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>
18 #include <acpi/acpi.h>
19 #include <acpi/acpixf.h>
20 #include <acpi/acpi_drivers.h>
21 #include <acpi/acpi_bus.h>
24 #define ATK_HID "ATK0110"
27 module_param(new_if, bool, 0);
28 MODULE_PARM_DESC(new_if, "Override detection heuristic and force the use of the new ATK0110 interface");
30 static const struct dmi_system_id __initconst atk_force_new_if[] = {
32 /* Old interface has broken MCH temp monitoring */
33 .ident = "Asus Sabertooth X58",
35 DMI_MATCH(DMI_BOARD_NAME, "SABERTOOTH X58")
38 /* Old interface reads the same sensor for fan0 and fan1 */
39 .ident = "Asus M5A78L",
41 DMI_MATCH(DMI_BOARD_NAME, "M5A78L")
48 * Minimum time between readings, enforced in order to avoid
53 #define BOARD_ID "MBIF"
54 #define METHOD_ENUMERATE "GGRP"
55 #define METHOD_READ "GITM"
56 #define METHOD_WRITE "SITM"
57 #define METHOD_OLD_READ_TMP "RTMP"
58 #define METHOD_OLD_READ_VLT "RVLT"
59 #define METHOD_OLD_READ_FAN "RFAN"
60 #define METHOD_OLD_ENUM_TMP "TSIF"
61 #define METHOD_OLD_ENUM_VLT "VSIF"
62 #define METHOD_OLD_ENUM_FAN "FSIF"
64 #define ATK_MUX_HWMON 0x00000006ULL
65 #define ATK_MUX_MGMT 0x00000011ULL
67 #define ATK_CLASS_MASK 0xff000000ULL
68 #define ATK_CLASS_FREQ_CTL 0x03000000ULL
69 #define ATK_CLASS_FAN_CTL 0x04000000ULL
70 #define ATK_CLASS_HWMON 0x06000000ULL
71 #define ATK_CLASS_MGMT 0x11000000ULL
73 #define ATK_TYPE_MASK 0x00ff0000ULL
74 #define HWMON_TYPE_VOLT 0x00020000ULL
75 #define HWMON_TYPE_TEMP 0x00030000ULL
76 #define HWMON_TYPE_FAN 0x00040000ULL
78 #define ATK_ELEMENT_ID_MASK 0x0000ffffULL
80 #define ATK_EC_ID 0x11060004ULL
82 enum atk_pack_member {
90 /* New package format */
91 #define _HWMON_NEW_PACK_SIZE 7
92 #define _HWMON_NEW_PACK_FLAGS 0
93 #define _HWMON_NEW_PACK_NAME 1
94 #define _HWMON_NEW_PACK_UNK1 2
95 #define _HWMON_NEW_PACK_UNK2 3
96 #define _HWMON_NEW_PACK_LIMIT1 4
97 #define _HWMON_NEW_PACK_LIMIT2 5
98 #define _HWMON_NEW_PACK_ENABLE 6
100 /* Old package format */
101 #define _HWMON_OLD_PACK_SIZE 5
102 #define _HWMON_OLD_PACK_FLAGS 0
103 #define _HWMON_OLD_PACK_NAME 1
104 #define _HWMON_OLD_PACK_LIMIT1 2
105 #define _HWMON_OLD_PACK_LIMIT2 3
106 #define _HWMON_OLD_PACK_ENABLE 4
110 struct device *hwmon_dev;
111 acpi_handle atk_handle;
112 struct acpi_device *acpi_dev;
117 acpi_handle rtmp_handle;
118 acpi_handle rvlt_handle;
119 acpi_handle rfan_handle;
121 acpi_handle enumerate_handle;
122 acpi_handle read_handle;
123 acpi_handle write_handle;
128 int temperature_count;
130 struct list_head sensor_list;
139 typedef ssize_t (*sysfs_show_func)(struct device *dev,
140 struct device_attribute *attr, char *buf);
142 static const struct acpi_device_id atk_ids[] = {
146 MODULE_DEVICE_TABLE(acpi, atk_ids);
148 #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
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];
166 unsigned long last_updated; /* in jiffies */
168 char const *acpi_name;
172 * Return buffer format:
173 * [0-3] "value" is valid flag
175 * [8- ] unknown stuff on newer mobos
177 struct atk_acpi_ret_buffer {
183 /* Input buffer used for GITM and SITM methods */
184 struct atk_acpi_input_buf {
