/* $NetBSD: ulpt.c,v 1.107 2020/06/27 07:29:11 maxv Exp $ */ /* * Copyright (c) 1998, 2003 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. * * 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. */ /* * Printer Class spec: http://www.usb.org/developers/data/devclass/usbprint109.PDF */ #include __KERNEL_RCSID(0, "$NetBSD: ulpt.c,v 1.107 2020/06/27 07:29:11 maxv Exp $"); #ifdef _KERNEL_OPT #include "opt_usb.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include /* PAGE_SIZE */ #include #include #include #include #include #include "ioconf.h" #define TIMEOUT hz*16 /* wait up to 16 seconds for a ready */ #define STEP hz/4 #define LPTPRI (PZERO+8) #define ULPT_BSIZE PAGE_SIZE #define ULPT_READS_PER_SEC 5 /* XXX Why is 10 us a reasonable value? */ #define ULPT_READ_TIMO 10 #ifdef ULPT_DEBUG #define DPRINTFN(n,x) if (ulptdebug>=(n)) printf x int ulptdebug = 0; /* * The strategy for debug levels is: * 1: attach-time operations * 2: open/close/status/reset * 3: read/write basic * 4: read/write details * 10: left over from previous debug code */ #else #define DPRINTFN(n,x) #endif #define UR_GET_DEVICE_ID 0 #define UR_GET_PORT_STATUS 1 #define UR_SOFT_RESET 2 #define LPS_NERR 0x08 /* printer no error */ #define LPS_SELECT 0x10 /* printer selected */ #define LPS_NOPAPER 0x20 /* printer out of paper */ #define LPS_INVERT (LPS_SELECT|LPS_NERR) #define LPS_MASK (LPS_SELECT|LPS_NERR|LPS_NOPAPER) struct ulpt_softc { device_t sc_dev; struct usbd_device *sc_udev; /* device */ struct usbd_interface *sc_iface; /* interface */ int sc_ifaceno; int sc_out; struct usbd_pipe *sc_out_pipe; /* bulk out pipe */ struct usbd_xfer *sc_out_xfer; void *sc_out_buf; int sc_in; struct usbd_pipe *sc_in_pipe; /* bulk in pipe */ struct usbd_xfer *sc_in_xfer; void *sc_in_buf; struct callout sc_read_callout; /* to drain input on write-only opens */ int sc_has_callout; u_char sc_state; #define ULPT_OPEN 0x01 /* device is open */ #define ULPT_OBUSY 0x02 /* printer is busy doing output */ #define ULPT_INIT 0x04 /* waiting to initialize for open */ u_char sc_flags; #define ULPT_NOPRIME 0x40 /* don't prime on open */ u_char sc_laststatus; int sc_refcnt; u_char sc_dying; }; static dev_type_open(ulptopen); static dev_type_close(ulptclose); static dev_type_write(ulptwrite); static dev_type_read(ulptread); static dev_type_ioctl(ulptioctl); const struct cdevsw ulpt_cdevsw = { .d_open = ulptopen, .d_close = ulptclose, .d_read = ulptread, .d_write = ulptwrite, .d_ioctl = ulptioctl, .d_stop = nostop, .d_tty = notty, .d_poll = nopoll, .d_mmap = nommap, .d_kqfilter = nokqfilter, .d_discard = nodiscard, .d_flag = D_OTHER }; static int ulpt_do_write(struct ulpt_softc *, struct uio *, int); static int ulpt_do_read(struct ulpt_softc *, struct uio *, int); static int ulpt_status(struct ulpt_softc *); static void ulpt_reset(struct ulpt_softc *); static int ulpt_statusmsg(u_char, struct ulpt_softc *); static void ulpt_read_cb(struct usbd_xfer *, void *, usbd_status); static void ulpt_tick(void *xsc); #if 0 void ieee1284_print_id(char *); #endif #define ULPTUNIT(s) (minor(s) & 0x1f) #define ULPTFLAGS(s) (minor(s) & 0xe0) static int ulpt_match(device_t, cfdata_t, void *); static void ulpt_attach(device_t, device_t, void *); static int ulpt_detach(device_t, int); static int ulpt_activate(device_t, enum devact); CFATTACH_DECL_NEW(ulpt, sizeof(struct