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freebsd-dev/sys/dev/usb/umodem.c
Jonathan Lemon 608a3ce62a Extend kqueue down to the device layer. 
Backwards compatible approach suggested by: peter
2001-02-15 16:34:11 +00:00

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/* $NetBSD: umodem.c,v 1.5 1999/01/08 11:58:25 augustss Exp $ */
/* $FreeBSD$ */
/*
* 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/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/malloc.h>
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <sys/device.h>
#include <sys/ioctl.h>
#elif defined(__FreeBSD__)
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#endif
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/clist.h>
#include <sys/file.h>
#if __FreeBSD_version >= 500014
#include <sys/selinfo.h>
#else
#include <sys/select.h>
#endif
#include <sys/proc.h>
#include <sys/vnode.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>
#ifdef UMODEM_DEBUG
#define DPRINTF(x) if(umodemdebug) logprintf x
#define DPRINTFN(n, x) if(umodemdebug > (n)) logprintf x
int umodemdebug = 1;
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~((unsigned)(f))
#define ISSET(t, f) ((t) & (f))
#define UMODEMUNIT_MASK 0x3ffff
#define UMODEMDIALOUT_MASK 0x80000
#define UMODEMCALLUNIT_MASK 0x40000
#define UMODEMUNIT(x) (minor(x) & UMODEMUNIT_MASK)
#define UMODEMDIALOUT(x) (minor(x) & UMODEMDIALOUT_MASK)
#define UMODEMCALLUNIT(x) (minor(x) & UMODEMCALLUNIT_MASK)
#define UMODEMIBUFSIZE 64
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_bulkin_no; /* bulk in endpoint address */
usbd_pipe_handle sc_bulkin_pipe; /* bulk in pipe */
usbd_xfer_handle sc_ixfer; /* read request */
u_char *sc_ibuf; /* read buffer */
int sc_bulkout_no; /* bulk out endpoint address */
usbd_pipe_handle sc_bulkout_pipe;/* bulk out pipe */
usbd_xfer_handle sc_oxfer; /* read request */
int sc_cm_cap; /* CM capabilities */
int sc_acm_cap; /* ACM capabilities */
int sc_cm_over_data;
struct tty *sc_tty; /* our tty */
usb_cdc_line_state_t sc_line_state; /* current line state */
u_char sc_dtr; /* current DTR state */
u_char sc_opening; /* lock during open */
u_char sc_dying; /* disconnecting */
#if defined(__FreeBSD__)
dev_t dev; /* special device node */
#endif
};
#if defined(__NetBSD__) || defined(__OpenBSD__)
cdev_decl(umodem);
#elif defined(__FreeBSD__)
d_open_t umodemopen;
d_close_t umodemclose;
d_read_t umodemread;
d_write_t umodemwrite;
d_ioctl_t umodemioctl;
#define UMODEM_CDEV_MAJOR 124
static struct cdevsw umodem_cdevsw = {
/* open */ umodemopen,
/* close */ umodemclose,
/* read */ umodemread,
/* write */ umodemwrite,
/* ioctl */ umodemioctl,
/* poll */ ttypoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "umodem",
/* maj */ UMODEM_CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_TTY | D_KQFILTER,
/* bmaj */ -1,
/* kqfilter */ ttykqfilter,
};
#endif
void *umodem_get_desc
(usbd_device_handle dev, int type, int subtype);
usbd_status umodem_set_comm_feature
(struct umodem_softc *sc, int feature, int state);
usbd_status umodem_set_line_coding
(struct umodem_softc *sc, usb_cdc_line_state_t *state);
