665 lines
17 KiB
C
665 lines
17 KiB
C
/*-
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* Copyright (c) 2012 Andreas Tobler
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* Copyright (c) 2014 Justin Hibbits
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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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/* ADT746X registers. */
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#define ADT746X_TACH1LOW 0x28
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#define ADT746X_TACH1HIGH 0x29
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#define ADT746X_TACH2LOW 0x2a
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#define ADT746X_TACH2HIGH 0x2b
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#define ADT746X_PWM1 0x30
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#define ADT746X_PWM2 0x31
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#define ADT746X_DEVICE_ID 0x3d
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#define ADT746X_COMPANY_ID 0x3e
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#define ADT746X_REV_ID 0x3f
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#define ADT746X_CONFIG 0x40
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#define ADT746X_PWM1_CONF 0x5c
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#define ADT746X_PWM2_CONF 0x5d
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#define ADT746X_MANUAL_MASK 0xe0
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#define ADT7460_DEV_ID 0x27
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#define ADT7467_DEV_ID 0x68
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struct adt746x_fan {
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struct pmac_fan fan;
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device_t dev;
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int id;
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int setpoint;
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int pwm_reg;
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int conf_reg;
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};
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struct adt746x_sensor {
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struct pmac_therm therm;
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device_t dev;
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int id;
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cell_t reg;
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enum {
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ADT746X_SENSOR_TEMP,
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ADT746X_SENSOR_VOLT,
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ADT746X_SENSOR_SPEED
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} type;
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};
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struct adt746x_softc {
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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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/* The 7467 supports up to 4 fans, 2 voltage and 3 temperature sensors. */
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struct adt746x_fan sc_fans[4];
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int sc_nfans;
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struct adt746x_sensor sc_sensors[9];
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int sc_nsensors;
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int device_id;
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};
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/* Regular bus attachment functions */
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static int adt746x_probe(device_t);
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static int adt746x_attach(device_t);
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/* Utility functions */
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static void adt746x_attach_fans(device_t dev);
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static void adt746x_attach_sensors(device_t dev);
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static int adt746x_fill_fan_prop(device_t dev);
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static int adt746x_fill_sensor_prop(device_t dev);
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static int adt746x_fan_set_pwm(struct adt746x_fan *fan, int pwm);
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static int adt746x_fan_get_pwm(struct adt746x_fan *fan);
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static int adt746x_sensor_read(struct adt746x_sensor *sens);
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static void adt746x_start(void *xdev);
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/* i2c read/write functions. */
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static int adt746x_write(device_t dev, uint32_t addr, uint8_t reg,
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uint8_t *buf);
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static int adt746x_read(device_t dev, uint32_t addr, uint8_t reg,
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uint8_t *data);
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static device_method_t adt746x_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, adt746x_probe),
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DEVMETHOD(device_attach, adt746x_attach),
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{ 0, 0 },
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};
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static driver_t adt746x_driver = {
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"adt746x",
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adt746x_methods,
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sizeof(struct adt746x_softc)
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};
