[RFC/T] fan control unit driver for PowerMac 7.2
Andreas Tobler
andreast-list at fgznet.ch
Sat Jul 17 14:30:26 UTC 2010
On 17.07.10 16:22, Andreas Tobler wrote:
> Hi Peter, others
>
> Over the past few moons I've written a fcu driver (with Nathans help)
> which should allow to control the fans in the older PowerMac7.2.
>
> I'll post it here to get some feedback from you and others.
>
> To make it work you need to place it in sys/powerpc/powermac
> In the sys/conf/files.powerpc(64) you need to add this:
>
> powerpc/powermac/fcu.c optional powermac
>
> I developed the driver on the powermac64 branch. But I expect it to work
> also on 32-bit. But...
>
> I have one issue which is not solved yet. To make it read the i2c
> devices I had to increase the DELAY in kiic_writereg to 100. This might
> be specific to my G5, a dual 1.8GHz machine.
>
> Currently it is one big file with several sub components.
>
> I'd welcome some feedback.
I wonder if this works better.
-------------- next part --------------
/*-
* 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: head/sys/powerpc/powermac/fcu.c xxxx 2010-07-15 $");
#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>
/* FCU registers
* /u3 at 0,f8000000/i2c at f8001000/fan at 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_READ(x) 0x31 + (x) * 2
#define FCU_PWM_SET(x) 0x30 + (x) * 2
struct fcu_fan {
int id;
cell_t min_rpm;
cell_t max_rpm;
char location[32];
enum {
FCU_FAN_RPM,
FCU_FAN_PWM
} type;
int setpoint;
};
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;
};
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(device_t dev, struct fcu_fan *fan, int rpm);
static int fcu_fan_get_rpm(device_t dev, struct fcu_fan *fan, int *rpm);
static void fcu_start(void *xdev);
/* Generic i2c read/write functions. */
static int write_i2c(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buf,
int len);
static int read_i2c_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data);
static int read_i2c_2(device_t dev, uint32_t addr, uint8_t reg, uint16_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);
MALLOC_DEFINE(M_FCU, "fcu", "FCU Sensor Information");
/* Generic i2c read/write functions. */
static int
write_i2c(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff,
int len)
{
unsigned char buf[4];
struct iic_msg msg[] = {
{addr, IIC_M_WR, 0, buf }
};
msg[0].len = len + 1;
buf[0] = reg;
memcpy(buf + 1, buff, len);
if (iicbus_transfer(dev, msg, 1) != 0) {
device_printf(dev, "iicbus write failed\n");
return (EIO);
}
return (0);
}
static int
read_i2c_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data)
{
uint8_t buf[4];
struct iic_msg msg[2] = {
{addr, IIC_M_WR | IIC_M_NOSTOP, 1, ®},
{addr, IIC_M_RD, 1, buf},
};
if (iicbus_transfer(dev, msg, 2) != 0) {
device_printf(dev, "iicbus read failed\n");
return (EIO);
}
*data = *((uint8_t*)buf);
return (0);
}
static int
read_i2c_2(device_t dev, uint32_t addr, uint8_t reg, uint16_t *data)
{
uint8_t buf[4];
struct iic_msg msg[2] = {
{addr, IIC_M_WR | IIC_M_NOSTOP, 1, ®},
{addr, IIC_M_RD, 2, buf},
};
if (iicbus_transfer(dev, msg, 2) != 0) {
device_printf(dev, "iicbus read failed\n");
return (EIO);
}
*data = *((uint16_t*)buf);
return (0);
}
/* FCU starts here. */
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. */
write_i2c(sc->sc_dev, sc->sc_addr, 0xe, buf, 1);
write_i2c(sc->sc_dev, sc->sc_addr, 0x2e, buf, 1);
read_i2c_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);
}
/*
* Sensor and fan management
*/
static int
fcu_fan_set_rpm(device_t dev, struct fcu_fan *fan, int rpm)
{
uint8_t reg;
struct fcu_softc *sc;
unsigned char buf[2];
sc = device_get_softc(dev);
/* Clamp to allowed range */
rpm = max(fan->min_rpm, rpm);
rpm = min(fan->max_rpm, rpm);
if (fan->type == FCU_FAN_RPM) {
reg = FCU_RPM_SET(fan->id);
