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/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
*
* 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 "mt76.h"
#include "mt76x02_regs.h"
enum mt76x02_cipher_type
mt76x02_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data)
{
memset(key_data, 0, 32);
if (!key)
return MT_CIPHER_NONE;
if (key->keylen > 32)
return MT_CIPHER_NONE;
memcpy(key_data, key->key, key->keylen);
switch (key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
return MT_CIPHER_WEP40;
case WLAN_CIPHER_SUITE_WEP104:
return MT_CIPHER_WEP104;
case WLAN_CIPHER_SUITE_TKIP:
return MT_CIPHER_TKIP;
case WLAN_CIPHER_SUITE_CCMP:
return MT_CIPHER_AES_CCMP;
default:
return MT_CIPHER_NONE;
}
}
EXPORT_SYMBOL_GPL(mt76x02_mac_get_key_info);
int mt76x02_mac_shared_key_setup(struct mt76_dev *dev, u8 vif_idx, u8 key_idx,
struct ieee80211_key_conf *key)
{
enum mt76x02_cipher_type cipher;
u8 key_data[32];
u32 val;
cipher = mt76x02_mac_get_key_info(key, key_data);
if (cipher == MT_CIPHER_NONE && key)
return -EOPNOTSUPP;
val = __mt76_rr(dev, MT_SKEY_MODE(vif_idx));
val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx));
val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx);
__mt76_wr(dev, MT_SKEY_MODE(vif_idx), val);
__mt76_wr_copy(dev, MT_SKEY(vif_idx, key_idx), key_data,
sizeof(key_data));
return 0;
}
EXPORT_SYMBOL_GPL(mt76x02_mac_shared_key_setup);
int mt76x02_mac_wcid_set_key(struct mt76_dev *dev, u8 idx,
struct ieee80211_key_conf *key)
{
enum mt76x02_cipher_type cipher;
u8 key_data[32];
u8 iv_data[8];
cipher = mt76x02_mac_get_key_info(key, key_data);
if (cipher == MT_CIPHER_NONE && key)
return -EOPNOTSUPP;
__mt76_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data));
__mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PKEY_MODE, cipher);
memset(iv_data, 0, sizeof(iv_data));
if (key) {
__mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PAIRWISE,
!!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
iv_data[3] = key->keyidx << 6;
if (cipher >= MT_CIPHER_TKIP)
iv_data[3] |= 0x20;
}
__mt76_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data));
return 0;
}
EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_set_key);
void mt76x02_mac_wcid_setup(struct mt76_dev *dev, u8 idx, u8 vif_idx, u8 *mac)
{
struct mt76_wcid_addr addr = {};
u32 attr;
attr = FIELD_PREP(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) |
FIELD_PREP(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8));
__mt76_wr(dev, MT_WCID_ATTR(idx), attr);
__mt76_wr(dev, MT_WCID_TX_RATE(idx), 0);
__mt76_wr(dev, MT_WCID_TX_RATE(idx) + 4, 0);
if (idx >= 128)
return;
if (mac)
memcpy(addr.macaddr, mac, ETH_ALEN);
__mt76_wr_copy(dev, MT_WCID_ADDR(idx), &addr, sizeof(addr));
}
EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_setup);
void mt76x02_mac_wcid_set_drop(struct mt76_dev *dev, u8 idx, bool drop)
{
u32 val = __mt76_rr(dev, MT_WCID_DROP(idx));
u32 bit = MT_WCID_DROP_MASK(idx);
/* prevent unnecessary writes */
if ((val & bit) != (bit * drop))
__mt76_wr(dev, MT_WCID_DROP(idx), (val & ~bit) | (bit * drop));
}
EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_set_drop);
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