/* $OpenBSD: cy.c,v 1.41 2021/09/01 16:10:39 jan Exp $ */ /* * Copyright (c) 1996 Timo Rossi. * All rights reserved. * * 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. * 3. Neither the name of the author nor the names of contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ /* * cy.c * * Driver for Cyclades Cyclom-8/16/32 multiport serial cards * (currently not tested with Cyclom-32 cards) * * Timo Rossi, 1996 * * Supports both ISA and PCI Cyclom cards * * Uses CD1400 automatic CTS flow control, and * if CY_HW_RTS is defined, uses CD1400 automatic input flow control. * This requires a special cable that exchanges the RTS and DTR lines. * * Lots of debug output can be enabled by defining CY_DEBUG * Some debugging counters (number of receive/transmit interrupts etc.) * can be enabled by defining CY_DEBUG1 * * This version uses the bus_space/io_??() stuff * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include int cy_intr(void *); int cyparam(struct tty *, struct termios *); void cystart(struct tty *); void cy_poll(void *); int cy_modem_control(struct cy_port *, int, int); void cy_enable_transmitter(struct cy_port *); void cd1400_channel_cmd(struct cy_port *, int); int cy_speed(speed_t, int *, int *, int); struct cfdriver cy_cd = { NULL, "cy", DV_TTY }; /* * Common probe routine * * returns the number of chips found. */ int cy_probe_common(bus_space_tag_t memt, bus_space_handle_t memh, int bustype) { int cy_chip, chip_offs; u_char firmware_ver; int nchips; /* Cyclom card hardware reset */ bus_space_write_1(memt, memh, CY16_RESET<sc_dev.dv_unit; num_chips = sc->sc_nr_cd1400s; if (num_chips == 0) return; timeout_set(&sc->sc_poll_to, cy_poll, sc); bzero(sc->sc_ports, sizeof(sc->sc_ports)); sc->sc_nports = num_chips * CD1400_NO_OF_CHANNELS; port = 0; for (cy_chip = 0, chip_offs = 0; cy_chip < num_chips; cy_chip++, chip_offs += (CY_CD1400_MEMSPACING<sc_bustype)) { if (cy_chip == 4) chip_offs -= (CY32_ADDR_FIX<sc_bustype); #ifdef CY_DEBUG printf("attach CD1400 #%d offset 0x%x\n", cy_chip, chip_offs); #endif sc->sc_cd1400_offs[cy_chip] = chip_offs; /* configure port 0 as serial port (should already be after reset) */ cd_write_reg_sc(sc, cy_chip, CD1400_GCR, 0); /* Set cy_clock depending on firmware version */ if (cd_read_reg_sc(sc, cy_chip, CD1400_GFRCR) <= 0x46) cy_clock = CY_CLOCK; else cy_clock = CY_CLOCK_60; /* set up a receive timeout period (1ms) */ cd_write_reg_sc(sc, cy_chip, CD1400_PPR, (cy_clock / CD1400_PPR_PRESCALER / 1000) + 1); for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; cdu++) { sc->sc_ports[port].cy_port_num = port; sc->sc_ports[port].cy_memt = sc->sc_memt; sc->sc_ports[port].cy_memh = sc->sc_memh; sc->sc_ports[port].cy_chip_offs = chip_offs; sc->sc_ports[port].cy_bustype = sc->sc_bustype; sc->sc_ports[port].cy_clock = cy_clock; /* should we initialize anything else here? */ port++; } /* for(each port on one CD1400...) */ } /* for(each CD1400 on a card... ) */ printf(": %d ports\n", port); /* ensure an edge for the next interrupt */ bus_space_write_1(sc->sc_memt, sc->sc_memh, CY_CLEAR_INTR<sc_bustype, 0); } /* * open routine. returns zero if successful, else error code */ int cyopen(dev_t, int, int, struct proc *); int cyclose(dev_t, int, int, struct proc *); int cyread(dev_t, struct uio *, int); int cywrite(dev_t, struct uio *, int); struct tty *cytty(dev_t); int