2 * Copyright (C) 2007-2009 Luca Tettamanti <kronos.it@gmail.com>
4 * This file is released under the GPLv2
5 * See COPYING in the top level directory of the kernel tree.
8 #include <linux/debugfs.h>
9 #include <linux/kernel.h>
10 #include <linux/hwmon.h>
11 #include <linux/list.h>
12 #include <linux/module.h>
14 #include <acpi/acpi.h>
15 #include <acpi/acpixf.h>
16 #include <acpi/acpi_drivers.h>
17 #include <acpi/acpi_bus.h>
20 #define ATK_HID "ATK0110"
22 /* Minimum time between readings, enforced in order to avoid
27 #define BOARD_ID "MBIF"
28 #define METHOD_ENUMERATE "GGRP"
29 #define METHOD_READ "GITM"
30 #define METHOD_WRITE "SITM"
31 #define METHOD_OLD_READ_TMP "RTMP"
32 #define METHOD_OLD_READ_VLT "RVLT"
33 #define METHOD_OLD_READ_FAN "RFAN"
34 #define METHOD_OLD_ENUM_TMP "TSIF"
35 #define METHOD_OLD_ENUM_VLT "VSIF"
36 #define METHOD_OLD_ENUM_FAN "FSIF"
38 #define ATK_MUX_HWMON 0x00000006ULL
39 #define ATK_MUX_MGMT 0x00000011ULL
41 #define ATK_CLASS_MASK 0xff000000ULL
42 #define ATK_CLASS_FREQ_CTL 0x03000000ULL
43 #define ATK_CLASS_FAN_CTL 0x04000000ULL
44 #define ATK_CLASS_HWMON 0x06000000ULL
45 #define ATK_CLASS_MGMT 0x11000000ULL
47 #define ATK_TYPE_MASK 0x00ff0000ULL
48 #define HWMON_TYPE_VOLT 0x00020000ULL
49 #define HWMON_TYPE_TEMP 0x00030000ULL
50 #define HWMON_TYPE_FAN 0x00040000ULL
52 #define ATK_ELEMENT_ID_MASK 0x0000ffffULL
54 #define ATK_EC_ID 0x11060004ULL
56 enum atk_pack_member {
64 /* New package format */
65 #define _HWMON_NEW_PACK_SIZE 7
66 #define _HWMON_NEW_PACK_FLAGS 0
67 #define _HWMON_NEW_PACK_NAME 1
68 #define _HWMON_NEW_PACK_UNK1 2
69 #define _HWMON_NEW_PACK_UNK2 3
70 #define _HWMON_NEW_PACK_LIMIT1 4
71 #define _HWMON_NEW_PACK_LIMIT2 5
72 #define _HWMON_NEW_PACK_ENABLE 6
74 /* Old package format */
75 #define _HWMON_OLD_PACK_SIZE 5
76 #define _HWMON_OLD_PACK_FLAGS 0
77 #define _HWMON_OLD_PACK_NAME 1
78 #define _HWMON_OLD_PACK_LIMIT1 2
79 #define _HWMON_OLD_PACK_LIMIT2 3
80 #define _HWMON_OLD_PACK_ENABLE 4
84 struct device *hwmon_dev;
85 acpi_handle atk_handle;
86 struct acpi_device *acpi_dev;
91 acpi_handle rtmp_handle;
92 acpi_handle rvlt_handle;
93 acpi_handle rfan_handle;
95 acpi_handle enumerate_handle;
96 acpi_handle read_handle;
97 acpi_handle write_handle;
102 int temperature_count;
104 struct list_head sensor_list;
113 typedef ssize_t (*sysfs_show_func)(struct device *dev,
114 struct device_attribute *attr, char *buf);
116 static const struct acpi_device_id atk_ids[] = {
120 MODULE_DEVICE_TABLE(acpi, atk_ids);
122 #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
124 struct atk_sensor_data {
125 struct list_head list;
126 struct atk_data *data;
127 struct device_attribute label_attr;
128 struct device_attribute input_attr;
129 struct device_attribute limit1_attr;
130 struct device_attribute limit2_attr;
131 char label_attr_name[ATTR_NAME_SIZE];
132 char input_attr_name[ATTR_NAME_SIZE];
133 char limit1_attr_name[ATTR_NAME_SIZE];
134 char limit2_attr_name[ATTR_NAME_SIZE];
140 unsigned long last_updated; /* in jiffies */
142 char const *acpi_name;
145 /* Return buffer format:
146 * [0-3] "value" is valid flag
148 * [8- ] unknown stuff on newer mobos
150 struct atk_acpi_ret_buffer {
156 /* Input buffer used for GITM and SITM methods */
