mmc: atmel-mci: add pdc support and runtime capabilities detection

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Add pdc support for atmel-mci. It makes at91-mci driver useless because it
was only used for the old atmel MCI core which has pdc but no dma support.
To allow removing at91-mci, the capabilities of the MCI core are detected
at runtime -- then the driver will use pio, pdc or dma transfers.
Warning: at91rm9200 is not supported, to support it we need to use swab32
on data but I have no board to test it.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

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Ludovic Desroches 2011-08-11 15:25:44 +00:00 • committed by Chris Ball

parent b9867f371c

commit 796211b795

2 changed files with 423 additions and 118 deletions

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14

drivers/mmc/host/atmel-mci-regs.h

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525

drivers/mmc/host/atmel-mci.c

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