c47745e977
the bit-bucket.
756 lines
17 KiB
C
756 lines
17 KiB
C
/* $NetBSD: uhid.c,v 1.38 2000/04/27 15:26:48 augustss Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (lennart@augustsson.net) at
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* Carlstedt Research & Technology.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* HID spec: http://www.usb.org/developers/data/usbhid10.pdf
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/signalvar.h>
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#elif defined(__FreeBSD__)
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#include <sys/ioccom.h>
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#include <sys/filio.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/ioccom.h>
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#endif
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#include <sys/conf.h>
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#include <sys/tty.h>
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#if __FreeBSD_version >= 500014
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#include <sys/selinfo.h>
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#else
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#include <sys/select.h>
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#endif
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/poll.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbhid.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdi_util.h>
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#include <dev/usb/hid.h>
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#ifdef UHID_DEBUG
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#define DPRINTF(x) if (uhiddebug) logprintf x
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#define DPRINTFN(n,x) if (uhiddebug>(n)) logprintf x
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int uhiddebug = 0;
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#else
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#define DPRINTF(x)
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#define DPRINTFN(n,x)
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#endif
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struct uhid_softc {
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USBBASEDEVICE sc_dev; /* base device */
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usbd_device_handle sc_udev;
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usbd_interface_handle sc_iface; /* interface */
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usbd_pipe_handle sc_intrpipe; /* interrupt pipe */
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int sc_ep_addr;
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int sc_isize;
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int sc_osize;
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int sc_fsize;
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u_int8_t sc_iid;
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u_int8_t sc_oid;
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u_int8_t sc_fid;
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u_char *sc_ibuf;
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u_char *sc_obuf;
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void *sc_repdesc;
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int sc_repdesc_size;
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struct clist sc_q;
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struct selinfo sc_rsel;
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struct proc *sc_async; /* process that wants SIGIO */
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u_char sc_state; /* driver state */
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#define UHID_OPEN 0x01 /* device is open */
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#define UHID_ASLP 0x02 /* waiting for device data */
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#define UHID_NEEDCLEAR 0x04 /* needs clearing endpoint stall */
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#define UHID_IMMED 0x08 /* return read data immediately */
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int sc_refcnt;
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u_char sc_dying;
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#if defined(__FreeBSD__)
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dev_t dev;
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#endif
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};
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#define UHIDUNIT(dev) (minor(dev))
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#define UHID_CHUNK 128 /* chunk size for read */
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#define UHID_BSIZE 1020 /* buffer size */
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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cdev_decl(uhid);
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#elif defined(__FreeBSD__)
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d_open_t uhidopen;
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d_close_t uhidclose;
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d_read_t uhidread;
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d_write_t uhidwrite;
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d_ioctl_t uhidioctl;
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d_poll_t uhidpoll;
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#define UHID_CDEV_MAJOR 122
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Static struct cdevsw uhid_cdevsw = {
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/* open */ uhidopen,
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/* close */ uhidclose,
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/* read */ uhidread,
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/* write */ uhidwrite,
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/* ioctl */ uhidioctl,
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/* poll */ uhidpoll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "uhid",
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/* maj */ UHID_CDEV_MAJOR,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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};
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#endif
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Static void uhid_intr(usbd_xfer_handle, usbd_private_handle,
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usbd_status);
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Static int uhid_do_read(struct uhid_softc *, struct uio *uio, int);
