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/* $OpenBSD: environ.c,v 1.1 2008/01/18 20:12:38 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.
*/
/*
* Driver for environment device on Enterprise 3000/4000/5000/6000
* and Enterprise 3500/4500/5500/6500.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/sensors.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <sparc64/dev/fhcvar.h>
struct environ_softc {
struct device sc_dv;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct ksensor sc_sensor;
struct ksensordev sc_sensordev;
};
int environ_match(struct device *, void *, void *);
void environ_attach(struct device *, struct device *, void *);
void environ_refresh(void *);
struct cfattach environ_ca = {
sizeof(struct environ_softc), environ_match, environ_attach
};
struct cfdriver environ_cd = {
NULL, "environ", DV_DULL
};
int
environ_match(struct device *parent, void *cf, void *aux)
{
struct fhc_attach_args *fa = aux;
if (strcmp("environment", fa->fa_name) == 0)
return (1);
return (0);
}
void
environ_attach(struct device *parent, struct device *self, void *aux)
{
struct environ_softc *sc = (void *)self;
struct fhc_attach_args *fa = aux;
sc->sc_iot = fa->fa_bustag;
if (fhc_bus_map(sc->sc_iot, fa->fa_reg[0].fbr_slot,
fa->fa_reg[0].fbr_offset, fa->fa_reg[0].fbr_size, 0,
&sc->sc_ioh)) {
printf(": can't map registers\n");
return;
}
/* First reading allegedly gives garbage. */
bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0);
delay(30);
/* Initialize sensor data. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dv.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, environ_refresh, 5) == NULL) {
printf(": unable to register update task\n");
return;
}
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
/*
* Calibration table for 2nd generation CPU boards.
*/
int8_t environ_cpu2_temp[] = {
-17, -16, -15, -14, -13, -12, -11, -10,
-9, -8, -7, -6, -5, -4, -3, -2,
-1, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 11, 12, 13, 13,
14, 15, 16, 16, 17, 18, 18, 19,
20, 20, 21, 22, 22, 23, 24, 24,
25, 25, 26, 26, 27, 27, 28, 28,
29, 30, 30, 31, 31, 32, 32, 33,
33, 34, 34, 35, 35, 36, 36, 37,
37, 37, 38, 38, 39, 39, 40, 40,
41, 41, 42, 42, 43, 43, 43, 44,
44, 45, 45, 46, 46, 46, 47, 47,
48, 48, 49, 49, 50, 50, 50, 51,
51, 52, 52, 53, 53, 53, 54, 54,
55, 55, 56, 56, 56, 57, 57, 58,
58, 59, 59, 59, 60, 60, 61, 61,
62, 62, 63, 63, 63, 64, 64, 65,
65, 66, 66, 67, 67, 68, 68, 68,
69, 69, 70, 70, 71, 71, 72, 72,
73, 73, 74, 74, 75, 75, 76, 76,
77, 77, 78, 78, 79, 79, 80, 80,
81, 81, 82, 83, 83, 84, 84, 85,
85, 86, 87, 87, 88, 88, 89, 90,
90, 91, 92, 92, 93, 94, 94, 95,
96, 96, 97, 98, 99, 99, 100, 101,
102, 103, 103, 104, 105, 106, 107, 108,
109, 110
};
void
environ_refresh(void *arg)
{
struct environ_softc *sc = arg;
u_int8_t val;
int8_t temp;
val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0);
if (val == 0xff) {
sc->sc_sensor.flags |= SENSOR_FINVALID;
return;
}
if (val < sizeof(environ_cpu2_temp))
temp = environ_cpu2_temp[val];
else
temp = 110;
sc->sc_sensor.value = val * 1000000 + 273150000;
sc->sc_sensor.flags &= ~SENSOR_FINVALID;
}
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