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534 lines
14 KiB
534 lines
14 KiB
/* |
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* Atheros CARL9170 driver |
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* |
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* MAC programming |
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* |
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* Copyright 2008, Johannes Berg <[email protected]> |
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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 the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU 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; see the file COPYING. If not, see |
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* http://www.gnu.org/licenses/. |
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* |
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* This file incorporates work covered by the following copyright and |
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* permission notice: |
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* Copyright (c) 2007-2008 Atheros Communications, Inc. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <asm/unaligned.h> |
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#include "carl9170.h" |
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#include "cmd.h" |
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int carl9170_set_dyn_sifs_ack(struct ar9170 *ar) |
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{ |
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u32 val; |
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if (conf_is_ht40(&ar->hw->conf)) |
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val = 0x010a; |
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else { |
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if (ar->hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) |
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val = 0x105; |
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else |
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val = 0x104; |
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} |
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return carl9170_write_reg(ar, AR9170_MAC_REG_DYNAMIC_SIFS_ACK, val); |
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} |
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int carl9170_set_rts_cts_rate(struct ar9170 *ar) |
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{ |
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u32 rts_rate, cts_rate; |
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if (conf_is_ht(&ar->hw->conf)) { |
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/* 12 mbit OFDM */ |
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rts_rate = 0x1da; |
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cts_rate = 0x10a; |
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} else { |
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if (ar->hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) { |
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/* 11 mbit CCK */ |
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rts_rate = 033; |
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cts_rate = 003; |
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} else { |
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/* 6 mbit OFDM */ |
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rts_rate = 0x1bb; |
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cts_rate = 0x10b; |
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} |
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} |
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return carl9170_write_reg(ar, AR9170_MAC_REG_RTS_CTS_RATE, |
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rts_rate | (cts_rate) << 16); |
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} |
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int carl9170_set_slot_time(struct ar9170 *ar) |
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{ |
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struct ieee80211_vif *vif; |
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u32 slottime = 20; |
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rcu_read_lock(); |
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vif = carl9170_get_main_vif(ar); |
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if (!vif) { |
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rcu_read_unlock(); |
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return 0; |
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} |
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if ((ar->hw->conf.chandef.chan->band == NL80211_BAND_5GHZ) || |
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vif->bss_conf.use_short_slot) |
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slottime = 9; |
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rcu_read_unlock(); |
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return carl9170_write_reg(ar, AR9170_MAC_REG_SLOT_TIME, |
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slottime << 10); |
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} |
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int carl9170_set_mac_rates(struct ar9170 *ar) |
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{ |
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struct ieee80211_vif *vif; |
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u32 basic, mandatory; |
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rcu_read_lock(); |
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vif = carl9170_get_main_vif(ar); |
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if (!vif) { |
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rcu_read_unlock(); |
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return 0; |
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} |
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basic = (vif->bss_conf.basic_rates & 0xf); |
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basic |= (vif->bss_conf.basic_rates & 0xff0) << 4; |
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rcu_read_unlock(); |
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if (ar->hw->conf.chandef.chan->band == NL80211_BAND_5GHZ) |
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mandatory = 0xff00; /* OFDM 6/9/12/18/24/36/48/54 */ |
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else |
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mandatory = 0xff0f; /* OFDM (6/9../54) + CCK (1/2/5.5/11) */ |
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(AR9170_MAC_REG_BASIC_RATE, basic); |
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carl9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, mandatory); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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} |
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int carl9170_set_qos(struct ar9170 *ar) |
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{ |
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(AR9170_MAC_REG_AC0_CW, ar->edcf[0].cw_min | |
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(ar->edcf[0].cw_max << 16)); |
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carl9170_regwrite(AR9170_MAC_REG_AC1_CW, ar->edcf[1].cw_min | |
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(ar->edcf[1].cw_max << 16)); |
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carl9170_regwrite(AR9170_MAC_REG_AC2_CW, ar->edcf[2].cw_min | |
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(ar->edcf[2].cw_max << 16)); |
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carl9170_regwrite(AR9170_MAC_REG_AC3_CW, ar->edcf[3].cw_min | |
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(ar->edcf[3].cw_max << 16)); |
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carl9170_regwrite(AR9170_MAC_REG_AC4_CW, ar->edcf[4].cw_min | |
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(ar->edcf[4].cw_max << 16)); |
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carl9170_regwrite(AR9170_MAC_REG_AC2_AC1_AC0_AIFS, |
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((ar->edcf[0].aifs * 9 + 10)) | |
