How to do IO mapped Implimentation ???

How to do IO mapped Implimentation ???

[Misbah khan]

Hi all...

I am writing a driver in which device port is mapped to CPLD and 8 bit data
bus is directly connected from processor to CPLD. Read write on CPLD memory
mapped (buffer/register) is required to control the device. This is now IO
mapped to processor.

I need to know whether i am right if i impliment like this :-
         addr=ioremap(base_addr);          // Remap to Mem mapped address
         outb(addr) and inb(addr);

Please suggest me if i am wrong or there could be better solution to this .

-----Misbah <><
         
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Re: How to do IO mapped Implimentation ???

[Jeyner Gil Caga]

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Hi Misbah,

If I am not mistaken, ioremap takes 2 parameters,
ioremap(base_addr,size_to_remap). i have tried out_8() and in_8() to issue
the command.


Regards,
gil

On 12/28/07, Misbah khan <misbah_khan@engineer.com> wrote:
>
>
> Hi all...
>
> I am writing a driver in which device port is mapped to CPLD and 8 bit
> data
> bus is directly connected from processor to CPLD. Read write on CPLD
> memory
> mapped (buffer/register) is required to control the device. This is now IO
> mapped to processor.
>
> I need to know whether i am right if i impliment like this :-
>         addr=ioremap(base_addr);          // Remap to Mem mapped address
>         outb(addr) and inb(addr);
>
> Please suggest me if i am wrong or there could be better solution to this
> .
>
> -----Misbah <><
>
> --
> View this message in context:
> http://www.nabble.com/How-to-do-IO-mapped-Implimentation-----tp14522349p14522349.html
> Sent from the linuxppc-embedded mailing list archive at Nabble.com.
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>

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Re: How to do IO mapped Implimentation ???

[Misbah khan]

yes with respect to ioremap() its right ...i just missed the secound argument
....

in_8() and out_8() will work fine or i need to use in_be8() and out_be8() on
PPC architecture ????

---Misbah<><


Misbah khan wrote:
> 
> Hi all...
> 
> I am writing a driver in which device port is mapped to CPLD and 8 bit
> data bus is directly connected from processor to CPLD. Read write on CPLD
> memory mapped (buffer/register) is required to control the device. This is
> now IO mapped to processor.
> 
> I need to know whether i am right if i impliment like this :-
>          addr=ioremap(base_addr);          // Remap to Mem mapped address
>          outb(addr) and inb(addr);
> 
> Please suggest me if i am wrong or there could be better solution to this
> .
> 
> -----Misbah <><
>          
> 

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Re: How to do IO mapped Implimentation ???

[Jeyner Gil Caga]

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In ppc440 epx, I couldn't find any in_be8() or out_be8(), so I just use
in_8() and out_8().

gil


On 12/31/07, Misbah khan <misbah_khan@engineer.com> wrote:
>
>
> yes with respect to ioremap() its right ...i just missed the secound
> argument
> ....
>
> in_8() and out_8() will work fine or i need to use in_be8() and out_be8()
> on
> PPC architecture ????
>
> ---Misbah<><
>
>
> Misbah khan wrote:
> >
> > Hi all...
> >
> > I am writing a driver in which device port is mapped to CPLD and 8 bit
> > data bus is directly connected from processor to CPLD. Read write on
> CPLD
> > memory mapped (buffer/register) is required to control the device. This
> is
> > now IO mapped to processor.
> >
> > I need to know whether i am right if i impliment like this :-
> >          addr=ioremap(base_addr);          // Remap to Mem mapped
> address
> >          outb(addr) and inb(addr);
> >
> > Please suggest me if i am wrong or there could be better solution to
> this
> > .
> >
> > -----Misbah <><
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/How-to-do-IO-mapped-Implimentation-----tp14522349p14554843.html
> Sent from the linuxppc-embedded mailing list archive at Nabble.com.
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>

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Re: How to do IO mapped Implimentation ???

[Misbah khan]

I have used in_be32() and out_be32() for ppc8248 in one of my driver for FPGA
in which the fpga memory is mapped here it is Io mapped thats the only
difference ....remapping and using in_8() and out_8() will it work for
BigEndian arch ????

-----Misbah <><


Misbah khan wrote:
> 
> Hi all...
> 
> I am writing a driver in which device port is mapped to CPLD and 8 bit
> data bus is directly connected from processor to CPLD. Read write on CPLD
> memory mapped (buffer/register) is required to control the device. This is
> now IO mapped to processor.
> 
> I need to know whether i am right if i impliment like this :-
>          addr=ioremap(base_addr);          // Remap to Mem mapped address
>          outb(addr) and inb(addr);
> 
> Please suggest me if i am wrong or there could be better solution to this
> .
> 
> -----Misbah <><
>          
> 

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Re: How to do IO mapped Implimentation ???

