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3be63ff0ae
Some of the functions in iwl-eeprom.c file are for agn devices only, Those functions do not have to be part of iwlcore.ko, so move those to iwl-agn-eeprom.c file. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
455 lines
15 KiB
C
455 lines
15 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <net/mac80211.h>
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#include "iwl-commands.h"
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-debug.h"
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#include "iwl-agn.h"
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#include "iwl-io.h"
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/************************** EEPROM BANDS ****************************
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*
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* The iwl_eeprom_band definitions below provide the mapping from the
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* EEPROM contents to the specific channel number supported for each
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* band.
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*
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* For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
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* definition below maps to physical channel 42 in the 5.2GHz spectrum.
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* The specific geography and calibration information for that channel
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* is contained in the eeprom map itself.
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*
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* During init, we copy the eeprom information and channel map
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* information into priv->channel_info_24/52 and priv->channel_map_24/52
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*
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* channel_map_24/52 provides the index in the channel_info array for a
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* given channel. We have to have two separate maps as there is channel
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* overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
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* band_2
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*
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* A value of 0xff stored in the channel_map indicates that the channel
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* is not supported by the hardware at all.
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*
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* A value of 0xfe in the channel_map indicates that the channel is not
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* valid for Tx with the current hardware. This means that
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* while the system can tune and receive on a given channel, it may not
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* be able to associate or transmit any frames on that
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* channel. There is no corresponding channel information for that
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* entry.
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*
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*********************************************************************/
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/**
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* struct iwl_txpwr_section: eeprom section information
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* @offset: indirect address into eeprom image
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* @count: number of "struct iwl_eeprom_enhanced_txpwr" in this section
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* @band: band type for the section
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* @is_common - true: common section, false: channel section
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* @is_cck - true: cck section, false: not cck section
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* @is_ht_40 - true: all channel in the section are HT40 channel,
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* false: legacy or HT 20 MHz
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* ignore if it is common section
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* @iwl_eeprom_section_channel: channel array in the section,
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* ignore if common section
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*/
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struct iwl_txpwr_section {
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u32 offset;
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u8 count;
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enum ieee80211_band band;
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bool is_common;
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bool is_cck;
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bool is_ht40;
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u8 iwl_eeprom_section_channel[EEPROM_MAX_TXPOWER_SECTION_ELEMENTS];
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};
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/**
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* section 1 - 3 are regulatory tx power apply to all channels based on
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* modulation: CCK, OFDM
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* Band: 2.4GHz, 5.2GHz
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* section 4 - 10 are regulatory tx power apply to specified channels
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* For example:
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* 1L - Channel 1 Legacy
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* 1HT - Channel 1 HT
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* (1,+1) - Channel 1 HT40 "_above_"
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*
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* Section 1: all CCK channels
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* Section 2: all 2.4 GHz OFDM (Legacy, HT and HT40) channels
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* Section 3: all 5.2 GHz OFDM (Legacy, HT and HT40) channels
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* Section 4: 2.4 GHz 20MHz channels: 1L, 1HT, 2L, 2HT, 10L, 10HT, 11L, 11HT
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* Section 5: 2.4 GHz 40MHz channels: (1,+1) (2,+1) (6,+1) (7,+1) (9,+1)
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* Section 6: 5.2 GHz 20MHz channels: 36L, 64L, 100L, 36HT, 64HT, 100HT
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* Section 7: 5.2 GHz 40MHz channels: (36,+1) (60,+1) (100,+1)
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* Section 8: 2.4 GHz channel: 13L, 13HT
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* Section 9: 2.4 GHz channel: 140L, 140HT
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* Section 10: 2.4 GHz 40MHz channels: (132,+1) (44,+1)
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*
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*/
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static const struct iwl_txpwr_section enhinfo[] = {
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{ EEPROM_LB_CCK_20_COMMON, 1, IEEE80211_BAND_2GHZ, true, true, false },
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{ EEPROM_LB_OFDM_COMMON, 3, IEEE80211_BAND_2GHZ, true, false, false },
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{ EEPROM_HB_OFDM_COMMON, 3, IEEE80211_BAND_5GHZ, true, false, false },
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{ EEPROM_LB_OFDM_20_BAND, 8, IEEE80211_BAND_2GHZ,
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false, false, false,
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{1, 1, 2, 2, 10, 10, 11, 11 } },
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{ EEPROM_LB_OFDM_HT40_BAND, 5, IEEE80211_BAND_2GHZ,
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false, false, true,
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{ 1, 2, 6, 7, 9 } },
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{ EEPROM_HB_OFDM_20_BAND, 6, IEEE80211_BAND_5GHZ,
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false, false, false,
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{ 36, 64, 100, 36, 64, 100 } },
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{ EEPROM_HB_OFDM_HT40_BAND, 3, IEEE80211_BAND_5GHZ,
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false, false, true,
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{ 36, 60, 100 } },
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{ EEPROM_LB_OFDM_20_CHANNEL_13, 2, IEEE80211_BAND_2GHZ,
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false, false, false,
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{ 13, 13 } },
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{ EEPROM_HB_OFDM_20_CHANNEL_140, 2, IEEE80211_BAND_5GHZ,
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false, false, false,
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{ 140, 140 } },
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{ EEPROM_HB_OFDM_HT40_BAND_1, 2, IEEE80211_BAND_5GHZ,
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false, false, true,
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{ 132, 44 } },
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};
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/******************************************************************************
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*
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* EEPROM related functions
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*
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******************************************************************************/
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/*
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* The device's EEPROM semaphore prevents conflicts between driver and uCode
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* when accessing the EEPROM; each access is a series of pulses to/from the
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* EEPROM chip, not a single event, so even reads could conflict if they
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* weren't arbitrated by the semaphore.
