/*	$OpenBSD: ums.c,v 1.4 2001/01/28 09:43:42 aaron Exp $ */
/*	$NetBSD: ums.c,v 1.45 2000/10/08 20:52:18 augustss Exp $	*/

/*
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson (lennart@augustsson.net) at
 * Carlstedt Research & Technology.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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.
 */

/*
 * HID spec: http://www.usb.org/developers/data/devclass/hid1_1.pdf
 */

/* XXX complete SPUR_UP change */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/poll.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>

#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usb_quirks.h>
#include <dev/usb/hid.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>

#ifdef USB_DEBUG
#define DPRINTF(x)	if (umsdebug) logprintf x
#define DPRINTFN(n,x)	if (umsdebug>(n)) logprintf x
int	umsdebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif

#define UMS_BUT(i) ((i) == 1 || (i) == 2 ? 3 - (i) : i)

#define UMSUNIT(s)	(minor(s))

#define PS2LBUTMASK	x01
#define PS2RBUTMASK	x02
#define PS2MBUTMASK	x04
#define PS2BUTMASK 0x0f

struct ums_softc {
	USBBASEDEVICE sc_dev;		/* base device */
	usbd_device_handle sc_udev;
	usbd_interface_handle sc_iface;	/* interface */
	usbd_pipe_handle sc_intrpipe;	/* interrupt pipe */
	int sc_ep_addr;

	u_char *sc_ibuf;
	u_int8_t sc_iid;
	int sc_isize;
	struct hid_location sc_loc_x, sc_loc_y, sc_loc_z;
	struct hid_location *sc_loc_btn;

	int sc_enabled;

	int flags;		/* device configuration */
#define UMS_Z		0x01	/* z direction available */
#define UMS_SPUR_BUT_UP	0x02	/* spurious button up events */
#define UMS_REVZ	0x04	/* Z-axis is reversed */

	int nbuttons;
#define MAX_BUTTONS	31	/* chosen because sc_buttons is u_int32_t */

	u_int32_t sc_buttons;	/* mouse button status */
	struct device *sc_wsmousedev;

	char			sc_dying;
};

#define MOUSE_FLAGS_MASK (HIO_CONST|HIO_RELATIVE)
#define MOUSE_FLAGS (HIO_RELATIVE)

Static void ums_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);

Static int	ums_enable(void *);
Static void	ums_disable(void *);
Static int	ums_ioctl(void *, u_long, caddr_t, int, struct proc *);

const struct wsmouse_accessops ums_accessops = {
	ums_enable,
	ums_ioctl,
	ums_disable,
};

USB_DECLARE_DRIVER(ums);

USB_MATCH(ums)
{
	USB_MATCH_START(ums, uaa);
	usb_interface_descriptor_t *id;
	int size, ret;
	void *desc;
	usbd_status err;
	
	if (uaa->iface == NULL)
		return (UMATCH_NONE);
	id = usbd_get_interface_descriptor(uaa->iface);
	if (id == NULL || id->bInterfaceClass != UICLASS_HID)
		return (UMATCH_NONE);

	err = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_TEMP);
	if (err)
		return (UMATCH_NONE);

	if (hid_is_collection(desc, size, 
			      HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_MOUSE)))
		ret = UMATCH_IFACECLASS;
	else
		ret = UMATCH_NONE;

	free(desc, M_TEMP);
	return (ret);
}

USB_ATTACH(ums)
{
	USB_ATTACH_START(ums, sc, uaa);
	usbd_interface_handle iface = uaa->iface;
	usb_interface_descriptor_t *id;
	usb_endpoint_descriptor_t *ed;
	struct wsmousedev_attach_args a;
	int size;
	void *desc;
	usbd_status err;
	char devinfo[1024];
	u_int32_t flags, quirks;
	int i, wheel;
	struct hid_location loc_btn;
	
	sc->sc_udev = uaa->device;
	sc->sc_iface = iface;
	id = usbd_get_interface_descriptor(iface);
	usbd_devinfo(uaa->device, 0, devinfo);
	USB_ATTACH_SETUP;
	printf("%s: %s, iclass %d/%d\n", USBDEVNAME(sc->sc_dev),
	       devinfo, id->bInterfaceClass, id->bInterfaceSubClass);
	ed = usbd_interface2endpoint_descriptor(iface, 0);
	if (ed == NULL) {
		printf("%s: could not read endpoint descriptor\n",
		       USBDEVNAME(sc->sc_dev));
		USB_ATTACH_ERROR_RETURN;
	}