[Jeyner Gil Caga]

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Hmmm, I have not touched ppc8248 before, but I guess it will work since it
is only 1 byte, not 2 or 4 byte access. I have used it in ppc 440epx, and
that eval board is big endian as well.

On 12/31/07, Misbah khan <misbah_khan@engineer.com> wrote:
>
>
> I have used in_be32() and out_be32() for ppc8248 in one of my driver for
> FPGA
> in which the fpga memory is mapped here it is Io mapped thats the only
> difference ....remapping and using in_8() and out_8() will it work for
> BigEndian arch ????
>
> -----Misbah <><
>
>
> Misbah khan wrote:
> >
> > Hi all...
> >
> > I am writing a driver in which device port is mapped to CPLD and 8 bit
> > data bus is directly connected from processor to CPLD. Read write on
> CPLD
> > memory mapped (buffer/register) is required to control the device. This
> is
> > now IO mapped to processor.
> >
> > I need to know whether i am right if i impliment like this :-
> >          addr=ioremap(base_addr);          // Remap to Mem mapped
> address
> >          outb(addr) and inb(addr);
> >
> > Please suggest me if i am wrong or there could be better solution to
> this
> > .
> >
> > -----Misbah <><
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/How-to-do-IO-mapped-Implimentation-----tp14522349p14555864.html
> Sent from the linuxppc-embedded mailing list archive at Nabble.com.
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>

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Re: How to do IO mapped Implimentation ???

[Misbah khan]

You are absolutly right and i guess it will certainly work for 8248 as well ,
but the only concern is that " here in mine case the register is not memory
mapped where as its IO mapped " we have to consider the memory as IO port
and then access the data ....

What you have used i guess its memory mapped ...Is it that accessing memory
mapped is same as io mapped ?????


---Misbah

Misbah khan wrote:
> 
> Hi all...
> 
> I am writing a driver in which device port is mapped to CPLD and 8 bit
> data bus is directly connected from processor to CPLD. Read write on CPLD
> memory mapped (buffer/register) is required to control the device. This is
> now IO mapped to processor.
> 
> I need to know whether i am right if i impliment like this :-
>          addr=ioremap(base_addr);          // Remap to Mem mapped address
>          outb(addr) and inb(addr);
> 
> Please suggest me if i am wrong or there could be better solution to this
> .
> 
> -----Misbah <><
>          
> 

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Re: How to do IO mapped Implimentation ???

[Jeyner Gil Caga]

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Oh, I just missed the io mapped in your previous email. Unfortunately, my
experience is only limited to memory map. I think they should be the same.

On 12/31/07, Misbah khan <misbah_khan@engineer.com> wrote:
>
>
> You are absolutly right and i guess it will certainly work for 8248 as
> well ,
> but the only concern is that " here in mine case the register is not
> memory
> mapped where as its IO mapped " we have to consider the memory as IO port
> and then access the data ....
>
> What you have used i guess its memory mapped ...Is it that accessing
> memory
> mapped is same as io mapped ?????
>
>
> ---Misbah
>
> Misbah khan wrote:
> >
> > Hi all...
> >
> > I am writing a driver in which device port is mapped to CPLD and 8 bit
> > data bus is directly connected from processor to CPLD. Read write on
> CPLD
> > memory mapped (buffer/register) is required to control the device. This
> is
> > now IO mapped to processor.
> >
> > I need to know whether i am right if i impliment like this :-
> >          addr=ioremap(base_addr);          // Remap to Mem mapped
> address
> >          outb(addr) and inb(addr);
> >
> > Please suggest me if i am wrong or there could be better solution to
> this
> > .
> >
> > -----Misbah <><
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/How-to-do-IO-mapped-Implimentation-----tp14522349p14557204.html
> Sent from the linuxppc-embedded mailing list archive at Nabble.com.
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>

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Re: How to do IO mapped Implimentation ???

[Misbah khan]

Till now i assume that Io mapped and memory mapped Implimentation are same
...the biggest doubt is How the two would remain the same ....If any of you
have worked on it Please share your experience with me ....


Misbah khan wrote:
> 
> Hi all...
> 
> I am writing a driver in which device port is mapped to CPLD and 8 bit
> data bus is directly connected from processor to CPLD. Read write on CPLD
> memory mapped (buffer/register) is required to control the device. This is
> now IO mapped to processor.
> 
> I need to know whether i am right if i impliment like this :-
>          addr=ioremap(base_addr);          // Remap to Mem mapped address
>          outb(addr) and inb(addr);
> 
> Please suggest me if i am wrong or there could be better solution to this
> .
> 
> -----Misbah <><
>          
> 

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