[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[wind_embedded]

Hello:
 
   Now I port u-boot into mpc8247, I need everyone's help, thanks!
 
   my board configuration is following:
   chip select  chip        size  address
   CS0          AM29LV040B  512K  0xfff00000
   CS1          S29GL256P   64M   0xff800000
   CS2          SDRAM       256M  0x00000000
 
   Before I use VxWorks, it works fine. When I port u-boot, my project
based on IDS8247. I changed configuration in IDS8247.h and updated
flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
Console output(DEBUG is defined):
   CPU:   MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz
   Board: ADS 8247
   I2C:   ready
   DRAM:  128 MB
   Top of RAM usable for U-Boot at: 08000000
   Reserving 160k for U-Boot at: 07fd7000
   Reserving 192k for malloc() at: 07fa7000
   Reserving 76 Bytes for Board Info at: 07fa6fb4
   Reserving 72 Bytes for Global Data at: 07fa6f6c
   Stack Pointer at: 07fa6f48
   New Stack Pointer is: 07fa6f48
   Now running in RAM - U-Boot at: 07fd7000
   FLASH: Manuf. ID @ 0xfff00000: 0x00000004
   ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB
   flash_protect ON: from 0xFFF00000 to 0xFFF22FFF
   flash_protect ON: from 0xFFF70000 to 0xFFF7FFFF
   *** failed ***
   ### ERROR ### Please RESET the board ###
 
   I found the manufacture ID of flash is error , it should be 0x01, but
it is 0x04, it is the first byte that u-boot.bin file was burned into
AM29LV040. In my flash.c file, the code that I get manufacture ID as
following:
   ...
   flash_cmd_autoselect (base);
   mfrId= U8_READ (base);
   flash_cmd_reset (base);
   ...
   The functions that above code called is as following:
   #define U8_WRITE(reg, val)  (*((volatile uchar  *)(reg)) =
((uchar)((val)&0xFF)))
   #define U8_READ(reg)       (*((volatile uchar  *)(reg)))
   static void flash_cmd_reset (ulong base)
   {
   U8_WRITE (base + 0x0, 0xF0);
   }
   static void flash_cmd_unlock (ulong base)
   {
   U8_WRITE (base + 0x555, 0xAA);
   U8_WRITE (base + 0x2AA, 0x55);
   }
   static void flash_cmd_autoselect (ulong base)
   {
   flash_cmd_unlock (base + 0x555);
   U8_WRITE (base + 0x555, 0x90);
   }
 
   I want to get everyone's help, thank you very much!

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Graeme Russ]

On Wednesday, October 13, 2010, wind_embedded <wind_embedded@sina.com> wrote:
> Hello:
>
>  ? Now I port u-boot into mpc8247, I need everyone's help, thanks!
>
>  ? my board configuration is following:
>  ? chip select ?chip ? ? ? ?size ?address
>  ? CS0 ? ? ? ? ?AM29LV040B ?512K ?0xfff00000
>  ? CS1 ? ? ? ? ?S29GL256P ? 64M ? 0xff800000
>  ? CS2 ? ? ? ? ?SDRAM ? ? ? 256M ?0x00000000
>
>  ? Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):

What version of U-Boot are you using? It looks like you are not using
the CFI driver which has supported the AM29LV040B for some time now.
Have a look at the eNET board from current mainline - it uses the same
flash without issue

