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[src/trunk]: src/sys/dev/i2c Add driver for Texas Instruments TMP451 Temperat...
details: https://anonhg.NetBSD.org/src/rev/57ae3391171f
branches: trunk
changeset: 808293:57ae3391171f
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Tue May 12 20:54:08 2015 +0000
description:
Add driver for Texas Instruments TMP451 Temperature Sensor
diffstat:
sys/dev/i2c/files.i2c | 7 +-
sys/dev/i2c/titemp.c | 180 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 186 insertions(+), 1 deletions(-)
diffs (202 lines):
diff -r 9e81669b9262 -r 57ae3391171f sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c Tue May 12 20:42:46 2015 +0000
+++ b/sys/dev/i2c/files.i2c Tue May 12 20:54:08 2015 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.64 2015/01/11 16:54:21 jmcneill Exp $
+# $NetBSD: files.i2c,v 1.65 2015/05/12 20:54:08 jmcneill Exp $
obsolete defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -245,3 +245,8 @@
device act8846pm
attach act8846pm at iic
file dev/i2c/act8846.c act8846pm needs-flag
+
+# Texas Instruments TMP451 Temperature Sensor
+device titemp: sysmon_envsys
+attach titemp at iic
+file dev/i2c/titemp.c titemp
diff -r 9e81669b9262 -r 57ae3391171f sys/dev/i2c/titemp.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/titemp.c Tue May 12 20:54:08 2015 +0000
@@ -0,0 +1,180 @@
+/* $NetBSD: titemp.c,v 1.1 2015/05/12 20:54:08 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: titemp.c,v 1.1 2015/05/12 20:54:08 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/sysmon/sysmonvar.h>
+
+#define TITEMP_LTEMP_HI_REG 0x00
+#define TITEMP_RTEMP_HI_REG 0x01
+#define TITEMP_STATUS_REG 0x02
+#define TITEMP_CONFIG_REG 0x03
+#define TITEMP_CONVRATE_REG 0x04
+#define TITEMP_LTEMP_HLIMIT_HI_REG 0x05
+#define TITEMP_LTEMP_LLIMIT_HI_REG 0x06
+#define TITEMP_RTEMP_HLIMIT_HI_REG 0x07
+#define TITEMP_RTEMP_LLIMIT_HI_REG 0x08
+#define TITEMP_RTEMP_LO_REG 0x10
+#define TITEMP_RTEMP_OFF_HI_REG 0x11
+#define TITEMP_RTEMP_OFF_LO_REG 0x12
+#define TITEMP_RTEMP_HLIMIT_LO_REG 0x13
+#define TITEMP_RTEMP_LLIMIT_LO_REG 0x14
+#define TITEMP_LTEMP_LO_REG 0x15
+#define TITEMP_RTEMP_THERM_LIMIT_REG 0x19
+#define TITEMP_LTEMP_THERM_LIMIT_REG 0x20
+#define TITEMP_THERM_HYST_REG 0x21
+#define TITEMP_CONAL_REG 0x22
+#define TITEMP_NC_REG 0x23
+#define TITEMP_DF_REG 0x24
+#define TITEMP_MFID_REG 0xfe
+
+#define TITEMP_MFID_TMP451 0x55
+
+struct titemp_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+
+ struct sysmon_envsys *sc_sme;
+ envsys_data_t sc_sensor_ltemp;
+ envsys_data_t sc_sensor_rtemp;
+};
+
+static int titemp_match(device_t, cfdata_t, void *);
+static void titemp_attach(device_t, device_t, void *);
+
+static void titemp_sensors_refresh(struct sysmon_envsys *, envsys_data_t *);
+static int titemp_read(struct titemp_softc *, uint8_t, uint8_t *);
+
+CFATTACH_DECL_NEW(titemp, sizeof(struct titemp_softc),
+ titemp_match, titemp_attach, NULL, NULL);
+
+static int
+titemp_match(device_t parent, cfdata_t match, void *aux)
+{
+ struct i2c_attach_args *ia = aux;
+ uint8_t mfid;
+ int error;
+
+ if (iic_acquire_bus(ia->ia_tag, I2C_F_POLL) != 0)
+ return 0;
+ error = iic_smbus_read_byte(ia->ia_tag, ia->ia_addr,
+ TITEMP_MFID_REG, &mfid, I2C_F_POLL);
+ iic_release_bus(ia->ia_tag, I2C_F_POLL);
+
+ if (error || mfid != TITEMP_MFID_TMP451)
+ return 0;
+
+ return 1;
+}
+
+static void
+titemp_attach(device_t parent, device_t self, void *aux)
+{
+ struct titemp_softc *sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ aprint_naive("\n");
+ aprint_normal(": TMP451\n");
+
+ sc->sc_sme = sysmon_envsys_create();
+ sc->sc_sme->sme_name = device_xname(self);
+ sc->sc_sme->sme_cookie = sc;
+ sc->sc_sme->sme_refresh = titemp_sensors_refresh;
+
+ sc->sc_sensor_ltemp.units = ENVSYS_STEMP;
+ sc->sc_sensor_ltemp.state = ENVSYS_SINVALID;
+ snprintf(sc->sc_sensor_ltemp.desc, sizeof(sc->sc_sensor_ltemp.desc),
+ "local temperature");
+ sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_ltemp);
+
+ sc->sc_sensor_rtemp.units = ENVSYS_STEMP;
+ sc->sc_sensor_rtemp.state = ENVSYS_SINVALID;
+ snprintf(sc->sc_sensor_rtemp.desc, sizeof(sc->sc_sensor_rtemp.desc),
+ "remote temperature");
+ sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_rtemp);
+
+ sysmon_envsys_register(sc->sc_sme);
+}
+
+static void
+titemp_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
+{
+ struct titemp_softc *sc = sme->sme_cookie;
+ uint8_t reg_hi, reg_lo, temp[2];
+ int error;
+
+ if (edata == &sc->sc_sensor_ltemp) {
+ reg_hi = TITEMP_LTEMP_HI_REG;
+ reg_lo = TITEMP_LTEMP_LO_REG;
+ } else if (edata == &sc->sc_sensor_rtemp) {
+ reg_hi = TITEMP_RTEMP_HI_REG;
+ reg_lo = TITEMP_RTEMP_LO_REG;
+ } else {
+ edata->state = ENVSYS_SINVALID;
+ return;
+ }
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ if ((error = titemp_read(sc, reg_hi, &temp[0])) != 0)
+ goto done;
+ if ((error = titemp_read(sc, reg_lo, &temp[1])) != 0)
+ goto done;
+done:
+ iic_release_bus(sc->sc_i2c, 0);
+
+ if (error) {
+ edata->state = ENVSYS_SINVALID;
+ } else {
+ edata->value_cur =
+ ((uint64_t)temp[0] * 1000000) +
+ ((uint64_t)temp[1] * 62500) +
+ + 273150000;
+ edata->state = ENVSYS_SVALID;
+ }
+}
+
+static int
+titemp_read(struct titemp_softc *sc, uint8_t reg, uint8_t *val)
+{
+ return iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, reg, val, 0);
+}
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