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((ar->edcf[1].aifs * 9 + 10) << 12) | |
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((ar->edcf[2].aifs * 9 + 10) << 24)); |
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carl9170_regwrite(AR9170_MAC_REG_AC4_AC3_AC2_AIFS, |
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((ar->edcf[2].aifs * 9 + 10) >> 8) | |
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((ar->edcf[3].aifs * 9 + 10) << 4) | |
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((ar->edcf[4].aifs * 9 + 10) << 16)); |
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carl9170_regwrite(AR9170_MAC_REG_AC1_AC0_TXOP, |
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ar->edcf[0].txop | ar->edcf[1].txop << 16); |
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carl9170_regwrite(AR9170_MAC_REG_AC3_AC2_TXOP, |
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ar->edcf[2].txop | ar->edcf[3].txop << 16 | |
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ar->edcf[4].txop << 24); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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} |
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int carl9170_init_mac(struct ar9170 *ar) |
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{ |
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carl9170_regwrite_begin(ar); |
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/* switch MAC to OTUS interface */ |
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carl9170_regwrite(0x1c3600, 0x3); |
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carl9170_regwrite(AR9170_MAC_REG_ACK_EXTENSION, 0x40); |
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carl9170_regwrite(AR9170_MAC_REG_RETRY_MAX, 0x0); |
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carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER, |
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AR9170_MAC_FTF_MONITOR); |
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/* enable MMIC */ |
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carl9170_regwrite(AR9170_MAC_REG_SNIFFER, |
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AR9170_MAC_SNIFFER_DEFAULTS); |
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carl9170_regwrite(AR9170_MAC_REG_RX_THRESHOLD, 0xc1f80); |
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carl9170_regwrite(AR9170_MAC_REG_RX_PE_DELAY, 0x70); |
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carl9170_regwrite(AR9170_MAC_REG_EIFS_AND_SIFS, 0xa144000); |
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carl9170_regwrite(AR9170_MAC_REG_SLOT_TIME, 9 << 10); |
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/* CF-END & CF-ACK rate => 24M OFDM */ |
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carl9170_regwrite(AR9170_MAC_REG_TID_CFACK_CFEND_RATE, 0x59900000); |
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/* NAV protects ACK only (in TXOP) */ |
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carl9170_regwrite(AR9170_MAC_REG_TXOP_DURATION, 0x201); |
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/* Set Beacon PHY CTRL's TPC to 0x7, TA1=1 */ |
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/* OTUS set AM to 0x1 */ |
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carl9170_regwrite(AR9170_MAC_REG_BCN_HT1, 0x8000170); |
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carl9170_regwrite(AR9170_MAC_REG_BACKOFF_PROTECT, 0x105); |
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/* Aggregation MAX number and timeout */ |
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carl9170_regwrite(AR9170_MAC_REG_AMPDU_FACTOR, 0x8000a); |
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carl9170_regwrite(AR9170_MAC_REG_AMPDU_DENSITY, 0x140a07); |
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carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER, |
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AR9170_MAC_FTF_DEFAULTS); |
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carl9170_regwrite(AR9170_MAC_REG_RX_CONTROL, |
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AR9170_MAC_RX_CTRL_DEAGG | |
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AR9170_MAC_RX_CTRL_SHORT_FILTER); |
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/* rate sets */ |
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carl9170_regwrite(AR9170_MAC_REG_BASIC_RATE, 0x150f); |
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carl9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, 0x150f); |
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carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_RATE, 0x0030033); |
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/* MIMO response control */ |
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carl9170_regwrite(AR9170_MAC_REG_ACK_TPC, 0x4003c1e); |
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carl9170_regwrite(AR9170_MAC_REG_AMPDU_RX_THRESH, 0xffff); |
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/* set PHY register read timeout (??) */ |
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carl9170_regwrite(AR9170_MAC_REG_MISC_680, 0xf00008); |
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/* Disable Rx TimeOut, workaround for BB. */ |
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carl9170_regwrite(AR9170_MAC_REG_RX_TIMEOUT, 0x0); |
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/* Set WLAN DMA interrupt mode: generate int per packet */ |
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carl9170_regwrite(AR9170_MAC_REG_TXRX_MPI, 0x110011); |
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carl9170_regwrite(AR9170_MAC_REG_FCS_SELECT, |
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AR9170_MAC_FCS_FIFO_PROT); |
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/* Disables the CF_END frame, undocumented register */ |
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carl9170_regwrite(AR9170_MAC_REG_TXOP_NOT_ENOUGH_IND, |
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0x141e0f48); |
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/* reset group hash table */ |
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carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, 0xffffffff); |
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carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, 0xffffffff); |
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/* disable PRETBTT interrupt */ |
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carl9170_regwrite(AR9170_MAC_REG_PRETBTT, 0x0); |
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carl9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, 0x0); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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} |
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static int carl9170_set_mac_reg(struct ar9170 *ar, |
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const u32 reg, const u8 *mac) |
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{ |
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static const u8 zero[ETH_ALEN] = { 0 }; |
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if (!mac) |
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mac = zero; |
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(reg, get_unaligned_le32(mac)); |
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carl9170_regwrite(reg + 4, get_unaligned_le16(mac + 4)); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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} |
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int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id, |
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const u8 *mac) |
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{ |
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if (WARN_ON(id >= ar->fw.vif_num)) |
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return -EINVAL; |
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return carl9170_set_mac_reg(ar, |
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AR9170_MAC_REG_ACK_TABLE + (id - 1) * 8, mac); |
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} |
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int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hash) |
