/* $NetBSD: umodem.c,v 1.45 2002/09/23 05:51:23 simonb Exp $ */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); /*- * Copyright (c) 2003, M. Warner Losh <imp@freebsd.org>. * All rights reserved. * * 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 AUTHOR 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 AUTHOR 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. */ /* * Copyright (c) 1998 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. * 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 prior 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. */ /* * Comm Class spec: http://www.usb.org/developers/data/devclass/usbcdc10.pdf * http://www.usb.org/developers/data/devclass/usbcdc11.pdf */ /* * TODO: * - Add error recovery in various places; the big problem is what * to do in a callback if there is an error. * - Implement a Call Device for modems without multiplexed commands. * */ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/ioccom.h> #include <sys/conf.h> #include <sys/tty.h> #include <sys/file.h> #include <sys/select.h> #include <sys/sysctl.h> #include <sys/proc.h> #include <sys/vnode.h> #include <sys/bus.h> #include <sys/poll.h> #include <dev/usb/usb.h> #include <dev/usb/usbcdc.h> #include <dev/usb/usbdi.h> #include <dev/usb/usbdi_util.h> #include <dev/usb/usbdevs.h> #include <dev/usb/usb_quirks.h> #include <dev/usb/usbdevs.h> #include <dev/usb/ucomvar.h> #ifdef USB_DEBUG int umodemdebug = 0; SYSCTL_NODE(_hw_usb, OID_AUTO, umodem, CTLFLAG_RW, 0, "USB umodem"); SYSCTL_INT(_hw_usb_umodem, OID_AUTO, debug, CTLFLAG_RW, &umodemdebug, 0, "umodem debug level"); #define DPRINTFN(n, x) if (umodemdebug > (n)) logprintf x #else #define DPRINTFN(n, x) #endif #define DPRINTF(x) DPRINTFN(0, x) /* * These are the maximum number of bytes transferred per frame. * If some really high speed devices should use this driver they * may need to be increased, but this is good enough for normal modems. */ #define UMODEMIBUFSIZE 64 #define UMODEMOBUFSIZE 256 #define UMODEM_MODVER 1 /* module version */ struct umodem_softc { struct ucom_softc sc_ucom; USBBASEDEVICE sc_dev; /* base device */ usbd_device_handle sc_udev; /* USB device */ int sc_ctl_iface_no; usbd_interface_handle sc_ctl_iface; /* control interface */ int sc_data_iface_no; usbd_interface_handle sc_data_iface; /* data interface */ int sc_cm_cap; /* CM capabilities */ int sc_acm_cap; /* ACM capabilities */ int sc_cm_over_data; usb_cdc_line_state_t sc_line_state; /* current line state */ u_char sc_dtr; /* current DTR state */ u_char sc_rts; /* current RTS state */ u_char sc_opening; /* lock during open */ int sc_ctl_notify; /* Notification endpoint */ usbd_pipe_handle sc_notify_pipe; /* Notification pipe */ usb_cdc_notification_t sc_notify_buf; /* Notification structure */ u_char sc_lsr; /* Local status register */ u_char sc_msr; /* Modem status register */ }; Static void *umodem_get_desc(usbd_device_handle dev, int type, int subtype); Static usbd_status umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state); Static usbd_status umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state); Static void umodem_get_caps(usbd_device_handle, int *, int *); Static void umodem_get_status(void *, int portno, u_char *lsr, u_char *msr); Static void umodem_set(void *, int, int, int); Static void umodem_dtr(struct umodem_softc *, int); Static void umodem_rts(struct umodem_softc *, int); Static void umodem_break(struct umodem_softc *, int); Static void umodem_set_line_state(struct umodem_softc *); Static int umodem_param(void *, int, struct termios *); Static int umodem_ioctl(void *, int, u_long, caddr_t, int, usb_proc_ptr ); Static int umodem_open(void *, int portno); Static void umodem_close(void *, int portno); Static void umodem_intr(usbd_xfer_handle, usbd_private_handle, usbd_status); Static struct ucom_callback umodem_callback = { umodem_get_status, umodem_set, umodem_param, umodem_ioctl, umodem_open, umodem_close, NULL, NULL, }; Static device_probe_t umodem_match; Static device_attach_t umodem_attach; Static device_detach_t umodem_detach; Static device_method_t umodem_methods[] = { /* Device interface */ DEVMETHOD(device_probe, umodem_match), DEVMETHOD(device_attach, umodem_attach), DEVMETHOD(device_detach, umodem_detach), { 0, 0 } }; Static driver_t umodem_driver = { "ucom", umodem_methods, sizeof (struct umodem_softc) }; DRIVER_MODULE(umodem, uhub, umodem_driver, ucom_devclass, usbd_driver_load, 0); MODULE_DEPEND(umodem, usb, 1, 1, 1); MODULE_DEPEND(umodem, ucom, UCOM_MINVER, UCOM_PREFVER, UCOM_MAXVER); MODULE_VERSION(umodem, UMODEM_MODVER); USB_MATCH(umodem) { USB_MATCH_START(umodem, uaa); usb_interface_descriptor_t *id; int cm, acm; if (uaa->iface == NULL) return (UMATCH_NONE); id = usbd_get_interface_descriptor(uaa->iface); if (id == NULL || id->bInterfaceClass != UICLASS_CDC || id->bInterfaceSubClass != UISUBCLASS_ABSTRACT_CONTROL_MODEL || id->bInterfaceProtocol != UIPROTO_CDC_AT) return (UMATCH_NONE); umodem_get_caps(uaa->device, &cm, &acm); if (!(cm & USB_CDC_CM_DOES_CM) || !(cm & USB_CDC_CM_OVER_DATA) || !(acm & USB_CDC_ACM_HAS_LINE)) return (UMATCH_NONE); return (UMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO); } USB_ATTACH(umodem) { USB_ATTACH_START(umodem, sc, uaa); usbd_device_handle dev = uaa->device; usb_interface_descriptor_t *id; usb_endpoint_descriptor_t *ed; usb_cdc_cm_descriptor_t *cmd; char *devinfo = NULL; const char *devname; usbd_status err; int data_ifcno; int i; struct ucom_softc *ucom; devinfo = malloc(1024, M_USBDEV, M_WAITOK); usbd_devinfo(dev, 0, devinfo); ucom = &sc->sc_ucom; ucom->sc_dev = self; sc->sc_dev = self; device_set_desc_copy(self, devinfo); ucom->sc_udev = dev; ucom->sc_iface = uaa->iface; /*USB_ATTACH_SETUP; */ sc->sc_udev = dev; sc->sc_ctl_iface = uaa->iface; devname = USBDEVNAME(sc->sc_dev); /* XXX ? use something else ? XXX */ id = usbd_get_interface_descriptor(sc->sc_ctl_iface); printf("%s: %s, iclass %d/%d\n", devname, devinfo, id->bInterfaceClass, id->bInterfaceSubClass); sc->sc_ctl_iface_no = id->bInterfaceNumber; umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap); /* Get the data interface no. */ cmd = umodem_get_desc(dev, UDESC_CS_INTERFACE, UDESCSUB_CDC_CM); if (cmd == NULL) { printf("%s: no CM descriptor\n", devname); goto bad; } sc->sc_data_iface_no = data_ifcno = cmd->bDataInterface; printf("%s: data interface %d, has %sCM over data, has %sbreak\n", devname, data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ", sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no "); /* Get the data interface too. */ for (i = 0; i < uaa->nifaces; i++) { if (uaa->ifaces[i] != NULL) { id = usbd_get_interface_descriptor(uaa->ifaces[i]); if (id != NULL && id->bInterfaceNumber == data_ifcno) { sc->sc_data_iface = uaa->ifaces[i]; uaa->ifaces[i] = NULL; } } } if (sc->sc_data_iface == NULL) { printf("%s: no data interface\n", devname); goto bad; } ucom->sc_iface = sc->sc_data_iface; /* * Find the bulk endpoints. * Iterate over all endpoints in the data interface and take note. */ ucom->sc_bulkin_no = ucom->sc_bulkout_no = -1; id = usbd_get_interface_descriptor(sc->sc_data_iface); for (i = 0; i < id->bNumEndpoints; i++) { ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i); if (ed == NULL) { printf("%s: no endpoint descriptor for %d\n", devname, i); goto bad; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { ucom->sc_bulkin_no = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { ucom->sc_bulkout_no = ed->bEndpointAddress; } } if (ucom->sc_bulkin_no == -1) { printf("%s: Could not find data bulk in\n", devname); goto bad; } if (ucom->sc_bulkout_no == -1) { printf("%s: Could not find data bulk out\n", devname); goto bad; } if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { DPRINTF(("Quirk says to assume CM over data\n")); sc->sc_cm_over_data = 1; } else { if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) { if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE) err = umodem_set_comm_feature(sc, UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED); else err = 0; if (err) { printf("%s: could not set data multiplex mode\n", devname); goto bad; } sc->sc_cm_over_data = 1; } } /* * The standard allows for notification messages (to indicate things * like a modem hangup) to come in via an interrupt endpoint * off of the control interface. Iterate over the endpoints on * the control interface and see if there are any interrupt * endpoints; if there are, then register it. */ sc->sc_ctl_notify = -1; sc->sc_notify_pipe = NULL; for (i = 0; i < id->bNumEndpoints; i++) { ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); if (ed == NULL) continue; if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { printf("%s: status change notification available\n", devname); sc->sc_ctl_notify = ed->bEndpointAddress; } } sc->sc_dtr = -1; ucom->sc_parent = sc; ucom->sc_portno = UCOM_UNK_PORTNO; /* bulkin, bulkout set above */ ucom->sc_ibufsize = UMODEMIBUFSIZE; ucom->sc_obufsize = UMODEMOBUFSIZE; ucom->sc_ibufsizepad = UMODEMIBUFSIZE; ucom->sc_opkthdrlen = 0; ucom->sc_callback = &umodem_callback; ucom_attach(&sc->sc_ucom); free(devinfo, M_USBDEV); USB_ATTACH_SUCCESS_RETURN; bad: ucom->sc_dying = 1; free(devinfo, M_USBDEV); USB_ATTACH_ERROR_RETURN; } Static int umodem_open(void *addr, int portno) { struct umodem_softc *sc = addr; int err; DPRINTF(("umodem_open: sc=%p\n", sc)); if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) { err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify, USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc, &sc->sc_notify_buf, sizeof(sc->sc_notify_buf), umodem_intr, USBD_DEFAULT_INTERVAL); if (err) { DPRINTF(("Failed to establish notify pipe: %s\n", usbd_errstr(err))); return EIO; } } return 0; } Static void umodem_close(void *addr, int portno) { struct umodem_softc *sc = addr; int err; DPRINTF(("umodem_close: sc=%p\n", sc)); if (sc->sc_notify_pipe != NULL) { err = usbd_abort_pipe(sc->sc_notify_pipe); if (err) printf("%s: abort notify pipe failed: %s\n", USBDEVNAME(sc->sc_dev), usbd_errstr(err)); err = usbd_close_pipe(sc->sc_notify_pipe); if (err) printf("%s: close notify pipe failed: %s\n", USBDEVNAME(sc->sc_dev), usbd_errstr(err)); sc->sc_notify_pipe = NULL; } } Static void umodem_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status) { struct umodem_softc *sc = priv; u_char mstatus; if (sc->sc_ucom.sc_dying) return; if (status != USBD_NORMAL_COMPLETION) { if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) return; printf("%s: abnormal status: %s\n", USBDEVNAME(sc->sc_dev), usbd_errstr(status)); return; } if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) { DPRINTF(("%s: unknown message type (%02x) on notify pipe\n", USBDEVNAME(sc->sc_dev), sc->sc_notify_buf.bmRequestType)); return; } switch (sc->sc_notify_buf.bNotification) { case UCDC_N_SERIAL_STATE: /* * Set the serial state in ucom driver based on * the bits from the notify message */ if (UGETW(sc->sc_notify_buf.wLength) != 2) { printf("%s: Invalid notification length! (%d)\n", USBDEVNAME(sc->sc_dev), UGETW(sc->sc_notify_buf.wLength)); break; } DPRINTF(("%s: notify bytes = %02x%02x\n", USBDEVNAME(sc->sc_dev), sc->sc_notify_buf.data[0], sc->sc_notify_buf.data[1])); /* Currently, lsr is always zero. */ sc->sc_lsr = sc->sc_msr = 0; mstatus = sc->sc_notify_buf.data[0]; if (ISSET(mstatus, UCDC_N_SERIAL_RI)) sc->sc_msr |= UMSR_RI; if (ISSET(mstatus, UCDC_N_SERIAL_DSR)) sc->sc_msr |= UMSR_DSR; if (ISSET(mstatus, UCDC_N_SERIAL_DCD)) sc->sc_msr |= UMSR_DCD; ucom_status_change(&sc->sc_ucom); break; default: DPRINTF(("%s: unknown notify message: %02x\n", USBDEVNAME(sc->sc_dev), sc->sc_notify_buf.bNotification)); break; } } void umodem_get_caps(usbd_device_handle dev, int *cm, int *acm) { usb_cdc_cm_descriptor_t *cmd; usb_cdc_acm_descriptor_t *cad; *cm = *acm = 0; cmd = umodem_get_desc(dev, UDESC_CS_INTERFACE, UDESCSUB_CDC_CM); if (cmd == NULL) { DPRINTF(("umodem_get_desc: no CM desc\n")); return; } *cm = cmd->bmCapabilities; cad = umodem_get_desc(dev, UDESC_CS_INTERFACE, UDESCSUB_CDC_ACM); if (cad == NULL) { DPRINTF(("umodem_get_desc: no ACM desc\n")); return; } *acm = cad->bmCapabilities; } void umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr) { struct umodem_softc *sc = addr; DPRINTF(("umodem_get_status:\n")); if (lsr != NULL) *lsr = sc->sc_lsr; if (msr != NULL) *msr = sc->sc_msr; } int umodem_param(void *addr, int portno, struct termios *t) { struct umodem_softc *sc = addr; usbd_status err; usb_cdc_line_state_t ls; DPRINTF(("umodem_param: sc=%p\n", sc)); USETDW(ls.dwDTERate, t->c_ospeed); if (ISSET(t->c_cflag, CSTOPB)) ls.bCharFormat = UCDC_STOP_BIT_2; else ls.bCharFormat = UCDC_STOP_BIT_1; if (ISSET(t->c_cflag, PARENB)) { if (ISSET(t->c_cflag, PARODD)) ls.bParityType = UCDC_PARITY_ODD; else ls.bParityType = UCDC_PARITY_EVEN; } else ls.bParityType = UCDC_PARITY_NONE; switch (ISSET(t->c_cflag, CSIZE)) { case CS5: ls.bDataBits = 5; break; case CS6: ls.bDataBits = 6; break; case CS7: ls.bDataBits = 7; break; case CS8: ls.bDataBits = 8; break; } err = umodem_set_line_coding(sc, &ls); if (err) { DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); return (ENOTTY); } return (0); } int umodem_ioctl(void *addr, int portno, u_long cmd, caddr_t data, int flag, usb_proc_ptr p) { struct umodem_softc *sc = addr; int error = 0; if (sc->sc_ucom.sc_dying) return (EIO); DPRINTF(("umodemioctl: cmd=0x%08lx\n", cmd)); switch (cmd) { case USB_GET_CM_OVER_DATA: *(int *)data = sc->sc_cm_over_data; break; case USB_SET_CM_OVER_DATA: if (*(int *)data != sc->sc_cm_over_data) { /* XXX change it */ } break; default: DPRINTF(("umodemioctl: unknown\n")); error = ENOTTY; break; } return (error); } void umodem_dtr(struct umodem_softc *sc, int onoff) { DPRINTF(("umodem_modem: onoff=%d\n", onoff)); if (sc->sc_dtr == onoff) return; sc->sc_dtr = onoff; umodem_set_line_state(sc); } void