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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 | ||
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 | static char const *atk_sensor_type(union acpi_object *flags) | |
352 | { | |
353 | u64 type = flags->integer.value & ATK_TYPE_MASK; | |
354 | char const *what; | |
355 | ||
356 | switch (type) { | |
357 | case HWMON_TYPE_VOLT: | |
358 | what = "voltage"; | |
359 | break; | |
360 | case HWMON_TYPE_TEMP: | |
361 | what = "temperature"; | |
362 | break; | |
363 | case HWMON_TYPE_FAN: | |
364 | what = "fan"; | |
365 | break; | |
366 | default: | |
367 | what = "unknown"; | |
368 | break; | |
369 | } | |
370 | ||
371 | return what; | |
372 | } | |
373 | ||
374 | static void atk_print_sensor(struct atk_data *data, union acpi_object *obj) | |
375 | { | |
376 | #ifdef DEBUG | |
377 | struct device *dev = &data->acpi_dev->dev; | |
378 | union acpi_object *flags; | |
379 | union acpi_object *name; | |
380 | union acpi_object *limit1; | |
381 | union acpi_object *limit2; | |
382 | union acpi_object *enable; | |
383 | char const *what; | |
384 | ||
385 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); | |
386 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
387 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
388 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
389 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); | |
390 | ||
391 | what = atk_sensor_type(flags); | |
392 | ||
393 | dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what, | |
394 | flags->integer.value, | |
395 | name->string.pointer, | |
396 | limit1->integer.value, limit2->integer.value, | |
397 | enable->integer.value ? "enabled" : "disabled"); | |
398 | #endif | |
399 | } | |
400 | ||
401 | static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value) | |
402 | { | |
403 | struct atk_data *data = sensor->data; | |
404 | struct device *dev = &data->acpi_dev->dev; | |
405 | struct acpi_object_list params; | |
406 | union acpi_object id; | |
407 | acpi_status status; | |
408 | acpi_handle method; | |
409 | ||
410 | switch (sensor->type) { | |
411 | case HWMON_TYPE_VOLT: | |
412 | method = data->rvlt_handle; | |
413 | break; | |
414 | case HWMON_TYPE_TEMP: | |
415 | method = data->rtmp_handle; | |
416 | break; | |
417 | case HWMON_TYPE_FAN: | |
418 | method = data->rfan_handle; | |
419 | break; | |
420 | default: | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | id.type = ACPI_TYPE_INTEGER; | |
425 | id.integer.value = sensor->id; | |
426 | ||
427 | params.count = 1; | |
428 | params.pointer = &id; | |
429 | ||
430 | status = acpi_evaluate_integer(method, NULL, ¶ms, value); | |
431 | if (status != AE_OK) { | |
432 | dev_warn(dev, "%s: ACPI exception: %s\n", __func__, | |
433 | acpi_format_exception(status)); | |
434 | return -EIO; | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value) | |
441 | { | |
442 | struct atk_data *data = sensor->data; | |
443 | struct device *dev = &data->acpi_dev->dev; | |
444 | struct acpi_object_list params; | |
445 | struct acpi_buffer ret; | |
446 | union acpi_object id; | |
447 | struct atk_acpi_buffer_u64 tmp; | |
448 | acpi_status status; | |
449 | ||
450 | id.type = ACPI_TYPE_INTEGER; | |
451 | id.integer.value = sensor->id; | |
452 | ||
453 | params.count = 1; | |
454 | params.pointer = &id; | |
455 | ||
456 | tmp.buf.type = ACPI_TYPE_BUFFER; | |
457 | tmp.buf.buffer.pointer = (u8 *)&tmp.value; | |
458 | tmp.buf.buffer.length = sizeof(u64); | |
