SIXAXIS/DS3 enable, mode operational

/*
 * The Sony Sixaxis does not handle HID Output Reports on the Interrupt EP
 * like it should according to usbhid/hid-core.c::usbhid_output_raw_report()
 * so we need to override that forcing HID Output Reports on the Control EP.
 *
 * There is also another issue about HID Output Reports via USB, the Sixaxis
 * does not want the report_id as part of the data packet, so we have to
 * discard buf[0] when sending the actual control message, even for numbered
 * reports, humpf!
 */
static int sixaxis_usb_output_raw_report(struct hid_device *hid, __u8 *buf,
                size_t count, unsigned char report_type)
{
        struct usb_interface *intf = to_usb_interface(hid->dev.parent);
        struct usb_device *dev = interface_to_usbdev(intf);
        struct usb_host_interface *interface = intf->cur_altsetting;
        int report_id = buf[0];
        int ret;

        if (report_type == HID_OUTPUT_REPORT) {
                /* Don't send the Report ID */
                buf++;
                count--;
        }

        ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                HID_REQ_SET_REPORT,
                USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                ((report_type + 1) << 8) | report_id,
                interface->desc.bInterfaceNumber, buf, count,
                USB_CTRL_SET_TIMEOUT);

        /* Count also the Report ID, in case of an Output report. */
        if (ret > 0 && report_type == HID_OUTPUT_REPORT)
                ret++;

        return ret;
}

/*
 * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller
 * to "operational".  Without this, the ps3 controller will not report any
 * events.
 */
static int sixaxis_set_operational_usb(struct hid_device *hdev)
{
        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
        struct usb_device *dev = interface_to_usbdev(intf);
        __u16 ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
        int ret;
        char *buf = kmalloc(18, GFP_KERNEL);

        if (!buf)
                return -ENOMEM;

        ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
                                 HID_REQ_GET_REPORT,
                                 USB_DIR_IN | USB_TYPE_CLASS |
                                 USB_RECIP_INTERFACE,
                                 (3 << 8) | 0xf2, ifnum, buf, 17,
                                 USB_CTRL_GET_TIMEOUT);
        if (ret < 0)
                hid_err(hdev, "can't set operational mode\n");

        kfree(buf);

        return ret;
}