start at a driver for the stupid ADM 1021

2 files changed, 136 insertions, 1 deletions

diff --git a/sys/dev/i2c/adm1021.c b/sys/dev/i2c/adm1021.c
new file mode 100644
index 00000000000..9e08292431f
--- /dev/null
+++ b/sys/dev/i2c/adm1021.c
@@ -0,0 +1,130 @@
+/*	$OpenBSD: adm1021.c,v 1.1 2005/12/22 23:44:12 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>
+
+/* ADM 1021 registers */
+#define ADM1021_INT_TEMP	0x00
+#define ADM1021_EXT_TEMP	0x01
+#define ADM1021_STATUS		0x02
+
+#define ADM1021_COMPANY		0xfe	/* contains 0x41 */
+#define ADM1021_STEPPING	0xff	/* contains 0x3? */
+
+/* Sensors */
+#define ADMTEMP_INT		0
+#define ADMTEMP_EXT		1
+#define ADMTEMP_NUM_SENSORS	2
+
+struct admtemp_softc {
+	struct device	sc_dev;
+	i2c_tag_t	sc_tag;
+	i2c_addr_t	sc_addr;
+
+	struct sensor	sc_sensor[ADMTEMP_NUM_SENSORS];
+};
+
+int	admtemp_match(struct device *, void *, void *);
+void	admtemp_attach(struct device *, struct device *, void *);
+void	admtemp_refresh(void *);
+
+struct cfattach admtemp_ca = {
+	sizeof(struct admtemp_softc), admtemp_match, admtemp_attach
+};
+
+struct cfdriver admtemp_cd = {
+	NULL, "admtemp", DV_DULL
+};
+
+int
+admtemp_match(struct device *parent, void *match, void *aux)
+{
+	struct i2c_attach_args *ia = aux;
+
+	if (strcmp(ia->ia_name, "adm1021") == 0) {
+		/*
+		 * should also ensure that
+		 * config & 0x80 == 0x00
+		 * status1 & 0xc0 == 0x00
+		 * status2 & 0xbc == 0x00
+		 * before accepting this to be for real
+		 */
+		return (1);
+	}
+	return (1);
+}
+
+void
+admtemp_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct admtemp_softc *sc = (struct admtemp_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 < ADMTEMP_NUM_SENSORS; i++)
+		strlcpy(sc->sc_sensor[i].device, sc->sc_dev.dv_xname,
+		    sizeof(sc->sc_sensor[i].device));
+
+	sc->sc_sensor[ADMTEMP_INT].type = SENSOR_TEMP;
+	strlcpy(sc->sc_sensor[ADMTEMP_INT].desc, "Internal",
+	    sizeof(sc->sc_sensor[ADMTEMP_INT].desc));
+
+	sc->sc_sensor[ADMTEMP_EXT].type = SENSOR_TEMP;
+	strlcpy(sc->sc_sensor[ADMTEMP_EXT].desc, "External",
+	    sizeof(sc->sc_sensor[ADMTEMP_EXT].desc));
+
+	if (sensor_task_register(sc, admtemp_refresh, 5)) {
+		printf(", unable to register update task\n");
+		return;
+	}
+
+	for (i = 0; i < ADMTEMP_NUM_SENSORS; i++)
+		SENSOR_ADD(&sc->sc_sensor[i]);
+
+	printf("\n");
+}
+
+void
+admtemp_refresh(void *arg)
+{
+	struct admtemp_softc *sc = arg;
+	u_int8_t cmd, data;
+
+	iic_acquire_bus(sc->sc_tag, 0);
+
+	cmd = ADM1021_INT_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[ADMTEMP_INT].value = 273150000 + 1000000 * data;
+
+	cmd = ADM1021_EXT_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[ADMTEMP_EXT].value = 273150000 + 1000000 * data;
+
+	iic_release_bus(sc->sc_tag, 0);
+}
diff --git a/sys/dev/i2c/files.i2c b/sys/dev/i2c/files.i2c
index 1f2d9a8c2b7..9512f252d8f 100644
--- a/sys/dev/i2c/files.i2c
+++ b/sys/dev/i2c/files.i2c
@@ -1,4 +1,4 @@
-# $OpenBSD: files.i2c,v 1.17 2005/12/22 22:57:27 deraadt Exp $
+# $OpenBSD: files.i2c,v 1.18 2005/12/22 23:44:12 deraadt Exp $
 #	$NetBSD: files.i2c,v 1.3 2003/10/20 16:24:10 briggs Exp $
 
 define	i2c {[addr = -1], [size = -1]}
@@ -40,6 +40,11 @@ device	tsl
 attach	tsl at i2c
 file	dev/i2c/tsl2560.c			tsl
 
+# ADM1021
+device	admtemp
+attach	admtemp at i2c
+file	dev/i2c/adm1021.c			admtemp
+
 # ADM1025
 device	admtm
 attach	admtm at i2c