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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
21 #define ATK_HID "ATK0110"
24 module_param(new_if, bool, 0);
25 MODULE_PARM_DESC(new_if, "Override detection heuristic and force the use of the new ATK0110 interface");
27 static const struct dmi_system_id __initconst atk_force_new_if[] = {
29 /* Old interface has broken MCH temp monitoring */
30 .ident = "Asus Sabertooth X58",
32 DMI_MATCH(DMI_BOARD_NAME, "SABERTOOTH X58")
35 /* Old interface reads the same sensor for fan0 and fan1 */
36 .ident = "Asus M5A78L",
38 DMI_MATCH(DMI_BOARD_NAME, "M5A78L")
45 * Minimum time between readings, enforced in order to avoid
50 #define BOARD_ID "MBIF"
51 #define METHOD_ENUMERATE "GGRP"
52 #define METHOD_READ "GITM"
53 #define METHOD_WRITE "SITM"
54 #define METHOD_OLD_READ_TMP "RTMP"
55 #define METHOD_OLD_READ_VLT "RVLT"
56 #define METHOD_OLD_READ_FAN "RFAN"
57 #define METHOD_OLD_ENUM_TMP "TSIF"
58 #define METHOD_OLD_ENUM_VLT "VSIF"
59 #define METHOD_OLD_ENUM_FAN "FSIF"
61 #define ATK_MUX_HWMON 0x00000006ULL
62 #define ATK_MUX_MGMT 0x00000011ULL
64 #define ATK_CLASS_MASK 0xff000000ULL
65 #define ATK_CLASS_FREQ_CTL 0x03000000ULL
66 #define ATK_CLASS_FAN_CTL 0x04000000ULL
67 #define ATK_CLASS_HWMON 0x06000000ULL
68 #define ATK_CLASS_MGMT 0x11000000ULL
70 #define ATK_TYPE_MASK 0x00ff0000ULL
71 #define HWMON_TYPE_VOLT 0x00020000ULL
72 #define HWMON_TYPE_TEMP 0x00030000ULL
73 #define HWMON_TYPE_FAN 0x00040000ULL
75 #define ATK_ELEMENT_ID_MASK 0x0000ffffULL
77 #define ATK_EC_ID 0x11060004ULL
79 enum atk_pack_member {
87 /* New package format */
88 #define _HWMON_NEW_PACK_SIZE 7
89 #define _HWMON_NEW_PACK_FLAGS 0
90 #define _HWMON_NEW_PACK_NAME 1
91 #define _HWMON_NEW_PACK_UNK1 2
92 #define _HWMON_NEW_PACK_UNK2 3
93 #define _HWMON_NEW_PACK_LIMIT1 4
94 #define _HWMON_NEW_PACK_LIMIT2 5
95 #define _HWMON_NEW_PACK_ENABLE 6
97 /* Old package format */
98 #define _HWMON_OLD_PACK_SIZE 5
99 #define _HWMON_OLD_PACK_FLAGS 0
100 #define _HWMON_OLD_PACK_NAME 1
101 #define _HWMON_OLD_PACK_LIMIT1 2
102 #define _HWMON_OLD_PACK_LIMIT2 3
103 #define _HWMON_OLD_PACK_ENABLE 4
107 struct device *hwmon_dev;
108 acpi_handle atk_handle;
109 struct acpi_device *acpi_dev;
114 acpi_handle rtmp_handle;
115 acpi_handle rvlt_handle;
116 acpi_handle rfan_handle;
118 acpi_handle enumerate_handle;
119 acpi_handle read_handle;
120 acpi_handle write_handle;
125 int temperature_count;
127 struct list_head sensor_list;
136 typedef ssize_t (*sysfs_show_func)(struct device *dev,
137 struct device_attribute *attr, char *buf);
139 static const struct acpi_device_id atk_ids[] = {
143 MODULE_DEVICE_TABLE(acpi, atk_ids);
145 #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
147 struct atk_sensor_data {
148 struct list_head list;
149 struct atk_data *data;
150 struct device_attribute label_attr;
151 struct device_attribute input_attr;
152 struct device_attribute limit1_attr;
153 struct device_attribute limit2_attr;
154 char label_attr_name[ATTR_NAME_SIZE];
155 char input_attr_name[ATTR_NAME_SIZE];
156 char limit1_attr_name[ATTR_NAME_SIZE];
157 char limit2_attr_name[ATTR_NAME_SIZE];
163 unsigned long last_updated; /* in jiffies */
165 char const *acpi_name;
169 * Return buffer format:
170 * [0-3] "value" is valid flag
172 * [8- ] unknown stuff on newer mobos
174 struct atk_acpi_ret_buffer {
