freebsd-dev/sys/dev/iicbus/adm1030.c
Justin Hibbits e9152038d3 Move the adm1030 driver to the proper location, and rename it.
For compatibility, 'device windtunnel' is still supported, but one should use
'device adm1030' instead, and this has been updated in GENERIC and NOTES.
2014-10-16 01:32:22 +00:00

241 lines
5.8 KiB
C

/*-
* Copyright (c) 2011 Justin Hibbits
* Copyright (c) 2010 Andreas Tobler
* 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 ``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 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/callout.h>
#include <sys/conf.h>
#include <sys/cpu.h>
#include <sys/ctype.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/limits.h>
#include <sys/reboot.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <dev/iicbus/iicbus.h>
#include <dev/iicbus/iiconf.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <powerpc/powermac/powermac_thermal.h>
struct adm1030_softc {
struct pmac_fan fan;
device_t sc_dev;
struct intr_config_hook enum_hook;
uint32_t sc_addr;
int sc_pwm;
};
/* Regular bus attachment functions */
static int adm1030_probe(device_t);
static int adm1030_attach(device_t);
/* Utility functions */
static void adm1030_start(void *xdev);
static int adm1030_write_byte(device_t dev, uint32_t addr, uint8_t reg, uint8_t buf);
static int adm1030_set(struct adm1030_softc *fan, int pwm);
static int adm1030_sysctl(SYSCTL_HANDLER_ARGS);
static device_method_t adm1030_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, adm1030_probe),
DEVMETHOD(device_attach, adm1030_attach),
{0, 0},
};
static driver_t adm1030_driver = {
"adm1030",
adm1030_methods,
sizeof(struct adm1030_softc)
};
static devclass_t adm1030_devclass;
DRIVER_MODULE(adm1030, iicbus, adm1030_driver, adm1030_devclass, 0, 0);
static int
adm1030_write_byte(device_t dev, uint32_t addr, uint8_t reg, uint8_t byte)
{
unsigned char buf[4];
int try = 0;
struct iic_msg msg[] = {
{addr, IIC_M_WR, 0, buf}
};
msg[0].len = 2;
buf[0] = reg;
buf[1] = byte;
for (;;)
{
if (iicbus_transfer(dev, msg, 1) == 0)
return (0);
if (++try > 5) {
device_printf(dev, "iicbus write failed\n");
return (-1);
}
pause("adm1030_write_byte", hz);
}
}
static int
adm1030_probe(device_t dev)
{
const char *name, *compatible;
struct adm1030_softc *sc;
phandle_t handle;
phandle_t thermostat;
name = ofw_bus_get_name(dev);
compatible = ofw_bus_get_compat(dev);
handle = ofw_bus_get_node(dev);
if (!name)
return (ENXIO);
if (strcmp(name, "fan") != 0 || strcmp(compatible, "adm1030") != 0)
return (ENXIO);
/* This driver can only be used if there's an associated temp sensor. */
if (OF_getprop(handle, "platform-getTemp", &thermostat, sizeof(thermostat)) < 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
device_set_desc(dev, "G4 MDD Fan driver");
return (0);
}
static int
adm1030_attach(device_t dev)
{
struct adm1030_softc *sc;
struct sysctl_ctx_list *ctx;
struct sysctl_oid *tree;
sc = device_get_softc(dev);
sc->enum_hook.ich_func = adm1030_start;
sc->enum_hook.ich_arg = dev;
/*
* Wait until interrupts are available, which won't be until the openpic is
* intialized.
*/
if (config_intrhook_establish(&sc->enum_hook) != 0)
return (ENOMEM);
ctx = device_get_sysctl_ctx(dev);
tree = device_get_sysctl_tree(dev);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "pwm",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, dev,
0, adm1030_sysctl, "I", "Fan PWM Rate");
return (0);
}
static void
adm1030_start(void *xdev)
{
struct adm1030_softc *sc;
device_t dev = (device_t) xdev;
sc = device_get_softc(dev);
/* Start the adm1030 device. */
adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x1, 0x1);
adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x0, 0x95);
adm1030_write_byte(sc->sc_dev, sc->sc_addr, 0x23, 0x91);
/* Use the RPM fields as PWM duty cycles. */
sc->fan.min_rpm = 0;
sc->fan.max_rpm = 0x0F;
sc->fan.default_rpm = 2;
strcpy(sc->fan.name, "MDD Case fan");
sc->fan.zone = 0;
sc->fan.read = NULL;
sc->fan.set = (int (*)(struct pmac_fan *, int))adm1030_set;
config_intrhook_disestablish(&sc->enum_hook);
pmac_thermal_fan_register(&sc->fan);
}
static int adm1030_set(struct adm1030_softc *fan, int pwm)
{
/* Clamp the PWM to 0-0xF, one nibble. */
if (pwm > 0xF)
pwm = 0xF;
if (pwm < 0)
pwm = 0;
if (adm1030_write_byte(fan->sc_dev, fan->sc_addr, 0x22, pwm) < 0)
return (-1);
fan->sc_pwm = pwm;
return (0);
}
static int
adm1030_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t adm1030;
struct adm1030_softc *sc;
int pwm, error;
adm1030 = arg1;
sc = device_get_softc(adm1030);
pwm = sc->sc_pwm;
error = sysctl_handle_int(oidp, &pwm, 0, req);
if (error || !req->newptr)
return (error);
return (adm1030_set(sc, pwm));
}