190 static int atk_add(struct acpi_device *device);
191 static int atk_remove(struct acpi_device *device, int type);
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 static void atk_free_sensors(struct atk_data *data);
196 static struct acpi_driver atk_driver = {
202 .remove = atk_remove,
206 #define input_to_atk_sensor(attr) \
207 container_of(attr, struct atk_sensor_data, input_attr)
209 #define label_to_atk_sensor(attr) \
210 container_of(attr, struct atk_sensor_data, label_attr)
212 #define limit1_to_atk_sensor(attr) \
213 container_of(attr, struct atk_sensor_data, limit1_attr)
215 #define limit2_to_atk_sensor(attr) \
216 container_of(attr, struct atk_sensor_data, limit2_attr)
218 static ssize_t atk_input_show(struct device *dev,
219 struct device_attribute *attr, char *buf)
221 struct atk_sensor_data *s = input_to_atk_sensor(attr);
225 err = atk_read_value(s, &value);
229 if (s->type == HWMON_TYPE_TEMP)
230 /* ACPI returns decidegree */
233 return sprintf(buf, "%llu\n", value);
236 static ssize_t atk_label_show(struct device *dev,
237 struct device_attribute *attr, char *buf)
239 struct atk_sensor_data *s = label_to_atk_sensor(attr);
241 return sprintf(buf, "%s\n", s->acpi_name);
244 static ssize_t atk_limit1_show(struct device *dev,
245 struct device_attribute *attr, char *buf)
247 struct atk_sensor_data *s = limit1_to_atk_sensor(attr);
248 u64 value = s->limit1;
250 if (s->type == HWMON_TYPE_TEMP)
253 return sprintf(buf, "%lld\n", value);
256 static ssize_t atk_limit2_show(struct device *dev,
257 struct device_attribute *attr, char *buf)
259 struct atk_sensor_data *s = limit2_to_atk_sensor(attr);
260 u64 value = s->limit2;
262 if (s->type == HWMON_TYPE_TEMP)
265 return sprintf(buf, "%lld\n", value);
268 static ssize_t atk_name_show(struct device *dev,
269 struct device_attribute *attr, char *buf)
271 return sprintf(buf, "atk0110\n");
273 static struct device_attribute atk_name_attr =
274 __ATTR(name, 0444, atk_name_show, NULL);
276 static void atk_init_attribute(struct device_attribute *attr, char *name,
277 sysfs_show_func show)
279 sysfs_attr_init(&attr->attr);
280 attr->attr.name = name;
281 attr->attr.mode = 0444;
287 static union acpi_object *atk_get_pack_member(struct atk_data *data,
288 union acpi_object *pack,
289 enum atk_pack_member m)
291 bool old_if = data->old_interface;
295 case HWMON_PACK_FLAGS:
296 offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS;
298 case HWMON_PACK_NAME:
299 offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME;
301 case HWMON_PACK_LIMIT1:
302 offset = old_if ? _HWMON_OLD_PACK_LIMIT1 :
303 _HWMON_NEW_PACK_LIMIT1;
305 case HWMON_PACK_LIMIT2:
306 offset = old_if ? _HWMON_OLD_PACK_LIMIT2 :
307 _HWMON_NEW_PACK_LIMIT2;
309 case HWMON_PACK_ENABLE:
310 offset = old_if ? _HWMON_OLD_PACK_ENABLE :
311 _HWMON_NEW_PACK_ENABLE;
317 return &pack->package.elements[offset];
322 * New package format is:
324 * class - used for de-muxing the request to the correct GITn
325 * type (volt, temp, fan)
327 * sensor id - used for de-muxing the request _inside_ the GITn
335 * The old package has the same format but it's missing the two unknown fields.
