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freebsd-skq/sys/powerpc/powermac/fcu.c
Hans Petter Selasky f0188618f2 Fix multiple incorrect SYSCTL arguments in the kernel: 
- Wrong integer type was specified.

- Wrong or missing "access" specifier. The "access" specifier
sometimes included the SYSCTL type, which it should not, except for
procedural SYSCTL nodes.

- Logical OR where binary OR was expected.

- Properly assert the "access" argument passed to all SYSCTL macros,
using the CTASSERT macro. This applies to both static- and dynamically
created SYSCTLs.

- Properly assert the the data type for both static and dynamic
SYSCTLs. In the case of static SYSCTLs we only assert that the data
pointed to by the SYSCTL data pointer has the correct size, hence
there is no easy way to assert types in the C language outside a
C-function.

- Rewrote some code which doesn't pass a constant "access" specifier
when creating dynamic SYSCTL nodes, which is now a requirement.

- Updated "EXAMPLES" section in SYSCTL manual page.

MFC after:	3 days
Sponsored by:	Mellanox Technologies
2014-10-21 07:31:21 +00:00

678 lines
17 KiB
C
Raw Blame History

/*-
* 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/reboot.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/limits.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>
/* FCU registers
* /u3@0,f8000000/i2c@f8001000/fan@15e
*/
#define FCU_RPM_FAIL 0x0b /* fans states in bits 0<1-6>7 */
#define FCU_RPM_AVAILABLE 0x0c
#define FCU_RPM_ACTIVE 0x0d
#define FCU_RPM_READ(x) 0x11 + (x) * 2
#define FCU_RPM_SET(x) 0x10 + (x) * 2
#define FCU_PWM_FAIL 0x2b
#define FCU_PWM_AVAILABLE 0x2c
#define FCU_PWM_ACTIVE 0x2d
#define FCU_PWM_RPM(x) 0x31 + (x) * 2 /* Get RPM. */
#define FCU_PWM_SGET(x) 0x30 + (x) * 2 /* Set or get PWM. */
struct fcu_fan {
struct pmac_fan fan;
device_t dev;
int id;
enum {
FCU_FAN_RPM,
FCU_FAN_PWM
} type;
int setpoint;
int rpm;
};
struct fcu_softc {
device_t sc_dev;
struct intr_config_hook enum_hook;
uint32_t sc_addr;
struct fcu_fan *sc_fans;
int sc_nfans;
};
/* We can read the PWM and the RPM from a PWM controlled fan.
* Offer both values via sysctl.
*/
enum {
FCU_PWM_SYSCTL_PWM = 1 << 8,
FCU_PWM_SYSCTL_RPM = 2 << 8
};
static int fcu_rpm_shift;
/* Regular bus attachment functions */
static int fcu_probe(device_t);
static int fcu_attach(device_t);
/* Utility functions */
static void fcu_attach_fans(device_t dev);
static int fcu_fill_fan_prop(device_t dev);
static int fcu_fan_set_rpm(struct fcu_fan *fan, int rpm);
static int fcu_fan_get_rpm(struct fcu_fan *fan);
static int fcu_fan_set_pwm(struct fcu_fan *fan, int pwm);
static int fcu_fan_get_pwm(device_t dev, struct fcu_fan *fan, int *pwm,
int *rpm);
static int fcu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS);
static void fcu_start(void *xdev);
static int fcu_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buf,
int len);
static int fcu_read_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data);
static device_method_t fcu_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fcu_probe),
DEVMETHOD(device_attach, fcu_attach),
{ 0, 0 },
};
static driver_t fcu_driver = {
"fcu",
fcu_methods,
sizeof(struct fcu_softc)
};
static devclass_t fcu_devclass;
DRIVER_MODULE(fcu, iicbus, fcu_driver, fcu_devclass, 0, 0);
static MALLOC_DEFINE(M_FCU, "fcu", "FCU Sensor Information");
static int
fcu_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff,
int len)
{
unsigned char buf[4];
int try = 0;
struct iic_msg msg[] = {
{ addr, IIC_M_WR, 0, buf }
};
msg[0].len = len + 1;
buf[0] = reg;
memcpy(buf + 1, buff, len);
for (;;)
{
if (iicbus_transfer(dev, msg, 1) == 0)
return (0);
if (++try > 5) {
device_printf(dev, "iicbus write failed\n");
return (-1);
}
pause("fcu_write", hz);
}
}
static int
