Re: [PATCH] Ngene cam device name

[Oliver Endriss <o.endriss@gmx.de>]

Hi,

On Saturday 12 March 2011 14:29:08 Andreas Oberritter wrote:
> On 03/11/2011 10:44 PM, Martin Vidovic wrote:
> > Andreas Oberritter wrote:
> >> It's rather unintuitive that some CAMs appear as ca0, while others as
> >> cam0.
> >>   
> > Ngene CI appears as both ca0 and cam0 (or sec0). The ca0 node is used
> > as usual, to setup the CAM. The cam0 (or sec0) node is used to read/write
> > transport stream. To me it  looks like an extension of the current API.
> 
> I see. This raises another problem. How to find out, which ca device
> cam0 relates to, in case there are more ca devices than cam devices?

Hm, I do not see a problem here. The API extension is simple:

(1) camX is optional. If camX exists, it is tied to caX.

(2) If there is no camX, the CI/CAM operates in 'legacy mode'.

(3) If camX exists, the encrypted transport stream of the CI/CAM is sent
    through camX, and the decrypted stream is received from camX.
    caX behaves the same way as in (2).

Btw, we should choose a more meaningful name for 'camX'.
I would prefer something like cainoutX or caioX or cinoutX or cioX.

CU
Oliver

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