/* $NetBSD: clpscom.c,v 1.11 2023/09/01 08:53:52 andvar Exp $ */ /* * Copyright (c) 2013 KIYOHARA Takashi * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. */ #include __KERNEL_RCSID(0, "$NetBSD: clpscom.c,v 1.11 2023/09/01 08:53:52 andvar Exp $"); #include "rnd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef RND_COM #include #endif #include "ioconf.h" #include "locators.h" #define COMUNIT(x) TTUNIT(x) #define COMDIALOUT(x) TTDIALOUT(x) #define CLPSCOM_RING_SIZE 2048 #define UART_FIFO_SIZE 16 #define CLPSCOM_READ_CON(sc) \ bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_SYSCON) #define CLPSCOM_WRITE_CON(sc, val) \ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_SYSCON, (val)) #define CLPSCOM_READ_FLG(sc) \ bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_SYSFLG) #define CLPSCOM_WRITE_FLG(sc, val) \ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_SYSFLG, (val)) #define CLPSCOM_READ(sc) \ bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_UARTDR) #define CLPSCOM_WRITE(sc, val) \ bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, PS711X_UARTDR, (val)) #define CLPSCOM_WRITE_MULTI(sc, val, n) \ bus_space_write_multi_1((sc)->sc_iot, (sc)->sc_ioh, PS711X_UARTDR, (val), (n)) #define CLPSCOM_READ_UBRLCR(sc) \ bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_UBRLCR) #define CLPSCOM_WRITE_UBRLCR(sc, val) \ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_UBRLCR, (val)) struct clpscom_softc { device_t sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; int sc_irq[3]; void *sc_ih[3]; #define CLPSCOM_TXINT 0 #define CLPSCOM_RXINT 1 #define CLPSCOM_MSINT 2 void *sc_si; struct tty *sc_tty; u_char *sc_tba; u_int sc_tbc; u_char *sc_rbuf; char *volatile sc_rbget; char *volatile sc_rbput; volatile int sc_rbavail; #define CLPSCOM_MODEM_STATUS_MASK (SYSFLG_DCD | SYSFLG_DSR | SYSFLG_CTS) uint32_t sc_ms; uint32_t sc_ms_dcd; uint32_t sc_ms_cts; uint32_t sc_ms_mask; uint32_t sc_ms_delta; int sc_tx_stopped; int sc_tx_done; int sc_rx_ready; int sc_ms_changed; int sc_hwflags; #define COM_HW_CONSOLE (1 << 0) #define COM_HW_DEV_OK (1 << 1) #define COM_HW_KGDB (1 << 2) int sc_swflags; #ifdef RND_COM krndsource_t rnd_source; #endif }; static int clpscom_match(device_t, cfdata_t, void *); static void clpscom_attach(device_t, device_t, void *); static int clpscom_txintr(void *); static int clpscom_rxintr(void *); static int clpscom_msintr(void *); static void clpscom_soft(void *); static void clpscom_start(struct tty *); static int clpscom_param(struct tty *, struct termios *); static int clpscom_hwiflow(struct tty *, int); dev_type_open(clpscomopen); dev_type_close(clpscomclose); dev_type_read(clpscomread); dev_type_write(clpscomwrite); dev_type_ioctl(clpscomioctl); dev_type_stop(clpscomstop); dev_type_tty(clpscomtty); dev_type_poll(clpscompoll); static void clpscom_iflush(struct clpscom_softc *); static void clpscom_shutdown(struct clpscom_softc *); static void clpscom_break(struct clpscom_softc *, int); static int clpscom_to_tiocm(struct clpscom_softc *); static void clpscom_rxsoft(struct