332 lines
8.2 KiB
C
332 lines
8.2 KiB
C
/* $NetBSD: smscmon.c,v 1.1 2010/02/22 03:50:56 pgoyette Exp $ */
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/*
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* Copyright (c) 2009 Takahiro Hayashi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smscmon.c,v 1.1 2010/02/22 03:50:56 pgoyette Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <dev/i2c/i2cvar.h>
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#include <dev/sysmon/sysmonvar.h>
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#include <dev/i2c/smscmonvar.h>
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/*
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* A driver for SMSC LPC47M192 hardware monitor at SMBus.
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* This driver supports 8 Voltage and 3 Temperature sensors.
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* Fan RPM monitoring is not supported in this driver because
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* they are seen on ISA bus.
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*
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* Datasheet available (as of Feb. 20, 2010) at
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* http://pdf1.alldatasheet.com/datasheet-pdf/view/109752/SMSC/LPC47M192-NC.html
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*/
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static int smscmon_match(device_t, cfdata_t, void *);
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static void smscmon_attach(device_t, device_t, void *);
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static uint8_t smscmon_readreg(struct smscmon_sc *, int);
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static void smscmon_writereg(struct smscmon_sc *, int, int);
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static void smscmon_sensors_setup(struct smscmon_sc *, struct smscmon_sensor *);
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static void smscmon_refresh_volt(struct smscmon_sc *, envsys_data_t *);
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static void smscmon_refresh_temp(struct smscmon_sc *, envsys_data_t *);
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static void smscmon_refresh(struct sysmon_envsys *, envsys_data_t *);
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CFATTACH_DECL_NEW(smscmon, sizeof(struct smscmon_sc),
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smscmon_match, smscmon_attach, NULL, NULL);
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static struct smscmon_sensor smscmon_lpc47m192[] = {
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{
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.desc = "+2.5V",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x20,
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.refresh = smscmon_refresh_volt,
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.vmin = 13000,
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.vmax = 3320000
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},
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{
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.desc = "Vccp",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x21,
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.refresh = smscmon_refresh_volt,
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.vmin = 12000,
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.vmax = 2988000
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},
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{
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.desc = "+3.3V",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x22,
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.refresh = smscmon_refresh_volt,
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.vmin = 17000,
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.vmax = 4383000
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},
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{
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.desc = "+5V",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x23,
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.refresh = smscmon_refresh_volt,
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.vmin = 26000,
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.vmax = 6640000
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},
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{
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.desc = "+12V",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x24,
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.refresh = smscmon_refresh_volt,
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.vmin = 62000,
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.vmax = 15938000
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},
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{
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.desc = "Vcc",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x25,
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.refresh = smscmon_refresh_volt,
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.vmin = 17000,
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.vmax = 4383000
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},
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{
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.desc = "+1.5V",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x50,
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.refresh = smscmon_refresh_volt,
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.vmin = 8000,
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.vmax = 1992000
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},
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{
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.desc = "+1.8V",
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.type = ENVSYS_SVOLTS_DC,
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.reg = 0x51,
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.refresh = smscmon_refresh_volt,
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.vmin = 9000,
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.vmax = 2391000
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},
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{
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.desc = "Remote Temp1",
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.type = ENVSYS_STEMP,
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.reg = 0x26,
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.refresh = smscmon_refresh_temp,
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.vmin = 0,
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.vmax = 0
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},
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{
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.desc = "Ambient Temp",
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.type = ENVSYS_STEMP,
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.reg = 0x27,
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.refresh = smscmon_refresh_temp,
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.vmin = 0,
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.vmax = 0
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},
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{
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.desc = "Remote Temp2",
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.type = ENVSYS_STEMP,
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.reg = 0x52,
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.refresh = smscmon_refresh_temp,
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.vmax = 0,
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.vmin = 0
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},
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{ .desc = NULL }
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};
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static int
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smscmon_match(device_t parent, cfdata_t match, void *aux)
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{
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struct i2c_attach_args *ia = aux;
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uint8_t cmd, cid, rev;
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/* Address is hardwired to 010_110x */
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if ((ia->ia_addr & SMSCMON_ADDR_MASK) != SMSCMON_ADDR)
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return 0;
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iic_acquire_bus(ia->ia_tag, 0);
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cmd = SMSCMON_REG_COMPANY;
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if (iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP,
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ia->ia_addr, &cmd, sizeof cmd, &cid, sizeof cid, 0)) {
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iic_release_bus(ia->ia_tag, 0);
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return 0;
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}
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cmd = SMSCMON_REG_STEPPING;
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if (iic_exec(ia->ia_tag, I2C_OP_READ_WITH_STOP,
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ia->ia_addr, &cmd, sizeof cmd, &rev, sizeof rev, 0)) {
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iic_release_bus(ia->ia_tag, 0);
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return 0;
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}
