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authorMark Kettenis <kettenis@cvs.openbsd.org>2009-09-19 19:37:43 +0000
committerMark Kettenis <kettenis@cvs.openbsd.org>2009-09-19 19:37:43 +0000
commitdc3a8ded80720d43840f949cc2140741d4bf734c (patch)
tree794574da2ab59fff26ecac7cd83b2a81094113cb
parent742ccd187ed5f1294119f82a23a55e640d3e42e1 (diff)
Initial stab at a driver for LOMlite2 as found on the Sun Fire V100, Sun Fire
V120 and Sun Netra X1. For now this only provides a temperature sensor, but more stuff will follow.
-rw-r--r--sys/arch/sparc64/conf/GENERIC3
-rw-r--r--sys/arch/sparc64/conf/files.sparc646
-rw-r--r--sys/arch/sparc64/dev/lom.c166
3 files changed, 173 insertions, 2 deletions
diff --git a/sys/arch/sparc64/conf/GENERIC b/sys/arch/sparc64/conf/GENERIC
index dfead45fc6d..d597bd042ee 100644
--- a/sys/arch/sparc64/conf/GENERIC
+++ b/sys/arch/sparc64/conf/GENERIC
@@ -1,4 +1,4 @@
-# $OpenBSD: GENERIC,v 1.243 2009/09/01 19:15:42 kettenis Exp $
+# $OpenBSD: GENERIC,v 1.244 2009/09/19 19:37:42 kettenis Exp $
#
# For further information on compiling OpenBSD kernels, see the config(8)
# man page.
@@ -312,6 +312,7 @@ lpt* at ebus?
bbc* at ebus?
led* at ebus?
+lom* at ebus?
pmc* at ebus?
ppm* at ebus?
diff --git a/sys/arch/sparc64/conf/files.sparc64 b/sys/arch/sparc64/conf/files.sparc64
index ac70dfdf778..3ff06f05cc6 100644
--- a/sys/arch/sparc64/conf/files.sparc64
+++ b/sys/arch/sparc64/conf/files.sparc64
@@ -1,4 +1,4 @@
-# $OpenBSD: files.sparc64,v 1.126 2009/07/05 17:13:25 kettenis Exp $
+# $OpenBSD: files.sparc64,v 1.127 2009/09/19 19:37:42 kettenis Exp $
# $NetBSD: files.sparc64,v 1.50 2001/08/10 20:53:50 eeh Exp $
# maxpartitions must be first item in files.${ARCH}
@@ -217,6 +217,10 @@ device led
attach led at ebus
file arch/sparc64/dev/led.c led
+device lom
+attach lom at ebus
+file arch/sparc64/dev/lom.c lom
+
device pmc
attach pmc at ebus
file arch/sparc64/dev/pmc.c pmc
diff --git a/sys/arch/sparc64/dev/lom.c b/sys/arch/sparc64/dev/lom.c
new file mode 100644
index 00000000000..48a4c9e395e
--- /dev/null
+++ b/sys/arch/sparc64/dev/lom.c
@@ -0,0 +1,166 @@
+/* $OpenBSD: lom.c,v 1.1 2009/09/19 19:37:42 kettenis Exp $ */
+/*
+ * Copyright (c) 2008 Mark Kettenis
+ *
+ * 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/device.h>
+#include <sys/sensors.h>
+#include <sys/systm.h>
+
+#include <machine/autoconf.h>
+#include <machine/openfirm.h>
+
+#include <sparc64/dev/ebusreg.h>
+#include <sparc64/dev/ebusvar.h>
+
+/*
+ * The LOM is implemented as a H8/3437 microcontroller which has its
+ * on-chip host interface hooked up to EBus.
