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NetBSD/sys/dev/usb/ucycom.c

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/* $NetBSD: ucycom.c,v 1.56 2022/10/26 23:50:28 riastradh Exp $ */
/*
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Nick Hudson
*
* 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.
*/
/*
* This code is based on the ucom driver.
*/
/*
* Device driver for Cypress CY7C637xx and CY7C640/1xx series USB to
* RS232 bridges.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ucycom.c,v 1.56 2022/10/26 23:50:28 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_usb.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/device.h>
#include <sys/sysctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/kauth.h>
#include <sys/lwp.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/uhidev.h>
#include <dev/hid/hid.h>
#include "ioconf.h"
#ifdef UCYCOM_DEBUG
#define DPRINTF(x) if (ucycomdebug) printf x
#define DPRINTFN(n, x) if (ucycomdebug > (n)) printf x
int ucycomdebug = 20;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
#define UCYCOMCALLUNIT_MASK TTCALLUNIT_MASK
#define UCYCOMUNIT_MASK TTUNIT_MASK
#define UCYCOMDIALOUT_MASK TTDIALOUT_MASK
#define UCYCOMCALLUNIT(x) TTCALLUNIT(x)
#define UCYCOMUNIT(x) TTUNIT(x)
#define UCYCOMDIALOUT(x) TTDIALOUT(x)
/* Configuration Byte */
#define UCYCOM_RESET 0x80
#define UCYCOM_PARITY_TYPE_MASK 0x20
#define UCYCOM_PARITY_ODD 0x20
#define UCYCOM_PARITY_EVEN 0x00
#define UCYCOM_PARITY_MASK 0x10
#define UCYCOM_PARITY_ON 0x10
#define UCYCOM_PARITY_OFF 0x00
#define UCYCOM_STOP_MASK 0x08
#define UCYCOM_STOP_BITS_2 0x08
#define UCYCOM_STOP_BITS_1 0x00
#define UCYCOM_DATA_MASK 0x03
#define UCYCOM_DATA_BITS_8 0x03
#define UCYCOM_DATA_BITS_7 0x02
#define UCYCOM_DATA_BITS_6 0x01
#define UCYCOM_DATA_BITS_5 0x00
/* Modem (Input) status byte */
#define UCYCOM_RI 0x80
#define UCYCOM_DCD 0x40
#define UCYCOM_DSR 0x20
#define UCYCOM_CTS 0x10
#define UCYCOM_ERROR 0x08
#define UCYCOM_LMASK 0x07
/* Modem (Output) control byte */
#define UCYCOM_DTR 0x20
#define UCYCOM_RTS 0x10
#define UCYCOM_ORESET 0x08
struct ucycom_softc {
device_t sc_dev;
struct uhidev *sc_hdev;
struct usbd_device *sc_udev;
struct usb_task sc_task;
struct tty *sc_tty;
enum {
UCYCOM_INIT_NONE,
UCYCOM_INIT_INITED
} sc_init_state;
kmutex_t sc_lock; /* protects refcnt, others */
/* uhidev parameters */
size_t sc_flen; /* feature report length */
size_t sc_olen; /* output report length */
uint8_t *sc_obuf;
int sc_wlen;
/* settings */
uint32_t sc_baud;
uint8_t sc_cfg; /* Data format */
uint8_t sc_mcr; /* Modem control */
uint8_t sc_msr; /* Modem status */
int sc_swflags;
/* flags */
char sc_dying;
};
static dev_type_open(ucycomopen);
static dev_type_close(ucycomclose);
static dev_type_read(ucycomread);
static dev_type_write(ucycomwrite);
static dev_type_ioctl(ucycomioctl);
static dev_type_stop(ucycomstop);
static dev_type_tty(ucycomtty);
static dev_type_poll(ucycompoll);
const struct cdevsw ucycom_cdevsw = {
.d_open = ucycomopen,
.d_close = ucycomclose,
.d_read = ucycomread,
.d_write = ucycomwrite,
.d_ioctl = ucycomioctl,
.d_stop = ucycomstop,
.d_tty = ucycomtty,
.d_poll = ucycompoll,
.d_mmap = nommap,
.d_kqfilter = ttykqfilter,
.d_discard = nodiscard,
.d_flag = D_TTY
};
Static int ucycomparam(struct tty *, struct termios *);
Static void ucycomstart(struct tty *);
Static void ucycomstarttask(void *);
Static void ucycomwritecb(struct usbd_xfer *, void *, usbd_status);