>  ? CPU: ? MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz
>  ? Board: ADS 8247
>  ? I2C: ? ready
>  ? DRAM: ?128 MB
>  ? Top of RAM usable for U-Boot at: 08000000
>  ? Reserving 160k for U-Boot at: 07fd7000
>  ? Reserving 192k for malloc() at: 07fa7000
>  ? Reserving 76 Bytes for Board Info at: 07fa6fb4
>  ? Reserving 72 Bytes for Global Data at: 07fa6f6c
>  ? Stack Pointer at: 07fa6f48
>  ? New Stack Pointer is: 07fa6f48
>  ? Now running in RAM - U-Boot at: 07fd7000
>  ? FLASH: Manuf. ID @ 0xfff00000: 0x00000004
>  ? ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB
>  ? flash_protect ON: from 0xFFF00000 to 0xFFF22FFF
>  ? flash_protect ON: from 0xFFF70000 to 0xFFF7FFFF
>  ? *** failed ***
>  ? ### ERROR ### Please RESET the board ###
>
>  ? I found the manufacture ID of flash is error , it should be 0x01, but
> it is 0x04, it is the first byte that u-boot.bin file was burned into
> AM29LV040. In my flash.c file, the code that I get manufacture ID as
> following:
>  ? ...
>  ? flash_cmd_autoselect (base);
>  ? mfrId= U8_READ (base);
>  ? flash_cmd_reset (base);
>  ? ...
>  ? The functions that above code called is as following:
>  ? #define U8_WRITE(reg, val) ?(*((volatile uchar ?*)(reg)) =
> ((uchar)((val)&0xFF)))
>  ? #define U8_READ(reg) ? ? ? (*((volatile uchar ?*)(reg)))
>  ? static void flash_cmd_reset (ulong base)
>  ? {
>  ? U8_WRITE (base + 0x0, 0xF0);
>  ? }
>  ? static void flash_cmd_unlock (ulong base)
>  ? {
>  ? U8_WRITE (base + 0x555, 0xAA);
>  ? U8_WRITE (base + 0x2AA, 0x55);
>  ? }
>  ? static void flash_cmd_autoselect (ulong base)
>  ? {
>  ? flash_cmd_unlock (base + 0x555);
>  ? U8_WRITE (base + 0x555, 0x90);
>  ? }
>
>  ? I want to get everyone's help, thank you very much!
>

Use the latest version of U-Boot and the CFI driver rather than this
custom driver you are currently using

Regards,

Graeme

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Heiko Schocher]

Hello wind_embedded,

wind_embedded wrote:
> Hello:
>  
>    Now I port u-boot into mpc8247, I need everyone's help, thanks!
>  
>    my board configuration is following:
>    chip select  chip        size  address
>    CS0          AM29LV040B  512K  0xfff00000
>    CS1          S29GL256P   64M   0xff800000
>    CS2          SDRAM       256M  0x00000000
>  
>    Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):
>    CPU:   MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz

Which version of u-boot do you use?

>    Board: ADS 8247
>    I2C:   ready
>    DRAM:  128 MB
>    Top of RAM usable for U-Boot at: 08000000
>    Reserving 160k for U-Boot at: 07fd7000
>    Reserving 192k for malloc() at: 07fa7000
>    Reserving 76 Bytes for Board Info at: 07fa6fb4
>    Reserving 72 Bytes for Global Data at: 07fa6f6c
>    Stack Pointer at: 07fa6f48
>    New Stack Pointer is: 07fa6f48
>    Now running in RAM - U-Boot at: 07fd7000
>    FLASH: Manuf. ID @ 0xfff00000: 0x00000004
>    ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB
>    flash_protect ON: from 0xFFF00000 to 0xFFF22FFF
>    flash_protect ON: from 0xFFF70000 to 0xFFF7FFFF
>    *** failed ***
>    ### ERROR ### Please RESET the board ###
>  
>    I found the manufacture ID of flash is error , it should be 0x01, but
> it is 0x04, it is the first byte that u-boot.bin file was burned into
> AM29LV040. In my flash.c file, the code that I get manufacture ID as
> following:
>    ...
>    flash_cmd_autoselect (base);
>    mfrId= U8_READ (base);
>    flash_cmd_reset (base);

Hmm.. what code is this? It looks to me, that you don;t use
the CFI drvier! Please try this driver to access your flash.

bye,
Heiko
-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Wolfgang Denk]

Dear "wind_embedded",

In message <000001cb6a92$34979570$a744fea9@E43A> you wrote:
> 
>    Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):

You must never copy any code without trying to understand it. When
adapting code from another board, you need to understand not only your
own hardware in detail, but also the hardware you are copying from.

In your case, you should not use the old flash driver in flash.c at
all. Remove that file, and use the CFI flash driver instead.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
You don't have to stay up nights to succeed; you have to  stay  awake
days.