157 struct atk_acpi_input_buf {
163 static int atk_add(struct acpi_device *device);
164 static int atk_remove(struct acpi_device *device, int type);
165 static void atk_print_sensor(struct atk_data *data, union acpi_object *obj);
166 static int atk_read_value(struct atk_sensor_data *sensor, u64 *value);
167 static void atk_free_sensors(struct atk_data *data);
169 static struct acpi_driver atk_driver = {
175 .remove = atk_remove,
179 #define input_to_atk_sensor(attr) \
180 container_of(attr, struct atk_sensor_data, input_attr)
182 #define label_to_atk_sensor(attr) \
183 container_of(attr, struct atk_sensor_data, label_attr)
185 #define limit1_to_atk_sensor(attr) \
186 container_of(attr, struct atk_sensor_data, limit1_attr)
188 #define limit2_to_atk_sensor(attr) \
189 container_of(attr, struct atk_sensor_data, limit2_attr)
191 static ssize_t atk_input_show(struct device *dev,
192 struct device_attribute *attr, char *buf)
194 struct atk_sensor_data *s = input_to_atk_sensor(attr);
198 err = atk_read_value(s, &value);
202 if (s->type == HWMON_TYPE_TEMP)
203 /* ACPI returns decidegree */
206 return sprintf(buf, "%llu\n", value);
209 static ssize_t atk_label_show(struct device *dev,
210 struct device_attribute *attr, char *buf)
212 struct atk_sensor_data *s = label_to_atk_sensor(attr);
214 return sprintf(buf, "%s\n", s->acpi_name);
217 static ssize_t atk_limit1_show(struct device *dev,
218 struct device_attribute *attr, char *buf)
220 struct atk_sensor_data *s = limit1_to_atk_sensor(attr);
221 u64 value = s->limit1;
223 if (s->type == HWMON_TYPE_TEMP)
226 return sprintf(buf, "%lld\n", value);
229 static ssize_t atk_limit2_show(struct device *dev,
230 struct device_attribute *attr, char *buf)
232 struct atk_sensor_data *s = limit2_to_atk_sensor(attr);
233 u64 value = s->limit2;
235 if (s->type == HWMON_TYPE_TEMP)
238 return sprintf(buf, "%lld\n", value);
241 static ssize_t atk_name_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
244 return sprintf(buf, "atk0110\n");
246 static struct device_attribute atk_name_attr =
247 __ATTR(name, 0444, atk_name_show, NULL);
249 static void atk_init_attribute(struct device_attribute *attr, char *name,
250 sysfs_show_func show)
252 attr->attr.name = name;
253 attr->attr.mode = 0444;
259 static union acpi_object *atk_get_pack_member(struct atk_data *data,
260 union acpi_object *pack,
261 enum atk_pack_member m)
263 bool old_if = data->old_interface;
267 case HWMON_PACK_FLAGS:
268 offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS;
270 case HWMON_PACK_NAME:
271 offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME;
273 case HWMON_PACK_LIMIT1:
274 offset = old_if ? _HWMON_OLD_PACK_LIMIT1 :
275 _HWMON_NEW_PACK_LIMIT1;
277 case HWMON_PACK_LIMIT2:
278 offset = old_if ? _HWMON_OLD_PACK_LIMIT2 :
279 _HWMON_NEW_PACK_LIMIT2;
281 case HWMON_PACK_ENABLE:
282 offset = old_if ? _HWMON_OLD_PACK_ENABLE :
283 _HWMON_NEW_PACK_ENABLE;
289 return &pack->package.elements[offset];
293 /* New package format is:
295 * class - used for de-muxing the request to the correct GITn
296 * type (volt, temp, fan)
298 * sensor id - used for de-muxing the request _inside_ the GITn
306 * The old package has the same format but it's missing the two unknown fields.