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static devclass_t adt746x_devclass;
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DRIVER_MODULE(adt746x, iicbus, adt746x_driver, adt746x_devclass, 0, 0);
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static MALLOC_DEFINE(M_ADT746X, "adt746x", "ADT Sensor Information");
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/* i2c read/write functions. */
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static int
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adt746x_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff)
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{
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uint8_t buf[4];
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int try = 0;
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struct iic_msg msg[] = {
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{addr, IIC_M_WR, 2, buf }
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};
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/* Prepare the write msg. */
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buf[0] = reg;
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memcpy(buf + 1, buff, 1);
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for (;;)
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{
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if (iicbus_transfer(dev, msg, 1) == 0)
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return (0);
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if (++try > 5) {
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device_printf(dev, "iicbus write failed\n");
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return (-1);
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}
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pause("adt746x_write", hz);
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}
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return (0);
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}
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static int
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adt746x_read(device_t dev, uint32_t addr, uint8_t reg, uint8_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, 1, 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 = *((uint8_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("adt746x_read", hz);
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}
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}
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static int
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adt746x_probe(device_t dev)
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{
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const char *name, *compatible;
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struct adt746x_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, "fan") != 0 ||
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(strcmp(compatible, "adt7460") != 0 &&
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strcmp(compatible, "adt7467") != 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, "Apple Thermostat Unit ADT746X");
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return (0);
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}
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static int
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adt746x_attach(device_t dev)
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{
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struct adt746x_softc *sc;
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sc = device_get_softc(dev);
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sc->enum_hook.ich_func = adt746x_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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adt746x_start(void *xdev)
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{
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uint8_t did, cid, rev, conf;
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struct adt746x_softc *sc;
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device_t dev = (device_t)xdev;
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sc = device_get_softc(dev);
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adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_DEVICE_ID, &did);
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adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_COMPANY_ID, &cid);
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adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_REV_ID, &rev);
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adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_CONFIG, &conf);
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device_printf(dev, "Dev ID %#x, Company ID %#x, Rev ID %#x CNF: %#x\n",
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did, cid, rev, conf);
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/* We can get the device id either from 'of' properties or from the chip
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itself. This method makes sure we can read the chip, otherwise
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we return. */
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sc->device_id = did;
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conf = 1;
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/* Start the ADT7460. */
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if (sc->device_id == ADT7460_DEV_ID)
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adt746x_write(sc->sc_dev, sc->sc_addr, ADT746X_CONFIG, &conf);
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/* Detect and attach child devices. */
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adt746x_attach_fans(dev);
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adt746x_attach_sensors(dev);
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config_intrhook_disestablish(&sc->enum_hook);
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}
