- 根目录:
- drivers
- net
- wireless
- ath
- carl9170
- mac.c
/*
* 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.channel->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.channel->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.channel->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.channel->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;
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_MESH_POINT:
case NL80211_IFTYPE_ADHOC:
cam_mode |= AR9170_MAC_CAM_IBSS;
break;
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 {
mac_addr = NULL;
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) {
rx_ctrl |= AR9170_MAC_RX_CTRL_ACK_IN_SNIFFER;
sniffer |= AR9170_MAC_SNIFFER_ENABLE_PROMISC;
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_update_beacon(struct ar9170 *ar, const bool submit)
{
struct sk_buff *skb = NULL;
struct carl9170_vif_info *cvif;
struct ieee80211_tx_info *txinfo;
__le32 *data, *old = NULL;
u32 word, off, addr, len;
int i = 0, err = 0;
rcu_read_lock();
cvif = rcu_dereference(ar->beacon_iter);
retry:
if (ar->vifs == 0 || !cvif)
goto out_unlock;
list_for_each_entry_continue_rcu(cvif, &ar->vif_list, list) {
if (cvif->active && cvif->enable_beacon)
goto found;
}
if (!ar->beacon_enabled || i++)
goto out_unlock;
goto retry;
found:
rcu_assign_pointer(ar->beacon_iter, cvif);
skb = ieee80211_beacon_get_tim(ar->hw, carl9170_get_vif(cvif),
NULL, NULL);
if (!skb) {
err = -ENOMEM;
goto err_free;
}
txinfo = IEEE80211_SKB_CB(skb);
if (txinfo->control.rates[0].flags & IEEE80211_TX_RC_MCS) {
err = -EINVAL;
goto err_free;
}
spin_lock_bh(&ar->beacon_lock);
data = (__le32 *)skb->data;
if (cvif->beacon)
old = (__le32 *)cvif->beacon->data;
off = cvif->id * AR9170_MAC_BCN_LENGTH_MAX;
addr = ar->fw.beacon_addr + off;
len = roundup(skb->len + FCS_LEN, 4);
if ((off + len) > ar->fw.beacon_max_len) {
if (net_ratelimit()) {
wiphy_err(ar->hw->wiphy, "beacon does not "
"fit into device memory!\n");
}
err = -EINVAL;
goto err_unlock;
}
if (len > AR9170_MAC_BCN_LENGTH_MAX) {
if (net_ratelimit()) {
wiphy_err(ar->hw->wiphy, "no support for beacons "
"bigger than %d (yours:%d).\n",
AR9170_MAC_BCN_LENGTH_MAX, len);
}
err = -EMSGSIZE;
goto err_unlock;
}
i = txinfo->control.rates[0].idx;
if (txinfo->band != IEEE80211_BAND_2GHZ)
i += 4;
word = __carl9170_ratetable[i].hw_value & 0xf;
if (i < 4)
word |= ((skb->len + FCS_LEN) << (3 + 16)) + 0x0400;
else
word |= ((skb->len + FCS_LEN) << 16) + 0x0010;
carl9170_async_regwrite_begin(ar);
carl9170_async_regwrite(AR9170_MAC_REG_BCN_PLCP, word);
for (i = 0; i < DIV_ROUND_UP(skb->len, 4); i++) {
/*
* XXX: This accesses beyond skb data for up
* to the last 3 bytes!!
*/
if (old && (data[i] == old[i]))
continue;
word = le32_to_cpu(data[i]);
carl9170_async_regwrite(addr + 4 * i, word);
}
carl9170_async_regwrite_finish();
dev_kfree_skb_any(cvif->beacon);
cvif->beacon = NULL;
err = carl9170_async_regwrite_result();
if (!err)
cvif->beacon = skb;
spin_unlock_bh(&ar->beacon_lock);
if (err)
goto err_free;
if (submit) {
err = carl9170_bcn_ctrl(ar, cvif->id,
CARL9170_BCN_CTRL_CAB_TRIGGER,
addr, skb->len + FCS_LEN);
if (err)
goto err_free;
}
out_unlock:
rcu_read_unlock();
return 0;
err_unlock:
spin_unlock_bh(&ar->beacon_lock);
err_free:
rcu_read_unlock();
dev_kfree_skb_any(skb);
return err;
}
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);
}