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adm1021.c revision 1.3.2.1
      1  1.3.2.1  uebayasi /*	$NetBSD: adm1021.c,v 1.3.2.1 2010/04/30 14:43:11 uebayasi Exp $ */
      2      1.1     jkunz /*	$OpenBSD: adm1021.c,v 1.27 2007/06/24 05:34:35 dlg Exp $	*/
      3      1.1     jkunz 
      4      1.1     jkunz /*
      5      1.1     jkunz  * Copyright (c) 2005 Theo de Raadt
      6      1.1     jkunz  *
      7      1.1     jkunz  * Permission to use, copy, modify, and distribute this software for any
      8      1.1     jkunz  * purpose with or without fee is hereby granted, provided that the above
      9      1.1     jkunz  * copyright notice and this permission notice appear in all copies.
     10      1.1     jkunz  *
     11      1.1     jkunz  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12      1.1     jkunz  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13      1.1     jkunz  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14      1.1     jkunz  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15      1.1     jkunz  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16      1.1     jkunz  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17      1.1     jkunz  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18      1.1     jkunz  */
     19      1.1     jkunz 
     20      1.1     jkunz #include <sys/cdefs.h>
     21  1.3.2.1  uebayasi __KERNEL_RCSID(0, "$NetBSD: adm1021.c,v 1.3.2.1 2010/04/30 14:43:11 uebayasi Exp $");
     22      1.1     jkunz 
     23      1.1     jkunz #include <sys/param.h>
     24      1.1     jkunz #include <sys/systm.h>
     25      1.1     jkunz #include <sys/device.h>
     26      1.1     jkunz #include <dev/sysmon/sysmonvar.h>
     27      1.1     jkunz 
     28      1.1     jkunz #include <dev/i2c/i2cvar.h>
     29      1.1     jkunz 
     30      1.1     jkunz 
     31      1.1     jkunz /* ADM 1021 registers */
     32      1.1     jkunz #define ADM1021_INT_TEMP	0x00
     33      1.1     jkunz #define ADM1021_EXT_TEMP	0x01
     34      1.1     jkunz #define ADM1021_STATUS		0x02
     35      1.1     jkunz #define ADM1021_STATUS_INVAL	0x7f
     36      1.1     jkunz #define ADM1021_STATUS_NOEXT	0x40
     37      1.1     jkunz #define ADM1021_CONFIG_READ	0x03
     38      1.1     jkunz #define ADM1021_CONFIG_WRITE	0x09
     39      1.1     jkunz #define ADM1021_CONFIG_RUN	0x40
     40      1.1     jkunz #define ADM1021_COMPANY		0xfe	/* contains 0x41 */
     41      1.3   hubertf #define ADM1021_DIE_REVISION	0xff
     42      1.1     jkunz 
     43      1.1     jkunz /* Sensors */
     44      1.1     jkunz #define ADMTEMP_INT		0
     45      1.1     jkunz #define ADMTEMP_EXT		1
     46      1.1     jkunz #define ADMTEMP_NUM_SENSORS	2
     47      1.1     jkunz 
     48      1.1     jkunz struct admtemp_softc {
     49      1.1     jkunz 	struct device	sc_dev;
     50      1.1     jkunz 	i2c_tag_t	sc_tag;
     51      1.1     jkunz 	i2c_addr_t	sc_addr;
     52      1.1     jkunz 
     53      1.1     jkunz 	int		sc_noexternal;
     54      1.1     jkunz 	struct sysmon_envsys *sc_sme;
     55      1.1     jkunz 	envsys_data_t sc_sensor[ADMTEMP_NUM_SENSORS];
     56      1.1     jkunz };
     57      1.1     jkunz 
     58      1.2    cegger int	admtemp_match(device_t, cfdata_t, void *);
     59      1.2    cegger void	admtemp_attach(device_t, device_t, void *);
     60      1.1     jkunz void	admtemp_refresh(struct sysmon_envsys *, envsys_data_t *);
     61      1.1     jkunz 
     62      1.1     jkunz CFATTACH_DECL_NEW(admtemp, sizeof(struct admtemp_softc),
     63      1.1     jkunz 	admtemp_match, admtemp_attach, NULL, NULL);
     64      1.1     jkunz 
     65  1.3.2.1  uebayasi static const char * admtemp_compats[] = {
     66  1.3.2.1  uebayasi 	"i2c-max1617",
     67  1.3.2.1  uebayasi 	NULL
     68  1.3.2.1  uebayasi };
     69      1.1     jkunz 
     70      1.1     jkunz int
     71      1.2    cegger admtemp_match(device_t parent, cfdata_t match, void *aux)
     72      1.1     jkunz {
     73      1.1     jkunz 	struct i2c_attach_args *ia = aux;
     74      1.1     jkunz 
     75  1.3.2.1  uebayasi 	if (ia->ia_name == NULL) {
     76  1.3.2.1  uebayasi 		/*
     77  1.3.2.1  uebayasi 		 * Indirect config - not much we can do!