fcu_read_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data)
{
uint8_t buf[4];
int err, try = 0;
struct iic_msg msg[2] = {
{ addr, IIC_M_WR | IIC_M_NOSTOP, 1, &reg },
{ addr, IIC_M_RD, 1, buf },
};
for (;;)
{
err = iicbus_transfer(dev, msg, 2);
if (err != 0)
goto retry;
*data = *((uint8_t*)buf);
return (0);
retry:
if (++try > 5) {
device_printf(dev, "iicbus read failed\n");
return (-1);
}
pause("fcu_read_1", hz);
}
}
static int
fcu_probe(device_t dev)
{
const char *name, *compatible;
struct fcu_softc *sc;
name = ofw_bus_get_name(dev);
compatible = ofw_bus_get_compat(dev);
if (!name)
return (ENXIO);
if (strcmp(name, "fan") != 0 || strcmp(compatible, "fcu") != 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
device_set_desc(dev, "Apple Fan Control Unit");
return (0);
}
static int
fcu_attach(device_t dev)
{
struct fcu_softc *sc;
sc = device_get_softc(dev);
sc->enum_hook.ich_func = fcu_start;
sc->enum_hook.ich_arg = dev;
/* We have to wait until interrupts are enabled. I2C read and write
* only works if the interrupts are available.
* The unin/i2c is controlled by the htpic on unin. But this is not
* the master. The openpic on mac-io is controlling the htpic.
* This one gets attached after the mac-io probing and then the
* interrupts will be available.
*/
if (config_intrhook_establish(&sc->enum_hook) != 0)
return (ENOMEM);
return (0);
}
static void
fcu_start(void *xdev)
{
unsigned char buf[1] = { 0xff };
struct fcu_softc *sc;
device_t dev = (device_t)xdev;
sc = device_get_softc(dev);
/* Start the fcu device. */
fcu_write(sc->sc_dev, sc->sc_addr, 0xe, buf, 1);
fcu_write(sc->sc_dev, sc->sc_addr, 0x2e, buf, 1);
fcu_read_1(sc->sc_dev, sc->sc_addr, 0, buf);
fcu_rpm_shift = (buf[0] == 1) ? 2 : 3;
device_printf(dev, "FCU initialized, RPM shift: %d\n",
fcu_rpm_shift);
/* Detect and attach child devices. */
fcu_attach_fans(dev);
config_intrhook_disestablish(&sc->enum_hook);
}
static int
fcu_fan_set_rpm(struct fcu_fan *fan, int rpm)
{
uint8_t reg;
struct fcu_softc *sc;
unsigned char buf[2];
sc = device_get_softc(fan->dev);
/* Clamp to allowed range */
rpm = max(fan->fan.min_rpm, rpm);
rpm = min(fan->fan.max_rpm, rpm);
if (fan->type == FCU_FAN_RPM) {
reg = FCU_RPM_SET(fan->id);
fan->setpoint = rpm;
} else {
device_printf(fan->dev, "Unknown fan type: %d\n", fan->type);
return (ENXIO);
}
buf[0] = rpm >> (8 - fcu_rpm_shift);
buf[1] = rpm << fcu_rpm_shift;
if (fcu_write(sc->sc_dev, sc->sc_addr, reg, buf, 2) < 0)
return (EIO);
return (0);
}
static int
fcu_fan_get_rpm(struct fcu_fan *fan)
{
uint8_t reg;
struct fcu_softc *sc;
uint8_t buff[2] = { 0, 0 };
uint8_t active = 0, avail = 0, fail = 0;
int rpm;
sc = device_get_softc(fan->dev);
if (fan->type == FCU_FAN_RPM) {
/* Check if the fan is available. */
reg = FCU_RPM_AVAILABLE;
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &avail) < 0)
return (-1);
if ((avail & (1 << fan->id)) == 0) {
device_printf(fan->dev,
"RPM Fan not available ID: %d\n", fan->id);
return (-1);
}
/* Check if we have a failed fan. */
reg = FCU_RPM_FAIL;
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &fail) < 0)
return (-1);
if ((fail & (1 << fan->id)) != 0) {
device_printf(fan->dev,
"RPM Fan failed ID: %d\n", fan->id);
return (-1);
}
/* Check if fan is active. */
reg = FCU_RPM_ACTIVE;
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &active) < 0)
return (-1);
if ((active & (1 << fan->id)) == 0) {
device_printf(fan->dev, "RPM Fan not active ID: %d\n",
fan->id);
return (-1);
}
reg = FCU_RPM_READ(fan->id);
} else {
device_printf(fan->dev, "Unknown fan type: %d\n", fan->type);
return (-1);
}
/* It seems that we can read the fans rpm. */
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, buff) < 0)
return (-1);
rpm = (buff[0] << (8 - fcu_rpm_shift)) | buff[1] >> fcu_rpm_shift;
return (rpm);
}
static int