cyioctl(dev_t, u_long, caddr_t, int, struct proc *); int cystop(struct tty *, int flag); int cyopen(dev_t dev, int flag, int mode, struct proc *p) { int card = CY_CARD(dev); int port = CY_PORT(dev); struct cy_softc *sc; struct cy_port *cy; struct tty *tp; int s, error; if (card >= cy_cd.cd_ndevs || (sc = cy_cd.cd_devs[card]) == NULL) { return (ENXIO); } #ifdef CY_DEBUG printf("%s open port %d flag 0x%x mode 0x%x\n", sc->sc_dev.dv_xname, port, flag, mode); #endif cy = &sc->sc_ports[port]; s = spltty(); if (cy->cy_tty == NULL) { cy->cy_tty = ttymalloc(0); } splx(s); tp = cy->cy_tty; tp->t_oproc = cystart; tp->t_param = cyparam; tp->t_dev = dev; if (!ISSET(tp->t_state, TS_ISOPEN)) { SET(tp->t_state, TS_WOPEN); ttychars(tp); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_cflag = TTYDEF_CFLAG; if (ISSET(cy->cy_openflags, TIOCFLAG_CLOCAL)) SET(tp->t_cflag, CLOCAL); if (ISSET(cy->cy_openflags, TIOCFLAG_CRTSCTS)) SET(tp->t_cflag, CRTSCTS); if (ISSET(cy->cy_openflags, TIOCFLAG_MDMBUF)) SET(tp->t_cflag, MDMBUF); tp->t_lflag = TTYDEF_LFLAG; tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; s = spltty(); /* * Allocate input ring buffer if we don't already have one */ if (cy->cy_ibuf == NULL) { cy->cy_ibuf = malloc(IBUF_SIZE, M_DEVBUF, M_NOWAIT); if (cy->cy_ibuf == NULL) { printf("%s: (port %d) can't allocate input buffer\n", sc->sc_dev.dv_xname, port); splx(s); return (ENOMEM); } cy->cy_ibuf_end = cy->cy_ibuf + IBUF_SIZE; } /* mark the ring buffer as empty */ cy->cy_ibuf_rd_ptr = cy->cy_ibuf_wr_ptr = cy->cy_ibuf; /* select CD1400 channel */ cd_write_reg(cy, CD1400_CAR, port & CD1400_CAR_CHAN); /* reset the channel */ cd1400_channel_cmd(cy, CD1400_CCR_CMDRESET); /* encode unit (port) number in LIVR */ /* there is just enough space for 5 bits (32 ports) */ cd_write_reg(cy, CD1400_LIVR, port << 3); cy->cy_channel_control = 0; if (!timeout_pending(&sc->sc_poll_to)) timeout_add(&sc->sc_poll_to, 1); /* this sets parameters and raises DTR */ cyparam(tp, &tp->t_termios); ttsetwater(tp); /* raise RTS too */ cy_modem_control(cy, TIOCM_RTS, DMBIS); cy->cy_carrier_stat = cd_read_reg(cy, CD1400_MSVR2); /* enable receiver and modem change interrupts */ cd_write_reg(cy, CD1400_SRER, CD1400_SRER_MDMCH | CD1400_SRER_RXDATA); if (CY_DIALOUT(dev) || ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR) || ISSET(tp->t_cflag, MDMBUF) || ISSET(cy->cy_carrier_stat, CD1400_MSVR2_CD)) SET(tp->t_state, TS_CARR_ON); else CLR(tp->t_state, TS_CARR_ON); } else if (ISSET(tp->t_state, TS_XCLUDE) && suser(p) != 0) { return (EBUSY); } else { s = spltty(); } /* wait for carrier if necessary */ if (!ISSET(flag, O_NONBLOCK)) { while (!ISSET(tp->t_cflag, CLOCAL) && !ISSET(tp->t_state, TS_CARR_ON)) { SET(tp->t_state, TS_WOPEN); error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, ttopen); if (error != 0) { splx(s); CLR(tp->t_state, TS_WOPEN); return (error); } } } splx(s); return (*linesw[tp->t_line].l_open)(dev, tp, p); } /* * close routine. returns zero if successful, else error code */ int cyclose(dev_t dev, int flag, int mode, struct proc *p) { int card = CY_CARD(dev); int port = CY_PORT(dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; struct tty *tp = cy->cy_tty; int s; #ifdef CY_DEBUG printf("%s close port %d, flag 0x%x, mode 0x%x\n", sc->sc_dev.dv_xname, port, flag, mode); #endif (*linesw[tp->t_line].l_close)(tp, flag, p); s = spltty(); if (ISSET(tp->t_cflag, HUPCL) && !ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR)) { /* drop DTR and RTS (should we wait for output buffer to become empty first?) */ cy_modem_control(cy, 0, DMSET); } /* * XXX should we disable modem change and * receive interrupts here or somewhere ? */ CLR(tp->t_state, TS_BUSY | TS_FLUSH); splx(s); ttyclose(tp); return (0); } /* * Read routine */ int cyread(dev_t dev, struct uio *uio, int flag) { int card = CY_CARD(dev); int port = CY_PORT(dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; struct tty *tp = cy->cy_tty; #ifdef CY_DEBUG printf("%s read port %d uio %p flag 0x%x\n", sc->sc_dev.dv_xname, port, uio, flag); #endif return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); } /* * Write routine */ int cywrite(dev_t dev, struct uio *uio, int flag) { int card = CY_CARD(dev); int port = CY_PORT(dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; struct tty *tp = cy->cy_tty; #ifdef CY_DEBUG printf("%s write port %d uio %p flag 0x%x\n", sc->sc_dev.dv_xname, port, uio, flag); #endif return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } /* * return tty pointer */ struct tty * cytty(dev_t dev) { int card = CY_CARD(dev); int port = CY_PORT(dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; struct tty *tp = cy->cy_tty; return (tp); } /* * ioctl routine */ int cyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { int card = CY_CARD(dev); int port = CY_PORT(dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; struct tty *tp = cy->cy_tty; int error; #ifdef CY_DEBUG printf("%s port %d ioctl cmd 0x%lx data %p flag 0x%x\n", sc->sc_dev.dv_xname, port, cmd, data, flag); #endif error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); if (error >= 0) return (error); error = ttioctl(tp, cmd, data, flag, p); if (error >= 0) return (error); /* XXX should not allow dropping DTR when dialin? */ switch (cmd) { case TIOCSBRK: /* start break */ SET(cy->cy_flags, CYF_START_BREAK); cy_enable_transmitter(cy); break; case TIOCCBRK: /* stop break */ SET(cy->cy_flags, CYF_END_BREAK); cy_enable_transmitter(cy); break; case TIOCSDTR: /* DTR on */ cy_modem_control(cy, TIOCM_DTR, DMBIS); break; case TIOCCDTR: /* DTR off */ cy_modem_control(cy, TIOCM_DTR, DMBIC); break; case TIOCMSET: /* set new modem control line values */ cy_modem_control(cy, *((int *)data), DMSET); break; case TIOCMBIS: /* turn modem control bits on */ cy_modem_control(cy, *((int *)data), DMBIS); break; case TIOCMBIC: /* turn modem control bits off */ cy_modem_control(cy, *((int *)data), DMBIC); break; case TIOCMGET: /* get modem control/status line state */ *((int *)data) = cy_modem_control(cy, 0, DMGET); break; case TIOCGFLAGS: *((int *)data) = cy->cy_openflags | (CY_DIALOUT(dev) ? TIOCFLAG_SOFTCAR : 0); break; case TIOCSFLAGS: error = suser(p); if (error != 0) return (EPERM); cy->cy_openflags = *((int *)data) & (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS | TIOCFLAG_MDMBUF); break; default: return (ENOTTY); } return (0); } /* * start output */ void cystart(struct tty *tp) { int card = CY_CARD(tp->t_dev); int port = CY_PORT(tp->t_dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; int s; #ifdef CY_DEBUG printf("%s port %d start, tty %p\n", sc->sc_dev.dv_xname, port, tp); #endif s = spltty(); #ifdef CY_DEBUG1 cy->cy_start_count++; #endif