/* $NetBSD: cy.c,v 1.60 2014/11/15 19:18:18 christos Exp $ */ /* * 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 * * 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 */ #include __KERNEL_RCSID(0, "$NetBSD: cy.c,v 1.60 2014/11/15 19:18:18 christos Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int cyparam(struct tty *, struct termios *); static void cystart(struct tty *); static void cy_poll(void *); static int cy_modem_control(struct cy_softc *, struct cy_port *, int, int); static void cy_enable_transmitter(struct cy_softc *, struct cy_port *); static void cd1400_channel_cmd(struct cy_softc *, struct cy_port *, int); static int cy_speed(speed_t, int *, int *, int); extern struct cfdriver cy_cd; static dev_type_open(cyopen); static dev_type_close(cyclose); static dev_type_read(cyread); static dev_type_write(cywrite); static dev_type_ioctl(cyioctl); static dev_type_stop(cystop); static dev_type_tty(cytty); static dev_type_poll(cypoll); const struct cdevsw cy_cdevsw = { .d_open = cyopen, .d_close = cyclose, .d_read = cyread, .d_write = cywrite, .d_ioctl = cyioctl, .d_stop = cystop, .d_tty = cytty, .d_poll = cypoll, .d_mmap = nommap, .d_kqfilter = ttykqfilter, .d_discard = nodiscard, .d_flag = D_TTY }; static int cy_open = 0; static int cy_events = 0; int cy_attached_ttys; bool cy_callout_init; callout_t cy_poll_callout; /* * Common probe routine */ int cy_find(struct cy_softc *sc) { int cy_chip, chip; u_char firmware_ver; bus_space_tag_t tag = sc->sc_memt; bus_space_handle_t bsh = sc->sc_bsh; int bustype = sc->sc_bustype; /* Cyclom card hardware reset */ bus_space_write_1(tag, bsh, CY16_RESET << bustype, 0); DELAY(500); /* wait for reset to complete */ bus_space_write_1(tag, bsh, CY_CLEAR_INTR << bustype, 0); #ifdef CY_DEBUG printf("cy: card reset done\n"); #endif sc->sc_nchips = 0; for (cy_chip = 0, chip = 0; cy_chip < CY_MAX_CD1400s; cy_chip++, chip += (CY_CD1400_MEMSPACING << bustype)) { int i; /* * the last 4 nchips are 'interleaved' with the first 4 on * 32-port boards */ if (cy_chip == 4) chip -= (CY32_ADDR_FIX << bustype); #ifdef CY_DEBUG printf("sy: probe chip %d offset 0x%x ... ", cy_chip, chip); #endif /* wait until the chip is ready for command */ DELAY(1000); if (bus_space_read_1(tag, bsh, chip + ((CD1400_CCR << 1) << bustype)) != 0) { #ifdef CY_DEBUG printf("not ready for command\n"); #endif break; } /* clear the firmware version reg. */ bus_space_write_1(tag, bsh, chip + ((CD1400_GFRCR << 1) << bustype), 0); /* * On Cyclom-16 references to non-existent chip 4 * actually access chip 0 (address line 9 not decoded). * Here we check if the clearing of chip 4 GFRCR actually * cleared chip 0 GFRCR. In that case we have a 16 port card. */ if (cy_chip == 4 && bus_space_read_1(tag, bsh, /* off for chip 0 (0) + */ ((CD1400_GFRCR << 1) << bustype)) == 0) break; /* reset the chip */ bus_space_write_1(tag, bsh, chip + ((CD1400_CCR << 1) << bustype), CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET); /* wait for the chip to initialize itself */ for (i = 0; i < 200; i++) { DELAY(50); firmware_ver = bus_space_read_1(tag, bsh, chip + ((CD1400_GFRCR << 1) << bustype)); if ((firmware_ver & 0xf0) == 0x40) /* found a CD1400 */ break; } #ifdef CY_DEBUG printf("firmware version 0x%x\n", firmware_ver); #endif