/* $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 __KERNEL_RCSID(0, "$NetBSD: fcu.c,v 1.1 2018/03/08 23:25:56 macallan Exp $"); #include #include #include #include #include #include #include #include /* 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; } }