/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2012 Andreas Tobler * Copyright (c) 2014 Justin Hibbits * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* ADT746X registers. */ #define ADT746X_TACH1LOW 0x28 #define ADT746X_TACH1HIGH 0x29 #define ADT746X_TACH2LOW 0x2a #define ADT746X_TACH2HIGH 0x2b #define ADT746X_PWM1 0x30 #define ADT746X_PWM2 0x31 #define ADT746X_DEVICE_ID 0x3d #define ADT746X_COMPANY_ID 0x3e #define ADT746X_REV_ID 0x3f #define ADT746X_CONFIG 0x40 #define ADT746X_PWM1_CONF 0x5c #define ADT746X_PWM2_CONF 0x5d #define ADT746X_MANUAL_MASK 0xe0 #define ADT7460_DEV_ID 0x27 #define ADT7467_DEV_ID 0x68 struct adt746x_fan { struct pmac_fan fan; device_t dev; int id; int setpoint; int pwm_reg; int conf_reg; }; struct adt746x_sensor { struct pmac_therm therm; device_t dev; int id; cell_t reg; enum { ADT746X_SENSOR_TEMP, ADT746X_SENSOR_VOLT, ADT746X_SENSOR_SPEED } type; }; struct adt746x_softc { device_t sc_dev; struct intr_config_hook enum_hook; uint32_t sc_addr; /* The 7467 supports up to 4 fans, 2 voltage and 3 temperature sensors. */ struct adt746x_fan sc_fans[4]; int sc_nfans; struct adt746x_sensor sc_sensors[9]; int sc_nsensors; int device_id; }; /* Regular bus attachment functions */ static int adt746x_probe(device_t); static int adt746x_attach(device_t); /* Utility functions */ static void adt746x_attach_fans(device_t dev); static void adt746x_attach_sensors(device_t dev); static int adt746x_fill_fan_prop(device_t dev); static int adt746x_fill_sensor_prop(device_t dev); static int adt746x_fan_set_pwm(struct adt746x_fan *fan, int pwm); static int adt746x_fan_get_pwm(struct adt746x_fan *fan); static int adt746x_sensor_read(struct adt746x_sensor *sens); static void adt746x_start(void *xdev); /* i2c read/write functions. */ static int adt746x_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buf); static int adt746x_read(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data); static device_method_t adt746x_methods[] = { /* Device interface */ DEVMETHOD(device_probe, adt746x_probe), DEVMETHOD(device_attach, adt746x_attach), { 0, 0 }, }; static driver_t adt746x_driver = { "adt746x", adt746x_methods, sizeof(struct adt746x_softc) }; static devclass_t adt746x_devclass; DRIVER_MODULE(adt746x, iicbus, adt746x_driver, adt746x_devclass, 0, 0); static MALLOC_DEFINE(M_ADT746X, "adt746x", "ADT Sensor Information"); /* i2c read/write functions. */ static int adt746x_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff) { uint8_t buf[4]; int try = 0; struct iic_msg msg[] = { {addr, IIC_M_WR, 2, buf } }; /* Prepare the write msg. */ buf[0] = reg; memcpy(buf + 1, buff, 1); for (;;) { if (iicbus_transfer(dev, msg, 1) == 0) return (0); if (++try > 5) { device_printf(dev, "iicbus write failed\n"); return (-1); } pause("adt746x_write", hz); } return (0); } static int adt746x_read(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, ®}, {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("adt746x_read", hz); } } static int adt746x_probe(device_t dev) { const char *name, *compatible; struct adt746x_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, "adt7460") != 0 && strcmp(compatible, "adt7467") != 0)) return (ENXIO); sc = device_get_softc(dev); sc->sc_dev = dev; sc->sc_addr = iicbus_get_addr(dev); device_set_desc(dev, "Apple Thermostat Unit ADT746X"); return (0); } static int adt746x_attach(device_t dev) { struct adt746x_softc *sc; sc = device_get_softc(dev); sc->enum_hook.ich_func = adt746x_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 adt746x_start(void *xdev) { uint8_t did, cid, rev, conf; struct adt746x_softc *sc; device_t dev = (device_t)xdev; sc = device_get_softc(dev); adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_DEVICE_ID, &did); adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_COMPANY_ID, &cid); adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_REV_ID, &rev); adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_CONFIG, &conf); device_printf(dev, "Dev ID %#x, Company ID %#x, Rev ID %#x CNF: %#x\n", did, cid, rev, conf); /* We can get the device id either from 'of' properties or from the chip itself. This method makes sure we can read the chip, otherwise we return. */ sc->device_id = did; conf = 1; /* Start the ADT7460. */ if (sc->device_id == ADT7460_DEV_ID) adt746x_write(sc->sc_dev, sc->sc_addr, ADT746X_CONFIG, &conf); /* Detect and attach child devices. */ adt746x_attach_fans(dev); adt746x_attach_sensors(dev); config_intrhook_disestablish(&sc->enum_hook); } /* * Sensor and fan management */ static int adt746x_fan_set_pwm(struct adt746x_fan *fan, int pwm) { uint8_t reg = 0, manual, mode = 0; struct adt746x_softc *sc; uint8_t buf; sc = device_get_softc(fan->dev); /* Clamp to allowed range */ pwm = max(fan->fan.min_rpm, pwm); pwm = min(fan->fan.max_rpm, pwm); reg = fan->pwm_reg; mode = fan->conf_reg; /* From the 7460 datasheet: PWM dutycycle can be programmed from 0% (0x00) to 100% (0xFF) in steps of 0.39% (256 steps). */ buf = (pwm * 100 / 39) - (pwm ? 1 : 0); fan->setpoint = buf; /* Manual mode. */ adt746x_read(sc->sc_dev, sc->sc_addr, mode, &manual); manual |= ADT746X_MANUAL_MASK; adt746x_write(sc->sc_dev, sc->sc_addr, mode, &manual); /* Write speed. */ adt746x_write(sc->sc_dev, sc->sc_addr, reg, &buf); return (0); } static int adt746x_fan_get_pwm(struct adt746x_fan *fan) { uint8_t buf, reg; uint16_t pwm; struct adt746x_softc *sc; sc = device_get_softc(fan->dev); reg = fan->pwm_reg; adt746x_read(sc->sc_dev, sc->sc_addr, reg, &buf); pwm = (buf * 39 / 100) + (buf ? 1 : 0); return (pwm); } static int adt746x_fill_fan_prop(device_t dev) { phandle_t child; struct adt746x_softc *sc; u_int *id; char *location; int i, id_len, len = 0, location_len, prev_len = 0; sc = device_get_softc(dev); child = ofw_bus_get_node(dev); /* Fill the fan location property. */ location_len = OF_getprop_alloc(child, "hwctrl-location", (void **)&location); id_len = OF_getprop_alloc_multi(child, "hwctrl-id", sizeof(cell_t), (void **)&id); if (location_len == -1 || id_len == -1) { OF_prop_free(location); OF_prop_free(id); return 0; } /* Fill in all the properties for each fan. */ for (i = 0; i < id_len; i++) { strlcpy(sc->sc_fans[i].fan.name, location + len, 32); prev_len = strlen(location + len) + 1; len += prev_len; sc->sc_fans[i].id = id[i]; if (id[i] == 6) { sc->sc_fans[i].pwm_reg = ADT746X_PWM1; sc->sc_fans[i].conf_reg = ADT746X_PWM1_CONF; } else if (id[i] == 7) { sc->sc_fans[i].pwm_reg = ADT746X_PWM2; sc->sc_fans[i].conf_reg = ADT746X_PWM2_CONF; } else { sc->sc_fans[i].pwm_reg = ADT746X_PWM1 + i; sc->sc_fans[i].conf_reg = ADT746X_PWM1_CONF + i; } sc->sc_fans[i].dev = sc->sc_dev; sc->sc_fans[i].fan.min_rpm = 5; /* Percent */ sc->sc_fans[i].fan.max_rpm = 100; sc->sc_fans[i].fan.read = NULL; sc->sc_fans[i].fan.set = (int (*)(struct pmac_fan *, int))(adt746x_fan_set_pwm); sc->sc_fans[i].fan.default_rpm = sc->sc_fans[i].fan.max_rpm; } OF_prop_free(location); OF_prop_free(id); return (i); } static int adt746x_fill_sensor_prop(device_t dev) { phandle_t child, node; struct adt746x_softc *sc; char sens_type[32]; int i = 0, reg, sensid; sc = device_get_softc(dev); child = ofw_bus_get_node(dev); /* Fill in the sensor properties for each child. */ for (node = OF_child(child); node != 0; node = OF_peer(node)) { if (OF_getprop(node, "sensor-id", &sensid, sizeof(sensid)) == -1) continue; OF_getprop(node, "location", sc->sc_sensors[i].therm.name, 32); OF_getprop(node, "device_type", sens_type, sizeof(sens_type)); if (strcmp(sens_type, "temperature") == 0) sc->sc_sensors[i].type = ADT746X_SENSOR_TEMP; else if (strcmp(sens_type, "voltage") == 0) sc->sc_sensors[i].type = ADT746X_SENSOR_VOLT; else sc->sc_sensors[i].type = ADT746X_SENSOR_SPEED; OF_getprop(node, "reg", ®, sizeof(reg)); OF_getprop(node, "sensor-id", &sensid, sizeof(sensid)); /* This is the i2c register of the sensor. */ sc->sc_sensors[i].reg = reg; sc->sc_sensors[i].id = sensid; OF_getprop(node, "zone", &sc->sc_sensors[i].therm.zone, sizeof(sc->sc_sensors[i].therm.zone)); sc->sc_sensors[i].dev = dev; sc->sc_sensors[i].therm.read = (int (*)(struct pmac_therm *))adt746x_sensor_read; if (sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP) { /* Make up some ranges */ sc->sc_sensors[i].therm.target_temp = 500 + ZERO_C_TO_K; sc->sc_sensors[i].therm.max_temp = 800 + ZERO_C_TO_K; pmac_thermal_sensor_register(&sc->sc_sensors[i].therm); } i++; } return (i); } static int adt746x_fanrpm_sysctl(SYSCTL_HANDLER_ARGS) { device_t adt; struct adt746x_softc *sc; struct adt746x_fan *fan; int pwm = 0, error; adt = arg1; sc = device_get_softc(adt); fan = &sc->sc_fans[arg2]; pwm = adt746x_fan_get_pwm(fan); error = sysctl_handle_int(oidp, &pwm, 0, req); if (error || !req->newptr) return (error); return (adt746x_fan_set_pwm(fan, pwm)); } static void adt746x_attach_fans(device_t dev) { struct adt746x_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 = adt746x_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; } ctx = device_get_sysctl_ctx(dev); fanroot_oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "fans", CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "ADT Fan Information"); /* Now we can fill the properties into the allocated struct. */ sc->sc_nfans = adt746x_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; sc->sc_fans[i].setpoint = adt746x_fan_get_pwm(&sc->sc_fans[i]); oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid), OID_AUTO, sysctl_name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "Fan Information"); /* I use i to pass the fan id. */ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "pwm", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, dev, i, adt746x_fanrpm_sysctl, "I", "Fan PWM in %"); } /* Dump fan location & type. */ if (bootverbose) { for (i = 0; i < sc->sc_nfans; i++) { device_printf(dev, "Fan location: %s", sc->sc_fans[i].fan.name); device_printf(dev, " id: %d RPM: %d\n", sc->sc_fans[i].id, sc->sc_fans[i].setpoint); } } } static int adt746x_sensor_read(struct adt746x_sensor *sens) { struct adt746x_softc *sc; int tmp = 0; uint16_t val; uint8_t data[1], data1[1]; int8_t temp; sc = device_get_softc(sens->dev); if (sens->type != ADT746X_SENSOR_SPEED) { if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg, &temp) < 0) return (-1); if (sens->type == ADT746X_SENSOR_TEMP) tmp = 10 * temp + ZERO_C_TO_K; else tmp = temp; } else { if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg, data) < 0) return (-1); if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg + 1, data1) < 0) return (-1); val = data[0] + (data1[0] << 8); /* A value of 0xffff means the fan is stopped. */ if (val == 0 || val == 0xffff) tmp = 0; else tmp = (90000 * 60) / val; } return (tmp); } static int adt746x_sensor_sysctl(SYSCTL_HANDLER_ARGS) { device_t dev; struct adt746x_softc *sc; struct adt746x_sensor *sens; int value, error; dev = arg1; sc = device_get_softc(dev); sens = &sc->sc_sensors[arg2]; value = sens->therm.read(&sens->therm); if (value < 0) return (ENXIO); error = sysctl_handle_int(oidp, &value, 0, req); return (error); } static void adt746x_attach_sensors(device_t dev) { struct adt746x_softc *sc; struct sysctl_oid *oid, *sensroot_oid; struct sysctl_ctx_list *ctx; phandle_t child; char sysctl_name[40]; const char *unit; const char *desc; int i, j; sc = device_get_softc(dev); sc->sc_nsensors = 0; child = ofw_bus_get_node(dev); /* Count the actual number of sensors. */ sc->sc_nsensors = adt746x_fill_sensor_prop(dev); device_printf(dev, "%d sensors detected!\n", sc->sc_nsensors); if (sc->sc_nsensors == 0) { device_printf(dev, "WARNING: No sensors detected!\n"); return; } ctx = device_get_sysctl_ctx(dev); sensroot_oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensors", CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "ADT Sensor Information"); /* Add the sysctl for the sensors. */ for (i = 0; i < sc->sc_nsensors; i++) { for (j = 0; j < strlen(sc->sc_sensors[i].therm.name); j++) { sysctl_name[j] = tolower(sc->sc_sensors[i].therm.name[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 | CTLFLAG_MPSAFE, 0, "Sensor Information"); if (sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP) { unit = "temp"; desc = "sensor unit (C)"; } else if (sc->sc_sensors[i].type == ADT746X_SENSOR_VOLT) { unit = "volt"; desc = "sensor unit (mV)"; } else { unit = "rpm"; desc = "sensor unit (RPM)"; } /* I use i to pass the sensor id. */ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, unit, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, dev, i, adt746x_sensor_sysctl, sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP ? "IK" : "I", desc); } /* Dump sensor location & type. */ if (bootverbose) { for (i = 0; i < sc->sc_nsensors; i++) { device_printf(dev, "Sensor location: %s", sc->sc_sensors[i].therm.name); device_printf(dev, " type: %d id: %d reg: 0x%x\n", sc->sc_sensors[i].type, sc->sc_sensors[i].id, sc->sc_sensors[i].reg); } } }