Reset the UHCI controller when the device comes back from suspend.

This should be replaced by proper support for suspend one day (global
suspend).

Submitted-by:   Christopher Masto <chris@netmonger.net>

3 files changed, 46 insertions, 22 deletions

diff --git a/sys/dev/usb/uhci.c b/sys/dev/usb/uhci.c
index 5c333b8..dfedf52 100644
--- a/sys/dev/usb/uhci.c
+++ b/sys/dev/usb/uhci.c
@@ -305,8 +305,7 @@ uhci_init(uhci_softc_t *sc)
 		return(err);
 
 	sc->sc_pframes = KERNADDR(&dma);
-	UWRITE2(sc, UHCI_FRNUM, 0);			/* set frame number to 0 */
-	UWRITE4(sc, UHCI_FLBASEADDR, DMAADDR(&dma));	/* set frame list address */
+	sc->sc_flbase  = DMAADDR(&dma);
 
 	err = uhci_init_framelist(sc);
 	if (err) {
@@ -322,10 +321,7 @@ uhci_init(uhci_softc_t *sc)
 	sc->sc_bus.do_poll = uhci_poll;
 
 	DPRINTFN(1,("uhci_init: enabling\n"));
-	UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE | 
-		UHCI_INTR_IOCE | UHCI_INTR_SPIE);	/* enable interrupts */
-
-	return(uhci_run(sc, 1));		/* and here we go... */
+	return uhci_reset(sc);
 }
 
 usbd_status
@@ -424,12 +420,10 @@ uhci_busreset(sc)
 	UHCICMD(sc, 0);			/* do nothing */
 }
 
-#if 0
-void
-uhci_reset(priv)
-	void *priv;
+usbd_status
+uhci_reset(sc)
+	uhci_softc_t *sc;
 {
-	uhci_softc_t *sc = priv;
 	int n;
 
 	/* Reset the host controller */
@@ -442,8 +436,13 @@ uhci_reset(priv)
 	if (n >= UHCI_RESET_TIMEOUT)
 		printf("%s: controller did not reset\n", 
 		       USBDEVNAME(sc->sc_bus.bdev));
+	UWRITE2(sc, UHCI_FRNUM, 0);			/* set frame number to 0 */
+	UWRITE4(sc, UHCI_FLBASEADDR, sc->sc_flbase);	/* set frame list address */
+	UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE | 
+		UHCI_INTR_IOCE | UHCI_INTR_SPIE);	/* enable interrupts */
+
+	return(uhci_run(sc, 1));		/* and here we go... */
 }
-#endif
 
 usbd_status
 uhci_run(sc, run)
diff --git a/sys/dev/usb/uhci_pci.c b/sys/dev/usb/uhci_pci.c
index 3183eda..83bca9b 100644
--- a/sys/dev/usb/uhci_pci.c
+++ b/sys/dev/usb/uhci_pci.c
@@ -1,5 +1,3 @@
-/*	$FreeBSD$ */
-
 /*
  * Copyright (c) 1998 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -35,6 +33,8 @@
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
  */
 
 /* Universal Host Controller Interface
@@ -58,11 +58,12 @@
 #include <sys/proc.h>
 #include <sys/queue.h>
 #if defined(__FreeBSD__)
-#include <machine/bus_pio.h>
-#endif
+#include <sys/bus.h>
+
 #include <machine/bus.h>
-#include <sys/rman.h>
 #include <machine/resource.h>
+#include <sys/rman.h>
+#endif
 
 #include <pci/pcivar.h>
 #include <pci/pcireg.h>
@@ -90,6 +91,29 @@ static const char *uhci_device_generic	= "UHCI (generic) USB controller";
 
 #define PCI_UHCI_BASE_REG               0x20
 
+static int
+uhci_pci_suspend(device_t self)
+{
+	uhci_softc_t *sc;
+
+	sc = device_get_softc(self);
+	bus_generic_suspend(self);
+
+	return 0;
+}
+
+static int
+uhci_pci_resume(device_t self)
+{
+	uhci_softc_t *sc;
+
+	sc = device_get_softc(self);
+	uhci_reset(sc);
+	bus_generic_resume(self);
+
+	return 0;
+}
+
 static const char *
 uhci_pci_match(device_t self)
 {
@@ -148,7 +172,8 @@ uhci_pci_attach(device_t self)
 	sc->iot = rman_get_bustag(res);
 	sc->ioh = rman_get_bushandle(res);
 
-	bus_space_write_2(sc->iot, sc->ioh, UHCI_INTR, 0);	/* disable interrupts */
+	/* disable interrupts */
+	bus_space_write_2(sc->iot, sc->ioh, UHCI_INTR, 0);
 
 	rid = 0;
 	res = bus_alloc_resource(self, SYS_RES_IRQ, &rid, 0, ~0, 1,
@@ -247,6 +272,8 @@ static device_method_t uhci_methods[] = {
 	/* Device interface */
 	DEVMETHOD(device_probe,		uhci_pci_probe),
 	DEVMETHOD(device_attach,	uhci_pci_attach),
+	DEVMETHOD(device_suspend,	uhci_pci_suspend),
+	DEVMETHOD(device_resume,	uhci_pci_resume),
 
 	/* Bus interface */
 	DEVMETHOD(bus_print_child,	bus_generic_print_child),
diff --git a/sys/dev/usb/uhcivar.h b/sys/dev/usb/uhcivar.h
index 9af98b7..266bced 100644
--- a/sys/dev/usb/uhcivar.h
+++ b/sys/dev/usb/uhcivar.h
@@ -133,6 +133,7 @@ typedef struct uhci_softc {
 #endif
 
 	uhci_physaddr_t *sc_pframes;
+	vm_offset_t sc_flbase;
 	struct uhci_vframe sc_vframes[UHCI_VFRAMELIST_COUNT];
 
 	uhci_soft_qh_t *sc_ctl_start;	/* dummy QH for control */
@@ -168,7 +169,4 @@ typedef struct uhci_softc {
 
 usbd_status	uhci_init __P((uhci_softc_t *));
 int		uhci_intr __P((void *));
-#if 0
-void		uhci_reset __P((void *));
-#endif
-
+usbd_status	uhci_reset __P((uhci_softc_t *));