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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-03-28 luobeihai first version
*
*/
#include "board.h"
#ifdef BSP_USING_ON_CHIP_FLASH
#include "drv_flash.h"
#if defined(RT_USING_FAL)
#include "fal.h"
#endif
#define DRV_DEBUG
#define LOG_TAG "drv.flash"
#include <drv_log.h>
#if defined(APM32E10X_HD)
#define FLASH_PAGE_SIZE 0x800U
#endif
/**
* @brief Gets the page of a given address
* @param Addr: Address of the FLASH Memory
* @retval The page of a given address
*/
static uint32_t GetPage(uint32_t addr)
{
uint32_t page = 0;
page = RT_ALIGN_DOWN(addr, FLASH_PAGE_SIZE);
return page;
}
/**
* Read data from flash.
* @note This operation's units is word.
*
* @param addr flash address
* @param buf buffer to store read data
* @param size read bytes size
*
* @return result
*/
int apm32_flash_read(rt_uint32_t addr, rt_uint8_t *buf, size_t size)
{
size_t i;
if ((addr + size) > APM32_FLASH_END_ADDRESS)
{
LOG_E("read outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
for (i = 0; i < size; i++, buf++, addr++)
{
*buf = *(rt_uint8_t *) addr;
}
return size;
}
/**
* Write data to flash.
* @note This operation's units is word.
* @note This operation must after erase. @see flash_erase.
*
* @param addr flash address
* @param buf the write data buffer
* @param size write bytes size
*
* @return result
*/
int apm32_flash_write(rt_uint32_t addr, const rt_uint8_t *buf, size_t size)
{
rt_err_t result = RT_EOK;
rt_uint32_t end_addr = addr + size;
if (addr % 4 != 0)
{
LOG_E("write addr must be 4-byte alignment");
return -RT_EINVAL;
}
if ((end_addr) > APM32_FLASH_END_ADDRESS)
{
LOG_E("write outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
FMC_Unlock();
while (addr < end_addr)
{
if (FMC_ProgramWord(addr, *((rt_uint32_t *)buf)) == FMC_STATUS_COMPLETE)
{
if (*(rt_uint32_t *)addr != *(rt_uint32_t *)buf)
{
result = -RT_ERROR;
break;
}
addr += 4;
buf += 4;
}
else
{
result = -RT_ERROR;
break;
}
}
FMC_Lock();
if (result != RT_EOK)
{
return result;
}
return size;
}
/**
* @brief erase data on flash .
* @note this operation is irreversible.
* @note this operation's units is different which on many chips.
*
* @param addr flash address
* @param size erase bytes size
*
* @return result
*/
int apm32_flash_erase(rt_uint32_t addr, size_t size)
{
rt_err_t result = RT_EOK;
rt_uint32_t start_addr = addr;
rt_uint32_t end_addr = addr + size;
rt_uint32_t page_addr = 0;
FMC_Unlock();
if ((end_addr) > APM32_FLASH_END_ADDRESS)
{
LOG_E("erase outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
/* clear program error flag */
if (FMC_ReadStatus() == FMC_STATUS_ERROR_PG)
{
FMC_ClearStatusFlag(FMC_FLAG_PE);
}
while(addr < end_addr)
{
page_addr = GetPage(addr);
if(FMC_ErasePage(page_addr) != FMC_STATUS_COMPLETE)
{
result = -RT_ERROR;
goto __exit;
}
addr += FLASH_PAGE_SIZE;
}
__exit:
FMC_Lock();
if(result != RT_EOK)
{
return result;
}
LOG_D("erase done: addr (0x%p), size %d", (void *)start_addr, size);
return size;
}
#if defined(RT_USING_FAL)
static int fal_flash_read(long offset, rt_uint8_t *buf, size_t size);
static int fal_flash_write(long offset, const rt_uint8_t *buf, size_t size);
static int fal_flash_erase(long offset, size_t size);
const struct fal_flash_dev apm32_onchip_flash = { "onchip_flash", APM32_FLASH_START_ADRESS, APM32_FLASH_SIZE, FLASH_PAGE_SIZE, {NULL, fal_flash_read, fal_flash_write, fal_flash_erase} };
static int fal_flash_read(long offset, rt_uint8_t *buf, size_t size)
{
return apm32_flash_read(apm32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_write(long offset, const rt_uint8_t *buf, size_t size)
{
return apm32_flash_write(apm32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_erase(long offset, size_t size)
{
return apm32_flash_erase(apm32_onchip_flash.addr + offset, size);
}
#endif
#endif /* BSP_USING_ON_CHIP_FLASH */
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