Openmoko Bug #1802: Suspend/resume corrupts SD card's partition table
Openmoko Public Trac
bugs at docs.openmoko.org
Sat Sep 6 04:16:59 CEST 2008
#1802: Suspend/resume corrupts SD card's partition table
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Reporter: montgoss | Owner: openmoko-kernel
Type: defect | Status: new
Priority: normal | Milestone:
Component: System Software | Version:
Severity: critical | Resolution:
Keywords: | Blockedby:
Blocking: |
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Comment(by simat):
I had a quick look at Andy's fix which from what i can see is just turning
the SD clock on at Suspend and back off on Resume. This may work but i am
not sure it is the proper fix. The Simplified SD Spec states that at power
up
"
• The host shall supply power to the card so that the voltage is reached
to Vdd_min within 250ms and
start to supply at least 74 SD clocks to the SD card with keeping CMD
line to high. In case of SPI
mode, CS shall be held to high during 74 clock cycles.
"
I just wonder if this is being done or not?
I don't have the SDHC spec, so am not sure if it is the same for SDHC. If
someone could point me to a copy of the SDHC spec i will check it out.
Simon
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/1802#comment:8>
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