Static void ucycom_intr(void *, void *, u_int);
Static int ucycom_configure(struct ucycom_softc *, uint32_t, uint8_t);
Static void tiocm_to_ucycom(struct ucycom_softc *, u_long, int);
Static int ucycom_to_tiocm(struct ucycom_softc *);
Static void ucycom_set_status(struct ucycom_softc *);
Static void ucycom_dtr(struct ucycom_softc *, int);
#if 0
Static void ucycom_rts(struct ucycom_softc *, int);
#endif
Static void ucycom_cleanup(struct ucycom_softc *);
#ifdef UCYCOM_DEBUG
Static void ucycom_get_cfg(struct ucycom_softc *);
#endif
Static const struct usb_devno ucycom_devs[] = {
{ USB_VENDOR_CYPRESS, USB_PRODUCT_CYPRESS_USBRS232 },
{ USB_VENDOR_DELORME, USB_PRODUCT_DELORME_EARTHMATE },
};
#define ucycom_lookup(v, p) usb_lookup(ucycom_devs, v, p)
static int ucycom_match(device_t, cfdata_t, void *);
static void ucycom_attach(device_t, device_t, void *);
static int ucycom_detach(device_t, int);
static int ucycom_activate(device_t, enum devact);
CFATTACH_DECL_NEW(ucycom, sizeof(struct ucycom_softc), ucycom_match,
ucycom_attach, ucycom_detach, ucycom_activate);
static int
ucycom_match(device_t parent, cfdata_t match, void *aux)
{
struct uhidev_attach_arg *uha = aux;
return ucycom_lookup(uha->uiaa->uiaa_vendor, uha->uiaa->uiaa_product)
!= NULL ? UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}
static void
ucycom_attach(device_t parent, device_t self, void *aux)
{
struct ucycom_softc *sc = device_private(self);
struct uhidev_attach_arg *uha = aux;
int size, repid;
void *desc;
sc->sc_dev = self;
sc->sc_hdev = uha->parent;
sc->sc_udev = uha->uiaa->uiaa_device;
sc->sc_init_state = UCYCOM_INIT_NONE;
uhidev_get_report_desc(uha->parent, &desc, &size);
repid = uha->reportid;
sc->sc_olen = hid_report_size(desc, size, hid_output, repid);
sc->sc_flen = hid_report_size(desc, size, hid_feature, repid);
if (sc->sc_olen != 8 && sc->sc_olen != 32)
return;
if (sc->sc_flen != 5)
return;
sc->sc_msr = sc->sc_mcr = 0;
/* not MP-safe */
usb_init_task(&sc->sc_task, ucycomstarttask, sc, 0);
/* set up tty */
sc->sc_tty = tty_alloc();
sc->sc_tty->t_sc = sc;
sc->sc_tty->t_oproc = ucycomstart;
sc->sc_tty->t_param = ucycomparam;
tty_attach(sc->sc_tty);
/* Nothing interesting to report */
aprint_normal("\n");
sc->sc_init_state = UCYCOM_INIT_INITED;
}
static int
ucycom_detach(device_t self, int flags)
{
struct ucycom_softc *sc = device_private(self);
struct tty *tp = sc->sc_tty;
int maj, mn;
int s;
DPRINTF(("ucycom_detach: sc=%p flags=%d tp=%p\n", sc, flags, tp));
sc->sc_dying = 1;
s = splusb();
if (tp != NULL) {
ttylock(tp);
CLR(tp->t_state, TS_CARR_ON);
CLR(tp->t_cflag, CLOCAL | MDMBUF);
ttyflush(tp, FREAD|FWRITE);
ttyunlock(tp);
}
/* Wait for processes to go away. */
usb_detach_waitold(sc->sc_dev);
splx(s);
/* locate the major number */
maj = cdevsw_lookup_major(&ucycom_cdevsw);
/* Nuke the vnodes for any open instances. */
mn = device_unit(self);
DPRINTFN(2, ("ucycom_detach: maj=%d mn=%d\n", maj, mn));
vdevgone(maj, mn, mn, VCHR);
vdevgone(maj, mn | UCYCOMDIALOUT_MASK, mn | UCYCOMDIALOUT_MASK, VCHR);
vdevgone(maj, mn | UCYCOMCALLUNIT_MASK, mn | UCYCOMCALLUNIT_MASK, VCHR);
usb_rem_task_wait(sc->sc_udev, &sc->sc_task, USB_TASKQ_DRIVER, NULL);
/* Detach and free the tty. */
if (tp != NULL) {
DPRINTF(("ucycom_detach: tty_detach %p\n", tp));
tty_detach(tp);
tty_free(tp);
sc->sc_tty = NULL;
}
return 0;
}
static int
ucycom_activate(device_t self, enum devact act)
{
struct ucycom_softc *sc = device_private(self);
DPRINTFN(5,("ucycom_activate: %d\n", act));
