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titemp.c revision 1.3.16.3
      1  1.3.16.3  pgoyette /* $NetBSD: titemp.c,v 1.3.16.3 2018/07/28 04:37:44 pgoyette Exp $ */
      2       1.1  jmcneill 
      3       1.1  jmcneill /*-
      4       1.1  jmcneill  * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca>
      5       1.1  jmcneill  * All rights reserved.
      6       1.1  jmcneill  *
      7       1.1  jmcneill  * Redistribution and use in source and binary forms, with or without
      8       1.1  jmcneill  * modification, are permitted provided that the following conditions
      9       1.1  jmcneill  * are met:
     10       1.1  jmcneill  * 1. Redistributions of source code must retain the above copyright
     11       1.1  jmcneill  *    notice, this list of conditions and the following disclaimer.
     12       1.1  jmcneill  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1  jmcneill  *    notice, this list of conditions and the following disclaimer in the
     14       1.1  jmcneill  *    documentation and/or other materials provided with the distribution.
     15       1.1  jmcneill  *
     16       1.1  jmcneill  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17       1.1  jmcneill  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18       1.1  jmcneill  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19       1.1  jmcneill  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20       1.1  jmcneill  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21       1.1  jmcneill  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22       1.1  jmcneill  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23       1.1  jmcneill  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24       1.1  jmcneill  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25       1.1  jmcneill  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26       1.1  jmcneill  * POSSIBILITY OF SUCH DAMAGE.
     27       1.1  jmcneill  */
     28       1.1  jmcneill 
     29       1.1  jmcneill #include <sys/cdefs.h>
     30  1.3.16.3  pgoyette __KERNEL_RCSID(0, "$NetBSD: titemp.c,v 1.3.16.3 2018/07/28 04:37:44 pgoyette Exp $");
     31       1.1  jmcneill 
     32       1.1  jmcneill #include <sys/param.h>
     33       1.1  jmcneill #include <sys/systm.h>
     34       1.1  jmcneill #include <sys/device.h>
     35       1.1  jmcneill #include <sys/conf.h>
     36       1.1  jmcneill #include <sys/bus.h>
     37       1.1  jmcneill #include <sys/kmem.h>
     38       1.1  jmcneill 
     39       1.1  jmcneill #include <dev/i2c/i2cvar.h>
     40       1.1  jmcneill 
     41       1.1  jmcneill #include <dev/sysmon/sysmonvar.h>
     42       1.1  jmcneill 
     43       1.1  jmcneill #define TITEMP_LTEMP_HI_REG		0x00
     44       1.1  jmcneill #define TITEMP_RTEMP_HI_REG		0x01
     45       1.1  jmcneill #define TITEMP_STATUS_REG		0x02
     46       1.1  jmcneill #define TITEMP_CONFIG_REG		0x03
     47       1.1  jmcneill #define TITEMP_CONVRATE_REG		0x04
     48       1.1  jmcneill #define TITEMP_LTEMP_HLIMIT_HI_REG	0x05
     49       1.1  jmcneill #define TITEMP_LTEMP_LLIMIT_HI_REG	0x06
     50       1.1  jmcneill #define TITEMP_RTEMP_HLIMIT_HI_REG	0x07
     51       1.1  jmcneill #define TITEMP_RTEMP_LLIMIT_HI_REG	0x08
     52       1.1  jmcneill #define TITEMP_RTEMP_LO_REG		0x10
     53       1.1  jmcneill #define TITEMP_RTEMP_OFF_HI_REG		0x11
     54       1.1  jmcneill #define TITEMP_RTEMP_OFF_LO_REG		0x12
     55       1.1  jmcneill #define TITEMP_RTEMP_HLIMIT_LO_REG	0x13
     56       1.1  jmcneill #define TITEMP_RTEMP_LLIMIT_LO_REG	0x14