308 static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj)
310 struct device *dev = &data->acpi_dev->dev;
311 union acpi_object *tmp;
312 bool old_if = data->old_interface;
313 int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE :
314 _HWMON_NEW_PACK_SIZE;
316 if (obj->type != ACPI_TYPE_PACKAGE) {
317 dev_warn(dev, "Invalid type: %d\n", obj->type);
321 if (obj->package.count != expected_size) {
322 dev_warn(dev, "Invalid package size: %d, expected: %d\n",
323 obj->package.count, expected_size);
327 tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
328 if (tmp->type != ACPI_TYPE_INTEGER) {
329 dev_warn(dev, "Invalid type (flag): %d\n", tmp->type);
333 tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
334 if (tmp->type != ACPI_TYPE_STRING) {
335 dev_warn(dev, "Invalid type (name): %d\n", tmp->type);
339 /* Don't check... we don't know what they're useful for anyway */
341 tmp = &obj->package.elements[HWMON_PACK_UNK1];
342 if (tmp->type != ACPI_TYPE_INTEGER) {
343 dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type);
347 tmp = &obj->package.elements[HWMON_PACK_UNK2];
348 if (tmp->type != ACPI_TYPE_INTEGER) {
349 dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type);
354 tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
355 if (tmp->type != ACPI_TYPE_INTEGER) {
356 dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type);
360 tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
361 if (tmp->type != ACPI_TYPE_INTEGER) {
362 dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type);
366 tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
367 if (tmp->type != ACPI_TYPE_INTEGER) {
368 dev_warn(dev, "Invalid type (enable): %d\n", tmp->type);
372 atk_print_sensor(data, obj);
378 static char const *atk_sensor_type(union acpi_object *flags)
380 u64 type = flags->integer.value & ATK_TYPE_MASK;
384 case HWMON_TYPE_VOLT:
387 case HWMON_TYPE_TEMP:
388 what = "temperature";
402 static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
405 struct device *dev = &data->acpi_dev->dev;
406 union acpi_object *flags;
407 union acpi_object *name;
408 union acpi_object *limit1;
409 union acpi_object *limit2;
410 union acpi_object *enable;
413 flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
414 name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
415 limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
416 limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
417 enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
419 what = atk_sensor_type(flags);
421 dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what,
422 flags->integer.value,
423 name->string.pointer,
424 limit1->integer.value, limit2->integer.value,
425 enable->integer.value ? "enabled" : "disabled");
429 static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
431 struct atk_data *data = sensor->data;
432 struct device *dev = &data->acpi_dev->dev;
433 struct acpi_object_list params;
434 union acpi_object id;
438 switch (sensor->type) {
439 case HWMON_TYPE_VOLT:
440 method = data->rvlt_handle;
442 case HWMON_TYPE_TEMP:
443 method = data->rtmp_handle;
446 method = data->rfan_handle;
452 id.type = ACPI_TYPE_INTEGER;
453 id.integer.value = sensor->id;
456 params.pointer = &id;
458 status = acpi_evaluate_integer(method, NULL, ¶ms, value);
459 if (status != AE_OK) {
460 dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
461 acpi_format_exception(status));
468 static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux)
470 struct device *dev = &data->acpi_dev->dev;
471 struct acpi_buffer buf;
473 struct acpi_object_list params;
474 union acpi_object id;
475 union acpi_object *pack;
477 id.type = ACPI_TYPE_INTEGER;
478 id.integer.value = mux;
480 params.pointer = &id;
482 buf.length = ACPI_ALLOCATE_BUFFER;
483 ret = acpi_evaluate_object(data->enumerate_handle, NULL, ¶ms, &buf);