clpscom_softc *, struct tty *); static void clpscom_mssoft(struct clpscom_softc *, struct tty *); static inline uint32_t clpscom_rate2ubrlcr(int); static uint32_t clpscom_cflag2ubrlcr(tcflag_t); static int clpscom_cngetc(dev_t); static void clpscom_cnputc(dev_t, int); static void clpscom_cnpollc(dev_t, int); CFATTACH_DECL_NEW(clpscom, sizeof(struct clpscom_softc), clpscom_match, clpscom_attach, NULL, NULL); const struct cdevsw clpscom_cdevsw = { .d_open = clpscomopen, .d_close = clpscomclose, .d_read = clpscomread, .d_write = clpscomwrite, .d_ioctl = clpscomioctl, .d_stop = clpscomstop, .d_tty = clpscomtty, .d_poll = clpscompoll, .d_mmap = nommap, .d_kqfilter = ttykqfilter, .d_discard = nodiscard, .d_flag = D_TTY }; static struct cnm_state clpscom_cnm_state; static vaddr_t clpscom_cnaddr = 0; static int clpscom_cnrate; static tcflag_t clpscom_cncflag; /* ARGSUSED */ static int clpscom_match(device_t parent, cfdata_t match, void *aux) { return 1; } /* ARGSUSED */ static void clpscom_attach(device_t parent, device_t self, void *aux) { struct clpscom_softc *sc = device_private(self); struct clpssoc_attach_args *aa = aux; int i; aprint_naive("\n"); aprint_normal("\n"); sc->sc_dev = self; sc->sc_iot = aa->aa_iot; sc->sc_ioh = *aa->aa_ioh; for (i = 0; i < __arraycount(aa->aa_irq); i++) { sc->sc_irq[i] = aa->aa_irq[i]; sc->sc_ih[i] = NULL; } if (clpscom_cnaddr != 0) SET(sc->sc_hwflags, COM_HW_CONSOLE); sc->sc_tty = tty_alloc(); sc->sc_tty->t_oproc = clpscom_start; sc->sc_tty->t_param = clpscom_param; sc->sc_tty->t_hwiflow = clpscom_hwiflow; sc->sc_tbc = 0; sc->sc_rbuf = kmem_alloc(CLPSCOM_RING_SIZE << 1, KM_SLEEP); sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; sc->sc_rbavail = CLPSCOM_RING_SIZE; tty_attach(sc->sc_tty); if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { int maj = cdevsw_lookup_major(&clpscom_cdevsw); sc->sc_tty->t_dev = makedev(maj, device_unit(sc->sc_dev)); cn_tab->cn_dev = sc->sc_tty->t_dev; aprint_normal_dev(self, "console\n"); } sc->sc_si = softint_establish(SOFTINT_SERIAL, clpscom_soft, sc); #ifdef RND_COM rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), RND_TYPE_TTY, RND_FLAG_DEFAULT); #endif SET(sc->sc_hwflags, COM_HW_DEV_OK); } static int clpscom_txintr(void *arg) { struct clpscom_softc *sc = arg; uint32_t sysflg; if (!device_is_active(sc->sc_dev)) return 0; sysflg = CLPSCOM_READ_FLG(sc); /* * Done handling any receive interrupts. See if data can be * transmitted as well. Schedule tx done event if no data left * and tty was marked busy. */ if (!ISSET(sysflg, SYSFLG_UTXFF)) { /* Output the next chunk of the contiguous buffer, if any. */ if (sc->sc_tbc > 0) { while (sc->sc_tbc > 0 && !ISSET(sysflg, SYSFLG_UTXFF)) { CLPSCOM_WRITE(sc, *sc->sc_tba); sc->sc_tba++; sc->sc_tbc--; sysflg = CLPSCOM_READ_FLG(sc); } } else if (!ISSET(sysflg, SYSFLG_UBUSY) && sc->sc_ih[CLPSCOM_TXINT] != NULL) { intr_disestablish(sc->sc_ih[CLPSCOM_TXINT]); sc->sc_ih[CLPSCOM_TXINT] = NULL; sc->sc_tx_done = 1; } } /* Wake up the poller. */ softint_schedule(sc->sc_si); return 1; } static int