AM3352 NAND Flash无法保存环境变量的问题

大家好，我的板子是AM3352，NAND Flash启动，但是发现在uboot执行saveenv时无法保存环境变量，擦除flash失败，提示：Attempt to erase non block-aligned data ，看了一下源码是在int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts)函数时出错，如下：

if ((opts->offset & (meminfo->erasesize – 1)) != 0) {
printf("Attempt to erase non block-aligned data\n");
return -1;
}

打印信息如下：

U-Boot 2016.05-00304-gad06f64-dirty (Aug 18 2017 – 18:57:40 +0800)CPU : AM335X-GP rev 2.1Model: TI AM335x HXDW Watchdog enabledI2C: readyDRAM: 256 MiBNAND: 256 MiBMMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1*** Error – No Valid Environment Area found*** Warning – bad CRC, using default environment<ethaddr> not set. Validating first E-fuse MACNet: Could not get PHY for ethernet@4a100000: addr 0eth0: ethernet@4a100000Warning: usb_ether MAC addresses don't match:Address in SROM is de:ad:be:ef:00:01Address in environment is 84:eb:18:bd:a8:9e, eth1: usb_etherPress SPACE to abort autoboot in 2 secondsuboot:/>saveenvSaving Environment to NAND…Erasing redundant NAND…Attempt to erase non block-aligned dataErasing NAND…Attempt to erase non block-aligned datauboot:/>

分区如下：

uboot:/>mtddevice nand0 <nand.0>, # parts = 10 #: name size offset mask_flags 0: NAND.SPL 0x00020000 0x00000000 0 1: NAND.SPL.backup1 0x00020000 0x00020000 0 2: NAND.SPL.backup2 0x00020000 0x00040000 0 3: NAND.SPL.backup3 0x00020000 0x00060000 0 4: NAND.u-boot-spl-os 0x00040000 0x00080000 0 5: NAND.u-boot 0x00100000 0x000c0000 0 6: NAND.u-boot-env 0x00020000 0x001c0000 0 7: NAND.u-boot-env.backup10x00020000 0x001e0000 0 8: NAND.kernel 0x00800000 0x00200000 0 9: NAND.file-system 0x0f600000 0x00a00000 0active partition: nand0,0 – (NAND.SPL) 0x00020000 @ 0x00000000defaults:mtdids : nand0=nand.0mtdparts: mtdparts=nand.0:128k(NAND.SPL),128k(NAND.SPL.backup1),128k(NAND.SPL.ba
ckup2),128k(NAND.SPL.backup3),256k(NAND.u-boot-spl-os),1m(NAND.u-boot),128k(NAND
.u-boot-env),128k(NAND.u-boot-env.backup1),8m(NAND.kernel),-(NAND.file-system)uboot:/>

Eggsy Pang：

看一下：

https://e2e.ti.com/support/arm/sitara_arm/f/791/p/593562/2183742?tisearch=e2e-sitesearch&keymatch=Attempt to erase non block-aligned data#2183742

Zhihua Zhang：

回复 Eggsy Pang:

Hi,Pang,

    我和这篇帖子遇到了同样的问题，但是里面好像没给出解决方案

Zhihua Zhang：

回复 Eggsy Pang:

查了之后发现env_nand.c的如下函数：

static int erase_and_write_env(const struct env_location *location, u_char *env_new){ int ret = 0;

printf("Erasing %s…\n", location->name); if (nand_erase_opts(&nand_info[0], &location->erase_opts)) return 1;

printf("Writing to %s… ", location->name); ret = writeenv(location->erase_opts.offset, env_new); puts(ret ? "FAILED!\n" : "OK\n");

return ret;}

这里的nand_info[0]为空，参数打印了一下发现nand_info[0]的值如下：

name = <NULL>,index=0,size= 0,erasesize=0

但是我直接使用nand erase 0x1c0000 0x20000擦除flash时又能够擦除成功

NAND erase: device 0 offset 0x1c0000, size 0x20000 opts->offset = 1835008,opts->length = 131072,meminfo->erasesize = 131072 Erasing at 0x1c0000 — 100% complete. OK

这是什么原因呢？

这个nand_info是什么时候初始化的呢？

Zhihua Zhang：

回复 Zhihua Zhang:

问题解决了，重新获取一下nandinfo，如下：

nand_info_t *nand;

nand = get_nand_dev_by_index(0);

但是不明白为什么原来的nand_info[0]会没有值!!!!!!!!!!!

Eggsy Pang：

回复 Zhihua Zhang:

在(drivers\mtd\nand\Nand.c)，在函数nand_init_chip（）里面 

HG：

回复 Zhihua Zhang:

板级初始化不正确，nand flash配置错误。

user1746898：

回复 Zhihua Zhang:

遇到同样的问题，看了下源码drivers/mtd/nand/nand.c

#ifndef CONFIG_DM_NAND
nand_info_t *get_nand_dev_by_index(int dev)
{if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE ||!nand_info[dev].name) {puts("No such device\n");return NULL;}return &nand_info[dev];
}
#endif

使用这个函数要取消定义宏CONFIG_DM_NAND

uboot配置里面取消宏CONFIG_DM_NAND，环境变量可正常操作，包括SPL和uboot

yongqing wang：

回复 user1746898:

初始化不正确