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{ |
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int err; |
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, mc_hash >> 32); |
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carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, mc_hash); |
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carl9170_regwrite_finish(); |
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err = carl9170_regwrite_result(); |
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if (err) |
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return err; |
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ar->cur_mc_hash = mc_hash; |
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return 0; |
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} |
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int carl9170_set_operating_mode(struct ar9170 *ar) |
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{ |
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struct ieee80211_vif *vif; |
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struct ath_common *common = &ar->common; |
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u8 *mac_addr, *bssid; |
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u32 cam_mode = AR9170_MAC_CAM_DEFAULTS; |
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u32 enc_mode = AR9170_MAC_ENCRYPTION_DEFAULTS | |
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AR9170_MAC_ENCRYPTION_MGMT_RX_SOFTWARE; |
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u32 rx_ctrl = AR9170_MAC_RX_CTRL_DEAGG | |
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AR9170_MAC_RX_CTRL_SHORT_FILTER; |
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u32 sniffer = AR9170_MAC_SNIFFER_DEFAULTS; |
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int err = 0; |
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rcu_read_lock(); |
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vif = carl9170_get_main_vif(ar); |
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if (vif) { |
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mac_addr = common->macaddr; |
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bssid = common->curbssid; |
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switch (vif->type) { |
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case NL80211_IFTYPE_ADHOC: |
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cam_mode |= AR9170_MAC_CAM_IBSS; |
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break; |
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case NL80211_IFTYPE_MESH_POINT: |
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case NL80211_IFTYPE_AP: |
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cam_mode |= AR9170_MAC_CAM_AP; |
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/* iwlagn 802.11n STA Workaround */ |
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rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST; |
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break; |
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case NL80211_IFTYPE_STATION: |
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cam_mode |= AR9170_MAC_CAM_STA; |
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rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST; |
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break; |
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default: |
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WARN(1, "Unsupported operation mode %x\n", vif->type); |
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err = -EOPNOTSUPP; |
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break; |
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} |
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} else { |
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/* |
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* Enable monitor mode |
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* |
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* rx_ctrl |= AR9170_MAC_RX_CTRL_ACK_IN_SNIFFER; |
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* sniffer |= AR9170_MAC_SNIFFER_ENABLE_PROMISC; |
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* |
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* When the hardware is in SNIFFER_PROMISC mode, |
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* it generates spurious ACKs for every incoming |
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* frame. This confuses every peer in the |
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* vicinity and the network throughput will suffer |
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* badly. |
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* |
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* Hence, the hardware will be put into station |
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* mode and just the rx filters are disabled. |
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*/ |
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cam_mode |= AR9170_MAC_CAM_STA; |
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rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST; |
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mac_addr = common->macaddr; |
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bssid = NULL; |
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} |
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rcu_read_unlock(); |
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if (err) |
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return err; |
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if (ar->rx_software_decryption) |
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enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE; |
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if (ar->sniffer_enabled) { |
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enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE; |
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} |
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err = carl9170_set_mac_reg(ar, AR9170_MAC_REG_MAC_ADDR_L, mac_addr); |
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if (err) |
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return err; |
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err = carl9170_set_mac_reg(ar, AR9170_MAC_REG_BSSID_L, bssid); |
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if (err) |
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return err; |
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(AR9170_MAC_REG_SNIFFER, sniffer); |
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carl9170_regwrite(AR9170_MAC_REG_CAM_MODE, cam_mode); |
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carl9170_regwrite(AR9170_MAC_REG_ENCRYPTION, enc_mode); |
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carl9170_regwrite(AR9170_MAC_REG_RX_CONTROL, rx_ctrl); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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} |
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int carl9170_set_hwretry_limit(struct ar9170 *ar, const unsigned int max_retry) |
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{ |
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u32 tmp = min_t(u32, 0x33333, max_retry * 0x11111); |
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return carl9170_write_reg(ar, AR9170_MAC_REG_RETRY_MAX, tmp); |
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} |
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int carl9170_set_beacon_timers(struct ar9170 *ar) |
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{ |
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struct ieee80211_vif *vif; |
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u32 v = 0; |
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u32 pretbtt = 0; |
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rcu_read_lock(); |
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vif = carl9170_get_main_vif(ar); |
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if (vif) { |
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struct carl9170_vif_info *mvif; |
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mvif = (void *) vif->drv_priv; |