180 /* Input buffer used for GITM and SITM methods */
181 struct atk_acpi_input_buf {
187 static int atk_add(struct acpi_device *device);
188 static int atk_remove(struct acpi_device *device);
189 static void atk_print_sensor(struct atk_data *data, union acpi_object *obj);
190 static int atk_read_value(struct atk_sensor_data *sensor, u64 *value);
191 static void atk_free_sensors(struct atk_data *data);
193 static struct acpi_driver atk_driver = {
199 .remove = atk_remove,
203 #define input_to_atk_sensor(attr) \
204 container_of(attr, struct atk_sensor_data, input_attr)
206 #define label_to_atk_sensor(attr) \
207 container_of(attr, struct atk_sensor_data, label_attr)
209 #define limit1_to_atk_sensor(attr) \
210 container_of(attr, struct atk_sensor_data, limit1_attr)
212 #define limit2_to_atk_sensor(attr) \
213 container_of(attr, struct atk_sensor_data, limit2_attr)
215 static ssize_t atk_input_show(struct device *dev,
216 struct device_attribute *attr, char *buf)
218 struct atk_sensor_data *s = input_to_atk_sensor(attr);
222 err = atk_read_value(s, &value);
226 if (s->type == HWMON_TYPE_TEMP)
227 /* ACPI returns decidegree */
230 return sprintf(buf, "%llu\n", value);
233 static ssize_t atk_label_show(struct device *dev,
234 struct device_attribute *attr, char *buf)
236 struct atk_sensor_data *s = label_to_atk_sensor(attr);
238 return sprintf(buf, "%s\n", s->acpi_name);
241 static ssize_t atk_limit1_show(struct device *dev,
242 struct device_attribute *attr, char *buf)
244 struct atk_sensor_data *s = limit1_to_atk_sensor(attr);
245 u64 value = s->limit1;
247 if (s->type == HWMON_TYPE_TEMP)
250 return sprintf(buf, "%lld\n", value);
253 static ssize_t atk_limit2_show(struct device *dev,
254 struct device_attribute *attr, char *buf)
256 struct atk_sensor_data *s = limit2_to_atk_sensor(attr);
257 u64 value = s->limit2;
259 if (s->type == HWMON_TYPE_TEMP)
262 return sprintf(buf, "%lld\n", value);
265 static ssize_t atk_name_show(struct device *dev,
266 struct device_attribute *attr, char *buf)
268 return sprintf(buf, "atk0110\n");
270 static struct device_attribute atk_name_attr =
271 __ATTR(name, 0444, atk_name_show, NULL);
273 static void atk_init_attribute(struct device_attribute *attr, char *name,
274 sysfs_show_func show)
276 sysfs_attr_init(&attr->attr);
277 attr->attr.name = name;
278 attr->attr.mode = 0444;
284 static union acpi_object *atk_get_pack_member(struct atk_data *data,
285 union acpi_object *pack,
286 enum atk_pack_member m)
288 bool old_if = data->old_interface;
292 case HWMON_PACK_FLAGS:
293 offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS;
295 case HWMON_PACK_NAME:
296 offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME;
298 case HWMON_PACK_LIMIT1:
299 offset = old_if ? _HWMON_OLD_PACK_LIMIT1 :
300 _HWMON_NEW_PACK_LIMIT1;
302 case HWMON_PACK_LIMIT2:
303 offset = old_if ? _HWMON_OLD_PACK_LIMIT2 :
304 _HWMON_NEW_PACK_LIMIT2;
306 case HWMON_PACK_ENABLE:
307 offset = old_if ? _HWMON_OLD_PACK_ENABLE :
308 _HWMON_NEW_PACK_ENABLE;
314 return &pack->package.elements[offset];
319 * New package format is:
321 * class - used for de-muxing the request to the correct GITn
322 * type (volt, temp, fan)
324 * sensor id - used for de-muxing the request _inside_ the GITn
332 * The old package has the same format but it's missing the two unknown fields.