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Static int uhid_do_write(struct uhid_softc *, struct uio *uio, int);
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Static int uhid_do_ioctl(struct uhid_softc *, u_long, caddr_t, int,
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struct proc *);
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USB_DECLARE_DRIVER(uhid);
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USB_MATCH(uhid)
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{
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USB_MATCH_START(uhid, uaa);
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usb_interface_descriptor_t *id;
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if (uaa->iface == NULL)
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return (UMATCH_NONE);
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id = usbd_get_interface_descriptor(uaa->iface);
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if (id == NULL || id->bInterfaceClass != UCLASS_HID)
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return (UMATCH_NONE);
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return (UMATCH_IFACECLASS_GENERIC);
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}
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USB_ATTACH(uhid)
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{
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USB_ATTACH_START(uhid, sc, uaa);
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usbd_interface_handle iface = uaa->iface;
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usb_interface_descriptor_t *id;
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usb_endpoint_descriptor_t *ed;
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int size;
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void *desc;
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usbd_status err;
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char devinfo[1024];
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sc->sc_udev = uaa->device;
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sc->sc_iface = iface;
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id = usbd_get_interface_descriptor(iface);
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usbd_devinfo(uaa->device, 0, devinfo);
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USB_ATTACH_SETUP;
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printf("%s: %s, iclass %d/%d\n", USBDEVNAME(sc->sc_dev),
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devinfo, id->bInterfaceClass, id->bInterfaceSubClass);
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ed = usbd_interface2endpoint_descriptor(iface, 0);
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if (ed == NULL) {
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printf("%s: could not read endpoint descriptor\n",
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USBDEVNAME(sc->sc_dev));
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sc->sc_dying = 1;
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USB_ATTACH_ERROR_RETURN;
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}
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DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d "
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"bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
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" bInterval=%d\n",
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ed->bLength, ed->bDescriptorType,
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ed->bEndpointAddress & UE_ADDR,
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UE_GET_DIR(ed->bEndpointAddress)==UE_DIR_IN? "in" : "out",
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ed->bmAttributes & UE_XFERTYPE,
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UGETW(ed->wMaxPacketSize), ed->bInterval));
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if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
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(ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
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printf("%s: unexpected endpoint\n", USBDEVNAME(sc->sc_dev));
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sc->sc_dying = 1;
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USB_ATTACH_ERROR_RETURN;
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}
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sc->sc_ep_addr = ed->bEndpointAddress;
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desc = 0;
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err = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_USBDEV);
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if (err) {
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printf("%s: no report descriptor\n", USBDEVNAME(sc->sc_dev));
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sc->sc_dying = 1;
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if (desc != NULL)
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free(desc, M_USBDEV);
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USB_ATTACH_ERROR_RETURN;
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}
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(void)usbd_set_idle(iface, 0, 0);
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sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid);
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sc->sc_osize = hid_report_size(desc, size, hid_output, &sc->sc_oid);
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sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
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sc->sc_repdesc = desc;
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sc->sc_repdesc_size = size;
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#if defined(__FreeBSD__)
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sc->dev = make_dev(&uhid_cdevsw, device_get_unit(self),
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UID_ROOT, GID_OPERATOR,
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0644, "uhid%d", device_get_unit(self));
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#endif
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USB_ATTACH_SUCCESS_RETURN;
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}
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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int
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uhid_activate(self, act)
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device_ptr_t self;
