535 lines · c
1/*2 * Atheros CARL9170 driver3 *4 * MAC programming5 *6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>7 *8 * This program is free software; you can redistribute it and/or modify9 * it under the terms of the GNU General Public License as published by10 * the Free Software Foundation; either version 2 of the License, or11 * (at your option) any later version.12 *13 * This program is distributed in the hope that it will be useful,14 * but WITHOUT ANY WARRANTY; without even the implied warranty of15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the16 * GNU General Public License for more details.17 *18 * You should have received a copy of the GNU General Public License19 * along with this program; see the file COPYING. If not, see20 * http://www.gnu.org/licenses/.21 *22 * This file incorporates work covered by the following copyright and23 * permission notice:24 * Copyright (c) 2007-2008 Atheros Communications, Inc.25 *26 * Permission to use, copy, modify, and/or distribute this software for any27 * purpose with or without fee is hereby granted, provided that the above28 * copyright notice and this permission notice appear in all copies.29 *30 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES31 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF32 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR33 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES34 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN35 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF36 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.37 */38 39#include <linux/unaligned.h>40 41#include "carl9170.h"42#include "cmd.h"43 44int carl9170_set_dyn_sifs_ack(struct ar9170 *ar)45{46 u32 val;47 48 if (conf_is_ht40(&ar->hw->conf))49 val = 0x010a;50 else {51 if (ar->hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)52 val = 0x105;53 else54 val = 0x104;55 }56 57 return carl9170_write_reg(ar, AR9170_MAC_REG_DYNAMIC_SIFS_ACK, val);58}59 60int carl9170_set_rts_cts_rate(struct ar9170 *ar)61{62 u32 rts_rate, cts_rate;63 64 if (conf_is_ht(&ar->hw->conf)) {65 /* 12 mbit OFDM */66 rts_rate = 0x1da;67 cts_rate = 0x10a;68 } else {69 if (ar->hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {70 /* 11 mbit CCK */71 rts_rate = 033;72 cts_rate = 003;73 } else {74 /* 6 mbit OFDM */75 rts_rate = 0x1bb;76 cts_rate = 0x10b;77 }78 }79 80 return carl9170_write_reg(ar, AR9170_MAC_REG_RTS_CTS_RATE,81 rts_rate | (cts_rate) << 16);82}83 84int carl9170_set_slot_time(struct ar9170 *ar)85{86 struct ieee80211_vif *vif;87 u32 slottime = 20;88 89 rcu_read_lock();90 vif = carl9170_get_main_vif(ar);91 if (!vif) {92 rcu_read_unlock();93 return 0;94 }95 96 if ((ar->hw->conf.chandef.chan->band == NL80211_BAND_5GHZ) ||97 vif->bss_conf.use_short_slot)98 slottime = 9;99 100 rcu_read_unlock();101 102 return carl9170_write_reg(ar, AR9170_MAC_REG_SLOT_TIME,103 slottime << 10);104}105 106int carl9170_set_mac_rates(struct ar9170 *ar)107{108 struct ieee80211_vif *vif;109 u32 basic, mandatory;110 111 rcu_read_lock();112 