SPINAND_ID
时间: 2023-10-21 20:07:08 浏览: 39
SPINAND_ID是指SPI NAND Flash的ID,用于识别和区分不同型号的SPI NAND Flash。在引用中提到了修改SPINAND_ID的情况,通过修改代码中的flash型号和dummy值等参数,可以实现对不同型号SPI NAND Flash的支持和兼容。同时,根据手册中的定义,不同接口的dummy值也有所不同,需要根据具体情况进行计算和填写。
相关问题
spi nand flash 驱动代码
以下是一个简单的SPI NAND Flash驱动代码的示例,基于Linux内核的MTD框架:
```
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/spi/spi.h>
#define SPI_NAND_CMD_READ 0x03
#define SPI_NAND_CMD_READID 0x9F
#define SPI_NAND_CMD_RESET 0xFF
#define SPI_NAND_PAGE_SIZE 2048
#define SPI_NAND_BLOCK_SIZE (64 * 1024)
#define SPI_NAND_CHIP_SIZE (1024 * 1024 * 8)
struct spi_nand_chip {
struct mtd_info mtd;
struct spi_device *spi;
u8 *buf;
};
static int spi_nand_read_buf(struct spi_nand_chip *chip, u32 addr, u8 *buf, u32 len)
{
u8 cmd[4];
int ret;
cmd[0] = SPI_NAND_CMD_READ;
cmd[1] = addr >> 16;
cmd[2] = addr >> 8;
cmd[3] = addr;
ret = spi_write_then_read(chip->spi, cmd, sizeof(cmd), buf, len);
if (ret < 0) {
dev_err(&chip->spi->dev, "SPI NAND read error: %d\n", ret);
return ret;
}
return 0;
}
static int spi_nand_read_id(struct spi_nand_chip *chip)
{
u8 cmd = SPI_NAND_CMD_READID;
u8 id[5];
int ret;
ret = spi_write_then_read(chip->spi, &cmd, sizeof(cmd), id, sizeof(id));
if (ret < 0) {
dev_err(&chip->spi->dev, "SPI NAND read ID error: %d\n", ret);
return ret;
}
dev_info(&chip->spi->dev, "SPI NAND ID: %02x %02x %02x %02x %02x\n",
id[0], id[1], id[2], id[3], id[4]);
return 0;
}
static int spi_nand_probe(struct spi_device *spi)
{
struct spi_nand_chip *chip;
struct mtd_info *mtd;
int ret;
chip = devm_kzalloc(&spi->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->buf = devm_kmalloc(&spi->dev, SPI_NAND_PAGE_SIZE, GFP_KERNEL);
if (!chip->buf)
return -ENOMEM;
mtd = &chip->mtd;
mtd->name = "spi-nand";
mtd->type = MTD_NANDFLASH;
mtd->flags = MTD_CAP_NANDFLASH;
mtd->writesize = SPI_NAND_PAGE_SIZE;
mtd->erasesize = SPI_NAND_BLOCK_SIZE;
mtd->size = SPI_NAND_CHIP_SIZE;
mtd->_erase = nand_erase;
mtd->_read = nand_read;
ret = spi_setup(spi);
if (ret)
return ret;
chip->spi = spi;
ret = spi_nand_read_id(chip);
if (ret)
return ret;
return mtd_device_register(mtd, NULL, 0);
}
static int spi_nand_remove(struct spi_device *spi)
{
struct mtd_info *mtd = spi_get_drvdata(spi);
mtd_device_unregister(m
Device Type is [SPINAND] Unknown flash (E7-80) Can't Find the Device Type !! detected: UNKNOWN(FFFF) Old-style Chip ID: 0xFFFFFFFF
这个问题看起来是关于设备类型的识别问题。根据你提供的信息,设备类型被识别为未知(UNKNOWN)。可能是因为设备类型不在系统的设备类型列表中,或者设备识别算法无法正确识别该设备类型。
为了解决这个问题,你可以尝试以下步骤:
1. 检查设备连接:确保设备正确连接到系统,并且连接是稳定可靠的。
2. 更新设备驱动程序:查找设备的最新驱动程序,并确保将其安装在系统上。
3. 搜索相关文档:查找设备的用户手册、技术规格或厂商支持文档,以获取更多关于设备类型识别的信息。
4. 联系厂商支持:如果以上步骤都无法解决问题,建议联系设备的制造商或技术支持团队,向他们咨询该设备类型的识别问题。
希望以上提示对解决你的问题有所帮助!如果你有其他问题,请随时提问。