mini6410移植全攻略（11）--linux2.6.39 移植之支持nand flash （上） .
mini6410移植全攻略（11）--linux2.6.39 移植之支持nand flash （上） .
本文由muge0913編寫，希望給嵌入開發者帶來一些幫助，並希望能和大家交流技術，若有不對的地方，或有更好的方法請指出。
轉載請註明出處：http://blog.csdn.net/muge0913/article/details/7242620
一、修改arch/arm/mach-s3c64xx/mach-th6410.c文件
1)註冊platform設備(nand)。
在static struct platform_device *th6410_devices[]__initdata中加入：
view plaincopyprint?01.&samsung_asoc_dma,
02.#if 0
03. &s3c64xx_device_iisv4,
04. &samsung_device_keypad,
05.#endif
06.//muge0913 add it
07. &s3c_device_nand,
08.#ifdef CONFIG_REGULAT
&samsung_asoc_dma,
#if 0
&s3c64xx_device_iisv4,
&samsung_device_keypad,
#endif
//muge0913 add it
&s3c_device_nand,
#ifdef CONFIG_REGULAT 註：關於nandflash平台設備更多知識在arch/arm/plat-samsung/dev-nand.c和arch/arm/plat-samsung/include/plat/nand.h以及arch/arm/plat-samsung/include/plat/regs-nand.hdev-nand.c：定義了nand平台設備、nand平台設備所需資源、平台的一些數據信息等。nand.h：定義了晶元本身相關的信息、bsp對nandflash的一些時序設置信息等。regs-nand.h：CPU中NANDFLASH各種寄存器的定義。
2)添加分區、時序等
view plaincopyprint?01./*
02. * Configuring Nandflash on TH6410
03. */
04.vi arch/arm/mach-s3c64xx/mach-th6410.c
05.
06.第117行
07.
08.struct mtd_partition mini6410_nand_part[] = {
09.
10. {
11.
12. .name = "Bootloader",
13.
14. .offset = 0,
15.
16. .size = (4 * 128 *SZ_1K),
17.
18. .mask_flags = MTD_CAP_NANDFLASH,
19.
20. },
21.
22. {
23.
24. .name = "Kernel",
25.
26. .offset = (4 * 128 *SZ_1K),
27.
28. .size = (5*SZ_1M) ,
29.
30. .mask_flags = MTD_CAP_NANDFLASH,
31.
32. },
33.
34. {
35.
36. .name = "File System",
37.
38. .offset = MTDPART_OFS_APPEND,
39.
40. .size = MTDPART_SIZ_FULL,
41.
42. }
43.
44.};
/*
* Configuring Nandflash on TH6410
*/
vi arch/arm/mach-s3c64xx/mach-th6410.c
第117行
struct mtd_partition mini6410_nand_part[] = {
{
.name = "Bootloader",
.offset = 0,
.size = (4 * 128 *SZ_1K),
.mask_flags = MTD_CAP_NANDFLASH,
},
{
.name = "Kernel",
.offset = (4 * 128 *SZ_1K),
.size = (5*SZ_1M) ,
.mask_flags = MTD_CAP_NANDFLASH,
},
{
.name = "File System",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
}
}; 3)向內核註冊信息。
在static void __init th6410_machine_init(void)函數中，添加如下代碼：
view plaincopyprint?01.//muge0913 add codes here
02.
03.#ifdefCONFIG_MTD_NAND_S3C
04.
05.s3c_device_nand.name = "s3c6410-nand";
06.
07.#endif
08.
09. s3c_nand_set_platdata(&th6410_nand_info);
//muge0913 add codes here
#ifdefCONFIG_MTD_NAND_S3C
s3c_device_nand.name = "s3c6410-nand";
#endif
s3c_nand_set_platdata(&th6410_nand_info);二、修改s3c_nand.c文件
其實該文件開源的百度即有。可以查看已修好的s3c_nand.c文件。
1)修改drivers/mtd/nand/目錄下的KconfigKconfig：添加下面部分
view plaincopyprint?01.configMTD_NAND_S3C2410_HWECC
02. bool "Samsung S3C NAND Hardware ECC"
03. depends on MTD_NAND_S3C2410
04. help
05. Enable the use of the controller's internal ECCgenerator when
06. using NAND. Early versions of the chips have hadproblems with
07. incorrect ECC generation, and if using these, thedefault of
08. software ECC is preferable.
