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/kernel.h>
9 #include <linux/hwmon.h>
10 #include <linux/list.h>
11 #include <linux/module.h>
13 #include <acpi/acpi.h>
14 #include <acpi/acpixf.h>
15 #include <acpi/acpi_drivers.h>
16 #include <acpi/acpi_bus.h>
19 #define ATK_HID "ATK0110"
21 /* Minimum time between readings, enforced in order to avoid
26 #define BOARD_ID "MBIF"
27 #define METHOD_ENUMERATE "GGRP"
28 #define METHOD_READ "GITM"
29 #define METHOD_WRITE "SITM"
30 #define METHOD_OLD_READ_TMP "RTMP"
31 #define METHOD_OLD_READ_VLT "RVLT"
32 #define METHOD_OLD_READ_FAN "RFAN"
33 #define METHOD_OLD_ENUM_TMP "TSIF"
34 #define METHOD_OLD_ENUM_VLT "VSIF"
35 #define METHOD_OLD_ENUM_FAN "FSIF"
37 #define ATK_MUX_HWMON 0x00000006ULL
39 #define ATK_CLASS_MASK 0xff000000ULL
40 #define ATK_CLASS_FREQ_CTL 0x03000000ULL
41 #define ATK_CLASS_FAN_CTL 0x04000000ULL
42 #define ATK_CLASS_HWMON 0x06000000ULL
44 #define ATK_TYPE_MASK 0x00ff0000ULL
45 #define HWMON_TYPE_VOLT 0x00020000ULL
46 #define HWMON_TYPE_TEMP 0x00030000ULL
47 #define HWMON_TYPE_FAN 0x00040000ULL
49 #define HWMON_SENSOR_ID_MASK 0x0000ffffULL
51 enum atk_pack_member
{
59 /* New package format */
60 #define _HWMON_NEW_PACK_SIZE 7
61 #define _HWMON_NEW_PACK_FLAGS 0
62 #define _HWMON_NEW_PACK_NAME 1
63 #define _HWMON_NEW_PACK_UNK1 2
64 #define _HWMON_NEW_PACK_UNK2 3
65 #define _HWMON_NEW_PACK_LIMIT1 4
66 #define _HWMON_NEW_PACK_LIMIT2 5
67 #define _HWMON_NEW_PACK_ENABLE 6
69 /* Old package format */
70 #define _HWMON_OLD_PACK_SIZE 5
71 #define _HWMON_OLD_PACK_FLAGS 0
72 #define _HWMON_OLD_PACK_NAME 1
73 #define _HWMON_OLD_PACK_LIMIT1 2
74 #define _HWMON_OLD_PACK_LIMIT2 3
75 #define _HWMON_OLD_PACK_ENABLE 4
79 struct device
*hwmon_dev
;
80 acpi_handle atk_handle
;
81 struct acpi_device
*acpi_dev
;
86 acpi_handle rtmp_handle
;
87 acpi_handle rvlt_handle
;
88 acpi_handle rfan_handle
;
90 acpi_handle enumerate_handle
;
91 acpi_handle read_handle
;
94 int temperature_count
;
96 struct list_head sensor_list
;
100 typedef ssize_t (*sysfs_show_func
)(struct device
*dev
,
101 struct device_attribute
*attr
, char *buf
);
103 static const struct acpi_device_id atk_ids
[] = {
107 MODULE_DEVICE_TABLE(acpi
, atk_ids
);
109 #define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
111 struct atk_sensor_data
{
112 struct list_head list
;
113 struct atk_data
*data
;
114 struct device_attribute label_attr
;
115 struct device_attribute input_attr
;
116 struct device_attribute limit1_attr
;
117 struct device_attribute limit2_attr
;
118 char label_attr_name
[ATTR_NAME_SIZE
];
119 char input_attr_name
[ATTR_NAME_SIZE
];
120 char limit1_attr_name
[ATTR_NAME_SIZE
];
121 char limit2_attr_name
[ATTR_NAME_SIZE
];
127 unsigned long last_updated
; /* in jiffies */
129 char const *acpi_name
;
132 struct atk_acpi_buffer_u64
{
133 union acpi_object buf
;
137 static int atk_add(struct acpi_device
*device
);
138 static int atk_remove(struct acpi_device
*device
, int type
);
139 static void atk_print_sensor(struct atk_data
*data
, union acpi_object
*obj
);
140 static int atk_read_value(struct atk_sensor_data