vif = carl9170_get_main_vif(ar);113 114 if (!vif) {115 rcu_read_unlock();116 return 0;117 }118 119 basic = (vif->bss_conf.basic_rates & 0xf);120 basic |= (vif->bss_conf.basic_rates & 0xff0) << 4;121 rcu_read_unlock();122 123 if (ar->hw->conf.chandef.chan->band == NL80211_BAND_5GHZ)124 mandatory = 0xff00; /* OFDM 6/9/12/18/24/36/48/54 */125 else126 mandatory = 0xff0f; /* OFDM (6/9../54) + CCK (1/2/5.5/11) */127 128 carl9170_regwrite_begin(ar);129 carl9170_regwrite(AR9170_MAC_REG_BASIC_RATE, basic);130 carl9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, mandatory);131 carl9170_regwrite_finish();132 133 return carl9170_regwrite_result();134}135 136int carl9170_set_qos(struct ar9170 *ar)137{138 carl9170_regwrite_begin(ar);139 140 carl9170_regwrite(AR9170_MAC_REG_AC0_CW, ar->edcf[0].cw_min |141 (ar->edcf[0].cw_max << 16));142 carl9170_regwrite(AR9170_MAC_REG_AC1_CW, ar->edcf[1].cw_min |143 (ar->edcf[1].cw_max << 16));144 carl9170_regwrite(AR9170_MAC_REG_AC2_CW, ar->edcf[2].cw_min |145 (ar->edcf[2].cw_max << 16));146 carl9170_regwrite(AR9170_MAC_REG_AC3_CW, ar->edcf[3].cw_min |147 (ar->edcf[3].cw_max << 16));148 carl9170_regwrite(AR9170_MAC_REG_AC4_CW, ar->edcf[4].cw_min |149 (ar->edcf[4].cw_max << 16));150 151 carl9170_regwrite(AR9170_MAC_REG_AC2_AC1_AC0_AIFS,152 ((ar->edcf[0].aifs * 9 + 10)) |153 ((ar->edcf[1].aifs * 9 + 10) << 12) |154 ((ar->edcf[2].aifs * 9 + 10) << 24));155 carl9170_regwrite(AR9170_MAC_REG_AC4_AC3_AC2_AIFS,156 ((ar->edcf[2].aifs * 9 + 10) >> 8) |157 ((ar->edcf[3].aifs * 9 + 10) << 4) |158 ((ar->edcf[4].aifs * 9 + 10) << 16));159 160 carl9170_regwrite(AR9170_MAC_REG_AC1_AC0_TXOP,161 ar->edcf[0].txop | ar->edcf[1].txop << 16);162 carl9170_regwrite(AR9170_MAC_REG_AC3_AC2_TXOP,163 ar->edcf[2].txop | ar->edcf[3].txop << 16 |164 ar->edcf[4].txop << 24);165 166 carl9170_regwrite_finish();167 168 return carl9170_regwrite_result();169}170 171int carl9170_init_mac(struct ar9170 *ar)172{173 carl9170_regwrite_begin(ar);174 175 /* switch MAC to OTUS interface */176 carl9170_regwrite(0x1c3600, 0x3);177 178 carl9170_regwrite(AR9170_MAC_REG_ACK_EXTENSION, 0x40);179 180 carl9170_regwrite(AR9170_MAC_REG_RETRY_MAX, 0x0);181 182 carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER,183 AR9170_MAC_FTF_MONITOR);184 185 /* enable MMIC */186 carl9170_regwrite(AR9170_MAC_REG_SNIFFER,187 AR9170_MAC_SNIFFER_DEFAULTS);188 189 carl9170_regwrite(AR9170_MAC_REG_RX_THRESHOLD, 0xc1f80);190 191 carl9170_regwrite(AR9170_MAC_REG_RX_PE_DELAY, 0x70);192 carl9170_regwrite(AR9170_MAC_REG_EIFS_AND_SIFS, 0xa144000);193 carl9170_regwrite(AR9170_MAC_REG_SLOT_TIME, 9 << 10);194 195 /* CF-END & CF-ACK rate => 24M OFDM */196 carl9170_regwrite(AR9170_MAC_REG_TID_CFACK_CFEND_RATE, 0x59900000);197 198 /* NAV protects ACK only (in TXOP) */199 carl9170_regwrite(AR9170_MAC_REG_TXOP_DURATION, 0x201);200 201 /* Set Beacon PHY CTRL's TPC to 0x7, TA1=1 */202 /* OTUS set AM to 0x1 */203 carl9170_regwrite(AR9170_MAC_REG_BCN_HT1, 0x8000170);204 205 carl9170_regwrite(AR9170_MAC_REG_BACKOFF_PROTECT, 0x105);206 