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/************************************************************************************
* arch/arm/src/sama5/chip/sam_trng.h
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_SAMA5_CHIP_SAM_TRNG_H
#define __ARCH_ARM_SRC_SAMA5_CHIP_SAM_TRNG_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include "chip/sam_memorymap.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* TRNG Register Offsets ************************************************************/
#define SAM_TRNG_CR_OFFSET 0x0000 /* Control Register */
#define SAM_TRNG_IER_OFFSET 0x0010 /* Interrupt Enable Register */
#define SAM_TRNG_IDR_OFFSET 0x0014 /* Interrupt Disable Register */
#define SAM_TRNG_IMR_OFFSET 0x0018 /* Interrupt Mask Register */
#define SAM_TRNG_ISR_OFFSET 0x001c /* Interrupt Status Register */
#define SAM_TRNG_ODATA_OFFSET 0x0050 /* Output Data Register */
/* TRNG Register Addresses **********************************************************/
#define SAM_TRNG_CR (SAM_TRNG_VBASE+SAM_TRNG_CR_OFFSET)
#define SAM_TRNG_IER (SAM_TRNG_VBASE+SAM_TRNG_IER_OFFSET)
#define SAM_TRNG_IDR (SAM_TRNG_VBASE+SAM_TRNG_IDR_OFFSET)
#define SAM_TRNG_IMR (SAM_TRNG_VBASE+SAM_TRNG_IMR_OFFSET)
#define SAM_TRNG_ISR (SAM_TRNG_VBASE+SAM_TRNG_ISR_OFFSET)
#define SAM_TRNG_ODATA (SAM_TRNG_VBASE+SAM_TRNG_ODATA_OFFSET)
/* TRNG Register Bit Definitions ****************************************************/
/* Control Register */
#define TRNG_CR_ENABLE (1 << 0) /* Bit 0: nables the TRNG */
#define TRNG_CR_KEY_SHIFT (8) /* Bits 8-31: Security key */
#define TRNG_CR_KEY_MASK (0xffffff << TRNG_CR_KEY_SHIFT)
# define TRNG_CR_KEY (0x524e47 << TRNG_CR_KEY_SHIFT) /* RNG in ASCII */
/* Interrupt Enable Register, Interrupt Disable Register, Interrupt Mask Register,
* and Interrupt Status Register
*/
#define TRNG_INT_DATRDY (1 << 0) /* Bit 0: Data ready */
/* Output Data Register (32-bit output data) */
#endif /* __ARCH_ARM_SRC_SAMA5_CHIP_SAM_TRNG_H */
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