334 static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj)
336 struct device *dev = &data->acpi_dev->dev;
337 union acpi_object *tmp;
338 bool old_if = data->old_interface;
339 int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE :
340 _HWMON_NEW_PACK_SIZE;
342 if (obj->type != ACPI_TYPE_PACKAGE) {
343 dev_warn(dev, "Invalid type: %d\n", obj->type);
347 if (obj->package.count != expected_size) {
348 dev_warn(dev, "Invalid package size: %d, expected: %d\n",
349 obj->package.count, expected_size);
353 tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
354 if (tmp->type != ACPI_TYPE_INTEGER) {
355 dev_warn(dev, "Invalid type (flag): %d\n", tmp->type);
359 tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
360 if (tmp->type != ACPI_TYPE_STRING) {
361 dev_warn(dev, "Invalid type (name): %d\n", tmp->type);
365 /* Don't check... we don't know what they're useful for anyway */
367 tmp = &obj->package.elements[HWMON_PACK_UNK1];
368 if (tmp->type != ACPI_TYPE_INTEGER) {
369 dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type);
373 tmp = &obj->package.elements[HWMON_PACK_UNK2];
374 if (tmp->type != ACPI_TYPE_INTEGER) {
375 dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type);
380 tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
381 if (tmp->type != ACPI_TYPE_INTEGER) {
382 dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type);
386 tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
387 if (tmp->type != ACPI_TYPE_INTEGER) {
388 dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type);
392 tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
393 if (tmp->type != ACPI_TYPE_INTEGER) {
394 dev_warn(dev, "Invalid type (enable): %d\n", tmp->type);
398 atk_print_sensor(data, obj);
404 static char const *atk_sensor_type(union acpi_object *flags)
406 u64 type = flags->integer.value & ATK_TYPE_MASK;
410 case HWMON_TYPE_VOLT:
413 case HWMON_TYPE_TEMP:
414 what = "temperature";
428 static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
431 struct device *dev = &data->acpi_dev->dev;
432 union acpi_object *flags;
433 union acpi_object *name;
434 union acpi_object *limit1;
435 union acpi_object *limit2;
436 union acpi_object *enable;
439 flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
440 name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
441 limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
442 limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
443 enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
445 what = atk_sensor_type(flags);
447 dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what,
448 flags->integer.value,
449 name->string.pointer,
450 limit1->integer.value, limit2->integer.value,
451 enable->integer.value ? "enabled" : "disabled");
455 static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
457 struct atk_data *data = sensor->data;
458 struct device *dev = &data->acpi_dev->dev;
459 struct acpi_object_list params;
460 union acpi_object id;
464 switch (sensor->type) {
465 case HWMON_TYPE_VOLT:
466 method = data->rvlt_handle;
468 case HWMON_TYPE_TEMP:
469 method = data->rtmp_handle;
472 method = data->rfan_handle;
478 id.type = ACPI_TYPE_INTEGER;
479 id.integer.value = sensor->id;
482 params.pointer = &id;
484 status = acpi_evaluate_integer(method, NULL, ¶ms, value);
485 if (status != AE_OK) {
486 dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
487 acpi_format_exception(status));
494 static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux)
496 struct device *dev = &data->acpi_dev->dev;
497 struct acpi_buffer buf;
499 struct acpi_object_list params;
500 union acpi_object id;
501 union acpi_object *pack;
503 id.type = ACPI_TYPE_INTEGER;
504 id.integer.value = mux;
506 params.pointer = &id;
508 buf.length = ACPI_ALLOCATE_BUFFER;
509 ret = acpi_evaluate_object(data->enumerate_handle, NULL, ¶ms, &buf);
511 dev_err(dev, "GGRP[%#x] ACPI exception: %s\n", mux,
512 acpi_format_exception(ret));