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if (mvif->enable_beacon && !WARN_ON(!ar->beacon_enabled)) { |
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ar->global_beacon_int = vif->bss_conf.beacon_int / |
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ar->beacon_enabled; |
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SET_VAL(AR9170_MAC_BCN_DTIM, v, |
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vif->bss_conf.dtim_period); |
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switch (vif->type) { |
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case NL80211_IFTYPE_MESH_POINT: |
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case NL80211_IFTYPE_ADHOC: |
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v |= AR9170_MAC_BCN_IBSS_MODE; |
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break; |
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case NL80211_IFTYPE_AP: |
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v |= AR9170_MAC_BCN_AP_MODE; |
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break; |
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default: |
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WARN_ON_ONCE(1); |
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break; |
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} |
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} else if (vif->type == NL80211_IFTYPE_STATION) { |
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ar->global_beacon_int = vif->bss_conf.beacon_int; |
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SET_VAL(AR9170_MAC_BCN_DTIM, v, |
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ar->hw->conf.ps_dtim_period); |
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v |= AR9170_MAC_BCN_STA_PS | |
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AR9170_MAC_BCN_PWR_MGT; |
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} |
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if (ar->global_beacon_int) { |
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if (ar->global_beacon_int < 15) { |
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rcu_read_unlock(); |
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return -ERANGE; |
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} |
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ar->global_pretbtt = ar->global_beacon_int - |
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CARL9170_PRETBTT_KUS; |
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} else { |
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ar->global_pretbtt = 0; |
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} |
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} else { |
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ar->global_beacon_int = 0; |
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ar->global_pretbtt = 0; |
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} |
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rcu_read_unlock(); |
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SET_VAL(AR9170_MAC_BCN_PERIOD, v, ar->global_beacon_int); |
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SET_VAL(AR9170_MAC_PRETBTT, pretbtt, ar->global_pretbtt); |
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SET_VAL(AR9170_MAC_PRETBTT2, pretbtt, ar->global_pretbtt); |
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(AR9170_MAC_REG_PRETBTT, pretbtt); |
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carl9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, v); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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} |
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int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac, |
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const u8 ktype, const u8 keyidx, const u8 *keydata, |
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const int keylen) |
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{ |
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struct carl9170_set_key_cmd key = { }; |
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static const u8 bcast[ETH_ALEN] = { |
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
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mac = mac ? : bcast; |
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key.user = cpu_to_le16(id); |
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key.keyId = cpu_to_le16(keyidx); |
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key.type = cpu_to_le16(ktype); |
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memcpy(&key.macAddr, mac, ETH_ALEN); |
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if (keydata) |
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memcpy(&key.key, keydata, keylen); |
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return carl9170_exec_cmd(ar, CARL9170_CMD_EKEY, |
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sizeof(key), (u8 *)&key, 0, NULL); |
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} |
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int carl9170_disable_key(struct ar9170 *ar, const u8 id) |
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{ |
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struct carl9170_disable_key_cmd key = { }; |
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key.user = cpu_to_le16(id); |
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return carl9170_exec_cmd(ar, CARL9170_CMD_DKEY, |
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sizeof(key), (u8 *)&key, 0, NULL); |
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} |
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int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel) |
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{ |
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unsigned int power, chains; |
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|
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if (ar->eeprom.tx_mask != 1) |
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chains = AR9170_TX_PHY_TXCHAIN_2; |
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else |
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chains = AR9170_TX_PHY_TXCHAIN_1; |
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switch (channel->band) { |
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case NL80211_BAND_2GHZ: |
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power = ar->power_2G_ofdm[0] & 0x3f; |
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break; |
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case NL80211_BAND_5GHZ: |
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power = ar->power_5G_leg[0] & 0x3f; |
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break; |
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default: |
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BUG(); |
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} |
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power = min_t(unsigned int, power, ar->hw->conf.power_level * 2); |
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|
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carl9170_regwrite_begin(ar); |
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carl9170_regwrite(AR9170_MAC_REG_ACK_TPC, |
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0x3c1e | power << 20 | chains << 26); |
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carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_TPC, |
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power << 5 | chains << 11 | |
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power << 21 | chains << 27); |
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carl9170_regwrite(AR9170_MAC_REG_CFEND_QOSNULL_TPC, |
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power << 5 | chains << 11 | |
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power << 21 | chains << 27); |
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carl9170_regwrite_finish(); |
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return carl9170_regwrite_result(); |
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}
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