/* $NetBSD: sa11x0_com.c,v 1.55 2015/04/13 21:18:41 riastradh Exp $ */ /*- * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by IWAMOTO Toshihiro. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Copyright (c) 1991 The Regents of the University of California. * 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 University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)com.c 7.5 (Berkeley) 5/16/91 */ #include __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.55 2015/04/13 21:18:41 riastradh Exp $"); #include "opt_com.h" #include "opt_ddb.h" #include "opt_ddbparam.h" #include "opt_kgdb.h" #include "opt_multiprocessor.h" #include "opt_lockdebug.h" #ifdef RND_COM #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef hpcarm #include #include #endif #include "sacom.h" dev_type_open(sacomopen); dev_type_close(sacomclose); dev_type_read(sacomread); dev_type_write(sacomwrite); dev_type_ioctl(sacomioctl); dev_type_stop(sacomstop); dev_type_tty(sacomtty); dev_type_poll(sacompoll); const struct cdevsw sacom_cdevsw = { .d_open = sacomopen, .d_close = sacomclose, .d_read = sacomread, .d_write = sacomwrite, .d_ioctl = sacomioctl, .d_stop = sacomstop, .d_tty = sacomtty, .d_poll = sacompoll, .d_mmap = nommap, .d_kqfilter = ttykqfilter, .d_discard = nodiscard, .d_flag = D_TTY }; static int sacom_match(device_t, cfdata_t, void *); static void sacom_attach(device_t, device_t, void *); static void sacom_filltx(struct sacom_softc *); static void sacom_attach_subr(struct sacom_softc *); #if defined(DDB) || defined(KGDB) static void sacom_enable_debugport(struct sacom_softc *); #endif int sacom_detach(device_t, int); void sacom_config(struct sacom_softc *); int sacom_activate(device_t, enum devact); void sacom_shutdown(struct sacom_softc *); static u_int cflag2cr0(tcflag_t); int sacomparam(struct tty *, struct termios *); void sacomstart(struct tty *); int sacomhwiflow(struct tty *, int); void sacom_loadchannelregs(struct sacom_softc *); void sacom_hwiflow(struct sacom_softc *); void sacom_break(struct sacom_softc *, int); void sacom_modem(struct sacom_softc *, int); void tiocm_to_sacom(struct sacom_softc *, u_long, int); int sacom_to_tiocm(struct sacom_softc *); void sacom_iflush(struct sacom_softc *); int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, bus_space_handle_t *); int sacom_is_console(bus_space_tag_t, bus_addr_t, bus_space_handle_t *); void sacomsoft(void *); static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); static inline void sacom_txsoft(struct sacom_softc *, struct tty *); static inline void sacom_stsoft(struct sacom_softc *, struct tty *); static inline void sacom_schedrx(struct sacom_softc *); #ifdef hpcarm /* HPCARM specific functions */ static void sacom_j720_init(device_t, device_t); #endif #define COMDIALOUT_MASK TTDIALOUT_MASK #define COMUNIT(x) TTUNIT(x) #define COMDIALOUT(x) TTDIALOUT(x) #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ device_is_active((sc)->sc_dev)) #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) #define COM_LOCK(sc) #define COM_UNLOCK(sc) int sacomintr(void *); int sacomcngetc(dev_t); void sacomcnputc(dev_t, int); void sacomcnpollc(dev_t, int); void sacomcnprobe(struct consdev *); void sacomcninit(struct consdev *); extern struct bus_space sa11x0_bs_tag; static bus_space_tag_t sacomconstag; static bus_space_handle_t sacomconsioh; static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ static int sacomconsattached; static int sacomconsrate; static tcflag_t sacomconscflag; CFATTACH_DECL_NEW(sacom, sizeof(struct sacom_softc), sacom_match, sacom_attach, NULL, NULL); extern struct cfdriver sacom_cd; #ifdef hpcarm struct platid_data sacom_platid_table[] = { { &platid_mask_MACH_HP_JORNADA_7XX, sacom_j720_init }, { NULL, NULL } }; #endif struct consdev sacomcons = { NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, NULL, NULL, NODEV, CN_NORMAL }; #ifndef CONMODE #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ #endif #ifndef CONSPEED #define CONSPEED 9600 #endif #ifndef CONADDR #define CONADDR SACOM3_BASE #endif static int sacom_match(device_t parent, cfdata_t match, void *aux) { return 1; } void sacom_attach(device_t parent, device_t self, void *aux) { struct sacom_softc *sc = device_private(self); struct sa11x0_attach_args *sa = aux; #ifdef