ulpt_softc), ulpt_match, ulpt_attach, ulpt_detach, ulpt_activate); static int ulpt_match(device_t parent, cfdata_t match, void *aux) { struct usbif_attach_arg *uiaa = aux; /* XXX Print something useful, or don't. */ DPRINTFN(10,("ulpt_match\n")); if (uiaa->uiaa_class == UICLASS_PRINTER && uiaa->uiaa_subclass == UISUBCLASS_PRINTER && (uiaa->uiaa_proto == UIPROTO_PRINTER_UNI || uiaa->uiaa_proto == UIPROTO_PRINTER_BI || uiaa->uiaa_proto == UIPROTO_PRINTER_1284)) return UMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO; return UMATCH_NONE; } static void ulpt_attach(device_t parent, device_t self, void *aux) { struct ulpt_softc *sc = device_private(self); struct usbif_attach_arg *uiaa = aux; struct usbd_device *dev = uiaa->uiaa_device; struct usbd_interface *iface = uiaa->uiaa_iface; usb_interface_descriptor_t *ifcd = usbd_get_interface_descriptor(iface); const usb_interface_descriptor_t *id; usbd_status err; char *devinfop; usb_endpoint_descriptor_t *ed; uint8_t epcount; int i, altno; usbd_desc_iter_t iter; sc->sc_dev = self; aprint_naive("\n"); aprint_normal("\n"); devinfop = usbd_devinfo_alloc(dev, 0); aprint_normal_dev(self, "%s, iclass %d/%d\n", devinfop, ifcd->bInterfaceClass, ifcd->bInterfaceSubClass); usbd_devinfo_free(devinfop); /* Loop through descriptors looking for a bidir mode. */ usb_desc_iter_init(dev, &iter); for (altno = 0;;) { id = (const usb_interface_descriptor_t *)usb_desc_iter_next(&iter); if (!id) break; if (id->bDescriptorType == UDESC_INTERFACE && id->bInterfaceNumber == ifcd->bInterfaceNumber) { if (id->bInterfaceClass == UICLASS_PRINTER && id->bInterfaceSubClass == UISUBCLASS_PRINTER && (id->bInterfaceProtocol == UIPROTO_PRINTER_BI /*|| id->bInterfaceProtocol == UIPROTO_PRINTER_1284*/)) goto found; altno++; } } id = ifcd; /* not found, use original */ found: if (id != ifcd) { /* Found a new bidir setting */ DPRINTFN(1, ("ulpt_attach: set altno = %d\n", altno)); err = usbd_set_interface(iface, altno); if (err) { aprint_error_dev(self, "setting alternate interface failed\n"); sc->sc_dying = 1; return; } } epcount = 0; (void)usbd_endpoint_count(iface, &epcount); sc->sc_in = -1; sc->sc_out = -1; for (i = 0; i < epcount; i++) { ed = usbd_interface2endpoint_descriptor(iface, i); if (ed == NULL) { aprint_error_dev(self, "couldn't get ep %d\n", i); return; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { sc->sc_in = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { sc->sc_out = ed->bEndpointAddress; } } if (sc->sc_out == -1) { aprint_error_dev(self, "could not find bulk out endpoint\n"); sc->sc_dying = 1; return; } if (usbd_get_quirks(dev)->uq_flags & UQ_BROKEN_BIDIR) { /* This device doesn't handle reading properly. */ sc->sc_in = -1; } aprint_normal_dev(self, "using %s-directional mode\n", sc->sc_in >= 0 ? "bi" : "uni"); sc->sc_iface = iface; sc->sc_ifaceno = id->bInterfaceNumber; sc->sc_udev = dev; #if 0 /* * This code is disabled because for some mysterious reason it causes * printing not to work. But only sometimes, and mostly with * UHCI and less often with OHCI. *sigh* */ { usb_config_descriptor_t *cd = usbd_get_config_descriptor(dev); usb_device_request_t req; int len, alen; req.bmRequestType = UT_READ_CLASS_INTERFACE; req.bRequest = UR_GET_DEVICE_ID; USETW(req.wValue, cd->bConfigurationValue); USETW2(req.wIndex, id->bInterfaceNumber, id->bAlternateSetting); USETW(req.wLength, DEVINFOSIZE - 1); err = usbd_do_request_flags(dev, &req, devinfop, USBD_SHORT_XFER_OK, &alen, USBD_DEFAULT_TIMEOUT); if (err) { printf("%s: cannot get device id\n", device_xname(sc->sc_dev)); } else if (alen <= 2) { printf("%s: empty device id, no printer connected?