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asus_atk0110.c
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/*
* Copyright (C) 2007-2009 Luca Tettamanti <kronos.it@gmail.com>
*
* This file is released under the GPLv2
* See COPYING in the top level directory of the kernel tree.
*/
#include <linux/kernel.h>
#include <linux/hwmon.h>
#include <linux/list.h>
#include <linux/module.h>
#include <acpi/acpi.h>
#include <acpi/acpixf.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#define ATK_HID "ATK0110"
/* Minimum time between readings, enforced in order to avoid
* hogging the CPU.
*/
#define CACHE_TIME HZ
#define BOARD_ID "MBIF"
#define METHOD_ENUMERATE "GGRP"
#define METHOD_READ "GITM"
#define METHOD_WRITE "SITM"
#define METHOD_OLD_READ_TMP "RTMP"
#define METHOD_OLD_READ_VLT "RVLT"
#define METHOD_OLD_READ_FAN "RFAN"
#define METHOD_OLD_ENUM_TMP "TSIF"
#define METHOD_OLD_ENUM_VLT "VSIF"
#define METHOD_OLD_ENUM_FAN "FSIF"
#define ATK_MUX_HWMON 0x00000006ULL
#define ATK_MUX_MGMT 0x00000011ULL
#define ATK_CLASS_MASK 0xff000000ULL
#define ATK_CLASS_FREQ_CTL 0x03000000ULL
#define ATK_CLASS_FAN_CTL 0x04000000ULL
#define ATK_CLASS_HWMON 0x06000000ULL
#define ATK_CLASS_MGMT 0x11000000ULL
#define ATK_TYPE_MASK 0x00ff0000ULL
#define HWMON_TYPE_VOLT 0x00020000ULL
#define HWMON_TYPE_TEMP 0x00030000ULL
#define HWMON_TYPE_FAN 0x00040000ULL
#define ATK_ELEMENT_ID_MASK 0x0000ffffULL
#define ATK_EC_ID 0x11060004ULL
enum atk_pack_member {
HWMON_PACK_FLAGS,
HWMON_PACK_NAME,
HWMON_PACK_LIMIT1,
HWMON_PACK_LIMIT2,
HWMON_PACK_ENABLE
};
/* New package format */
#define _HWMON_NEW_PACK_SIZE 7
#define _HWMON_NEW_PACK_FLAGS 0
#define _HWMON_NEW_PACK_NAME 1
#define _HWMON_NEW_PACK_UNK1 2
#define _HWMON_NEW_PACK_UNK2 3
#define _HWMON_NEW_PACK_LIMIT1 4
#define _HWMON_NEW_PACK_LIMIT2 5
#define _HWMON_NEW_PACK_ENABLE 6
/* Old package format */
#define _HWMON_OLD_PACK_SIZE 5
#define _HWMON_OLD_PACK_FLAGS 0
#define _HWMON_OLD_PACK_NAME 1
#define _HWMON_OLD_PACK_LIMIT1 2
#define _HWMON_OLD_PACK_LIMIT2 3
#define _HWMON_OLD_PACK_ENABLE 4
struct atk_data {
struct device *hwmon_dev;
acpi_handle atk_handle;
struct acpi_device *acpi_dev;
bool old_interface;
/* old interface */
acpi_handle rtmp_handle;
acpi_handle rvlt_handle;
acpi_handle rfan_handle;
/* new inteface */
acpi_handle enumerate_handle;
acpi_handle read_handle;
acpi_handle write_handle;
bool disable_ec;
int voltage_count;
int temperature_count;
int fan_count;
struct list_head sensor_list;
};
typedef ssize_t (*sysfs_show_func)(struct device *dev,
struct device_attribute *attr, char *buf);
static const struct acpi_device_id atk_ids[] = {
{ATK_HID, 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, atk_ids);
#define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
struct atk_sensor_data {
struct list_head list;
struct atk_data *data;
struct device_attribute label_attr;
struct device_attribute input_attr;
struct device_attribute limit1_attr;
struct device_attribute limit2_attr;
char label_attr_name[ATTR_NAME_SIZE];
char input_attr_name[ATTR_NAME_SIZE];
char limit1_attr_name[ATTR_NAME_SIZE];
char limit2_attr_name[ATTR_NAME_SIZE];
u64 id;
u64 type;
u64 limit1;
u64 limit2;
u64 cached_value;
unsigned long last_updated; /* in jiffies */
bool is_valid;
char const *acpi_name;
};
/* Return buffer format:
* [0-3] "value" is valid flag
* [4-7] value
* [8- ] unknown stuff on newer mobos
*/
struct atk_acpi_ret_buffer {