fan->setpoint = rpm;
} else if (fan->type == FCU_FAN_PWM) {
reg = FCU_PWM_SET(fan->id);
if (rpm > 3500)
rpm = 3500;
if (rpm < 500)
rpm = 500;
fan->setpoint = rpm;
/* PWM 30: 550 rpm, PWM 255: 3400 rpm. */
rpm = (rpm * 255) / 3500;
} else {
device_printf(dev, "Unknown fan type: %d\n", fan->type);
return (EIO);
}
if (fan->type == FCU_FAN_RPM) {
buf[0] = rpm >> (8 - fcu_rpm_shift);
buf[1] = rpm << fcu_rpm_shift;
write_i2c(sc->sc_dev, sc->sc_addr, reg, buf, 2);
} else {
buf[0] = rpm;
write_i2c(sc->sc_dev, sc->sc_addr, reg, buf, 1);
}
return (0);
}
static int
fcu_fan_get_rpm(device_t dev, struct fcu_fan *fan, int *rpm)
{
uint8_t reg;
struct fcu_softc *sc;
uint8_t buff[2] = { 0, 0 };
uint8_t active = 0, avail = 0, fail = 0;
sc = device_get_softc(dev);
if (fan->type == FCU_FAN_RPM) {
/* Check if the fan is available. */
reg = FCU_RPM_AVAILABLE;
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, &avail);
if ((avail & (1 << fan->id)) == 0) {
device_printf(dev, "RPM Fan not available ID: %d\n",
fan->id);
return (EIO);
}
/* Check if we have a failed fan. */
reg = FCU_RPM_FAIL;
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, &fail);
if ((fail & (1 << fan->id)) != 0) {
device_printf(dev, "RPM Fan failed ID: %d\n", fan->id);
return (EIO);
}
/* Check if fan is active. */
reg = FCU_RPM_ACTIVE;
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, &active);
if ((active & (1 << fan->id)) == 0) {
device_printf(dev, "RPM Fan not active ID: %d\n",
fan->id);
return (ENXIO);
}
reg = FCU_RPM_READ(fan->id);
} else if (fan->type == FCU_FAN_PWM) {
/* Check if the fan is available. */
reg = FCU_PWM_AVAILABLE;
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, &avail);
if ((avail & (1 << fan->id)) == 0) {
device_printf(dev, "PWM Fan not available ID: %d\n",
fan->id);
return (EIO);
}
/* Check if we have a failed fan. */
reg = FCU_PWM_FAIL;
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, &fail);
if ((fail & (1 << fan->id)) != 0) {
device_printf(dev, "PWM Fan failed ID: %d\n", fan->id);
return (EIO);
}
/* Check if fan is active. */
reg = FCU_PWM_ACTIVE;
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, &active);
if ((active & (1 << fan->id)) == 0) {
device_printf(dev, "PWM Fan not active ID: %d\n",
fan->id);
return (ENXIO);
}
reg = FCU_PWM_READ(fan->id);
} else {
device_printf(dev, "Unknown fan type: %d\n", fan->type);
return (EIO);
}
/* It seems that we can read the fans rpm. */
read_i2c_1(sc->sc_dev, sc->sc_addr, reg, buff);
*rpm = (buff[0] << (8 - fcu_rpm_shift)) | buff[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;
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_getproplen(child, "hwctrl-location");
char location[prop_len];
OF_getprop(child, "hwctrl-location", location, sizeof(location));
while (len < prop_len) {
if (sc->sc_fans != NULL) {
strcpy(sc->sc_fans[i].location, 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_getproplen(child, "hwctrl-type");
char type[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_getproplen(child, "hwctrl-id");
u_int id[prop_len / 4];
OF_getprop(child, "hwctrl-id", id, sizeof(id));
for (j = 0; j < i; j++)
sc->sc_fans[j].id = ((id[j] >> 8) & 0x0f) % 8;
return (i);
}
static int
fcu_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t fcu;
struct fcu_softc *sc;
struct fcu_fan *fan;
int rpm = 0, error;
fcu = arg1;
sc = device_get_softc(fcu);
fan = &sc->sc_fans[arg2];
fcu_fan_get_rpm(fcu, fan, &rpm);
error = sysctl_handle_int(oidp, &rpm, 0, req);
if (error || !req->newptr)
return (error);
return (fcu_fan_set_rpm(fcu, fan, rpm));
}
static void
fcu_attach_fans(device_t dev)
{
struct fcu_softc *sc;
struct sysctl_oid *oid, *fanroot_oid;
struct sysctl_ctx_list *ctx;
phandle_t child;
char sysctl_name[32];
int i, j;
sc = device_get_softc(dev);
