static int
ucom_open(struct tty *tp)
{
struct ucom_softc *sc = tty_softc(tp);
int error;
mtx_assert(sc->sc_mtx, MA_OWNED);
if (sc->sc_flag & UCOM_FLAG_GONE) {
return (ENXIO);
}
if (sc->sc_flag & UCOM_FLAG_HL_READY) {
/* already opened */
return (0);
}
DPRINTF("tp = %p\n", tp);
if (sc->sc_callback->ucom_pre_open) {
/*
* give the lower layer a chance to disallow TTY open, for
* example if the device is not present:
*/
error = (sc->sc_callback->ucom_pre_open) (sc);
if (error) {
return (error);
}
}
sc->sc_flag |= UCOM_FLAG_HL_READY;
/* Disable transfers */
sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
sc->sc_lsr = 0;
sc->sc_msr = 0;
sc->sc_mcr = 0;
/* reset programmed line state */
sc->sc_pls_curr = 0;
sc->sc_pls_set = 0;
sc->sc_pls_clr = 0;
ucom_queue_command(sc, ucom_cfg_open, NULL,
&sc->sc_open_task[0].hdr,
&sc->sc_open_task[1].hdr);
/* Queue transfer enable command last */
ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
&sc->sc_start_task[0].hdr,
&sc->sc_start_task[1].hdr);
ucom_modem(tp, SER_DTR | SER_RTS, 0);
ucom_break(sc, 0);
ucom_status_change(sc);
return (0);
}
static void
ucom_close(struct tty *tp)
{
struct ucom_softc *sc = tty_softc(tp);
UCOM_MTX_ASSERT(sc, MA_OWNED);
DPRINTF("tp=%p\n", tp);
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
DPRINTF("tp=%p already closed\n", tp);
return;
}
ucom_shutdown(sc);
ucom_queue_command(sc, ucom_cfg_close, NULL,
&sc->sc_close_task[0].hdr,
&sc->sc_close_task[1].hdr);
sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW);
if (sc->sc_callback->ucom_stop_read) {
(sc->sc_callback->ucom_stop_read) (sc);
}
}
static int
ucom_close(struct ucom_softc *sc)
{
#ifdef USB_DEBUG
struct tty *tp = sc->sc_tty;
#endif
int error = 0;
DPRINTF("tp=%p\n", tp);
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
DPRINTF("tp=%p already closed\n", tp);
UCOM_MTX_UNLOCK(sc);
return (error);
}
ucom_shutdown(sc);
ucom_queue_command(sc, ucom_cfg_close, NULL,
&sc->sc_close_task[0].hdr,
&sc->sc_close_task[1].hdr);
sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW);
if (sc->sc_callback->ucom_stop_read) {
(sc->sc_callback->ucom_stop_read) (sc);
}
return (error);
}
void
ucom_status_change(struct ucom_softc *sc)
{
mtx_assert(sc->sc_mtx, MA_OWNED);
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
return;
}
DPRINTF("\n");
ucom_queue_command(sc, ucom_cfg_status_change, NULL,
&sc->sc_status_task[0].hdr,
&sc->sc_status_task[1].hdr);
}
void
ucom_status_change(struct ucom_softc *sc)
{
UCOM_MTX_ASSERT(sc, MA_OWNED);
if (sc->sc_flag & UCOM_FLAG_CONSOLE)
return; /* not supported */
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
return;
}
DPRINTF("\n");
ucom_queue_command(sc, ucom_cfg_status_change, NULL,
&sc->sc_status_task[0].hdr,
&sc->sc_status_task[1].hdr);
}
static void
ucom_line_state(struct ucom_softc *sc,
uint8_t set_bits, uint8_t clear_bits)
{
UCOM_MTX_ASSERT(sc, MA_OWNED);
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
return;
}
DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits);
/* update current programmed line state */
sc->sc_pls_curr |= set_bits;
sc->sc_pls_curr &= ~clear_bits;
sc->sc_pls_set |= set_bits;
sc->sc_pls_clr |= clear_bits;
/* defer driver programming */
ucom_queue_command(sc, ucom_cfg_line_state, NULL,
&sc->sc_line_state_task[0].hdr,
&sc->sc_line_state_task[1].hdr);
}
static int
ucom_param(struct tty *tp, struct termios *t)
{
struct ucom_softc *sc = tty_softc(tp);
uint8_t opened;
int error;
UCOM_MTX_ASSERT(sc, MA_OWNED);
opened = 0;
error = 0;
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
/* XXX the TTY layer should call "open()" first! */
/*
* Not quite: Its ordering is partly backwards, but
* some parameters must be set early in ttydev_open(),
* possibly before calling ttydevsw_open().
