/* $NetBSD: smsc.c,v 1.8 2008/04/28 20:23:52 martin Exp $ */ /*- * Copyright (c) 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Brett Lymn. * * 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. */ /* * This is a driver for the Standard Microsystems Corp (SMSC) * LPC47B397 "super i/o" chip. This driver only handles the environment * monitoring capabilities of the chip, the other functions will be * probed/matched as "normal" PC hardware devices (serial ports, fdc, so on). * SMSC has not deigned to release a datasheet for this particular chip * (though they do for others they make) so this driver was written from * information contained in the comment block for the Linux driver. */ #include __KERNEL_RCSID(0, "$NetBSD: smsc.c,v 1.8 2008/04/28 20:23:52 martin Exp $"); #include #include #include #include #include #include #include #include #if defined(LMDEBUG) #define DPRINTF(x) do { printf x; } while (0) #else #define DPRINTF(x) #endif static int smsc_match(device_t, cfdata_t, void *); static void smsc_attach(device_t, device_t, void *); static int smsc_detach(device_t, int); static uint8_t smsc_readreg(bus_space_tag_t, bus_space_handle_t, int); static void smsc_writereg(bus_space_tag_t, bus_space_handle_t, int, int); static void smsc_refresh(struct sysmon_envsys *, envsys_data_t *); CFATTACH_DECL_NEW(smsc, sizeof(struct smsc_softc), smsc_match, smsc_attach, smsc_detach, NULL); /* * Probe for the SMSC Super I/O chip */ static int smsc_match(device_t parent, cfdata_t match, void *aux) { bus_space_handle_t ioh; struct isa_attach_args *ia = aux; int rv; uint8_t cr; /* Must supply an address */ if (ia->ia_nio < 1) return 0; if (ISA_DIRECT_CONFIG(ia)) return 0; if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) return 0; if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) return 0; /* To get the device ID we must enter config mode... */ bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_START); /* Then select the device id register */ cr = smsc_readreg(ia->ia_iot, ioh, SMSC_DEVICE_ID); /* Exit config mode, apparently this is important to do */ bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_END); switch (cr) { case SMSC_ID_47B397: case SMSC_ID_SCH5307NS: case SMSC_ID_SCH5317: rv = 1; break; default: rv = 0; break; } DPRINTF(("smsc: rv = %d, cr = %x\n", rv, cr)); bus_space_unmap(ia->ia_iot, ioh, 2); if (rv) { ia->ia_nio = 1; ia->ia_io[0].ir_size = 2; ia->ia_niomem = 0; ia->ia_nirq = 0; ia->ia_ndrq = 0; } return rv; } /* * Get the base address for the monitoring registers and set up the * sysmon_envsys(9) framework. */ static void smsc_attach(device_t parent, device_t self, void *aux) { struct smsc_softc *sc = device_private(self); struct isa_attach_args *ia = aux; bus_space_handle_t ioh; uint8_t rev, msb, lsb, chipid; unsigned address; int i; sc->sc_iot = ia->ia_iot; aprint_naive("\n"); /* * To attach we need to find the actual Hardware Monitor * I/O address space. */ if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) { aprint_error(": can't map base i/o space\n"); return; } /* Enter config mode */ bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_START); /* * While we have the base registers mapped, grab the chip * revision and device ID. */ rev = smsc_readreg(ia->ia_iot, ioh, SMSC_DEVICE_REVISION); chipid = smsc_readreg(ia->ia_iot, ioh, SMSC_DEVICE_ID); /* Select the Hardware Monitor LDN */ smsc_writereg(ia->ia_iot, ioh, SMSC_LOGICAL_DEV_SEL, SMSC_LOGICAL_DEVICE); /* Read the base address for the registers. */ msb = smsc_readreg(ia->ia_iot, ioh, SMSC_IO_BASE_MSB); lsb = smsc_readreg(ia->ia_iot, ioh, SMSC_IO_BASE_LSB); address = (msb << 8) | lsb; /* Exit config mode */ bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_END); bus_space_unmap(ia->ia_iot, ioh, 