clpscom_rxintr(void *arg) { struct clpscom_softc *sc = arg; int cc; uint32_t sysflg; uint16_t data; u_char *put; if (!device_is_active(sc->sc_dev)) return 0; if (sc->sc_ih[CLPSCOM_RXINT] != NULL) { put = sc->sc_rbput; cc = sc->sc_rbavail; while (cc > 0) { sysflg = CLPSCOM_READ_FLG(sc); if (ISSET(sysflg, SYSFLG_URXFE)) break; data = CLPSCOM_READ(sc); cn_check_magic(sc->sc_tty->t_dev, data & 0xff, clpscom_cnm_state); put[0] = data & 0xff; put[1] = (data >> 8) & 0xff; put += 2; if (put >= sc->sc_rbuf + (CLPSCOM_RING_SIZE << 1)) put = sc->sc_rbuf; cc--; sc->sc_rx_ready = 1; } /* * Current string of incoming characters ended because * no more data was available or we ran out of space. * Schedule a receive event if any data was received. * If we're out of space, turn off receive interrupts. */ sc->sc_rbput = put; sc->sc_rbavail = cc; /* * See if we are in danger of overflowing a buffer. If * so, use hardware flow control to ease the pressure. */ /* but clpscom cannot. X-( */ /* * If we're out of space, disable receive interrupts * until the queue has drained a bit. */ if (cc <= 0) { intr_disestablish(sc->sc_ih[CLPSCOM_RXINT]); sc->sc_ih[CLPSCOM_RXINT] = NULL; } } /* Wake up the poller. */ softint_schedule(sc->sc_si); return 1; } static int clpscom_msintr(void *arg) { struct clpscom_softc *sc = arg; uint32_t ms, delta; if (!device_is_active(sc->sc_dev)) return 0; if (sc->sc_ih[CLPSCOM_MSINT] != NULL) { ms = CLPSCOM_READ_FLG(sc) & CLPSCOM_MODEM_STATUS_MASK; delta = ms ^ sc->sc_ms; sc->sc_ms = ms; if (ISSET(delta, sc->sc_ms_mask)) { SET(sc->sc_ms_delta, delta); /* * Stop output immediately if we lose the output * flow control signal or carrier detect. */ if (ISSET(~ms, sc->sc_ms_mask)) sc->sc_tbc = 0; sc->sc_ms_changed = 1; } } bus_space_write_4(sc->sc_iot, sc->sc_ioh, PS711X_UMSEOI, 1); /* Wake up the poller. */ softint_schedule(sc->sc_si); return 1; } static void clpscom_soft(void *arg) { struct clpscom_softc *sc = arg; struct tty *tp = sc->sc_tty; if (!device_is_active(sc->sc_dev)) return; if (sc->sc_rx_ready) { sc->sc_rx_ready = 0; clpscom_rxsoft(sc, tp); } if (sc->sc_tx_done) { sc->sc_tx_done = 0; CLR(tp->t_state, TS_BUSY); if (ISSET(tp->t_state, TS_FLUSH)) CLR(tp->t_state, TS_FLUSH); else ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); (*tp->t_linesw->l_start)(tp); } if (sc->sc_ms_changed == 1) { sc->sc_ms_changed = 0; clpscom_mssoft(sc, tp); } } static void clpscom_start(struct tty *tp) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(tp->t_dev)); int s, n; if (!device_is_active(sc->sc_dev)) 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); if (sc->sc_ih[CLPSCOM_TXINT] == NULL) { sc->sc_ih[CLPSCOM_TXINT] = intr_establish(sc->sc_irq[CLPSCOM_TXINT], IPL_SERIAL, 0, clpscom_txintr, sc); if (sc->sc_ih[CLPSCOM_TXINT] == NULL) printf("%s: can't establish tx interrupt\n", device_xname(sc->sc_dev)); /* Output the first chunk of the contiguous buffer. */ n = uimin(sc->sc_tbc, UART_FIFO_SIZE); CLPSCOM_WRITE_MULTI(sc, sc->sc_tba, n); sc->sc_tba += n; sc->sc_tbc -= n; } out: splx(s); return; } static int