/* $OpenBSD: it.c,v 1.32 2008/04/07 17:50:37 form Exp $ */ /* * Copyright (c) 2007-2008 Oleg Safiullin * Copyright (c) 2006-2007 Juan Romero Pardines * Copyright (c) 2003 Julien Bordet * 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 #if defined(ITDEBUG) #define DPRINTF(x) do { printf x; } while (0) #else #define DPRINTF(x) #endif int it_match(struct device *, void *, void *); void it_attach(struct device *, struct device *, void *); u_int8_t it_readreg(bus_space_tag_t, bus_space_handle_t, int); void it_writereg(bus_space_tag_t, bus_space_handle_t, int, u_int8_t); void it_enter(bus_space_tag_t, bus_space_handle_t, int); void it_exit(bus_space_tag_t, bus_space_handle_t); u_int8_t it_ec_readreg(struct it_softc *, int); void it_ec_writereg(struct it_softc *, int, u_int8_t); void it_ec_refresh(void *arg); int it_wdog_cb(void *, int); /* * IT87-compatible chips can typically measure voltages up to 4.096 V. * To measure higher voltages the input is attenuated with (external) * resistors. Negative voltages are measured using a reference * voltage. So we have to convert the sensor values back to real * voltages by applying the appropriate resistor factor. */ #define RFACT_NONE 10000 #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) struct { int type; const char *desc; } it_sensors[IT_EC_NUMSENSORS] = { #define IT_TEMP_BASE 0 #define IT_TEMP_COUNT 3 { SENSOR_TEMP, NULL }, { SENSOR_TEMP, NULL }, { SENSOR_TEMP, NULL }, #define IT_FAN_BASE 3 #define IT_FAN_COUNT 3 { SENSOR_FANRPM, NULL }, { SENSOR_FANRPM, NULL }, { SENSOR_FANRPM, NULL }, #define IT_VOLT_BASE 6 #define IT_VOLT_COUNT 9 { SENSOR_VOLTS_DC, "VCORE_A" }, { SENSOR_VOLTS_DC, "VCORE_B" }, { SENSOR_VOLTS_DC, "+3.3V" }, { SENSOR_VOLTS_DC, "+5V" }, { SENSOR_VOLTS_DC, "+12V" }, { SENSOR_VOLTS_DC, "-5V" }, { SENSOR_VOLTS_DC, "-12V" }, { SENSOR_VOLTS_DC, "+5VSB" }, { SENSOR_VOLTS_DC, "VBAT" } }; /* rfact values for voltage sensors */ int it_vrfact[IT_VOLT_COUNT] = { RFACT_NONE, /* VCORE_A */ RFACT_NONE, /* VCORE_A */ RFACT_NONE, /* +3.3V */ RFACT(68, 100), /* +5V */ RFACT(30, 10), /* +12V */ RFACT(21, 10), /* -5V */ RFACT(83, 20), /* -12V */ RFACT(68, 100), /* +5VSB */ RFACT_NONE /* VBAT */ }; LIST_HEAD(, it_softc) it_softc_list = LIST_HEAD_INITIALIZER(&it_softc_list); int it_match(struct device *parent, void *match, void *aux) { struct isa_attach_args *ia = aux; struct it_softc *sc; bus_space_handle_t ioh; int ec_iobase, found = 0; u_int16_t cr; if (ia->ipa_io[0].base != IO_IT1 && ia->ipa_io[0].base != IO_IT2) return (0); /* map i/o space */ if (bus_space_map(ia->ia_iot, ia->ipa_io[0].base, 2, 0, &ioh) != 0) { DPRINTF(("it_match: can't map i/o space")); return (0); } /* enter MB PnP mode */ it_enter(ia->ia_iot, ioh, ia->ipa_io[0].base); /* * SMSC or similar SuperIO chips use 0x55 magic to enter PnP mode * and 0xaa to exit. These chips also enter PnP mode via ITE * `enter MB PnP mode' sequence, so force chip to exit PnP mode * if this is the case. */ bus_space_write_1(ia->ia_iot, ioh, IT_IO_ADDR, 0xaa); /* get chip id */ cr = it_readreg(ia->ia_iot, ioh, IT_CHIPID1) << 8; cr |= it_readreg(ia->ia_iot, ioh, IT_CHIPID2); switch (cr) { case IT_ID_8705: case IT_ID_8712: case IT_ID_8716: case IT_ID_8718: case IT_ID_8726: /* get environment controller base address */ it_writereg(ia->ia_iot, ioh, IT_LDN, IT_EC_LDN); ec_iobase = it_readreg(ia->ia_iot, ioh, IT_EC_MSB) << 8; ec_iobase |= it_readreg(ia->ia_iot, ioh, IT_EC_LSB); /* check if device already attached */ LIST_FOREACH(sc, &it_softc_list, sc_list) if (sc->sc_ec_iobase == ec_iobase) break; if (sc == NULL) { ia->ipa_nio = 1; ia->ipa_io[0].length = 2; ia->ipa_nmem = ia->ipa_nirq = ia->ipa_ndrq = 0; found++; } break; } /* exit MB PnP mode */ it_exit(ia->ia_iot, ioh); /* unmap i/o space */ bus_space_unmap(ia->ia_iot, ioh, 2); return (found); } void it_attach(struct device *parent, struct device *self, void *aux) { struct it_softc *sc = (void *)self; struct isa_attach_args *ia = aux; int i; u_int8_t cr; sc->sc_iot = ia->ia_iot; sc->sc_iobase = ia->ipa_io[0].base; if (bus_space_map(sc->sc_iot, sc->sc_iobase, 2, 0, &sc->sc_ioh) != 0) { printf(": can't map i/o space\n"); return; } /* enter MB PnP mode */ it_enter(sc->sc_iot, sc->sc_ioh, sc->sc_iobase); /* get chip id and rev */ sc->sc_chipid = it_readreg(sc->sc_iot, sc->sc_ioh, IT_CHIPID1) << 8; sc->sc_chipid |= it_readreg(sc->sc_iot, sc->sc_ioh, IT_CHIPID2); sc->sc_chiprev = it_readreg(sc->sc_iot, sc->sc_ioh, IT_CHIPREV); /* get environment controller base address */ it_writereg(sc->sc_iot, sc->sc_ioh, IT_LDN, IT_EC_LDN); sc->sc_ec_iobase = it_readreg(sc->sc_iot, sc->sc_ioh, IT_EC_MSB) << 8; sc->sc_ec_iobase |= it_readreg(sc->sc_iot, sc->sc_ioh, IT_EC_LSB); /* initialize watchdog */ if (sc->sc_chipid != IT_ID_8705) { it_writereg(sc->sc_iot, sc->sc_ioh, IT_LDN, IT_WDT_LDN); it_writereg(sc->sc_iot, sc->sc_ioh, IT_WDT_CSR, 0x00); it_writereg(sc->sc_iot, sc->sc_ioh, IT_WDT_TCR, IT_WDT_TCR_SECS); wdog_register(sc, it_wdog_cb); } /* exit MB PnP mode and unmap */ it_exit(sc->sc_iot, sc->sc_ioh); LIST_INSERT_HEAD(&it_softc_list, sc, sc_list); printf(": IT%xF rev 0x%02x", sc->sc_chipid, sc->sc_chiprev); if (sc->sc_ec_iobase == 0) { printf(", EC disabled\n"); return; } printf(", EC port 0x%x\n", sc->sc_ec_iobase); /* map environment controller i/o space */ sc->sc_ec_iot = ia->ia_iot; if (bus_space_map(sc->sc_ec_iot, sc->sc_ec_iobase, 8, 0, &sc->sc_ec_ioh) != 0) { printf("%s: can't map EC i/o space\n", sc->sc_dev.dv_xname); return; } /* initialize sensor structures */ for (i = 0; i < IT_EC_NUMSENSORS; i++) { sc->sc_sensors[i].type = it_sensors[i].type; if (it_sensors[i].desc != NULL) strlcpy(sc->sc_sensors[i].desc, it_sensors[i].desc, sizeof(sc->sc_sensors[i].desc)); } /* register update task */ if (sensor_task_register(sc, it_ec_refresh, IT_EC_INTERVAL) == NULL) { printf(": unable to register update task\n", sc->sc_dev.dv_xname); bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8); return; } /* activate monitoring */ cr = it_ec_readreg(sc, IT_EC_CFG); it_ec_writereg(sc, IT_EC_CFG, cr | 0x09); /* initialize sensors */ strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname, sizeof(sc->sc_sensordev.xname)); for (i = 0; i < IT_EC_NUMSENSORS; i++) sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]); sensordev_install(&sc->sc_sensordev); } u_int8_t it_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int r) { bus_space_write_1(iot, ioh, IT_IO_ADDR, r); return (bus_space_read_1(iot, ioh, IT_IO_DATA)); } void it_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int r, u_int8_t v) { bus_space_write_1(iot, ioh, IT_IO_ADDR, r); bus_space_write_1(iot, ioh, IT_IO_DATA, v); } void it_enter(bus_space_tag_t iot, bus_space_handle_t ioh, int iobase) { bus_space_write_1(iot, ioh, IT_IO_ADDR, 0x87); bus_space_write_1(iot, ioh, IT_IO_ADDR, 0x01); bus_space_write_1(iot, ioh, IT_IO_ADDR, 0x55); if (iobase == IO_IT1) bus_space_write_1(iot, ioh, IT_IO_ADDR, 0x55); else bus_space_write_1(iot, ioh, IT_IO_ADDR, 0xaa); } void it_exit(bus_space_tag_t iot, bus_space_handle_t ioh) { bus_space_write_1(iot, ioh, IT_IO_ADDR, IT_CCR); bus_space_write_1(iot, ioh, IT_IO_DATA, 