How to do IO mapped Implimentation ???

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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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 <><

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<><

Quoted 5 lines · 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

Quoted 1 line

memory mapped (buffer/register) is required to control the device. This

is

Quoted 4 lines

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

Quoted 3 lines

         outb(addr) and inb(addr);

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

this

Quoted 5 lines

.

-----Misbah <><

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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 <><

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 <><

Quoted 5 lines · 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

Quoted 1 line

memory mapped (buffer/register) is required to control the device. This

is

Quoted 4 lines

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

Quoted 3 lines

         outb(addr) and inb(addr);

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

this

Quoted 5 lines

.

-----Misbah <><

--
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http://www.nabble.com/How-to-do-IO-mapped-Implimentation-----tp14522349p14555864.html
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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 <><

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

Quoted 5 lines · 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

Quoted 1 line

memory mapped (buffer/register) is required to control the device. This

is

Quoted 4 lines

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

Quoted 3 lines

         outb(addr) and inb(addr);

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

this

Quoted 5 lines

.

-----Misbah <><

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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
[email protected]
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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 <><