driver for maxim ds1631, might work, might not!

2 files changed, 117 insertions, 1 deletions

diff --git a/sys/dev/i2c/ds1631.c b/sys/dev/i2c/ds1631.c
new file mode 100644
index 00000000000..9e297db80ec
--- /dev/null
+++ b/sys/dev/i2c/ds1631.c
@@ -0,0 +1,111 @@
+/*	$OpenBSD: ds1631.c,v 1.1 2005/11/16 06:26:14 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 2005 Theo de Raadt
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/sensors.h>
+
+#include <dev/i2c/i2cvar.h>
+
+/* Maxim ds 1631 registers */
+#define DS1631_TEMP		0xaa
+
+/* Sensors */
+#define MAXDS_TEMP		0
+#define MAXDS_NUM_SENSORS	1
+
+struct maxds_softc {
+	struct device	sc_dev;
+	i2c_tag_t	sc_tag;
+	i2c_addr_t	sc_addr;
+
+	struct sensor	sc_sensor[MAXDS_NUM_SENSORS];
+};
+
+int	maxds_match(struct device *, void *, void *);
+void	maxds_attach(struct device *, struct device *, void *);
+void	maxds_refresh(void *);
+
+struct cfattach maxds_ca = {
+	sizeof(struct maxds_softc), maxds_match, maxds_attach
+};
+
+struct cfdriver maxds_cd = {
+	NULL, "maxds", DV_DULL
+};
+
+int
+maxds_match(struct device *parent, void *match, void *aux)
+{
+	struct i2c_attach_args *ia = aux;
+
+	if (ia->ia_compat) {
+		if (strcmp(ia->ia_compat, "ds1631") == 0)
+			return (1);
+		return (0);
+	}
+	return (1);
+}
+
+void
+maxds_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct maxds_softc *sc = (struct maxds_softc *)self;
+	struct i2c_attach_args *ia = aux;
+	int i;
+
+	sc->sc_tag = ia->ia_tag;
+	sc->sc_addr = ia->ia_addr;
+
+	/* Initialize sensor data. */
+	for (i = 0; i < MAXDS_NUM_SENSORS; i++)
+		strlcpy(sc->sc_sensor[i].device, sc->sc_dev.dv_xname,
+		    sizeof(sc->sc_sensor[i].device));
+
+	sc->sc_sensor[MAXDS_TEMP].type = SENSOR_TEMP;
+	strlcpy(sc->sc_sensor[MAXDS_TEMP].desc, "Internal",
+	    sizeof(sc->sc_sensor[MAXDS_TEMP].desc));
+
+	if (sensor_task_register(sc, maxds_refresh, 5)) {
+		printf(", unable to register update task\n");
+		return;
+	}
+
+	for (i = 0; i < MAXDS_NUM_SENSORS; i++)
+		SENSOR_ADD(&sc->sc_sensor[i]);
+
+	printf("\n");
+}
+
+void
+maxds_refresh(void *arg)
+{
+	struct maxds_softc *sc = arg;
+	u_int8_t cmd, data[2];
+
+	iic_acquire_bus(sc->sc_tag, 0);
+
+	cmd = DS1631_TEMP;
+	if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
+	    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
+		sc->sc_sensor[MAXDS_TEMP].value = 273150000 +
+		    1000000 * data[1] + 1000000 * data[0] / 256;
+
+	iic_release_bus(sc->sc_tag, 0);
+}
diff --git a/sys/dev/i2c/files.i2c b/sys/dev/i2c/files.i2c
index 8a4f6e3a944..c39404762f3 100644
--- a/sys/dev/i2c/files.i2c
+++ b/sys/dev/i2c/files.i2c
@@ -1,4 +1,4 @@
-# $OpenBSD: files.i2c,v 1.12 2005/11/16 04:05:55 deraadt Exp $
+# $OpenBSD: files.i2c,v 1.13 2005/11/16 06:26:14 deraadt Exp $
 #	$NetBSD: files.i2c,v 1.3 2003/10/20 16:24:10 briggs Exp $
 
 define	i2c {[addr = -1], [size = -1]}
@@ -48,3 +48,8 @@ file	dev/i2c/adm1030.c			admtmp
 device	pcagpio: gpiobus
 attach	pcagpio at i2c
 file	dev/i2c/pca9554.c			pcagpio
+
+# Maxim DS1631
+device	maxds: gpiobus
+attach	maxds at i2c
+file	dev/i2c/ds1631.c			maxds