clpscom_param(struct tty *tp, struct termios *t) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(tp->t_dev)); int s; if (!device_is_active(sc->sc_dev)) return ENXIO; if (t->c_ispeed && t->c_ispeed != t->c_ospeed) return EINVAL; /* * For the console, always force CLOCAL and !HUPCL, so that the port * is always active. */ if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { SET(t->c_cflag, CLOCAL); CLR(t->c_cflag, HUPCL); } /* * If there were no changes, don't do anything. This avoids dropping * input and improves performance when all we did was frob things like * VMIN and VTIME. */ if (tp->t_ospeed == t->c_ospeed && tp->t_cflag == t->c_cflag) return 0; /* * If we're not in a mode that assumes a connection is present, then * ignore carrier changes. */ if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) sc->sc_ms_dcd = 0; else sc->sc_ms_dcd = SYSFLG_DCD; /* * Set the flow control pins depending on the current flow control * mode. */ if (ISSET(t->c_cflag, CRTSCTS)) { sc->sc_ms_cts = SYSFLG_CTS; } else if (ISSET(t->c_cflag, MDMBUF)) { /* * For DTR/DCD flow control, make sure we don't toggle DTR for * carrier detection. */ sc->sc_ms_cts = SYSFLG_DCD; } else { /* * If no flow control, then always set RTS. This will make * the other side happy if it mistakenly thinks we're doing * RTS/CTS flow control. */ sc->sc_ms_cts = 0; } sc->sc_ms_mask = sc->sc_ms_cts | sc->sc_ms_dcd; s = splserial(); CLPSCOM_WRITE_UBRLCR(sc, UBRLCR_FIFOEN | clpscom_rate2ubrlcr(t->c_ospeed) | clpscom_cflag2ubrlcr(t->c_cflag)); /* And copy to tty. */ tp->t_ispeed = 0; tp->t_ospeed = t->c_ospeed; tp->t_cflag = t->c_cflag; splx(s); /* * Update the tty layer's idea of the carrier bit, in case we changed * CLOCAL or MDMBUF. We don't hang up here; we only do that by * explicit request. */ (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_ms, SYSFLG_DCD)); if (!ISSET(t->c_cflag, CHWFLOW)) if (sc->sc_tx_stopped) { sc->sc_tx_stopped = 0; clpscom_start(tp); } return 0; } static int clpscom_hwiflow(struct tty *tp, int block) { /* Nothing */ return 0; } /* ARGSUSED */ int clpscomopen(dev_t dev, int flag, int mode, struct lwp *l) { struct clpscom_softc *sc; struct tty *tp; int error, s, s2; sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) return ENXIO; if (!device_is_active(sc->sc_dev)) return ENXIO; #ifdef KGDB /* * If this is the kgdb port, no other use is permitted. */ if (ISSET(sc->sc_hwflags, COM_HW_KGDB)) return EBUSY; #endif tp = sc->sc_tty; if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) return EBUSY; s = spltty(); /* * Do the following iff this is a first open. */ if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { struct termios t; tp->t_dev = dev; /* Enable and turn on interrupt */ CLPSCOM_WRITE_CON(sc, CLPSCOM_READ_CON(sc) | SYSCON_UARTEN); /* Fetch the current modem control status, needed later. */ sc->sc_ms = CLPSCOM_READ_FLG(sc) & CLPSCOM_MODEM_STATUS_MASK; /* * Initialize the termios status to the defaults. Add in the * sticky bits from TIOCSFLAGS. */ t.c_ispeed = 0; if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { t.c_ospeed = clpscom_cnrate; t.c_cflag = clpscom_cncflag; } else { t.c_ospeed = TTYDEF_SPEED; t.c_cflag = TTYDEF_CFLAG; } if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) SET(t.c_cflag, CLOCAL); if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) SET(t.c_cflag, CRTSCTS); if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) SET(t.c_cflag, MDMBUF); /* Make sure pscom_param() we do something */ tp->t_ospeed = 0; clpscom_param(tp, &t); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_lflag = TTYDEF_LFLAG; ttychars(tp); ttsetwater(tp); s2 = splserial(); /* Clear the input ring. */ sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; sc->sc_rbavail = CLPSCOM_RING_SIZE; clpscom_iflush(sc); splx(s2); } splx(s); error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); if (error) goto bad; error = (*tp->t_linesw->l_open)(dev, tp); if (error) goto bad; return 0; bad: if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { /* * We failed to open the device, and nobody else had it opened. * Clean up the state as appropriate. */ clpscom_shutdown(sc); /* Disable UART */ if (!ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) CLPSCOM_WRITE_CON(sc, CLPSCOM_READ_CON(sc) & ~SYSCON_UARTEN); } return error; } /* ARGSUSED */ int clpscomclose(dev_t dev, int flag, int mode, struct lwp *l) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; /* XXXX This is for cons.c. */ if (!ISSET(tp->t_state, TS_ISOPEN)) return 0; (*tp->t_linesw->l_close)(tp, flag); ttyclose(tp); if (!device_is_active(sc->sc_dev)) return 0; if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { /* * Although we got a last close, the device may still be in * use; e.g. if this was the dialout node, and there are still * processes waiting for carrier on the non-dialout node. */ clpscom_shutdown(sc); /* Disable UART */ if (!ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) CLPSCOM_WRITE_CON(sc, CLPSCOM_READ_CON(sc) & ~SYSCON_UARTEN); } return 0; } int clpscomread(dev_t dev, struct uio *uio, int flag) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; if (!device_is_active(sc->sc_dev)) return EIO; return (*tp->t_linesw->l_read)(tp, uio, flag); } int clpscomwrite(dev_t dev, struct uio *uio, int flag) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; if (!device_is_active(sc->sc_dev)) return EIO; return (*tp->t_linesw->l_write)(tp, uio, flag); } int clpscomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; int error, s; if (!device_is_active(sc->sc_dev)) return EIO; 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; switch (cmd) { case TIOCSFLAGS: error = kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_PRIVSET, tp); break; default: break; } if (error) return error; s = splserial(); error = 0; switch (cmd) { case TIOCSBRK: clpscom_break(sc, 1); break; case TIOCCBRK: clpscom_break(sc, 0); break; case TIOCGFLAGS: *(int *)data = sc->sc_swflags; break; case TIOCSFLAGS: sc->sc_swflags = *(int *)data; break; case TIOCMGET: *(int *)data = clpscom_to_tiocm(sc); break; default: error = EPASSTHROUGH; break; } splx(s); return error; } int clpscompoll(dev_t dev, int events, struct lwp *l) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; if (!device_is_active(sc->sc_dev)) return EIO; return (*tp->t_linesw->l_poll)(tp, events, l); } struct tty * clpscomtty(dev_t dev) { struct clpscom_softc *sc = device_lookup_private(&clpscom_cd, COMUNIT(dev)); return sc->sc_tty; } void clpscomstop(struct tty *tp, int flag) { int s; s = splserial(); if (ISSET(tp->t_state, TS_BUSY)) { /* Stop transmitting at the next chunk. */ if (!ISSET(tp->t_state, TS_TTSTOP)) SET(tp->t_state, TS_FLUSH); } splx(s); } static void clpscom_iflush(struct clpscom_softc *sc) { int timo; timo = 50000; while ((CLPSCOM_READ_FLG(sc) & SYSFLG_URXFE) == 0 && timo--) CLPSCOM_READ(sc); if (timo == 0) printf("%s: iflush timeout\n", device_xname(sc->sc_dev)); } static void clpscom_shutdown(struct clpscom_softc *sc) { int s; s = splserial(); /* Turn off all interrupts */ if (sc->sc_ih[CLPSCOM_TXINT] != NULL) intr_disestablish(sc->sc_ih[CLPSCOM_TXINT]); sc->sc_ih[CLPSCOM_TXINT] = NULL; if (sc->sc_ih[CLPSCOM_RXINT] != NULL) intr_disestablish(sc->sc_ih[CLPSCOM_RXINT]); sc->sc_ih[CLPSCOM_RXINT] = NULL; if (sc->sc_ih[CLPSCOM_MSINT] != NULL) intr_disestablish(sc->sc_ih[CLPSCOM_MSINT]); sc->sc_ih[CLPSCOM_MSINT] = NULL; /* Clear any break condition set with TIOCSBRK. */ clpscom_break(sc, 0); splx(s); } static void clpscom_break(struct clpscom_softc *sc, int onoff) { int s; uint8_t ubrlcr; s = splserial(); ubrlcr = CLPSCOM_READ_UBRLCR(sc); if (onoff) SET(ubrlcr, UBRLCR_BREAK); else CLR(ubrlcr, UBRLCR_BREAK); CLPSCOM_WRITE_UBRLCR(sc, ubrlcr); splx(s); } static int clpscom_to_tiocm(struct clpscom_softc *sc) { uint32_t combits; int ttybits = 0; combits = sc->sc_ms; if (ISSET(combits, SYSFLG_DCD)) SET(ttybits, TIOCM_CD); if (ISSET(combits, SYSFLG_CTS)) SET(ttybits, TIOCM_CTS); if (ISSET(combits, SYSFLG_DSR)) SET(ttybits, TIOCM_DSR); return ttybits; } static void clpscom_rxsoft(struct clpscom_softc *sc, struct tty *tp) { int code, s; u_int cc, scc; u_char sts, *get; get = sc->sc_rbget; scc = cc = CLPSCOM_RING_SIZE - sc->sc_rbavail; while (cc) { code = get[0]; sts = get[1]; if (ISSET(sts, UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR)) { if (ISSET(sts, (UARTDR_FRMERR))) SET(code, TTY_FE); if (ISSET(sts, UARTDR_PARERR)) SET(code, TTY_PE); if (ISSET(sts, UARTDR_OVERR)) ; /* XXXXX: Overrun */ } if ((*tp->t_linesw->l_rint)(code, tp) == -1) { /* * The line discipline's buffer is out of space. */ /* * We're either not using flow control, or the * line discipline didn't tell us to block for * some reason. Either way, we have no way to * know when there's more space available, so * just drop the rest of the data. */ get += cc << 1; if (get >= sc->sc_rbuf + (CLPSCOM_RING_SIZE << 1)) get -= (CLPSCOM_RING_SIZE << 1); cc = 0; break; } get += 2; if (get >= sc->sc_rbuf + (CLPSCOM_RING_SIZE << 1)) get = sc->sc_rbuf; cc--; } if (cc != scc) { sc->sc_rbget = get; s = splserial(); cc = sc->sc_rbavail += scc - cc; /* Buffers should be ok again, release possible block. */ if (cc >= 1) { if (sc->sc_ih[CLPSCOM_RXINT] == NULL) { sc->sc_ih[CLPSCOM_RXINT] = intr_establish(sc->sc_irq[CLPSCOM_RXINT], IPL_SERIAL, 0, clpscom_rxintr, sc); if (sc->sc_ih[CLPSCOM_RXINT] == NULL) printf("%s: can't establish" " rx interrupt\n", device_xname(sc->sc_dev)); } if (sc->sc_ih[CLPSCOM_MSINT] == NULL) { sc->sc_ih[CLPSCOM_MSINT] = intr_establish(sc->sc_irq[CLPSCOM_MSINT], IPL_SERIAL, 0, clpscom_msintr, sc); if (sc->sc_ih[CLPSCOM_MSINT] == NULL) printf("%s: can't establish" " ms interrupt\n", device_xname(sc->sc_dev)); } } splx(s); } } static void clpscom_mssoft(struct clpscom_softc *sc, struct tty *tp) { uint32_t ms, delta; ms = sc->sc_ms; delta = sc->sc_ms_delta; sc->sc_ms_delta = 0; if (ISSET(delta, sc->sc_ms_dcd)) /* * Inform the tty layer that carrier detect changed. */ (void) (*tp->t_linesw->l_modem)(tp, ISSET(ms, SYSFLG_DCD)); if (ISSET(delta, sc->sc_ms_cts)) { /* Block or unblock output according to flow control. */ if (ISSET(ms, sc->sc_ms_cts)) { sc->sc_tx_stopped = 0; (*tp->t_linesw->l_start)(tp); } else sc->sc_tx_stopped = 1; } } static inline uint32_t clpscom_rate2ubrlcr(int rate) { return 230400 / rate - 1; } static uint32_t clpscom_cflag2ubrlcr(tcflag_t cflag) { int32_t ubrlcr = 0; switch (cflag & CSIZE) { case CS5: SET(ubrlcr, UBRLCR_WRDLEN_5B); break; case CS6: SET(ubrlcr, UBRLCR_WRDLEN_6B); break; case CS7: SET(ubrlcr, UBRLCR_WRDLEN_7B); break; case CS8: SET(ubrlcr, UBRLCR_WRDLEN_8B); break; default: SET(ubrlcr, UBRLCR_WRDLEN_8B); break; } if (cflag & CSTOPB) SET(ubrlcr, UBRLCR_XSTOP); if (cflag & PARENB) { SET(ubrlcr, (UBRLCR_PRTEN | UBRLCR_EVENPRT)); if (cflag & PARODD) CLR(ubrlcr, UBRLCR_EVENPRT); } return ubrlcr; } #define CLPSCOM_CNREAD() \ (*(volatile uint32_t *)(clpscom_cnaddr + PS711X_UARTDR)) #define CLPSCOM_CNWRITE(val) \ (*(volatile uint8_t *)(clpscom_cnaddr + PS711X_UARTDR) = val) #define CLPSCOM_CNSTATUS() \ (*(volatile uint32_t *)(clpscom_cnaddr + PS711X_SYSFLG)) static struct consdev clpscomcons = { NULL, NULL, clpscom_cngetc, clpscom_cnputc, clpscom_cnpollc, NULL, NULL, NULL, NODEV, CN_NORMAL }; int clpscom_cnattach(vaddr_t addr, int rate, tcflag_t cflag) { clpscom_cnaddr = addr; clpscom_cnrate = rate; clpscom_cncflag = cflag; *(volatile uint32_t *)(clpscom_cnaddr + PS711X_SYSFLG) |= SYSCON_UARTEN; *(volatile uint32_t *)(clpscom_cnaddr + PS711X_UBRLCR) = UBRLCR_FIFOEN | clpscom_cflag2ubrlcr(cflag) | clpscom_rate2ubrlcr(rate); cn_tab = &clpscomcons; cn_init_magic(&clpscom_cnm_state); cn_set_magic("\047\001"); /* default magic is BREAK */ return 0; } /* ARGSUSED */ static int clpscom_cngetc(dev_t dev) { int s = splserial(); char ch; while (CLPSCOM_CNSTATUS() & SYSFLG_URXFE); ch = CLPSCOM_CNREAD(); if (!db_active) cn_check_magic(dev, ch, clpscom_cnm_state); splx(s); return ch; } /* ARGSUSED */ static void clpscom_cnputc(dev_t dev, int c) { int s = splserial(); while (CLPSCOM_CNSTATUS() & SYSFLG_UTXFF); CLPSCOM_CNWRITE(c); /* Make sure output. */ while (CLPSCOM_CNSTATUS() & SYSFLG_UBUSY); splx(s); } /* ARGSUSED */ static void clpscom_cnpollc(dev_t dev, int on) { /* Nothing */ }