513 return ERR_PTR(-EIO);
516 if (pack->type != ACPI_TYPE_PACKAGE) {
517 /* Execution was successful, but the id was not found */
519 return ERR_PTR(-ENOENT);
522 if (pack->package.count < 1) {
523 dev_err(dev, "GGRP[%#x] package is too small\n", mux);
525 return ERR_PTR(-EIO);
530 static union acpi_object *atk_gitm(struct atk_data *data, u64 id)
532 struct device *dev = &data->acpi_dev->dev;
533 struct atk_acpi_input_buf buf;
534 union acpi_object tmp;
535 struct acpi_object_list params;
536 struct acpi_buffer ret;
537 union acpi_object *obj;
544 tmp.type = ACPI_TYPE_BUFFER;
545 tmp.buffer.pointer = (u8 *)&buf;
546 tmp.buffer.length = sizeof(buf);
549 params.pointer = (void *)&tmp;
551 ret.length = ACPI_ALLOCATE_BUFFER;
552 status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms,
553 &ret, ACPI_TYPE_BUFFER);
554 if (status != AE_OK) {
555 dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id,
556 acpi_format_exception(status));
557 return ERR_PTR(-EIO);
562 if (obj->buffer.length < 8) {
563 dev_warn(dev, "Unexpected ASBF length: %u\n",
566 return ERR_PTR(-EIO);
571 static union acpi_object *atk_sitm(struct atk_data *data,
572 struct atk_acpi_input_buf *buf)
574 struct device *dev = &data->acpi_dev->dev;
575 struct acpi_object_list params;
576 union acpi_object tmp;
577 struct acpi_buffer ret;
578 union acpi_object *obj;
581 tmp.type = ACPI_TYPE_BUFFER;
582 tmp.buffer.pointer = (u8 *)buf;
583 tmp.buffer.length = sizeof(*buf);
586 params.pointer = &tmp;
588 ret.length = ACPI_ALLOCATE_BUFFER;
589 status = acpi_evaluate_object_typed(data->write_handle, NULL, ¶ms,
590 &ret, ACPI_TYPE_BUFFER);
591 if (status != AE_OK) {
592 dev_warn(dev, "SITM[%#x] ACPI exception: %s\n", buf->id,
593 acpi_format_exception(status));
594 return ERR_PTR(-EIO);
599 if (obj->buffer.length < 8) {
600 dev_warn(dev, "Unexpected ASBF length: %u\n",
603 return ERR_PTR(-EIO);
608 static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
610 struct atk_data *data = sensor->data;
611 struct device *dev = &data->acpi_dev->dev;
612 union acpi_object *obj;
613 struct atk_acpi_ret_buffer *buf;
616 obj = atk_gitm(data, sensor->id);
620 buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
621 if (buf->flags == 0) {
623 * The reading is not valid, possible causes:
625 * - enumeration was FUBAR (and we didn't notice)
627 dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id);
638 static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
642 if (!sensor->is_valid ||
643 time_after(jiffies, sensor->last_updated + CACHE_TIME)) {
644 if (sensor->data->old_interface)
645 err = atk_read_value_old(sensor, value);
647 err = atk_read_value_new(sensor, value);
649 sensor->is_valid = true;
650 sensor->last_updated = jiffies;
651 sensor->cached_value = *value;
653 *value = sensor->cached_value;
660 #ifdef CONFIG_DEBUG_FS
661 static int atk_debugfs_gitm_get(void *p, u64 *val)
663 struct atk_data *data = p;
664 union acpi_object *ret;
665 struct atk_acpi_ret_buffer *buf;
668 if (!data->read_handle)
671 if (!data->debugfs.id)
674 ret = atk_gitm(data, data->debugfs.id);
678 buf = (struct atk_acpi_ret_buffer *)ret->buffer.pointer;
688 DEFINE_SIMPLE_ATTRIBUTE(atk_debugfs_gitm,
689 atk_debugfs_gitm_get,
693 static int atk_acpi_print(char *buf, size_t sz, union acpi_object *obj)
698 case ACPI_TYPE_INTEGER:
699 ret = snprintf(buf, sz, "0x%08llx\n", obj->integer.value);
701 case ACPI_TYPE_STRING:
702 ret = snprintf(buf, sz, "%s\n", obj->string.pointer);
709 static void atk_pack_print(char *buf, size_t sz, union acpi_object *pack)
714 for (i = 0; i < pack->package.count; i++) {
715 union acpi_object *obj = &pack->package.elements[i];
717 ret = atk_acpi_print(buf, sz, obj);
725 static int atk_debugfs_ggrp_open(struct inode *inode, struct file *file)
727 struct atk_data *data = inode->i_private;
729 union acpi_object *ret;
733 if (!data->enumerate_handle)
735 if (!data->debugfs.id)
738 cls = (data->debugfs.id & 0xff000000) >> 24;