sc->sc_nfans = 0;
child = ofw_bus_get_node(dev);
/* 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);
/* Add sysctls for the fans. */
for (i = 0; i < sc->sc_nfans; i++) {
for (j = 0; j < strlen(sc->sc_fans[i].location); j++) {
sysctl_name[j] = tolower(sc->sc_fans[i].location[j]);
if (isspace(sysctl_name[j]))
sysctl_name[j] = '_';
}
sysctl_name[j] = 0;
sc->sc_fans[i].min_rpm = 2400 >> fcu_rpm_shift;
sc->sc_fans[i].max_rpm = 56000 >> fcu_rpm_shift;
fcu_fan_get_rpm(dev, &sc->sc_fans[i], &sc->sc_fans[i].setpoint);
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",
CTLTYPE_INT | CTLFLAG_RD,
&(sc->sc_fans[i].min_rpm), sizeof(cell_t),
"Minimum allowed RPM");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "maxrpm",
CTLTYPE_INT | CTLFLAG_RD,
&(sc->sc_fans[i].max_rpm), sizeof(cell_t),
"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");
}
/* 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].location,
sc->sc_fans[i].type, sc->sc_fans[i].id,
sc->sc_fans[i].setpoint);
}
}
}
/* Temperature sensors stuff. */
#define FCU_ZERO_C_TO_K 2732
/* Drivebay sensor: LM75/DS1775. */
#define DS1775_TEMP 0x0
struct ds1775_sensor {
char location[32];
};
static int ds1775_probe(device_t);
static int ds1775_attach(device_t);
static int ds1775_sensor_sysctl(SYSCTL_HANDLER_ARGS);
static void ds1775_start(void *xdev);
struct ds1775_softc {
device_t sc_dev;
struct intr_config_hook enum_hook;
uint32_t sc_addr;
struct ds1775_sensor *sc_sensors;
};
static device_method_t ds1775_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ds1775_probe),
DEVMETHOD(device_attach, ds1775_attach),
{ 0, 0 },
};
static driver_t ds1775_driver = {
"tm",
ds1775_methods,
sizeof(struct ds1775_softc)
};
static devclass_t ds1775_devclass;
DRIVER_MODULE(tm, iicbus, ds1775_driver, ds1775_devclass, 0, 0);
MALLOC_DEFINE(M_TM, "tm", "Temp-Monitor DS1775");
static int
ds1775_probe(device_t dev)
{
const char *name, *compatible;
struct ds1775_softc *sc;
name = ofw_bus_get_name(dev);
compatible = ofw_bus_get_compat(dev);
if (!name)
return (ENXIO);
if (strcmp(name, "temp-monitor") != 0
|| strcmp(compatible, "ds1775") != 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
device_set_desc(dev, "Temp-Monitor DS1755");
return (0);
}
static int
ds1775_attach(device_t dev)
{
struct ds1775_softc *sc;
sc = device_get_softc(dev);
sc->enum_hook.ich_func = ds1775_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
ds1775_start(void *xdev)
{
phandle_t child;
struct ds1775_softc *sc;
struct ds1775_sensor *sens;
struct sysctl_oid *sensroot_oid;
struct sysctl_ctx_list *ctx;
int i;
device_t dev = (device_t)xdev;
sc = device_get_softc(dev);
child = ofw_bus_get_node(dev);
sc->sc_sensors = malloc (sizeof(struct ds1775_sensor),
M_TM, M_WAITOK | M_ZERO);
sens = sc->sc_sensors;
ctx = device_get_sysctl_ctx(dev);
sensroot_oid = device_get_sysctl_tree(dev);
char sysctl_name[40], sysctl_desc[40];
const char *units;
OF_getprop(child, "hwsensor-location", sens->location,
sizeof(sens->location));
units = "C";
for (i = 0; i < strlen(sens->location); i++) {
sysctl_name[i] = tolower(sens->location[i]);
if (isspace(sysctl_name[i]))
sysctl_name[i] = '_';
}
sysctl_name[i] = 0;
sprintf(sysctl_desc,"%s (%s)", sens->location, units);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensroot_oid), OID_AUTO,
sysctl_name,
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev,
0, ds1775_sensor_sysctl, "IK", sysctl_desc);
config_intrhook_disestablish(&sc->enum_hook);
}
static int
ds1775_sensor_read(device_t dev, struct ds1775_sensor *sens, int *temp)
{
struct ds1775_softc *sc;
uint16_t buf[2];
uint16_t read;
sc = device_get_softc(dev);
read_i2c_2(sc->sc_dev, sc->sc_addr, DS1775_TEMP, buf);
read = *((int16_t *)buf);
/* The default mode of the ADC is 9 bit, the resolution is 0.5 C per
bit.