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/*
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* Sensor and fan management
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*/
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static int
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adt746x_fan_set_pwm(struct adt746x_fan *fan, int pwm)
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{
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uint8_t reg = 0, manual, mode = 0;
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struct adt746x_softc *sc;
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uint8_t buf;
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sc = device_get_softc(fan->dev);
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/* Clamp to allowed range */
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pwm = max(fan->fan.min_rpm, pwm);
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pwm = min(fan->fan.max_rpm, pwm);
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reg = fan->pwm_reg;
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mode = fan->conf_reg;
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/* From the 7460 datasheet:
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PWM dutycycle can be programmed from 0% (0x00) to 100% (0xFF)
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in steps of 0.39% (256 steps).
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*/
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buf = (pwm * 100 / 39) - (pwm ? 1 : 0);
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fan->setpoint = buf;
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/* Manual mode. */
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adt746x_read(sc->sc_dev, sc->sc_addr, mode, &manual);
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manual |= ADT746X_MANUAL_MASK;
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adt746x_write(sc->sc_dev, sc->sc_addr, mode, &manual);
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/* Write speed. */
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adt746x_write(sc->sc_dev, sc->sc_addr, reg, &buf);
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return (0);
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}
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static int
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adt746x_fan_get_pwm(struct adt746x_fan *fan)
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{
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uint8_t buf, reg;
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uint16_t pwm;
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struct adt746x_softc *sc;
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sc = device_get_softc(fan->dev);
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reg = fan->pwm_reg;
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adt746x_read(sc->sc_dev, sc->sc_addr, reg, &buf);
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pwm = (buf * 39 / 100) + (buf ? 1 : 0);
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return (pwm);
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}
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static int
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adt746x_fill_fan_prop(device_t dev)
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{
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phandle_t child;
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struct adt746x_softc *sc;
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u_int *id;
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char *location;
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int i, id_len, len = 0, location_len, prev_len = 0;
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sc = device_get_softc(dev);
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child = ofw_bus_get_node(dev);
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/* Fill the fan location property. */
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location_len = OF_getprop_alloc(child, "hwctrl-location", 1, (void **)&location);
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id_len = OF_getprop_alloc(child, "hwctrl-id", sizeof(cell_t), (void **)&id);
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if (location_len == -1 || id_len == -1) {
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free(location, M_OFWPROP);
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free(id, M_OFWPROP);
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return 0;
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}
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/* Fill in all the properties for each fan. */
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for (i = 0; i < id_len; i++) {
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strlcpy(sc->sc_fans[i].fan.name, location + len, 32);
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prev_len = strlen(location + len) + 1;
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len += prev_len;
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sc->sc_fans[i].id = id[i];
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if (id[i] == 6) {
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sc->sc_fans[i].pwm_reg = ADT746X_PWM1;
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sc->sc_fans[i].conf_reg = ADT746X_PWM1_CONF;
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} else if (id[i] == 7) {
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sc->sc_fans[i].pwm_reg = ADT746X_PWM2;
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sc->sc_fans[i].conf_reg = ADT746X_PWM2_CONF;
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} else {
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sc->sc_fans[i].pwm_reg = ADT746X_PWM1 + i;
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sc->sc_fans[i].conf_reg = ADT746X_PWM1_CONF + i;
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}