459 | ret.length = sizeof(tmp); | |
460 | ret.pointer = &tmp; | |
461 | ||
462 | status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms, | |
463 | &ret, ACPI_TYPE_BUFFER); | |
464 | if (status != AE_OK) { | |
465 | dev_warn(dev, "%s: ACPI exception: %s\n", __func__, | |
466 | acpi_format_exception(status)); | |
467 | return -EIO; | |
468 | } | |
469 | ||
470 | /* Return buffer format: | |
471 | * [0-3] "value" is valid flag | |
472 | * [4-7] value | |
473 | */ | |
474 | if (!(tmp.value & 0xffffffff)) { | |
475 | /* The reading is not valid, possible causes: | |
476 | * - sensor failure | |
477 | * - enumeration was FUBAR (and we didn't notice) | |
478 | */ | |
479 | dev_info(dev, "Failure: %#llx\n", tmp.value); | |
480 | return -EIO; | |
481 | } | |
482 | ||
483 | *value = (tmp.value & 0xffffffff00000000ULL) >> 32; | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | static int atk_read_value(struct atk_sensor_data *sensor, u64 *value) | |
489 | { | |
490 | int err; | |
491 | ||
492 | if (!sensor->is_valid || | |
493 | time_after(jiffies, sensor->last_updated + CACHE_TIME)) { | |
494 | if (sensor->data->old_interface) | |
495 | err = atk_read_value_old(sensor, value); | |
496 | else | |
497 | err = atk_read_value_new(sensor, value); | |
498 | ||
499 | sensor->is_valid = true; | |
500 | sensor->last_updated = jiffies; | |
501 | sensor->cached_value = *value; | |
502 | } else { | |
503 | *value = sensor->cached_value; | |
504 | err = 0; | |
505 | } | |
506 | ||
507 | return err; | |
508 | } | |
509 | ||
510 | static int atk_add_sensor(struct atk_data *data, union acpi_object *obj) | |
511 | { | |
512 | struct device *dev = &data->acpi_dev->dev; | |
513 | union acpi_object *flags; | |
514 | union acpi_object *name; | |
515 | union acpi_object *limit1; | |
516 | union acpi_object *limit2; | |
517 | union acpi_object *enable; | |
518 | struct atk_sensor_data *sensor; | |
519 | char const *base_name; | |
520 | char const *limit1_name; | |
521 | char const *limit2_name; | |
522 | u64 type; | |
523 | int err; | |
524 | int *num; | |
525 | int start; | |
526 | ||
527 | if (obj->type != ACPI_TYPE_PACKAGE) { | |
528 | /* wft is this? */ | |
529 | dev_warn(dev, "Unknown type for ACPI object: (%d)\n", | |
530 | obj->type); | |
531 | return -EINVAL; | |
532 | } | |
533 | ||
534 | err = validate_hwmon_pack(data, obj); | |
535 | if (err) | |
536 | return err; | |
537 | ||
538 | /* Ok, we have a valid hwmon package */ | |
539 | type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value | |
540 | & ATK_TYPE_MASK; | |
541 | ||
542 | switch (type) { | |
543 | case HWMON_TYPE_VOLT: | |
544 | base_name = "in"; | |
545 | limit1_name = "min"; | |
546 | limit2_name = "max"; | |
547 | num = &data->voltage_count; | |
548 | start = 0; | |
549 | break; | |
550 | case HWMON_TYPE_TEMP: | |
551 | base_name = "temp"; | |
552 | limit1_name = "max"; | |
553 | limit2_name = "crit"; | |
554 | num = &data->temperature_count; | |
555 | start = 1; | |
556 | break; | |
557 | case HWMON_TYPE_FAN: | |
558 | base_name = "fan"; | |
559 | limit1_name = "min"; | |
560 | limit2_name = "max"; | |
561 | num = &data->fan_count; | |
562 | start = 1; | |
563 | break; | |
564 | default: | |
565 | dev_warn(dev, "Unknown sensor type: %#llx\n", type); | |
566 | return -EINVAL; | |
567 | } | |
568 | ||
569 | enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE); | |
570 | if (!enable->integer.value) | |
571 | /* sensor is disabled */ | |
572 | return 0; | |
573 | ||