337 static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj)
339 struct device *dev = &data->acpi_dev->dev;
340 union acpi_object *tmp;
341 bool old_if = data->old_interface;
342 int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE :
343 _HWMON_NEW_PACK_SIZE;
345 if (obj->type != ACPI_TYPE_PACKAGE) {
346 dev_warn(dev, "Invalid type: %d\n", obj->type);
350 if (obj->package.count != expected_size) {
351 dev_warn(dev, "Invalid package size: %d, expected: %d\n",
352 obj->package.count, expected_size);
356 tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
357 if (tmp->type != ACPI_TYPE_INTEGER) {
358 dev_warn(dev, "Invalid type (flag): %d\n", tmp->type);
362 tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
363 if (tmp->type != ACPI_TYPE_STRING) {
364 dev_warn(dev, "Invalid type (name): %d\n", tmp->type);
368 /* Don't check... we don't know what they're useful for anyway */
370 tmp = &obj->package.elements[HWMON_PACK_UNK1];
371 if (tmp->type != ACPI_TYPE_INTEGER) {
372 dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type);
376 tmp = &obj->package.elements[HWMON_PACK_UNK2];
377 if (tmp->type != ACPI_TYPE_INTEGER) {
378 dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type);
383 tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
384 if (tmp->type != ACPI_TYPE_INTEGER) {
385 dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type);
389 tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
390 if (tmp->type != ACPI_TYPE_INTEGER) {
391 dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type);
395 tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
396 if (tmp->type != ACPI_TYPE_INTEGER) {
397 dev_warn(dev, "Invalid type (enable): %d\n", tmp->type);
401 atk_print_sensor(data, obj);
407 static char const *atk_sensor_type(union acpi_object *flags)
409 u64 type = flags->integer.value & ATK_TYPE_MASK;
413 case HWMON_TYPE_VOLT:
416 case HWMON_TYPE_TEMP:
417 what = "temperature";
431 static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
434 struct device *dev = &data->acpi_dev->dev;
435 union acpi_object *flags;
436 union acpi_object *name;
437 union acpi_object *limit1;
438 union acpi_object *limit2;
439 union acpi_object *enable;
442 flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
443 name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
444 limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
445 limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
446 enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
448 what = atk_sensor_type(flags);
450 dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what,
451 flags->integer.value,
452 name->string.pointer,
453 limit1->integer.value, limit2->integer.value,
454 enable->integer.value ? "enabled" : "disabled");
458 static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
460 struct atk_data *data = sensor->data;
461 struct device *dev = &data->acpi_dev->dev;
462 struct acpi_object_list params;
463 union acpi_object id;
467 switch (sensor->type) {
468 case HWMON_TYPE_VOLT:
469 method = data->rvlt_handle;
471 case HWMON_TYPE_TEMP:
472 method = data->rtmp_handle;
475 method = data->rfan_handle;
481 id.type = ACPI_TYPE_INTEGER;
482 id.integer.value = sensor->id;
485 params.pointer = &id;
487 status = acpi_evaluate_integer(method, NULL, ¶ms, value);
488 if (status != AE_OK) {
489 dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
490 acpi_format_exception(status));
497 static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux)
499 struct device *dev = &data->acpi_dev->dev;
500 struct acpi_buffer buf;
502 struct acpi_object_list params;
503 union acpi_object id;
504 union acpi_object *pack;
506 id.type = ACPI_TYPE_INTEGER;
507 id.integer.value = mux;
509 params.pointer = &id;
511 buf.length = ACPI_ALLOCATE_BUFFER;
512 ret = acpi_evaluate_object(data->enumerate_handle, NULL, ¶ms, &buf);
514 dev_err(dev, "GGRP[%#x] ACPI exception: %s\n", mux,
515 acpi_format_exception(ret));