485 dev_err(dev, "GGRP[%#x] ACPI exception: %s\n", mux,
486 acpi_format_exception(ret));
487 return ERR_PTR(-EIO);
490 if (pack->type != ACPI_TYPE_PACKAGE) {
491 /* Execution was successful, but the id was not found */
493 return ERR_PTR(-ENOENT);
496 if (pack->package.count < 1) {
497 dev_err(dev, "GGRP[%#x] package is too small\n", mux);
499 return ERR_PTR(-EIO);
504 static union acpi_object *atk_gitm(struct atk_data *data, u64 id)
506 struct device *dev = &data->acpi_dev->dev;
507 struct atk_acpi_input_buf buf;
508 union acpi_object tmp;
509 struct acpi_object_list params;
510 struct acpi_buffer ret;
511 union acpi_object *obj;
518 tmp.type = ACPI_TYPE_BUFFER;
519 tmp.buffer.pointer = (u8 *)&buf;
520 tmp.buffer.length = sizeof(buf);
523 params.pointer = (void *)&tmp;
525 ret.length = ACPI_ALLOCATE_BUFFER;
526 status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms,
527 &ret, ACPI_TYPE_BUFFER);
528 if (status != AE_OK) {
529 dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id,
530 acpi_format_exception(status));
531 return ERR_PTR(-EIO);
536 if (obj->buffer.length < 8) {
537 dev_warn(dev, "Unexpected ASBF length: %u\n",
540 return ERR_PTR(-EIO);
545 static union acpi_object *atk_sitm(struct atk_data *data,
546 struct atk_acpi_input_buf *buf)
548 struct device *dev = &data->acpi_dev->dev;
549 struct acpi_object_list params;
550 union acpi_object tmp;
551 struct acpi_buffer ret;
552 union acpi_object *obj;
555 tmp.type = ACPI_TYPE_BUFFER;
556 tmp.buffer.pointer = (u8 *)buf;
557 tmp.buffer.length = sizeof(*buf);
560 params.pointer = &tmp;
562 ret.length = ACPI_ALLOCATE_BUFFER;
563 status = acpi_evaluate_object_typed(data->write_handle, NULL, ¶ms,
564 &ret, ACPI_TYPE_BUFFER);
565 if (status != AE_OK) {
566 dev_warn(dev, "SITM[%#x] ACPI exception: %s\n", buf->id,
567 acpi_format_exception(status));
568 return ERR_PTR(-EIO);
573 if (obj->buffer.length < 8) {
574 dev_warn(dev, "Unexpected ASBF length: %u\n",
577 return ERR_PTR(-EIO);
582 static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
584 struct atk_data *data = sensor->data;
585 struct device *dev = &data->acpi_dev->dev;
586 union acpi_object *obj;
587 struct atk_acpi_ret_buffer *buf;
590 obj = atk_gitm(data, sensor->id);
594 buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
595 if (buf->flags == 0) {
596 /* The reading is not valid, possible causes:
598 * - enumeration was FUBAR (and we didn't notice)
600 dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id);
611 static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
615 if (!sensor->is_valid ||
616 time_after(jiffies, sensor->last_updated + CACHE_TIME)) {
617 if (sensor->data->old_interface)
618 err = atk_read_value_old(sensor, value);
620 err = atk_read_value_new(sensor, value);
622 sensor->is_valid = true;
623 sensor->last_updated = jiffies;
624 sensor->cached_value = *value;
626 *value = sensor->cached_value;
633 #ifdef CONFIG_DEBUG_FS
634 static int atk_debugfs_gitm_get(void *p, u64 *val)
636 struct atk_data *data = p;
637 union acpi_object *ret;
638 struct atk_acpi_ret_buffer *buf;
641 if (!data->read_handle)
644 if (!data->debugfs.id)
647 ret = atk_gitm(data, data->debugfs.id);
651 buf = (struct atk_acpi_ret_buffer *)ret->buffer.pointer;
660 DEFINE_SIMPLE_ATTRIBUTE(atk_debugfs_gitm,
661 atk_debugfs_gitm_get,
665 static int atk_acpi_print(char *buf, size_t sz, union acpi_object *obj)
670 case ACPI_TYPE_INTEGER:
671 ret = snprintf(buf, sz, "0x%08llx\n", obj->integer.value);
673 case ACPI_TYPE_STRING:
674 ret = snprintf(buf, sz, "%s\n", obj->string.pointer);
681 static void atk_pack_print(char *buf, size_t sz, union acpi_object *pack)
686 for (i = 0; i < pack->package.count; i++) {
687 union acpi_object *obj = &pack->package.elements[i];
689 ret = atk_acpi_print(buf, sz, obj);
697 static int atk_debugfs_ggrp_open(struct inode *inode, struct file *file)
