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[src/trunk]: src/sys/dev/i2c preliminary driver for the fan control unit foun...
details: https://anonhg.NetBSD.org/src/rev/1d02b1101cce
branches: trunk
changeset: 831046:1d02b1101cce
user: macallan <macallan%NetBSD.org@localhost>
date: Thu Mar 08 23:25:56 2018 +0000
description:
preliminary driver for the fan control unit found in some G5
diffstat:
sys/dev/i2c/fcu.c | 200 ++++++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/i2c/files.i2c | 7 +-
2 files changed, 206 insertions(+), 1 deletions(-)
diffs (225 lines):
diff -r cc2581bdd539 -r 1d02b1101cce sys/dev/i2c/fcu.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/fcu.c Thu Mar 08 23:25:56 2018 +0000
@@ -0,0 +1,200 @@
+/* $NetBSD: fcu.c,v 1.1 2018/03/08 23:25:56 macallan Exp $ */
+
+/*-
+ * Copyright (c) 2018 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: fcu.c,v 1.1 2018/03/08 23:25:56 macallan Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/sysmon/sysmonvar.h>
+
+#include <dev/ofw/openfirm.h>
+
+/* FCU registers, from OpenBSD's fcu.c */
+#define FCU_FAN_FAIL 0x0b /* fans states in bits 0<1-6>7 */
+#define FCU_FAN_ACTIVE 0x0d
+#define FCU_FANREAD(x) 0x11 + (x)*2
+#define FCU_FANSET(x) 0x10 + (x)*2
+#define FCU_PWM_FAIL 0x2b
+#define FCU_PWM_ACTIVE 0x2d
+#define FCU_PWMREAD(x) 0x30 + (x)*2
+
+struct fcu_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+
+ struct sysmon_envsys *sc_sme;
+ envsys_data_t sc_sensors[32];
+ int sc_nsensors;
+};
+
+static int fcu_match(device_t, cfdata_t, void *);
+static void fcu_attach(device_t, device_t, void *);
+
+static void fcu_sensors_refresh(struct sysmon_envsys *, envsys_data_t *);
+
+CFATTACH_DECL_NEW(fcu, sizeof(struct fcu_softc),
+ fcu_match, fcu_attach, NULL, NULL);
+
+static const char * fcu_compats[] = {
+ "fcu",
+ NULL
+};
+
+static int
+fcu_match(device_t parent, cfdata_t match, void *aux)
+{
+ struct i2c_attach_args *ia = aux;
+
+ if (ia->ia_name == NULL) {
+ /* no ID registers on this chip */
+ if (ia->ia_addr == 0x2f)
+ return 1;
+ return 0;
+ } else {
+ return iic_compat_match(ia, fcu_compats);
+ }
+}
+
+static void
+fcu_attach(device_t parent, device_t self, void *aux)
+{
+ struct fcu_softc *sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ aprint_naive("\n");
+ aprint_normal(": Fan Control Unit\n");
+
+ 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 = fcu_sensors_refresh;
+
+ sc->sc_sensors[0].units = ENVSYS_SFANRPM;
+ sc->sc_sensors[1].state = ENVSYS_SINVALID;
+
+ /* round up sensors */
+ int ch;
+
+ sc->sc_nsensors = 0;
+ ch = OF_child(ia->ia_cookie);
+ while (ch != 0) {
+ char type[32], descr[32];
+ uint32_t reg;
+
+ envsys_data_t *s = &sc->sc_sensors[sc->sc_nsensors];
+
+ if (OF_getprop(ch, "device_type", type, 32) <= 0)
+ goto next;
+
+ if (strcmp(type, "fan-rpm-control") == 0) {
+ s->units = ENVSYS_SFANRPM;
+ } else if (strcmp(type, "fan-pwm-control") == 0) {
+ /* XXX we get the type from the register number */
+ s->units = ENVSYS_SFANRPM;
+/* skip those for now since we don't really know how to interpret them */
+#if 0
+ } else if (strcmp(type, "power-sensor") == 0) {
+ s->units = ENVSYS_SVOLTS_DC;
+#endif
+ } else if (strcmp(type, "gpi-sensor") == 0) {
+ s->units = ENVSYS_INDICATOR;
+ } else {
+ /* ignore other types for now */
+ goto next;
+ }
+
+ if (OF_getprop(ch, "reg", ®, sizeof(reg)) <= 0)
+ goto next;
+ s->private = reg;
+
+ if (OF_getprop(ch, "location", descr, 32) <= 0)
+ goto next;
+ strcpy(s->desc, descr);
+
+ sysmon_envsys_sensor_attach(sc->sc_sme, s);
+ sc->sc_nsensors++;
+next:
+ ch = OF_peer(ch);
+ }
+ sysmon_envsys_register(sc->sc_sme);
+}
+
+static void
+fcu_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
+{
+ struct fcu_softc *sc = sme->sme_cookie;
+ uint8_t cmd;
+ uint16_t data = -1;
+ int error;
+
+ if (edata->units == ENVSYS_SFANRPM) {
+ cmd = edata->private + 1;
+ } else
+ cmd = edata->private;
+
+ /* fcu is a macppc only thing so we can safely assume big endian */
+ iic_acquire_bus(sc->sc_i2c, 0);
+ error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP,
+ sc->sc_addr, &cmd, 1, &data, 2, 0);
+ iic_release_bus(sc->sc_i2c, 0);
+
+ if (error) {
+ edata->state = ENVSYS_SINVALID;
+ return;
+ }
+
+ edata->state = ENVSYS_SVALID;
+
+ switch (edata->units) {
+ case ENVSYS_SFANRPM:
+ edata->value_cur = data >> 3;
+ break;
+ case ENVSYS_SVOLTS_DC:
+ /* XXX this reads bogus */
+ edata->value_cur = data * 1000;
+ break;
+ case ENVSYS_INDICATOR:
+ /* guesswork for now */
+ edata->value_cur = data >> 8;
+ break;
+ default:
+ edata->state = ENVSYS_SINVALID;
+ }
+}
diff -r cc2581bdd539 -r 1d02b1101cce sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c Thu Mar 08 23:02:50 2018 +0000
+++ b/sys/dev/i2c/files.i2c Thu Mar 08 23:25:56 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.84 2018/02/13 13:19:30 uwe Exp $
+# $NetBSD: files.i2c,v 1.85 2018/03/08 23:25:56 macallan Exp $
obsolete defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -304,6 +304,11 @@
attach em3027rtc at iic
file dev/i2c/em3027.c em3027rtc
+# Apple Fan Control Unit found in some G5
+device fcu: sysmon_envsys
+attach fcu at iic
+file dev/i2c/fcu.c fcu
+
# HID over i2c
# HID "bus"
define ihidbus {[ reportid = -1 ]}
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