switch (act) {
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
return 0;
default:
return EOPNOTSUPP;
}
}
#if 0
void
ucycom_shutdown(struct ucycom_softc *sc)
{
struct tty *tp = sc->sc_tty;
DPRINTF(("ucycom_shutdown\n"));
/*
* 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)) {
ucycom_dtr(sc, 0);
(void)tsleep(sc, TTIPRI, ttclos, hz);
}
}
#endif
static int
ucycomopen(dev_t dev, int flag, int mode, struct lwp *l)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp;
int s, err;
DPRINTF(("ucycomopen: unit=%d\n", UCYCOMUNIT(dev)));
DPRINTF(("ucycomopen: sc=%p\n", sc));
if (sc == NULL)
return ENXIO;
if (sc->sc_dying)
return EIO;
if (sc->sc_init_state != UCYCOM_INIT_INITED)
return ENXIO;
if (!device_is_active(sc->sc_dev))
return ENXIO;
tp = sc->sc_tty;
DPRINTF(("ucycomopen: tp=%p\n", tp));
if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
return EBUSY;
s = spltty();
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
struct termios t;
tp->t_dev = dev;
err = uhidev_open(sc->sc_hdev, &ucycom_intr, sc);
if (err) {
/* Any cleanup? */
splx(s);
return err;
}
/*
* 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;
if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
SET(t.c_cflag, CLOCAL);
if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
SET(t.c_cflag, CRTSCTS);
if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
SET(t.c_cflag, MDMBUF);
tp->t_ospeed = 0;
(void) ucycomparam(tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
ttychars(tp);
ttsetwater(tp);
/* Allocate an output report buffer */
sc->sc_obuf = kmem_alloc(sc->sc_olen, KM_SLEEP);
DPRINTF(("ucycomopen: sc->sc_obuf=%p\n", sc->sc_obuf));
#if 0
/* XXX Don't do this as for some reason trying to do an
* XXX interrupt out transfer at this point means everything
* XXX gets stuck!?!
*/
/*
* 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.
*/
ucycom_dtr(sc, 1);
#endif
#if 0
/* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/
ucycom_hwiflow(sc);
#endif
}
splx(s);
err = ttyopen(tp, UCYCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
if (err)
goto bad;
err = (*tp->t_linesw->l_open)(dev, tp);
if (err)
goto bad;
return 0;
bad:
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* We failed to open the device, and nobody else had it opened.
* Clean up the state as appropriate.
*/
ucycom_cleanup(sc);
}
return err;
}
static int
ucycomclose(dev_t dev, int flag, int mode, struct lwp *l)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp = sc->sc_tty;
DPRINTF(("ucycomclose: unit=%d\n", UCYCOMUNIT(dev)));
if (!ISSET(tp->t_state, TS_ISOPEN))
return 0;
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
/*
* 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.
*/
ucycom_cleanup(sc);
}
return 0;
}
Static void
ucycomstart(struct tty *tp)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(tp->t_dev));
usbd_status err __unused;
u_char *data;
int cnt, len, s;
KASSERT(ttylocked(tp));
if (sc->sc_dying)
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
DPRINTFN(4,("ucycomstart: no go, state=%#x\n", tp->t_state));
goto out;
}
#if 0
/* HW FLOW CTL */
if (sc->sc_tx_stopped)
goto out;
#endif
if (ttypull(tp) == 0)
goto out;
/* Grab the first contiguous region of buffer space. */
data = tp->t_outq.c_cf;
cnt = ndqb(&tp->t_outq, 0);
if (cnt == 0) {
DPRINTF(("ucycomstart: cnt == 0\n"));
goto out;
}
SET(tp->t_state, TS_BUSY);
/*
* The 8 byte output report uses byte 0 for control and byte
* count.