699 struct atk_data *data = inode->i_private;
701 union acpi_object *ret;
705 if (!data->enumerate_handle)
707 if (!data->debugfs.id)
710 cls = (data->debugfs.id & 0xff000000) >> 24;
711 ret = atk_ggrp(data, cls);
715 for (i = 0; i < ret->package.count; i++) {
716 union acpi_object *pack = &ret->package.elements[i];
717 union acpi_object *id;
719 if (pack->type != ACPI_TYPE_PACKAGE)
721 if (!pack->package.count)
723 id = &pack->package.elements[0];
724 if (id->integer.value == data->debugfs.id) {
725 /* Print the package */
726 buf = kzalloc(512, GFP_KERNEL);
731 atk_pack_print(buf, 512, pack);
740 file->private_data = buf;
742 return nonseekable_open(inode, file);
745 static ssize_t atk_debugfs_ggrp_read(struct file *file, char __user *buf,
746 size_t count, loff_t *pos)
748 char *str = file->private_data;
749 size_t len = strlen(str);
751 return simple_read_from_buffer(buf, count, pos, str, len);
754 static int atk_debugfs_ggrp_release(struct inode *inode, struct file *file)
756 kfree(file->private_data);
760 static const struct file_operations atk_debugfs_ggrp_fops = {
761 .read = atk_debugfs_ggrp_read,
762 .open = atk_debugfs_ggrp_open,
763 .release = atk_debugfs_ggrp_release,
766 static void atk_debugfs_init(struct atk_data *data)
771 data->debugfs.id = 0;
773 d = debugfs_create_dir("asus_atk0110", NULL);
777 f = debugfs_create_x32("id", S_IRUSR | S_IWUSR, d, &data->debugfs.id);
781 f = debugfs_create_file("gitm", S_IRUSR, d, data,
786 f = debugfs_create_file("ggrp", S_IRUSR, d, data,
787 &atk_debugfs_ggrp_fops);
791 data->debugfs.root = d;
795 debugfs_remove_recursive(d);
798 static void atk_debugfs_cleanup(struct atk_data *data)
800 debugfs_remove_recursive(data->debugfs.root);
803 #else /* CONFIG_DEBUG_FS */
805 static void atk_debugfs_init(struct atk_data *data)
809 static void atk_debugfs_cleanup(struct atk_data *data)
814 static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
816 struct device *dev = &data->acpi_dev->dev;
817 union acpi_object *flags;
818 union acpi_object *name;
819 union acpi_object *limit1;
820 union acpi_object *limit2;
821 union acpi_object *enable;
822 struct atk_sensor_data *sensor;
823 char const *base_name;
824 char const *limit1_name;
825 char const *limit2_name;
831 if (obj->type != ACPI_TYPE_PACKAGE) {
833 dev_warn(dev, "Unknown type for ACPI object: (%d)\n",
838 err = validate_hwmon_pack(data, obj);
842 /* Ok, we have a valid hwmon package */
843 type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value
847 case HWMON_TYPE_VOLT:
851 num = &data->voltage_count;
854 case HWMON_TYPE_TEMP:
857 limit2_name = "crit";
858 num = &data->temperature_count;
865 num = &data->fan_count;
869 dev_warn(dev, "Unknown sensor type: %#llx\n", type);
873 enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
874 if (!enable->integer.value)
875 /* sensor is disabled */
878 flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
879 name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
880 limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
881 limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
883 sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
887 sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL);
888 if (!sensor->acpi_name) {
893 INIT_LIST_HEAD(&sensor->list);
896 sensor->id = flags->integer.value;
897 sensor->limit1 = limit1->integer.value;
898 if (data->old_interface)
899 sensor->limit2 = limit2->integer.value;
901 /* The upper limit is expressed as delta from lower limit */
902 sensor->limit2 = sensor->limit1 + limit2->integer.value;
904 snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
905 "%s%d_input", base_name, start + *num);
906 atk_init_attribute(&sensor->input_attr,
907 sensor->input_attr_name,
910 snprintf(sensor->label_attr_name, ATTR_NAME_SIZE,
911 "%s%d_label", base_name, start + *num);
912 atk_init_attribute(&sensor->label_attr,
