/****************************************************************************
 * include/nuttx/mtd/onfi.h
 *
 * ONFI Support.  The Open NAND Flash Interface (ONFI) is an industry
 * Workgroup made up of more than 100 companies that build, design-in, or
 * enable NAND Flash memory. This file provides definitions for standardized
 * ONFI NAND interfaces.
 *
 *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * This ONFI logic was based largely on Atmel sample code for the SAMA5D3x
 * with modifications for better integration with NuttX.  The Atmel sample
 * code has a BSD compatibile license that requires this copyright notice:
 *
 *   Copyright (c) 2010, Atmel Corporation
 *
 * 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 names NuttX nor Atmel 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 __INCLUDE_NUTTX_MTD_ONFI_H
#define __INCLUDE_NUTTX_MTD_ONFI_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Public Types
 ****************************************************************************/

/* Describes memory organization block information in ONFI parameter page*/

struct onfi_pgparam_s
{
  uint8_t manufacturer;   /* JEDEC manufacturer ID */
  uint8_t buswidth;       /* Bus width */
  uint8_t luns;           /* Number of logical units */
  uint8_t eccsize;        /* Number of bits of ECC correction */
  uint8_t model;          /* Device model */
  uint16_t sparesize;     /* Number of spare bytes per page */
  uint16_t pagesperblock; /* Number of pages per block */
  uint16_t blocksperlun;  /* Number of blocks per logical unit (LUN) */
  uint32_t pagesize;      /* Number of data bytes per page */
};

/****************************************************************************
 * Public Data
 ****************************************************************************/

#ifndef __ASSEMBLY__

#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/****************************************************************************
 * Name: onfi_compatible
 *
 * Description:
 *   This function read an the ONFI signature at address of 20h to detect
 *   if the device is ONFI compatiable.
 *
 * Input Parameters:
 *   cmdaddr  - NAND command address base
 *   addraddr - NAND address address base
 *   dataaddr - NAND data address
 *
 * Returned Value:
 *   True if ONFI compatible
 *
 ****************************************************************************/

bool onfi_compatible(uintptr_t cmdaddr, uintptr_t addraddr,
                     uintptr_t dataaddr);

/****************************************************************************
 * Name: onfi_read
 *
 * Description:
 *   If the addresses refer to a compatible ONFI device, then read the ONFI
 *   parameters from the FLASH into the user provided data staructure.
 *
 * Input Parameters:
 *   cmdaddr  - NAND command address base
 *   addraddr - NAND address address base
 *   dataaddr - NAND data address
 *   onfi     - The ONFI data structure to populate.
 *
 * Returned Value:
 *   OK is returned on success and the the ONFI data structure is initialized
 *   with NAND data.  A negated errno value is returned in the event of an
 *   error.
 *
 ****************************************************************************/

int onfi_read(uintptr_t cmdaddr, uintptr_t addraddr, uintptr_t dataaddr,
              FAR struct onfi_pgparam_s *onfi);

/****************************************************************************
 * Name: onfi_embeddedecc
 *
 * Description:
 *   Enable or disable the NAND's embedded ECC controller.
 *
 * Input Parameters:
 *   onfi     - An initialized ONFI data structure.
 *   cmdaddr  - NAND command address base
 *   addraddr - NAND address address base
 *   dataaddr - NAND data address
 *   enable - True: enabled the embedded ECC function; False: disable it
 *
 * Returned Value:
 *   True  - Internal ECC enabled or disabled successfully
 *   False - Internal ECC not supported.
 *
 ****************************************************************************/

#ifdef CONFIG_MTD_NAND_EMBEDDEDECC
bool onfi_embeddedecc(FAR const struct onfi_pgparam_s *onfi,
                      uintptr_t cmdaddr, uintptr_t addraddr,
                      uintptr_t dataaddr, bool enable);
#else
# define onfi_embeddedecc(o,c,a,d,e) (false)
#endif

/****************************************************************************
 * Name: onfi_ebidetect
 *
 * Description:
 *   Detect Nand connection on EBI
 *
 * Input Parameters:
 *   cmdaddr  - NAND command address base
 *   addraddr - NAND address address base
 *   dataaddr - NAND data address
 *
 * Returned Value:
 *   True if the chip is detected; false otherwise.
 *
 ****************************************************************************/

bool onfi_ebidetect(uintptr_t cmdaddr, uintptr_t addraddr, uintptr_t
                    dataaddr);

#undef EXTERN
#ifdef __cplusplus
}
#endif

#endif /* __ASSEMBLY__ */
#endif /* __INCLUDE_NUTTX_MTD_ONFI_H */