The temperature is in tenth kelvin.
*/
*temp = ((int16_t)(read) >> 7) * 5;
return (0);
}
static int
ds1775_sensor_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev;
struct ds1775_softc *sc;
struct ds1775_sensor *sens;
int value;
int error;
unsigned int temp;
dev = arg1;
sc = device_get_softc(dev);
sens = &sc->sc_sensors[arg2];
error = ds1775_sensor_read(dev, sens, &value);
if (error != 0)
return (error);
temp = value + FCU_ZERO_C_TO_K;
error = sysctl_handle_int(oidp, &temp, 0, req);
return (error);
}
/* Inlet, Backside, U3 Heatsink sensor: MAX6690. */
#define MAX6690_INT_TEMP 0x0
#define MAX6690_EXT_TEMP 0x1
#define MAX6690_EEXT_TEMP 0x10
#define MAX6690_IEXT_TEMP 0x11
#define MAX6690_TEMP_MASK 0xe0
struct max6690_sensor {
int id;
char location[32];
};
static int max6690_probe(device_t);
static int max6690_attach(device_t);
static int max6690_sensor_sysctl(SYSCTL_HANDLER_ARGS);
static void max6690_start(void *xdev);
struct max6690_softc {
device_t sc_dev;
struct intr_config_hook enum_hook;
uint32_t sc_addr;
struct max6690_sensor *sc_sensors;
int sc_nsensors;
};
static device_method_t max6690_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, max6690_probe),
DEVMETHOD(device_attach, max6690_attach),
{ 0, 0 },
};
static driver_t max6690_driver = {
"tm1",
max6690_methods,
sizeof(struct max6690_softc)
};
static devclass_t max6690_devclass;
DRIVER_MODULE(tm1, iicbus, max6690_driver, max6690_devclass, 0, 0);
MALLOC_DEFINE(M_TM1, "tm1", "Temp-Monitor MAX6690");
static int
max6690_probe(device_t dev)
{
const char *name, *compatible;
struct max6690_softc *sc;
name = ofw_bus_get_name(dev);
compatible = ofw_bus_get_compat(dev);
if (!name)
return (ENXIO);
if (strcmp(name, "temp-monitor") != 0
|| strcmp(compatible, "max6690") != 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
device_set_desc(dev, "Temp-Monitor MAX6690");
return (0);
}
/*
* This function returns the number of sensors. If we call it the second time
* and we have allocated memory for sc->sc_sensors, we fill in the properties.