913 sensor->label_attr_name,
916 snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE,
917 "%s%d_%s", base_name, start + *num, limit1_name);
918 atk_init_attribute(&sensor->limit1_attr,
919 sensor->limit1_attr_name,
922 snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE,
923 "%s%d_%s", base_name, start + *num, limit2_name);
924 atk_init_attribute(&sensor->limit2_attr,
925 sensor->limit2_attr_name,
928 list_add(&sensor->list, &data->sensor_list);
933 kfree(sensor->acpi_name);
938 static int atk_enumerate_old_hwmon(struct atk_data *data)
940 struct device *dev = &data->acpi_dev->dev;
941 struct acpi_buffer buf;
942 union acpi_object *pack;
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));
959 for (i = 1; i < pack->package.count; i++) {
960 union acpi_object *obj = &pack->package.elements[i];
962 ret = atk_add_sensor(data, obj);
966 ACPI_FREE(buf.pointer);
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));
981 for (i = 1; i < pack->package.count; i++) {
982 union acpi_object *obj = &pack->package.elements[i];
984 ret = atk_add_sensor(data, obj);
988 ACPI_FREE(buf.pointer);
991 buf.length = ACPI_ALLOCATE_BUFFER;
992 status = acpi_evaluate_object_typed(data->atk_handle,
993 METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE);
994 if (status != AE_OK) {
995 dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n",
996 acpi_format_exception(status));
1003 for (i = 1; i < pack->package.count; i++) {
1004 union acpi_object *obj = &pack->package.elements[i];
1006 ret = atk_add_sensor(data, obj);
1010 ACPI_FREE(buf.pointer);
1014 atk_free_sensors(data);
1018 static int atk_ec_present(struct atk_data *data)
1020 struct device *dev = &data->acpi_dev->dev;
1021 union acpi_object *pack;
1022 union acpi_object *ec;
1026 pack = atk_ggrp(data, ATK_MUX_MGMT);
1028 if (PTR_ERR(pack) == -ENOENT) {
1029 /* The MGMT class does not exists - that's ok */
1030 dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT);
1033 return PTR_ERR(pack);
1038 for (i = 0; i < pack->package.count; i++) {
1039 union acpi_object *obj = &pack->package.elements[i];
1040 union acpi_object *id;
1042 if (obj->type != ACPI_TYPE_PACKAGE)
1045 id = &obj->package.elements[0];
1046 if (id->type != ACPI_TYPE_INTEGER)
1049 if (id->integer.value == ATK_EC_ID) {
1057 /* The system has no EC */
1058 dev_dbg(dev, "EC not found\n");
1064 static int atk_ec_enabled(struct atk_data *data)
1066 struct device *dev = &data->acpi_dev->dev;
1067 union acpi_object *obj;
1068 struct atk_acpi_ret_buffer *buf;
1071 obj = atk_gitm(data, ATK_EC_ID);
1073 dev_err(dev, "Unable to query EC status\n");
1074 return PTR_ERR(obj);
1076 buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
1078 if (buf->flags == 0) {
1079 dev_err(dev, "Unable to query EC status\n");
1082 err = (buf->value != 0);
1083 dev_dbg(dev, "EC is %sabled\n",
1084 err ? "en" : "dis");
1091 static int atk_ec_ctl(struct atk_data *data, int enable)
1093 struct device *dev = &data->acpi_dev->dev;
1094 union acpi_object *obj;
1095 struct atk_acpi_input_buf sitm;
1096 struct atk_acpi_ret_buffer *ec_ret;
1099 sitm.id = ATK_EC_ID;
1100 sitm.param1 = enable;
1103 obj = atk_sitm(data, &sitm);
1105 dev_err(dev, "Failed to %sable the EC\n",
1106 enable ? "en" : "dis");
1107 return PTR_ERR(obj);
1109 ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
1110 if (ec_ret->flags == 0) {
1111 dev_err(dev, "Failed to %sable the EC\n",
1112 enable ? "en" : "dis");
1115 dev_info(dev, "EC %sabled\n",
1116 enable ? "en" : "dis");
1123 static int atk_enumerate_new_hwmon(struct atk_data *data)
1125 struct device *dev = &data->acpi_dev->dev;
1126 union acpi_object *pack;
1130 err = atk_ec_present(data);
1134 err = atk_ec_enabled(data);
1137 /* If the EC was disabled we will disable it again on unload */
1138 data->disable_ec = err;
1140 err = atk_ec_ctl(data, 1);
1142 data->disable_ec = false;