574 | flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS); | |
575 | name = atk_get_pack_member(data, obj, HWMON_PACK_NAME); | |
576 | limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1); | |
577 | limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2); | |
578 | ||
579 | sensor = kzalloc(sizeof(*sensor), GFP_KERNEL); | |
580 | if (!sensor) | |
581 | return -ENOMEM; | |
582 | ||
583 | sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL); | |
584 | if (!sensor->acpi_name) { | |
585 | err = -ENOMEM; | |
586 | goto out; | |
587 | } | |
588 | ||
589 | INIT_LIST_HEAD(&sensor->list); | |
590 | sensor->type = type; | |
591 | sensor->data = data; | |
592 | sensor->id = flags->integer.value; | |
593 | sensor->limit1 = limit1->integer.value; | |
594 | sensor->limit2 = limit2->integer.value; | |
595 | ||
596 | snprintf(sensor->input_attr_name, ATTR_NAME_SIZE, | |
597 | "%s%d_input", base_name, start + *num); | |
598 | atk_init_attribute(&sensor->input_attr, | |
599 | sensor->input_attr_name, | |
600 | atk_input_show); | |
601 | ||
602 | snprintf(sensor->label_attr_name, ATTR_NAME_SIZE, | |
603 | "%s%d_label", base_name, start + *num); | |
604 | atk_init_attribute(&sensor->label_attr, | |
605 | sensor->label_attr_name, | |
606 | atk_label_show); | |
607 | ||
608 | snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE, | |
609 | "%s%d_%s", base_name, start + *num, limit1_name); | |
610 | atk_init_attribute(&sensor->limit1_attr, | |
611 | sensor->limit1_attr_name, | |
612 | atk_limit1_show); | |
613 | ||
614 | snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE, | |
615 | "%s%d_%s", base_name, start + *num, limit2_name); | |
616 | atk_init_attribute(&sensor->limit2_attr, | |
617 | sensor->limit2_attr_name, | |
618 | atk_limit2_show); | |
619 | ||
620 | list_add(&sensor->list, &data->sensor_list); | |
621 | (*num)++; | |
622 | ||
623 | return 1; | |
624 | out: | |
625 | kfree(sensor->acpi_name); | |
626 | kfree(sensor); | |
627 | return err; | |
628 | } | |
629 | ||
630 | static int atk_enumerate_old_hwmon(struct atk_data *data) | |
631 | { | |
632 | struct device *dev = &data->acpi_dev->dev; | |
633 | struct acpi_buffer buf; | |
634 | union acpi_object *pack; | |
635 | acpi_status status; | |
636 | int i, ret; | |
637 | int count = 0; | |
638 | ||
639 | /* Voltages */ | |
640 | buf.length = ACPI_ALLOCATE_BUFFER; | |
641 | status = acpi_evaluate_object_typed(data->atk_handle, | |
642 | METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE); | |
643 | if (status != AE_OK) { | |
644 | dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n", | |
645 | acpi_format_exception(status)); | |
646 | ||
647 | return -ENODEV; | |
648 | } | |
649 | ||
650 | pack = buf.pointer; | |
651 | for (i = 1; i < pack->package.count; i++) { | |
652 | union acpi_object *obj = &pack->package.elements[i]; | |
653 | ||
654 | ret = atk_add_sensor(data, obj); | |
655 | if (ret > 0) | |
656 | count++; | |
657 | } | |
658 | ACPI_FREE(buf.pointer); | |
659 | ||
660 | /* Temperatures */ | |
661 | buf.length = ACPI_ALLOCATE_BUFFER; | |
662 | status = acpi_evaluate_object_typed(data->atk_handle, | |
663 | METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE); | |
664 | if (status != AE_OK) { | |
665 | dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n", | |
666 | acpi_format_exception(status)); | |
667 | ||
668 | ret = -ENODEV; | |
669 | goto cleanup; | |
670 | } | |
671 | ||
672 | pack = buf.pointer; | |
673 | for (i = 1; i < pack->package.count; i++) { | |