u32 flags;
u32 value;
u8 data[];
};
/* Input buffer used for GITM and SITM methods */
struct atk_acpi_input_buf {
u32 id;
u32 param1;
u32 param2;
};
static int atk_add(struct acpi_device *device);
static int atk_remove(struct acpi_device *device, int type);
static void atk_print_sensor(struct atk_data *data, union acpi_object *obj);
static int atk_read_value(struct atk_sensor_data *sensor, u64 *value);
static void atk_free_sensors(struct atk_data *data);
static struct acpi_driver atk_driver = {
.name = ATK_HID,
.class = "hwmon",
.ids = atk_ids,
.ops = {
.add = atk_add,
.remove = atk_remove,
},
};
#define input_to_atk_sensor(attr) \
container_of(attr, struct atk_sensor_data, input_attr)
#define label_to_atk_sensor(attr) \
container_of(attr, struct atk_sensor_data, label_attr)
#define limit1_to_atk_sensor(attr) \
container_of(attr, struct atk_sensor_data, limit1_attr)
#define limit2_to_atk_sensor(attr) \
container_of(attr, struct atk_sensor_data, limit2_attr)
static ssize_t atk_input_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct atk_sensor_data *s = input_to_atk_sensor(attr);
u64 value;
int err;
err = atk_read_value(s, &value);
if (err)
return err;
if (s->type == HWMON_TYPE_TEMP)
/* ACPI returns decidegree */
value *= 100;
return sprintf(buf, "%llu\n", value);
}
static ssize_t atk_label_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct atk_sensor_data *s = label_to_atk_sensor(attr);
return sprintf(buf, "%s\n", s->acpi_name);
}
static ssize_t atk_limit1_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct atk_sensor_data *s = limit1_to_atk_sensor(attr);
u64 value = s->limit1;
if (s->type == HWMON_TYPE_TEMP)
value *= 100;
return sprintf(buf, "%lld\n", value);
}
static ssize_t atk_limit2_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct atk_sensor_data *s = limit2_to_atk_sensor(attr);
u64 value = s->limit2;
if (s->type == HWMON_TYPE_TEMP)
value *= 100;
return sprintf(buf, "%lld\n", value);
}
static ssize_t atk_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "atk0110\n");
}
static struct device_attribute atk_name_attr =
__ATTR(name, 0444, atk_name_show, NULL);
static void atk_init_attribute(struct device_attribute *attr, char *name,
sysfs_show_func show)
{
attr->attr.name = name;
attr->attr.mode = 0444;
attr->show = show;
attr->store = NULL;
}
static union acpi_object *atk_get_pack_member(struct atk_data *data,
union acpi_object *pack,
enum atk_pack_member m)
{
bool old_if = data->old_interface;
int offset;
switch (m) {
case HWMON_PACK_FLAGS:
offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS;
break;
case HWMON_PACK_NAME:
offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME;
break;
case HWMON_PACK_LIMIT1:
offset = old_if ? _HWMON_OLD_PACK_LIMIT1 :
_HWMON_NEW_PACK_LIMIT1;
break;
case HWMON_PACK_LIMIT2:
offset = old_if ? _HWMON_OLD_PACK_LIMIT2 :
_HWMON_NEW_PACK_LIMIT2;
break;
case HWMON_PACK_ENABLE:
offset = old_if ? _HWMON_OLD_PACK_ENABLE :
_HWMON_NEW_PACK_ENABLE;
break;
default:
return NULL;
}
return &pack->package.elements[offset];
}
/* New package format is:
* - flag (int)
* class - used for de-muxing the request to the correct GITn
* type (volt, temp, fan)
* sensor id |
* sensor id - used for de-muxing the request _inside_ the GITn
* - name (str)
* - unknown (int)
* - unknown (int)
* - limit1 (int)
* - limit2 (int)
* - enable (int)
*
* The old package has the same format but it's missing the two unknown fields.
