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/*
* arch/ubicom32/crypto/crypto_ubicom32.c
* Generic code to support ubicom32 hardware crypto accelerator
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port 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.
*
* The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*
* Ubicom32 implementation derived from (with many thanks):
* arch/m68knommu
* arch/blackfin
* arch/parisc
*/
#include "crypto_ubicom32.h"
spinlock_t crypto_ubicom32_lock;
bool crypto_ubicom32_inited = false;
volatile bool crypto_ubicom32_on = false;
volatile unsigned long crypto_ubicom32_last_use;
struct timer_list crypto_ubicom32_ps_timer;
void crypto_ubicom32_ps_check(unsigned long data)
{
unsigned long idle_time = msecs_to_jiffies(HW_CRYPTO_PS_MAX_IDLE_MS);
BUG_ON(!crypto_ubicom32_on);
if (((jiffies - crypto_ubicom32_last_use) > idle_time) && spin_trylock_bh(&crypto_ubicom32_lock)) {
hw_crypto_turn_off();
spin_unlock_bh(&crypto_ubicom32_lock);
return;
}
/* keep monitoring */
hw_crypto_ps_start();
}
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