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/*
* Copyright (C) 2022-2024, Xiaohua Semiconductor Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-04-28 CDT First version
* 2024-06-14 CDT Fixed sector number calculation
* 2024-06-18 CDT Support HC32F460,HC32F448,HC32F472
* 2025-07-16 CDT Support HC32F334
* 2026-05-27 CDT Support HC32F4A2
* 2026-06-03 CDT Support HC32F467
*/
#include "board.h"
#if defined(BSP_USING_ON_CHIP_FLASH)
#include "drv_config.h"
#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>
/**
* @brief Gets the sector number.
* @param addr flash address
* @param size erase bytes size
* @retval Sector number.
*/
static rt_uint32_t GetSectorNum(rt_uint32_t addr, size_t size)
{
rt_uint32_t firstSector = 0, lastSector = 0;
rt_uint32_t NumOfSectors = 0;
firstSector = addr / EFM_SECTOR_SIZE;
lastSector = (addr + size - 1U) / EFM_SECTOR_SIZE;
NumOfSectors = lastSector - firstSector + 1U;
return NumOfSectors;
}
/**
* @brief Read data from flash.
* @param addr flash address
* @param buf buffer to store read data
* @param size read bytes size
* @return result
*/
int hc32_flash_read(rt_uint32_t addr, rt_uint8_t *buf, size_t size)
{
if ((addr + size) > HC32_FLASH_END_ADDRESS)
{
LOG_E("read outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -1;
}
if (LL_OK != EFM_ReadByte(addr, buf, size))
{
return -RT_ERROR;
}
return size;
}
/**
* @brief Write data to flash.
* @param addr flash address
* @param buf the write data buffer
* @param size write bytes size
* @return result
* @note This operation's units is word.
* @note This operation must after erase.
*/
int hc32_flash_write(rt_uint32_t addr, const rt_uint8_t *buf, size_t size)
{
uint8_t u8MemBuf[HC32_FLASH_WRITE_GRANULARITY];
rt_err_t result = RT_EOK;
rt_uint32_t newAddr = addr, offsetVal = 0;
rt_uint32_t index = 0, u32Cnt = 0;
#if defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334) || defined(HC32F467)
rt_uint32_t FirstSector = 0, NumOfSectors = 0;
#endif
if ((addr + size) > HC32_FLASH_END_ADDRESS)
{
LOG_E("write outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
if (size < 1)
{
return -RT_EINVAL;
}
for (u32Cnt = 0; u32Cnt < HC32_FLASH_WRITE_GRANULARITY; u32Cnt++)
{
u8MemBuf[u32Cnt] = 0xFF;
}
/* EFM_FWMC write enable */
EFM_FWMC_Cmd(ENABLE);
#if defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334) || defined(HC32F467)
/* calculate sector information */
FirstSector = addr / EFM_SECTOR_SIZE,
NumOfSectors = GetSectorNum(addr, size);
/* Sectors disable write protection */
EFM_SequenceSectorOperateCmd(FirstSector, NumOfSectors, ENABLE);
#endif
/* Word align */
if (0U != (addr % HC32_FLASH_WRITE_GRANULARITY))
{
newAddr = (addr / HC32_FLASH_WRITE_GRANULARITY + 1U) * HC32_FLASH_WRITE_GRANULARITY;
offsetVal = newAddr - addr;
if (offsetVal >= size)
{
result = -RT_ERROR;
index = HC32_FLASH_WRITE_GRANULARITY - offsetVal;
if (LL_OK == EFM_ReadByte(newAddr - HC32_FLASH_WRITE_GRANULARITY, u8MemBuf, index))
{
for (u32Cnt = 0; u32Cnt < size; u32Cnt++)
{
u8MemBuf[index + u32Cnt] = buf[u32Cnt];
}
/* program */
if (LL_OK == EFM_Program(newAddr - HC32_FLASH_WRITE_GRANULARITY, u8MemBuf, HC32_FLASH_WRITE_GRANULARITY))
{
result = RT_EOK;
}
}
goto __exit;
}
else
{
size = size - offsetVal;
}
}
/* program */
if (LL_OK != EFM_Program(newAddr, (uint8_t *)&buf[offsetVal], size))
{
result = -RT_ERROR;
goto __exit;
}
__exit:
#if defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334) || defined(HC32F467)
/* Sectors enable write protection */
EFM_SequenceSectorOperateCmd(FirstSector, NumOfSectors, DISABLE);
#endif
EFM_FWMC_Cmd(DISABLE);
if (result != RT_EOK)
{
return result;
}
return size;
}
/**
* @brief Erase data on flash.
* @param addr flash address
* @param size erase bytes size
* @return result
* @note This operation is irreversible.
*/
int hc32_flash_erase(rt_uint32_t addr, size_t size)
{
rt_err_t result = RT_EOK;
rt_uint32_t NumOfSectors = 0;
rt_uint32_t SectorVal = 0, u32Addr = addr;
#if defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334) || defined(HC32F467)
rt_uint32_t FirstSector = 0;
#endif
if ((addr + size) > HC32_FLASH_END_ADDRESS)
{
LOG_E("ERROR: erase outrange flash size! addr is (0x%p)\n", (void *)(addr + size));
return -RT_EINVAL;
}
if (size < 1)
{
return -RT_EINVAL;
}
/* EFM_FWMC write enable */
EFM_FWMC_Cmd(ENABLE);
/* calculate sector information */
NumOfSectors = GetSectorNum(addr, size);
#if defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334) || defined(HC32F467)
FirstSector = addr / EFM_SECTOR_SIZE,
/* Sectors disable write protection */
EFM_SequenceSectorOperateCmd(FirstSector, NumOfSectors, ENABLE);
#endif
/* Erase sector */
for (SectorVal = 0U; SectorVal < NumOfSectors; SectorVal++)
{
if (LL_OK != EFM_SectorErase(u32Addr))
{
result = -RT_ERROR;
break;
}
u32Addr += EFM_SECTOR_SIZE;
}
#if defined(HC32F4A0) || defined(HC32F4A2) || defined(HC32F472) || defined(HC32F448) || defined(HC32F4A8) || \
defined(HC32F334) || defined(HC32F467)
/* Sectors enable write protection */
EFM_SequenceSectorOperateCmd(FirstSector, NumOfSectors, DISABLE);
#endif
EFM_FWMC_Cmd(DISABLE);
if (result != RT_EOK)
{
return result;
}
LOG_D("erase done: addr (0x%p), size %d", (void *)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 hc32_onchip_flash = {
.name = "onchip_flash",
.addr = HC32_FLASH_START_ADDRESS,
.len = HC32_FLASH_SIZE,
.blk_size = HC32_FLASH_ERASE_GRANULARITY,
.ops = { NULL, fal_flash_read, fal_flash_write, fal_flash_erase },
.write_gran = HC32_FLASH_WRITE_GRANULARITY
};
static int fal_flash_read(long offset, rt_uint8_t *buf, size_t size)
{
return hc32_flash_read(hc32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_write(long offset, const rt_uint8_t *buf, size_t size)
{
return hc32_flash_write(hc32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_erase(long offset, size_t size)
{
return hc32_flash_erase(hc32_onchip_flash.addr + offset, size);
}
#endif
#endif /* BSP_USING_ON_CHIP_FLASH */
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