*/
static int
max6690_fill_sensor_prop(device_t dev)
{
phandle_t child;
struct max6690_softc *sc;
int i = 0, j, len = 0, prop_len, prev_len = 0;
sc = device_get_softc(dev);
child = ofw_bus_get_node(dev);
/* Fill the sensor location property. */
prop_len = OF_getproplen(child, "hwsensor-location");
char location[prop_len];
OF_getprop(child, "hwsensor-location", location, sizeof(location));
while (len < prop_len) {
if (sc->sc_sensors != NULL)
strcpy(sc->sc_sensors[i].location, location + len);
prev_len = strlen(location + len) + 1;
len += prev_len;
i++;
}
if (sc->sc_sensors == NULL)
return (i);
/* Fill the sensor id property. */
prop_len = OF_getproplen(child, "hwsensor-id");
u_int id[prop_len / 4];
OF_getprop(child, "hwsensor-id", id, sizeof(id));
for (j = 0; j < i; j++)
sc->sc_sensors[j].id = (id[j] & 0xf);
return (i);
}
static int
max6690_attach(device_t dev)
{
struct max6690_softc *sc;
sc = device_get_softc(dev);
sc->enum_hook.ich_func = max6690_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
max6690_start(void *xdev)
{
phandle_t child;
struct max6690_softc *sc;
struct sysctl_oid *oid, *sensroot_oid;
struct sysctl_ctx_list *ctx;
char sysctl_name[32];
int i, j;
device_t dev = (device_t)xdev;
sc = device_get_softc(dev);
sc->sc_nsensors = 0;
child = ofw_bus_get_node(dev);
/* Count the actual number of sensors. */
sc->sc_nsensors = max6690_fill_sensor_prop(dev);
device_printf(dev, "MAX6690 # sensors: %d\n", sc->sc_nsensors);
if (sc->sc_nsensors == 0)
device_printf(dev, "WARNING: No MAX6690 sensors detected!\n");
sc->sc_sensors = malloc (sc->sc_nsensors * sizeof(struct max6690_sensor),
M_TM1, M_WAITOK | M_ZERO);
ctx = device_get_sysctl_ctx(dev);
/* XXXX better name for sensor root? */
sensroot_oid = SYSCTL_ADD_NODE(ctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensor",
CTLFLAG_RD, 0, "MAX6690 Sensor Information");
/* Now we can fill the properties into the allocated struct. */
sc->sc_nsensors = max6690_fill_sensor_prop(dev);
/* Add sysctls for the sensors. */
for (i = 0; i < sc->sc_nsensors; i++) {
for (j = 0; j < strlen(sc->sc_sensors[i].location); j++) {
sysctl_name[j] = tolower(sc->sc_sensors[i].location[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");
/* I use i to pass the sensor id. */
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "temp",
CTLTYPE_INT | CTLFLAG_RD, dev, i % 2,
max6690_sensor_sysctl, "IK",
"Sensor Temp in °C");
}
/* Dump sensor location & ID. */
if (bootverbose) {
device_printf(dev, "Sensors\n");
for (i = 0; i < sc->sc_nsensors; i++) {
device_printf(dev, "Location : %s ID: %d\n",
sc->sc_sensors[i].location,
sc->sc_sensors[i].id);
}
}
config_intrhook_disestablish(&sc->enum_hook);
}
static int
max6690_sensor_read(device_t dev, struct max6690_sensor *sens, int *temp)
{
uint8_t reg_int = 0, reg_ext = 0;
uint8_t integer;
uint8_t fraction;
struct max6690_softc *sc;
sc = device_get_softc(dev);
/* The internal sensor id's are even, the external ar odd. */
if ((sens->id % 2) == 0) {
reg_int = MAX6690_INT_TEMP;
reg_ext = MAX6690_IEXT_TEMP;
} else {
reg_int = MAX6690_EXT_TEMP;
reg_ext = MAX6690_EEXT_TEMP;
}
read_i2c_1(sc->sc_dev, sc->sc_addr, reg_int, &integer);
read_i2c_1(sc->sc_dev, sc->sc_addr, reg_ext, &fraction);
fraction &= MAX6690_TEMP_MASK;
/* The temperature is in tenth kelvin, the fractional part resolution
is 0.125.
*/
*temp = (integer * 10) + (fraction >> 5) * 10 / 8;
return (0);
}
static int
max6690_sensor_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev;
struct max6690_softc *sc;
struct max6690_sensor *sens;
int value = 0;
int error;
unsigned int temp;
dev = arg1;
sc = device_get_softc(dev);
sens = &sc->sc_sensors[arg2];
