/* mbed Microcontroller Library
 *******************************************************************************
 * Copyright (c) 2014, Realtek Semiconductor Corp.
 * All rights reserved.
 *
 * This module is a confidential and proprietary property of RealTek and
 * possession or use of this module requires written permission of RealTek.
 *******************************************************************************
 */


#include "objects.h"
#include "PinNames.h"


#include "pinmap.h"

#include "rtl8195a.h"
#include "hal_spi_flash.h"
#include "hal_platform.h"
#include "rtl8195a_spi_flash.h"
#include "hal_api.h"
#include "flash_api.h"

extern u32 ConfigDebugInfo;

/**
  * global data structure
  */   
flash_t	        flash;

static void flash_init(flash_t *obj);

/**
  * @brief  lock flash access
  * @param  none
  * @retval none
  */   
void flash_lock()
{

	HAL_WRITE32(0xE000ED00, 0x9C, 0x9807E012);
	HAL_WRITE32(0xE000ED00, 0xA0, 0x06000017);
}

/**
  * @brief  unlock flash access
  * @param  none
  * @retval none
  */  
void flash_unlock()
{
	HAL_WRITE32(0xE000ED00, 0x9C, 0x9807E012);
	HAL_WRITE32(0xE000ED00, 0xA0, 0x03000017);
}

/**
  * @brief  Control the flash chip write protect enable/disable
  * @param  protect: 1/0: protect/unprotect
  * @retval none
  */   
void flash_write_protect(flash_t *obj, uint32_t protect)
{
    flash_init(obj);
    SpicWriteProtectFlashRtl8195A(protect);
    SpicDisableRtl8195A();
}

/**
  * @brief  Init Flash
  * @param  obj: address of the flash object
  * @retval   none
  */
static void flash_init(flash_t *obj)
{
	//SPIC_INIT_PARA spic_init_para;

	// Init SPI Flash Controller
//	DBG_8195A("Initial Spi Flash Controller\n");
	SPI_FLASH_PIN_FCTRL(ON);

	if (!SpicFlashInitRtl8195A(SpicOneBitMode)){

		DBG_8195A("SPI Init Fail!!!!!!\n");
		HAL_WRITE32(SYSTEM_CTRL_BASE, REG_SYS_DSTBY_INFO3, HAL_READ32(SYSTEM_CTRL_BASE, REG_SYS_DSTBY_INFO3)|0xf);
	}
	else {
//		DBG_8195A("SPI Init SUCCESS\n");
	}
}

/**
  * @brief  Erase flash sector
  * @param  address: Specifies the starting address to be erased.
  * @retval   none
  */
void flash_erase_sector(flash_t *obj, uint32_t address)
{
    flash_init(obj);
	SpicSectorEraseFlashRtl8195A(SPI_FLASH_BASE + address);
    SpicDisableRtl8195A();
}

/**
  * @brief  Read a word from specified address
  * @param  obj: Specifies the parameter of flash object.
  * @param  address: Specifies the address to be read.
  * @param  data: Specified the address to save the readback data.
  * @retval   status: Success:1 or Failure: Others.
  */
int  flash_read_word(flash_t *obj, uint32_t address, uint32_t * data)
{
	
	// Check address
	
	// Read Word
    flash_init(obj);

	// Wait flash busy done (wip=0)
	SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);

	* data = HAL_READ32(SPI_FLASH_BASE, address);
    SpicDisableRtl8195A();

	return 1;
}

/**
  * @brief  Write a word to specified address
  * @param  obj: Specifies the parameter of flash object.
  * @param  address: Specifies the address to be programmed.
  * @param  data: Specified the data to be programmed.
  * @retval   status: Success:1 or Failure: Others.
  */
int  flash_write_word(flash_t *obj, uint32_t address, uint32_t data)
{
    // Disable write protection
//    flash_unlock();
    flash_init(obj);

	//Write word
	HAL_WRITE32(SPI_FLASH_BASE, address, data);

	// Wait spic busy done
	SpicWaitBusyDoneRtl8195A();
	
	// Wait flash busy done (wip=0)
	SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);

    SpicDisableRtl8195A();
    // Enable write protection
//	flash_lock();
	return 1;
}


/**
  * @brief  Read a stream of data from specified address
  * @param  obj: Specifies the parameter of flash object.
  * @param  address: Specifies the address to be read.
  * @param  len: Specifies the length of the data to read.
  * @param  data: Specified the address to save the readback data.
  * @retval   status: Success:1 or Failure: Others.
  */
int  flash_stream_read(flash_t *obj, uint32_t address, uint32_t len, uint8_t * data)
{
    u32 offset_to_align;
    u32 i;
    u32 read_word;
    uint8_t *ptr;
    uint8_t *pbuf;

    flash_init(obj);