umodem_rts(struct umodem_softc *sc, int onoff) { DPRINTF(("umodem_modem: onoff=%d\n", onoff)); if (sc->sc_rts == onoff) return; sc->sc_rts = onoff; umodem_set_line_state(sc); } void umodem_set_line_state(struct umodem_softc *sc) { usb_device_request_t req; int ls; ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | (sc->sc_rts ? UCDC_LINE_RTS : 0); req.bmRequestType = UT_WRITE_CLASS_INTERFACE; req.bRequest = UCDC_SET_CONTROL_LINE_STATE; USETW(req.wValue, ls); USETW(req.wIndex, sc->sc_ctl_iface_no); USETW(req.wLength, 0); (void)usbd_do_request(sc->sc_udev, &req, 0); } void umodem_break(struct umodem_softc *sc, int onoff) { usb_device_request_t req; DPRINTF(("umodem_break: onoff=%d\n", onoff)); if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) return; req.bmRequestType = UT_WRITE_CLASS_INTERFACE; req.bRequest = UCDC_SEND_BREAK; USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); USETW(req.wIndex, sc->sc_ctl_iface_no); USETW(req.wLength, 0); (void)usbd_do_request(sc->sc_udev, &req, 0); } void umodem_set(void *addr, int portno, int reg, int onoff) { struct umodem_softc *sc = addr; switch (reg) { case UCOM_SET_DTR: umodem_dtr(sc, onoff); break; case UCOM_SET_RTS: umodem_rts(sc, onoff); break; case UCOM_SET_BREAK: umodem_break(sc, onoff); break; default: break; } } usbd_status umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) { usb_device_request_t req; usbd_status err; DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", UGETDW(state->dwDTERate), state->bCharFormat, state->bParityType, state->bDataBits)); if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { DPRINTF(("umodem_set_line_coding: already set\n")); return (USBD_NORMAL_COMPLETION); } req.bmRequestType = UT_WRITE_CLASS_INTERFACE; req.bRequest = UCDC_SET_LINE_CODING; USETW(req.wValue, 0); USETW(req.wIndex, sc->sc_ctl_iface_no); USETW(req.wLength, UCDC_LINE_STATE_LENGTH); err = usbd_do_request(sc->sc_udev, &req, state); if (err) { DPRINTF(("umodem_set_line_coding: failed, err=%s\n", usbd_errstr(err))); return (err); } sc->sc_line_state = *state; return (USBD_NORMAL_COMPLETION); } void * umodem_get_desc(usbd_device_handle dev, int type, int subtype) { usb_descriptor_t *desc; usb_config_descriptor_t *cd = usbd_get_config_descriptor(dev); uByte *p = (uByte *)cd; uByte *end = p + UGETW(cd->wTotalLength); while (p < end) { desc = (usb_descriptor_t *)p; if (desc->bDescriptorType == type && desc->bDescriptorSubtype == subtype) return (desc); p += desc->bLength; } return (0); } usbd_status umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) { usb_device_request_t req; usbd_status err; usb_cdc_abstract_state_t ast; DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, state)); req.bmRequestType = UT_WRITE_CLASS_INTERFACE; req.bRequest = UCDC_SET_COMM_FEATURE; USETW(req.wValue, feature); USETW(req.wIndex, sc->sc_ctl_iface_no); USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); USETW(ast.wState, state); err = usbd_do_request(sc->sc_udev, &req, &ast); if (err) { DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", feature, usbd_errstr(err))); return (err); } return (USBD_NORMAL_COMPLETION); } USB_DETACH(umodem) { USB_DETACH_START(umodem, sc); int rv = 0; DPRINTF(("umodem_detach: sc=%p\n", sc)); if (sc->sc_notify_pipe != NULL) { usbd_abort_pipe(sc->sc_notify_pipe); usbd_close_pipe(sc->sc_notify_pipe); sc->sc_notify_pipe = NULL; } sc->sc_ucom.sc_dying = 1; rv = ucom_detach(&sc->sc_ucom); return (rv); }