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enum devact act;
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{
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struct uhid_softc *sc = (struct uhid_softc *)self;
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switch (act) {
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case DVACT_ACTIVATE:
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return (EOPNOTSUPP);
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break;
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case DVACT_DEACTIVATE:
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sc->sc_dying = 1;
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break;
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}
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return (0);
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}
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#endif
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USB_DETACH(uhid)
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{
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USB_DETACH_START(uhid, sc);
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int s;
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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int maj, mn;
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#elif defined(__FreeBSD__)
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struct vnode *vp;
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#endif
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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DPRINTF(("uhid_detach: sc=%p flags=%d\n", sc, flags));
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#else
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DPRINTF(("uhid_detach: sc=%p\n", sc));
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#endif
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sc->sc_dying = 1;
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if (sc->sc_intrpipe != NULL)
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usbd_abort_pipe(sc->sc_intrpipe);
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if (sc->sc_state & UHID_OPEN) {
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s = splusb();
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if (--sc->sc_refcnt >= 0) {
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/* Wake everyone */
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wakeup(&sc->sc_q);
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/* Wait for processes to go away. */
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usb_detach_wait(USBDEV(sc->sc_dev));
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}
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splx(s);
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}
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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/* locate the major number */
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for (maj = 0; maj < nchrdev; maj++)
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if (cdevsw[maj].d_open == uhidopen)
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break;
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/* Nuke the vnodes for any open instances (calls close). */
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mn = self->dv_unit;
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vdevgone(maj, mn, mn, VCHR);
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#elif defined(__FreeBSD__)
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vp = SLIST_FIRST(&sc->dev->si_hlist);
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if (vp)
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VOP_REVOKE(vp, REVOKEALL);
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destroy_dev(sc->dev);
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#endif
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free(sc->sc_repdesc, M_USBDEV);
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return (0);
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}
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void
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uhid_intr(xfer, addr, status)
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usbd_xfer_handle xfer;
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usbd_private_handle addr;
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usbd_status status;
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{
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struct uhid_softc *sc = addr;
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#ifdef UHID_DEBUG
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if (uhiddebug > 5) {
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u_int32_t cc, i;
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usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
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DPRINTF(("uhid_intr: status=%d cc=%d\n", status, cc));
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DPRINTF(("uhid_intr: data ="));
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for (i = 0; i < cc; i++)
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DPRINTF((" %02x", sc->sc_ibuf[i]));
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DPRINTF(("\n"));
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}
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#endif
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if (status == USBD_CANCELLED)
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return;
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if (status != USBD_NORMAL_COMPLETION) {
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DPRINTF(("uhid_intr: status=%d\n", status));
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sc->sc_state |= UHID_NEEDCLEAR;
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return;
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}
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(void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
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if (sc->sc_state & UHID_ASLP) {
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sc->sc_state &= ~UHID_ASLP;
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DPRINTFN(5, ("uhid_intr: waking %p\n", sc));
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wakeup(&sc->sc_q);
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}
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selwakeup(&sc->sc_rsel);