if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) { ttwakeupwr(tp); if (tp->t_outq.c_cc == 0) goto out; SET(tp->t_state, TS_BUSY); cy_enable_transmitter(cy); } out: splx(s); } /* * stop output */ int cystop(struct tty *tp, int flag) { int card = CY_CARD(tp->t_dev); int port = CY_PORT(tp->t_dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; int s; #ifdef CY_DEBUG printf("%s port %d stop tty %p flag 0x%x\n", sc->sc_dev.dv_xname, port, tp, flag); #endif s = spltty(); if (ISSET(tp->t_state, TS_BUSY)) { if (!ISSET(tp->t_state, TS_TTSTOP)) SET(tp->t_state, TS_FLUSH); /* * the transmit interrupt routine will disable transmit when it * notices that CYF_STOP has been set. */ SET(cy->cy_flags, CYF_STOP); } splx(s); return (0); } /* * parameter setting routine. * returns 0 if successful, else returns error code */ int cyparam(struct tty *tp, struct termios *t) { int card = CY_CARD(tp->t_dev); int port = CY_PORT(tp->t_dev); struct cy_softc *sc = cy_cd.cd_devs[card]; struct cy_port *cy = &sc->sc_ports[port]; int ibpr, obpr, i_clk_opt, o_clk_opt; int s, opt; #ifdef CY_DEBUG printf("%s port %d param tty %p termios %p\n", sc->sc_dev.dv_xname, port, tp, t); printf("ispeed %d ospeed %d\n", t->c_ispeed, t->c_ospeed); #endif if (t->c_ospeed != 0 && cy_speed(t->c_ospeed, &o_clk_opt, &obpr, cy->cy_clock) < 0) return (EINVAL); if (t->c_ispeed != 0 && cy_speed(t->c_ispeed, &i_clk_opt, &ibpr, cy->cy_clock) < 0) return (EINVAL); s = spltty(); /* hang up the line is ospeed is zero, else turn DTR on */ cy_modem_control(cy, TIOCM_DTR, (t->c_ospeed == 0 ? DMBIC : DMBIS)); /* channel was selected by the above call to cy_modem_control() */ /* cd_write_reg(cy, CD1400_CAR, port & CD1400_CAR_CHAN); */ /* set transmit speed */ if (t->c_ospeed != 0) { cd_write_reg(cy, CD1400_TCOR, o_clk_opt); cd_write_reg(cy, CD1400_TBPR, obpr); } /* set receive speed */ if (t->c_ispeed != 0) { cd_write_reg(cy, CD1400_RCOR, i_clk_opt); cd_write_reg(cy, CD1400_RBPR, ibpr); } opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN | (ISSET(t->c_cflag, CREAD) ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS); if (opt != cy->cy_channel_control) { cy->cy_channel_control = opt; cd1400_channel_cmd(cy, opt); } /* compute COR1 contents */ opt = 0; if (ISSET(t->c_cflag, PARENB)) { if (ISSET(t->c_cflag, PARODD)) opt |= CD1400_COR1_PARODD; opt |= CD1400_COR1_PARNORMAL; } if (!ISSET(t->c_iflag, INPCK)) opt |= CD1400_COR1_NOINPCK; /* no parity checking */ if (ISSET(t->c_cflag, CSTOPB)) opt |= CD1400_COR1_STOP2; switch (t->c_cflag & CSIZE) { case CS5: opt |= CD1400_COR1_CS5; break; case CS6: opt |= CD1400_COR1_CS6; break; case CS7: opt |= CD1400_COR1_CS7; break; default: opt |= CD1400_COR1_CS8; break; } cd_write_reg(cy, CD1400_COR1, opt); #ifdef CY_DEBUG printf("cor1 = 0x%x...", opt); #endif /* * use the CD1400 automatic CTS flow control if CRTSCTS is set * * CD1400_COR2_ETC is used because breaks are generated with * embedded transmit commands */ cd_write_reg(cy, CD1400_COR2, CD1400_COR2_ETC | (ISSET(t->c_cflag, CRTSCTS) ? CD1400_COR2_CCTS_OFLOW : 0)); cd_write_reg(cy, CD1400_COR3, RX_FIFO_THRESHOLD); cd1400_channel_cmd(cy, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR1 | CD1400_CCR_COR2 | CD1400_CCR_COR3); cd_write_reg(cy, CD1400_COR4, CD1400_COR4_PFO_EXCEPTION); cd_write_reg(cy, CD1400_COR5, 0); /* * set modem change option registers to generate interrupts * on carrier detect changes. * * if hardware RTS handshaking is used (CY_HW_RTS, DTR and RTS lines * exchanged), also set the handshaking threshold. */ #ifdef CY_HW_RTS cd_write_reg(cy, CD1400_MCOR1, CD1400_MCOR1_CDzd | (ISSET(t->c_cflag, CRTSCTS) ? RX_DTR_THRESHOLD : 0)); #else cd_write_reg(cy, CD1400_MCOR1, CD1400_MCOR1_CDzd); #endif /* CY_HW_RTS */ cd_write_reg(cy, CD1400_MCOR2, CD1400_MCOR2_CDod); /* * set receive timeout to approx. 