Add new fan controller driver for the G4 MDD PowerMac. Submitted and tested
by Justin Hibbits. Approved by: nwhitehorn (mentor)
This commit is contained in:
Andreas Tobler
parent
47a5ab295a
commit
03c6aeca84
@ -162,6 +162,7 @@ powerpc/powermac/smusat.c optional powermac smu
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powerpc/powermac/uninorth.c optional powermac
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powerpc/powermac/uninorthpci.c optional powermac pci
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powerpc/powermac/vcoregpio.c optional powermac
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powerpc/powermac/windtunnel.c optional powermac windtunnel
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powerpc/powerpc/altivec.c optional aim
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powerpc/powerpc/atomic.S standard
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powerpc/powerpc/autoconf.c standard
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@ -180,6 +180,7 @@ device fcu # Apple Fan Control Unit
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device max6690 # PowerMac7,2 temperature sensor
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device powermac_nvram # Open Firmware configuration NVRAM
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device smu # Apple System Management Unit
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device windtunnel # Apple G4 MDD fan controller
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# ADB support
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device adb
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@ -47,6 +47,7 @@ device pmu # Apple Power Management Unit
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device smu # Apple System Management Unit
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device snd_ai2s # Apple I2S Audio
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device snd_davbus # Apple Davbus Audio
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device windtunnel # Apple G4 MDD fan controller
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#####################################################################
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216
sys/powerpc/powermac/windtunnel.c
Normal file
216
sys/powerpc/powermac/windtunnel.c
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@ -0,0 +1,216 @@
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/*-
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* Copyright (c) 2011 Justin Hibbits
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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/kthread.h>
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#include <sys/limits.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/unistd.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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struct adm1030_softc {
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struct pmac_fan fan;
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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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phandle_t sc_thermostat_phandle;
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device_t sc_thermostat_dev;
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};
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/* Regular bus attachment functions */
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static int adm1030_probe(device_t);
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static int adm1030_attach(device_t);
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/* Utility functions */
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static void adm1030_start(void *xdev);
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static int adm1030_write_byte(device_t dev, uint32_t addr, uint8_t reg, uint8_t buf);
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static int adm1030_set(struct adm1030_softc *fan, int pwm);
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static device_method_t adm1030_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, adm1030_probe),
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DEVMETHOD(device_attach, adm1030_attach),
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{0, 0},
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};
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static driver_t adm1030_driver = {
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"adm1030",
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adm1030_methods,
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sizeof(struct adm1030_softc)
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};
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static devclass_t adm1030_devclass;
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DRIVER_MODULE(adm1030, iicbus, adm1030_driver, adm1030_devclass, 0, 0);
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static int
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adm1030_write_byte(device_t dev, uint32_t addr, uint8_t reg, uint8_t byte)
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{
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unsigned char 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, 0, buf}
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};
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msg[0].len = 2;
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buf[0] = reg;
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buf[1] = byte;
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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("adm1030_write_byte", hz);
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}
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}
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static int
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adm1030_probe(device_t dev)
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{
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const char *name, *compatible;
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struct adm1030_softc *sc;
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phandle_t handle;
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phandle_t thermostat;
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name = ofw_bus_get_name(dev);
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compatible = ofw_bus_get_compat(dev);
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handle = ofw_bus_get_node(dev);
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if (!name)
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return (ENXIO);
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if (strcmp(name, "fan") != 0 || strcmp(compatible, "adm1030") != 0)
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return (ENXIO);
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/* This driver can only be used if there's an associated temp sensor. */
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if (OF_getprop(handle, "platform-getTemp", &thermostat, sizeof(thermostat)) < 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, "G4 MDD Fan driver");
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return (0);
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}
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static int
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adm1030_attach(device_t dev)
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{
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struct adm1030_softc *sc;
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sc = device_get_softc(dev);
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sc->enum_hook.ich_func = adm1030_start;
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sc->enum_hook.ich_arg = dev;
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/*
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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. The unin/i2c is
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* controlled by the htpic on unin. But this is not the master. The
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* openpic on mac-io is controlling the htpic. This one gets attached
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* after the mac-io probing and then the interrupts will be
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* 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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adm1030_start(void *xdev)
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{
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struct adm1030_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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/* Start the adm1030 device. */
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adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x1, 0x1);
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adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x0, 0x95);
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adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x23, 0x91);
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/* Use the RPM fields as PWM duty cycles. */
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sc->fan.min_rpm = 0;
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sc->fan.max_rpm = 15;
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sc->fan.default_rpm = 2;
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strcpy(sc->fan.name, "MDD Case fan");
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sc->fan.zone = 0;
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sc->fan.read = NULL;
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sc->fan.set = (int (*)(struct pmac_fan *, int))adm1030_set;
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config_intrhook_disestablish(&sc->enum_hook);
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pmac_thermal_fan_register(&sc->fan);
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}
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static int adm1030_set(struct adm1030_softc *fan, int pwm)
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{
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/* Clamp the PWM to 0-0xF, one nibble. */
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if (pwm > 0xF)
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pwm = 0xF;
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if (pwm < 0)
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pwm = 0;
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if (adm1030_write_byte(fan->sc_dev, fan->sc_addr, 0x22, pwm) < 0)
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return (-1);
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return (0);
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}
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