void umodem_get_caps (usbd_device_handle, int *, int *);
void umodem_cleanup (struct umodem_softc *);
int umodemparam (struct tty *, struct termios *);
void umodemstart (struct tty *);
void umodemstop (struct tty *, int);
struct tty * umodemtty (dev_t dev);
void umodem_shutdown (struct umodem_softc *);
void umodem_modem (struct umodem_softc *, int);
void umodem_break (struct umodem_softc *, int);
usbd_status umodemstartread (struct umodem_softc *);
void umodemreadcb (usbd_xfer_handle, usbd_private_handle,
usbd_status status);
void umodemwritecb (usbd_xfer_handle, usbd_private_handle,
usbd_status status);
USB_DECLARE_DRIVER(umodem);
USB_MATCH(umodem)
{
USB_MATCH_START(umodem, uaa);
usb_interface_descriptor_t *id;
int cm, acm;
if (!uaa->iface)
return (UMATCH_NONE);
id = usbd_get_interface_descriptor(uaa->iface);
if (id == 0 ||
id->bInterfaceClass != UCLASS_CDC ||
id->bInterfaceSubClass != USUBCLASS_ABSTRACT_CONTROL_MODEL ||
id->bInterfaceProtocol != UPROTO_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_ifaceno;
int i;
struct tty *tp;
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) {
DPRINTF(("%s: no CM desc\n", USBDEVNAME(sc->sc_dev)));
goto bad;
}
sc->sc_data_iface_no = data_ifaceno = cmd->bDataInterface;
printf("%s: data interface %d, has %sCM over data, has %sbreak\n",
USBDEVNAME(sc->sc_dev), data_ifaceno,
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]) {
id = usbd_get_interface_descriptor(uaa->ifaces[i]);
if (id->bInterfaceNumber == data_ifaceno) {
sc->sc_data_iface = uaa->ifaces[i];
uaa->ifaces[i] = 0;
}
}
}
if (!sc->sc_data_iface) {
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.
*/
sc->sc_bulkin_no = sc->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) {
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) {
sc->sc_bulkin_no = ed->bEndpointAddress;
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
(ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
sc->sc_bulkout_no = ed->bEndpointAddress;
}
}
if (sc->sc_bulkin_no == -1) {
DPRINTF(("%s: Could not find data bulk in\n",
USBDEVNAME(sc->sc_dev)));
goto bad;
}
if (sc->sc_bulkout_no == -1) {
DPRINTF(("%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) {
err = umodem_set_comm_feature(sc, UCDC_ABSTRACT_STATE,
UCDC_DATA_MULTIPLEXED);
if (err)
goto bad;
sc->sc_cm_over_data = 1;
}
}
#if defined(__NetBSD__) || defined(__OpenBSD__)
sc->sc_tty = tp = ttymalloc();
#elif defined(__FreeBSD__)
sc->sc_tty = tp = ttymalloc(sc->sc_tty);
#endif
tp->t_oproc = umodemstart;
tp->t_param = umodemparam;
tp->t_stop = umodemstop;
DPRINTF(("umodem_attach: tty_attach %p\n", tp));
#if defined(__NetBSD__) || defined(__OpenBSD__)
tty_attach(tp);
#endif
#if defined(__FreeBSD__)
DPRINTF(("umodem_attach: make_dev: umodem%d\n", device_get_unit(self)));
sc->dev = make_dev(&umodem_cdevsw, device_get_unit(self),
UID_UUCP, GID_DIALER, 0660,
"umodem%d", device_get_unit(self));
sc->dev->si_tty = tp;
#endif
sc->sc_dtr = -1;
USB_ATTACH_SUCCESS_RETURN;
bad:
DPRINTF(("umodem_attach: BAD -> DYING\n"));
sc->sc_dying = 1;
USB_ATTACH_ERROR_RETURN;
}
void
umodem_get_caps(dev, cm, acm)
