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-/******************************************************************************
-**
-** FILE NAME : ifxmips_sha1.c
-** PROJECT : IFX UEIP
-** MODULES : DEU Module for Danube
-**
-** DATE : September 8, 2009
-** AUTHOR : Mohammad Firdaus
-** DESCRIPTION : Data Encryption Unit Driver
-** COPYRIGHT : Copyright (c) 2009
-** Infineon Technologies AG
-** Am Campeon 1-12, 85579 Neubiberg, Germany
-**
-** This program 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.
-**
-** HISTORY
-** $Date $Author $Comment
-** 08,Sept 2009 Mohammad Firdaus Initial UEIP release
-*******************************************************************************/
-/*!
- \defgroup IFX_DEU IFX_DEU_DRIVERS
- \ingroup API
- \brief ifx deu driver module
-*/
-
-/*!
- \file ifxmips_sha1.c
- \ingroup IFX_DEU
- \brief SHA1 encryption deu driver file
-*/
-
-/*!
- \defgroup IFX_SHA1_FUNCTIONS IFX_SHA1_FUNCTIONS
- \ingroup IFX_DEU
- \brief ifx deu sha1 functions
-*/
-
-
-/* Project header */
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/crypto.h>
-#include <linux/cryptohash.h>
-#include <crypto/sha.h>
-#include <crypto/internal/hash.h>
-#include <linux/types.h>
-#include <asm/scatterlist.h>
-#include <asm/byteorder.h>
-
-#if defined(CONFIG_DANUBE)
-#include "ifxmips_deu_danube.h"
-#elif defined(CONFIG_AR9)
-#include "ifxmips_deu_ar9.h"
-#elif defined(CONFIG_VR9) || defined(CONFIG_AR10)
-#include "ifxmips_deu_vr9.h"
-#else
-#error "Plaform Unknwon!"
-#endif
-
-#define SHA1_DIGEST_SIZE 20
-#define SHA1_HMAC_BLOCK_SIZE 64
-#define HASH_START IFX_HASH_CON
-
-static spinlock_t lock;
-#define CRTCL_SECT_INIT spin_lock_init(&lock)
-#define CRTCL_SECT_START spin_lock_irqsave(&lock, flag)
-#define CRTCL_SECT_END spin_unlock_irqrestore(&lock, flag)
-
-//#define CRYPTO_DEBUG
-#ifdef CRYPTO_DEBUG
-extern char debug_level;
-#define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args);
-#else
-#define DPRINTF(level, format, args...)
-#endif
-
-/*
- * \brief SHA1 private structure
-*/
-struct sha1_ctx {
- int started;
- u64 count;
- u32 hash[5];
- u32 state[5];
- u8 buffer[64];
-};
-
-extern int disable_deudma;
-
-
-/*! \fn static void sha1_transform (u32 *state, const u32 *in)
- * \ingroup IFX_SHA1_FUNCTIONS
- * \brief main interface to sha1 hardware
- * \param state current state
- * \param in 64-byte block of input
-*/
-static void sha1_transform (struct sha1_ctx *sctx, u32 *state, const u32 *in)
-{
- int i = 0;
- volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START;
- unsigned long flag;
-
- CRTCL_SECT_START;
-
- /* For context switching purposes, the previous hash output
- * is loaded back into the output register
- */
- if (sctx->started) {
- hashs->D1R = *((u32 *) sctx->hash + 0);
- hashs->D2R = *((u32 *) sctx->hash + 1);
- hashs->D3R = *((u32 *) sctx->hash + 2);
- hashs->D4R = *((u32 *) sctx->hash + 3);
- hashs->D5R = *((u32 *) sctx->hash + 4);
- }
-
- for (i = 0; i < 16; i++) {
- hashs->MR = in[i];
- };
-
- //wait for processing
- while (hashs->controlr.BSY) {
- // this will not take long
- }
-
- /* For context switching purposes, the output is saved into a
- * context struct which can be used later on
- */
- *((u32 *) sctx->hash + 0) = hashs->D1R;
- *((u32 *) sctx->hash + 1) = hashs->D2R;
- *((u32 *) sctx->hash + 2) = hashs->D3R;
- *((u32 *) sctx->hash + 3) = hashs->D4R;
- *((u32 *) sctx->hash + 4) = hashs->D5R;
-
- sctx->started = 1;
-
- CRTCL_SECT_END;
-}
-
-/*! \fn static void sha1_init(struct crypto_tfm *tfm)
- * \ingroup IFX_SHA1_FUNCTIONS
- * \brief initialize sha1 hardware
