/* $NetBSD: psoc.c,v 1.8 2021/06/18 23:00:47 macallan Exp $ */
/*-
* Copyright (c) 2019 Michael Lorenz
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* fan controller found in 1GHz TiBook
*
* register values from OF:
* fan1 - 0x20 ( status ), 0x31 ( data )
* fan2 - 0x26 ( status ), 0x45 ( data )
* fan status byte 0:
* 0x5* - fan is running, 0x6* - fan stopped
* byte 1: unknown, 0x80 seems always set, lower bits seem to fluctuate
* byte 2: lower 6 bit seem to indicate speed
* fan speed may be lower 6 bit of byte 2 and lower 6 of byte 1
* temperature sensors start at 6, two bytes each, first appears to be
* the temperature in degrees Celsius
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: psoc.c,v 1.8 2021/06/18 23:00:47 macallan Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/time.h>
#include <dev/ofw/openfirm.h>
#include <dev/i2c/i2cvar.h>
#include <dev/sysmon/sysmonvar.h>
#include "opt_psoc.h"
#ifdef PSOC_DEBUG
#define DPRINTF printf
#else
#define DPRINTF if (0) printf
#endif
struct psoc_softc {
device_t sc_dev;
i2c_tag_t sc_i2c;
i2c_addr_t sc_addr;
int sc_node;
struct sysmon_envsys *sc_sme;
envsys_data_t sc_sensors[7];
int sc_nsensors;
uint8_t sc_temp[16];
time_t sc_last;
};
static int psoc_match(device_t, cfdata_t, void *);
static void psoc_attach(device_t, device_t, void *);
static void psoc_sensors_refresh(struct sysmon_envsys *, envsys_data_t *);
static void psoc_dump(struct psoc_softc *);
CFATTACH_DECL_NEW(psoc, sizeof(struct psoc_softc),
psoc_match, psoc_attach, NULL, NULL);
static const struct device_compatible_entry compat_data[] = {
{ .compat = "Psoc" },
DEVICE_COMPAT_EOL
};
static int
psoc_match(device_t parent, cfdata_t match, void *aux)
{
struct i2c_attach_args *ia = aux;
int match_result;
if (iic_use_direct_match(ia, match, compat_data, &match_result))
return match_result;
return 0;
}
static void
psoc_attach(device_t parent, device_t self, void *aux)
{
struct psoc_softc *sc = device_private(self);
struct i2c_attach_args *ia = aux;
char path[256];
envsys_data_t *s;
int error, ih, r, i;
sc->sc_dev = self;
sc->sc_i2c = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
sc->sc_node = ia->ia_cookie;
sc->sc_last = 0;
aprint_naive("\n");
aprint_normal(": Psoc fan controller\n");
error = OF_package_to_path(sc->sc_node, path, 256);
path[error] = 0;
DPRINTF("path [%s]\n", path);
ih = OF_open("fan");
OF_call_method_1("fan-init", ih, 0);
DPRINTF("ih %08x\n", ih);
sc->sc_sme = sysmon_envsys_create();
sc->sc_sme->sme_name = device_xname(self);
sc->sc_sme->sme_cookie = sc;
sc->sc_sme->sme_refresh = psoc_sensors_refresh;
sc->sc_nsensors = 0;
psoc_dump(sc);
for (i = 0; i < 4; i++) {
r = i * 2 + 6;
s = &sc->sc_sensors[sc->sc_nsensors];
s->state = ENVSYS_SINVALID;
s->units = ENVSYS_STEMP;
snprintf(s->desc, 16, "temp%d", i);
s->private = r;
sysmon_envsys_sensor_attach(sc->sc_sme, s);
sc->sc_nsensors++;
}
for (r = 0x20; r < 0x2b; r += 0x06) {
s = &sc->sc_sensors[sc->sc_nsensors];
s->state = ENVSYS_SINVALID;
s->units = ENVSYS_SFANRPM;
snprintf(s->desc, 16, "reg %02x", r);
s->private = r;
sysmon_envsys_sensor_attach(sc->sc_sme, s);
sc->sc_nsensors++;
}
sysmon_envsys_register(sc->sc_sme);
}
static void
psoc_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
{
struct psoc_softc *sc = sme->sme_cookie;
uint8_t cmd = 6;
uint8_t buf[0x28];
int error = 1, data;
if ( edata->private < 0x20) {
cmd = 0;
if ((time_second - sc->sc_last) > 2) {
iic_acquire_bus(sc->sc_i2c, 0);
error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, 1, sc->sc_temp, 16, 0);
iic_release_bus(sc->sc_i2c, 0);
if (error) return;
sc->sc_last = time_second;
}
error = 0;
if (edata->private > 0) {
data = sc->sc_temp[edata->private];
/* Celsius -> microkelvin */
edata->value_cur = ((int)data * 1000000) + 273150000;
}
#ifdef PSOC_DEBUG
if (edata->private == 6)
psoc_dump(sc);
#endif
} else {
cmd = edata->private;
iic_acquire_bus(sc->sc_i2c, 0);
error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, 1, buf, 3, 0);
iic_release_bus(sc->sc_i2c, 0);
if (error) return;
switch (buf[0] & 0xf0) {
case 0x50:
data = buf[edata->private - 0x20];
edata->value_cur = ((buf[2] & 0x3f) << 6) |
(buf[1] & 0x3f);
break;
case 0x60:
edata->value_cur = 0;
break;
default:
error = 0;
}
}
if (error) {
edata->state = ENVSYS_SINVALID;
} else {
edata->state = ENVSYS_SVALID;
}
}
static void
psoc_dump(struct psoc_softc *sc)
{
int i, j;
uint8_t data, cmd;
iic_acquire_bus(sc->sc_i2c, 0);
for (i = 0x20; i < 0x5f; i+= 8) {
printf("%02x:", i);
for (j = 0; j < 8; j++) {
cmd = i + j;
data = 0;
iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, 1, &data, 1, 0);
printf(" %02x", data);
}
printf("\n");
}
iic_release_bus(sc->sc_i2c, 0);
}