+ */
+#define LOM_DATA 0x00 /* R/W */
+#define LOM_CMD 0x01 /* W */
+#define LOM_STATUS 0x01 /* R */
+#define LOM_STATUS_OBF 0x01 /* Output Buffer Full */
+#define LOM_STATUS_IBF 0x02 /* Input Buffer Full */
+
+#define LOM_IDX_FW_REV 0x01 /* Firmware revision */
+
+#define LOM_IDX_TEMP1 0x18 /* Temperature */
+
+#define LOM_IDX_PROBE55 0x7e /* Always returns 0x55 */
+#define LOM_IDX_PROBEAA 0x7f /* Always returns 0xaa */
+
+struct lom_softc {
+ struct device sc_dev;
+ bus_space_tag_t sc_iot;
+ bus_space_handle_t sc_ioh;
+
+ struct ksensor sc_sensor;
+ struct ksensordev sc_sensordev;
+};
+
+int lom_match(struct device *, void *, void *);
+void lom_attach(struct device *, struct device *, void *);
+
+struct cfattach lom_ca = {
+ sizeof(struct lom_softc), lom_match, lom_attach
+};
+
+struct cfdriver lom_cd = {
+ NULL, "lom", DV_DULL
+};
+
+int lom_read(struct lom_softc *, uint8_t, uint8_t *);
+int lom_write(struct lom_softc *, uint8_t, uint8_t);
+
+void lom_refresh(void *);
+
+int
+lom_match(struct device *parent, void *match, void *aux)
+{
+ struct ebus_attach_args *ea = aux;
+
+ if (strcmp(ea->ea_name, "SUNW,lomh") == 0)
+ return (1);
+
+ return (0);
+}
+
+void
+lom_attach(struct device *parent, struct device *self, void *aux)
+{
+ struct lom_softc *sc = (void *)self;
+ struct ebus_attach_args *ea = aux;
+ uint8_t reg, fw_rev;
+
+ sc->sc_iot = ea->ea_memtag;
+ if (ebus_bus_map(ea->ea_memtag, 0,
+ EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
+ ea->ea_regs[0].size, 0, 0, &sc->sc_ioh)) {
+ printf(": can't map register space\n");
+ return;
+ }
+
+ if (lom_read(sc, LOM_IDX_PROBE55, &reg) || reg != 0x55 ||
+ lom_read(sc, LOM_IDX_PROBEAA, &reg) || reg != 0xaa ||
+ lom_read(sc, LOM_IDX_FW_REV, &fw_rev)) {
+ printf(": not responding\n");
+ return;
+ }
+
+ /* Initialize sensor data. */
+ strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
+ sizeof(sc->sc_sensordev.xname));
+ sc->sc_sensor.type = SENSOR_TEMP;
+
+ sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
+
+ if (sensor_task_register(sc, lom_refresh, 5) == NULL) {
+ printf(": unable to register update task\n");
+ return;
+ }
+
+ sensordev_install(&sc->sc_sensordev);
+
+ printf(": rev %d.%d\n", fw_rev >> 4, fw_rev & 0x0f);
+}
+
+int
+lom_read(struct lom_softc *sc, uint8_t reg, uint8_t *val)
+{
+ uint8_t str;
+ int i;
+
+ /* Wait for input buffer to become available. */
+ for (i = 1000; i > 0; i--) {
+ str = bus_space_read_1(sc->sc_iot, sc->sc_ioh, LOM_STATUS);
+ delay(10);
+ if ((str & LOM_STATUS_IBF) == 0)
+ break;
+ }
+ if (i == 0)
+ return (ETIMEDOUT);
+
+ bus_space_write_1(sc->sc_iot, sc->sc_ioh, LOM_CMD, reg);
+
+ /* Wait until the microcontroller fills output buffer. */
+ for (i = 1000; i > 0; i--) {
+ str = bus_space_read_1(sc->sc_iot, sc->sc_ioh, LOM_STATUS);
+ delay(10);
+ if (str & 0x01)
+ break;
+ }
+ if (i == 0)
+ return (ETIMEDOUT);
+
+ *val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, LOM_DATA);
+ return (0);
+}
+
+void
+lom_refresh(void *arg)
+{
+ struct lom_softc *sc = arg;
+ uint8_t val;
+
+ if (lom_read(sc, LOM_IDX_TEMP1, &val)) {
+ sc->sc_sensor.flags |= SENSOR_FINVALID;
+ return;
+ }
+
+ sc->sc_sensor.value = val * 1000000 + 273150000;
+ sc->sc_sensor.flags &= ~SENSOR_FINVALID;
+}