739 ret = atk_ggrp(data, cls);
743 for (i = 0; i < ret->package.count; i++) {
744 union acpi_object *pack = &ret->package.elements[i];
745 union acpi_object *id;
747 if (pack->type != ACPI_TYPE_PACKAGE)
749 if (!pack->package.count)
751 id = &pack->package.elements[0];
752 if (id->integer.value == data->debugfs.id) {
753 /* Print the package */
754 buf = kzalloc(512, GFP_KERNEL);
759 atk_pack_print(buf, 512, pack);
768 file->private_data = buf;
770 return nonseekable_open(inode, file);
773 static ssize_t atk_debugfs_ggrp_read(struct file *file, char __user *buf,
774 size_t count, loff_t *pos)
776 char *str = file->private_data;
777 size_t len = strlen(str);
779 return simple_read_from_buffer(buf, count, pos, str, len);
782 static int atk_debugfs_ggrp_release(struct inode *inode, struct file *file)
784 kfree(file->private_data);
788 static const struct file_operations atk_debugfs_ggrp_fops = {
789 .read = atk_debugfs_ggrp_read,
790 .open = atk_debugfs_ggrp_open,
791 .release = atk_debugfs_ggrp_release,
795 static void atk_debugfs_init(struct atk_data *data)
800 data->debugfs.id = 0;
802 d = debugfs_create_dir("asus_atk0110", NULL);
806 f = debugfs_create_x32("id", S_IRUSR | S_IWUSR, d, &data->debugfs.id);
810 f = debugfs_create_file("gitm", S_IRUSR, d, data,
815 f = debugfs_create_file("ggrp", S_IRUSR, d, data,
816 &atk_debugfs_ggrp_fops);
820 data->debugfs.root = d;
824 debugfs_remove_recursive(d);
827 static void atk_debugfs_cleanup(struct atk_data *data)
829 debugfs_remove_recursive(data->debugfs.root);
832 #else /* CONFIG_DEBUG_FS */
834 static void atk_debugfs_init(struct atk_data *data)
838 static void atk_debugfs_cleanup(struct atk_data *data)
843 static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
845 struct device *dev = &data->acpi_dev->dev;
846 union acpi_object *flags;
847 union acpi_object *name;
848 union acpi_object *limit1;
849 union acpi_object *limit2;
850 union acpi_object *enable;
851 struct atk_sensor_data *sensor;
852 char const *base_name;
853 char const *limit1_name;
854 char const *limit2_name;
860 if (obj->type != ACPI_TYPE_PACKAGE) {
862 dev_warn(dev, "Unknown type for ACPI object: (%d)\n",
867 err = validate_hwmon_pack(data, obj);
871 /* Ok, we have a valid hwmon package */
872 type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value
876 case HWMON_TYPE_VOLT:
880 num = &data->voltage_count;
883 case HWMON_TYPE_TEMP:
886 limit2_name = "crit";
887 num = &data->temperature_count;
894 num = &data->fan_count;
898 dev_warn(dev, "Unknown sensor type: %#llx\n", type);
902 enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
903 if (!enable->integer.value)
904 /* sensor is disabled */
907 flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
908 name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
909 limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
910 limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
912 sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
916 sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL);
917 if (!sensor->acpi_name) {
922 INIT_LIST_HEAD(&sensor->list);
925 sensor->id = flags->integer.value;
926 sensor->limit1 = limit1->integer.value;
927 if (data->old_interface)
928 sensor->limit2 = limit2->integer.value;
930 /* The upper limit is expressed as delta from lower limit */
931 sensor->limit2 = sensor->limit1 + limit2->integer.value;
933 snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
934 "%s%d_input", base_name, start + *num);
935 atk_init_attribute(&sensor->input_attr,
936 sensor->input_attr_name,
939 snprintf(sensor->label_attr_name, ATTR_NAME_SIZE,
940 "%s%d_label", base_name, start + *num);
941 atk_init_attribute(&sensor->label_attr,
942 sensor->label_attr_name,
945 snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE,
946 "%s%d_%s", base_name, start + *num, limit1_name);
947 atk_init_attribute(&sensor->limit1_attr,
948 sensor->limit1_attr_name,
951 snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE,