usbd_device_handle dev;
int *cm, *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) {
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) {
DPRINTF(("umodem_get_desc: no ACM desc\n"));
return;
}
*acm = cad->bmCapabilities;
}
void
umodemstart(tp)
struct tty *tp;
{
struct umodem_softc *sc;
struct cblock *cbp;
int s;
u_char *data;
int cnt;
USB_GET_SC(umodem, UMODEMUNIT(tp->t_dev), sc);
if (sc->sc_dying)
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
ttwwakeup(tp);
DPRINTFN(4,("umodemstart: stopped\n"));
goto out;
}
#if defined(__NetBSD__) || defined(__OpenBSD__)
if (tp->t_outq.c_cc <= tp->t_lowat) {
if (ISSET(tp->t_state, TS_ASLEEP)) {
CLR(tp->t_state, TS_ASLEEP);
wakeup(&tp->t_outq);
}
selwakeup(&tp->t_wsel);
if (tp->t_outq.c_cc == 0)
goto out;
}
#elif defined(__FreeBSD__)
if (tp->t_outq.c_cc <= tp->t_olowat) {
if (ISSET(tp->t_state, TS_SO_OLOWAT)) {
CLR(tp->t_state, TS_SO_OLOWAT);
wakeup(TSA_OLOWAT(tp));
}
selwakeup(&tp->t_wsel);
if (tp->t_outq.c_cc == 0) {
if (ISSET(tp->t_state, TS_BUSY | TS_SO_OCOMPLETE) ==
TS_SO_OCOMPLETE && tp->t_outq.c_cc == 0) {
CLR(tp->t_state, TS_SO_OCOMPLETE);
wakeup(TSA_OCOMPLETE(tp));
}
goto out;
}
}
#endif
/* Grab the first contiguous region of buffer space. */
data = tp->t_outq.c_cf;
#if defined(__NetBSD__) || defined(__OpenBSD__)
cnt = ndqb(&tp->t_outq, 0);
#elif defined(__FreeBSD__)
cbp = (struct cblock *) ((intptr_t) tp->t_outq.c_cf & ~CROUND);
cnt = min((char *) (cbp+1) - tp->t_outq.c_cf, tp->t_outq.c_cc);
#endif
if (cnt == 0) {
DPRINTF(("umodemstart: cnt==0\n"));
splx(s);
return;
}
SET(tp->t_state, TS_BUSY);
DPRINTFN(4,("umodemstart: %d chars\n", cnt));
/* XXX what can we do on error? */
usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
(usbd_private_handle)sc, data, cnt,
0, USBD_NO_TIMEOUT, umodemwritecb);
(void)usbd_transfer(sc->sc_oxfer);
ttwwakeup(tp);
out:
splx(s);
}
void
umodemwritecb(xfer, priv, status)
usbd_xfer_handle xfer;
usbd_private_handle priv;
usbd_status status;
{
struct umodem_softc *sc = (struct umodem_softc *)priv;
struct tty *tp = sc->sc_tty;
u_int32_t cc;
int s;
DPRINTFN(5,("umodemwritecb: status=%d\n", status));
if (status == USBD_CANCELLED)
return;
if (status != USBD_NORMAL_COMPLETION) {
DPRINTF(("umodemwritecb: status=%d\n", status));
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
/* XXX we should restart after some delay. */
return;
}
usbd_get_xfer_status(xfer, 0, 0, &cc, 0);
DPRINTFN(5,("umodemwritecb: cc=%d\n", cc));
s = spltty();
CLR(tp->t_state, TS_BUSY);
if (ISSET(tp->t_state, TS_FLUSH))
CLR(tp->t_state, TS_FLUSH);
else
ndflush(&tp->t_outq, cc);
(*linesw[tp->t_line].l_start)(tp);
splx(s);
}
int
umodemparam(tp, t)
struct tty *tp;
struct termios *t;
{
struct umodem_softc *sc;
usb_cdc_line_state_t ls;
USB_GET_SC(umodem, UMODEMUNIT(tp->t_dev), sc);
if (sc->sc_dying)
return (EIO);
/* Check requested parameters. */
if (t->c_ospeed < 0)
return (EINVAL);
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
return (EINVAL);
/*
* If there were no changes, don't do anything. This avoids dropping
* input and improves performance when all we did was frob things like
* VMIN and VTIME.