*/
static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj)
{
struct device *dev = &data->acpi_dev->dev;
union acpi_object *tmp;
bool old_if = data->old_interface;
int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE :
_HWMON_NEW_PACK_SIZE;
if (obj->type != ACPI_TYPE_PACKAGE) {
dev_warn(dev, "Invalid type: %d\n", obj->type);
return -EINVAL;
}
if (obj->package.count != expected_size) {
dev_warn(dev, "Invalid package size: %d, expected: %d\n",
obj->package.count, expected_size);
return -EINVAL;
}
tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
if (tmp->type != ACPI_TYPE_INTEGER) {
dev_warn(dev, "Invalid type (flag): %d\n", tmp->type);
return -EINVAL;
}
tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
if (tmp->type != ACPI_TYPE_STRING) {
dev_warn(dev, "Invalid type (name): %d\n", tmp->type);
return -EINVAL;
}
/* Don't check... we don't know what they're useful for anyway */
#if 0
tmp = &obj->package.elements[HWMON_PACK_UNK1];
if (tmp->type != ACPI_TYPE_INTEGER) {
dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type);
return -EINVAL;
}
tmp = &obj->package.elements[HWMON_PACK_UNK2];
if (tmp->type != ACPI_TYPE_INTEGER) {
dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type);
return -EINVAL;
}
#endif
tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
if (tmp->type != ACPI_TYPE_INTEGER) {
dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type);
return -EINVAL;
}
tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
if (tmp->type != ACPI_TYPE_INTEGER) {
dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type);
return -EINVAL;
}
tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
if (tmp->type != ACPI_TYPE_INTEGER) {
dev_warn(dev, "Invalid type (enable): %d\n", tmp->type);
return -EINVAL;
}
atk_print_sensor(data, obj);
return 0;
}
#ifdef DEBUG
static char const *atk_sensor_type(union acpi_object *flags)
{
u64 type = flags->integer.value & ATK_TYPE_MASK;
char const *what;
switch (type) {
case HWMON_TYPE_VOLT:
what = "voltage";
break;
case HWMON_TYPE_TEMP:
what = "temperature";
break;
case HWMON_TYPE_FAN:
what = "fan";
break;
default:
what = "unknown";
break;
}
return what;
}
#endif
static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
{
#ifdef DEBUG
struct device *dev = &data->acpi_dev->dev;
union acpi_object *flags;
union acpi_object *name;
union acpi_object *limit1;
union acpi_object *limit2;
union acpi_object *enable;
char const *what;
flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
what = atk_sensor_type(flags);
dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what,
flags->integer.value,
name->string.pointer,
limit1->integer.value, limit2->integer.value,
enable->integer.value ? "enabled" : "disabled");
#endif
}
static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
{
struct atk_data *data = sensor->data;
struct device *dev = &data->acpi_dev->dev;
struct acpi_object_list params;
union acpi_object id;
acpi_status status;
acpi_handle method;
switch (sensor->type) {
case HWMON_TYPE_VOLT:
method = data->rvlt_handle;
break;
case HWMON_TYPE_TEMP:
method = data->rtmp_handle;
break;
case HWMON_TYPE_FAN:
method = data->rfan_handle;
break;
default:
return -EINVAL;
}
id.type = ACPI_TYPE_INTEGER;
id.integer.value = sensor->id;
params.count = 1;
params.pointer = &id;
status = acpi_evaluate_integer(method, NULL, ¶ms, value);
if (status != AE_OK) {
dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
acpi_format_exception(status));
return -EIO;
}
return 0;
}
static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux)
{
struct device *dev = &data->acpi_dev->dev;
struct acpi_buffer buf;
acpi_status ret;
struct acpi_object_list params;
union acpi_object id;
union acpi_object *pack;
id.type = ACPI_TYPE_INTEGER;