*sensor
, u64
*value
);
141 static void atk_free_sensors(struct atk_data
*data
);
143 static struct acpi_driver atk_driver
= {
149 .remove
= atk_remove
,
153 #define input_to_atk_sensor(attr) \
154 container_of(attr, struct atk_sensor_data, input_attr)
156 #define label_to_atk_sensor(attr) \
157 container_of(attr, struct atk_sensor_data, label_attr)
159 #define limit1_to_atk_sensor(attr) \
160 container_of(attr, struct atk_sensor_data, limit1_attr)
162 #define limit2_to_atk_sensor(attr) \
163 container_of(attr, struct atk_sensor_data, limit2_attr)
165 static ssize_t
atk_input_show(struct device
*dev
,
166 struct device_attribute
*attr
, char *buf
)
168 struct atk_sensor_data
*s
= input_to_atk_sensor(attr
);
172 err
= atk_read_value(s
, &value
);
176 if (s
->type
== HWMON_TYPE_TEMP
)
177 /* ACPI returns decidegree */
180 return sprintf(buf
, "%llu\n", value
);
183 static ssize_t
atk_label_show(struct device
*dev
,
184 struct device_attribute
*attr
, char *buf
)
186 struct atk_sensor_data
*s
= label_to_atk_sensor(attr
);
188 return sprintf(buf
, "%s\n", s
->acpi_name
);
191 static ssize_t
atk_limit1_show(struct device
*dev
,
192 struct device_attribute
*attr
, char *buf
)
194 struct atk_sensor_data
*s
= limit1_to_atk_sensor(attr
);
195 u64 value
= s
->limit1
;
197 if (s
->type
== HWMON_TYPE_TEMP
)
200 return sprintf(buf
, "%lld\n", value
);
203 static ssize_t
atk_limit2_show(struct device
*dev
,
204 struct device_attribute
*attr
, char *buf
)
206 struct atk_sensor_data
*s
= limit2_to_atk_sensor(attr
);
207 u64 value
= s
->limit2
;
209 if (s
->type
== HWMON_TYPE_TEMP
)
212 return sprintf(buf
, "%lld\n", value
);
215 static ssize_t
atk_name_show(struct device
*dev
,
216 struct device_attribute
*attr
, char *buf
)
218 return sprintf(buf
, "atk0110\n");
220 static struct device_attribute atk_name_attr
=
221 __ATTR(name
, 0444, atk_name_show
, NULL
);
223 static void atk_init_attribute(struct device_attribute
*attr
, char *name
,
224 sysfs_show_func show
)
226 attr
->attr
.name
= name
;
227 attr
->attr
.mode
= 0444;
233 static union acpi_object
*atk_get_pack_member(struct atk_data
*data
,
234 union acpi_object
*pack
,
235 enum atk_pack_member m
)
237 bool old_if
= data
->old_interface
;
241 case HWMON_PACK_FLAGS
:
242 offset
= old_if
? _HWMON_OLD_PACK_FLAGS
: _HWMON_NEW_PACK_FLAGS
;
244 case HWMON_PACK_NAME
:
245 offset
= old_if
? _HWMON_OLD_PACK_NAME
: _HWMON_NEW_PACK_NAME
;
247 case HWMON_PACK_LIMIT1
:
248 offset
= old_if
? _HWMON_OLD_PACK_LIMIT1
:
249 _HWMON_NEW_PACK_LIMIT1
;
251 case HWMON_PACK_LIMIT2
:
252 offset
= old_if
? _HWMON_OLD_PACK_LIMIT2
:
253 _HWMON_NEW_PACK_LIMIT2
;
255 case HWMON_PACK_ENABLE
:
256 offset
= old_if
? _HWMON_OLD_PACK_ENABLE
:
257 _HWMON_NEW_PACK_ENABLE
;
263 return &pack
->package
.elements
[offset
];
267 /* New package format is:
269 * class - used for de-muxing the request to the correct GITn
270 * type (volt, temp, fan)
272 * sensor id - used for de-muxing the request _inside_ the GITn
280 * The old package has the same format but it's missing the two unknown fields.