*/
if (tp->t_ospeed == t->c_ospeed &&
tp->t_cflag == t->c_cflag)
return (0);
/* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
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;
}
/* XXX what can we if it fails? */
(void)umodem_set_line_coding(sc, &ls);
/*
* Update the tty layer's idea of the carrier bit, in case we changed
* CLOCAL or MDMBUF. We don't hang up here; we only do that by
* explicit request.
*/
(void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ );
return (0);
}
int
umodemopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = UMODEMUNIT(dev);
struct umodem_softc *sc;
usbd_status err;
struct tty *tp;
int s;
int error;
USB_GET_SC_OPEN(umodem, unit, sc);
if (sc->sc_dying)
return (EIO);
#if defined(__NetBSD__) || defined(__OpenBBSD__)
if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0)
return (ENXIO);
#endif
tp = sc->sc_tty;
DPRINTF(("%s: umodemopen: tp=%p\n", USBDEVNAME(sc->sc_dev), tp));
if (ISSET(tp->t_state, TS_ISOPEN) &&
ISSET(tp->t_state, TS_XCLUDE) &&
suser(p))
return (EBUSY);
/*
* Do the following iff this is a first open.
*/
s = spltty();
while (sc->sc_opening)
tsleep(&sc->sc_opening, PRIBIO, "umdmop", 0);
sc->sc_opening = 1;
#if defined(__NetBSD__) || defined(__OpenBSD__)
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
#elif defined(__FreeBSD__)
if (!ISSET(tp->t_state, TS_ISOPEN)) {
#endif
struct termios t;
tp->t_dev = dev;
/*
* Initialize the termios status to the defaults. Add in the
* sticky bits from TIOCSFLAGS.
*/
t.c_ispeed = 0;
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
/* Make sure umodemparam() will do something. */
tp->t_ospeed = 0;
(void) umodemparam(tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
ttsetwater(tp);
/*
* Turn on DTR. We must always do this, even if carrier is not
* present, because otherwise we'd have to use TIOCSDTR
* immediately after setting CLOCAL, which applications do not
* expect. We always assert DTR while the device is open
* unless explicitly requested to deassert it.
*/
umodem_modem(sc, 1);
DPRINTF(("umodemopen: open pipes\n"));
/* Open the bulk pipes */
err = usbd_open_pipe(sc->sc_data_iface, sc->sc_bulkin_no, 0,
&sc->sc_bulkin_pipe);
if (err) {
DPRINTF(("%s: cannot open bulk out pipe (addr %d)\n",
USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no));
return (EIO);
}
err = usbd_open_pipe(sc->sc_data_iface, sc->sc_bulkout_no,
USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
if (err) {
DPRINTF(("%s: cannot open bulk in pipe (addr %d)\n",
USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no));
usbd_close_pipe(sc->sc_bulkin_pipe);
return (EIO);
}
/* Allocate a request and an input buffer and start reading. */
sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_ixfer == 0) {
usbd_close_pipe(sc->sc_bulkin_pipe);
usbd_close_pipe(sc->sc_bulkout_pipe);
return (ENOMEM);
}
sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->sc_oxfer == 0) {
usbd_close_pipe(sc->sc_bulkin_pipe);
usbd_close_pipe(sc->sc_bulkout_pipe);
usbd_free_xfer(sc->sc_ixfer);
return (ENOMEM);
}
sc->sc_ibuf = malloc(UMODEMIBUFSIZE, M_USBDEV, M_WAITOK);
umodemstartread(sc);
}
sc->sc_opening = 0;
wakeup(&sc->sc_opening);
splx(s);
#if defined(__NetBSD__) || defined(__OpenBSD__)
error = ttyopen(tp, UMODEMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
if (error)
goto bad;
#elif defined(__FreeBSD__)
error = ttyopen(dev, tp);
if (error)
goto bad;
#endif
error = (*linesw[tp->t_line].l_open)(dev, tp);
if (error)
goto bad;
return (0);
bad:
#if defined(__NetBSD__) || defined(__OpenBSD__)
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
#elif defined(__FreeBSD__)
if (!ISSET(tp->t_state, TS_ISOPEN)) {
#endif
/*
* We failed to open the device, and nobody else had it opened.
