simple driver for the Analog Devices AD7417/7418 (does not cope right

with 7416 without ADC yet)

2 files changed, 186 insertions, 2 deletions

diff --git a/sys/dev/i2c/ad741x.c b/sys/dev/i2c/ad741x.c
new file mode 100644
index 00000000000..2eeb8d9b379
--- /dev/null
+++ b/sys/dev/i2c/ad741x.c
@@ -0,0 +1,179 @@
+/*	$OpenBSD: ad741x.c,v 1.1 2005/11/15 18:28:05 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>
+
+/* AD741x registers */
+#define AD741X_TEMP	0x00
+#define AD741X_CONFIG	0x01
+#define AD741X_THYST	0x02
+#define AD741X_TOTI	0x03
+#define AD741X_ADC	0x04
+#define AD741X_CONFIG2	0x05
+
+#define AD741X_CONFMASK	0xe0
+
+/* Sensors */
+#define ADC_TEMP		0
+#define ADC_ADC0		1
+#define ADC_ADC1		2
+#define ADC_ADC2		3	
+#define ADC_ADC3		4
+#define ADC_NUM_SENSORS		5
+
+struct adc_softc {
+	struct device sc_dev;
+	i2c_tag_t sc_tag;
+	i2c_addr_t sc_addr;
+
+	struct sensor sc_sensor[ADC_NUM_SENSORS];
+};
+
+int	adc_match(struct device *, void *, void *);
+void	adc_attach(struct device *, struct device *, void *);
+int	adc_check(struct i2c_attach_args *, u_int8_t *, u_int8_t *);
+void	adc_refresh(void *);
+
+struct cfattach adc_ca = {
+	sizeof(struct adc_softc), adc_match, adc_attach
+};
+
+struct cfdriver adc_cd = {
+	NULL, "adc", DV_DULL
+};
+
+int
+adc_match(struct device *parent, void *match, void *aux)
+{
+	struct i2c_attach_args *ia = aux;
+
+	if (ia->ia_compat) {
+		if (strcmp(ia->ia_compat, "ad7417") == 0)
+			return (1);
+		return (0);
+	}
+	return (1);
+}
+
+void
+adc_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct adc_softc *sc = (struct adc_softc *)self;
+	struct i2c_attach_args *ia = aux;
+	u_int8_t cmd, data;
+	int i;
+
+	sc->sc_tag = ia->ia_tag;
+	sc->sc_addr = ia->ia_addr;
+
+	cmd = AD741X_CONFIG;
+	data = 0;
+	if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
+	    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
+		printf(", config reset failed\n");
+		return;
+	}
+
+	cmd = AD741X_CONFIG2;
+	data = 0;
+	if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
+	    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
+		printf(", config2 reset failed\n");
+		return;
+	}
+
+	/* Initialize sensor data. */
+	for (i = 0; i < ADC_NUM_SENSORS; i++)
+		strlcpy(sc->sc_sensor[i].device, sc->sc_dev.dv_xname,
+		    sizeof(sc->sc_sensor[i].device));
+
+	sc->sc_sensor[ADC_TEMP].type = SENSOR_TEMP;
+	strlcpy(sc->sc_sensor[ADC_TEMP].desc, "Internal",
+	    sizeof(sc->sc_sensor[ADC_TEMP].desc));
+
+	sc->sc_sensor[ADC_ADC0].type = SENSOR_INTEGER;
+	strlcpy(sc->sc_sensor[ADC_ADC0].desc, "adc0",
+	    sizeof(sc->sc_sensor[ADC_ADC0].desc));
+	sc->sc_sensor[ADC_ADC1].type = SENSOR_INTEGER;
+	strlcpy(sc->sc_sensor[ADC_ADC1].desc, "adc1",
+	    sizeof(sc->sc_sensor[ADC_ADC1].desc));
+	sc->sc_sensor[ADC_ADC2].type = SENSOR_INTEGER;
+	strlcpy(sc->sc_sensor[ADC_ADC2].desc, "adc2",
+	    sizeof(sc->sc_sensor[ADC_ADC2].desc));
+	sc->sc_sensor[ADC_ADC3].type = SENSOR_INTEGER;
+	strlcpy(sc->sc_sensor[ADC_ADC3].desc, "adc3",
+	    sizeof(sc->sc_sensor[ADC_ADC3].desc));
+
+	if (sensor_task_register(sc, adc_refresh, 5)) {
+		printf(", unable to register update task\n");
+		return;
+	}
+
+	for (i = 0; i < ADC_NUM_SENSORS; i++)
+		SENSOR_ADD(&sc->sc_sensor[i]);
+
+	printf("\n");
+}
+
+void	adc_readport(struct adc_softc *, u_int8_t, u_int8_t, int);
+
+void
+adc_refresh(void *arg)
+{
+	struct adc_softc *sc = arg;
+	u_int8_t cmd, data[2], reg;
+	int i;
+
+	iic_acquire_bus(sc->sc_tag, 0);
+
+	cmd = AD741X_CONFIG;
+	if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
+	    sc->sc_addr, &cmd, sizeof cmd, &reg, sizeof reg, 0))
+		goto fail;
+	reg = (reg & AD741X_CONFMASK) | (0 << 5);
+	if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
+	    sc->sc_addr, &cmd, sizeof cmd, &reg, sizeof reg, 0))
+		goto fail;
+	cmd = AD741X_TEMP;
+	if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
+	    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0))
+		goto fail;
+	sc->sc_sensor[ADC_TEMP].value = 273150000 +
+	    ((data[0] << 8 | data[1]) >> 6) * 250000;
+
+	for (i = 0; i < 4; i++) {
+		reg = (reg & AD741X_CONFMASK) | (i << 5);
+		if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
+		    sc->sc_addr, &cmd, sizeof cmd, &reg, sizeof reg, 0))
+			goto fail;
+		cmd = AD741X_ADC;
+		if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
+		    sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0))
+			goto fail;
+		sc->sc_sensor[ADC_ADC0 + i].value =
+		    (data[0] << 8 | data[1]) >> 6;
+	}
+
+fail:
+	iic_release_bus(sc->sc_tag, 0);
+}
diff --git a/sys/dev/i2c/files.i2c b/sys/dev/i2c/files.i2c
index 43a78313280..37651084596 100644
--- a/sys/dev/i2c/files.i2c
+++ b/sys/dev/i2c/files.i2c
@@ -1,4 +1,4 @@
-# $OpenBSD: files.i2c,v 1.8 2005/11/15 16:24:49 deraadt Exp $
+# $OpenBSD: files.i2c,v 1.9 2005/11/15 18:28:05 deraadt Exp $
 #	$NetBSD: files.i2c,v 1.3 2003/10/20 16:24:10 briggs Exp $
 
 define	i2c {[addr = -1], [size = -1]}
@@ -24,7 +24,12 @@ device	lmenv
 attach	lmenv at i2c
 file	dev/i2c/lm87.c				lmenv
 
-# Maxim Remote/Local Temperature sensor
+# Maxim MAX6690 Remote/Local Temperature sensor
 device	maxtmp
 attach	maxtmp at i2c
 file	dev/i2c/maxim6690.c			maxtmp
+
+# Analog Devices AD741x Temperature sensor + 4-channel ADC
+device	adc
+attach	adc at i2c
+file	dev/i2c/ad741x.c			adc