id.integer.value = mux;
params.count = 1;
params.pointer = &id;
buf.length = ACPI_ALLOCATE_BUFFER;
ret = acpi_evaluate_object(data->enumerate_handle, NULL, ¶ms, &buf);
if (ret != AE_OK) {
dev_err(dev, "GGRP[%#x] ACPI exception: %s\n", mux,
acpi_format_exception(ret));
return ERR_PTR(-EIO);
}
pack = buf.pointer;
if (pack->type != ACPI_TYPE_PACKAGE) {
/* Execution was successful, but the id was not found */
ACPI_FREE(pack);
return ERR_PTR(-ENOENT);
}
if (pack->package.count < 1) {
dev_err(dev, "GGRP[%#x] package is too small\n", mux);
ACPI_FREE(pack);
return ERR_PTR(-EIO);
}
return pack;
}
static union acpi_object *atk_gitm(struct atk_data *data, u64 id)
{
struct device *dev = &data->acpi_dev->dev;
struct atk_acpi_input_buf buf;
union acpi_object tmp;
struct acpi_object_list params;
struct acpi_buffer ret;
union acpi_object *obj;
acpi_status status;
buf.id = id;
buf.param1 = 0;
buf.param2 = 0;
tmp.type = ACPI_TYPE_BUFFER;
tmp.buffer.pointer = (u8 *)&buf;
tmp.buffer.length = sizeof(buf);
params.count = 1;
params.pointer = (void *)&tmp;
ret.length = ACPI_ALLOCATE_BUFFER;
status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms,
&ret, ACPI_TYPE_BUFFER);
if (status != AE_OK) {
dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id,
acpi_format_exception(status));
return ERR_PTR(-EIO);
}
obj = ret.pointer;
/* Sanity check */
if (obj->buffer.length < 8) {
dev_warn(dev, "Unexpected ASBF length: %u\n",
obj->buffer.length);
ACPI_FREE(obj);
return ERR_PTR(-EIO);
}
return obj;
}
static union acpi_object *atk_sitm(struct atk_data *data,
struct atk_acpi_input_buf *buf)
{
struct device *dev = &data->acpi_dev->dev;
struct acpi_object_list params;
union acpi_object tmp;
struct acpi_buffer ret;
union acpi_object *obj;
acpi_status status;
tmp.type = ACPI_TYPE_BUFFER;
tmp.buffer.pointer = (u8 *)buf;
tmp.buffer.length = sizeof(*buf);
params.count = 1;
params.pointer = &tmp;
ret.length = ACPI_ALLOCATE_BUFFER;
status = acpi_evaluate_object_typed(data->write_handle, NULL, ¶ms,
&ret, ACPI_TYPE_BUFFER);
if (status != AE_OK) {
dev_warn(dev, "SITM[%#x] ACPI exception: %s\n", buf->id,
acpi_format_exception(status));
return ERR_PTR(-EIO);
}
obj = ret.pointer;
/* Sanity check */
if (obj->buffer.length < 8) {
dev_warn(dev, "Unexpected ASBF length: %u\n",
obj->buffer.length);
ACPI_FREE(obj);
return ERR_PTR(-EIO);
}
return obj;
}
static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
{
struct atk_data *data = sensor->data;
struct device *dev = &data->acpi_dev->dev;
union acpi_object *obj;
struct atk_acpi_ret_buffer *buf;
int err = 0;
obj = atk_gitm(data, sensor->id);
if (IS_ERR(obj))
return PTR_ERR(obj);
buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
if (buf->flags == 0) {
/* The reading is not valid, possible causes:
* - sensor failure
* - enumeration was FUBAR (and we didn't notice)
*/
dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id);
err = -EIO;
goto out;
}
*value = buf->value;
out:
ACPI_FREE(obj);
return err;
}
static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
{
int err;
if (!sensor->is_valid ||
time_after(jiffies, sensor->last_updated + CACHE_TIME)) {
if (sensor->data->old_interface)
err = atk_read_value_old(sensor, value);
else
err = atk_read_value_new(sensor, value);
sensor->is_valid = true;
sensor->last_updated = jiffies;
sensor->cached_value = *value;
} else {
*value = sensor->cached_value;
err = 0;
}
return err;
}
static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
{
struct device *dev = &data->acpi_dev->dev;
union acpi_object *flags;
union acpi_object *name;
union acpi_object *limit1;
union acpi_object *limit2;
union acpi_object *enable;
struct atk_sensor_data *sensor;
char const *base_name;
char const *limit1_name;
char const *limit2_name;