674 | union acpi_object *obj = &pack->package.elements[i]; | |
675 | ||
676 | ret = atk_add_sensor(data, obj); | |
677 | if (ret > 0) | |
678 | count++; | |
679 | } | |
680 | ACPI_FREE(buf.pointer); | |
681 | ||
682 | /* Fans */ | |
683 | buf.length = ACPI_ALLOCATE_BUFFER; | |
684 | status = acpi_evaluate_object_typed(data->atk_handle, | |
685 | METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE); | |
686 | if (status != AE_OK) { | |
687 | dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n", | |
688 | acpi_format_exception(status)); | |
689 | ||
690 | ret = -ENODEV; | |
691 | goto cleanup; | |
692 | } | |
693 | ||
694 | pack = buf.pointer; | |
695 | for (i = 1; i < pack->package.count; i++) { | |
696 | union acpi_object *obj = &pack->package.elements[i]; | |
697 | ||
698 | ret = atk_add_sensor(data, obj); | |
699 | if (ret > 0) | |
700 | count++; | |
701 | } | |
702 | ACPI_FREE(buf.pointer); | |
703 | ||
704 | return count; | |
705 | cleanup: | |
706 | atk_free_sensors(data); | |
707 | return ret; | |
708 | } | |
709 | ||
710 | static int atk_enumerate_new_hwmon(struct atk_data *data) | |
711 | { | |
712 | struct device *dev = &data->acpi_dev->dev; | |
713 | struct acpi_buffer buf; | |
714 | acpi_status ret; | |
715 | struct acpi_object_list params; | |
716 | union acpi_object id; | |
717 | union acpi_object *pack; | |
718 | int err; | |
719 | int i; | |
720 | ||
721 | dev_dbg(dev, "Enumerating hwmon sensors\n"); | |
722 | ||
723 | id.type = ACPI_TYPE_INTEGER; | |
724 | id.integer.value = ATK_MUX_HWMON; | |
725 | params.count = 1; | |
726 | params.pointer = &id; | |
727 | ||
728 | buf.length = ACPI_ALLOCATE_BUFFER; | |
729 | ret = acpi_evaluate_object_typed(data->enumerate_handle, NULL, ¶ms, | |
730 | &buf, ACPI_TYPE_PACKAGE); | |
731 | if (ret != AE_OK) { | |
732 | dev_warn(dev, METHOD_ENUMERATE ": ACPI exception: %s\n", | |
733 | acpi_format_exception(ret)); | |
734 | return -ENODEV; | |
735 | } | |
736 | ||
737 | /* Result must be a package */ | |
738 | pack = buf.pointer; | |
739 | ||
740 | if (pack->package.count < 1) { | |
741 | dev_dbg(dev, "%s: hwmon package is too small: %d\n", __func__, | |
742 | pack->package.count); | |
743 | err = -EINVAL; | |
744 | goto out; | |
745 | } | |
746 | ||
747 | for (i = 0; i < pack->package.count; i++) { | |
748 | union acpi_object *obj = &pack->package.elements[i]; | |
749 | ||
750 | atk_add_sensor(data, obj); | |
751 | } | |
752 | ||
753 | err = data->voltage_count + data->temperature_count + data->fan_count; | |
754 | ||
755 | out: | |
756 | ACPI_FREE(buf.pointer); | |
757 | return err; | |
758 | } | |
759 | ||
760 | static int atk_create_files(struct atk_data *data) | |
761 | { | |
762 | struct atk_sensor_data *s; | |
763 | int err; | |
764 | ||
765 | list_for_each_entry(s, &data->sensor_list, list) { | |
766 | err = device_create_file(data->hwmon_dev, &s->input_attr); | |
767 | if (err) | |
768 | return err; | |
769 | err = device_create_file(data->hwmon_dev, &s->label_attr); | |
770 | if (err) | |
771 | return err; | |
772 | err = device_create_file(data->hwmon_dev, &s->limit1_attr); | |
773 | if (err) | |
774 | return err; | |
775 | err = device_create_file(data->hwmon_dev, &s->limit2_attr); | |
776 | if (err) | |
777 | return err; | |
778 | } | |
779 | ||
780 | err = device_create_file(data->hwmon_dev, &atk_name_attr); | |
781 | ||
782 | return err; | |
783 | } | |
784 | ||
785 | static void atk_remove_files(struct atk_data *data) | |
786 | { | |
787 | struct atk_sensor_data *s; | |
788 | ||
