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- /*
- * Copyright (c) 2009 Atheros Communications Inc.
- * Copyright (c) 2010 Bruno Randolf <br1@einfach.org>
- *
- * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011
- * Original from Linux kernel 3.0.1
- *
- * 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 "ath.h"
- #include "reg.h"
-
- #define REG_READ (common->ops->read)
- #define REG_WRITE(_ah, _reg, _val) (common->ops->write)(_ah, _val, _reg)
- #define ENABLE_REGWRITE_BUFFER(_ah) \
- if (common->ops->enable_write_buffer) \
- common->ops->enable_write_buffer((_ah));
-
- #define REGWRITE_BUFFER_FLUSH(_ah) \
- if (common->ops->write_flush) \
- common->ops->write_flush((_ah));
-
-
- #define IEEE80211_WEP_NKID 4 /* number of key ids */
-
- /************************/
- /* Key Cache Management */
- /************************/
-
- int ath_hw_keyreset(struct ath_common *common, u16 entry)
- {
- u32 keyType;
- void *ah = common->ah;
-
- if (entry >= common->keymax) {
- DBG("ath: keycache entry %d out of range\n", entry);
- return 0;
- }
-
- keyType = REG_READ(ah, AR_KEYTABLE_TYPE(entry));
-
- ENABLE_REGWRITE_BUFFER(ah);
-
- REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), 0);
- REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), AR_KEYTABLE_TYPE_CLR);
- REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), 0);
- REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), 0);
-
- if (keyType == AR_KEYTABLE_TYPE_TKIP) {
- u16 micentry = entry + 64;
-
- REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), 0);
- REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), 0);
- if (common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED) {
- REG_WRITE(ah, AR_KEYTABLE_KEY4(micentry), 0);
- REG_WRITE(ah, AR_KEYTABLE_TYPE(micentry),
- AR_KEYTABLE_TYPE_CLR);
- }
-
- }
-
- REGWRITE_BUFFER_FLUSH(ah);
-
- return 1;
- }
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