	// Wait flash busy done (wip=0)
	SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);

    offset_to_align = address & 0x03;
    pbuf = data;
    if (offset_to_align != 0) {
        // the start address is not 4-bytes aligned
        read_word = HAL_READ32(SPI_FLASH_BASE, (address - offset_to_align));
        ptr = (uint8_t*)&read_word + offset_to_align;
        offset_to_align = 4 - offset_to_align;
        for (i=0;i<offset_to_align;i++) {
            *pbuf = *(ptr+i);
            pbuf++;
            len--;
            if (len == 0) {
                break;
            }
        }
    }

    address = (((address-1) >> 2) + 1) << 2;    // address = next 4-bytes aligned

    ptr = (uint8_t*)&read_word;
    if ((u32)pbuf & 0x03) {
        while (len >= 4) {
            read_word = HAL_READ32(SPI_FLASH_BASE, address);
            for (i=0;i<4;i++) {
                *pbuf = *(ptr+i);
                pbuf++;
            }
            address += 4;
            len -= 4;
        }
    }
    else {
        while (len >= 4) {
            *((u32 *)pbuf) = HAL_READ32(SPI_FLASH_BASE, address);
            pbuf += 4;
            address += 4;
            len -= 4;
        }
    }

    if (len > 0) {
        read_word = HAL_READ32(SPI_FLASH_BASE, address);
        for (i=0;i<len;i++) {
            *pbuf = *(ptr+i);
            pbuf++;
        }        
    }

    SpicDisableRtl8195A();
    return 1;
}

/**
  * @brief  Write a stream of data to specified address
  * @param  obj: Specifies the parameter of flash object.
  * @param  address: Specifies the address to be read.
  * @param  len: Specifies the length of the data to write.
  * @param  data: Specified the pointer of the data to be written.
  * @retval   status: Success:1 or Failure: Others.
  */
int  flash_stream_write(flash_t *obj, uint32_t address, uint32_t len, uint8_t * data)
{
    u32 offset_to_align;
    u32 align_addr;
    u32 i;
    u32 write_word;
    uint8_t *ptr;
    uint8_t *pbuf;
    
    flash_init(obj);
    
    offset_to_align = address & 0x03;
    pbuf = data;
    if (offset_to_align != 0) {
        // the start address is not 4-bytes aligned
        align_addr = (address - offset_to_align);
        write_word = HAL_READ32(SPI_FLASH_BASE, align_addr);        
        ptr = (uint8_t*)&write_word + offset_to_align;
        offset_to_align = 4 - offset_to_align;
        for (i=0;i<offset_to_align;i++) {
            *(ptr+i) = *pbuf;
            pbuf++;
            len--;
            if (len == 0) {
                break;
            }
        }
        //Write word
        HAL_WRITE32(SPI_FLASH_BASE, align_addr, write_word);
        // Wait spic busy done
        SpicWaitBusyDoneRtl8195A();
        // Wait flash busy done (wip=0)
        SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);
    }

    address = (((address-1) >> 2) + 1) << 2;    // address = next 4-bytes aligned

    if ((u32)pbuf & 0x03) {
        while (len >= 4) {
            write_word = (u32)(*pbuf) | ((u32)(*(pbuf+1)) << 8) | ((u32)(*(pbuf+2)) << 16) | ((u32)(*(pbuf+3)) << 24);
            //Write word
            HAL_WRITE32(SPI_FLASH_BASE, address, write_word);
            // Wait spic busy done
            SpicWaitBusyDoneRtl8195A();
            // Wait flash busy done (wip=0)
            SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);
            pbuf += 4;
            address += 4;
            len -= 4;
        }
    }
    else {
        while (len >= 4) {
            //Write word
            HAL_WRITE32(SPI_FLASH_BASE, address, (u32)*((u32 *)pbuf));
            // Wait spic busy done
            SpicWaitBusyDoneRtl8195A();
            // Wait flash busy done (wip=0)
            SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);
            pbuf += 4;
            address += 4;
            len -= 4;
        }
    }

    if (len > 0) {
        write_word = HAL_READ32(SPI_FLASH_BASE, address);
        ptr = (uint8_t*)&write_word;
        for (i=0;i<len;i++) {
            *(ptr+i) = *pbuf;
            pbuf++;
        }
        //Write word
        HAL_WRITE32(SPI_FLASH_BASE, address, write_word);
        // Wait spic busy done
        SpicWaitBusyDoneRtl8195A();
        // Wait flash busy done (wip=0)
        SpicWaitWipDoneRefinedRtl8195A(obj->SpicInitPara);
    }

    SpicDisableRtl8195A();
    return 1;
}