- * \param tfm linux crypto algo transform
-*/
-static int sha1_init(struct shash_desc *desc)
-{
- struct sha1_ctx *sctx = shash_desc_ctx(desc);
-
- SHA_HASH_INIT;
-
- sctx->started = 0;
- sctx->count = 0;
- return 0;
-}
-
-/*! \fn static void sha1_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
- * \ingroup IFX_SHA1_FUNCTIONS
- * \brief on-the-fly sha1 computation
- * \param tfm linux crypto algo transform
- * \param data input data
- * \param len size of input data
-*/
-static int sha1_update(struct shash_desc * desc, const u8 *data,
- unsigned int len)
-{
- struct sha1_ctx *sctx = shash_desc_ctx(desc);
- unsigned int i, j;
-
- j = (sctx->count >> 3) & 0x3f;
- sctx->count += len << 3;
-
- if ((j + len) > 63) {
- memcpy (&sctx->buffer[j], data, (i = 64 - j));
- sha1_transform (sctx, sctx->state, (const u32 *)sctx->buffer);
- for (; i + 63 < len; i += 64) {
- sha1_transform (sctx, sctx->state, (const u32 *)&data[i]);
- }
-
- j = 0;
- }
- else
- i = 0;
-
- memcpy (&sctx->buffer[j], &data[i], len - i);
- return 0;
-}
-
-/*! \fn static void sha1_final(struct crypto_tfm *tfm, u8 *out)
- * \ingroup IFX_SHA1_FUNCTIONS
- * \brief compute final sha1 value
- * \param tfm linux crypto algo transform
- * \param out final md5 output value
-*/
-static int sha1_final(struct shash_desc *desc, u8 *out)
-{
- struct sha1_ctx *sctx = shash_desc_ctx(desc);
- u32 index, padlen;
- u64 t;
- u8 bits[8] = { 0, };
- static const u8 padding[64] = { 0x80, };
- volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START;
- unsigned long flag;
-
- t = sctx->count;
- bits[7] = 0xff & t;
- t >>= 8;
- bits[6] = 0xff & t;
- t >>= 8;
- bits[5] = 0xff & t;
- t >>= 8;
- bits[4] = 0xff & t;
- t >>= 8;
- bits[3] = 0xff & t;
- t >>= 8;
- bits[2] = 0xff & t;
- t >>= 8;
- bits[1] = 0xff & t;
- t >>= 8;
- bits[0] = 0xff & t;
-
- /* Pad out to 56 mod 64 */
- index = (sctx->count >> 3) & 0x3f;
- padlen = (index < 56) ? (56 - index) : ((64 + 56) - index);
- sha1_update (desc, padding, padlen);
-
- /* Append length */
- sha1_update (desc, bits, sizeof bits);
-
- CRTCL_SECT_START;
-
- *((u32 *) out + 0) = hashs->D1R;
- *((u32 *) out + 1) = hashs->D2R;
- *((u32 *) out + 2) = hashs->D3R;
- *((u32 *) out + 3) = hashs->D4R;
- *((u32 *) out + 4) = hashs->D5R;
-
- CRTCL_SECT_END;
-
- // Wipe context
- memset (sctx, 0, sizeof *sctx);
-
- return 0;
-}
-
-/*
- * \brief SHA1 function mappings
-*/
-static struct shash_alg ifxdeu_sha1_alg = {
- .digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_init,
- .update = sha1_update,
- .final = sha1_final,
- .descsize = sizeof(struct sha1_ctx),
- .statesize = sizeof(struct sha1_state),
- .base = {
- .cra_name = "sha1",
- .cra_driver_name= "ifxdeu-sha1",
- .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
- .cra_blocksize = SHA1_HMAC_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-
-/*! \fn int __init ifxdeu_init_sha1 (void)
- * \ingroup IFX_SHA1_FUNCTIONS
- * \brief initialize sha1 driver
-*/
-int __init ifxdeu_init_sha1 (void)
-{
- int ret = -ENOSYS;
-
-
- if ((ret = crypto_register_shash(&ifxdeu_sha1_alg)))
- goto sha1_err;
-
- CRTCL_SECT_INIT;
-
- printk (KERN_NOTICE "IFX DEU SHA1 initialized%s.\n", disable_deudma ? "" : " (DMA)");
- return ret;
-
-sha1_err:
- printk(KERN_ERR "IFX DEU SHA1 initialization failed!\n");
- return ret;
-}
-
-/*! \fn void __exit ifxdeu_fini_sha1 (void)
- * \ingroup IFX_SHA1_FUNCTIONS
- * \brief unregister sha1 driver
-*/
-void __exit ifxdeu_fini_sha1 (void)
-{
- crypto_unregister_shash(&ifxdeu_sha1_alg);
-
-
-}
-
-
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