代码上传到github上:https://github.com/qiaoyuguo/u-boot-2014.04-mini2440
前几篇博文: 《mini2440移植uboot 2014.04(一)》
(九)修改nand flash代码错误(代码中一些错误修正):
用tftp将uboot加载到mini2440,然后nand erase擦除nand flash,然后再用nand write写入到nand flash后,重新加载uboot,结果又出现了下面的错误(前面已经出现过一次):
Flash: fwc addr 00000000 cmd f0 00f0 16bit x 16 bit fwc addr 0000aaaa cmd aa 00aa 16bit x 16 bit fwc addr 00005554 cmd 55 0055 16bit x 16 bit fwc addr 0000aaaa cmd 90 0090 16bit x 16 bit fwc addr 00000000 cmd f0 00f0 16bit x 16 bit JEDEC PROBE: ID f0 ffff 0 fwc addr 00000000 cmd ff 00ff 16bit x 16 bit fwc addr 00000000 cmd 90 0090 16bit x 16 bit fwc addr 00000000 cmd ff 00ff 16bit x 16 bit JEDEC PROBE: ID 90 ffff 0 *** failed *** ### ERROR ### Please RESET the board ###
如果将include/configs/mini2440.h中的#define DEBUG注释掉,显示信息如下:
U-Boot 2014.04-gb749c10-dirty (Jun 06 2014 - 09:20:31) CPUID: 32440001 FCLK: 405 MHz HCLK: 101.250 MHz PCLK: 50.625 MHz DRAM: 64 MiB WARNING: Caches not enabled Flash: *** failed *** ### ERROR ### Please RESET the board ###
再次出现了无法检测nor flash的情况.
暂时先将官方uboot烧写到开发板(先擦除整个nand flash,然后烧写官方uboot)。
然后打开三个控制台,一个执行"sudo minicom",另一个执行"openocd -f interface/jlink.cfg -f board/mini2440.cfg",最后一个控制台执行下面内容:
telnet localhost 4444
reset
init_2440
nand probe 0
nand erase 0
nand write 0 /home/host/soft/mini2440/u-boot/u-boot.bin 0
reset
在minicom所在控制台上可以正常显示和进入uboot。
执行nand write命令需要很长时间,下面是执行该命令的输出信息:
wrote file /home/host/soft/mini2440/u-boot/u-boot.bin to NAND flash 0 up to offset 0x00038800 in 706.817383s (0.320 Ki/s)
231KB的文件足足花了十多分钟,我差点以为telnet命令挂掉了。
修改下面代码(drivers/mtd/nand/s3c2410_nand.c):
#if defined(CONFIG_S3C2440) if (ctrl & NAND_NCE) - writel(readl(&nand->nfconf) & ~S3C2410_NFCONT_nFCE, - &nand->nfconf); + + &nand->nfcont); else - writel(readl(&nand->nfconf) | S3C2410_NFCONT_nFCE, - &nand->nfconf); + writel(readl(&nand->nfcont) | S3C2410_NFCONT_nFCE, + &nand->nfcont); }
#if defined(CONFIG_S3C2440)
- writel(readl(&nand->nfconf) | S3C2410_NFCONT_INITECC, &nand->nfconf);
+ writel(readl(&nand->nfcont) | S3C2410_NFCONT_INITECC, &nand->nfcont);
#endif
'-'号表示需要删除的代码行,'+'号表示需要添加的代码行。
修改代码后重新编译:
make CROSS_COMPILE=arm-linux-
执行下面命令加载uboot文件:
reset
init_2440
load_image /home/host/soft/mini2440/u-boot-2014.04/u-boot.bin 0x33e80000 bin
resume 0x33e80000
在minicom中得到下面输出信息后就重启系统了:
U-Boot 2014.04-gb749c10-dirty (Jun 30 2014 - 09:51:24) U-Boot code: 33E80000 -> 33EFA3D8 BSS: -> 33F48ED0 CPUID: 32440001 FCLK: 405 MHz HCLK: 101.250 MHz PCLK: 50.625 MHz monitor len: 000C8ED0 ramsize: 04000000 TLB table from 33ff0000 to 33ff4000 Top of RAM usable for U-Boot at: 33ff0000 Reserving 803k for U-Boot at: 33f27000 Reserving 4160k for malloc() at: 33b17000 Reserving 32 Bytes for Board Info at: 33b16fe0 Reserving 160 Bytes for Global Data at: 33b16f40 New Stack Pointer is: 33b16f30 RAM Configuration: Bank #0: 30000000 64 MiB addr=33f27000,_start=33e80000 relocation Offset is: 000a7000 WARNING: Caches not enabled monitor flash len: 00084CF8 dram_bank_mmu_setup: bank: 0 Now running in RAM - U-Boot at: 33f27000
将include/configs/mini2440.h中CONFIG_SYS_TEXT_BASE修改为0x33E00000:
#define CONFIG_SYS_TEXT_BASE 0x33E00000
重新编译后,加载到系统中:
reset
init_2440
load_image /home/host/soft/mini2440/u-boot-2014.04/u-boot.bin 0x33e00000 bin
resume 0x33e00000
可以正常进入uboot(输出信息太长了,不再列出)。
在uboot下执行下面命令(需要查看md和nand dump输出内容是否一致):
nand read 0 0 0x100 nand dump 0 0x100 md 0
查看二者输出可以看到,二者输出信息是一致的(只是md的输出信息使用小端法表示,会有点难以比对)
再执行下面命令:
nand erase 0x100000 0x100000
nand dump 0x100000 0x100
nand write 0 0x100000 0x100
nand dump 0x100000 0x100
两次dump的信息一致,但是都是ff,这说明nand write并没有真正把数据写入到nand flash中。
参考《u-boot移植到mini2440,u-boot版本2008.10 》默认不会对写入进行校验,需要添加CONFIG_MTD_NAND_VERIFY_WRITE才能进行校验
在include/configs/mini2440中添加一行代码:
#define CONFIG_MTD_NAND_VERIFY_WRITE
重新编译uboot,并按照上面步骤载入并进入uboot.
然后执行nand write命令:
MINI2440 # nand write 0 0x100000 0x100 NAND write: device 0 offset 0x100000, size 0x100 hwcontrol(): 0x70 0x83 hwcontrol(): 0xffffffff 0x81 hwcontrol(): 0x80 0x83 hwcontrol(): 0x00 0x85 hwcontrol(): 0x00 0x05 hwcontrol(): 0x200 0x05 hwcontrol(): 0x02 0x05 hwcontrol(): 0xffffffff 0x81 hwcontrol(): 0x10 0x83 hwcontrol(): 0xffffffff 0x81 hwcontrol(): 0x70 0x83 hwcontrol(): 0xffffffff 0x81 dev_ready hwcontrol(): 0x00 0x83 hwcontrol(): 0x00 0x85 hwcontrol(): 0x00 0x05 hwcontrol(): 0x200 0x05 hwcontrol(): 0x02 0x05 hwcontrol(): 0xffffffff 0x81 hwcontrol(): 0x30 0x83 hwcontrol(): 0xffffffff 0x81 dev_ready hwcontrol(): 0xffffffff 0x80 NAND write to offset 100000 failed -5 0 bytes written: ERROR
nand write执行失败。
修改drivers/mtd/nand/s3c2410_nand.c:
添加一行代码: ulong IO_ADDR_W = CONFIG_SYS_NAND_BASE; 删除两行代码: // struct nand_chip *chip = mtd->priv; // chip->IO_ADDR_W = (void *)IO_ADDR_W;
修改下面一行代码(chip->替换成(void *):
writeb(cmd, chip->IO_ADDR_W);
还有一行代码中ulong需要删除掉:
ulong IO_ADDR_W = (ulong)nand;
然后再次编译、加载、运行uboot,
在uboot下执行下面命令:
md 0 nand erase 0x100000 0x100 nand write 0 0x100000 0x100 nand dump 0x100000 0x100
最后一条命令显示信息如下:
hwcontrol(): 0x00 0x83 hwcontrol(): 0x00 0x85 hwcontrol(): 0x00 0x05 hwcontrol(): 0x200 0x05 hwcontrol(): 0x02 0x05 hwcontrol(): 0xffffffff 0x81 hwcontrol(): 0x30 0x83 hwcontrol(): 0xffffffff 0x81 dev_ready hwcontrol(): 0xffffffff 0x80 Page 00100000 dump: f0 00 00 ea 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 04 f0 9f e5 14 f0 9f e5 14 f0 9f e5 14 f0 9f e5 60 02 f8 33 c0 02 f8 33 20 03 f8 33 80 03 f8 33 e0 03 f8 33 40 04 f8 33 60 04 f8 33 ef be ad de 00 00 f8 33 00 00 f8 33 cc 87 fb 33 9c b5 ff 33 de c0 ad 0b de c0 ad 0b 00 00 0f e1 1f 00 c0 e3 d3 00 80 e3 00 f0 29 e1 53 04 a0 e3 00 10 a0 e3 00 10 80 e5 00 10 e0 e3 20 04 9f e5 00 10 80 e5 1c 14 9f e5 1c 04 9f e5 00 10 80 e5 18 04 9f e5 05 10 a0 e3 00 10 80 e5 10 1f 11 ee 03 11 81 e3 10 1f 01 ee 13 13 a0 e3 7f 2a a0 e3 21 20 82 e2 04 20 81 e5 5b 00 00 eb c0 00 4f e2 84 10 1f e5 01 00 50 e1 40 00 00 0a f1 11 a0 e3 00 00 a0 e3 00 00 81 e5 3c 10 a0 e3 00 00 91 e5 00 00 50 e3 2c 00 00 1a c4 03 9f e5 f1 11 a0 e3 00 00 81 e5 4e 14 a0 e3 b8 23 9f e5 00 20 81 e5 00 20 91 e5 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
.......................
后面还有一些输出信息,都是ff,此处我都将其省略了。