\n", device_xname(sc->sc_dev)); } else { /* devinfop now contains an IEEE-1284 device ID */ len = ((devinfop[0] & 0xff) << 8) | (devinfop[1] & 0xff); if (len > DEVINFOSIZE - 3) len = DEVINFOSIZE - 3; devinfop[len] = 0; printf("%s: device id <", device_xname(sc->sc_dev)); ieee1284_print_id(devinfop+2); printf(">\n"); } } #endif usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); DPRINTFN(1, ("ulpt_attach: sc=%p in=%d out=%d\n", sc, sc->sc_out, sc->sc_in)); return; } static int ulpt_activate(device_t self, enum devact act) { struct ulpt_softc *sc = device_private(self); switch (act) { case DVACT_DEACTIVATE: sc->sc_dying = 1; return 0; default: return EOPNOTSUPP; } } static int ulpt_detach(device_t self, int flags) { struct ulpt_softc *sc = device_private(self); int s; int maj, mn; DPRINTFN(1, ("ulpt_detach: sc=%p\n", sc)); sc->sc_dying = 1; if (sc->sc_out_pipe != NULL) usbd_abort_pipe(sc->sc_out_pipe); if (sc->sc_in_pipe != NULL) usbd_abort_pipe(sc->sc_in_pipe); s = splusb(); if (--sc->sc_refcnt >= 0) { /* There is noone to wake, aborting the pipe is enough */ /* Wait for processes to go away. */ usb_detach_waitold(sc->sc_dev); } splx(s); /* locate the major number */ maj = cdevsw_lookup_major(&ulpt_cdevsw); /* Nuke the vnodes for any open instances (calls close). */ mn = device_unit(self); vdevgone(maj, mn, mn, VCHR); vdevgone(maj, mn | ULPT_NOPRIME , mn | ULPT_NOPRIME, VCHR); if (sc->sc_udev != NULL) usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); return 0; } static int ulpt_status(struct ulpt_softc *sc) { usb_device_request_t req; usbd_status err; u_char status; req.bmRequestType = UT_READ_CLASS_INTERFACE; req.bRequest = UR_GET_PORT_STATUS; USETW(req.wValue, 0); USETW(req.wIndex, sc->sc_ifaceno); USETW(req.wLength, 1); err = usbd_do_request(sc->sc_udev, &req, &status); DPRINTFN(2, ("ulpt_status: status=0x%02x err=%d\n", status, err)); if (!err) return status; else return 0; } static void ulpt_reset(struct ulpt_softc *sc) { usb_device_request_t req; DPRINTFN(2, ("ulpt_reset\n")); req.bRequest = UR_SOFT_RESET; USETW(req.wValue, 0); USETW(req.wIndex, sc->sc_ifaceno); USETW(req.wLength, 0); /* * There was a mistake in the USB printer 1.0 spec that gave the * request type as UT_WRITE_CLASS_OTHER; it should have been * UT_WRITE_CLASS_INTERFACE. Many printers use the old one, * so we try both. */ req.bmRequestType = UT_WRITE_CLASS_OTHER; if (usbd_do_request(sc->sc_udev, &req, 0)) { /* 1.0 */ req.bmRequestType = UT_WRITE_CLASS_INTERFACE; (void)usbd_do_request(sc->sc_udev, &req, 0); /* 1.1 */ } } int ulptusein = 1; /* * Reset the printer, then wait until it's selected and not busy. */ static int ulptopen(dev_t dev, int flag, int mode, struct lwp *l) { u_char flags = ULPTFLAGS(dev); struct ulpt_softc *sc; usbd_status err; int spin, error; sc = device_lookup_private(&ulpt_cd, ULPTUNIT(dev)); if (sc == NULL) return ENXIO; if (sc == NULL || sc->sc_iface == NULL || sc->sc_dying) return ENXIO; if (sc->sc_state) return EBUSY; sc->sc_state = ULPT_INIT; sc->sc_flags = flags; DPRINTFN(2, ("ulptopen: flags=%#x\n", (unsigned)flags)); error = 0; sc->sc_refcnt++; if ((flags & ULPT_NOPRIME) == 0) ulpt_reset(sc); for (spin = 0; (ulpt_status(sc) & LPS_SELECT) == 0; spin += STEP) { DPRINTFN(2, ("ulpt_open: waiting a while\n")); if (spin >= TIMEOUT) { error = EBUSY; sc->sc_state = 0; goto done; } /* wait 1/4 second, give up if we get a signal */ error = kpause("ulptop", true, STEP, NULL); if (error != EWOULDBLOCK) { sc->sc_state = 0; goto done; } if (sc->sc_dying) { error = ENXIO; sc->sc_state = 0; goto done; } } err = usbd_open_pipe(sc->sc_iface, sc->sc_out, 0, &sc->sc_out_pipe); if (err) { error = EIO; goto err0; } error = usbd_create_xfer(sc->sc_out_pipe, ULPT_BSIZE, 0, 0, &sc->sc_out_xfer); if (error) goto err2; sc->sc_out_buf = usbd_get_buffer(sc->sc_out_xfer); if (ulptusein && sc->sc_in != -1) { DPRINTFN(2, ("ulpt_open: opening input pipe %d\n", sc->sc_in)); err = usbd_open_pipe(sc->sc_iface, sc->sc_in,0,&sc->sc_in_pipe); if (err) { error = EIO; goto err2; } error = usbd_create_xfer(sc->sc_in_pipe, ULPT_BSIZE, 0, 0, &sc->sc_in_xfer); if (error) goto err3; sc->sc_in_buf = usbd_get_buffer(sc->sc_in_xfer); /* If it's not opened for read then set up a reader. */ if (!(flag & FREAD)) { DPRINTFN(2, ("ulpt_open: start read callout\n")); callout_init(&sc->sc_read_callout, 0); callout_reset(&sc->sc_read_callout, hz/5, ulpt_tick, sc); sc->sc_has_callout = 1; } } sc->sc_state = ULPT_OPEN; goto done; err3: usbd_close_pipe(sc->sc_in_pipe); sc->sc_in_pipe = NULL; err2: usbd_destroy_xfer(sc->sc_out_xfer); sc->sc_out_xfer = NULL; usbd_close_pipe(sc->sc_out_pipe); sc->sc_out_pipe = NULL; err0: sc->sc_state = 0; done: if (--sc->sc_refcnt < 0) usb_detach_wakeupold(sc->sc_dev); DPRINTFN(2, ("ulptopen: done, error=%d\n", error)); return error; } /* * XXX Document return value semantics. */ static int ulpt_statusmsg(u_char status, struct ulpt_softc *sc) { u_char new; status = (status ^ LPS_INVERT) & LPS_MASK; new = status & ~sc->sc_laststatus; sc->sc_laststatus = status; if (new & LPS_SELECT) log(LOG_NOTICE, "%s: offline\n", device_xname(sc->sc_dev)); if (new & LPS_NOPAPER) log(LOG_NOTICE, "%s: out of paper\n", device_xname(sc->sc_dev)); if (new & LPS_NERR) log(LOG_NOTICE, "%s: output error\n", device_xname(sc->sc_dev)); return status; } static int ulptclose(dev_t dev, int flag, int mode, struct lwp *l) { struct ulpt_softc *sc; sc = device_lookup_private(&ulpt_cd, ULPTUNIT(dev)); if (sc->sc_state != ULPT_OPEN) /* We are being forced to close before the open completed. */ return 0; if (sc->sc_has_callout) { DPRINTFN(2, ("ulptclose: stopping read callout\n")); callout_halt(&sc->sc_read_callout, NULL); callout_destroy(&sc->sc_read_callout); sc->sc_has_callout = 0; } if (sc->sc_out_pipe != NULL) { usbd_abort_pipe(sc->sc_out_pipe); } if (sc->sc_out_xfer != NULL) { usbd_destroy_xfer(sc->sc_out_xfer); sc->sc_out_xfer = NULL; } if (sc->sc_out_pipe != NULL) { usbd_close_pipe(sc->sc_out_pipe); sc->sc_out_pipe = NULL; } if (sc->sc_in_pipe != NULL) { usbd_abort_pipe(sc->sc_in_pipe); } if (sc->sc_in_xfer != NULL) { usbd_destroy_xfer(sc->sc_in_xfer); sc->sc_in_xfer = NULL; } if (sc->sc_in_pipe != NULL) { usbd_close_pipe(sc->sc_in_pipe); sc->sc_in_pipe = NULL; } sc->sc_state = 0; DPRINTFN(2, ("ulptclose: closed\n")); return 0; } static int ulpt_do_write(struct ulpt_softc *sc, struct uio *uio, int flags) { uint32_t n; int error = 0; void *bufp; struct usbd_xfer *xfer; usbd_status