     57       1.1  jmcneill #define TITEMP_LTEMP_LO_REG		0x15
     58       1.1  jmcneill #define TITEMP_RTEMP_THERM_LIMIT_REG	0x19
     59       1.1  jmcneill #define TITEMP_LTEMP_THERM_LIMIT_REG	0x20
     60       1.1  jmcneill #define TITEMP_THERM_HYST_REG		0x21
     61       1.1  jmcneill #define TITEMP_CONAL_REG		0x22
     62       1.1  jmcneill #define TITEMP_NC_REG			0x23
     63       1.1  jmcneill #define TITEMP_DF_REG			0x24
     64       1.1  jmcneill #define TITEMP_MFID_REG			0xfe
     65       1.1  jmcneill 
     66       1.1  jmcneill #define TITEMP_MFID_TMP451		0x55
     67       1.1  jmcneill 
     68       1.1  jmcneill struct titemp_softc {
     69       1.1  jmcneill 	device_t	sc_dev;
     70       1.1  jmcneill 	i2c_tag_t	sc_i2c;
     71       1.1  jmcneill 	i2c_addr_t	sc_addr;
     72       1.1  jmcneill 
     73       1.1  jmcneill 	struct sysmon_envsys *sc_sme;
     74       1.1  jmcneill 	envsys_data_t	sc_sensor_ltemp;
     75       1.1  jmcneill 	envsys_data_t	sc_sensor_rtemp;
     76       1.1  jmcneill };
     77       1.1  jmcneill 
     78       1.1  jmcneill static int	titemp_match(device_t, cfdata_t, void *);
     79       1.1  jmcneill static void	titemp_attach(device_t, device_t, void *);
     80       1.1  jmcneill 
     81       1.1  jmcneill static void	titemp_sensors_refresh(struct sysmon_envsys *, envsys_data_t *);
     82       1.1  jmcneill static int	titemp_read(struct titemp_softc *, uint8_t, uint8_t *);
     83       1.1  jmcneill 
     84       1.1  jmcneill CFATTACH_DECL_NEW(titemp, sizeof(struct titemp_softc),
     85       1.1  jmcneill     titemp_match, titemp_attach, NULL, NULL);
     86       1.1  jmcneill 
     87  1.3.16.3  pgoyette static const struct device_compatible_entry compat_data[] = {
     88  1.3.16.3  pgoyette 	{ "ti,tmp451",			0 },
     89  1.3.16.3  pgoyette 	{ NULL,				0 }
     90  1.3.16.2  pgoyette };
     91  1.3.16.2  pgoyette 
     92       1.1  jmcneill static int
     93       1.1  jmcneill titemp_match(device_t parent, cfdata_t match, void *aux)
     94       1.1  jmcneill {
     95       1.1  jmcneill 	struct i2c_attach_args *ia = aux;
     96       1.1  jmcneill 	uint8_t mfid;
     97  1.3.16.2  pgoyette 	int error, match_result;
     98       1.1  jmcneill 
     99  1.3.16.3  pgoyette 	if (iic_use_direct_match(ia, match, compat_data, &match_result))
    100  1.3.16.2  pgoyette 		return match_result;
    101  1.3.16.2  pgoyette 
    102  1.3.16.2  pgoyette 	if (ia->ia_addr != 0x4c)
    103  1.3.16.2  pgoyette 		return 0;
    104  1.3.16.2  pgoyette 
    105  1.3.16.2  pgoyette 	if (iic_acquire_bus(ia->ia_tag, I2C_F_POLL) != 0)
    106  1.3.16.2  pgoyette 		return 0;
    107  1.3.16.2  pgoyette 	error = iic_smbus_read_byte(ia->ia_tag, ia->ia_addr,
    108  1.3.16.2  pgoyette 	    TITEMP_MFID_REG, &mfid, I2C_F_POLL);
    109  1.3.16.2  pgoyette 	iic_release_bus(ia->ia_tag, I2C_F_POLL);
    110       1.1  jmcneill 
    111  1.3.16.2  pgoyette 	if (error || mfid != TITEMP_MFID_TMP451)
    112  1.3.16.2  pgoyette 		return 0;
    113       1.1  jmcneill 
    114  1.3.16.2  pgoyette 	return I2C_MATCH_ADDRESS_AND_PROBE;
    115       1.1  jmcneill }
    116       1.1  jmcneill 
    117       1.1  jmcneill static void
    118       1.1  jmcneill titemp_attach(device_t parent, device_t self, void *aux)
    119       1.1  jmcneill {
    120       1.1  jmcneill 	struct titemp_softc *sc = device_private(self);
    121       1.1  jmcneill 	struct i2c_attach_args *ia = aux;
    122       1.1  jmcneill 
    123       1.1  jmcneill 	sc->sc_dev = self;
    124       1.1  jmcneill 	sc->sc_i2c = ia->ia_tag;
    125       1.1  jmcneill 	sc->sc_addr = ia->ia_addr;
