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