1147 dev_dbg(dev, "Enumerating hwmon sensors\n");
1149 pack = atk_ggrp(data, ATK_MUX_HWMON);
1151 return PTR_ERR(pack);
1153 for (i = 0; i < pack->package.count; i++) {
1154 union acpi_object *obj = &pack->package.elements[i];
1156 atk_add_sensor(data, obj);
1159 err = data->voltage_count + data->temperature_count + data->fan_count;
1165 static int atk_create_files(struct atk_data *data)
1167 struct atk_sensor_data *s;
1170 list_for_each_entry(s, &data->sensor_list, list) {
1171 err = device_create_file(data->hwmon_dev, &s->input_attr);
1174 err = device_create_file(data->hwmon_dev, &s->label_attr);
1177 err = device_create_file(data->hwmon_dev, &s->limit1_attr);
1180 err = device_create_file(data->hwmon_dev, &s->limit2_attr);
1185 err = device_create_file(data->hwmon_dev, &atk_name_attr);
1190 static void atk_remove_files(struct atk_data *data)
1192 struct atk_sensor_data *s;
1194 list_for_each_entry(s, &data->sensor_list, list) {
1195 device_remove_file(data->hwmon_dev, &s->input_attr);
1196 device_remove_file(data->hwmon_dev, &s->label_attr);
1197 device_remove_file(data->hwmon_dev, &s->limit1_attr);
1198 device_remove_file(data->hwmon_dev, &s->limit2_attr);
1200 device_remove_file(data->hwmon_dev, &atk_name_attr);
1203 static void atk_free_sensors(struct atk_data *data)
1205 struct list_head *head = &data->sensor_list;
1206 struct atk_sensor_data *s, *tmp;
1208 list_for_each_entry_safe(s, tmp, head, list) {
1209 kfree(s->acpi_name);
1214 static int atk_register_hwmon(struct atk_data *data)
1216 struct device *dev = &data->acpi_dev->dev;
1219 dev_dbg(dev, "registering hwmon device\n");
1220 data->hwmon_dev = hwmon_device_register(dev);
1221 if (IS_ERR(data->hwmon_dev))
1222 return PTR_ERR(data->hwmon_dev);
1224 dev_dbg(dev, "populating sysfs directory\n");
1225 err = atk_create_files(data);
1231 /* Cleanup the registered files */
1232 atk_remove_files(data);
1233 hwmon_device_unregister(data->hwmon_dev);
1237 static int atk_probe_if(struct atk_data *data)
1239 struct device *dev = &data->acpi_dev->dev;
1244 /* RTMP: read temperature */
1245 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret);
1246 if (ACPI_SUCCESS(status))
1247 data->rtmp_handle = ret;
1249 dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n",
1250 acpi_format_exception(status));
1252 /* RVLT: read voltage */
1253 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret);
1254 if (ACPI_SUCCESS(status))
1255 data->rvlt_handle = ret;
1257 dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n",
1258 acpi_format_exception(status));
1260 /* RFAN: read fan status */
1261 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret);
1262 if (ACPI_SUCCESS(status))
1263 data->rfan_handle = ret;
1265 dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n",
1266 acpi_format_exception(status));
1269 status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret);
1270 if (ACPI_SUCCESS(status))
1271 data->enumerate_handle = ret;
1273 dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n",
1274 acpi_format_exception(status));
1276 /* De-multiplexer (read) */
1277 status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret);
1278 if (ACPI_SUCCESS(status))
1279 data->read_handle = ret;
1281 dev_dbg(dev, "method " METHOD_READ " not found: %s\n",
1282 acpi_format_exception(status));
1284 /* De-multiplexer (write) */
1285 status = acpi_get_handle(data->atk_handle, METHOD_WRITE, &ret);
1286 if (ACPI_SUCCESS(status))
1287 data->write_handle = ret;
1289 dev_dbg(dev, "method " METHOD_WRITE " not found: %s\n",
1290 acpi_format_exception(status));
1292 /* Check for hwmon methods: first check "old" style methods; note that
1293 * both may be present: in this case we stick to the old interface;
1294 * analysis of multiple DSDTs indicates that when both interfaces
1295 * are present the new one (GGRP/GITM) is not functional.