if ((firmware_ver & 0xf0) != 0x40) break; /* firmware version OK, CD1400 found */ sc->sc_nchips++; } if (sc->sc_nchips == 0) { #ifdef CY_DEBUG printf("no CD1400s found\n"); #endif return 0; } #ifdef CY_DEBUG printf("found %d CD1400s\n", sc->sc_nchips); #endif return 1; } void cy_attach(struct cy_softc *sc) { int port, cy_chip, num_chips, cdu, chip; int cy_clock; if (!cy_callout_init) { cy_callout_init = true; callout_init(&cy_poll_callout, 0); } num_chips = sc->sc_nchips; if (num_chips == 0) return; memset(sc->sc_ports, 0, sizeof(sc->sc_ports)); port = 0; for (cy_chip = 0, chip = 0; cy_chip < num_chips; cy_chip++, chip += (CY_CD1400_MEMSPACING << sc->sc_bustype)) { if (cy_chip == 4) chip -= (CY32_ADDR_FIX << sc->sc_bustype); #ifdef CY_DEBUG aprint_debug("attach CD1400 #%d offset 0x%x\n", cy_chip, chip); #endif sc->sc_cd1400_offs[cy_chip] = chip; /* * configure port 0 as serial port (should already be after * reset) */ cd_write_reg(sc, cy_chip, CD1400_GCR, 0); if (cd_read_reg(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, 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_softc = sc; sc->sc_ports[port].cy_port_num = port; sc->sc_ports[port].cy_chip = cy_chip; 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... ) */ sc->sc_nchannels = port; aprint_normal_dev(sc->sc_dev, "%d channels (ttyCY%03d..ttyCY%03d)\n", sc->sc_nchannels, cy_attached_ttys, cy_attached_ttys + (sc->sc_nchannels - 1)); cy_attached_ttys += sc->sc_nchannels; /* ensure an edge for the next interrupt */ bus_space_write_1(sc->sc_memt, sc->sc_bsh, CY_CLEAR_INTR << sc->sc_bustype, 0); } #define CY_UNIT(dev) TTUNIT(dev) #define CY_DIALOUT(dev) TTDIALOUT(dev) #define CY_PORT(dev) cy_getport((dev)) #define CY_BOARD(cy) ((cy)->cy_softc) static struct cy_port * cy_getport(dev_t dev) { int i, j, k, u = CY_UNIT(dev); struct cy_softc *sc; for (i = 0, j = 0; i < cy_cd.cd_ndevs; i++) { k = j; sc = device_lookup_private(&cy_cd, i); if (sc == NULL) continue; if (sc->sc_nchannels == 0) continue; j += sc->sc_nchannels; if (j > u) return (&sc->sc_ports[u - k]); } return (NULL); } /* * open routine. returns zero if successful, else error code */ int cyopen(dev_t dev, int flag, int mode, struct lwp *l) { struct cy_softc *sc; struct cy_port *cy; struct tty *tp; int s, error; cy = CY_PORT(dev); if (cy == NULL) return (ENXIO); sc = CY_BOARD(cy); s = spltty(); if (cy->cy_tty == NULL) { if ((cy->cy_tty = tty_alloc()) == NULL) { splx(s); aprint_error_dev(sc->sc_dev, "port %d: can't allocate tty\n", cy->cy_port_num); return (ENOMEM); } tty_attach(cy->cy_tty); } splx(s); tp = cy->cy_tty; tp->t_oproc = cystart; tp->t_param = cyparam; tp->t_dev = dev; if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) return (EBUSY); if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 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(CY_IBUF_SIZE, M_DEVBUF, M_NOWAIT); if (cy->cy_ibuf == NULL) { aprint_error_dev(sc->sc_dev, "port %d: can't allocate input buffer\n", cy->cy_port_num); splx(s); return ENOMEM; } cy->cy_ibuf_end = cy->cy_ibuf + CY_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(sc, cy->cy_chip, CD1400_CAR, cy->cy_port_num & CD1400_CAR_CHAN); /* reset the channel */ cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDRESET); /* encode unit (port) number in LIVR */ /* there is just enough space for 5 bits (32 ports) */ cd_write_reg(sc, cy->cy_chip, CD1400_LIVR, cy->cy_port_num << 3); cy->cy_channel_control = 0; /* hmm... need spltty() here? */ if (cy_open == 0) { cy_open = 1; callout_reset(&cy_poll_callout, 1, cy_poll, NULL); } /* this sets parameters and raises DTR */ cyparam(tp, &tp->t_termios); ttsetwater(tp); /* raise RTS too */ cy_modem_control(sc, cy, TIOCM_RTS, DMBIS); cy->cy_carrier_stat = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); /* enable receiver and modem change interrupts */ cd_write_reg(sc, cy->cy_chip, 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); splx(s); } /* wait for carrier if necessary */ if (!ISSET(flag, O_NONBLOCK)) { mutex_spin_enter(&tty_lock); while (!ISSET(tp->t_cflag, CLOCAL) && !ISSET(tp->t_state, TS_CARR_ON)) { tp->t_wopen++; error = ttysleep(tp, &tp->t_rawcv, true, 0); tp->t_wopen--; if (error != 0) { mutex_spin_exit(&tty_lock); return error; } } mutex_spin_exit(&tty_lock); } return (*tp->t_linesw->l_open) (dev, tp); } /* * close routine. returns zero if successful, else error code */ int cyclose(dev_t dev, int flag, int mode, struct lwp *l) { struct cy_softc *sc; struct cy_port *cy; struct tty *tp; int s; cy = CY_PORT(dev); sc = CY_BOARD(cy); tp = cy->cy_tty; (*tp->t_linesw->l_close) (tp, flag); 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(sc, 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) { struct cy_port *cy; struct tty *tp; cy = CY_PORT(dev); tp = cy->cy_tty; return ((*tp->t_linesw->l_read)(tp, uio, flag)); } /* * Write routine */ int cywrite(dev_t dev, struct uio *uio, int flag) { struct cy_port *cy; struct tty *tp; cy = CY_PORT(dev); tp = cy->cy_tty; return ((*tp->t_linesw->l_write)(tp, uio, flag)); } /* * Poll routine */ int cypoll(dev_t dev, int events, struct lwp *l) { struct cy_port *cy; struct tty *tp; cy = CY_PORT(dev); tp = cy->cy_tty; return ((*tp->t_linesw->l_poll)(tp, events, l)); } /* * return tty pointer */ struct tty * cytty(dev_t dev) { struct cy_port *cy; cy = CY_PORT(dev); return (cy->cy_tty); } /* * ioctl routine */ int cyioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { struct cy_softc *sc; struct cy_port *cy; struct tty *tp; int error; cy = CY_PORT(dev); sc = CY_BOARD(cy); tp = cy->cy_tty; error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); if (error != EPASSTHROUGH) return error; error = ttioctl(tp, cmd, data, flag, l); if (error != EPASSTHROUGH) return error; /* XXX should not allow dropping DTR when dialin? */ switch (cmd) { case TIOCSBRK: /* start break */ SET(cy->cy_flags, CY_F_START_BREAK); cy_enable_transmitter(sc, cy); break; case TIOCCBRK: /* stop break */ SET(cy->cy_flags, CY_F_END_BREAK); cy_enable_transmitter(sc, cy); break; case TIOCSDTR: /* DTR on */ cy_modem_control(sc, cy, TIOCM_DTR, DMBIS); break; case TIOCCDTR: /* DTR off */ cy_modem_control(sc, cy, TIOCM_DTR, DMBIC); break; case TIOCMSET: /* set new modem control line values */ cy_modem_control(sc, cy, *((int *) data), DMSET); break; case TIOCMBIS: /* turn modem control bits on */ cy_modem_control(sc, cy, *((int *) data), DMBIS); break; case TIOCMBIC: /* turn modem control bits off */ cy_modem_control(sc, cy, *((int *) data), DMBIC); break; case TIOCMGET: /* get modem