516 return ERR_PTR(-EIO);
519 if (pack->type != ACPI_TYPE_PACKAGE) {
520 /* Execution was successful, but the id was not found */
522 return ERR_PTR(-ENOENT);
525 if (pack->package.count < 1) {
526 dev_err(dev, "GGRP[%#x] package is too small\n", mux);
528 return ERR_PTR(-EIO);
533 static union acpi_object *atk_gitm(struct atk_data *data, u64 id)
535 struct device *dev = &data->acpi_dev->dev;
536 struct atk_acpi_input_buf buf;
537 union acpi_object tmp;
538 struct acpi_object_list params;
539 struct acpi_buffer ret;
540 union acpi_object *obj;
547 tmp.type = ACPI_TYPE_BUFFER;
548 tmp.buffer.pointer = (u8 *)&buf;
549 tmp.buffer.length = sizeof(buf);
552 params.pointer = (void *)&tmp;
554 ret.length = ACPI_ALLOCATE_BUFFER;
555 status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms,
556 &ret, ACPI_TYPE_BUFFER);
557 if (status != AE_OK) {
558 dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id,
559 acpi_format_exception(status));
560 return ERR_PTR(-EIO);
565 if (obj->buffer.length < 8) {
566 dev_warn(dev, "Unexpected ASBF length: %u\n",
569 return ERR_PTR(-EIO);
574 static union acpi_object *atk_sitm(struct atk_data *data,
575 struct atk_acpi_input_buf *buf)
577 struct device *dev = &data->acpi_dev->dev;
578 struct acpi_object_list params;
579 union acpi_object tmp;
580 struct acpi_buffer ret;
581 union acpi_object *obj;
584 tmp.type = ACPI_TYPE_BUFFER;
585 tmp.buffer.pointer = (u8 *)buf;
586 tmp.buffer.length = sizeof(*buf);
589 params.pointer = &tmp;
591 ret.length = ACPI_ALLOCATE_BUFFER;
592 status = acpi_evaluate_object_typed(data->write_handle, NULL, ¶ms,
593 &ret, ACPI_TYPE_BUFFER);
594 if (status != AE_OK) {
595 dev_warn(dev, "SITM[%#x] ACPI exception: %s\n", buf->id,
596 acpi_format_exception(status));
597 return ERR_PTR(-EIO);
602 if (obj->buffer.length < 8) {
603 dev_warn(dev, "Unexpected ASBF length: %u\n",
606 return ERR_PTR(-EIO);
611 static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
613 struct atk_data *data = sensor->data;
614 struct device *dev = &data->acpi_dev->dev;
615 union acpi_object *obj;
616 struct atk_acpi_ret_buffer *buf;
619 obj = atk_gitm(data, sensor->id);
623 buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
624 if (buf->flags == 0) {
626 * The reading is not valid, possible causes:
628 * - enumeration was FUBAR (and we didn't notice)
630 dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id);
641 static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
645 if (!sensor->is_valid ||
646 time_after(jiffies, sensor->last_updated + CACHE_TIME)) {
647 if (sensor->data->old_interface)
648 err = atk_read_value_old(sensor, value);
650 err = atk_read_value_new(sensor, value);
652 sensor->is_valid = true;
653 sensor->last_updated = jiffies;
654 sensor->cached_value = *value;
656 *value = sensor->cached_value;
663 #ifdef CONFIG_DEBUG_FS
664 static int atk_debugfs_gitm_get(void *p, u64 *val)
666 struct atk_data *data = p;
667 union acpi_object *ret;
668 struct atk_acpi_ret_buffer *buf;
671 if (!data->read_handle)
674 if (!data->debugfs.id)
677 ret = atk_gitm(data, data->debugfs.id);
681 buf = (struct atk_acpi_ret_buffer *)ret->buffer.pointer;
691 DEFINE_SIMPLE_ATTRIBUTE(atk_debugfs_gitm,
692 atk_debugfs_gitm_get,
696 static int atk_acpi_print(char *buf, size_t sz, union acpi_object *obj)
701 case ACPI_TYPE_INTEGER:
702 ret = snprintf(buf, sz, "0x%08llx\n", obj->integer.value);
704 case ACPI_TYPE_STRING:
705 ret = snprintf(buf, sz, "%s\n", obj->string.pointer);
712 static void atk_pack_print(char *buf, size_t sz, union acpi_object *pack)
717 for (i = 0; i < pack->package.count; i++) {
718 union acpi_object *obj = &pack->package.elements[i];
720 ret = atk_acpi_print(buf, sz, obj);
728 static int atk_debugfs_ggrp_open(struct inode *inode, struct file *file)
730 struct atk_data *data = inode->i_private;
732 union acpi_object *ret;
736 if (!data->enumerate_handle)
738 if (!data->debugfs.id)
741 cls = (data->debugfs.id & 0xff000000) >> 24;
