/*
* Reset a key entry on the table
*/
int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
{
unsigned int i;
ATH5K_TRACE(ah->ah_sc);
AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
/*
* Set NULL encryption on AR5212+
*
* Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
* AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
*
* Note2: Windows driver (ndiswrapper) sets this to
* 0x00000714 instead of 0x00000007
*/
if (ah->ah_version > AR5K_AR5211)
ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
AR5K_KEYTABLE_TYPE(entry));
return 0;
}
/*
* Reset a key entry on the table
*/
int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
{
unsigned int i, type;
u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
ATH5K_TRACE(ah->ah_sc);
AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
type = ath5k_hw_reg_read(ah, AR5K_KEYTABLE_TYPE(entry));
for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
/* Reset associated MIC entry if TKIP
* is enabled located at offset (entry + 64) */
if (type == AR5K_KEYTABLE_TYPE_TKIP) {
AR5K_ASSERT_ENTRY(micentry, AR5K_KEYTABLE_SIZE);
for (i = 0; i < AR5K_KEYCACHE_SIZE / 2 ; i++)
ath5k_hw_reg_write(ah, 0,
AR5K_KEYTABLE_OFF(micentry, i));
}
/*
* Set NULL encryption on AR5212+
*
* Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
* AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
*
* Note2: Windows driver (ndiswrapper) sets this to
* 0x00000714 instead of 0x00000007
*/
if (ah->ah_version >= AR5K_AR5211) {
ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
AR5K_KEYTABLE_TYPE(entry));
if (type == AR5K_KEYTABLE_TYPE_TKIP) {
ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
AR5K_KEYTABLE_TYPE(micentry));
}
}
return 0;
}
/*
* Set a key entry on the table
*/
int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
const struct ieee80211_key_conf *key, const u8 *mac)
{
unsigned int i;
__le32 key_v[5] = {};
u32 keytype;
ATH5K_TRACE(ah->ah_sc);
/* key->keylen comes in from mac80211 in bytes */
if (key->keylen > AR5K_KEYTABLE_SIZE / 8)
return -EOPNOTSUPP;
switch (key->keylen) {
/* WEP 40-bit = 40-bit entered key + 24 bit IV = 64-bit */
case 40 / 8:
memcpy(&key_v[0], key->key, 5);
keytype = AR5K_KEYTABLE_TYPE_40;
break;
/* WEP 104-bit = 104-bit entered key + 24-bit IV = 128-bit */
case 104 / 8:
memcpy(&key_v[0], &key->key[0], 6);
memcpy(&key_v[2], &key->key[6], 6);
memcpy(&key_v[4], &key->key[12], 1);
keytype = AR5K_KEYTABLE_TYPE_104;
break;
/* WEP 128-bit = 128-bit entered key + 24 bit IV = 152-bit */
case 128 / 8:
memcpy(&key_v[0], &key->key[0], 6);
memcpy(&key_v[2], &key->key[6], 6);
memcpy(&key_v[4], &key->key[12], 4);
keytype = AR5K_KEYTABLE_TYPE_128;
break;
default:
return -EINVAL; /* shouldn't happen */
}
for (i = 0; i < ARRAY_SIZE(key_v); i++)
ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
AR5K_KEYTABLE_OFF(entry, i));
ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
return ath5k_hw_set_key_lladdr(ah, entry, mac);
}
/*
* Set a key entry on the table
*/
int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
const struct ieee80211_key_conf *key, const u8 *mac)
{
unsigned int i;
int keylen;
__le32 key_v[5] = {};
__le32 key0 = 0, key1 = 0;
__le32 *rxmic, *txmic;
int keytype;
u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
bool is_tkip;
const u8 *key_ptr;
ATH5K_TRACE(ah->ah_sc);
is_tkip = (key->alg == ALG_TKIP);
/*
* key->keylen comes in from mac80211 in bytes.
* TKIP is 128 bit + 128 bit mic
*/
keylen = (is_tkip) ? (128 / 8) : key->keylen;
if (entry > AR5K_KEYTABLE_SIZE ||
(is_tkip && micentry > AR5K_KEYTABLE_SIZE))
return -EOPNOTSUPP;
if (unlikely(keylen > 16))
return -EOPNOTSUPP;
keytype = ath5k_keycache_type(key);
if (keytype < 0)
return keytype;
/*
* each key block is 6 bytes wide, written as pairs of
* alternating 32 and 16 bit le values.
*/
key_ptr = key->key;
for (i = 0; keylen >= 6; keylen -= 6) {
memcpy(&key_v[i], key_ptr, 6);
i += 2;
key_ptr += 6;
}
if (keylen)
memcpy(&key_v[i], key_ptr, keylen);
/* intentionally corrupt key until mic is installed */
if (is_tkip) {
key0 = key_v[0] = ~key_v[0];
key1 = key_v[1] = ~key_v[1];
}
for (i = 0; i < ARRAY_SIZE(key_v); i++)
ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
AR5K_KEYTABLE_OFF(entry, i));
ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
if (is_tkip) {
/* Install rx/tx MIC */
rxmic = (__le32 *) &key->key[16];
txmic = (__le32 *) &key->key[24];
if (ah->ah_combined_mic) {
key_v[0] = rxmic[0];
key_v[1] = cpu_to_le32(le32_to_cpu(txmic[0]) >> 16);
key_v[2] = rxmic[1];
key_v[3] = cpu_to_le32(le32_to_cpu(txmic[0]) & 0xffff);
key_v[4] = txmic[1];
} else {