control/status line state */ *((int *) data) = cy_modem_control(sc, cy, 0, DMGET); break; case TIOCGFLAGS: *((int *) data) = cy->cy_openflags | (CY_DIALOUT(dev) ? TIOCFLAG_SOFTCAR : 0); break; case TIOCSFLAGS: error = kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_PRIVSET, tp); if (error != 0) return EPERM; cy->cy_openflags = *((int *) data) & (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS | TIOCFLAG_MDMBUF); break; default: return EPASSTHROUGH; } return 0; } /* * start output */ void cystart(struct tty *tp) { struct cy_softc *sc; struct cy_port *cy; int s; cy = CY_PORT(tp->t_dev); sc = cy->cy_softc; s = spltty(); #ifdef CY_DEBUG1 cy->cy_start_count++; #endif if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) { if (!ttypull(tp)) goto out; SET(tp->t_state, TS_BUSY); cy_enable_transmitter(sc, cy); } out: splx(s); } /* * stop output */ void cystop(struct tty *tp, int flag) { struct cy_port *cy; int s; cy = CY_PORT(tp->t_dev); 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 CY_F_STOP has been set. */ SET(cy->cy_flags, CY_F_STOP); } splx(s); } /* * parameter setting routine. * returns 0 if successful, else returns error code */ int cyparam(struct tty *tp, struct termios *t) { struct cy_softc *sc; struct cy_port *cy; int ibpr = 0, obpr = 0, i_clk_opt = 0, o_clk_opt = 0; /* XXX: GCC */ int s, opt; cy = CY_PORT(tp->t_dev); sc = CY_BOARD(cy); 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(sc, cy, TIOCM_DTR, (t->c_ospeed == 0 ? DMBIC : DMBIS)); /* channel was selected by the above call to cy_modem_control() */ #if 0 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, port & CD1400_CAR_CHAN); #endif /* set transmit speed */ if (t->c_ospeed != 0) { cd_write_reg(sc, cy->cy_chip, CD1400_TCOR, o_clk_opt); cd_write_reg(sc, cy->cy_chip, CD1400_TBPR, obpr); } /* set receive speed */ if (t->c_ispeed != 0) { cd_write_reg(sc, cy->cy_chip, CD1400_RCOR, i_clk_opt); cd_write_reg(sc, cy->cy_chip, 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(sc, 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(sc, cy->cy_chip, 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(sc, cy->cy_chip, CD1400_COR2, CD1400_COR2_ETC | (ISSET(t->c_cflag, CRTSCTS) ? CD1400_COR2_CCTS_OFLOW : 0)); cd_write_reg(sc, cy->cy_chip, CD1400_COR3, CY_RX_FIFO_THRESHOLD); cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDCORCHG | CD1400_CCR_COR1 | CD1400_CCR_COR2 | CD1400_CCR_COR3); cd_write_reg(sc, cy->cy_chip, CD1400_COR4, CD1400_COR4_PFO_EXCEPTION); cd_write_reg(sc, cy->cy_chip, CD1400_COR5, 0); /* * set modem change option registers to generate interrupts * on carrier detect changes. * * if hardware RTS handshaking is used * also set the handshaking threshold. */ if (cy->cy_clock == CY_CLOCK_60) { cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd | (ISSET(t->c_cflag, CRTSCTS) ? CY_RX_DTR_THRESHOLD : 0)); } else { cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd); } cd_write_reg(sc, cy->cy_chip, 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(sc, cy->cy_chip, 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 */ int cy_modem_control(struct cy_softc *sc, struct cy_port *cy, int bits, int howto) { struct tty *tp = cy->cy_tty; int s, msvr; s = spltty(); /* select channel */ cd_write_reg(sc, cy->cy_chip, 