• Pavel Pisa's avatar
    [ARM] 3457/1: i.MX: SD/MMC support for i.MX/MX1 · 56ca9040
    Pavel Pisa authored
    Patch from Pavel Pisa
    
    This patch adds support of i.MX/MX1 SD/MMC controller.
    It has been significantly redesigned from the original Sascha Hauer's
    version to support scatter-gather DMA, to conform to latest Pierre Ossman's
    and Russell King's MMC-SD Linux 2.6.x infrastructure.
    The handling of all events has been moved to the softirq context
    and is designed with no busy-looping in mind. Unfortunately
    some controller bugs has to be overcome by limited looping
    about 2-20 usec but these are observed only for initial card
    recognition phase.
    
    There are still some missing/missed IRQs problems under heavy load.
    Help of somebody with access to the full SDHC design information
    is probably necessary.
    
    Regenerated against 2.6.16-git-060402 to solve clash with other patches.
    Signed-off-by: default avatarPavel Pisa <pisa@cmp.felk.cvut.cz>
    Acked-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
    56ca9040
imxmmc.c 27.4 KB