Sorry, I sent previous messages by mistake, I need help on PCI 6251 register level program

[Haihong]

HI, Guys,

Sorry, I sent previous messages by mistakenly pressing the keyboard. 

I ahve a PCI 6251 board.  I need to use register level program since I am working on the RT Linux.  My program looks like this: 

1) get PCI device

dev = pci_find_device(vender_ID, device_ID, dev);

BAR0=pci_resource_start(dev,0);

BAR_LEN0=pci_resource_len(dev,0);

BAR1=pci_resource_start(dev,1);

BAR_LEN0=pci_resource_len(dev,1);

2) remap the address

mem0=ioremap(BAR0, BAR_LEN0);

mem1=ioremap(BAR1, BAR_LEN1);

3) initialize the MITE Controller

writew( 0xaeae, mem0+0x0340); ( I tried both with and without this line) 

writew( (mem1&0xffffff00)|0x80, mem0+0xc0);

4) test DIO Port1

writew(0xffff, mem1+0x028); // set port1 to output

writew(0xff, mem1+0x024); // output high

PROBLEM:  nothing happened when I run this program.

~~~~~~~~

Is there any body can advise me on this problem?  I thank you very much in advance.

BTW, Where can I find the PIN map of the IDC connector on the corner of the board?  Iahve the PIN map of the 68 pins SCSI connector.

Happy NEW YEAR!

[DiegoF]

Hi,

In:

     writew( (mem1&0xffffff00)|0x80, mem0+0xc0);

'mem1' should be the physical address of bar1 (BAR1) not the virtual kernel address:

     writew( (BAR1&0xffffff00)|0x80, mem0+0xc0);

Hope that helps,
Diego

[Haihong]

HI, DiegoF,

Thank you for your help.  I tried, but it seems still not work.  Do you think there is anything else wrong?

I got the

      Vendor_ID= 0x1093; Device_ID=0x70b8;             by using cat  /proc/bus/pci/devices

I got the

      BAR0 = 0x50002000; BAR1=0x50001000;

after remapping: 

      mem0=0xf8922000; mem1=0xf8924000; 

BTW,

1)  do I need this line: 

      writew(0xaeae, mem0+0x340)?   what's this line for?

2)  Am I right by using:

      writew(0xffff, mem1+0x28); // define DIO port direction

      writew(0xff, mem1+0x24);  //output "0xff" to DIO port

Thank you very much!

[DiegoF]

>> do I need this line: writew(0xaeae, mem0+0x340)?   what's this line for?

I don't think you need it.

>> Am I right by using:

>>     writew(0xffff, mem1+0x28); // define DIO port direction

>>      writew(0xff, mem1+0x24);  //output "0xff" to DIO port

That looks correct.

-------------------------------

Try using writel (long) instead of writew (word).  Both the mite and dio mseries registers are 32-bit registers.  The names of the io macros can be misleading, but you can check the linux source include/asm-i386/io.h:

writeb - 8-bits (unsigned char)
writew -16-bits (unsigned short)
writel - 32-bits (unsinged int)

Let me know if it works,
Diego

P.S. some mseries registers are 16-bit, but the DIO registers you are using are 32-bits

[Haihong]

Hi, DieoF,

Thank you so much!  the DIO function is working! 

My working programe is:

===initial MITE===

writew( 0xaeae, mem0+0x0340); (this is not needed, I deleted it) 

writel( (mem1&0xffffff00)|0x80, mem0+0xc0);  (here writel() is needed, writew() doesn't work)

===test DIO===

writew(0xffff, mem1+0x028); // set port1 to output  ( Here both writel() and writew() work for PORT0, writew() may not work with port2, I guess)

writew(0xff, mem1+0x024); // output high ( Here both writel() and writew() work for PORT0, writew() may not work with port2, I guess)

Thank you again.

BTW,  would you mind if tell me how to sample AD channels?  Using Counters?  I am sorry bothering so much.  I am working on my PhD project, I have spent a lot of time to make the card working.  Thank you very much!

Best,

Haihong 

[Haihong]

Sorry,

writel( (mem1&0xffffff00)|0x80, mem0+0xc0); 

should be:

writel( (BAR1 & 0xffffff00 ) | 0x80, mem0+0xc0);

[DiegoF]

It's no bother, that's what the forums are for...

For MSeries examples I suggest using MHDDK.

Here's some general information on MHDDK:

Measurement Hardware Driver Development Kit Register Level Programming Architecture
Measurement Hardware Driver Development Kit Frequently Asked Questions
How to use a ChipObject
How to Make an iBus