742 ret = atk_ggrp(data, cls);
746 for (i = 0; i < ret->package.count; i++) {
747 union acpi_object *pack = &ret->package.elements[i];
748 union acpi_object *id;
750 if (pack->type != ACPI_TYPE_PACKAGE)
752 if (!pack->package.count)
754 id = &pack->package.elements[0];
755 if (id->integer.value == data->debugfs.id) {
756 /* Print the package */
757 buf = kzalloc(512, GFP_KERNEL);
762 atk_pack_print(buf, 512, pack);
771 file->private_data = buf;
773 return nonseekable_open(inode, file);
776 static ssize_t atk_debugfs_ggrp_read(struct file *file, char __user *buf,
777 size_t count, loff_t *pos)
779 char *str = file->private_data;
780 size_t len = strlen(str);
782 return simple_read_from_buffer(buf, count, pos, str, len);
785 static int atk_debugfs_ggrp_release(struct inode *inode, struct file *file)
787 kfree(file->private_data);
791 static const struct file_operations atk_debugfs_ggrp_fops = {
792 .read = atk_debugfs_ggrp_read,
793 .open = atk_debugfs_ggrp_open,
794 .release = atk_debugfs_ggrp_release,
798 static void atk_debugfs_init(struct atk_data *data)
803 data->debugfs.id = 0;
805 d = debugfs_create_dir("asus_atk0110", NULL);
809 f = debugfs_create_x32("id", S_IRUSR | S_IWUSR, d, &data->debugfs.id);
813 f = debugfs_create_file("gitm", S_IRUSR, d, data,
818 f = debugfs_create_file("ggrp", S_IRUSR, d, data,
819 &atk_debugfs_ggrp_fops);
823 data->debugfs.root = d;
827 debugfs_remove_recursive(d);
830 static void atk_debugfs_cleanup(struct atk_data *data)
832 debugfs_remove_recursive(data->debugfs.root);
835 #else /* CONFIG_DEBUG_FS */
837 static void atk_debugfs_init(struct atk_data *data)
841 static void atk_debugfs_cleanup(struct atk_data *data)
846 static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
848 struct device *dev = &data->acpi_dev->dev;
849 union acpi_object *flags;
850 union acpi_object *name;
851 union acpi_object *limit1;
852 union acpi_object *limit2;
853 union acpi_object *enable;
854 struct atk_sensor_data *sensor;
855 char const *base_name;
856 char const *limit1_name;
857 char const *limit2_name;
863 if (obj->type != ACPI_TYPE_PACKAGE) {
865 dev_warn(dev, "Unknown type for ACPI object: (%d)\n",
870 err = validate_hwmon_pack(data, obj);
874 /* Ok, we have a valid hwmon package */
875 type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value
879 case HWMON_TYPE_VOLT:
883 num = &data->voltage_count;
886 case HWMON_TYPE_TEMP:
889 limit2_name = "crit";
890 num = &data->temperature_count;
897 num = &data->fan_count;
901 dev_warn(dev, "Unknown sensor type: %#llx\n", type);
905 enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
906 if (!enable->integer.value)
907 /* sensor is disabled */
910 flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
911 name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
912 limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
913 limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
915 sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
919 sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL);
920 if (!sensor->acpi_name) {
925 INIT_LIST_HEAD(&sensor->list);
928 sensor->id = flags->integer.value;
929 sensor->limit1 = limit1->integer.value;
930 if (data->old_interface)
931 sensor->limit2 = limit2->integer.value;
933 /* The upper limit is expressed as delta from lower limit */
934 sensor->limit2 = sensor->limit1 + limit2->integer.value;
936 snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
937 "%s%d_input", base_name, start + *num);
938 atk_init_attribute(&sensor->input_attr,
939 sensor->input_attr_name,
942 snprintf(sensor->label_attr_name, ATTR_NAME_SIZE,
943 "%s%d_label", base_name, start + *num);
944 atk_init_attribute(&sensor->label_attr,
945 sensor->label_attr_name,
948 snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE,
949 "%s%d_%s", base_name, start + *num, limit1_name);
950 atk_init_attribute(&sensor->limit1_attr,
951 sensor->limit1_attr_name,
954 snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE,
