Add dwiic, a driver for the Synopsys DesignWare i2c controller found

on the Samsung ATIV Book 9 laptop.  This initial version only
supports ACPI config/attachment.

Add ihidev, a HID-over-i2c driver largely based on uhidev.  dwiic
handles attaching ihidev devices found in ACPI.

Add ims, a HID-over-i2c mouse/trackpad driver to get basic cursor
and button functionality from HID-compliant i2c trackpads.

ok kettenis deraadt

1 files changed, 183 insertions, 0 deletions

diff --git a/sys/dev/i2c/ims.c b/sys/dev/i2c/ims.c
new file mode 100644
index 00000000000..c3bc81ed84b
--- /dev/null
+++ b/sys/dev/i2c/ims.c
@@ -0,0 +1,183 @@
+/* $OpenBSD: ims.c,v 1.1 2016/01/12 01:11:15 jcs Exp $ */
+/*
+ * HID-over-i2c mouse/trackpad driver
+ *
+ * Copyright (c) 2015, 2016 joshua stein <jcs@openbsd.org>
+ *
+ * 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/kernel.h>
+#include <sys/device.h>
+#include <sys/ioctl.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/ihidev.h>
+
+#include <dev/wscons/wsconsio.h>
+#include <dev/wscons/wsmousevar.h>
+
+#include <dev/hid/hid.h>
+#include <dev/hid/hidmsvar.h>
+
+struct ims_softc {
+	struct ihidev	sc_hdev;
+	struct hidms	sc_ms;
+};
+
+void	ims_intr(struct ihidev *addr, void *ibuf, u_int len);
+
+int	ims_enable(void *);
+void	ims_disable(void *);
+int	ims_ioctl(void *, u_long, caddr_t, int, struct proc *);
+
+const struct wsmouse_accessops ims_accessops = {
+	ims_enable,
+	ims_ioctl,
+	ims_disable,
+};
+
+int	ims_match(struct device *, void *, void *);
+void	ims_attach(struct device *, struct device *, void *);
+int	ims_detach(struct device *, int);
+
+struct cfdriver ims_cd = {
+	NULL, "ims", DV_DULL
+};
+
+const struct cfattach ims_ca = {
+	sizeof(struct ims_softc),
+	ims_match,
+	ims_attach,
+	ims_detach
+};
+
+int
+ims_match(struct device *parent, void *match, void *aux)
+{
+	struct ihidev_attach_arg *iha = (struct ihidev_attach_arg *)aux;
+	int size;
+	void *desc;
+
+	ihidev_get_report_desc(iha->parent, &desc, &size);
+
+	if (hid_is_collection(desc, size, iha->reportid,
+	    HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_POINTER)))
+		return (IMATCH_IFACECLASS);
+
+	if (hid_is_collection(desc, size, iha->reportid,
+	    HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_MOUSE)))
+		return (IMATCH_IFACECLASS);
+
+	if (hid_is_collection(desc, size, iha->reportid,
+	    HID_USAGE2(HUP_DIGITIZERS, HUD_PEN)))
+		return (IMATCH_IFACECLASS);
+
+	return (IMATCH_NONE);
+}
+
+void
+ims_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct ims_softc *sc = (struct ims_softc *)self;
+	struct hidms *ms = &sc->sc_ms;
+	struct ihidev_attach_arg *iha = (struct ihidev_attach_arg *)aux;
+	int size, repid;
+	void *desc;
+
+	sc->sc_hdev.sc_intr = ims_intr;
+	sc->sc_hdev.sc_parent = iha->parent;
+	sc->sc_hdev.sc_report_id = iha->reportid;
+
+	ihidev_get_report_desc(iha->parent, &desc, &size);
+	repid = iha->reportid;
+	sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid);
+	sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid);
+	sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid);
+
+	if (hidms_setup(self, ms, 0, iha->reportid, desc, size) != 0)
+		return;
+
+	hidms_attach(ms, &ims_accessops);
+}
+
+int
+ims_detach(struct device *self, int flags)
+{
+	struct ims_softc *sc = (struct ims_softc *)self;
+	struct hidms *ms = &sc->sc_ms;
+
+	return hidms_detach(ms, flags);
+}
+
+void
+ims_intr(struct ihidev *addr, void *buf, u_int len)
+{
+	struct ims_softc *sc = (struct ims_softc *)addr;
+	struct hidms *ms = &sc->sc_ms;
+
+	if (ms->sc_enabled != 0)
+		hidms_input(ms, (uint8_t *)buf, len);
+}
+
+int
+ims_enable(void *v)
+{
+	struct ims_softc *sc = v;
+	struct hidms *ms = &sc->sc_ms;
+	int rv;
+
+	if ((rv = hidms_enable(ms)) != 0)
+		return rv;
+
+	return ihidev_open(&sc->sc_hdev);
+}
+
+void
+ims_disable(void *v)
+{
+	struct ims_softc *sc = v;
+	struct hidms *ms = &sc->sc_ms;
+
+	hidms_disable(ms);
+	ihidev_close(&sc->sc_hdev);
+}
+
+int
+ims_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
+{
+	struct ims_softc *sc = v;
+	struct hidms *ms = &sc->sc_ms;
+	int rc;
+
+#if 0
+	rc = ihidev_ioctl(&sc->sc_hdev, cmd, data, flag, p);
+	if (rc != -1)
+		return rc;
+#endif
+
+	rc = hidms_ioctl(ms, cmd, data, flag, p);
+	if (rc != -1)
+		return rc;
+
+	switch (cmd) {
+	case WSMOUSEIO_GTYPE:
+		/* XXX: should we set something else? */
+		*(u_int *)data = WSMOUSE_TYPE_USB;
+		return 0;
+	default:
+		return -1;
+	}
+}