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*/
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int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv)
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{
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u16 count;
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int ret;
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for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
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/* Request semaphore */
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iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
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/* See if we got it */
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ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
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EEPROM_SEM_TIMEOUT);
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if (ret >= 0) {
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IWL_DEBUG_IO(priv,
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"Acquired semaphore after %d tries.\n",
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count+1);
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return ret;
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}
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}
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return ret;
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}
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void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
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{
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iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
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}
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int iwl_eeprom_check_version(struct iwl_priv *priv)
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{
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u16 eeprom_ver;
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u16 calib_ver;
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eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
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calib_ver = priv->cfg->ops->lib->eeprom_ops.calib_version(priv);
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if (eeprom_ver < priv->cfg->eeprom_ver ||
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calib_ver < priv->cfg->eeprom_calib_ver)
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goto err;
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IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n",
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eeprom_ver, calib_ver);
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return 0;
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err:
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IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
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"CALIB=0x%x < 0x%x\n",
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eeprom_ver, priv->cfg->eeprom_ver,
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calib_ver, priv->cfg->eeprom_calib_ver);
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return -EINVAL;
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}
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void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
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{
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const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
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EEPROM_MAC_ADDRESS);
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memcpy(mac, addr, ETH_ALEN);
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}
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/**
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* iwl_get_max_txpower_avg - get the highest tx power from all chains.
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* find the highest tx power from all chains for the channel
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*/
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static s8 iwl_get_max_txpower_avg(struct iwl_priv *priv,
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struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
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int element, s8 *max_txpower_in_half_dbm)
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{
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s8 max_txpower_avg = 0; /* (dBm) */
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IWL_DEBUG_INFO(priv, "%d - "
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"chain_a: %d dB chain_b: %d dB "
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"chain_c: %d dB mimo2: %d dB mimo3: %d dB\n",
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element,
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enhanced_txpower[element].chain_a_max >> 1,
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enhanced_txpower[element].chain_b_max >> 1,
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enhanced_txpower[element].chain_c_max >> 1,
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enhanced_txpower[element].mimo2_max >> 1,
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enhanced_txpower[element].mimo3_max >> 1);
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/* Take the highest tx power from any valid chains */
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if ((priv->cfg->valid_tx_ant & ANT_A) &&
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(enhanced_txpower[element].chain_a_max > max_txpower_avg))
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max_txpower_avg = enhanced_txpower[element].chain_a_max;
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if ((priv->cfg->valid_tx_ant & ANT_B) &&
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(enhanced_txpower[element].chain_b_max > max_txpower_avg))
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max_txpower_avg = enhanced_txpower[element].chain_b_max;
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if ((priv->cfg->valid_tx_ant & ANT_C) &&
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(enhanced_txpower[element].chain_c_max > max_txpower_avg))
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max_txpower_avg = enhanced_txpower[element].chain_c_max;
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if (((priv->cfg->valid_tx_ant == ANT_AB) |
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(priv->cfg->valid_tx_ant == ANT_BC) |
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(priv->cfg->valid_tx_ant == ANT_AC)) &&
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(enhanced_txpower[element].mimo2_max > max_txpower_avg))
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max_txpower_avg = enhanced_txpower[element].mimo2_max;
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if ((priv->cfg->valid_tx_ant == ANT_ABC) &&
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(enhanced_txpower[element].mimo3_max > max_txpower_avg))
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max_txpower_avg = enhanced_txpower[element].mimo3_max;
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/*
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* max. tx power in EEPROM is in 1/2 dBm format
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* convert from 1/2 dBm to dBm (round-up convert)
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* but we also do not want to loss 1/2 dBm resolution which
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* will impact performance
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*/
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*max_txpower_in_half_dbm = max_txpower_avg;
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return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1);
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}
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/**
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* iwl_update_common_txpower: update channel tx power
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* update tx power per band based on EEPROM enhanced tx power info.