282 static int validate_hwmon_pack(struct atk_data
*data
, union acpi_object
*obj
)
284 struct device
*dev
= &data
->acpi_dev
->dev
;
285 union acpi_object
*tmp
;
286 bool old_if
= data
->old_interface
;
287 int const expected_size
= old_if
? _HWMON_OLD_PACK_SIZE
:
288 _HWMON_NEW_PACK_SIZE
;
290 if (obj
->type
!= ACPI_TYPE_PACKAGE
) {
291 dev_warn(dev
, "Invalid type: %d\n", obj
->type
);
295 if (obj
->package
.count
!= expected_size
) {
296 dev_warn(dev
, "Invalid package size: %d, expected: %d\n",
297 obj
->package
.count
, expected_size
);
301 tmp
= atk_get_pack_member(data
, obj
, HWMON_PACK_FLAGS
);
302 if (tmp
->type
!= ACPI_TYPE_INTEGER
) {
303 dev_warn(dev
, "Invalid type (flag): %d\n", tmp
->type
);
307 tmp
= atk_get_pack_member(data
, obj
, HWMON_PACK_NAME
);
308 if (tmp
->type
!= ACPI_TYPE_STRING
) {
309 dev_warn(dev
, "Invalid type (name): %d\n", tmp
->type
);
313 /* Don't check... we don't know what they're useful for anyway */
315 tmp
= &obj
->package
.elements
[HWMON_PACK_UNK1
];
316 if (tmp
->type
!= ACPI_TYPE_INTEGER
) {
317 dev_warn(dev
, "Invalid type (unk1): %d\n", tmp
->type
);
321 tmp
= &obj
->package
.elements
[HWMON_PACK_UNK2
];
322 if (tmp
->type
!= ACPI_TYPE_INTEGER
) {
323 dev_warn(dev
, "Invalid type (unk2): %d\n", tmp
->type
);
328 tmp
= atk_get_pack_member(data
, obj
, HWMON_PACK_LIMIT1
);
329 if (tmp
->type
!= ACPI_TYPE_INTEGER
) {
330 dev_warn(dev
, "Invalid type (limit1): %d\n", tmp
->type
);
334 tmp
= atk_get_pack_member(data
, obj
, HWMON_PACK_LIMIT2
);
335 if (tmp
->type
!= ACPI_TYPE_INTEGER
) {
336 dev_warn(dev
, "Invalid type (limit2): %d\n", tmp
->type
);
340 tmp
= atk_get_pack_member(data
, obj
, HWMON_PACK_ENABLE
);
341 if (tmp
->type
!= ACPI_TYPE_INTEGER
) {
342 dev_warn(dev
, "Invalid type (enable): %d\n", tmp
->type
);
346 atk_print_sensor(data
, obj
);
351 static char const *atk_sensor_type(union acpi_object
*flags
)
353 u64 type
= flags
->integer
.value
& ATK_TYPE_MASK
;
357 case HWMON_TYPE_VOLT
:
360 case HWMON_TYPE_TEMP
:
361 what
= "temperature";
374 static void atk_print_sensor(struct atk_data
*data
, union acpi_object
*obj
)
377 struct device
*dev
= &data
->acpi_dev
->dev
;
378 union acpi_object
*flags
;
379 union acpi_object
*name
;
380 union acpi_object
*limit1
;
381 union acpi_object
*limit2
;
382 union acpi_object
*enable
;
385 flags
= atk_get_pack_member(data
, obj
, HWMON_PACK_FLAGS
);
386 name
= atk_get_pack_member(data
, obj
, HWMON_PACK_NAME
);
387 limit1
= atk_get_pack_member(data
, obj
, HWMON_PACK_LIMIT1
);
388 limit2
= atk_get_pack_member(data
, obj
, HWMON_PACK_LIMIT2
);
389 enable
= atk_get_pack_member(data
, obj
, HWMON_PACK_ENABLE
);
391 what
= atk_sensor_type(flags
);
393 dev_dbg(dev
, "%s: %#llx %s [%llu-%llu] %s\n", what
,
394 flags
->integer
.value
,
395 name
->string
.pointer
,
396 limit1
->integer
.value
, limit2
->integer
.value
,
397 enable
->integer
.value
? "enabled" : "disabled");
401 static int atk_read_value_old(struct atk_sensor_data
*sensor
, u64
*value
)
403 struct atk_data
*data
= sensor
->data
;
404 struct device
*dev
= &data
->acpi_dev
->dev
;
405 struct acpi_object_list params
;
406 union acpi_object id
;