955 "%s%d_%s", base_name, start + *num, limit2_name);
956 atk_init_attribute(&sensor->limit2_attr,
957 sensor->limit2_attr_name,
960 list_add(&sensor->list, &data->sensor_list);
969 static int atk_enumerate_old_hwmon(struct atk_data *data)
971 struct device *dev = &data->acpi_dev->dev;
972 struct acpi_buffer buf;
973 union acpi_object *pack;
979 buf.length = ACPI_ALLOCATE_BUFFER;
980 status = acpi_evaluate_object_typed(data->atk_handle,
981 METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE);
982 if (status != AE_OK) {
983 dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n",
984 acpi_format_exception(status));
990 for (i = 1; i < pack->package.count; i++) {
991 union acpi_object *obj = &pack->package.elements[i];
993 ret = atk_add_sensor(data, obj);
997 ACPI_FREE(buf.pointer);
1000 buf.length = ACPI_ALLOCATE_BUFFER;
1001 status = acpi_evaluate_object_typed(data->atk_handle,
1002 METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE);
1003 if (status != AE_OK) {
1004 dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n",
1005 acpi_format_exception(status));
1012 for (i = 1; i < pack->package.count; i++) {
1013 union acpi_object *obj = &pack->package.elements[i];
1015 ret = atk_add_sensor(data, obj);
1019 ACPI_FREE(buf.pointer);
1022 buf.length = ACPI_ALLOCATE_BUFFER;
1023 status = acpi_evaluate_object_typed(data->atk_handle,
1024 METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE);
1025 if (status != AE_OK) {
1026 dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n",
1027 acpi_format_exception(status));
1034 for (i = 1; i < pack->package.count; i++) {
1035 union acpi_object *obj = &pack->package.elements[i];
1037 ret = atk_add_sensor(data, obj);
1041 ACPI_FREE(buf.pointer);
1045 atk_free_sensors(data);
1049 static int atk_ec_present(struct atk_data *data)
1051 struct device *dev = &data->acpi_dev->dev;
1052 union acpi_object *pack;
1053 union acpi_object *ec;
1057 pack = atk_ggrp(data, ATK_MUX_MGMT);
1059 if (PTR_ERR(pack) == -ENOENT) {
1060 /* The MGMT class does not exists - that's ok */
1061 dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT);
1064 return PTR_ERR(pack);
1069 for (i = 0; i < pack->package.count; i++) {
1070 union acpi_object *obj = &pack->package.elements[i];
1071 union acpi_object *id;
1073 if (obj->type != ACPI_TYPE_PACKAGE)
1076 id = &obj->package.elements[0];
1077 if (id->type != ACPI_TYPE_INTEGER)
1080 if (id->integer.value == ATK_EC_ID) {
1088 /* The system has no EC */
1089 dev_dbg(dev, "EC not found\n");
1095 static int atk_ec_enabled(struct atk_data *data)
1097 struct device *dev = &data->acpi_dev->dev;
1098 union acpi_object *obj;
1099 struct atk_acpi_ret_buffer *buf;
1102 obj = atk_gitm(data, ATK_EC_ID);
1104 dev_err(dev, "Unable to query EC status\n");
1105 return PTR_ERR(obj);
1107 buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
1109 if (buf->flags == 0) {
1110 dev_err(dev, "Unable to query EC status\n");
1113 err = (buf->value != 0);
1114 dev_dbg(dev, "EC is %sabled\n",
1115 err ? "en" : "dis");
1122 static int atk_ec_ctl(struct atk_data *data, int enable)
1124 struct device *dev = &data->acpi_dev->dev;
1125 union acpi_object *obj;
1126 struct atk_acpi_input_buf sitm;
1127 struct atk_acpi_ret_buffer *ec_ret;
1130 sitm.id = ATK_EC_ID;
1131 sitm.param1 = enable;
1134 obj = atk_sitm(data, &sitm);
1136 dev_err(dev, "Failed to %sable the EC\n",
1137 enable ? "en" : "dis");
1138 return PTR_ERR(obj);
1140 ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
1141 if (ec_ret->flags == 0) {
1142 dev_err(dev, "Failed to %sable the EC\n",
1143 enable ? "en" : "dis");
1146 dev_info(dev, "EC %sabled\n",
1147 enable ? "en" : "dis");
1154 static int atk_enumerate_new_hwmon(struct atk_data *data)
1156 struct device *dev = &data->acpi_dev->dev;
1157 union acpi_object *pack;
1161 err = atk_ec_present(data);
1165 err = atk_ec_enabled(data);
1168 /* If the EC was disabled we will disable it again on unload */