2); /* Map the Hardware Monitor I/O space. */ if (bus_space_map(ia->ia_iot, address, 2, 0, &sc->sc_ioh)) { aprint_error(": can't map register i/o space\n"); return; } sc->sc_sme = sysmon_envsys_create(); #define INITSENSOR(index, string, reg, type) \ do { \ strlcpy(sc->sc_sensor[index].desc, string, \ sizeof(sc->sc_sensor[index].desc)); \ sc->sc_sensor[index].units = type; \ sc->sc_regs[index] = reg; \ sc->sc_sensor[index].state = ENVSYS_SVALID; \ } while (/* CONSTCOND */ 0) /* Temperature sensors */ INITSENSOR(0, "Temp0", SMSC_TEMP1, ENVSYS_STEMP); INITSENSOR(1, "Temp1", SMSC_TEMP2, ENVSYS_STEMP); INITSENSOR(2, "Temp2", SMSC_TEMP3, ENVSYS_STEMP); INITSENSOR(3, "Temp3", SMSC_TEMP4, ENVSYS_STEMP); /* Fan sensors */ INITSENSOR(4, "Fan0", SMSC_FAN1_LSB, ENVSYS_SFANRPM); INITSENSOR(5, "Fan1", SMSC_FAN2_LSB, ENVSYS_SFANRPM); INITSENSOR(6, "Fan2", SMSC_FAN3_LSB, ENVSYS_SFANRPM); INITSENSOR(7, "Fan3", SMSC_FAN4_LSB, ENVSYS_SFANRPM); for (i = 0; i < SMSC_MAX_SENSORS; i++) { if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor[i])) { sysmon_envsys_destroy(sc->sc_sme); bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); return; } } sc->sc_sme->sme_name = device_xname(self); sc->sc_sme->sme_cookie = sc; sc->sc_sme->sme_refresh = smsc_refresh; if ((i = sysmon_envsys_register(sc->sc_sme)) != 0) { aprint_error(": unable to register with sysmon (%d)\n", i); sysmon_envsys_destroy(sc->sc_sme); bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); return; } switch (chipid) { case SMSC_ID_47B397: aprint_normal(": SMSC LPC47B397 Super I/O"); break; case SMSC_ID_SCH5307NS: aprint_normal(": SMSC SCH5307-NS Super I/O"); break; case SMSC_ID_SCH5317: aprint_normal(": SMSC SCH5317 Super I/O"); break; } aprint_normal(" (rev %u)\n", rev); aprint_normal_dev(self, "Hardware Monitor registers at 0x%04x\n", address); } static int smsc_detach(struct device *self, int flags) { struct smsc_softc *sc = device_private(self); sysmon_envsys_unregister(sc->sc_sme); bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2); return 0; } /* * Read the value of the given register */ static uint8_t smsc_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg) { bus_space_write_1(iot, ioh, SMSC_ADDR, reg); return bus_space_read_1(iot, ioh, SMSC_DATA); } /* * Write the given value to the given register. */ static void smsc_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val) { bus_space_write_1(iot, ioh, SMSC_ADDR, reg); bus_space_write_1(iot, ioh, SMSC_DATA, val); } /* convert temperature read from the chip to micro kelvin */ static inline int smsc_temp2muk(uint8_t t) { int temp=t; return temp * 1000000 + 273150000U; } /* * convert register value read from chip into rpm using: * * RPM = 60/(Count * 11.111us) * * 1/1.1111us = 90kHz * */ static inline int smsc_reg2rpm(unsigned int r) { unsigned long rpm; if (r == 0x0) return 0; rpm = (90000 * 60) / ((unsigned long) r); return (int) rpm; } /* min and max temperatures in uK */ #define SMSC_MIN_TEMP_UK ((-127 * 1000000) + 273150000) #define SMSC_MAX_TEMP_UK ((127 * 1000000) + 273150000) /* * Get the data for the requested sensor, update the sysmon structure * with the retrieved value. */ static void smsc_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) { struct smsc_softc *sc = sme->sme_cookie; int reg; unsigned int rpm; uint8_t msb, lsb; reg = sc->sc_regs[edata->sensor]; switch (edata->units) { case ENVSYS_STEMP: edata->value_cur = smsc_temp2muk(smsc_readreg(sc->sc_iot, sc->sc_ioh, reg)); break; case ENVSYS_SFANRPM: /* reading lsb first locks msb... */ lsb = smsc_readreg(sc->sc_iot, sc->sc_ioh, reg); msb = smsc_readreg(sc->sc_iot, sc->sc_ioh, reg + 1); rpm = (msb << 8) | lsb; edata->value_cur = smsc_reg2rpm(rpm); break; } }