952 "%s%d_%s", base_name, start + *num, limit2_name);
953 atk_init_attribute(&sensor->limit2_attr,
954 sensor->limit2_attr_name,
957 list_add(&sensor->list, &data->sensor_list);
966 static int atk_enumerate_old_hwmon(struct atk_data *data)
968 struct device *dev = &data->acpi_dev->dev;
969 struct acpi_buffer buf;
970 union acpi_object *pack;
976 buf.length = ACPI_ALLOCATE_BUFFER;
977 status = acpi_evaluate_object_typed(data->atk_handle,
978 METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE);
979 if (status != AE_OK) {
980 dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n",
981 acpi_format_exception(status));
987 for (i = 1; i < pack->package.count; i++) {
988 union acpi_object *obj = &pack->package.elements[i];
990 ret = atk_add_sensor(data, obj);
994 ACPI_FREE(buf.pointer);
997 buf.length = ACPI_ALLOCATE_BUFFER;
998 status = acpi_evaluate_object_typed(data->atk_handle,
999 METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE);
1000 if (status != AE_OK) {
1001 dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n",
1002 acpi_format_exception(status));
1009 for (i = 1; i < pack->package.count; i++) {
1010 union acpi_object *obj = &pack->package.elements[i];
1012 ret = atk_add_sensor(data, obj);
1016 ACPI_FREE(buf.pointer);
1019 buf.length = ACPI_ALLOCATE_BUFFER;
1020 status = acpi_evaluate_object_typed(data->atk_handle,
1021 METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE);
1022 if (status != AE_OK) {
1023 dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n",
1024 acpi_format_exception(status));
1031 for (i = 1; i < pack->package.count; i++) {
1032 union acpi_object *obj = &pack->package.elements[i];
1034 ret = atk_add_sensor(data, obj);
1038 ACPI_FREE(buf.pointer);
1042 atk_free_sensors(data);
1046 static int atk_ec_present(struct atk_data *data)
1048 struct device *dev = &data->acpi_dev->dev;
1049 union acpi_object *pack;
1050 union acpi_object *ec;
1054 pack = atk_ggrp(data, ATK_MUX_MGMT);
1056 if (PTR_ERR(pack) == -ENOENT) {
1057 /* The MGMT class does not exists - that's ok */
1058 dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT);
1061 return PTR_ERR(pack);
1066 for (i = 0; i < pack->package.count; i++) {
1067 union acpi_object *obj = &pack->package.elements[i];
1068 union acpi_object *id;
1070 if (obj->type != ACPI_TYPE_PACKAGE)
1073 id = &obj->package.elements[0];
1074 if (id->type != ACPI_TYPE_INTEGER)
1077 if (id->integer.value == ATK_EC_ID) {
1085 /* The system has no EC */
1086 dev_dbg(dev, "EC not found\n");
1092 static int atk_ec_enabled(struct atk_data *data)
1094 struct device *dev = &data->acpi_dev->dev;
1095 union acpi_object *obj;
1096 struct atk_acpi_ret_buffer *buf;
1099 obj = atk_gitm(data, ATK_EC_ID);
1101 dev_err(dev, "Unable to query EC status\n");
1102 return PTR_ERR(obj);
1104 buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
1106 if (buf->flags == 0) {
1107 dev_err(dev, "Unable to query EC status\n");
1110 err = (buf->value != 0);
1111 dev_dbg(dev, "EC is %sabled\n",
1112 err ? "en" : "dis");
1119 static int atk_ec_ctl(struct atk_data *data, int enable)
1121 struct device *dev = &data->acpi_dev->dev;
1122 union acpi_object *obj;
1123 struct atk_acpi_input_buf sitm;
1124 struct atk_acpi_ret_buffer *ec_ret;
1127 sitm.id = ATK_EC_ID;
1128 sitm.param1 = enable;
1131 obj = atk_sitm(data, &sitm);
1133 dev_err(dev, "Failed to %sable the EC\n",
1134 enable ? "en" : "dis");
1135 return PTR_ERR(obj);
1137 ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
1138 if (ec_ret->flags == 0) {
1139 dev_err(dev, "Failed to %sable the EC\n",
1140 enable ? "en" : "dis");
1143 dev_info(dev, "EC %sabled\n",
1144 enable ? "en" : "dis");
1151 static int atk_enumerate_new_hwmon(struct atk_data *data)
1153 struct device *dev = &data->acpi_dev->dev;
1154 union acpi_object *pack;
1158 err = atk_ec_present(data);
1162 err = atk_ec_enabled(data);
1165 /* If the EC was disabled we will disable it again on unload */
