } | |
851 | data->rtmp_handle = ret; | |
852 | ||
853 | /* RVLT: read voltage */ | |
854 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret); | |
855 | if (status != AE_OK) { | |
856 | dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n", | |
857 | acpi_format_exception(status)); | |
858 | return -ENODEV; | |
859 | } | |
860 | data->rvlt_handle = ret; | |
861 | ||
862 | /* RFAN: read fan status */ | |
863 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret); | |
864 | if (status != AE_OK) { | |
865 | dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n", | |
866 | acpi_format_exception(status)); | |
867 | return -ENODEV; | |
868 | } | |
869 | data->rfan_handle = ret; | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | static int atk_check_new_if(struct atk_data *data) | |
875 | { | |
876 | struct device *dev = &data->acpi_dev->dev; | |
877 | acpi_handle ret; | |
878 | acpi_status status; | |
879 | ||
880 | /* Enumeration */ | |
881 | status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret); | |
882 | if (status != AE_OK) { | |
883 | dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n", | |
884 | acpi_format_exception(status)); | |
885 | return -ENODEV; | |
886 | } | |
887 | data->enumerate_handle = ret; | |
888 | ||
889 | /* De-multiplexer (read) */ | |
890 | status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret); | |
891 | if (status != AE_OK) { | |
892 | dev_dbg(dev, "method " METHOD_READ " not found: %s\n", | |
893 | acpi_format_exception(status)); | |
894 | return -ENODEV; | |
895 | } | |
896 | data->read_handle = ret; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | static int atk_add(struct acpi_device *device) | |
902 | { | |
903 | acpi_status ret; | |
904 | int err; | |
905 | struct acpi_buffer buf; | |
906 | union acpi_object *obj; | |
907 | struct atk_data *data; | |
908 | ||
909 | dev_dbg(&device->dev, "adding...\n"); | |
910 | ||
911 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
912 | if (!data) | |
913 | return -ENOMEM; | |
914 | ||
915 | data->acpi_dev = device; | |
916 | data->atk_handle = device->handle; | |
917 | INIT_LIST_HEAD(&data->sensor_list); | |
918 | ||
919 | buf.length = ACPI_ALLOCATE_BUFFER; | |
920 | ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL, | |
921 | &buf, ACPI_TYPE_PACKAGE); | |
922 | if (ret != AE_OK) { | |
923 | dev_dbg(&device->dev, "atk: method MBIF not found\n"); | |
924 | err = -ENODEV; | |
925 | goto out; | |
926 | } | |
927 | ||
928 | obj = buf.pointer; | |
929 | if (obj->package.count >= 2 && | |
930 | obj->package.elements[1].type == ACPI_TYPE_STRING) { | |
931 | dev_dbg(&device->dev, "board ID = %s\n", | |
932 | obj->package.elements[1].string.pointer); | |
933 | } | |
934 | ACPI_FREE(buf.pointer); | |
935 | ||
936 | /* Check for hwmon methods: first check "old" style methods; note that | |
937 | * both may be present: in this case we stick to the old interface; | |
938 | * analysis of multiple DSDTs indicates that when both interfaces | |
939 | * are present the new one (GGRP/GITM) is not functional. | |
940 | */ | |
941 | err = atk_check_old_if(data); | |
942 | if (!err) { | |
943 | dev_dbg(&device->dev, "Using old hwmon interface\n"); | |
944 | data->old_interface = true; | |
945 | } else { | |
946 | err = atk_check_new_if(data); | |
947 | if (err) | |
948 | goto out; | |
949 | ||
950 | dev_dbg(&device->dev, "Using new hwmon interface\n"); | |
951 | data->old_interface = false; | |
952 | } | |
953 | ||
954 | if (data->old_interface) | |
955 | err = atk_enumerate_old_hwmon(data); | |
956 | else | |
957 | err = atk_enumerate_new_hwmon(data); | |
958 | if (err < 0) | |
959 | goto out; | |
960 | if (err == 0) { | |
961 | dev_info(&device->dev, | |
962 | "No usable sensor detected, bailing out\n"); | |
963 | err = -ENODEV; | |
964 | goto out; | |
965 | } | |
966 | ||
967 | err = atk_register_hwmon(data); | |
968 | if (err) | |
969 | goto cleanup; | |
970 | ||
971 | device->driver_data = data; | |
972 | return 0; | |
973 | cleanup: | |
974 | atk_free_sensors(data); | |
975 | out: | |
976 | kfree(data); | |
977 | return err; | |
978 | } | |
979 | ||
980 | static int atk_remove(struct acpi_device *device, int type) | |
981 | { | |
982 | struct atk_data *data = device->driver_data; | |
983 | dev_dbg(&device->dev, "removing...\n"); | |
984 | ||
985 | device->driver_data = NULL; | |
986 | ||
987 | atk_remove_files(data); | |
988 | atk_free_sensors(data); | |
989 | hwmon_device_unregister(data->hwmon_dev); | |
990 | ||
991 | kfree(data); | |
992 | ||
993 | return 0; | |
994 | } | |
995 | ||
996 | static int __init atk0110_init(void) | |
997 | { | |
998 | int ret; | |
999 | ||
1000 | ret = acpi_bus_register_driver(&atk_driver); | |
1001 | if (ret) | |
1002 | pr_info("atk: acpi_bus_register_driver failed: %d\n", ret); | |
1003 | ||
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | static void __exit atk0110_exit(void) | |
1008 | { | |
1009 | acpi_bus_unregister_driver(&atk_driver); | |
1010 | } | |
1011 | ||
1012 | module_init(atk0110_init); | |
1013 | module_exit(atk0110_exit); | |
1014 | ||
1015 | MODULE_LICENSE("GPL"); |