[U-Boot] [PATCH] Create a new driver for Atmel at91/avr MCI adapters that uses the u-boot mmc framework.

[Reinhard Meyer]

Reinhard Meyer schrieb:
> TOP9000> fatls mmc 0:1
> gen_atmel_mci: CMDR 0x00001050 (16) ARGR 0x00000000 (SR: 0x00000000) COMMAND Dbg
>  Msg
> gen_atmel_mci: CMDR 0x00051051 (17) ARGR 0x00000000 (SR: 0x00000000) COMMAND Dbg
>  Msg
> 
> *** system hangs here ***
> 
> But, if preceeded by a mmc read command it works (except for some odd clock
> related messages):

Ok, the problem is that fatls does not call any init functions, its first call
is a read...

I added a check for initialized so read will fail if MCI has
not been initialized.

The command "mmcinfo" does the initialisation.

TOP9000> fatls mmc 0:1
MCI not initialized!
** Can't read from device 0 **

** Unable to use mmc 0:1 for fatls **
TOP9000> mmci
mmc: setting clock 150000 Hz, block size 512
mmc: clock 150000 too low; setting CLKDIV to 255
mmc: setting clock 0 Hz, block size 512
mmc: clock 0 too low; setting CLKDIV to 255
mmc: setting clock 194000 Hz, block size 512
mmc: setting clock 194000 Hz, block size 512
mmc: setting clock 25000000 Hz, block size 512
Device: Atmel MCI
Manufacturer ID: 89
OEM: 303
Name: NCard
Tran Speed: 25000000
Rd Block Len: 512
SD version 2.0
High Capacity: No
Capacity: 2006974464
Bus Width: 4-bit
TOP9000> fatls mmc 0:1
            windows/
            programme/

0 file(s), 2 dir(s)

I'll rework this driver to use struct SoC access and present it as a patch soon.

Reinhard