	DPRINTFN(10,("ums_attach: bLength=%d bDescriptorType=%d "
		     "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
		     " bInterval=%d\n",
		     ed->bLength, ed->bDescriptorType, 
		     ed->bEndpointAddress & UE_ADDR,
		     UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
		     ed->bmAttributes & UE_XFERTYPE,
		     UGETW(ed->wMaxPacketSize), ed->bInterval));

	if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
	    (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
		printf("%s: unexpected endpoint\n",
		       USBDEVNAME(sc->sc_dev));
		USB_ATTACH_ERROR_RETURN;
	}

	quirks = usbd_get_quirks(uaa->device)->uq_flags;
	if (quirks & UQ_MS_REVZ)
		sc->flags |= UMS_REVZ;
	if (quirks & UQ_SPUR_BUT_UP)
		sc->flags |= UMS_SPUR_BUT_UP;

	err = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_TEMP);
	if (err)
		USB_ATTACH_ERROR_RETURN;

	if (!hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X),
		       hid_input, &sc->sc_loc_x, &flags)) {
		printf("%s: mouse has no X report\n", USBDEVNAME(sc->sc_dev));
		USB_ATTACH_ERROR_RETURN;
	}
	if ((flags & MOUSE_FLAGS_MASK) != MOUSE_FLAGS) {
		printf("%s: X report 0x%04x not supported\n",
		       USBDEVNAME(sc->sc_dev), flags);
		USB_ATTACH_ERROR_RETURN;
	}

	if (!hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y),
		       hid_input, &sc->sc_loc_y, &flags)) {
		printf("%s: mouse has no Y report\n", USBDEVNAME(sc->sc_dev));
		USB_ATTACH_ERROR_RETURN;
	}
	if ((flags & MOUSE_FLAGS_MASK) != MOUSE_FLAGS) {
		printf("%s: Y report 0x%04x not supported\n",
		       USBDEVNAME(sc->sc_dev), flags);
		USB_ATTACH_ERROR_RETURN;
	}

	/* Try to guess the Z activator: first check Z, then WHEEL. */
	wheel = 0;
	if (hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Z),
		       hid_input, &sc->sc_loc_z, &flags) ||
	    (wheel = hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP,
						       HUG_WHEEL),
		       hid_input, &sc->sc_loc_z, &flags))) {
		if ((flags & MOUSE_FLAGS_MASK) != MOUSE_FLAGS) {
			sc->sc_loc_z.size = 0;	/* Bad Z coord, ignore it */
		} else {
			sc->flags |= UMS_Z;
			/* Wheels need the Z axis reversed. */
			if (wheel)
				sc->flags ^= UMS_REVZ;
		}
	}

	/* figure out the number of buttons */
	for (i = 1; i <= MAX_BUTTONS; i++)
		if (!hid_locate(desc, size, HID_USAGE2(HUP_BUTTON, i),
				hid_input, &loc_btn, 0))
			break;
	sc->nbuttons = i - 1;
	sc->sc_loc_btn = malloc(sizeof(struct hid_location) * sc->nbuttons, 
				M_USBDEV, M_NOWAIT);
	if (!sc->sc_loc_btn) {
		printf("%s: no memory\n", USBDEVNAME(sc->sc_dev));
		USB_ATTACH_ERROR_RETURN;
	}

	printf("%s: %d button%s%s\n", USBDEVNAME(sc->sc_dev),
	    sc->nbuttons, sc->nbuttons == 1 ? "" : "s",
	    sc->flags & UMS_Z ? " and Z dir." : "");

	for (i = 1; i <= sc->nbuttons; i++)
		hid_locate(desc, size, HID_USAGE2(HUP_BUTTON, i),
				hid_input, &sc->sc_loc_btn[i-1], 0);

	sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid);
	sc->sc_ibuf = malloc(sc->sc_isize, M_USBDEV, M_NOWAIT);
	if (sc->sc_ibuf == NULL) {
		printf("%s: no memory\n", USBDEVNAME(sc->sc_dev));
		free(sc->sc_loc_btn, M_USBDEV);
		USB_ATTACH_ERROR_RETURN;
	}

	sc->sc_ep_addr = ed->bEndpointAddress;
	free(desc, M_TEMP);

#ifdef USB_DEBUG
	DPRINTF(("ums_attach: sc=%p\n", sc));
	DPRINTF(("ums_attach: X\t%d/%d\n", 
		 sc->sc_loc_x.pos, sc->sc_loc_x.size));
	DPRINTF(("ums_attach: Y\t%d/%d\n", 
		 sc->sc_loc_x.pos, sc->sc_loc_x.size));
	if (sc->flags & UMS_Z)
		DPRINTF(("ums_attach: Z\t%d/%d\n", 
			 sc->sc_loc_z.pos, sc->sc_loc_z.size));
	for (i = 1; i <= sc->nbuttons; i++) {
		DPRINTF(("ums_attach: B%d\t%d/%d\n",
			 i, sc->sc_loc_btn[i-1].pos,sc->sc_loc_btn[i-1].size));
	}
	DPRINTF(("ums_attach: size=%d, id=%d\n", sc->sc_isize, sc->sc_iid));
#endif

	a.accessops = &ums_accessops;
	a.accesscookie = sc;

	sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);