error = max6690_sensor_read(dev, sens, &value);
if (error != 0)
return (error);
temp = value + FCU_ZERO_C_TO_K;
error = sysctl_handle_int(oidp, &temp, 0, req);
return (error);
}
/* CPU A/B sensors, temp and adc: AD7417. */
#define SUPPLY_MON_A_ID 0x58
#define SUPPLY_MON_B_ID 0x5a
#define AD741X_TEMP 0x00
#define AD741X_CONFIG 0x01
#define AD741X_ADC 0x04
#define AD741X_CONFIG2 0x05
#define AD741X_CONFMASK 0xe0
uint8_t adc741x_config;
struct ad741x_sensor {
int id;
char location[32];
enum {
ADC741X_TEMP_SENSOR,
ADC741X_ADC_SENSOR
} type;
};
static int ad741x_probe(device_t);
static int ad741x_attach(device_t);
static int ad741x_sensor_sysctl(SYSCTL_HANDLER_ARGS);
static void ad741x_start(void *xdev);
struct ad741x_softc {
device_t sc_dev;
struct intr_config_hook enum_hook;
uint32_t sc_addr;
struct ad741x_sensor *sc_sensors;
int sc_nsensors;
};
static device_method_t ad741x_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ad741x_probe),
DEVMETHOD(device_attach, ad741x_attach),
{ 0, 0 },
};
static driver_t ad741x_driver = {
"sm",
ad741x_methods,
sizeof(struct ad741x_softc)
};
static devclass_t ad741x_devclass;
DRIVER_MODULE(sm, iicbus, ad741x_driver, ad741x_devclass, 0, 0);
MALLOC_DEFINE(M_SM, "sm", "Supply-Monitor AD741X");
static int
ad741x_init_adc(device_t dev, uint32_t addr)
{
uint8_t buf;
adc741x_config = 0;
/* Clear Config2 */
buf = 0;
write_i2c(dev, addr, AD741X_CONFIG2, &buf, 1);
/* Read & cache Config1 */
buf = 0;
write_i2c(dev, addr, AD741X_CONFIG, &buf, 1);
read_i2c_1(dev, addr, AD741X_CONFIG, &buf);
adc741x_config = (uint8_t)buf;
/* Disable shutdown mode */
adc741x_config &= 0xfe;
buf = adc741x_config;
write_i2c(dev, addr, AD741X_CONFIG, &buf, 1);
return (0);
}
static int
ad741x_probe(device_t dev)
{
const char *name, *compatible;
struct ad741x_softc *sc;
name = ofw_bus_get_name(dev);
compatible = ofw_bus_get_compat(dev);
if (!name)
return (ENXIO);
if (strcmp(name, "supply-monitor") != 0
|| strcmp(compatible, "ad7417") != 0)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
device_set_desc(dev, "Supply-Monitor AD741X");
return (0);
}
/*
* This function returns the number of sensors. If we call it the second time
* and we have allocated memory for sc->sc_sensors, we fill in the properties.
*/
static int
ad741x_fill_sensor_prop(device_t dev)
{
phandle_t child;
struct ad741x_softc *sc;
int i = 0, j, len = 0, prop_len, prev_len = 0;
sc = device_get_softc(dev);
child = ofw_bus_get_node(dev);
/* Fill the sensor location property. */
prop_len = OF_getproplen(child, "hwsensor-location");
char location[prop_len];
OF_getprop(child, "hwsensor-location", location, sizeof(location));
while (len < prop_len) {
if (sc->sc_sensors != NULL)
strcpy(sc->sc_sensors[i].location, location + len);
prev_len = strlen(location + len) + 1;
len += prev_len;
i++;
}
if (sc->sc_sensors == NULL)
return (i);
/* Fill the fan type property. */
len = 0;
i = 0;
prev_len = 0;
prop_len = OF_getproplen(child, "hwsensor-type");
char type[prop_len];
OF_getprop(child, "hwsensor-type", type, sizeof(type));
while (len < prop_len) {
if (strcmp(type + len, "temperature") == 0)
sc->sc_sensors[i].type = ADC741X_TEMP_SENSOR;
else
sc->sc_sensors[i].type = ADC741X_ADC_SENSOR;
prev_len = strlen(type + len) + 1;
len += prev_len;
i++;
}
/* Fill the sensor id property. Taken from OF. */
prop_len = OF_getproplen(child, "hwsensor-id");
u_int id[prop_len / 4];
OF_getprop(child, "hwsensor-id", id, sizeof(id));
for (j = 0; j < i; j++)
sc->sc_sensors[j].id = id[j];
return (i);
}
static int
ad741x_attach(device_t dev)
{
struct ad741x_softc *sc;
sc = device_get_softc(dev);
sc->enum_hook.ich_func = ad741x_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