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if ( cid != SMSC_CID_47M192 || rev != SMSC_REV_47M192) {
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iic_release_bus(ia->ia_tag, 0);
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return 0;
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}
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iic_release_bus(ia->ia_tag, 0);
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return 1;
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}
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static void
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smscmon_attach(device_t parent, device_t self, void *aux)
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{
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struct smscmon_sc *sc = device_private(self);
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struct i2c_attach_args *ia = aux;
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uint8_t cid, rev;
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int i;
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sc->sc_dev = self;
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sc->sc_tag = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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sc->smscmon_readreg = smscmon_readreg;
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sc->smscmon_writereg = smscmon_writereg;
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sc->smscmon_sensors = NULL;
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cid = sc->smscmon_readreg(sc, SMSCMON_REG_COMPANY);
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rev = sc->smscmon_readreg(sc, SMSCMON_REG_STEPPING);
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switch (cid) {
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case SMSC_CID_47M192:
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if (rev == SMSC_REV_47M192) {
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smscmon_sensors_setup(sc, smscmon_lpc47m192);
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aprint_normal(": LPC47M192 hardware monitor\n");
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}
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break;
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default:
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/* unknown chip */
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break;
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}
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if (sc->smscmon_sensors == NULL) {
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aprint_normal(": unknown chip: cid 0x%02x rev 0x%02x\n",
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cid, rev);
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return;
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}
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if ((sc->sc_sme = sysmon_envsys_create()) == NULL) {
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aprint_error_dev(sc->sc_dev,
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"unable to create sysmon structure\n");
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return;
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}
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for (i = 0; i < sc->numsensors; i++) {
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if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sensors[i])) {
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aprint_error_dev(sc->sc_dev,
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"unable to attach sensor\n");
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sysmon_envsys_destroy(sc->sc_sme);
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return;
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}
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}
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sc->sc_sme->sme_name = device_xname(sc->sc_dev);
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sc->sc_sme->sme_cookie = sc;
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sc->sc_sme->sme_refresh = smscmon_refresh;
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if (sysmon_envsys_register(sc->sc_sme)) {
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aprint_error_dev(sc->sc_dev,
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"unable to register with sysmon\n");
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sysmon_envsys_destroy(sc->sc_sme);
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return;
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}
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}
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static uint8_t
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smscmon_readreg(struct smscmon_sc *sc, int reg)
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{
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uint8_t cmd, data;
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iic_acquire_bus(sc->sc_tag, 0);
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cmd = reg;
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iic_smbus_read_byte(sc->sc_tag, sc->sc_addr, cmd, &data, 0);
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iic_release_bus(sc->sc_tag, 0);
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return data;
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}
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static void
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smscmon_writereg(struct smscmon_sc *sc, int reg, int val)
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{
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uint8_t cmd, data;
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iic_acquire_bus(sc->sc_tag, 0);
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cmd = reg;
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data = val;
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iic_smbus_write_byte(sc->sc_tag, sc->sc_addr, cmd, data, 0);
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iic_release_bus(sc->sc_tag, 0);
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}
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static void
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smscmon_sensors_setup(struct smscmon_sc *sc, struct smscmon_sensor *sens)
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{
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int i;
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for (i = 0; sens[i].desc; i++) {
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strlcpy(sc->sensors[i].desc, sens[i].desc,
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sizeof(sc->sensors[i].desc));
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sc->sensors[i].units = sens[i].type;
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sc->numsensors++;
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}
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sc->smscmon_sensors = sens;
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}
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static void
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smscmon_refresh_volt(struct smscmon_sc *sc, envsys_data_t *edata)
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{
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struct smscmon_sensor *sens = &sc->smscmon_sensors[edata->sensor];
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int data;
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data = (*sc->smscmon_readreg)(sc, sens->reg);
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if (data == 0xff) {
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edata->state = ENVSYS_SINVALID;
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} else {
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edata->value_cur =
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(sens->vmax - sens->vmin)/255 * data + sens->vmin;
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edata->state = ENVSYS_SVALID;
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}
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}
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static void
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smscmon_refresh_temp(struct smscmon_sc *sc, envsys_data_t *edata)
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{
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struct smscmon_sensor *sens = &sc->smscmon_sensors[edata->sensor];
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int data;
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data = (*sc->smscmon_readreg)(sc, sens->reg);
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if (data == 0xff) {
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edata->state = ENVSYS_SINVALID;
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} else {
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/* convert data(degC) to uK */
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edata->value_cur = 273150000 + 1000000 * data;
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edata->state = ENVSYS_SVALID;
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}
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}
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static void
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smscmon_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
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{
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struct smscmon_sc *sc = sme->sme_cookie;
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sc->smscmon_sensors[edata->sensor].refresh(sc, edata);
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}
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