*
* The 32 byte output report uses byte 0 for control. Byte 1
* is used for byte count.
*/
memset(sc->sc_obuf, 0, sc->sc_olen);
len = cnt;
switch (sc->sc_olen) {
case 8:
if (cnt > sc->sc_olen - 1) {
DPRINTF(("ucycomstart(8): big buffer %d chars\n", len));
len = sc->sc_olen - 1;
}
memcpy(sc->sc_obuf + 1, data, len);
sc->sc_obuf[0] = len | sc->sc_mcr;
DPRINTF(("ucycomstart(8): sc->sc_obuf[0] = %d | %d = %d\n",
len, sc->sc_mcr, sc->sc_obuf[0]));
#ifdef UCYCOM_DEBUG
if (ucycomdebug > 10) {
uint32_t i;
uint8_t *d = data;
DPRINTF(("ucycomstart(8): data ="));
for (i = 0; i < len; i++)
DPRINTF((" %02x", d[i]));
DPRINTF(("\n"));
}
#endif
break;
case 32:
if (cnt > sc->sc_olen - 2) {
DPRINTF(("ucycomstart(32): big buffer %d chars\n",
len));
len = sc->sc_olen - 2;
}
memcpy(sc->sc_obuf + 2, data, len);
sc->sc_obuf[0] = sc->sc_mcr;
sc->sc_obuf[1] = len;
DPRINTF(("ucycomstart(32): sc->sc_obuf[0] = %d\n"
"sc->sc_obuf[1] = %d\n", sc->sc_obuf[0], sc->sc_obuf[1]));
#ifdef UCYCOM_DEBUG
if (ucycomdebug > 10) {
uint32_t i;
uint8_t *d = data;
DPRINTF(("ucycomstart(32): data ="));
for (i = 0; i < len; i++)
DPRINTF((" %02x", d[i]));
DPRINTF(("\n"));
}
#endif
break;
default:
DPRINTFN(2,("ucycomstart: unknown output report size (%zd)\n",
sc->sc_olen));
goto out;
}
splx(s);
sc->sc_wlen = len;
#ifdef UCYCOM_DEBUG
if (ucycomdebug > 5) {
int i;
if (len != 0) {
DPRINTF(("ucycomstart: sc->sc_obuf[0..%zd) =",
sc->sc_olen));
for (i = 0; i < sc->sc_olen; i++)
DPRINTF((" %02x", sc->sc_obuf[i]));
DPRINTF(("\n"));
}
}
#endif
DPRINTFN(4,("ucycomstart: %d chars\n", len));
usb_add_task(sc->sc_udev, &sc->sc_task, USB_TASKQ_DRIVER);
return;
out:
splx(s);
}
Static void
ucycomstarttask(void *cookie)
{
struct ucycom_softc *sc = cookie;
usbd_status err;
/* What can we do on error? */
err = uhidev_write_async(sc->sc_hdev, sc->sc_obuf, sc->sc_olen, 0,
USBD_NO_TIMEOUT, ucycomwritecb, sc);
#ifdef UCYCOM_DEBUG
if (err != USBD_IN_PROGRESS)
DPRINTF(("ucycomstart: err=%s\n", usbd_errstr(err)));
#else
__USE(err);
#endif
}
Static void
ucycomwritecb(struct usbd_xfer *xfer, void *p, usbd_status status)
{
struct ucycom_softc *sc = (struct ucycom_softc *)p;
struct tty *tp = sc->sc_tty;
usbd_status stat;
int len, s;
if (status == USBD_CANCELLED || sc->sc_dying)
goto error;
if (status) {
DPRINTF(("ucycomwritecb: status=%d\n", status));
/* XXX we should restart after some delay. */
goto error;
}
usbd_get_xfer_status(xfer, NULL, NULL, &len, &stat);
if (status != USBD_NORMAL_COMPLETION) {
DPRINTFN(4,("ucycomwritecb: status = %d\n", status));
goto error;
}
DPRINTFN(4,("ucycomwritecb: did %d/%d chars\n", sc->sc_wlen, len));
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, sc->sc_wlen);
(*tp->t_linesw->l_start)(tp);
splx(s);
return;
error:
s = spltty();
CLR(tp->t_state, TS_BUSY);
splx(s);
}
Static int
ucycomparam(struct tty *tp, struct termios *t)
{
struct ucycom_softc *sc = tp->t_sc;
uint32_t baud;
uint8_t cfg;
int err;
if (t->c_ospeed < 0) {
DPRINTF(("ucycomparam: c_ospeed < 0\n"));
return EINVAL;
}
/* Check requested parameters. */
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
return EINVAL;
/*
* For the console, always force CLOCAL and !HUPCL, so that the port
* is always active.
