NetBSD/sys/dev/usb/uipad.c

/*	$NetBSD: uipad.c,v 1.1 2011/12/31 00:08:48 christos Exp $	*/

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Christos Zoulas.
 *
 * 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 pipadr 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uipad.c,v 1.1 2011/12/31 00:08:48 christos Exp $");

#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/conf.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/poll.h>
#include <sys/bus.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdivar.h>

#include <dev/usb/usbdevs.h>

#ifdef UIPAD_DEBUG
#define DPRINTF(x)	if (uipaddebug) printf x
#define DPRINTFN(n, x)	if (uipaddebug > n) printf x
int	uipaddebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif

struct uipad_softc {
 	device_t		sc_dev;
	usbd_device_handle	sc_udev;
};

/*
 * Note that we do not attach to USB_PRODUCT_RIM_BLACKBERRY_PEARL_DUAL
 * as we let umass claim the device instead.
 */
static const struct usb_devno uipad_devs[] = {
	{ USB_VENDOR_APPLE, USB_PRODUCT_APPLE_IPAD },
};

#define uipad_lookup(v, p) usb_lookup(uipad_devs, v, p)

int	uipad_match(device_t, cfdata_t, void *);
void	uipad_attach(device_t, device_t, void *);
int	uipad_detach(device_t, int);
int	uipad_activate(device_t, enum devact);

extern struct cfdriver uipad_cd;
CFATTACH_DECL_NEW(uipad, sizeof(struct uipad_softc), uipad_match,
    uipad_attach, uipad_detach, NULL);

static void
uipad_cmd(struct uipad_softc *sc, uint8_t requestType, uint8_t reqno,
    uint16_t value, uint16_t index)
{
	usb_device_request_t req;
	usbd_status err;
 
	DPRINTF(("ipad cmd type=%x, number=%x, value=%d, index=%d\n",
	    requestType, reqno, value, index));
        req.bmRequestType = requestType;
        req.bRequest = reqno;
        USETW(req.wValue, value); 
        USETW(req.wIndex, index);
        USETW(req.wLength, 0);
   
        if ((err = usbd_do_request(sc->sc_udev, &req, NULL)) != 0)
		aprint_error_dev(sc->sc_dev, "sending command failed %d\n",
		    err);
}

static void
uipad_charge(struct uipad_softc *sc)
{
	if (sc->sc_udev->power != USB_MAX_POWER)
		uipad_cmd(sc, UT_VENDOR | UT_WRITE, 0x40, 0x6400, 0x6400);
}

int 
uipad_match(device_t parent, cfdata_t match, void *aux)
{
	struct usb_attach_arg *uaa = aux;

	DPRINTFN(50, ("uipad_match\n"));
	return uipad_lookup(uaa->vendor, uaa->product) != NULL ?
	    UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}

void 
uipad_attach(device_t parent, device_t self, void *aux)
{
	struct uipad_softc *sc = device_private(self);
	struct usb_attach_arg *uaa = aux;
	usbd_device_handle	dev = uaa->device;
	char			*devinfop;

	DPRINTFN(10,("uipad_attach: sc=%p\n", sc));

	sc->sc_dev = self;
	sc->sc_udev = dev;

	aprint_naive("\n");
	aprint_normal("\n");

	devinfop = usbd_devinfo_alloc(dev, 0);
	aprint_normal_dev(self, "%s\n", devinfop);
	usbd_devinfo_free(devinfop);

	uipad_charge(sc);

	DPRINTFN(10, ("uipad_attach: %p\n", sc->sc_udev));

	if (!pmf_device_register(self, NULL, NULL))
		aprint_error_dev(self, "couldn't establish power handler\n");

	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);
	return;
}

int 
uipad_detach(device_t self, int flags)
{
	struct uipad_softc *sc = device_private(self);
	DPRINTF(("uipad_detach: sc=%p flags=%d\n", sc, flags));

	pmf_device_deregister(self);

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

	return 0;
}