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(sc, cy->cy_chip, CD1400_MSVR2); if (cy->cy_clock == CY_CLOCK_60) { if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & CD1400_MSVR1_RTS) bits |= TIOCM_DTR; if (msvr & CD1400_MSVR2_DTR) bits |= TIOCM_RTS; } else { if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & CD1400_MSVR1_RTS) bits |= TIOCM_RTS; if (msvr & CD1400_MSVR2_DTR) bits |= TIOCM_DTR; } if (msvr & CD1400_MSVR2_CTS) bits |= TIOCM_CTS; if (msvr & CD1400_MSVR2_CD) bits |= TIOCM_CD; /* Not connected on some Cyclom-Y boards? */ if (msvr & CD1400_MSVR2_DSR) bits |= TIOCM_DSR; /* Not connected on some Cyclom-8Y boards? */ if (msvr & CD1400_MSVR2_RI) bits |= TIOCM_RI; break; case DMSET: /* replace old values with new ones */ if (cy->cy_clock == CY_CLOCK_60) { if (!ISSET(tp->t_cflag, CRTSCTS)) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, ((bits & TIOCM_RTS) ? CD1400_MSVR2_DTR : 0)); cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, ((bits & TIOCM_DTR) ? CD1400_MSVR1_RTS : 0)); } else { if (!ISSET(tp->t_cflag, CRTSCTS)) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, ((bits & TIOCM_RTS) ? CD1400_MSVR1_RTS : 0)); cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, ((bits & TIOCM_DTR) ? CD1400_MSVR2_DTR : 0)); } break; case DMBIS: /* set bits */ if (cy->cy_clock == CY_CLOCK_60) { if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, CD1400_MSVR2_DTR); if (bits & TIOCM_DTR) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, CD1400_MSVR1_RTS); } else { if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, CD1400_MSVR1_RTS); if (bits & TIOCM_DTR) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, CD1400_MSVR2_DTR); } break; case DMBIC: /* clear bits */ if (cy->cy_clock == CY_CLOCK_60) { if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0); if (bits & TIOCM_DTR) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); } else { if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); if (bits & TIOCM_DTR) cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0); } break; } splx(s); return ((howto == DMGET) ? bits : 0); } /* * Upper-level handler loop (called from timer interrupt?) * This routine is common for multiple cards */ void cy_poll(void *arg) { int card, port; struct cy_softc *sc; struct cy_port *cy; struct tty *tp; static int counter = 0; #ifdef CY_DEBUG1 int did_something; #endif int s = spltty(); if (cy_events == 0 && ++counter < 200) { splx(s); goto out; } cy_events = 0; splx(s); for (card = 0; card < cy_cd.cd_ndevs; card++) { sc = device_lookup_private(&cy_cd, card); if (sc == NULL) continue; #ifdef CY_DEBUG1 sc->sc_poll_count1++; did_something = 0; #endif for (port = 0; port < sc->sc_nchannels; port++) { cy = &sc->sc_ports[port]; if ((tp = cy->cy_tty) == NULL || cy->cy_ibuf == NULL || (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0)) 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 aprint_debug_dev(sc->sc_dev, "port %d ttyinput 0x%x\n", port, chr); #endif (*tp->t_linesw->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 } /* * 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(sc, cy->cy_chip, CD1400_CAR, port & CD1400_CAR_CHAN); if (cy->cy_clock == CY_CLOCK_60) { if ((cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2) & CD1400_MSVR2_DTR) == 0) { cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2,CD1400_MSVR2_DTR); #ifdef CY_DEBUG1 did_something = 1; #endif } } else { if ((cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & CD1400_MSVR1_RTS) == 0) { cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1,CD1400_MSVR1_RTS); #ifdef CY_DEBUG1 did_something = 1; #endif } } } /* * handle carrier changes */ s = spltty(); if (ISSET(cy->cy_flags, CY_F_CARRIER_CHANGED)) { int carrier; CLR(cy->cy_flags, CY_F_CARRIER_CHANGED); splx(s); carrier = ((cy->cy_carrier_stat & CD1400_MSVR2_CD) != 0); #ifdef CY_DEBUG printf("cy_poll: carrier change " "(card %d, port %d, carrier %d)\n", card, port, carrier); #endif if (CY_DIALOUT(tp->t_dev) == 0 && !(*tp->t_linesw->l_modem)(tp, carrier)) cy_modem_control(sc, cy, TIOCM_DTR, DMBIC); #ifdef CY_DEBUG1 did_something = 1; #endif } else splx(s); s = spltty(); if (ISSET(cy->cy_flags, CY_F_START)) { CLR(cy->cy_flags, CY_F_START); splx(s); (*tp->t_linesw->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", device_xname(sc->sc_dev), port); } if (cy->cy_ibuf_overruns) { cy->cy_ibuf_overruns = 0; log(LOG_WARNING, "%s: port %d ibuf overrun\n", device_xname(sc->sc_dev), port); } } /* for(port...) */ #ifdef CY_DEBUG1 if (did_something && counter >= 200) sc->sc_poll_count2++; #endif } /* for(card...) */ counter = 0; out: callout_reset(&cy_poll_callout, 1, cy_poll, NULL); } /* * hardware interrupt routine */ int cy_intr(void *arg) { struct cy_softc *sc = arg; struct cy_port *cy; int cy_chip, stat; int int_serviced = 0; /* * 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_nchips; cy_chip++) { stat = cd_read_reg(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, cy_chip, CD1400_RIR); save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); /* enter rx service */ cd_write_reg(sc, cy_chip, CD1400_CAR, save_rir); serv_type = cd_read_reg(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(sc, cy->cy_chip, CD1400_RDSR); recv_data = cd_read_reg(sc, cy->cy_chip, CD1400_RDSR); if (cy->cy_tty == NULL || !ISSET(cy->cy_tty->t_state, TS_ISOPEN)) goto end_rx_serv; #ifdef CY_DEBUG aprint_debug_dev( sc->sc_dev, "port %d recv exception, " "line_stat 0x%x, char 0x%x\n", 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++; } cy_events = 1; } else {/* no exception, received data OK */ n_chars = cd_read_reg(sc, cy->cy_chip, 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--) (void)cd_read_reg(sc, cy->cy_chip, CD1400_RDSR); goto end_rx_serv; } #ifdef CY_DEBUG aprint_debug_dev(sc->sc_dev, "port %d receive ok %d chars\n", cy->cy_port_num, n_chars); #endif while (n_chars--) { *buf_p++ = 0; /* status: OK */ /* data byte */ *buf_p++ = cd_read_reg(sc, cy->cy_chip, CD1400_RDSR); 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; } } cy_events = 1; } cy->cy_ibuf_wr_ptr = buf_p; /* RTS handshaking for incoming data */ if (ISSET(cy->cy_tty->t_cflag, CRTSCTS)) { int bf, msvr; bf = buf_p - cy->cy_ibuf_rd_ptr; if (bf < 0) bf += CY_IBUF_SIZE; if (bf > (CY_IBUF_SIZE / 2)) { /* turn RTS off */ if (cy->cy_clock == CY_CLOCK_60) msvr = CD1400_MSVR2; else msvr = CD1400_MSVR1; cd_write_reg(sc, cy->cy_chip, msvr, 0); } } end_rx_serv: /* terminate service context */ cd_write_reg(sc, cy->cy_chip, CD1400_RIR, save_rir & 