* Clean up the state as appropriate.
*/
umodem_cleanup(sc);
}
return (error);
}
usbd_status
umodemstartread(sc)
struct umodem_softc *sc;
{
usbd_status err;
DPRINTFN(5,("umodemstartread: start\n"));
usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
(usbd_private_handle)sc,
sc->sc_ibuf, UMODEMIBUFSIZE, USBD_SHORT_XFER_OK,
USBD_NO_TIMEOUT, umodemreadcb);
err = usbd_transfer(sc->sc_ixfer);
if (err != USBD_IN_PROGRESS)
return (err);
return (USBD_NORMAL_COMPLETION);
}
void
umodemreadcb(xfer, p, status)
usbd_xfer_handle xfer;
usbd_private_handle p;
usbd_status status;
{
struct umodem_softc *sc = (struct umodem_softc *)p;
struct tty *tp = sc->sc_tty;
int (*rint) (int c, struct tty *tp) = linesw[tp->t_line].l_rint;
usbd_status err;
u_int32_t cc;
u_char *cp;
int s;
if (status == USBD_CANCELLED)
return;
if (status != USBD_NORMAL_COMPLETION) {
DPRINTF(("umodemreadcb: status=%d\n", status));
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
/* XXX we should restart after some delay. */
return;
}
usbd_get_xfer_status(xfer, 0, (void **)&cp, &cc, 0);
DPRINTFN(5,("umodemreadcb: got %d chars, tp=%p\n", cc, tp));
s = spltty();
/* Give characters to tty layer. */
while (cc-- > 0) {
DPRINTFN(7,("umodemreadcb: char=0x%02x\n", *cp));
if ((*rint)(*cp++, tp) == -1) {
/* XXX what should we do? */
break;
}
}
splx(s);
err = umodemstartread(sc);
if (err) {
printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev));
/* XXX what should we dow now? */
}
}
int
umodemclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct umodem_softc *sc;
struct tty *tp;
int s;
USB_GET_SC(umodem, UMODEMUNIT(dev), sc);
tp = sc->sc_tty;
DPRINTF(("%s: umodemclose sc_tty=%p\n", USBDEVNAME(sc->sc_dev), tp));
if (!ISSET(tp->t_state, TS_ISOPEN))
return (0);
DPRINTF(("%s: umodemclose lclose(%p,%d)\n", USBDEVNAME(sc->sc_dev), tp,flag));
s=spltty();
DPRINTF(("%s: umodemclose lclose=%p\n", USBDEVNAME(sc->sc_dev), linesw[tp->t_line].l_close));
(*linesw[tp->t_line].l_close)(tp, flag);
DPRINTF(("%s: umodemclose ttyclose(%p)\n", USBDEVNAME(sc->sc_dev), tp));
ttyclose(tp);
splx(s);
DPRINTF(("%s: umodemclose sc->sc_dying=%d\n", USBDEVNAME(sc->sc_dev), sc->sc_dying));
if (sc->sc_dying)
return (0);
DPRINTF(("%s: umodemclose tp->t_state=%d\n", USBDEVNAME(sc->sc_dev), tp->t_state));
#if defined(__NetBSD__) || defined(__OpenBSD__)
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
#elif defined(__FreeBSD__)
if (!ISSET(tp->t_state, TS_ISOPEN)) {
#endif
/*
* Although we got a last close, the device may still be in
* use; e.g. if this was the dialout node, and there are still
* processes waiting for carrier on the non-dialout node.
