Пример #1
0
Static void
ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
{
	struct ucom_softc *sc = (struct ucom_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 lostcc;
	int s;

	DPRINTF(("ucomreadcb: status = %d\n", status));

	if (status != USBD_NORMAL_COMPLETION) {
		if (!(sc->sc_state & UCS_RXSTOP))
			printf("%s: ucomreadcb: %s\n",
			       USBDEVNAME(sc->sc_dev), usbd_errstr(status));
		if (status == USBD_STALLED)
			usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
		/* XXX we should restart after some delay. */
		return;
	}

	usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL);
	DPRINTF(("ucomreadcb: got %d chars, tp = %p\n", cc, tp));
	if (cc == 0)
		goto resubmit;

	if (sc->sc_callback->ucom_read != NULL)
		sc->sc_callback->ucom_read(sc->sc_parent, sc->sc_portno,
					   &cp, &cc);

	if (cc > sc->sc_ibufsize) {
		printf("%s: invalid receive data size, %d chars\n",
		       USBDEVNAME(sc->sc_dev), cc);
		goto resubmit;
	}
	if (cc < 1)
		goto resubmit;

	s = spltty();
	if (tp->t_state & TS_CAN_BYPASS_L_RINT) {
		if (tp->t_rawq.c_cc + cc > tp->t_ihiwat
		    && (sc->sc_state & UCS_RTS_IFLOW
			|| tp->t_iflag & IXOFF)
		    && !(tp->t_state & TS_TBLOCK))
			ttyblock(tp);
		lostcc = b_to_q((char *)cp, cc, &tp->t_rawq);
		tp->t_rawcc += cc;
		ttwakeup(tp);
		if (tp->t_state & TS_TTSTOP
		    && (tp->t_iflag & IXANY
			|| tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
			tp->t_state &= ~TS_TTSTOP;
			tp->t_lflag &= ~FLUSHO;
			ucomstart(tp);
		}
		if (lostcc > 0)
			printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev),
			       lostcc);
	} else {
		/* Give characters to tty layer. */
		while (cc > 0) {
			DPRINTFN(7, ("ucomreadcb: char = 0x%02x\n", *cp));
			if ((*rint)(*cp, tp) == -1) {
				/* XXX what should we do? */
				printf("%s: lost %d chars\n",
				       USBDEVNAME(sc->sc_dev), cc);
				break;
			}
			cc--;
			cp++;
		}
	}
	splx(s);

    resubmit:
	err = ucomstartread(sc);
	if (err) {
		printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev));
		/* XXX what should we dow now? */
	}

	if ((sc->sc_state & UCS_RTS_IFLOW) && !ISSET(sc->sc_mcr, UMCR_RTS)
	    && !(tp->t_state & TS_TBLOCK))
		ucomctl(sc, UMCR_RTS, DMBIS);
}
Пример #2
0
void
si_intr(void *arg)
{
	struct si_softc *sc;
	struct si_port *pp;
	volatile struct si_channel *ccbp;
	struct tty *tp;
	volatile caddr_t maddr;
	BYTE op, ip;
	int x, card, port, n, i, isopen;
	volatile BYTE *z;
	BYTE c;

	sc = arg;

	DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "si_intr\n"));
	if (in_intr)
		return;
	in_intr = 1;

	/*
	 * When we get an int we poll all the channels and do ALL pending
	 * work, not just the first one we find. This allows all cards to
	 * share the same vector.
	 *
	 * XXX - But if we're sharing the vector with something that's NOT
	 * a SI/XIO/SX card, we may be making more work for ourselves.
	 */
	for (card = 0; card < si_numunits; card++) {
		sc = devclass_get_softc(si_devclass, card);
		if (sc == NULL || sc->sc_type == SIEMPTY)
			continue;

		/*
		 * First, clear the interrupt
		 */
		switch(sc->sc_type) {
		case SIHOST:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
							/* flag nothing pending */
			*(maddr+SIINTCL) = 0x00;	/* Set IRQ clear */
			*(maddr+SIINTCL_CL) = 0x00;	/* Clear IRQ clear */
			break;
		case SIHOST2:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			*(maddr+SIPLIRQCLR) = 0x00;
			*(maddr+SIPLIRQCLR) = 0x10;
			break;
		case SIPCI:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			*(maddr+SIPCIINTCL) = 0x0;
			break;
		case SIJETPCI:	/* fall through to JETISA case */
		case SIJETISA:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			*(maddr+SIJETINTCL) = 0x0;
			break;
#ifdef DEV_EISA
		case SIEISA:
			maddr = sc->sc_maddr;
			((volatile struct si_reg *)maddr)->int_pending = 0;
			(void)inb(sc->sc_iobase + 3);
			break;
#endif
		case SIEMPTY:
		default:
			continue;
		}
		((volatile struct si_reg *)maddr)->int_scounter = 0;

		/*
		 * check each port
		 */
		for (pp = sc->sc_ports, port = 0; port < sc->sc_nport;
		     pp++, port++) {
			ccbp = pp->sp_ccb;
			tp = pp->sp_tty;

			/*
			 * See if a command has completed ?
			 */
			if (ccbp->hi_stat != pp->sp_pend) {
				DPRINT((pp, DBG_INTR,
					"si_intr hi_stat = 0x%x, pend = %d\n",
					ccbp->hi_stat, pp->sp_pend));
				switch(pp->sp_pend) {
				case LOPEN:
				case MPEND:
				case MOPEN:
				case CONFIG:
				case SBREAK:
				case EBREAK:
					pp->sp_pend = ccbp->hi_stat;
						/* sleeping in si_command */
					wakeup(&pp->sp_state);
					break;
				default:
					pp->sp_pend = ccbp->hi_stat;
				}
			}

