a question of mpc8313, maybe simple

2008-06-23 Thread jumpingProgrammer 

i am working with a board of mpc8313 using default mpc8313erdb.dts.
But i do not know how can i correctly use DMA to transport data from memory
to a PCI device.
i tryed this
{
 .
 request_irq(IRQ,);
 request_dma(.);
 
}

In request_irq() , i do not know what is the parameter IRQ.
And , i did not find any words about DMA in mpc8313erdb.dts .
So 
1. please tell me what should be the parameter IRQ?
  Is it the irq requested when DMA initialized or another one?
2. If i want initialize DMA, how should i do with mpc8313erdb.dts?


-- 
View this message in context: 
http://www.nabble.com/a-question-of-mpc8313%2C-maybe-simple-tp18067094p18067094.html
Sent from the linuxppc-dev mailing list archive at Nabble.com.

___
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev

Re: a question of mpc8313, maybe simple

2008-06-23 Thread jumpingProgrammer 

Thanks a lot for answer my question.
But i am newhand and not very clear about it.
Do you mean:
1. in this case i do not need to include DMA when i "make menuconfig" ?
The path is Device Drivers->DMA.
2. in this case i do not need add any DMA information in mpc8313erdb.dts?

Now i am reading PCI driver in kernel 2.6.20 to catch your meaning.


Scott Wood-2 wrote:
> 
> On Mon, Jun 23, 2008 at 05:48:07AM -0700, jumpingProgrammer wrote:
>> i am working with a board of mpc8313 using default mpc8313erdb.dts.
>> But i do not know how can i correctly use DMA to transport data from
>> memory
>> to a PCI device.
>> i tryed this
>> {
>>  .
>>  request_irq(IRQ,);
>>  request_dma(.);
>>  
>> }
>> 
>> In request_irq() , i do not know what is the parameter IRQ.
> 
> Use pci_dev->irq.
> 
>> And , i did not find any words about DMA in mpc8313erdb.dts .
> 
> PCI devices can do bus-mastering DMA themselves; request_dma() is for ISA
> devices.
> 
> -Scott
> ___
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
> 
> 

-- 
View this message in context: 
http://www.nabble.com/a-question-of-mpc8313%2C-maybe-simple-tp18069331p18081728.html
Sent from the linuxppc-dev mailing list archive at Nabble.com.

___
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev

Re: Using DMA interrupt on MPC8313

2008-06-23 Thread jumpingProgrammer 

I use this in 8313erdb.dts, but can not find DMA info in
/proc/interrupts.why?

[EMAIL PROTECTED] { 
#address-cells = <1>; 
#size-cells = <1>; 
compatible = "fsl,elo-dma"; 
cell-index = <0>; 
reg = <8030 2d0>; /* DMA general status register */ 
ranges = <0 8100 200>; 

[EMAIL PROTECTED] { 
compatible = "fsl,elo-dma-channel"; 
cell-index = <0>; 
reg = <0 80>; 
interrupt-parent = <700>; 
interrupts = <47 8>; 
}; 
[EMAIL PROTECTED] { 
compatible = "fsl,elo-dma-channel"; 
cell-index = <1>; 
reg = <80 80>; 
interrupt-parent = <700>; 
interrupts = <47 8>; 
}; 
[EMAIL PROTECTED] { 
compatible = "fsl,elo-dma-channel"; 
cell-index = <2>; 
reg = <100 80>; 
interrupt-parent = <700>; 
interrupts = <47 8>; 
}; 
[EMAIL PROTECTED] { 
compatible = "fsl,elo-dma-channel"; 
cell-index = <3>; 
reg = <180 80>; 
interrupt-parent = <700>; 
interrupts = <47 8>; 
};
}


___
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev



-- 
View this message in context: 
http://www.nabble.com/Using-DMA-interrupt-on-MPC8313-tp17808164p18084260.html
Sent from the linuxppc-dev mailing list archive at Nabble.com.

___
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev