mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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1a29ef8e97
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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* arch/ubicom32/crypto/crypto_ubicom32.c
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* Generic code to support ubicom32 hardware crypto accelerator
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*
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* (C) Copyright 2009, Ubicom, Inc.
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*
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* Ubicom32 implementation derived from (with many thanks):
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* arch/m68knommu
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* arch/blackfin
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* arch/parisc
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*/
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#include "crypto_ubicom32.h"
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spinlock_t crypto_ubicom32_lock;
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bool crypto_ubicom32_inited = false;
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volatile bool crypto_ubicom32_on = false;
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volatile unsigned long crypto_ubicom32_last_use;
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struct timer_list crypto_ubicom32_ps_timer;
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void crypto_ubicom32_ps_check(unsigned long data)
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{
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unsigned long idle_time = msecs_to_jiffies(HW_CRYPTO_PS_MAX_IDLE_MS);
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BUG_ON(!crypto_ubicom32_on);
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if (((jiffies - crypto_ubicom32_last_use) > idle_time) && spin_trylock_bh(&crypto_ubicom32_lock)) {
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hw_crypto_turn_off();
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spin_unlock_bh(&crypto_ubicom32_lock);
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return;
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}
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/* keep monitoring */
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hw_crypto_ps_start();
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}
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