1166 data->disable_ec = err;
1168 err = atk_ec_ctl(data, 1);
1170 data->disable_ec = false;
1175 dev_dbg(dev, "Enumerating hwmon sensors\n");
1177 pack = atk_ggrp(data, ATK_MUX_HWMON);
1179 return PTR_ERR(pack);
1181 for (i = 0; i < pack->package.count; i++) {
1182 union acpi_object *obj = &pack->package.elements[i];
1184 atk_add_sensor(data, obj);
1187 err = data->voltage_count + data->temperature_count + data->fan_count;
1193 static int atk_create_files(struct atk_data *data)
1195 struct atk_sensor_data *s;
1198 list_for_each_entry(s, &data->sensor_list, list) {
1199 err = device_create_file(data->hwmon_dev, &s->input_attr);
1202 err = device_create_file(data->hwmon_dev, &s->label_attr);
1205 err = device_create_file(data->hwmon_dev, &s->limit1_attr);
1208 err = device_create_file(data->hwmon_dev, &s->limit2_attr);
1213 err = device_create_file(data->hwmon_dev, &atk_name_attr);
1218 static void atk_remove_files(struct atk_data *data)
1220 struct atk_sensor_data *s;
1222 list_for_each_entry(s, &data->sensor_list, list) {
1223 device_remove_file(data->hwmon_dev, &s->input_attr);
1224 device_remove_file(data->hwmon_dev, &s->label_attr);
1225 device_remove_file(data->hwmon_dev, &s->limit1_attr);
1226 device_remove_file(data->hwmon_dev, &s->limit2_attr);
1228 device_remove_file(data->hwmon_dev, &atk_name_attr);
1231 static void atk_free_sensors(struct atk_data *data)
1233 struct list_head *head = &data->sensor_list;
1234 struct atk_sensor_data *s, *tmp;
1236 list_for_each_entry_safe(s, tmp, head, list) {
1237 kfree(s->acpi_name);
1242 static int atk_register_hwmon(struct atk_data *data)
1244 struct device *dev = &data->acpi_dev->dev;
1247 dev_dbg(dev, "registering hwmon device\n");
1248 data->hwmon_dev = hwmon_device_register(dev);
1249 if (IS_ERR(data->hwmon_dev))
1250 return PTR_ERR(data->hwmon_dev);
1252 dev_dbg(dev, "populating sysfs directory\n");
1253 err = atk_create_files(data);
1259 /* Cleanup the registered files */
1260 atk_remove_files(data);
1261 hwmon_device_unregister(data->hwmon_dev);
1265 static int atk_probe_if(struct atk_data *data)
1267 struct device *dev = &data->acpi_dev->dev;
1272 /* RTMP: read temperature */
1273 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret);
1274 if (ACPI_SUCCESS(status))
1275 data->rtmp_handle = ret;
1277 dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n",
1278 acpi_format_exception(status));
1280 /* RVLT: read voltage */
1281 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret);
1282 if (ACPI_SUCCESS(status))
1283 data->rvlt_handle = ret;
1285 dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n",
1286 acpi_format_exception(status));
1288 /* RFAN: read fan status */
1289 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret);
1290 if (ACPI_SUCCESS(status))
1291 data->rfan_handle = ret;
1293 dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n",
1294 acpi_format_exception(status));
1297 status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret);
1298 if (ACPI_SUCCESS(status))
1299 data->enumerate_handle = ret;
1301 dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n",
1302 acpi_format_exception(status));
1304 /* De-multiplexer (read) */
1305 status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret);
1306 if (ACPI_SUCCESS(status))
1307 data->read_handle = ret;
1309 dev_dbg(dev, "method " METHOD_READ " not found: %s\n",
1310 acpi_format_exception(status));
1312 /* De-multiplexer (write) */
1313 status = acpi_get_handle(data->atk_handle, METHOD_WRITE, &ret);
1314 if (ACPI_SUCCESS(status))
1315 data->write_handle = ret;
1317 dev_dbg(dev, "method " METHOD_WRITE " not found: %s\n",
1318 acpi_format_exception(status));
1321 * Check for hwmon methods: first check "old" style methods; note that
1322 * both may be present: in this case we stick to the old interface;
1323 * analysis of multiple DSDTs indicates that when both interfaces
1324 * are present the new one (GGRP/GITM) is not functional.
