/* $OpenBSD: uscanner.c,v 1.44 2011/01/25 20:03:36 jakemsr Exp $ */ /* $NetBSD: uscanner.c,v 1.40 2003/01/27 00:32:44 wiz Exp $ */ /* * Copyright (c) 2000 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 * and Nick Hibma (n_hibma@qubesoft.com). * * 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. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef USCANNER_DEBUG #define DPRINTF(x) do { if (uscannerdebug) printf x; } while (0) #define DPRINTFN(n,x) do { if (uscannerdebug>(n)) printf x; } while (0) int uscannerdebug = 0; #else #define DPRINTF(x) #define DPRINTFN(n,x) #endif struct uscan_info { struct usb_devno devno; u_int flags; #define USC_KEEP_OPEN 1 }; /* Table of scanners that may work with this driver. */ static const struct uscan_info uscanner_devs[] = { /* Acer Peripherals */ {{ USB_VENDOR_ACERP, USB_PRODUCT_ACERP_ACERSCAN_320U }, 0 }, {{ USB_VENDOR_ACERP, USB_PRODUCT_ACERP_ACERSCAN_640U }, 0 }, {{ USB_VENDOR_ACERP, USB_PRODUCT_ACERP_ACERSCAN_620U }, 0 }, {{ USB_VENDOR_ACERP, USB_PRODUCT_ACERP_ACERSCAN_C310U }, 0 }, /* AGFA */ {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCAN1236U }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCAN1212U }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCAN1212U2 }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANTOUCH }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANE40 }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANE50 }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANE20 }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANE25 }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANE26 }, 0 }, {{ USB_VENDOR_AGFA, USB_PRODUCT_AGFA_SNAPSCANE52 }, 0 }, /* Avision */ {{ USB_VENDOR_AVISION, USB_PRODUCT_AVISION_1200U }, 0 }, /* Canon */ {{ USB_VENDOR_CANON, USB_PRODUCT_CANON_N656U }, 0 }, {{ USB_VENDOR_CANON, USB_PRODUCT_CANON_N670U }, 0 }, {{ USB_VENDOR_CANON, USB_PRODUCT_CANON_N1220U }, 0 }, {{ USB_VENDOR_CANON, USB_PRODUCT_CANON_N1240U }, 0 }, /* Kye */ {{ USB_VENDOR_KYE, USB_PRODUCT_KYE_VIVIDPRO }, 0 }, /* HP */ {{ USB_VENDOR_HP, USB_PRODUCT_HP_2200C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_3300C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_3400CSE }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_4100C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_4200C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_4300C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_S20 }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_5200C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_6200C }, 0 }, {{ USB_VENDOR_HP, USB_PRODUCT_HP_6300C }, 0 }, /* Mustek */ {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_1200CU }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_BEARPAW1200F }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_600USB }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_600CU }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_1200USB }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_1200UB }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_1200USBPLUS }, 0 }, {{ USB_VENDOR_MUSTEK, USB_PRODUCT_MUSTEK_1200CUPLUS }, 0 }, /* National */ {{ USB_VENDOR_NATIONAL, USB_PRODUCT_NATIONAL_BEARPAW1200 }, 0 }, {{ USB_VENDOR_NATIONAL, USB_PRODUCT_NATIONAL_BEARPAW2400 }, 0 }, /* Primax */ {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G2X300 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G2E300 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G2300 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G2E3002 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_9600 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_600U }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_6200 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_19200 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_1200U }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G600 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_636I }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G2600 }, 0 }, {{ USB_VENDOR_PRIMAX, USB_PRODUCT_PRIMAX_G2E600 }, 0 }, /* Epson */ {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_636 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_610 