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sdhci: add optional quirk property to disable card insertion/removal interrupts

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This is needed for a quirk of the Raspberry Pi (bcm2835/6) MMC
controller, where the card insert bit is documented as unimplemented
(always reads zero, doesn't generate interrupts) but is in fact
observed on hardware as set at power on, but is cleared (and remains
clear) on subsequent controller resets.

Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Message-id: 1450738069-18664-4-git-send-email-Andrew.Baumann@microsoft.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Andrew Baumann 2015-12-21 14:47:49 -08:00 committed by Stefan Hajnoczi
parent 62d32ec817
commit 723697551a
2 changed files with 5 additions and 1 deletions
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5
hw/sd/sdhci.c
View File

@ -193,7 +193,9 @@ static void sdhci_reset(SDHCIState *s)
* initialization */
memset(&s->sdmasysad, 0, (uintptr_t)&s->capareg - (uintptr_t)&s->sdmasysad);
sd_set_cb(s->card, s->ro_cb, s->eject_cb);
if (!s->noeject_quirk) {
sd_set_cb(s->card, s->ro_cb, s->eject_cb);
}
s->data_count = 0;
s->stopped_state = sdhc_not_stopped;
}
@ -1276,6 +1278,7 @@ static Property sdhci_sysbus_properties[] = {
DEFINE_PROP_UINT32("capareg", SDHCIState, capareg,
SDHC_CAPAB_REG_DEFAULT),
DEFINE_PROP_UINT32("maxcurr", SDHCIState, maxcurr, 0),
DEFINE_PROP_BOOL("noeject-quirk", SDHCIState, noeject_quirk, false),
DEFINE_PROP_END_OF_LIST(),
};

1
include/hw/sd/sdhci.h
View File

@ -77,6 +77,7 @@ typedef struct SDHCIState {
uint32_t buf_maxsz;
uint16_t data_count; /* current element in FIFO buffer */
uint8_t stopped_state;/* Current SDHC state */
bool noeject_quirk;/* Quirk to disable card insert/remove interrupts */
/* Buffer Data Port Register - virtual access point to R and W buffers */
/* Software Reset Register - always reads as 0 */
/* Force Event Auto CMD12 Error Interrupt Reg - write only */