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if (sc->sc_async != NULL) {
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DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n", sc->sc_async));
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PROC_LOCK(sc->sc_async);
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psignal(sc->sc_async, SIGIO);
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PROC_UNLOCK(sc->sc_async);
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}
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}
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int
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uhidopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct uhid_softc *sc;
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usbd_status err;
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USB_GET_SC_OPEN(uhid, UHIDUNIT(dev), sc);
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DPRINTF(("uhidopen: sc=%p\n", sc));
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if (sc->sc_dying)
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return (ENXIO);
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if (sc->sc_state & UHID_OPEN)
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return (EBUSY);
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sc->sc_state |= UHID_OPEN;
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if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) {
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sc->sc_state &= ~UHID_OPEN;
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return (ENOMEM);
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}
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sc->sc_ibuf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK);
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sc->sc_obuf = malloc(sc->sc_osize, M_USBDEV, M_WAITOK);
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/* Set up interrupt pipe. */
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err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
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USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc, sc->sc_ibuf,
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sc->sc_isize, uhid_intr, USBD_DEFAULT_INTERVAL);
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if (err) {
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DPRINTF(("uhidopen: usbd_open_pipe_intr failed, "
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"error=%d\n",err));
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free(sc->sc_ibuf, M_USBDEV);
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free(sc->sc_obuf, M_USBDEV);
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sc->sc_state &= ~UHID_OPEN;
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return (EIO);
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}
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sc->sc_state &= ~UHID_IMMED;
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sc->sc_async = 0;
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return (0);
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}
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int
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uhidclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct uhid_softc *sc;
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USB_GET_SC(uhid, UHIDUNIT(dev), sc);
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DPRINTF(("uhidclose: sc=%p\n", sc));
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/* Disable interrupts. */
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usbd_abort_pipe(sc->sc_intrpipe);
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usbd_close_pipe(sc->sc_intrpipe);
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sc->sc_intrpipe = 0;
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ndflush(&sc->sc_q, sc->sc_q.c_cc);
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clfree(&sc->sc_q);
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free(sc->sc_ibuf, M_USBDEV);
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free(sc->sc_obuf, M_USBDEV);
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sc->sc_state &= ~UHID_OPEN;
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sc->sc_async = 0;
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return (0);
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}
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int
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uhid_do_read(sc, uio, flag)
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struct uhid_softc *sc;
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struct uio *uio;
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int flag;
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{
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int s;
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int error = 0;
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size_t length;
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u_char buffer[UHID_CHUNK];
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usbd_status err;
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DPRINTFN(1, ("uhidread\n"));
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if (sc->sc_state & UHID_IMMED) {
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DPRINTFN(1, ("uhidread immed\n"));
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err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
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sc->sc_iid, buffer, sc->sc_isize);
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if (err)
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return (EIO);
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return (uiomove(buffer, sc->sc_isize, uio));
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}
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s = splusb();
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while (sc->sc_q.c_cc == 0) {
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if (flag & IO_NDELAY) {
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splx(s);
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return (EWOULDBLOCK);
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}
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sc->sc_state |= UHID_ASLP;
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DPRINTFN(5, ("uhidread: sleep on %p\n", sc));
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error = tsleep(&sc->sc_q, PZERO | PCATCH, "uhidrea", 0);
