static void
clmpcc_start(struct tty *tp)
{
struct clmpcc_softc *sc =
device_lookup_private(&clmpcc_cd, CLMPCCUNIT(tp->t_dev));
struct clmpcc_chan *ch = &sc->sc_chans[CLMPCCCHAN(tp->t_dev)];
u_int oldch;
int s;
s = spltty();
if ( ISCLR(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY) ) {
ttypull(tp);
if ( ISSET(ch->ch_flags, CLMPCC_FLG_START_BREAK |
CLMPCC_FLG_END_BREAK) ||
tp->t_outq.c_cc > 0 ) {
if ( ISCLR(ch->ch_flags, CLMPCC_FLG_START_BREAK |
CLMPCC_FLG_END_BREAK) ) {
ch->ch_obuf_addr = tp->t_outq.c_cf;
ch->ch_obuf_size = ndqb(&tp->t_outq, 0);
}
/* Enable TX empty interrupts */
oldch = clmpcc_select_channel(ch->ch_sc, ch->ch_car);
clmpcc_wrreg(ch->ch_sc, CLMPCC_REG_IER,
clmpcc_rdreg(ch->ch_sc, CLMPCC_REG_IER) |
CLMPCC_IER_TX_EMPTY);
clmpcc_select_channel(ch->ch_sc, oldch);
SET(tp->t_state, TS_BUSY);
}
}
splx(s);
}
static void
pconsstart(struct tty *tp)
{
struct clist *cl;
int s, len;
uint8_t buf[OFBURSTLEN];
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
splx(s);
return;
}
tp->t_state |= TS_BUSY;
splx(s);
cl = &tp->t_outq;
len = q_to_b(cl, buf, OFBURSTLEN);
prom_putstr(buf, len);
s = spltty();
tp->t_state &= ~TS_BUSY;
if (ttypull(tp)) {
tp->t_state |= TS_TIMEOUT;
callout_schedule(&tp->t_rstrt_ch, 1);
}
splx(s);
}
static void
biconsdev_output(struct tty *tp)
{
int s, n;
char buf[OBUFSIZ];
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
splx(s);
return;
}
tp->t_state |= TS_BUSY;
splx(s);
n = q_to_b(&tp->t_outq, buf, sizeof(buf));
bicons_putn(buf, n);
s = spltty();
tp->t_state &= ~TS_BUSY;
/* Come back if there's more to do */
if (ttypull(tp)) {
tp->t_state |= TS_TIMEOUT;
callout_schedule(&tp->t_rstrt_ch, 1);
}
splx(s);
}
static void
kdstart(struct tty *tp)
{
int s1, s2;
s1 = splsoftclock();
s2 = spltty();
if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT))
goto out;
if (ttypull(tp)) {
tp->t_state |= TS_BUSY;
if ((s1 & PSR_PIL) == 0) {
/* called at level zero - update screen now. */
splx(s2);
kd_putfb(tp);
s2 = spltty();
tp->t_state &= ~TS_BUSY;
} else {
/* called at interrupt level - do it later */
callout_schedule(&tp->t_rstrt_ch, 0);
}
}
out:
splx(s2);
splx(s1);
}
void
dzstart(struct tty *tp)
{
struct dz_softc *sc;
struct clist *cl;
int unit, s;
unit = DZ_I2C(minor(tp->t_dev));
sc = device_lookup_private(&dz_cd, unit);
s = spltty();
if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) {
splx(s);
return;
}
cl = &tp->t_outq;
ttypull(tp);
if (cl->c_cc == 0) {
splx(s);
return;
}
tp->t_state |= TS_BUSY;
/* was idle, get it started */
dzxint(sc,USI_TXRDY);
splx(s);
}
static void
ucomstart(struct tty *tp)
{
struct ucom_softc *sc = device_lookup_private(&ucom_cd,
UCOMUNIT(tp->t_dev));
struct ucom_buffer *ub;
int s;
u_char *data;
int cnt;
if (sc->sc_dying)
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;
if (!ttypull(tp))
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;
}
ub = SIMPLEQ_FIRST(&sc->sc_obuff_free);
KASSERT(ub != NULL);
SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link);
if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL)
SET(tp->t_state, TS_BUSY);
if (cnt > sc->sc_obufsize)
cnt = sc->sc_obufsize;
if (sc->sc_methods->ucom_write != NULL)
sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno,
ub->ub_data, data, &cnt);
else
memcpy(ub->ub_data, data, cnt);
ub->ub_len = cnt;
ub->ub_index = 0;
SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link);