*/
DPRINTF(("%s: umodemclose umodem_cleanup(%p)\n", USBDEVNAME(sc->sc_dev), sc));
umodem_cleanup(sc);
}
DPRINTF(("%s: umodemclose return\n", USBDEVNAME(sc->sc_dev)));
return (0);
}
void
umodem_cleanup(sc)
struct umodem_softc *sc;
{
umodem_shutdown(sc);
DPRINTFN(5, ("%s: umodem_cleanup: closing pipes\n",
USBDEVNAME(sc->sc_dev)));
usbd_abort_pipe(sc->sc_bulkin_pipe);
usbd_close_pipe(sc->sc_bulkin_pipe);
usbd_abort_pipe(sc->sc_bulkout_pipe);
usbd_close_pipe(sc->sc_bulkout_pipe);
usbd_free_xfer(sc->sc_ixfer);
usbd_free_xfer(sc->sc_oxfer);
free(sc->sc_ibuf, M_USBDEV);
}
int
umodemread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct umodem_softc *sc;
struct tty *tp;
USB_GET_SC(umodem, UMODEMUNIT(dev), sc);
tp = sc->sc_tty;
if (sc->sc_dying)
return (EIO);
return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
}
int
umodemwrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct umodem_softc *sc;
struct tty *tp;
USB_GET_SC(umodem, UMODEMUNIT(dev), sc);
tp = sc->sc_tty;
if (sc->sc_dying)
return (EIO);
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
void
umodemstop(tp, flag)
struct tty *tp;
int flag;
{
struct umodem_softc *sc;
int s;
USB_GET_SC(umodem, UMODEMUNIT(tp->t_dev), sc);
DPRINTF(("umodemstop: %d\n", flag));
s = spltty();
if (ISSET(tp->t_state, TS_BUSY)) {
DPRINTF(("umodemstop: XXX\n"));
/* XXX do what? */
if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
}
splx(s);
}
struct tty *
umodemtty(dev)
dev_t dev;
{
struct umodem_softc *sc;
struct tty *tp;
USB_GET_SC(umodem, UMODEMUNIT(dev), sc);
tp = sc->sc_tty;
return (tp);
}
int
umodemioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct umodem_softc *sc;
struct tty *tp;
int error;
int s;
int bits;
USB_GET_SC(umodem, UMODEMUNIT(dev), sc);
tp = sc->sc_tty;
if (sc->sc_dying)
return (EIO);
DPRINTF(("umodemioctl: cmd=0x%08lx\n", cmd));
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
if (error >= 0)
return (error);
#if defined(__NetBSD__) || defined(__OpenBSD__)
error = ttioctl(tp, cmd, data, flag, p);
#elif defined(__FreeBSD__)
error = ttioctl(tp, cmd, data, flag);
#endif
if (error >= 0)
return (error);
DPRINTF(("umodemioctl: our cmd=0x%08lx\n", cmd));
s = spltty();
switch (cmd) {
case TIOCSBRK:
umodem_break(sc, 1);
break;
case TIOCCBRK:
umodem_break(sc, 0);
break;
case TIOCSDTR:
umodem_modem(sc, 1);
break;
case TIOCCDTR:
umodem_modem(sc, 0);
break;
case TIOCMGET:
bits = TIOCM_LE;
if(sc->sc_dtr)
bits |= TIOCM_DTR;
*(int *)data = bits;
break;
case TIOCMSET:
break;
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;
splx(s);
return (error);
}
splx(s);
return(0);
}
void
umodem_shutdown(sc)
struct umodem_softc *sc;
{
struct tty *tp = sc->sc_tty;
DPRINTF(("%s: umodem_shutdown\n", USBDEVNAME(sc->sc_dev)));
/*
* Hang up if necessary. Wait a bit, so the other side has time to
* notice even if we immediately open the port again.