fcu_fan_set_pwm(struct fcu_fan *fan, int pwm)
{
uint8_t reg;
struct fcu_softc *sc;
uint8_t buf[2];
sc = device_get_softc(fan->dev);
/* Clamp to allowed range */
pwm = max(fan->fan.min_rpm, pwm);
pwm = min(fan->fan.max_rpm, pwm);
if (fan->type == FCU_FAN_PWM) {
reg = FCU_PWM_SGET(fan->id);
if (pwm > 100)
pwm = 100;
if (pwm < 30)
pwm = 30;
fan->setpoint = pwm;
} else {
device_printf(fan->dev, "Unknown fan type: %d\n", fan->type);
return (EIO);
}
buf[0] = (pwm * 2550) / 1000;
if (fcu_write(sc->sc_dev, sc->sc_addr, reg, buf, 1) < 0)
return (EIO);
return (0);
}
static int
fcu_fan_get_pwm(device_t dev, struct fcu_fan *fan, int *pwm, int *rpm)
{
uint8_t reg;
struct fcu_softc *sc;
uint8_t buf[2];
uint8_t active = 0, avail = 0, fail = 0;
sc = device_get_softc(dev);
if (fan->type == FCU_FAN_PWM) {
/* Check if the fan is available. */
reg = FCU_PWM_AVAILABLE;
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &avail) < 0)
return (-1);
if ((avail & (1 << fan->id)) == 0) {
device_printf(dev, "PWM Fan not available ID: %d\n",
fan->id);
return (-1);
}
/* Check if we have a failed fan. */
reg = FCU_PWM_FAIL;
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &fail) < 0)
return (-1);
if ((fail & (1 << fan->id)) != 0) {
device_printf(dev, "PWM Fan failed ID: %d\n", fan->id);
return (-1);
}
/* Check if fan is active. */
reg = FCU_PWM_ACTIVE;
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, &active) < 0)
return (-1);
if ((active & (1 << fan->id)) == 0) {
device_printf(dev, "PWM Fan not active ID: %d\n",
fan->id);
return (-1);
}
reg = FCU_PWM_SGET(fan->id);
} else {
device_printf(dev, "Unknown fan type: %d\n", fan->type);
return (EIO);
}
/* It seems that we can read the fans pwm. */
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, buf) < 0)
return (-1);
*pwm = (buf[0] * 1000) / 2550;
/* Now read the rpm. */
reg = FCU_PWM_RPM(fan->id);
if (fcu_read_1(sc->sc_dev, sc->sc_addr, reg, buf) < 0)
return (-1);
*rpm = (buf[0] << (8 - fcu_rpm_shift)) | buf[1] >> fcu_rpm_shift;
return (0);
}
/*
* This function returns the number of fans. If we call it the second time
* and we have allocated memory for sc->sc_fans, we fill in the properties.
*/
static int
fcu_fill_fan_prop(device_t dev)
{
phandle_t child;
struct fcu_softc *sc;
u_int id[8];
char location[96];
char type[64];
int i = 0, j, len = 0, prop_len, prev_len = 0;
sc = device_get_softc(dev);
child = ofw_bus_get_node(dev);
/* Fill the fan location property. */
prop_len = OF_getprop(child, "hwctrl-location", location,
sizeof(location));
while (len < prop_len) {
if (sc->sc_fans != NULL) {
strcpy(sc->sc_fans[i].fan.name, location + len);
}
prev_len = strlen(location + len) + 1;
len += prev_len;
i++;
}
if (sc->sc_fans == NULL)
return (i);
/* Fill the fan type property. */
len = 0;
i = 0;
prev_len = 0;
prop_len = OF_getprop(child, "hwctrl-type", type, sizeof(type));
while (len < prop_len) {
if (strcmp(type + len, "fan-rpm") == 0)
sc->sc_fans[i].type = FCU_FAN_RPM;
else
sc->sc_fans[i].type = FCU_FAN_PWM;
prev_len = strlen(type + len) + 1;
len += prev_len;
i++;
}
/* Fill the fan ID property. */
prop_len = OF_getprop(child, "hwctrl-id", id, sizeof(id));
for (j = 0; j < i; j++)
sc->sc_fans[j].id = ((id[j] >> 8) & 0x0f) % 8;
/* Fill the fan zone property. */
prop_len = OF_getprop(child, "hwctrl-zone", id, sizeof(id));
for (j = 0; j < i; j++)
sc->sc_fans[j].fan.zone = id[j];
/* Finish setting up fan properties */
for (j = 0; j < i; j++) {
sc->sc_fans[j].dev = sc->sc_dev;
if (sc->sc_fans[j].type == FCU_FAN_RPM) {
sc->sc_fans[j].fan.min_rpm = 4800 >> fcu_rpm_shift;
sc->sc_fans[j].fan.max_rpm = 56000 >> fcu_rpm_shift;
sc->sc_fans[j].setpoint =
fcu_fan_get_rpm(&sc->sc_fans[j]);
sc->sc_fans[j].fan.read =
(int (*)(struct pmac_fan *))(fcu_fan_get_rpm);
sc->sc_fans[j].fan.set =