207 /* Aggregation MAX number and timeout */208 carl9170_regwrite(AR9170_MAC_REG_AMPDU_FACTOR, 0x8000a);209 carl9170_regwrite(AR9170_MAC_REG_AMPDU_DENSITY, 0x140a07);210 211 carl9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER,212 AR9170_MAC_FTF_DEFAULTS);213 214 carl9170_regwrite(AR9170_MAC_REG_RX_CONTROL,215 AR9170_MAC_RX_CTRL_DEAGG |216 AR9170_MAC_RX_CTRL_SHORT_FILTER);217 218 /* rate sets */219 carl9170_regwrite(AR9170_MAC_REG_BASIC_RATE, 0x150f);220 carl9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, 0x150f);221 carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_RATE, 0x0030033);222 223 /* MIMO response control */224 carl9170_regwrite(AR9170_MAC_REG_ACK_TPC, 0x4003c1e);225 226 carl9170_regwrite(AR9170_MAC_REG_AMPDU_RX_THRESH, 0xffff);227 228 /* set PHY register read timeout (??) */229 carl9170_regwrite(AR9170_MAC_REG_MISC_680, 0xf00008);230 231 /* Disable Rx TimeOut, workaround for BB. */232 carl9170_regwrite(AR9170_MAC_REG_RX_TIMEOUT, 0x0);233 234 /* Set WLAN DMA interrupt mode: generate int per packet */235 carl9170_regwrite(AR9170_MAC_REG_TXRX_MPI, 0x110011);236 237 carl9170_regwrite(AR9170_MAC_REG_FCS_SELECT,238 AR9170_MAC_FCS_FIFO_PROT);239 240 /* Disables the CF_END frame, undocumented register */241 carl9170_regwrite(AR9170_MAC_REG_TXOP_NOT_ENOUGH_IND,242 0x141e0f48);243 244 /* reset group hash table */245 carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, 0xffffffff);246 carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, 0xffffffff);247 248 /* disable PRETBTT interrupt */249 carl9170_regwrite(AR9170_MAC_REG_PRETBTT, 0x0);250 carl9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, 0x0);251 252 carl9170_regwrite_finish();253 254 return carl9170_regwrite_result();255}256 257static int carl9170_set_mac_reg(struct ar9170 *ar,258 const u32 reg, const u8 *mac)259{260 static const u8 zero[ETH_ALEN] = { 0 };261 262 if (!mac)263 mac = zero;264 265 carl9170_regwrite_begin(ar);266 267 carl9170_regwrite(reg, get_unaligned_le32(mac));268 carl9170_regwrite(reg + 4, get_unaligned_le16(mac + 4));269 270 carl9170_regwrite_finish();271 272 return carl9170_regwrite_result();273}274 275int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,276 const u8 *mac)277{278 if (WARN_ON(id >= ar->fw.vif_num))279 return -EINVAL;280 281 return carl9170_set_mac_reg(ar,282 AR9170_MAC_REG_ACK_TABLE + (id - 1) * 8, mac);283}284 285int carl9170_update_multicast(struct ar9170 *ar, const u64 mc_hash)286{287 int err;288 289 carl9170_regwrite_begin(ar);290 carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, mc_hash >> 32);291 carl9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, mc_hash);292 carl9170_regwrite_finish();293 err = carl9170_regwrite_result();294 if (err)295 return err;296 297 ar->cur_mc_hash = mc_hash;298 return 0;299}300 301int carl9170_set_operating_mode(struct ar9170 *ar)302{303 struct ieee80211_vif *vif;304 struct ath_common *common = &ar->common;305 u8 *mac_addr, *bssid;306 u32 cam_mode = AR9170_MAC_CAM_DEFAULTS;307 u32 enc_mode = AR9170_MAC_ENCRYPTION_DEFAULTS |308 AR9170_MAC_ENCRYPTION_MGMT_RX_SOFTWARE;309 u32 rx_ctrl = AR9170_MAC_RX_CTRL_DEAGG |310 AR9170_MAC_RX_CTRL_SHORT_FILTER;311 u32 sniffer = AR9170_MAC_SNIFFER_DEFAULTS;312 int err = 0;313 314 rcu_read_lock();315 vif = carl9170_get_main_vif(ar);316 317 if (vif) {318 mac_addr = common->macaddr;319 bssid = common->curbssid;320 321 switch (vif->type) {322 case NL80211_IFTYPE_ADHOC:323 cam_mode |= AR9170_MAC_CAM_IBSS;324 break;325 case NL80211_IFTYPE_MESH_POINT:326 case NL80211_IFTYPE_AP:327 cam_mode |= AR9170_MAC_CAM_AP;328 329 /* iwlagn 802.11n STA Workaround */330 rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;331 break;332 case NL80211_IFTYPE_STATION:333 cam_mode |= AR9170_MAC_CAM_STA;334 rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;335 break;336 default:337 WARN(1, "Unsupported operation mode %x\n", vif->type);338 err = -EOPNOTSUPP;339 break;340 }341 } else {342 /*343 * Enable monitor mode344 *345 * rx_ctrl |= AR9170_MAC_RX_CTRL_ACK_IN_SNIFFER;346 * sniffer |= AR9170_MAC_SNIFFER_ENABLE_PROMISC;347 *348 * When the hardware is in SNIFFER_PROMISC mode,349 * it generates spurious ACKs for every incoming350 * frame. This confuses every peer in the351 * vicinity and the network throughput will suffer352 * badly.353 *354 * Hence, the hardware will be put into station355 * mode and just the rx filters are disabled.356 */357 cam_mode |= AR9170_MAC_CAM_STA;358 rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;359 mac_addr = common->macaddr;360 bssid = NULL;361 }362 rcu_read_unlock();363 364 if (err)365 return err;366 367 if (ar->rx_software_decryption)368 enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE;369 370 if (ar->sniffer_enabled) {371 enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE;372 }373 374 err = carl9170_set_mac_reg(ar, AR9170_MAC_REG_MAC_ADDR_L, mac_addr);375 if (err)376 return err;377 378 err = carl9170_set_mac_reg(ar, AR9170_MAC_REG_BSSID_L, bssid);379 if (err)380 return err;381 382 carl9170_regwrite_begin(ar);383 carl9170_regwrite(AR9170_MAC_REG_SNIFFER, sniffer);384 carl9170_regwrite(AR9170_MAC_REG_CAM_MODE, cam_mode);385 carl9170_regwrite(AR9170_MAC_REG_ENCRYPTION, enc_mode);386 carl9170_regwrite(AR9170_MAC_REG_RX_CONTROL, rx_ctrl);387 carl9170_regwrite_finish();388 389 return carl9170_regwrite_result();390}391 392int carl9170_set_hwretry_limit(struct ar9170 *ar, const unsigned int max_retry)393{394 u32 tmp = min_t(u32, 0x33333, max_retry * 0x11111);395 396 return carl9170_write_reg(ar, AR9170_MAC_REG_RETRY_MAX, tmp);397}398 399int carl9170_set_beacon_timers(struct ar9170 *ar)400{401 struct ieee80211_vif *vif;402 u32 v = 0;403 u32 pretbtt = 0;404 405 rcu_read_lock();406 vif = carl9170_get_main_vif(ar);407 408 if (vif) {409 struct carl9170_vif_info *mvif;410 mvif = (void *) vif->drv_priv;411 412 if (mvif->enable_beacon && !WARN_ON(!ar->beacon_enabled)) {413 ar->global_beacon_int = vif->bss_conf.beacon_int /414 ar->beacon_enabled;415 416 SET_VAL(AR9170_MAC_BCN_DTIM, v,417 vif->bss_conf.dtim_period);418 419 switch (vif->type) {420 case NL80211_IFTYPE_MESH_POINT:421 case NL80211_IFTYPE_ADHOC:422 v |= AR9170_MAC_BCN_IBSS_MODE;423 break;424 case NL80211_IFTYPE_AP:425 v |= AR9170_MAC_BCN_AP_MODE;426 break;427 default:428 WARN_ON_ONCE(1);429 break;430 }431 } else if (vif->type == NL80211_IFTYPE_STATION) {432 ar->global_beacon_int = vif->bss_conf.beacon_int;433 434 SET_VAL(AR9170_MAC_BCN_DTIM, v,435 ar->hw->conf.ps_dtim_period);436 437 v |= AR9170_MAC_BCN_STA_PS |438 AR9170_MAC_BCN_PWR_MGT;439 }440 441 if (ar->global_beacon_int) {442 if (ar->global_beacon_int < 15) {443 rcu_read_unlock();444 return -ERANGE;445 }446 447 ar->global_pretbtt = ar->global_beacon_int -448 CARL9170_PRETBTT_KUS;449 } else {450 ar->global_pretbtt = 0;451 }452 } else {453 ar->global_beacon_int = 0;454 ar->global_pretbtt = 0;455 }456 457 rcu_read_unlock();458 459 SET_VAL(AR9170_MAC_BCN_PERIOD, v, ar->global_beacon_int);460 SET_VAL(AR9170_MAC_PRETBTT, pretbtt, ar->global_pretbtt);461 SET_VAL(AR9170_MAC_PRETBTT2, pretbtt, ar->global_pretbtt);462 463 carl9170_regwrite_begin(ar);464 carl9170_regwrite(AR9170_MAC_REG_PRETBTT, pretbtt);465 carl9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, v);466 carl9170_regwrite_finish();467 return carl9170_regwrite_result();468}469 470int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac,471 const u8 ktype, const u8 keyidx, const u8 *keydata,472 const int keylen)473{474 struct carl9170_set_key_cmd key = { };475 static const u8 bcast[ETH_ALEN] = {476 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };477 478 mac = mac ? : bcast;479 480 key.user = cpu_to_le16(id);481 key.keyId = cpu_to_le16(keyidx);482 key.type = cpu_to_le16(ktype);483 memcpy(&key.macAddr, mac, ETH_ALEN);484 if (keydata)485 memcpy(&key.key, keydata, keylen);486 487 return carl9170_exec_cmd(ar, CARL9170_CMD_EKEY,488 sizeof(key), (u8 *)&key, 0, NULL);489}490 491int carl9170_disable_key(struct ar9170 *ar, const u8 id)492{493 struct carl9170_disable_key_cmd key = { };494 495 key.user = cpu_to_le16(id);496 497 return carl9170_exec_cmd(ar, CARL9170_CMD_DKEY,498 sizeof(key), (u8 *)&key, 0, NULL);499}500 501int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel)502{503 unsigned int power, chains;504 505 if (ar->eeprom.tx_mask != 1)506 chains = AR9170_TX_PHY_TXCHAIN_2;507 else508 chains = AR9170_TX_PHY_TXCHAIN_1;509 510 switch (channel->band) {511 case NL80211_BAND_2GHZ:512 power = ar->power_2G_ofdm[0] & 0x3f;513 break;514 case NL80211_BAND_5GHZ:515 power = ar->power_5G_leg[0] & 0x3f;516 break;517 default:518 BUG();519 }520 521 power = min_t(unsigned int, power, ar->hw->conf.power_level * 2);522 523 carl9170_regwrite_begin(ar);524 carl9170_regwrite(AR9170_MAC_REG_ACK_TPC,525 0x3c1e | power << 20 | chains << 26);526 carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_TPC,527 power << 5 | chains << 11 |528 power << 21 | chains << 27);529 carl9170_regwrite(AR9170_MAC_REG_CFEND_QOSNULL_TPC,530 power << 5 | chains << 11 |531 power << 21 | chains << 27);532 carl9170_regwrite_finish();533 return carl9170_regwrite_result();534}535