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- /*
- * Atheros CARL9170 driver
- *
- * MAC programming
- *
- * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; see the file COPYING. If not, see
- * http://www.gnu.org/licenses/.
- *
- * This file incorporates work covered by the following copyright and
- * permission notice:
- * Copyright (c) 2007-2008 Atheros Communications, Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
- #include <asm/unaligned.h>
- #include "carl9170.h"
- #include "cmd.h"
- int carl9170_set_dyn_sifs_ack(struct ar9170 *ar)
- {
- u32 val;
- if (conf_is_ht40(&ar->hw->conf))
- val = 0x010a;
- else {
- if (ar->hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ)
- val = 0x105;
- else
- val = 0x104;
- }
- return carl9170_write_reg(ar, AR9170_MAC_REG_DYNAMIC_SIFS_ACK, val);
- }
- int carl9170_set_rts_cts_rate(struct ar9170 *ar)
- {
- u32 rts_rate, cts_rate;
- if (conf_is_ht(&ar->hw->conf)) {
- /* 12 mbit OFDM */
- rts_rate = 0x1da;
- cts_rate = 0x10a;
- } else {
- if (ar->hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ) {
- /* 11 mbit CCK */
- rts_rate = 033;
- cts_rate = 003;
- } else {
- /* 6 mbit OFDM */
- rts_rate = 0x1bb;
- cts_rate = 0x10b;
- }
- }
- return carl9170_write_reg(ar, AR9170_MAC_REG_RTS_CTS_RATE,
- rts_rate | (cts_rate) << 16);
- }
- int carl9170_set_slot_time(struct ar9170 *ar)
- {
- struct ieee80211_vif *vif;
- u32 slottime = 20;
- rcu_read_lock();
- vif = carl9170_get_main_vif(ar);
- if (!vif) {
- rcu_read_unlock();
- return 0;
- }
- if ((ar->hw->conf.chandef.chan->band == IEEE80211_BAND_5GHZ) ||
- vif->bss_conf.use_short_slot)
- slottime = 9;
- rcu_read_unlock();
- return carl9170_write_reg(ar, AR9170_MAC_REG_SLOT_TIME,
- slottime << 10);
- }
- int carl9170_set_mac_rates(struct ar9170 *ar)
- {
- struct ieee80211_vif *vif;
- u32 basic, mandatory;
- rcu_read_lock();
- vif = carl9170_get_main_vif(ar);
- if (!vif) {
- rcu_read_unlock();
- return 0;
- }
- basic = (vif->bss_conf.basic_rates & 0xf);
- basic |= (vif->bss_conf.basic_rates & 0xff0) << 4;
- rcu_read_unlock();
- if (ar->hw->conf.chandef.chan->band == IEEE80211_BAND_5GHZ)
- mandatory = 0xff00; /* OFDM 6/9/12/18/24/36/48/54 */
- else
- mandatory = 0xff0f; /* OFDM (6/9../54) + CCK (1/2/5.5/11) */
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(AR9170_MAC_REG_BASIC_RATE, basic);
- carl9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, mandatory);
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
- int carl9170_set_qos(struct ar9170 *ar)
- {
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(AR9170_MAC_REG_AC0_CW, ar->edcf[0].cw_min |
- (ar->edcf[0].cw_max << 16));
- carl9170_regwrite(AR9170_MAC_REG_AC1_CW, ar->edcf[1].cw_min |
- (ar->edcf[1].cw_max << 16));
- carl9170_regwrite(AR9170_MAC_REG_AC2_CW, ar->edcf[2].cw_min |
- (ar->edcf[2].cw_max << 16));
- carl9170_regwrite(AR9170_MAC_REG_AC3_CW, ar->edcf[3].cw_min |
- (ar->edcf[3].cw_max << 16));
- carl9170_regwrite(AR9170_MAC_REG_AC4_CW, ar->edcf[4].cw_min |
- (ar->edcf[4].cw_max << 16));
- carl9170_regwrite(AR9170_MAC_REG_AC2_AC1_AC0_AIFS,
- ((ar->edcf[0].aifs * 9 + 10)) |
- ((ar->edcf[1].aifs * 9 + 10) << 12) |
- ((ar->edcf[2].aifs * 9 + 10) << 24));
- carl9170_regwrite(AR9170_MAC_REG_AC4_AC3_AC2_AIFS,
- ((ar->edcf[2].aifs * 9 + 10) >> 8) |
- ((ar->edcf[3].aifs * 9 + 10) << 4) |
- ((ar->edcf[4].aifs * 9 + 10) << 16));