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DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
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if (sc->sc_dying)
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error = EIO;
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if (error) {
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sc->sc_state &= ~UHID_ASLP;
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break;
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}
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if (sc->sc_state & UHID_NEEDCLEAR) {
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DPRINTFN(-1,("uhidread: clearing stall\n"));
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sc->sc_state &= ~UHID_NEEDCLEAR;
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usbd_clear_endpoint_stall(sc->sc_intrpipe);
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}
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}
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splx(s);
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/* Transfer as many chunks as possible. */
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while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) {
|
|
length = min(sc->sc_q.c_cc, uio->uio_resid);
|
|
if (length > sizeof(buffer))
|
|
length = sizeof(buffer);
|
|
|
|
/* Remove a small chunk from the input queue. */
|
|
(void) q_to_b(&sc->sc_q, buffer, length);
|
|
DPRINTFN(5, ("uhidread: got %lu chars\n", (u_long)length));
|
|
|
|
/* Copy the data to the user process. */
|
|
if ((error = uiomove(buffer, length, uio)) != 0)
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
uhidread(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
struct uhid_softc *sc;
|
|
int error;
|
|
|
|
USB_GET_SC(uhid, UHIDUNIT(dev), sc);
|
|
|
|
sc->sc_refcnt++;
|
|
error = uhid_do_read(sc, uio, flag);
|
|
if (--sc->sc_refcnt < 0)
|
|
usb_detach_wakeup(USBDEV(sc->sc_dev));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
uhid_do_write(sc, uio, flag)
|
|
struct uhid_softc *sc;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
int error;
|
|
int size;
|
|
usbd_status err;
|
|
|
|
DPRINTFN(1, ("uhidwrite\n"));
|
|
|
|
if (sc->sc_dying)
|
|
return (EIO);
|
|
|
|
size = sc->sc_osize;
|
|
error = 0;
|
|
if (uio->uio_resid != size)
|
|
return (EINVAL);
|
|
error = uiomove(sc->sc_obuf, size, uio);
|
|
if (!error) {
|
|
if (sc->sc_oid)
|
|
err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
|
|
sc->sc_obuf[0], sc->sc_obuf+1, size-1);
|
|
else
|
|
err = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
|
|
0, sc->sc_obuf, size);
|
|
if (err)
|
|
error = EIO;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
uhidwrite(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
struct uhid_softc *sc;
|
|
int error;
|
|
|
|
USB_GET_SC(uhid, UHIDUNIT(dev), sc);
|
|
|
|
sc->sc_refcnt++;
|
|
error = uhid_do_write(sc, uio, flag);
|
|
if (--sc->sc_refcnt < 0)
|
|
usb_detach_wakeup(USBDEV(sc->sc_dev));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
uhid_do_ioctl(sc, cmd, addr, flag, p)
|
|
struct uhid_softc *sc;
|
|
u_long cmd;
|
|
caddr_t addr;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
struct usb_ctl_report_desc *rd;
|
|
struct usb_ctl_report *re;
|
|
int size, id;
|
|
usbd_status err;
|
|
|
|
DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
|
|
|
|
if (sc->sc_dying)
|
|
return (EIO);
|
|
|
|
switch (cmd) {
|
|
case FIONBIO:
|
|
/* All handled in the upper FS layer. */
|
|
break;
|
|
|
|
case FIOASYNC:
|
|
if (*(int *)addr) {
|
|
if (sc->sc_async != NULL)
|
|
return (EBUSY);
|
|
sc->sc_async = p;
|
|
DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n", p));
|
|
} else
|
|
sc->sc_async = NULL;
|
|
break;
|
|
|
|
/* XXX this is not the most general solution. */
|
|
case TIOCSPGRP:
|
|
if (sc->sc_async == NULL)
|
|
return (EINVAL);
|
|
if (*(int *)addr != sc->sc_async->p_pgid)
|
|
return (EPERM);
|
|
break;
|
|
|
|
case USB_GET_REPORT_DESC:
|
|
rd = (struct usb_ctl_report_desc *)addr;
|
|
size = min(sc->sc_repdesc_size, sizeof rd->data);
|
|
rd->size = size;
|
|
memcpy(rd->data, sc->sc_repdesc, size);
|
|
break;
|
|
|
|
case USB_SET_IMMED:
|
|
if (*(int *)addr) {
|
|
/* XXX should read into ibuf, but does it matter? */
|
|
err = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
|
|
sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
|
|
if (err)
|
|
return (EOPNOTSUPP);
|
|
|
|
sc->sc_state |= UHID_IMMED;
|
|
} else
|
|
sc->sc_state &= ~UHID_IMMED;
|
|
break;
|
|
|
|
case USB_GET_REPORT:
|
|
re = (struct usb_ctl_report *)addr;
|
|
switch (re->report) {
|
|
case UHID_INPUT_REPORT:
|
|
size = sc->sc_isize;
|
|
id = sc->sc_iid;
|
|
break;
|
|
case UHID_OUTPUT_REPORT:
|
|
size = sc->sc_osize;
|
|
id = sc->sc_oid;
|
|
break;
|
|
case UHID_FEATURE_REPORT:
|
|
size = sc->sc_fsize;
|
|
id = sc->sc_fid;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
err = usbd_get_report(sc->sc_iface, re->report, id, re->data,
|
|
size);
|
|
if (err)
|
|
return (EIO);
|
|
break;
|
|
|
|
case USB_SET_REPORT:
|
|
re = (struct usb_ctl_report *)addr;
|
|
switch (re->report) {
|
|
case UHID_INPUT_REPORT:
|
|
size = sc->sc_isize;
|
|
id = sc->sc_iid;
|
|
break;
|
|
case UHID_OUTPUT_REPORT:
|
|
size = sc->sc_osize;
|
|
id = sc->sc_oid;
|
|
break;
|
|
case UHID_FEATURE_REPORT:
|
|
size = sc->sc_fsize;
|
|
id = sc->sc_fid;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
err = usbd_set_report(sc->sc_iface, re->report, id, re->data,
|
|
size);
|
|
if (err)
|
|
return (EIO);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
uhidioctl(dev, cmd, addr, flag, p)
|
|
dev_t dev;
|
|
u_long cmd;
|
|
caddr_t addr;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
struct uhid_softc *sc;
|
|
int error;
|
|
|
|
USB_GET_SC(uhid, UHIDUNIT(dev), sc);
|
|
|
|
sc->sc_refcnt++;
|
|
error = uhid_do_ioctl(sc, cmd, addr, flag, p);
|
|
if (--sc->sc_refcnt < 0)
|
|
usb_detach_wakeup(USBDEV(sc->sc_dev));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
uhidpoll(dev, events, p)
|
|
dev_t dev;
|
|
int events;
|
|
struct proc *p;
|
|
{
|
|
struct uhid_softc *sc;
|
|
int revents = 0;
|
|
int s;
|
|
|
|
USB_GET_SC(uhid, UHIDUNIT(dev), sc);
|
|
|
|
if (sc->sc_dying)
|
|
return (EIO);
|
|
|
|
s = splusb();
|
|
if (events & (POLLOUT | POLLWRNORM))
|
|
revents |= events & (POLLOUT | POLLWRNORM);
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
|
if (sc->sc_q.c_cc > 0)
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
else
|
|
selrecord(p, &sc->sc_rsel);
|
|
}
|
|
|
|
splx(s);
|
|
return (revents);
|
|
}
|
|
|
|
#if defined(__FreeBSD__)
|
|
DRIVER_MODULE(uhid, uhub, uhid_driver, uhid_devclass, usbd_driver_load, 0);
|
|
#endif
|