410 switch (sensor
->type
) {
411 case HWMON_TYPE_VOLT
:
412 method
= data
->rvlt_handle
;
414 case HWMON_TYPE_TEMP
:
415 method
= data
->rtmp_handle
;
418 method
= data
->rfan_handle
;
424 id
.type
= ACPI_TYPE_INTEGER
;
425 id
.integer
.value
= sensor
->id
;
428 params
.pointer
= &id
;
430 status
= acpi_evaluate_integer(method
, NULL
, ¶ms
, value
);
431 if (status
!= AE_OK
) {
432 dev_warn(dev
, "%s: ACPI exception: %s\n", __func__
,
433 acpi_format_exception(status
));
440 static int atk_read_value_new(struct atk_sensor_data
*sensor
, u64
*value
)
442 struct atk_data
*data
= sensor
->data
;
443 struct device
*dev
= &data
->acpi_dev
->dev
;
444 struct acpi_object_list params
;
445 struct acpi_buffer ret
;
446 union acpi_object id
;
447 struct atk_acpi_buffer_u64 tmp
;
450 id
.type
= ACPI_TYPE_INTEGER
;
451 id
.integer
.value
= sensor
->id
;
454 params
.pointer
= &id
;
456 tmp
.buf
.type
= ACPI_TYPE_BUFFER
;
457 tmp
.buf
.buffer
.pointer
= (u8
*)&tmp
.value
;
458 tmp
.buf
.buffer
.length
= sizeof(u64
);
459 ret
.length
= sizeof(tmp
);
462 status
= acpi_evaluate_object_typed(data
->read_handle
, NULL
, ¶ms
,
463 &ret
, ACPI_TYPE_BUFFER
);
464 if (status
!= AE_OK
) {
465 dev_warn(dev
, "%s: ACPI exception: %s\n", __func__
,
466 acpi_format_exception(status
));
470 /* Return buffer format:
471 * [0-3] "value" is valid flag
474 if (!(tmp
.value
& 0xffffffff)) {
475 /* The reading is not valid, possible causes:
477 * - enumeration was FUBAR (and we didn't notice)
479 dev_info(dev
, "Failure: %#llx\n", tmp
.value
);
483 *value
= (tmp
.value
& 0xffffffff00000000ULL
) >> 32;
488 static int atk_read_value(struct atk_sensor_data
*sensor
, u64
*value
)
492 if (!sensor
->is_valid
||
493 time_after(jiffies
, sensor
->last_updated
+ CACHE_TIME
)) {
494 if (sensor
->data
->old_interface
)
495 err
= atk_read_value_old(sensor
, value
);
497 err
= atk_read_value_new(sensor
, value
);
499 sensor
->is_valid
= true;
500 sensor
->last_updated
= jiffies
;
501 sensor
->cached_value
= *value
;
503 *value
= sensor
->cached_value
;
510 static int atk_add_sensor(struct atk_data
*data
, union acpi_object
*obj
)
512 struct device
*dev
= &data
->acpi_dev
->dev
;
513 union acpi_object
*flags
;
514 union acpi_object
*name
;
515 union acpi_object
*limit1
;
516 union acpi_object
*limit2
;
517 union acpi_object
*enable
;
518 struct atk_sensor_data
*sensor
;
519 char const *base_name
;
520 char const *limit1_name
;
521 char const *limit2_name
;
527 if (obj
->type
!= ACPI_TYPE_PACKAGE
) {
529 dev_warn(dev
, "Unknown type for ACPI object: (%d)\n",
534 err
= validate_hwmon_pack(data
, obj
);
538 /* Ok, we have a valid hwmon package */
539 type
= atk_get_pack_member(data
, obj
, HWMON_PACK_FLAGS
)->integer
.value
543 case HWMON_TYPE_VOLT
:
547 num
= &data
->voltage_count
;
550 case HWMON_TYPE_TEMP
:
553 limit2_name
= "crit";
554 num
= &data
->temperature_count
;
561 num
= &data
->fan_count
;
565 dev_warn(dev
, "Unknown sensor type: %#llx\n", type
);
569 enable
= atk_get_pack_member(data
, obj
, HWMON_PACK_ENABLE
);
570 if (!enable
->integer
.value
)
571 /* sensor is disabled */
574 flags
= atk_get_pack_member(data
, obj
, HWMON_PACK_FLAGS
);
