/*
    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

/**
 * @file    serial_nor.h
 * @brief   Serial NOR driver header.
 *
 * @addtogroup SERIAL_NOR
 * @ingroup SERIAL_NOR
 * @{
 */

#ifndef SERIAL_NOR_H
#define SERIAL_NOR_H

#include "hal_flash.h"

/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/

/**
 * @name    Bus interface modes.
 * @{
 */
#define SNOR_BUS_MODE_SPI                   0U
#define SNOR_BUS_MODE_WSPI1L                1U
#define SNOR_BUS_MODE_WSPI2L                2U
#define SNOR_BUS_MODE_WSPI4L                4U
#define SNOR_BUS_MODE_WSPI8L                8U
/** @} */

#define SNOR_BUS_CMD_EXTENDED_ADDRESSING    0x80000000U

/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/

/**
 * @name    Configuration options
 * @{
 */
/**
 * @brief   Physical transport interface.
 */
#if !defined(SNOR_BUS_MODE) || defined(__DOXYGEN__)
#define SNOR_BUS_MODE                       SNOR_BUS_MODE_WSPI4L
#endif

/**
 * @brief   Shared bus switch.
 * @details If set to @p TRUE the device acquires bus ownership
 *          on each transaction.
 * @note    Requires @p SPI_USE_MUTUAL_EXCLUSION or
 *          @p WSPI_USE_MUTUAL_EXCLUSION depending on mode selected
 *          with @p SNOR_BUS_MODE.
 */
#if !defined(SNOR_SHARED_BUS) || defined(__DOXYGEN__)
#define SNOR_SHARED_BUS                     TRUE
#endif
/** @} */

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

#if (SNOR_BUS_MODE != SNOR_BUS_MODE_SPI) || defined(__DOXYGEN__)
#define BUSConfig WSPIConfig
#define BUSDriver WSPIDriver
#else
#define BUSConfig SPIConfig
#define BUSDriver SPIDriver
#endif

/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/

/**
 * @brief   Type of a SNOR configuration structure.
 */
typedef struct {
  BUSDriver                 *busp;
  const BUSConfig           *buscfg;
} SNORConfig;

/**
 * @brief   @p SNORDriver specific methods.
 */
#define _snor_flash_methods_alone                                           \
  /* Read SFDP.*/                                                           \
  flash_error_t (*read_sfdp)(void *instance,                                \
                 flash_offset_t offset,                                     \
                 size_t n,                                                  \
                 uint8_t *rp);

/**
 * @brief   @p SNORDriver specific methods with inherited ones.
 */
#define _snor_flash_methods                                                 \
  _base_flash_methods                                                       \
  _snor_flash_methods_alone

/**
 * @extends BaseFlashVMT
 *
 * @brief   @p SNOR virtual methods table.
 */
struct SNORDriverVMT {
  _snor_flash_methods
};
  
/**
 * @extends BaseFlash
 *
 * @brief   Type of SNOR flash class.
 */
typedef struct {
  /**
   * @brief   SNORDriver Virtual Methods Table.
   */
  const struct SNORDriverVMT    *vmt;
  _base_flash_data
  /**
   * @brief   Current configuration data.
   */
  const SNORConfig              *config;
  /**
   * @brief   Device ID and unique ID.
   */
  uint8_t                       device_id[20];
} SNORDriver;

/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#ifdef __cplusplus
extern "C" {
#endif
  void bus_cmd(BUSDriver *busp, uint32_t cmd);
  void bus_cmd_send(BUSDriver *busp, uint32_t cmd, size_t n, const uint8_t *p);
  void bus_cmd_receive(BUSDriver *busp,
                       uint32_t cmd,
                       size_t n,
                       uint8_t *p);
  void bus_cmd_addr(BUSDriver *busp, uint32_t cmd, flash_offset_t offset);
  void bus_cmd_addr_send(BUSDriver *busp,
                         uint32_t cmd,
                         flash_offset_t offset,
                         size_t n,
                         const uint8_t *p);
  void bus_cmd_addr_receive(BUSDriver *busp,
                            uint32_t cmd,
                            flash_offset_t offset,
                            size_t n,
                            uint8_t *p);
  void bus_cmd_addr_dummy_receive(BUSDriver *busp,
                                  uint32_t cmd,
                                  flash_offset_t offset,
                                  uint32_t dummy,
                                  size_t n,
                                  uint8_t *p);
  void snorObjectInit(SNORDriver *devp);
  void snorStart(SNORDriver *devp, const SNORConfig *config);
  void snorStop(SNORDriver *devp);
#if (SNOR_BUS_MODE != SNOR_BUS_MODE_SPI) || defined(__DOXYGEN__)
#if (WSPI_SUPPORTS_MEMMAP == TRUE) || defined(__DOXYGEN__)
  void snorMemoryMap(SNORDriver *devp, uint8_t ** addrp);
  void snorMemoryUnmap(SNORDriver *devp);
#endif /* QSPI_SUPPORTS_MEMMAP == TRUE */
#endif /* SNOR_BUS_MODE != SNOR_BUS_MODE_SPI */
#ifdef __cplusplus
}
#endif

/* Device-specific implementations.*/
#include "flash_device.h"

#endif /* SERIAL_NOR_H */

/** @} */