softint_schedule(sc->sc_si);
out:
splx(s);
}
void
sacomstart(struct tty *tp)
{
struct sacom_softc *sc =
device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev));
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
int s;
if (COM_ISALIVE(sc) == 0)
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
{
u_char *tba;
int tbc;
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
(void)splserial();
COM_LOCK(sc);
sc->sc_tba = tba;
sc->sc_tbc = tbc;
}
SET(tp->t_state, TS_BUSY);
sc->sc_tx_busy = 1;
/* Enable transmit completion interrupts if necessary. */
if (!ISSET(sc->sc_cr3, CR3_TIE)) {
SET(sc->sc_cr3, CR3_TIE);
bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3);
}
/* Output the first chunk of the contiguous buffer. */
sacom_filltx(sc);
COM_UNLOCK(sc);
out:
splx(s);
return;
}
/*
* czttystart:
*
* Start or restart transmission.
*/
static void
czttystart(struct tty *tp)
{
struct cztty_softc *sc = CZTTY_SOFTC(tp->t_dev);
int s;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (!ttypull(tp))
goto out;
cztty_transmit(sc, tp);
out:
splx(s);
}
/*
* Start transmission
*/
qvstart(register struct tty *tp)
{
register int unit, c;
register struct tty *tp0;
int s;
unit = minor(tp->t_dev);
#ifdef CONS_HACK
tp0 = &qv_tty[(unit&0xfc)+QVPCONS];
#endif
unit = QVCHAN(unit);
s = spl5();
/*
* If it's currently active, or delaying, no need to do anything.
*/
if (tp->t_state&(TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
goto out;
/*
* Display chars until the queue is empty, if the second subchannel
* is open direct them there. Drop characters from subchannels other
* than 0 on the floor.
*/
while( tp->t_outq.c_cc ) {
c = getc(&tp->t_outq);
if (unit == QVKEYBOARD)
#ifdef CONS_HACK
if( tp0->t_state & TS_ISOPEN ){
(*tp0->t_linesw->l_rint)(c, tp0);
} else
#endif
qvputchar( c & 0xff );
}
/*
* Position the cursor to the next character location.
*/
qv_pos_cur( qv_scn->col*8, qv_scn->row*15 );
/*
* If there are sleepers, and output has drained below low
* water mark, wake up the sleepers.
*/
ttypull(tp);
tp->t_state &= ~TS_BUSY;
out:
splx(s);
}
void
sscomstart(struct tty *tp)
{
struct sscom_softc *sc = device_lookup_private(&sscom_cd, SSCOMUNIT(tp->t_dev));
int s;
if (SSCOM_ISALIVE(sc) == 0)
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (sc->sc_tx_stopped)
goto out;
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
{
u_char *tba;
int tbc;
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
(void)splserial();
SSCOM_LOCK(sc);
sc->sc_tba = tba;
sc->sc_tbc = tbc;
}
SET(tp->t_state, TS_BUSY);
sc->sc_tx_busy = 1;
/* Output the first chunk of the contiguous buffer. */
sscom_output_chunk(sc);
/* Enable transmit completion interrupts if necessary. */
if ((sc->sc_hwflags & SSCOM_HW_TXINT) == 0)
sscom_enable_txint(sc);
SSCOM_UNLOCK(sc);
out:
splx(s);
return;
}
static void
at91usart_start(struct tty *tp)
{
struct at91usart_softc *sc
= device_lookup_private(&at91usart_cd, COMUNIT(tp->t_dev));
int s;
if (COM_ISALIVE(sc) == 0) {
DPRINTFN(5, ("%s: %s / COM_ISALIVE == 0\n", device_xname(sc->sc_dev), __FUNCTION__));
return;
}
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
DPRINTFN(5, ("%s: %s: TS_BUSY || TS_TIMEOUT || TS_TTSTOP\n", device_xname(sc->sc_dev), __FUNCTION__));
goto out;
}
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
{
u_char *tba;
int tbc;
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
sc->sc_tba = tba;
sc->sc_tbc = tbc;