575 name
= atk_get_pack_member(data
, obj
, HWMON_PACK_NAME
);
576 limit1
= atk_get_pack_member(data
, obj
, HWMON_PACK_LIMIT1
);
577 limit2
= atk_get_pack_member(data
, obj
, HWMON_PACK_LIMIT2
);
579 sensor
= kzalloc(sizeof(*sensor
), GFP_KERNEL
);
583 sensor
->acpi_name
= kstrdup(name
->string
.pointer
, GFP_KERNEL
);
584 if (!sensor
->acpi_name
) {
589 INIT_LIST_HEAD(&sensor
->list
);
592 sensor
->id
= flags
->integer
.value
;
593 sensor
->limit1
= limit1
->integer
.value
;
594 sensor
->limit2
= limit2
->integer
.value
;
596 snprintf(sensor
->input_attr_name
, ATTR_NAME_SIZE
,
597 "%s%d_input", base_name
, start
+ *num
);
598 atk_init_attribute(&sensor
->input_attr
,
599 sensor
->input_attr_name
,
602 snprintf(sensor
->label_attr_name
, ATTR_NAME_SIZE
,
603 "%s%d_label", base_name
, start
+ *num
);
604 atk_init_attribute(&sensor
->label_attr
,
605 sensor
->label_attr_name
,
608 snprintf(sensor
->limit1_attr_name
, ATTR_NAME_SIZE
,
609 "%s%d_%s", base_name
, start
+ *num
, limit1_name
);
610 atk_init_attribute(&sensor
->limit1_attr
,
611 sensor
->limit1_attr_name
,
614 snprintf(sensor
->limit2_attr_name
, ATTR_NAME_SIZE
,
615 "%s%d_%s", base_name
, start
+ *num
, limit2_name
);
616 atk_init_attribute(&sensor
->limit2_attr
,
617 sensor
->limit2_attr_name
,
620 list_add(&sensor
->list
, &data
->sensor_list
);
625 kfree(sensor
->acpi_name
);
630 static int atk_enumerate_old_hwmon(struct atk_data
*data
)
632 struct device
*dev
= &data
->acpi_dev
->dev
;
633 struct acpi_buffer buf
;
634 union acpi_object
*pack
;
640 buf
.length
= ACPI_ALLOCATE_BUFFER
;
641 status
= acpi_evaluate_object_typed(data
->atk_handle
,
642 METHOD_OLD_ENUM_VLT
, NULL
, &buf
, ACPI_TYPE_PACKAGE
);
643 if (status
!= AE_OK
) {
644 dev_warn(dev
, METHOD_OLD_ENUM_VLT
": ACPI exception: %s\n",
645 acpi_format_exception(status
));
651 for (i
= 1; i
< pack
->package
.count
; i
++) {
652 union acpi_object
*obj
= &pack
->package
.elements
[i
];
654 ret
= atk_add_sensor(data
, obj
);
658 ACPI_FREE(buf
.pointer
);
661 buf
.length
= ACPI_ALLOCATE_BUFFER
;
662 status
= acpi_evaluate_object_typed(data
->atk_handle
,
663 METHOD_OLD_ENUM_TMP
, NULL
, &buf
, ACPI_TYPE_PACKAGE
);
664 if (status
!= AE_OK
) {
665 dev_warn(dev
, METHOD_OLD_ENUM_TMP
": ACPI exception: %s\n",
666 acpi_format_exception(status
));
673 for (i
= 1; i
< pack
->package
.count
; i
++) {
674 union acpi_object
*obj
= &pack
->package
.elements
[i
];
676 ret
= atk_add_sensor(data
, obj
);
680 ACPI_FREE(buf
.pointer
);
683 buf
.length
= ACPI_ALLOCATE_BUFFER
;
684 status
= acpi_evaluate_object_typed(data
->atk_handle
,
685 METHOD_OLD_ENUM_FAN
, NULL
, &buf
, ACPI_TYPE_PACKAGE
);
686 if (status
!= AE_OK
) {
687 dev_warn(dev
, METHOD_OLD_ENUM_FAN
": ACPI exception: %s\n",
688 acpi_format_exception(status
));
695 for (i
= 1; i
< pack
->package
.count
; i
++) {
696 union acpi_object
*obj
= &pack
->package
.elements
[i
];
698 ret
= atk_add_sensor(data
, obj
);
702 ACPI_FREE(buf
.pointer
);
706 atk_free_sensors(data
);
710 static int atk_enumerate_new_hwmon(struct atk_data
*data
)
712 struct device
*dev
= &data
->acpi_dev
->dev
;
713 struct acpi_buffer buf
;
715 struct acpi_object_list params