1169 data->disable_ec = err;
1171 err = atk_ec_ctl(data, 1);
1173 data->disable_ec = false;
1178 dev_dbg(dev, "Enumerating hwmon sensors\n");
1180 pack = atk_ggrp(data, ATK_MUX_HWMON);
1182 return PTR_ERR(pack);
1184 for (i = 0; i < pack->package.count; i++) {
1185 union acpi_object *obj = &pack->package.elements[i];
1187 atk_add_sensor(data, obj);
1190 err = data->voltage_count + data->temperature_count + data->fan_count;
1196 static int atk_create_files(struct atk_data *data)
1198 struct atk_sensor_data *s;
1201 list_for_each_entry(s, &data->sensor_list, list) {
1202 err = device_create_file(data->hwmon_dev, &s->input_attr);
1205 err = device_create_file(data->hwmon_dev, &s->label_attr);
1208 err = device_create_file(data->hwmon_dev, &s->limit1_attr);
1211 err = device_create_file(data->hwmon_dev, &s->limit2_attr);
1216 err = device_create_file(data->hwmon_dev, &atk_name_attr);
1221 static void atk_remove_files(struct atk_data *data)
1223 struct atk_sensor_data *s;
1225 list_for_each_entry(s, &data->sensor_list, list) {
1226 device_remove_file(data->hwmon_dev, &s->input_attr);
1227 device_remove_file(data->hwmon_dev, &s->label_attr);
1228 device_remove_file(data->hwmon_dev, &s->limit1_attr);
1229 device_remove_file(data->hwmon_dev, &s->limit2_attr);
1231 device_remove_file(data->hwmon_dev, &atk_name_attr);
1234 static void atk_free_sensors(struct atk_data *data)
1236 struct list_head *head = &data->sensor_list;
1237 struct atk_sensor_data *s, *tmp;
1239 list_for_each_entry_safe(s, tmp, head, list) {
1240 kfree(s->acpi_name);
1245 static int atk_register_hwmon(struct atk_data *data)
1247 struct device *dev = &data->acpi_dev->dev;
1250 dev_dbg(dev, "registering hwmon device\n");
1251 data->hwmon_dev = hwmon_device_register(dev);
1252 if (IS_ERR(data->hwmon_dev))
1253 return PTR_ERR(data->hwmon_dev);
1255 dev_dbg(dev, "populating sysfs directory\n");
1256 err = atk_create_files(data);
1262 /* Cleanup the registered files */
1263 atk_remove_files(data);
1264 hwmon_device_unregister(data->hwmon_dev);
1268 static int atk_probe_if(struct atk_data *data)
1270 struct device *dev = &data->acpi_dev->dev;
1275 /* RTMP: read temperature */
1276 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret);
1277 if (ACPI_SUCCESS(status))
1278 data->rtmp_handle = ret;
1280 dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n",
1281 acpi_format_exception(status));
1283 /* RVLT: read voltage */
1284 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret);
1285 if (ACPI_SUCCESS(status))
1286 data->rvlt_handle = ret;
1288 dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n",
1289 acpi_format_exception(status));
1291 /* RFAN: read fan status */
1292 status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret);
1293 if (ACPI_SUCCESS(status))
1294 data->rfan_handle = ret;
1296 dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n",
1297 acpi_format_exception(status));
1300 status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret);
1301 if (ACPI_SUCCESS(status))
1302 data->enumerate_handle = ret;
1304 dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n",
1305 acpi_format_exception(status));
1307 /* De-multiplexer (read) */
1308 status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret);
1309 if (ACPI_SUCCESS(status))
1310 data->read_handle = ret;
1312 dev_dbg(dev, "method " METHOD_READ " not found: %s\n",
1313 acpi_format_exception(status));
1315 /* De-multiplexer (write) */
1316 status = acpi_get_handle(data->atk_handle, METHOD_WRITE, &ret);
1317 if (ACPI_SUCCESS(status))
1318 data->write_handle = ret;
1320 dev_dbg(dev, "method " METHOD_WRITE " not found: %s\n",
1321 acpi_format_exception(status));
1324 * Check for hwmon methods: first check "old" style methods; note that
1325 * both may be present: in this case we stick to the old interface;
1326 * analysis of multiple DSDTs indicates that when both interfaces
1327 * are present the new one (GGRP/GITM) is not functional.
