svn commit: r208842 - in head/sys: conf powerpc/powermac
Nathan Whitehorn
nwhitehorn at FreeBSD.org
Sat Jun 5 17:51:37 UTC 2010
Author: nwhitehorn
Date: Sat Jun 5 17:51:37 2010
New Revision: 208842
URL: http://svn.freebsd.org/changeset/base/208842
Log:
Add a driver for the CPU temperature sensors attached over I2C on the
PowerMac 11,2.
Added:
head/sys/powerpc/powermac/smusat.c (contents, props changed)
Modified:
head/sys/conf/files.powerpc
Modified: head/sys/conf/files.powerpc
==============================================================================
--- head/sys/conf/files.powerpc Sat Jun 5 17:50:20 2010 (r208841)
+++ head/sys/conf/files.powerpc Sat Jun 5 17:51:37 2010 (r208842)
@@ -139,6 +139,7 @@ powerpc/powermac/openpic_macio.c optiona
powerpc/powermac/pswitch.c optional powermac pswitch
powerpc/powermac/pmu.c optional powermac pmu
powerpc/powermac/smu.c optional powermac smu
+powerpc/powermac/smusat.c optional powermac smu
powerpc/powermac/uninorth.c optional powermac
powerpc/powermac/uninorthpci.c optional powermac pci
powerpc/powermac/vcoregpio.c optional powermac
Added: head/sys/powerpc/powermac/smusat.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/powerpc/powermac/smusat.c Sat Jun 5 17:51:37 2010 (r208842)
@@ -0,0 +1,262 @@
+/*-
+ * Copyright (c) 2010 Nathan Whitehorn
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN 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.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/cpu.h>
+#include <sys/ctype.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+
+#include <dev/iicbus/iicbus.h>
+#include <dev/iicbus/iiconf.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/openfirm.h>
+
+struct smu_sensor {
+ cell_t reg;
+ char location[32];
+ enum {
+ SMU_CURRENT_SENSOR,
+ SMU_VOLTAGE_SENSOR,
+ SMU_POWER_SENSOR,
+ SMU_TEMP_SENSOR
+ } type;
+};
+
+static int smusat_probe(device_t);
+static int smusat_attach(device_t);
+static int smusat_sensor_sysctl(SYSCTL_HANDLER_ARGS);
+
+MALLOC_DEFINE(M_SMUSAT, "smusat", "SMU Sattelite Sensors");
+
+static device_method_t smusat_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, smusat_probe),
+ DEVMETHOD(device_attach, smusat_attach),
+ { 0, 0 },
+};
+
+struct smusat_softc {
+ struct smu_sensor *sc_sensors;
+ int sc_nsensors;
+
+ uint8_t sc_cache[16];
+ time_t sc_last_update;
+};
+
+static driver_t smusat_driver = {
+ "smusat",
+ smusat_methods,
+ sizeof(struct smusat_softc)
+};
+
+static devclass_t smusat_devclass;
+
+DRIVER_MODULE(smusat, iicbus, smusat_driver, smusat_devclass, 0, 0);
+
+static int
+smusat_probe(device_t dev)
+{
+ const char *compat = ofw_bus_get_compat(dev);
+
+ if (compat == NULL || strcmp(compat, "smu-sat") != 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "SMU Satellite Sensors");
+ return (0);
+}
+
+static int
+smusat_attach(device_t dev)
+{
+ phandle_t child;
+ struct smu_sensor *sens;
+ struct smusat_softc *sc;
+ struct sysctl_oid *sensroot_oid;
+ struct sysctl_ctx_list *ctx;
+ char type[32];
+ int i;
+
+ sc = device_get_softc(dev);
+ sc->sc_nsensors = 0;
+ sc->sc_last_update = 0;
+
+ for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
+ child = OF_peer(child))
+ sc->sc_nsensors++;
+
+ if (sc->sc_nsensors == 0) {