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sc->sc_fans[i].dev = sc->sc_dev;
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sc->sc_fans[i].fan.min_rpm = 5; /* Percent */
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sc->sc_fans[i].fan.max_rpm = 100;
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sc->sc_fans[i].fan.read = NULL;
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sc->sc_fans[i].fan.set =
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(int (*)(struct pmac_fan *, int))(adt746x_fan_set_pwm);
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sc->sc_fans[i].fan.default_rpm = sc->sc_fans[i].fan.max_rpm;
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}
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free(location, M_OFWPROP);
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free(id, M_OFWPROP);
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return (i);
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}
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static int
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adt746x_fill_sensor_prop(device_t dev)
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{
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phandle_t child, node;
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struct adt746x_softc *sc;
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char sens_type[32];
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int i = 0, reg, sensid;
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sc = device_get_softc(dev);
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child = ofw_bus_get_node(dev);
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/* Fill in the sensor properties for each child. */
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for (node = OF_child(child); node != 0; node = OF_peer(node)) {
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if (OF_getprop(node, "sensor-id", &sensid, sizeof(sensid)) == -1)
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continue;
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OF_getprop(node, "location", sc->sc_sensors[i].therm.name, 32);
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OF_getprop(node, "device_type", sens_type, sizeof(sens_type));
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if (strcmp(sens_type, "temperature") == 0)
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sc->sc_sensors[i].type = ADT746X_SENSOR_TEMP;
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else if (strcmp(sens_type, "voltage") == 0)
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sc->sc_sensors[i].type = ADT746X_SENSOR_VOLT;
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else
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sc->sc_sensors[i].type = ADT746X_SENSOR_SPEED;
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OF_getprop(node, "reg", ®, sizeof(reg));
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OF_getprop(node, "sensor-id", &sensid,
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sizeof(sensid));
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/* This is the i2c register of the sensor. */
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sc->sc_sensors[i].reg = reg;
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sc->sc_sensors[i].id = sensid;
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OF_getprop(node, "zone", &sc->sc_sensors[i].therm.zone,
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sizeof(sc->sc_sensors[i].therm.zone));
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sc->sc_sensors[i].dev = dev;
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sc->sc_sensors[i].therm.read =
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(int (*)(struct pmac_therm *))adt746x_sensor_read;
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if (sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP) {
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/* Make up some ranges */
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sc->sc_sensors[i].therm.target_temp = 500 + ZERO_C_TO_K;
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sc->sc_sensors[i].therm.max_temp = 800 + ZERO_C_TO_K;
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pmac_thermal_sensor_register(&sc->sc_sensors[i].therm);
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}
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i++;
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}
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return (i);
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}
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static int
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adt746x_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)
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{
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device_t adt;
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struct adt746x_softc *sc;
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struct adt746x_fan *fan;
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int pwm = 0, error;
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adt = arg1;
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sc = device_get_softc(adt);
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fan = &sc->sc_fans[arg2];
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pwm = adt746x_fan_get_pwm(fan);
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error = sysctl_handle_int(oidp, &pwm, 0, req);
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if (error || !req->newptr)
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return (error);
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return (adt746x_fan_set_pwm(fan, pwm));
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}
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static void
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adt746x_attach_fans(device_t dev)
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{