			/*
			 * Continue on if it's closed
			 */
			if (ccbp->hi_stat == IDLE_CLOSE) {
				continue;
			}

			/*
			 * Do modem state change if not a local device
			 */
			si_modem_state(pp, tp, ccbp->hi_ip);

			/*
			 * Check to see if we should 'receive' characters.
			 */
			if (tp->t_state & TS_CONNECTED &&
			    tp->t_state & TS_ISOPEN)
				isopen = 1;
			else
				isopen = 0;

			/*
			 * Do input break processing
			 */
			if (ccbp->hi_state & ST_BREAK) {
				if (isopen) {
				    ttyld_rint(tp, TTY_BI);
				}
				ccbp->hi_state &= ~ST_BREAK;   /* A Bit iffy this */
				DPRINT((pp, DBG_INTR, "si_intr break\n"));
			}

			/*
			 * Do RX stuff - if not open then dump any characters.
			 * XXX: This is VERY messy and needs to be cleaned up.
			 *
			 * XXX: can we leave data in the host adapter buffer
			 * when the clists are full?  That may be dangerous
			 * if the user cannot get an interrupt signal through.
			 */

	more_rx:	/* XXX Sorry. the nesting was driving me bats! :-( */

			if (!isopen) {
				ccbp->hi_rxopos = ccbp->hi_rxipos;
				goto end_rx;
			}

			/*
			 * If the tty input buffers are blocked, stop emptying
			 * the incoming buffers and let the auto flow control
			 * assert..
			 */
			if (tp->t_state & TS_TBLOCK) {
				goto end_rx;
			}

			/*
			 * Process read characters if not skipped above
			 */
			op = ccbp->hi_rxopos;
			ip = ccbp->hi_rxipos;
			c = ip - op;
			if (c == 0) {
				goto end_rx;
			}

			n = c & 0xff;
			if (n > 250)
				n = 250;

			DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
						n, op, ip));

			/*
			 * Suck characters out of host card buffer into the
			 * "input staging buffer" - so that we dont leave the
			 * host card in limbo while we're possibly echoing
			 * characters and possibly flushing input inside the
			 * ldisc l_rint() routine.
			 */
			if (n <= SI_BUFFERSIZE - op) {

				DPRINT((pp, DBG_INTR, "\tsingle copy\n"));
				z = ccbp->hi_rxbuf + op;
				si_vbcopy(z, si_rxbuf, n);

				op += n;
			} else {
				x = SI_BUFFERSIZE - op;

				DPRINT((pp, DBG_INTR, "\tdouble part 1 %d\n", x));
				z = ccbp->hi_rxbuf + op;
				si_vbcopy(z, si_rxbuf, x);

				DPRINT((pp, DBG_INTR, "\tdouble part 2 %d\n",
					n - x));
				z = ccbp->hi_rxbuf;
				si_vbcopy(z, si_rxbuf + x, n - x);

				op += n;
			}

			/* clear collected characters from buffer */
			ccbp->hi_rxopos = op;

			DPRINT((pp, DBG_INTR, "n = %d, op = %d, ip = %d\n",
						n, op, ip));

			/*
			 * at this point...
			 * n = number of chars placed in si_rxbuf
			 */

			/*
			 * Avoid the grotesquely inefficient lineswitch
			 * routine (ttyinput) in "raw" mode. It usually
			 * takes about 450 instructions (that's without
			 * canonical processing or echo!). slinput is
			 * reasonably fast (usually 40 instructions
			 * plus call overhead).
			 */
			if (tp->t_state & TS_CAN_BYPASS_L_RINT) {

				/* block if the driver supports it */
				if (tp->t_rawq.c_cc + n >= SI_I_HIGH_WATER &&
				    (tp->t_cflag & CRTS_IFLOW ||
				     tp->t_iflag & IXOFF) &&
				    !(tp->t_state & TS_TBLOCK))
					ttyblock(tp);

				tk_nin += n;
				tk_rawcc += n;
				tp->t_rawcc += n;

				pp->sp_delta_overflows +=
				    b_to_q((char *)si_rxbuf, n, &tp->t_rawq);

				ttwakeup(tp);
				if (tp->t_state & TS_TTSTOP &&
				    (tp->t_iflag & IXANY ||
				     tp->t_cc[VSTART] == tp->t_cc[VSTOP])) {
					tp->t_state &= ~TS_TTSTOP;
					tp->t_lflag &= ~FLUSHO;
					si_start(tp);
				}
			} else {
				/*
				 * It'd be nice to not have to go through the
				 * function call overhead for each char here.
				 * It'd be nice to block input it, saving a
				 * loop here and the call/return overhead.
				 */
				for(x = 0; x < n; x++) {
					i = si_rxbuf[x];
					if (ttyld_rint(tp, i)
					     == -1) {
						pp->sp_delta_overflows++;
					}
				}
			}
			goto more_rx;	/* try for more until RXbuf is empty */

	end_rx:		/* XXX: Again, sorry about the gotos.. :-) */

			/*
			 * Do TX stuff
			 */
			ttyld_start(tp);

		} /* end of for (all ports on this controller) */
	} /* end of for (all controllers) */

	in_intr = 0;
	DPRINT((0, arg == NULL ? DBG_POLL:DBG_INTR, "end si_intr\n"));
}