hpcarm struct platid_data *p; void (*mdinit)(device_t, device_t); #endif aprint_normal("\n"); sc->sc_dev = self; sc->sc_iot = sa->sa_iot; sc->sc_baseaddr = sa->sa_addr; if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, &sc->sc_ioh)) { aprint_normal_dev(self, "unable to map registers\n"); return; } switch (sc->sc_baseaddr) { case SACOM1_BASE: aprint_normal_dev(self, "SA-11x0 UART1\n"); break; case SACOM2_BASE: aprint_normal_dev(self, "SA-11x0 UART2 (IRDA)\n"); break; case SACOM3_BASE: aprint_normal_dev(self, "SA-11x0 UART3\n"); break; default: aprint_normal_dev(self, "unknown SA-11x0 UART\n"); break; } sacom_attach_subr(sc); #ifdef hpcarm /* Do hpcarm specific initialization, if any */ if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { mdinit = p->data; (*mdinit)(parent, self); } #endif sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); } void sacom_attach_subr(struct sacom_softc *sc) { bus_addr_t iobase = sc->sc_baseaddr; bus_space_tag_t iot = sc->sc_iot; struct tty *tp; /* XXX Do we need to disable interrupts here? */ if (iot == sacomconstag && iobase == sacomconsaddr) { sacomconsattached = 1; sc->sc_speed = SACOMSPEED(sacomconsrate); /* Make sure the console is always "hardwired". */ delay(10000); /* wait for output to finish */ SET(sc->sc_hwflags, COM_HW_CONSOLE); SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); } tp = tty_alloc(); tp->t_oproc = sacomstart; tp->t_param = sacomparam; tp->t_hwiflow = sacomhwiflow; sc->sc_tty = tp; sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; sc->sc_rbavail = SACOM_RING_SIZE; if (sc->sc_rbuf == NULL) { aprint_normal_dev(sc->sc_dev, "unable to allocate ring buffer\n"); return; } sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); sc->sc_tbc = 0; tty_attach(tp); if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { int maj; /* locate the major number */ maj = cdevsw_lookup_major(&sacom_cdevsw); cn_tab->cn_dev = makedev(maj, device_unit(sc->sc_dev)); delay(10000); /* XXX */ aprint_normal_dev(sc->sc_dev, "console\n"); delay(10000); /* XXX */ } sc->sc_si = softint_establish(SOFTINT_SERIAL, sacomsoft, sc); #ifdef RND_COM rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), RND_TYPE_TTY, RND_FLAG_COLLECT_TIME| RND_FLAG_ESTIMATE_TIME); #endif /* if there are no enable/disable functions, assume the device is always enabled */ if (!sc->enable) sc->enabled = 1; sacom_config(sc); SET(sc->sc_hwflags, COM_HW_DEV_OK); } /* This is necessary when dynamically changing SAIP configuration. */ int sacom_detach(device_t dev, int flags) { struct sacom_softc *sc = device_private(dev); int maj, mn; if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) return EBUSY; if (sc->disable != NULL && sc->enabled != 0) { (*sc->disable)(sc); sc->enabled = 0; } /* locate the major number */ maj = cdevsw_lookup_major(&sacom_cdevsw); /* Nuke the vnodes for any open instances. */ mn = device_unit(dev); vdevgone(maj, mn, mn, VCHR); mn |= COMDIALOUT_MASK; vdevgone(maj, mn, mn, VCHR); /* Free the receive buffer. */ free(sc->sc_rbuf, M_DEVBUF); /* Detach and free the tty. */ tty_detach(sc->sc_tty); tty_free(sc->sc_tty); /* Unhook the soft interrupt handler. */ softint_disestablish(sc->sc_si); #ifdef RND_COM /* Unhook the entropy source. */ rnd_detach_source(&sc->rnd_source); #endif return 0; } void sacom_config(struct sacom_softc *sc) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; /* Disable engine before configuring the device. */ sc->sc_cr3 = 0; bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); #ifdef DDB if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) sacom_enable_debugport(sc); #endif } #ifdef DDB static void sacom_enable_debugport(struct sacom_softc *sc) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int s; s = splserial(); COM_LOCK(sc); sc->sc_cr3 = CR3_RXE | CR3_TXE; bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); COM_UNLOCK(sc); splx(s); } #endif int sacom_activate(device_t dev, enum devact act) { struct sacom_softc *sc = device_private(dev); switch (act) { case DVACT_DEACTIVATE: sc->enabled = 0; return 0; default: return EOPNOTSUPP; } } void sacom_shutdown(struct sacom_softc *sc) { struct tty *tp = sc->sc_tty; int s; s = splserial(); COM_LOCK(sc); /* Clear any break condition set with TIOCSBRK. */ sacom_break(sc, 0); /* * Hang