CFI 1.4 intel cmdset in linux-2.4.21

CFI 1.4 intel cmdset in linux-2.4.21

[Jason Chen]

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Hi, all,

I am trying to use cfi 1.4 in linux-2.4.21(use Intel P30 strata flash), as I
find in datasheet, Intel extended query structure is almost the same in CFI
1.3 & 1.4. 

So I just modified some code about CFI MinorVersion's judgement in
cfi_cmdset_0001.c and cfi_cmdset_0001.h:

 

I got CFI_QUERY_SIZE as 36, and I can read the MajorVersion, MinorVersion
etc in the query, but the number of device hard-partition always read as
zero.

 

What happened? What should I do to solve this issue?

 

in cfi_cmdset_0001.h:

..

#define CFI_READ_QUERY(map, base, adr, extp, size) \

do {  \

         struct cfi_private *__cfi = map->fldrv_priv; \

         int __ofs_factor = __cfi->interleave * __cfi->device_type; \

         int __i; \

         for (__i=0; __i<(size); __i++)  \

                   ((unsigned char*)(extp))[__i] =  \

                            cfi_read_query(map,
(base+(((adr)+__i)*__ofs_factor))); \

}while(0); 

 

#define CFI_QUERY_SIZE(map, base, adr) ({ \

         struct cfi_private *__cfi = map->fldrv_priv; \

         int __ofs_factor = __cfi->interleave * __cfi->device_type; \

         struct cfi_pri_intelext __ext; \

         struct cfi_intelext_regioninfo __rinfo; \

         int __ofs = 0, __num_r, __ri; \

         CFI_READ_QUERY(map, base, adr, (&__ext), sizeof(__ext)); \

         __ofs += sizeof(__ext); \

         if (__ext.MajorVersion == '1' && ((__ext.MinorVersion == '3') ||
(__ext.MinorVersion == '4'))) { \

                   __ofs += (__ext.NumProtectionFields - 1) * (sizeof(__u32)
+ 6); \

                   __ofs += 6; \

                   __num_r = cfi_read_query(map, (base +
((adr+__ofs)*__ofs_factor))); \

                   __ofs ++; \

                   for (__ri=0; __ri < __num_r; __ri++) { \

                            CFI_READ_QUERY(map, base, adr+__ofs, (&__rinfo),
sizeof(__rinfo)); \

                            __ofs += sizeof(__rinfo); \

                            __ofs += (__rinfo.NumBlockTypes - 1) *
sizeof(struct cfi_intelext_blockinfo); \

                   } \

         } \

         __ofs; \

})

..

 

 

 


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CFI 1.4 intel cmdset in linux-2.4.21

[Jason Chen]

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Hi, all,

I am trying to use cfi 1.4 in linux-2.4.21(use Intel P30 strata flash), as I
find in datasheet, Intel extended query structure is almost the same in CFI
1.3 & 1.4. 

So I just modified some code about CFI MinorVersion's judgement in
cfi_cmdset_0001.c and cfi_cmdset_0001.h:

 

I got CFI_QUERY_SIZE as 36, and I can read the MajorVersion, MinorVersion
etc in the query, but the number of device hard-partition always read as
zero.

 

What happened? What should I do to solve this issue?

 

in cfi_cmdset_0001.h:

..

#define CFI_READ_QUERY(map, base, adr, extp, size) \

do {  \

         struct cfi_private *__cfi = map->fldrv_priv; \

         int __ofs_factor = __cfi->interleave * __cfi->device_type; \

         int __i; \

         for (__i=0; __i<(size); __i++)  \

                   ((unsigned char*)(extp))[__i] =  \

                            cfi_read_query(map,
(base+(((adr)+__i)*__ofs_factor))); \

}while(0); 

 

#define CFI_QUERY_SIZE(map, base, adr) ({ \

         struct cfi_private *__cfi = map->fldrv_priv; \

         int __ofs_factor = __cfi->interleave * __cfi->device_type; \

         struct cfi_pri_intelext __ext; \

         struct cfi_intelext_regioninfo __rinfo; \

         int __ofs = 0, __num_r, __ri; \

         CFI_READ_QUERY(map, base, adr, (&__ext), sizeof(__ext)); \

         __ofs += sizeof(__ext); \

         if (__ext.MajorVersion == '1' && ((__ext.MinorVersion == '3') ||
(__ext.MinorVersion == '4'))) { \

                   __ofs += (__ext.NumProtectionFields - 1) * (sizeof(__u32)
+ 6); \

                   __ofs += 6; \

                   __num_r = cfi_read_query(map, (base +
((adr+__ofs)*__ofs_factor))); \

                   __ofs ++; \

                   for (__ri=0; __ri < __num_r; __ri++) { \

                            CFI_READ_QUERY(map, base, adr+__ofs, (&__rinfo),
sizeof(__rinfo)); \

                            __ofs += sizeof(__rinfo); \

                            __ofs += (__rinfo.NumBlockTypes - 1) *
sizeof(struct cfi_intelext_blockinfo); \

                   } \

         } \

         __ofs; \

})

..

 

 


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Re: CFI 1.4 intel cmdset in linux-2.4.21

[Nicolas Pitre]

On Sat, 18 Mar 2006, Jason Chen wrote:

> Hi, all,
> 
> I am trying to use cfi 1.4 in linux-2.4.21(use Intel P30 strata flash), as I
> find in datasheet, Intel extended query structure is almost the same in CFI
> 1.3 & 1.4. 
> 
[...]
> 
> What happened? What should I do to solve this issue?

Upgrade to a later kernel where this is known to be fixed, or backport 
the latest MTD snapshot to your old kernel (but then you're on your 
own if you do so).


Nicolas

Re: CFI 1.4 intel cmdset in linux-2.4.21

[Alexey, Korolev]

Hi Chen,

It looks that you have updated MTD of Linux 2.4.21. Default MTD of Linux 
2.4.21 doesn't attempt to parse h/w partitions.

To avoid issues I would recommend you to use Linux 2.4.21 without 
additional MTD patches.
This case just substitution of '3' for '4' in cfi_cmdset_0001.c will 
help you.

Thanks,
Alexey