0x02); } u_int8_t it_ec_readreg(struct it_softc *sc, int r) { bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, IT_EC_ADDR, r); return (bus_space_read_1(sc->sc_ec_iot, sc->sc_ec_ioh, IT_EC_DATA)); } void it_ec_writereg(struct it_softc *sc, int r, u_int8_t v) { bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, IT_EC_ADDR, r); bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, IT_EC_DATA, v); } void it_ec_refresh(void *arg) { struct it_softc *sc = arg; int i, sdata, mode, divisor, odivisor, ndivisor; /* refresh temp sensors */ for (i = 0; i < IT_TEMP_COUNT; i++) { sdata = it_ec_readreg(sc, IT_EC_TEMPBASE + i); /* convert to degF */ sc->sc_sensors[IT_TEMP_BASE + i].value = sdata * 1000000 + 273150000; } /* refresh volt sensors */ for (i = 0; i < IT_VOLT_COUNT; i++) { sdata = it_ec_readreg(sc, IT_EC_VOLTBASE + i); /* voltage returned as (mV >> 4) */ sc->sc_sensors[IT_VOLT_BASE + i].value = sdata << 4; /* these two values are negative and formula is different */ if (i == 5 || i == 6) sc->sc_sensors[IT_VOLT_BASE + i].value -= IT_EC_VREF; /* rfact is (factor * 10^4) */ sc->sc_sensors[IT_VOLT_BASE + i].value *= it_vrfact[i]; /* division by 10 gets us back to uVDC */ sc->sc_sensors[IT_VOLT_BASE + i].value /= 10; if (i == 5 || i == 6) sc->sc_sensors[IT_VOLT_BASE + i].value += IT_EC_VREF * 1000; } /* refresh fan sensors */ if (sc->sc_chipid == IT_ID_8705 || sc->sc_chipid == IT_ID_8712) odivisor = ndivisor = divisor = it_ec_readreg(sc, IT_EC_FAN_DIV); else { mode = it_ec_readreg(sc, IT_EC_FAN_ECR); divisor = -1; } for (i = 0; i < IT_FAN_COUNT; i++) { sc->sc_sensors[IT_FAN_BASE + i].flags &= ~SENSOR_FINVALID; sdata = it_ec_readreg(sc, IT_EC_FANBASE + i); if (divisor != -1) { /* * Use 8-bit FAN Tachometer & FAN Divisor registers */ if (sdata == 0xff) { sc->sc_sensors[IT_FAN_BASE + i].flags |= SENSOR_FINVALID; if (i == 2) ndivisor ^= 0x40; else { ndivisor &= ~(7 << (i * 3)); ndivisor |= ((divisor + 1) & 7) << (i * 3); } } else if (sdata != 0) { if (i == 2) divisor = divisor & 1 ? 3 : 1; sc->sc_sensors[IT_FAN_BASE + i].value = 1350000 / (sdata << (divisor & 7)); } else sc->sc_sensors[IT_FAN_BASE + i].value = 0; if (ndivisor != odivisor) it_ec_writereg(sc, IT_EC_FAN_DIV, ndivisor); } else { /* * Use 16-bit FAN tachometer register */ if (mode & (1 << i)) sdata |= it_ec_readreg(sc, IT_EC_FANEXTBASE + i) << 8; if (sdata == ((mode & (1 << i)) ? 0xffff : 0xff)) sc->sc_sensors[IT_FAN_BASE + i].flags |= SENSOR_FINVALID; else if (sdata != 0) sc->sc_sensors[IT_FAN_BASE + i].value = 675000 / sdata; else sc->sc_sensors[IT_FAN_BASE + i].value = 0; } } } int it_wdog_cb(void *arg, int period) { struct it_softc *sc = arg; /* enter MB PnP mode and select WDT device */ it_enter(sc->sc_iot, sc->sc_ioh, sc->sc_iobase); it_writereg(sc->sc_iot, sc->sc_ioh, IT_LDN, IT_WDT_LDN); /* disable watchdog timeout */ it_writereg(sc->sc_iot, sc->sc_ioh, IT_WDT_TCR, IT_WDT_TCR_SECS); /* 1000s should be enough for everyone */ if (period > 1000) period = 1000; else if (period < 0) period = 0; /* set watchdog timeout */ it_writereg(sc->sc_iot, sc->sc_ioh, IT_WDT_TMO_MSB, period >> 8); it_writereg(sc->sc_iot, sc->sc_ioh, IT_WDT_TMO_LSB, period & 0xff); if (period > 0) /* enable watchdog timeout */ it_writereg(sc->sc_iot, sc->sc_ioh, IT_WDT_TCR, IT_WDT_TCR_SECS | IT_WDT_TCR_KRST); /* exit MB PnP mode */ it_exit(sc->sc_iot, sc->sc_ioh); return (period); } struct cfattach it_ca = { sizeof(struct it_softc), it_match, it_attach }; struct cfdriver it_cd = { NULL, "it", DV_DULL };