u64 type;
int err;
int *num;
int start;
if (obj->type != ACPI_TYPE_PACKAGE) {
/* wft is this? */
dev_warn(dev, "Unknown type for ACPI object: (%d)\n",
obj->type);
return -EINVAL;
}
err = validate_hwmon_pack(data, obj);
if (err)
return err;
/* Ok, we have a valid hwmon package */
type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value
& ATK_TYPE_MASK;
switch (type) {
case HWMON_TYPE_VOLT:
base_name = "in";
limit1_name = "min";
limit2_name = "max";
num = &data->voltage_count;
start = 0;
break;
case HWMON_TYPE_TEMP:
base_name = "temp";
limit1_name = "max";
limit2_name = "crit";
num = &data->temperature_count;
start = 1;
break;
case HWMON_TYPE_FAN:
base_name = "fan";
limit1_name = "min";
limit2_name = "max";
num = &data->fan_count;
start = 1;
break;
default:
dev_warn(dev, "Unknown sensor type: %#llx\n", type);
return -EINVAL;
}
enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
if (!enable->integer.value)
/* sensor is disabled */
return 0;
flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
if (!sensor)
return -ENOMEM;
sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL);
if (!sensor->acpi_name) {
err = -ENOMEM;
goto out;
}
INIT_LIST_HEAD(&sensor->list);
sensor->type = type;
sensor->data = data;
sensor->id = flags->integer.value;
sensor->limit1 = limit1->integer.value;
if (data->old_interface)
sensor->limit2 = limit2->integer.value;
else
/* The upper limit is expressed as delta from lower limit */
sensor->limit2 = sensor->limit1 + limit2->integer.value;
snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
"%s%d_input", base_name, start + *num);
atk_init_attribute(&sensor->input_attr,
sensor->input_attr_name,
atk_input_show);
snprintf(sensor->label_attr_name, ATTR_NAME_SIZE,
"%s%d_label", base_name, start + *num);
atk_init_attribute(&sensor->label_attr,
sensor->label_attr_name,
atk_label_show);
snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE,
"%s%d_%s", base_name, start + *num, limit1_name);
atk_init_attribute(&sensor->limit1_attr,
sensor->limit1_attr_name,
atk_limit1_show);
snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE,
"%s%d_%s", base_name, start + *num, limit2_name);
atk_init_attribute(&sensor->limit2_attr,
sensor->limit2_attr_name,
atk_limit2_show);
list_add(&sensor->list, &data->sensor_list);
(*num)++;
return 1;
out:
kfree(sensor->acpi_name);
kfree(sensor);
return err;
}
static int atk_enumerate_old_hwmon(struct atk_data *data)
{
struct device *dev = &data->acpi_dev->dev;
struct acpi_buffer buf;
union acpi_object *pack;
acpi_status status;
int i, ret;
int count = 0;
/* Voltages */
buf.length = ACPI_ALLOCATE_BUFFER;
status = acpi_evaluate_object_typed(data->atk_handle,
METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE);
if (status != AE_OK) {
dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n",
acpi_format_exception(status));
return -ENODEV;
}
pack = buf.pointer;
for (i = 1; i < pack->package.count; i++) {
union acpi_object *obj = &pack->package.elements[i];
ret = atk_add_sensor(data, obj);
if (ret > 0)
count++;
}
ACPI_FREE(buf.pointer);
/* Temperatures */
buf.length = ACPI_ALLOCATE_BUFFER;
status = acpi_evaluate_object_typed(data->atk_handle,
METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE);
if (status != AE_OK) {
dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n",
acpi_format_exception(status));
ret = -ENODEV;
goto cleanup;
}
pack = buf.pointer;
for (i = 1; i < pack->package.count; i++) {
union acpi_object *obj = &pack->package.elements[i];
ret = atk_add_sensor(data, obj);
if (ret > 0)
count++;
}
ACPI_FREE(buf.pointer);
/* Fans */
buf.length = ACPI_ALLOCATE_BUFFER;
status = acpi_evaluate_object_typed(data->atk_handle,
METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE);
if (status != AE_OK) {
dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n",
acpi_format_exception(status));
ret = -ENODEV;
goto cleanup;
}
pack = buf.pointer;
for (i = 1; i < pack->package.count; i++) {
union acpi_object *obj = &pack->package.elements[i];
ret = atk_add_sensor(data, obj);
if (ret > 0)
count++;
}
ACPI_FREE(buf.pointer);
return count;
cleanup:
atk_free_sensors(data);
return ret;
}
static int atk_ec_present(struct atk_data *data)
{
struct device *dev = &data->acpi_dev->dev;
union acpi_object *pack;
union acpi_object *ec;
int ret;
int i;
pack = atk_ggrp(data, ATK_MUX_MGMT);
if (IS_ERR(pack)) {
if (PTR_ERR(pack) == -ENOENT) {
/* The MGMT class does not exists - that's ok */
dev_dbg(dev, "Class %#llx not found\n", ATK_MUX_MGMT);
return 0;
}
return PTR_ERR(pack);
}
/* Search the EC */
ec = NULL;
for (i = 0; i < pack->package.count; i++) {
union acpi_object *obj = &pack->package.elements[i];
union acpi_object *id;
if (obj->type != ACPI_TYPE_PACKAGE)
continue;
id = &obj->package.elements[0];
if (id->type != ACPI_TYPE_INTEGER)
continue;
if (id->integer.value == ATK_EC_ID) {
ec = obj;
break;
}
}
ret = (ec != NULL);
if (!ret)
/* The system has no EC */
dev_dbg(dev, "EC not found\n");
ACPI_FREE(pack);
return ret;
}
static int atk_ec_enabled(struct atk_data *data)
{
struct device *dev = &data->acpi_dev->dev;
union acpi_object *obj;
struct atk_acpi_ret_buffer *buf;
int err;
obj = atk_gitm(data, ATK_EC_ID);
if (IS_ERR(obj)) {
dev_err(dev, "Unable to query EC status\n");
return PTR_ERR(obj);
}
buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
if (buf->flags == 0) {
dev_err(dev, "Unable to query EC status\n");
err = -EIO;
} else {
err = (buf->value != 0);
dev_dbg(dev, "EC is %sabled\n",
err ? "en" : "dis");
}
ACPI_FREE(obj);
return err;
}
static int atk_ec_ctl(struct atk_data *data, int enable)
{
struct device *dev = &data->acpi_dev->dev;
union acpi_object *obj;
struct atk_acpi_input_buf sitm;
struct atk_acpi_ret_buffer *ec_ret;
int err = 0;
sitm.id = ATK_EC_ID;
sitm.param1 = enable;
sitm.param2 = 0;
obj = atk_sitm(data, &sitm);
if (IS_ERR(obj)) {
dev_err(dev, "Failed to %sable the EC\n",
enable ? "en" : "dis");
return PTR_ERR(obj);
}
ec_ret = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
if (ec_ret->flags == 0) {
dev_err(dev, "Failed to %sable the EC\n",
enable ? "en" : "dis");
err = -EIO;
} else {
dev_info(dev, "EC %sabled\n",
enable ? "en" : "dis");
}
ACPI_FREE(obj);
return err;
}
static int atk_enumerate_new_hwmon(struct atk_data *data)
{
struct device *dev = &data->acpi_dev->dev;
union acpi_object *pack;
int err;
int i;
err = atk_ec_present(data);
if (err < 0)
return err;
if (err) {
err = atk_ec_enabled(data);
if (err < 0)
return err;
/* If the EC was disabled we will disable it again on unload */
data->disable_ec = err;
err = atk_ec_ctl(data, 1);
if (err) {
data->disable_ec = false;
return err;
}
}
dev_dbg(dev, "Enumerating hwmon sensors\n");
pack = atk_ggrp(data, ATK_MUX_HWMON);
if (IS_ERR(pack))
return PTR_ERR(pack);
for (i = 0; i < pack->package.count; i++) {
union acpi_object *obj = &pack->package.elements[i];
atk_add_sensor(data, obj);
}
err = data->voltage_count + data->temperature_count + data->fan_count;
ACPI_FREE(pack);
return err;
}
static int atk_create_files(struct atk_data *data)
{
struct atk_sensor_data *s;
int err;
list_for_each_entry(s, &data->sensor_list, list) {
err = device_create_file(data->hwmon_dev, &s->input_attr);
if (err)
return err;
err = device_create_file(data->hwmon_dev, &s->label_attr);
if (err)
return err;
err = device_create_file(data->hwmon_dev, &s->limit1_attr);
if (err)
return err;
err = device_create_file(data->hwmon_dev, &s->limit2_attr);
if (err)
return err;
}
err = device_create_file(data->hwmon_dev, &atk_name_attr);
return err;