Re: help, question on pci communication!

["invictus rm" <invictus_rm@hotmail.com>]

hi,

 If the BCM1250 is operating in the device mode in the peripheral slot of 
the CPCI chassis, u need t get the enumeration of the PCI being done from 
MCP 750 right.
 The code for MCP750 alread exists in the linux kernel ( if i remember 
correctly).
U can proceed in the following directions-->
(a) Get the PCI enumeration working properly on the MCP750 ( look at the 
ouput of lspci -vvv to decide whether resource allocation is proper or not) 
. The powerpc provides a fairly comprehensive PCI enumeration code( 
including scanning beyond the bridge).
(b) Once u are able to see ur device in the lspci output on the MCP board , 
u can load the driver ( ur custom driver ) to do the transfer from the 
BCM1250 to MCP and vice versa.
(v) Look at the few PCI based drivers about the way the data transfers is 
handled specially pci_alloc_* / pci_map_*/pci_resource_*.........
Hope this helps




> From: "Guangxing Zhang" <guangxing@ict.ac.cn>
> To: Fuxin Zhang <fxzhang@ict.ac.cn>
> CC: linux-mips@linux-mips.org <linux-mips@linux-mips.org>, angela 
> <jhyang@ict.ac.cn>
> Subject: help, question on pci communication!
> Date: Wed, 24 Sep 2003 16:29:32 +0800
>
> Hi, Fuxin and everyone see this mail,
>     In linux world ,newbies always like to ask and the veterans will 
> always be enthusiastic.:)~~
>     Now there is a "ask", of course i am a newbie.
>     Follow is the  architecture  which we are working on.
>     Now i want to transfer the data from the "sb1250" to mcp750 through 
> the PCI bus with the help of 21555 bridge.
> I want to implement it in kernel module.Although knowing "use the force 
> ,read source",but i really do not know
> how and where to begin.
>     Is there any advice on it ? How to implement the communication through 
> PCI (or PCI-to-PCI bridge) in kernel
> moudle?
>     Any help will be appreciated!Thank in advance!
>
>                       -------------
>                           |  MCP 750  |  (Power PC)
>                       -------------
>                             |
> ¡¡        -------------------------------------------CPCI
>                          |
>              ---------------|--------------------------------
>              |      --------|-----                         |
>              |      |Intel 21555 |(PCI-TO-PCI Bridge)      |
>              |      --------------                         |
>              |        |                                                    |
>              |      --------(PCI bus)                                      |
>                          |          |                                  |
>                          |       --------                              |
>                          |               |SB1250|(CPU)                         |
>                          |       --------                              |
>              ----------------------------------------------
> ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Guangxing Zhang
> ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡guangxing@ict.ac.cn
>                             2003-09-24 16:03:04
> ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡
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