1330 dev_info(dev, "Overriding interface detection\n");
1331 if (data->rtmp_handle &&
1332 data->rvlt_handle && data->rfan_handle && !new_if)
1333 data->old_interface = true;
1334 else if (data->enumerate_handle && data->read_handle &&
1336 data->old_interface = false;
1343 static int atk_add(struct acpi_device *device)
1347 struct acpi_buffer buf;
1348 union acpi_object *obj;
1349 struct atk_data *data;
1351 dev_dbg(&device->dev, "adding...\n");
1353 data = kzalloc(sizeof(*data), GFP_KERNEL);
1357 data->acpi_dev = device;
1358 data->atk_handle = device->handle;
1359 INIT_LIST_HEAD(&data->sensor_list);
1360 data->disable_ec = false;
1362 buf.length = ACPI_ALLOCATE_BUFFER;
1363 ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL,
1364 &buf, ACPI_TYPE_PACKAGE);
1366 dev_dbg(&device->dev, "atk: method MBIF not found\n");
1369 if (obj->package.count >= 2) {
1370 union acpi_object *id = &obj->package.elements[1];
1371 if (id->type == ACPI_TYPE_STRING)
1372 dev_dbg(&device->dev, "board ID = %s\n",
1373 id->string.pointer);
1375 ACPI_FREE(buf.pointer);
1378 err = atk_probe_if(data);
1380 dev_err(&device->dev, "No usable hwmon interface detected\n");
1384 if (data->old_interface) {
1385 dev_dbg(&device->dev, "Using old hwmon interface\n");
1386 err = atk_enumerate_old_hwmon(data);
1388 dev_dbg(&device->dev, "Using new hwmon interface\n");
1389 err = atk_enumerate_new_hwmon(data);
1394 dev_info(&device->dev,
1395 "No usable sensor detected, bailing out\n");
1400 err = atk_register_hwmon(data);
1404 atk_debugfs_init(data);
1406 device->driver_data = data;
1409 atk_free_sensors(data);
1411 if (data->disable_ec)
1412 atk_ec_ctl(data, 0);
1417 static int atk_remove(struct acpi_device *device, int type)
1419 struct atk_data *data = device->driver_data;
1420 dev_dbg(&device->dev, "removing...\n");
1422 device->driver_data = NULL;
1424 atk_debugfs_cleanup(data);
1426 atk_remove_files(data);
1427 atk_free_sensors(data);
1428 hwmon_device_unregister(data->hwmon_dev);
1430 if (data->disable_ec) {
1431 if (atk_ec_ctl(data, 0))
1432 dev_err(&device->dev, "Failed to disable EC\n");
1440 static int __init atk0110_init(void)
1444 /* Make sure it's safe to access the device through ACPI */
1445 if (!acpi_resources_are_enforced()) {
1446 pr_err("Resources not safely usable due to acpi_enforce_resources kernel parameter\n");
1450 if (dmi_check_system(atk_force_new_if))
1453 ret = acpi_bus_register_driver(&atk_driver);
1455 pr_info("acpi_bus_register_driver failed: %d\n", ret);
1460 static void __exit atk0110_exit(void)
1462 acpi_bus_unregister_driver(&atk_driver);
1465 module_init(atk0110_init);
1466 module_exit(atk0110_exit);
1468 MODULE_LICENSE("GPL");