u-boot-2012.04.01移植到TQ2440（三）：移植NOR FLASH

一、????移植NOR FLASH

去掉配置文件includeconfigstq2440.h中的宏并修改代码段基地址

#define CONFIG_SYS_TEXT_BASE 0x0

//#defineCONFIG_SKIP_LOWLEVEL_INIT

在boardtq2440lowlevel_init.S修改SDRAM’刷新频率

#define REFCNT???????????????????? 0x4f4

该文件中的这三条指令其实可以用一条指令替换adrl r0,SMRDATA

ldr???? r0,=SMRDATA

ldr??? r1,_TEXT_BASE

sub? r0,r0,r1

进入/drivers/mtd/cfi_flash.c中的flash_init()函数

在该文件开头定义宏DEBUG打开调试信息

#define DEBUG 1

#define _DEBUG???? 1

重新编译

用原先的u-boot从NOR FLASH启动，将新u-boot.bin烧到NOR FLASH

TQ2440 # tftp 32000000u-boot.bin

dm9000 i/o: 0x20000000,id:0x90000a46

DM9000: running in 16 bitmode

MAC: 00:0c:29:4d:e4:f4

Using dm9000 device

TFTP from server172.28.12.60; our IP address is 172.28.12.10

Filename 'u-boot.bin'.

Load address: 0x32000000

Loading: T #############

done

Bytes transferred = 180828(2c25c hex)

TQ2440 # protect off all

Un-Protect Flash Bank # 1

TQ2440 # erase 0 +30000

?

...... done

Erased 6 sectors

TQ2440 # cp.b 32000000 030000

Copy to Flash...9....8....7....6....5....4....3....2....1....done

TQ2440 #

重启开发板

U-Boot 2012.04.01 (Dec 292012 - 14:25:05)

?

CPUID: 32440001

FCLK:????? 400 MHz

HCLK:????? 100 MHz

PCLK:?????? 50 MHz

DRAM:? 64 MiB

WARNING: Caches not enabled

Flash: fwc addr (null) cmdf0 00f0 16bit x 16 bit

fwc addr 0000aaaa cmd aa00aa 16bit x 16 bit

fwc addr 00005554 cmd 550055 16bit x 16 bit

fwc addr 0000aaaa cmd 900090 16bit x 16 bit

fwc addr (null) cmd f0 00f016bit x 16 bit

JEDEC PROBE: ID 1c2249 0

fwc addr (null) cmd ff 00ff16bit x 16 bit

fwc addr (null) cmd 90 009016bit x 16 bit

fwc addr (null) cmd ff 00ff16bit x 16 bit

JEDEC PROBE: ID 13 ea00 0

*** failed ***

### ERROR ### Please RESETthe board ###

搜索“JEDEC PROBE:”

? flash_read_jedec_ids(info);

?????????????????????? debug("JEDECPROBE: ID %x %x %xn",

???????????????????????????????????? info->manufacturer_id,

???????????????????????????????????? info->device_id,

???????????????????????????????????? info->device_id2);

?????????????????????? if (jedec_flash_match(info,info->start[0]))

????????????????????????????? break;

?????????????????????? else

????????????????????????????? unmap_physmem((void*)info->start[0],

???????????????????????????????????? ????? MAP_NOCACHE);

driversmtdjedec_flash.c中的jedec_flash_match()函数：

/*-----------------------------------------------------------------------

?* match jedec ids against table. If a match isfound,fill flash_info entry

?*/

intjedec_flash_match(flash_info_t *info,ulong base)

{

? int ret = 0;

? int i;

? ulong mask = 0xFFFF;

? if (info->chipwidth == 1)

???????? mask = 0xFF;

?

? for (i = 0; i < ARRAY_SIZE(jedec_table); i++) {

???????? if ((jedec_table[i].mfr_id & mask) ==(info->manufacturer_id & mask) &&

???????? ???(jedec_table[i].dev_id & mask) == (info->device_id & mask)) {

??????????????? fill_info(info,&jedec_table[i],base);

??????????????? ret = 1;

??????????????? break;

???????? }

? }

? return ret;

}

flash_read_jedec_ids(info)读出了我们的开发板的NOR FLASH的厂商ID为0x1c,设备ID为0x2249

jedec_flash_match(info,info->start[0])将读出的信息与jedec_table[]数组进行匹配，如果有匹配成功则填充flashin信息并返回1，否则返回0。说明这里没有匹配成功，需要在jedec_table[]数组中添加我们自己开发板的NOR FLASH信息。

修改配置文件includeconfigstq2440.h

#defineCONFIG_SYS_FLASH_LEGACY_1024Kx16

在driversmtdjedec_flash.c文件中jedec_table[]数组中增加EN29LV160AB的配置根据芯片手册。

#ifdefCONFIG_SYS_FLASH_LEGACY_1024Kx16

??? /* TQ2440 EN29LV160AB */

??? {??

