linux-imx

/*

 * Cryptographic API.

 *

 * Support for OMAP AES HW ACCELERATOR defines

 *

 * Copyright (c) 2015 Texas Instruments Incorporated

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as published

 * by the Free Software Foundation.

 *

 */

#ifndef __OMAP_AES_H__

#define __OMAP_AES_H__

​

#include <crypto/engine.h>

​

#define DST_MAXBURST            4

#define DMA_MIN             (DST_MAXBURST * sizeof(u32))

​

#define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)

​

/*

 * OMAP TRM gives bitfields as start:end, where start is the higher bit

 * number. For example 7:0

 */

#define FLD_MASK(start, end)    (((1 << ((start) - (end) + 1)) - 1) << (end))

#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))

​

#define AES_REG_KEY(dd, x)      ((dd)->pdata->key_ofs - \

                        (((x) ^ 0x01) * 0x04))

#define AES_REG_IV(dd, x)       ((dd)->pdata->iv_ofs + ((x) * 0x04))

​

#define AES_REG_CTRL(dd)        ((dd)->pdata->ctrl_ofs)

#define AES_REG_CTRL_CONTEXT_READY  BIT(31)

#define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7)

#define AES_REG_CTRL_CTR_WIDTH_32   0

#define AES_REG_CTRL_CTR_WIDTH_64   BIT(7)

#define AES_REG_CTRL_CTR_WIDTH_96   BIT(8)

#define AES_REG_CTRL_CTR_WIDTH_128  GENMASK(8, 7)

#define AES_REG_CTRL_GCM        GENMASK(17, 16)

#define AES_REG_CTRL_CTR        BIT(6)

#define AES_REG_CTRL_CBC        BIT(5)

#define AES_REG_CTRL_KEY_SIZE       GENMASK(4, 3)

#define AES_REG_CTRL_DIRECTION      BIT(2)

#define AES_REG_CTRL_INPUT_READY    BIT(1)

#define AES_REG_CTRL_OUTPUT_READY   BIT(0)

#define AES_REG_CTRL_MASK       GENMASK(24, 2)

​

#define AES_REG_C_LEN_0         0x54

#define AES_REG_C_LEN_1         0x58

#define AES_REG_A_LEN           0x5C

​

#define AES_REG_DATA_N(dd, x)       ((dd)->pdata->data_ofs + ((x) * 0x04))

#define AES_REG_TAG_N(dd, x)        (0x70 + ((x) * 0x04))

​

#define AES_REG_REV(dd)         ((dd)->pdata->rev_ofs)

​

#define AES_REG_MASK(dd)        ((dd)->pdata->mask_ofs)

#define AES_REG_MASK_SIDLE      BIT(6)

#define AES_REG_MASK_START      BIT(5)

#define AES_REG_MASK_DMA_OUT_EN     BIT(3)

#define AES_REG_MASK_DMA_IN_EN      BIT(2)