MFp4:

	Initial spibus support.  Seems to be OK, but needs some polish.

	# someone should write a bit-bang spi parallel port interface :-)

1 files changed, 28 insertions, 0 deletions

diff --git a/sys/dev/spibus/spibusvar.h b/sys/dev/spibus/spibusvar.h
new file mode 100644
index 0000000..78baaac
--- /dev/null
+++ b/sys/dev/spibus/spibusvar.h
@@ -0,0 +1,28 @@
+/ * $FreeBSD$ */
+
+#define SPIBUS_IVAR(d) (struct spibus_ivar *) device_get_ivars(d)
+#define SPIBUS_SOFTC(d) (struct spibus_softc *) device_get_softc(d)
+
+struct spibus_softc
+{
+	device_t	dev;
+};
+
+struct spibus_ivar
+{
+	uint32_t	cs;
+};
+
+enum {
+	SPIBUS_IVAR_CS		/* chip select that we're on */
+};
+
+#define SPIBUS_ACCESSOR(A, B, T)					\
+__inline static int							\
+spibus_get_ ## A(device_t dev, T *t)					\
+{									\
+	return BUS_READ_IVAR(device_get_parent(dev), dev,		\
+	    SPIBUS_IVAR_ ## B, (uintptr_t *) t);			\
+}
+	
+SPIBUS_ACCESSOR(cs,		CS,		uint32_t)