- carl9170_regwrite(AR9170_MAC_REG_AC1_AC0_TXOP,
- ar->edcf[0].txop | ar->edcf[1].txop << 16);
- carl9170_regwrite(AR9170_MAC_REG_AC3_AC2_TXOP,
- ar->edcf[2].txop | ar->edcf[3].txop << 16 |
- ar->edcf[4].txop << 24);
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
- int carl9170_init_mac(struct ar9170 *ar)
- {
- carl9170_regwrite_begin(ar);
- /* switch MAC to OTUS interface */
- carl9170_regwrite(0x1c3600, 0x3);
- carl9170_regwrite(AR9170_MAC_REG_ACK_EXTENSION, 0x40);
- carl9170_regwrite(AR9170_MAC_REG_RETRY_MAX, 0x0);
- carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER,
- AR9170_MAC_FTF_MONITOR);
- /* enable MMIC */
- carl9170_regwrite(AR9170_MAC_REG_SNIFFER,
- AR9170_MAC_SNIFFER_DEFAULTS);
- carl9170_regwrite(AR9170_MAC_REG_RX_THRESHOLD, 0xc1f80);
- carl9170_regwrite(AR9170_MAC_REG_RX_PE_DELAY, 0x70);
- carl9170_regwrite(AR9170_MAC_REG_EIFS_AND_SIFS, 0xa144000);
- carl9170_regwrite(AR9170_MAC_REG_SLOT_TIME, 9 << 10);
- /* CF-END & CF-ACK rate => 24M OFDM */
- carl9170_regwrite(AR9170_MAC_REG_TID_CFACK_CFEND_RATE, 0x59900000);
- /* NAV protects ACK only (in TXOP) */
- carl9170_regwrite(AR9170_MAC_REG_TXOP_DURATION, 0x201);
- /* Set Beacon PHY CTRL's TPC to 0x7, TA1=1 */
- /* OTUS set AM to 0x1 */
- carl9170_regwrite(AR9170_MAC_REG_BCN_HT1, 0x8000170);
- carl9170_regwrite(AR9170_MAC_REG_BACKOFF_PROTECT, 0x105);
- /* Aggregation MAX number and timeout */
- carl9170_regwrite(AR9170_MAC_REG_AMPDU_FACTOR, 0x8000a);
- carl9170_regwrite(AR9170_MAC_REG_AMPDU_DENSITY, 0x140a07);
- carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER,
- AR9170_MAC_FTF_DEFAULTS);
- carl9170_regwrite(AR9170_MAC_REG_RX_CONTROL,
- AR9170_MAC_RX_CTRL_DEAGG |
- AR9170_MAC_RX_CTRL_SHORT_FILTER);
- /* rate sets */
- carl9170_regwrite(AR9170_MAC_REG_BASIC_RATE, 0x150f);
- carl9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, 0x150f);
- carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_RATE, 0x0030033);
- /* MIMO response control */
- carl9170_regwrite(AR9170_MAC_REG_ACK_TPC, 0x4003c1e);
- carl9170_regwrite(AR9170_MAC_REG_AMPDU_RX_THRESH, 0xffff);
- /* set PHY register read timeout (??) */
- carl9170_regwrite(AR9170_MAC_REG_MISC_680, 0xf00008);
- /* Disable Rx TimeOut, workaround for BB. */
- carl9170_regwrite(AR9170_MAC_REG_RX_TIMEOUT, 0x0);
- /* Set WLAN DMA interrupt mode: generate int per packet */
- carl9170_regwrite(AR9170_MAC_REG_TXRX_MPI, 0x110011);
- carl9170_regwrite(AR9170_MAC_REG_FCS_SELECT,
- AR9170_MAC_FCS_FIFO_PROT);
- /* Disables the CF_END frame, undocumented register */
- carl9170_regwrite(AR9170_MAC_REG_TXOP_NOT_ENOUGH_IND,
- 0x141e0f48);
- /* reset group hash table */
- carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, 0xffffffff);
- carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, 0xffffffff);
- /* disable PRETBTT interrupt */
- carl9170_regwrite(AR9170_MAC_REG_PRETBTT, 0x0);
- carl9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, 0x0);
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
- static int carl9170_set_mac_reg(struct ar9170 *ar,
- const u32 reg, const u8 *mac)
- {
- static const u8 zero[ETH_ALEN] = { 0 };
- if (!mac)
- mac = zero;
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(reg, get_unaligned_le32(mac));
- carl9170_regwrite(reg + 4, get_unaligned_le16(mac + 4));
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