err; DPRINTFN(3, ("ulptwrite\n")); xfer = sc->sc_out_xfer; bufp = sc->sc_out_buf; while ((n = uimin(ULPT_BSIZE, uio->uio_resid)) != 0) { ulpt_statusmsg(ulpt_status(sc), sc); error = uiomove(bufp, n, uio); if (error) break; DPRINTFN(4, ("ulptwrite: transfer %d bytes\n", n)); err = usbd_bulk_transfer(xfer, sc->sc_out_pipe, 0, USBD_NO_TIMEOUT, bufp, &n); if (err) { DPRINTFN(3, ("ulptwrite: error=%d\n", err)); error = EIO; break; } } return error; } static int ulptwrite(dev_t dev, struct uio *uio, int flags) { struct ulpt_softc *sc; int error; sc = device_lookup_private(&ulpt_cd, ULPTUNIT(dev)); if (sc->sc_dying) return EIO; sc->sc_refcnt++; error = ulpt_do_write(sc, uio, flags); if (--sc->sc_refcnt < 0) usb_detach_wakeupold(sc->sc_dev); return error; } /* * Perform a read operation according to the given uio. * This should respect nonblocking I/O status. * * XXX Doing a short read when more data is available seems to be * problematic. See * http://www.freebsd.org/cgi/query-pr.cgi?pr=91538&cat= for a fix. * However, this will be unnecessary given a proper fix for the next * problem, and most actual callers read a lot. * * XXX This code should interact properly with select/poll, and that * requires the USB transactions to be queued and function before the * user does a read. Read will then consume data from a buffer, and * not interact with the device. See ucom.c for an example of how to * do this. */ static int ulpt_do_read(struct ulpt_softc *sc, struct uio *uio, int flags) { uint32_t n, nread, nreq; int error = 0, nonblocking, timeout; void *bufp; struct usbd_xfer *xfer; usbd_status err = USBD_NORMAL_COMPLETION; /* XXX Resolve with background reader process. KASSERT? */ if (sc->sc_in_pipe == NULL) return EIO; if (flags & IO_NDELAY) nonblocking = 1; else nonblocking = 0; if (nonblocking) timeout = USBD_DEFAULT_TIMEOUT; /* 5 ms */ else timeout = USBD_NO_TIMEOUT; DPRINTFN(3, ("ulptread nonblocking=%d uio_reside=%ld timeout=%d\n", nonblocking, (u_long)uio->uio_resid, timeout)); xfer = sc->sc_in_xfer; bufp = sc->sc_in_buf; nread = 0; while ((nreq = uimin(ULPT_BSIZE, uio->uio_resid)) != 0) { KASSERT(error == 0); if (error != 0) { printf("ulptread: pre-switch error %d != 0", error); goto done; } /* * XXX Even with the short timeout, this will sleep, * but it should be adequately prompt in practice. */ n = nreq; DPRINTFN(4, ("ulptread: transfer %d bytes, nonblocking=%d timeout=%d\n", n, nonblocking, timeout)); err = usbd_bulk_transfer(xfer, sc->sc_in_pipe, USBD_SHORT_XFER_OK, timeout, bufp, &n); DPRINTFN(4, ("ulptread: transfer complete nreq %d n %d nread %d err %d\n", nreq, n, nread, err)); /* * Process "err" return, jumping to done if we set "error". */ switch (err) { case USBD_NORMAL_COMPLETION: if (n == 0) { DPRINTFN(3, ("ulptread: NORMAL n==0\n")); } break; case USBD_SHORT_XFER: /* We said SHORT_XFER_OK, so shouldn't happen. */ DPRINTFN(3, ("ulptread: SHORT n=%d\n", n)); break; case USBD_TIMEOUT: if (nonblocking == 0) { /* XXX Cannot happen; perhaps KASSERT. */ printf("ulptread: timeout in blocking mode\n"); error = EIO; goto done; } DPRINTFN(3, ("ulptread: TIMEOUT n %d nread %d error %d\n", n, nread, error)); /* * Don't set error until we understand why * this happens. */ break; case USBD_INTERRUPTED: /* * The sleep in usbd_bulk_transfer was * interrupted. Reflect it to the caller so * that reading can be interrupted. */ error = EINTR; DPRINTFN(3, ("ulptread: EINTR error %d\n", error)); goto done; break; default: /* Assume all other return codes are really errors. */ error = EIO; DPRINTFN(3, ("ulptread: n %d err %d error %d\n", n, err, error)); goto done; break; } /* XXX KASSERT */ if (error != 0) { printf("ulptread: post-switch error %d != 0", error); goto done; } if (n > 0) { /* * Record progress to enable later choosing * between short reads and EWOULDBLOCK. */ nread += n; /* Copy to userspace, giving up on any error. */ error = uiomove(bufp, n, uio); if (error != 0) break; } else { /* * We read 0 bytes, and therefore are done, * even if we aren't in nonblocking mode. */ if (error == 0 && nread == 0) error = EWOULDBLOCK; DPRINTFN(3, ("ulptread: read 0=>done error %d\n", error)); goto done; } /* * A short transfer indicates no more data will be * forthcoming. Terminate this read regardless of * whether we are in nonblocking mode. XXX Reconsider * for blocking mode; maybe we should continue to * block, but maybe it just doesn't make senes to do * blocking reads from devices like this. */ if (err == USBD_SHORT_XFER) { DPRINTFN(3, ("ulptread: SHORT=>done n %d nread %d err %d error %d\n", n, nread, err, error)); break; } } done: DPRINTFN(3, ("ulptread: finished n %d nread %d err %d error %d\n", n, nread, err, error)); return error; } static int ulptread(dev_t dev, struct uio *uio, int flags) { struct ulpt_softc *sc; int error; sc = device_lookup_private(&ulpt_cd, ULPTUNIT(dev)); if (sc->sc_dying) return EIO; sc->sc_refcnt++; error = ulpt_do_read(sc, uio, flags); if (--sc->sc_refcnt < 0) usb_detach_wakeupold(sc->sc_dev); return error; } static void ulpt_read_cb(struct usbd_xfer *xfer, void *priv, usbd_status status) { usbd_status err; uint32_t n; void *xsc; struct ulpt_softc *sc; usbd_get_xfer_status(xfer, &xsc, NULL, &n, &err); sc = xsc; DPRINTFN(4, ("ulpt_read_cb: start sc=%p, err=%d n=%d\n", sc, err, n)); #ifdef ULPT_DEBUG if (!err && n > 0) DPRINTFN(3, ("ulpt_tick: discarding %d bytes\n", n)); #endif if (!err || err == USBD_TIMEOUT) callout_reset(&sc->sc_read_callout, hz / ULPT_READS_PER_SEC, ulpt_tick, sc); } /* * For devices which are not opened for reading, this function is * called continuously to start read bulk transfers to avoid the * printer overflowing its output buffer. * * XXX This should be adapted for continuous reads to allow select to * work; see do_ulpt_read(). */ static void ulpt_tick(void *xsc) { struct ulpt_softc *sc = xsc; usbd_status err __unused; if (sc == NULL || sc->sc_dying) return; usbd_setup_xfer(sc->sc_in_xfer, sc, sc->sc_in_buf, ULPT_BSIZE, USBD_SHORT_XFER_OK, ULPT_READ_TIMO, ulpt_read_cb); err = usbd_transfer(sc->sc_in_xfer); DPRINTFN(3, ("ulpt_tick: sc=%p err=%d\n", sc, err)); } static int ulptioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { #if 0 struct ulpt_softc *sc; sc = device_lookup_private(&ulpt_cd, ULPTUNIT(dev)); #endif switch (cmd) { case FIONBIO: return 0; } return ENODEV; } #if 0 /* XXX This does not belong here. */ /* * Print select parts of a IEEE 1284 device ID. */ void ieee1284_print_id(char *str) { char *p, *q; for (p = str-1; p; p = strchr(p, ';')) { p++; /* skip ';' */ if (strncmp(p, "MFG:", 4) == 0 || strncmp(p, "MANUFACTURER:", 14) == 0 || strncmp(p, "MDL:", 4) == 0 || strncmp(p, "MODEL:", 6) == 0) { q = strchr(p, ';'); if (q) printf("%.*s", (int)(q - p + 1), p); } } } #endif