/* $OpenBSD: umodem.c,v 1.7 2001/05/03 02:20:34 aaron Exp $ */ /* $NetBSD: umodem.c,v 1.40 2001/03/25 23:02:34 augustss Exp $ */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef UMODEM_DEBUG #define DPRINTFN(n, x) if (umodemdebug > (n)) logprintf x int umodemdebug = 0; #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 struct umodem_softc { 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 */ device_ptr_t sc_subdev; /* ucom device */ u_char sc_opening; /* lock during open */ u_char sc_dying; /* disconnecting */ 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, struct proc *); 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_methods umodem_methods = { umodem_get_status, umodem_set, umodem_param, umodem_ioctl, umodem_open, umodem_close, NULL, NULL, }; USB_DECLARE_DRIVER(umodem); 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[1024]; usbd_status err; int data_ifcno; int i; struct ucom_attach_args uca; usbd_devinfo(uaa->device, 0, devinfo); USB_ATTACH_SETUP; sc->sc_udev = dev; sc->sc_ctl_iface = uaa->iface; id = usbd_get_interface_descriptor(sc->sc_ctl_iface); printf("%s: %s, iclass %d/%d\n", USBDEVNAME(sc->sc_dev), 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", USBDEVNAME(sc->sc_dev)); goto bad; } sc->sc_data_iface_no = data_ifcno = cmd->bDataInterface; printf("%s: data interface %d, has %sCM over data, has %sbreak\n", USBDEVNAME(sc->sc_dev), 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", USBDEVNAME(sc->sc_dev)); goto bad; } /* * Find the bulk endpoints. * Iterate over all endpoints in the data interface and take note. */ uca.bulkin = uca.bulkout = -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", USBDEVNAME(sc->sc_dev), i); goto bad; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { uca.bulkin = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { uca.bulkout = ed->bEndpointAddress; } } if (uca.bulkin == -1) { printf("%s: Could not find data bulk in\n", USBDEVNAME(sc->sc_dev)); goto bad; } if (uca.bulkout == -1) { printf("%s: Could not find data bulk out\n", USBDEVNAME(sc->sc_dev)); goto bad; } if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { 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", USBDEVNAME(sc->sc_dev)); 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", USBDEVNAME(sc->sc_dev)); sc->sc_ctl_notify = ed->bEndpointAddress; } } sc->sc_dtr = -1; uca.portno = UCOM_UNK_PORTNO; /* bulkin, bulkout set above */ uca.ibufsize = UMODEMIBUFSIZE; uca.obufsize = UMODEMOBUFSIZE; uca.ibufsizepad = UMODEMIBUFSIZE; uca.opkthdrlen = 0; uca.device = sc->sc_udev; uca.iface = sc->sc_data_iface; uca.methods = &umodem_methods; uca.arg = sc; uca.info = NULL; usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, USBDEV(sc->sc_dev)); DPRINTF(("umodem_attach: sc=%p\n", sc)); sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch); USB_ATTACH_SUCCESS_RETURN; bad: sc->sc_dying = 1; 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_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((struct ucom_softc *)sc->sc_subdev); 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 (1); } return (0); } int umodem_ioctl(void *addr, int portno, u_long cmd, caddr_t data, int flag, struct proc *p) { struct umodem_softc *sc = addr; int error = 0; if (sc->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); } int umodem_activate(device_ptr_t self, enum devact act) { struct umodem_softc *sc = (struct umodem_softc *)self; int rv = 0; switch (act) { case DVACT_ACTIVATE: return (EOPNOTSUPP); break; case DVACT_DEACTIVATE: sc->sc_dying = 1; if (sc->sc_subdev) rv = config_deactivate(sc->sc_subdev); break; } return (rv); } USB_DETACH(umodem) { USB_DETACH_START(umodem, sc); int rv = 0; DPRINTF(("umodem_detach: sc=%p flags=%d\n", sc, flags)); sc->sc_dying = 1; if (sc->sc_subdev != NULL) rv = config_detach(sc->sc_subdev, flags); usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, USBDEV(sc->sc_dev)); return (rv); }