2 * Copyright (C) 2018 Justin Hibbits
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
18 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
19 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
20 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
21 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
22 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 #include <sys/cdefs.h>
26 #include <sys/param.h>
27 #include <sys/kernel.h>
29 #include <sys/module.h>
30 #include <sys/mutex.h>
32 #include <sys/sysctl.h>
33 #include <sys/systm.h>
34 #include <sys/endian.h>
39 #include <machine/bus.h>
41 #include <dev/ofw/openfirm.h>
42 #include <dev/ofw/ofw_bus.h>
43 #include <dev/ofw/ofw_bus_subr.h>
47 struct opal_sensor_softc {
51 uint32_t sc_min_handle;
52 uint32_t sc_max_handle;
57 #define SENSOR_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
58 #define SENSOR_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
59 #define SENSOR_LOCK_INIT(_sc) \
60 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
61 "opal-sensor", MTX_DEF)
64 * A bit confusing, maybe. There are two types of nodes with compatible strings
65 * of "ibm,opal-sensor". One hangs off /ibm,opal/, named "sensors", the other
66 * hangs off of this node. For newbus attachments, we have one node (opalsens)
67 * attach from opal0, and the others (opal_sensor) attach from opalsens. These
68 * are the real sensors.
70 enum opal_sensor_type {
71 OPAL_SENSOR_TEMP = 0, /* From OPAL: degC */
72 OPAL_SENSOR_FAN = 1, /* From OPAL: RPM */
73 OPAL_SENSOR_POWER = 2, /* From OPAL: W */
74 OPAL_SENSOR_IN = 3, /* From OPAL: mV */
75 OPAL_SENSOR_ENERGY = 4, /* From OPAL: uJ */
76 OPAL_SENSOR_CURR = 5, /* From OPAL: mA */
80 /* This must be kept sorted with the enum above. */
81 const char *opal_sensor_types[] = {
91 * Retrieve the raw value from OPAL. This will be cooked by the sysctl handler.
94 opal_sensor_get_val(struct opal_sensor_softc *sc, uint32_t key, uint64_t *val)
100 token = opal_alloc_async_token();
102 rv = opal_call(OPAL_SENSOR_READ, key, token, vtophys(&val32));
104 if (rv == OPAL_ASYNC_COMPLETION) {
105 /* Sleep a little to let things settle. */
107 bzero(&msg, sizeof(msg));
108 rv = opal_wait_completion(&msg, sizeof(msg), token);
110 if (rv == OPAL_SUCCESS)
111 val32 = msg.params[0];
115 if (rv == OPAL_SUCCESS)
116 *val = be32toh(val32);
120 opal_free_async_token(token);
125 opal_sensor_sysctl(SYSCTL_HANDLER_ARGS)
127 struct opal_sensor_softc *sc;
135 error = opal_sensor_get_val(sc, sensor, &sensval);
142 switch (sc->sc_type) {
143 case OPAL_SENSOR_TEMP:
144 result = result * 10 + 2731; /* Convert to K */
146 case OPAL_SENSOR_POWER:
147 result = result * 1000; /* Convert to mW */
151 error = sysctl_handle_int(oidp, &result, 0, req);
157 opal_sensor_probe(device_t dev)
159 if (!ofw_bus_is_compatible(dev, "ibm,opal-sensor"))
162 device_set_desc(dev, "OPAL sensor");
163 return (BUS_PROBE_GENERIC);
167 opal_sensor_attach(device_t dev)
169 struct opal_sensor_softc *sc;
170 struct sysctl_ctx_list *ctx;
171 struct sysctl_oid *tree;
177 sc = device_get_softc(dev);
180 node = ofw_bus_get_node(dev);
182 if (OF_getencprop(node, "sensor-data", &sensor_id, sizeof(sensor_id)) < 0) {
183 device_printf(dev, "Missing sensor ID\n");
186 if (OF_getprop(node, "sensor-type", type, sizeof(type)) < 0) {
187 device_printf(dev, "Missing sensor type\n");
192 for (i = 0; i < OPAL_SENSOR_MAX; i++) {
193 if (strcmp(type, opal_sensor_types[i]) == 0) {
198 if (sc->sc_type == -1) {
199 device_printf(dev, "Unknown sensor type '%s'\n", type);
203 ctx = device_get_sysctl_ctx(dev);
204 tree = device_get_sysctl_tree(dev);
206 sc->sc_handle = sensor_id;
207 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
208 "sensor", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
209 sensor_id, opal_sensor_sysctl,
210 (sc->sc_type == OPAL_SENSOR_TEMP) ? "IK" : "I", "current value");
212 SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "type",
213 CTLFLAG_RD, __DECONST(char *, opal_sensor_types[sc->sc_type]),
216 OF_getprop_alloc(node, "label", (void **)&sc->sc_label);
217 SYSCTL_ADD_STRING(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "label",
218 CTLFLAG_RD, sc->sc_label, 0, "");
220 if (OF_getencprop(node, "sensor-data-min",
221 &sensor_id, sizeof(sensor_id)) > 0) {
222 sc->sc_min_handle = sensor_id;
223 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
224 "sensor_min", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
225 sc, sensor_id, opal_sensor_sysctl,
226 (sc->sc_type == OPAL_SENSOR_TEMP) ? "IK" : "I",
230 if (OF_getencprop(node, "sensor-data-max",
231 &sensor_id, sizeof(sensor_id)) > 0) {
232 sc->sc_max_handle = sensor_id;
233 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
234 "sensor_max", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
235 sc, sensor_id, opal_sensor_sysctl,
236 (sc->sc_type == OPAL_SENSOR_TEMP) ? "IK" : "I",
240 SENSOR_LOCK_INIT(sc);
245 static device_method_t opal_sensor_methods[] = {
246 DEVMETHOD(device_probe, opal_sensor_probe),
247 DEVMETHOD(device_attach, opal_sensor_attach),
250 static driver_t opal_sensor_driver = {
253 sizeof(struct opal_sensor_softc)
256 DRIVER_MODULE(opal_sensor, opalsens, opal_sensor_driver, NULL, NULL);
259 opalsens_probe(device_t dev)
262 if (!ofw_bus_is_compatible(dev, "ibm,opal-sensor"))
265 device_set_desc(dev, "OPAL Sensors");
266 return (BUS_PROBE_GENERIC);
270 opalsens_attach(device_t dev)
274 struct ofw_bus_devinfo *dinfo;
276 for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
277 child = OF_peer(child)) {
278 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO);
279 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
280 free(dinfo, M_DEVBUF);
283 cdev = device_add_child(dev, NULL, -1);
285 device_printf(dev, "<%s>: device_add_child failed\n",
287 ofw_bus_gen_destroy_devinfo(dinfo);
288 free(dinfo, M_DEVBUF);
291 device_set_ivars(cdev, dinfo);
294 return (bus_generic_attach(dev));
297 static const struct ofw_bus_devinfo *
298 opalsens_get_devinfo(device_t dev, device_t child)
300 return (device_get_ivars(child));
303 static device_method_t opalsens_methods[] = {
304 /* Device interface */
305 DEVMETHOD(device_probe, opalsens_probe),
306 DEVMETHOD(device_attach, opalsens_attach),
308 /* ofw_bus interface */
309 DEVMETHOD(ofw_bus_get_devinfo, opalsens_get_devinfo),
310 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
311 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
312 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
313 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
314 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
319 static driver_t opalsens_driver = {
325 DRIVER_MODULE(opalsens, opal, opalsens_driver, NULL, NULL);