watchdog driver for Geode SC1100 (e.g. in soekris net4801); ok mickey@

1 files changed, 120 insertions, 0 deletions

diff --git a/sys/arch/i386/pci/geodesc.c b/sys/arch/i386/pci/geodesc.c
new file mode 100644
index 00000000000..92675f387ed
--- /dev/null
+++ b/sys/arch/i386/pci/geodesc.c
@@ -0,0 +1,120 @@
+/*      $OpenBSD: geodesc.c,v 1.1 2003/08/07 08:32:56 markus Exp $     */
+
+/*
+ * Copyright (c) 2003 Markus Friedl <markus@openbsd.org>
+ *
+ * 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.
+ */
+
+/* 
+ * Geode SC1100 Information Appliance On a Chip
+ * http://www.national.com/ds.cgi/SC/SC1100.pdf
+ */
+
+#include <sys/cdefs.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/bus.h>
+
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcidevs.h>
+
+#include <arch/i386/pci/geodescreg.h>
+
+struct geodesc_softc {
+        struct device           sc_dev;
+        bus_space_tag_t         sc_iot;
+        bus_space_handle_t      sc_ioh;
+};
+
+int     geodesc_match(struct device *, void *, void *);
+void    geodesc_attach(struct device *, struct device *, void *);
+int     geodesc_wdogctl_cb(void *, int);
+
+struct cfattach geodesc_ca = {
+        sizeof(struct geodesc_softc), geodesc_match, geodesc_attach
+};
+
+struct cfdriver geodesc_cd = {
+        NULL, "geodesc", DV_DULL
+};
+
+int
+geodesc_match(struct device *parent, void *match, void *aux)
+{
+        struct pci_attach_args *pa = aux;
+
+        if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
+            PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_XBUS)
+                return (1);
+        return (0);
+}
+
+#define WDSTSBITS "\20\x04WDRST\x03WDSMI\x02WDINT\x01WDOVF"
+
+void
+geodesc_attach(struct device *parent, struct device *self, void *aux)
+{
+        struct geodesc_softc *sc = (void *) self;
+        struct pci_attach_args *pa = aux;
+        uint16_t cnfg, cba;
+        uint8_t sts, rev, iid;
+        pcireg_t reg;
+
+        printf("\n");
+        
+        reg = pci_conf_read(pa->pa_pc, pa->pa_tag, SC1100_F5_SCRATCHPAD);
+        sc->sc_iot = pa->pa_iot;
+        if (bus_space_map(sc->sc_iot, reg, 64, 0, &sc->sc_ioh)) {
+                printf("%s: unable to map registers at %p\n",
+                    sc->sc_dev.dv_xname, reg);
+                return;
+        }
+        cba = bus_space_read_2(sc->sc_iot, sc->sc_ioh, GCB_CBA);
+        if (cba != reg) {
+                printf("%s: cba mismatch: cba %p != reg %p\n",
+                    sc->sc_dev.dv_xname, cba, reg);
+                bus_space_unmap(sc->sc_iot, sc->sc_ioh, 64);
+                return;
+        }
+        sts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, GCB_WDSTS);
+        cnfg = bus_space_read_2(sc->sc_iot, sc->sc_ioh, GCB_WDCNFG);
+        iid = bus_space_read_1(sc->sc_iot, sc->sc_ioh, GCB_IID);
+        rev = bus_space_read_1(sc->sc_iot, sc->sc_ioh, GCB_REV);
+
+        printf("%s: iid %d revision %d wdstatus %b\n",
+            sc->sc_dev.dv_xname, iid, rev, sts, WDSTSBITS);
+
+        /* setup and register watchdog */
+        bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDTO, 0);
+        sts |= WDOVF_CLEAR;
+        bus_space_write_1(sc->sc_iot, sc->sc_ioh, GCB_WDSTS, sts);
+        cnfg &= ~WDCNFG_MASK;;
+        cnfg |= WDTYPE1_RESET|WDPRES_DIV_512;
+        bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDCNFG, cnfg);
+
+        wdog_register(sc, geodesc_wdogctl_cb);
+}
+
+int
+geodesc_wdogctl_cb(void *self, int period)
+{
+        struct geodesc_softc *sc = self;
+        
+        if (period > 0x03ff)
+                period = 0x03ff;
+        bus_space_write_2(sc->sc_iot, sc->sc_ioh, GCB_WDTO, period * 64);
+        return (period);
+}