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Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Add support for the scatter-gather DMA mode present on newer controllers.
As the mode requires 32-bit alignment, non-aligned chunks are handled by
using a bounce buffer.
Also add some new quirks to handle controllers that have bugs in the
ADMA engine.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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The upcoming JMicron chips will have solved all the currently known
bugs, so don't penalize them for older problems.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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The Ricoh controllers cannot handle unaligned data blocks.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Gracefully handle when the device is suddenly removed. Do a test read
and avoid any further access if that read returns -1.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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JMicron chips sometimes have two interfaces to work around limitations
in Microsoft's sdhci driver. This patch allows us to use either interface.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Some of the JMicron chips requires us to manually enable the power
output stages of the chip. Add the necessary hooks and functions to
manage this.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Give the quirk for broken timeout handling a better chance of handling
more controllers by simply classifying the system as broken and setting
a fixed value.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Extend the quirks handling in the PCI driver to be able to have
callbacks and not just flags.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Remove the quirk to force DMA on the Ricoh and TI controllers as it is
no longer needed. The only bug they have is that they use an incorrect
PCI interface value, and that is not respected anymore.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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The SDHCI interface is not PCI specific, yet the Linux driver was
intimitely connected to the PCI bus. This patch properly separates
the PCI specific portion from the bus independent code.
This patch is based on work by Ben Dooks but he did not have time
to complete it.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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