*/
if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) {
SET(t->c_cflag, CLOCAL);
CLR(t->c_cflag, HUPCL);
}
/*
* 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;
/* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */
/* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
baud = t->c_ispeed;
DPRINTF(("ucycomparam: baud=%d\n", baud));
if (t->c_cflag & CIGNORE) {
cfg = sc->sc_cfg;
} else {
cfg = 0;
switch (t->c_cflag & CSIZE) {
case CS8:
cfg |= UCYCOM_DATA_BITS_8;
break;
case CS7:
cfg |= UCYCOM_DATA_BITS_7;
break;
case CS6:
cfg |= UCYCOM_DATA_BITS_6;
break;
case CS5:
cfg |= UCYCOM_DATA_BITS_5;
break;
default:
return EINVAL;
}
cfg |= ISSET(t->c_cflag, CSTOPB) ?
UCYCOM_STOP_BITS_2 : UCYCOM_STOP_BITS_1;
cfg |= ISSET(t->c_cflag, PARENB) ?
UCYCOM_PARITY_ON : UCYCOM_PARITY_OFF;
cfg |= ISSET(t->c_cflag, PARODD) ?
UCYCOM_PARITY_ODD : UCYCOM_PARITY_EVEN;
}
/*
* 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.
*/
DPRINTF(("ucycomparam: l_modem\n"));
(void) (*tp->t_linesw->l_modem)(tp, 1 /* XXX carrier */ );
err = ucycom_configure(sc, baud, cfg);
return err;
}
static void
ucycomstop(struct tty *tp, int flag)
{
DPRINTF(("ucycomstop: flag=%d\n", flag));
}
static int
ucycomread(dev_t dev, struct uio *uio, int flag)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp = sc->sc_tty;
int err;
DPRINTF(("ucycomread: sc=%p, tp=%p, uio=%p, flag=%d\n", sc, tp, uio,
flag));
if (sc->sc_dying)
return EIO;
err = ((*tp->t_linesw->l_read)(tp, uio, flag));
return err;
}
static int
ucycomwrite(dev_t dev, struct uio *uio, int flag)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp = sc->sc_tty;
int err;
DPRINTF(("ucycomwrite: sc=%p, tp=%p, uio=%p, flag=%d\n", sc, tp, uio,
flag));
if (sc->sc_dying)
return EIO;
err = ((*tp->t_linesw->l_write)(tp, uio, flag));
return err;
}
static struct tty *
ucycomtty(dev_t dev)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp = sc->sc_tty;
DPRINTF(("ucycomtty: sc=%p, tp=%p\n", sc, tp));
return tp;
}
static int
ucycomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp = sc->sc_tty;
int err;
int s;
if (sc->sc_dying)
return EIO;
DPRINTF(("ucycomioctl: sc=%p, tp=%p, data=%p\n", sc, tp, data));
err = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l);
if (err != EPASSTHROUGH)
return err;
err = ttioctl(tp, cmd, data, flag, l);
if (err != EPASSTHROUGH)
return err;
err = 0;
DPRINTF(("ucycomioctl: our cmd=0x%08lx\n", cmd));
s = spltty();
switch (cmd) {
/* case TIOCSBRK:
ucycom_break(sc, 1);
break;
case TIOCCBRK:
ucycom_break(sc, 0);
break;
*/
case TIOCSDTR:
ucycom_dtr(sc, 1);
break;
case TIOCCDTR:
ucycom_dtr(sc, 0);
break;
case TIOCGFLAGS:
*(int *)data = sc->sc_swflags;
break;
case TIOCSFLAGS:
err = kauth_authorize_device_tty(l->l_cred,
KAUTH_DEVICE_TTY_PRIVSET, tp);
if (err)