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1200 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1240 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1260 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1600 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1640 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1660 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_640U }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_1650 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_2400 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_DX3800 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_DX4000 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_DX5000 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_DX6000 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_CX5400 }, 0 }, {{ USB_VENDOR_EPSON, USB_PRODUCT_EPSON_GT9700F }, USC_KEEP_OPEN }, /* UMAX */ {{ USB_VENDOR_UMAX, USB_PRODUCT_UMAX_ASTRA1220U }, 0 }, {{ USB_VENDOR_UMAX, USB_PRODUCT_UMAX_ASTRA1236U }, 0 }, {{ USB_VENDOR_UMAX, USB_PRODUCT_UMAX_ASTRA2000U }, 0 }, {{ USB_VENDOR_UMAX, USB_PRODUCT_UMAX_ASTRA2200U }, 0 }, {{ USB_VENDOR_UMAX, USB_PRODUCT_UMAX_ASTRA3400 }, 0 }, /* Visioneer */ {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_3000 }, 0 }, {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_5300 }, 0 }, {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_7600 }, 0 }, {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_6100 }, 0 }, {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_6200 }, 0 }, {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_8100 }, 0 }, {{ USB_VENDOR_VISIONEER, USB_PRODUCT_VISIONEER_8600 }, 0 }, /* Ultima */ {{ USB_VENDOR_ULTIMA, USB_PRODUCT_ULTIMA_1200UBPLUS }, 0 }, }; #define uscanner_lookup(v, p) ((const struct uscan_info *)usb_lookup(uscanner_devs, v, p)) #define USCANNER_BUFFERSIZE 1024 struct uscanner_softc { struct device sc_dev; /* base device */ usbd_device_handle sc_udev; usbd_interface_handle sc_iface; u_int sc_dev_flags; usbd_pipe_handle sc_bulkin_pipe; int sc_bulkin; usbd_xfer_handle sc_bulkin_xfer; void *sc_bulkin_buffer; int sc_bulkin_bufferlen; int sc_bulkin_datalen; usbd_pipe_handle sc_bulkout_pipe; int sc_bulkout; usbd_xfer_handle sc_bulkout_xfer; void *sc_bulkout_buffer; int sc_bulkout_bufferlen; int sc_bulkout_datalen; struct selinfo sc_selq; u_char sc_state; #define USCANNER_OPEN 0x01 /* opened */ int sc_refcnt; u_char sc_dying; }; int uscanner_do_read(struct uscanner_softc *, struct uio *, int); int uscanner_do_write(struct uscanner_softc *, struct uio *, int); void uscanner_do_close(struct uscanner_softc *); #define USCANNERUNIT(n) (minor(n)) int uscanner_match(struct device *, void *, void *); void uscanner_attach(struct device *, struct device *, void *); int uscanner_detach(struct device *, int); int uscanner_activate(struct device *, int); struct cfdriver uscanner_cd = { NULL, "uscanner", DV_DULL }; const struct cfattach uscanner_ca = { sizeof(struct uscanner_softc), uscanner_match, uscanner_attach, uscanner_detach, uscanner_activate, }; int uscanner_match(struct device *parent, void *match, void *aux) { struct usb_attach_arg *uaa = aux; usb_interface_descriptor_t *id; if (uaa->iface == NULL) return UMATCH_NONE; /* do not grab the entire device */ if (uscanner_lookup(uaa->vendor, uaa->product) == NULL) return UMATCH_NONE; /* not in the list of known devices */ id = usbd_get_interface_descriptor(uaa->iface); if (id == NULL) return UMATCH_NONE; /* * There isn't a specific UICLASS for scanners, many vendors use * UICLASS_VENDOR, so detecting the right interface is not so easy. * But certainly we can exclude PRINTER and MASS - which some * multifunction devices implement. */ if (id->bInterfaceClass == UICLASS_PRINTER || id->bInterfaceClass == UICLASS_MASS) return UMATCH_NONE; return UMATCH_VENDOR_PRODUCT; } void uscanner_attach(struct device *parent, struct device *self, void *aux) { struct uscanner_softc *sc = (struct uscanner_softc *)self; struct usb_attach_arg *uaa = aux; usb_interface_descriptor_t *id = 0; usb_endpoint_descriptor_t *ed, *ed_bulkin = NULL, *ed_bulkout = NULL; int i; usbd_status err; int ifnum; sc->sc_dev_flags = uscanner_lookup(uaa->vendor, uaa->product)->flags; sc->sc_udev = uaa->device; id = usbd_get_interface_descriptor(uaa->iface); ifnum = id->bInterfaceNumber; err = usbd_device2interface_handle(sc->sc_udev, ifnum, &sc->sc_iface); if (!err && sc->sc_iface) id = usbd_get_interface_descriptor(sc->sc_iface); if (err || id == 0) { printf("%s: could not get interface descriptor, err=%d,id=%p\n", sc->sc_dev.dv_xname, err, id); return; } /* Find the two first bulk endpoints */ for (i = 0 ; i < id->bNumEndpoints; i++) { ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); if (ed == 0) { printf("%s: could not read endpoint descriptor\n", sc->sc_dev.dv_xname); return; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { ed_bulkin = ed; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { ed_bulkout = ed; } if (ed_bulkin && ed_bulkout) /* found all we need */ break; } /* Verify that we goething sensible */ if (ed_bulkin == NULL || ed_bulkout == NULL) { printf("%s: bulk-in and/or bulk-out endpoint not found\n", sc->sc_dev.dv_xname); return; } sc->sc_bulkin = ed_bulkin->bEndpointAddress; sc->sc_bulkout = ed_bulkout->bEndpointAddress; } int uscanneropen(dev_t dev, int flag, int mode, struct proc *p) { struct uscanner_softc *sc; int unit = USCANNERUNIT(dev); usbd_status err; if (unit >= uscanner_cd.cd_ndevs) return (ENXIO); sc = uscanner_cd.cd_devs[unit]; if (sc == NULL) return (ENXIO); DPRINTFN(5, ("uscanneropen: flag=%d, mode=%d, unit=%d\n", flag, mode, unit)); if (sc->sc_dying) return (ENXIO); if (sc->sc_state & USCANNER_OPEN) return (EBUSY); sc->sc_state |= USCANNER_OPEN; sc->sc_bulkin_buffer = malloc(USCANNER_BUFFERSIZE, M_USBDEV, M_WAITOK); sc->sc_bulkout_buffer = malloc(USCANNER_BUFFERSIZE, M_USBDEV, M_WAITOK); /* No need to check buffers for NULL since we have WAITOK */ sc->sc_bulkin_bufferlen = USCANNER_BUFFERSIZE; sc->sc_bulkout_bufferlen = USCANNER_BUFFERSIZE; /* We have decided on which endpoints to use, now open the pipes */ if (sc->sc_bulkin_pipe == NULL) { err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin, USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); if (err) { printf("%s: cannot open bulk-in pipe (addr %d)\n", sc->sc_dev.dv_xname, sc->sc_bulkin); uscanner_do_close(sc); return (EIO); } } if (sc->sc_bulkout_pipe == NULL) { err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout, USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); if (err) { printf("%s: cannot open bulk-out pipe (addr %d)\n", sc->sc_dev.dv_xname, sc->sc_bulkout); uscanner_do_close(sc); return (EIO); } } sc->sc_bulkin_xfer = usbd_alloc_xfer(sc->sc_udev); if (sc->sc_bulkin_xfer == NULL) { uscanner_do_close(sc); return (ENOMEM); } sc->sc_bulkout_xfer = usbd_alloc_xfer(sc->sc_udev); if (sc->sc_bulkout_xfer == NULL) { uscanner_do_close(sc); return (ENOMEM); } return (0); /* success */ } int uscannerclose(dev_t dev, int flag, int mode, struct proc *p) { struct uscanner_softc *sc; sc = uscanner_cd.cd_devs[USCANNERUNIT(dev)]; DPRINTFN(5, ("uscannerclose: flag=%d, mode=%d, unit=%d\n", flag, mode, USCANNERUNIT(dev))); #ifdef DIAGNOSTIC if (!(sc->sc_state & USCANNER_OPEN)) { printf("uscannerclose: not open\n"); return (EINVAL); } #endif uscanner_do_close(sc); return (0); } void uscanner_do_close(struct uscanner_softc *sc) { if (sc->sc_bulkin_xfer) { usbd_free_xfer(sc->sc_bulkin_xfer); sc->sc_bulkin_xfer = NULL; } if (sc->sc_bulkout_xfer) { usbd_free_xfer(sc->sc_bulkout_xfer); sc->sc_bulkout_xfer = NULL; } if (!(sc->sc_dev_flags & USC_KEEP_OPEN)) { if (sc->sc_bulkin_pipe != NULL) { usbd_abort_pipe(sc->sc_bulkin_pipe); usbd_close_pipe(sc->sc_bulkin_pipe); sc->sc_bulkin_pipe = NULL; } if (sc->sc_bulkout_pipe != NULL) { usbd_abort_pipe(sc->sc_bulkout_pipe); usbd_close_pipe(sc->sc_bulkout_pipe); sc->sc_bulkout_pipe = NULL; } } if (sc->sc_bulkin_buffer) { free(sc->sc_bulkin_buffer, M_USBDEV); sc->sc_bulkin_buffer = NULL; } if (sc->sc_bulkout_buffer) { free(sc->sc_bulkout_buffer, M_USBDEV); sc->sc_bulkout_buffer = NULL; } sc->sc_state &= ~USCANNER_OPEN; } int uscanner_do_read(struct uscanner_softc *sc, struct uio *uio, int flag) { u_int32_t n, tn; usbd_status err; int error = 0; DPRINTFN(5, ("%s: uscannerread\n", sc->sc_dev.dv_xname)); if (sc->sc_dying) return (EIO); while ((n = min(sc->sc_bulkin_bufferlen, uio->uio_resid)) != 0) { DPRINTFN(1, ("uscannerread: start transfer %d bytes\n",n)); tn = n; err = usbd_bulk_transfer( sc->sc_bulkin_xfer, sc->sc_bulkin_pipe, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, sc->sc_bulkin_buffer, &tn, "uscnrb"); if (err) { if (err == USBD_INTERRUPTED) error = EINTR; else if (err == USBD_TIMEOUT) error = ETIMEDOUT; else error = EIO; break; } DPRINTFN(1, ("uscannerread: got %d bytes\n", tn)); error = uiomove(sc->sc_bulkin_buffer, tn, uio); if (error || tn < n) break; } return (error); } int uscannerread(dev_t dev, struct uio *uio, int flag) { struct uscanner_softc *sc; int error; sc = uscanner_cd.cd_devs[USCANNERUNIT(dev)]; sc->sc_refcnt++; error = uscanner_do_read(sc, uio, flag); if (--sc->sc_refcnt < 0) usb_detach_wakeup(&sc->sc_dev); return (error); } int uscanner_do_write(struct uscanner_softc *sc, struct uio *uio, int flag) { u_int32_t n; int error = 0; usbd_status err; DPRINTFN(5, ("%s: uscanner_do_write\n", sc->sc_dev.dv_xname)); if (sc->sc_dying) return (EIO); while ((n = min(sc->sc_bulkout_bufferlen, uio->uio_resid)) != 0) { error = uiomove(sc->sc_bulkout_buffer, n, uio); if (error) break; DPRINTFN(1, ("uscanner_do_write: transfer %d bytes\n", n)); err = usbd_bulk_transfer( sc->sc_bulkout_xfer, sc->sc_bulkout_pipe, 0, USBD_NO_TIMEOUT, sc->sc_bulkout_buffer, &n, "uscnwb"); if (err) { if (err == USBD_INTERRUPTED) error = EINTR; else error = EIO; break; } } return (error); } int uscannerwrite(dev_t dev, struct uio *uio, int flag) { struct uscanner_softc *sc; int error; sc = uscanner_cd.cd_devs[USCANNERUNIT(dev)]; sc->sc_refcnt++; error = uscanner_do_write(sc, uio, flag); if (--sc->sc_refcnt < 0) usb_detach_wakeup(&sc->sc_dev); return (error); } int uscanner_activate(struct device *self, int act) { struct uscanner_softc *sc = (struct uscanner_softc *)self; switch (act) { case DVACT_ACTIVATE: break; case DVACT_DEACTIVATE: sc->sc_dying = 1; break; } return (0); } int uscanner_detach(struct device *self, int flags) { struct uscanner_softc *sc = (struct uscanner_softc *)self; int s; int maj, mn; DPRINTF(("uscanner_detach: sc=%p flags=%d\n", sc, flags)); sc->sc_dev_flags = 0; /* make close really close device */ /* Abort all pipes. Causes processes waiting for transfer to wake. */ if (sc->sc_bulkin_pipe != NULL) usbd_abort_pipe(sc->sc_bulkin_pipe); if (sc->sc_bulkout_pipe != NULL) usbd_abort_pipe(sc->sc_bulkout_pipe); s = splusb(); if (--sc->sc_refcnt >= 0) { /* Wait for processes to go away. */ usb_detach_wait(&sc->sc_dev); } splx(s); /* locate the major number */ for (maj = 0; maj < nchrdev; maj++) if (cdevsw[maj].d_open == uscanneropen) break; /* Nuke the vnodes for any open instances (calls close). */ mn = self->dv_unit * USB_MAX_ENDPOINTS; vdevgone(maj, mn, mn + USB_MAX_ENDPOINTS - 1, VCHR); return (0); } int uscannerpoll(dev_t dev, int events, struct proc *p) { struct uscanner_softc *sc; int revents = 0; sc = uscanner_cd.cd_devs[USCANNERUNIT(dev)]; if (sc->sc_dying) return (POLLERR); /* * We have no easy way of determining if a read will * yield any data or a write will happen. * Pretend they will. */ revents |= events & (POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM); return (revents); } int uscannerioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) { return (EINVAL); } void filt_uscannerdetach(struct knote *); int uscannerkqfilter(dev_t, struct knote *); void filt_uscannerdetach(struct knote *kn) { struct uscanner_softc *sc = (void *)kn->kn_hook; SLIST_REMOVE(&sc->sc_selq.si_note, kn, knote, kn_selnext); } struct filterops uscanner_seltrue_filtops = { 1, NULL, filt_uscannerdetach, filt_seltrue }; int uscannerkqfilter(dev_t dev, struct knote *kn) { struct uscanner_softc *sc; struct klist *klist; sc = uscanner_cd.cd_devs[USCANNERUNIT(dev)]; if (sc->sc_dying) return (1); switch (kn->kn_filter) { case EVFILT_READ: case EVFILT_WRITE: /* * We have no easy way of determining if a read will * yield any data or a write will happen. * Pretend they will. */ klist = &sc->sc_selq.si_note; kn->kn_fop = &uscanner_seltrue_filtops; break; default: return (1); } kn->kn_hook = (void *)sc; SLIST_INSERT_HEAD(klist, kn, kn_selnext); return (0); }