linux 3.4.43 arm icache 移植,【银杏科技ARM+FPGA】分享iCore4T移植RT-Thread过程的点点滴滴...
/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-11-27 zylx first version
*/
#include
#include
#include
#include
#include
#ifdef BSP_USING_QSPI_FLASH
#include "spi_flash.h"
#include "spi_flash_sfud.h"
char w25qxx_read_status_register2(struct rt_qspi_device *device)
{
/* 0x35 read status register2 */
char instruction = 0x35, status;
rt_qspi_send_then_recv(device, &instruction, 1, &status, 1);
return status;
}
void w25qxx_write_enable(struct rt_qspi_device *device)
{
/* 0x06 write enable */
char instruction = 0x06;
rt_qspi_send(device, &instruction, 1);
}
void w25qxx_enter_qspi_mode(struct rt_qspi_device *device)
{
char status = 0;
/* 0x38 enter qspi mode */
char instruction = 0x38;
char write_status2_buf[2] = {0};
/* 0x31 write status register2 */
write_status2_buf[0] = 0x31;
status = w25qxx_read_status_register2(device);
if (!(status & 0x02))
{
status |= 1 << 1;
w25qxx_write_enable(device);
write_status2_buf[1] = status;
rt_qspi_send(device, &write_status2_buf, 2);
rt_qspi_send(device, &instruction, 1);
rt_kprintf("flash already enter qspi mode
");
rt_thread_mdelay(10);
}
}
static int rt_hw_qspi_flash_with_sfud_init(void)
{
stm32_qspi_bus_attach_device("qspi1", "qspi10", RT_NULL, 4, w25qxx_enter_qspi_mode, RT_NULL);
/* init w25q64 */
if (RT_NULL == rt_sfud_flash_probe("W25Q64", "qspi10"))
{
return -RT_ERROR;
}
return RT_EOK;
}
INIT_COMPONENT_EXPORT(rt_hw_qspi_flash_with_sfud_init);
#if defined(RT_USING_DFS_ELMFAT) && !defined(BSP_USING_SDCARD)
#include
#define BLK_DEV_NAME "W25Q64"
int mnt_init(void)
{
rt_thread_delay(RT_TICK_PER_SECOND);
if (dfs_mount(BLK_DEV_NAME, "/", "elm", 0, 0) == 0)
{
rt_kprintf("file system initialization done!
");
}
else
{
if(dfs_mkfs("elm", BLK_DEV_NAME) == 0)
{
if (dfs_mount(BLK_DEV_NAME, "/", "elm", 0, 0) == 0)
{
rt_kprintf("file system initialization done!
");
}
else
{
rt_kprintf("file system initialization failed!
");
}
}
}
return 0;
}
INIT_ENV_EXPORT(mnt_init);
#endif /* defined(RT_USING_DFS_ELMFAT) && !defined(BSP_USING_SDCARD) */
#endif /* BSP_USING_QSPI_FLASH */