2021年08月26日 | 初试mini2440 nandflash驱动移植

首先按照步骤修改相关信息之后执行make zImage出现了不少错误： 
其中有代表性的错误如下： 

arch/arm/mach-s3c2440/mach-mini2440.c:189: error: array type has incomplete element type 
arch/arm/mach-s3c2440/mach-mini2440.c:190: error: array index in non-array initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:190: error: (near initialization for 'smdk_default_nand_part') 
arch/arm/mach-s3c2440/mach-mini2440.c:191: error: field name not in record or union initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:191: error: (near initialization for 'smdk_default_nand_part')

arch/arm/mach-s3c2440/mach-mini2440.c:193: error: unknown field 'tacls' specified in initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:193: warning: excess elements in struct initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:193: warning: (near initialization for 'mini2440_nand_info') 
arch/arm/mach-s3c2440/mach-mini2440.c:194: error: unknown field 'twrph0' specified in initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:194: warning: excess elements in struct initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:194: warning: (near initialization for 'mini2440_nand_info') 
arch/arm/mach-s3c2440/mach-mini2440.c:195: error: unknown field 'twrph1' specified in initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:195: warning: excess elements in struct initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:195: warning: (near initialization for 'mini2440_nand_info') 
arch/arm/mach-s3c2440/mach-mini2440.c:196: error: unknown field 'nr_sets' specified in initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:196: warning: type defaults to 'int' in declaration of 'type name' 
arch/arm/mach-s3c2440/mach-mini2440.c:196: warning: type defaults to 'int' in declaration of 'type name' 
arch/arm/mach-s3c2440/mach-mini2440.c:196: error: negative width in bit-field '' 
arch/arm/mach-s3c2440/mach-mini2440.c:196: warning: excess elements in struct initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:196: warning: (near initialization for 'mini2440_nand_info') 
arch/arm/mach-s3c2440/mach-mini2440.c:197: error: unknown field 'sets' specified in initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:197: warning: excess elements in struct initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:197: warning: (near initialization for 'mini2440_nand_info') 
arch/arm/mach-s3c2440/mach-mini2440.c:198: error: unknown field 'ingnore_unset_ecc' specified in initializer 
arch/arm/mach-s3c2440/mach-mini2440.c:198: warning: excess elements in struct initializer

开始以为是输错代码，搞了一个上午都没有搞明白。 

到了下午，通过查找网上的资料（还真难找），再对比原来2.6.32内核中外国爱好者编写的mach－mini2440.c 

文件，隐约知道是头文件的问题。 

于是在自己的mach－mini2440.c中加入 
#include <linux/mtd/mtd.h> 
#include  
#include  
#include  
#include  
果然make过了，不过仍然有一行warning： 
arch/arm/mach-s3c2440/mach-mini2440.c:233: warning: 'mini2440_nand_info' defined but not used 

把生成的zImage下载到板子上运行，也没有出现该文中所描述的情形，初步估计还是移植失败 

看来该文漏洞不少，这次不得不依靠网上的高手了。

昨天的问题 
warning: 'mini2440_nand_info' defined but not used 
今日终于还是解决了，原来除了昨天说 
的之外还得添加别的东西，在这个函数： 
static void __init mini2440_map_io(void) 
{ 
} 
中加入以下代码： 
s3c_device_nand.dev.platform_data = &mini2440_nand_info; 
再次make zImage，没有再出现warning，下载到板子， 成功出现了nand flash的分区信息。 

当然网上还有所谓的"石器时代"的移植方法，迟下再 试，毕竟这里头很多内在原理还是没搞明白的。当下先对文 件系统的移植作个了解，过一阵子再回过头来详细分析。 

我对这两天的移植有2个感受：一是"尽信书不如无书"， 二是不学一些原始的方法，单是站在巨人的肩上去开发是 学不透彻的，虽然移植成功但是还是糊里糊涂。。。。。。