ad741x_start(void *xdev)
{
phandle_t child;
struct ad741x_softc *sc;
struct sysctl_oid *oid, *sensroot_oid;
struct sysctl_ctx_list *ctx;
char sysctl_name[32];
int i, j;
const char *unit;
const char *desc;
device_t dev = (device_t)xdev;
sc = device_get_softc(dev);
sc->sc_nsensors = 0;
child = ofw_bus_get_node(dev);
/* Count the actual number of sensors. */
sc->sc_nsensors = ad741x_fill_sensor_prop(dev);
device_printf(dev, "AD741X # sensors: %d\n", sc->sc_nsensors);
if (sc->sc_nsensors == 0)
device_printf(dev, "WARNING: No AD741X sensors detected!\n");
sc->sc_sensors = malloc (sc->sc_nsensors * sizeof(struct ad741x_sensor),
M_SM, M_WAITOK | M_ZERO);
ctx = device_get_sysctl_ctx(dev);
/* XXXX better name for sensor root? */
sensroot_oid = SYSCTL_ADD_NODE(ctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensor",
CTLFLAG_RD, 0, "AD741X Sensor Information");
/* Now we can fill the properties into the allocated struct. */
sc->sc_nsensors = ad741x_fill_sensor_prop(dev);
/* Add sysctls for the sensors. */
for (i = 0; i < sc->sc_nsensors; i++) {
for (j = 0; j < strlen(sc->sc_sensors[i].location); j++) {
sysctl_name[j] = tolower(sc->sc_sensors[i].location[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 == ADC741X_TEMP_SENSOR) {
unit = "temp";
desc = "Sensor temp in C";
} else {
unit = "volt";
desc = "Sensor Volt in V";
}
/* I use i to pass the sensor id. */
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
unit, CTLTYPE_INT | CTLFLAG_RD, dev,
i, ad741x_sensor_sysctl,
sc->sc_sensors[i].type == ADC741X_TEMP_SENSOR ?
"IK" : "I", desc);
}
/* Dump sensor location, ID & type. */
if (bootverbose) {
device_printf(dev, "Sensors\n");
for (i = 0; i < sc->sc_nsensors; i++) {
device_printf(dev, "Location: %s ID: %d type: %d\n",
sc->sc_sensors[i].location,
sc->sc_sensors[i].id,
sc->sc_sensors[i].type);
}
}
config_intrhook_disestablish(&sc->enum_hook);
}
static int
ad741x_get_temp(device_t dev, uint32_t addr, int *temp)
{
uint16_t buf[2];
uint16_t read;
read_i2c_2(dev, addr, AD741X_TEMP, buf);
read = *((int16_t*)buf);
/* The ADC is 10 bit, the resolution is 0.25 C.
The temperature is in tenth kelvin.
*/
*temp = (((int16_t)(read & 0xffc0)) >> 6) * 25 / 10;
return (0);
}
static int
ad741x_get_adc(device_t dev, uint32_t addr, unsigned int *value,
uint8_t chan)
{
uint8_t cfg1, tmp;
uint16_t read, buf[2];
read_i2c_1(dev, addr, AD741X_CONFIG, &cfg1);
tmp = chan << 5;
cfg1 = (cfg1 & ~AD741X_CONFMASK) | (tmp & AD741X_CONFMASK);
write_i2c(dev, addr, AD741X_CONFIG, &cfg1, 1);
read_i2c_2(dev, addr, AD741X_ADC, buf);
read = *((uint16_t*)buf);
*value = ((uint32_t)read) >> 6;
return (0);
}
static int
ad741x_sensor_read(device_t dev, struct ad741x_sensor *sens, int *temp)
{
struct ad741x_softc *sc;
uint8_t chan;
sc = device_get_softc(dev);
/* Init the ADC. */
ad741x_init_adc(sc->sc_dev, sc->sc_addr);
if (sens->type == ADC741X_TEMP_SENSOR) {
ad741x_get_temp(sc->sc_dev, sc->sc_addr, temp);
*temp += FCU_ZERO_C_TO_K;
} else {
switch (sens->id) {
case 11:
case 16:
chan = 1;
break;
case 12:
case 17:
chan = 2;
break;
case 13:
case 18:
chan = 3;
break;
case 14:
case 19:
chan = 4;
break;
default:
chan = 1;
}
ad741x_get_adc(sc->sc_dev, sc->sc_addr, temp, chan);
}
return (0);
}
static int
ad741x_sensor_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev;
struct ad741x_softc *sc;
struct ad741x_sensor *sens;
int value = 0;
int error;
int temp;
dev = arg1;
sc = device_get_softc(dev);
sens = &sc->sc_sensors[arg2];
error = ad741x_sensor_read(dev, sens, &value);
if (error != 0)
return (error);
temp = value;
error = sysctl_handle_int(oidp, &temp, 0, req);
return (error);
}
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