300 lines
10 KiB
C
300 lines
10 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 - 2011 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 - 2011 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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/******************************************************************************
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*
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* EEPROM related functions
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*
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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 = iwlagn_eeprom_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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int iwl_eeprom_check_sku(struct iwl_priv *priv)
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{
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u16 radio_cfg;
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if (!priv->cfg->sku) {
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/* not using sku overwrite */
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priv->cfg->sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP);
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if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE &&
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!priv->cfg->ht_params) {
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IWL_ERR(priv, "Invalid 11n configuration\n");
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return -EINVAL;
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}
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}
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if (!priv->cfg->sku) {
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IWL_ERR(priv, "Invalid device sku\n");
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return -EINVAL;
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}
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IWL_INFO(priv, "Device SKU: 0X%x\n", priv->cfg->sku);
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if (!priv->cfg->valid_tx_ant && !priv->cfg->valid_rx_ant) {
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/* not using .cfg overwrite */
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radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
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priv->cfg->valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
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priv->cfg->valid_rx_ant = EEPROM_RF_CFG_RX_ANT_MSK(radio_cfg);
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if (!priv->cfg->valid_tx_ant || !priv->cfg->valid_rx_ant) {
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IWL_ERR(priv, "Invalid chain (0X%x, 0X%x)\n",
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priv->cfg->valid_tx_ant,
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priv->cfg->valid_rx_ant);
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return -EINVAL;
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}
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IWL_INFO(priv, "Valid Tx ant: 0X%x, Valid Rx ant: 0X%x\n",
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priv->cfg->valid_tx_ant, priv->cfg->valid_rx_ant);
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}
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/*
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* for some special cases,
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* EEPROM did not reflect the correct antenna setting
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* so overwrite the valid tx/rx antenna from .cfg
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*/
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return 0;
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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 = iwl_eeprom_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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/* 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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static void
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iwlcore_eeprom_enh_txp_read_element(struct iwl_priv *priv,
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struct iwl_eeprom_enhanced_txpwr *txp,
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s8 max_txpower_avg)
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{
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int ch_idx;
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bool is_ht40 = txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ;
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enum ieee80211_band band;
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band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ?
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IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
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for (ch_idx = 0; ch_idx < priv->channel_count; ch_idx++) {
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struct iwl_channel_info *ch_info = &priv->channel_info[ch_idx];
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/* update matching channel or from common data only */
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if (txp->channel != 0 && ch_info->channel != txp->channel)
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continue;
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/* update matching band only */
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if (band != ch_info->band)
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continue;
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if (ch_info->max_power_avg < max_txpower_avg && !is_ht40) {
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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 (is_ht40 && ch_info->ht40_max_power_avg < max_txpower_avg)
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ch_info->ht40_max_power_avg = max_txpower_avg;
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}
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}
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#define EEPROM_TXP_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT)
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#define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr)
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#define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE)
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#define TXP_CHECK_AND_PRINT(x) ((txp->flags & IWL_EEPROM_ENH_TXP_FL_##x) \
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? # x " " : "")
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void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
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{
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struct iwl_eeprom_enhanced_txpwr *txp_array, *txp;
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int idx, entries;
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__le16 *txp_len;
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s8 max_txp_avg, max_txp_avg_halfdbm;
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BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8);
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/* the length is in 16-bit words, but we want entries */
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txp_len = (__le16 *) iwl_eeprom_query_addr(priv, EEPROM_TXP_SZ_OFFS);
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entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN;
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txp_array = (void *) iwl_eeprom_query_addr(priv, EEPROM_TXP_OFFS);
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for (idx = 0; idx < entries; idx++) {
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txp = &txp_array[idx];
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/* skip invalid entries */
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if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID))
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continue;
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IWL_DEBUG_EEPROM(priv, "%s %d:\t %s%s%s%s%s%s%s%s (0x%02x)\n",
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(txp->channel && (txp->flags &
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IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE)) ?
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"Common " : (txp->channel) ?
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"Channel" : "Common",
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(txp->channel),
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TXP_CHECK_AND_PRINT(VALID),
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TXP_CHECK_AND_PRINT(BAND_52G),
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TXP_CHECK_AND_PRINT(OFDM),
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TXP_CHECK_AND_PRINT(40MHZ),
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TXP_CHECK_AND_PRINT(HT_AP),
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TXP_CHECK_AND_PRINT(RES1),
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TXP_CHECK_AND_PRINT(RES2),
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TXP_CHECK_AND_PRINT(COMMON_TYPE),
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txp->flags);
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IWL_DEBUG_EEPROM(priv, "\t\t chain_A: 0x%02x "
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"chain_B: 0X%02x chain_C: 0X%02x\n",
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txp->chain_a_max, txp->chain_b_max,
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txp->chain_c_max);
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IWL_DEBUG_EEPROM(priv, "\t\t MIMO2: 0x%02x "
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"MIMO3: 0x%02x High 20_on_40: 0x%02x "
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"Low 20_on_40: 0x%02x\n",
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txp->mimo2_max, txp->mimo3_max,
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((txp->delta_20_in_40 & 0xf0) >> 4),
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(txp->delta_20_in_40 & 0x0f));
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max_txp_avg = iwl_get_max_txpower_avg(priv, txp_array, idx,
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&max_txp_avg_halfdbm);
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/*
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* Update the user limit values values to the highest
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* power supported by any channel
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*/
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if (max_txp_avg > priv->tx_power_user_lmt)
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priv->tx_power_user_lmt = max_txp_avg;
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if (max_txp_avg_halfdbm > priv->tx_power_lmt_in_half_dbm)
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priv->tx_power_lmt_in_half_dbm = max_txp_avg_halfdbm;
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iwlcore_eeprom_enh_txp_read_element(priv, txp, max_txp_avg);
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}
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}
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