[U-Boot] 答复: ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[wind_embedded]

On Wednesday, October 13, 2010, wind_embedded <wind_embedded@sina.com> wrote:
> Hello:
>
>    Now I port u-boot into mpc8247, I need everyone's help, thanks!
>
>    my board configuration is following:
>    chip select  chip        size  address
>    CS0          AM29LV040B  512K  0xfff00000
>    CS1          S29GL256P   64M   0xff800000
>    CS2          SDRAM       256M  0x00000000
>
>    Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):

What version of U-Boot are you using? It looks like you are not using
the CFI driver which has supported the AM29LV040B for some time now.
Have a look at the eNET board from current mainline - it uses the same
flash without issue

>    CPU:   MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz
>    Board: ADS 8247
>    I2C:   ready
>    DRAM:  128 MB
>    Top of RAM usable for U-Boot at: 08000000
>    Reserving 160k for U-Boot at: 07fd7000
>    Reserving 192k for malloc() at: 07fa7000
>    Reserving 76 Bytes for Board Info at: 07fa6fb4
>    Reserving 72 Bytes for Global Data at: 07fa6f6c
>    Stack Pointer at: 07fa6f48
>    New Stack Pointer is: 07fa6f48
>    Now running in RAM - U-Boot at: 07fd7000
>    FLASH: Manuf. ID @ 0xfff00000: 0x00000004
>    ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB
>    flash_protect ON: from 0xFFF00000 to 0xFFF22FFF
>    flash_protect ON: from 0xFFF70000 to 0xFFF7FFFF
>    *** failed ***
>    ### ERROR ### Please RESET the board ###
>
>    I found the manufacture ID of flash is error , it should be 0x01, but
> it is 0x04, it is the first byte that u-boot.bin file was burned into
> AM29LV040. In my flash.c file, the code that I get manufacture ID as
> following:
>    ...
>    flash_cmd_autoselect (base);
>    mfrId= U8_READ (base);
>    flash_cmd_reset (base);
>    ...
>    The functions that above code called is as following:
>    #define U8_WRITE(reg, val)  (*((volatile uchar  *)(reg)) =
> ((uchar)((val)&0xFF)))
>    #define U8_READ(reg)       (*((volatile uchar  *)(reg)))
>    static void flash_cmd_reset (ulong base)
>    {
>    U8_WRITE (base + 0x0, 0xF0);
>    }
>    static void flash_cmd_unlock (ulong base)
>    {
>    U8_WRITE (base + 0x555, 0xAA);
>    U8_WRITE (base + 0x2AA, 0x55);
>    }
>    static void flash_cmd_autoselect (ulong base)
>    {
>    flash_cmd_unlock (base + 0x555);
>    U8_WRITE (base + 0x555, 0x90);
>    }
>
>    I want to get everyone's help, thank you very much!
>

Use the latest version of U-Boot and the CFI driver rather than this
custom driver you are currently using

Regards,

Graeme


Oh, I use u-boot-1.1.4 or u-boot-1.2.0, I have compared them with the latest version, there is little difference.
I port AM29lV0404B driver on VxWorks into u-boot, AM29lV0404B driver on VxWorks works fine!

Best regard

[U-Boot] 答复: ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[wind_embedded]

Hello wind_embedded,

wind_embedded wrote:
> Hello:
>  
>    Now I port u-boot into mpc8247, I need everyone's help, thanks!
>  
>    my board configuration is following:
>    chip select  chip        size  address
>    CS0          AM29LV040B  512K  0xfff00000
>    CS1          S29GL256P   64M   0xff800000
>    CS2          SDRAM       256M  0x00000000
>  
>    Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):
>    CPU:   MPC8247 (HiP7 Rev 14, Mask 1.0 1K50M) at 400 MHz

Which version of u-boot do you use?