789 | list_for_each_entry(s, &data->sensor_list, list) { | |
790 | device_remove_file(data->hwmon_dev, &s->input_attr); | |
791 | device_remove_file(data->hwmon_dev, &s->label_attr); | |
792 | device_remove_file(data->hwmon_dev, &s->limit1_attr); | |
793 | device_remove_file(data->hwmon_dev, &s->limit2_attr); | |
794 | } | |
795 | device_remove_file(data->hwmon_dev, &atk_name_attr); | |
796 | } | |
797 | ||
798 | static void atk_free_sensors(struct atk_data *data) | |
799 | { | |
800 | struct list_head *head = &data->sensor_list; | |
801 | struct atk_sensor_data *s, *tmp; | |
802 | ||
803 | list_for_each_entry_safe(s, tmp, head, list) { | |
804 | kfree(s->acpi_name); | |
805 | kfree(s); | |
806 | } | |
807 | } | |
808 | ||
809 | static int atk_register_hwmon(struct atk_data *data) | |
810 | { | |
811 | struct device *dev = &data->acpi_dev->dev; | |
812 | int err; | |
813 | ||
814 | dev_dbg(dev, "registering hwmon device\n"); | |
815 | data->hwmon_dev = hwmon_device_register(dev); | |
816 | if (IS_ERR(data->hwmon_dev)) | |
817 | return PTR_ERR(data->hwmon_dev); | |
818 | ||
819 | dev_dbg(dev, "populating sysfs directory\n"); | |
820 | err = atk_create_files(data); | |
821 | if (err) | |
822 | goto remove; | |
823 | ||
824 | return 0; | |
825 | remove: | |
826 | /* Cleanup the registered files */ | |
827 | atk_remove_files(data); | |
828 | hwmon_device_unregister(data->hwmon_dev); | |
829 | return err; | |
830 | } | |
831 | ||
832 | static int atk_check_old_if(struct atk_data *data) | |
833 | { | |
834 | struct device *dev = &data->acpi_dev->dev; | |
835 | acpi_handle ret; | |
836 | acpi_status status; | |
837 | ||
838 | /* RTMP: read temperature */ | |
839 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret); | |
840 | if (status != AE_OK) { | |
841 | dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n", | |
842 | acpi_format_exception(status)); | |
843 | return -ENODEV; | |
844 | } | |
845 | data->rtmp_handle = ret; | |
846 | ||
847 | /* RVLT: read voltage */ | |
848 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret); | |
849 | if (status != AE_OK) { | |
850 | dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n", | |
851 | acpi_format_exception(status)); | |
852 | return -ENODEV; | |
853 | } | |
854 | data->rvlt_handle = ret; | |
855 | ||
856 | /* RFAN: read fan status */ | |
857 | status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret); | |
858 | if (status != AE_OK) { | |
859 | dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n", | |
860 | acpi_format_exception(status)); | |
861 | return -ENODEV; | |
862 | } | |
863 | data->rfan_handle = ret; | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
868 | static int atk_check_new_if(struct atk_data *data) | |
869 | { | |
870 | struct device *dev = &data->acpi_dev->dev; | |
871 | acpi_handle ret; | |
872 | acpi_status status; | |
873 | ||
874 | /* Enumeration */ | |
875 | status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret); | |
876 | if (status != AE_OK) { | |
877 | dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n", | |
878 | acpi_format_exception(status)); | |
879 | return -ENODEV; | |
880 | } | |
881 | data->enumerate_handle = ret; | |
882 | ||
883 | /* De-multiplexer (read) */ | |
884 | status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret); | |
885 | if (status != AE_OK) { | |
886 | dev_dbg(dev, "method " METHOD_READ " not found: %s\n", | |
887 | acpi_format_exception(status)); | |
888 | return -ENODEV; | |
889 | } | |
