/*
* Start output, after a stop.
*/
void
mtty_start(struct tty *tp)
{
struct mtty_softc *ms = mtty_cd.cd_devs[MAGMA_CARD(tp->t_dev)];
struct mtty_port *mp = &ms->ms_port[MAGMA_PORT(tp->t_dev)];
int s;
s = spltty();
/* we only need to do something if we are not already busy
* or delaying or stopped
*/
if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) {
/* if we are sleeping and output has drained below
* low water mark, awaken
*/
ttwakeupwr(tp);
/* if something to send, start transmitting
*/
if (tp->t_outq.c_cc) {
mp->mp_txc = ndqb(&tp->t_outq, 0);
mp->mp_txp = tp->t_outq.c_cf;
SET(tp->t_state, TS_BUSY);
cd1400_enable_transmitter(mp->mp_cd1400, mp->mp_channel);
}
}
splx(s);
}
void
dartstart(struct tty *tp)
{
struct dartsoftc *sc;
dev_t dev;
int s;
u_int port, chip;
int c, tries;
bus_addr_t ptaddr;
if ((tp->t_state & TS_ISOPEN) == 0)
return;
dev = tp->t_dev;
chip = DART_CHIP(dev);
port = DART_PORT(dev);
sc = (struct dartsoftc *)dart_cd.cd_devs[chip];
ptaddr = port == A_PORT ? DART_A_BASE : DART_B_BASE;
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
goto bail;
ttwakeupwr(tp);
if (tp->t_outq.c_cc == 0)
goto bail;
tp->t_state |= TS_BUSY;
while (tp->t_outq.c_cc != 0) {
/* load transmitter until it is full */
for (tries = 10000; tries != 0; tries --)
if (dart_read(sc, ptaddr + DART_SRA) & TXRDY)
break;
if (tries == 0) {
timeout_add(&tp->t_rstrt_to, 1);
tp->t_state |= TS_TIMEOUT;
break;
} else {
c = getc(&tp->t_outq);
dart_write(sc, ptaddr + DART_TBA, c & 0xff);
sc->sc_sv_reg->sv_imr |=
port == A_PORT ? ITXRDYA : ITXRDYB;
dart_write(sc, DART_IMR, sc->sc_sv_reg->sv_imr);
}
}
tp->t_state &= ~TS_BUSY;
bail:
splx(s);
}
void
vioconstart(struct tty *tp)
{
struct viocon_softc *sc = dev2sc(tp->t_dev);
struct virtio_softc *vsc;
struct viocon_port *vp = dev2port(tp->t_dev);
struct virtqueue *vq;
u_char *buf;
int s, cnt, slot, ret, ndone;
vsc = sc->sc_virtio;
vq = vp->vp_tx;
s = spltty();
ndone = viocon_tx_drain(vp, vq);
if (ISSET(tp->t_state, TS_BUSY)) {
if (ndone > 0)
CLR(tp->t_state, TS_BUSY);
else
goto out;
}
if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP))
goto out;
if (tp->t_outq.c_cc == 0)
goto out;
ndone = 0;
while (tp->t_outq.c_cc > 0) {
ret = virtio_enqueue_prep(vq, &slot);
if (ret == EAGAIN)
break;
KASSERT(ret == 0);
ret = virtio_enqueue_reserve(vq, slot, 1);
KASSERT(ret == 0);
buf = vp->vp_tx_buf + slot * BUFSIZE;
cnt = q_to_b(&tp->t_outq, buf, BUFSIZE);
bus_dmamap_sync(vsc->sc_dmat, vp->vp_dmamap,
vp->vp_tx_buf - vp->vp_rx_buf + slot * BUFSIZE, cnt,
BUS_DMASYNC_PREWRITE);
virtio_enqueue_p(vq, slot, vp->vp_dmamap,
vp->vp_tx_buf - vp->vp_rx_buf + slot * BUFSIZE, cnt, 1);
virtio_enqueue_commit(vsc, vq, slot, 0);
ndone++;
}
if (ret == EAGAIN)
SET(tp->t_state, TS_BUSY);
if (ndone > 0)
virtio_notify(vsc, vq);
ttwakeupwr(tp);
out:
splx(s);
}
void
vconsstart(struct tty *tp)
{
int s;
s = spltty();
if (tp->t_state & (TS_TTSTOP | TS_BUSY)) {
splx(s);
return;
}
ttwakeupwr(tp);
tp->t_state |= TS_BUSY;
while (tp->t_outq.c_cc != 0)
vcons_cnputc(tp->t_dev, getc(&tp->t_outq));
tp->t_state &= ~TS_BUSY;
splx(s);
}
/*
* Start or restart transmission.