     78  1.3.2.1  uebayasi 		 * Check typical addresses.
     79  1.3.2.1  uebayasi 		 */
     80  1.3.2.1  uebayasi 		if (((ia->ia_addr >= 0x18) && (ia->ia_addr <= 0x1a)) ||
     81  1.3.2.1  uebayasi 		    ((ia->ia_addr >= 0x29) && (ia->ia_addr <= 0x2b)) ||
     82  1.3.2.1  uebayasi 		    ((ia->ia_addr >= 0x4c) && (ia->ia_addr <= 0x4e)))
     83  1.3.2.1  uebayasi 			return (1);
     84  1.3.2.1  uebayasi 	} else {
     85  1.3.2.1  uebayasi 		/*
     86  1.3.2.1  uebayasi 		 * Direct config - match via the list of compatible
     87  1.3.2.1  uebayasi 		 * hardware.
     88  1.3.2.1  uebayasi 		 */
     89  1.3.2.1  uebayasi 		if (iic_compat_match(ia, admtemp_compats))
     90  1.3.2.1  uebayasi 			return 1;
     91  1.3.2.1  uebayasi 	}
     92      1.1     jkunz 
     93  1.3.2.1  uebayasi 	return 0;
     94      1.1     jkunz }
     95      1.1     jkunz 
     96      1.1     jkunz 
     97      1.1     jkunz void
     98      1.2    cegger admtemp_attach(device_t parent, device_t self, void *aux)
     99      1.1     jkunz {
    100      1.1     jkunz 	struct admtemp_softc *sc = device_private(self);
    101      1.1     jkunz 	struct i2c_attach_args *ia = aux;
    102      1.1     jkunz 	u_int8_t cmd, data, stat;
    103      1.1     jkunz 
    104      1.1     jkunz 	sc->sc_tag = ia->ia_tag;
    105      1.1     jkunz 	sc->sc_addr = ia->ia_addr;
    106      1.1     jkunz 
    107      1.1     jkunz 	aprint_normal(": ADM1021 or compatible environmental sensor\n");
    108  1.3.2.1  uebayasi 	aprint_naive(": Environmental sensor\n");
    109      1.1     jkunz 
    110      1.1     jkunz 	iic_acquire_bus(sc->sc_tag, 0);
    111      1.1     jkunz 	cmd = ADM1021_CONFIG_READ;
    112      1.1     jkunz 	if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
    113      1.1     jkunz 	    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
    114      1.1     jkunz 		iic_release_bus(sc->sc_tag, 0);
    115      1.1     jkunz 		aprint_error_dev(&sc->sc_dev, "cannot get control register\n");
    116      1.1     jkunz 		return;
    117      1.1     jkunz 	}
    118      1.1     jkunz 	if (data & ADM1021_CONFIG_RUN) {
    119      1.1     jkunz 		cmd = ADM1021_STATUS;
    120      1.1     jkunz 		if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
    121      1.1     jkunz 		    sc->sc_addr, &cmd, sizeof cmd, &stat, sizeof stat, 0)) {
    122      1.1     jkunz 			iic_release_bus(sc->sc_tag, 0);
    123      1.1     jkunz 			aprint_error_dev(&sc->sc_dev,
    124      1.1     jkunz 			    "cannot read status register\n");
    125      1.1     jkunz 			return;
    126      1.1     jkunz 		}
    127      1.1     jkunz 		if ((stat & ADM1021_STATUS_INVAL) == ADM1021_STATUS_INVAL) {
    128      1.1     jkunz 			if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
    129      1.1     jkunz 			    sc->sc_addr, &cmd, sizeof cmd, &stat, sizeof stat,
    130      1.1     jkunz 			    0)) {
    131      1.1     jkunz 				iic_release_bus(sc->sc_tag, 0);
    132      1.1     jkunz 				aprint_error_dev(&sc->sc_dev,
    133      1.1     jkunz 				    "cannot read status register\n");
    134      1.1     jkunz 				return;
    135      1.1     jkunz 			}
    136      1.1     jkunz 		}
    137      1.1     jkunz 
    138      1.1     jkunz 		/* means external is dead */
    139      1.1     jkunz 		if ((stat & ADM1021_STATUS_INVAL) != ADM1021_STATUS_INVAL &&
    140      1.1     jkunz 		    (stat & ADM1021_STATUS_NOEXT))
    141      1.1     jkunz 			sc->sc_noexternal = 1;
    142      1.1     jkunz 
    143      1.1     jkunz 		data &= ~ADM1021_CONFIG_RUN;
    144      1.1     jkunz 		cmd = ADM1021_CONFIG_WRITE;
    145      1.1     jkunz 		if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
