On 1/29/07, Wolfgang Denk wd@denx.de wrote:
In message 528646bc0701281850n4b4fa2b1x7022b4daf9bfe89a@mail.gmail.com you wrote:
IMHO we should provide a user inteface which is powerful, yet easy to
use - this requires it must be intuitive to the end user. For most f
them, (NOR) flash *is* memory, while and IDE or USB disk and even an EEPROM is not.
Right; so what do we do with MMC and DataFlash?
So far I hear only discussion from developers.
Are there any users of Dataflah and MCC here? What is your opinion about the current user interface, abd about the suggested changes?
I'm not sure if I understand. U-boot pretends mmc and DataFlash are memory mapped? That sounds completely insane, especially for MMC. What happens if you insert an 8GB SD card on a 32-bit host?
I haven't actually used DataFlash on any avr32 boards yet, but I have written an MMC driver for it and I didn't even know it could be accessed as a memory-mapped device. In fact, I can't even understand why anyone would want that -- the main usage of an MMC or SD card is to put a filesystem (usually FAT, but you can use pretty much anything) on it and use it for storage.
I guess DataFlash makes slightly more sense to access this way, but I still think the interface is totally unintuitive.
So, even though I'm technically more of a developer than a user, consider this a vote in favour of ripping the stuff out. Unless of course lots of users depend on stuff working this way. I highly doubt it since it doesn't even work properly (yes, the MMC stuff too; the mmc2info function on pxa is a total hack which only works for 32MB cards.)
Håvard