>    Board: ADS 8247
>    I2C:   ready
>    DRAM:  128 MB
>    Top of RAM usable for U-Boot at: 08000000
>    Reserving 160k for U-Boot at: 07fd7000
>    Reserving 192k for malloc() at: 07fa7000
>    Reserving 76 Bytes for Board Info at: 07fa6fb4
>    Reserving 72 Bytes for Global Data at: 07fa6f6c
>    Stack Pointer at: 07fa6f48
>    New Stack Pointer is: 07fa6f48
>    Now running in RAM - U-Boot at: 07fd7000
>    FLASH: Manuf. ID @ 0xfff00000: 0x00000004
>    ## Unknown FLASH on Bank 0 - Size = 0x00000000 = 0 MB
>    flash_protect ON: from 0xFFF00000 to 0xFFF22FFF
>    flash_protect ON: from 0xFFF70000 to 0xFFF7FFFF
>    *** failed ***
>    ### ERROR ### Please RESET the board ###
>  
>    I found the manufacture ID of flash is error , it should be 0x01,
but
> it is 0x04, it is the first byte that u-boot.bin file was burned into
> AM29LV040. In my flash.c file, the code that I get manufacture ID as
> following:
>    ...
>    flash_cmd_autoselect (base);
>    mfrId= U8_READ (base);
>    flash_cmd_reset (base);

Hmm.. what code is this? It looks to me, that you don;t use
the CFI drvier! Please try this driver to access your flash.

bye,
Heiko
-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany


This code are section of flash_get_size function in flash.c. the related
functions are as following:
static ulong flash_get_size (volatile uchar * addr, flash_info_t * info)
{
    ulong   base;
	uchar value;

    base = (ulong) addr;

	flash_cmd_autoselect (base);
    asm("sync");
  	value = U8_READ (base);
	flash_cmd_reset (base);

	debug ("Manuf. ID @ 0x%08lx: 0x%02x\n", (ulong)addr, value);

	switch (value) {
	case (uchar) AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		addr[0] = (uchar) 0x00FF00FF;	/* restore read mode */
		return (0);			/* no or unknown flash
*/
	}

	flash_cmd_autoselect (base);
    asm("sync");
  	value = U8_READ (base + 1);
	flash_cmd_reset (base);

	debug ("Device ID @ 0x%08lx: 0x%02x\n", (ulong)(&addr[0x1]),
value);

	switch (value) {
	case (uchar) AMD_ID_LV040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x00080000;
		break;				/* => 512K     */

	default:
		info->flash_id = FLASH_UNKNOWN;
		break;
	}

	if (info->sector_count > CFG_MAX_FLASH_SECT) {
		printf ("** ERROR: sector count %d > max (%d) **\n",
				info->sector_count, CFG_MAX_FLASH_SECT);
		info->sector_count = CFG_MAX_FLASH_SECT;
	}

	return (info->size);
}

unsigned long flash_init (void)
{
	unsigned long size_b0;
	int i;
	volatile immap_t * immr = (immap_t *)CFG_IMMR;
	volatile memctl8260_t *memctl = &immr->im_memctl;

	/* Init: no FLASHes known */
	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	/* Static FLASH Bank configuration here - FIXME XXX */
	size_b0 = flash_get_size ((volatile uchar *) CFG_FLASH_BASE,
&flash_info[0]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx =
%ld MB\n",
			size_b0, size_b0 << 20);
	}

	memctl->memc_or0 = 0xfff00866;
	memctl->memc_br0 = 0xfff00801;

	flash_get_offsets (0xfff00000, &flash_info[0]);

#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	/* monitor protection ON by default */
	(void) flash_protect (FLAG_PROTECT_SET,
				CFG_MONITOR_BASE,
				CFG_MONITOR_BASE + monitor_flash_len -
1,
				&flash_info[0]);
#endif

#ifdef	CFG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect (FLAG_PROTECT_SET,
			CFG_ENV_ADDR,
			CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
			&flash_info[0]);
#endif

	flash_info[0].size = size_b0;

	return (size_b0);
}

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[wind_embedded]

Dear "wind_embedded",

In message <000001cb6a92$34979570$a744fea9@E43A> you wrote:
> 
>    Before I use VxWorks, it works fine. When I port u-boot, my project
> based on IDS8247. I changed configuration in IDS8247.h and updated
> flash.c, after I compiled u-boot, I burned u-boot.bin into AM29LV040B.
> Console output(DEBUG is defined):

You must never copy any code without trying to understand it. When
adapting code from another board, you need to understand not only your
own hardware in detail, but also the hardware you are copying from.

In your case, you should not use the old flash driver in flash.c at
all. Remove that file, and use the CFI flash driver instead.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
You don't have to stay up nights to succeed; you have to  stay  awake
days.