    126       1.1  jmcneill 
    127       1.1  jmcneill 	aprint_naive("\n");
    128       1.1  jmcneill 	aprint_normal(": TMP451\n");
    129       1.1  jmcneill 
    130       1.1  jmcneill 	sc->sc_sme = sysmon_envsys_create();
    131       1.1  jmcneill 	sc->sc_sme->sme_name = device_xname(self);
    132       1.1  jmcneill 	sc->sc_sme->sme_cookie = sc;
    133       1.1  jmcneill 	sc->sc_sme->sme_refresh = titemp_sensors_refresh;
    134       1.1  jmcneill 
    135       1.1  jmcneill 	sc->sc_sensor_ltemp.units = ENVSYS_STEMP;
    136       1.1  jmcneill 	sc->sc_sensor_ltemp.state = ENVSYS_SINVALID;
    137       1.1  jmcneill 	snprintf(sc->sc_sensor_ltemp.desc, sizeof(sc->sc_sensor_ltemp.desc),
    138       1.1  jmcneill 	    "local temperature");
    139       1.1  jmcneill 	sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_ltemp);
    140       1.1  jmcneill 
    141       1.1  jmcneill 	sc->sc_sensor_rtemp.units = ENVSYS_STEMP;
    142       1.1  jmcneill 	sc->sc_sensor_rtemp.state = ENVSYS_SINVALID;
    143       1.1  jmcneill 	snprintf(sc->sc_sensor_rtemp.desc, sizeof(sc->sc_sensor_rtemp.desc),
    144       1.1  jmcneill 	    "remote temperature");
    145       1.1  jmcneill 	sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_rtemp);
    146       1.1  jmcneill 
    147       1.1  jmcneill 	sysmon_envsys_register(sc->sc_sme);
    148       1.1  jmcneill }
    149       1.1  jmcneill 
    150       1.1  jmcneill static void
    151       1.1  jmcneill titemp_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
    152       1.1  jmcneill {
    153       1.1  jmcneill 	struct titemp_softc *sc = sme->sme_cookie;
    154       1.1  jmcneill 	uint8_t reg_hi, reg_lo, temp[2];
    155       1.1  jmcneill 	int error;
    156       1.1  jmcneill 
    157       1.1  jmcneill 	if (edata == &sc->sc_sensor_ltemp) {
    158       1.1  jmcneill 		reg_hi = TITEMP_LTEMP_HI_REG;
    159       1.1  jmcneill 		reg_lo = TITEMP_LTEMP_LO_REG;
    160       1.1  jmcneill 	} else if (edata == &sc->sc_sensor_rtemp) {
    161       1.1  jmcneill 		reg_hi = TITEMP_RTEMP_HI_REG;
    162       1.1  jmcneill 		reg_lo = TITEMP_RTEMP_LO_REG;
    163       1.1  jmcneill 	} else {
    164       1.1  jmcneill 		edata->state = ENVSYS_SINVALID;
    165       1.1  jmcneill 		return;
    166       1.1  jmcneill 	}
    167       1.1  jmcneill 
    168       1.1  jmcneill 	iic_acquire_bus(sc->sc_i2c, 0);
    169       1.1  jmcneill 	if ((error = titemp_read(sc, reg_hi, &temp[0])) != 0)
    170       1.1  jmcneill 		goto done;
    171       1.1  jmcneill 	if ((error = titemp_read(sc, reg_lo, &temp[1])) != 0)
    172       1.1  jmcneill 		goto done;
    173       1.1  jmcneill done:
    174       1.1  jmcneill 	iic_release_bus(sc->sc_i2c, 0);
    175       1.1  jmcneill 
    176       1.1  jmcneill 	if (error) {
    177       1.1  jmcneill 		edata->state = ENVSYS_SINVALID;
    178       1.1  jmcneill 	} else {
    179       1.1  jmcneill 		edata->value_cur =
    180       1.1  jmcneill 		    ((uint64_t)temp[0] * 1000000) +
    181       1.3  jakllsch 		    ((uint64_t)(temp[1]>>4) * 62500) +
    182       1.1  jmcneill 		    + 273150000;
    183       1.1  jmcneill 		edata->state = ENVSYS_SVALID;
    184       1.1  jmcneill 	}
    185       1.1  jmcneill }
    186       1.1  jmcneill 
    187       1.1  jmcneill static int
    188       1.1  jmcneill titemp_read(struct titemp_softc *sc, uint8_t reg, uint8_t *val)
    189       1.1  jmcneill {
    190       1.1  jmcneill 	return iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, reg, val, 0);
    191       1.1  jmcneill }
    192