890 | data->read_handle = ret; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static int atk_add(struct acpi_device *device) | |
896 | { | |
897 | acpi_status ret; | |
898 | int err; | |
899 | struct acpi_buffer buf; | |
900 | union acpi_object *obj; | |
901 | struct atk_data *data; | |
902 | ||
903 | dev_dbg(&device->dev, "adding...\n"); | |
904 | ||
905 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
906 | if (!data) | |
907 | return -ENOMEM; | |
908 | ||
909 | data->acpi_dev = device; | |
910 | data->atk_handle = device->handle; | |
911 | INIT_LIST_HEAD(&data->sensor_list); | |
912 | ||
913 | buf.length = ACPI_ALLOCATE_BUFFER; | |
914 | ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL, | |
915 | &buf, ACPI_TYPE_PACKAGE); | |
916 | if (ret != AE_OK) { | |
917 | dev_dbg(&device->dev, "atk: method MBIF not found\n"); | |
918 | err = -ENODEV; | |
919 | goto out; | |
920 | } | |
921 | ||
922 | obj = buf.pointer; | |
923 | if (obj->package.count >= 2 && | |
924 | obj->package.elements[1].type == ACPI_TYPE_STRING) { | |
925 | dev_dbg(&device->dev, "board ID = %s\n", | |
926 | obj->package.elements[1].string.pointer); | |
927 | } | |
928 | ACPI_FREE(buf.pointer); | |
929 | ||
930 | /* Check for hwmon methods: first check "old" style methods; note that | |
931 | * both may be present: in this case we stick to the old interface; | |
932 | * analysis of multiple DSDTs indicates that when both interfaces | |
933 | * are present the new one (GGRP/GITM) is not functional. | |
934 | */ | |
935 | err = atk_check_old_if(data); | |
936 | if (!err) { | |
937 | dev_dbg(&device->dev, "Using old hwmon interface\n"); | |
938 | data->old_interface = true; | |
939 | } else { | |
940 | err = atk_check_new_if(data); | |
941 | if (err) | |
942 | goto out; | |
943 | ||
944 | dev_dbg(&device->dev, "Using new hwmon interface\n"); | |
945 | data->old_interface = false; | |
946 | } | |
947 | ||
948 | if (data->old_interface) | |
949 | err = atk_enumerate_old_hwmon(data); | |
950 | else | |
951 | err = atk_enumerate_new_hwmon(data); | |
952 | if (err < 0) | |
953 | goto out; | |
954 | if (err == 0) { | |
955 | dev_info(&device->dev, | |
956 | "No usable sensor detected, bailing out\n"); | |
957 | err = -ENODEV; | |
958 | goto out; | |
959 | } | |
960 | ||
961 | err = atk_register_hwmon(data); | |
962 | if (err) | |
963 | goto cleanup; | |
964 | ||
965 | device->driver_data = data; | |
966 | return 0; | |
967 | cleanup: | |
968 | atk_free_sensors(data); | |
969 | out: | |
970 | kfree(data); | |
971 | return err; | |
972 | } | |
973 | ||
974 | static int atk_remove(struct acpi_device *device, int type) | |
975 | { | |
976 | struct atk_data *data = device->driver_data; | |
977 | dev_dbg(&device->dev, "removing...\n"); | |
978 | ||
979 | device->driver_data = NULL; | |
980 | ||
981 | atk_remove_files(data); | |
982 | atk_free_sensors(data); | |
983 | hwmon_device_unregister(data->hwmon_dev); | |
984 | ||
985 | kfree(data); | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
990 | static int __init atk0110_init(void) | |
991 | { | |
992 | int ret; | |
993 | ||
994 | ret = acpi_bus_register_driver(&atk_driver); | |
995 | if (ret) | |
996 | pr_info("atk: acpi_bus_register_driver failed: %d\n", ret); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static void __exit atk0110_exit(void) | |
1002 | { | |
1003 | acpi_bus_unregister_driver(&atk_driver); | |
1004 | } | |
1005 | ||
1006 | module_init(atk0110_init); | |
1007 | module_exit(atk0110_exit); | |
1008 | ||
1009 | MODULE_LICENSE("GPL"); |