svn commit: r188016 - projects/cambria/sys/dev/cfi

[Sam Leffler]

Author: sam
Date: Mon Feb  2 18:32:41 2009
New Revision: 188016
URL: http://svn.freebsd.org/changeset/base/188016

Log:
  working bus shim:
  o setup CS0 properly
  o force interface width to 2 as we can't hack variable width reads
    on the expansion bus
  o fix bus dependency typo (boy that was painful to find)

Modified:
  projects/cambria/sys/dev/cfi/cfi_bus_ixp4xx.c

Modified: projects/cambria/sys/dev/cfi/cfi_bus_ixp4xx.c
==============================================================================
--- projects/cambria/sys/dev/cfi/cfi_bus_ixp4xx.c	Mon Feb  2 18:30:15 2009	(r188015)
+++ projects/cambria/sys/dev/cfi/cfi_bus_ixp4xx.c	Mon Feb  2 18:32:41 2009	(r188016)
@@ -41,15 +41,32 @@ __FBSDID("$FreeBSD$");
 #include <dev/cfi/cfi_var.h>
 
 #include <arm/xscale/ixp425/ixp425reg.h>
+#include <arm/xscale/ixp425/ixp425var.h>
 
 static int
 cfi_ixp4xx_probe(device_t dev)
 {
-#if 0
+#define	EXP_TIMING_PRESERVE \
+	(EXP_TIMING_RSVD | EXP_TIMING_MASK)
+	struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
+	struct cfi_softc *sc = device_get_softc(dev);
+
+	/* setup CS0 per Intel AP-785 */
+	EXP_BUS_WRITE_4(sa, EXP_TIMING_CS0_OFFSET,
+	    (EXP_BUS_READ_4(sa, EXP_TIMING_CS0_OFFSET) & EXP_TIMING_PRESERVE)
+	    | EXP_CS_EN
+	    | EXP_SZ_16M
+	    | EXP_WR_EN
+	    | EXP_BYTE_RD16
+	    | IXP425_EXP_ADDR_T(1)
+	    | IXP425_EXP_SETUP_T(1)
+	    | IXP425_EXP_STROBE_T(4)
+	    | IXP425_EXP_HOLD_T(1)
+	    | IXP425_EXP_RECOVERY_T(1));
+
+	sc->sc_width = 2;		/* NB: don't probe interface width */
 	return cfi_probe(dev);
-#else
-	return ENXIO;
-#endif
+#undef EXP_TIMING_PRESERVE
 }
 
 static device_method_t cfi_ixp4xx_methods[] = {
@@ -66,4 +83,4 @@ static driver_t cfi_ixp4xx_driver = {
 	cfi_ixp4xx_methods,
 	sizeof(struct cfi_softc),
 };
-DRIVER_MODULE (cfi, ixp4xx, cfi_ixp4xx_driver, cfi_devclass, 0, 0);
+DRIVER_MODULE (cfi, ixp, cfi_ixp4xx_driver, cfi_devclass, 0, 0);