+ device_printf(dev, "WARNING: No sensors detected!\n");
+ return (-1);
+ }
+
+ sc->sc_sensors = malloc(sc->sc_nsensors * sizeof(struct smu_sensor),
+ M_SMUSAT, M_WAITOK | M_ZERO);
+
+ sens = sc->sc_sensors;
+ sc->sc_nsensors = 0;
+
+ ctx = device_get_sysctl_ctx(dev);
+ sensroot_oid = device_get_sysctl_tree(dev);
+
+ for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
+ child = OF_peer(child)) {
+ char sysctl_name[40], sysctl_desc[40];
+ const char *units;
+
+ sens->reg = 0;
+ OF_getprop(child, "reg", &sens->reg, sizeof(sens->reg));
+ if (sens->reg < 0x30)
+ continue;
+
+ sens->reg -= 0x30;
+ OF_getprop(child, "location", sens->location,
+ sizeof(sens->location));
+
+ OF_getprop(child, "device_type", type, sizeof(type));
+
+ if (strcmp(type, "current-sensor") == 0) {
+ sens->type = SMU_CURRENT_SENSOR;
+ units = "mA";
+ } else if (strcmp(type, "temp-sensor") == 0) {
+ sens->type = SMU_TEMP_SENSOR;
+ units = "C";
+ } else if (strcmp(type, "voltage-sensor") == 0) {
+ sens->type = SMU_VOLTAGE_SENSOR;
+ units = "mV";
+ } else if (strcmp(type, "power-sensor") == 0) {
+ sens->type = SMU_POWER_SENSOR;
+ units = "mW";
+ } else {
+ continue;
+ }
+
+ for (i = 0; i < strlen(sens->location); i++) {
+ sysctl_name[i] = tolower(sens->location[i]);
+ if (isspace(sysctl_name[i]))
+ sysctl_name[i] = '_';
+ }
+ sysctl_name[i] = 0;
+
+ sprintf(sysctl_desc,"%s (%s)", sens->location, units);
+ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensroot_oid), OID_AUTO,
+ sysctl_name, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev,
+ sc->sc_nsensors, smusat_sensor_sysctl, "I", sysctl_desc);
+
+ sens++;
+ sc->sc_nsensors++;
+ }
+
+ return (0);
+}
+
+static int
+smusat_updatecache(device_t dev)
+{
+ uint8_t reg = 0x3f;
+ struct smusat_softc *sc = device_get_softc(dev);
+ struct iic_msg msgs[2] = {
+ {0, IIC_M_WR | IIC_M_NOSTOP, 1, ®},
+ {0, IIC_M_RD, 16, sc->sc_cache},
+ };
+
+ msgs[0].slave = msgs[1].slave = iicbus_get_addr(dev);
+ sc->sc_last_update = time_uptime;
+
+ return (iicbus_transfer(dev, msgs, 2));
+}
+
+static int
+smusat_sensor_read(device_t dev, struct smu_sensor *sens, int *val)
+{
+ int value;
+ struct smusat_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (time_uptime - sc->sc_last_update > 1)
+ smusat_updatecache(dev);
+
+ value = (sc->sc_cache[sens->reg*2] << 8) +
+ sc->sc_cache[sens->reg*2 + 1];
+
+ switch (sens->type) {
+ case SMU_TEMP_SENSOR:
+ /* 16.16 */
+ value <<= 10;
+ /* Kill the .16 */
+ value >>= 16;
+ break;
+ case SMU_VOLTAGE_SENSOR:
+ /* 16.16 */
+ value <<= 4;
+ /* Kill the .16 */
+ value >>= 16;
+ break;
+ case SMU_CURRENT_SENSOR:
+ /* 16.16 */
+ value <<= 8;
+ /* Kill the .16 */
+ value >>= 16;
+ break;
+ case SMU_POWER_SENSOR:
+ /* Doesn't exist */
+ break;
+ }
+
+ *val = value;
+ return (0);
+}
+
+static int
+smusat_sensor_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ device_t dev;
+ struct smusat_softc *sc;
+ struct smu_sensor *sens;
+ int value, error;
+
+ dev = arg1;
+ sc = device_get_softc(dev);
+ sens = &sc->sc_sensors[arg2];
+
+ error = smusat_sensor_read(dev, sens, &value);
+ if (error != 0)
+ return (error);
+
+ error = sysctl_handle_int(oidp, &value, 0, req);
+
+ return (error);
+}
+
More information about the svn-src-all
mailing list