*/
error = ucom_open(tp);
if (error)
goto done;
opened = 1;
}
DPRINTF("sc = %p\n", sc);
/* Check requested parameters. */
if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) {
/* XXX c_ospeed == 0 is perfectly valid. */
DPRINTF("mismatch ispeed and ospeed\n");
error = EINVAL;
goto done;
}
t->c_ispeed = t->c_ospeed;
if (sc->sc_callback->ucom_pre_param) {
/* Let the lower layer verify the parameters */
error = (sc->sc_callback->ucom_pre_param) (sc, t);
if (error) {
DPRINTF("callback error = %d\n", error);
goto done;
}
}
/* Disable transfers */
sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
/* Queue baud rate programming command first */
ucom_queue_command(sc, ucom_cfg_param, t,
&sc->sc_param_task[0].hdr,
&sc->sc_param_task[1].hdr);
/* Queue transfer enable command last */
ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
&sc->sc_start_task[0].hdr,
&sc->sc_start_task[1].hdr);
if (t->c_cflag & CRTS_IFLOW) {
sc->sc_flag |= UCOM_FLAG_RTS_IFLOW;
} else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) {
sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW;
ucom_modem(tp, SER_RTS, 0);
}
done:
if (error) {
if (opened) {
ucom_close(tp);
}
}
return (error);
}
static int
ucom_param(struct tty *tp, struct termios *t)
{
struct ucom_softc *sc = tty_softc(tp);
uint8_t opened;
int error;
mtx_assert(sc->sc_mtx, MA_OWNED);
opened = 0;
error = 0;
if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) {
/* XXX the TTY layer should call "open()" first! */
error = ucom_open(tp);
if (error) {
goto done;
}
opened = 1;
}
DPRINTF("sc = %p\n", sc);
/* Check requested parameters. */
if (t->c_ospeed < 0) {
DPRINTF("negative ospeed\n");
error = EINVAL;
goto done;
}
if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) {
DPRINTF("mismatch ispeed and ospeed\n");
error = EINVAL;
goto done;
}
t->c_ispeed = t->c_ospeed;
if (sc->sc_callback->ucom_pre_param) {
/* Let the lower layer verify the parameters */
error = (sc->sc_callback->ucom_pre_param) (sc, t);
if (error) {
DPRINTF("callback error = %d\n", error);
goto done;
}
}
/* Disable transfers */
sc->sc_flag &= ~UCOM_FLAG_GP_DATA;
/* Queue baud rate programming command first */
ucom_queue_command(sc, ucom_cfg_param, t,
&sc->sc_param_task[0].hdr,
&sc->sc_param_task[1].hdr);
/* Queue transfer enable command last */
ucom_queue_command(sc, ucom_cfg_start_transfers, NULL,
&sc->sc_start_task[0].hdr,
&sc->sc_start_task[1].hdr);
if (t->c_cflag & CRTS_IFLOW) {
sc->sc_flag |= UCOM_FLAG_RTS_IFLOW;
} else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) {
sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW;
ucom_modem(tp, SER_RTS, 0);
}
done:
if (error) {
if (opened) {
ucom_close(tp);
}
}
return (error);
}