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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-05-16 shelton first version
*/
#include <rtthread.h>
#include "drv_common.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>
/**
* @brief gets the page of a given address
* @param addr: address of the flash memory
* @retval the page of a given address
*/
static rt_uint32_t get_page(uint32_t addr)
{
rt_uint32_t page = 0;
page = RT_ALIGN_DOWN(addr, FLASH_PAGE_SIZE);
return page;
}
/**
* @brief 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 at32_flash_read(rt_uint32_t addr, rt_uint8_t *buf, rt_uint32_t size)
{
rt_uint32_t i;
if ((addr + size) > AT32_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;
}
/**
* @brief 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 at32_flash_write(rt_uint32_t addr, const rt_uint8_t *buf, rt_uint32_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) > AT32_FLASH_END_ADDRESS)
{
LOG_E("write outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
flash_unlock();
while (addr < end_addr)
{
if (flash_word_program(addr, *((rt_uint32_t *)buf)) == FLASH_OPERATE_DONE)
{
if (*(rt_uint32_t *)addr != *(rt_uint32_t *)buf)
{
result = -RT_ERROR;
break;
}
addr += 4;
buf += 4;
}
else
{
result = -RT_ERROR;
break;
}
}
flash_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 at32_flash_erase(rt_uint32_t addr, rt_uint32_t size)
{
rt_err_t result = RT_EOK;
rt_uint32_t end_addr = addr + size;
rt_uint32_t page_addr = 0;
flash_unlock();
if ((end_addr) > AT32_FLASH_END_ADDRESS)
{
LOG_E("erase outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
while(addr < end_addr)
{
page_addr = get_page(addr);
if(flash_sector_erase(page_addr) != FLASH_OPERATE_DONE)
{
result = -RT_ERROR;
goto __exit;
}
addr += FLASH_PAGE_SIZE;
}
flash_lock();
__exit:
if(result != RT_EOK)
{
return result;
}
return size;
}
#if defined(RT_USING_FAL)
static int fal_flash_read(long offset, rt_uint8_t *buf, rt_uint32_t size);
static int fal_flash_write(long offset, const rt_uint8_t *buf, rt_uint32_t size);
static int fal_flash_erase(long offset, rt_uint32_t size);
const struct fal_flash_dev at32_onchip_flash =
{
"onchip_flash",
AT32_FLASH_START_ADRESS,
AT32_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, rt_uint32_t size)
{
return at32_flash_read(at32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_write(long offset, const rt_uint8_t *buf, rt_uint32_t size)
{
return at32_flash_write(at32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_erase(long offset, rt_uint32_t size)
{
return at32_flash_erase(at32_onchip_flash.addr + offset, size);
}
#endif
#endif /* BSP_USING_ON_CHIP_FLASH */
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