    146      1.1     jkunz 		    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
    147      1.1     jkunz 			iic_release_bus(sc->sc_tag, 0);
    148      1.1     jkunz 			aprint_error_dev(&sc->sc_dev,
    149      1.1     jkunz 			    "cannot set control register\n");
    150      1.1     jkunz 			return;
    151      1.1     jkunz 		}
    152      1.1     jkunz 	}
    153      1.1     jkunz 	iic_release_bus(sc->sc_tag, 0);
    154      1.1     jkunz 
    155      1.1     jkunz 	/* Initialize sensor data. */
    156      1.1     jkunz 	sc->sc_sensor[ADMTEMP_INT].units = ENVSYS_STEMP;
    157      1.1     jkunz 	sc->sc_sensor[ADMTEMP_EXT].units = ENVSYS_STEMP;
    158      1.1     jkunz 	strlcpy(sc->sc_sensor[ADMTEMP_INT].desc, "internal",sizeof("internal"));
    159      1.1     jkunz 	strlcpy(sc->sc_sensor[ADMTEMP_EXT].desc, "external",sizeof("external"));
    160      1.1     jkunz 	sc->sc_sme = sysmon_envsys_create();
    161      1.1     jkunz 	if (sysmon_envsys_sensor_attach(
    162      1.1     jkunz 	    sc->sc_sme, &sc->sc_sensor[ADMTEMP_INT])) {
    163      1.1     jkunz 		sysmon_envsys_destroy(sc->sc_sme);
    164      1.1     jkunz 		aprint_error_dev(&sc->sc_dev,
    165      1.1     jkunz 		    "unable to attach internal at sysmon\n");
    166      1.1     jkunz 		return;
    167      1.1     jkunz 	}
    168      1.1     jkunz 	if (sc->sc_noexternal == 0 &&
    169      1.1     jkunz 	    sysmon_envsys_sensor_attach(
    170      1.1     jkunz 	    sc->sc_sme, &sc->sc_sensor[ADMTEMP_EXT])) {
    171      1.1     jkunz 		sysmon_envsys_destroy(sc->sc_sme);
    172      1.1     jkunz 		aprint_error_dev(&sc->sc_dev,
    173      1.1     jkunz 		    "unable to attach external at sysmon\n");
    174      1.1     jkunz 		return;
    175      1.1     jkunz 	}
    176      1.1     jkunz         sc->sc_sme->sme_name = device_xname(self);
    177      1.1     jkunz         sc->sc_sme->sme_cookie = sc;
    178      1.1     jkunz         sc->sc_sme->sme_refresh = admtemp_refresh;
    179      1.1     jkunz 	if (sysmon_envsys_register(sc->sc_sme)) {
    180      1.1     jkunz 		aprint_error_dev(&sc->sc_dev,
    181      1.1     jkunz 		    "unable to register with sysmon\n");
    182      1.1     jkunz 		sysmon_envsys_destroy(sc->sc_sme);
    183      1.1     jkunz 		return;
    184      1.1     jkunz 	}
    185      1.1     jkunz }
    186      1.1     jkunz 
    187      1.1     jkunz 
    188      1.1     jkunz void
    189      1.1     jkunz admtemp_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
    190      1.1     jkunz {
    191      1.1     jkunz 	struct admtemp_softc *sc = sme->sme_cookie;
    192      1.1     jkunz 	u_int8_t cmd;
    193      1.1     jkunz 	int8_t sdata;
    194      1.1     jkunz 
    195      1.1     jkunz 	iic_acquire_bus(sc->sc_tag, 0);
    196      1.1     jkunz 
    197      1.1     jkunz 	if (edata->sensor == ADMTEMP_INT)
    198      1.1     jkunz 		cmd = ADM1021_INT_TEMP;
    199      1.1     jkunz 	else
    200      1.1     jkunz 		cmd = ADM1021_EXT_TEMP;
    201      1.1     jkunz 	if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
    202      1.1     jkunz 	    &cmd, sizeof cmd, &sdata,  sizeof sdata, 0) == 0) {
    203      1.1     jkunz 		if (sdata == ADM1021_STATUS_INVAL) {
    204      1.1     jkunz 			edata->state = ENVSYS_SINVALID;
    205      1.1     jkunz 		} else {
    206      1.1     jkunz 			edata->value_cur = 273150000 + 1000000 * sdata;
    207      1.1     jkunz 			edata->state = ENVSYS_SVALID;
    208      1.1     jkunz 		}
    209      1.1     jkunz 	}
    210      1.1     jkunz 
    211      1.1     jkunz 	iic_release_bus(sc->sc_tag, 0);
    212      1.1     jkunz }
    213