sdmmc card detect

Stefan Sperling

2016-02-02 20:33:51 UTC

Post by Mark Kettenis
The Bay Trail SoC SD controller for the SD card slot doesn't use the
Card Detect bit in the standard register. Instead there is a separate
gpio that signals the presence of a card in the slot. The diff below
introduces a function pointer in the sdhc softc that, if non-NULL,
gets called instead of checking the bit in the standard register.
ok?

Post by Mark Kettenis
Index: sdhc.c
===================================================================
RCS file: /cvs/src/sys/dev/sdmmc/sdhc.c,v
retrieving revision 1.41
diff -u -p -r1.41 sdhc.c
--- sdhc.c 11 Jan 2016 06:54:53 -0000 1.41
+++ sdhc.c 2 Feb 2016 18:57:57 -0000
@@ -381,6 +381,10 @@ int
sdhc_card_detect(sdmmc_chipset_handle_t sch)
{
struct sdhc_host *hp = sch;
+
+ if (hp->sc->sc_card_detect)
+ return hp->sc->sc_card_detect(hp->sc);
+
return ISSET(HREAD4(hp, SDHC_PRESENT_STATE), SDHC_CARD_INSERTED) ?
1 : 0;
}
Index: sdhcvar.h
===================================================================
RCS file: /cvs/src/sys/dev/sdmmc/sdhcvar.h,v
retrieving revision 1.6
diff -u -p -r1.6 sdhcvar.h
--- sdhcvar.h 31 Jul 2011 16:55:01 -0000 1.6
+++ sdhcvar.h 2 Feb 2016 18:57:57 -0000
@@ -28,6 +28,8 @@ struct sdhc_softc {
struct sdhc_host **sc_host;
int sc_nhosts;
u_int sc_flags;
+
+ int (*sc_card_detect)(struct sdhc_softc *);
};
/* Host controller functions called by the attachment driver. */