}
SET(tp->t_state, TS_BUSY);
/* Output the first chunk of the contiguous buffer. */
at91usart_filltx(sc);
at91usart_writereg(sc, US_IER, sc->sc_ier);
DPRINTFN(5, ("%s: %s, ier=%08x (csr=%08x)\n", device_xname(sc->sc_dev), __FUNCTION__, sc->sc_ier, at91usart_readreg(sc, US_CSR)));
out:
splx(s);
return;
}
static void
at91dbgu_start(struct tty *tp)
{
struct at91dbgu_softc *sc
= device_lookup_private(&at91dbgu_cd, COMUNIT(tp->t_dev));
int s;
if (COM_ISALIVE(sc) == 0)
return;
s = spltty();
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
goto out;
if (sc->sc_tx_stopped)
goto out;
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
{
u_char *tba;
int tbc;
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
(void)splserial();
sc->sc_tba = tba;
sc->sc_tbc = tbc;
}
SET(tp->t_state, TS_BUSY);
sc->sc_tx_busy = 1;
/* Output the first chunk of the contiguous buffer. */
at91dbgu_filltx(sc);
SET(sc->sc_ier, DBGU_INT_TXRDY);
DBGUREG(DBGU_IER) = DBGU_INT_TXRDY;
out:
splx(s);
return;
}
static void
dlstart(struct tty *tp)
{
struct dl_softc *sc = device_lookup_private(&dl_cd, minor(tp->t_dev));
int s = spltty();
if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
goto out;
if (!ttypull(tp))
goto out;
if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) {
tp->t_state |= TS_BUSY;
DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq));
}
out:
splx(s);
return;
}
void
uart_start(struct tty *tp)
{
int s,i,cnt;
s = spltty();
if (tp->t_state & (TS_TTSTOP | TS_BUSY))
goto out;
ttypull(tp);
tp->t_state |= TS_BUSY;
while (tp->t_outq.c_cc != 0) {
cnt = ndqb(&tp->t_outq, 0);
for (i=0; i<cnt; i++)
uart_cnputc(0,tp->t_outq.c_cf[i]);
ndflush(&tp->t_outq, cnt);
}
tp->t_state &= ~TS_BUSY;
out:
splx(s);
}
void
arcbios_tty_start(struct tty *tp)
{
u_long count;
int s;
s = spltty();
if (tp->t_state & (TS_TTSTOP | TS_BUSY))
goto out;
ttypull(tp);
tp->t_state |= TS_BUSY;
while (tp->t_outq.c_cc != 0) {
arcbios_Write(ARCBIOS_STDOUT, tp->t_outq.c_cf,
ndqb(&tp->t_outq, 0), &count);
ndflush(&tp->t_outq, count);
}
tp->t_state &= ~TS_BUSY;
out:
splx(s);
}
STATIC void
gtmpscstart(struct tty *tp)
{
struct gtmpsc_softc *sc;
unsigned char *tba;
unsigned int unit;
int s, tbc;
unit = GTMPSCUNIT(tp->t_dev);
sc = device_lookup_private(>mpsc_cd, unit);
if (sc == NULL)
return;
s = spltty();
if (ISSET(tp->t_state, TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
goto out;
if (sc->sc_tx_stopped)
goto out;
if (!ttypull(tp))
goto out;
/* Grab the first contiguous region of buffer space. */
tba = tp->t_outq.c_cf;
tbc = ndqb(&tp->t_outq, 0);
mutex_spin_enter(&sc->sc_lock);
sc->sc_tba = tba;
sc->sc_tbc = tbc;
sdma_imask |= SDMA_INTR_TXBUF(sc->sc_unit);
gt_sdma_imask(device_parent(sc->sc_dev), sdma_imask);
SET(tp->t_state, TS_BUSY);
sc->sc_tx_busy = 1;
gtmpsc_write(sc);
mutex_spin_exit(&sc->sc_lock);
out:
splx(s);
}
void
stty_start(struct tty *tp)
{
struct stty_softc *stc = device_lookup_private(&stty_cd,
SPIF_CARD(tp->t_dev));
struct stty_port *sp = &stc->sc_port[SPIF_PORT(tp->t_dev)];
struct spif_softc *sc = sp->sp_sc;
int s;
s = spltty();
if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) {
if (ttypull(tp)) {
sp->sp_txc = ndqb(&tp->t_outq, 0);
sp->sp_txp = tp->t_outq.c_cf;
SET(tp->t_state, TS_BUSY);
STC_WRITE(sc, STC_CAR, sp->sp_channel);
STC_WRITE(sc, STC_SRER,
STC_READ(sc, STC_SRER) | CD180_SRER_TXD);
}
}
splx(s);
}
/*
* Start output, after a stop.