09.
10.config MTD_NAND_S3C
11. tristate "NAND Flash support for S3C SoC"
12. depends on (ARCH_S3C64XX || ARCH_S5P64XX || ARCH_S5PC1XX)&& MTD_NAND
13. help
14. This enables the NAND flash controller on the S3C.
15. No board specfic support is done by this driver, eachboard
16. must advertise a platform_device for the driver toattach.
17.config MTD_NAND_S3C_DEBUG
18. bool "S3C NAND driver debug"
19. depends on MTD_NAND_S3C
20. help
21. Enable debugging of the S3C NAND driver
22.config MTD_NAND_S3C_HWECC
23. bool "S3C NAND Hardware ECC"
24. depends on MTD_NAND_S3C
25. help
26. Enable the use of the S3C's internal ECC generatorwhen
27. using NAND. Early versions of the chip have hadproblems with
28. incorrect ECC generation, and if using these, the defaultof
29. software ECC is preferable.
30. If you lay down a device with the hardware ECC, thenyou will
31. currently not be able to switch to software, as thereis no
32. implementation for ECC method used by the S3C
33.config MTD_NAND_NDFC
34. tristate "NDFC NanD Flash Controller"
35. depends on 4xx
36. select MTD_NAND_ECC_SMC
37. help
38. NDFC Nand Flash Controllers are integrated in IBM/AMCC's4xx SoCs
configMTD_NAND_S3C2410_HWECC
bool "Samsung S3C NAND Hardware ECC"
depends on MTD_NAND_S3C2410
help
Enable the use of the controller's internal ECCgenerator when
using NAND. Early versions of the chips have hadproblems with
incorrect ECC generation, and if using these, thedefault of
software ECC is preferable.
config MTD_NAND_S3C
tristate "NAND Flash support for S3C SoC"
depends on (ARCH_S3C64XX || ARCH_S5P64XX || ARCH_S5PC1XX)&& MTD_NAND
help
This enables the NAND flash controller on the S3C.
No board specfic support is done by this driver, eachboard
must advertise a platform_device for the driver toattach.
config MTD_NAND_S3C_DEBUG
bool "S3C NAND driver debug"
depends on MTD_NAND_S3C
help
Enable debugging of the S3C NAND driver
config MTD_NAND_S3C_HWECC
bool "S3C NAND Hardware ECC"
depends on MTD_NAND_S3C
help
Enable the use of the S3C's internal ECC generatorwhen
using NAND. Early versions of the chip have hadproblems with
incorrect ECC generation, and if using these, the defaultof
software ECC is preferable.
If you lay down a device with the hardware ECC, thenyou will
currently not be able to switch to software, as thereis no
implementation for ECC method used by the S3C
config MTD_NAND_NDFC
tristate "NDFC NanD Flash Controller"
depends on 4xx
select MTD_NAND_ECC_SMC
help
NDFC Nand Flash Controllers are integrated in IBM/AMCC's4xx SoCs 2) 修改Makfile告知內核編譯s3c_nand.c
Makefile：添加下面部分
view plaincopyprint?
01.obj-$(CONFIG_MTD_NAND_S3C) += s3c_nand.o
obj-$(CONFIG_MTD_NAND_S3C) += s3c_nand.o改好后保存退出
三、 當然drivers/mtd/nand/s3c_nand_mlc.fo
也要拷貝過來，這是友善沒有開源的一個驅動之一，所以不用研究了，拷過來就是了。
四、修改drivers/mtd/nand/nand_base.c文件
直接將drivers/mtd/nand/nand_base.c拷過來覆蓋就可以了。
五、編譯內核
然後再1)make menuconfig
Device Drivers--->
<*> Memory Technology Device(MTD) support --->
[*] MTD partitioning support
[*] Command line partition table parsing
<*> Direct char device access to MTD devices
<*> Caching block device access to MTD devices
<*> NAND Device Support --->
< > NAND Flash support forSamsung S3C SoCs 去掉不要選
<*> NAND Flash support for S3C SoC
[*] S3C NAND Hardware ECC
2)make zImage
《解決方案》
謝謝分享
《解決方案》
參觀參觀
sfp
《解決方案》
其實我很想知道它的那個沒開源驅動，自己寫裸板是在不方便
《解決方案》
不要和我比懶,我懶得和你比
頂上去
signature..................................
仙府之緣
