rt-thread-official/bsp/swm320/drivers/drv_nor_flash.c

/*
 * Copyright (c) 2006-2018, Synwit Technology Co.,Ltd.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-05-31     ZYH          first version
 * 2018-12-10     Zohar_Lee    format file
 * 2020-07-10     lik          rewrite
 */

#include "drv_nor_flash.h"

#ifdef BSP_USING_NOR_FLASH

#define DRV_DEBUG
#define LOG_TAG "drv.norflash"
#include <drv_log.h>

static struct rt_mutex flash_lock;

/* RT-Thread MTD device interface */
static long swm_norflash_read_id(struct rt_mtd_nor_device *device)
{
    return 0xdeadbeef;
}

static rt_size_t swm_norflash_read(struct rt_mtd_nor_device *device,
                                   rt_off_t position,
                                   rt_uint8_t *data,
                                   rt_uint32_t size)
{
    rt_mutex_take(&flash_lock, RT_WAITING_FOREVER);
    memcpy(data, ((const void *)(NORFLM_BASE + position)), size);
    rt_mutex_release(&flash_lock);
    return size;
}

static rt_size_t swm_norflash_write(struct rt_mtd_nor_device *device,
                                    rt_off_t position,
                                    const rt_uint8_t *data,
                                    rt_uint32_t size)
{
    rt_size_t i;
    const rt_uint16_t *hwdata = (const rt_uint16_t *)data;
    rt_mutex_take(&flash_lock, RT_WAITING_FOREVER);
    for (i = 0; i < size / 2; i++)
    {
        NORFL_Write(position, hwdata[i]);
        position += 2;
    }
    rt_mutex_release(&flash_lock);
    return size;
}

static rt_err_t swm_norflash_erase_block(struct rt_mtd_nor_device *device,
                                         rt_off_t offset,
                                         rt_uint32_t length)
{
    rt_mutex_take(&flash_lock, RT_WAITING_FOREVER);
    NORFL_SectorErase(offset);
    rt_mutex_release(&flash_lock);
    return RT_EOK;
}

const static struct rt_mtd_nor_driver_ops mtd_ops =
    {
        swm_norflash_read_id,
        swm_norflash_read,
        swm_norflash_write,
        swm_norflash_erase_block};

static struct rt_mtd_nor_device mtd;
int rt_hw_norflash_init(void)
{
    NORFL_InitStructure NORFL_InitStruct;

    PORT->PORTP_SEL0 = 0xAAAAAAAA; //PP0-23 => ADDR0-23
    PORT->PORTP_SEL1 = 0xAAAA;

    PORT->PORTM_SEL0 = 0xAAAAAAAA; //PM0-15 => DATA15-0
    PORT->PORTM_INEN = 0xFFFF;

    PORT->PORTM_SEL1 = 0xAAA; //PM16 => OEN、PM17 => WEN、PM18 => NORFL_CSN、PM19 => SDRAM_CSN、PM20 => SRAM_CSN、PM21 => SDRAM_CKE

    NORFL_InitStruct.DataWidth = 16;
    NORFL_InitStruct.WELowPulseTime = 5;
    NORFL_InitStruct.OEPreValidTime = 12;
    NORFL_InitStruct.OperFinishIEn = 0;
    NORFL_InitStruct.OperTimeoutIEn = 0;
    NORFL_Init(&NORFL_InitStruct);

    /* set page size and block size */
    mtd.block_size = BLOCK_SIZE; /* 64kByte */
    mtd.ops = &mtd_ops;

    /* initialize mutex */
    if (rt_mutex_init(&flash_lock, "nor", RT_IPC_FLAG_PRIO) != RT_EOK)
    {
        rt_kprintf("init sd lock mutex failed\n");
        return -RT_ERROR;
    }
    mtd.block_start = 0;
    mtd.block_end = BLOCK_COUNTER;

    /* register MTD device */
    rt_mtd_nor_register_device("nor", &mtd);
    return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_norflash_init);

#endif /* BSP_USING_NOR_FLASH */