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*/
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static s8 iwl_update_common_txpower(struct iwl_priv *priv,
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struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
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int section, int element, s8 *max_txpower_in_half_dbm)
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{
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struct iwl_channel_info *ch_info;
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int ch;
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bool is_ht40 = false;
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s8 max_txpower_avg; /* (dBm) */
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/* it is common section, contain all type (Legacy, HT and HT40)
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* based on the element in the section to determine
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* is it HT 40 or not
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*/
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if (element == EEPROM_TXPOWER_COMMON_HT40_INDEX)
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is_ht40 = true;
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max_txpower_avg =
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iwl_get_max_txpower_avg(priv, enhanced_txpower,
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element, max_txpower_in_half_dbm);
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ch_info = priv->channel_info;
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for (ch = 0; ch < priv->channel_count; ch++) {
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/* find matching band and update tx power if needed */
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if ((ch_info->band == enhinfo[section].band) &&
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(ch_info->max_power_avg < max_txpower_avg) &&
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(!is_ht40)) {
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/* Update regulatory-based run-time data */
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ch_info->max_power_avg = ch_info->curr_txpow =
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max_txpower_avg;
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ch_info->scan_power = max_txpower_avg;
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}
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if ((ch_info->band == enhinfo[section].band) && is_ht40 &&
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(ch_info->ht40_max_power_avg < max_txpower_avg)) {
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/* Update regulatory-based run-time data */
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ch_info->ht40_max_power_avg = max_txpower_avg;
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}
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ch_info++;
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}
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return max_txpower_avg;
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}
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/**
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* iwl_update_channel_txpower: update channel tx power
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* update channel tx power based on EEPROM enhanced tx power info.
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*/
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static s8 iwl_update_channel_txpower(struct iwl_priv *priv,
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struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
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int section, int element, s8 *max_txpower_in_half_dbm)
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{
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struct iwl_channel_info *ch_info;
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int ch;
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u8 channel;
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s8 max_txpower_avg; /* (dBm) */
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channel = enhinfo[section].iwl_eeprom_section_channel[element];
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max_txpower_avg =
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iwl_get_max_txpower_avg(priv, enhanced_txpower,
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element, max_txpower_in_half_dbm);
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ch_info = priv->channel_info;
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for (ch = 0; ch < priv->channel_count; ch++) {
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/* find matching channel and update tx power if needed */
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if (ch_info->channel == channel) {
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if ((ch_info->max_power_avg < max_txpower_avg) &&
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(!enhinfo[section].is_ht40)) {
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/* Update regulatory-based run-time data */
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ch_info->max_power_avg = max_txpower_avg;
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ch_info->curr_txpow = max_txpower_avg;
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ch_info->scan_power = max_txpower_avg;
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}
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if ((enhinfo[section].is_ht40) &&
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(ch_info->ht40_max_power_avg < max_txpower_avg)) {
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/* Update regulatory-based run-time data */
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ch_info->ht40_max_power_avg = max_txpower_avg;
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}
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break;
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}
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ch_info++;
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}
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return max_txpower_avg;
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}
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/**
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* iwlcore_eeprom_enhanced_txpower: process enhanced tx power info
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*/
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void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
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{
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int eeprom_section_count = 0;
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int section, element;
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struct iwl_eeprom_enhanced_txpwr *enhanced_txpower;
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u32 offset;
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s8 max_txpower_avg; /* (dBm) */
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s8 max_txpower_in_half_dbm; /* (half-dBm) */
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/* Loop through all the sections
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* adjust bands and channel's max tx power
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* Set the tx_power_user_lmt to the highest power
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* supported by any channels and chains
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*/
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for (section = 0; section < ARRAY_SIZE(enhinfo); section++) {
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eeprom_section_count = enhinfo[section].count;
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offset = enhinfo[section].offset;
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enhanced_txpower = (struct iwl_eeprom_enhanced_txpwr *)
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iwl_eeprom_query_addr(priv, offset);
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/*
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* check for valid entry -
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* different version of EEPROM might contain different set
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* of enhanced tx power table
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* always check for valid entry before process
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* the information
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*/
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if (!enhanced_txpower->common || enhanced_txpower->reserved)
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continue;
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for (element = 0; element < eeprom_section_count; element++) {
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if (enhinfo[section].is_common)
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max_txpower_avg =
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iwl_update_common_txpower(priv,
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enhanced_txpower, section,
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element,
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&max_txpower_in_half_dbm);
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else
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max_txpower_avg =
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iwl_update_channel_txpower(priv,
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enhanced_txpower, section,
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element,
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&max_txpower_in_half_dbm);
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/* Update the tx_power_user_lmt to the highest power
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|
* supported by any channel */
|
|
if (max_txpower_avg > priv->tx_power_user_lmt)
|
|
priv->tx_power_user_lmt = max_txpower_avg;
|
|
|
|
/*
|
|
* Update the tx_power_lmt_in_half_dbm to
|
|
* the highest power supported by any channel
|
|
*/
|
|
if (max_txpower_in_half_dbm >
|
|
priv->tx_power_lmt_in_half_dbm)
|
|
priv->tx_power_lmt_in_half_dbm =
|
|
max_txpower_in_half_dbm;
|
|
}
|
|
}
|
|
}
|