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[src/trunk]: src/sys/dev/i2c a very preliminary driver for the acclerometer f...
details: https://anonhg.NetBSD.org/src/rev/32b035688045
branches: trunk
changeset: 931226:32b035688045
user: macallan <macallan%NetBSD.org@localhost>
date: Fri Apr 24 12:38:31 2020 +0000
description:
a very preliminary driver for the acclerometer found in later *Books
register definitions from OpenBSD
diffstat:
sys/dev/i2c/asms.c | 200 ++++++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/i2c/files.i2c | 7 +-
2 files changed, 206 insertions(+), 1 deletions(-)
diffs (225 lines):
diff -r 833f76356cb6 -r 32b035688045 sys/dev/i2c/asms.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/asms.c Fri Apr 24 12:38:31 2020 +0000
@@ -0,0 +1,200 @@
+/* $NetBSD: asms.c,v 1.1 2020/04/24 12:38:31 macallan Exp $ */
+
+/*-
+ * Copyright (c) 2020 Michael Lorenz
+ * 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: asms.c,v 1.1 2020/04/24 12:38:31 macallan Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/sysmon/sysmonvar.h>
+
+struct asms_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+
+ struct sysmon_envsys *sc_sme;
+ envsys_data_t sc_sensors[3];
+};
+
+static int asms_match(device_t, cfdata_t, void *);
+static void asms_attach(device_t, device_t, void *);
+
+static void asms_sensors_refresh(struct sysmon_envsys *, envsys_data_t *);
+static void asms_init(struct asms_softc *);
+
+CFATTACH_DECL_NEW(asms, sizeof(struct asms_softc),
+ asms_match, asms_attach, NULL, NULL);
+
+static const struct device_compatible_entry compat_data[] = {
+ { "accelerometer", 0 },
+ { "AAPL,accelerometer_1", 0 },
+ { NULL, 0 }
+};
+
+/* ASMS Registers, from OpenBSD */
+#define ASMS_REG_COMMAND 0x00
+#define ASMS_REG_STATUS 0x01
+#define ASMS_REG_RCONTROL1 0x02
+#define ASMS_REG_RCONTROL2 0x03
+#define ASMS_REG_RCONTROL3 0x04
+#define ASMS_REG_RDATA1 0x05
+#define ASMS_REG_RDATA2 0x06
+#define ASMS_REG_DATA_X 0x20
+#define ASMS_REG_DATA_Y 0x21
+#define ASMS_REG_DATA_Z 0x22
+#define ASMS_REG_SENS_LOW 0x26 /* init with 0x15 */
+#define ASMS_REG_SENS_HIGH 0x27 /* init with 0x60 */
+#define ASMS_REG_CONTROL_X 0x28 /* init with 0x08 */
+#define ASMS_REG_CONTROL_Y 0x29 /* init with 0x0f */
+#define ASMS_REG_CONTROL_Z 0x2a /* init with 0x4f */
+#define ASMS_REG_UNKNOWN1 0x2b /* init with 0x14 */
+#define ASMS_REG_VENDOR 0x2e
+#define ASMS_CMD_READ_VER 0x01
+#define ASMS_CMD_READ_MEM 0x02
+#define ASMS_CMD_RESET 0x07
+#define ASMS_CMD_START 0x08
+
+static int
+asms_match(device_t parent, cfdata_t match, void *aux)
+{
+ struct i2c_attach_args *ia = aux;
+ int match_result;
+
+ if (iic_use_direct_match(ia, match, compat_data, &match_result))
+ return match_result;
+
+ if ((ia->ia_addr & 0xf8) == 0xd8)
+ return I2C_MATCH_ADDRESS_ONLY;
+
+ return 0;
+}
+
+static void
+asms_attach(device_t parent, device_t self, void *aux)
+{
+ struct asms_softc *sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+ envsys_data_t *s;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ aprint_naive("\n");
+ aprint_normal(": Sudden Motion Sensor\n");
+
+ asms_init(sc);
+
+ 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 = asms_sensors_refresh;
+
+ s = &sc->sc_sensors[0];
+ s->units = ENVSYS_INTEGER;
+ s->state = ENVSYS_SINVALID;
+ s->private = ASMS_REG_DATA_X;
+ strncpy(s->desc, "X", sizeof(s->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, s);
+
+ s = &sc->sc_sensors[1];
+ s->units = ENVSYS_INTEGER;
+ s->state = ENVSYS_SINVALID;
+ s->private = ASMS_REG_DATA_Y;
+ strncpy(s->desc, "Y", sizeof(s->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, s);
+
+ s = &sc->sc_sensors[2];
+ s->units = ENVSYS_INTEGER;
+ s->state = ENVSYS_SINVALID;
+ s->private = ASMS_REG_DATA_Z;
+ strncpy(s->desc, "Z", sizeof(s->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, s);
+
+ sysmon_envsys_register(sc->sc_sme);
+}
+
+static void
+asms_init(struct asms_softc *sc)
+{
+ int error, i, j;
+ uint8_t cmd[2], data[48];
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+
+ cmd[0] = ASMS_REG_COMMAND;
+ data[0] = ASMS_CMD_START;
+ error = iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP,
+ sc->sc_addr, cmd, 1, data, 1, 0);
+ delay(10000);
+
+ cmd[0] = 0;
+ error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP,
+ sc->sc_addr, cmd, 1, data, 48, 0);
+ iic_release_bus(sc->sc_i2c, 0);
+ if (error != 0) {
+ aprint_error_dev(sc->sc_dev, "unable to read registers.\n");
+ return;
+ }
+ for (i = 0; i < 48; i += 8) {
+ printf("%02x:", i);
+ for (j =0; j < 8; j++) {
+ printf(" %02x", data[i + j]);
+ }
+ printf("\n");
+ }
+}
+
+static void
+asms_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
+{
+ struct asms_softc *sc = sme->sme_cookie;
+ uint8_t cmd = 0;
+ int8_t data = 0;
+ int error;
+
+ cmd = edata->private;
+ iic_acquire_bus(sc->sc_i2c, 0);
+ error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP,
+ sc->sc_addr, &cmd, 1, &data, 1, 0);
+ iic_release_bus(sc->sc_i2c, 0);
+
+ if (error) {
+ edata->state = ENVSYS_SINVALID;
+ } else {
+ edata->value_cur = (int)data;
+ edata->state = ENVSYS_SVALID;
+ }
+}
diff -r 833f76356cb6 -r 32b035688045 sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c Fri Apr 24 12:17:45 2020 +0000
+++ b/sys/dev/i2c/files.i2c Fri Apr 24 12:38:31 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.110 2020/02/02 06:41:27 macallan Exp $
+# $NetBSD: files.i2c,v 1.111 2020/04/24 12:38:31 macallan Exp $
obsolete defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -311,6 +311,11 @@
attach adadc at iic
file dev/i2c/adadc.c adadc
+# Apple Sudden Motion Sensor
+device asms: sysmon_envsys
+attach asms at iic
+file dev/i2c/asms.c asms
+
# HID over i2c
# HID "bus"
define ihidbus {[ reportid = -1 ]}
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