SD command queue compatibility expansion#7265
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P33M wants to merge 4 commits intoraspberrypi:rpi-6.12.yfrom
Draft
SD command queue compatibility expansion#7265P33M wants to merge 4 commits intoraspberrypi:rpi-6.12.yfrom
P33M wants to merge 4 commits intoraspberrypi:rpi-6.12.yfrom
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Several types of cards have a common bug where the vendor did not populate the General Information block, but extension registers are present at assumed function offsets, and the features are correctly implemented. Probe the offsets to see if valid data is returned. Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
Several card OEMs, mainly using Silicon Motion SM270x flash controllers, have a deficient CMD49 handler that throws away length/offset and applies the whole block to the addressed extension register page. Add a quirk to do a read-modify-write cycle for any extension register write. Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
These cards have the same broken CMD49 behaviour across 465T/460T/240I product lines. Add the Manufacturer ID and match on CID fields that remain consistent across these types. Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
The Biwin MS160 line of cards have a broken CMD49 handler and require this workaround. The CID match is somewhat broad, but the card name appears to be unique to these cards. Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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Prerequisite changes to allow opt-in testing using the dtparam with these mildly broken cards.