Dear Wolfgang Denk:
    Because AM29LV040B driver has been used on VxWorks and it works
fine, so code of flash.c is taken from AM29LV040B driver. I think it
should be good, but bad!

Best regard

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Graeme Russ]

On Wednesday, October 13, 2010, wind_embedded <wind_embedded@sina.com> wrote:
> On Wednesday, October 13, 2010, wind_embedded <wind_embedded@sina.com> wrote:
>> Hello:
>>

>
>
> Oh, I use u-boot-1.1.4 or u-boot-1.2.0, I have compared them with the latest version, there is little difference.
> I port AM29lV0404B driver on VxWorks into u-boot, AM29lV0404B driver on VxWorks works fine!
>
> Best regard

A few points:

Is the VxWorks driver GPL compatible? If not, you cannot legally
distribute your version of U-Boot (private in-house use only)

There is massive differences between 1.2.0 and current mainline

Why bother porting a proprietary driver and risk legal complications
when mainline supports your flash using the CFI driver?

Download the latest U-Boot and have a look at the eNET board for
getting your flash working

Regards

Graeme

[U-Boot] 答复: ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Wolfgang Denk]

Dear "wind_embedded",

In message <000c01cb6aad$14458d20$a744fea9@E43A> you wrote:
>
> Oh, I use u-boot-1.1.4 or u-boot-1.2.0, I have compared them with the latest version, there is little difference.
> I port AM29lV0404B driver on VxWorks into u-boot, AM29lV0404B driver on VxWorks works fine!

well, when you completely ignore all good advice, including to ignore
known-to-be working code, and instead insist on using versions that
are > 3 years old and hopelessly obsoleted...

...then you must face the fact that you cannot get much help from the
community.


Update to recent code (v2010.09 at least), and use the generic CFI
driver.

If you then should still have problems please feel free to ask again.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
A list is only as strong as its weakest link.            -- Don Knuth

[U-Boot] 答复: 答复: ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[wind_embedded]

well, when you completely ignore all good advice, including to ignore
known-to-be working code, and instead insist on using versions that
are > 3 years old and hopelessly obsoleted...

..then you must face the fact that you cannot get much help from the
community.


Update to recent code (v2010.09 at least), and use the generic CFI
driver.

If you then should still have problems please feel free to ask again.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
A list is only as strong as its weakest link.            -- Don Knuth

Dear Wolfgang Denk:
   I have enable u-boot working on version u-boot1-1.1.4 and latest
version. I found the problem is the time interval between writing and
reading flash. The question is very strange, the CPU configuration of
VxWorks is same as u-boot, flash driver on VxWorks is good, but bad on
u-boot.
  Whatever thank you very much;)

Best regard

[U-Boot] ppc, flash init on mpc8247, Unknown FLASH on Bank 0

[Graeme Russ]

On Thursday, October 14, 2010, wind_embedded <wind_embedded@sina.com> wrote:
>
>
> well, when you completely ignore all good advice, including to ignore
> known-to-be working code, and instead insist on using versions that
> are > 3 years old and hopelessly obsoleted...
>
> ..then you must face the fact that you cannot get much help from the
> community.
>
>
> Update to recent code (v2010.09 at least), and use the generic CFI
> driver.
>
> If you then should still have problems please feel free to ask again.
>
> Best regards,
>
> Wolfgang Denk
>
> --
> DENX Software Engineering GmbH, ? ? MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> A list is only as strong as its weakest link. ? ? ? ? ? ?-- Don Knuth
>
> Dear Wolfgang Denk:
>  ? I have enable u-boot working on version u-boot1-1.1.4 and latest

Do you mean you are using 1.1.4 or do you mean you are using the
latest version from the git repository?

> version. I found the problem is the time interval between writing and
> reading flash. The question is very strange, the CPU configuration of

Are you using the CFI driver or a custom driver which uses time delays?

> VxWorks is same as u-boot, flash driver on VxWorks is good, but bad on
> u-boot.
>  ?Whatever thank you very much;)

I repeat:

Using the CFI driver and the latest version of U-Boot, this flash
works without issue.

Look at the eNET board for guidance

Regards

Graeme