0x3f); cd_write_reg(sc, cy->cy_chip, 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, cy_chip, CD1400_MIR); save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); /* enter modem service */ cd_write_reg(sc, cy_chip, CD1400_CAR, save_mir); serv_type = cd_read_reg(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(sc, cy->cy_chip, CD1400_MSVR2); #ifdef CY_DEBUG aprint_debug_dev(sc->sc_dev, "port %d modem line change, new stat 0x%x\n", cy->cy_port_num, modem_stat); #endif if (ISSET((cy->cy_carrier_stat ^ modem_stat), CD1400_MSVR2_CD)) { SET(cy->cy_flags, CY_F_CARRIER_CHANGED); cy_events = 1; } cy->cy_carrier_stat = modem_stat; /* terminate service context */ cd_write_reg(sc, cy->cy_chip, CD1400_MIR, save_mir & 0x3f); cd_write_reg(sc, cy->cy_chip, 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, cy_chip, CD1400_TIR); save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); /* enter tx service */ cd_write_reg(sc, cy_chip, CD1400_CAR, save_tir); serv_type = cd_read_reg(sc, cy_chip, CD1400_TIVR); cy = &sc->sc_ports[serv_type >> 3]; #ifdef CY_DEBUG1 cy->cy_tx_int_count++; #endif #ifdef CY_DEBUG aprint_debug_dev(sc->sc_dev, "port %d tx service\n", cy->cy_port_num); #endif /* stop transmitting if no tty or CY_F_STOP set */ tp = cy->cy_tty; if (tp == NULL || ISSET(cy->cy_flags, CY_F_STOP)) goto txdone; count = 0; if (ISSET(cy->cy_flags, CY_F_SEND_NUL)) { cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); count += 2; CLR(cy->cy_flags, CY_F_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, CY_F_SEND_NUL); break; } cd_write_reg(sc, cy->cy_chip, CD1400_TDR, ch); count++; } cd_write_reg(sc, cy->cy_chip, 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, CY_F_START_BREAK)) { cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0x81); CLR(cy->cy_flags, CY_F_START_BREAK); } if (ISSET(cy->cy_flags, CY_F_END_BREAK)) { cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0x83); CLR(cy->cy_flags, CY_F_END_BREAK); } } if (tp->t_outq.c_cc == 0) { txdone: /* * No data to send or requested to stop. * Disable transmit interrupt */ cd_write_reg(sc, cy->cy_chip, CD1400_SRER, cd_read_reg(sc, cy->cy_chip, CD1400_SRER) & ~CD1400_SRER_TXRDY); CLR(cy->cy_flags, CY_F_STOP); CLR(tp->t_state, TS_BUSY); } if (tp->t_outq.c_cc <= tp->t_lowat) { SET(cy->cy_flags, CY_F_START); cy_events = 1; } /* terminate service context */ cd_write_reg(sc, cy->cy_chip, CD1400_TIR, save_tir & 0x3f); cd_write_reg(sc, cy->cy_chip, 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_bsh, CY_CLEAR_INTR << sc->sc_bustype, 0); return int_serviced; } /* * subroutine to enable CD1400 transmitter */ void cy_enable_transmitter(struct cy_softc *sc, struct cy_port *cy) { int s = spltty(); cd_write_reg(sc, cy->cy_chip, CD1400_CAR, cy->cy_port_num & CD1400_CAR_CHAN); cd_write_reg(sc, cy->cy_chip, CD1400_SRER, cd_read_reg(sc, cy->cy_chip, CD1400_SRER) | CD1400_SRER_TXRDY); splx(s); } /* * Execute a CD1400 channel command */ void cd1400_channel_cmd(struct cy_softc *sc, 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(sc, cy->cy_chip, CD1400_CCR) != 0 && waitcnt-- > 0); if (waitcnt == 0) log(LOG_ERR, "%s: channel command timeout\n", device_xname(sc->sc_dev)); cd_write_reg(sc, cy->cy_chip, 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; }