8686 with SDIO on AT91SAM9263

[Eric BENARD]

Eric BENARD a écrit :
> Here is it (you first need to apply Marc's 2 last patches (tomeout & 
> reset).
>  From my tests, Marc's previous patch (use PDCBYTE capability) doesn't 
> solve the problem, still investigating on this.
> 
It appears Marc's patch works fine as the 50 bytes command is properly 
completed :
mmc0: starting CMD53 arg 92000032 flags 000001b5
mmc0:     blksz 50 blocks 1 flags 00000100 tsac 1000 ms nsac 0
Sending command 53 as 00011075, arg = 92000032, blocks = 1, length = 50 
(MR = 00
001B01)
Transmitting 50 bytes
MCI irq: status = 00004045, C07F0005, 00000005
Ready to transmit
Command ready
at91_mci_handle_cmdrdy 414
at91_mci_handle_cmdrdy 420
MCI irq: status = 0000C2ED, C07F8008, 00008008
TX buffer empty
Handling the transmit
Block transfer has ended
Completed command
Status = 0000C2E5 [00002000 00000000 00000000 00000000]
mmc0: req done (CMD53): 0: 00002000 00000000 00000000 00000000
mmc0:     50 bytes transferred: 0


But then, the 8686 doesn't answer which means, imho, that it didn't 
receive the data properly.

Using exactly the same at91_mci.c driver and padding in if_sdio.c in 
order to send modulo 4 data blocks make the chipset answering properly.

BTW, here is a fixed sdio irq patch (previous one was missing one line).

Eric
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