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struct adt746x_softc *sc;
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struct sysctl_oid *oid, *fanroot_oid;
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struct sysctl_ctx_list *ctx;
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phandle_t child;
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char sysctl_name[32];
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int i, j;
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sc = device_get_softc(dev);
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sc->sc_nfans = 0;
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child = ofw_bus_get_node(dev);
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/* Count the actual number of fans. */
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sc->sc_nfans = adt746x_fill_fan_prop(dev);
|
|
|
|
device_printf(dev, "%d fans detected!\n", sc->sc_nfans);
|
|
|
|
if (sc->sc_nfans == 0) {
|
|
device_printf(dev, "WARNING: No fans detected!\n");
|
|
return;
|
|
}
|
|
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
fanroot_oid = SYSCTL_ADD_NODE(ctx,
|
|
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "fans",
|
|
CTLFLAG_RD, 0, "ADT Fan Information");
|
|
|
|
/* Now we can fill the properties into the allocated struct. */
|
|
sc->sc_nfans = adt746x_fill_fan_prop(dev);
|
|
|
|
/* Register fans with pmac_thermal */
|
|
for (i = 0; i < sc->sc_nfans; i++)
|
|
pmac_thermal_fan_register(&sc->sc_fans[i].fan);
|
|
|
|
/* Add sysctls for the fans. */
|
|
for (i = 0; i < sc->sc_nfans; i++) {
|
|
for (j = 0; j < strlen(sc->sc_fans[i].fan.name); j++) {
|
|
sysctl_name[j] = tolower(sc->sc_fans[i].fan.name[j]);
|
|
if (isspace(sysctl_name[j]))
|
|
sysctl_name[j] = '_';
|
|
}
|
|
sysctl_name[j] = 0;
|
|
|
|
sc->sc_fans[i].setpoint =
|
|
adt746x_fan_get_pwm(&sc->sc_fans[i]);
|
|
|
|
oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid),
|
|
OID_AUTO, sysctl_name, CTLFLAG_RD, 0, "Fan Information");
|
|
|
|
/* I use i to pass the fan id. */
|
|
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
|
|
"pwm", CTLTYPE_INT | CTLFLAG_RW, dev, i,
|
|
adt746x_fanrpm_sysctl, "I", "Fan PWM in %");
|
|
}
|
|
|
|
/* Dump fan location & type. */
|
|
if (bootverbose) {
|
|
for (i = 0; i < sc->sc_nfans; i++) {
|
|
device_printf(dev, "Fan location: %s",
|
|
sc->sc_fans[i].fan.name);
|
|
device_printf(dev, " id: %d RPM: %d\n",
|
|
sc->sc_fans[i].id,
|
|
sc->sc_fans[i].setpoint);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
adt746x_sensor_read(struct adt746x_sensor *sens)
|
|
{
|
|
struct adt746x_softc *sc;
|
|
uint16_t tmp = 0;
|
|
uint16_t val;
|
|
uint8_t temp, data[1], data1[1];
|
|
|
|
sc = device_get_softc(sens->dev);
|
|
if (sens->type != ADT746X_SENSOR_SPEED) {
|
|
if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg,
|
|
&temp) < 0)
|
|
return (-1);
|
|
if (sens->type == ADT746X_SENSOR_TEMP)
|
|
tmp = 10 * temp + ZERO_C_TO_K;
|
|
else
|
|
tmp = temp;
|
|
} else {
|
|
if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg,
|
|
data) < 0)
|
|
return (-1);
|
|
if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg + 1,
|
|
data1) < 0)
|
|
return (-1);
|
|
val = data[0] + (data1[0] << 8);
|
|
/* A value of 0xffff means the fan is stopped. */
|
|
if (val == 0 || val == 0xffff)
|
|
tmp = 0;
|
|
else
|
|
tmp = (90000 * 60) / val;
|
|
}
|
|
return (tmp);
|
|
}
|
|
|
|
static int
|
|
adt746x_sensor_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
device_t dev;
|
|
struct adt746x_softc *sc;
|
|
struct adt746x_sensor *sens;
|
|
int value, error;
|
|
|
|
dev = arg1;
|
|
sc = device_get_softc(dev);
|
|
sens = &sc->sc_sensors[arg2];
|
|
|
|
value = sens->therm.read(&sens->therm);
|
|
if (value < 0)
|
|
return (ENXIO);
|
|
|
|
error = sysctl_handle_int(oidp, &value, 0, req);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
adt746x_attach_sensors(device_t dev)
|
|
{
|
|
struct adt746x_softc *sc;
|
|
struct sysctl_oid *oid, *sensroot_oid;
|
|
struct sysctl_ctx_list *ctx;
|
|
phandle_t child;
|
|
char sysctl_name[40];
|
|
const char *unit;
|
|
const char *desc;
|
|
int i, j;
|
|
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->sc_nsensors = 0;
|
|
child = ofw_bus_get_node(dev);
|
|
|
|
/* Count the actual number of sensors. */
|
|
sc->sc_nsensors = adt746x_fill_sensor_prop(dev);
|
|
device_printf(dev, "%d sensors detected!\n", sc->sc_nsensors);
|
|
if (sc->sc_nsensors == 0) {
|
|
device_printf(dev, "WARNING: No sensors detected!\n");
|
|
return;
|
|
}
|
|
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
sensroot_oid = SYSCTL_ADD_NODE(ctx,
|
|
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensors",
|
|
CTLFLAG_RD, 0, "ADT Sensor Information");
|
|
|
|
/* Add the sysctl for the sensors. */
|
|
for (i = 0; i < sc->sc_nsensors; i++) {
|
|
for (j = 0; j < strlen(sc->sc_sensors[i].therm.name); j++) {
|
|
sysctl_name[j] = tolower(sc->sc_sensors[i].therm.name[j]);
|
|
if (isspace(sysctl_name[j]))
|
|
sysctl_name[j] = '_';
|
|
}
|
|
sysctl_name[j] = 0;
|
|
oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sensroot_oid),
|
|
OID_AUTO,
|
|
sysctl_name, CTLFLAG_RD, 0,
|
|
"Sensor Information");
|
|
if (sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP) {
|
|
unit = "temp";
|
|
desc = "sensor unit (C)";
|
|
} else if (sc->sc_sensors[i].type == ADT746X_SENSOR_VOLT) {
|
|
unit = "volt";
|
|
desc = "sensor unit (mV)";
|
|
} else {
|
|
unit = "rpm";
|
|
desc = "sensor unit (RPM)";
|
|
}
|
|
/* I use i to pass the sensor id. */
|
|
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
|
|
unit, CTLTYPE_INT | CTLFLAG_RD, dev, i,
|
|
adt746x_sensor_sysctl,
|
|
sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP ?
|
|
"IK" : "I", desc);
|
|
}
|
|
|
|
/* Dump sensor location & type. */
|
|
if (bootverbose) {
|
|
for (i = 0; i < sc->sc_nsensors; i++) {
|
|
device_printf(dev, "Sensor location: %s",
|
|
sc->sc_sensors[i].therm.name);
|
|
device_printf(dev, " type: %d id: %d reg: 0x%x\n",
|
|
sc->sc_sensors[i].type,
|
|
sc->sc_sensors[i].id,
|
|
sc->sc_sensors[i].reg);
|
|
}
|
|
}
|
|
}
|