Re: [Qemu-arm] [PATCH 4/8] bcm2835_emmc: add bcm2835 MMC/SD controller

[Peter Maydell]

On 9 December 2015 at 18:54, Peter Crosthwaite
<address@hidden> wrote:
> On Wed, Dec 9, 2015 at 10:17 AM, Andrew Baumann
> <address@hidden> wrote:
>>> From: Peter Crosthwaite [mailto:address@hidden
>>> Is that more likely to be an IP connectivity problem (wierd input to
>>> the card-detect pin in the SoC)?
>>
>> That might be it, but in any case I still need to model it somehow.
>>
>
> Ideally, this would be managed on the board level but it is kinda hard
> the way to code is organised. Currently SDHCI is managing the SD card
> instantiation due to a lack of QOMification. So for the moment, this
> would be valid as a boolean property which disables the card detect
> logic completely. If we get the SD QOMification though, the power,
> card detect and sd interface proper can then be more finely managed on
> the board level for all these varying connectivity configurations.

Card detect you should be able to handle on the board level without
waiting for QOMification -- it's just modelled as a QEMU irq line
(the vexpress board connects it up to a random register, or you could
not connect it to anything, etc).

I'm working on the QOMification of sd.c this week, though I'm very
rusty on how to properly model buses.

thanks
-- PMM