??????????? .mfr_id???? = 0x1c,? /* 厂商ID */

??????????? .dev_id???? = 0x2249,??/* 设备ID */

????????? ??.name??????= "EON EN29LV160AB",

??????????? .uaddr????? = {/* 因为NOR FLASH的ADDR0接到了S3C2440的ADDR1 */

??????????????? [1] = MTD_UADDR_0x0555_0x02AA/* x16 */

??????????? },?

??????????? .DevSize??? = SIZE_2MiB,

??????????? .CmdSet???? = P_ID_AMD_STD,

??? ????????.NumEraseRegions= 4,

??????????? .regions??? = {

??????????????? ERASEINFO(0x04000,1),

??????????????? ERASEINFO(0x02000,2),?

??????????????? ERASEINFO(0x08000,?

??????????????? ERASEINFO(0x10000,31),

??????????? }??

??????? },?

#endif

重新编译通过工具将u-boot.bin烧写到NOR FLASH

U-Boot 2012.04.01 (Dec 292012 - 15:26:09)

?

CPUID: 32440001

FCLK:????? 400 MHz

HCLK:????? 100 MHz

PCLK:?????? 50 MHz

DRAM:? 64 MiB

WARNING: Caches not enabled

Flash: fwc addr (null) cmdf0 00f0 16bit x 16 bit

fwc addr 0000aaaa cmd aa00aa 16bit x 16 bit

fwc addr 00005554 cmd 550055 16bit x 16 bit

fwc addr 0000aaaa cmd 900090 16bit x 16 bit

fwc addr (null) cmd f0 00f016bit x 16 bit

JEDEC PROBE: ID 1c 2249 0

ERROR: too manyflash sectors

2 MiB

*** Warning - bad CRC,usingdefault environment

?

In:??? serial

Out:?? serial

Err:?? serial

Net:?? No ethernet found.

TQ2440 #

出现一个错误ERROR: too many flash sectors

修改配置文件includeconfigstq2440.h

#defineCONFIG_SYS_MAX_FLASH_SECT (35)

取消调试信息driversmtdcfi_flash.c

//#define DEBUG??? 1

//#define _DEBUG? 1

重新编译

U-Boot 2012.04.01 (Dec 292012 - 15:33:09)

?

CPUID: 32440001

FCLK:????? 400 MHz

HCLK:????? 100 MHz

PCLK:?????? 50 MHz

DRAM:? 64 MiB

WARNING: Caches not enabled

Flash: 2 MiB

*** Warning - bad CRC,usingdefault environment

?

In:??? serial

Out:?? serial

Err:?? serial

Net:?? No ethernet found.

TQ2440 # fflinfo

?

Bank # 1: EON EN29LV160ABflash (16 x 16)? Size: 2 MB in 35 Sectors

? AMD Legacy command set,Manufacturer ID:0x1C,Device ID: 0x2249

? Erase timeout: 30000 ms,write timeout: 100ms

?

? Sector Start Addresses:

? 00000000??RO?? 00004000?? RO??00006000?? RO?? 00008000??RO?? 00010000?? RO

? 00020000??RO?? 00030000??????? 00040000??????? 00050000??????? 00060000?????

? 00070000??RO?? 00080000??????? 00090000??????? 000A0000??????? 000B0000?????

? 000C0000??????? 000D0000??????? 000E0000??????? 000F0000??????? 00100000?????

??00110000???????00120000??????? 00130000??????? 00140000??????? 00150000?????

? 00160000??????? 00170000??????? 00180000??????? 00190000??????? 001A0000?????

? 001B0000??????? 001C0000??????? 001D0000??????? 001E0000??????? 001F0000?????

TQ2440 # md.b 32000000 a

32000000: 13 00 00 ea 14 f09f e5 14 f0??? ..........

TQ2440 # erase 100000 +a

?

. done

Erased 1 sectors

TQ2440 # cp.b 32000000100000 a

Copy to Flash... done

TQ2440 # md.b 100000 a

00100000: 13 00 00 ea 14 f09f e5 14 f0??? ..........