1297 if (data->rtmp_handle && data->rvlt_handle && data->rfan_handle)
1298 data->old_interface = true;
1299 else if (data->enumerate_handle && data->read_handle &&
1301 data->old_interface = false;
1308 static int atk_add(struct acpi_device *device)
1312 struct acpi_buffer buf;
1313 union acpi_object *obj;
1314 struct atk_data *data;
1316 dev_dbg(&device->dev, "adding...\n");
1318 data = kzalloc(sizeof(*data), GFP_KERNEL);
1322 data->acpi_dev = device;
1323 data->atk_handle = device->handle;
1324 INIT_LIST_HEAD(&data->sensor_list);
1325 data->disable_ec = false;
1327 buf.length = ACPI_ALLOCATE_BUFFER;
1328 ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL,
1329 &buf, ACPI_TYPE_PACKAGE);
1331 dev_dbg(&device->dev, "atk: method MBIF not found\n");
1337 if (obj->package.count >= 2 &&
1338 obj->package.elements[1].type == ACPI_TYPE_STRING) {
1339 dev_dbg(&device->dev, "board ID = %s\n",
1340 obj->package.elements[1].string.pointer);
1342 ACPI_FREE(buf.pointer);
1344 err = atk_probe_if(data);
1346 dev_err(&device->dev, "No usable hwmon interface detected\n");
1350 if (data->old_interface) {
1351 dev_dbg(&device->dev, "Using old hwmon interface\n");
1352 err = atk_enumerate_old_hwmon(data);
1354 dev_dbg(&device->dev, "Using new hwmon interface\n");
1355 err = atk_enumerate_new_hwmon(data);
1360 dev_info(&device->dev,
1361 "No usable sensor detected, bailing out\n");
1366 err = atk_register_hwmon(data);
1370 atk_debugfs_init(data);
1372 device->driver_data = data;
1375 atk_free_sensors(data);
1377 if (data->disable_ec)
1378 atk_ec_ctl(data, 0);
1383 static int atk_remove(struct acpi_device *device, int type)
1385 struct atk_data *data = device->driver_data;
1386 dev_dbg(&device->dev, "removing...\n");
1388 device->driver_data = NULL;
1390 atk_debugfs_cleanup(data);
1392 atk_remove_files(data);
1393 atk_free_sensors(data);
1394 hwmon_device_unregister(data->hwmon_dev);
1396 if (data->disable_ec) {
1397 if (atk_ec_ctl(data, 0))
1398 dev_err(&device->dev, "Failed to disable EC\n");
1406 static int __init atk0110_init(void)
1410 ret = acpi_bus_register_driver(&atk_driver);
1412 pr_info("atk: acpi_bus_register_driver failed: %d\n", ret);
1417 static void __exit atk0110_exit(void)
1419 acpi_bus_unregister_driver(&atk_driver);
1422 module_init(atk0110_init);
1423 module_exit(atk0110_exit);
1425 MODULE_LICENSE("GPL");