Support for FreeScale's i.MX6 SoC.

1 files changed, 90 insertions, 0 deletions

diff --git a/sys/arch/armv7/imx/imxdog.c b/sys/arch/armv7/imx/imxdog.c
new file mode 100644
index 00000000000..a6b32478d70
--- /dev/null
+++ b/sys/arch/armv7/imx/imxdog.c
@@ -0,0 +1,90 @@
+/* $OpenBSD: imxdog.c,v 1.1 2013/09/06 20:45:53 patrick Exp $ */
+/*
+ * Copyright (c) 2012-2013 Patrick Wildt <patrick@blueri.se>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/queue.h>
+#include <sys/malloc.h>
+#include <sys/device.h>
+#include <sys/evcount.h>
+#include <sys/socket.h>
+#include <sys/timeout.h>
+#include <machine/intr.h>
+#include <machine/bus.h>
+#include <armv7/imx/imxvar.h>
+
+/* registers */
+#define WCR		0x00
+#define WSR		0x02
+#define WRSR		0x04
+#define WICR		0x06
+#define WMCR		0x08
+
+struct imxdog_softc {
+	struct device		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+};
+
+struct imxdog_softc *imxdog_sc;
+
+void imxdog_attach(struct device *parent, struct device *self, void *args);
+void imxdog_reset(void);
+
+struct cfattach	imxdog_ca = {
+	sizeof (struct imxdog_softc), NULL, imxdog_attach
+};
+
+struct cfdriver imxdog_cd = {
+	NULL, "imxdog", DV_DULL
+};
+
+void
+imxdog_attach(struct device *parent, struct device *self, void *args)
+{
+	struct imx_attach_args *ia = args;
+	struct imxdog_softc *sc = (struct imxdog_softc *) self;
+
+	sc->sc_iot = ia->ia_iot;
+	if (bus_space_map(sc->sc_iot, ia->ia_dev->mem[0].addr,
+	    ia->ia_dev->mem[0].size, 0, &sc->sc_ioh))
+		panic("imxdog_attach: bus_space_map failed!");
+
+	printf("\n");
+	imxdog_sc = sc;
+}
+
+void
+imxdog_reset()
+{
+	if (imxdog_sc == NULL)
+		return;
+
+	/* disable watchdog and set timeout to 0 */
+	bus_space_write_2(imxdog_sc->sc_iot, imxdog_sc->sc_ioh, WCR, 0);
+
+	/* sequence to reset timeout counter */
+	bus_space_write_2(imxdog_sc->sc_iot, imxdog_sc->sc_ioh, WSR, 0x5555);
+	bus_space_write_2(imxdog_sc->sc_iot, imxdog_sc->sc_ioh, WSR, 0xaaaa);
+
+	/* enable watchdog */
+	bus_space_write_2(imxdog_sc->sc_iot, imxdog_sc->sc_ioh, WCR, 1);
+	/* errata TKT039676 */
+	bus_space_write_2(imxdog_sc->sc_iot, imxdog_sc->sc_ioh, WCR, 1);
+
+	delay(100000);
+}