up if necessary. Wait a bit, so the other side has time to * notice even if we immediately open the port again. * Avoid tsleeping above splhigh(). */ if (ISSET(tp->t_cflag, HUPCL)) { sacom_modem(sc, 0); COM_UNLOCK(sc); splx(s); /* XXX tsleep will only timeout */ (void) tsleep(sc, TTIPRI, ttclos, hz); s = splserial(); COM_LOCK(sc); } /* Turn off interrupts. */ sc->sc_cr3 = 0; bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); if (sc->disable) { #ifdef DIAGNOSTIC if (!sc->enabled) panic("sacom_shutdown: not enabled?"); #endif (*sc->disable)(sc); sc->enabled = 0; } COM_UNLOCK(sc); splx(s); } int sacomopen(dev_t dev, int flag, int mode, struct lwp *l) { struct sacom_softc *sc; struct tty *tp; int s, s2; int error; sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || sc->sc_rbuf == NULL) return ENXIO; if (!device_is_active(sc->sc_dev)) return ENXIO; 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; s2 = splserial(); COM_LOCK(sc); if (sc->enable) { if ((*sc->enable)(sc)) { COM_UNLOCK(sc); splx(s2); splx(s); aprint_normal_dev(sc->sc_dev, "device enable failed\n"); return EIO; } sc->enabled = 1; sacom_config(sc); } /* Turn on interrupts. */ sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); COM_UNLOCK(sc); splx(s2); /* * 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 = sacomconsrate; t.c_cflag = sacomconscflag; } 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 sacomparam() will do something. */ tp->t_ospeed = 0; (void) sacomparam(tp, &t); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_lflag = TTYDEF_LFLAG; ttychars(tp); ttsetwater(tp); s2 = splserial(); COM_LOCK(sc); /* * Turn on DTR. We must always do this, even if carrier is not * present, because otherwise we'd have to use TIOCSDTR * immediately after setting CLOCAL, which applications do not * expect. We always assert DTR while the device is open * unless explicitly requested to deassert it. */ sacom_modem(sc, 1); /* Clear the input ring, and unblock. */ sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; sc->sc_rbavail = SACOM_RING_SIZE; sacom_iflush(sc); CLR(sc->sc_rx_flags, RX_ANY_BLOCK); sacom_hwiflow(sc); #ifdef COM_DEBUG if (sacom_debug) comstatus(sc, "sacomopen "); #endif COM_UNLOCK(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. */ sacom_shutdown(sc); } return error; } int sacomclose(dev_t dev, int flag, int mode, struct lwp *l) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; /* XXX This is for cons.c. */ if (!ISSET(tp->t_state, TS_ISOPEN)) return 0; (*tp->t_linesw->l_close)(tp, flag); ttyclose(tp); if (COM_ISALIVE(sc) == 0) 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. */ sacom_shutdown(sc); } return 0; } int sacomread(dev_t dev, struct uio *uio, int flag) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; if (COM_ISALIVE(sc) == 0) return EIO; return (*tp->t_linesw->l_read)(tp, uio, flag); } int sacomwrite(dev_t dev, struct uio *uio, int flag) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; if (COM_ISALIVE(sc) == 0) return EIO; return (*tp->t_linesw->l_write)(tp, uio, flag); } int sacompoll(dev_t dev, int events, struct lwp *l) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; if (COM_ISALIVE(sc) == 0) return EIO; return (*tp->t_linesw->l_poll)(tp, events, l); } struct tty * sacomtty(dev_t dev) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; return tp; } int sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); struct tty *tp = sc->sc_tty; int error; int s; if (COM_ISALIVE(sc) == 0) 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; error = 0; s = splserial(); COM_LOCK(sc); switch (cmd) { case TIOCSBRK: sacom_break(sc, 1); break; case TIOCCBRK: sacom_break(sc, 0); break; case TIOCSDTR: sacom_modem(sc, 1); break; case TIOCCDTR: sacom_modem(sc, 0); break; case TIOCGFLAGS: *(int *)data = sc->sc_swflags; break; case TIOCSFLAGS: error = kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_PRIVSET, tp); if (error) break; sc->sc_swflags = *(int *)data; break; case TIOCMSET: case TIOCMBIS: case TIOCMBIC: tiocm_to_sacom(sc, cmd, *(int *)data); break; case TIOCMGET: *(int *)data = sacom_to_tiocm(sc); break; default: error = EPASSTHROUGH; break; } COM_UNLOCK(sc); splx(s); #ifdef COM_DEBUG if (sacom_debug) comstatus(sc, "comioctl "); #endif return error; } static inline void