*/
void
mtty_start(struct tty *tp)
{
struct mtty_softc *ms = device_lookup_private(&mtty_cd,
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 (ttypull(tp)) {
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
itestart(struct tty *tp)
{
struct clist *rbp;
struct ite_softc *ip;
u_char buf[ITEBURST];
int s, len;
ip = getitesp(tp->t_dev);
KDASSERT(tp);
s = spltty(); {
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
goto out;
tp->t_state |= TS_BUSY;
rbp = &tp->t_outq;
len = q_to_b(rbp, buf, ITEBURST);
} splx(s);
/* Here is a really good place to implement pre/jumpscroll() */
ite_putstr(buf, len, tp->t_dev);
s = spltty(); {
tp->t_state &= ~TS_BUSY;
/* we have characters remaining. */
if (ttypull(tp)) {
tp->t_state |= TS_TIMEOUT;
callout_schedule(&tp->t_rstrt_ch, 1);
}
}
out:
splx(s);
}
void
xencons_start(struct tty *tp)
{
struct clist *cl;
int s;
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
goto out;
tp->t_state |= TS_BUSY;
splx(s);
/*
* We need to do this outside spl since it could be fairly
* expensive and we don't want our serial ports to overflow.
*/
cl = &tp->t_outq;
if (xendomain_is_dom0()) {
int len, r;
u_char buf[XENCONS_BURST+1];
len = q_to_b(cl, buf, XENCONS_BURST);
while (len > 0) {
r = HYPERVISOR_console_io(CONSOLEIO_write, len, buf);
if (r <= 0)
break;
len -= r;
}
} else {
XENCONS_RING_IDX cons, prod, len;
#define XNC_OUT (xencons_interface->out)
cons = xencons_interface->out_cons;
prod = xencons_interface->out_prod;
xen_rmb();
while (prod != cons + sizeof(xencons_interface->out)) {
if (MASK_XENCONS_IDX(prod, XNC_OUT) <
MASK_XENCONS_IDX(cons, XNC_OUT)) {
len = MASK_XENCONS_IDX(cons, XNC_OUT) -
MASK_XENCONS_IDX(prod, XNC_OUT);
} else {
len = sizeof(XNC_OUT) -
MASK_XENCONS_IDX(prod, XNC_OUT);
}
len = q_to_b(cl, __UNVOLATILE(
&XNC_OUT[MASK_XENCONS_IDX(prod, XNC_OUT)]), len);
if (len == 0)
break;
prod = prod + len;
}
xen_wmb();
xencons_interface->out_prod = prod;
xen_wmb();
hypervisor_notify_via_evtchn(xen_start_info.console.domU.evtchn);
#undef XNC_OUT
}
s = spltty();
tp->t_state &= ~TS_BUSY;
if (ttypull(tp)) {
tp->t_state |= TS_TIMEOUT;
callout_schedule(&tp->t_rstrt_ch, 1);
}
out:
splx(s);
}