2ms * could use more complex logic here... * (but is it actually needed or even useful?) */ cd_write_reg(cy, CD1400_RTPR, 2); /* * should do anything else here? * XXX check MDMBUF handshaking like in com.c? */ splx(s); return (0); } /* * set/get modem line status * * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR * * RTS and DTR are exchanged if CY_HW_RTS is set * */ int cy_modem_control(struct cy_port *cy, int bits, int howto) { int s, msvr; s = spltty(); /* select channel */ cd_write_reg(cy, CD1400_CAR, cy->cy_port_num & CD1400_CAR_CHAN); /* does not manipulate RTS if it is used for flow control */ switch (howto) { case DMGET: bits = 0; if (cy->cy_channel_control & CD1400_CCR_RCVEN) bits |= TIOCM_LE; msvr = cd_read_reg(cy, CD1400_MSVR2); #ifdef CY_HW_RTS if (cd_read_reg(cy, CD1400_MSVR1) & CD1400_MSVR1_RTS) bits |= TIOCM_DTR; if (msvr & CD1400_MSVR2_DTR) bits |= TIOCM_RTS; #else if (cd_read_reg(cy, CD1400_MSVR1) & CD1400_MSVR1_RTS) bits |= TIOCM_RTS; if (msvr & CD1400_MSVR2_DTR) bits |= TIOCM_DTR; #endif /* CY_HW_RTS */ if (msvr & CD1400_MSVR2_CTS) bits |= TIOCM_CTS; if (msvr & CD1400_MSVR2_CD) bits |= TIOCM_CD; if (msvr & CD1400_MSVR2_DSR) /* not connected on some Cyclom cards? */ bits |= TIOCM_DSR; if (msvr & CD1400_MSVR2_RI) /* not connected on Cyclom-8Y cards? */ bits |= TIOCM_RI; splx(s); return (bits); case DMSET: /* replace old values with new ones */ #ifdef CY_HW_RTS if (!ISSET(cy->cy_tty->t_cflag, CRTSCTS)) cd_write_reg(cy, CD1400_MSVR2, ((bits & TIOCM_RTS) ? CD1400_MSVR2_DTR : 0)); cd_write_reg(cy, CD1400_MSVR1, ((bits & TIOCM_DTR) ? CD1400_MSVR1_RTS : 0)); #else if (!ISSET(cy->cy_tty->t_cflag, CRTSCTS)) cd_write_reg(cy, CD1400_MSVR1, ((bits & TIOCM_RTS) ? CD1400_MSVR1_RTS : 0)); cd_write_reg(cy, CD1400_MSVR2, ((bits & TIOCM_DTR) ? CD1400_MSVR2_DTR : 0)); #endif /* CY_HW_RTS */ break; case DMBIS: /* set bits */ #ifdef CY_HW_RTS if (!ISSET(cy->cy_tty->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0) cd_write_reg(cy, CD1400_MSVR2, CD1400_MSVR2_DTR); if (bits & TIOCM_DTR) cd_write_reg(cy, CD1400_MSVR1, CD1400_MSVR1_RTS); #else if (!ISSET(cy->cy_tty->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0) cd_write_reg(cy, CD1400_MSVR1, CD1400_MSVR1_RTS); if (bits & TIOCM_DTR) cd_write_reg(cy, CD1400_MSVR2, CD1400_MSVR2_DTR); #endif /* CY_HW_RTS */ break; case DMBIC: /* clear bits */ #ifdef CY_HW_RTS if (!ISSET(cy->cy_tty->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) cd_write_reg(cy, CD1400_MSVR2, 0); if (bits & TIOCM_DTR) cd_write_reg(cy, CD1400_MSVR1, 0); #else if (!ISSET(cy->cy_tty->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) cd_write_reg(cy, CD1400_MSVR1, 0); if (bits & TIOCM_DTR) cd_write_reg(cy, CD1400_MSVR2, 0); #endif /* CY_HW_RTS */ break; } splx(s); return (0); } /* * Upper-level handler loop (called from timer interrupt?) * This routine is common for multiple cards */ void cy_poll(void *arg) { int port; struct cy_softc *sc = arg; struct