*/
void
zsstart(struct tty *tp)
{
struct zstty_softc *zst = zs_device_lookup(&zstty_cd, ZSUNIT(tp->t_dev));
struct zs_chanstate *cs = zst->zst_cs;
u_char *tba;
int tbc, rr0;
int s;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (zst->zst_tx_stopped)
goto out;
ttwakeupwr(tp);
if (tp->t_outq.c_cc == 0)
goto out;
/* Grab the first contiguous region of buffer space. */
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
#if IPL_ZS != IPL_TTY
(void)splzs();
#endif
zst->zst_tba = tba;
zst->zst_tbc = tbc;
SET(tp->t_state, TS_BUSY);
zst->zst_tx_busy = 1;
do {
rr0 = zs_read_csr(cs);
if ((rr0 & ZSRR0_TX_READY) == 0)
break;
zs_write_data(cs, *zst->zst_tba);
zst->zst_tbc--;
zst->zst_tba++;
} while (zst->zst_tbc > 0);
out:
splx(s);
}
int
ptcread(dev_t dev, struct uio *uio, int flag)
{
struct pt_softc *pti = pt_softc[minor(dev)];
struct tty *tp = pti->pt_tty;
char buf[BUFSIZ];
int error = 0, cc, bufcc = 0;
/*
* We want to block until the slave
* is open, and there's something to read;
* but if we lost the slave or we're NBIO,
* then return the appropriate error instead.
*/
for (;;) {
if (tp->t_state&TS_ISOPEN) {
if (pti->pt_flags&PF_PKT && pti->pt_send) {
error = ureadc((int)pti->pt_send, uio);
if (error)
return (error);
if (pti->pt_send & TIOCPKT_IOCTL) {
cc = MIN(uio->uio_resid,
sizeof(tp->t_termios));
error = uiomove(&tp->t_termios, cc, uio);
if (error)
return (error);
}
pti->pt_send = 0;
return (0);
}
if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) {
error = ureadc((int)pti->pt_ucntl, uio);
if (error)
return (error);
pti->pt_ucntl = 0;
return (0);
}
if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
break;
}
if ((tp->t_state&TS_CARR_ON) == 0)
return (0); /* EOF */
if (flag & IO_NDELAY)
return (EWOULDBLOCK);
error = tsleep(&tp->t_outq.c_cf, TTIPRI | PCATCH,
ttyin, 0);
if (error)
return (error);
}
if (pti->pt_flags & (PF_PKT|PF_UCNTL))
error = ureadc(0, uio);
while (uio->uio_resid > 0 && error == 0) {
cc = MIN(uio->uio_resid, BUFSIZ);
cc = q_to_b(&tp->t_outq, buf, cc);
if (cc > bufcc)
bufcc = cc;
if (cc <= 0)
break;
error = uiomove(buf, cc, uio);
}
ttwakeupwr(tp);
if (bufcc)
bzero(buf, bufcc);
return (error);
}
void
ucomstart(struct tty *tp)
{
struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
usbd_status err;
int s;
u_char *data;
int cnt;
if (sc == NULL || usbd_is_dying(sc->sc_uparent))
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state));
goto out;
}
if (sc->sc_tx_stopped)
goto out;
ttwakeupwr(tp);
if (tp->t_outq.c_cc == 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(("ucomstart: cnt==0\n"));
goto out;
}
SET(tp->t_state, TS_BUSY);
if (cnt > sc->sc_obufsize) {
DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
cnt = sc->sc_obufsize;
}
if (sc->sc_methods->ucom_write != NULL)
sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno,
sc->sc_obuf, data, &cnt);
else
memcpy(sc->sc_obuf, data, cnt);
DPRINTFN(4,("ucomstart: %d chars\n", cnt));
#ifdef DIAGNOSTIC
if (sc->sc_oxfer == NULL) {
printf("ucomstart: null oxfer\n");
goto out;
}
#endif
if (sc->sc_bulkout_pipe != NULL) {
usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
(void *)sc, sc->sc_obuf, cnt,
USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
} else {
usbd_setup_xfer(sc->sc_oxfer, sc->sc_opipe,
(void *)sc, sc->sc_obuf, cnt,
USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
}
/* What can we do on error? */
err = usbd_transfer(sc->sc_oxfer);
#ifdef DIAGNOSTIC
if (err != USBD_IN_PROGRESS)
printf("ucomstart: err=%s\n", usbd_errstr(err));
#endif
out:
splx(s);
}