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, 120 insertions, 0 deletions

diff --git a/sys/dev/i2c/ihidev.h b/sys/dev/i2c/ihidev.h
new file mode 100644
index 00000000000..d65498735cd
--- /dev/null
+++ b/sys/dev/i2c/ihidev.h
@@ -0,0 +1,120 @@
+/* $OpenBSD: ihidev.h,v 1.1 2016/01/12 01:11:15 jcs Exp $ */
+/*
+ * HID-over-i2c driver
+ *
+ * http://download.microsoft.com/download/7/d/d/7dd44bb7-2a7a-4505-ac1c-7227d3d96d5b/hid-over-i2c-protocol-spec-v1-0.docx
+ *
+ * Copyright (c) 2015 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.
+ */
+
+/* from usbdi.h: Match codes. */
+/* First five codes is for a whole device. */
+#define IMATCH_VENDOR_PRODUCT_REV			14
+#define IMATCH_VENDOR_PRODUCT				13
+#define IMATCH_VENDOR_DEVCLASS_DEVPROTO			12
+#define IMATCH_DEVCLASS_DEVSUBCLASS_DEVPROTO		11
+#define IMATCH_DEVCLASS_DEVSUBCLASS			10
+/* Next six codes are for interfaces. */
+#define IMATCH_VENDOR_PRODUCT_REV_CONF_IFACE		 9
+#define IMATCH_VENDOR_PRODUCT_CONF_IFACE		 8
+#define IMATCH_VENDOR_IFACESUBCLASS_IFACEPROTO		 7
+#define IMATCH_VENDOR_IFACESUBCLASS			 6
+#define IMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO	 5
+#define IMATCH_IFACECLASS_IFACESUBCLASS			 4
+#define IMATCH_IFACECLASS				 3
+#define IMATCH_IFACECLASS_GENERIC			 2
+/* Generic driver */
+#define IMATCH_GENERIC					 1
+/* No match */
+#define IMATCH_NONE					 0
+
+#define IHIDBUSCF_REPORTID				0
+#define IHIDBUSCF_REPORTID_DEFAULT			-1
+
+#define ihidevcf_reportid cf_loc[IHIDBUSCF_REPORTID]
+#define IHIDEV_UNK_REPORTID IHIDBUSCF_REPORTID_DEFAULT
+
+/* 5.1.1 - HID Descriptor Format */
+struct i2c_hid_desc {
+	uint16_t wHIDDescLength;
+	uint16_t bcdVersion;
+	uint16_t wReportDescLength;
+	uint16_t wReportDescRegister;
+	uint16_t wInputRegister;
+	uint16_t wMaxInputLength;
+	uint16_t wOutputRegister;
+	uint16_t wMaxOutputLength;
+	uint16_t wCommandRegister;
+	uint16_t wDataRegister;
+	uint16_t wVendorID;
+	uint16_t wProductID;
+	uint16_t wVersionID;
+	uint32_t reserved;
+} __packed;
+
+struct ihidev_softc {
+	struct device	sc_dev;
+	i2c_tag_t	sc_tag;
+
+	i2c_addr_t	sc_addr;
+	void		*sc_ih;
+
+	union {
+		uint8_t	hid_desc_buf[sizeof(struct i2c_hid_desc)];
+		struct i2c_hid_desc hid_desc;
+	};
+
+	uint8_t		*sc_report;
+	int		sc_reportlen;
+
+	u_int		sc_nrepid;
+	struct		ihidev **sc_subdevs;
+
+	u_int		sc_isize;
+	u_char		*sc_ibuf;
+
+	int		sc_refcnt;
+};
+
+struct ihidev {
+	struct device	sc_idev;
+	struct ihidev_softc *sc_parent;
+	uint8_t		sc_report_id;
+	uint8_t		sc_state;
+#define	IHIDEV_OPEN	0x01	/* device is open */
+	void		(*sc_intr)(struct ihidev *, void *, u_int);
+
+	int		sc_isize;
+	int		sc_osize;
+	int		sc_fsize;
+};
+
+struct ihidev_attach_arg {
+	struct i2c_attach_args	*iaa;
+	struct ihidev_softc	*parent;
+	uint8_t			 reportid;
+#define	IHIDEV_CLAIM_ALLREPORTID	255
+};
+
+void ihidev_get_report_desc(struct ihidev_softc *, void **, int *);
+int ihidev_open(struct ihidev *);
+void ihidev_close(struct ihidev *);
+int ihidev_ioctl(struct ihidev *, u_long, caddr_t, int, struct proc *);
+
+int ihidev_set_report(struct ihidev_softc *, int, int, void *, int);
+int ihidev_set_report_async(struct ihidev_softc *, int, int, void *, int);
+int ihidev_get_report(struct ihidev_softc *, int, int, void *, int);
+int ihidev_get_report_async(struct ihidev_softc *, int, int, void *, int,
+    void *, void (*)(void *, int, void *, int));