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rtemsbsd/sdhci: Fix Arasan driver when no card present

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This fixes an issue where the card present signal doesn't stabilize
quickly and indicates present when no card is inserted in a removable
slot.
This commit is contained in:
Rick VanderWal 2023-03-29 16:07:52 -05:00 committed by Joel Sherrill
parent b0fc22cdf8
commit ac4cf946a2
1 changed files with 21 additions and 0 deletions
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21
rtemsbsd/sys/dev/sdhci/arasan_sdhci.c
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@ -195,6 +195,27 @@ arasan_sdhci_get_card_present(device_t dev, struct sdhci_slot *slot)
{
struct arasan_sdhci_softc *sc = device_get_softc(dev);
// wait a maximum of 1 second for card stable to settle
const unsigned int max_tries = 20;
const rtems_interval sleep_ticks =
rtems_clock_get_ticks_per_second() / max_tries;
unsigned int count = 0;
while (!(RD4(sc, SDHCI_PRESENT_STATE) & SDHCI_CARD_STABLE) &&
(count < max_tries))
{
rtems_task_wake_after(sleep_ticks);
++count;
}
if (!(RD4(sc, SDHCI_PRESENT_STATE) & SDHCI_CARD_STABLE))
{
device_printf(dev,
"Card Detect failed to stabilize,"
" setting to not present.\n");
return false;
}
return (RD4(sc, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
}