718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
275 lines
6.9 KiB
C
275 lines
6.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010 Andreas Tobler
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/callout.h>
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#include <sys/conf.h>
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#include <sys/cpu.h>
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#include <sys/ctype.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/limits.h>
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#include <machine/bus.h>
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#include <machine/md_var.h>
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#include <dev/iicbus/iicbus.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <powerpc/powermac/powermac_thermal.h>
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/* Drivebay sensor: LM75/DS1775. */
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#define DS1775_TEMP 0x0
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/* Regular bus attachment functions */
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static int ds1775_probe(device_t);
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static int ds1775_attach(device_t);
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struct ds1775_softc {
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struct pmac_therm sc_sensor;
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device_t sc_dev;
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struct intr_config_hook enum_hook;
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uint32_t sc_addr;
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};
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/* Utility functions */
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static int ds1775_sensor_read(struct ds1775_softc *sc);
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static int ds1775_sensor_sysctl(SYSCTL_HANDLER_ARGS);
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static void ds1775_start(void *xdev);
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static int ds1775_read_2(device_t dev, uint32_t addr, uint8_t reg,
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uint16_t *data);
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static device_method_t ds1775_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ds1775_probe),
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DEVMETHOD(device_attach, ds1775_attach),
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{ 0, 0 },
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};
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static driver_t ds1775_driver = {
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"ds1775",
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ds1775_methods,
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sizeof(struct ds1775_softc)
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};
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static devclass_t ds1775_devclass;
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DRIVER_MODULE(ds1775, iicbus, ds1775_driver, ds1775_devclass, 0, 0);
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static int
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ds1775_read_2(device_t dev, uint32_t addr, uint8_t reg, uint16_t *data)
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{
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uint8_t buf[4];
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int err, try = 0;
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struct iic_msg msg[2] = {
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{ addr, IIC_M_WR | IIC_M_NOSTOP, 1, ® },
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{ addr, IIC_M_RD, 2, buf },
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};
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for (;;)
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{
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err = iicbus_transfer(dev, msg, 2);
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if (err != 0)
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goto retry;
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*data = *((uint16_t*)buf);
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return (0);
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retry:
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if (++try > 5) {
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device_printf(dev, "iicbus read failed\n");
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return (-1);
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}
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pause("ds1775_read_2", hz);
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}
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}
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static int
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ds1775_probe(device_t dev)
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{
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const char *name, *compatible;
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struct ds1775_softc *sc;
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name = ofw_bus_get_name(dev);
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compatible = ofw_bus_get_compat(dev);
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if (!name)
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return (ENXIO);
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if (strcmp(name, "temp-monitor") != 0 ||
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(strcmp(compatible, "ds1775") != 0 &&
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strcmp(compatible, "lm75") != 0))
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return (ENXIO);
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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sc->sc_addr = iicbus_get_addr(dev);
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device_set_desc(dev, "Temp-Monitor DS1775");
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return (0);
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}
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static int
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ds1775_attach(device_t dev)
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{
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struct ds1775_softc *sc;
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sc = device_get_softc(dev);
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sc->enum_hook.ich_func = ds1775_start;
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sc->enum_hook.ich_arg = dev;
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/* We have to wait until interrupts are enabled. I2C read and write
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* only works if the interrupts are available.
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* The unin/i2c is controlled by the htpic on unin. But this is not
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* the master. The openpic on mac-io is controlling the htpic.
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* This one gets attached after the mac-io probing and then the
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* interrupts will be available.
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*/
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if (config_intrhook_establish(&sc->enum_hook) != 0)
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return (ENOMEM);
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return (0);
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}
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static void
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ds1775_start(void *xdev)
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{
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phandle_t child;
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struct ds1775_softc *sc;
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struct sysctl_oid *oid, *sensroot_oid;
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struct sysctl_ctx_list *ctx;
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ssize_t plen;
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int i;
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char sysctl_name[40], sysctl_desc[40];
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device_t dev = (device_t)xdev;
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sc = device_get_softc(dev);
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child = ofw_bus_get_node(dev);
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ctx = device_get_sysctl_ctx(dev);
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sensroot_oid = SYSCTL_ADD_NODE(ctx,
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensor",
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CTLFLAG_RD, 0, "DS1775 Sensor Information");
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if (OF_getprop(child, "hwsensor-zone", &sc->sc_sensor.zone,
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sizeof(int)) < 0)
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sc->sc_sensor.zone = 0;
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plen = OF_getprop(child, "hwsensor-location", sc->sc_sensor.name,
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sizeof(sc->sc_sensor.name));
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if (plen == -1) {
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strcpy(sysctl_name, "sensor");
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} else {
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for (i = 0; i < strlen(sc->sc_sensor.name); i++) {
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sysctl_name[i] = tolower(sc->sc_sensor.name[i]);
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if (isspace(sysctl_name[i]))
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sysctl_name[i] = '_';
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}
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sysctl_name[i] = 0;
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}
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/* Make up target temperatures. These are low, for the drive bay. */
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if (sc->sc_sensor.zone == 0) {
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sc->sc_sensor.target_temp = 500 + ZERO_C_TO_K;
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sc->sc_sensor.max_temp = 600 + ZERO_C_TO_K;
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}
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else {
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sc->sc_sensor.target_temp = 300 + ZERO_C_TO_K;
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sc->sc_sensor.max_temp = 600 + ZERO_C_TO_K;
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}
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sc->sc_sensor.read =
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(int (*)(struct pmac_therm *sc))(ds1775_sensor_read);
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pmac_thermal_sensor_register(&sc->sc_sensor);
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sprintf(sysctl_desc,"%s %s", sc->sc_sensor.name, "(C)");
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oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sensroot_oid),
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OID_AUTO, sysctl_name, CTLFLAG_RD, 0,
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"Sensor Information");
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "temp",
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CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev,
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0, ds1775_sensor_sysctl, "IK", sysctl_desc);
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config_intrhook_disestablish(&sc->enum_hook);
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}
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static int
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ds1775_sensor_read(struct ds1775_softc *sc)
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{
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uint16_t buf[2];
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uint16_t read;
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int err;
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err = ds1775_read_2(sc->sc_dev, sc->sc_addr, DS1775_TEMP, buf);
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if (err < 0)
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return (-1);
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read = *((int16_t *)buf);
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/* The default mode of the ADC is 9 bit, the resolution is 0.5 C per
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bit. The temperature is in tenth kelvin.
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*/
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return (((int16_t)(read) >> 7) * 5 + ZERO_C_TO_K);
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}
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static int
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ds1775_sensor_sysctl(SYSCTL_HANDLER_ARGS)
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{
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device_t dev;
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struct ds1775_softc *sc;
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int error;
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int temp;
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dev = arg1;
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sc = device_get_softc(dev);
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temp = ds1775_sensor_read(sc);
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if (temp < 0)
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return (EIO);
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error = sysctl_handle_int(oidp, &temp, 0, req);
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return (error);
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}
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