On Wed, Nov 3, 2010 at 3:24 PM, Wouter Simons <l...@woutersimons.org> wrote: > On 11/03/2010 03:46 AM, Tapas Mishra wrote: >> As far as I understand once the probe function(Not too sure) detects >> or kernel detects then the driver would be looked up >> and control would be handed over to driver. >> If this is correct then how does probe works? Or how a particular >> device's presence on PCI bus is detected. > The PCI system is a special hardware system that replaced ISA. The > interesting thing in a PCI system is that hardware registers itself in > the PCI configuration register. You only need to read that to know what > harware is connected. > > Perhaps that is the how part you are looking for? Exactly you are THE man :) > Here is the info on the PCI config register: > http://en.wikipedia.org/wiki/PCI_configuration_space > > Wouter >Thanks this makes it clear.
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