Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Luciano Coelho | 658 | 100.00% | 5 | 100.00% |
Total | 658 | 5 |
/****************************************************************************** * * 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. * * 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);
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