7029da5c36
r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are still not MPSAFE (or already are but aren’t properly marked). Use it in preparation for a general review of all nodes. This is non-functional change that adds annotations to SYSCTL_NODE and SYSCTL_PROC nodes using one of the soon-to-be-required flags. Mark all obvious cases as MPSAFE. All entries that haven't been marked as MPSAFE before are by default marked as NEEDGIANT Approved by: kib (mentor, blanket) Commented by: kib, gallatin, melifaro Differential Revision: https://reviews.freebsd.org/D23718
183 lines
4.6 KiB
C
183 lines
4.6 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2012 Hiroki Sato <hrs@FreeBSD.org>
|
|
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* Driver for on-die thermal sensor in 88F6282 and 88F6283.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <arm/mv/mvreg.h>
|
|
#include <arm/mv/mvvar.h>
|
|
|
|
static struct resource_spec mvts_res[] = {
|
|
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
|
|
{ -1, 0 }
|
|
};
|
|
|
|
struct mvts_softc {
|
|
device_t sc_dev;
|
|
struct resource *sc_res[sizeof(mvts_res)];
|
|
};
|
|
|
|
static int
|
|
ts_probe(device_t dev)
|
|
{
|
|
uint32_t d, r;
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (!ofw_bus_is_compatible(dev, "mrvl,ts"))
|
|
return (ENXIO);
|
|
soc_id(&d, &r);
|
|
switch (d) {
|
|
case MV_DEV_88F6282:
|
|
break;
|
|
default:
|
|
device_printf(dev, "unsupported SoC (ID: 0x%08X)!\n", d);
|
|
return (ENXIO);
|
|
}
|
|
device_set_desc(dev, "Marvell Thermal Sensor");
|
|
|
|
return (0);
|
|
}
|
|
|
|
#define MV_TEMP_VALID_BIT (1 << 9)
|
|
#define MV_TEMP_SENS_OFFS 10
|
|
#define MV_TEMP_SENS_MASK 0x1ff
|
|
#define MV_TEMP_SENS_READ_MAX 16
|
|
#define TZ_ZEROC 2731
|
|
#define MV_TEMP_CONVERT(x) ((((322 - x) * 100000) / 13625) + TZ_ZEROC)
|
|
|
|
/*
|
|
* MSB LSB
|
|
* 0000 0000 0000 0000 0000 0000 0000 0000
|
|
* ^- valid bit
|
|
* |---------|
|
|
* ^--- temperature (9 bits)
|
|
*/
|
|
|
|
static int
|
|
ts_sysctl_handler(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct mvts_softc *sc;
|
|
device_t dev;
|
|
uint32_t ret, ret0;
|
|
u_int val;
|
|
int i;
|
|
|
|
dev = (device_t)arg1;
|
|
sc = device_get_softc(dev);
|
|
val = TZ_ZEROC;
|
|
|
|
ret = bus_read_4(sc->sc_res[0], 0);
|
|
if ((ret & MV_TEMP_VALID_BIT) == 0) {
|
|
device_printf(dev, "temperature sensor is broken.\n");
|
|
goto ts_sysctl_handle_int;
|
|
}
|
|
ret0 = 0;
|
|
for (i = 0; i < MV_TEMP_SENS_READ_MAX; i++) {
|
|
ret = bus_read_4(sc->sc_res[0], 0);
|
|
ret = (ret >> MV_TEMP_SENS_OFFS) & MV_TEMP_SENS_MASK;
|
|
|
|
/*
|
|
* Successive reads should returns the same value except
|
|
* for the LSB when the sensor is normal.
|
|
*/
|
|
if (((ret0 ^ ret) & 0x1fe) == 0)
|
|
break;
|
|
else
|
|
ret0 = ret;
|
|
}
|
|
if (i == MV_TEMP_SENS_READ_MAX) {
|
|
device_printf(dev, "temperature sensor is unstable.\n");
|
|
goto ts_sysctl_handle_int;
|
|
}
|
|
val = (u_int)MV_TEMP_CONVERT(ret);
|
|
|
|
ts_sysctl_handle_int:
|
|
return (sysctl_handle_int(oidp, &val, 0, req));
|
|
}
|
|
|
|
static int
|
|
ts_attach(device_t dev)
|
|
{
|
|
struct mvts_softc *sc;
|
|
struct sysctl_ctx_list *ctx;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->sc_dev = dev;
|
|
error = bus_alloc_resources(dev, mvts_res, sc->sc_res);
|
|
if (error) {
|
|
device_printf(dev, "could not allocate resources\n");
|
|
return (ENXIO);
|
|
}
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
|
|
OID_AUTO, "temperature",
|
|
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, dev,
|
|
0, ts_sysctl_handler, "IK", "Current Temperature");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ts_detach(device_t dev)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t ts_methods[] = {
|
|
DEVMETHOD(device_probe, ts_probe),
|
|
DEVMETHOD(device_attach, ts_attach),
|
|
DEVMETHOD(device_detach, ts_detach),
|
|
{0, 0},
|
|
};
|
|
|
|
static driver_t ts_driver = {
|
|
"mvts",
|
|
ts_methods,
|
|
sizeof(struct mvts_softc),
|
|
};
|
|
|
|
static devclass_t ts_devclass;
|
|
DRIVER_MODULE(mvts, simplebus, ts_driver, ts_devclass, 0, 0);
|
|
MODULE_VERSION(mvts, 1);
|