	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
			   USBDEV(sc->sc_dev));

	USB_ATTACH_SUCCESS_RETURN;
}

int
ums_activate(device_ptr_t self, enum devact act)
{
	struct ums_softc *sc = (struct ums_softc *)self;
	int rv = 0;

	switch (act) {
	case DVACT_ACTIVATE:
		return (EOPNOTSUPP);
		break;

	case DVACT_DEACTIVATE:
		if (sc->sc_wsmousedev != NULL)
			rv = config_deactivate(sc->sc_wsmousedev);
		sc->sc_dying = 1;
		break;
	}
	return (rv);
}

USB_DETACH(ums)
{
	USB_DETACH_START(ums, sc);
	int rv = 0;

	DPRINTF(("ums_detach: sc=%p flags=%d\n", sc, flags));

	/* No need to do reference counting of ums, wsmouse has all the goo. */
	if (sc->sc_wsmousedev != NULL)
		rv = config_detach(sc->sc_wsmousedev, flags);
	if (rv == 0) {
		free(sc->sc_loc_btn, M_USBDEV);
		free(sc->sc_ibuf, M_USBDEV);
	}

	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
			   USBDEV(sc->sc_dev));

	return (rv);
}

void
ums_intr(usbd_xfer_handle xfer, usbd_private_handle addr, usbd_status status)
{
	struct ums_softc *sc = addr;
	u_char *ibuf;
	int dx, dy, dz;
	u_int32_t buttons = 0;
	int i;
	int s;

	DPRINTFN(5, ("ums_intr: sc=%p status=%d\n", sc, status));
	DPRINTFN(5, ("ums_intr: data = %02x %02x %02x\n",
		     sc->sc_ibuf[0], sc->sc_ibuf[1], sc->sc_ibuf[2]));

	if (status == USBD_CANCELLED)
		return;

	if (status) {
		DPRINTF(("ums_intr: status=%d\n", status));
		usbd_clear_endpoint_stall_async(sc->sc_intrpipe);
		return;
	}

	ibuf = sc->sc_ibuf;
	if (sc->sc_iid != 0) {
		if (*ibuf++ != sc->sc_iid)
			return;
	}
	dx =  hid_get_data(ibuf, &sc->sc_loc_x);
	dy = -hid_get_data(ibuf, &sc->sc_loc_y);
	dz =  hid_get_data(ibuf, &sc->sc_loc_z);
	if (sc->flags & UMS_REVZ)
		dz = -dz;
	for (i = 0; i < sc->nbuttons; i++)
		if (hid_get_data(ibuf, &sc->sc_loc_btn[i]))
			buttons |= (1 << UMS_BUT(i));

	if (dx != 0 || dy != 0 || dz != 0 || buttons != sc->sc_buttons) {
		DPRINTFN(10, ("ums_intr: x:%d y:%d z:%d buttons:0x%x\n",
			dx, dy, dz, buttons));
		sc->sc_buttons = buttons;
		if (sc->sc_wsmousedev != NULL) {
			s = spltty();
			wsmouse_input(sc->sc_wsmousedev, buttons, dx, dy, dz,
				      WSMOUSE_INPUT_DELTA);
			splx(s);
		}
	}
}

Static int
ums_enable(void *v)
{
	struct ums_softc *sc = v;

	usbd_status err;

	DPRINTFN(1,("ums_enable: sc=%p\n", sc));

	if (sc->sc_dying)
		return (EIO);

	if (sc->sc_enabled)
		return (EBUSY);

	sc->sc_enabled = 1;
	sc->sc_buttons = 0;

	/* Set up interrupt pipe. */
	err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr, 
		  USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, 
		  sc->sc_ibuf, sc->sc_isize, ums_intr, USBD_DEFAULT_INTERVAL);
	if (err) {
		DPRINTF(("ums_enable: usbd_open_pipe_intr failed, error=%d\n",
			 err));
		sc->sc_enabled = 0;
		return (EIO);
	}
	return (0);
}

Static void
ums_disable(void *v)
{
	struct ums_softc *sc = v;

	DPRINTFN(1,("ums_disable: sc=%p\n", sc));
#ifdef DIAGNOSTIC
	if (!sc->sc_enabled) {
		printf("ums_disable: not enabled\n");
		return;
	}
#endif

	/* Disable interrupts. */
	usbd_abort_pipe(sc->sc_intrpipe);
	usbd_close_pipe(sc->sc_intrpipe);

	sc->sc_enabled = 0;
}

Static int
ums_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)

{
	switch (cmd) {
	case WSMOUSEIO_GTYPE:
		*(u_int *)data = WSMOUSE_TYPE_USB;
		return (0);
	}

	return (-1);
}