cy_port *cy; struct tty *tp; static int counter = 0; #ifdef CY_DEBUG1 int did_something; #endif int s; s = spltty(); if (sc->sc_events == 0 && ++counter < 200) { splx(s); goto out; } sc->sc_events = 0; splx(s); #ifdef CY_DEBUG1 sc->sc_poll_count1++; did_something = 0; #endif for (port = 0; port < sc->sc_nports; port++) { cy = &sc->sc_ports[port]; if ((tp = cy->cy_tty) == NULL || cy->cy_ibuf == NULL || !ISSET(tp->t_state, TS_ISOPEN | TS_WOPEN)) continue; /* * handle received data */ while (cy->cy_ibuf_rd_ptr != cy->cy_ibuf_wr_ptr) { u_char line_stat; int chr; line_stat = cy->cy_ibuf_rd_ptr[0]; chr = cy->cy_ibuf_rd_ptr[1]; if (line_stat & (CD1400_RDSR_BREAK|CD1400_RDSR_FE)) chr |= TTY_FE; if (line_stat & CD1400_RDSR_PE) chr |= TTY_PE; /* * on an overrun error the data is treated as * good just as it should be. */ #ifdef CY_DEBUG printf("%s port %d ttyinput 0x%x\n", sc->sc_dev.dv_xname, port, chr); #endif (*linesw[tp->t_line].l_rint)(chr, tp); s = spltty(); /* really necessary? */ if ((cy->cy_ibuf_rd_ptr += 2) == cy->cy_ibuf_end) cy->cy_ibuf_rd_ptr = cy->cy_ibuf; splx(s); #ifdef CY_DEBUG1 did_something = 1; #endif } #ifndef CY_HW_RTS /* * If we don't have any received data in ibuf and * CRTSCTS is on and RTS is turned off, it is time * to turn RTS back on */ if (ISSET(tp->t_cflag, CRTSCTS)) { /* we can't use cy_modem_control() here as it doesn't change RTS if RTSCTS is on */ cd_write_reg(cy, CD1400_CAR, port & CD1400_CAR_CHAN); if ((cd_read_reg(cy, CD1400_MSVR1) & CD1400_MSVR1_RTS) == 0) { cd_write_reg(cy, CD1400_MSVR1, CD1400_MSVR1_RTS); #ifdef CY_DEBUG1 did_something = 1; #endif } } #endif /* CY_HW_RTS */ /* * handle carrier changes */ s = spltty(); if (ISSET(cy->cy_flags, CYF_CARRIER_CHANGED)) { int carrier; CLR(cy->cy_flags, CYF_CARRIER_CHANGED); splx(s); carrier = ((cy->cy_carrier_stat & CD1400_MSVR2_CD) != 0); #ifdef CY_DEBUG printf("%s: cy_poll: carrier change " "(port %d, carrier %d)\n", sc->sc_dev.dv_xname, port, carrier); #endif if (CY_DIALIN(tp->t_dev) && !(*linesw[tp->t_line].l_modem)(tp, carrier)) cy_modem_control(cy, TIOCM_DTR, DMBIC); #ifdef CY_DEBUG1 did_something = 1; #endif } else { splx(s); } s = spltty(); if (ISSET(cy->cy_flags, CYF_START)) { CLR(cy->cy_flags, CYF_START); splx(s); (*linesw[tp->t_line].l_start)(tp); #ifdef CY_DEBUG1 did_something = 1; #endif } else { splx(s); } /* could move this to even upper level... */ if (cy->cy_fifo_overruns) { cy->cy_fifo_overruns = 0; /* doesn't report overrun count, but shouldn't really matter */ log(LOG_WARNING, "%s: port %d fifo overrun\n", sc->sc_dev.dv_xname, port); } if (cy->cy_ibuf_overruns) { cy->cy_ibuf_overruns = 0; log(LOG_WARNING, "%s: port %d ibuf overrun\n", sc->sc_dev.dv_xname, port); } } /* for(port...) */ #ifdef CY_DEBUG1 if (did_something && counter >= 200) sc->sc_poll_count2++; #endif counter = 0; out: timeout_add(&sc->sc_poll_to, 1); } /* * hardware interrupt routine */ int cy_intr(void *arg) { struct cy_softc *sc = arg; struct cy_port *cy; int cy_chip, stat; int int_serviced = -1; /* * Check interrupt status of each CD1400 chip on this card * (multiple cards cannot share the same interrupt) */ for (cy_chip = 0; cy_chip < sc->sc_nr_cd1400s; cy_chip++) { stat = cd_read_reg_sc(sc, cy_chip, CD1400_SVRR); if (stat == 0) continue; if (ISSET(stat, CD1400_SVRR_RXRDY)) { u_char save_car, save_rir, serv_type; u_char line_stat, recv_data, n_chars; u_char *buf_p; save_rir = cd_read_reg_sc(sc, cy_chip, CD1400_RIR); save_car = cd_read_reg_sc(sc, cy_chip, CD1400_CAR); /* enter rx service */ cd_write_reg_sc(sc, cy_chip, CD1400_CAR, save_rir); serv_type = cd_read_reg_sc(sc, cy_chip, CD1400_RIVR); cy = &sc->sc_ports[serv_type >> 3]; #ifdef CY_DEBUG1 cy->cy_rx_int_count++; #endif buf_p = cy->cy_ibuf_wr_ptr; if (ISSET(serv_type, CD1400_RIVR_EXCEPTION)) { line_stat = cd_read_reg(cy, CD1400_RDSR); recv_data = cd_read_reg(cy, CD1400_RDSR); if (cy->cy_tty == NULL || !ISSET(cy->cy_tty->t_state, TS_ISOPEN)) goto end_rx_serv; #ifdef CY_DEBUG printf("%s port %d recv exception, " "line_stat 0x%x, char 0x%x\n", sc->sc_dev.dv_xname, cy->cy_port_num, line_stat, recv_data); #endif if (ISSET(line_stat, CD1400_RDSR_OE)) cy->cy_fifo_overruns++; *buf_p++ = line_stat; *buf_p++ = recv_data; if (buf_p == cy->cy_ibuf_end) buf_p = cy->cy_ibuf; if (buf_p == cy->cy_ibuf_rd_ptr) { if (buf_p == cy->cy_ibuf) buf_p = cy->cy_ibuf_end; buf_p -= 2; cy->cy_ibuf_overruns++; } sc->sc_events = 1; } else { /* no exception, received data OK */ n_chars = cd_read_reg(cy, CD1400_RDCR); /* If no tty or not open, discard data */ if (cy->cy_tty == NULL || !ISSET(cy->cy_tty->t_state, TS_ISOPEN)) { while (n_chars--) cd_read_reg(cy, CD1400_RDSR); goto end_rx_serv; } #ifdef CY_DEBUG printf("%s port %d receive ok %d chars\n", sc->sc_dev.dv_xname, cy->cy_port_num, n_chars); #endif while (n_chars--) { *buf_p++ = 0; /* status: OK */ *buf_p++ = cd_read_reg(cy, CD1400_RDSR); /* data byte */ if (buf_p == cy->cy_ibuf_end) buf_p = cy->cy_ibuf; if (buf_p == cy->cy_ibuf_rd_ptr) { if (buf_p == cy->cy_ibuf) buf_p = cy->cy_ibuf_end; buf_p -= 2; cy->cy_ibuf_overruns++; break; } } sc->sc_events = 1; } cy->cy_ibuf_wr_ptr = buf_p; #ifndef CY_HW_RTS /* RTS handshaking for incoming data */ if (ISSET(cy->cy_tty->t_cflag, CRTSCTS)) { int bf; bf = buf_p - cy->cy_ibuf_rd_ptr; if (bf < 0) bf += IBUF_SIZE; if (bf > (IBUF_SIZE/2)) /* turn RTS off */ cd_write_reg(cy, CD1400_MSVR1, 0); } #endif /* CY_HW_RTS */ end_rx_serv: /* terminate service context */ cd_write_reg(cy, CD1400_RIR, save_rir & 0x3f); cd_write_reg(cy, CD1400_CAR, save_car); int_serviced = 1; } /* if(rx_service...) */ if (ISSET(stat, CD1400_SVRR_MDMCH)) { u_char save_car, save_mir, serv_type, modem_stat; save_mir = cd_read_reg_sc(sc, cy_chip, CD1400_MIR); save_car = cd_read_reg_sc(sc, cy_chip, CD1400_CAR); /* enter modem service */ cd_write_reg_sc(sc, cy_chip, CD1400_CAR, save_mir); serv_type = cd_read_reg_sc(sc, cy_chip, CD1400_MIVR); cy = &sc->sc_ports[serv_type >> 3]; #ifdef CY_DEBUG1 cy->cy_modem_int_count++; #endif modem_stat = cd_read_reg(cy, CD1400_MSVR2); #ifdef CY_DEBUG printf("%s port %d modem line change, new stat 0x%x\n", sc->sc_dev.dv_xname, cy->cy_port_num, modem_stat); #endif if (ISSET((cy->cy_carrier_stat ^ modem_stat), CD1400_MSVR2_CD)) { SET(cy->cy_flags, CYF_CARRIER_CHANGED); sc->sc_events = 1; } cy->cy_carrier_stat = modem_stat; /* terminate service context */ cd_write_reg(cy, CD1400_MIR, save_mir & 0x3f); cd_write_reg(cy, CD1400_CAR, save_car); int_serviced = 1; } /* if(modem_service...) */ if (ISSET(stat, CD1400_SVRR_TXRDY)) { u_char save_car, save_tir, serv_type, count, ch; struct tty *tp; save_tir = cd_read_reg_sc(sc, cy_chip, CD1400_TIR); save_car = cd_read_reg_sc(sc, cy_chip, CD1400_CAR); /* enter tx service */ cd_write_reg_sc(sc, cy_chip, CD1400_CAR, save_tir); serv_type = cd_read_reg_sc(sc, cy_chip, CD1400_TIVR); cy = &sc->sc_ports[serv_type >> 3]; #ifdef CY_DEBUG1 cy->cy_tx_int_count++; #endif #ifdef CY_DEBUG printf("%s port %d tx service\n", sc->sc_dev.dv_xname, cy->cy_port_num); #endif /* stop transmitting if no tty or CYF_STOP set */ tp = cy->cy_tty; if (tp == NULL || ISSET(cy->cy_flags, CYF_STOP)) goto txdone; count = 0; if (ISSET(cy->cy_flags, CYF_SEND_NUL)) { cd_write_reg(cy, CD1400_TDR, 0); cd_write_reg(cy, CD1400_TDR, 0); count += 2; CLR(cy->cy_flags, CYF_SEND_NUL); } if (tp->t_outq.c_cc > 0) { SET(tp->t_state, TS_BUSY); while (tp->t_outq.c_cc > 0 && count < CD1400_TX_FIFO_SIZE) { ch = getc(&tp->t_outq); /* remember to double NUL characters because embedded transmit commands are enabled */ if (ch == 0) { if (count >= CD1400_TX_FIFO_SIZE-2) { SET(cy->cy_flags, CYF_SEND_NUL); break; } cd_write_reg(cy, CD1400_TDR, ch); count++; } cd_write_reg(cy, CD1400_TDR, ch); count++; } } else { /* no data to send -- check if we should start/stop a break */ /* XXX does this cause too much delay before breaks? */ if (ISSET(cy->cy_flags, CYF_START_BREAK)) { cd_write_reg(cy, CD1400_TDR, 0); cd_write_reg(cy, CD1400_TDR, 0x81); CLR(cy->cy_flags, CYF_START_BREAK); } if (ISSET(cy->cy_flags, CYF_END_BREAK)) { cd_write_reg(cy, CD1400_TDR, 0); cd_write_reg(cy, CD1400_TDR, 0x83); CLR(cy->cy_flags, CYF_END_BREAK); } } if (tp->t_outq.c_cc == 0) { txdone: /* * No data to send or requested to stop. * Disable transmit interrupt */ cd_write_reg(cy, CD1400_SRER, cd_read_reg(cy, CD1400_SRER) & ~CD1400_SRER_TXRDY); CLR(cy->cy_flags, CYF_STOP); CLR(tp->t_state, TS_BUSY); } if (tp->t_outq.c_cc <= tp->t_lowat) { SET(cy->cy_flags, CYF_START); sc->sc_events = 1; } /* terminate service context */ cd_write_reg(cy, CD1400_TIR, save_tir & 0x3f); cd_write_reg(cy, CD1400_CAR, save_car); int_serviced = 1; } /* if(tx_service...) */ } /* for(...all CD1400s on a card) */ /* ensure an edge for next interrupt */ bus_space_write_1(sc->sc_memt, sc->sc_memh, CY_CLEAR_INTR<sc_bustype, 0); return (int_serviced); } /* * subroutine to enable CD1400 transmitter */ void cy_enable_transmitter(struct cy_port *cy) { int s; s = spltty(); cd_write_reg(cy, CD1400_CAR, cy->cy_port_num & CD1400_CAR_CHAN); cd_write_reg(cy, CD1400_SRER, cd_read_reg(cy, CD1400_SRER) | CD1400_SRER_TXRDY); splx(s); } /* * Execute a CD1400 channel command */ void cd1400_channel_cmd(struct cy_port *cy, int cmd) { u_int waitcnt = 5 * 8 * 1024; /* approx 5 ms */ #ifdef CY_DEBUG printf("c1400_channel_cmd cy %p command 0x%x\n", cy, cmd); #endif /* wait until cd1400 is ready to process a new command */ while (cd_read_reg(cy, CD1400_CCR) != 0 && waitcnt-- > 0) ; if (waitcnt == 0) log(LOG_ERR, "cy: channel command timeout\n"); cd_write_reg(cy, CD1400_CCR, cmd); } /* * Compute clock option register and baud rate register values * for a given speed. Return 0 on success, -1 on failure. * * The error between requested and actual speed seems * to be well within allowed limits (less than 3%) * with every speed value between 50 and 150000 bps. */ int cy_speed(speed_t speed, int *cor, int *bpr, int cy_clock) { int c, co, br; if (speed < 50 || speed > 150000) return (-1); for (c = 0, co = 8; co <= 2048; co <<= 2, c++) { br = (cy_clock + (co * speed) / 2) / (co * speed); if (br < 0x100) { *bpr = br; *cor = c; return (0); } } return (-1); }