*/
if (ISSET(tp->t_cflag, HUPCL)) {
umodem_modem(sc, 0);
#if defined(__NetBSD__) || defined(__OpenBSD__)
(void) tsleep(sc, TTIPRI, ttclos, hz);
#elif defined(__FreeBSD__)
(void) tsleep(sc, TTIPRI, "umdmsd", hz);
#endif
}
}
void
umodem_modem(sc, onoff)
struct umodem_softc *sc;
int onoff;
{
usb_device_request_t req;
DPRINTF(("%s: umodem_modem: onoff=%d\n", USBDEVNAME(sc->sc_dev),onoff));
if (sc->sc_dtr == onoff)
return;
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
USETW(req.wValue, onoff ? UCDC_LINE_DTR : 0);
USETW(req.wIndex, sc->sc_ctl_iface_no);
USETW(req.wLength, 0);
(void)usbd_do_request(sc->sc_udev, &req, 0);
sc->sc_dtr = onoff;
}
void
umodem_break(sc, onoff)
struct umodem_softc *sc;
int onoff;
{
usb_device_request_t req;
DPRINTF(("%s: umodem_break: onoff=%d\n", USBDEVNAME(sc->sc_dev),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_get_desc(dev, type, subtype)
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(sc, feature, state)
struct umodem_softc *sc;
int feature;
int state;
{
usb_device_request_t req;
usbd_status err;
usb_cdc_abstract_state_t ast;
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(("%s: umodem_set_comm_feat: feature=%d failed, err=%d\n",
USBDEVNAME(sc->sc_dev), feature, err));
return (err);
}
return (USBD_NORMAL_COMPLETION);
}
usbd_status
umodem_set_line_coding(sc, state)
struct umodem_softc *sc;
usb_cdc_line_state_t *state;
{
usb_device_request_t req;
usbd_status err;
DPRINTF(("%s: umodem_set_line_cod: rate=%d fmt=%d parity=%d bits=%d\n",
USBDEVNAME(sc->sc_dev), UGETDW(state->dwDTERate),
state->bCharFormat, state->bParityType, state->bDataBits));
if (bcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) {
DPRINTF(("%s: umodem_set_line_coding: already set\n",
USBDEVNAME(sc->sc_dev)));
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(("%s: umodem_set_line_coding: failed, err=%d\n",
USBDEVNAME(sc->sc_dev), err));
return (err);
}
sc->sc_line_state = *state;
return (USBD_NORMAL_COMPLETION);
}
#if defined(__NetBSD__) || defined(__OpenBSD__)
int
umodem_activate(self, act)
device_ptr_t self;
enum devact act;
{
struct umodem_softc *sc = (struct umodem_softc *)self;
switch (act) {
case DVACT_ACTIVATE:
return (EOPNOTSUPP);
break;
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
break;
}
return (0);
}
#endif
USB_DETACH(umodem)
{
USB_DETACH_START(umodem, sc);
#if defined(__NetBSD__) || defined(__OpenBSD__)
int maj, mn;
DPRINTF(("umodem_detach: sc=%p flags=%d tp=%p\n",
sc, flags, sc->sc_tty));
#elif defined(__FreeBSD__)
DPRINTF(("umodem_detach: sc=%p flags=%d, tp=%p\n",
sc, 0, sc->sc_tty));
#endif
sc->sc_dying = 1;
#ifdef DIAGNOSTIC
if (sc->sc_tty == 0) {
DPRINTF(("umodem_detach: no tty\n"));
return (0);
}
#endif
/* use refernce count? XXX */
#if defined(__NetBSD__) || defined(__OpenBSD__)
/* locate the major number */
for (maj = 0; maj < nchrdev; maj++)
if (cdevsw[maj].d_open == umodemopen)
break;
/* Nuke the vnodes for any open instances. */
mn = self->dv_unit;
vdevgone(maj, mn, mn, VCHR);
vdevgone(maj, mn, mn | UMODEMDIALOUT_MASK, VCHR);
vdevgone(maj, mn, mn | UMODEMCALLUNIT_MASK, VCHR);
#elif defined(__FreeBSD__)
/* XXX not yet implemented */
#endif
#if defined(__FreeBSD__)
destroy_dev(sc->dev);
#endif
/* Detach and free the tty. */
#if defined(__NetBSD__) || defined(__OpenBSD__)
tty_detach(sc->sc_tty);
ttyfree(sc->sc_tty);
sc->sc_tty = 0;
#endif
return (0);
}
#if defined(__FreeBSD__)
DRIVER_MODULE(umodem, uhub, umodem_driver, umodem_devclass, usbd_driver_load,0);
#endif
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