break;
sc->sc_swflags = *(int *)data;
break;
case TIOCMSET:
case TIOCMBIS:
case TIOCMBIC:
tiocm_to_ucycom(sc, cmd, *(int *)data);
break;
case TIOCMGET:
*(int *)data = ucycom_to_tiocm(sc);
break;
default:
err = EPASSTHROUGH;
break;
}
splx(s);
return err;
}
static int
ucycompoll(dev_t dev, int events, struct lwp *l)
{
struct ucycom_softc *sc =
device_lookup_private(&ucycom_cd, UCYCOMUNIT(dev));
struct tty *tp = sc->sc_tty;
int err;
DPRINTF(("ucycompoll: sc=%p, tp=%p, events=%d, lwp=%p\n", sc, tp,
events, l));
if (sc->sc_dying)
return EIO;
err = ((*tp->t_linesw->l_poll)(tp, events, l));
return err;
}
Static int
ucycom_configure(struct ucycom_softc *sc, uint32_t baud, uint8_t cfg)
{
uint8_t report[5];
int err;
switch (baud) {
case 600:
case 1200:
case 2400:
case 4800:
case 9600:
case 19200:
case 38400:
case 57600:
#if 0
/*
* Stock chips only support standard baud rates in the 600 - 57600
* range, but higher rates can be achieved using custom firmware.
*/
case 115200:
case 153600:
case 192000:
#endif
break;
default:
return EINVAL;
}
DPRINTF(("ucycom_configure: setting %d baud, %d-%c-%d (%d)\n", baud,
5 + (cfg & UCYCOM_DATA_MASK),
(cfg & UCYCOM_PARITY_MASK) ?
((cfg & UCYCOM_PARITY_TYPE_MASK) ? 'O' : 'E') : 'N',
(cfg & UCYCOM_STOP_MASK) ? 2 : 1, cfg));
report[0] = baud & 0xff;
report[1] = (baud >> 8) & 0xff;
report[2] = (baud >> 16) & 0xff;
report[3] = (baud >> 24) & 0xff;
report[4] = cfg;
err = uhidev_set_report(sc->sc_hdev, UHID_FEATURE_REPORT,
report, sc->sc_flen);
if (err != 0) {
DPRINTF(("%s\n", usbd_errstr(err)));
return EIO;
}
sc->sc_baud = baud;
sc->sc_cfg = cfg;
#ifdef UCYCOM_DEBUG
ucycom_get_cfg(sc);
#endif
return 0;
}
Static void
ucycom_intr(void *cookie, void *ibuf, u_int len)
{
struct ucycom_softc *sc = cookie;
struct tty *tp = sc->sc_tty;
int (*rint)(int , struct tty *) = tp->t_linesw->l_rint;
uint8_t *cp = ibuf;
int s, n, st, chg;
/* We understand 8 byte and 32 byte input records */
switch (len) {
case 8:
n = cp[0] & UCYCOM_LMASK;
st = cp[0] & ~UCYCOM_LMASK;
cp++;
break;
case 32:
st = cp[0];
n = cp[1];
cp += 2;
break;
default:
DPRINTFN(3,("ucycom_intr: Unknown input report length\n"));
return;
}
#ifdef UCYCOM_DEBUG
if (ucycomdebug > 5) {
uint32_t i;
if (n != 0) {
DPRINTF(("ucycom_intr: ibuf[0..%d) =", n));
for (i = 0; i < n; i++)
DPRINTF((" %02x", cp[i]));
DPRINTF(("\n"));
}
}
#endif
/* Give characters to tty layer. */
s = spltty();
while (n-- > 0) {
DPRINTFN(7,("ucycom_intr: char=0x%02x\n", *cp));
if ((*rint)(*cp++, tp) == -1) {
/* XXX what should we do? */
aprint_error_dev(sc->sc_dev, "lost a character\n");
break;
}
}
splx(s);
chg = st ^ sc->sc_msr;
sc->sc_msr = st;
if (ISSET(chg, UCYCOM_DCD))
(*tp->t_linesw->l_modem)(tp,
ISSET(sc->sc_msr, UCYCOM_DCD));
}
Static void
