211 lines
6.3 KiB
C
211 lines
6.3 KiB
C
/******************************************************************************
|
|
*
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
|
* redistributing this file, you may do so under either license.
|
|
*
|
|
* GPL LICENSE SUMMARY
|
|
*
|
|
* Copyright(c) 2017 Intel Deutschland GmbH
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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;
|
|
*
|
|
* The full GNU General Public License is included in this distribution
|
|
* in the file called COPYING.
|
|
*
|
|
* Contact Information:
|
|
* Intel Linux Wireless <linuxwifi@intel.com>
|
|
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
|
|
*
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright(c) 2017 Intel Deutschland GmbH
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include "iwl-drv.h"
|
|
#include "iwl-debug.h"
|
|
#include "acpi.h"
|
|
|
|
void *iwl_acpi_get_object(struct device *dev, acpi_string method)
|
|
{
|
|
acpi_handle root_handle;
|
|
acpi_handle handle;
|
|
struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
acpi_status status;
|
|
|
|
root_handle = ACPI_HANDLE(dev);
|
|
if (!root_handle) {
|
|
IWL_DEBUG_DEV_RADIO(dev,
|
|
"Could not retrieve root port ACPI handle\n");
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
/* Get the method's handle */
|
|
status = acpi_get_handle(root_handle, method, &handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
IWL_DEBUG_DEV_RADIO(dev, "%s method not found\n", method);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
/* Call the method with no arguments */
|
|
status = acpi_evaluate_object(handle, NULL, NULL, &buf);
|
|
if (ACPI_FAILURE(status)) {
|
|
IWL_DEBUG_DEV_RADIO(dev, "%s invocation failed (0x%x)\n",
|
|
method, status);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
return buf.pointer;
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_acpi_get_object);
|
|
|
|
union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev,
|
|
union acpi_object *data,
|
|
int data_size)
|
|
{
|
|
int i;
|
|
union acpi_object *wifi_pkg;
|
|
|
|
/*
|
|
* We need at least one entry in the wifi package that
|
|
* describes the domain, and one more entry, otherwise there's
|
|
* no point in reading it.
|
|
*/
|
|
if (WARN_ON_ONCE(data_size < 2))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
/*
|
|
* We need at least two packages, one for the revision and one
|
|
* for the data itself. Also check that the revision is valid
|
|
* (i.e. it is an integer set to 0).
|
|
*/
|
|
if (data->type != ACPI_TYPE_PACKAGE ||
|
|
data->package.count < 2 ||
|
|
data->package.elements[0].type != ACPI_TYPE_INTEGER ||
|
|
data->package.elements[0].integer.value != 0) {
|
|
IWL_DEBUG_DEV_RADIO(dev, "Unsupported packages structure\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
/* loop through all the packages to find the one for WiFi */
|
|
for (i = 1; i < data->package.count; i++) {
|
|
union acpi_object *domain;
|
|
|
|
wifi_pkg = &data->package.elements[i];
|
|
|
|
/* skip entries that are not a package with the right size */
|
|
if (wifi_pkg->type != ACPI_TYPE_PACKAGE ||
|
|
wifi_pkg->package.count != data_size)
|
|
continue;
|
|
|
|
domain = &wifi_pkg->package.elements[0];
|
|
if (domain->type == ACPI_TYPE_INTEGER &&
|
|
domain->integer.value == ACPI_WIFI_DOMAIN)
|
|
goto found;
|
|
}
|
|
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
found:
|
|
return wifi_pkg;
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_acpi_get_wifi_pkg);
|
|
|
|
int iwl_acpi_get_mcc(struct device *dev, char *mcc)
|
|
{
|
|
union acpi_object *wifi_pkg, *data;
|
|
u32 mcc_val;
|
|
int ret;
|
|
|
|
data = iwl_acpi_get_object(dev, ACPI_WRDD_METHOD);
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_WRDD_WIFI_DATA_SIZE);
|
|
if (IS_ERR(wifi_pkg)) {
|
|
ret = PTR_ERR(wifi_pkg);
|
|
goto out_free;
|
|
}
|
|
|
|
if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) {
|
|
ret = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
mcc_val = wifi_pkg->package.elements[1].integer.value;
|
|
|
|
mcc[0] = (mcc_val >> 8) & 0xff;
|
|
mcc[1] = mcc_val & 0xff;
|
|
mcc[2] = '\0';
|
|
|
|
ret = 0;
|
|
out_free:
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_acpi_get_mcc);
|
|
|
|
u64 iwl_acpi_get_pwr_limit(struct device *dev)
|
|
{
|
|
union acpi_object *data, *wifi_pkg;
|
|
u64 dflt_pwr_limit;
|
|
|
|
data = iwl_acpi_get_object(dev, ACPI_SPLC_METHOD);
|
|
if (IS_ERR(data)) {
|
|
dflt_pwr_limit = 0;
|
|
goto out;
|
|
}
|
|
|
|
wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data,
|
|
ACPI_SPLC_WIFI_DATA_SIZE);
|
|
if (IS_ERR(wifi_pkg) ||
|
|
wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER) {
|
|
dflt_pwr_limit = 0;
|
|
goto out_free;
|
|
}
|
|
|
|
dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value;
|
|
out_free:
|
|
kfree(data);
|
|
out:
|
|
return dflt_pwr_limit;
|
|
}
|
|
IWL_EXPORT_SYMBOL(iwl_acpi_get_pwr_limit);
|