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/*
* Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <acpi/acpi_drivers.h>
MODULE_LICENSE("GPL");
static ssize_t irst_show_wakeup_events(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct acpi_device *acpi;
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *result;
acpi_status status;
acpi = to_acpi_device(dev);
status = acpi_evaluate_object(acpi->handle, "GFFS", NULL, &output);
if (!ACPI_SUCCESS(status))
return -EINVAL;
result = output.pointer;
if (result->type != ACPI_TYPE_INTEGER) {
kfree(result);
return -EINVAL;
}
return sprintf(buf, "%lld\n", result->integer.value);
}
static ssize_t irst_store_wakeup_events(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi;
struct acpi_object_list input;
union acpi_object param;
acpi_status status;
unsigned long value;
int error;
acpi = to_acpi_device(dev);
error = kstrtoul(buf, 0, &value);
if (error)
return error;
param.type = ACPI_TYPE_INTEGER;
param.integer.value = value;
input.count = 1;
input.pointer = ¶m;
status = acpi_evaluate_object(acpi->handle, "SFFS", &input, NULL);
if (!ACPI_SUCCESS(status))
return -EINVAL;
return count;
}
static struct device_attribute irst_wakeup_attr = {
.attr = { .name = "wakeup_events", .mode = 0600 },
.show = irst_show_wakeup_events,
.store = irst_store_wakeup_events
};
static ssize_t irst_show_wakeup_time(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct acpi_device *acpi;
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *result;
acpi_status status;
acpi = to_acpi_device(dev);
status = acpi_evaluate_object(acpi->handle, "GFTV", NULL, &output);
if (!ACPI_SUCCESS(status))
return -EINVAL;
result = output.pointer;
if (result->type != ACPI_TYPE_INTEGER) {
kfree(result);
return -EINVAL;
}
return sprintf(buf, "%lld\n", result->integer.value);
}
static ssize_t irst_store_wakeup_time(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi;
struct acpi_object_list input;
union acpi_object param;
acpi_status status;
unsigned long value;
int error;
acpi = to_acpi_device(dev);
error = kstrtoul(buf, 0, &value);
if (error)
return error;
param.type = ACPI_TYPE_INTEGER;
param.integer.value = value;
input.count = 1;
input.pointer = ¶m;
status = acpi_evaluate_object(acpi->handle, "SFTV", &input, NULL);
if (!ACPI_SUCCESS(status))
return -EINVAL;
return count;
}
static struct device_attribute irst_timeout_attr = {
.attr = { .name = "wakeup_time", .mode = 0600 },
.show = irst_show_wakeup_time,
.store = irst_store_wakeup_time
};
static int irst_add(struct acpi_device *acpi)
{
int error = 0;
error = device_create_file(&acpi->dev, &irst_timeout_attr);
if (error)
goto out;
error = device_create_file(&acpi->dev, &irst_wakeup_attr);
if (error)
goto out_timeout;
return 0;
out_timeout:
device_remove_file(&acpi->dev, &irst_timeout_attr);
out:
return error;
}
static int irst_remove(struct acpi_device *acpi)
{
device_remove_file(&acpi->dev, &irst_wakeup_attr);
device_remove_file(&acpi->dev, &irst_timeout_attr);
return 0;
}
static const struct acpi_device_id irst_ids[] = {
{"INT3392", 0},
{"", 0}
};
static struct acpi_driver irst_driver = {
.owner = THIS_MODULE,
.name = "intel_rapid_start",
.class = "intel_rapid_start",
.ids = irst_ids,
.ops = {
.add = irst_add,
.remove = irst_remove,
},
};
static int irst_init(void)
{
return acpi_bus_register_driver(&irst_driver);
}
static void irst_exit(void)
{
acpi_bus_unregister_driver(&irst_driver);
}
module_init(irst_init);
module_exit(irst_exit);
MODULE_DEVICE_TABLE(acpi, irst_ids);
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