;
716 union acpi_object id
;
717 union acpi_object
*pack
;
721 dev_dbg(dev
, "Enumerating hwmon sensors\n");
723 id
.type
= ACPI_TYPE_INTEGER
;
724 id
.integer
.value
= ATK_MUX_HWMON
;
726 params
.pointer
= &id
;
728 buf
.length
= ACPI_ALLOCATE_BUFFER
;
729 ret
= acpi_evaluate_object_typed(data
->enumerate_handle
, NULL
, ¶ms
,
730 &buf
, ACPI_TYPE_PACKAGE
);
732 dev_warn(dev
, METHOD_ENUMERATE
": ACPI exception: %s\n",
733 acpi_format_exception(ret
));
737 /* Result must be a package */
740 if (pack
->package
.count
< 1) {
741 dev_dbg(dev
, "%s: hwmon package is too small: %d\n", __func__
,
742 pack
->package
.count
);
747 for (i
= 0; i
< pack
->package
.count
; i
++) {
748 union acpi_object
*obj
= &pack
->package
.elements
[i
];
750 atk_add_sensor(data
, obj
);
753 err
= data
->voltage_count
+ data
->temperature_count
+ data
->fan_count
;
756 ACPI_FREE(buf
.pointer
);
760 static int atk_create_files(struct atk_data
*data
)
762 struct atk_sensor_data
*s
;
765 list_for_each_entry(s
, &data
->sensor_list
, list
) {
766 err
= device_create_file(data
->hwmon_dev
, &s
->input_attr
);
769 err
= device_create_file(data
->hwmon_dev
, &s
->label_attr
);
772 err
= device_create_file(data
->hwmon_dev
, &s
->limit1_attr
);
775 err
= device_create_file(data
->hwmon_dev
, &s
->limit2_attr
);
780 err
= device_create_file(data
->hwmon_dev
, &atk_name_attr
);
785 static void atk_remove_files(struct atk_data
*data
)
787 struct atk_sensor_data
*s
;
789 list_for_each_entry(s
, &data
->sensor_list
, list
) {
790 device_remove_file(data
->hwmon_dev
, &s
->input_attr
);
791 device_remove_file(data
->hwmon_dev
, &s
->label_attr
);
792 device_remove_file(data
->hwmon_dev
, &s
->limit1_attr
);
793 device_remove_file(data
->hwmon_dev
, &s
->limit2_attr
);
795 device_remove_file(data
->hwmon_dev
, &atk_name_attr
);
798 static void atk_free_sensors(struct atk_data
*data
)
800 struct list_head
*head
= &data
->sensor_list
;
801 struct atk_sensor_data
*s
, *tmp
;
803 list_for_each_entry_safe(s
, tmp
, head
, list
) {
809 static int atk_register_hwmon(struct atk_data
*data
)
811 struct device
*dev
= &data
->acpi_dev
->dev
;
814 dev_dbg(dev
, "registering hwmon device\n");
815 data
->hwmon_dev
= hwmon_device_register(dev
);
816 if (IS_ERR(data
->hwmon_dev
))
817 return PTR_ERR(data
->hwmon_dev
);
819 dev_dbg(dev
, "populating sysfs directory\n");
820 err
= atk_create_files(data
);
826 /* Cleanup the registered files */
827 atk_remove_files(data
);
828 hwmon_device_unregister(data
->hwmon_dev
);
832 static int atk_check_old_if(struct atk_data
*data
)
834 struct device
*dev
= &data
->acpi_dev
->dev
;
838 /* RTMP: read temperature */
839 status
= acpi_get_handle(data
->atk_handle
, METHOD_OLD_READ_TMP
, &ret
);
840 if (status
!= AE_OK
) {
841 dev_dbg(dev
, "method " METHOD_OLD_READ_TMP
" not found: %s\n",
842 acpi_format_exception(status
));
845 data
->rtmp_handle
= ret
;
847 /* RVLT: read voltage */
848 status
= acpi_get_handle(data
->atk_handle
, METHOD_OLD_READ_VLT
, &ret
);
849 if (status
!= AE_OK
) {
850 dev_dbg(dev
, "method " METHOD_OLD_READ_VLT
" not found: %s\n",
851 acpi_format_exception(status
));
854 data
->rvlt_handle