- int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
- const u8 *mac)
- {
- if (WARN_ON(id >= ar->fw.vif_num))
- return -EINVAL;
- return carl9170_set_mac_reg(ar,
- AR9170_MAC_REG_ACK_TABLE + (id - 1) * 8, mac);
- }
- int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hash)
- {
- int err;
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, mc_hash >> 32);
- carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, mc_hash);
- carl9170_regwrite_finish();
- err = carl9170_regwrite_result();
- if (err)
- return err;
- ar->cur_mc_hash = mc_hash;
- return 0;
- }
- int carl9170_set_operating_mode(struct ar9170 *ar)
- {
- struct ieee80211_vif *vif;
- struct ath_common *common = &ar->common;
- u8 *mac_addr, *bssid;
- u32 cam_mode = AR9170_MAC_CAM_DEFAULTS;
- u32 enc_mode = AR9170_MAC_ENCRYPTION_DEFAULTS |
- AR9170_MAC_ENCRYPTION_MGMT_RX_SOFTWARE;
- u32 rx_ctrl = AR9170_MAC_RX_CTRL_DEAGG |
- AR9170_MAC_RX_CTRL_SHORT_FILTER;
- u32 sniffer = AR9170_MAC_SNIFFER_DEFAULTS;
- int err = 0;
- rcu_read_lock();
- vif = carl9170_get_main_vif(ar);
- if (vif) {
- mac_addr = common->macaddr;
- bssid = common->curbssid;
- switch (vif->type) {
- case NL80211_IFTYPE_ADHOC:
- cam_mode |= AR9170_MAC_CAM_IBSS;
- break;
- case NL80211_IFTYPE_MESH_POINT:
- case NL80211_IFTYPE_AP:
- cam_mode |= AR9170_MAC_CAM_AP;
- /* iwlagn 802.11n STA Workaround */
- rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;
- break;
- case NL80211_IFTYPE_WDS:
- cam_mode |= AR9170_MAC_CAM_AP_WDS;
- rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;
- break;
- case NL80211_IFTYPE_STATION:
- cam_mode |= AR9170_MAC_CAM_STA;
- rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;
- break;
- default:
- WARN(1, "Unsupported operation mode %x\n", vif->type);
- err = -EOPNOTSUPP;
- break;
- }
- } else {
- /*
- * Enable monitor mode
- *
- * rx_ctrl |= AR9170_MAC_RX_CTRL_ACK_IN_SNIFFER;
- * sniffer |= AR9170_MAC_SNIFFER_ENABLE_PROMISC;
- *
- * When the hardware is in SNIFFER_PROMISC mode,
- * it generates spurious ACKs for every incoming
- * frame. This confuses every peer in the
- * vicinity and the network throughput will suffer
- * badly.
- *
- * Hence, the hardware will be put into station
- * mode and just the rx filters are disabled.
- */
- cam_mode |= AR9170_MAC_CAM_STA;
- rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;
- mac_addr = common->macaddr;
- bssid = NULL;
- }
- rcu_read_unlock();
- if (err)
- return err;
- if (ar->rx_software_decryption)
- enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE;
- if (ar->sniffer_enabled) {
- enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE;
- }
- err = carl9170_set_mac_reg(ar, AR9170_MAC_REG_MAC_ADDR_L, mac_addr);
- if (err)
- return err;
- err = carl9170_set_mac_reg(ar, AR9170_MAC_REG_BSSID_L, bssid);
- if (err)
- return err;
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(AR9170_MAC_REG_SNIFFER, sniffer);
- carl9170_regwrite(AR9170_MAC_REG_CAM_MODE, cam_mode);
- carl9170_regwrite(AR9170_MAC_REG_ENCRYPTION, enc_mode);
- carl9170_regwrite(AR9170_MAC_REG_RX_CONTROL, rx_ctrl);
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
- int carl9170_set_hwretry_limit(struct ar9170 *ar, const unsigned int max_retry)
- {
- u32 tmp = min_t(u32, 0x33333, max_retry * 0x11111);
- return carl9170_write_reg(ar, AR9170_MAC_REG_RETRY_MAX, tmp);
- }
- int carl9170_set_beacon_timers(struct ar9170 *ar)