(int (*)(struct pmac_fan *, int))(fcu_fan_set_rpm);
} else {
sc->sc_fans[j].fan.min_rpm = 30; /* Percent */
sc->sc_fans[j].fan.max_rpm = 100;
sc->sc_fans[j].fan.read = NULL;
sc->sc_fans[j].fan.set =
(int (*)(struct pmac_fan *, int))(fcu_fan_set_pwm);
}
sc->sc_fans[j].fan.default_rpm = sc->sc_fans[j].fan.max_rpm;
}
return (i);
}
static int
fcu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t fcu;
struct fcu_softc *sc;
struct fcu_fan *fan;
int rpm = 0, pwm = 0, error = 0;
fcu = arg1;
sc = device_get_softc(fcu);
fan = &sc->sc_fans[arg2 & 0x00ff];
if (fan->type == FCU_FAN_RPM) {
rpm = fcu_fan_get_rpm(fan);
if (rpm < 0)
return (EIO);
error = sysctl_handle_int(oidp, &rpm, 0, req);
} else {
error = fcu_fan_get_pwm(fcu, fan, &pwm, &rpm);
if (error < 0)
return (EIO);
switch (arg2 & 0xff00) {
case FCU_PWM_SYSCTL_PWM:
error = sysctl_handle_int(oidp, &pwm, 0, req);
break;
case FCU_PWM_SYSCTL_RPM:
error = sysctl_handle_int(oidp, &rpm, 0, req);
break;
default:
/* This should never happen */
return (EINVAL);
};
}
/* We can only read the RPM from a PWM controlled fan, so return. */
if ((arg2 & 0xff00) == FCU_PWM_SYSCTL_RPM)
return (0);
if (error || !req->newptr)
return (error);
if (fan->type == FCU_FAN_RPM)
return (fcu_fan_set_rpm(fan, rpm));
else
return (fcu_fan_set_pwm(fan, pwm));
}
static void
fcu_attach_fans(device_t dev)
{
struct fcu_softc *sc;
struct sysctl_oid *oid, *fanroot_oid;
struct sysctl_ctx_list *ctx;
char sysctl_name[32];
int i, j;
sc = device_get_softc(dev);
sc->sc_nfans = 0;
/* Count the actual number of fans. */
sc->sc_nfans = fcu_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;
}
sc->sc_fans = malloc(sc->sc_nfans * sizeof(struct fcu_fan), M_FCU,
M_WAITOK | M_ZERO);
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, "FCU Fan Information");
/* Now we can fill the properties into the allocated struct. */
sc->sc_nfans = fcu_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;
if (sc->sc_fans[i].type == FCU_FAN_RPM) {
oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid),
OID_AUTO, sysctl_name,
CTLFLAG_RD, 0, "Fan Information");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"minrpm", CTLFLAG_RD,
&(sc->sc_fans[i].fan.min_rpm), 0,
"Minimum allowed RPM");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"maxrpm", CTLFLAG_RD,
&(sc->sc_fans[i].fan.max_rpm), 0,
"Maximum allowed RPM");
/* I use i to pass the fan id. */
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"rpm", CTLTYPE_INT | CTLFLAG_RW, dev, i,
fcu_fanrpm_sysctl, "I", "Fan RPM");
} else {
fcu_fan_get_pwm(dev, &sc->sc_fans[i],
&sc->sc_fans[i].setpoint,
&sc->sc_fans[i].rpm);
oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid),
OID_AUTO, sysctl_name,
CTLFLAG_RD, 0, "Fan Information");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"minpwm", CTLFLAG_RD,
&(sc->sc_fans[i].fan.min_rpm), 0,
"Minimum allowed PWM in %");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"maxpwm", CTLFLAG_RD,
&(sc->sc_fans[i].fan.max_rpm), 0,
"Maximum allowed PWM in %");
/* I use i to pass the fan id or'ed with the type
* of info I want to display/modify.
*/
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"pwm", CTLTYPE_INT | CTLFLAG_RW, dev,
FCU_PWM_SYSCTL_PWM | i,
fcu_fanrpm_sysctl, "I", "Fan PWM in %");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"rpm", CTLTYPE_INT | CTLFLAG_RD, dev,
FCU_PWM_SYSCTL_RPM | i,
fcu_fanrpm_sysctl, "I", "Fan RPM");
}
}
/* Dump fan location, type & RPM. */
if (bootverbose) {
device_printf(dev, "Fans\n");
for (i = 0; i < sc->sc_nfans; i++) {
device_printf(dev, "Location: %s type: %d ID: %d "
"RPM: %d\n", sc->sc_fans[i].fan.name,
sc->sc_fans[i].type, sc->sc_fans[i].id,
(sc->sc_fans[i].type == FCU_FAN_RPM) ?
sc->sc_fans[i].setpoint :
sc->sc_fans[i].rpm );
}
}
}
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