= ret
;
856 /* RFAN: read fan status */
857 status
= acpi_get_handle(data
->atk_handle
, METHOD_OLD_READ_FAN
, &ret
);
858 if (status
!= AE_OK
) {
859 dev_dbg(dev
, "method " METHOD_OLD_READ_FAN
" not found: %s\n",
860 acpi_format_exception(status
));
863 data
->rfan_handle
= ret
;
868 static int atk_check_new_if(struct atk_data
*data
)
870 struct device
*dev
= &data
->acpi_dev
->dev
;
875 status
= acpi_get_handle(data
->atk_handle
, METHOD_ENUMERATE
, &ret
);
876 if (status
!= AE_OK
) {
877 dev_dbg(dev
, "method " METHOD_ENUMERATE
" not found: %s\n",
878 acpi_format_exception(status
));
881 data
->enumerate_handle
= ret
;
883 /* De-multiplexer (read) */
884 status
= acpi_get_handle(data
->atk_handle
, METHOD_READ
, &ret
);
885 if (status
!= AE_OK
) {
886 dev_dbg(dev
, "method " METHOD_READ
" not found: %s\n",
887 acpi_format_exception(status
));
890 data
->read_handle
= ret
;
895 static int atk_add(struct acpi_device
*device
)
899 struct acpi_buffer buf
;
900 union acpi_object
*obj
;
901 struct atk_data
*data
;
903 dev_dbg(&device
->dev
, "adding...\n");
905 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
909 data
->acpi_dev
= device
;
910 data
->atk_handle
= device
->handle
;
911 INIT_LIST_HEAD(&data
->sensor_list
);
913 buf
.length
= ACPI_ALLOCATE_BUFFER
;
914 ret
= acpi_evaluate_object_typed(data
->atk_handle
, BOARD_ID
, NULL
,
915 &buf
, ACPI_TYPE_PACKAGE
);
917 dev_dbg(&device
->dev
, "atk: method MBIF not found\n");
923 if (obj
->package
.count
>= 2 &&
924 obj
->package
.elements
[1].type
== ACPI_TYPE_STRING
) {
925 dev_dbg(&device
->dev
, "board ID = %s\n",
926 obj
->package
.elements
[1].string
.pointer
);
928 ACPI_FREE(buf
.pointer
);
930 /* Check for hwmon methods: first check "old" style methods; note that
931 * both may be present: in this case we stick to the old interface;
932 * analysis of multiple DSDTs indicates that when both interfaces
933 * are present the new one (GGRP/GITM) is not functional.
935 err
= atk_check_old_if(data
);
937 dev_dbg(&device
->dev
, "Using old hwmon interface\n");
938 data
->old_interface
= true;
940 err
= atk_check_new_if(data
);
944 dev_dbg(&device
->dev
, "Using new hwmon interface\n");
945 data
->old_interface
= false;
948 if (data
->old_interface
)
949 err
= atk_enumerate_old_hwmon(data
);
951 err
= atk_enumerate_new_hwmon(data
);
955 dev_info(&device
->dev
,
956 "No usable sensor detected, bailing out\n");
961 err
= atk_register_hwmon(data
);
965 device
->driver_data
= data
;
968 atk_free_sensors(data
);
974 static int atk_remove(struct acpi_device
*device
, int type
)
976 struct atk_data
*data
= device
->driver_data
;
977 dev_dbg(&device
->dev
, "removing...\n");
979 device
->driver_data
= NULL
;
981 atk_remove_files(data
);
982 atk_free_sensors(data
);
983 hwmon_device_unregister(data
->hwmon_dev
);
990 static int __init
atk0110_init(void)
994 ret
= acpi_bus_register_driver(&atk_driver
);
996 pr_info("atk: acpi_bus_register_driver failed: %d\n", ret
);
1001 static void __exit
atk0110_exit(void)
1003 acpi_bus_unregister_driver(&atk_driver
);
1006 module_init(atk0110_init
);
1007 module_exit(atk0110_exit
);
1009 MODULE_LICENSE("GPL");