- {
- struct ieee80211_vif *vif;
- u32 v = 0;
- u32 pretbtt = 0;
- rcu_read_lock();
- vif = carl9170_get_main_vif(ar);
- if (vif) {
- struct carl9170_vif_info *mvif;
- mvif = (void *) vif->drv_priv;
- if (mvif->enable_beacon && !WARN_ON(!ar->beacon_enabled)) {
- ar->global_beacon_int = vif->bss_conf.beacon_int /
- ar->beacon_enabled;
- SET_VAL(AR9170_MAC_BCN_DTIM, v,
- vif->bss_conf.dtim_period);
- switch (vif->type) {
- case NL80211_IFTYPE_MESH_POINT:
- case NL80211_IFTYPE_ADHOC:
- v |= AR9170_MAC_BCN_IBSS_MODE;
- break;
- case NL80211_IFTYPE_AP:
- v |= AR9170_MAC_BCN_AP_MODE;
- break;
- default:
- WARN_ON_ONCE(1);
- break;
- }
- } else if (vif->type == NL80211_IFTYPE_STATION) {
- ar->global_beacon_int = vif->bss_conf.beacon_int;
- SET_VAL(AR9170_MAC_BCN_DTIM, v,
- ar->hw->conf.ps_dtim_period);
- v |= AR9170_MAC_BCN_STA_PS |
- AR9170_MAC_BCN_PWR_MGT;
- }
- if (ar->global_beacon_int) {
- if (ar->global_beacon_int < 15) {
- rcu_read_unlock();
- return -ERANGE;
- }
- ar->global_pretbtt = ar->global_beacon_int -
- CARL9170_PRETBTT_KUS;
- } else {
- ar->global_pretbtt = 0;
- }
- } else {
- ar->global_beacon_int = 0;
- ar->global_pretbtt = 0;
- }
- rcu_read_unlock();
- SET_VAL(AR9170_MAC_BCN_PERIOD, v, ar->global_beacon_int);
- SET_VAL(AR9170_MAC_PRETBTT, pretbtt, ar->global_pretbtt);
- SET_VAL(AR9170_MAC_PRETBTT2, pretbtt, ar->global_pretbtt);
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(AR9170_MAC_REG_PRETBTT, pretbtt);
- carl9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, v);
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
- int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac,
- const u8 ktype, const u8 keyidx, const u8 *keydata,
- const int keylen)
- {
- struct carl9170_set_key_cmd key = { };
- static const u8 bcast[ETH_ALEN] = {
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
- mac = mac ? : bcast;
- key.user = cpu_to_le16(id);
- key.keyId = cpu_to_le16(keyidx);
- key.type = cpu_to_le16(ktype);
- memcpy(&key.macAddr, mac, ETH_ALEN);
- if (keydata)
- memcpy(&key.key, keydata, keylen);
- return carl9170_exec_cmd(ar, CARL9170_CMD_EKEY,
- sizeof(key), (u8 *)&key, 0, NULL);
- }
- int carl9170_disable_key(struct ar9170 *ar, const u8 id)
- {
- struct carl9170_disable_key_cmd key = { };
- key.user = cpu_to_le16(id);
- return carl9170_exec_cmd(ar, CARL9170_CMD_DKEY,
- sizeof(key), (u8 *)&key, 0, NULL);
- }
- int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel)
- {
- unsigned int power, chains;
- if (ar->eeprom.tx_mask != 1)
- chains = AR9170_TX_PHY_TXCHAIN_2;
- else
- chains = AR9170_TX_PHY_TXCHAIN_1;
- switch (channel->band) {
- case IEEE80211_BAND_2GHZ:
- power = ar->power_2G_ofdm[0] & 0x3f;
- break;
- case IEEE80211_BAND_5GHZ:
- power = ar->power_5G_leg[0] & 0x3f;
- break;
- default:
- BUG_ON(1);
- }
- power = min_t(unsigned int, power, ar->hw->conf.power_level * 2);
- carl9170_regwrite_begin(ar);
- carl9170_regwrite(AR9170_MAC_REG_ACK_TPC,
- 0x3c1e | power << 20 | chains << 26);
- carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_TPC,
- power << 5 | chains << 11 |
- power << 21 | chains << 27);
- carl9170_regwrite(AR9170_MAC_REG_CFEND_QOSNULL_TPC,
- power << 5 | chains << 11 |
- power << 21 | chains << 27);
- carl9170_regwrite_finish();
- return carl9170_regwrite_result();
- }
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