tiocm_to_ucycom(struct ucycom_softc *sc, u_long how, int ttybits)
{
u_char combits;
u_char before = sc->sc_mcr;
combits = 0;
if (ISSET(ttybits, TIOCM_DTR))
SET(combits, UCYCOM_DTR);
if (ISSET(ttybits, TIOCM_RTS))
SET(combits, UCYCOM_RTS);
switch (how) {
case TIOCMBIC:
CLR(sc->sc_mcr, combits);
break;
case TIOCMBIS:
SET(sc->sc_mcr, combits);
break;
case TIOCMSET:
CLR(sc->sc_mcr, UCYCOM_DTR | UCYCOM_RTS);
SET(sc->sc_mcr, combits);
break;
}
if (before ^ sc->sc_mcr) {
DPRINTF(("tiocm_to_ucycom: something has changed\n"));
ucycom_set_status(sc);
}
}
Static int
ucycom_to_tiocm(struct ucycom_softc *sc)
{
u_char combits;
int ttybits = 0;
combits = sc->sc_mcr;
if (ISSET(combits, UCYCOM_DTR))
SET(ttybits, TIOCM_DTR);
if (ISSET(combits, UCYCOM_RTS))
SET(ttybits, TIOCM_RTS);
combits = sc->sc_msr;
if (ISSET(combits, UCYCOM_DCD))
SET(ttybits, TIOCM_CD);
if (ISSET(combits, UCYCOM_CTS))
SET(ttybits, TIOCM_CTS);
if (ISSET(combits, UCYCOM_DSR))
SET(ttybits, TIOCM_DSR);
if (ISSET(combits, UCYCOM_RI))
SET(ttybits, TIOCM_RI);
return ttybits;
}
Static void
ucycom_dtr(struct ucycom_softc *sc, int set)
{
uint8_t old;
old = sc->sc_mcr;
if (set)
SET(sc->sc_mcr, UCYCOM_DTR);
else
CLR(sc->sc_mcr, UCYCOM_DTR);
if (old ^ sc->sc_mcr)
ucycom_set_status(sc);
}
#if 0
Static void
ucycom_rts(struct ucycom_softc *sc, int set)
{
uint8_t old;
old = sc->sc_msr;
if (set)
SET(sc->sc_mcr, UCYCOM_RTS);
else
CLR(sc->sc_mcr, UCYCOM_RTS);
if (old ^ sc->sc_mcr)
ucycom_set_status(sc);
}
#endif
Static void
ucycom_set_status(struct ucycom_softc *sc)
{
int err;
if (sc->sc_olen != 8 && sc->sc_olen != 32) {
DPRINTFN(2,("ucycom_set_status: unknown output report "
"size (%zd)\n", sc->sc_olen));
return;
}
DPRINTF(("ucycom_set_status: %d\n", sc->sc_mcr));
memset(sc->sc_obuf, 0, sc->sc_olen);
sc->sc_obuf[0] = sc->sc_mcr;
err = uhidev_write(sc->sc_hdev, sc->sc_obuf, sc->sc_olen);
if (err) {
DPRINTF(("ucycom_set_status: err=%d\n", err));
}
}
#ifdef UCYCOM_DEBUG
Static void
ucycom_get_cfg(struct ucycom_softc *sc)
{
int err, cfg, baud;
uint8_t report[5];
err = uhidev_get_report(sc->sc_hdev, UHID_FEATURE_REPORT,
report, sc->sc_flen);
if (err) {
DPRINTF(("%s: failed\n", __func__));
return;
}
cfg = report[4];
baud = (report[3] << 24) + (report[2] << 16) + (report[1] << 8) +
report[0];
DPRINTF(("ucycom_get_cfg: device reports %d baud, %d-%c-%d (%d)\n",
baud, 5 + (cfg & UCYCOM_DATA_MASK),
(cfg & UCYCOM_PARITY_MASK) ?
((cfg & UCYCOM_PARITY_TYPE_MASK) ? 'O' : 'E') : 'N',
(cfg & UCYCOM_STOP_MASK) ? 2 : 1, cfg));
}
#endif
Static void
ucycom_cleanup(struct ucycom_softc *sc)
{
uint8_t *obuf;
DPRINTF(("ucycom_cleanup: closing uhidev\n"));
obuf = sc->sc_obuf;
sc->sc_obuf = NULL;
uhidev_close(sc->sc_hdev);
if (obuf != NULL)
kmem_free(obuf, sc->sc_olen);
}
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