1327 dev_info(dev, "Overriding interface detection\n");
1328 if (data->rtmp_handle &&
1329 data->rvlt_handle && data->rfan_handle && !new_if)
1330 data->old_interface = true;
1331 else if (data->enumerate_handle && data->read_handle &&
1333 data->old_interface = false;
1340 static int atk_add(struct acpi_device *device)
1344 struct acpi_buffer buf;
1345 union acpi_object *obj;
1346 struct atk_data *data;
1348 dev_dbg(&device->dev, "adding...\n");
1350 data = kzalloc(sizeof(*data), GFP_KERNEL);
1354 data->acpi_dev = device;
1355 data->atk_handle = device->handle;
1356 INIT_LIST_HEAD(&data->sensor_list);
1357 data->disable_ec = false;
1359 buf.length = ACPI_ALLOCATE_BUFFER;
1360 ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL,
1361 &buf, ACPI_TYPE_PACKAGE);
1363 dev_dbg(&device->dev, "atk: method MBIF not found\n");
1366 if (obj->package.count >= 2) {
1367 union acpi_object *id = &obj->package.elements[1];
1368 if (id->type == ACPI_TYPE_STRING)
1369 dev_dbg(&device->dev, "board ID = %s\n",
1370 id->string.pointer);
1372 ACPI_FREE(buf.pointer);
1375 err = atk_probe_if(data);
1377 dev_err(&device->dev, "No usable hwmon interface detected\n");
1381 if (data->old_interface) {
1382 dev_dbg(&device->dev, "Using old hwmon interface\n");
1383 err = atk_enumerate_old_hwmon(data);
1385 dev_dbg(&device->dev, "Using new hwmon interface\n");
1386 err = atk_enumerate_new_hwmon(data);
1391 dev_info(&device->dev,
1392 "No usable sensor detected, bailing out\n");
1397 err = atk_register_hwmon(data);
1401 atk_debugfs_init(data);
1403 device->driver_data = data;
1406 atk_free_sensors(data);
1408 if (data->disable_ec)
1409 atk_ec_ctl(data, 0);
1414 static int atk_remove(struct acpi_device *device)
1416 struct atk_data *data = device->driver_data;
1417 dev_dbg(&device->dev, "removing...\n");
1419 device->driver_data = NULL;
1421 atk_debugfs_cleanup(data);
1423 atk_remove_files(data);
1424 atk_free_sensors(data);
1425 hwmon_device_unregister(data->hwmon_dev);
1427 if (data->disable_ec) {
1428 if (atk_ec_ctl(data, 0))
1429 dev_err(&device->dev, "Failed to disable EC\n");
1437 static int __init atk0110_init(void)
1441 /* Make sure it's safe to access the device through ACPI */
1442 if (!acpi_resources_are_enforced()) {
1443 pr_err("Resources not safely usable due to acpi_enforce_resources kernel parameter\n");
1447 if (dmi_check_system(atk_force_new_if))
1450 ret = acpi_bus_register_driver(&atk_driver);
1452 pr_info("acpi_bus_register_driver failed: %d\n", ret);
1457 static void __exit atk0110_exit(void)
1459 acpi_bus_unregister_driver(&atk_driver);
1462 module_init(atk0110_init);
1463 module_exit(atk0110_exit);
1465 MODULE_LICENSE("GPL");