sacom_schedrx(struct sacom_softc *sc) { sc->sc_rx_ready = 1; /* Wake up the poller. */ softint_schedule(sc->sc_si); } void sacom_break(struct sacom_softc *sc, int onoff) { if (onoff) SET(sc->sc_cr3, CR3_BRK); else CLR(sc->sc_cr3, CR3_BRK); if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else sacom_loadchannelregs(sc); } } void sacom_modem(struct sacom_softc *sc, int onoff) { if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else sacom_loadchannelregs(sc); } } void tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) { } int sacom_to_tiocm(struct sacom_softc *sc) { int ttybits = 0; if (sc->sc_cr3 != 0) SET(ttybits, TIOCM_LE); return ttybits; } static u_int cflag2cr0(tcflag_t cflag) { u_int cr0; cr0 = (cflag & PARENB) ? CR0_PE : 0; cr0 |= (cflag & PARODD) ? 0 : CR0_OES; cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; return cr0; } int sacomparam(struct tty *tp, struct termios *t) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); int ospeed = SACOMSPEED(t->c_ospeed); u_int cr0; int s; if (COM_ISALIVE(sc) == 0) return EIO; /* Check requested parameters. */ if (ospeed < 0) return EINVAL; 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; cr0 = cflag2cr0(t->c_cflag); s = splserial(); COM_LOCK(sc); sc->sc_cr0 = cr0; sc->sc_speed = ospeed; /* And copy to tty. */ tp->t_ispeed = 0; tp->t_ospeed = t->c_ospeed; tp->t_cflag = t->c_cflag; if (!sc->sc_heldchange) { if (sc->sc_tx_busy) { sc->sc_heldtbc = sc->sc_tbc; sc->sc_tbc = 0; sc->sc_heldchange = 1; } else sacom_loadchannelregs(sc); } if (!ISSET(t->c_cflag, CHWFLOW)) { /* Disable the high water mark. */ if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); sacom_schedrx(sc); } if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); sacom_hwiflow(sc); } } COM_UNLOCK(sc); splx(s); (void) (*tp->t_linesw->l_modem)(tp, 1); #ifdef COM_DEBUG if (sacom_debug) comstatus(sc, "comparam "); #endif return 0; } void sacom_iflush(struct sacom_softc *sc) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; #ifdef DIAGNOSTIC int reg; #endif int timo; #ifdef DIAGNOSTIC reg = 0xffff; #endif timo = 50; /* flush any pending I/O */ if (sc->sc_cr3 & CR3_RXE) { while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) && --timo) #ifdef DIAGNOSTIC reg = #else (void) #endif bus_space_read_4(iot, ioh, SACOM_DR); } #if 0 /* XXX is it good idea to wait TX finish? */ if (sc->sc_cr3 & CR3_TXE) { timo = 500; while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) && --timo) delay(100); } #endif #ifdef DIAGNOSTIC if (!timo) aprint_debug_dev(sc->sc_dev, "sacom_iflush timeout %02x\n", reg); #endif } void sacom_loadchannelregs(struct sacom_softc *sc) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; /* XXXXX necessary? */ sacom_iflush(sc); /* Need to stop engines first. */ bus_space_write_4(iot, ioh, SACOM_CR3, 0); bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); } int sacomhwiflow(struct tty *tp, int block) { #if 0 struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); int s; if (COM_ISALIVE(sc) == 0) return 0; if (sc->sc_mcr_rts == 0) return 0; s = splserial(); COM_LOCK(sc); if (block) { if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { SET(sc->sc_rx_flags, RX_TTY_BLOCKED); sacom_hwiflow(sc); } } else { if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); sacom_schedrx(sc); } if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); sacom_hwiflow(sc); } } COM_UNLOCK(sc); splx(s); #endif return 1; } /* * (un)block input via hw flowcontrol */ void sacom_hwiflow(struct sacom_softc *sc) { #if 0 bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; /* XXX implement */ #endif } void sacomstart(struct tty *tp) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int s; if (COM_ISALIVE(sc) == 0) return; s = spltty(); if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 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(); COM_LOCK(sc); sc->sc_tba = tba; sc->sc_tbc = tbc; } SET(tp->t_state, TS_BUSY); sc->sc_tx_busy = 1; /* Enable transmit completion interrupts if necessary. */ if (!ISSET(sc->sc_cr3, CR3_TIE)) { SET(sc->sc_cr3, CR3_TIE); bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); } /* Output the first chunk of the contiguous buffer. */ sacom_filltx(sc); COM_UNLOCK(sc); out: splx(s); return; } void sacom_filltx(struct sacom_softc *sc) { bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; int c, n; n = 0; while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) break; c = *(sc->sc_tba + n); c &= 0xff; bus_space_write_4(iot, ioh, SACOM_DR, c); n++; } sc->sc_tbc -= n; sc->sc_tba += n; } /* * Stop output on a line. */ void sacomstop(struct tty *tp, int flag) { struct sacom_softc *sc = device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); int s; s = splserial(); COM_LOCK(sc); if (ISSET(tp->t_state, TS_BUSY)) { /* Stop transmitting at the next chunk. */ sc->sc_tbc = 0; sc->sc_heldtbc = 0; if (!ISSET(tp->t_state, TS_TTSTOP)) SET(tp->t_state, TS_FLUSH); } COM_UNLOCK(sc); splx(s); } static inline void sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) { int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; u_char *get, *end; u_int cc, scc; u_char sr1; int code; int s; end = sc->sc_ebuf; get = sc->sc_rbget; scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; while (cc) { code = get[0]; sr1 = get[1]; if (ISSET(sr1, SR1_FRE)) SET(code, TTY_FE); if (ISSET(sr1, SR1_PRE)) SET(code, TTY_PE); if ((*rint)(code, tp) == -1) { /* * The line discipline's buffer is out of space. */ if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { /* * 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 >= end) get -= SACOM_RING_SIZE << 1; cc = 0; } else { /* * Don't schedule any more receive processing * until the line discipline tells us there's * space available (through comhwiflow()). * Leave the rest of the data in the input * buffer. */ SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); } break; } get += 2; if (get >= end) get = sc->sc_rbuf; cc--; } if (cc != scc) { sc->sc_rbget = get; s = splserial(); COM_LOCK(sc); cc = sc->sc_rbavail += scc - cc; /* Buffers should be ok again, release possible block. */ if (cc >= 1) { if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); SET(sc->sc_cr3, CR3_RIE); bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); } } COM_UNLOCK(sc); splx(s); } } static inline void sacom_txsoft(struct sacom_softc *sc, struct tty *tp) { 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); } static inline void sacom_stsoft(struct sacom_softc *sc, struct tty *tp) { } void sacomsoft(void *arg) { struct sacom_softc *sc = arg; struct tty *tp; if (COM_ISALIVE(sc) == 0) return; tp = sc->sc_tty; if (sc->sc_rx_ready) { sc->sc_rx_ready = 0; sacom_rxsoft(sc, tp); } if (sc->sc_st_check) { sc->sc_st_check = 0; sacom_stsoft(sc, tp); } if (sc->sc_tx_done) { sc->sc_tx_done = 0; sacom_txsoft(sc, tp); } } int sacomintr(void *arg) { struct sacom_softc *sc = arg; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; u_char *put, *end; u_int cc; u_int sr0, sr1; if (COM_ISALIVE(sc) == 0) return 0; COM_LOCK(sc); sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); if (!sr0) { COM_UNLOCK(sc); return 0; } if (ISSET(sr0, SR0_EIF)) /* XXX silently discard error bits */ bus_space_read_4(iot, ioh, SACOM_DR); if (ISSET(sr0, SR0_RBB)) bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); if (ISSET(sr0, SR0_REB)) { bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); #if defined(DDB) || defined(KGDB) #ifndef DDB_BREAK_CHAR if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { console_debugger(); } #endif #endif /* DDB || KGDB */ } end = sc->sc_ebuf; put = sc->sc_rbput; cc = sc->sc_rbavail; sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); if (ISSET(sr0, SR0_RFS | SR0_RID)) { if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { while (cc > 0) { if (!ISSET(sr1, SR1_RNE)) { bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RID); break; } put[0] = bus_space_read_4(iot, ioh, SACOM_DR); put[1] = sr1; #if defined(DDB) && defined(DDB_BREAK_CHAR) if (put[0] == DDB_BREAK_CHAR && ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { console_debugger(); sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); continue; } #endif put += 2; if (put >= end) put = sc->sc_rbuf; cc--; sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); } /* * 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; if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) sc->sc_rx_ready = 1; /* XXX do RX hardware flow control */ /* * If we're out of space, disable receive interrupts * until the queue has drained a bit. */ if (!cc) { SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); CLR(sc->sc_cr3, CR3_RIE); bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); } } else { #ifdef DIAGNOSTIC panic("sacomintr: we shouldn't reach here"); #endif CLR(sc->sc_cr3, CR3_RIE); bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); } } /* * 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. */ sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); if (ISSET(sr0, SR0_TFS)) { /* * If we've delayed a parameter change, do it now, and restart * output. * XXX sacom_loadchannelregs() waits TX completion, * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case */ if (sc->sc_heldchange) { sacom_loadchannelregs(sc); sc->sc_heldchange = 0; sc->sc_tbc = sc->sc_heldtbc; sc->sc_heldtbc = 0; } /* Output the next chunk of the contiguous buffer, if any. */ if (sc->sc_tbc > 0) { sacom_filltx(sc); } else { /* Disable transmit completion interrupts if necessary. */ if (ISSET(sc->sc_cr3, CR3_TIE)) { CLR(sc->sc_cr3, CR3_TIE); bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); } if (sc->sc_tx_busy) { sc->sc_tx_busy = 0; sc->sc_tx_done = 1; } } } COM_UNLOCK(sc); /* Wake up the poller. */ softint_schedule(sc->sc_si); #ifdef RND_COM rnd_add_uint32(&sc->rnd_source, iir | lsr); #endif return 1; } static void sacom_j720_init(device_t parent, device_t self) { struct sa11x0_softc *sasc; sasc = device_private(parent); /* XXX this should be done at sc->enable function */ bus_space_write_4(sasc->sc_iot, sasc->sc_gpioh, SAGPIO_PCR, 0xa0000); bus_space_write_4(sasc->sc_iot, sasc->sc_gpioh, SAGPIO_PSR, 0x100); } /* Initialization for serial console */ int sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, bus_space_handle_t *iohp) { int brd, cr0; if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) aprint_normal("register map failed\n"); /* wait for the Tx queue to drain and disable the UART */ while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) continue; bus_space_write_4(iot, *iohp, SACOM_CR3, 0); cr0 = cflag2cr0(cflag); bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); brd = SACOMSPEED(baud); sacomconsrate = baud; sacomconsaddr = iobase; sacomconscflag = cflag; /* XXX assumes little endian */ bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); /* enable the UART */ bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); return 0; } void sacomcnprobe(struct consdev *cp) { cp->cn_pri = CN_REMOTE; } void sacomcninit(struct consdev *cp) { if (cp == NULL) { /* XXX cp == NULL means that MMU is disabled. */ sacomconsioh = SACOM3_BASE; sacomconstag = &sa11x0_bs_tag; cn_tab = &sacomcons; return; } if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, CONMODE, &sacomconsioh)) panic("can't init serial console @%x", CONADDR); cn_tab = &sacomcons; sacomconstag = &sa11x0_bs_tag; } int sacomcngetc(dev_t dev) { int c, s; s = spltty(); /* XXX do we need this? */ while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) & SR1_RNE)) { #if defined(DDB) || defined(KGDB) #ifndef DDB_BREAK_CHAR u_int sr0; extern int db_active; sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); if (ISSET(sr0, SR0_RBB)) bus_space_write_4(sacomconstag, sacomconsioh, SACOM_SR0, SR0_RBB); if (ISSET(sr0, SR0_REB)) { bus_space_write_4(sacomconstag, sacomconsioh, SACOM_SR0, SR0_REB); if (db_active == 0) console_debugger(); } #endif #endif /* DDB || KGDB */ } c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); c &= 0xff; splx(s); return c; } void sacomcnputc(dev_t dev, int c) { int s; s = spltty(); /* XXX do we need this? */ while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) & SR1_TNF)) continue; bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); splx(s); } void sacomcnpollc(dev_t dev, int on) { } #if 0 #ifdef DEBUG int sacomcncharpoll(void) { int c; if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) & SR1_RNE)) return -1; c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); c &= 0xff; return c; } #endif #endif /* helper function to identify the com ports used by console or KGDB (and not yet autoconf attached) */ int sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, bus_space_handle_t *ioh) { bus_space_handle_t help; if (!sacomconsattached && iot == sacomconstag && iobase == sacomconsaddr) help = sacomconsioh; else return 0; if (ioh) *ioh = help; return 1; }